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428
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1 /* File IO for XEmacs.
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2 Copyright (C) 1985-1988, 1992-1995 Free Software Foundation, Inc.
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563
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3 Copyright (C) 1996, 2001 Ben Wing.
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428
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Mule 2.0, FSF 19.30. */
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23 /* More syncing: FSF Emacs 19.34.6 by Marc Paquette <marcpa@cam.org> */
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24
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25 #include <config.h>
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26 #include "lisp.h"
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27
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28 #include "buffer.h"
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29 #include "events.h"
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30 #include "frame.h"
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31 #include "insdel.h"
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32 #include "lstream.h"
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33 #include "redisplay.h"
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34 #include "sysdep.h"
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35 #include "window.h" /* minibuf_level */
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36 #ifdef FILE_CODING
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37 #include "file-coding.h"
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38 #endif
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39
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40 #ifdef HAVE_LIBGEN_H /* Must come before sysfile.h */
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41 #include <libgen.h>
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42 #endif
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43 #include "sysfile.h"
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44 #include "sysproc.h"
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45 #include "syspwd.h"
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46 #include "systime.h"
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47 #include "sysdir.h"
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48
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49 #ifdef HPUX
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50 #include <netio.h>
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51 #ifdef HPUX_PRE_8_0
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52 #include <errnet.h>
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53 #endif /* HPUX_PRE_8_0 */
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54 #endif /* HPUX */
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55
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657
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56 #if defined(WIN32_NATIVE) || defined(CYGWIN)
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57 #define WIN32_FILENAMES
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442
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58 #ifdef WIN32_NATIVE
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592
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59 #include "nt.h"
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657
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60 #endif /* WIN32_NATIVE */
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428
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61 #define IS_DRIVE(x) isalpha (x)
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62 /* Need to lower-case the drive letter, or else expanded
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63 filenames will sometimes compare inequal, because
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64 `expand-file-name' doesn't always down-case the drive letter. */
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65 #define DRIVE_LETTER(x) tolower (x)
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657
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66 #ifndef CORRECT_DIR_SEPS
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67 #define CORRECT_DIR_SEPS(s) \
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68 normalize_filename(s, DIRECTORY_SEP)
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69 /* Default implementation that coerces a file to use path_sep. */
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70 static void
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665
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71 normalize_filename (Intbyte *fp, Intbyte path_sep)
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657
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72 {
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73 /* Always lower-case drive letters a-z, even if the filesystem
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74 preserves case in filenames.
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75 This is so filenames can be compared by string comparison
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76 functions that are case-sensitive. Even case-preserving filesystems
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77 do not distinguish case in drive letters. */
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78 if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z')
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79 {
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80 *fp += 'a' - 'A';
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81 fp += 2;
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82 }
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83
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84 while (*fp)
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85 {
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86 if (*fp == '/' || *fp == '\\')
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87 *fp = path_sep;
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88 fp++;
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89 }
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90 }
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91 #endif /* CORRECT_DIR_SEPS */
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92 #endif /* WIN32_NATIVE || CYGWIN */
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428
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93
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94 int lisp_to_time (Lisp_Object, time_t *);
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95 Lisp_Object time_to_lisp (time_t);
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96
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97 /* Nonzero during writing of auto-save files */
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98 static int auto_saving;
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99
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100 /* Set by auto_save_1 to mode of original file so Fwrite_region_internal
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101 will create a new file with the same mode as the original */
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102 static int auto_save_mode_bits;
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103
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104 /* Alist of elements (REGEXP . HANDLER) for file names
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105 whose I/O is done with a special handler. */
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106 Lisp_Object Vfile_name_handler_alist;
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107
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108 /* Format for auto-save files */
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109 Lisp_Object Vauto_save_file_format;
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110
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111 /* Lisp functions for translating file formats */
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112 Lisp_Object Qformat_decode, Qformat_annotate_function;
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113
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114 /* Functions to be called to process text properties in inserted file. */
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115 Lisp_Object Vafter_insert_file_functions;
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116
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117 /* Functions to be called to create text property annotations for file. */
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118 Lisp_Object Vwrite_region_annotate_functions;
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119
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120 /* During build_annotations, each time an annotation function is called,
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121 this holds the annotations made by the previous functions. */
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122 Lisp_Object Vwrite_region_annotations_so_far;
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123
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124 /* File name in which we write a list of all our auto save files. */
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125 Lisp_Object Vauto_save_list_file_name;
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126
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444
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127 /* Prefix used to construct Vauto_save_list_file_name. */
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128 Lisp_Object Vauto_save_list_file_prefix;
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129
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130 /* When non-nil, it prevents auto-save list file creation. */
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131 int inhibit_auto_save_session;
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132
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428
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133 int disable_auto_save_when_buffer_shrinks;
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134
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135 Lisp_Object Vdirectory_sep_char;
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136
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137 /* These variables describe handlers that have "already" had a chance
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138 to handle the current operation.
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139
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140 Vinhibit_file_name_handlers is a list of file name handlers.
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141 Vinhibit_file_name_operation is the operation being handled.
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142 If we try to handle that operation, we ignore those handlers. */
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143
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144 static Lisp_Object Vinhibit_file_name_handlers;
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145 static Lisp_Object Vinhibit_file_name_operation;
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146
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563
|
147 Lisp_Object Qfile_already_exists;
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428
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148
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149 Lisp_Object Qauto_save_hook;
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150 Lisp_Object Qauto_save_error;
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151 Lisp_Object Qauto_saving;
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152
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153 Lisp_Object Qcar_less_than_car;
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154
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155 Lisp_Object Qcompute_buffer_file_truename;
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156
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157 EXFUN (Frunning_temacs_p, 0);
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158
|
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563
|
159 /* DATA can be anything acceptable to signal_error ().
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160 */
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161
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162 DOESNT_RETURN
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163 report_file_type_error (Lisp_Object errtype, Lisp_Object oserrmess,
|
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665
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164 const CIntbyte *string, Lisp_Object data)
|
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563
|
165 {
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166 struct gcpro gcpro1;
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167 Lisp_Object errdata = build_error_data (NULL, data);
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168
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169 GCPRO1 (errdata);
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170 errdata = Fcons (build_translated_string (string),
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171 Fcons (oserrmess, errdata));
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172 signal_error_1 (errtype, errdata);
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173 UNGCPRO; /* not reached */
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174 }
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175
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176 DOESNT_RETURN
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|
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177 report_error_with_errno (Lisp_Object errtype,
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665
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178 const CIntbyte *string, Lisp_Object data)
|
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563
|
179 {
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|
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180 report_file_type_error (errtype, lisp_strerror (errno), string, data);
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|
181 }
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182
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428
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183 /* signal a file error when errno contains a meaningful value. */
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184
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185 DOESNT_RETURN
|
|
665
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186 report_file_error (const CIntbyte *string, Lisp_Object data)
|
|
428
|
187 {
|
|
563
|
188 report_error_with_errno (Qfile_error, string, data);
|
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428
|
189 }
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190
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191
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192 /* Just like strerror(3), except return a lisp string instead of char *.
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193 The string needs to be converted since it may be localized.
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194 Perhaps this should use strerror-coding-system instead? */
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195 Lisp_Object
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196 lisp_strerror (int errnum)
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|
|
197 {
|
|
440
|
198 return build_ext_string (strerror (errnum), Qnative);
|
|
428
|
199 }
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200
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|
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201 static Lisp_Object
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|
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202 close_file_unwind (Lisp_Object fd)
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|
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203 {
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|
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204 if (CONSP (fd))
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|
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205 {
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|
|
206 if (INTP (XCAR (fd)))
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|
207 close (XINT (XCAR (fd)));
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|
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208
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|
|
209 free_cons (XCONS (fd));
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|
|
210 }
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|
|
211 else
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|
|
212 close (XINT (fd));
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|
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213
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|
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214 return Qnil;
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|
|
215 }
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216
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|
|
217 static Lisp_Object
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|
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218 delete_stream_unwind (Lisp_Object stream)
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|
|
219 {
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|
|
220 Lstream_delete (XLSTREAM (stream));
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|
|
221 return Qnil;
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|
|
222 }
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|
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223
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|
|
224 /* Restore point, having saved it as a marker. */
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225
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|
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226 static Lisp_Object
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|
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227 restore_point_unwind (Lisp_Object point_marker)
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|
|
228 {
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|
|
229 BUF_SET_PT (current_buffer, marker_position (point_marker));
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|
|
230 return Fset_marker (point_marker, Qnil, Qnil);
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|
|
231 }
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232
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|
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233 /* Versions of read() and write() that allow quitting out of the actual
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234 I/O. We don't use immediate_quit (i.e. direct longjmp() out of the
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|
|
235 signal handler) because that's way too losing.
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|
|
236
|
|
|
237 (#### Actually, longjmp()ing out of the signal handler may not be
|
|
613
|
238 as losing as I thought. See qxe_reliable_signal() in sysdep.c.) */
|
|
428
|
239
|
|
665
|
240 Bytecount
|
|
|
241 read_allowing_quit (int fildes, void *buf, Bytecount size)
|
|
428
|
242 {
|
|
|
243 QUIT;
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|
|
244 return sys_read_1 (fildes, buf, size, 1);
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|
|
245 }
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|
|
246
|
|
665
|
247 Bytecount
|
|
|
248 write_allowing_quit (int fildes, const void *buf, Bytecount size)
|
|
428
|
249 {
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|
|
250 QUIT;
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|
|
251 return sys_write_1 (fildes, buf, size, 1);
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|
|
252 }
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253
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254
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|
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255 Lisp_Object Qexpand_file_name;
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|
256 Lisp_Object Qfile_truename;
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|
|
257 Lisp_Object Qsubstitute_in_file_name;
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258 Lisp_Object Qdirectory_file_name;
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259 Lisp_Object Qfile_name_directory;
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|
260 Lisp_Object Qfile_name_nondirectory;
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|
|
261 Lisp_Object Qunhandled_file_name_directory;
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|
|
262 Lisp_Object Qfile_name_as_directory;
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|
|
263 Lisp_Object Qcopy_file;
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|
|
264 Lisp_Object Qmake_directory_internal;
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|
|
265 Lisp_Object Qdelete_directory;
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266 Lisp_Object Qdelete_file;
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|
|
267 Lisp_Object Qrename_file;
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|
|
268 Lisp_Object Qadd_name_to_file;
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|
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269 Lisp_Object Qmake_symbolic_link;
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270 Lisp_Object Qfile_exists_p;
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|
|
271 Lisp_Object Qfile_executable_p;
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|
|
272 Lisp_Object Qfile_readable_p;
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273 Lisp_Object Qfile_symlink_p;
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|
274 Lisp_Object Qfile_writable_p;
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275 Lisp_Object Qfile_directory_p;
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276 Lisp_Object Qfile_regular_p;
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277 Lisp_Object Qfile_accessible_directory_p;
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|
|
278 Lisp_Object Qfile_modes;
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|
|
279 Lisp_Object Qset_file_modes;
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280 Lisp_Object Qfile_newer_than_file_p;
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281 Lisp_Object Qinsert_file_contents;
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282 Lisp_Object Qwrite_region;
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283 Lisp_Object Qverify_visited_file_modtime;
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284 Lisp_Object Qset_visited_file_modtime;
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285
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|
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286 /* If FILENAME is handled specially on account of its syntax,
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287 return its handler function. Otherwise, return nil. */
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|
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288
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|
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289 DEFUN ("find-file-name-handler", Ffind_file_name_handler, 1, 2, 0, /*
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|
|
290 Return FILENAME's handler function for OPERATION, if it has one.
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|
|
291 Otherwise, return nil.
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|
|
292 A file name is handled if one of the regular expressions in
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|
|
293 `file-name-handler-alist' matches it.
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|
|
294
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|
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295 If OPERATION equals `inhibit-file-name-operation', then we ignore
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296 any handlers that are members of `inhibit-file-name-handlers',
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|
|
297 but we still do run any other handlers. This lets handlers
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298 use the standard functions without calling themselves recursively.
|
|
751
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299
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|
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300 Otherwise, OPERATION is the name of a funcall'able function.
|
|
428
|
301 */
|
|
|
302 (filename, operation))
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|
|
303 {
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|
|
304 /* This function does not GC */
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|
|
305 /* This function can be called during GC */
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|
|
306 /* This function must not munge the match data. */
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|
|
307 Lisp_Object chain, inhibited_handlers;
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|
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308
|
|
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309 CHECK_STRING (filename);
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|
|
310
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|
|
311 if (EQ (operation, Vinhibit_file_name_operation))
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|
|
312 inhibited_handlers = Vinhibit_file_name_handlers;
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|
|
313 else
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|
|
314 inhibited_handlers = Qnil;
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|
|
315
|
|
|
316 EXTERNAL_LIST_LOOP (chain, Vfile_name_handler_alist)
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|
|
317 {
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|
|
318 Lisp_Object elt = XCAR (chain);
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|
|
319 if (CONSP (elt))
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|
|
320 {
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|
|
321 Lisp_Object string = XCAR (elt);
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|
|
322 if (STRINGP (string)
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|
|
323 && (fast_lisp_string_match (string, filename) >= 0))
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|
|
324 {
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|
|
325 Lisp_Object handler = XCDR (elt);
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|
|
326 if (NILP (Fmemq (handler, inhibited_handlers)))
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|
|
327 return handler;
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|
|
328 }
|
|
|
329 }
|
|
|
330 QUIT;
|
|
|
331 }
|
|
|
332 return Qnil;
|
|
|
333 }
|
|
|
334
|
|
|
335 static Lisp_Object
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|
|
336 call2_check_string (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1)
|
|
|
337 {
|
|
|
338 /* This function can call lisp */
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|
|
339 Lisp_Object result = call2 (fn, arg0, arg1);
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|
|
340 CHECK_STRING (result);
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|
|
341 return result;
|
|
|
342 }
|
|
|
343
|
|
|
344 static Lisp_Object
|
|
|
345 call2_check_string_or_nil (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1)
|
|
|
346 {
|
|
|
347 /* This function can call lisp */
|
|
|
348 Lisp_Object result = call2 (fn, arg0, arg1);
|
|
|
349 if (!NILP (result))
|
|
|
350 CHECK_STRING (result);
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|
|
351 return result;
|
|
|
352 }
|
|
|
353
|
|
|
354 static Lisp_Object
|
|
|
355 call3_check_string (Lisp_Object fn, Lisp_Object arg0,
|
|
|
356 Lisp_Object arg1, Lisp_Object arg2)
|
|
|
357 {
|
|
|
358 /* This function can call lisp */
|
|
|
359 Lisp_Object result = call3 (fn, arg0, arg1, arg2);
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|
|
360 CHECK_STRING (result);
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|
|
361 return result;
|
|
|
362 }
|
|
|
363
|
|
|
364
|
|
|
365 DEFUN ("file-name-directory", Ffile_name_directory, 1, 1, 0, /*
|
|
444
|
366 Return the directory component in file name FILENAME.
|
|
|
367 Return nil if FILENAME does not include a directory.
|
|
428
|
368 Otherwise return a directory spec.
|
|
|
369 Given a Unix syntax file name, returns a string ending in slash.
|
|
|
370 */
|
|
444
|
371 (filename))
|
|
428
|
372 {
|
|
442
|
373 /* This function can GC. GC checked 2000-07-28 ben */
|
|
665
|
374 Intbyte *beg;
|
|
|
375 Intbyte *p;
|
|
428
|
376 Lisp_Object handler;
|
|
|
377
|
|
444
|
378 CHECK_STRING (filename);
|
|
428
|
379
|
|
|
380 /* If the file name has special constructs in it,
|
|
|
381 call the corresponding file handler. */
|
|
444
|
382 handler = Ffind_file_name_handler (filename, Qfile_name_directory);
|
|
428
|
383 if (!NILP (handler))
|
|
444
|
384 return call2_check_string_or_nil (handler, Qfile_name_directory, filename);
|
|
428
|
385
|
|
|
386 #ifdef FILE_SYSTEM_CASE
|
|
444
|
387 filename = FILE_SYSTEM_CASE (filename);
|
|
428
|
388 #endif
|
|
444
|
389 beg = XSTRING_DATA (filename);
|
|
|
390 p = beg + XSTRING_LENGTH (filename);
|
|
428
|
391
|
|
|
392 while (p != beg && !IS_ANY_SEP (p[-1])
|
|
657
|
393 #ifdef WIN32_FILENAMES
|
|
428
|
394 /* only recognize drive specifier at beginning */
|
|
|
395 && !(p[-1] == ':' && p == beg + 2)
|
|
|
396 #endif
|
|
|
397 ) p--;
|
|
|
398
|
|
|
399 if (p == beg)
|
|
|
400 return Qnil;
|
|
442
|
401 #ifdef WIN32_NATIVE
|
|
428
|
402 /* Expansion of "c:" to drive and default directory. */
|
|
|
403 /* (NT does the right thing.) */
|
|
|
404 if (p == beg + 2 && beg[1] == ':')
|
|
|
405 {
|
|
|
406 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
|
|
665
|
407 Intbyte *res = (Intbyte*) alloca (MAXPATHLEN + 1);
|
|
442
|
408 if (_getdcwd (toupper (*beg) - 'A' + 1, (char *)res, MAXPATHLEN))
|
|
428
|
409 {
|
|
|
410 char *c=((char *) res) + strlen ((char *) res);
|
|
|
411 if (!IS_DIRECTORY_SEP (*c))
|
|
|
412 {
|
|
|
413 *c++ = DIRECTORY_SEP;
|
|
|
414 *c = '\0';
|
|
|
415 }
|
|
|
416 beg = res;
|
|
|
417 p = beg + strlen ((char *) beg);
|
|
|
418 }
|
|
|
419 }
|
|
442
|
420 #endif /* WIN32_NATIVE */
|
|
428
|
421 return make_string (beg, p - beg);
|
|
|
422 }
|
|
|
423
|
|
|
424 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, 1, 1, 0, /*
|
|
444
|
425 Return file name FILENAME sans its directory.
|
|
428
|
426 For example, in a Unix-syntax file name,
|
|
|
427 this is everything after the last slash,
|
|
|
428 or the entire name if it contains no slash.
|
|
|
429 */
|
|
444
|
430 (filename))
|
|
428
|
431 {
|
|
442
|
432 /* This function can GC. GC checked 2000-07-28 ben */
|
|
665
|
433 Intbyte *beg, *p, *end;
|
|
428
|
434 Lisp_Object handler;
|
|
|
435
|
|
444
|
436 CHECK_STRING (filename);
|
|
428
|
437
|
|
|
438 /* If the file name has special constructs in it,
|
|
|
439 call the corresponding file handler. */
|
|
444
|
440 handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory);
|
|
428
|
441 if (!NILP (handler))
|
|
444
|
442 return call2_check_string (handler, Qfile_name_nondirectory, filename);
|
|
|
443
|
|
|
444 beg = XSTRING_DATA (filename);
|
|
|
445 end = p = beg + XSTRING_LENGTH (filename);
|
|
428
|
446
|
|
|
447 while (p != beg && !IS_ANY_SEP (p[-1])
|
|
657
|
448 #ifdef WIN32_FILENAMES
|
|
428
|
449 /* only recognize drive specifier at beginning */
|
|
|
450 && !(p[-1] == ':' && p == beg + 2)
|
|
|
451 #endif
|
|
|
452 ) p--;
|
|
|
453
|
|
|
454 return make_string (p, end - p);
|
|
|
455 }
|
|
|
456
|
|
|
457 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, 1, 1, 0, /*
|
|
|
458 Return a directly usable directory name somehow associated with FILENAME.
|
|
|
459 A `directly usable' directory name is one that may be used without the
|
|
|
460 intervention of any file handler.
|
|
|
461 If FILENAME is a directly usable file itself, return
|
|
|
462 \(file-name-directory FILENAME).
|
|
|
463 The `call-process' and `start-process' functions use this function to
|
|
|
464 get a current directory to run processes in.
|
|
|
465 */
|
|
444
|
466 (filename))
|
|
428
|
467 {
|
|
442
|
468 /* This function can GC. GC checked 2000-07-28 ben */
|
|
428
|
469 Lisp_Object handler;
|
|
|
470
|
|
|
471 /* If the file name has special constructs in it,
|
|
|
472 call the corresponding file handler. */
|
|
|
473 handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory);
|
|
|
474 if (!NILP (handler))
|
|
|
475 return call2 (handler, Qunhandled_file_name_directory,
|
|
|
476 filename);
|
|
|
477
|
|
|
478 return Ffile_name_directory (filename);
|
|
|
479 }
|
|
|
480
|
|
|
481
|
|
|
482 static char *
|
|
|
483 file_name_as_directory (char *out, char *in)
|
|
|
484 {
|
|
442
|
485 /* This function cannot GC */
|
|
428
|
486 int size = strlen (in);
|
|
|
487
|
|
|
488 if (size == 0)
|
|
|
489 {
|
|
|
490 out[0] = '.';
|
|
|
491 out[1] = DIRECTORY_SEP;
|
|
|
492 out[2] = '\0';
|
|
|
493 }
|
|
|
494 else
|
|
|
495 {
|
|
|
496 strcpy (out, in);
|
|
|
497 /* Append a slash if necessary */
|
|
|
498 if (!IS_ANY_SEP (out[size-1]))
|
|
|
499 {
|
|
|
500 out[size] = DIRECTORY_SEP;
|
|
|
501 out[size + 1] = '\0';
|
|
|
502 }
|
|
|
503 }
|
|
|
504 return out;
|
|
|
505 }
|
|
|
506
|
|
|
507 DEFUN ("file-name-as-directory", Ffile_name_as_directory, 1, 1, 0, /*
|
|
|
508 Return a string representing file FILENAME interpreted as a directory.
|
|
|
509 This operation exists because a directory is also a file, but its name as
|
|
|
510 a directory is different from its name as a file.
|
|
|
511 The result can be used as the value of `default-directory'
|
|
|
512 or passed as second argument to `expand-file-name'.
|
|
|
513 For a Unix-syntax file name, just appends a slash,
|
|
|
514 except for (file-name-as-directory \"\") => \"./\".
|
|
|
515 */
|
|
444
|
516 (filename))
|
|
428
|
517 {
|
|
442
|
518 /* This function can GC. GC checked 2000-07-28 ben */
|
|
428
|
519 char *buf;
|
|
|
520 Lisp_Object handler;
|
|
|
521
|
|
444
|
522 CHECK_STRING (filename);
|
|
428
|
523
|
|
|
524 /* If the file name has special constructs in it,
|
|
|
525 call the corresponding file handler. */
|
|
444
|
526 handler = Ffind_file_name_handler (filename, Qfile_name_as_directory);
|
|
428
|
527 if (!NILP (handler))
|
|
444
|
528 return call2_check_string (handler, Qfile_name_as_directory, filename);
|
|
|
529
|
|
|
530 buf = (char *) alloca (XSTRING_LENGTH (filename) + 10);
|
|
428
|
531 return build_string (file_name_as_directory
|
|
444
|
532 (buf, (char *) XSTRING_DATA (filename)));
|
|
428
|
533 }
|
|
|
534
|
|
|
535 /*
|
|
|
536 * Convert from directory name to filename.
|
|
|
537 * On UNIX, it's simple: just make sure there isn't a terminating /
|
|
|
538 *
|
|
|
539 * Value is nonzero if the string output is different from the input.
|
|
|
540 */
|
|
|
541
|
|
|
542 static int
|
|
442
|
543 directory_file_name (const char *src, char *dst)
|
|
428
|
544 {
|
|
442
|
545 /* This function cannot GC */
|
|
440
|
546 long slen = strlen (src);
|
|
428
|
547 /* Process as Unix format: just remove any final slash.
|
|
|
548 But leave "/" unchanged; do not change it to "". */
|
|
|
549 strcpy (dst, src);
|
|
|
550 if (slen > 1
|
|
|
551 && IS_DIRECTORY_SEP (dst[slen - 1])
|
|
657
|
552 #ifdef WIN32_FILENAMES
|
|
428
|
553 && !IS_ANY_SEP (dst[slen - 2])
|
|
657
|
554 #endif /* WIN32_FILENAMES */
|
|
428
|
555 )
|
|
|
556 dst[slen - 1] = 0;
|
|
|
557 return 1;
|
|
|
558 }
|
|
|
559
|
|
|
560 DEFUN ("directory-file-name", Fdirectory_file_name, 1, 1, 0, /*
|
|
444
|
561 Return the file name of the directory named DIRECTORY.
|
|
|
562 This is the name of the file that holds the data for the directory.
|
|
428
|
563 This operation exists because a directory is also a file, but its name as
|
|
|
564 a directory is different from its name as a file.
|
|
|
565 In Unix-syntax, this function just removes the final slash.
|
|
|
566 */
|
|
|
567 (directory))
|
|
|
568 {
|
|
442
|
569 /* This function can GC. GC checked 2000-07-28 ben */
|
|
428
|
570 char *buf;
|
|
|
571 Lisp_Object handler;
|
|
|
572
|
|
|
573 CHECK_STRING (directory);
|
|
|
574
|
|
|
575 #if 0 /* #### WTF? */
|
|
|
576 if (NILP (directory))
|
|
|
577 return Qnil;
|
|
|
578 #endif
|
|
|
579
|
|
|
580 /* If the file name has special constructs in it,
|
|
|
581 call the corresponding file handler. */
|
|
|
582 handler = Ffind_file_name_handler (directory, Qdirectory_file_name);
|
|
|
583 if (!NILP (handler))
|
|
|
584 return call2_check_string (handler, Qdirectory_file_name, directory);
|
|
|
585 buf = (char *) alloca (XSTRING_LENGTH (directory) + 20);
|
|
|
586 directory_file_name ((char *) XSTRING_DATA (directory), buf);
|
|
|
587 return build_string (buf);
|
|
|
588 }
|
|
|
589
|
|
|
590 /* Fmake_temp_name used to be a simple wrapper around mktemp(), but it
|
|
|
591 proved too broken for our purposes (it supported only 26 or 62
|
|
|
592 unique names under some implementations). For example, this
|
|
|
593 arbitrary limit broke generation of Gnus Incoming* files.
|
|
|
594
|
|
|
595 This implementation is better than what one usually finds in libc.
|
|
|
596 --hniksic */
|
|
|
597
|
|
442
|
598 static unsigned int temp_name_rand;
|
|
|
599
|
|
428
|
600 DEFUN ("make-temp-name", Fmake_temp_name, 1, 1, 0, /*
|
|
442
|
601 Generate a temporary file name starting with PREFIX.
|
|
428
|
602 The Emacs process number forms part of the result, so there is no
|
|
|
603 danger of generating a name being used by another process.
|
|
|
604
|
|
|
605 In addition, this function makes an attempt to choose a name that
|
|
|
606 does not specify an existing file. To make this work, PREFIX should
|
|
|
607 be an absolute file name.
|
|
|
608 */
|
|
|
609 (prefix))
|
|
|
610 {
|
|
442
|
611 static const char tbl[64] =
|
|
|
612 {
|
|
428
|
613 'A','B','C','D','E','F','G','H',
|
|
|
614 'I','J','K','L','M','N','O','P',
|
|
|
615 'Q','R','S','T','U','V','W','X',
|
|
|
616 'Y','Z','a','b','c','d','e','f',
|
|
|
617 'g','h','i','j','k','l','m','n',
|
|
|
618 'o','p','q','r','s','t','u','v',
|
|
|
619 'w','x','y','z','0','1','2','3',
|
|
442
|
620 '4','5','6','7','8','9','-','_'
|
|
|
621 };
|
|
428
|
622
|
|
|
623 Lisp_Object val;
|
|
|
624 Bytecount len;
|
|
665
|
625 Intbyte *p, *data;
|
|
428
|
626
|
|
|
627 CHECK_STRING (prefix);
|
|
|
628
|
|
|
629 /* I was tempted to apply Fexpand_file_name on PREFIX here, but it's
|
|
|
630 a bad idea because:
|
|
|
631
|
|
|
632 1) It might change the prefix, so the resulting string might not
|
|
|
633 begin with PREFIX. This violates the principle of least
|
|
|
634 surprise.
|
|
|
635
|
|
|
636 2) It breaks under many unforeseeable circumstances, such as with
|
|
|
637 the code that uses (make-temp-name "") instead of
|
|
|
638 (make-temp-name "./").
|
|
|
639
|
|
|
640 3) It might yield unexpected (to stat(2)) results in the presence
|
|
|
641 of EFS and file name handlers. */
|
|
|
642
|
|
|
643 len = XSTRING_LENGTH (prefix);
|
|
|
644 val = make_uninit_string (len + 6);
|
|
|
645 data = XSTRING_DATA (val);
|
|
|
646 memcpy (data, XSTRING_DATA (prefix), len);
|
|
|
647 p = data + len;
|
|
|
648
|
|
|
649 /* VAL is created by adding 6 characters to PREFIX. The first three
|
|
|
650 are the PID of this process, in base 64, and the second three are
|
|
442
|
651 a pseudo-random number seeded from process startup time. This
|
|
|
652 ensures 262144 unique file names per PID per PREFIX per machine. */
|
|
|
653
|
|
|
654 {
|
|
|
655 unsigned int pid = (unsigned int) getpid ();
|
|
|
656 *p++ = tbl[(pid >> 0) & 63];
|
|
|
657 *p++ = tbl[(pid >> 6) & 63];
|
|
|
658 *p++ = tbl[(pid >> 12) & 63];
|
|
|
659 }
|
|
428
|
660
|
|
|
661 /* Here we try to minimize useless stat'ing when this function is
|
|
|
662 invoked many times successively with the same PREFIX. We achieve
|
|
442
|
663 this by using a very pseudo-random number generator to generate
|
|
|
664 file names unique to this process, with a very long cycle. */
|
|
428
|
665
|
|
|
666 while (1)
|
|
|
667 {
|
|
|
668 struct stat ignored;
|
|
442
|
669
|
|
|
670 p[0] = tbl[(temp_name_rand >> 0) & 63];
|
|
|
671 p[1] = tbl[(temp_name_rand >> 6) & 63];
|
|
|
672 p[2] = tbl[(temp_name_rand >> 12) & 63];
|
|
428
|
673
|
|
|
674 /* Poor man's congruential RN generator. Replace with ++count
|
|
|
675 for debugging. */
|
|
442
|
676 temp_name_rand += 25229;
|
|
|
677 temp_name_rand %= 225307;
|
|
428
|
678
|
|
|
679 QUIT;
|
|
|
680
|
|
442
|
681 if (xemacs_stat ((const char *) data, &ignored) < 0)
|
|
428
|
682 {
|
|
|
683 /* We want to return only if errno is ENOENT. */
|
|
|
684 if (errno == ENOENT)
|
|
|
685 return val;
|
|
|
686
|
|
|
687 /* The error here is dubious, but there is little else we
|
|
|
688 can do. The alternatives are to return nil, which is
|
|
|
689 as bad as (and in many cases worse than) throwing the
|
|
|
690 error, or to ignore the error, which will likely result
|
|
|
691 in inflooping. */
|
|
|
692 report_file_error ("Cannot create temporary name for prefix",
|
|
563
|
693 prefix);
|
|
428
|
694 return Qnil; /* not reached */
|
|
|
695 }
|
|
|
696 }
|
|
|
697 }
|
|
|
698
|
|
|
699
|
|
|
700 DEFUN ("expand-file-name", Fexpand_file_name, 1, 2, 0, /*
|
|
|
701 Convert filename NAME to absolute, and canonicalize it.
|
|
|
702 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
|
|
|
703 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing,
|
|
444
|
704 the current buffer's value of `default-directory' is used.
|
|
428
|
705 File name components that are `.' are removed, and
|
|
|
706 so are file name components followed by `..', along with the `..' itself;
|
|
|
707 note that these simplifications are done without checking the resulting
|
|
|
708 file names in the file system.
|
|
|
709 An initial `~/' expands to your home directory.
|
|
|
710 An initial `~USER/' expands to USER's home directory.
|
|
|
711 See also the function `substitute-in-file-name'.
|
|
|
712 */
|
|
|
713 (name, default_directory))
|
|
|
714 {
|
|
446
|
715 /* This function can GC. GC-checked 2000-11-18 */
|
|
665
|
716 Intbyte *nm;
|
|
|
717
|
|
|
718 Intbyte *newdir, *p, *o;
|
|
428
|
719 int tlen;
|
|
665
|
720 Intbyte *target;
|
|
657
|
721 #ifdef WIN32_FILENAMES
|
|
428
|
722 int drive = 0;
|
|
|
723 int collapse_newdir = 1;
|
|
657
|
724 #endif
|
|
|
725 #ifndef WIN32_NATIVE
|
|
428
|
726 struct passwd *pw;
|
|
657
|
727 #endif /* WIN32_FILENAMES */
|
|
428
|
728 int length;
|
|
446
|
729 Lisp_Object handler = Qnil;
|
|
442
|
730 #ifdef CYGWIN
|
|
428
|
731 char *user;
|
|
|
732 #endif
|
|
446
|
733 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
442
|
734
|
|
|
735 /* both of these get set below */
|
|
446
|
736 GCPRO3 (name, default_directory, handler);
|
|
428
|
737
|
|
|
738 CHECK_STRING (name);
|
|
|
739
|
|
|
740 /* If the file name has special constructs in it,
|
|
|
741 call the corresponding file handler. */
|
|
|
742 handler = Ffind_file_name_handler (name, Qexpand_file_name);
|
|
|
743 if (!NILP (handler))
|
|
446
|
744 RETURN_UNGCPRO (call3_check_string (handler, Qexpand_file_name,
|
|
|
745 name, default_directory));
|
|
428
|
746
|
|
|
747 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
|
|
|
748 if (NILP (default_directory))
|
|
|
749 default_directory = current_buffer->directory;
|
|
|
750 if (! STRINGP (default_directory))
|
|
|
751 default_directory = build_string ("/");
|
|
|
752
|
|
|
753 if (!NILP (default_directory))
|
|
|
754 {
|
|
|
755 handler = Ffind_file_name_handler (default_directory, Qexpand_file_name);
|
|
|
756 if (!NILP (handler))
|
|
446
|
757 RETURN_UNGCPRO (call3 (handler, Qexpand_file_name,
|
|
|
758 name, default_directory));
|
|
428
|
759 }
|
|
|
760
|
|
|
761 o = XSTRING_DATA (default_directory);
|
|
|
762
|
|
|
763 /* Make sure DEFAULT_DIRECTORY is properly expanded.
|
|
|
764 It would be better to do this down below where we actually use
|
|
|
765 default_directory. Unfortunately, calling Fexpand_file_name recursively
|
|
|
766 could invoke GC, and the strings might be relocated. This would
|
|
|
767 be annoying because we have pointers into strings lying around
|
|
|
768 that would need adjusting, and people would add new pointers to
|
|
|
769 the code and forget to adjust them, resulting in intermittent bugs.
|
|
|
770 Putting this call here avoids all that crud.
|
|
|
771
|
|
|
772 The EQ test avoids infinite recursion. */
|
|
|
773 if (! NILP (default_directory) && !EQ (default_directory, name)
|
|
|
774 /* Save time in some common cases - as long as default_directory
|
|
|
775 is not relative, it can be canonicalized with name below (if it
|
|
|
776 is needed at all) without requiring it to be expanded now. */
|
|
657
|
777 #ifdef WIN32_FILENAMES
|
|
442
|
778 /* Detect Windows file names with drive specifiers. */
|
|
428
|
779 && ! (IS_DRIVE (o[0]) && (IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2])))
|
|
|
780 /* Detect Windows file names in UNC format. */
|
|
|
781 && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1]))
|
|
657
|
782 #endif /* not WIN32_FILENAMES */
|
|
|
783 #ifndef WIN32_NATIVE
|
|
428
|
784 /* Detect Unix absolute file names (/... alone is not absolute on
|
|
442
|
785 Windows). */
|
|
428
|
786 && ! (IS_DIRECTORY_SEP (o[0]))
|
|
442
|
787 #endif /* not WIN32_NATIVE */
|
|
428
|
788 )
|
|
442
|
789
|
|
|
790 default_directory = Fexpand_file_name (default_directory, Qnil);
|
|
428
|
791
|
|
|
792 #ifdef FILE_SYSTEM_CASE
|
|
|
793 name = FILE_SYSTEM_CASE (name);
|
|
|
794 #endif
|
|
|
795
|
|
|
796 /* #### dmoore - this is ugly, clean this up. Looks like nm pointing
|
|
|
797 into name should be safe during all of this, though. */
|
|
|
798 nm = XSTRING_DATA (name);
|
|
|
799
|
|
657
|
800 #ifdef WIN32_FILENAMES
|
|
428
|
801 /* We will force directory separators to be either all \ or /, so make
|
|
|
802 a local copy to modify, even if there ends up being no change. */
|
|
665
|
803 nm = (Intbyte *) strcpy ((char *) alloca (strlen ((char *) nm) + 1),
|
|
664
|
804 (char *) nm);
|
|
428
|
805
|
|
|
806 /* Find and remove drive specifier if present; this makes nm absolute
|
|
|
807 even if the rest of the name appears to be relative. */
|
|
|
808 {
|
|
665
|
809 Intbyte *colon = (Intbyte *) strrchr ((char *)nm, ':');
|
|
428
|
810
|
|
|
811 if (colon)
|
|
657
|
812 {
|
|
428
|
813 /* Only recognize colon as part of drive specifier if there is a
|
|
|
814 single alphabetic character preceding the colon (and if the
|
|
|
815 character before the drive letter, if present, is a directory
|
|
|
816 separator); this is to support the remote system syntax used by
|
|
|
817 ange-ftp, and the "po:username" syntax for POP mailboxes. */
|
|
|
818 look_again:
|
|
|
819 if (nm == colon)
|
|
|
820 nm++;
|
|
|
821 else if (IS_DRIVE (colon[-1])
|
|
|
822 && (colon == nm + 1 || IS_DIRECTORY_SEP (colon[-2])))
|
|
|
823 {
|
|
|
824 drive = colon[-1];
|
|
|
825 nm = colon + 1;
|
|
|
826 }
|
|
|
827 else
|
|
|
828 {
|
|
|
829 while (--colon >= nm)
|
|
|
830 if (colon[0] == ':')
|
|
|
831 goto look_again;
|
|
|
832 }
|
|
657
|
833 }
|
|
428
|
834 }
|
|
|
835
|
|
|
836 /* If we see "c://somedir", we want to strip the first slash after the
|
|
|
837 colon when stripping the drive letter. Otherwise, this expands to
|
|
|
838 "//somedir". */
|
|
|
839 if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1]))
|
|
|
840 nm++;
|
|
657
|
841 #endif /* WIN32_FILENAMES */
|
|
428
|
842
|
|
|
843 /* If nm is absolute, look for /./ or /../ sequences; if none are
|
|
|
844 found, we can probably return right away. We will avoid allocating
|
|
|
845 a new string if name is already fully expanded. */
|
|
|
846 if (
|
|
|
847 IS_DIRECTORY_SEP (nm[0])
|
|
442
|
848 #ifdef WIN32_NATIVE
|
|
428
|
849 && (drive || IS_DIRECTORY_SEP (nm[1]))
|
|
|
850 #endif
|
|
|
851 )
|
|
|
852 {
|
|
|
853 /* If it turns out that the filename we want to return is just a
|
|
|
854 suffix of FILENAME, we don't need to go through and edit
|
|
|
855 things; we just need to construct a new string using data
|
|
|
856 starting at the middle of FILENAME. If we set lose to a
|
|
|
857 non-zero value, that means we've discovered that we can't do
|
|
|
858 that cool trick. */
|
|
|
859 int lose = 0;
|
|
|
860
|
|
|
861 p = nm;
|
|
|
862 while (*p)
|
|
|
863 {
|
|
|
864 /* Since we know the name is absolute, we can assume that each
|
|
|
865 element starts with a "/". */
|
|
|
866
|
|
|
867 /* "." and ".." are hairy. */
|
|
|
868 if (IS_DIRECTORY_SEP (p[0])
|
|
|
869 && p[1] == '.'
|
|
|
870 && (IS_DIRECTORY_SEP (p[2])
|
|
|
871 || p[2] == 0
|
|
|
872 || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3])
|
|
|
873 || p[3] == 0))))
|
|
|
874 lose = 1;
|
|
|
875 p++;
|
|
|
876 }
|
|
|
877 if (!lose)
|
|
|
878 {
|
|
657
|
879 #ifdef WIN32_FILENAMES
|
|
|
880 if (drive || IS_DIRECTORY_SEP (nm[1]))
|
|
428
|
881 {
|
|
657
|
882 /* Make sure directories are all separated with / or \ as
|
|
|
883 desired, but avoid allocation of a new string when not
|
|
|
884 required. */
|
|
|
885 CORRECT_DIR_SEPS (nm);
|
|
|
886 if (IS_DIRECTORY_SEP (nm[1]))
|
|
|
887 {
|
|
664
|
888 if (strcmp ((char *) nm, (char *) XSTRING_DATA (name)) != 0)
|
|
665
|
889 name = build_string ((CIntbyte *) nm);
|
|
657
|
890 }
|
|
|
891 /* drive must be set, so this is okay */
|
|
664
|
892 else if (strcmp ((char *) nm - 2,
|
|
|
893 (char *) XSTRING_DATA (name)) != 0)
|
|
657
|
894 {
|
|
|
895 name = make_string (nm - 2, p - nm + 2);
|
|
|
896 XSTRING_DATA (name)[0] = DRIVE_LETTER (drive);
|
|
|
897 XSTRING_DATA (name)[1] = ':';
|
|
|
898 }
|
|
|
899 RETURN_UNGCPRO (name);
|
|
428
|
900 }
|
|
657
|
901 #endif /* not WIN32_FILENAMES */
|
|
|
902 #ifndef WIN32_NATIVE
|
|
428
|
903 if (nm == XSTRING_DATA (name))
|
|
442
|
904 RETURN_UNGCPRO (name);
|
|
|
905 RETURN_UNGCPRO (build_string ((char *) nm));
|
|
|
906 #endif /* not WIN32_NATIVE */
|
|
428
|
907 }
|
|
|
908 }
|
|
|
909
|
|
|
910 /* At this point, nm might or might not be an absolute file name. We
|
|
|
911 need to expand ~ or ~user if present, otherwise prefix nm with
|
|
|
912 default_directory if nm is not absolute, and finally collapse /./
|
|
|
913 and /foo/../ sequences.
|
|
|
914
|
|
|
915 We set newdir to be the appropriate prefix if one is needed:
|
|
|
916 - the relevant user directory if nm starts with ~ or ~user
|
|
|
917 - the specified drive's working dir (DOS/NT only) if nm does not
|
|
|
918 start with /
|
|
|
919 - the value of default_directory.
|
|
|
920
|
|
|
921 Note that these prefixes are not guaranteed to be absolute (except
|
|
|
922 for the working dir of a drive). Therefore, to ensure we always
|
|
|
923 return an absolute name, if the final prefix is not absolute we
|
|
|
924 append it to the current working directory. */
|
|
|
925
|
|
|
926 newdir = 0;
|
|
|
927
|
|
|
928 if (nm[0] == '~') /* prefix ~ */
|
|
|
929 {
|
|
|
930 if (IS_DIRECTORY_SEP (nm[1])
|
|
|
931 || nm[1] == 0) /* ~ by itself */
|
|
|
932 {
|
|
440
|
933 Extbyte *newdir_external = get_home_directory ();
|
|
428
|
934
|
|
|
935 if (newdir_external == NULL)
|
|
665
|
936 newdir = (Intbyte *) "";
|
|
428
|
937 else
|
|
440
|
938 TO_INTERNAL_FORMAT (C_STRING, newdir_external,
|
|
|
939 C_STRING_ALLOCA, (* ((char **) &newdir)),
|
|
|
940 Qfile_name);
|
|
428
|
941
|
|
|
942 nm++;
|
|
657
|
943 #ifdef WIN32_FILENAMES
|
|
428
|
944 collapse_newdir = 0;
|
|
|
945 #endif
|
|
|
946 }
|
|
|
947 else /* ~user/filename */
|
|
|
948 {
|
|
|
949 for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++)
|
|
|
950 DO_NOTHING;
|
|
665
|
951 o = (Intbyte *) alloca (p - nm + 1);
|
|
428
|
952 memcpy (o, (char *) nm, p - nm);
|
|
|
953 o [p - nm] = 0;
|
|
|
954
|
|
558
|
955 /* #### While NT is single-user (for the moment) you still
|
|
|
956 can have multiple user profiles users defined, each with
|
|
|
957 its HOME. So maybe possibly we should think about handling
|
|
|
958 ~user. --ben */
|
|
|
959 #ifndef WIN32_NATIVE
|
|
442
|
960 #ifdef CYGWIN
|
|
428
|
961 if ((user = user_login_name (NULL)) != NULL)
|
|
|
962 {
|
|
|
963 /* Does the user login name match the ~name? */
|
|
|
964 if (strcmp (user, (char *) o + 1) == 0)
|
|
|
965 {
|
|
665
|
966 newdir = (Intbyte *) get_home_directory();
|
|
428
|
967 nm = p;
|
|
|
968 }
|
|
|
969 }
|
|
|
970 if (! newdir)
|
|
|
971 {
|
|
442
|
972 #endif /* CYGWIN */
|
|
428
|
973 /* Jamie reports that getpwnam() can get wedged by SIGIO/SIGALARM
|
|
|
974 occurring in it. (It can call select()). */
|
|
|
975 slow_down_interrupts ();
|
|
|
976 pw = (struct passwd *) getpwnam ((char *) o + 1);
|
|
|
977 speed_up_interrupts ();
|
|
|
978 if (pw)
|
|
|
979 {
|
|
665
|
980 newdir = (Intbyte *) pw -> pw_dir;
|
|
428
|
981 nm = p;
|
|
|
982 }
|
|
442
|
983 #ifdef CYGWIN
|
|
428
|
984 }
|
|
|
985 #endif
|
|
442
|
986 #endif /* not WIN32_NATIVE */
|
|
428
|
987
|
|
|
988 /* If we don't find a user of that name, leave the name
|
|
|
989 unchanged; don't move nm forward to p. */
|
|
|
990 }
|
|
|
991 }
|
|
|
992
|
|
657
|
993 #ifdef WIN32_FILENAMES
|
|
428
|
994 /* On DOS and Windows, nm is absolute if a drive name was specified;
|
|
|
995 use the drive's current directory as the prefix if needed. */
|
|
|
996 if (!newdir && drive)
|
|
|
997 {
|
|
657
|
998 #ifdef WIN32_NATIVE
|
|
428
|
999 /* Get default directory if needed to make nm absolute. */
|
|
|
1000 if (!IS_DIRECTORY_SEP (nm[0]))
|
|
|
1001 {
|
|
665
|
1002 newdir = (Intbyte *) alloca (MAXPATHLEN + 1);
|
|
442
|
1003 if (!_getdcwd (toupper (drive) - 'A' + 1, newdir, MAXPATHLEN))
|
|
428
|
1004 newdir = NULL;
|
|
|
1005 }
|
|
657
|
1006 #endif /* WIN32_NATIVE */
|
|
428
|
1007 if (!newdir)
|
|
|
1008 {
|
|
|
1009 /* Either nm starts with /, or drive isn't mounted. */
|
|
665
|
1010 newdir = (Intbyte *) alloca (4);
|
|
428
|
1011 newdir[0] = DRIVE_LETTER (drive);
|
|
|
1012 newdir[1] = ':';
|
|
|
1013 newdir[2] = '/';
|
|
|
1014 newdir[3] = 0;
|
|
|
1015 }
|
|
|
1016 }
|
|
657
|
1017 #endif /* WIN32_FILENAMES */
|
|
428
|
1018
|
|
|
1019 /* Finally, if no prefix has been specified and nm is not absolute,
|
|
|
1020 then it must be expanded relative to default_directory. */
|
|
|
1021
|
|
|
1022 if (1
|
|
442
|
1023 #ifndef WIN32_NATIVE
|
|
428
|
1024 /* /... alone is not absolute on DOS and Windows. */
|
|
|
1025 && !IS_DIRECTORY_SEP (nm[0])
|
|
657
|
1026 #endif
|
|
|
1027 #ifdef WIN32_FILENAMES
|
|
428
|
1028 && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1]))
|
|
|
1029 #endif
|
|
|
1030 && !newdir)
|
|
|
1031 {
|
|
|
1032 newdir = XSTRING_DATA (default_directory);
|
|
|
1033 }
|
|
|
1034
|
|
657
|
1035 #ifdef WIN32_FILENAMES
|
|
428
|
1036 if (newdir)
|
|
|
1037 {
|
|
|
1038 /* First ensure newdir is an absolute name. */
|
|
|
1039 if (
|
|
442
|
1040 /* Detect Windows file names with drive specifiers. */
|
|
428
|
1041 ! (IS_DRIVE (newdir[0])
|
|
|
1042 && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2]))
|
|
|
1043 /* Detect Windows file names in UNC format. */
|
|
|
1044 && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1]))
|
|
|
1045 /* Detect drive spec by itself */
|
|
|
1046 && ! (IS_DEVICE_SEP (newdir[1]) && newdir[2] == 0)
|
|
657
|
1047 /* Detect unix format. */
|
|
|
1048 #ifndef WIN32_NATIVE
|
|
|
1049 && ! (IS_DIRECTORY_SEP (newdir[0]))
|
|
|
1050 #endif
|
|
428
|
1051 )
|
|
|
1052 {
|
|
|
1053 /* Effectively, let newdir be (expand-file-name newdir cwd).
|
|
|
1054 Because of the admonition against calling expand-file-name
|
|
|
1055 when we have pointers into lisp strings, we accomplish this
|
|
|
1056 indirectly by prepending newdir to nm if necessary, and using
|
|
|
1057 cwd (or the wd of newdir's drive) as the new newdir. */
|
|
|
1058
|
|
|
1059 if (IS_DRIVE (newdir[0]) && newdir[1] == ':')
|
|
|
1060 {
|
|
|
1061 drive = newdir[0];
|
|
|
1062 newdir += 2;
|
|
|
1063 }
|
|
|
1064 if (!IS_DIRECTORY_SEP (nm[0]))
|
|
|
1065 {
|
|
665
|
1066 Intbyte *tmp = (Intbyte *) alloca (strlen ((char *) newdir) +
|
|
664
|
1067 strlen ((char *) nm) + 2);
|
|
|
1068 file_name_as_directory ((char *) tmp, (char *) newdir);
|
|
|
1069 strcat ((char *) tmp, (char *) nm);
|
|
428
|
1070 nm = tmp;
|
|
|
1071 }
|
|
665
|
1072 newdir = (Intbyte *) alloca (MAXPATHLEN + 1);
|
|
428
|
1073 if (drive)
|
|
|
1074 {
|
|
657
|
1075 #ifdef WIN32_NATIVE
|
|
442
|
1076 if (!_getdcwd (toupper (drive) - 'A' + 1, newdir, MAXPATHLEN))
|
|
657
|
1077 #endif
|
|
665
|
1078 newdir = (Intbyte *) "/";
|
|
428
|
1079 }
|
|
|
1080 else
|
|
664
|
1081 getcwd ((char *) newdir, MAXPATHLEN);
|
|
428
|
1082 }
|
|
|
1083
|
|
|
1084 /* Strip off drive name from prefix, if present. */
|
|
|
1085 if (IS_DRIVE (newdir[0]) && newdir[1] == ':')
|
|
|
1086 {
|
|
|
1087 drive = newdir[0];
|
|
|
1088 newdir += 2;
|
|
|
1089 }
|
|
|
1090
|
|
|
1091 /* Keep only a prefix from newdir if nm starts with slash
|
|
|
1092 (/ /server/share for UNC, nothing otherwise). */
|
|
657
|
1093 if (IS_DIRECTORY_SEP (nm[0])
|
|
|
1094 #ifndef WIN32_NATIVE
|
|
|
1095 && IS_DIRECTORY_SEP (nm[1])
|
|
|
1096 #endif
|
|
|
1097 && collapse_newdir)
|
|
428
|
1098 {
|
|
|
1099 if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1]))
|
|
|
1100 {
|
|
664
|
1101 newdir =
|
|
665
|
1102 (Intbyte *)
|
|
664
|
1103 strcpy ((char *) alloca (strlen ((char *) newdir) + 1),
|
|
|
1104 (char *) newdir);
|
|
428
|
1105 p = newdir + 2;
|
|
|
1106 while (*p && !IS_DIRECTORY_SEP (*p)) p++;
|
|
|
1107 p++;
|
|
|
1108 while (*p && !IS_DIRECTORY_SEP (*p)) p++;
|
|
|
1109 *p = 0;
|
|
|
1110 }
|
|
|
1111 else
|
|
665
|
1112 newdir = (Intbyte *) "";
|
|
428
|
1113 }
|
|
|
1114 }
|
|
657
|
1115 #endif /* WIN32_FILENAMES */
|
|
428
|
1116
|
|
|
1117 if (newdir)
|
|
|
1118 {
|
|
|
1119 /* Get rid of any slash at the end of newdir, unless newdir is
|
|
|
1120 just // (an incomplete UNC name). */
|
|
|
1121 length = strlen ((char *) newdir);
|
|
|
1122 if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1])
|
|
657
|
1123 #ifdef WIN32_FILENAMES
|
|
428
|
1124 && !(length == 2 && IS_DIRECTORY_SEP (newdir[0]))
|
|
|
1125 #endif
|
|
|
1126 )
|
|
|
1127 {
|
|
665
|
1128 Intbyte *temp = (Intbyte *) alloca (length);
|
|
428
|
1129 memcpy (temp, newdir, length - 1);
|
|
|
1130 temp[length - 1] = 0;
|
|
|
1131 newdir = temp;
|
|
|
1132 }
|
|
|
1133 tlen = length + 1;
|
|
|
1134 }
|
|
|
1135 else
|
|
|
1136 tlen = 0;
|
|
|
1137
|
|
|
1138 /* Now concatenate the directory and name to new space in the stack frame */
|
|
|
1139 tlen += strlen ((char *) nm) + 1;
|
|
657
|
1140 #ifdef WIN32_FILENAMES
|
|
428
|
1141 /* Add reserved space for drive name. (The Microsoft x86 compiler
|
|
|
1142 produces incorrect code if the following two lines are combined.) */
|
|
665
|
1143 target = (Intbyte *) alloca (tlen + 2);
|
|
428
|
1144 target += 2;
|
|
657
|
1145 #else /* not WIN32_FILENAMES */
|
|
665
|
1146 target = (Intbyte *) alloca (tlen);
|
|
657
|
1147 #endif /* not WIN32_FILENAMES */
|
|
428
|
1148 *target = 0;
|
|
|
1149
|
|
|
1150 if (newdir)
|
|
|
1151 {
|
|
|
1152 if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0]))
|
|
|
1153 strcpy ((char *) target, (char *) newdir);
|
|
|
1154 else
|
|
|
1155 file_name_as_directory ((char *) target, (char *) newdir);
|
|
|
1156 }
|
|
|
1157
|
|
|
1158 strcat ((char *) target, (char *) nm);
|
|
|
1159
|
|
|
1160 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
|
|
|
1161
|
|
|
1162 /* Now canonicalize by removing /. and /foo/.. if they appear. */
|
|
|
1163
|
|
|
1164 p = target;
|
|
|
1165 o = target;
|
|
|
1166
|
|
|
1167 while (*p)
|
|
|
1168 {
|
|
|
1169 if (!IS_DIRECTORY_SEP (*p))
|
|
|
1170 {
|
|
|
1171 *o++ = *p++;
|
|
|
1172 }
|
|
|
1173 else if (IS_DIRECTORY_SEP (p[0])
|
|
|
1174 && p[1] == '.'
|
|
|
1175 && (IS_DIRECTORY_SEP (p[2])
|
|
|
1176 || p[2] == 0))
|
|
|
1177 {
|
|
|
1178 /* If "/." is the entire filename, keep the "/". Otherwise,
|
|
|
1179 just delete the whole "/.". */
|
|
|
1180 if (o == target && p[2] == '\0')
|
|
|
1181 *o++ = *p;
|
|
|
1182 p += 2;
|
|
|
1183 }
|
|
|
1184 else if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && p[2] == '.'
|
|
|
1185 /* `/../' is the "superroot" on certain file systems. */
|
|
|
1186 && o != target
|
|
|
1187 && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0))
|
|
|
1188 {
|
|
|
1189 while (o != target && (--o) && !IS_DIRECTORY_SEP (*o))
|
|
|
1190 ;
|
|
|
1191 /* Keep initial / only if this is the whole name. */
|
|
|
1192 if (o == target && IS_ANY_SEP (*o) && p[3] == 0)
|
|
|
1193 ++o;
|
|
|
1194 p += 3;
|
|
|
1195 }
|
|
657
|
1196 #ifdef WIN32_FILENAMES
|
|
428
|
1197 /* if drive is set, we're not dealing with an UNC, so
|
|
|
1198 multiple dir-seps are redundant (and reportedly cause trouble
|
|
|
1199 under win95) */
|
|
|
1200 else if (drive && IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1]))
|
|
|
1201 ++p;
|
|
|
1202 #endif
|
|
|
1203 else
|
|
|
1204 {
|
|
|
1205 *o++ = *p++;
|
|
|
1206 }
|
|
|
1207 }
|
|
|
1208
|
|
657
|
1209 #ifdef WIN32_FILENAMES
|
|
428
|
1210 /* At last, set drive name, except for network file name. */
|
|
|
1211 if (drive)
|
|
|
1212 {
|
|
|
1213 target -= 2;
|
|
|
1214 target[0] = DRIVE_LETTER (drive);
|
|
|
1215 target[1] = ':';
|
|
|
1216 }
|
|
657
|
1217 #ifdef WIN32_NATIVE
|
|
428
|
1218 else
|
|
|
1219 {
|
|
|
1220 assert (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]));
|
|
|
1221 }
|
|
657
|
1222 #endif
|
|
428
|
1223 CORRECT_DIR_SEPS (target);
|
|
657
|
1224 #endif /* WIN32_FILENAMES */
|
|
442
|
1225
|
|
|
1226 RETURN_UNGCPRO (make_string (target, o - target));
|
|
428
|
1227 }
|
|
|
1228
|
|
|
1229 DEFUN ("file-truename", Ffile_truename, 1, 2, 0, /*
|
|
444
|
1230 Return the canonical name of FILENAME.
|
|
|
1231 Second arg DEFAULT is directory to start with if FILENAME is relative
|
|
428
|
1232 (does not start with slash); if DEFAULT is nil or missing,
|
|
444
|
1233 the current buffer's value of `default-directory' is used.
|
|
428
|
1234 No component of the resulting pathname will be a symbolic link, as
|
|
|
1235 in the realpath() function.
|
|
|
1236 */
|
|
|
1237 (filename, default_))
|
|
|
1238 {
|
|
442
|
1239 /* This function can GC. GC checked 2000-07-28 ben. */
|
|
428
|
1240 Lisp_Object expanded_name;
|
|
|
1241 struct gcpro gcpro1;
|
|
|
1242
|
|
|
1243 CHECK_STRING (filename);
|
|
|
1244
|
|
|
1245 expanded_name = Fexpand_file_name (filename, default_);
|
|
|
1246
|
|
|
1247 if (!STRINGP (expanded_name))
|
|
|
1248 return Qnil;
|
|
|
1249
|
|
|
1250 GCPRO1 (expanded_name);
|
|
442
|
1251
|
|
|
1252 {
|
|
|
1253 Lisp_Object handler =
|
|
|
1254 Ffind_file_name_handler (expanded_name, Qfile_truename);
|
|
|
1255
|
|
|
1256 if (!NILP (handler))
|
|
|
1257 RETURN_UNGCPRO
|
|
|
1258 (call2_check_string (handler, Qfile_truename, expanded_name));
|
|
|
1259 }
|
|
428
|
1260
|
|
|
1261 {
|
|
|
1262 char resolved_path[MAXPATHLEN];
|
|
|
1263 Extbyte *path;
|
|
|
1264 Extbyte *p;
|
|
665
|
1265 Bytecount elen;
|
|
440
|
1266
|
|
|
1267 TO_EXTERNAL_FORMAT (LISP_STRING, expanded_name,
|
|
|
1268 ALLOCA, (path, elen),
|
|
|
1269 Qfile_name);
|
|
428
|
1270 p = path;
|
|
|
1271 if (elen > MAXPATHLEN)
|
|
|
1272 goto toolong;
|
|
442
|
1273
|
|
428
|
1274 /* Try doing it all at once. */
|
|
|
1275 /* !! Does realpath() Mule-encapsulate?
|
|
|
1276 Answer: Nope! So we do it above */
|
|
|
1277 if (!xrealpath ((char *) path, resolved_path))
|
|
|
1278 {
|
|
|
1279 /* Didn't resolve it -- have to do it one component at a time. */
|
|
|
1280 /* "realpath" is a typically useless, stupid un*x piece of crap.
|
|
|
1281 It claims to return a useful value in the "error" case, but since
|
|
|
1282 there is no indication provided of how far along the pathname
|
|
|
1283 the function went before erring, there is no way to use the
|
|
442
|
1284 partial result returned. What a piece of junk.
|
|
|
1285
|
|
|
1286 The above comment refers to historical versions of
|
|
|
1287 realpath(). The Unix98 specs state:
|
|
|
1288
|
|
|
1289 "On successful completion, realpath() returns a
|
|
|
1290 pointer to the resolved name. Otherwise, realpath()
|
|
|
1291 returns a null pointer and sets errno to indicate the
|
|
|
1292 error, and the contents of the buffer pointed to by
|
|
|
1293 resolved_name are undefined."
|
|
|
1294
|
|
|
1295 Since we depend on undocumented semantics of various system realpath()s,
|
|
|
1296 we just use our own version in realpath.c. */
|
|
428
|
1297 for (;;)
|
|
|
1298 {
|
|
446
|
1299 Extbyte *pos;
|
|
|
1300
|
|
657
|
1301 #ifdef WIN32_FILENAMES
|
|
446
|
1302 if (IS_DRIVE (p[0]) && IS_DEVICE_SEP (p[1])
|
|
|
1303 && IS_DIRECTORY_SEP (p[2]))
|
|
|
1304 /* don't test c: on windows */
|
|
|
1305 p = p+2;
|
|
|
1306 else if (IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1]))
|
|
|
1307 /* start after // */
|
|
|
1308 p = p+1;
|
|
|
1309 #endif
|
|
|
1310 for (pos = p + 1; pos < path + elen; pos++)
|
|
|
1311 if (IS_DIRECTORY_SEP (*pos))
|
|
|
1312 {
|
|
|
1313 *(p = pos) = 0;
|
|
|
1314 break;
|
|
|
1315 }
|
|
|
1316 if (p != pos)
|
|
|
1317 p = 0;
|
|
428
|
1318
|
|
|
1319 if (xrealpath ((char *) path, resolved_path))
|
|
|
1320 {
|
|
|
1321 if (p)
|
|
446
|
1322 *p = DIRECTORY_SEP;
|
|
428
|
1323 else
|
|
|
1324 break;
|
|
|
1325
|
|
|
1326 }
|
|
|
1327 else if (errno == ENOENT || errno == EACCES)
|
|
|
1328 {
|
|
|
1329 /* Failed on this component. Just tack on the rest of
|
|
|
1330 the string and we are done. */
|
|
|
1331 int rlen = strlen (resolved_path);
|
|
|
1332
|
|
|
1333 /* "On failure, it returns NULL, sets errno to indicate
|
|
|
1334 the error, and places in resolved_path the absolute pathname
|
|
|
1335 of the path component which could not be resolved." */
|
|
442
|
1336
|
|
|
1337 if (p)
|
|
428
|
1338 {
|
|
|
1339 int plen = elen - (p - path);
|
|
|
1340
|
|
446
|
1341 if (rlen > 1 && IS_DIRECTORY_SEP (resolved_path[rlen - 1]))
|
|
428
|
1342 rlen = rlen - 1;
|
|
|
1343
|
|
|
1344 if (plen + rlen + 1 > countof (resolved_path))
|
|
|
1345 goto toolong;
|
|
|
1346
|
|
446
|
1347 resolved_path[rlen] = DIRECTORY_SEP;
|
|
428
|
1348 memcpy (resolved_path + rlen + 1, p + 1, plen + 1 - 1);
|
|
|
1349 }
|
|
|
1350 break;
|
|
|
1351 }
|
|
|
1352 else
|
|
|
1353 goto lose;
|
|
|
1354 }
|
|
|
1355 }
|
|
|
1356
|
|
|
1357 {
|
|
442
|
1358 Lisp_Object resolved_name;
|
|
428
|
1359 int rlen = strlen (resolved_path);
|
|
446
|
1360 if (elen > 0 && IS_DIRECTORY_SEP (XSTRING_BYTE (expanded_name, elen - 1))
|
|
|
1361 && !(rlen > 0 && IS_DIRECTORY_SEP (resolved_path[rlen - 1])))
|
|
428
|
1362 {
|
|
|
1363 if (rlen + 1 > countof (resolved_path))
|
|
|
1364 goto toolong;
|
|
446
|
1365 resolved_path[rlen++] = DIRECTORY_SEP;
|
|
442
|
1366 resolved_path[rlen] = '\0';
|
|
428
|
1367 }
|
|
442
|
1368 TO_INTERNAL_FORMAT (DATA, (resolved_path, rlen),
|
|
|
1369 LISP_STRING, resolved_name,
|
|
|
1370 Qfile_name);
|
|
|
1371 RETURN_UNGCPRO (resolved_name);
|
|
428
|
1372 }
|
|
|
1373
|
|
|
1374 toolong:
|
|
|
1375 errno = ENAMETOOLONG;
|
|
|
1376 goto lose;
|
|
|
1377 lose:
|
|
563
|
1378 report_file_error ("Finding truename", expanded_name);
|
|
428
|
1379 }
|
|
442
|
1380 RETURN_UNGCPRO (Qnil);
|
|
428
|
1381 }
|
|
|
1382
|
|
|
1383
|
|
|
1384 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, 1, 1, 0, /*
|
|
|
1385 Substitute environment variables referred to in FILENAME.
|
|
|
1386 `$FOO' where FOO is an environment variable name means to substitute
|
|
|
1387 the value of that variable. The variable name should be terminated
|
|
444
|
1388 with a character, not a letter, digit or underscore; otherwise, enclose
|
|
428
|
1389 the entire variable name in braces.
|
|
|
1390 If `/~' appears, all of FILENAME through that `/' is discarded.
|
|
|
1391 */
|
|
444
|
1392 (filename))
|
|
428
|
1393 {
|
|
442
|
1394 /* This function can GC. GC checked 2000-07-28 ben. */
|
|
665
|
1395 Intbyte *nm;
|
|
|
1396
|
|
|
1397 Intbyte *s, *p, *o, *x, *endp;
|
|
|
1398 Intbyte *target = 0;
|
|
428
|
1399 int total = 0;
|
|
|
1400 int substituted = 0;
|
|
665
|
1401 Intbyte *xnm;
|
|
428
|
1402 Lisp_Object handler;
|
|
|
1403
|
|
444
|
1404 CHECK_STRING (filename);
|
|
428
|
1405
|
|
|
1406 /* If the file name has special constructs in it,
|
|
|
1407 call the corresponding file handler. */
|
|
444
|
1408 handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name);
|
|
428
|
1409 if (!NILP (handler))
|
|
|
1410 return call2_check_string_or_nil (handler, Qsubstitute_in_file_name,
|
|
444
|
1411 filename);
|
|
|
1412
|
|
|
1413 nm = XSTRING_DATA (filename);
|
|
|
1414 endp = nm + XSTRING_LENGTH (filename);
|
|
428
|
1415
|
|
|
1416 /* If /~ or // appears, discard everything through first slash. */
|
|
|
1417
|
|
|
1418 for (p = nm; p != endp; p++)
|
|
|
1419 {
|
|
|
1420 if ((p[0] == '~'
|
|
657
|
1421 #if defined (WIN32_FILENAMES)
|
|
440
|
1422 /* // at start of file name is meaningful in WindowsNT systems */
|
|
428
|
1423 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != nm)
|
|
657
|
1424 #else /* not (WIN32_FILENAMES) */
|
|
428
|
1425 || IS_DIRECTORY_SEP (p[0])
|
|
657
|
1426 #endif /* not (WIN32_FILENAMES) */
|
|
428
|
1427 )
|
|
|
1428 && p != nm
|
|
|
1429 && (IS_DIRECTORY_SEP (p[-1])))
|
|
|
1430 {
|
|
|
1431 nm = p;
|
|
|
1432 substituted = 1;
|
|
|
1433 }
|
|
657
|
1434 #ifdef WIN32_FILENAMES
|
|
428
|
1435 /* see comment in expand-file-name about drive specifiers */
|
|
|
1436 else if (IS_DRIVE (p[0]) && p[1] == ':'
|
|
|
1437 && p > nm && IS_DIRECTORY_SEP (p[-1]))
|
|
|
1438 {
|
|
|
1439 nm = p;
|
|
|
1440 substituted = 1;
|
|
|
1441 }
|
|
657
|
1442 #endif /* WIN32_FILENAMES */
|
|
428
|
1443 }
|
|
|
1444
|
|
|
1445 /* See if any variables are substituted into the string
|
|
|
1446 and find the total length of their values in `total' */
|
|
|
1447
|
|
|
1448 for (p = nm; p != endp;)
|
|
|
1449 if (*p != '$')
|
|
|
1450 p++;
|
|
|
1451 else
|
|
|
1452 {
|
|
|
1453 p++;
|
|
|
1454 if (p == endp)
|
|
|
1455 goto badsubst;
|
|
|
1456 else if (*p == '$')
|
|
|
1457 {
|
|
|
1458 /* "$$" means a single "$" */
|
|
|
1459 p++;
|
|
|
1460 total -= 1;
|
|
|
1461 substituted = 1;
|
|
|
1462 continue;
|
|
|
1463 }
|
|
|
1464 else if (*p == '{')
|
|
|
1465 {
|
|
|
1466 o = ++p;
|
|
|
1467 while (p != endp && *p != '}') p++;
|
|
|
1468 if (*p != '}') goto missingclose;
|
|
|
1469 s = p;
|
|
|
1470 }
|
|
|
1471 else
|
|
|
1472 {
|
|
|
1473 o = p;
|
|
|
1474 while (p != endp && (isalnum (*p) || *p == '_')) p++;
|
|
|
1475 s = p;
|
|
|
1476 }
|
|
|
1477
|
|
|
1478 /* Copy out the variable name */
|
|
665
|
1479 target = (Intbyte *) alloca (s - o + 1);
|
|
428
|
1480 strncpy ((char *) target, (char *) o, s - o);
|
|
|
1481 target[s - o] = 0;
|
|
442
|
1482 #ifdef WIN32_NATIVE
|
|
428
|
1483 strupr (target); /* $home == $HOME etc. */
|
|
442
|
1484 #endif /* WIN32_NATIVE */
|
|
428
|
1485
|
|
|
1486 /* Get variable value */
|
|
665
|
1487 o = (Intbyte *) egetenv ((char *) target);
|
|
428
|
1488 if (!o) goto badvar;
|
|
|
1489 total += strlen ((char *) o);
|
|
|
1490 substituted = 1;
|
|
|
1491 }
|
|
|
1492
|
|
|
1493 if (!substituted)
|
|
444
|
1494 return filename;
|
|
|
1495
|
|
|
1496 /* If substitution required, recopy the filename and do it */
|
|
428
|
1497 /* Make space in stack frame for the new copy */
|
|
665
|
1498 xnm = (Intbyte *) alloca (XSTRING_LENGTH (filename) + total + 1);
|
|
428
|
1499 x = xnm;
|
|
|
1500
|
|
|
1501 /* Copy the rest of the name through, replacing $ constructs with values */
|
|
|
1502 for (p = nm; *p;)
|
|
|
1503 if (*p != '$')
|
|
|
1504 *x++ = *p++;
|
|
|
1505 else
|
|
|
1506 {
|
|
|
1507 p++;
|
|
|
1508 if (p == endp)
|
|
|
1509 goto badsubst;
|
|
|
1510 else if (*p == '$')
|
|
|
1511 {
|
|
|
1512 *x++ = *p++;
|
|
|
1513 continue;
|
|
|
1514 }
|
|
|
1515 else if (*p == '{')
|
|
|
1516 {
|
|
|
1517 o = ++p;
|
|
|
1518 while (p != endp && *p != '}') p++;
|
|
|
1519 if (*p != '}') goto missingclose;
|
|
|
1520 s = p++;
|
|
|
1521 }
|
|
|
1522 else
|
|
|
1523 {
|
|
|
1524 o = p;
|
|
|
1525 while (p != endp && (isalnum (*p) || *p == '_')) p++;
|
|
|
1526 s = p;
|
|
|
1527 }
|
|
|
1528
|
|
|
1529 /* Copy out the variable name */
|
|
665
|
1530 target = (Intbyte *) alloca (s - o + 1);
|
|
428
|
1531 strncpy ((char *) target, (char *) o, s - o);
|
|
|
1532 target[s - o] = 0;
|
|
442
|
1533 #ifdef WIN32_NATIVE
|
|
428
|
1534 strupr (target); /* $home == $HOME etc. */
|
|
442
|
1535 #endif /* WIN32_NATIVE */
|
|
428
|
1536
|
|
|
1537 /* Get variable value */
|
|
665
|
1538 o = (Intbyte *) egetenv ((char *) target);
|
|
428
|
1539 if (!o)
|
|
|
1540 goto badvar;
|
|
|
1541
|
|
|
1542 strcpy ((char *) x, (char *) o);
|
|
|
1543 x += strlen ((char *) o);
|
|
|
1544 }
|
|
|
1545
|
|
|
1546 *x = 0;
|
|
|
1547
|
|
|
1548 /* If /~ or // appears, discard everything through first slash. */
|
|
|
1549
|
|
|
1550 for (p = xnm; p != x; p++)
|
|
|
1551 if ((p[0] == '~'
|
|
657
|
1552 #if defined (WIN32_FILENAMES)
|
|
428
|
1553 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != xnm)
|
|
657
|
1554 #else /* not WIN32_FILENAMES */
|
|
428
|
1555 || IS_DIRECTORY_SEP (p[0])
|
|
657
|
1556 #endif /* not WIN32_FILENAMES */
|
|
428
|
1557 )
|
|
|
1558 /* don't do p[-1] if that would go off the beginning --jwz */
|
|
|
1559 && p != nm && p > xnm && IS_DIRECTORY_SEP (p[-1]))
|
|
|
1560 xnm = p;
|
|
657
|
1561 #ifdef WIN32_FILENAMES
|
|
428
|
1562 else if (IS_DRIVE (p[0]) && p[1] == ':'
|
|
|
1563 && p > nm && IS_DIRECTORY_SEP (p[-1]))
|
|
|
1564 xnm = p;
|
|
|
1565 #endif
|
|
|
1566
|
|
|
1567 return make_string (xnm, x - xnm);
|
|
|
1568
|
|
|
1569 badsubst:
|
|
444
|
1570 syntax_error ("Bad format environment-variable substitution", filename);
|
|
428
|
1571 missingclose:
|
|
442
|
1572 syntax_error ("Missing \"}\" in environment-variable substitution",
|
|
444
|
1573 filename);
|
|
428
|
1574 badvar:
|
|
442
|
1575 syntax_error_2 ("Substituting nonexistent environment variable",
|
|
444
|
1576 filename, build_string ((char *) target));
|
|
428
|
1577
|
|
|
1578 /* NOTREACHED */
|
|
|
1579 return Qnil; /* suppress compiler warning */
|
|
|
1580 }
|
|
|
1581
|
|
|
1582 /* A slightly faster and more convenient way to get
|
|
|
1583 (directory-file-name (expand-file-name FOO)). */
|
|
|
1584
|
|
|
1585 Lisp_Object
|
|
|
1586 expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir)
|
|
|
1587 {
|
|
442
|
1588 /* This function can call Lisp. GC checked 2000-07-28 ben */
|
|
428
|
1589 Lisp_Object abspath;
|
|
|
1590 struct gcpro gcpro1;
|
|
|
1591
|
|
|
1592 abspath = Fexpand_file_name (filename, defdir);
|
|
|
1593 GCPRO1 (abspath);
|
|
|
1594 /* Remove final slash, if any (unless path is root).
|
|
|
1595 stat behaves differently depending! */
|
|
|
1596 if (XSTRING_LENGTH (abspath) > 1
|
|
|
1597 && IS_DIRECTORY_SEP (XSTRING_BYTE (abspath, XSTRING_LENGTH (abspath) - 1))
|
|
|
1598 && !IS_DEVICE_SEP (XSTRING_BYTE (abspath, XSTRING_LENGTH (abspath) - 2)))
|
|
|
1599 /* We cannot take shortcuts; they might be wrong for magic file names. */
|
|
|
1600 abspath = Fdirectory_file_name (abspath);
|
|
|
1601 UNGCPRO;
|
|
|
1602 return abspath;
|
|
|
1603 }
|
|
|
1604
|
|
|
1605 /* Signal an error if the file ABSNAME already exists.
|
|
|
1606 If INTERACTIVE is nonzero, ask the user whether to proceed,
|
|
|
1607 and bypass the error if the user says to go ahead.
|
|
|
1608 QUERYSTRING is a name for the action that is being considered
|
|
|
1609 to alter the file.
|
|
|
1610 *STATPTR is used to store the stat information if the file exists.
|
|
|
1611 If the file does not exist, STATPTR->st_mode is set to 0. */
|
|
|
1612
|
|
|
1613 static void
|
|
442
|
1614 barf_or_query_if_file_exists (Lisp_Object absname, const char *querystring,
|
|
428
|
1615 int interactive, struct stat *statptr)
|
|
|
1616 {
|
|
442
|
1617 /* This function can call Lisp. GC checked 2000-07-28 ben */
|
|
428
|
1618 struct stat statbuf;
|
|
|
1619
|
|
|
1620 /* stat is a good way to tell whether the file exists,
|
|
|
1621 regardless of what access permissions it has. */
|
|
442
|
1622 if (xemacs_stat ((char *) XSTRING_DATA (absname), &statbuf) >= 0)
|
|
428
|
1623 {
|
|
|
1624 Lisp_Object tem;
|
|
|
1625
|
|
|
1626 if (interactive)
|
|
|
1627 {
|
|
|
1628 Lisp_Object prompt;
|
|
|
1629 struct gcpro gcpro1;
|
|
|
1630
|
|
|
1631 prompt = emacs_doprnt_string_c
|
|
665
|
1632 ((const Intbyte *) GETTEXT ("File %s already exists; %s anyway? "),
|
|
428
|
1633 Qnil, -1, XSTRING_DATA (absname),
|
|
|
1634 GETTEXT (querystring));
|
|
|
1635
|
|
|
1636 GCPRO1 (prompt);
|
|
|
1637 tem = call1 (Qyes_or_no_p, prompt);
|
|
|
1638 UNGCPRO;
|
|
|
1639 }
|
|
|
1640 else
|
|
|
1641 tem = Qnil;
|
|
|
1642
|
|
|
1643 if (NILP (tem))
|
|
|
1644 Fsignal (Qfile_already_exists,
|
|
|
1645 list2 (build_translated_string ("File already exists"),
|
|
|
1646 absname));
|
|
|
1647 if (statptr)
|
|
|
1648 *statptr = statbuf;
|
|
|
1649 }
|
|
|
1650 else
|
|
|
1651 {
|
|
|
1652 if (statptr)
|
|
|
1653 statptr->st_mode = 0;
|
|
|
1654 }
|
|
|
1655 return;
|
|
|
1656 }
|
|
|
1657
|
|
|
1658 DEFUN ("copy-file", Fcopy_file, 2, 4,
|
|
|
1659 "fCopy file: \nFCopy %s to file: \np\nP", /*
|
|
444
|
1660 Copy FILENAME to NEWNAME. Both args must be strings.
|
|
428
|
1661 Signals a `file-already-exists' error if file NEWNAME already exists,
|
|
|
1662 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.
|
|
|
1663 A number as third arg means request confirmation if NEWNAME already exists.
|
|
|
1664 This is what happens in interactive use with M-x.
|
|
|
1665 Fourth arg KEEP-TIME non-nil means give the new file the same
|
|
|
1666 last-modified time as the old one. (This works on only some systems.)
|
|
|
1667 A prefix arg makes KEEP-TIME non-nil.
|
|
|
1668 */
|
|
|
1669 (filename, newname, ok_if_already_exists, keep_time))
|
|
|
1670 {
|
|
442
|
1671 /* This function can call Lisp. GC checked 2000-07-28 ben */
|
|
428
|
1672 int ifd, ofd, n;
|
|
|
1673 char buf[16 * 1024];
|
|
|
1674 struct stat st, out_st;
|
|
|
1675 Lisp_Object handler;
|
|
|
1676 int speccount = specpdl_depth ();
|
|
|
1677 struct gcpro gcpro1, gcpro2;
|
|
|
1678 /* Lisp_Object args[6]; */
|
|
|
1679 int input_file_statable_p;
|
|
|
1680
|
|
|
1681 GCPRO2 (filename, newname);
|
|
|
1682 CHECK_STRING (filename);
|
|
|
1683 CHECK_STRING (newname);
|
|
|
1684 filename = Fexpand_file_name (filename, Qnil);
|
|
|
1685 newname = Fexpand_file_name (newname, Qnil);
|
|
|
1686
|
|
|
1687 /* If the input file name has special constructs in it,
|
|
|
1688 call the corresponding file handler. */
|
|
|
1689 handler = Ffind_file_name_handler (filename, Qcopy_file);
|
|
|
1690 /* Likewise for output file name. */
|
|
|
1691 if (NILP (handler))
|
|
|
1692 handler = Ffind_file_name_handler (newname, Qcopy_file);
|
|
|
1693 if (!NILP (handler))
|
|
|
1694 {
|
|
|
1695 UNGCPRO;
|
|
|
1696 return call5 (handler, Qcopy_file, filename, newname,
|
|
|
1697 ok_if_already_exists, keep_time);
|
|
|
1698 }
|
|
|
1699
|
|
|
1700 /* When second argument is a directory, copy the file into it.
|
|
|
1701 (copy-file "foo" "bar/") == (copy-file "foo" "bar/foo")
|
|
|
1702 */
|
|
|
1703 if (!NILP (Ffile_directory_p (newname)))
|
|
|
1704 {
|
|
|
1705 Lisp_Object args[3];
|
|
|
1706 struct gcpro ngcpro1;
|
|
|
1707 int i = 1;
|
|
|
1708
|
|
|
1709 args[0] = newname;
|
|
|
1710 args[1] = Qnil; args[2] = Qnil;
|
|
|
1711 NGCPRO1 (*args);
|
|
|
1712 ngcpro1.nvars = 3;
|
|
442
|
1713 if (!IS_DIRECTORY_SEP (XSTRING_BYTE (newname,
|
|
|
1714 XSTRING_LENGTH (newname) - 1)))
|
|
|
1715
|
|
|
1716 args[i++] = Fchar_to_string (Vdirectory_sep_char);
|
|
428
|
1717 args[i++] = Ffile_name_nondirectory (filename);
|
|
|
1718 newname = Fconcat (i, args);
|
|
|
1719 NUNGCPRO;
|
|
|
1720 }
|
|
|
1721
|
|
|
1722 if (NILP (ok_if_already_exists)
|
|
|
1723 || INTP (ok_if_already_exists))
|
|
|
1724 barf_or_query_if_file_exists (newname, "copy to it",
|
|
|
1725 INTP (ok_if_already_exists), &out_st);
|
|
442
|
1726 else if (xemacs_stat ((const char *) XSTRING_DATA (newname), &out_st) < 0)
|
|
428
|
1727 out_st.st_mode = 0;
|
|
|
1728
|
|
|
1729 ifd = interruptible_open ((char *) XSTRING_DATA (filename), O_RDONLY | OPEN_BINARY, 0);
|
|
|
1730 if (ifd < 0)
|
|
563
|
1731 report_file_error ("Opening input file", filename);
|
|
428
|
1732
|
|
|
1733 record_unwind_protect (close_file_unwind, make_int (ifd));
|
|
|
1734
|
|
|
1735 /* We can only copy regular files and symbolic links. Other files are not
|
|
|
1736 copyable by us. */
|
|
|
1737 input_file_statable_p = (fstat (ifd, &st) >= 0);
|
|
|
1738
|
|
442
|
1739 #ifndef WIN32_NATIVE
|
|
428
|
1740 if (out_st.st_mode != 0
|
|
|
1741 && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino)
|
|
|
1742 {
|
|
|
1743 errno = 0;
|
|
|
1744 report_file_error ("Input and output files are the same",
|
|
563
|
1745 list3 (Qunbound, filename, newname));
|
|
428
|
1746 }
|
|
|
1747 #endif
|
|
|
1748
|
|
|
1749 #if defined (S_ISREG) && defined (S_ISLNK)
|
|
|
1750 if (input_file_statable_p)
|
|
|
1751 {
|
|
|
1752 if (!(S_ISREG (st.st_mode))
|
|
|
1753 /* XEmacs: have to allow S_ISCHR in order to copy /dev/null */
|
|
|
1754 #ifdef S_ISCHR
|
|
|
1755 && !(S_ISCHR (st.st_mode))
|
|
|
1756 #endif
|
|
|
1757 && !(S_ISLNK (st.st_mode)))
|
|
|
1758 {
|
|
|
1759 #if defined (EISDIR)
|
|
|
1760 /* Get a better looking error message. */
|
|
|
1761 errno = EISDIR;
|
|
|
1762 #endif /* EISDIR */
|
|
563
|
1763 report_file_error ("Non-regular file", filename);
|
|
428
|
1764 }
|
|
|
1765 }
|
|
|
1766 #endif /* S_ISREG && S_ISLNK */
|
|
|
1767
|
|
|
1768 ofd = open( (char *) XSTRING_DATA (newname),
|
|
|
1769 O_WRONLY | O_CREAT | O_TRUNC | OPEN_BINARY, CREAT_MODE);
|
|
|
1770 if (ofd < 0)
|
|
563
|
1771 report_file_error ("Opening output file", newname);
|
|
428
|
1772
|
|
|
1773 {
|
|
|
1774 Lisp_Object ofd_locative = noseeum_cons (make_int (ofd), Qnil);
|
|
|
1775
|
|
|
1776 record_unwind_protect (close_file_unwind, ofd_locative);
|
|
|
1777
|
|
|
1778 while ((n = read_allowing_quit (ifd, buf, sizeof (buf))) > 0)
|
|
|
1779 {
|
|
|
1780 if (write_allowing_quit (ofd, buf, n) != n)
|
|
563
|
1781 report_file_error ("I/O error", newname);
|
|
428
|
1782 }
|
|
|
1783
|
|
|
1784 /* Closing the output clobbers the file times on some systems. */
|
|
|
1785 if (close (ofd) < 0)
|
|
563
|
1786 report_file_error ("I/O error", newname);
|
|
428
|
1787
|
|
|
1788 if (input_file_statable_p)
|
|
|
1789 {
|
|
442
|
1790 if (!NILP (keep_time))
|
|
|
1791 {
|
|
|
1792 EMACS_TIME atime, mtime;
|
|
|
1793 EMACS_SET_SECS_USECS (atime, st.st_atime, 0);
|
|
|
1794 EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0);
|
|
592
|
1795 if (set_file_times (newname, atime, mtime))
|
|
|
1796 report_file_error ("I/O error", list1 (newname));
|
|
442
|
1797 }
|
|
|
1798 chmod ((const char *) XSTRING_DATA (newname),
|
|
|
1799 st.st_mode & 07777);
|
|
428
|
1800 }
|
|
|
1801
|
|
|
1802 /* We'll close it by hand */
|
|
|
1803 XCAR (ofd_locative) = Qnil;
|
|
|
1804
|
|
|
1805 /* Close ifd */
|
|
|
1806 unbind_to (speccount, Qnil);
|
|
|
1807 }
|
|
|
1808
|
|
|
1809 UNGCPRO;
|
|
|
1810 return Qnil;
|
|
|
1811 }
|
|
|
1812
|
|
|
1813 DEFUN ("make-directory-internal", Fmake_directory_internal, 1, 1, 0, /*
|
|
|
1814 Create a directory. One argument, a file name string.
|
|
|
1815 */
|
|
|
1816 (dirname_))
|
|
|
1817 {
|
|
|
1818 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1819 char dir [MAXPATHLEN];
|
|
|
1820 Lisp_Object handler;
|
|
|
1821 struct gcpro gcpro1;
|
|
|
1822
|
|
|
1823 CHECK_STRING (dirname_);
|
|
|
1824 dirname_ = Fexpand_file_name (dirname_, Qnil);
|
|
|
1825
|
|
|
1826 GCPRO1 (dirname_);
|
|
|
1827 handler = Ffind_file_name_handler (dirname_, Qmake_directory_internal);
|
|
|
1828 UNGCPRO;
|
|
|
1829 if (!NILP (handler))
|
|
|
1830 return (call2 (handler, Qmake_directory_internal, dirname_));
|
|
|
1831
|
|
|
1832 if (XSTRING_LENGTH (dirname_) > (Bytecount) (sizeof (dir) - 1))
|
|
|
1833 {
|
|
|
1834 return Fsignal (Qfile_error,
|
|
|
1835 list3 (build_translated_string ("Creating directory"),
|
|
442
|
1836 build_translated_string ("pathname too long"),
|
|
428
|
1837 dirname_));
|
|
|
1838 }
|
|
|
1839 strncpy (dir, (char *) XSTRING_DATA (dirname_),
|
|
|
1840 XSTRING_LENGTH (dirname_) + 1);
|
|
|
1841
|
|
|
1842 if (dir [XSTRING_LENGTH (dirname_) - 1] == '/')
|
|
|
1843 dir [XSTRING_LENGTH (dirname_) - 1] = 0;
|
|
|
1844
|
|
|
1845 if (mkdir (dir, 0777) != 0)
|
|
563
|
1846 report_file_error ("Creating directory", dirname_);
|
|
428
|
1847
|
|
|
1848 return Qnil;
|
|
|
1849 }
|
|
|
1850
|
|
|
1851 DEFUN ("delete-directory", Fdelete_directory, 1, 1, "FDelete directory: ", /*
|
|
|
1852 Delete a directory. One argument, a file name or directory name string.
|
|
|
1853 */
|
|
|
1854 (dirname_))
|
|
|
1855 {
|
|
|
1856 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1857 Lisp_Object handler;
|
|
|
1858 struct gcpro gcpro1;
|
|
|
1859
|
|
|
1860 CHECK_STRING (dirname_);
|
|
|
1861
|
|
|
1862 GCPRO1 (dirname_);
|
|
|
1863 dirname_ = Fexpand_file_name (dirname_, Qnil);
|
|
|
1864 dirname_ = Fdirectory_file_name (dirname_);
|
|
|
1865
|
|
|
1866 handler = Ffind_file_name_handler (dirname_, Qdelete_directory);
|
|
|
1867 UNGCPRO;
|
|
|
1868 if (!NILP (handler))
|
|
|
1869 return (call2 (handler, Qdelete_directory, dirname_));
|
|
|
1870
|
|
|
1871 if (rmdir ((char *) XSTRING_DATA (dirname_)) != 0)
|
|
563
|
1872 report_file_error ("Removing directory", dirname_);
|
|
428
|
1873
|
|
|
1874 return Qnil;
|
|
|
1875 }
|
|
|
1876
|
|
|
1877 DEFUN ("delete-file", Fdelete_file, 1, 1, "fDelete file: ", /*
|
|
442
|
1878 Delete the file named FILENAME (a string).
|
|
|
1879 If FILENAME has multiple names, it continues to exist with the other names.
|
|
428
|
1880 */
|
|
|
1881 (filename))
|
|
|
1882 {
|
|
|
1883 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1884 Lisp_Object handler;
|
|
|
1885 struct gcpro gcpro1;
|
|
|
1886
|
|
|
1887 CHECK_STRING (filename);
|
|
|
1888 filename = Fexpand_file_name (filename, Qnil);
|
|
|
1889
|
|
|
1890 GCPRO1 (filename);
|
|
|
1891 handler = Ffind_file_name_handler (filename, Qdelete_file);
|
|
|
1892 UNGCPRO;
|
|
|
1893 if (!NILP (handler))
|
|
|
1894 return call2 (handler, Qdelete_file, filename);
|
|
|
1895
|
|
|
1896 if (0 > unlink ((char *) XSTRING_DATA (filename)))
|
|
563
|
1897 report_file_error ("Removing old name", filename);
|
|
428
|
1898 return Qnil;
|
|
|
1899 }
|
|
|
1900
|
|
|
1901 static Lisp_Object
|
|
|
1902 internal_delete_file_1 (Lisp_Object ignore, Lisp_Object ignore2)
|
|
|
1903 {
|
|
|
1904 return Qt;
|
|
|
1905 }
|
|
|
1906
|
|
|
1907 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
|
|
|
1908
|
|
|
1909 int
|
|
|
1910 internal_delete_file (Lisp_Object filename)
|
|
|
1911 {
|
|
|
1912 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1913 return NILP (condition_case_1 (Qt, Fdelete_file, filename,
|
|
|
1914 internal_delete_file_1, Qnil));
|
|
|
1915 }
|
|
|
1916
|
|
|
1917 DEFUN ("rename-file", Frename_file, 2, 3,
|
|
|
1918 "fRename file: \nFRename %s to file: \np", /*
|
|
444
|
1919 Rename FILENAME as NEWNAME. Both args must be strings.
|
|
|
1920 If file has names other than FILENAME, it continues to have those names.
|
|
428
|
1921 Signals a `file-already-exists' error if a file NEWNAME already exists
|
|
|
1922 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
|
|
|
1923 A number as third arg means request confirmation if NEWNAME already exists.
|
|
|
1924 This is what happens in interactive use with M-x.
|
|
|
1925 */
|
|
|
1926 (filename, newname, ok_if_already_exists))
|
|
|
1927 {
|
|
|
1928 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1929 Lisp_Object handler;
|
|
|
1930 struct gcpro gcpro1, gcpro2;
|
|
|
1931
|
|
|
1932 GCPRO2 (filename, newname);
|
|
|
1933 CHECK_STRING (filename);
|
|
|
1934 CHECK_STRING (newname);
|
|
|
1935 filename = Fexpand_file_name (filename, Qnil);
|
|
|
1936 newname = Fexpand_file_name (newname, Qnil);
|
|
|
1937
|
|
|
1938 /* If the file name has special constructs in it,
|
|
|
1939 call the corresponding file handler. */
|
|
|
1940 handler = Ffind_file_name_handler (filename, Qrename_file);
|
|
|
1941 if (NILP (handler))
|
|
|
1942 handler = Ffind_file_name_handler (newname, Qrename_file);
|
|
|
1943 if (!NILP (handler))
|
|
|
1944 {
|
|
|
1945 UNGCPRO;
|
|
|
1946 return call4 (handler, Qrename_file,
|
|
|
1947 filename, newname, ok_if_already_exists);
|
|
|
1948 }
|
|
|
1949
|
|
|
1950 /* When second argument is a directory, rename the file into it.
|
|
|
1951 (rename-file "foo" "bar/") == (rename-file "foo" "bar/foo")
|
|
|
1952 */
|
|
|
1953 if (!NILP (Ffile_directory_p (newname)))
|
|
|
1954 {
|
|
|
1955 Lisp_Object args[3];
|
|
|
1956 struct gcpro ngcpro1;
|
|
|
1957 int i = 1;
|
|
|
1958
|
|
|
1959 args[0] = newname;
|
|
|
1960 args[1] = Qnil; args[2] = Qnil;
|
|
|
1961 NGCPRO1 (*args);
|
|
|
1962 ngcpro1.nvars = 3;
|
|
|
1963 if (XSTRING_BYTE (newname, XSTRING_LENGTH (newname) - 1) != '/')
|
|
|
1964 args[i++] = build_string ("/");
|
|
|
1965 args[i++] = Ffile_name_nondirectory (filename);
|
|
|
1966 newname = Fconcat (i, args);
|
|
|
1967 NUNGCPRO;
|
|
|
1968 }
|
|
|
1969
|
|
|
1970 if (NILP (ok_if_already_exists)
|
|
|
1971 || INTP (ok_if_already_exists))
|
|
|
1972 barf_or_query_if_file_exists (newname, "rename to it",
|
|
|
1973 INTP (ok_if_already_exists), 0);
|
|
|
1974
|
|
|
1975 /* Syncing with FSF 19.34.6 note: FSF does not have conditional code for
|
|
442
|
1976 WIN32_NATIVE here; I've removed it. --marcpa */
|
|
|
1977
|
|
|
1978 /* We have configure check for rename() and emulate using
|
|
|
1979 link()/unlink() if necessary. */
|
|
428
|
1980 if (0 > rename ((char *) XSTRING_DATA (filename),
|
|
|
1981 (char *) XSTRING_DATA (newname)))
|
|
|
1982 {
|
|
|
1983 if (errno == EXDEV)
|
|
|
1984 {
|
|
|
1985 Fcopy_file (filename, newname,
|
|
|
1986 /* We have already prompted if it was an integer,
|
|
|
1987 so don't have copy-file prompt again. */
|
|
|
1988 (NILP (ok_if_already_exists) ? Qnil : Qt),
|
|
|
1989 Qt);
|
|
|
1990 Fdelete_file (filename);
|
|
|
1991 }
|
|
|
1992 else
|
|
|
1993 {
|
|
563
|
1994 report_file_error ("Renaming", list3 (Qunbound, filename, newname));
|
|
428
|
1995 }
|
|
|
1996 }
|
|
|
1997 UNGCPRO;
|
|
|
1998 return Qnil;
|
|
|
1999 }
|
|
|
2000
|
|
|
2001 DEFUN ("add-name-to-file", Fadd_name_to_file, 2, 3,
|
|
|
2002 "fAdd name to file: \nFName to add to %s: \np", /*
|
|
444
|
2003 Give FILENAME additional name NEWNAME. Both args must be strings.
|
|
428
|
2004 Signals a `file-already-exists' error if a file NEWNAME already exists
|
|
|
2005 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
|
|
|
2006 A number as third arg means request confirmation if NEWNAME already exists.
|
|
|
2007 This is what happens in interactive use with M-x.
|
|
|
2008 */
|
|
|
2009 (filename, newname, ok_if_already_exists))
|
|
|
2010 {
|
|
|
2011 /* This function can GC. GC checked 1997.04.06. */
|
|
|
2012 Lisp_Object handler;
|
|
|
2013 struct gcpro gcpro1, gcpro2;
|
|
|
2014
|
|
|
2015 GCPRO2 (filename, newname);
|
|
|
2016 CHECK_STRING (filename);
|
|
|
2017 CHECK_STRING (newname);
|
|
|
2018 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2019 newname = Fexpand_file_name (newname, Qnil);
|
|
|
2020
|
|
|
2021 /* If the file name has special constructs in it,
|
|
|
2022 call the corresponding file handler. */
|
|
|
2023 handler = Ffind_file_name_handler (filename, Qadd_name_to_file);
|
|
|
2024 if (!NILP (handler))
|
|
|
2025 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename,
|
|
|
2026 newname, ok_if_already_exists));
|
|
|
2027
|
|
|
2028 /* If the new name has special constructs in it,
|
|
|
2029 call the corresponding file handler. */
|
|
|
2030 handler = Ffind_file_name_handler (newname, Qadd_name_to_file);
|
|
|
2031 if (!NILP (handler))
|
|
|
2032 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename,
|
|
|
2033 newname, ok_if_already_exists));
|
|
|
2034
|
|
|
2035 if (NILP (ok_if_already_exists)
|
|
|
2036 || INTP (ok_if_already_exists))
|
|
|
2037 barf_or_query_if_file_exists (newname, "make it a new name",
|
|
|
2038 INTP (ok_if_already_exists), 0);
|
|
|
2039 /* Syncing with FSF 19.34.6 note: FSF does not report a file error
|
|
|
2040 on NT here. --marcpa */
|
|
|
2041 /* But FSF #defines link as sys_link which is supplied in nt.c. We can't do
|
|
|
2042 that because sysfile.h defines sys_link depending on ENCAPSULATE_LINK.
|
|
|
2043 Reverted to previous behavior pending a working fix. (jhar) */
|
|
442
|
2044 #if defined(WIN32_NATIVE)
|
|
428
|
2045 /* Windows does not support this operation. */
|
|
563
|
2046 signal_error_2 (Qunimplemented, "Adding new name", filename, newname);
|
|
442
|
2047 #else /* not defined(WIN32_NATIVE) */
|
|
428
|
2048
|
|
|
2049 unlink ((char *) XSTRING_DATA (newname));
|
|
|
2050 if (0 > link ((char *) XSTRING_DATA (filename),
|
|
|
2051 (char *) XSTRING_DATA (newname)))
|
|
|
2052 {
|
|
|
2053 report_file_error ("Adding new name",
|
|
563
|
2054 list3 (Qunbound, filename, newname));
|
|
428
|
2055 }
|
|
442
|
2056 #endif /* defined(WIN32_NATIVE) */
|
|
428
|
2057
|
|
|
2058 UNGCPRO;
|
|
|
2059 return Qnil;
|
|
|
2060 }
|
|
|
2061
|
|
|
2062 DEFUN ("make-symbolic-link", Fmake_symbolic_link, 2, 3,
|
|
|
2063 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", /*
|
|
|
2064 Make a symbolic link to FILENAME, named LINKNAME. Both args strings.
|
|
|
2065 Signals a `file-already-exists' error if a file LINKNAME already exists
|
|
|
2066 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
|
|
|
2067 A number as third arg means request confirmation if LINKNAME already exists.
|
|
|
2068 This happens for interactive use with M-x.
|
|
|
2069 */
|
|
|
2070 (filename, linkname, ok_if_already_exists))
|
|
|
2071 {
|
|
|
2072 /* This function can GC. GC checked 1997.06.04. */
|
|
442
|
2073 /* XEmacs change: run handlers even if local machine doesn't have symlinks */
|
|
428
|
2074 Lisp_Object handler;
|
|
|
2075 struct gcpro gcpro1, gcpro2;
|
|
|
2076
|
|
|
2077 GCPRO2 (filename, linkname);
|
|
|
2078 CHECK_STRING (filename);
|
|
|
2079 CHECK_STRING (linkname);
|
|
|
2080 /* If the link target has a ~, we must expand it to get
|
|
|
2081 a truly valid file name. Otherwise, do not expand;
|
|
|
2082 we want to permit links to relative file names. */
|
|
|
2083 if (XSTRING_BYTE (filename, 0) == '~')
|
|
|
2084 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2085 linkname = Fexpand_file_name (linkname, Qnil);
|
|
|
2086
|
|
|
2087 /* If the file name has special constructs in it,
|
|
|
2088 call the corresponding file handler. */
|
|
|
2089 handler = Ffind_file_name_handler (filename, Qmake_symbolic_link);
|
|
|
2090 if (!NILP (handler))
|
|
|
2091 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname,
|
|
|
2092 ok_if_already_exists));
|
|
|
2093
|
|
|
2094 /* If the new link name has special constructs in it,
|
|
|
2095 call the corresponding file handler. */
|
|
|
2096 handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link);
|
|
|
2097 if (!NILP (handler))
|
|
|
2098 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename,
|
|
|
2099 linkname, ok_if_already_exists));
|
|
|
2100
|
|
442
|
2101 #ifdef S_IFLNK
|
|
428
|
2102 if (NILP (ok_if_already_exists)
|
|
|
2103 || INTP (ok_if_already_exists))
|
|
|
2104 barf_or_query_if_file_exists (linkname, "make it a link",
|
|
|
2105 INTP (ok_if_already_exists), 0);
|
|
|
2106
|
|
|
2107 unlink ((char *) XSTRING_DATA (linkname));
|
|
|
2108 if (0 > symlink ((char *) XSTRING_DATA (filename),
|
|
|
2109 (char *) XSTRING_DATA (linkname)))
|
|
|
2110 {
|
|
|
2111 report_file_error ("Making symbolic link",
|
|
563
|
2112 list3 (Qunbound, filename, linkname));
|
|
428
|
2113 }
|
|
442
|
2114 #endif /* S_IFLNK */
|
|
|
2115
|
|
428
|
2116 UNGCPRO;
|
|
|
2117 return Qnil;
|
|
|
2118 }
|
|
|
2119
|
|
|
2120 #ifdef HPUX_NET
|
|
|
2121
|
|
|
2122 DEFUN ("sysnetunam", Fsysnetunam, 2, 2, 0, /*
|
|
|
2123 Open a network connection to PATH using LOGIN as the login string.
|
|
|
2124 */
|
|
|
2125 (path, login))
|
|
|
2126 {
|
|
|
2127 int netresult;
|
|
440
|
2128 const char *path_ext;
|
|
|
2129 const char *login_ext;
|
|
428
|
2130
|
|
|
2131 CHECK_STRING (path);
|
|
|
2132 CHECK_STRING (login);
|
|
|
2133
|
|
|
2134 /* netunam, being a strange-o system call only used once, is not
|
|
|
2135 encapsulated. */
|
|
440
|
2136
|
|
442
|
2137 LISP_STRING_TO_EXTERNAL (path, path_ext, Qfile_name);
|
|
|
2138 LISP_STRING_TO_EXTERNAL (login, login_ext, Qnative);
|
|
440
|
2139
|
|
|
2140 netresult = netunam (path_ext, login_ext);
|
|
|
2141
|
|
|
2142 return netresult == -1 ? Qnil : Qt;
|
|
428
|
2143 }
|
|
|
2144 #endif /* HPUX_NET */
|
|
|
2145
|
|
|
2146 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, 1, 1, 0, /*
|
|
|
2147 Return t if file FILENAME specifies an absolute path name.
|
|
|
2148 On Unix, this is a name starting with a `/' or a `~'.
|
|
|
2149 */
|
|
|
2150 (filename))
|
|
|
2151 {
|
|
|
2152 /* This function does not GC */
|
|
665
|
2153 Intbyte *ptr;
|
|
428
|
2154
|
|
|
2155 CHECK_STRING (filename);
|
|
|
2156 ptr = XSTRING_DATA (filename);
|
|
|
2157 return (IS_DIRECTORY_SEP (*ptr) || *ptr == '~'
|
|
657
|
2158 #ifdef WIN32_FILENAMES
|
|
428
|
2159 || (IS_DRIVE (*ptr) && ptr[1] == ':' && IS_DIRECTORY_SEP (ptr[2]))
|
|
|
2160 #endif
|
|
|
2161 ) ? Qt : Qnil;
|
|
|
2162 }
|
|
|
2163
|
|
|
2164 /* Return nonzero if file FILENAME exists and can be executed. */
|
|
|
2165
|
|
|
2166 static int
|
|
|
2167 check_executable (char *filename)
|
|
|
2168 {
|
|
442
|
2169 #ifdef WIN32_NATIVE
|
|
428
|
2170 struct stat st;
|
|
442
|
2171 if (xemacs_stat (filename, &st) < 0)
|
|
428
|
2172 return 0;
|
|
|
2173 return ((st.st_mode & S_IEXEC) != 0);
|
|
442
|
2174 #else /* not WIN32_NATIVE */
|
|
428
|
2175 #ifdef HAVE_EACCESS
|
|
442
|
2176 return eaccess (filename, X_OK) >= 0;
|
|
428
|
2177 #else
|
|
|
2178 /* Access isn't quite right because it uses the real uid
|
|
|
2179 and we really want to test with the effective uid.
|
|
|
2180 But Unix doesn't give us a right way to do it. */
|
|
442
|
2181 return access (filename, X_OK) >= 0;
|
|
428
|
2182 #endif /* HAVE_EACCESS */
|
|
442
|
2183 #endif /* not WIN32_NATIVE */
|
|
428
|
2184 }
|
|
|
2185
|
|
|
2186 /* Return nonzero if file FILENAME exists and can be written. */
|
|
|
2187
|
|
|
2188 static int
|
|
442
|
2189 check_writable (const char *filename)
|
|
428
|
2190 {
|
|
|
2191 #ifdef HAVE_EACCESS
|
|
442
|
2192 return (eaccess (filename, W_OK) >= 0);
|
|
428
|
2193 #else
|
|
|
2194 /* Access isn't quite right because it uses the real uid
|
|
|
2195 and we really want to test with the effective uid.
|
|
|
2196 But Unix doesn't give us a right way to do it.
|
|
|
2197 Opening with O_WRONLY could work for an ordinary file,
|
|
|
2198 but would lose for directories. */
|
|
442
|
2199 return (access (filename, W_OK) >= 0);
|
|
428
|
2200 #endif
|
|
|
2201 }
|
|
|
2202
|
|
|
2203 DEFUN ("file-exists-p", Ffile_exists_p, 1, 1, 0, /*
|
|
|
2204 Return t if file FILENAME exists. (This does not mean you can read it.)
|
|
|
2205 See also `file-readable-p' and `file-attributes'.
|
|
|
2206 */
|
|
|
2207 (filename))
|
|
|
2208 {
|
|
442
|
2209 /* This function can call lisp; GC checked 2000-07-11 ben */
|
|
428
|
2210 Lisp_Object abspath;
|
|
|
2211 Lisp_Object handler;
|
|
|
2212 struct stat statbuf;
|
|
|
2213 struct gcpro gcpro1;
|
|
|
2214
|
|
|
2215 CHECK_STRING (filename);
|
|
|
2216 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2217
|
|
|
2218 /* If the file name has special constructs in it,
|
|
|
2219 call the corresponding file handler. */
|
|
|
2220 GCPRO1 (abspath);
|
|
|
2221 handler = Ffind_file_name_handler (abspath, Qfile_exists_p);
|
|
|
2222 UNGCPRO;
|
|
|
2223 if (!NILP (handler))
|
|
|
2224 return call2 (handler, Qfile_exists_p, abspath);
|
|
|
2225
|
|
442
|
2226 return xemacs_stat ((char *) XSTRING_DATA (abspath), &statbuf) >= 0 ? Qt : Qnil;
|
|
428
|
2227 }
|
|
|
2228
|
|
|
2229 DEFUN ("file-executable-p", Ffile_executable_p, 1, 1, 0, /*
|
|
|
2230 Return t if FILENAME can be executed by you.
|
|
|
2231 For a directory, this means you can access files in that directory.
|
|
|
2232 */
|
|
|
2233 (filename))
|
|
|
2234
|
|
|
2235 {
|
|
442
|
2236 /* This function can GC. GC checked 07-11-2000 ben. */
|
|
428
|
2237 Lisp_Object abspath;
|
|
|
2238 Lisp_Object handler;
|
|
|
2239 struct gcpro gcpro1;
|
|
|
2240
|
|
|
2241 CHECK_STRING (filename);
|
|
|
2242 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2243
|
|
|
2244 /* If the file name has special constructs in it,
|
|
|
2245 call the corresponding file handler. */
|
|
|
2246 GCPRO1 (abspath);
|
|
|
2247 handler = Ffind_file_name_handler (abspath, Qfile_executable_p);
|
|
|
2248 UNGCPRO;
|
|
|
2249 if (!NILP (handler))
|
|
|
2250 return call2 (handler, Qfile_executable_p, abspath);
|
|
|
2251
|
|
|
2252 return check_executable ((char *) XSTRING_DATA (abspath)) ? Qt : Qnil;
|
|
|
2253 }
|
|
|
2254
|
|
|
2255 DEFUN ("file-readable-p", Ffile_readable_p, 1, 1, 0, /*
|
|
|
2256 Return t if file FILENAME exists and you can read it.
|
|
|
2257 See also `file-exists-p' and `file-attributes'.
|
|
|
2258 */
|
|
|
2259 (filename))
|
|
|
2260 {
|
|
|
2261 /* This function can GC */
|
|
|
2262 Lisp_Object abspath = Qnil;
|
|
|
2263 Lisp_Object handler;
|
|
|
2264 struct gcpro gcpro1;
|
|
|
2265 GCPRO1 (abspath);
|
|
|
2266
|
|
|
2267 CHECK_STRING (filename);
|
|
|
2268 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2269
|
|
|
2270 /* If the file name has special constructs in it,
|
|
|
2271 call the corresponding file handler. */
|
|
|
2272 handler = Ffind_file_name_handler (abspath, Qfile_readable_p);
|
|
|
2273 if (!NILP (handler))
|
|
|
2274 RETURN_UNGCPRO (call2 (handler, Qfile_readable_p, abspath));
|
|
|
2275
|
|
657
|
2276 #if defined(WIN32_FILENAMES)
|
|
428
|
2277 /* Under MS-DOS and Windows, open does not work for directories. */
|
|
|
2278 UNGCPRO;
|
|
593
|
2279 if (access ((char *) XSTRING_DATA (abspath), 0) == 0)
|
|
428
|
2280 return Qt;
|
|
|
2281 else
|
|
|
2282 return Qnil;
|
|
657
|
2283 #else /* not WIN32_FILENAMES */
|
|
428
|
2284 {
|
|
|
2285 int desc = interruptible_open ((char *) XSTRING_DATA (abspath), O_RDONLY | OPEN_BINARY, 0);
|
|
|
2286 UNGCPRO;
|
|
|
2287 if (desc < 0)
|
|
|
2288 return Qnil;
|
|
|
2289 close (desc);
|
|
|
2290 return Qt;
|
|
|
2291 }
|
|
657
|
2292 #endif /* not WIN32_FILENAMES */
|
|
428
|
2293 }
|
|
|
2294
|
|
|
2295 /* Having this before file-symlink-p mysteriously caused it to be forgotten
|
|
|
2296 on the RT/PC. */
|
|
|
2297 DEFUN ("file-writable-p", Ffile_writable_p, 1, 1, 0, /*
|
|
|
2298 Return t if file FILENAME can be written or created by you.
|
|
|
2299 */
|
|
|
2300 (filename))
|
|
|
2301 {
|
|
|
2302 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2303 Lisp_Object abspath, dir;
|
|
|
2304 Lisp_Object handler;
|
|
|
2305 struct stat statbuf;
|
|
|
2306 struct gcpro gcpro1;
|
|
|
2307
|
|
|
2308 CHECK_STRING (filename);
|
|
|
2309 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2310
|
|
|
2311 /* If the file name has special constructs in it,
|
|
|
2312 call the corresponding file handler. */
|
|
|
2313 GCPRO1 (abspath);
|
|
|
2314 handler = Ffind_file_name_handler (abspath, Qfile_writable_p);
|
|
|
2315 UNGCPRO;
|
|
|
2316 if (!NILP (handler))
|
|
|
2317 return call2 (handler, Qfile_writable_p, abspath);
|
|
|
2318
|
|
442
|
2319 if (xemacs_stat ((char *) XSTRING_DATA (abspath), &statbuf) >= 0)
|
|
428
|
2320 return (check_writable ((char *) XSTRING_DATA (abspath))
|
|
|
2321 ? Qt : Qnil);
|
|
|
2322
|
|
|
2323
|
|
|
2324 GCPRO1 (abspath);
|
|
|
2325 dir = Ffile_name_directory (abspath);
|
|
|
2326 UNGCPRO;
|
|
|
2327 return (check_writable (!NILP (dir) ? (char *) XSTRING_DATA (dir)
|
|
|
2328 : "")
|
|
|
2329 ? Qt : Qnil);
|
|
|
2330 }
|
|
|
2331
|
|
|
2332 DEFUN ("file-symlink-p", Ffile_symlink_p, 1, 1, 0, /*
|
|
|
2333 Return non-nil if file FILENAME is the name of a symbolic link.
|
|
|
2334 The value is the name of the file to which it is linked.
|
|
|
2335 Otherwise returns nil.
|
|
|
2336 */
|
|
|
2337 (filename))
|
|
|
2338 {
|
|
|
2339 /* This function can GC. GC checked 1997.04.10. */
|
|
442
|
2340 /* XEmacs change: run handlers even if local machine doesn't have symlinks */
|
|
428
|
2341 #ifdef S_IFLNK
|
|
|
2342 char *buf;
|
|
|
2343 int bufsize;
|
|
|
2344 int valsize;
|
|
|
2345 Lisp_Object val;
|
|
442
|
2346 #endif
|
|
428
|
2347 Lisp_Object handler;
|
|
|
2348 struct gcpro gcpro1;
|
|
|
2349
|
|
|
2350 CHECK_STRING (filename);
|
|
|
2351 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2352
|
|
|
2353 /* If the file name has special constructs in it,
|
|
|
2354 call the corresponding file handler. */
|
|
|
2355 GCPRO1 (filename);
|
|
|
2356 handler = Ffind_file_name_handler (filename, Qfile_symlink_p);
|
|
|
2357 UNGCPRO;
|
|
|
2358 if (!NILP (handler))
|
|
|
2359 return call2 (handler, Qfile_symlink_p, filename);
|
|
|
2360
|
|
442
|
2361 #ifdef S_IFLNK
|
|
428
|
2362 bufsize = 100;
|
|
|
2363 while (1)
|
|
|
2364 {
|
|
|
2365 buf = xnew_array_and_zero (char, bufsize);
|
|
|
2366 valsize = readlink ((char *) XSTRING_DATA (filename),
|
|
|
2367 buf, bufsize);
|
|
|
2368 if (valsize < bufsize) break;
|
|
|
2369 /* Buffer was not long enough */
|
|
|
2370 xfree (buf);
|
|
|
2371 bufsize *= 2;
|
|
|
2372 }
|
|
|
2373 if (valsize == -1)
|
|
|
2374 {
|
|
|
2375 xfree (buf);
|
|
|
2376 return Qnil;
|
|
|
2377 }
|
|
665
|
2378 val = make_string ((Intbyte *) buf, valsize);
|
|
428
|
2379 xfree (buf);
|
|
|
2380 return val;
|
|
|
2381 #else /* not S_IFLNK */
|
|
|
2382 return Qnil;
|
|
|
2383 #endif /* not S_IFLNK */
|
|
|
2384 }
|
|
|
2385
|
|
|
2386 DEFUN ("file-directory-p", Ffile_directory_p, 1, 1, 0, /*
|
|
|
2387 Return t if file FILENAME is the name of a directory as a file.
|
|
|
2388 A directory name spec may be given instead; then the value is t
|
|
|
2389 if the directory so specified exists and really is a directory.
|
|
|
2390 */
|
|
|
2391 (filename))
|
|
|
2392 {
|
|
|
2393 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2394 Lisp_Object abspath;
|
|
|
2395 struct stat st;
|
|
|
2396 Lisp_Object handler;
|
|
|
2397 struct gcpro gcpro1;
|
|
|
2398
|
|
|
2399 GCPRO1 (current_buffer->directory);
|
|
|
2400 abspath = expand_and_dir_to_file (filename,
|
|
|
2401 current_buffer->directory);
|
|
|
2402 UNGCPRO;
|
|
|
2403
|
|
|
2404 /* If the file name has special constructs in it,
|
|
|
2405 call the corresponding file handler. */
|
|
|
2406 GCPRO1 (abspath);
|
|
|
2407 handler = Ffind_file_name_handler (abspath, Qfile_directory_p);
|
|
|
2408 UNGCPRO;
|
|
|
2409 if (!NILP (handler))
|
|
|
2410 return call2 (handler, Qfile_directory_p, abspath);
|
|
|
2411
|
|
442
|
2412 if (xemacs_stat ((char *) XSTRING_DATA (abspath), &st) < 0)
|
|
428
|
2413 return Qnil;
|
|
|
2414 return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil;
|
|
|
2415 }
|
|
|
2416
|
|
|
2417 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, 1, 1, 0, /*
|
|
|
2418 Return t if file FILENAME is the name of a directory as a file,
|
|
|
2419 and files in that directory can be opened by you. In order to use a
|
|
|
2420 directory as a buffer's current directory, this predicate must return true.
|
|
|
2421 A directory name spec may be given instead; then the value is t
|
|
|
2422 if the directory so specified exists and really is a readable and
|
|
|
2423 searchable directory.
|
|
|
2424 */
|
|
|
2425 (filename))
|
|
|
2426 {
|
|
|
2427 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2428 Lisp_Object handler;
|
|
|
2429
|
|
|
2430 /* If the file name has special constructs in it,
|
|
|
2431 call the corresponding file handler. */
|
|
|
2432 handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p);
|
|
|
2433 if (!NILP (handler))
|
|
|
2434 return call2 (handler, Qfile_accessible_directory_p,
|
|
|
2435 filename);
|
|
|
2436
|
|
442
|
2437 #if !defined(WIN32_NATIVE)
|
|
428
|
2438 if (NILP (Ffile_directory_p (filename)))
|
|
|
2439 return (Qnil);
|
|
|
2440 else
|
|
|
2441 return Ffile_executable_p (filename);
|
|
|
2442 #else
|
|
|
2443 {
|
|
|
2444 int tem;
|
|
|
2445 struct gcpro gcpro1;
|
|
|
2446 /* It's an unlikely combination, but yes we really do need to gcpro:
|
|
|
2447 Suppose that file-accessible-directory-p has no handler, but
|
|
|
2448 file-directory-p does have a handler; this handler causes a GC which
|
|
|
2449 relocates the string in `filename'; and finally file-directory-p
|
|
|
2450 returns non-nil. Then we would end up passing a garbaged string
|
|
|
2451 to file-executable-p. */
|
|
|
2452 GCPRO1 (filename);
|
|
|
2453 tem = (NILP (Ffile_directory_p (filename))
|
|
|
2454 || NILP (Ffile_executable_p (filename)));
|
|
|
2455 UNGCPRO;
|
|
|
2456 return tem ? Qnil : Qt;
|
|
|
2457 }
|
|
442
|
2458 #endif /* !defined(WIN32_NATIVE) */
|
|
428
|
2459 }
|
|
|
2460
|
|
|
2461 DEFUN ("file-regular-p", Ffile_regular_p, 1, 1, 0, /*
|
|
|
2462 Return t if file FILENAME is the name of a regular file.
|
|
|
2463 This is the sort of file that holds an ordinary stream of data bytes.
|
|
|
2464 */
|
|
|
2465 (filename))
|
|
|
2466 {
|
|
|
2467 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2468 Lisp_Object abspath;
|
|
|
2469 struct stat st;
|
|
|
2470 Lisp_Object handler;
|
|
|
2471 struct gcpro gcpro1;
|
|
|
2472
|
|
|
2473 GCPRO1 (current_buffer->directory);
|
|
|
2474 abspath = expand_and_dir_to_file (filename, current_buffer->directory);
|
|
|
2475 UNGCPRO;
|
|
|
2476
|
|
|
2477 /* If the file name has special constructs in it,
|
|
|
2478 call the corresponding file handler. */
|
|
|
2479 GCPRO1 (abspath);
|
|
|
2480 handler = Ffind_file_name_handler (abspath, Qfile_regular_p);
|
|
|
2481 UNGCPRO;
|
|
|
2482 if (!NILP (handler))
|
|
|
2483 return call2 (handler, Qfile_regular_p, abspath);
|
|
|
2484
|
|
442
|
2485 if (xemacs_stat ((char *) XSTRING_DATA (abspath), &st) < 0)
|
|
428
|
2486 return Qnil;
|
|
|
2487 return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil;
|
|
|
2488 }
|
|
|
2489
|
|
|
2490 DEFUN ("file-modes", Ffile_modes, 1, 1, 0, /*
|
|
444
|
2491 Return mode bits of file named FILENAME, as an integer.
|
|
428
|
2492 */
|
|
|
2493 (filename))
|
|
|
2494 {
|
|
|
2495 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2496 Lisp_Object abspath;
|
|
|
2497 struct stat st;
|
|
|
2498 Lisp_Object handler;
|
|
|
2499 struct gcpro gcpro1;
|
|
|
2500
|
|
|
2501 GCPRO1 (current_buffer->directory);
|
|
|
2502 abspath = expand_and_dir_to_file (filename,
|
|
|
2503 current_buffer->directory);
|
|
|
2504 UNGCPRO;
|
|
|
2505
|
|
|
2506 /* If the file name has special constructs in it,
|
|
|
2507 call the corresponding file handler. */
|
|
|
2508 GCPRO1 (abspath);
|
|
|
2509 handler = Ffind_file_name_handler (abspath, Qfile_modes);
|
|
|
2510 UNGCPRO;
|
|
|
2511 if (!NILP (handler))
|
|
|
2512 return call2 (handler, Qfile_modes, abspath);
|
|
|
2513
|
|
442
|
2514 if (xemacs_stat ((char *) XSTRING_DATA (abspath), &st) < 0)
|
|
428
|
2515 return Qnil;
|
|
|
2516 /* Syncing with FSF 19.34.6 note: not in FSF, #if 0'ed out here. */
|
|
|
2517 #if 0
|
|
442
|
2518 #ifdef WIN32_NATIVE
|
|
428
|
2519 if (check_executable (XSTRING_DATA (abspath)))
|
|
|
2520 st.st_mode |= S_IEXEC;
|
|
442
|
2521 #endif /* WIN32_NATIVE */
|
|
428
|
2522 #endif /* 0 */
|
|
|
2523
|
|
|
2524 return make_int (st.st_mode & 07777);
|
|
|
2525 }
|
|
|
2526
|
|
|
2527 DEFUN ("set-file-modes", Fset_file_modes, 2, 2, 0, /*
|
|
444
|
2528 Set mode bits of file named FILENAME to MODE (an integer).
|
|
428
|
2529 Only the 12 low bits of MODE are used.
|
|
|
2530 */
|
|
|
2531 (filename, mode))
|
|
|
2532 {
|
|
|
2533 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2534 Lisp_Object abspath;
|
|
|
2535 Lisp_Object handler;
|
|
|
2536 struct gcpro gcpro1;
|
|
|
2537
|
|
|
2538 GCPRO1 (current_buffer->directory);
|
|
|
2539 abspath = Fexpand_file_name (filename, current_buffer->directory);
|
|
|
2540 UNGCPRO;
|
|
|
2541
|
|
|
2542 CHECK_INT (mode);
|
|
|
2543
|
|
|
2544 /* If the file name has special constructs in it,
|
|
|
2545 call the corresponding file handler. */
|
|
|
2546 GCPRO1 (abspath);
|
|
|
2547 handler = Ffind_file_name_handler (abspath, Qset_file_modes);
|
|
|
2548 UNGCPRO;
|
|
|
2549 if (!NILP (handler))
|
|
|
2550 return call3 (handler, Qset_file_modes, abspath, mode);
|
|
|
2551
|
|
|
2552 if (chmod ((char *) XSTRING_DATA (abspath), XINT (mode)) < 0)
|
|
563
|
2553 report_file_error ("Doing chmod", abspath);
|
|
428
|
2554
|
|
|
2555 return Qnil;
|
|
|
2556 }
|
|
|
2557
|
|
|
2558 DEFUN ("set-default-file-modes", Fset_default_file_modes, 1, 1, 0, /*
|
|
|
2559 Set the file permission bits for newly created files.
|
|
444
|
2560 The argument MODE should be an integer; if a bit in MODE is 1,
|
|
|
2561 subsequently created files will not have the permission corresponding
|
|
|
2562 to that bit enabled. Only the low 9 bits are used.
|
|
428
|
2563 This setting is inherited by subprocesses.
|
|
|
2564 */
|
|
|
2565 (mode))
|
|
|
2566 {
|
|
|
2567 CHECK_INT (mode);
|
|
|
2568
|
|
|
2569 umask ((~ XINT (mode)) & 0777);
|
|
|
2570
|
|
|
2571 return Qnil;
|
|
|
2572 }
|
|
|
2573
|
|
|
2574 DEFUN ("default-file-modes", Fdefault_file_modes, 0, 0, 0, /*
|
|
|
2575 Return the default file protection for created files.
|
|
|
2576 The umask value determines which permissions are enabled in newly
|
|
|
2577 created files. If a permission's bit in the umask is 1, subsequently
|
|
|
2578 created files will not have that permission enabled.
|
|
|
2579 */
|
|
|
2580 ())
|
|
|
2581 {
|
|
|
2582 int mode;
|
|
|
2583
|
|
|
2584 mode = umask (0);
|
|
|
2585 umask (mode);
|
|
|
2586
|
|
|
2587 return make_int ((~ mode) & 0777);
|
|
|
2588 }
|
|
|
2589
|
|
|
2590 DEFUN ("unix-sync", Funix_sync, 0, 0, "", /*
|
|
|
2591 Tell Unix to finish all pending disk updates.
|
|
|
2592 */
|
|
|
2593 ())
|
|
|
2594 {
|
|
442
|
2595 #ifndef WIN32_NATIVE
|
|
428
|
2596 sync ();
|
|
|
2597 #endif
|
|
|
2598 return Qnil;
|
|
|
2599 }
|
|
|
2600
|
|
|
2601
|
|
|
2602 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, 2, 2, 0, /*
|
|
|
2603 Return t if file FILE1 is newer than file FILE2.
|
|
|
2604 If FILE1 does not exist, the answer is nil;
|
|
|
2605 otherwise, if FILE2 does not exist, the answer is t.
|
|
|
2606 */
|
|
|
2607 (file1, file2))
|
|
|
2608 {
|
|
|
2609 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2610 Lisp_Object abspath1, abspath2;
|
|
|
2611 struct stat st;
|
|
|
2612 int mtime1;
|
|
|
2613 Lisp_Object handler;
|
|
|
2614 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
2615
|
|
|
2616 CHECK_STRING (file1);
|
|
|
2617 CHECK_STRING (file2);
|
|
|
2618
|
|
|
2619 abspath1 = Qnil;
|
|
|
2620 abspath2 = Qnil;
|
|
|
2621
|
|
|
2622 GCPRO3 (abspath1, abspath2, current_buffer->directory);
|
|
|
2623 abspath1 = expand_and_dir_to_file (file1, current_buffer->directory);
|
|
|
2624 abspath2 = expand_and_dir_to_file (file2, current_buffer->directory);
|
|
|
2625
|
|
|
2626 /* If the file name has special constructs in it,
|
|
|
2627 call the corresponding file handler. */
|
|
|
2628 handler = Ffind_file_name_handler (abspath1, Qfile_newer_than_file_p);
|
|
|
2629 if (NILP (handler))
|
|
|
2630 handler = Ffind_file_name_handler (abspath2, Qfile_newer_than_file_p);
|
|
|
2631 UNGCPRO;
|
|
|
2632 if (!NILP (handler))
|
|
|
2633 return call3 (handler, Qfile_newer_than_file_p, abspath1,
|
|
|
2634 abspath2);
|
|
|
2635
|
|
442
|
2636 if (xemacs_stat ((char *) XSTRING_DATA (abspath1), &st) < 0)
|
|
428
|
2637 return Qnil;
|
|
|
2638
|
|
|
2639 mtime1 = st.st_mtime;
|
|
|
2640
|
|
442
|
2641 if (xemacs_stat ((char *) XSTRING_DATA (abspath2), &st) < 0)
|
|
428
|
2642 return Qt;
|
|
|
2643
|
|
|
2644 return (mtime1 > st.st_mtime) ? Qt : Qnil;
|
|
|
2645 }
|
|
|
2646
|
|
|
2647
|
|
|
2648 /* Stack sizes > 2**16 is a good way to elicit compiler bugs */
|
|
|
2649 /* #define READ_BUF_SIZE (2 << 16) */
|
|
|
2650 #define READ_BUF_SIZE (1 << 15)
|
|
|
2651
|
|
|
2652 DEFUN ("insert-file-contents-internal", Finsert_file_contents_internal,
|
|
|
2653 1, 7, 0, /*
|
|
|
2654 Insert contents of file FILENAME after point; no coding-system frobbing.
|
|
|
2655 This function is identical to `insert-file-contents' except for the
|
|
|
2656 handling of the CODESYS and USED-CODESYS arguments under
|
|
|
2657 XEmacs/Mule. (When Mule support is not present, both functions are
|
|
|
2658 identical and ignore the CODESYS and USED-CODESYS arguments.)
|
|
|
2659
|
|
|
2660 If support for Mule exists in this Emacs, the file is decoded according
|
|
|
2661 to CODESYS; if omitted, no conversion happens. If USED-CODESYS is non-nil,
|
|
|
2662 it should be a symbol, and the actual coding system that was used for the
|
|
|
2663 decoding is stored into it. It will in general be different from CODESYS
|
|
|
2664 if CODESYS specifies automatic encoding detection or end-of-line detection.
|
|
|
2665
|
|
444
|
2666 Currently START and END refer to byte positions (as opposed to character
|
|
428
|
2667 positions), even in Mule. (Fixing this is very difficult.)
|
|
|
2668 */
|
|
444
|
2669 (filename, visit, start, end, replace, codesys, used_codesys))
|
|
428
|
2670 {
|
|
|
2671 /* This function can call lisp */
|
|
|
2672 struct stat st;
|
|
|
2673 int fd;
|
|
|
2674 int saverrno = 0;
|
|
|
2675 Charcount inserted = 0;
|
|
|
2676 int speccount;
|
|
|
2677 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
2678 Lisp_Object handler = Qnil, val;
|
|
|
2679 int total;
|
|
665
|
2680 Intbyte read_buf[READ_BUF_SIZE];
|
|
428
|
2681 int mc_count;
|
|
|
2682 struct buffer *buf = current_buffer;
|
|
|
2683 Lisp_Object curbuf;
|
|
|
2684 int not_regular = 0;
|
|
|
2685
|
|
|
2686 if (buf->base_buffer && ! NILP (visit))
|
|
563
|
2687 invalid_operation ("Cannot do file visiting in an indirect buffer", Qunbound);
|
|
428
|
2688
|
|
|
2689 /* No need to call Fbarf_if_buffer_read_only() here.
|
|
|
2690 That's called in begin_multiple_change() or wherever. */
|
|
|
2691
|
|
|
2692 val = Qnil;
|
|
|
2693
|
|
|
2694 /* #### dmoore - should probably check in various places to see if
|
|
|
2695 curbuf was killed and if so signal an error? */
|
|
|
2696
|
|
|
2697 XSETBUFFER (curbuf, buf);
|
|
|
2698
|
|
|
2699 GCPRO5 (filename, val, visit, handler, curbuf);
|
|
|
2700
|
|
|
2701 mc_count = (NILP (replace)) ?
|
|
|
2702 begin_multiple_change (buf, BUF_PT (buf), BUF_PT (buf)) :
|
|
|
2703 begin_multiple_change (buf, BUF_BEG (buf), BUF_Z (buf));
|
|
|
2704
|
|
|
2705 speccount = specpdl_depth (); /* begin_multiple_change also adds
|
|
|
2706 an unwind_protect */
|
|
|
2707
|
|
|
2708 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2709
|
|
|
2710 /* If the file name has special constructs in it,
|
|
|
2711 call the corresponding file handler. */
|
|
|
2712 handler = Ffind_file_name_handler (filename, Qinsert_file_contents);
|
|
|
2713 if (!NILP (handler))
|
|
|
2714 {
|
|
|
2715 val = call6 (handler, Qinsert_file_contents, filename,
|
|
444
|
2716 visit, start, end, replace);
|
|
428
|
2717 goto handled;
|
|
|
2718 }
|
|
|
2719
|
|
|
2720 #ifdef FILE_CODING
|
|
|
2721 if (!NILP (used_codesys))
|
|
|
2722 CHECK_SYMBOL (used_codesys);
|
|
|
2723 #endif
|
|
|
2724
|
|
444
|
2725 if ( (!NILP (start) || !NILP (end)) && !NILP (visit) )
|
|
563
|
2726 invalid_operation ("Attempt to visit less than an entire file", Qunbound);
|
|
428
|
2727
|
|
|
2728 fd = -1;
|
|
|
2729
|
|
442
|
2730 if (xemacs_stat ((char *) XSTRING_DATA (filename), &st) < 0)
|
|
428
|
2731 {
|
|
|
2732 if (fd >= 0) close (fd);
|
|
|
2733 badopen:
|
|
|
2734 if (NILP (visit))
|
|
563
|
2735 report_file_error ("Opening input file", filename);
|
|
428
|
2736 st.st_mtime = -1;
|
|
|
2737 goto notfound;
|
|
|
2738 }
|
|
|
2739
|
|
|
2740 #ifdef S_IFREG
|
|
|
2741 /* Signal an error if we are accessing a non-regular file, with
|
|
444
|
2742 REPLACE, START or END being non-nil. */
|
|
428
|
2743 if (!S_ISREG (st.st_mode))
|
|
|
2744 {
|
|
|
2745 not_regular = 1;
|
|
|
2746
|
|
|
2747 if (!NILP (visit))
|
|
|
2748 goto notfound;
|
|
|
2749
|
|
444
|
2750 if (!NILP (replace) || !NILP (start) || !NILP (end))
|
|
428
|
2751 {
|
|
|
2752 end_multiple_change (buf, mc_count);
|
|
|
2753
|
|
444
|
2754 RETURN_UNGCPRO
|
|
|
2755 (Fsignal (Qfile_error,
|
|
|
2756 list2 (build_translated_string("not a regular file"),
|
|
|
2757 filename)));
|
|
428
|
2758 }
|
|
|
2759 }
|
|
|
2760 #endif /* S_IFREG */
|
|
|
2761
|
|
444
|
2762 if (!NILP (start))
|
|
|
2763 CHECK_INT (start);
|
|
428
|
2764 else
|
|
444
|
2765 start = Qzero;
|
|
428
|
2766
|
|
|
2767 if (!NILP (end))
|
|
|
2768 CHECK_INT (end);
|
|
|
2769
|
|
|
2770 if (fd < 0)
|
|
|
2771 {
|
|
|
2772 if ((fd = interruptible_open ((char *) XSTRING_DATA (filename),
|
|
|
2773 O_RDONLY | OPEN_BINARY, 0)) < 0)
|
|
|
2774 goto badopen;
|
|
|
2775 }
|
|
|
2776
|
|
|
2777 /* Replacement should preserve point as it preserves markers. */
|
|
|
2778 if (!NILP (replace))
|
|
|
2779 record_unwind_protect (restore_point_unwind, Fpoint_marker (Qnil, Qnil));
|
|
|
2780
|
|
|
2781 record_unwind_protect (close_file_unwind, make_int (fd));
|
|
|
2782
|
|
|
2783 /* Supposedly happens on VMS. */
|
|
|
2784 if (st.st_size < 0)
|
|
563
|
2785 signal_error (Qfile_error, "File size is negative", Qunbound);
|
|
428
|
2786
|
|
|
2787 if (NILP (end))
|
|
|
2788 {
|
|
|
2789 if (!not_regular)
|
|
|
2790 {
|
|
|
2791 end = make_int (st.st_size);
|
|
|
2792 if (XINT (end) != st.st_size)
|
|
563
|
2793 out_of_memory ("Maximum buffer size exceeded", Qunbound);
|
|
428
|
2794 }
|
|
|
2795 }
|
|
|
2796
|
|
|
2797 /* If requested, replace the accessible part of the buffer
|
|
|
2798 with the file contents. Avoid replacing text at the
|
|
|
2799 beginning or end of the buffer that matches the file contents;
|
|
|
2800 that preserves markers pointing to the unchanged parts. */
|
|
|
2801 #if !defined (FILE_CODING)
|
|
|
2802 /* The replace-mode code currently only works when the assumption
|
|
|
2803 'one byte == one char' holds true. This fails Mule because
|
|
|
2804 files may contain multibyte characters. It holds under Windows NT
|
|
|
2805 provided we convert CRLF into LF. */
|
|
|
2806 # define FSFMACS_SPEEDY_INSERT
|
|
|
2807 #endif /* !defined (FILE_CODING) */
|
|
|
2808
|
|
|
2809 #ifndef FSFMACS_SPEEDY_INSERT
|
|
|
2810 if (!NILP (replace))
|
|
|
2811 {
|
|
|
2812 buffer_delete_range (buf, BUF_BEG (buf), BUF_Z (buf),
|
|
|
2813 !NILP (visit) ? INSDEL_NO_LOCKING : 0);
|
|
|
2814 }
|
|
|
2815 #else /* FSFMACS_SPEEDY_INSERT */
|
|
|
2816 if (!NILP (replace))
|
|
|
2817 {
|
|
|
2818 char buffer[1 << 14];
|
|
665
|
2819 Charbpos same_at_start = BUF_BEGV (buf);
|
|
|
2820 Charbpos same_at_end = BUF_ZV (buf);
|
|
428
|
2821 int overlap;
|
|
|
2822
|
|
|
2823 /* Count how many chars at the start of the file
|
|
|
2824 match the text at the beginning of the buffer. */
|
|
|
2825 while (1)
|
|
|
2826 {
|
|
|
2827 int nread;
|
|
665
|
2828 Charbpos charbpos;
|
|
647
|
2829 nread = read_allowing_quit (fd, buffer, sizeof (buffer));
|
|
428
|
2830 if (nread < 0)
|
|
563
|
2831 report_file_error ("Reading", filename);
|
|
428
|
2832 else if (nread == 0)
|
|
|
2833 break;
|
|
665
|
2834 charbpos = 0;
|
|
|
2835 while (charbpos < nread && same_at_start < BUF_ZV (buf)
|
|
|
2836 && BUF_FETCH_CHAR (buf, same_at_start) == buffer[charbpos])
|
|
|
2837 same_at_start++, charbpos++;
|
|
428
|
2838 /* If we found a discrepancy, stop the scan.
|
|
|
2839 Otherwise loop around and scan the next bufferful. */
|
|
665
|
2840 if (charbpos != nread)
|
|
428
|
2841 break;
|
|
|
2842 }
|
|
|
2843 /* If the file matches the buffer completely,
|
|
|
2844 there's no need to replace anything. */
|
|
|
2845 if (same_at_start - BUF_BEGV (buf) == st.st_size)
|
|
|
2846 {
|
|
|
2847 close (fd);
|
|
|
2848 unbind_to (speccount, Qnil);
|
|
|
2849 /* Truncate the buffer to the size of the file. */
|
|
|
2850 buffer_delete_range (buf, same_at_start, same_at_end,
|
|
|
2851 !NILP (visit) ? INSDEL_NO_LOCKING : 0);
|
|
|
2852 goto handled;
|
|
|
2853 }
|
|
|
2854 /* Count how many chars at the end of the file
|
|
|
2855 match the text at the end of the buffer. */
|
|
|
2856 while (1)
|
|
|
2857 {
|
|
|
2858 int total_read, nread;
|
|
665
|
2859 Charbpos charbpos, curpos, trial;
|
|
428
|
2860
|
|
|
2861 /* At what file position are we now scanning? */
|
|
|
2862 curpos = st.st_size - (BUF_ZV (buf) - same_at_end);
|
|
|
2863 /* If the entire file matches the buffer tail, stop the scan. */
|
|
|
2864 if (curpos == 0)
|
|
|
2865 break;
|
|
|
2866 /* How much can we scan in the next step? */
|
|
665
|
2867 trial = min (curpos, (Charbpos) sizeof (buffer));
|
|
428
|
2868 if (lseek (fd, curpos - trial, 0) < 0)
|
|
563
|
2869 report_file_error ("Setting file position", filename);
|
|
428
|
2870
|
|
|
2871 total_read = 0;
|
|
|
2872 while (total_read < trial)
|
|
|
2873 {
|
|
|
2874 nread = read_allowing_quit (fd, buffer + total_read,
|
|
|
2875 trial - total_read);
|
|
|
2876 if (nread <= 0)
|
|
563
|
2877 report_file_error ("IO error reading file", filename);
|
|
428
|
2878 total_read += nread;
|
|
|
2879 }
|
|
|
2880 /* Scan this bufferful from the end, comparing with
|
|
|
2881 the Emacs buffer. */
|
|
665
|
2882 charbpos = total_read;
|
|
428
|
2883 /* Compare with same_at_start to avoid counting some buffer text
|
|
|
2884 as matching both at the file's beginning and at the end. */
|
|
665
|
2885 while (charbpos > 0 && same_at_end > same_at_start
|
|
428
|
2886 && BUF_FETCH_CHAR (buf, same_at_end - 1) ==
|
|
665
|
2887 buffer[charbpos - 1])
|
|
|
2888 same_at_end--, charbpos--;
|
|
428
|
2889 /* If we found a discrepancy, stop the scan.
|
|
|
2890 Otherwise loop around and scan the preceding bufferful. */
|
|
665
|
2891 if (charbpos != 0)
|
|
428
|
2892 break;
|
|
|
2893 /* If display current starts at beginning of line,
|
|
|
2894 keep it that way. */
|
|
|
2895 if (XBUFFER (XWINDOW (Fselected_window (Qnil))->buffer) == buf)
|
|
|
2896 XWINDOW (Fselected_window (Qnil))->start_at_line_beg =
|
|
|
2897 !NILP (Fbolp (make_buffer (buf)));
|
|
|
2898 }
|
|
|
2899
|
|
|
2900 /* Don't try to reuse the same piece of text twice. */
|
|
|
2901 overlap = same_at_start - BUF_BEGV (buf) -
|
|
|
2902 (same_at_end + st.st_size - BUF_ZV (buf));
|
|
|
2903 if (overlap > 0)
|
|
|
2904 same_at_end += overlap;
|
|
|
2905
|
|
|
2906 /* Arrange to read only the nonmatching middle part of the file. */
|
|
444
|
2907 start = make_int (same_at_start - BUF_BEGV (buf));
|
|
428
|
2908 end = make_int (st.st_size - (BUF_ZV (buf) - same_at_end));
|
|
|
2909
|
|
|
2910 buffer_delete_range (buf, same_at_start, same_at_end,
|
|
|
2911 !NILP (visit) ? INSDEL_NO_LOCKING : 0);
|
|
|
2912 /* Insert from the file at the proper position. */
|
|
|
2913 BUF_SET_PT (buf, same_at_start);
|
|
|
2914 }
|
|
|
2915 #endif /* FSFMACS_SPEEDY_INSERT */
|
|
|
2916
|
|
|
2917 if (!not_regular)
|
|
|
2918 {
|
|
444
|
2919 total = XINT (end) - XINT (start);
|
|
428
|
2920
|
|
|
2921 /* Make sure point-max won't overflow after this insertion. */
|
|
|
2922 if (total != XINT (make_int (total)))
|
|
563
|
2923 out_of_memory ("Maximum buffer size exceeded", Qunbound);
|
|
428
|
2924 }
|
|
|
2925 else
|
|
|
2926 /* For a special file, all we can do is guess. The value of -1
|
|
|
2927 will make the stream functions read as much as possible. */
|
|
|
2928 total = -1;
|
|
|
2929
|
|
444
|
2930 if (XINT (start) != 0
|
|
428
|
2931 #ifdef FSFMACS_SPEEDY_INSERT
|
|
|
2932 /* why was this here? asked jwz. The reason is that the replace-mode
|
|
|
2933 connivings above will normally put the file pointer other than
|
|
|
2934 where it should be. */
|
|
|
2935 || !NILP (replace)
|
|
|
2936 #endif /* !FSFMACS_SPEEDY_INSERT */
|
|
|
2937 )
|
|
|
2938 {
|
|
444
|
2939 if (lseek (fd, XINT (start), 0) < 0)
|
|
563
|
2940 report_file_error ("Setting file position", filename);
|
|
428
|
2941 }
|
|
|
2942
|
|
|
2943 {
|
|
665
|
2944 Charbpos cur_point = BUF_PT (buf);
|
|
428
|
2945 struct gcpro ngcpro1;
|
|
|
2946 Lisp_Object stream = make_filedesc_input_stream (fd, 0, total,
|
|
|
2947 LSTR_ALLOW_QUIT);
|
|
|
2948
|
|
|
2949 NGCPRO1 (stream);
|
|
|
2950 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
2951 #ifdef FILE_CODING
|
|
|
2952 stream = make_decoding_input_stream
|
|
|
2953 (XLSTREAM (stream), Fget_coding_system (codesys));
|
|
|
2954 Lstream_set_character_mode (XLSTREAM (stream));
|
|
|
2955 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
2956 #endif /* FILE_CODING */
|
|
|
2957
|
|
|
2958 record_unwind_protect (delete_stream_unwind, stream);
|
|
|
2959
|
|
|
2960 /* No need to limit the amount of stuff we attempt to read. (It would
|
|
|
2961 be incorrect, anyway, when Mule is enabled.) Instead, the limiting
|
|
|
2962 occurs inside of the filedesc stream. */
|
|
|
2963 while (1)
|
|
|
2964 {
|
|
665
|
2965 Bytecount this_len;
|
|
428
|
2966 Charcount cc_inserted;
|
|
|
2967
|
|
|
2968 QUIT;
|
|
|
2969 this_len = Lstream_read (XLSTREAM (stream), read_buf,
|
|
|
2970 sizeof (read_buf));
|
|
|
2971
|
|
|
2972 if (this_len <= 0)
|
|
|
2973 {
|
|
|
2974 if (this_len < 0)
|
|
|
2975 saverrno = errno;
|
|
|
2976 break;
|
|
|
2977 }
|
|
|
2978
|
|
|
2979 cc_inserted = buffer_insert_raw_string_1 (buf, cur_point, read_buf,
|
|
|
2980 this_len,
|
|
|
2981 !NILP (visit)
|
|
|
2982 ? INSDEL_NO_LOCKING : 0);
|
|
|
2983 inserted += cc_inserted;
|
|
|
2984 cur_point += cc_inserted;
|
|
|
2985 }
|
|
|
2986 #ifdef FILE_CODING
|
|
|
2987 if (!NILP (used_codesys))
|
|
|
2988 {
|
|
|
2989 Fset (used_codesys,
|
|
|
2990 XCODING_SYSTEM_NAME (decoding_stream_coding_system (XLSTREAM (stream))));
|
|
|
2991 }
|
|
|
2992 #endif /* FILE_CODING */
|
|
|
2993 NUNGCPRO;
|
|
|
2994 }
|
|
|
2995
|
|
|
2996 /* Close the file/stream */
|
|
|
2997 unbind_to (speccount, Qnil);
|
|
|
2998
|
|
|
2999 if (saverrno != 0)
|
|
|
3000 {
|
|
563
|
3001 errno = saverrno;
|
|
|
3002 report_file_error ("Reading", filename);
|
|
428
|
3003 }
|
|
|
3004
|
|
|
3005 notfound:
|
|
|
3006 handled:
|
|
|
3007
|
|
|
3008 end_multiple_change (buf, mc_count);
|
|
|
3009
|
|
|
3010 if (!NILP (visit))
|
|
|
3011 {
|
|
|
3012 if (!EQ (buf->undo_list, Qt))
|
|
|
3013 buf->undo_list = Qnil;
|
|
|
3014 if (NILP (handler))
|
|
|
3015 {
|
|
|
3016 buf->modtime = st.st_mtime;
|
|
|
3017 buf->filename = filename;
|
|
|
3018 /* XEmacs addition: */
|
|
|
3019 /* This function used to be in C, ostensibly so that
|
|
|
3020 it could be called here. But that's just silly.
|
|
|
3021 There's no reason C code can't call out to Lisp
|
|
|
3022 code, and it's a lot cleaner this way. */
|
|
444
|
3023 /* Note: compute-buffer-file-truename is called for
|
|
|
3024 side-effect! Its return value is intentionally
|
|
|
3025 ignored. */
|
|
428
|
3026 if (!NILP (Ffboundp (Qcompute_buffer_file_truename)))
|
|
|
3027 call1 (Qcompute_buffer_file_truename, make_buffer (buf));
|
|
|
3028 }
|
|
|
3029 BUF_SAVE_MODIFF (buf) = BUF_MODIFF (buf);
|
|
|
3030 buf->auto_save_modified = BUF_MODIFF (buf);
|
|
|
3031 buf->saved_size = make_int (BUF_SIZE (buf));
|
|
|
3032 #ifdef CLASH_DETECTION
|
|
|
3033 if (NILP (handler))
|
|
|
3034 {
|
|
|
3035 if (!NILP (buf->file_truename))
|
|
|
3036 unlock_file (buf->file_truename);
|
|
|
3037 unlock_file (filename);
|
|
|
3038 }
|
|
|
3039 #endif /* CLASH_DETECTION */
|
|
|
3040 if (not_regular)
|
|
|
3041 RETURN_UNGCPRO (Fsignal (Qfile_error,
|
|
|
3042 list2 (build_string ("not a regular file"),
|
|
|
3043 filename)));
|
|
|
3044
|
|
|
3045 /* If visiting nonexistent file, return nil. */
|
|
|
3046 if (buf->modtime == -1)
|
|
|
3047 report_file_error ("Opening input file",
|
|
563
|
3048 filename);
|
|
428
|
3049 }
|
|
|
3050
|
|
|
3051 /* Decode file format */
|
|
|
3052 if (inserted > 0)
|
|
|
3053 {
|
|
|
3054 Lisp_Object insval = call3 (Qformat_decode,
|
|
|
3055 Qnil, make_int (inserted), visit);
|
|
|
3056 CHECK_INT (insval);
|
|
|
3057 inserted = XINT (insval);
|
|
|
3058 }
|
|
|
3059
|
|
|
3060 if (inserted > 0)
|
|
|
3061 {
|
|
|
3062 Lisp_Object p;
|
|
|
3063 struct gcpro ngcpro1;
|
|
|
3064
|
|
|
3065 NGCPRO1 (p);
|
|
|
3066 EXTERNAL_LIST_LOOP (p, Vafter_insert_file_functions)
|
|
|
3067 {
|
|
|
3068 Lisp_Object insval =
|
|
|
3069 call1 (XCAR (p), make_int (inserted));
|
|
|
3070 if (!NILP (insval))
|
|
|
3071 {
|
|
|
3072 CHECK_NATNUM (insval);
|
|
|
3073 inserted = XINT (insval);
|
|
|
3074 }
|
|
|
3075 QUIT;
|
|
|
3076 }
|
|
|
3077 NUNGCPRO;
|
|
|
3078 }
|
|
|
3079
|
|
|
3080 UNGCPRO;
|
|
|
3081
|
|
|
3082 if (!NILP (val))
|
|
|
3083 return (val);
|
|
|
3084 else
|
|
|
3085 return (list2 (filename, make_int (inserted)));
|
|
|
3086 }
|
|
|
3087
|
|
|
3088
|
|
|
3089 static int a_write (Lisp_Object outstream, Lisp_Object instream, int pos,
|
|
|
3090 Lisp_Object *annot);
|
|
|
3091 static Lisp_Object build_annotations (Lisp_Object start, Lisp_Object end);
|
|
|
3092
|
|
|
3093 /* If build_annotations switched buffers, switch back to BUF.
|
|
|
3094 Kill the temporary buffer that was selected in the meantime. */
|
|
|
3095
|
|
|
3096 static Lisp_Object
|
|
|
3097 build_annotations_unwind (Lisp_Object buf)
|
|
|
3098 {
|
|
|
3099 Lisp_Object tembuf;
|
|
|
3100
|
|
|
3101 if (XBUFFER (buf) == current_buffer)
|
|
|
3102 return Qnil;
|
|
|
3103 tembuf = Fcurrent_buffer ();
|
|
|
3104 Fset_buffer (buf);
|
|
|
3105 Fkill_buffer (tembuf);
|
|
|
3106 return Qnil;
|
|
|
3107 }
|
|
|
3108
|
|
|
3109 DEFUN ("write-region-internal", Fwrite_region_internal, 3, 7,
|
|
|
3110 "r\nFWrite region to file: ", /*
|
|
|
3111 Write current region into specified file; no coding-system frobbing.
|
|
|
3112 This function is identical to `write-region' except for the handling
|
|
|
3113 of the CODESYS argument under XEmacs/Mule. (When Mule support is not
|
|
|
3114 present, both functions are identical and ignore the CODESYS argument.)
|
|
|
3115 If support for Mule exists in this Emacs, the file is encoded according
|
|
|
3116 to the value of CODESYS. If this is nil, no code conversion occurs.
|
|
764
|
3117
|
|
|
3118 As a special kludge to support auto-saving, when START is nil START and
|
|
|
3119 END are set to the beginning and end, respectively, of the buffer,
|
|
|
3120 regardless of any restrictions. Don't use this feature. It is documented
|
|
|
3121 here because write-region handler writers need to be aware of it.
|
|
428
|
3122 */
|
|
|
3123 (start, end, filename, append, visit, lockname, codesys))
|
|
|
3124 {
|
|
442
|
3125 /* This function can call lisp. GC checked 2000-07-28 ben */
|
|
428
|
3126 int desc;
|
|
|
3127 int failure;
|
|
|
3128 int save_errno = 0;
|
|
|
3129 struct stat st;
|
|
442
|
3130 Lisp_Object fn = Qnil;
|
|
428
|
3131 int speccount = specpdl_depth ();
|
|
|
3132 int visiting_other = STRINGP (visit);
|
|
|
3133 int visiting = (EQ (visit, Qt) || visiting_other);
|
|
|
3134 int quietly = (!visiting && !NILP (visit));
|
|
|
3135 Lisp_Object visit_file = Qnil;
|
|
|
3136 Lisp_Object annotations = Qnil;
|
|
|
3137 struct buffer *given_buffer;
|
|
665
|
3138 Charbpos start1, end1;
|
|
442
|
3139 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
3140 struct gcpro ngcpro1, ngcpro2;
|
|
|
3141 Lisp_Object curbuf;
|
|
|
3142
|
|
|
3143 XSETBUFFER (curbuf, current_buffer);
|
|
|
3144
|
|
|
3145 /* start, end, visit, and append are never modified in this fun
|
|
|
3146 so we don't protect them. */
|
|
|
3147 GCPRO5 (visit_file, filename, codesys, lockname, annotations);
|
|
|
3148 NGCPRO2 (curbuf, fn);
|
|
|
3149
|
|
|
3150 /* [[ dmoore - if Fexpand_file_name or handlers kill the buffer,
|
|
428
|
3151 we should signal an error rather than blissfully continuing
|
|
|
3152 along. ARGH, this function is going to lose lose lose. We need
|
|
|
3153 to protect the current_buffer from being destroyed, but the
|
|
442
|
3154 multiple return points make this a pain in the butt. ]] we do
|
|
|
3155 protect curbuf now. --ben */
|
|
428
|
3156
|
|
|
3157 #ifdef FILE_CODING
|
|
|
3158 codesys = Fget_coding_system (codesys);
|
|
|
3159 #endif /* FILE_CODING */
|
|
|
3160
|
|
|
3161 if (current_buffer->base_buffer && ! NILP (visit))
|
|
442
|
3162 invalid_operation ("Cannot do file visiting in an indirect buffer",
|
|
|
3163 curbuf);
|
|
428
|
3164
|
|
|
3165 if (!NILP (start) && !STRINGP (start))
|
|
|
3166 get_buffer_range_char (current_buffer, start, end, &start1, &end1, 0);
|
|
|
3167
|
|
|
3168 {
|
|
|
3169 Lisp_Object handler;
|
|
|
3170
|
|
|
3171 if (visiting_other)
|
|
|
3172 visit_file = Fexpand_file_name (visit, Qnil);
|
|
|
3173 else
|
|
|
3174 visit_file = filename;
|
|
|
3175 filename = Fexpand_file_name (filename, Qnil);
|
|
|
3176
|
|
|
3177 if (NILP (lockname))
|
|
|
3178 lockname = visit_file;
|
|
|
3179
|
|
442
|
3180 /* We used to UNGCPRO here. BAD! visit_file is used below after
|
|
|
3181 more Lisp calling. */
|
|
428
|
3182 /* If the file name has special constructs in it,
|
|
|
3183 call the corresponding file handler. */
|
|
|
3184 handler = Ffind_file_name_handler (filename, Qwrite_region);
|
|
|
3185 /* If FILENAME has no handler, see if VISIT has one. */
|
|
|
3186 if (NILP (handler) && STRINGP (visit))
|
|
|
3187 handler = Ffind_file_name_handler (visit, Qwrite_region);
|
|
|
3188
|
|
|
3189 if (!NILP (handler))
|
|
|
3190 {
|
|
|
3191 Lisp_Object val = call8 (handler, Qwrite_region, start, end,
|
|
|
3192 filename, append, visit, lockname, codesys);
|
|
|
3193 if (visiting)
|
|
|
3194 {
|
|
|
3195 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer);
|
|
|
3196 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer));
|
|
|
3197 current_buffer->filename = visit_file;
|
|
|
3198 MARK_MODELINE_CHANGED;
|
|
|
3199 }
|
|
442
|
3200 NUNGCPRO;
|
|
|
3201 UNGCPRO;
|
|
428
|
3202 return val;
|
|
|
3203 }
|
|
|
3204 }
|
|
|
3205
|
|
|
3206 #ifdef CLASH_DETECTION
|
|
|
3207 if (!auto_saving)
|
|
442
|
3208 lock_file (lockname);
|
|
428
|
3209 #endif /* CLASH_DETECTION */
|
|
|
3210
|
|
|
3211 /* Special kludge to simplify auto-saving. */
|
|
|
3212 if (NILP (start))
|
|
|
3213 {
|
|
|
3214 start1 = BUF_BEG (current_buffer);
|
|
|
3215 end1 = BUF_Z (current_buffer);
|
|
|
3216 }
|
|
|
3217
|
|
|
3218 record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ());
|
|
|
3219
|
|
|
3220 given_buffer = current_buffer;
|
|
|
3221 annotations = build_annotations (start, end);
|
|
|
3222 if (current_buffer != given_buffer)
|
|
|
3223 {
|
|
|
3224 start1 = BUF_BEGV (current_buffer);
|
|
|
3225 end1 = BUF_ZV (current_buffer);
|
|
|
3226 }
|
|
|
3227
|
|
|
3228 fn = filename;
|
|
|
3229 desc = -1;
|
|
|
3230 if (!NILP (append))
|
|
|
3231 {
|
|
|
3232 desc = open ((char *) XSTRING_DATA (fn), O_WRONLY | OPEN_BINARY, 0);
|
|
|
3233 }
|
|
|
3234 if (desc < 0)
|
|
|
3235 {
|
|
|
3236 desc = open ((char *) XSTRING_DATA (fn),
|
|
442
|
3237 O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY,
|
|
|
3238 auto_saving ? auto_save_mode_bits : CREAT_MODE);
|
|
428
|
3239 }
|
|
|
3240
|
|
|
3241 if (desc < 0)
|
|
|
3242 {
|
|
|
3243 #ifdef CLASH_DETECTION
|
|
|
3244 save_errno = errno;
|
|
|
3245 if (!auto_saving) unlock_file (lockname);
|
|
|
3246 errno = save_errno;
|
|
|
3247 #endif /* CLASH_DETECTION */
|
|
563
|
3248 report_file_error ("Opening output file", filename);
|
|
428
|
3249 }
|
|
|
3250
|
|
|
3251 {
|
|
|
3252 Lisp_Object desc_locative = Fcons (make_int (desc), Qnil);
|
|
|
3253 Lisp_Object instream = Qnil, outstream = Qnil;
|
|
442
|
3254 struct gcpro nngcpro1, nngcpro2;
|
|
428
|
3255 /* need to gcpro; QUIT could happen out of call to write() */
|
|
442
|
3256 NNGCPRO2 (instream, outstream);
|
|
428
|
3257
|
|
|
3258 record_unwind_protect (close_file_unwind, desc_locative);
|
|
|
3259
|
|
|
3260 if (!NILP (append))
|
|
|
3261 {
|
|
|
3262 if (lseek (desc, 0, 2) < 0)
|
|
|
3263 {
|
|
|
3264 #ifdef CLASH_DETECTION
|
|
|
3265 if (!auto_saving) unlock_file (lockname);
|
|
|
3266 #endif /* CLASH_DETECTION */
|
|
|
3267 report_file_error ("Lseek error",
|
|
563
|
3268 filename);
|
|
428
|
3269 }
|
|
|
3270 }
|
|
|
3271
|
|
|
3272 failure = 0;
|
|
|
3273
|
|
|
3274 /* Note: I tried increasing the buffering size, along with
|
|
|
3275 various other tricks, but nothing seemed to make much of
|
|
|
3276 a difference in the time it took to save a large file.
|
|
|
3277 (Actually that's not true. With a local disk, changing
|
|
|
3278 the buffer size doesn't seem to make much difference.
|
|
|
3279 With an NFS-mounted disk, it could make a lot of difference
|
|
|
3280 because you're affecting the number of network requests
|
|
|
3281 that need to be made, and there could be a large latency
|
|
|
3282 for each request. So I've increased the buffer size
|
|
|
3283 to 64K.) */
|
|
|
3284 outstream = make_filedesc_output_stream (desc, 0, -1, 0);
|
|
|
3285 Lstream_set_buffering (XLSTREAM (outstream),
|
|
|
3286 LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
3287 #ifdef FILE_CODING
|
|
|
3288 outstream =
|
|
|
3289 make_encoding_output_stream (XLSTREAM (outstream), codesys);
|
|
|
3290 Lstream_set_buffering (XLSTREAM (outstream),
|
|
|
3291 LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
3292 #endif /* FILE_CODING */
|
|
|
3293 if (STRINGP (start))
|
|
|
3294 {
|
|
|
3295 instream = make_lisp_string_input_stream (start, 0, -1);
|
|
|
3296 start1 = 0;
|
|
|
3297 }
|
|
|
3298 else
|
|
|
3299 instream = make_lisp_buffer_input_stream (current_buffer, start1, end1,
|
|
|
3300 LSTR_SELECTIVE |
|
|
|
3301 LSTR_IGNORE_ACCESSIBLE);
|
|
|
3302 failure = (0 > (a_write (outstream, instream, start1,
|
|
|
3303 &annotations)));
|
|
|
3304 save_errno = errno;
|
|
|
3305 /* Note that this doesn't close the desc since we created the
|
|
|
3306 stream without the LSTR_CLOSING flag, but it does
|
|
|
3307 flush out any buffered data. */
|
|
|
3308 if (Lstream_close (XLSTREAM (outstream)) < 0)
|
|
|
3309 {
|
|
|
3310 failure = 1;
|
|
|
3311 save_errno = errno;
|
|
|
3312 }
|
|
|
3313 Lstream_close (XLSTREAM (instream));
|
|
|
3314
|
|
|
3315 #ifdef HAVE_FSYNC
|
|
|
3316 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
|
|
|
3317 Disk full in NFS may be reported here. */
|
|
|
3318 /* mib says that closing the file will try to write as fast as NFS can do
|
|
|
3319 it, and that means the fsync here is not crucial for autosave files. */
|
|
|
3320 if (!auto_saving && fsync (desc) < 0
|
|
|
3321 /* If fsync fails with EINTR, don't treat that as serious. */
|
|
|
3322 && errno != EINTR)
|
|
|
3323 {
|
|
|
3324 failure = 1;
|
|
|
3325 save_errno = errno;
|
|
|
3326 }
|
|
|
3327 #endif /* HAVE_FSYNC */
|
|
|
3328
|
|
440
|
3329 /* Spurious "file has changed on disk" warnings used to be seen on
|
|
|
3330 systems where close() can change the modtime. This is known to
|
|
|
3331 happen on various NFS file systems, on Windows, and on Linux.
|
|
|
3332 Rather than handling this on a per-system basis, we
|
|
442
|
3333 unconditionally do the xemacs_stat() after the close(). */
|
|
428
|
3334
|
|
|
3335 /* NFS can report a write failure now. */
|
|
|
3336 if (close (desc) < 0)
|
|
|
3337 {
|
|
|
3338 failure = 1;
|
|
|
3339 save_errno = errno;
|
|
|
3340 }
|
|
|
3341
|
|
|
3342 /* Discard the close unwind-protect. Execute the one for
|
|
|
3343 build_annotations (switches back to the original current buffer
|
|
|
3344 as necessary). */
|
|
|
3345 XCAR (desc_locative) = Qnil;
|
|
|
3346 unbind_to (speccount, Qnil);
|
|
442
|
3347
|
|
|
3348 NNUNGCPRO;
|
|
428
|
3349 }
|
|
|
3350
|
|
442
|
3351 xemacs_stat ((char *) XSTRING_DATA (fn), &st);
|
|
428
|
3352
|
|
|
3353 #ifdef CLASH_DETECTION
|
|
|
3354 if (!auto_saving)
|
|
|
3355 unlock_file (lockname);
|
|
|
3356 #endif /* CLASH_DETECTION */
|
|
|
3357
|
|
|
3358 /* Do this before reporting IO error
|
|
|
3359 to avoid a "file has changed on disk" warning on
|
|
|
3360 next attempt to save. */
|
|
|
3361 if (visiting)
|
|
|
3362 current_buffer->modtime = st.st_mtime;
|
|
|
3363
|
|
|
3364 if (failure)
|
|
442
|
3365 {
|
|
|
3366 errno = save_errno;
|
|
563
|
3367 report_file_error ("Writing file", fn);
|
|
442
|
3368 }
|
|
428
|
3369
|
|
|
3370 if (visiting)
|
|
|
3371 {
|
|
|
3372 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer);
|
|
|
3373 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer));
|
|
|
3374 current_buffer->filename = visit_file;
|
|
|
3375 MARK_MODELINE_CHANGED;
|
|
|
3376 }
|
|
|
3377 else if (quietly)
|
|
|
3378 {
|
|
442
|
3379 NUNGCPRO;
|
|
|
3380 UNGCPRO;
|
|
428
|
3381 return Qnil;
|
|
|
3382 }
|
|
|
3383
|
|
|
3384 if (!auto_saving)
|
|
|
3385 {
|
|
|
3386 if (visiting_other)
|
|
|
3387 message ("Wrote %s", XSTRING_DATA (visit_file));
|
|
|
3388 else
|
|
|
3389 {
|
|
446
|
3390 Lisp_Object fsp = Qnil;
|
|
442
|
3391 struct gcpro nngcpro1;
|
|
|
3392
|
|
|
3393 NNGCPRO1 (fsp);
|
|
428
|
3394 fsp = Ffile_symlink_p (fn);
|
|
|
3395 if (NILP (fsp))
|
|
|
3396 message ("Wrote %s", XSTRING_DATA (fn));
|
|
|
3397 else
|
|
|
3398 message ("Wrote %s (symlink to %s)",
|
|
|
3399 XSTRING_DATA (fn), XSTRING_DATA (fsp));
|
|
442
|
3400 NNUNGCPRO;
|
|
428
|
3401 }
|
|
|
3402 }
|
|
442
|
3403 NUNGCPRO;
|
|
|
3404 UNGCPRO;
|
|
428
|
3405 return Qnil;
|
|
|
3406 }
|
|
|
3407
|
|
|
3408 /* #### This is such a load of shit!!!! There is no way we should define
|
|
|
3409 something so stupid as a subr, just sort the fucking list more
|
|
|
3410 intelligently. */
|
|
|
3411 DEFUN ("car-less-than-car", Fcar_less_than_car, 2, 2, 0, /*
|
|
|
3412 Return t if (car A) is numerically less than (car B).
|
|
|
3413 */
|
|
|
3414 (a, b))
|
|
|
3415 {
|
|
|
3416 Lisp_Object objs[2];
|
|
|
3417 objs[0] = Fcar (a);
|
|
|
3418 objs[1] = Fcar (b);
|
|
|
3419 return Flss (2, objs);
|
|
|
3420 }
|
|
|
3421
|
|
|
3422 /* Heh heh heh, let's define this too, just to aggravate the person who
|
|
|
3423 wrote the above comment. */
|
|
|
3424 DEFUN ("cdr-less-than-cdr", Fcdr_less_than_cdr, 2, 2, 0, /*
|
|
|
3425 Return t if (cdr A) is numerically less than (cdr B).
|
|
|
3426 */
|
|
|
3427 (a, b))
|
|
|
3428 {
|
|
|
3429 Lisp_Object objs[2];
|
|
|
3430 objs[0] = Fcdr (a);
|
|
|
3431 objs[1] = Fcdr (b);
|
|
|
3432 return Flss (2, objs);
|
|
|
3433 }
|
|
|
3434
|
|
|
3435 /* Build the complete list of annotations appropriate for writing out
|
|
|
3436 the text between START and END, by calling all the functions in
|
|
|
3437 write-region-annotate-functions and merging the lists they return.
|
|
|
3438 If one of these functions switches to a different buffer, we assume
|
|
|
3439 that buffer contains altered text. Therefore, the caller must
|
|
|
3440 make sure to restore the current buffer in all cases,
|
|
|
3441 as save-excursion would do. */
|
|
|
3442
|
|
|
3443 static Lisp_Object
|
|
|
3444 build_annotations (Lisp_Object start, Lisp_Object end)
|
|
|
3445 {
|
|
|
3446 /* This function can GC */
|
|
|
3447 Lisp_Object annotations;
|
|
|
3448 Lisp_Object p, res;
|
|
|
3449 struct gcpro gcpro1, gcpro2;
|
|
|
3450 Lisp_Object original_buffer;
|
|
|
3451
|
|
|
3452 XSETBUFFER (original_buffer, current_buffer);
|
|
|
3453
|
|
|
3454 annotations = Qnil;
|
|
|
3455 p = Vwrite_region_annotate_functions;
|
|
|
3456 GCPRO2 (annotations, p);
|
|
|
3457 while (!NILP (p))
|
|
|
3458 {
|
|
|
3459 struct buffer *given_buffer = current_buffer;
|
|
|
3460 Vwrite_region_annotations_so_far = annotations;
|
|
|
3461 res = call2 (Fcar (p), start, end);
|
|
|
3462 /* If the function makes a different buffer current,
|
|
|
3463 assume that means this buffer contains altered text to be output.
|
|
|
3464 Reset START and END from the buffer bounds
|
|
|
3465 and discard all previous annotations because they should have
|
|
|
3466 been dealt with by this function. */
|
|
|
3467 if (current_buffer != given_buffer)
|
|
|
3468 {
|
|
|
3469 start = make_int (BUF_BEGV (current_buffer));
|
|
|
3470 end = make_int (BUF_ZV (current_buffer));
|
|
|
3471 annotations = Qnil;
|
|
|
3472 }
|
|
|
3473 Flength (res); /* Check basic validity of return value */
|
|
|
3474 annotations = merge (annotations, res, Qcar_less_than_car);
|
|
|
3475 p = Fcdr (p);
|
|
|
3476 }
|
|
|
3477
|
|
|
3478 /* Now do the same for annotation functions implied by the file-format */
|
|
|
3479 if (auto_saving && (!EQ (Vauto_save_file_format, Qt)))
|
|
|
3480 p = Vauto_save_file_format;
|
|
|
3481 else
|
|
|
3482 p = current_buffer->file_format;
|
|
|
3483 while (!NILP (p))
|
|
|
3484 {
|
|
|
3485 struct buffer *given_buffer = current_buffer;
|
|
|
3486 Vwrite_region_annotations_so_far = annotations;
|
|
|
3487 res = call4 (Qformat_annotate_function, Fcar (p), start, end,
|
|
|
3488 original_buffer);
|
|
|
3489 if (current_buffer != given_buffer)
|
|
|
3490 {
|
|
|
3491 start = make_int (BUF_BEGV (current_buffer));
|
|
|
3492 end = make_int (BUF_ZV (current_buffer));
|
|
|
3493 annotations = Qnil;
|
|
|
3494 }
|
|
|
3495 Flength (res);
|
|
|
3496 annotations = merge (annotations, res, Qcar_less_than_car);
|
|
|
3497 p = Fcdr (p);
|
|
|
3498 }
|
|
|
3499 UNGCPRO;
|
|
|
3500 return annotations;
|
|
|
3501 }
|
|
|
3502
|
|
|
3503 /* Write to stream OUTSTREAM the characters from INSTREAM (it is read until
|
|
|
3504 EOF is encountered), assuming they start at position POS in the buffer
|
|
|
3505 of string that STREAM refers to. Intersperse with them the annotations
|
|
|
3506 from *ANNOT that fall into the range of positions we are reading from,
|
|
|
3507 each at its appropriate position.
|
|
|
3508
|
|
|
3509 Modify *ANNOT by discarding elements as we output them.
|
|
|
3510 The return value is negative in case of system call failure. */
|
|
|
3511
|
|
|
3512 /* 4K should probably be fine. We just need to reduce the number of
|
|
|
3513 function calls to reasonable level. The Lstream stuff itself will
|
|
|
3514 batch to 64K to reduce the number of system calls. */
|
|
|
3515
|
|
|
3516 #define A_WRITE_BATCH_SIZE 4096
|
|
|
3517
|
|
|
3518 static int
|
|
|
3519 a_write (Lisp_Object outstream, Lisp_Object instream, int pos,
|
|
|
3520 Lisp_Object *annot)
|
|
|
3521 {
|
|
|
3522 Lisp_Object tem;
|
|
|
3523 int nextpos;
|
|
|
3524 unsigned char largebuf[A_WRITE_BATCH_SIZE];
|
|
|
3525 Lstream *instr = XLSTREAM (instream);
|
|
|
3526 Lstream *outstr = XLSTREAM (outstream);
|
|
|
3527
|
|
|
3528 while (LISTP (*annot))
|
|
|
3529 {
|
|
|
3530 tem = Fcar_safe (Fcar (*annot));
|
|
|
3531 if (INTP (tem))
|
|
|
3532 nextpos = XINT (tem);
|
|
|
3533 else
|
|
|
3534 nextpos = INT_MAX;
|
|
|
3535 #ifdef MULE
|
|
|
3536 /* If there are annotations left and we have Mule, then we
|
|
|
3537 have to do the I/O one emchar at a time so we can
|
|
|
3538 determine when to insert the annotation. */
|
|
|
3539 if (!NILP (*annot))
|
|
|
3540 {
|
|
|
3541 Emchar ch;
|
|
|
3542 while (pos != nextpos && (ch = Lstream_get_emchar (instr)) != EOF)
|
|
|
3543 {
|
|
|
3544 if (Lstream_put_emchar (outstr, ch) < 0)
|
|
|
3545 return -1;
|
|
|
3546 pos++;
|
|
|
3547 }
|
|
|
3548 }
|
|
|
3549 else
|
|
|
3550 #endif /* MULE */
|
|
|
3551 {
|
|
|
3552 while (pos != nextpos)
|
|
|
3553 {
|
|
|
3554 /* Otherwise there is no point to that. Just go in batches. */
|
|
|
3555 int chunk = min (nextpos - pos, A_WRITE_BATCH_SIZE);
|
|
|
3556
|
|
|
3557 chunk = Lstream_read (instr, largebuf, chunk);
|
|
|
3558 if (chunk < 0)
|
|
|
3559 return -1;
|
|
|
3560 if (chunk == 0) /* EOF */
|
|
|
3561 break;
|
|
|
3562 if (Lstream_write (outstr, largebuf, chunk) < chunk)
|
|
|
3563 return -1;
|
|
|
3564 pos += chunk;
|
|
|
3565 }
|
|
|
3566 }
|
|
|
3567 if (pos == nextpos)
|
|
|
3568 {
|
|
|
3569 tem = Fcdr (Fcar (*annot));
|
|
|
3570 if (STRINGP (tem))
|
|
|
3571 {
|
|
|
3572 if (Lstream_write (outstr, XSTRING_DATA (tem),
|
|
|
3573 XSTRING_LENGTH (tem)) < 0)
|
|
|
3574 return -1;
|
|
|
3575 }
|
|
|
3576 *annot = Fcdr (*annot);
|
|
|
3577 }
|
|
|
3578 else
|
|
|
3579 return 0;
|
|
|
3580 }
|
|
|
3581 return -1;
|
|
|
3582 }
|
|
|
3583
|
|
|
3584
|
|
|
3585
|
|
|
3586 #if 0
|
|
|
3587 #include <des_crypt.h>
|
|
|
3588
|
|
|
3589 #define CRYPT_BLOCK_SIZE 8 /* bytes */
|
|
|
3590 #define CRYPT_KEY_SIZE 8 /* bytes */
|
|
|
3591
|
|
|
3592 DEFUN ("encrypt-string", Fencrypt_string, 2, 2, 0, /*
|
|
|
3593 Encrypt STRING using KEY.
|
|
|
3594 */
|
|
|
3595 (string, key))
|
|
|
3596 {
|
|
|
3597 char *encrypted_string, *raw_key;
|
|
|
3598 int rounded_size, extra, key_size;
|
|
|
3599
|
|
|
3600 /* !!#### May produce bogus data under Mule. */
|
|
|
3601 CHECK_STRING (string);
|
|
|
3602 CHECK_STRING (key);
|
|
|
3603
|
|
|
3604 extra = XSTRING_LENGTH (string) % CRYPT_BLOCK_SIZE;
|
|
|
3605 rounded_size = XSTRING_LENGTH (string) + extra;
|
|
|
3606 encrypted_string = alloca (rounded_size + 1);
|
|
|
3607 memcpy (encrypted_string, XSTRING_DATA (string), XSTRING_LENGTH (string));
|
|
|
3608 memset (encrypted_string + rounded_size - extra, 0, extra + 1);
|
|
|
3609
|
|
|
3610 key_size = min (CRYPT_KEY_SIZE, XSTRING_LENGTH (key))
|
|
|
3611
|
|
|
3612 raw_key = alloca (CRYPT_KEY_SIZE + 1);
|
|
|
3613 memcpy (raw_key, XSTRING_DATA (key), key_size);
|
|
|
3614 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size);
|
|
|
3615
|
|
|
3616 ecb_crypt (raw_key, encrypted_string, rounded_size,
|
|
|
3617 DES_ENCRYPT | DES_SW);
|
|
|
3618 return make_string (encrypted_string, rounded_size);
|
|
|
3619 }
|
|
|
3620
|
|
|
3621 DEFUN ("decrypt-string", Fdecrypt_string, 2, 2, 0, /*
|
|
|
3622 Decrypt STRING using KEY.
|
|
|
3623 */
|
|
|
3624 (string, key))
|
|
|
3625 {
|
|
|
3626 char *decrypted_string, *raw_key;
|
|
|
3627 int string_size, key_size;
|
|
|
3628
|
|
|
3629 CHECK_STRING (string);
|
|
|
3630 CHECK_STRING (key);
|
|
|
3631
|
|
|
3632 string_size = XSTRING_LENGTH (string) + 1;
|
|
|
3633 decrypted_string = alloca (string_size);
|
|
|
3634 memcpy (decrypted_string, XSTRING_DATA (string), string_size);
|
|
|
3635 decrypted_string[string_size - 1] = '\0';
|
|
|
3636
|
|
|
3637 key_size = min (CRYPT_KEY_SIZE, XSTRING_LENGTH (key))
|
|
|
3638
|
|
|
3639 raw_key = alloca (CRYPT_KEY_SIZE + 1);
|
|
|
3640 memcpy (raw_key, XSTRING_DATA (key), key_size);
|
|
|
3641 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size);
|
|
|
3642
|
|
|
3643
|
|
|
3644 ecb_crypt (raw_key, decrypted_string, string_size, D | DES_SW);
|
|
|
3645 return make_string (decrypted_string, string_size - 1);
|
|
|
3646 }
|
|
|
3647 #endif /* 0 */
|
|
|
3648
|
|
|
3649
|
|
|
3650 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, 1, 1, 0, /*
|
|
444
|
3651 Return t if last mod time of BUFFER's visited file matches what BUFFER records.
|
|
428
|
3652 This means that the file has not been changed since it was visited or saved.
|
|
|
3653 */
|
|
444
|
3654 (buffer))
|
|
428
|
3655 {
|
|
442
|
3656 /* This function can call lisp; GC checked 2000-07-11 ben */
|
|
428
|
3657 struct buffer *b;
|
|
|
3658 struct stat st;
|
|
|
3659 Lisp_Object handler;
|
|
|
3660
|
|
444
|
3661 CHECK_BUFFER (buffer);
|
|
|
3662 b = XBUFFER (buffer);
|
|
428
|
3663
|
|
|
3664 if (!STRINGP (b->filename)) return Qt;
|
|
|
3665 if (b->modtime == 0) return Qt;
|
|
|
3666
|
|
|
3667 /* If the file name has special constructs in it,
|
|
|
3668 call the corresponding file handler. */
|
|
|
3669 handler = Ffind_file_name_handler (b->filename,
|
|
|
3670 Qverify_visited_file_modtime);
|
|
|
3671 if (!NILP (handler))
|
|
444
|
3672 return call2 (handler, Qverify_visited_file_modtime, buffer);
|
|
428
|
3673
|
|
442
|
3674 if (xemacs_stat ((char *) XSTRING_DATA (b->filename), &st) < 0)
|
|
428
|
3675 {
|
|
|
3676 /* If the file doesn't exist now and didn't exist before,
|
|
|
3677 we say that it isn't modified, provided the error is a tame one. */
|
|
|
3678 if (errno == ENOENT || errno == EACCES || errno == ENOTDIR)
|
|
|
3679 st.st_mtime = -1;
|
|
|
3680 else
|
|
|
3681 st.st_mtime = 0;
|
|
|
3682 }
|
|
|
3683 if (st.st_mtime == b->modtime
|
|
|
3684 /* If both are positive, accept them if they are off by one second. */
|
|
|
3685 || (st.st_mtime > 0 && b->modtime > 0
|
|
|
3686 && (st.st_mtime == b->modtime + 1
|
|
|
3687 || st.st_mtime == b->modtime - 1)))
|
|
|
3688 return Qt;
|
|
|
3689 return Qnil;
|
|
|
3690 }
|
|
|
3691
|
|
|
3692 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, 0, 0, 0, /*
|
|
|
3693 Clear out records of last mod time of visited file.
|
|
|
3694 Next attempt to save will certainly not complain of a discrepancy.
|
|
|
3695 */
|
|
|
3696 ())
|
|
|
3697 {
|
|
|
3698 current_buffer->modtime = 0;
|
|
|
3699 return Qnil;
|
|
|
3700 }
|
|
|
3701
|
|
|
3702 DEFUN ("visited-file-modtime", Fvisited_file_modtime, 0, 0, 0, /*
|
|
|
3703 Return the current buffer's recorded visited file modification time.
|
|
|
3704 The value is a list of the form (HIGH . LOW), like the time values
|
|
|
3705 that `file-attributes' returns.
|
|
|
3706 */
|
|
|
3707 ())
|
|
|
3708 {
|
|
|
3709 return time_to_lisp ((time_t) current_buffer->modtime);
|
|
|
3710 }
|
|
|
3711
|
|
|
3712 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, 0, 1, 0, /*
|
|
|
3713 Update buffer's recorded modification time from the visited file's time.
|
|
|
3714 Useful if the buffer was not read from the file normally
|
|
|
3715 or if the file itself has been changed for some known benign reason.
|
|
|
3716 An argument specifies the modification time value to use
|
|
|
3717 \(instead of that of the visited file), in the form of a list
|
|
|
3718 \(HIGH . LOW) or (HIGH LOW).
|
|
|
3719 */
|
|
|
3720 (time_list))
|
|
|
3721 {
|
|
|
3722 /* This function can call lisp */
|
|
|
3723 if (!NILP (time_list))
|
|
|
3724 {
|
|
|
3725 time_t the_time;
|
|
|
3726 lisp_to_time (time_list, &the_time);
|
|
|
3727 current_buffer->modtime = (int) the_time;
|
|
|
3728 }
|
|
|
3729 else
|
|
|
3730 {
|
|
446
|
3731 Lisp_Object filename = Qnil;
|
|
428
|
3732 struct stat st;
|
|
|
3733 Lisp_Object handler;
|
|
|
3734 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3735
|
|
|
3736 GCPRO3 (filename, time_list, current_buffer->filename);
|
|
|
3737 filename = Fexpand_file_name (current_buffer->filename, Qnil);
|
|
|
3738
|
|
|
3739 /* If the file name has special constructs in it,
|
|
|
3740 call the corresponding file handler. */
|
|
|
3741 handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime);
|
|
|
3742 UNGCPRO;
|
|
|
3743 if (!NILP (handler))
|
|
|
3744 /* The handler can find the file name the same way we did. */
|
|
|
3745 return call2 (handler, Qset_visited_file_modtime, Qnil);
|
|
442
|
3746 else if (xemacs_stat ((char *) XSTRING_DATA (filename), &st) >= 0)
|
|
428
|
3747 current_buffer->modtime = st.st_mtime;
|
|
|
3748 }
|
|
|
3749
|
|
|
3750 return Qnil;
|
|
|
3751 }
|
|
|
3752
|
|
|
3753 static Lisp_Object
|
|
|
3754 auto_save_error (Lisp_Object condition_object, Lisp_Object ignored)
|
|
|
3755 {
|
|
|
3756 /* This function can call lisp */
|
|
|
3757 if (gc_in_progress)
|
|
|
3758 return Qnil;
|
|
|
3759 /* Don't try printing an error message after everything is gone! */
|
|
|
3760 if (preparing_for_armageddon)
|
|
|
3761 return Qnil;
|
|
|
3762 clear_echo_area (selected_frame (), Qauto_saving, 1);
|
|
|
3763 Fding (Qt, Qauto_save_error, Qnil);
|
|
|
3764 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name));
|
|
|
3765 Fsleep_for (make_int (1));
|
|
|
3766 message ("Auto-saving...error!for %s", XSTRING_DATA (current_buffer->name));
|
|
|
3767 Fsleep_for (make_int (1));
|
|
|
3768 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name));
|
|
|
3769 Fsleep_for (make_int (1));
|
|
|
3770 return Qnil;
|
|
|
3771 }
|
|
|
3772
|
|
|
3773 static Lisp_Object
|
|
|
3774 auto_save_1 (Lisp_Object ignored)
|
|
|
3775 {
|
|
|
3776 /* This function can call lisp */
|
|
|
3777 /* #### I think caller is protecting current_buffer? */
|
|
|
3778 struct stat st;
|
|
|
3779 Lisp_Object fn = current_buffer->filename;
|
|
|
3780 Lisp_Object a = current_buffer->auto_save_file_name;
|
|
|
3781
|
|
|
3782 if (!STRINGP (a))
|
|
|
3783 return (Qnil);
|
|
|
3784
|
|
|
3785 /* Get visited file's mode to become the auto save file's mode. */
|
|
|
3786 if (STRINGP (fn) &&
|
|
442
|
3787 xemacs_stat ((char *) XSTRING_DATA (fn), &st) >= 0)
|
|
428
|
3788 /* But make sure we can overwrite it later! */
|
|
|
3789 auto_save_mode_bits = st.st_mode | 0600;
|
|
|
3790 else
|
|
|
3791 /* default mode for auto-save files of buffers with no file is
|
|
|
3792 readable by owner only. This may annoy some small number of
|
|
|
3793 people, but the alternative removes all privacy from email. */
|
|
|
3794 auto_save_mode_bits = 0600;
|
|
|
3795
|
|
|
3796 return
|
|
|
3797 /* !!#### need to deal with this 'escape-quoted everywhere */
|
|
|
3798 Fwrite_region_internal (Qnil, Qnil, a, Qnil, Qlambda, Qnil,
|
|
707
|
3799 #ifdef FILE_CODING
|
|
|
3800 current_buffer->buffer_file_coding_system
|
|
428
|
3801 #else
|
|
|
3802 Qnil
|
|
|
3803 #endif
|
|
|
3804 );
|
|
|
3805 }
|
|
|
3806
|
|
|
3807 static Lisp_Object
|
|
|
3808 auto_save_expand_name_error (Lisp_Object condition_object, Lisp_Object ignored)
|
|
|
3809 {
|
|
|
3810 /* #### this function should spew an error message about not being
|
|
|
3811 able to open the .saves file. */
|
|
|
3812 return Qnil;
|
|
|
3813 }
|
|
|
3814
|
|
|
3815 static Lisp_Object
|
|
|
3816 auto_save_expand_name (Lisp_Object name)
|
|
|
3817 {
|
|
|
3818 struct gcpro gcpro1;
|
|
|
3819
|
|
|
3820 /* note that caller did NOT gc protect name, so we do it. */
|
|
|
3821 /* #### dmoore - this might not be necessary, if condition_case_1
|
|
|
3822 protects it. but I don't think it does. */
|
|
|
3823 GCPRO1 (name);
|
|
|
3824 RETURN_UNGCPRO (Fexpand_file_name (name, Qnil));
|
|
|
3825 }
|
|
|
3826
|
|
|
3827
|
|
|
3828 static Lisp_Object
|
|
|
3829 do_auto_save_unwind (Lisp_Object fd)
|
|
|
3830 {
|
|
|
3831 close (XINT (fd));
|
|
|
3832 return (fd);
|
|
|
3833 }
|
|
|
3834
|
|
|
3835 static Lisp_Object
|
|
|
3836 do_auto_save_unwind_2 (Lisp_Object old_auto_saving)
|
|
|
3837 {
|
|
|
3838 auto_saving = XINT (old_auto_saving);
|
|
|
3839 return Qnil;
|
|
|
3840 }
|
|
|
3841
|
|
|
3842 /* Fdo_auto_save() checks whether a GC is in progress when it is called,
|
|
|
3843 and if so, tries to avoid touching lisp objects.
|
|
|
3844
|
|
|
3845 The only time that Fdo_auto_save() is called while GC is in progress
|
|
|
3846 is if we're going down, as a result of an abort() or a kill signal.
|
|
|
3847 It's fairly important that we generate autosave files in that case!
|
|
|
3848 */
|
|
|
3849
|
|
|
3850 DEFUN ("do-auto-save", Fdo_auto_save, 0, 2, "", /*
|
|
|
3851 Auto-save all buffers that need it.
|
|
|
3852 This is all buffers that have auto-saving enabled
|
|
|
3853 and are changed since last auto-saved.
|
|
|
3854 Auto-saving writes the buffer into a file
|
|
|
3855 so that your editing is not lost if the system crashes.
|
|
|
3856 This file is not the file you visited; that changes only when you save.
|
|
|
3857 Normally we run the normal hook `auto-save-hook' before saving.
|
|
|
3858
|
|
|
3859 Non-nil first argument means do not print any message if successful.
|
|
|
3860 Non-nil second argument means save only current buffer.
|
|
|
3861 */
|
|
|
3862 (no_message, current_only))
|
|
|
3863 {
|
|
|
3864 /* This function can call lisp */
|
|
|
3865 struct buffer *b;
|
|
|
3866 Lisp_Object tail, buf;
|
|
|
3867 int auto_saved = 0;
|
|
|
3868 int do_handled_files;
|
|
|
3869 Lisp_Object oquit = Qnil;
|
|
|
3870 Lisp_Object listfile = Qnil;
|
|
|
3871 Lisp_Object old;
|
|
|
3872 int listdesc = -1;
|
|
|
3873 int speccount = specpdl_depth ();
|
|
|
3874 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3875
|
|
|
3876 XSETBUFFER (old, current_buffer);
|
|
|
3877 GCPRO3 (oquit, listfile, old);
|
|
|
3878 check_quit (); /* make Vquit_flag accurate */
|
|
|
3879 /* Ordinarily don't quit within this function,
|
|
|
3880 but don't make it impossible to quit (in case we get hung in I/O). */
|
|
|
3881 oquit = Vquit_flag;
|
|
|
3882 Vquit_flag = Qnil;
|
|
|
3883
|
|
|
3884 /* No further GCPRO needed, because (when it matters) all Lisp_Object
|
|
|
3885 variables point to non-strings reached from Vbuffer_alist. */
|
|
|
3886
|
|
|
3887 if (minibuf_level != 0 || preparing_for_armageddon)
|
|
|
3888 no_message = Qt;
|
|
|
3889
|
|
|
3890 run_hook (Qauto_save_hook);
|
|
|
3891
|
|
|
3892 if (STRINGP (Vauto_save_list_file_name))
|
|
|
3893 listfile = condition_case_1 (Qt,
|
|
|
3894 auto_save_expand_name,
|
|
|
3895 Vauto_save_list_file_name,
|
|
|
3896 auto_save_expand_name_error, Qnil);
|
|
|
3897
|
|
|
3898 /* Make sure auto_saving is reset. */
|
|
|
3899 record_unwind_protect (do_auto_save_unwind_2, make_int (auto_saving));
|
|
|
3900
|
|
|
3901 auto_saving = 1;
|
|
|
3902
|
|
|
3903 /* First, save all files which don't have handlers. If Emacs is
|
|
|
3904 crashing, the handlers may tweak what is causing Emacs to crash
|
|
|
3905 in the first place, and it would be a shame if Emacs failed to
|
|
|
3906 autosave perfectly ordinary files because it couldn't handle some
|
|
|
3907 ange-ftp'd file. */
|
|
|
3908 for (do_handled_files = 0; do_handled_files < 2; do_handled_files++)
|
|
|
3909 {
|
|
|
3910 for (tail = Vbuffer_alist;
|
|
|
3911 CONSP (tail);
|
|
|
3912 tail = XCDR (tail))
|
|
|
3913 {
|
|
|
3914 buf = XCDR (XCAR (tail));
|
|
|
3915 b = XBUFFER (buf);
|
|
|
3916
|
|
|
3917 if (!NILP (current_only)
|
|
|
3918 && b != current_buffer)
|
|
|
3919 continue;
|
|
|
3920
|
|
|
3921 /* Don't auto-save indirect buffers.
|
|
|
3922 The base buffer takes care of it. */
|
|
|
3923 if (b->base_buffer)
|
|
|
3924 continue;
|
|
|
3925
|
|
|
3926 /* Check for auto save enabled
|
|
|
3927 and file changed since last auto save
|
|
|
3928 and file changed since last real save. */
|
|
|
3929 if (STRINGP (b->auto_save_file_name)
|
|
|
3930 && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b)
|
|
|
3931 && b->auto_save_modified < BUF_MODIFF (b)
|
|
|
3932 /* -1 means we've turned off autosaving for a while--see below. */
|
|
|
3933 && XINT (b->saved_size) >= 0
|
|
|
3934 && (do_handled_files
|
|
|
3935 || NILP (Ffind_file_name_handler (b->auto_save_file_name,
|
|
|
3936 Qwrite_region))))
|
|
|
3937 {
|
|
|
3938 EMACS_TIME before_time, after_time;
|
|
|
3939
|
|
|
3940 EMACS_GET_TIME (before_time);
|
|
|
3941 /* If we had a failure, don't try again for 20 minutes. */
|
|
|
3942 if (!preparing_for_armageddon
|
|
|
3943 && b->auto_save_failure_time >= 0
|
|
|
3944 && (EMACS_SECS (before_time) - b->auto_save_failure_time <
|
|
|
3945 1200))
|
|
|
3946 continue;
|
|
|
3947
|
|
|
3948 if (!preparing_for_armageddon &&
|
|
|
3949 (XINT (b->saved_size) * 10
|
|
|
3950 > (BUF_Z (b) - BUF_BEG (b)) * 13)
|
|
|
3951 /* A short file is likely to change a large fraction;
|
|
|
3952 spare the user annoying messages. */
|
|
|
3953 && XINT (b->saved_size) > 5000
|
|
|
3954 /* These messages are frequent and annoying for `*mail*'. */
|
|
|
3955 && !NILP (b->filename)
|
|
|
3956 && NILP (no_message)
|
|
|
3957 && disable_auto_save_when_buffer_shrinks)
|
|
|
3958 {
|
|
|
3959 /* It has shrunk too much; turn off auto-saving here.
|
|
|
3960 Unless we're about to crash, in which case auto-save it
|
|
|
3961 anyway.
|
|
|
3962 */
|
|
|
3963 message
|
|
|
3964 ("Buffer %s has shrunk a lot; auto save turned off there",
|
|
|
3965 XSTRING_DATA (b->name));
|
|
|
3966 /* Turn off auto-saving until there's a real save,
|
|
|
3967 and prevent any more warnings. */
|
|
|
3968 b->saved_size = make_int (-1);
|
|
|
3969 if (!gc_in_progress)
|
|
|
3970 Fsleep_for (make_int (1));
|
|
|
3971 continue;
|
|
|
3972 }
|
|
|
3973 set_buffer_internal (b);
|
|
|
3974 if (!auto_saved && NILP (no_message))
|
|
|
3975 {
|
|
442
|
3976 static const unsigned char *msg
|
|
|
3977 = (const unsigned char *) "Auto-saving...";
|
|
428
|
3978 echo_area_message (selected_frame (), msg, Qnil,
|
|
442
|
3979 0, strlen ((const char *) msg),
|
|
428
|
3980 Qauto_saving);
|
|
|
3981 }
|
|
|
3982
|
|
|
3983 /* Open the auto-save list file, if necessary.
|
|
|
3984 We only do this now so that the file only exists
|
|
|
3985 if we actually auto-saved any files. */
|
|
444
|
3986 if (!auto_saved && !inhibit_auto_save_session
|
|
|
3987 && !NILP (Vauto_save_list_file_prefix)
|
|
|
3988 && STRINGP (listfile) && listdesc < 0)
|
|
428
|
3989 {
|
|
|
3990 listdesc = open ((char *) XSTRING_DATA (listfile),
|
|
|
3991 O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY,
|
|
|
3992 CREAT_MODE);
|
|
|
3993
|
|
|
3994 /* Arrange to close that file whether or not we get
|
|
|
3995 an error. */
|
|
|
3996 if (listdesc >= 0)
|
|
|
3997 record_unwind_protect (do_auto_save_unwind,
|
|
|
3998 make_int (listdesc));
|
|
|
3999 }
|
|
|
4000
|
|
|
4001 /* Record all the buffers that we are auto-saving in
|
|
|
4002 the special file that lists them. For each of
|
|
|
4003 these buffers, record visited name (if any) and
|
|
|
4004 auto save name. */
|
|
|
4005 if (listdesc >= 0)
|
|
|
4006 {
|
|
442
|
4007 const Extbyte *auto_save_file_name_ext;
|
|
665
|
4008 Bytecount auto_save_file_name_ext_len;
|
|
428
|
4009
|
|
440
|
4010 TO_EXTERNAL_FORMAT (LISP_STRING, b->auto_save_file_name,
|
|
|
4011 ALLOCA, (auto_save_file_name_ext,
|
|
|
4012 auto_save_file_name_ext_len),
|
|
|
4013 Qfile_name);
|
|
428
|
4014 if (!NILP (b->filename))
|
|
|
4015 {
|
|
442
|
4016 const Extbyte *filename_ext;
|
|
665
|
4017 Bytecount filename_ext_len;
|
|
428
|
4018
|
|
440
|
4019 TO_EXTERNAL_FORMAT (LISP_STRING, b->filename,
|
|
|
4020 ALLOCA, (filename_ext,
|
|
|
4021 filename_ext_len),
|
|
|
4022 Qfile_name);
|
|
428
|
4023 write (listdesc, filename_ext, filename_ext_len);
|
|
|
4024 }
|
|
|
4025 write (listdesc, "\n", 1);
|
|
|
4026 write (listdesc, auto_save_file_name_ext,
|
|
|
4027 auto_save_file_name_ext_len);
|
|
|
4028 write (listdesc, "\n", 1);
|
|
|
4029 }
|
|
|
4030
|
|
|
4031 /* dmoore - In a bad scenario we've set b=XBUFFER(buf)
|
|
|
4032 based on values in Vbuffer_alist. auto_save_1 may
|
|
|
4033 cause lisp handlers to run. Those handlers may kill
|
|
|
4034 the buffer and then GC. Since the buffer is killed,
|
|
|
4035 it's no longer in Vbuffer_alist so it might get reaped
|
|
|
4036 by the GC. We also need to protect tail. */
|
|
|
4037 /* #### There is probably a lot of other code which has
|
|
|
4038 pointers into buffers which may get blown away by
|
|
|
4039 handlers. */
|
|
|
4040 {
|
|
|
4041 struct gcpro ngcpro1, ngcpro2;
|
|
|
4042 NGCPRO2 (buf, tail);
|
|
|
4043 condition_case_1 (Qt,
|
|
|
4044 auto_save_1, Qnil,
|
|
|
4045 auto_save_error, Qnil);
|
|
|
4046 NUNGCPRO;
|
|
|
4047 }
|
|
|
4048 /* Handler killed our saved current-buffer! Pick any. */
|
|
|
4049 if (!BUFFER_LIVE_P (XBUFFER (old)))
|
|
|
4050 XSETBUFFER (old, current_buffer);
|
|
|
4051
|
|
|
4052 set_buffer_internal (XBUFFER (old));
|
|
|
4053 auto_saved++;
|
|
|
4054
|
|
|
4055 /* Handler killed their own buffer! */
|
|
|
4056 if (!BUFFER_LIVE_P(b))
|
|
|
4057 continue;
|
|
|
4058
|
|
|
4059 b->auto_save_modified = BUF_MODIFF (b);
|
|
|
4060 b->saved_size = make_int (BUF_SIZE (b));
|
|
|
4061 EMACS_GET_TIME (after_time);
|
|
|
4062 /* If auto-save took more than 60 seconds,
|
|
|
4063 assume it was an NFS failure that got a timeout. */
|
|
|
4064 if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60)
|
|
|
4065 b->auto_save_failure_time = EMACS_SECS (after_time);
|
|
|
4066 }
|
|
|
4067 }
|
|
|
4068 }
|
|
|
4069
|
|
|
4070 /* Prevent another auto save till enough input events come in. */
|
|
|
4071 if (auto_saved)
|
|
|
4072 record_auto_save ();
|
|
|
4073
|
|
|
4074 /* If we didn't save anything into the listfile, remove the old
|
|
|
4075 one because nothing needed to be auto-saved. Do this afterwards
|
|
|
4076 rather than before in case we get a crash attempting to autosave
|
|
|
4077 (in that case we'd still want the old one around). */
|
|
|
4078 if (listdesc < 0 && !auto_saved && STRINGP (listfile))
|
|
|
4079 unlink ((char *) XSTRING_DATA (listfile));
|
|
|
4080
|
|
|
4081 /* Show "...done" only if the echo area would otherwise be empty. */
|
|
|
4082 if (auto_saved && NILP (no_message)
|
|
|
4083 && NILP (clear_echo_area (selected_frame (), Qauto_saving, 0)))
|
|
|
4084 {
|
|
442
|
4085 static const unsigned char *msg
|
|
|
4086 = (const unsigned char *)"Auto-saving...done";
|
|
428
|
4087 echo_area_message (selected_frame (), msg, Qnil, 0,
|
|
442
|
4088 strlen ((const char *) msg), Qauto_saving);
|
|
428
|
4089 }
|
|
|
4090
|
|
|
4091 Vquit_flag = oquit;
|
|
|
4092
|
|
|
4093 RETURN_UNGCPRO (unbind_to (speccount, Qnil));
|
|
|
4094 }
|
|
|
4095
|
|
|
4096 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, 0, 0, 0, /*
|
|
|
4097 Mark current buffer as auto-saved with its current text.
|
|
|
4098 No auto-save file will be written until the buffer changes again.
|
|
|
4099 */
|
|
|
4100 ())
|
|
|
4101 {
|
|
|
4102 current_buffer->auto_save_modified = BUF_MODIFF (current_buffer);
|
|
|
4103 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer));
|
|
|
4104 current_buffer->auto_save_failure_time = -1;
|
|
|
4105 return Qnil;
|
|
|
4106 }
|
|
|
4107
|
|
|
4108 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, 0, 0, 0, /*
|
|
|
4109 Clear any record of a recent auto-save failure in the current buffer.
|
|
|
4110 */
|
|
|
4111 ())
|
|
|
4112 {
|
|
|
4113 current_buffer->auto_save_failure_time = -1;
|
|
|
4114 return Qnil;
|
|
|
4115 }
|
|
|
4116
|
|
|
4117 DEFUN ("recent-auto-save-p", Frecent_auto_save_p, 0, 0, 0, /*
|
|
|
4118 Return t if buffer has been auto-saved since last read in or saved.
|
|
|
4119 */
|
|
|
4120 ())
|
|
|
4121 {
|
|
|
4122 return (BUF_SAVE_MODIFF (current_buffer) <
|
|
|
4123 current_buffer->auto_save_modified) ? Qt : Qnil;
|
|
|
4124 }
|
|
|
4125
|
|
|
4126
|
|
|
4127 /************************************************************************/
|
|
|
4128 /* initialization */
|
|
|
4129 /************************************************************************/
|
|
|
4130
|
|
|
4131 void
|
|
|
4132 syms_of_fileio (void)
|
|
|
4133 {
|
|
563
|
4134 DEFSYMBOL (Qexpand_file_name);
|
|
|
4135 DEFSYMBOL (Qfile_truename);
|
|
|
4136 DEFSYMBOL (Qsubstitute_in_file_name);
|
|
|
4137 DEFSYMBOL (Qdirectory_file_name);
|
|
|
4138 DEFSYMBOL (Qfile_name_directory);
|
|
|
4139 DEFSYMBOL (Qfile_name_nondirectory);
|
|
|
4140 DEFSYMBOL (Qunhandled_file_name_directory);
|
|
|
4141 DEFSYMBOL (Qfile_name_as_directory);
|
|
|
4142 DEFSYMBOL (Qcopy_file);
|
|
|
4143 DEFSYMBOL (Qmake_directory_internal);
|
|
|
4144 DEFSYMBOL (Qdelete_directory);
|
|
|
4145 DEFSYMBOL (Qdelete_file);
|
|
|
4146 DEFSYMBOL (Qrename_file);
|
|
|
4147 DEFSYMBOL (Qadd_name_to_file);
|
|
|
4148 DEFSYMBOL (Qmake_symbolic_link);
|
|
|
4149 DEFSYMBOL (Qfile_exists_p);
|
|
|
4150 DEFSYMBOL (Qfile_executable_p);
|
|
|
4151 DEFSYMBOL (Qfile_readable_p);
|
|
|
4152 DEFSYMBOL (Qfile_symlink_p);
|
|
|
4153 DEFSYMBOL (Qfile_writable_p);
|
|
|
4154 DEFSYMBOL (Qfile_directory_p);
|
|
|
4155 DEFSYMBOL (Qfile_regular_p);
|
|
|
4156 DEFSYMBOL (Qfile_accessible_directory_p);
|
|
|
4157 DEFSYMBOL (Qfile_modes);
|
|
|
4158 DEFSYMBOL (Qset_file_modes);
|
|
|
4159 DEFSYMBOL (Qfile_newer_than_file_p);
|
|
|
4160 DEFSYMBOL (Qinsert_file_contents);
|
|
|
4161 DEFSYMBOL (Qwrite_region);
|
|
|
4162 DEFSYMBOL (Qverify_visited_file_modtime);
|
|
|
4163 DEFSYMBOL (Qset_visited_file_modtime);
|
|
|
4164 DEFSYMBOL (Qcar_less_than_car); /* Vomitous! */
|
|
|
4165
|
|
|
4166 DEFSYMBOL (Qauto_save_hook);
|
|
|
4167 DEFSYMBOL (Qauto_save_error);
|
|
|
4168 DEFSYMBOL (Qauto_saving);
|
|
|
4169
|
|
|
4170 DEFSYMBOL (Qformat_decode);
|
|
|
4171 DEFSYMBOL (Qformat_annotate_function);
|
|
|
4172
|
|
|
4173 DEFSYMBOL (Qcompute_buffer_file_truename);
|
|
|
4174
|
|
442
|
4175 DEFERROR_STANDARD (Qfile_already_exists, Qfile_error);
|
|
428
|
4176
|
|
|
4177 DEFSUBR (Ffind_file_name_handler);
|
|
|
4178
|
|
|
4179 DEFSUBR (Ffile_name_directory);
|
|
|
4180 DEFSUBR (Ffile_name_nondirectory);
|
|
|
4181 DEFSUBR (Funhandled_file_name_directory);
|
|
|
4182 DEFSUBR (Ffile_name_as_directory);
|
|
|
4183 DEFSUBR (Fdirectory_file_name);
|
|
|
4184 DEFSUBR (Fmake_temp_name);
|
|
|
4185 DEFSUBR (Fexpand_file_name);
|
|
|
4186 DEFSUBR (Ffile_truename);
|
|
|
4187 DEFSUBR (Fsubstitute_in_file_name);
|
|
|
4188 DEFSUBR (Fcopy_file);
|
|
|
4189 DEFSUBR (Fmake_directory_internal);
|
|
|
4190 DEFSUBR (Fdelete_directory);
|
|
|
4191 DEFSUBR (Fdelete_file);
|
|
|
4192 DEFSUBR (Frename_file);
|
|
|
4193 DEFSUBR (Fadd_name_to_file);
|
|
|
4194 DEFSUBR (Fmake_symbolic_link);
|
|
|
4195 #ifdef HPUX_NET
|
|
|
4196 DEFSUBR (Fsysnetunam);
|
|
|
4197 #endif /* HPUX_NET */
|
|
|
4198 DEFSUBR (Ffile_name_absolute_p);
|
|
|
4199 DEFSUBR (Ffile_exists_p);
|
|
|
4200 DEFSUBR (Ffile_executable_p);
|
|
|
4201 DEFSUBR (Ffile_readable_p);
|
|
|
4202 DEFSUBR (Ffile_writable_p);
|
|
|
4203 DEFSUBR (Ffile_symlink_p);
|
|
|
4204 DEFSUBR (Ffile_directory_p);
|
|
|
4205 DEFSUBR (Ffile_accessible_directory_p);
|
|
|
4206 DEFSUBR (Ffile_regular_p);
|
|
|
4207 DEFSUBR (Ffile_modes);
|
|
|
4208 DEFSUBR (Fset_file_modes);
|
|
|
4209 DEFSUBR (Fset_default_file_modes);
|
|
|
4210 DEFSUBR (Fdefault_file_modes);
|
|
|
4211 DEFSUBR (Funix_sync);
|
|
|
4212 DEFSUBR (Ffile_newer_than_file_p);
|
|
|
4213 DEFSUBR (Finsert_file_contents_internal);
|
|
|
4214 DEFSUBR (Fwrite_region_internal);
|
|
|
4215 DEFSUBR (Fcar_less_than_car); /* Vomitous! */
|
|
|
4216 DEFSUBR (Fcdr_less_than_cdr); /* Yeah oh yeah bucko .... */
|
|
|
4217 #if 0
|
|
|
4218 DEFSUBR (Fencrypt_string);
|
|
|
4219 DEFSUBR (Fdecrypt_string);
|
|
|
4220 #endif
|
|
|
4221 DEFSUBR (Fverify_visited_file_modtime);
|
|
|
4222 DEFSUBR (Fclear_visited_file_modtime);
|
|
|
4223 DEFSUBR (Fvisited_file_modtime);
|
|
|
4224 DEFSUBR (Fset_visited_file_modtime);
|
|
|
4225
|
|
|
4226 DEFSUBR (Fdo_auto_save);
|
|
|
4227 DEFSUBR (Fset_buffer_auto_saved);
|
|
|
4228 DEFSUBR (Fclear_buffer_auto_save_failure);
|
|
|
4229 DEFSUBR (Frecent_auto_save_p);
|
|
|
4230 }
|
|
|
4231
|
|
|
4232 void
|
|
|
4233 vars_of_fileio (void)
|
|
|
4234 {
|
|
|
4235 DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format /*
|
|
|
4236 *Format in which to write auto-save files.
|
|
|
4237 Should be a list of symbols naming formats that are defined in `format-alist'.
|
|
|
4238 If it is t, which is the default, auto-save files are written in the
|
|
|
4239 same format as a regular save would use.
|
|
|
4240 */ );
|
|
|
4241 Vauto_save_file_format = Qt;
|
|
|
4242
|
|
|
4243 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist /*
|
|
|
4244 *Alist of elements (REGEXP . HANDLER) for file names handled specially.
|
|
|
4245 If a file name matches REGEXP, then all I/O on that file is done by calling
|
|
|
4246 HANDLER.
|
|
|
4247
|
|
|
4248 The first argument given to HANDLER is the name of the I/O primitive
|
|
|
4249 to be handled; the remaining arguments are the arguments that were
|
|
|
4250 passed to that primitive. For example, if you do
|
|
|
4251 (file-exists-p FILENAME)
|
|
|
4252 and FILENAME is handled by HANDLER, then HANDLER is called like this:
|
|
|
4253 (funcall HANDLER 'file-exists-p FILENAME)
|
|
|
4254 The function `find-file-name-handler' checks this list for a handler
|
|
|
4255 for its argument.
|
|
|
4256 */ );
|
|
|
4257 Vfile_name_handler_alist = Qnil;
|
|
|
4258
|
|
|
4259 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions /*
|
|
|
4260 A list of functions to be called at the end of `insert-file-contents'.
|
|
|
4261 Each is passed one argument, the number of bytes inserted. It should return
|
|
|
4262 the new byte count, and leave point the same. If `insert-file-contents' is
|
|
|
4263 intercepted by a handler from `file-name-handler-alist', that handler is
|
|
|
4264 responsible for calling the after-insert-file-functions if appropriate.
|
|
|
4265 */ );
|
|
|
4266 Vafter_insert_file_functions = Qnil;
|
|
|
4267
|
|
|
4268 DEFVAR_LISP ("write-region-annotate-functions",
|
|
|
4269 &Vwrite_region_annotate_functions /*
|
|
|
4270 A list of functions to be called at the start of `write-region'.
|
|
|
4271 Each is passed two arguments, START and END, as for `write-region'.
|
|
|
4272 It should return a list of pairs (POSITION . STRING) of strings to be
|
|
|
4273 effectively inserted at the specified positions of the file being written
|
|
|
4274 \(1 means to insert before the first byte written). The POSITIONs must be
|
|
|
4275 sorted into increasing order. If there are several functions in the list,
|
|
|
4276 the several lists are merged destructively.
|
|
|
4277 */ );
|
|
|
4278 Vwrite_region_annotate_functions = Qnil;
|
|
|
4279
|
|
|
4280 DEFVAR_LISP ("write-region-annotations-so-far",
|
|
|
4281 &Vwrite_region_annotations_so_far /*
|
|
|
4282 When an annotation function is called, this holds the previous annotations.
|
|
|
4283 These are the annotations made by other annotation functions
|
|
|
4284 that were already called. See also `write-region-annotate-functions'.
|
|
|
4285 */ );
|
|
|
4286 Vwrite_region_annotations_so_far = Qnil;
|
|
|
4287
|
|
|
4288 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers /*
|
|
|
4289 A list of file name handlers that temporarily should not be used.
|
|
|
4290 This applies only to the operation `inhibit-file-name-operation'.
|
|
|
4291 */ );
|
|
|
4292 Vinhibit_file_name_handlers = Qnil;
|
|
|
4293
|
|
|
4294 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation /*
|
|
|
4295 The operation for which `inhibit-file-name-handlers' is applicable.
|
|
|
4296 */ );
|
|
|
4297 Vinhibit_file_name_operation = Qnil;
|
|
|
4298
|
|
|
4299 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name /*
|
|
|
4300 File name in which we write a list of all auto save file names.
|
|
|
4301 */ );
|
|
|
4302 Vauto_save_list_file_name = Qnil;
|
|
|
4303
|
|
444
|
4304 DEFVAR_LISP ("auto-save-list-file-prefix", &Vauto_save_list_file_prefix /*
|
|
|
4305 Prefix for generating auto-save-list-file-name.
|
|
|
4306 Emacs's pid and the system name will be appended to
|
|
|
4307 this prefix to create a unique file name.
|
|
|
4308 */ );
|
|
|
4309 Vauto_save_list_file_prefix = build_string ("~/.saves-");
|
|
|
4310
|
|
|
4311 DEFVAR_BOOL ("inhibit-auto-save-session", &inhibit_auto_save_session /*
|
|
|
4312 When non-nil, inhibit auto save list file creation.
|
|
|
4313 */ );
|
|
|
4314 inhibit_auto_save_session = 0;
|
|
|
4315
|
|
428
|
4316 DEFVAR_BOOL ("disable-auto-save-when-buffer-shrinks",
|
|
|
4317 &disable_auto_save_when_buffer_shrinks /*
|
|
|
4318 If non-nil, auto-saving is disabled when a buffer shrinks too much.
|
|
|
4319 This is to prevent you from losing your edits if you accidentally
|
|
|
4320 delete a large chunk of the buffer and don't notice it until too late.
|
|
|
4321 Saving the buffer normally turns auto-save back on.
|
|
|
4322 */ );
|
|
|
4323 disable_auto_save_when_buffer_shrinks = 1;
|
|
|
4324
|
|
|
4325 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char /*
|
|
|
4326 Directory separator character for built-in functions that return file names.
|
|
|
4327 The value should be either ?/ or ?\\ (any other value is treated as ?\\).
|
|
|
4328 This variable affects the built-in functions only on Windows,
|
|
|
4329 on other platforms, it is initialized so that Lisp code can find out
|
|
|
4330 what the normal separator is.
|
|
|
4331 */ );
|
|
442
|
4332 #ifdef WIN32_NATIVE
|
|
432
|
4333 Vdirectory_sep_char = make_char ('\\');
|
|
|
4334 #else
|
|
442
|
4335 Vdirectory_sep_char = make_char ('/');
|
|
432
|
4336 #endif
|
|
442
|
4337
|
|
|
4338 reinit_vars_of_fileio ();
|
|
428
|
4339 }
|
|
442
|
4340
|
|
|
4341 void
|
|
|
4342 reinit_vars_of_fileio (void)
|
|
|
4343 {
|
|
|
4344 /* We want temp_name_rand to be initialized to a value likely to be
|
|
|
4345 unique to the process, not to the executable. The danger is that
|
|
|
4346 two different XEmacs processes using the same binary on different
|
|
|
4347 machines creating temp files in the same directory will be
|
|
|
4348 unlucky enough to have the same pid. If we randomize using
|
|
|
4349 process startup time, then in practice they will be unlikely to
|
|
|
4350 collide. We use the microseconds field so that scripts that start
|
|
|
4351 simultaneous XEmacs processes on multiple machines will have less
|
|
|
4352 chance of collision. */
|
|
|
4353 {
|
|
|
4354 EMACS_TIME thyme;
|
|
|
4355
|
|
|
4356 EMACS_GET_TIME (thyme);
|
|
|
4357 temp_name_rand = (unsigned int) (EMACS_SECS (thyme) ^ EMACS_USECS (thyme));
|
|
|
4358 }
|
|
|
4359 }
|
