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