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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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3 Copyright (C) 1996 Ben Wing.
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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 #include <limits.h>
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28
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29 #include "buffer.h"
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30 #include "events.h"
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31 #include "frame.h"
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32 #include "insdel.h"
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33 #include "lstream.h"
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34 #include "redisplay.h"
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35 #include "sysdep.h"
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36 #include "window.h" /* minibuf_level */
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37 #ifdef FILE_CODING
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38 #include "file-coding.h"
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39 #endif
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40
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41 #ifdef HAVE_LIBGEN_H /* Must come before sysfile.h */
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42 #include <libgen.h>
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43 #endif
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44 #include "sysfile.h"
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45 #include "sysproc.h"
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46 #include "syspwd.h"
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47 #include "systime.h"
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48 #include "sysdir.h"
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49
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50 #ifdef HPUX
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51 #include <netio.h>
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52 #ifdef HPUX_PRE_8_0
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53 #include <errnet.h>
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54 #endif /* HPUX_PRE_8_0 */
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55 #endif /* HPUX */
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56
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57 #ifdef WINDOWSNT
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58 #define NOMINMAX 1
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59 #include <windows.h>
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60 #include <direct.h>
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61 #include <fcntl.h>
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62 #include <stdlib.h>
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63 #endif /* not WINDOWSNT */
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64
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65 #ifdef WINDOWSNT
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66 #define CORRECT_DIR_SEPS(s) \
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67 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
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68 else unixtodos_filename (s); \
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69 } while (0)
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70 #define IS_DRIVE(x) isalpha (x)
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71 /* Need to lower-case the drive letter, or else expanded
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72 filenames will sometimes compare inequal, because
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73 `expand-file-name' doesn't always down-case the drive letter. */
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74 #define DRIVE_LETTER(x) tolower (x)
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75 #endif /* WINDOWSNT */
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76
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77 int lisp_to_time (Lisp_Object, time_t *);
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78 Lisp_Object time_to_lisp (time_t);
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79
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80 /* Nonzero during writing of auto-save files */
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81 static int auto_saving;
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82
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83 /* Set by auto_save_1 to mode of original file so Fwrite_region_internal
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84 will create a new file with the same mode as the original */
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85 static int auto_save_mode_bits;
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86
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87 /* Alist of elements (REGEXP . HANDLER) for file names
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88 whose I/O is done with a special handler. */
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89 Lisp_Object Vfile_name_handler_alist;
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90
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91 /* Format for auto-save files */
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92 Lisp_Object Vauto_save_file_format;
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93
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94 /* Lisp functions for translating file formats */
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95 Lisp_Object Qformat_decode, Qformat_annotate_function;
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96
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97 /* Functions to be called to process text properties in inserted file. */
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98 Lisp_Object Vafter_insert_file_functions;
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99
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100 /* Functions to be called to create text property annotations for file. */
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101 Lisp_Object Vwrite_region_annotate_functions;
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102
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103 /* During build_annotations, each time an annotation function is called,
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104 this holds the annotations made by the previous functions. */
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105 Lisp_Object Vwrite_region_annotations_so_far;
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106
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107 /* File name in which we write a list of all our auto save files. */
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108 Lisp_Object Vauto_save_list_file_name;
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109
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110 int disable_auto_save_when_buffer_shrinks;
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111
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112 Lisp_Object Vdirectory_sep_char;
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113
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114 /* These variables describe handlers that have "already" had a chance
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115 to handle the current operation.
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116
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117 Vinhibit_file_name_handlers is a list of file name handlers.
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118 Vinhibit_file_name_operation is the operation being handled.
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119 If we try to handle that operation, we ignore those handlers. */
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120
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121 static Lisp_Object Vinhibit_file_name_handlers;
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122 static Lisp_Object Vinhibit_file_name_operation;
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123
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124 Lisp_Object Qfile_error, Qfile_already_exists;
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125
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126 Lisp_Object Qauto_save_hook;
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127 Lisp_Object Qauto_save_error;
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128 Lisp_Object Qauto_saving;
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129
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130 Lisp_Object Qcar_less_than_car;
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131
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132 Lisp_Object Qcompute_buffer_file_truename;
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133
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134 EXFUN (Frunning_temacs_p, 0);
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135
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136 /* signal a file error when errno contains a meaningful value. */
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137
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138 DOESNT_RETURN
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139 report_file_error (CONST char *string, Lisp_Object data)
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140 {
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141 /* #### dmoore - This uses current_buffer, better make sure no one
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142 has GC'd the current buffer. File handlers are giving me a headache
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143 maybe I'll just always protect current_buffer around all of those
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144 calls. */
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145
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146 signal_error (Qfile_error,
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147 Fcons (build_translated_string (string),
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148 Fcons (lisp_strerror (errno), data)));
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149 }
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150
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151 void
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152 maybe_report_file_error (CONST char *string, Lisp_Object data,
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153 Lisp_Object class, Error_behavior errb)
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154 {
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155 /* Optimization: */
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156 if (ERRB_EQ (errb, ERROR_ME_NOT))
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157 return;
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158
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159 maybe_signal_error (Qfile_error,
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160 Fcons (build_translated_string (string),
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161 Fcons (lisp_strerror (errno), data)),
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162 class, errb);
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163 }
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164
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165 /* signal a file error when errno does not contain a meaningful value. */
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166
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167 DOESNT_RETURN
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168 signal_file_error (CONST char *string, Lisp_Object data)
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169 {
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170 signal_error (Qfile_error,
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171 list2 (build_translated_string (string), data));
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172 }
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173
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174 void
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175 maybe_signal_file_error (CONST char *string, Lisp_Object data,
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176 Lisp_Object class, Error_behavior errb)
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177 {
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178 /* Optimization: */
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179 if (ERRB_EQ (errb, ERROR_ME_NOT))
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180 return;
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181 maybe_signal_error (Qfile_error,
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182 list2 (build_translated_string (string), data),
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183 class, errb);
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184 }
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185
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186 DOESNT_RETURN
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187 signal_double_file_error (CONST char *string1, CONST char *string2,
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188 Lisp_Object data)
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189 {
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190 signal_error (Qfile_error,
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191 list3 (build_translated_string (string1),
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192 build_translated_string (string2),
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193 data));
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194 }
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195
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196 void
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197 maybe_signal_double_file_error (CONST char *string1, CONST char *string2,
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198 Lisp_Object data, Lisp_Object class,
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199 Error_behavior errb)
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200 {
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201 /* Optimization: */
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202 if (ERRB_EQ (errb, ERROR_ME_NOT))
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203 return;
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204 maybe_signal_error (Qfile_error,
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205 list3 (build_translated_string (string1),
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206 build_translated_string (string2),
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207 data),
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208 class, errb);
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209 }
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210
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211 DOESNT_RETURN
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212 signal_double_file_error_2 (CONST char *string1, CONST char *string2,
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213 Lisp_Object data1, Lisp_Object data2)
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214 {
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215 signal_error (Qfile_error,
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216 list4 (build_translated_string (string1),
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217 build_translated_string (string2),
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218 data1, data2));
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219 }
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220
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221 void
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222 maybe_signal_double_file_error_2 (CONST char *string1, CONST char *string2,
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223 Lisp_Object data1, Lisp_Object data2,
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224 Lisp_Object class, Error_behavior errb)
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225 {
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226 /* Optimization: */
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227 if (ERRB_EQ (errb, ERROR_ME_NOT))
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228 return;
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229 maybe_signal_error (Qfile_error,
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230 list4 (build_translated_string (string1),
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231 build_translated_string (string2),
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232 data1, data2),
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233 class, errb);
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234 }
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235
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236
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237 /* Just like strerror(3), except return a lisp string instead of char *.
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238 The string needs to be converted since it may be localized.
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239 Perhaps this should use strerror-coding-system instead? */
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240 Lisp_Object
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241 lisp_strerror (int errnum)
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242 {
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243 return build_ext_string (strerror (errnum), FORMAT_NATIVE);
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244 }
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245
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246 static Lisp_Object
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247 close_file_unwind (Lisp_Object fd)
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248 {
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249 if (CONSP (fd))
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250 {
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251 if (INTP (XCAR (fd)))
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252 close (XINT (XCAR (fd)));
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253
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254 free_cons (XCONS (fd));
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255 }
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256 else
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257 close (XINT (fd));
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258
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259 return Qnil;
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260 }
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261
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262 static Lisp_Object
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263 delete_stream_unwind (Lisp_Object stream)
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264 {
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265 Lstream_delete (XLSTREAM (stream));
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266 return Qnil;
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267 }
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268
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269 /* Restore point, having saved it as a marker. */
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270
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271 static Lisp_Object
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272 restore_point_unwind (Lisp_Object point_marker)
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273 {
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274 BUF_SET_PT (current_buffer, marker_position (point_marker));
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275 return Fset_marker (point_marker, Qnil, Qnil);
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276 }
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277
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278 /* Versions of read() and write() that allow quitting out of the actual
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279 I/O. We don't use immediate_quit (i.e. direct longjmp() out of the
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280 signal handler) because that's way too losing.
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281
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282 (#### Actually, longjmp()ing out of the signal handler may not be
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283 as losing as I thought. See sys_do_signal() in sysdep.c.) */
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284
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285 ssize_t
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286 read_allowing_quit (int fildes, void *buf, size_t size)
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287 {
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288 QUIT;
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289 return sys_read_1 (fildes, buf, size, 1);
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290 }
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291
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292 ssize_t
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293 write_allowing_quit (int fildes, CONST void *buf, size_t size)
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294 {
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295 QUIT;
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296 return sys_write_1 (fildes, buf, size, 1);
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297 }
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298
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299
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300 Lisp_Object Qexpand_file_name;
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301 Lisp_Object Qfile_truename;
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302 Lisp_Object Qsubstitute_in_file_name;
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303 Lisp_Object Qdirectory_file_name;
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304 Lisp_Object Qfile_name_directory;
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305 Lisp_Object Qfile_name_nondirectory;
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306 Lisp_Object Qunhandled_file_name_directory;
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307 Lisp_Object Qfile_name_as_directory;
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308 Lisp_Object Qcopy_file;
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309 Lisp_Object Qmake_directory_internal;
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310 Lisp_Object Qdelete_directory;
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311 Lisp_Object Qdelete_file;
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312 Lisp_Object Qrename_file;
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313 Lisp_Object Qadd_name_to_file;
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314 Lisp_Object Qmake_symbolic_link;
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315 Lisp_Object Qfile_exists_p;
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316 Lisp_Object Qfile_executable_p;
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317 Lisp_Object Qfile_readable_p;
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318 Lisp_Object Qfile_symlink_p;
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319 Lisp_Object Qfile_writable_p;
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320 Lisp_Object Qfile_directory_p;
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321 Lisp_Object Qfile_regular_p;
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322 Lisp_Object Qfile_accessible_directory_p;
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323 Lisp_Object Qfile_modes;
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324 Lisp_Object Qset_file_modes;
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325 Lisp_Object Qfile_newer_than_file_p;
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326 Lisp_Object Qinsert_file_contents;
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327 Lisp_Object Qwrite_region;
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328 Lisp_Object Qverify_visited_file_modtime;
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329 Lisp_Object Qset_visited_file_modtime;
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330
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331 /* If FILENAME is handled specially on account of its syntax,
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332 return its handler function. Otherwise, return nil. */
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333
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334 DEFUN ("find-file-name-handler", Ffind_file_name_handler, 1, 2, 0, /*
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335 Return FILENAME's handler function for OPERATION, if it has one.
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336 Otherwise, return nil.
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337 A file name is handled if one of the regular expressions in
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338 `file-name-handler-alist' matches it.
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339
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340 If OPERATION equals `inhibit-file-name-operation', then we ignore
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341 any handlers that are members of `inhibit-file-name-handlers',
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342 but we still do run any other handlers. This lets handlers
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343 use the standard functions without calling themselves recursively.
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344 */
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345 (filename, operation))
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346 {
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347 /* This function does not GC */
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348 /* This function can be called during GC */
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349 /* This function must not munge the match data. */
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350 Lisp_Object chain, inhibited_handlers;
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351
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352 CHECK_STRING (filename);
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353
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354 if (EQ (operation, Vinhibit_file_name_operation))
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355 inhibited_handlers = Vinhibit_file_name_handlers;
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356 else
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357 inhibited_handlers = Qnil;
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358
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359 EXTERNAL_LIST_LOOP (chain, Vfile_name_handler_alist)
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360 {
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361 Lisp_Object elt = XCAR (chain);
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362 if (CONSP (elt))
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363 {
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364 Lisp_Object string = XCAR (elt);
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365 if (STRINGP (string)
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366 && (fast_lisp_string_match (string, filename) >= 0))
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367 {
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368 Lisp_Object handler = XCDR (elt);
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369 if (NILP (Fmemq (handler, inhibited_handlers)))
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370 return handler;
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371 }
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372 }
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373 QUIT;
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374 }
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375 return Qnil;
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376 }
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377
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378 static Lisp_Object
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379 call2_check_string (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1)
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380 {
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381 /* This function can call lisp */
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382 Lisp_Object result = call2 (fn, arg0, arg1);
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383 CHECK_STRING (result);
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384 return result;
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385 }
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386
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387 static Lisp_Object
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388 call2_check_string_or_nil (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1)
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389 {
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390 /* This function can call lisp */
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391 Lisp_Object result = call2 (fn, arg0, arg1);
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392 if (!NILP (result))
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393 CHECK_STRING (result);
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394 return result;
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395 }
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396
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397 static Lisp_Object
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398 call3_check_string (Lisp_Object fn, Lisp_Object arg0,
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399 Lisp_Object arg1, Lisp_Object arg2)
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400 {
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401 /* This function can call lisp */
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402 Lisp_Object result = call3 (fn, arg0, arg1, arg2);
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403 CHECK_STRING (result);
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404 return result;
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405 }
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406
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407
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|
|
408 DEFUN ("file-name-directory", Ffile_name_directory, 1, 1, 0, /*
|
|
|
409 Return the directory component in file name NAME.
|
|
|
410 Return nil if NAME does not include a directory.
|
|
|
411 Otherwise return a directory spec.
|
|
|
412 Given a Unix syntax file name, returns a string ending in slash.
|
|
|
413 */
|
|
|
414 (file))
|
|
|
415 {
|
|
|
416 /* This function can GC. GC checked 1997.04.06. */
|
|
|
417 Bufbyte *beg;
|
|
|
418 Bufbyte *p;
|
|
|
419 Lisp_Object handler;
|
|
|
420
|
|
|
421 CHECK_STRING (file);
|
|
|
422
|
|
|
423 /* If the file name has special constructs in it,
|
|
|
424 call the corresponding file handler. */
|
|
|
425 handler = Ffind_file_name_handler (file, Qfile_name_directory);
|
|
|
426 if (!NILP (handler))
|
|
|
427 return call2_check_string_or_nil (handler, Qfile_name_directory, file);
|
|
|
428
|
|
|
429 #ifdef FILE_SYSTEM_CASE
|
|
|
430 file = FILE_SYSTEM_CASE (file);
|
|
|
431 #endif
|
|
|
432 beg = XSTRING_DATA (file);
|
|
|
433 p = beg + XSTRING_LENGTH (file);
|
|
|
434
|
|
|
435 while (p != beg && !IS_ANY_SEP (p[-1])
|
|
|
436 #ifdef WINDOWSNT
|
|
|
437 /* only recognize drive specifier at beginning */
|
|
|
438 && !(p[-1] == ':' && p == beg + 2)
|
|
|
439 #endif
|
|
|
440 ) p--;
|
|
|
441
|
|
|
442 if (p == beg)
|
|
|
443 return Qnil;
|
|
|
444 #ifdef WINDOWSNT
|
|
|
445 /* Expansion of "c:" to drive and default directory. */
|
|
|
446 /* (NT does the right thing.) */
|
|
|
447 if (p == beg + 2 && beg[1] == ':')
|
|
|
448 {
|
|
|
449 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
|
|
|
450 Bufbyte *res = alloca (MAXPATHLEN + 1);
|
|
|
451 if (getdefdir (toupper (*beg) - 'A' + 1, res))
|
|
|
452 {
|
|
|
453 char *c=((char *) res) + strlen ((char *) res);
|
|
|
454 if (!IS_DIRECTORY_SEP (*c))
|
|
|
455 {
|
|
|
456 *c++ = DIRECTORY_SEP;
|
|
|
457 *c = '\0';
|
|
|
458 }
|
|
|
459 beg = res;
|
|
|
460 p = beg + strlen ((char *) beg);
|
|
|
461 }
|
|
|
462 }
|
|
|
463 #endif /* WINDOWSNT */
|
|
|
464 return make_string (beg, p - beg);
|
|
|
465 }
|
|
|
466
|
|
|
467 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, 1, 1, 0, /*
|
|
|
468 Return file name NAME sans its directory.
|
|
|
469 For example, in a Unix-syntax file name,
|
|
|
470 this is everything after the last slash,
|
|
|
471 or the entire name if it contains no slash.
|
|
|
472 */
|
|
|
473 (file))
|
|
|
474 {
|
|
|
475 /* This function can GC. GC checked 1997.04.06. */
|
|
|
476 Bufbyte *beg, *p, *end;
|
|
|
477 Lisp_Object handler;
|
|
|
478
|
|
|
479 CHECK_STRING (file);
|
|
|
480
|
|
|
481 /* If the file name has special constructs in it,
|
|
|
482 call the corresponding file handler. */
|
|
|
483 handler = Ffind_file_name_handler (file, Qfile_name_nondirectory);
|
|
|
484 if (!NILP (handler))
|
|
|
485 return call2_check_string (handler, Qfile_name_nondirectory, file);
|
|
|
486
|
|
|
487 beg = XSTRING_DATA (file);
|
|
|
488 end = p = beg + XSTRING_LENGTH (file);
|
|
|
489
|
|
|
490 while (p != beg && !IS_ANY_SEP (p[-1])
|
|
|
491 #ifdef WINDOWSNT
|
|
|
492 /* only recognize drive specifier at beginning */
|
|
|
493 && !(p[-1] == ':' && p == beg + 2)
|
|
|
494 #endif
|
|
|
495 ) p--;
|
|
|
496
|
|
|
497 return make_string (p, end - p);
|
|
|
498 }
|
|
|
499
|
|
|
500 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, 1, 1, 0, /*
|
|
|
501 Return a directly usable directory name somehow associated with FILENAME.
|
|
|
502 A `directly usable' directory name is one that may be used without the
|
|
|
503 intervention of any file handler.
|
|
|
504 If FILENAME is a directly usable file itself, return
|
|
|
505 \(file-name-directory FILENAME).
|
|
|
506 The `call-process' and `start-process' functions use this function to
|
|
|
507 get a current directory to run processes in.
|
|
|
508 */
|
|
|
509 (filename))
|
|
|
510 {
|
|
|
511 /* This function can GC. GC checked 1997.04.06. */
|
|
|
512 Lisp_Object handler;
|
|
|
513
|
|
|
514 /* If the file name has special constructs in it,
|
|
|
515 call the corresponding file handler. */
|
|
|
516 handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory);
|
|
|
517 if (!NILP (handler))
|
|
|
518 return call2 (handler, Qunhandled_file_name_directory,
|
|
|
519 filename);
|
|
|
520
|
|
|
521 return Ffile_name_directory (filename);
|
|
|
522 }
|
|
|
523
|
|
|
524
|
|
|
525 static char *
|
|
|
526 file_name_as_directory (char *out, char *in)
|
|
|
527 {
|
|
|
528 int size = strlen (in);
|
|
|
529
|
|
|
530 if (size == 0)
|
|
|
531 {
|
|
|
532 out[0] = '.';
|
|
|
533 out[1] = DIRECTORY_SEP;
|
|
|
534 out[2] = '\0';
|
|
|
535 }
|
|
|
536 else
|
|
|
537 {
|
|
|
538 strcpy (out, in);
|
|
|
539 /* Append a slash if necessary */
|
|
|
540 if (!IS_ANY_SEP (out[size-1]))
|
|
|
541 {
|
|
|
542 out[size] = DIRECTORY_SEP;
|
|
|
543 out[size + 1] = '\0';
|
|
|
544 }
|
|
|
545 }
|
|
|
546 return out;
|
|
|
547 }
|
|
|
548
|
|
|
549 DEFUN ("file-name-as-directory", Ffile_name_as_directory, 1, 1, 0, /*
|
|
|
550 Return a string representing file FILENAME interpreted as a directory.
|
|
|
551 This operation exists because a directory is also a file, but its name as
|
|
|
552 a directory is different from its name as a file.
|
|
|
553 The result can be used as the value of `default-directory'
|
|
|
554 or passed as second argument to `expand-file-name'.
|
|
|
555 For a Unix-syntax file name, just appends a slash,
|
|
|
556 except for (file-name-as-directory \"\") => \"./\".
|
|
|
557 */
|
|
|
558 (file))
|
|
|
559 {
|
|
|
560 /* This function can GC. GC checked 1997.04.06. */
|
|
|
561 char *buf;
|
|
|
562 Lisp_Object handler;
|
|
|
563
|
|
|
564 CHECK_STRING (file);
|
|
|
565
|
|
|
566 /* If the file name has special constructs in it,
|
|
|
567 call the corresponding file handler. */
|
|
|
568 handler = Ffind_file_name_handler (file, Qfile_name_as_directory);
|
|
|
569 if (!NILP (handler))
|
|
|
570 return call2_check_string (handler, Qfile_name_as_directory, file);
|
|
|
571
|
|
|
572 buf = (char *) alloca (XSTRING_LENGTH (file) + 10);
|
|
|
573 return build_string (file_name_as_directory
|
|
|
574 (buf, (char *) XSTRING_DATA (file)));
|
|
|
575 }
|
|
|
576
|
|
|
577 /*
|
|
|
578 * Convert from directory name to filename.
|
|
|
579 * On UNIX, it's simple: just make sure there isn't a terminating /
|
|
|
580 *
|
|
|
581 * Value is nonzero if the string output is different from the input.
|
|
|
582 */
|
|
|
583
|
|
|
584 static int
|
|
|
585 directory_file_name (CONST char *src, char *dst)
|
|
|
586 {
|
|
|
587 long slen;
|
|
|
588
|
|
|
589 slen = strlen (src);
|
|
|
590 /* Process as Unix format: just remove any final slash.
|
|
|
591 But leave "/" unchanged; do not change it to "". */
|
|
|
592 strcpy (dst, src);
|
|
|
593 #ifdef APOLLO
|
|
|
594 /* Handle // as root for apollo's. */
|
|
|
595 if ((slen > 2 && dst[slen - 1] == '/')
|
|
|
596 || (slen > 1 && dst[0] != '/' && dst[slen - 1] == '/'))
|
|
|
597 dst[slen - 1] = 0;
|
|
|
598 #else
|
|
|
599 if (slen > 1
|
|
|
600 && IS_DIRECTORY_SEP (dst[slen - 1])
|
|
|
601 #ifdef WINDOWSNT
|
|
|
602 && !IS_ANY_SEP (dst[slen - 2])
|
|
|
603 #endif /* WINDOWSNT */
|
|
|
604 )
|
|
|
605 dst[slen - 1] = 0;
|
|
|
606 #endif /* APOLLO */
|
|
|
607 return 1;
|
|
|
608 }
|
|
|
609
|
|
|
610 DEFUN ("directory-file-name", Fdirectory_file_name, 1, 1, 0, /*
|
|
|
611 Return the file name of the directory named DIR.
|
|
|
612 This is the name of the file that holds the data for the directory DIR.
|
|
|
613 This operation exists because a directory is also a file, but its name as
|
|
|
614 a directory is different from its name as a file.
|
|
|
615 In Unix-syntax, this function just removes the final slash.
|
|
|
616 */
|
|
|
617 (directory))
|
|
|
618 {
|
|
|
619 /* This function can GC. GC checked 1997.04.06. */
|
|
|
620 char *buf;
|
|
|
621 Lisp_Object handler;
|
|
|
622
|
|
|
623 CHECK_STRING (directory);
|
|
|
624
|
|
|
625 #if 0 /* #### WTF? */
|
|
|
626 if (NILP (directory))
|
|
|
627 return Qnil;
|
|
|
628 #endif
|
|
|
629
|
|
|
630 /* If the file name has special constructs in it,
|
|
|
631 call the corresponding file handler. */
|
|
|
632 handler = Ffind_file_name_handler (directory, Qdirectory_file_name);
|
|
|
633 if (!NILP (handler))
|
|
|
634 return call2_check_string (handler, Qdirectory_file_name, directory);
|
|
|
635 buf = (char *) alloca (XSTRING_LENGTH (directory) + 20);
|
|
|
636 directory_file_name ((char *) XSTRING_DATA (directory), buf);
|
|
|
637 return build_string (buf);
|
|
|
638 }
|
|
|
639
|
|
|
640 /* Fmake_temp_name used to be a simple wrapper around mktemp(), but it
|
|
|
641 proved too broken for our purposes (it supported only 26 or 62
|
|
|
642 unique names under some implementations). For example, this
|
|
|
643 arbitrary limit broke generation of Gnus Incoming* files.
|
|
|
644
|
|
|
645 This implementation is better than what one usually finds in libc.
|
|
|
646 --hniksic */
|
|
|
647
|
|
|
648 DEFUN ("make-temp-name", Fmake_temp_name, 1, 1, 0, /*
|
|
|
649 Generate temporary file name starting with PREFIX.
|
|
|
650 The Emacs process number forms part of the result, so there is no
|
|
|
651 danger of generating a name being used by another process.
|
|
|
652
|
|
|
653 In addition, this function makes an attempt to choose a name that
|
|
|
654 does not specify an existing file. To make this work, PREFIX should
|
|
|
655 be an absolute file name.
|
|
|
656 */
|
|
|
657 (prefix))
|
|
|
658 {
|
|
|
659 static char tbl[64] = {
|
|
|
660 'A','B','C','D','E','F','G','H',
|
|
|
661 'I','J','K','L','M','N','O','P',
|
|
|
662 'Q','R','S','T','U','V','W','X',
|
|
|
663 'Y','Z','a','b','c','d','e','f',
|
|
|
664 'g','h','i','j','k','l','m','n',
|
|
|
665 'o','p','q','r','s','t','u','v',
|
|
|
666 'w','x','y','z','0','1','2','3',
|
|
|
667 '4','5','6','7','8','9','-','_' };
|
|
|
668 static unsigned count, count_initialized_p;
|
|
|
669
|
|
|
670 Lisp_Object val;
|
|
|
671 Bytecount len;
|
|
|
672 Bufbyte *p, *data;
|
|
|
673 unsigned pid;
|
|
|
674
|
|
|
675 CHECK_STRING (prefix);
|
|
|
676
|
|
|
677 /* I was tempted to apply Fexpand_file_name on PREFIX here, but it's
|
|
|
678 a bad idea because:
|
|
|
679
|
|
|
680 1) It might change the prefix, so the resulting string might not
|
|
|
681 begin with PREFIX. This violates the principle of least
|
|
|
682 surprise.
|
|
|
683
|
|
|
684 2) It breaks under many unforeseeable circumstances, such as with
|
|
|
685 the code that uses (make-temp-name "") instead of
|
|
|
686 (make-temp-name "./").
|
|
|
687
|
|
|
688 3) It might yield unexpected (to stat(2)) results in the presence
|
|
|
689 of EFS and file name handlers. */
|
|
|
690
|
|
|
691 len = XSTRING_LENGTH (prefix);
|
|
|
692 val = make_uninit_string (len + 6);
|
|
|
693 data = XSTRING_DATA (val);
|
|
|
694 memcpy (data, XSTRING_DATA (prefix), len);
|
|
|
695 p = data + len;
|
|
|
696
|
|
|
697 /* VAL is created by adding 6 characters to PREFIX. The first three
|
|
|
698 are the PID of this process, in base 64, and the second three are
|
|
|
699 incremented if the file already exists. This ensures 262144
|
|
|
700 unique file names per PID per PREFIX. */
|
|
|
701
|
|
|
702 pid = (unsigned)getpid ();
|
|
|
703 *p++ = tbl[pid & 63], pid >>= 6;
|
|
|
704 *p++ = tbl[pid & 63], pid >>= 6;
|
|
|
705 *p++ = tbl[pid & 63], pid >>= 6;
|
|
|
706
|
|
|
707 /* Here we try to minimize useless stat'ing when this function is
|
|
|
708 invoked many times successively with the same PREFIX. We achieve
|
|
|
709 this by initializing count to a random value, and incrementing it
|
|
|
710 afterwards. */
|
|
|
711 if (!count_initialized_p)
|
|
|
712 {
|
|
|
713 count = (unsigned)time (NULL);
|
|
|
714 /* Dumping temacs with a non-zero count_initialized_p wouldn't
|
|
|
715 make much sense. */
|
|
|
716 if (NILP (Frunning_temacs_p ()))
|
|
|
717 count_initialized_p = 1;
|
|
|
718 }
|
|
|
719
|
|
|
720 while (1)
|
|
|
721 {
|
|
|
722 struct stat ignored;
|
|
|
723 unsigned num = count;
|
|
|
724
|
|
|
725 p[0] = tbl[num & 63], num >>= 6;
|
|
|
726 p[1] = tbl[num & 63], num >>= 6;
|
|
|
727 p[2] = tbl[num & 63], num >>= 6;
|
|
|
728
|
|
|
729 /* Poor man's congruential RN generator. Replace with ++count
|
|
|
730 for debugging. */
|
|
|
731 count += 25229;
|
|
|
732 count %= 225307;
|
|
|
733
|
|
|
734 QUIT;
|
|
|
735
|
|
|
736 if (stat ((CONST char *) data, &ignored) < 0)
|
|
|
737 {
|
|
|
738 /* We want to return only if errno is ENOENT. */
|
|
|
739 if (errno == ENOENT)
|
|
|
740 return val;
|
|
|
741
|
|
|
742 /* The error here is dubious, but there is little else we
|
|
|
743 can do. The alternatives are to return nil, which is
|
|
|
744 as bad as (and in many cases worse than) throwing the
|
|
|
745 error, or to ignore the error, which will likely result
|
|
|
746 in inflooping. */
|
|
|
747 report_file_error ("Cannot create temporary name for prefix",
|
|
|
748 list1 (prefix));
|
|
|
749 return Qnil; /* not reached */
|
|
|
750 }
|
|
|
751 }
|
|
|
752 }
|
|
|
753
|
|
|
754
|
|
|
755 DEFUN ("expand-file-name", Fexpand_file_name, 1, 2, 0, /*
|
|
|
756 Convert filename NAME to absolute, and canonicalize it.
|
|
|
757 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
|
|
|
758 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing,
|
|
|
759 the current buffer's value of default-directory is used.
|
|
|
760 File name components that are `.' are removed, and
|
|
|
761 so are file name components followed by `..', along with the `..' itself;
|
|
|
762 note that these simplifications are done without checking the resulting
|
|
|
763 file names in the file system.
|
|
|
764 An initial `~/' expands to your home directory.
|
|
|
765 An initial `~USER/' expands to USER's home directory.
|
|
|
766 See also the function `substitute-in-file-name'.
|
|
|
767 */
|
|
|
768 (name, default_directory))
|
|
|
769 {
|
|
|
770 /* This function can GC */
|
|
|
771 Bufbyte *nm;
|
|
|
772
|
|
|
773 Bufbyte *newdir, *p, *o;
|
|
|
774 int tlen;
|
|
|
775 Bufbyte *target;
|
|
|
776 #ifdef WINDOWSNT
|
|
|
777 int drive = 0;
|
|
|
778 int collapse_newdir = 1;
|
|
|
779 #else
|
|
|
780 struct passwd *pw;
|
|
|
781 #endif /* WINDOWSNT */
|
|
|
782 int length;
|
|
|
783 Lisp_Object handler;
|
|
|
784 #ifdef __CYGWIN32__
|
|
|
785 char *user;
|
|
|
786 #endif
|
|
|
787
|
|
|
788 CHECK_STRING (name);
|
|
|
789
|
|
|
790 /* If the file name has special constructs in it,
|
|
|
791 call the corresponding file handler. */
|
|
|
792 handler = Ffind_file_name_handler (name, Qexpand_file_name);
|
|
|
793 if (!NILP (handler))
|
|
|
794 return call3_check_string (handler, Qexpand_file_name, name,
|
|
|
795 default_directory);
|
|
|
796
|
|
|
797 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
|
|
|
798 if (NILP (default_directory))
|
|
|
799 default_directory = current_buffer->directory;
|
|
|
800 if (! STRINGP (default_directory))
|
|
|
801 default_directory = build_string ("/");
|
|
|
802
|
|
|
803 if (!NILP (default_directory))
|
|
|
804 {
|
|
|
805 handler = Ffind_file_name_handler (default_directory, Qexpand_file_name);
|
|
|
806 if (!NILP (handler))
|
|
|
807 return call3 (handler, Qexpand_file_name, name, default_directory);
|
|
|
808 }
|
|
|
809
|
|
|
810 o = XSTRING_DATA (default_directory);
|
|
|
811
|
|
|
812 /* Make sure DEFAULT_DIRECTORY is properly expanded.
|
|
|
813 It would be better to do this down below where we actually use
|
|
|
814 default_directory. Unfortunately, calling Fexpand_file_name recursively
|
|
|
815 could invoke GC, and the strings might be relocated. This would
|
|
|
816 be annoying because we have pointers into strings lying around
|
|
|
817 that would need adjusting, and people would add new pointers to
|
|
|
818 the code and forget to adjust them, resulting in intermittent bugs.
|
|
|
819 Putting this call here avoids all that crud.
|
|
|
820
|
|
|
821 The EQ test avoids infinite recursion. */
|
|
|
822 if (! NILP (default_directory) && !EQ (default_directory, name)
|
|
|
823 /* Save time in some common cases - as long as default_directory
|
|
|
824 is not relative, it can be canonicalized with name below (if it
|
|
|
825 is needed at all) without requiring it to be expanded now. */
|
|
|
826 #ifdef WINDOWSNT
|
|
|
827 /* Detect MSDOS file names with drive specifiers. */
|
|
|
828 && ! (IS_DRIVE (o[0]) && (IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2])))
|
|
|
829 /* Detect Windows file names in UNC format. */
|
|
|
830 && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1]))
|
|
|
831
|
|
|
832 #else /* not WINDOWSNT */
|
|
|
833
|
|
|
834 /* Detect Unix absolute file names (/... alone is not absolute on
|
|
|
835 DOS or Windows). */
|
|
|
836 && ! (IS_DIRECTORY_SEP (o[0]))
|
|
|
837 #endif /* not WINDOWSNT */
|
|
|
838 )
|
|
|
839 {
|
|
|
840 struct gcpro gcpro1;
|
|
|
841
|
|
|
842 GCPRO1 (name);
|
|
|
843 default_directory = Fexpand_file_name (default_directory, Qnil);
|
|
|
844 UNGCPRO;
|
|
|
845 }
|
|
|
846
|
|
|
847 #ifdef FILE_SYSTEM_CASE
|
|
|
848 name = FILE_SYSTEM_CASE (name);
|
|
|
849 #endif
|
|
|
850
|
|
|
851 /* #### dmoore - this is ugly, clean this up. Looks like nm pointing
|
|
|
852 into name should be safe during all of this, though. */
|
|
|
853 nm = XSTRING_DATA (name);
|
|
|
854
|
|
|
855 #ifdef WINDOWSNT
|
|
|
856 /* We will force directory separators to be either all \ or /, so make
|
|
|
857 a local copy to modify, even if there ends up being no change. */
|
|
|
858 nm = strcpy (alloca (strlen (nm) + 1), nm);
|
|
|
859
|
|
|
860 /* Find and remove drive specifier if present; this makes nm absolute
|
|
|
861 even if the rest of the name appears to be relative. */
|
|
|
862 {
|
|
|
863 Bufbyte *colon = strrchr (nm, ':');
|
|
|
864
|
|
|
865 if (colon)
|
|
|
866 /* Only recognize colon as part of drive specifier if there is a
|
|
|
867 single alphabetic character preceding the colon (and if the
|
|
|
868 character before the drive letter, if present, is a directory
|
|
|
869 separator); this is to support the remote system syntax used by
|
|
|
870 ange-ftp, and the "po:username" syntax for POP mailboxes. */
|
|
|
871 look_again:
|
|
|
872 if (nm == colon)
|
|
|
873 nm++;
|
|
|
874 else if (IS_DRIVE (colon[-1])
|
|
|
875 && (colon == nm + 1 || IS_DIRECTORY_SEP (colon[-2])))
|
|
|
876 {
|
|
|
877 drive = colon[-1];
|
|
|
878 nm = colon + 1;
|
|
|
879 }
|
|
|
880 else
|
|
|
881 {
|
|
|
882 while (--colon >= nm)
|
|
|
883 if (colon[0] == ':')
|
|
|
884 goto look_again;
|
|
|
885 }
|
|
|
886 }
|
|
|
887
|
|
|
888 /* If we see "c://somedir", we want to strip the first slash after the
|
|
|
889 colon when stripping the drive letter. Otherwise, this expands to
|
|
|
890 "//somedir". */
|
|
|
891 if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1]))
|
|
|
892 nm++;
|
|
|
893 #endif /* WINDOWSNT */
|
|
|
894
|
|
|
895 /* If nm is absolute, look for /./ or /../ sequences; if none are
|
|
|
896 found, we can probably return right away. We will avoid allocating
|
|
|
897 a new string if name is already fully expanded. */
|
|
|
898 if (
|
|
|
899 IS_DIRECTORY_SEP (nm[0])
|
|
|
900 #ifdef WINDOWSNT
|
|
|
901 && (drive || IS_DIRECTORY_SEP (nm[1]))
|
|
|
902 #endif
|
|
|
903 )
|
|
|
904 {
|
|
|
905 /* If it turns out that the filename we want to return is just a
|
|
|
906 suffix of FILENAME, we don't need to go through and edit
|
|
|
907 things; we just need to construct a new string using data
|
|
|
908 starting at the middle of FILENAME. If we set lose to a
|
|
|
909 non-zero value, that means we've discovered that we can't do
|
|
|
910 that cool trick. */
|
|
|
911 int lose = 0;
|
|
|
912
|
|
|
913 p = nm;
|
|
|
914 while (*p)
|
|
|
915 {
|
|
|
916 /* Since we know the name is absolute, we can assume that each
|
|
|
917 element starts with a "/". */
|
|
|
918
|
|
|
919 /* "." and ".." are hairy. */
|
|
|
920 if (IS_DIRECTORY_SEP (p[0])
|
|
|
921 && p[1] == '.'
|
|
|
922 && (IS_DIRECTORY_SEP (p[2])
|
|
|
923 || p[2] == 0
|
|
|
924 || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3])
|
|
|
925 || p[3] == 0))))
|
|
|
926 lose = 1;
|
|
|
927 p++;
|
|
|
928 }
|
|
|
929 if (!lose)
|
|
|
930 {
|
|
|
931 #ifdef WINDOWSNT
|
|
|
932 /* Make sure directories are all separated with / or \ as
|
|
|
933 desired, but avoid allocation of a new string when not
|
|
|
934 required. */
|
|
|
935 CORRECT_DIR_SEPS (nm);
|
|
|
936 if (IS_DIRECTORY_SEP (nm[1]))
|
|
|
937 {
|
|
|
938 if (strcmp (nm, XSTRING_DATA (name)) != 0)
|
|
|
939 name = build_string (nm);
|
|
|
940 }
|
|
|
941 /* drive must be set, so this is okay */
|
|
|
942 else if (strcmp (nm - 2, XSTRING_DATA (name)) != 0)
|
|
|
943 {
|
|
|
944 name = make_string (nm - 2, p - nm + 2);
|
|
|
945 XSTRING_DATA (name)[0] = DRIVE_LETTER (drive);
|
|
|
946 XSTRING_DATA (name)[1] = ':';
|
|
|
947 }
|
|
|
948 return name;
|
|
|
949 #else /* not WINDOWSNT */
|
|
|
950 if (nm == XSTRING_DATA (name))
|
|
|
951 return name;
|
|
|
952 return build_string ((char *) nm);
|
|
|
953 #endif /* not WINDOWSNT */
|
|
|
954 }
|
|
|
955 }
|
|
|
956
|
|
|
957 /* At this point, nm might or might not be an absolute file name. We
|
|
|
958 need to expand ~ or ~user if present, otherwise prefix nm with
|
|
|
959 default_directory if nm is not absolute, and finally collapse /./
|
|
|
960 and /foo/../ sequences.
|
|
|
961
|
|
|
962 We set newdir to be the appropriate prefix if one is needed:
|
|
|
963 - the relevant user directory if nm starts with ~ or ~user
|
|
|
964 - the specified drive's working dir (DOS/NT only) if nm does not
|
|
|
965 start with /
|
|
|
966 - the value of default_directory.
|
|
|
967
|
|
|
968 Note that these prefixes are not guaranteed to be absolute (except
|
|
|
969 for the working dir of a drive). Therefore, to ensure we always
|
|
|
970 return an absolute name, if the final prefix is not absolute we
|
|
|
971 append it to the current working directory. */
|
|
|
972
|
|
|
973 newdir = 0;
|
|
|
974
|
|
|
975 if (nm[0] == '~') /* prefix ~ */
|
|
|
976 {
|
|
|
977 if (IS_DIRECTORY_SEP (nm[1])
|
|
|
978 || nm[1] == 0) /* ~ by itself */
|
|
|
979 {
|
|
|
980 char * newdir_external = get_home_directory ();
|
|
|
981
|
|
|
982 if (newdir_external == NULL)
|
|
|
983 newdir = (Bufbyte *) "";
|
|
|
984 else
|
|
|
985 GET_C_CHARPTR_INT_FILENAME_DATA_ALLOCA (newdir_external, newdir);
|
|
|
986
|
|
|
987 nm++;
|
|
|
988 #ifdef WINDOWSNT
|
|
|
989 collapse_newdir = 0;
|
|
|
990 #endif
|
|
|
991 }
|
|
|
992 else /* ~user/filename */
|
|
|
993 {
|
|
|
994 for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++)
|
|
|
995 DO_NOTHING;
|
|
|
996 o = (Bufbyte *) alloca (p - nm + 1);
|
|
|
997 memcpy (o, (char *) nm, p - nm);
|
|
|
998 o [p - nm] = 0;
|
|
|
999
|
|
|
1000 /* #### marcpa's syncing note: FSF uses getpwnam even on NT,
|
|
|
1001 which does not work. The following works only if ~USER
|
|
|
1002 names the user who runs this instance of XEmacs. While
|
|
|
1003 NT is single-user (for the moment) you still can have
|
|
|
1004 multiple user profiles users defined, each with its HOME.
|
|
|
1005 Therefore, the following should be reworked to handle
|
|
|
1006 this case. */
|
|
|
1007 #ifdef WINDOWSNT
|
|
|
1008 /* Now if the file given is "~foo/file" and HOME="c:/", then
|
|
|
1009 we want the file to be named "c:/file" ("~foo" becomes
|
|
|
1010 "c:/"). The variable o has "~foo", so we can use the
|
|
|
1011 length of that string to offset nm. August Hill, 31 Aug
|
|
|
1012 1998. */
|
|
|
1013 newdir = (Bufbyte *) get_home_directory();
|
|
|
1014 dostounix_filename (newdir);
|
|
|
1015 nm += strlen(o) + 1;
|
|
|
1016 #else /* not WINDOWSNT */
|
|
|
1017 #ifdef __CYGWIN32__
|
|
|
1018 if ((user = user_login_name (NULL)) != NULL)
|
|
|
1019 {
|
|
|
1020 /* Does the user login name match the ~name? */
|
|
|
1021 if (strcmp (user, (char *) o + 1) == 0)
|
|
|
1022 {
|
|
|
1023 newdir = (Bufbyte *) get_home_directory();
|
|
|
1024 nm = p;
|
|
|
1025 }
|
|
|
1026 }
|
|
|
1027 if (! newdir)
|
|
|
1028 {
|
|
|
1029 #endif /* __CYGWIN32__ */
|
|
|
1030 /* Jamie reports that getpwnam() can get wedged by SIGIO/SIGALARM
|
|
|
1031 occurring in it. (It can call select()). */
|
|
|
1032 slow_down_interrupts ();
|
|
|
1033 pw = (struct passwd *) getpwnam ((char *) o + 1);
|
|
|
1034 speed_up_interrupts ();
|
|
|
1035 if (pw)
|
|
|
1036 {
|
|
|
1037 newdir = (Bufbyte *) pw -> pw_dir;
|
|
|
1038 nm = p;
|
|
|
1039 }
|
|
|
1040 #ifdef __CYGWIN32__
|
|
|
1041 }
|
|
|
1042 #endif
|
|
|
1043 #endif /* not WINDOWSNT */
|
|
|
1044
|
|
|
1045 /* If we don't find a user of that name, leave the name
|
|
|
1046 unchanged; don't move nm forward to p. */
|
|
|
1047 }
|
|
|
1048 }
|
|
|
1049
|
|
|
1050 #ifdef WINDOWSNT
|
|
|
1051 /* On DOS and Windows, nm is absolute if a drive name was specified;
|
|
|
1052 use the drive's current directory as the prefix if needed. */
|
|
|
1053 if (!newdir && drive)
|
|
|
1054 {
|
|
|
1055 /* Get default directory if needed to make nm absolute. */
|
|
|
1056 if (!IS_DIRECTORY_SEP (nm[0]))
|
|
|
1057 {
|
|
|
1058 newdir = alloca (MAXPATHLEN + 1);
|
|
|
1059 if (!getdefdir (toupper (drive) - 'A' + 1, newdir))
|
|
|
1060 newdir = NULL;
|
|
|
1061 }
|
|
|
1062 if (!newdir)
|
|
|
1063 {
|
|
|
1064 /* Either nm starts with /, or drive isn't mounted. */
|
|
|
1065 newdir = alloca (4);
|
|
|
1066 newdir[0] = DRIVE_LETTER (drive);
|
|
|
1067 newdir[1] = ':';
|
|
|
1068 newdir[2] = '/';
|
|
|
1069 newdir[3] = 0;
|
|
|
1070 }
|
|
|
1071 }
|
|
|
1072 #endif /* WINDOWSNT */
|
|
|
1073
|
|
|
1074 /* Finally, if no prefix has been specified and nm is not absolute,
|
|
|
1075 then it must be expanded relative to default_directory. */
|
|
|
1076
|
|
|
1077 if (1
|
|
|
1078 #ifndef WINDOWSNT
|
|
|
1079 /* /... alone is not absolute on DOS and Windows. */
|
|
|
1080 && !IS_DIRECTORY_SEP (nm[0])
|
|
|
1081 #else
|
|
|
1082 && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1]))
|
|
|
1083 #endif
|
|
|
1084 && !newdir)
|
|
|
1085 {
|
|
|
1086 newdir = XSTRING_DATA (default_directory);
|
|
|
1087 }
|
|
|
1088
|
|
|
1089 #ifdef WINDOWSNT
|
|
|
1090 if (newdir)
|
|
|
1091 {
|
|
|
1092 /* First ensure newdir is an absolute name. */
|
|
|
1093 if (
|
|
|
1094 /* Detect MSDOS file names with drive specifiers. */
|
|
|
1095 ! (IS_DRIVE (newdir[0])
|
|
|
1096 && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2]))
|
|
|
1097 /* Detect Windows file names in UNC format. */
|
|
|
1098 && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1]))
|
|
|
1099 /* Detect drive spec by itself */
|
|
|
1100 && ! (IS_DEVICE_SEP (newdir[1]) && newdir[2] == 0)
|
|
|
1101 )
|
|
|
1102 {
|
|
|
1103 /* Effectively, let newdir be (expand-file-name newdir cwd).
|
|
|
1104 Because of the admonition against calling expand-file-name
|
|
|
1105 when we have pointers into lisp strings, we accomplish this
|
|
|
1106 indirectly by prepending newdir to nm if necessary, and using
|
|
|
1107 cwd (or the wd of newdir's drive) as the new newdir. */
|
|
|
1108
|
|
|
1109 if (IS_DRIVE (newdir[0]) && newdir[1] == ':')
|
|
|
1110 {
|
|
|
1111 drive = newdir[0];
|
|
|
1112 newdir += 2;
|
|
|
1113 }
|
|
|
1114 if (!IS_DIRECTORY_SEP (nm[0]))
|
|
|
1115 {
|
|
|
1116 char * tmp = alloca (strlen (newdir) + strlen (nm) + 2);
|
|
|
1117 file_name_as_directory (tmp, newdir);
|
|
|
1118 strcat (tmp, nm);
|
|
|
1119 nm = tmp;
|
|
|
1120 }
|
|
|
1121 newdir = alloca (MAXPATHLEN + 1);
|
|
|
1122 if (drive)
|
|
|
1123 {
|
|
|
1124 if (!getdefdir (toupper (drive) - 'A' + 1, newdir))
|
|
|
1125 newdir = "/";
|
|
|
1126 }
|
|
|
1127 else
|
|
|
1128 getwd (newdir);
|
|
|
1129 }
|
|
|
1130
|
|
|
1131 /* Strip off drive name from prefix, if present. */
|
|
|
1132 if (IS_DRIVE (newdir[0]) && newdir[1] == ':')
|
|
|
1133 {
|
|
|
1134 drive = newdir[0];
|
|
|
1135 newdir += 2;
|
|
|
1136 }
|
|
|
1137
|
|
|
1138 /* Keep only a prefix from newdir if nm starts with slash
|
|
|
1139 (/ /server/share for UNC, nothing otherwise). */
|
|
|
1140 if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir)
|
|
|
1141 {
|
|
|
1142 if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1]))
|
|
|
1143 {
|
|
|
1144 newdir = strcpy (alloca (strlen (newdir) + 1), newdir);
|
|
|
1145 p = newdir + 2;
|
|
|
1146 while (*p && !IS_DIRECTORY_SEP (*p)) p++;
|
|
|
1147 p++;
|
|
|
1148 while (*p && !IS_DIRECTORY_SEP (*p)) p++;
|
|
|
1149 *p = 0;
|
|
|
1150 }
|
|
|
1151 else
|
|
|
1152 newdir = "";
|
|
|
1153 }
|
|
|
1154 }
|
|
|
1155 #endif /* WINDOWSNT */
|
|
|
1156
|
|
|
1157 if (newdir)
|
|
|
1158 {
|
|
|
1159 /* Get rid of any slash at the end of newdir, unless newdir is
|
|
|
1160 just // (an incomplete UNC name). */
|
|
|
1161 length = strlen ((char *) newdir);
|
|
|
1162 if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1])
|
|
|
1163 #ifdef WINDOWSNT
|
|
|
1164 && !(length == 2 && IS_DIRECTORY_SEP (newdir[0]))
|
|
|
1165 #endif
|
|
|
1166 )
|
|
|
1167 {
|
|
|
1168 Bufbyte *temp = (Bufbyte *) alloca (length);
|
|
|
1169 memcpy (temp, newdir, length - 1);
|
|
|
1170 temp[length - 1] = 0;
|
|
|
1171 newdir = temp;
|
|
|
1172 }
|
|
|
1173 tlen = length + 1;
|
|
|
1174 }
|
|
|
1175 else
|
|
|
1176 tlen = 0;
|
|
|
1177
|
|
|
1178 /* Now concatenate the directory and name to new space in the stack frame */
|
|
|
1179 tlen += strlen ((char *) nm) + 1;
|
|
|
1180 #ifdef WINDOWSNT
|
|
|
1181 /* Add reserved space for drive name. (The Microsoft x86 compiler
|
|
|
1182 produces incorrect code if the following two lines are combined.) */
|
|
|
1183 target = (Bufbyte *) alloca (tlen + 2);
|
|
|
1184 target += 2;
|
|
|
1185 #else /* not WINDOWSNT */
|
|
|
1186 target = (Bufbyte *) alloca (tlen);
|
|
|
1187 #endif /* not WINDOWSNT */
|
|
|
1188 *target = 0;
|
|
|
1189
|
|
|
1190 if (newdir)
|
|
|
1191 {
|
|
|
1192 if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0]))
|
|
|
1193 strcpy ((char *) target, (char *) newdir);
|
|
|
1194 else
|
|
|
1195 file_name_as_directory ((char *) target, (char *) newdir);
|
|
|
1196 }
|
|
|
1197
|
|
|
1198 strcat ((char *) target, (char *) nm);
|
|
|
1199
|
|
|
1200 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
|
|
|
1201
|
|
|
1202 /* Now canonicalize by removing /. and /foo/.. if they appear. */
|
|
|
1203
|
|
|
1204 p = target;
|
|
|
1205 o = target;
|
|
|
1206
|
|
|
1207 while (*p)
|
|
|
1208 {
|
|
|
1209 if (!IS_DIRECTORY_SEP (*p))
|
|
|
1210 {
|
|
|
1211 *o++ = *p++;
|
|
|
1212 }
|
|
|
1213 else if (IS_DIRECTORY_SEP (p[0])
|
|
|
1214 && p[1] == '.'
|
|
|
1215 && (IS_DIRECTORY_SEP (p[2])
|
|
|
1216 || p[2] == 0))
|
|
|
1217 {
|
|
|
1218 /* If "/." is the entire filename, keep the "/". Otherwise,
|
|
|
1219 just delete the whole "/.". */
|
|
|
1220 if (o == target && p[2] == '\0')
|
|
|
1221 *o++ = *p;
|
|
|
1222 p += 2;
|
|
|
1223 }
|
|
|
1224 else if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && p[2] == '.'
|
|
|
1225 /* `/../' is the "superroot" on certain file systems. */
|
|
|
1226 && o != target
|
|
|
1227 && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0))
|
|
|
1228 {
|
|
|
1229 while (o != target && (--o) && !IS_DIRECTORY_SEP (*o))
|
|
|
1230 ;
|
|
|
1231 /* Keep initial / only if this is the whole name. */
|
|
|
1232 if (o == target && IS_ANY_SEP (*o) && p[3] == 0)
|
|
|
1233 ++o;
|
|
|
1234 p += 3;
|
|
|
1235 }
|
|
|
1236 #ifdef WINDOWSNT
|
|
|
1237 /* if drive is set, we're not dealing with an UNC, so
|
|
|
1238 multiple dir-seps are redundant (and reportedly cause trouble
|
|
|
1239 under win95) */
|
|
|
1240 else if (drive && IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1]))
|
|
|
1241 ++p;
|
|
|
1242 #endif
|
|
|
1243 else
|
|
|
1244 {
|
|
|
1245 *o++ = *p++;
|
|
|
1246 }
|
|
|
1247 }
|
|
|
1248
|
|
|
1249 #ifdef WINDOWSNT
|
|
|
1250 /* At last, set drive name, except for network file name. */
|
|
|
1251 if (drive)
|
|
|
1252 {
|
|
|
1253 target -= 2;
|
|
|
1254 target[0] = DRIVE_LETTER (drive);
|
|
|
1255 target[1] = ':';
|
|
|
1256 }
|
|
|
1257 else
|
|
|
1258 {
|
|
|
1259 assert (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]));
|
|
|
1260 }
|
|
|
1261 CORRECT_DIR_SEPS (target);
|
|
|
1262 #endif /* WINDOWSNT */
|
|
|
1263
|
|
|
1264 return make_string (target, o - target);
|
|
|
1265 }
|
|
|
1266
|
|
|
1267 #if 0 /* FSFmacs */
|
|
|
1268 /* another older version of expand-file-name; */
|
|
|
1269 #endif
|
|
|
1270
|
|
|
1271 DEFUN ("file-truename", Ffile_truename, 1, 2, 0, /*
|
|
|
1272 Return the canonical name of the given FILE.
|
|
|
1273 Second arg DEFAULT is directory to start with if FILE is relative
|
|
|
1274 (does not start with slash); if DEFAULT is nil or missing,
|
|
|
1275 the current buffer's value of default-directory is used.
|
|
|
1276 No component of the resulting pathname will be a symbolic link, as
|
|
|
1277 in the realpath() function.
|
|
|
1278 */
|
|
|
1279 (filename, default_))
|
|
|
1280 {
|
|
|
1281 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1282 Lisp_Object expanded_name;
|
|
|
1283 Lisp_Object handler;
|
|
|
1284 struct gcpro gcpro1;
|
|
|
1285
|
|
|
1286 CHECK_STRING (filename);
|
|
|
1287
|
|
|
1288 expanded_name = Fexpand_file_name (filename, default_);
|
|
|
1289
|
|
|
1290 if (!STRINGP (expanded_name))
|
|
|
1291 return Qnil;
|
|
|
1292
|
|
|
1293 GCPRO1 (expanded_name);
|
|
|
1294 handler = Ffind_file_name_handler (expanded_name, Qfile_truename);
|
|
|
1295 UNGCPRO;
|
|
|
1296
|
|
|
1297 if (!NILP (handler))
|
|
|
1298 return call2_check_string (handler, Qfile_truename, expanded_name);
|
|
|
1299
|
|
|
1300 {
|
|
|
1301 char resolved_path[MAXPATHLEN];
|
|
|
1302 Extbyte *path;
|
|
|
1303 Extbyte *p;
|
|
|
1304 Extcount elen = XSTRING_LENGTH (expanded_name);
|
|
|
1305
|
|
|
1306 GET_STRING_FILENAME_DATA_ALLOCA (expanded_name,path,elen);
|
|
|
1307 p = path;
|
|
|
1308 if (elen > MAXPATHLEN)
|
|
|
1309 goto toolong;
|
|
|
1310
|
|
|
1311 /* Try doing it all at once. */
|
|
|
1312 /* !! Does realpath() Mule-encapsulate?
|
|
|
1313 Answer: Nope! So we do it above */
|
|
|
1314 if (!xrealpath ((char *) path, resolved_path))
|
|
|
1315 {
|
|
|
1316 /* Didn't resolve it -- have to do it one component at a time. */
|
|
|
1317 /* "realpath" is a typically useless, stupid un*x piece of crap.
|
|
|
1318 It claims to return a useful value in the "error" case, but since
|
|
|
1319 there is no indication provided of how far along the pathname
|
|
|
1320 the function went before erring, there is no way to use the
|
|
|
1321 partial result returned. What a piece of junk. */
|
|
|
1322 for (;;)
|
|
|
1323 {
|
|
|
1324 p = (Extbyte *) memchr (p + 1, '/', elen - (p + 1 - path));
|
|
|
1325 if (p)
|
|
|
1326 *p = 0;
|
|
|
1327
|
|
|
1328 /* memset (resolved_path, 0, sizeof (resolved_path)); */
|
|
|
1329 if (xrealpath ((char *) path, resolved_path))
|
|
|
1330 {
|
|
|
1331 if (p)
|
|
|
1332 *p = '/';
|
|
|
1333 else
|
|
|
1334 break;
|
|
|
1335
|
|
|
1336 }
|
|
|
1337 else if (errno == ENOENT || errno == EACCES)
|
|
|
1338 {
|
|
|
1339 /* Failed on this component. Just tack on the rest of
|
|
|
1340 the string and we are done. */
|
|
|
1341 int rlen = strlen (resolved_path);
|
|
|
1342
|
|
|
1343 /* "On failure, it returns NULL, sets errno to indicate
|
|
|
1344 the error, and places in resolved_path the absolute pathname
|
|
|
1345 of the path component which could not be resolved." */
|
|
|
1346 if (p)
|
|
|
1347 {
|
|
|
1348 int plen = elen - (p - path);
|
|
|
1349
|
|
|
1350 if (rlen > 1 && resolved_path[rlen - 1] == '/')
|
|
|
1351 rlen = rlen - 1;
|
|
|
1352
|
|
|
1353 if (plen + rlen + 1 > countof (resolved_path))
|
|
|
1354 goto toolong;
|
|
|
1355
|
|
|
1356 resolved_path[rlen] = '/';
|
|
|
1357 memcpy (resolved_path + rlen + 1, p + 1, plen + 1 - 1);
|
|
|
1358 }
|
|
|
1359 break;
|
|
|
1360 }
|
|
|
1361 else
|
|
|
1362 goto lose;
|
|
|
1363 }
|
|
|
1364 }
|
|
|
1365
|
|
|
1366 {
|
|
|
1367 int rlen = strlen (resolved_path);
|
|
|
1368 if (elen > 0 && XSTRING_BYTE (expanded_name, elen - 1) == '/'
|
|
|
1369 && !(rlen > 0 && resolved_path[rlen - 1] == '/'))
|
|
|
1370 {
|
|
|
1371 if (rlen + 1 > countof (resolved_path))
|
|
|
1372 goto toolong;
|
|
|
1373 resolved_path[rlen] = '/';
|
|
|
1374 resolved_path[rlen + 1] = 0;
|
|
|
1375 rlen = rlen + 1;
|
|
|
1376 }
|
|
|
1377 return make_ext_string ((Bufbyte *) resolved_path, rlen, FORMAT_BINARY);
|
|
|
1378 }
|
|
|
1379
|
|
|
1380 toolong:
|
|
|
1381 errno = ENAMETOOLONG;
|
|
|
1382 goto lose;
|
|
|
1383 lose:
|
|
|
1384 report_file_error ("Finding truename", list1 (expanded_name));
|
|
|
1385 }
|
|
|
1386 return Qnil; /* suppress compiler warning */
|
|
|
1387 }
|
|
|
1388
|
|
|
1389
|
|
|
1390 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, 1, 1, 0, /*
|
|
|
1391 Substitute environment variables referred to in FILENAME.
|
|
|
1392 `$FOO' where FOO is an environment variable name means to substitute
|
|
|
1393 the value of that variable. The variable name should be terminated
|
|
|
1394 with a character not a letter, digit or underscore; otherwise, enclose
|
|
|
1395 the entire variable name in braces.
|
|
|
1396 If `/~' appears, all of FILENAME through that `/' is discarded.
|
|
|
1397
|
|
|
1398 */
|
|
|
1399 (string))
|
|
|
1400 {
|
|
|
1401 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1402 Bufbyte *nm;
|
|
|
1403
|
|
|
1404 Bufbyte *s, *p, *o, *x, *endp;
|
|
|
1405 Bufbyte *target = 0;
|
|
|
1406 int total = 0;
|
|
|
1407 int substituted = 0;
|
|
|
1408 Bufbyte *xnm;
|
|
|
1409 Lisp_Object handler;
|
|
|
1410
|
|
|
1411 CHECK_STRING (string);
|
|
|
1412
|
|
|
1413 /* If the file name has special constructs in it,
|
|
|
1414 call the corresponding file handler. */
|
|
|
1415 handler = Ffind_file_name_handler (string, Qsubstitute_in_file_name);
|
|
|
1416 if (!NILP (handler))
|
|
|
1417 return call2_check_string_or_nil (handler, Qsubstitute_in_file_name,
|
|
|
1418 string);
|
|
|
1419
|
|
|
1420 nm = XSTRING_DATA (string);
|
|
|
1421 endp = nm + XSTRING_LENGTH (string);
|
|
|
1422
|
|
|
1423 /* If /~ or // appears, discard everything through first slash. */
|
|
|
1424
|
|
|
1425 for (p = nm; p != endp; p++)
|
|
|
1426 {
|
|
|
1427 if ((p[0] == '~'
|
|
|
1428 #if defined (APOLLO) || defined (WINDOWSNT) || defined (__CYGWIN32__)
|
|
|
1429 /* // at start of file name is meaningful in Apollo and
|
|
|
1430 WindowsNT systems */
|
|
|
1431 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != nm)
|
|
|
1432 #else /* not (APOLLO || WINDOWSNT || __CYGWIN32__) */
|
|
|
1433 || IS_DIRECTORY_SEP (p[0])
|
|
|
1434 #endif /* not (APOLLO || WINDOWSNT || __CYGWIN32__) */
|
|
|
1435 )
|
|
|
1436 && p != nm
|
|
|
1437 && (IS_DIRECTORY_SEP (p[-1])))
|
|
|
1438 {
|
|
|
1439 nm = p;
|
|
|
1440 substituted = 1;
|
|
|
1441 }
|
|
|
1442 #ifdef WINDOWSNT
|
|
|
1443 /* see comment in expand-file-name about drive specifiers */
|
|
|
1444 else if (IS_DRIVE (p[0]) && p[1] == ':'
|
|
|
1445 && p > nm && IS_DIRECTORY_SEP (p[-1]))
|
|
|
1446 {
|
|
|
1447 nm = p;
|
|
|
1448 substituted = 1;
|
|
|
1449 }
|
|
|
1450 #endif /* WINDOWSNT */
|
|
|
1451 }
|
|
|
1452
|
|
|
1453 /* See if any variables are substituted into the string
|
|
|
1454 and find the total length of their values in `total' */
|
|
|
1455
|
|
|
1456 for (p = nm; p != endp;)
|
|
|
1457 if (*p != '$')
|
|
|
1458 p++;
|
|
|
1459 else
|
|
|
1460 {
|
|
|
1461 p++;
|
|
|
1462 if (p == endp)
|
|
|
1463 goto badsubst;
|
|
|
1464 else if (*p == '$')
|
|
|
1465 {
|
|
|
1466 /* "$$" means a single "$" */
|
|
|
1467 p++;
|
|
|
1468 total -= 1;
|
|
|
1469 substituted = 1;
|
|
|
1470 continue;
|
|
|
1471 }
|
|
|
1472 else if (*p == '{')
|
|
|
1473 {
|
|
|
1474 o = ++p;
|
|
|
1475 while (p != endp && *p != '}') p++;
|
|
|
1476 if (*p != '}') goto missingclose;
|
|
|
1477 s = p;
|
|
|
1478 }
|
|
|
1479 else
|
|
|
1480 {
|
|
|
1481 o = p;
|
|
|
1482 while (p != endp && (isalnum (*p) || *p == '_')) p++;
|
|
|
1483 s = p;
|
|
|
1484 }
|
|
|
1485
|
|
|
1486 /* Copy out the variable name */
|
|
|
1487 target = (Bufbyte *) alloca (s - o + 1);
|
|
|
1488 strncpy ((char *) target, (char *) o, s - o);
|
|
|
1489 target[s - o] = 0;
|
|
|
1490 #ifdef WINDOWSNT
|
|
|
1491 strupr (target); /* $home == $HOME etc. */
|
|
|
1492 #endif /* WINDOWSNT */
|
|
|
1493
|
|
|
1494 /* Get variable value */
|
|
|
1495 o = (Bufbyte *) egetenv ((char *) target);
|
|
|
1496 if (!o) goto badvar;
|
|
|
1497 total += strlen ((char *) o);
|
|
|
1498 substituted = 1;
|
|
|
1499 }
|
|
|
1500
|
|
|
1501 if (!substituted)
|
|
|
1502 return string;
|
|
|
1503
|
|
|
1504 /* If substitution required, recopy the string and do it */
|
|
|
1505 /* Make space in stack frame for the new copy */
|
|
|
1506 xnm = (Bufbyte *) alloca (XSTRING_LENGTH (string) + total + 1);
|
|
|
1507 x = xnm;
|
|
|
1508
|
|
|
1509 /* Copy the rest of the name through, replacing $ constructs with values */
|
|
|
1510 for (p = nm; *p;)
|
|
|
1511 if (*p != '$')
|
|
|
1512 *x++ = *p++;
|
|
|
1513 else
|
|
|
1514 {
|
|
|
1515 p++;
|
|
|
1516 if (p == endp)
|
|
|
1517 goto badsubst;
|
|
|
1518 else if (*p == '$')
|
|
|
1519 {
|
|
|
1520 *x++ = *p++;
|
|
|
1521 continue;
|
|
|
1522 }
|
|
|
1523 else if (*p == '{')
|
|
|
1524 {
|
|
|
1525 o = ++p;
|
|
|
1526 while (p != endp && *p != '}') p++;
|
|
|
1527 if (*p != '}') goto missingclose;
|
|
|
1528 s = p++;
|
|
|
1529 }
|
|
|
1530 else
|
|
|
1531 {
|
|
|
1532 o = p;
|
|
|
1533 while (p != endp && (isalnum (*p) || *p == '_')) p++;
|
|
|
1534 s = p;
|
|
|
1535 }
|
|
|
1536
|
|
|
1537 /* Copy out the variable name */
|
|
|
1538 target = (Bufbyte *) alloca (s - o + 1);
|
|
|
1539 strncpy ((char *) target, (char *) o, s - o);
|
|
|
1540 target[s - o] = 0;
|
|
|
1541 #ifdef WINDOWSNT
|
|
|
1542 strupr (target); /* $home == $HOME etc. */
|
|
|
1543 #endif /* WINDOWSNT */
|
|
|
1544
|
|
|
1545 /* Get variable value */
|
|
|
1546 o = (Bufbyte *) egetenv ((char *) target);
|
|
|
1547 if (!o)
|
|
|
1548 goto badvar;
|
|
|
1549
|
|
|
1550 strcpy ((char *) x, (char *) o);
|
|
|
1551 x += strlen ((char *) o);
|
|
|
1552 }
|
|
|
1553
|
|
|
1554 *x = 0;
|
|
|
1555
|
|
|
1556 /* If /~ or // appears, discard everything through first slash. */
|
|
|
1557
|
|
|
1558 for (p = xnm; p != x; p++)
|
|
|
1559 if ((p[0] == '~'
|
|
|
1560 #if defined (APOLLO) || defined (WINDOWSNT)
|
|
|
1561 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != xnm)
|
|
|
1562 #else /* not (APOLLO || WINDOWSNT) */
|
|
|
1563 || IS_DIRECTORY_SEP (p[0])
|
|
|
1564 #endif /* APOLLO || WINDOWSNT */
|
|
|
1565 )
|
|
|
1566 /* don't do p[-1] if that would go off the beginning --jwz */
|
|
|
1567 && p != nm && p > xnm && IS_DIRECTORY_SEP (p[-1]))
|
|
|
1568 xnm = p;
|
|
|
1569 #ifdef WINDOWSNT
|
|
|
1570 else if (IS_DRIVE (p[0]) && p[1] == ':'
|
|
|
1571 && p > nm && IS_DIRECTORY_SEP (p[-1]))
|
|
|
1572 xnm = p;
|
|
|
1573 #endif
|
|
|
1574
|
|
|
1575 return make_string (xnm, x - xnm);
|
|
|
1576
|
|
|
1577 badsubst:
|
|
|
1578 error ("Bad format environment-variable substitution");
|
|
|
1579 missingclose:
|
|
|
1580 error ("Missing \"}\" in environment-variable substitution");
|
|
|
1581 badvar:
|
|
|
1582 error ("Substituting nonexistent environment variable \"%s\"",
|
|
|
1583 target);
|
|
|
1584
|
|
|
1585 /* NOTREACHED */
|
|
|
1586 return Qnil; /* suppress compiler warning */
|
|
|
1587 }
|
|
|
1588
|
|
|
1589 /* A slightly faster and more convenient way to get
|
|
|
1590 (directory-file-name (expand-file-name FOO)). */
|
|
|
1591
|
|
|
1592 Lisp_Object
|
|
|
1593 expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir)
|
|
|
1594 {
|
|
|
1595 /* This function can call lisp */
|
|
|
1596 Lisp_Object abspath;
|
|
|
1597 struct gcpro gcpro1;
|
|
|
1598
|
|
|
1599 abspath = Fexpand_file_name (filename, defdir);
|
|
|
1600 GCPRO1 (abspath);
|
|
|
1601 /* Remove final slash, if any (unless path is root).
|
|
|
1602 stat behaves differently depending! */
|
|
|
1603 if (XSTRING_LENGTH (abspath) > 1
|
|
|
1604 && IS_DIRECTORY_SEP (XSTRING_BYTE (abspath, XSTRING_LENGTH (abspath) - 1))
|
|
|
1605 && !IS_DEVICE_SEP (XSTRING_BYTE (abspath, XSTRING_LENGTH (abspath) - 2)))
|
|
|
1606 /* We cannot take shortcuts; they might be wrong for magic file names. */
|
|
|
1607 abspath = Fdirectory_file_name (abspath);
|
|
|
1608 UNGCPRO;
|
|
|
1609 return abspath;
|
|
|
1610 }
|
|
|
1611
|
|
|
1612 /* Signal an error if the file ABSNAME already exists.
|
|
|
1613 If INTERACTIVE is nonzero, ask the user whether to proceed,
|
|
|
1614 and bypass the error if the user says to go ahead.
|
|
|
1615 QUERYSTRING is a name for the action that is being considered
|
|
|
1616 to alter the file.
|
|
|
1617 *STATPTR is used to store the stat information if the file exists.
|
|
|
1618 If the file does not exist, STATPTR->st_mode is set to 0. */
|
|
|
1619
|
|
|
1620 static void
|
|
|
1621 barf_or_query_if_file_exists (Lisp_Object absname, CONST char *querystring,
|
|
|
1622 int interactive, struct stat *statptr)
|
|
|
1623 {
|
|
|
1624 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1625 struct stat statbuf;
|
|
|
1626
|
|
|
1627 /* stat is a good way to tell whether the file exists,
|
|
|
1628 regardless of what access permissions it has. */
|
|
|
1629 if (stat ((char *) XSTRING_DATA (absname), &statbuf) >= 0)
|
|
|
1630 {
|
|
|
1631 Lisp_Object tem;
|
|
|
1632
|
|
|
1633 if (interactive)
|
|
|
1634 {
|
|
|
1635 Lisp_Object prompt;
|
|
|
1636 struct gcpro gcpro1;
|
|
|
1637
|
|
|
1638 prompt = emacs_doprnt_string_c
|
|
|
1639 ((CONST Bufbyte *) GETTEXT ("File %s already exists; %s anyway? "),
|
|
|
1640 Qnil, -1, XSTRING_DATA (absname),
|
|
|
1641 GETTEXT (querystring));
|
|
|
1642
|
|
|
1643 GCPRO1 (prompt);
|
|
|
1644 tem = call1 (Qyes_or_no_p, prompt);
|
|
|
1645 UNGCPRO;
|
|
|
1646 }
|
|
|
1647 else
|
|
|
1648 tem = Qnil;
|
|
|
1649
|
|
|
1650 if (NILP (tem))
|
|
|
1651 Fsignal (Qfile_already_exists,
|
|
|
1652 list2 (build_translated_string ("File already exists"),
|
|
|
1653 absname));
|
|
|
1654 if (statptr)
|
|
|
1655 *statptr = statbuf;
|
|
|
1656 }
|
|
|
1657 else
|
|
|
1658 {
|
|
|
1659 if (statptr)
|
|
|
1660 statptr->st_mode = 0;
|
|
|
1661 }
|
|
|
1662 return;
|
|
|
1663 }
|
|
|
1664
|
|
|
1665 DEFUN ("copy-file", Fcopy_file, 2, 4,
|
|
|
1666 "fCopy file: \nFCopy %s to file: \np\nP", /*
|
|
|
1667 Copy FILE to NEWNAME. Both args must be strings.
|
|
|
1668 Signals a `file-already-exists' error if file NEWNAME already exists,
|
|
|
1669 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.
|
|
|
1670 A number as third arg means request confirmation if NEWNAME already exists.
|
|
|
1671 This is what happens in interactive use with M-x.
|
|
|
1672 Fourth arg KEEP-TIME non-nil means give the new file the same
|
|
|
1673 last-modified time as the old one. (This works on only some systems.)
|
|
|
1674 A prefix arg makes KEEP-TIME non-nil.
|
|
|
1675 */
|
|
|
1676 (filename, newname, ok_if_already_exists, keep_time))
|
|
|
1677 {
|
|
|
1678 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1679 int ifd, ofd, n;
|
|
|
1680 char buf[16 * 1024];
|
|
|
1681 struct stat st, out_st;
|
|
|
1682 Lisp_Object handler;
|
|
|
1683 int speccount = specpdl_depth ();
|
|
|
1684 struct gcpro gcpro1, gcpro2;
|
|
|
1685 /* Lisp_Object args[6]; */
|
|
|
1686 int input_file_statable_p;
|
|
|
1687
|
|
|
1688 GCPRO2 (filename, newname);
|
|
|
1689 CHECK_STRING (filename);
|
|
|
1690 CHECK_STRING (newname);
|
|
|
1691 filename = Fexpand_file_name (filename, Qnil);
|
|
|
1692 newname = Fexpand_file_name (newname, Qnil);
|
|
|
1693
|
|
|
1694 /* If the input file name has special constructs in it,
|
|
|
1695 call the corresponding file handler. */
|
|
|
1696 handler = Ffind_file_name_handler (filename, Qcopy_file);
|
|
|
1697 /* Likewise for output file name. */
|
|
|
1698 if (NILP (handler))
|
|
|
1699 handler = Ffind_file_name_handler (newname, Qcopy_file);
|
|
|
1700 if (!NILP (handler))
|
|
|
1701 {
|
|
|
1702 UNGCPRO;
|
|
|
1703 return call5 (handler, Qcopy_file, filename, newname,
|
|
|
1704 ok_if_already_exists, keep_time);
|
|
|
1705 }
|
|
|
1706
|
|
|
1707 /* When second argument is a directory, copy the file into it.
|
|
|
1708 (copy-file "foo" "bar/") == (copy-file "foo" "bar/foo")
|
|
|
1709 */
|
|
|
1710 if (!NILP (Ffile_directory_p (newname)))
|
|
|
1711 {
|
|
|
1712 Lisp_Object args[3];
|
|
|
1713 struct gcpro ngcpro1;
|
|
|
1714 int i = 1;
|
|
|
1715
|
|
|
1716 args[0] = newname;
|
|
|
1717 args[1] = Qnil; args[2] = Qnil;
|
|
|
1718 NGCPRO1 (*args);
|
|
|
1719 ngcpro1.nvars = 3;
|
|
|
1720 if (XSTRING_BYTE (newname, XSTRING_LENGTH (newname) - 1) != '/')
|
|
|
1721 args[i++] = build_string ("/");
|
|
|
1722 args[i++] = Ffile_name_nondirectory (filename);
|
|
|
1723 newname = Fconcat (i, args);
|
|
|
1724 NUNGCPRO;
|
|
|
1725 }
|
|
|
1726
|
|
|
1727 if (NILP (ok_if_already_exists)
|
|
|
1728 || INTP (ok_if_already_exists))
|
|
|
1729 barf_or_query_if_file_exists (newname, "copy to it",
|
|
|
1730 INTP (ok_if_already_exists), &out_st);
|
|
|
1731 else if (stat ((CONST char *) XSTRING_DATA (newname), &out_st) < 0)
|
|
|
1732 out_st.st_mode = 0;
|
|
|
1733
|
|
|
1734 ifd = interruptible_open ((char *) XSTRING_DATA (filename), O_RDONLY | OPEN_BINARY, 0);
|
|
|
1735 if (ifd < 0)
|
|
|
1736 report_file_error ("Opening input file", list1 (filename));
|
|
|
1737
|
|
|
1738 record_unwind_protect (close_file_unwind, make_int (ifd));
|
|
|
1739
|
|
|
1740 /* We can only copy regular files and symbolic links. Other files are not
|
|
|
1741 copyable by us. */
|
|
|
1742 input_file_statable_p = (fstat (ifd, &st) >= 0);
|
|
|
1743
|
|
|
1744 #ifndef WINDOWSNT
|
|
|
1745 if (out_st.st_mode != 0
|
|
|
1746 && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino)
|
|
|
1747 {
|
|
|
1748 errno = 0;
|
|
|
1749 report_file_error ("Input and output files are the same",
|
|
|
1750 list2 (filename, newname));
|
|
|
1751 }
|
|
|
1752 #endif
|
|
|
1753
|
|
|
1754 #if defined (S_ISREG) && defined (S_ISLNK)
|
|
|
1755 if (input_file_statable_p)
|
|
|
1756 {
|
|
|
1757 if (!(S_ISREG (st.st_mode))
|
|
|
1758 /* XEmacs: have to allow S_ISCHR in order to copy /dev/null */
|
|
|
1759 #ifdef S_ISCHR
|
|
|
1760 && !(S_ISCHR (st.st_mode))
|
|
|
1761 #endif
|
|
|
1762 && !(S_ISLNK (st.st_mode)))
|
|
|
1763 {
|
|
|
1764 #if defined (EISDIR)
|
|
|
1765 /* Get a better looking error message. */
|
|
|
1766 errno = EISDIR;
|
|
|
1767 #endif /* EISDIR */
|
|
|
1768 report_file_error ("Non-regular file", list1 (filename));
|
|
|
1769 }
|
|
|
1770 }
|
|
|
1771 #endif /* S_ISREG && S_ISLNK */
|
|
|
1772
|
|
|
1773 ofd = open( (char *) XSTRING_DATA (newname),
|
|
|
1774 O_WRONLY | O_CREAT | O_TRUNC | OPEN_BINARY, CREAT_MODE);
|
|
|
1775 if (ofd < 0)
|
|
|
1776 report_file_error ("Opening output file", list1 (newname));
|
|
|
1777
|
|
|
1778 {
|
|
|
1779 Lisp_Object ofd_locative = noseeum_cons (make_int (ofd), Qnil);
|
|
|
1780
|
|
|
1781 record_unwind_protect (close_file_unwind, ofd_locative);
|
|
|
1782
|
|
|
1783 while ((n = read_allowing_quit (ifd, buf, sizeof (buf))) > 0)
|
|
|
1784 {
|
|
|
1785 if (write_allowing_quit (ofd, buf, n) != n)
|
|
|
1786 report_file_error ("I/O error", list1 (newname));
|
|
|
1787 }
|
|
|
1788
|
|
|
1789 /* Closing the output clobbers the file times on some systems. */
|
|
|
1790 if (close (ofd) < 0)
|
|
|
1791 report_file_error ("I/O error", list1 (newname));
|
|
|
1792
|
|
|
1793 if (input_file_statable_p)
|
|
|
1794 {
|
|
|
1795 if (!NILP (keep_time))
|
|
|
1796 {
|
|
|
1797 EMACS_TIME atime, mtime;
|
|
|
1798 EMACS_SET_SECS_USECS (atime, st.st_atime, 0);
|
|
|
1799 EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0);
|
|
|
1800 if (set_file_times ((char *) XSTRING_DATA (newname), atime,
|
|
|
1801 mtime))
|
|
|
1802 report_file_error ("I/O error", list1 (newname));
|
|
|
1803 }
|
|
|
1804 chmod ((CONST char *) XSTRING_DATA (newname),
|
|
|
1805 st.st_mode & 07777);
|
|
|
1806 }
|
|
|
1807
|
|
|
1808 /* We'll close it by hand */
|
|
|
1809 XCAR (ofd_locative) = Qnil;
|
|
|
1810
|
|
|
1811 /* Close ifd */
|
|
|
1812 unbind_to (speccount, Qnil);
|
|
|
1813 }
|
|
|
1814
|
|
|
1815 UNGCPRO;
|
|
|
1816 return Qnil;
|
|
|
1817 }
|
|
|
1818
|
|
|
1819 DEFUN ("make-directory-internal", Fmake_directory_internal, 1, 1, 0, /*
|
|
|
1820 Create a directory. One argument, a file name string.
|
|
|
1821 */
|
|
|
1822 (dirname_))
|
|
|
1823 {
|
|
|
1824 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1825 char dir [MAXPATHLEN];
|
|
|
1826 Lisp_Object handler;
|
|
|
1827 struct gcpro gcpro1;
|
|
|
1828
|
|
|
1829 CHECK_STRING (dirname_);
|
|
|
1830 dirname_ = Fexpand_file_name (dirname_, Qnil);
|
|
|
1831
|
|
|
1832 GCPRO1 (dirname_);
|
|
|
1833 handler = Ffind_file_name_handler (dirname_, Qmake_directory_internal);
|
|
|
1834 UNGCPRO;
|
|
|
1835 if (!NILP (handler))
|
|
|
1836 return (call2 (handler, Qmake_directory_internal, dirname_));
|
|
|
1837
|
|
|
1838 if (XSTRING_LENGTH (dirname_) > (Bytecount) (sizeof (dir) - 1))
|
|
|
1839 {
|
|
|
1840 return Fsignal (Qfile_error,
|
|
|
1841 list3 (build_translated_string ("Creating directory"),
|
|
|
1842 build_translated_string ("pathame too long"),
|
|
|
1843 dirname_));
|
|
|
1844 }
|
|
|
1845 strncpy (dir, (char *) XSTRING_DATA (dirname_),
|
|
|
1846 XSTRING_LENGTH (dirname_) + 1);
|
|
|
1847
|
|
|
1848 if (dir [XSTRING_LENGTH (dirname_) - 1] == '/')
|
|
|
1849 dir [XSTRING_LENGTH (dirname_) - 1] = 0;
|
|
|
1850
|
|
|
1851 if (mkdir (dir, 0777) != 0)
|
|
|
1852 report_file_error ("Creating directory", list1 (dirname_));
|
|
|
1853
|
|
|
1854 return Qnil;
|
|
|
1855 }
|
|
|
1856
|
|
|
1857 DEFUN ("delete-directory", Fdelete_directory, 1, 1, "FDelete directory: ", /*
|
|
|
1858 Delete a directory. One argument, a file name or directory name string.
|
|
|
1859 */
|
|
|
1860 (dirname_))
|
|
|
1861 {
|
|
|
1862 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1863 Lisp_Object handler;
|
|
|
1864 struct gcpro gcpro1;
|
|
|
1865
|
|
|
1866 CHECK_STRING (dirname_);
|
|
|
1867
|
|
|
1868 GCPRO1 (dirname_);
|
|
|
1869 dirname_ = Fexpand_file_name (dirname_, Qnil);
|
|
|
1870 dirname_ = Fdirectory_file_name (dirname_);
|
|
|
1871
|
|
|
1872 handler = Ffind_file_name_handler (dirname_, Qdelete_directory);
|
|
|
1873 UNGCPRO;
|
|
|
1874 if (!NILP (handler))
|
|
|
1875 return (call2 (handler, Qdelete_directory, dirname_));
|
|
|
1876
|
|
|
1877 if (rmdir ((char *) XSTRING_DATA (dirname_)) != 0)
|
|
|
1878 report_file_error ("Removing directory", list1 (dirname_));
|
|
|
1879
|
|
|
1880 return Qnil;
|
|
|
1881 }
|
|
|
1882
|
|
|
1883 DEFUN ("delete-file", Fdelete_file, 1, 1, "fDelete file: ", /*
|
|
|
1884 Delete specified file. One argument, a file name string.
|
|
|
1885 If file has multiple names, it continues to exist with the other names.
|
|
|
1886 */
|
|
|
1887 (filename))
|
|
|
1888 {
|
|
|
1889 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1890 Lisp_Object handler;
|
|
|
1891 struct gcpro gcpro1;
|
|
|
1892
|
|
|
1893 CHECK_STRING (filename);
|
|
|
1894 filename = Fexpand_file_name (filename, Qnil);
|
|
|
1895
|
|
|
1896 GCPRO1 (filename);
|
|
|
1897 handler = Ffind_file_name_handler (filename, Qdelete_file);
|
|
|
1898 UNGCPRO;
|
|
|
1899 if (!NILP (handler))
|
|
|
1900 return call2 (handler, Qdelete_file, filename);
|
|
|
1901
|
|
|
1902 if (0 > unlink ((char *) XSTRING_DATA (filename)))
|
|
|
1903 report_file_error ("Removing old name", list1 (filename));
|
|
|
1904 return Qnil;
|
|
|
1905 }
|
|
|
1906
|
|
|
1907 static Lisp_Object
|
|
|
1908 internal_delete_file_1 (Lisp_Object ignore, Lisp_Object ignore2)
|
|
|
1909 {
|
|
|
1910 return Qt;
|
|
|
1911 }
|
|
|
1912
|
|
|
1913 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
|
|
|
1914
|
|
|
1915 int
|
|
|
1916 internal_delete_file (Lisp_Object filename)
|
|
|
1917 {
|
|
|
1918 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1919 return NILP (condition_case_1 (Qt, Fdelete_file, filename,
|
|
|
1920 internal_delete_file_1, Qnil));
|
|
|
1921 }
|
|
|
1922
|
|
|
1923 DEFUN ("rename-file", Frename_file, 2, 3,
|
|
|
1924 "fRename file: \nFRename %s to file: \np", /*
|
|
|
1925 Rename FILE as NEWNAME. Both args strings.
|
|
|
1926 If file has names other than FILE, it continues to have those names.
|
|
|
1927 Signals a `file-already-exists' error if a file NEWNAME already exists
|
|
|
1928 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
|
|
|
1929 A number as third arg means request confirmation if NEWNAME already exists.
|
|
|
1930 This is what happens in interactive use with M-x.
|
|
|
1931 */
|
|
|
1932 (filename, newname, ok_if_already_exists))
|
|
|
1933 {
|
|
|
1934 /* This function can GC. GC checked 1997.04.06. */
|
|
|
1935 Lisp_Object handler;
|
|
|
1936 struct gcpro gcpro1, gcpro2;
|
|
|
1937
|
|
|
1938 GCPRO2 (filename, newname);
|
|
|
1939 CHECK_STRING (filename);
|
|
|
1940 CHECK_STRING (newname);
|
|
|
1941 filename = Fexpand_file_name (filename, Qnil);
|
|
|
1942 newname = Fexpand_file_name (newname, Qnil);
|
|
|
1943
|
|
|
1944 /* If the file name has special constructs in it,
|
|
|
1945 call the corresponding file handler. */
|
|
|
1946 handler = Ffind_file_name_handler (filename, Qrename_file);
|
|
|
1947 if (NILP (handler))
|
|
|
1948 handler = Ffind_file_name_handler (newname, Qrename_file);
|
|
|
1949 if (!NILP (handler))
|
|
|
1950 {
|
|
|
1951 UNGCPRO;
|
|
|
1952 return call4 (handler, Qrename_file,
|
|
|
1953 filename, newname, ok_if_already_exists);
|
|
|
1954 }
|
|
|
1955
|
|
|
1956 /* When second argument is a directory, rename the file into it.
|
|
|
1957 (rename-file "foo" "bar/") == (rename-file "foo" "bar/foo")
|
|
|
1958 */
|
|
|
1959 if (!NILP (Ffile_directory_p (newname)))
|
|
|
1960 {
|
|
|
1961 Lisp_Object args[3];
|
|
|
1962 struct gcpro ngcpro1;
|
|
|
1963 int i = 1;
|
|
|
1964
|
|
|
1965 args[0] = newname;
|
|
|
1966 args[1] = Qnil; args[2] = Qnil;
|
|
|
1967 NGCPRO1 (*args);
|
|
|
1968 ngcpro1.nvars = 3;
|
|
|
1969 if (XSTRING_BYTE (newname, XSTRING_LENGTH (newname) - 1) != '/')
|
|
|
1970 args[i++] = build_string ("/");
|
|
|
1971 args[i++] = Ffile_name_nondirectory (filename);
|
|
|
1972 newname = Fconcat (i, args);
|
|
|
1973 NUNGCPRO;
|
|
|
1974 }
|
|
|
1975
|
|
|
1976 if (NILP (ok_if_already_exists)
|
|
|
1977 || INTP (ok_if_already_exists))
|
|
|
1978 barf_or_query_if_file_exists (newname, "rename to it",
|
|
|
1979 INTP (ok_if_already_exists), 0);
|
|
|
1980
|
|
|
1981 /* Syncing with FSF 19.34.6 note: FSF does not have conditional code for
|
|
|
1982 WINDOWSNT here; I've removed it. --marcpa */
|
|
|
1983
|
|
|
1984 /* FSFmacs only calls rename() here under BSD 4.1, and calls
|
|
|
1985 link() and unlink() otherwise, but that's bogus. Sometimes
|
|
|
1986 rename() succeeds where link()/unlink() fail, and we have
|
|
|
1987 configure check for rename() and emulate using link()/unlink()
|
|
|
1988 if necessary. */
|
|
|
1989 if (0 > rename ((char *) XSTRING_DATA (filename),
|
|
|
1990 (char *) XSTRING_DATA (newname)))
|
|
|
1991 {
|
|
|
1992 if (errno == EXDEV)
|
|
|
1993 {
|
|
|
1994 Fcopy_file (filename, newname,
|
|
|
1995 /* We have already prompted if it was an integer,
|
|
|
1996 so don't have copy-file prompt again. */
|
|
|
1997 (NILP (ok_if_already_exists) ? Qnil : Qt),
|
|
|
1998 Qt);
|
|
|
1999 Fdelete_file (filename);
|
|
|
2000 }
|
|
|
2001 else
|
|
|
2002 {
|
|
|
2003 report_file_error ("Renaming", list2 (filename, newname));
|
|
|
2004 }
|
|
|
2005 }
|
|
|
2006 UNGCPRO;
|
|
|
2007 return Qnil;
|
|
|
2008 }
|
|
|
2009
|
|
|
2010 DEFUN ("add-name-to-file", Fadd_name_to_file, 2, 3,
|
|
|
2011 "fAdd name to file: \nFName to add to %s: \np", /*
|
|
|
2012 Give FILE additional name NEWNAME. Both args strings.
|
|
|
2013 Signals a `file-already-exists' error if a file NEWNAME already exists
|
|
|
2014 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
|
|
|
2015 A number as third arg means request confirmation if NEWNAME already exists.
|
|
|
2016 This is what happens in interactive use with M-x.
|
|
|
2017 */
|
|
|
2018 (filename, newname, ok_if_already_exists))
|
|
|
2019 {
|
|
|
2020 /* This function can GC. GC checked 1997.04.06. */
|
|
|
2021 Lisp_Object handler;
|
|
|
2022 struct gcpro gcpro1, gcpro2;
|
|
|
2023
|
|
|
2024 GCPRO2 (filename, newname);
|
|
|
2025 CHECK_STRING (filename);
|
|
|
2026 CHECK_STRING (newname);
|
|
|
2027 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2028 newname = Fexpand_file_name (newname, Qnil);
|
|
|
2029
|
|
|
2030 /* If the file name has special constructs in it,
|
|
|
2031 call the corresponding file handler. */
|
|
|
2032 handler = Ffind_file_name_handler (filename, Qadd_name_to_file);
|
|
|
2033 if (!NILP (handler))
|
|
|
2034 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename,
|
|
|
2035 newname, ok_if_already_exists));
|
|
|
2036
|
|
|
2037 /* If the new name has special constructs in it,
|
|
|
2038 call the corresponding file handler. */
|
|
|
2039 handler = Ffind_file_name_handler (newname, Qadd_name_to_file);
|
|
|
2040 if (!NILP (handler))
|
|
|
2041 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename,
|
|
|
2042 newname, ok_if_already_exists));
|
|
|
2043
|
|
|
2044 if (NILP (ok_if_already_exists)
|
|
|
2045 || INTP (ok_if_already_exists))
|
|
|
2046 barf_or_query_if_file_exists (newname, "make it a new name",
|
|
|
2047 INTP (ok_if_already_exists), 0);
|
|
|
2048 /* Syncing with FSF 19.34.6 note: FSF does not report a file error
|
|
|
2049 on NT here. --marcpa */
|
|
|
2050 /* But FSF #defines link as sys_link which is supplied in nt.c. We can't do
|
|
|
2051 that because sysfile.h defines sys_link depending on ENCAPSULATE_LINK.
|
|
|
2052 Reverted to previous behavior pending a working fix. (jhar) */
|
|
|
2053 #if defined(WINDOWSNT)
|
|
|
2054 /* Windows does not support this operation. */
|
|
|
2055 report_file_error ("Adding new name", Flist (2, &filename));
|
|
|
2056 #else /* not defined(WINDOWSNT) */
|
|
|
2057
|
|
|
2058 unlink ((char *) XSTRING_DATA (newname));
|
|
|
2059 if (0 > link ((char *) XSTRING_DATA (filename),
|
|
|
2060 (char *) XSTRING_DATA (newname)))
|
|
|
2061 {
|
|
|
2062 report_file_error ("Adding new name",
|
|
|
2063 list2 (filename, newname));
|
|
|
2064 }
|
|
|
2065 #endif /* defined(WINDOWSNT) */
|
|
|
2066
|
|
|
2067 UNGCPRO;
|
|
|
2068 return Qnil;
|
|
|
2069 }
|
|
|
2070
|
|
|
2071 #ifdef S_IFLNK
|
|
|
2072 DEFUN ("make-symbolic-link", Fmake_symbolic_link, 2, 3,
|
|
|
2073 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", /*
|
|
|
2074 Make a symbolic link to FILENAME, named LINKNAME. Both args strings.
|
|
|
2075 Signals a `file-already-exists' error if a file LINKNAME already exists
|
|
|
2076 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
|
|
|
2077 A number as third arg means request confirmation if LINKNAME already exists.
|
|
|
2078 This happens for interactive use with M-x.
|
|
|
2079 */
|
|
|
2080 (filename, linkname, ok_if_already_exists))
|
|
|
2081 {
|
|
|
2082 /* This function can GC. GC checked 1997.06.04. */
|
|
|
2083 Lisp_Object handler;
|
|
|
2084 struct gcpro gcpro1, gcpro2;
|
|
|
2085
|
|
|
2086 GCPRO2 (filename, linkname);
|
|
|
2087 CHECK_STRING (filename);
|
|
|
2088 CHECK_STRING (linkname);
|
|
|
2089 /* If the link target has a ~, we must expand it to get
|
|
|
2090 a truly valid file name. Otherwise, do not expand;
|
|
|
2091 we want to permit links to relative file names. */
|
|
|
2092 if (XSTRING_BYTE (filename, 0) == '~')
|
|
|
2093 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2094 linkname = Fexpand_file_name (linkname, Qnil);
|
|
|
2095
|
|
|
2096 /* If the file name has special constructs in it,
|
|
|
2097 call the corresponding file handler. */
|
|
|
2098 handler = Ffind_file_name_handler (filename, Qmake_symbolic_link);
|
|
|
2099 if (!NILP (handler))
|
|
|
2100 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname,
|
|
|
2101 ok_if_already_exists));
|
|
|
2102
|
|
|
2103 /* If the new link name has special constructs in it,
|
|
|
2104 call the corresponding file handler. */
|
|
|
2105 handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link);
|
|
|
2106 if (!NILP (handler))
|
|
|
2107 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename,
|
|
|
2108 linkname, ok_if_already_exists));
|
|
|
2109
|
|
|
2110 if (NILP (ok_if_already_exists)
|
|
|
2111 || INTP (ok_if_already_exists))
|
|
|
2112 barf_or_query_if_file_exists (linkname, "make it a link",
|
|
|
2113 INTP (ok_if_already_exists), 0);
|
|
|
2114
|
|
|
2115 unlink ((char *) XSTRING_DATA (linkname));
|
|
|
2116 if (0 > symlink ((char *) XSTRING_DATA (filename),
|
|
|
2117 (char *) XSTRING_DATA (linkname)))
|
|
|
2118 {
|
|
|
2119 report_file_error ("Making symbolic link",
|
|
|
2120 list2 (filename, linkname));
|
|
|
2121 }
|
|
|
2122 UNGCPRO;
|
|
|
2123 return Qnil;
|
|
|
2124 }
|
|
|
2125 #endif /* S_IFLNK */
|
|
|
2126
|
|
|
2127 #ifdef HPUX_NET
|
|
|
2128
|
|
|
2129 DEFUN ("sysnetunam", Fsysnetunam, 2, 2, 0, /*
|
|
|
2130 Open a network connection to PATH using LOGIN as the login string.
|
|
|
2131 */
|
|
|
2132 (path, login))
|
|
|
2133 {
|
|
|
2134 int netresult;
|
|
|
2135
|
|
|
2136 CHECK_STRING (path);
|
|
|
2137 CHECK_STRING (login);
|
|
|
2138
|
|
|
2139 /* netunam, being a strange-o system call only used once, is not
|
|
|
2140 encapsulated. */
|
|
|
2141 {
|
|
|
2142 char *path_ext;
|
|
|
2143 char *login_ext;
|
|
|
2144
|
|
|
2145 GET_C_STRING_FILENAME_DATA_ALLOCA (path, path_ext);
|
|
|
2146 GET_C_STRING_EXT_DATA_ALLOCA (login, FORMAT_OS, login_ext);
|
|
|
2147
|
|
|
2148 netresult = netunam (path_ext, login_ext);
|
|
|
2149 }
|
|
|
2150
|
|
|
2151 if (netresult == -1)
|
|
|
2152 return Qnil;
|
|
|
2153 else
|
|
|
2154 return Qt;
|
|
|
2155 }
|
|
|
2156 #endif /* HPUX_NET */
|
|
|
2157
|
|
|
2158 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, 1, 1, 0, /*
|
|
|
2159 Return t if file FILENAME specifies an absolute path name.
|
|
|
2160 On Unix, this is a name starting with a `/' or a `~'.
|
|
|
2161 */
|
|
|
2162 (filename))
|
|
|
2163 {
|
|
|
2164 /* This function does not GC */
|
|
|
2165 Bufbyte *ptr;
|
|
|
2166
|
|
|
2167 CHECK_STRING (filename);
|
|
|
2168 ptr = XSTRING_DATA (filename);
|
|
|
2169 return (IS_DIRECTORY_SEP (*ptr) || *ptr == '~'
|
|
|
2170 #ifdef WINDOWSNT
|
|
|
2171 || (IS_DRIVE (*ptr) && ptr[1] == ':' && IS_DIRECTORY_SEP (ptr[2]))
|
|
|
2172 #endif
|
|
|
2173 ) ? Qt : Qnil;
|
|
|
2174 }
|
|
|
2175
|
|
|
2176 /* Return nonzero if file FILENAME exists and can be executed. */
|
|
|
2177
|
|
|
2178 static int
|
|
|
2179 check_executable (char *filename)
|
|
|
2180 {
|
|
|
2181 #ifdef WINDOWSNT
|
|
|
2182 struct stat st;
|
|
|
2183 if (stat (filename, &st) < 0)
|
|
|
2184 return 0;
|
|
|
2185 return ((st.st_mode & S_IEXEC) != 0);
|
|
|
2186 #else /* not WINDOWSNT */
|
|
|
2187 #ifdef HAVE_EACCESS
|
|
|
2188 return eaccess (filename, 1) >= 0;
|
|
|
2189 #else
|
|
|
2190 /* Access isn't quite right because it uses the real uid
|
|
|
2191 and we really want to test with the effective uid.
|
|
|
2192 But Unix doesn't give us a right way to do it. */
|
|
|
2193 return access (filename, 1) >= 0;
|
|
|
2194 #endif /* HAVE_EACCESS */
|
|
|
2195 #endif /* not WINDOWSNT */
|
|
|
2196 }
|
|
|
2197
|
|
|
2198 /* Return nonzero if file FILENAME exists and can be written. */
|
|
|
2199
|
|
|
2200 static int
|
|
|
2201 check_writable (CONST char *filename)
|
|
|
2202 {
|
|
|
2203 #ifdef HAVE_EACCESS
|
|
|
2204 return (eaccess (filename, 2) >= 0);
|
|
|
2205 #else
|
|
|
2206 /* Access isn't quite right because it uses the real uid
|
|
|
2207 and we really want to test with the effective uid.
|
|
|
2208 But Unix doesn't give us a right way to do it.
|
|
|
2209 Opening with O_WRONLY could work for an ordinary file,
|
|
|
2210 but would lose for directories. */
|
|
|
2211 return (access (filename, 2) >= 0);
|
|
|
2212 #endif
|
|
|
2213 }
|
|
|
2214
|
|
|
2215 DEFUN ("file-exists-p", Ffile_exists_p, 1, 1, 0, /*
|
|
|
2216 Return t if file FILENAME exists. (This does not mean you can read it.)
|
|
|
2217 See also `file-readable-p' and `file-attributes'.
|
|
|
2218 */
|
|
|
2219 (filename))
|
|
|
2220 {
|
|
|
2221 /* This function can call lisp */
|
|
|
2222 Lisp_Object abspath;
|
|
|
2223 Lisp_Object handler;
|
|
|
2224 struct stat statbuf;
|
|
|
2225 struct gcpro gcpro1;
|
|
|
2226
|
|
|
2227 CHECK_STRING (filename);
|
|
|
2228 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2229
|
|
|
2230 /* If the file name has special constructs in it,
|
|
|
2231 call the corresponding file handler. */
|
|
|
2232 GCPRO1 (abspath);
|
|
|
2233 handler = Ffind_file_name_handler (abspath, Qfile_exists_p);
|
|
|
2234 UNGCPRO;
|
|
|
2235 if (!NILP (handler))
|
|
|
2236 return call2 (handler, Qfile_exists_p, abspath);
|
|
|
2237
|
|
|
2238 return stat ((char *) XSTRING_DATA (abspath), &statbuf) >= 0 ? Qt : Qnil;
|
|
|
2239 }
|
|
|
2240
|
|
|
2241 DEFUN ("file-executable-p", Ffile_executable_p, 1, 1, 0, /*
|
|
|
2242 Return t if FILENAME can be executed by you.
|
|
|
2243 For a directory, this means you can access files in that directory.
|
|
|
2244 */
|
|
|
2245 (filename))
|
|
|
2246
|
|
|
2247 {
|
|
|
2248 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2249 Lisp_Object abspath;
|
|
|
2250 Lisp_Object handler;
|
|
|
2251 struct gcpro gcpro1;
|
|
|
2252
|
|
|
2253 CHECK_STRING (filename);
|
|
|
2254 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2255
|
|
|
2256 /* If the file name has special constructs in it,
|
|
|
2257 call the corresponding file handler. */
|
|
|
2258 GCPRO1 (abspath);
|
|
|
2259 handler = Ffind_file_name_handler (abspath, Qfile_executable_p);
|
|
|
2260 UNGCPRO;
|
|
|
2261 if (!NILP (handler))
|
|
|
2262 return call2 (handler, Qfile_executable_p, abspath);
|
|
|
2263
|
|
|
2264 return check_executable ((char *) XSTRING_DATA (abspath)) ? Qt : Qnil;
|
|
|
2265 }
|
|
|
2266
|
|
|
2267 DEFUN ("file-readable-p", Ffile_readable_p, 1, 1, 0, /*
|
|
|
2268 Return t if file FILENAME exists and you can read it.
|
|
|
2269 See also `file-exists-p' and `file-attributes'.
|
|
|
2270 */
|
|
|
2271 (filename))
|
|
|
2272 {
|
|
|
2273 /* This function can GC */
|
|
|
2274 Lisp_Object abspath = Qnil;
|
|
|
2275 Lisp_Object handler;
|
|
|
2276 struct gcpro gcpro1;
|
|
|
2277 GCPRO1 (abspath);
|
|
|
2278
|
|
|
2279 CHECK_STRING (filename);
|
|
|
2280 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2281
|
|
|
2282 /* If the file name has special constructs in it,
|
|
|
2283 call the corresponding file handler. */
|
|
|
2284 handler = Ffind_file_name_handler (abspath, Qfile_readable_p);
|
|
|
2285 if (!NILP (handler))
|
|
|
2286 RETURN_UNGCPRO (call2 (handler, Qfile_readable_p, abspath));
|
|
|
2287
|
|
|
2288 #if defined(WINDOWSNT) || defined(__CYGWIN32__)
|
|
|
2289 /* Under MS-DOS and Windows, open does not work for directories. */
|
|
|
2290 UNGCPRO;
|
|
|
2291 if (access (XSTRING_DATA (abspath), 0) == 0)
|
|
|
2292 return Qt;
|
|
|
2293 else
|
|
|
2294 return Qnil;
|
|
|
2295 #else /* not WINDOWSNT */
|
|
|
2296 {
|
|
|
2297 int desc = interruptible_open ((char *) XSTRING_DATA (abspath), O_RDONLY | OPEN_BINARY, 0);
|
|
|
2298 UNGCPRO;
|
|
|
2299 if (desc < 0)
|
|
|
2300 return Qnil;
|
|
|
2301 close (desc);
|
|
|
2302 return Qt;
|
|
|
2303 }
|
|
|
2304 #endif /* not WINDOWSNT */
|
|
|
2305 }
|
|
|
2306
|
|
|
2307 /* Having this before file-symlink-p mysteriously caused it to be forgotten
|
|
|
2308 on the RT/PC. */
|
|
|
2309 DEFUN ("file-writable-p", Ffile_writable_p, 1, 1, 0, /*
|
|
|
2310 Return t if file FILENAME can be written or created by you.
|
|
|
2311 */
|
|
|
2312 (filename))
|
|
|
2313 {
|
|
|
2314 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2315 Lisp_Object abspath, dir;
|
|
|
2316 Lisp_Object handler;
|
|
|
2317 struct stat statbuf;
|
|
|
2318 struct gcpro gcpro1;
|
|
|
2319
|
|
|
2320 CHECK_STRING (filename);
|
|
|
2321 abspath = Fexpand_file_name (filename, Qnil);
|
|
|
2322
|
|
|
2323 /* If the file name has special constructs in it,
|
|
|
2324 call the corresponding file handler. */
|
|
|
2325 GCPRO1 (abspath);
|
|
|
2326 handler = Ffind_file_name_handler (abspath, Qfile_writable_p);
|
|
|
2327 UNGCPRO;
|
|
|
2328 if (!NILP (handler))
|
|
|
2329 return call2 (handler, Qfile_writable_p, abspath);
|
|
|
2330
|
|
|
2331 if (stat ((char *) XSTRING_DATA (abspath), &statbuf) >= 0)
|
|
|
2332 return (check_writable ((char *) XSTRING_DATA (abspath))
|
|
|
2333 ? Qt : Qnil);
|
|
|
2334
|
|
|
2335
|
|
|
2336 GCPRO1 (abspath);
|
|
|
2337 dir = Ffile_name_directory (abspath);
|
|
|
2338 UNGCPRO;
|
|
|
2339 return (check_writable (!NILP (dir) ? (char *) XSTRING_DATA (dir)
|
|
|
2340 : "")
|
|
|
2341 ? Qt : Qnil);
|
|
|
2342 }
|
|
|
2343
|
|
|
2344 DEFUN ("file-symlink-p", Ffile_symlink_p, 1, 1, 0, /*
|
|
|
2345 Return non-nil if file FILENAME is the name of a symbolic link.
|
|
|
2346 The value is the name of the file to which it is linked.
|
|
|
2347 Otherwise returns nil.
|
|
|
2348 */
|
|
|
2349 (filename))
|
|
|
2350 {
|
|
|
2351 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2352 #ifdef S_IFLNK
|
|
|
2353 char *buf;
|
|
|
2354 int bufsize;
|
|
|
2355 int valsize;
|
|
|
2356 Lisp_Object val;
|
|
|
2357 Lisp_Object handler;
|
|
|
2358 struct gcpro gcpro1;
|
|
|
2359
|
|
|
2360 CHECK_STRING (filename);
|
|
|
2361 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2362
|
|
|
2363 /* If the file name has special constructs in it,
|
|
|
2364 call the corresponding file handler. */
|
|
|
2365 GCPRO1 (filename);
|
|
|
2366 handler = Ffind_file_name_handler (filename, Qfile_symlink_p);
|
|
|
2367 UNGCPRO;
|
|
|
2368 if (!NILP (handler))
|
|
|
2369 return call2 (handler, Qfile_symlink_p, filename);
|
|
|
2370
|
|
|
2371 bufsize = 100;
|
|
|
2372 while (1)
|
|
|
2373 {
|
|
|
2374 buf = xnew_array_and_zero (char, bufsize);
|
|
|
2375 valsize = readlink ((char *) XSTRING_DATA (filename),
|
|
|
2376 buf, bufsize);
|
|
|
2377 if (valsize < bufsize) break;
|
|
|
2378 /* Buffer was not long enough */
|
|
|
2379 xfree (buf);
|
|
|
2380 bufsize *= 2;
|
|
|
2381 }
|
|
|
2382 if (valsize == -1)
|
|
|
2383 {
|
|
|
2384 xfree (buf);
|
|
|
2385 return Qnil;
|
|
|
2386 }
|
|
|
2387 val = make_string ((Bufbyte *) buf, valsize);
|
|
|
2388 xfree (buf);
|
|
|
2389 return val;
|
|
|
2390 #else /* not S_IFLNK */
|
|
|
2391 return Qnil;
|
|
|
2392 #endif /* not S_IFLNK */
|
|
|
2393 }
|
|
|
2394
|
|
|
2395 DEFUN ("file-directory-p", Ffile_directory_p, 1, 1, 0, /*
|
|
|
2396 Return t if file FILENAME is the name of a directory as a file.
|
|
|
2397 A directory name spec may be given instead; then the value is t
|
|
|
2398 if the directory so specified exists and really is a directory.
|
|
|
2399 */
|
|
|
2400 (filename))
|
|
|
2401 {
|
|
|
2402 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2403 Lisp_Object abspath;
|
|
|
2404 struct stat st;
|
|
|
2405 Lisp_Object handler;
|
|
|
2406 struct gcpro gcpro1;
|
|
|
2407
|
|
|
2408 GCPRO1 (current_buffer->directory);
|
|
|
2409 abspath = expand_and_dir_to_file (filename,
|
|
|
2410 current_buffer->directory);
|
|
|
2411 UNGCPRO;
|
|
|
2412
|
|
|
2413 /* If the file name has special constructs in it,
|
|
|
2414 call the corresponding file handler. */
|
|
|
2415 GCPRO1 (abspath);
|
|
|
2416 handler = Ffind_file_name_handler (abspath, Qfile_directory_p);
|
|
|
2417 UNGCPRO;
|
|
|
2418 if (!NILP (handler))
|
|
|
2419 return call2 (handler, Qfile_directory_p, abspath);
|
|
|
2420
|
|
|
2421 if (stat ((char *) XSTRING_DATA (abspath), &st) < 0)
|
|
|
2422 return Qnil;
|
|
|
2423 return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil;
|
|
|
2424 }
|
|
|
2425
|
|
|
2426 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, 1, 1, 0, /*
|
|
|
2427 Return t if file FILENAME is the name of a directory as a file,
|
|
|
2428 and files in that directory can be opened by you. In order to use a
|
|
|
2429 directory as a buffer's current directory, this predicate must return true.
|
|
|
2430 A directory name spec may be given instead; then the value is t
|
|
|
2431 if the directory so specified exists and really is a readable and
|
|
|
2432 searchable directory.
|
|
|
2433 */
|
|
|
2434 (filename))
|
|
|
2435 {
|
|
|
2436 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2437 Lisp_Object handler;
|
|
|
2438
|
|
|
2439 /* If the file name has special constructs in it,
|
|
|
2440 call the corresponding file handler. */
|
|
|
2441 handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p);
|
|
|
2442 if (!NILP (handler))
|
|
|
2443 return call2 (handler, Qfile_accessible_directory_p,
|
|
|
2444 filename);
|
|
|
2445
|
|
|
2446 #if !defined(WINDOWSNT)
|
|
|
2447 if (NILP (Ffile_directory_p (filename)))
|
|
|
2448 return (Qnil);
|
|
|
2449 else
|
|
|
2450 return Ffile_executable_p (filename);
|
|
|
2451 #else
|
|
|
2452 {
|
|
|
2453 int tem;
|
|
|
2454 struct gcpro gcpro1;
|
|
|
2455 /* It's an unlikely combination, but yes we really do need to gcpro:
|
|
|
2456 Suppose that file-accessible-directory-p has no handler, but
|
|
|
2457 file-directory-p does have a handler; this handler causes a GC which
|
|
|
2458 relocates the string in `filename'; and finally file-directory-p
|
|
|
2459 returns non-nil. Then we would end up passing a garbaged string
|
|
|
2460 to file-executable-p. */
|
|
|
2461 GCPRO1 (filename);
|
|
|
2462 tem = (NILP (Ffile_directory_p (filename))
|
|
|
2463 || NILP (Ffile_executable_p (filename)));
|
|
|
2464 UNGCPRO;
|
|
|
2465 return tem ? Qnil : Qt;
|
|
|
2466 }
|
|
|
2467 #endif /* !defined(WINDOWSNT) */
|
|
|
2468 }
|
|
|
2469
|
|
|
2470 DEFUN ("file-regular-p", Ffile_regular_p, 1, 1, 0, /*
|
|
|
2471 Return t if file FILENAME is the name of a regular file.
|
|
|
2472 This is the sort of file that holds an ordinary stream of data bytes.
|
|
|
2473 */
|
|
|
2474 (filename))
|
|
|
2475 {
|
|
|
2476 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2477 Lisp_Object abspath;
|
|
|
2478 struct stat st;
|
|
|
2479 Lisp_Object handler;
|
|
|
2480 struct gcpro gcpro1;
|
|
|
2481
|
|
|
2482 GCPRO1 (current_buffer->directory);
|
|
|
2483 abspath = expand_and_dir_to_file (filename, current_buffer->directory);
|
|
|
2484 UNGCPRO;
|
|
|
2485
|
|
|
2486 /* If the file name has special constructs in it,
|
|
|
2487 call the corresponding file handler. */
|
|
|
2488 GCPRO1 (abspath);
|
|
|
2489 handler = Ffind_file_name_handler (abspath, Qfile_regular_p);
|
|
|
2490 UNGCPRO;
|
|
|
2491 if (!NILP (handler))
|
|
|
2492 return call2 (handler, Qfile_regular_p, abspath);
|
|
|
2493
|
|
|
2494 if (stat ((char *) XSTRING_DATA (abspath), &st) < 0)
|
|
|
2495 return Qnil;
|
|
|
2496 return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil;
|
|
|
2497 }
|
|
|
2498
|
|
|
2499 DEFUN ("file-modes", Ffile_modes, 1, 1, 0, /*
|
|
|
2500 Return mode bits of FILE, as an integer.
|
|
|
2501 */
|
|
|
2502 (filename))
|
|
|
2503 {
|
|
|
2504 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2505 Lisp_Object abspath;
|
|
|
2506 struct stat st;
|
|
|
2507 Lisp_Object handler;
|
|
|
2508 struct gcpro gcpro1;
|
|
|
2509
|
|
|
2510 GCPRO1 (current_buffer->directory);
|
|
|
2511 abspath = expand_and_dir_to_file (filename,
|
|
|
2512 current_buffer->directory);
|
|
|
2513 UNGCPRO;
|
|
|
2514
|
|
|
2515 /* If the file name has special constructs in it,
|
|
|
2516 call the corresponding file handler. */
|
|
|
2517 GCPRO1 (abspath);
|
|
|
2518 handler = Ffind_file_name_handler (abspath, Qfile_modes);
|
|
|
2519 UNGCPRO;
|
|
|
2520 if (!NILP (handler))
|
|
|
2521 return call2 (handler, Qfile_modes, abspath);
|
|
|
2522
|
|
|
2523 if (stat ((char *) XSTRING_DATA (abspath), &st) < 0)
|
|
|
2524 return Qnil;
|
|
|
2525 /* Syncing with FSF 19.34.6 note: not in FSF, #if 0'ed out here. */
|
|
|
2526 #if 0
|
|
|
2527 #ifdef DOS_NT
|
|
|
2528 if (check_executable (XSTRING_DATA (abspath)))
|
|
|
2529 st.st_mode |= S_IEXEC;
|
|
|
2530 #endif /* DOS_NT */
|
|
|
2531 #endif /* 0 */
|
|
|
2532
|
|
|
2533 return make_int (st.st_mode & 07777);
|
|
|
2534 }
|
|
|
2535
|
|
|
2536 DEFUN ("set-file-modes", Fset_file_modes, 2, 2, 0, /*
|
|
|
2537 Set mode bits of FILE to MODE (an integer).
|
|
|
2538 Only the 12 low bits of MODE are used.
|
|
|
2539 */
|
|
|
2540 (filename, mode))
|
|
|
2541 {
|
|
|
2542 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2543 Lisp_Object abspath;
|
|
|
2544 Lisp_Object handler;
|
|
|
2545 struct gcpro gcpro1;
|
|
|
2546
|
|
|
2547 GCPRO1 (current_buffer->directory);
|
|
|
2548 abspath = Fexpand_file_name (filename, current_buffer->directory);
|
|
|
2549 UNGCPRO;
|
|
|
2550
|
|
|
2551 CHECK_INT (mode);
|
|
|
2552
|
|
|
2553 /* If the file name has special constructs in it,
|
|
|
2554 call the corresponding file handler. */
|
|
|
2555 GCPRO1 (abspath);
|
|
|
2556 handler = Ffind_file_name_handler (abspath, Qset_file_modes);
|
|
|
2557 UNGCPRO;
|
|
|
2558 if (!NILP (handler))
|
|
|
2559 return call3 (handler, Qset_file_modes, abspath, mode);
|
|
|
2560
|
|
|
2561 if (chmod ((char *) XSTRING_DATA (abspath), XINT (mode)) < 0)
|
|
|
2562 report_file_error ("Doing chmod", list1 (abspath));
|
|
|
2563
|
|
|
2564 return Qnil;
|
|
|
2565 }
|
|
|
2566
|
|
|
2567 DEFUN ("set-default-file-modes", Fset_default_file_modes, 1, 1, 0, /*
|
|
|
2568 Set the file permission bits for newly created files.
|
|
|
2569 MASK should be an integer; if a permission's bit in MASK is 1,
|
|
|
2570 subsequently created files will not have that permission enabled.
|
|
|
2571 Only the low 9 bits are used.
|
|
|
2572 This setting is inherited by subprocesses.
|
|
|
2573 */
|
|
|
2574 (mode))
|
|
|
2575 {
|
|
|
2576 CHECK_INT (mode);
|
|
|
2577
|
|
|
2578 umask ((~ XINT (mode)) & 0777);
|
|
|
2579
|
|
|
2580 return Qnil;
|
|
|
2581 }
|
|
|
2582
|
|
|
2583 DEFUN ("default-file-modes", Fdefault_file_modes, 0, 0, 0, /*
|
|
|
2584 Return the default file protection for created files.
|
|
|
2585 The umask value determines which permissions are enabled in newly
|
|
|
2586 created files. If a permission's bit in the umask is 1, subsequently
|
|
|
2587 created files will not have that permission enabled.
|
|
|
2588 */
|
|
|
2589 ())
|
|
|
2590 {
|
|
|
2591 int mode;
|
|
|
2592
|
|
|
2593 mode = umask (0);
|
|
|
2594 umask (mode);
|
|
|
2595
|
|
|
2596 return make_int ((~ mode) & 0777);
|
|
|
2597 }
|
|
|
2598
|
|
|
2599 DEFUN ("unix-sync", Funix_sync, 0, 0, "", /*
|
|
|
2600 Tell Unix to finish all pending disk updates.
|
|
|
2601 */
|
|
|
2602 ())
|
|
|
2603 {
|
|
|
2604 #ifndef WINDOWSNT
|
|
|
2605 sync ();
|
|
|
2606 #endif
|
|
|
2607 return Qnil;
|
|
|
2608 }
|
|
|
2609
|
|
|
2610
|
|
|
2611 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, 2, 2, 0, /*
|
|
|
2612 Return t if file FILE1 is newer than file FILE2.
|
|
|
2613 If FILE1 does not exist, the answer is nil;
|
|
|
2614 otherwise, if FILE2 does not exist, the answer is t.
|
|
|
2615 */
|
|
|
2616 (file1, file2))
|
|
|
2617 {
|
|
|
2618 /* This function can GC. GC checked 1997.04.10. */
|
|
|
2619 Lisp_Object abspath1, abspath2;
|
|
|
2620 struct stat st;
|
|
|
2621 int mtime1;
|
|
|
2622 Lisp_Object handler;
|
|
|
2623 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
2624
|
|
|
2625 CHECK_STRING (file1);
|
|
|
2626 CHECK_STRING (file2);
|
|
|
2627
|
|
|
2628 abspath1 = Qnil;
|
|
|
2629 abspath2 = Qnil;
|
|
|
2630
|
|
|
2631 GCPRO3 (abspath1, abspath2, current_buffer->directory);
|
|
|
2632 abspath1 = expand_and_dir_to_file (file1, current_buffer->directory);
|
|
|
2633 abspath2 = expand_and_dir_to_file (file2, current_buffer->directory);
|
|
|
2634
|
|
|
2635 /* If the file name has special constructs in it,
|
|
|
2636 call the corresponding file handler. */
|
|
|
2637 handler = Ffind_file_name_handler (abspath1, Qfile_newer_than_file_p);
|
|
|
2638 if (NILP (handler))
|
|
|
2639 handler = Ffind_file_name_handler (abspath2, Qfile_newer_than_file_p);
|
|
|
2640 UNGCPRO;
|
|
|
2641 if (!NILP (handler))
|
|
|
2642 return call3 (handler, Qfile_newer_than_file_p, abspath1,
|
|
|
2643 abspath2);
|
|
|
2644
|
|
|
2645 if (stat ((char *) XSTRING_DATA (abspath1), &st) < 0)
|
|
|
2646 return Qnil;
|
|
|
2647
|
|
|
2648 mtime1 = st.st_mtime;
|
|
|
2649
|
|
|
2650 if (stat ((char *) XSTRING_DATA (abspath2), &st) < 0)
|
|
|
2651 return Qt;
|
|
|
2652
|
|
|
2653 return (mtime1 > st.st_mtime) ? Qt : Qnil;
|
|
|
2654 }
|
|
|
2655
|
|
|
2656
|
|
|
2657 /* Stack sizes > 2**16 is a good way to elicit compiler bugs */
|
|
|
2658 /* #define READ_BUF_SIZE (2 << 16) */
|
|
|
2659 #define READ_BUF_SIZE (1 << 15)
|
|
|
2660
|
|
|
2661 DEFUN ("insert-file-contents-internal", Finsert_file_contents_internal,
|
|
|
2662 1, 7, 0, /*
|
|
|
2663 Insert contents of file FILENAME after point; no coding-system frobbing.
|
|
|
2664 This function is identical to `insert-file-contents' except for the
|
|
|
2665 handling of the CODESYS and USED-CODESYS arguments under
|
|
|
2666 XEmacs/Mule. (When Mule support is not present, both functions are
|
|
|
2667 identical and ignore the CODESYS and USED-CODESYS arguments.)
|
|
|
2668
|
|
|
2669 If support for Mule exists in this Emacs, the file is decoded according
|
|
|
2670 to CODESYS; if omitted, no conversion happens. If USED-CODESYS is non-nil,
|
|
|
2671 it should be a symbol, and the actual coding system that was used for the
|
|
|
2672 decoding is stored into it. It will in general be different from CODESYS
|
|
|
2673 if CODESYS specifies automatic encoding detection or end-of-line detection.
|
|
|
2674
|
|
|
2675 Currently BEG and END refer to byte positions (as opposed to character
|
|
|
2676 positions), even in Mule. (Fixing this is very difficult.)
|
|
|
2677 */
|
|
|
2678 (filename, visit, beg, end, replace, codesys, used_codesys))
|
|
|
2679 {
|
|
|
2680 /* This function can call lisp */
|
|
|
2681 /* #### dmoore - this function hasn't been checked for gc recently */
|
|
|
2682 struct stat st;
|
|
|
2683 int fd;
|
|
|
2684 int saverrno = 0;
|
|
|
2685 Charcount inserted = 0;
|
|
|
2686 int speccount;
|
|
|
2687 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
2688 Lisp_Object handler = Qnil, val;
|
|
|
2689 int total;
|
|
|
2690 Bufbyte read_buf[READ_BUF_SIZE];
|
|
|
2691 int mc_count;
|
|
|
2692 struct buffer *buf = current_buffer;
|
|
|
2693 Lisp_Object curbuf;
|
|
|
2694 int not_regular = 0;
|
|
|
2695
|
|
|
2696 if (buf->base_buffer && ! NILP (visit))
|
|
|
2697 error ("Cannot do file visiting in an indirect buffer");
|
|
|
2698
|
|
|
2699 /* No need to call Fbarf_if_buffer_read_only() here.
|
|
|
2700 That's called in begin_multiple_change() or wherever. */
|
|
|
2701
|
|
|
2702 val = Qnil;
|
|
|
2703
|
|
|
2704 /* #### dmoore - should probably check in various places to see if
|
|
|
2705 curbuf was killed and if so signal an error? */
|
|
|
2706
|
|
|
2707 XSETBUFFER (curbuf, buf);
|
|
|
2708
|
|
|
2709 GCPRO5 (filename, val, visit, handler, curbuf);
|
|
|
2710
|
|
|
2711 mc_count = (NILP (replace)) ?
|
|
|
2712 begin_multiple_change (buf, BUF_PT (buf), BUF_PT (buf)) :
|
|
|
2713 begin_multiple_change (buf, BUF_BEG (buf), BUF_Z (buf));
|
|
|
2714
|
|
|
2715 speccount = specpdl_depth (); /* begin_multiple_change also adds
|
|
|
2716 an unwind_protect */
|
|
|
2717
|
|
|
2718 filename = Fexpand_file_name (filename, Qnil);
|
|
|
2719
|
|
|
2720 /* If the file name has special constructs in it,
|
|
|
2721 call the corresponding file handler. */
|
|
|
2722 handler = Ffind_file_name_handler (filename, Qinsert_file_contents);
|
|
|
2723 if (!NILP (handler))
|
|
|
2724 {
|
|
|
2725 val = call6 (handler, Qinsert_file_contents, filename,
|
|
|
2726 visit, beg, end, replace);
|
|
|
2727 goto handled;
|
|
|
2728 }
|
|
|
2729
|
|
|
2730 #ifdef FILE_CODING
|
|
|
2731 if (!NILP (used_codesys))
|
|
|
2732 CHECK_SYMBOL (used_codesys);
|
|
|
2733 #endif
|
|
|
2734
|
|
|
2735 if ( (!NILP (beg) || !NILP (end)) && !NILP (visit) )
|
|
|
2736 error ("Attempt to visit less than an entire file");
|
|
|
2737
|
|
|
2738 fd = -1;
|
|
|
2739
|
|
|
2740 if (
|
|
|
2741 #ifndef APOLLO
|
|
|
2742 (stat ((char *) XSTRING_DATA (filename), &st) < 0)
|
|
|
2743 #else /* APOLLO */
|
|
|
2744 /* Don't even bother with interruptible_open. APOLLO sucks. */
|
|
|
2745 ((fd = open ((char *) XSTRING_DATA (filename), O_RDONLY | OPEN_BINARY, 0)) < 0
|
|
|
2746 || fstat (fd, &st) < 0)
|
|
|
2747 #endif /* APOLLO */
|
|
|
2748 )
|
|
|
2749 {
|
|
|
2750 if (fd >= 0) close (fd);
|
|
|
2751 badopen:
|
|
|
2752 if (NILP (visit))
|
|
|
2753 report_file_error ("Opening input file", list1 (filename));
|
|
|
2754 st.st_mtime = -1;
|
|
|
2755 goto notfound;
|
|
|
2756 }
|
|
|
2757
|
|
|
2758 #ifdef S_IFREG
|
|
|
2759 /* Signal an error if we are accessing a non-regular file, with
|
|
|
2760 REPLACE, BEG or END being non-nil. */
|
|
|
2761 if (!S_ISREG (st.st_mode))
|
|
|
2762 {
|
|
|
2763 not_regular = 1;
|
|
|
2764
|
|
|
2765 if (!NILP (visit))
|
|
|
2766 goto notfound;
|
|
|
2767
|
|
|
2768 if (!NILP (replace) || !NILP (beg) || !NILP (end))
|
|
|
2769 {
|
|
|
2770 end_multiple_change (buf, mc_count);
|
|
|
2771
|
|
|
2772 return Fsignal (Qfile_error,
|
|
|
2773 list2 (build_translated_string("not a regular file"),
|
|
|
2774 filename));
|
|
|
2775 }
|
|
|
2776 }
|
|
|
2777 #endif /* S_IFREG */
|
|
|
2778
|
|
|
2779 if (!NILP (beg))
|
|
|
2780 CHECK_INT (beg);
|
|
|
2781 else
|
|
|
2782 beg = Qzero;
|
|
|
2783
|
|
|
2784 if (!NILP (end))
|
|
|
2785 CHECK_INT (end);
|
|
|
2786
|
|
|
2787 if (fd < 0)
|
|
|
2788 {
|
|
|
2789 if ((fd = interruptible_open ((char *) XSTRING_DATA (filename),
|
|
|
2790 O_RDONLY | OPEN_BINARY, 0)) < 0)
|
|
|
2791 goto badopen;
|
|
|
2792 }
|
|
|
2793
|
|
|
2794 /* Replacement should preserve point as it preserves markers. */
|
|
|
2795 if (!NILP (replace))
|
|
|
2796 record_unwind_protect (restore_point_unwind, Fpoint_marker (Qnil, Qnil));
|
|
|
2797
|
|
|
2798 record_unwind_protect (close_file_unwind, make_int (fd));
|
|
|
2799
|
|
|
2800 /* Supposedly happens on VMS. */
|
|
|
2801 if (st.st_size < 0)
|
|
|
2802 error ("File size is negative");
|
|
|
2803
|
|
|
2804 if (NILP (end))
|
|
|
2805 {
|
|
|
2806 if (!not_regular)
|
|
|
2807 {
|
|
|
2808 end = make_int (st.st_size);
|
|
|
2809 if (XINT (end) != st.st_size)
|
|
|
2810 error ("Maximum buffer size exceeded");
|
|
|
2811 }
|
|
|
2812 }
|
|
|
2813
|
|
|
2814 /* If requested, replace the accessible part of the buffer
|
|
|
2815 with the file contents. Avoid replacing text at the
|
|
|
2816 beginning or end of the buffer that matches the file contents;
|
|
|
2817 that preserves markers pointing to the unchanged parts. */
|
|
|
2818 #if !defined (FILE_CODING)
|
|
|
2819 /* The replace-mode code currently only works when the assumption
|
|
|
2820 'one byte == one char' holds true. This fails Mule because
|
|
|
2821 files may contain multibyte characters. It holds under Windows NT
|
|
|
2822 provided we convert CRLF into LF. */
|
|
|
2823 # define FSFMACS_SPEEDY_INSERT
|
|
|
2824 #endif /* !defined (FILE_CODING) */
|
|
|
2825
|
|
|
2826 #ifndef FSFMACS_SPEEDY_INSERT
|
|
|
2827 if (!NILP (replace))
|
|
|
2828 {
|
|
|
2829 buffer_delete_range (buf, BUF_BEG (buf), BUF_Z (buf),
|
|
|
2830 !NILP (visit) ? INSDEL_NO_LOCKING : 0);
|
|
|
2831 }
|
|
|
2832 #else /* FSFMACS_SPEEDY_INSERT */
|
|
|
2833 if (!NILP (replace))
|
|
|
2834 {
|
|
|
2835 char buffer[1 << 14];
|
|
|
2836 Bufpos same_at_start = BUF_BEGV (buf);
|
|
|
2837 Bufpos same_at_end = BUF_ZV (buf);
|
|
|
2838 int overlap;
|
|
|
2839
|
|
|
2840 /* Count how many chars at the start of the file
|
|
|
2841 match the text at the beginning of the buffer. */
|
|
|
2842 while (1)
|
|
|
2843 {
|
|
|
2844 int nread;
|
|
|
2845 Bufpos bufpos;
|
|
|
2846 nread = read_allowing_quit (fd, buffer, sizeof buffer);
|
|
|
2847 if (nread < 0)
|
|
|
2848 error ("IO error reading %s: %s",
|
|
|
2849 XSTRING_DATA (filename), strerror (errno));
|
|
|
2850 else if (nread == 0)
|
|
|
2851 break;
|
|
|
2852 bufpos = 0;
|
|
|
2853 while (bufpos < nread && same_at_start < BUF_ZV (buf)
|
|
|
2854 && BUF_FETCH_CHAR (buf, same_at_start) == buffer[bufpos])
|
|
|
2855 same_at_start++, bufpos++;
|
|
|
2856 /* If we found a discrepancy, stop the scan.
|
|
|
2857 Otherwise loop around and scan the next bufferful. */
|
|
|
2858 if (bufpos != nread)
|
|
|
2859 break;
|
|
|
2860 }
|
|
|
2861 /* If the file matches the buffer completely,
|
|
|
2862 there's no need to replace anything. */
|
|
|
2863 if (same_at_start - BUF_BEGV (buf) == st.st_size)
|
|
|
2864 {
|
|
|
2865 close (fd);
|
|
|
2866 unbind_to (speccount, Qnil);
|
|
|
2867 /* Truncate the buffer to the size of the file. */
|
|
|
2868 buffer_delete_range (buf, same_at_start, same_at_end,
|
|
|
2869 !NILP (visit) ? INSDEL_NO_LOCKING : 0);
|
|
|
2870 goto handled;
|
|
|
2871 }
|
|
|
2872 /* Count how many chars at the end of the file
|
|
|
2873 match the text at the end of the buffer. */
|
|
|
2874 while (1)
|
|
|
2875 {
|
|
|
2876 int total_read, nread;
|
|
|
2877 Bufpos bufpos, curpos, trial;
|
|
|
2878
|
|
|
2879 /* At what file position are we now scanning? */
|
|
|
2880 curpos = st.st_size - (BUF_ZV (buf) - same_at_end);
|
|
|
2881 /* If the entire file matches the buffer tail, stop the scan. */
|
|
|
2882 if (curpos == 0)
|
|
|
2883 break;
|
|
|
2884 /* How much can we scan in the next step? */
|
|
|
2885 trial = min (curpos, (Bufpos) sizeof (buffer));
|
|
|
2886 if (lseek (fd, curpos - trial, 0) < 0)
|
|
|
2887 report_file_error ("Setting file position", list1 (filename));
|
|
|
2888
|
|
|
2889 total_read = 0;
|
|
|
2890 while (total_read < trial)
|
|
|
2891 {
|
|
|
2892 nread = read_allowing_quit (fd, buffer + total_read,
|
|
|
2893 trial - total_read);
|
|
|
2894 if (nread <= 0)
|
|
|
2895 report_file_error ("IO error reading file", list1 (filename));
|
|
|
2896 total_read += nread;
|
|
|
2897 }
|
|
|
2898 /* Scan this bufferful from the end, comparing with
|
|
|
2899 the Emacs buffer. */
|
|
|
2900 bufpos = total_read;
|
|
|
2901 /* Compare with same_at_start to avoid counting some buffer text
|
|
|
2902 as matching both at the file's beginning and at the end. */
|
|
|
2903 while (bufpos > 0 && same_at_end > same_at_start
|
|
|
2904 && BUF_FETCH_CHAR (buf, same_at_end - 1) ==
|
|
|
2905 buffer[bufpos - 1])
|
|
|
2906 same_at_end--, bufpos--;
|
|
|
2907 /* If we found a discrepancy, stop the scan.
|
|
|
2908 Otherwise loop around and scan the preceding bufferful. */
|
|
|
2909 if (bufpos != 0)
|
|
|
2910 break;
|
|
|
2911 /* If display current starts at beginning of line,
|
|
|
2912 keep it that way. */
|
|
|
2913 if (XBUFFER (XWINDOW (Fselected_window (Qnil))->buffer) == buf)
|
|
|
2914 XWINDOW (Fselected_window (Qnil))->start_at_line_beg =
|
|
|
2915 !NILP (Fbolp (make_buffer (buf)));
|
|
|
2916 }
|
|
|
2917
|
|
|
2918 /* Don't try to reuse the same piece of text twice. */
|
|
|
2919 overlap = same_at_start - BUF_BEGV (buf) -
|
|
|
2920 (same_at_end + st.st_size - BUF_ZV (buf));
|
|
|
2921 if (overlap > 0)
|
|
|
2922 same_at_end += overlap;
|
|
|
2923
|
|
|
2924 /* Arrange to read only the nonmatching middle part of the file. */
|
|
|
2925 beg = make_int (same_at_start - BUF_BEGV (buf));
|
|
|
2926 end = make_int (st.st_size - (BUF_ZV (buf) - same_at_end));
|
|
|
2927
|
|
|
2928 buffer_delete_range (buf, same_at_start, same_at_end,
|
|
|
2929 !NILP (visit) ? INSDEL_NO_LOCKING : 0);
|
|
|
2930 /* Insert from the file at the proper position. */
|
|
|
2931 BUF_SET_PT (buf, same_at_start);
|
|
|
2932 }
|
|
|
2933 #endif /* FSFMACS_SPEEDY_INSERT */
|
|
|
2934
|
|
|
2935 if (!not_regular)
|
|
|
2936 {
|
|
|
2937 total = XINT (end) - XINT (beg);
|
|
|
2938
|
|
|
2939 /* Make sure point-max won't overflow after this insertion. */
|
|
|
2940 if (total != XINT (make_int (total)))
|
|
|
2941 error ("Maximum buffer size exceeded");
|
|
|
2942 }
|
|
|
2943 else
|
|
|
2944 /* For a special file, all we can do is guess. The value of -1
|
|
|
2945 will make the stream functions read as much as possible. */
|
|
|
2946 total = -1;
|
|
|
2947
|
|
|
2948 if (XINT (beg) != 0
|
|
|
2949 #ifdef FSFMACS_SPEEDY_INSERT
|
|
|
2950 /* why was this here? asked jwz. The reason is that the replace-mode
|
|
|
2951 connivings above will normally put the file pointer other than
|
|
|
2952 where it should be. */
|
|
|
2953 || !NILP (replace)
|
|
|
2954 #endif /* !FSFMACS_SPEEDY_INSERT */
|
|
|
2955 )
|
|
|
2956 {
|
|
|
2957 if (lseek (fd, XINT (beg), 0) < 0)
|
|
|
2958 report_file_error ("Setting file position", list1 (filename));
|
|
|
2959 }
|
|
|
2960
|
|
|
2961 {
|
|
|
2962 Bufpos cur_point = BUF_PT (buf);
|
|
|
2963 struct gcpro ngcpro1;
|
|
|
2964 Lisp_Object stream = make_filedesc_input_stream (fd, 0, total,
|
|
|
2965 LSTR_ALLOW_QUIT);
|
|
|
2966
|
|
|
2967 NGCPRO1 (stream);
|
|
|
2968 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
2969 #ifdef FILE_CODING
|
|
|
2970 stream = make_decoding_input_stream
|
|
|
2971 (XLSTREAM (stream), Fget_coding_system (codesys));
|
|
|
2972 Lstream_set_character_mode (XLSTREAM (stream));
|
|
|
2973 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
2974 #endif /* FILE_CODING */
|
|
|
2975
|
|
|
2976 record_unwind_protect (delete_stream_unwind, stream);
|
|
|
2977
|
|
|
2978 /* No need to limit the amount of stuff we attempt to read. (It would
|
|
|
2979 be incorrect, anyway, when Mule is enabled.) Instead, the limiting
|
|
|
2980 occurs inside of the filedesc stream. */
|
|
|
2981 while (1)
|
|
|
2982 {
|
|
|
2983 ssize_t this_len;
|
|
|
2984 Charcount cc_inserted;
|
|
|
2985
|
|
|
2986 QUIT;
|
|
|
2987 this_len = Lstream_read (XLSTREAM (stream), read_buf,
|
|
|
2988 sizeof (read_buf));
|
|
|
2989
|
|
|
2990 if (this_len <= 0)
|
|
|
2991 {
|
|
|
2992 if (this_len < 0)
|
|
|
2993 saverrno = errno;
|
|
|
2994 break;
|
|
|
2995 }
|
|
|
2996
|
|
|
2997 cc_inserted = buffer_insert_raw_string_1 (buf, cur_point, read_buf,
|
|
|
2998 this_len,
|
|
|
2999 !NILP (visit)
|
|
|
3000 ? INSDEL_NO_LOCKING : 0);
|
|
|
3001 inserted += cc_inserted;
|
|
|
3002 cur_point += cc_inserted;
|
|
|
3003 }
|
|
|
3004 #ifdef FILE_CODING
|
|
|
3005 if (!NILP (used_codesys))
|
|
|
3006 {
|
|
|
3007 Fset (used_codesys,
|
|
|
3008 XCODING_SYSTEM_NAME (decoding_stream_coding_system (XLSTREAM (stream))));
|
|
|
3009 }
|
|
|
3010 #endif /* FILE_CODING */
|
|
|
3011 NUNGCPRO;
|
|
|
3012 }
|
|
|
3013
|
|
|
3014 /* Close the file/stream */
|
|
|
3015 unbind_to (speccount, Qnil);
|
|
|
3016
|
|
|
3017 if (saverrno != 0)
|
|
|
3018 {
|
|
|
3019 error ("IO error reading %s: %s",
|
|
|
3020 XSTRING_DATA (filename), strerror (saverrno));
|
|
|
3021 }
|
|
|
3022
|
|
|
3023 notfound:
|
|
|
3024 handled:
|
|
|
3025
|
|
|
3026 end_multiple_change (buf, mc_count);
|
|
|
3027
|
|
|
3028 if (!NILP (visit))
|
|
|
3029 {
|
|
|
3030 if (!EQ (buf->undo_list, Qt))
|
|
|
3031 buf->undo_list = Qnil;
|
|
|
3032 #ifdef APOLLO
|
|
|
3033 stat ((char *) XSTRING_DATA (filename), &st);
|
|
|
3034 #endif
|
|
|
3035 if (NILP (handler))
|
|
|
3036 {
|
|
|
3037 buf->modtime = st.st_mtime;
|
|
|
3038 buf->filename = filename;
|
|
|
3039 /* XEmacs addition: */
|
|
|
3040 /* This function used to be in C, ostensibly so that
|
|
|
3041 it could be called here. But that's just silly.
|
|
|
3042 There's no reason C code can't call out to Lisp
|
|
|
3043 code, and it's a lot cleaner this way. */
|
|
|
3044 if (!NILP (Ffboundp (Qcompute_buffer_file_truename)))
|
|
|
3045 call1 (Qcompute_buffer_file_truename, make_buffer (buf));
|
|
|
3046 }
|
|
|
3047 BUF_SAVE_MODIFF (buf) = BUF_MODIFF (buf);
|
|
|
3048 buf->auto_save_modified = BUF_MODIFF (buf);
|
|
|
3049 buf->saved_size = make_int (BUF_SIZE (buf));
|
|
|
3050 #ifdef CLASH_DETECTION
|
|
|
3051 if (NILP (handler))
|
|
|
3052 {
|
|
|
3053 if (!NILP (buf->file_truename))
|
|
|
3054 unlock_file (buf->file_truename);
|
|
|
3055 unlock_file (filename);
|
|
|
3056 }
|
|
|
3057 #endif /* CLASH_DETECTION */
|
|
|
3058 if (not_regular)
|
|
|
3059 RETURN_UNGCPRO (Fsignal (Qfile_error,
|
|
|
3060 list2 (build_string ("not a regular file"),
|
|
|
3061 filename)));
|
|
|
3062
|
|
|
3063 /* If visiting nonexistent file, return nil. */
|
|
|
3064 if (buf->modtime == -1)
|
|
|
3065 report_file_error ("Opening input file",
|
|
|
3066 list1 (filename));
|
|
|
3067 }
|
|
|
3068
|
|
|
3069 /* Decode file format */
|
|
|
3070 if (inserted > 0)
|
|
|
3071 {
|
|
|
3072 Lisp_Object insval = call3 (Qformat_decode,
|
|
|
3073 Qnil, make_int (inserted), visit);
|
|
|
3074 CHECK_INT (insval);
|
|
|
3075 inserted = XINT (insval);
|
|
|
3076 }
|
|
|
3077
|
|
|
3078 if (inserted > 0)
|
|
|
3079 {
|
|
|
3080 Lisp_Object p;
|
|
|
3081 struct gcpro ngcpro1;
|
|
|
3082
|
|
|
3083 NGCPRO1 (p);
|
|
|
3084 EXTERNAL_LIST_LOOP (p, Vafter_insert_file_functions)
|
|
|
3085 {
|
|
|
3086 Lisp_Object insval =
|
|
|
3087 call1 (XCAR (p), make_int (inserted));
|
|
|
3088 if (!NILP (insval))
|
|
|
3089 {
|
|
|
3090 CHECK_NATNUM (insval);
|
|
|
3091 inserted = XINT (insval);
|
|
|
3092 }
|
|
|
3093 QUIT;
|
|
|
3094 }
|
|
|
3095 NUNGCPRO;
|
|
|
3096 }
|
|
|
3097
|
|
|
3098 UNGCPRO;
|
|
|
3099
|
|
|
3100 if (!NILP (val))
|
|
|
3101 return (val);
|
|
|
3102 else
|
|
|
3103 return (list2 (filename, make_int (inserted)));
|
|
|
3104 }
|
|
|
3105
|
|
|
3106
|
|
|
3107 static int a_write (Lisp_Object outstream, Lisp_Object instream, int pos,
|
|
|
3108 Lisp_Object *annot);
|
|
|
3109 static Lisp_Object build_annotations (Lisp_Object start, Lisp_Object end);
|
|
|
3110
|
|
|
3111 /* If build_annotations switched buffers, switch back to BUF.
|
|
|
3112 Kill the temporary buffer that was selected in the meantime. */
|
|
|
3113
|
|
|
3114 static Lisp_Object
|
|
|
3115 build_annotations_unwind (Lisp_Object buf)
|
|
|
3116 {
|
|
|
3117 Lisp_Object tembuf;
|
|
|
3118
|
|
|
3119 if (XBUFFER (buf) == current_buffer)
|
|
|
3120 return Qnil;
|
|
|
3121 tembuf = Fcurrent_buffer ();
|
|
|
3122 Fset_buffer (buf);
|
|
|
3123 Fkill_buffer (tembuf);
|
|
|
3124 return Qnil;
|
|
|
3125 }
|
|
|
3126
|
|
|
3127 DEFUN ("write-region-internal", Fwrite_region_internal, 3, 7,
|
|
|
3128 "r\nFWrite region to file: ", /*
|
|
|
3129 Write current region into specified file; no coding-system frobbing.
|
|
|
3130 This function is identical to `write-region' except for the handling
|
|
|
3131 of the CODESYS argument under XEmacs/Mule. (When Mule support is not
|
|
|
3132 present, both functions are identical and ignore the CODESYS argument.)
|
|
|
3133 If support for Mule exists in this Emacs, the file is encoded according
|
|
|
3134 to the value of CODESYS. If this is nil, no code conversion occurs.
|
|
|
3135 */
|
|
|
3136 (start, end, filename, append, visit, lockname, codesys))
|
|
|
3137 {
|
|
|
3138 /* This function can call lisp */
|
|
|
3139 int desc;
|
|
|
3140 int failure;
|
|
|
3141 int save_errno = 0;
|
|
|
3142 struct stat st;
|
|
|
3143 Lisp_Object fn;
|
|
|
3144 int speccount = specpdl_depth ();
|
|
|
3145 int visiting_other = STRINGP (visit);
|
|
|
3146 int visiting = (EQ (visit, Qt) || visiting_other);
|
|
|
3147 int quietly = (!visiting && !NILP (visit));
|
|
|
3148 Lisp_Object visit_file = Qnil;
|
|
|
3149 Lisp_Object annotations = Qnil;
|
|
|
3150 struct buffer *given_buffer;
|
|
|
3151 Bufpos start1, end1;
|
|
|
3152
|
|
|
3153 /* #### dmoore - if Fexpand_file_name or handlers kill the buffer,
|
|
|
3154 we should signal an error rather than blissfully continuing
|
|
|
3155 along. ARGH, this function is going to lose lose lose. We need
|
|
|
3156 to protect the current_buffer from being destroyed, but the
|
|
|
3157 multiple return points make this a pain in the butt. */
|
|
|
3158
|
|
|
3159 #ifdef FILE_CODING
|
|
|
3160 codesys = Fget_coding_system (codesys);
|
|
|
3161 #endif /* FILE_CODING */
|
|
|
3162
|
|
|
3163 if (current_buffer->base_buffer && ! NILP (visit))
|
|
|
3164 error ("Cannot do file visiting in an indirect buffer");
|
|
|
3165
|
|
|
3166 if (!NILP (start) && !STRINGP (start))
|
|
|
3167 get_buffer_range_char (current_buffer, start, end, &start1, &end1, 0);
|
|
|
3168
|
|
|
3169 {
|
|
|
3170 Lisp_Object handler;
|
|
|
3171 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
3172
|
|
|
3173 GCPRO5 (start, filename, visit, visit_file, lockname);
|
|
|
3174
|
|
|
3175 if (visiting_other)
|
|
|
3176 visit_file = Fexpand_file_name (visit, Qnil);
|
|
|
3177 else
|
|
|
3178 visit_file = filename;
|
|
|
3179 filename = Fexpand_file_name (filename, Qnil);
|
|
|
3180
|
|
|
3181 UNGCPRO;
|
|
|
3182
|
|
|
3183 if (NILP (lockname))
|
|
|
3184 lockname = visit_file;
|
|
|
3185
|
|
|
3186 /* If the file name has special constructs in it,
|
|
|
3187 call the corresponding file handler. */
|
|
|
3188 handler = Ffind_file_name_handler (filename, Qwrite_region);
|
|
|
3189 /* If FILENAME has no handler, see if VISIT has one. */
|
|
|
3190 if (NILP (handler) && STRINGP (visit))
|
|
|
3191 handler = Ffind_file_name_handler (visit, Qwrite_region);
|
|
|
3192
|
|
|
3193 if (!NILP (handler))
|
|
|
3194 {
|
|
|
3195 Lisp_Object val = call8 (handler, Qwrite_region, start, end,
|
|
|
3196 filename, append, visit, lockname, codesys);
|
|
|
3197 if (visiting)
|
|
|
3198 {
|
|
|
3199 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer);
|
|
|
3200 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer));
|
|
|
3201 current_buffer->filename = visit_file;
|
|
|
3202 MARK_MODELINE_CHANGED;
|
|
|
3203 }
|
|
|
3204 return val;
|
|
|
3205 }
|
|
|
3206 }
|
|
|
3207
|
|
|
3208 #ifdef CLASH_DETECTION
|
|
|
3209 if (!auto_saving)
|
|
|
3210 {
|
|
|
3211 Lisp_Object curbuf;
|
|
|
3212 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
3213
|
|
|
3214 XSETBUFFER (curbuf, current_buffer);
|
|
|
3215 GCPRO5 (start, filename, visit_file, lockname, curbuf);
|
|
|
3216 lock_file (lockname);
|
|
|
3217 UNGCPRO;
|
|
|
3218 }
|
|
|
3219 #endif /* CLASH_DETECTION */
|
|
|
3220
|
|
|
3221 /* Special kludge to simplify auto-saving. */
|
|
|
3222 if (NILP (start))
|
|
|
3223 {
|
|
|
3224 start1 = BUF_BEG (current_buffer);
|
|
|
3225 end1 = BUF_Z (current_buffer);
|
|
|
3226 }
|
|
|
3227
|
|
|
3228 record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ());
|
|
|
3229
|
|
|
3230 given_buffer = current_buffer;
|
|
|
3231 annotations = build_annotations (start, end);
|
|
|
3232 if (current_buffer != given_buffer)
|
|
|
3233 {
|
|
|
3234 start1 = BUF_BEGV (current_buffer);
|
|
|
3235 end1 = BUF_ZV (current_buffer);
|
|
|
3236 }
|
|
|
3237
|
|
|
3238 fn = filename;
|
|
|
3239 desc = -1;
|
|
|
3240 if (!NILP (append))
|
|
|
3241 {
|
|
|
3242 desc = open ((char *) XSTRING_DATA (fn), O_WRONLY | OPEN_BINARY, 0);
|
|
|
3243 }
|
|
|
3244 if (desc < 0)
|
|
|
3245 {
|
|
|
3246 desc = open ((char *) XSTRING_DATA (fn),
|
|
|
3247 (O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY),
|
|
|
3248 ((auto_saving) ? auto_save_mode_bits : CREAT_MODE));
|
|
|
3249 }
|
|
|
3250
|
|
|
3251 if (desc < 0)
|
|
|
3252 {
|
|
|
3253 #ifdef CLASH_DETECTION
|
|
|
3254 save_errno = errno;
|
|
|
3255 if (!auto_saving) unlock_file (lockname);
|
|
|
3256 errno = save_errno;
|
|
|
3257 #endif /* CLASH_DETECTION */
|
|
|
3258 report_file_error ("Opening output file", list1 (filename));
|
|
|
3259 }
|
|
|
3260
|
|
|
3261 {
|
|
|
3262 Lisp_Object desc_locative = Fcons (make_int (desc), Qnil);
|
|
|
3263 Lisp_Object instream = Qnil, outstream = Qnil;
|
|
|
3264 struct gcpro gcpro1, gcpro2;
|
|
|
3265 /* need to gcpro; QUIT could happen out of call to write() */
|
|
|
3266 GCPRO2 (instream, outstream);
|
|
|
3267
|
|
|
3268 record_unwind_protect (close_file_unwind, desc_locative);
|
|
|
3269
|
|
|
3270 if (!NILP (append))
|
|
|
3271 {
|
|
|
3272 if (lseek (desc, 0, 2) < 0)
|
|
|
3273 {
|
|
|
3274 #ifdef CLASH_DETECTION
|
|
|
3275 if (!auto_saving) unlock_file (lockname);
|
|
|
3276 #endif /* CLASH_DETECTION */
|
|
|
3277 report_file_error ("Lseek error",
|
|
|
3278 list1 (filename));
|
|
|
3279 }
|
|
|
3280 }
|
|
|
3281
|
|
|
3282 failure = 0;
|
|
|
3283
|
|
|
3284 /* Note: I tried increasing the buffering size, along with
|
|
|
3285 various other tricks, but nothing seemed to make much of
|
|
|
3286 a difference in the time it took to save a large file.
|
|
|
3287 (Actually that's not true. With a local disk, changing
|
|
|
3288 the buffer size doesn't seem to make much difference.
|
|
|
3289 With an NFS-mounted disk, it could make a lot of difference
|
|
|
3290 because you're affecting the number of network requests
|
|
|
3291 that need to be made, and there could be a large latency
|
|
|
3292 for each request. So I've increased the buffer size
|
|
|
3293 to 64K.) */
|
|
|
3294 outstream = make_filedesc_output_stream (desc, 0, -1, 0);
|
|
|
3295 Lstream_set_buffering (XLSTREAM (outstream),
|
|
|
3296 LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
3297 #ifdef FILE_CODING
|
|
|
3298 outstream =
|
|
|
3299 make_encoding_output_stream (XLSTREAM (outstream), codesys);
|
|
|
3300 Lstream_set_buffering (XLSTREAM (outstream),
|
|
|
3301 LSTREAM_BLOCKN_BUFFERED, 65536);
|
|
|
3302 #endif /* FILE_CODING */
|
|
|
3303 if (STRINGP (start))
|
|
|
3304 {
|
|
|
3305 instream = make_lisp_string_input_stream (start, 0, -1);
|
|
|
3306 start1 = 0;
|
|
|
3307 }
|
|
|
3308 else
|
|
|
3309 instream = make_lisp_buffer_input_stream (current_buffer, start1, end1,
|
|
|
3310 LSTR_SELECTIVE |
|
|
|
3311 LSTR_IGNORE_ACCESSIBLE);
|
|
|
3312 failure = (0 > (a_write (outstream, instream, start1,
|
|
|
3313 &annotations)));
|
|
|
3314 save_errno = errno;
|
|
|
3315 /* Note that this doesn't close the desc since we created the
|
|
|
3316 stream without the LSTR_CLOSING flag, but it does
|
|
|
3317 flush out any buffered data. */
|
|
|
3318 if (Lstream_close (XLSTREAM (outstream)) < 0)
|
|
|
3319 {
|
|
|
3320 failure = 1;
|
|
|
3321 save_errno = errno;
|
|
|
3322 }
|
|
|
3323 Lstream_close (XLSTREAM (instream));
|
|
|
3324 UNGCPRO;
|
|
|
3325
|
|
|
3326 #ifdef HAVE_FSYNC
|
|
|
3327 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
|
|
|
3328 Disk full in NFS may be reported here. */
|
|
|
3329 /* mib says that closing the file will try to write as fast as NFS can do
|
|
|
3330 it, and that means the fsync here is not crucial for autosave files. */
|
|
|
3331 if (!auto_saving && fsync (desc) < 0
|
|
|
3332 /* If fsync fails with EINTR, don't treat that as serious. */
|
|
|
3333 && errno != EINTR)
|
|
|
3334 {
|
|
|
3335 failure = 1;
|
|
|
3336 save_errno = errno;
|
|
|
3337 }
|
|
|
3338 #endif /* HAVE_FSYNC */
|
|
|
3339
|
|
|
3340 /* Spurious "file has changed on disk" warnings have been
|
|
|
3341 observed on Suns as well.
|
|
|
3342 It seems that `close' can change the modtime, under nfs.
|
|
|
3343
|
|
|
3344 (This has supposedly been fixed in Sunos 4,
|
|
|
3345 but who knows about all the other machines with NFS?) */
|
|
|
3346 /* On VMS and APOLLO, must do the stat after the close
|
|
|
3347 since closing changes the modtime. */
|
|
|
3348 /* As it does on Windows too - kkm */
|
|
|
3349 /* The spurious warnings appear on Linux too. Rather than handling
|
|
|
3350 this on a per-system basis, unconditionally do the stat after the close - cgw */
|
|
|
3351
|
|
|
3352 #if 0 /* !defined (WINDOWSNT) */ /* !defined (VMS) && !defined (APOLLO) */
|
|
|
3353 fstat (desc, &st);
|
|
|
3354 #endif
|
|
|
3355
|
|
|
3356 /* NFS can report a write failure now. */
|
|
|
3357 if (close (desc) < 0)
|
|
|
3358 {
|
|
|
3359 failure = 1;
|
|
|
3360 save_errno = errno;
|
|
|
3361 }
|
|
|
3362
|
|
|
3363 /* Discard the close unwind-protect. Execute the one for
|
|
|
3364 build_annotations (switches back to the original current buffer
|
|
|
3365 as necessary). */
|
|
|
3366 XCAR (desc_locative) = Qnil;
|
|
|
3367 unbind_to (speccount, Qnil);
|
|
|
3368 }
|
|
|
3369
|
|
|
3370 /* # if defined (WINDOWSNT) */ /* defined (VMS) || defined (APOLLO) */
|
|
|
3371 stat ((char *) XSTRING_DATA (fn), &st);
|
|
|
3372 /* #endif */
|
|
|
3373
|
|
|
3374 #ifdef CLASH_DETECTION
|
|
|
3375 if (!auto_saving)
|
|
|
3376 unlock_file (lockname);
|
|
|
3377 #endif /* CLASH_DETECTION */
|
|
|
3378
|
|
|
3379 /* Do this before reporting IO error
|
|
|
3380 to avoid a "file has changed on disk" warning on
|
|
|
3381 next attempt to save. */
|
|
|
3382 if (visiting)
|
|
|
3383 current_buffer->modtime = st.st_mtime;
|
|
|
3384
|
|
|
3385 if (failure)
|
|
|
3386 error ("IO error writing %s: %s",
|
|
|
3387 XSTRING_DATA (fn),
|
|
|
3388 strerror (save_errno));
|
|
|
3389
|
|
|
3390 if (visiting)
|
|
|
3391 {
|
|
|
3392 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer);
|
|
|
3393 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer));
|
|
|
3394 current_buffer->filename = visit_file;
|
|
|
3395 MARK_MODELINE_CHANGED;
|
|
|
3396 }
|
|
|
3397 else if (quietly)
|
|
|
3398 {
|
|
|
3399 return Qnil;
|
|
|
3400 }
|
|
|
3401
|
|
|
3402 if (!auto_saving)
|
|
|
3403 {
|
|
|
3404 if (visiting_other)
|
|
|
3405 message ("Wrote %s", XSTRING_DATA (visit_file));
|
|
|
3406 else
|
|
|
3407 {
|
|
|
3408 struct gcpro gcpro1;
|
|
|
3409 Lisp_Object fsp;
|
|
|
3410 GCPRO1 (fn);
|
|
|
3411
|
|
|
3412 fsp = Ffile_symlink_p (fn);
|
|
|
3413 if (NILP (fsp))
|
|
|
3414 message ("Wrote %s", XSTRING_DATA (fn));
|
|
|
3415 else
|
|
|
3416 message ("Wrote %s (symlink to %s)",
|
|
|
3417 XSTRING_DATA (fn), XSTRING_DATA (fsp));
|
|
|
3418 UNGCPRO;
|
|
|
3419 }
|
|
|
3420 }
|
|
|
3421 return Qnil;
|
|
|
3422 }
|
|
|
3423
|
|
|
3424 /* #### This is such a load of shit!!!! There is no way we should define
|
|
|
3425 something so stupid as a subr, just sort the fucking list more
|
|
|
3426 intelligently. */
|
|
|
3427 DEFUN ("car-less-than-car", Fcar_less_than_car, 2, 2, 0, /*
|
|
|
3428 Return t if (car A) is numerically less than (car B).
|
|
|
3429 */
|
|
|
3430 (a, b))
|
|
|
3431 {
|
|
|
3432 Lisp_Object objs[2];
|
|
|
3433 objs[0] = Fcar (a);
|
|
|
3434 objs[1] = Fcar (b);
|
|
|
3435 return Flss (2, objs);
|
|
|
3436 }
|
|
|
3437
|
|
|
3438 /* Heh heh heh, let's define this too, just to aggravate the person who
|
|
|
3439 wrote the above comment. */
|
|
|
3440 DEFUN ("cdr-less-than-cdr", Fcdr_less_than_cdr, 2, 2, 0, /*
|
|
|
3441 Return t if (cdr A) is numerically less than (cdr B).
|
|
|
3442 */
|
|
|
3443 (a, b))
|
|
|
3444 {
|
|
|
3445 Lisp_Object objs[2];
|
|
|
3446 objs[0] = Fcdr (a);
|
|
|
3447 objs[1] = Fcdr (b);
|
|
|
3448 return Flss (2, objs);
|
|
|
3449 }
|
|
|
3450
|
|
|
3451 /* Build the complete list of annotations appropriate for writing out
|
|
|
3452 the text between START and END, by calling all the functions in
|
|
|
3453 write-region-annotate-functions and merging the lists they return.
|
|
|
3454 If one of these functions switches to a different buffer, we assume
|
|
|
3455 that buffer contains altered text. Therefore, the caller must
|
|
|
3456 make sure to restore the current buffer in all cases,
|
|
|
3457 as save-excursion would do. */
|
|
|
3458
|
|
|
3459 static Lisp_Object
|
|
|
3460 build_annotations (Lisp_Object start, Lisp_Object end)
|
|
|
3461 {
|
|
|
3462 /* This function can GC */
|
|
|
3463 Lisp_Object annotations;
|
|
|
3464 Lisp_Object p, res;
|
|
|
3465 struct gcpro gcpro1, gcpro2;
|
|
|
3466 Lisp_Object original_buffer;
|
|
|
3467
|
|
|
3468 XSETBUFFER (original_buffer, current_buffer);
|
|
|
3469
|
|
|
3470 annotations = Qnil;
|
|
|
3471 p = Vwrite_region_annotate_functions;
|
|
|
3472 GCPRO2 (annotations, p);
|
|
|
3473 while (!NILP (p))
|
|
|
3474 {
|
|
|
3475 struct buffer *given_buffer = current_buffer;
|
|
|
3476 Vwrite_region_annotations_so_far = annotations;
|
|
|
3477 res = call2 (Fcar (p), start, end);
|
|
|
3478 /* If the function makes a different buffer current,
|
|
|
3479 assume that means this buffer contains altered text to be output.
|
|
|
3480 Reset START and END from the buffer bounds
|
|
|
3481 and discard all previous annotations because they should have
|
|
|
3482 been dealt with by this function. */
|
|
|
3483 if (current_buffer != given_buffer)
|
|
|
3484 {
|
|
|
3485 start = make_int (BUF_BEGV (current_buffer));
|
|
|
3486 end = make_int (BUF_ZV (current_buffer));
|
|
|
3487 annotations = Qnil;
|
|
|
3488 }
|
|
|
3489 Flength (res); /* Check basic validity of return value */
|
|
|
3490 annotations = merge (annotations, res, Qcar_less_than_car);
|
|
|
3491 p = Fcdr (p);
|
|
|
3492 }
|
|
|
3493
|
|
|
3494 /* Now do the same for annotation functions implied by the file-format */
|
|
|
3495 if (auto_saving && (!EQ (Vauto_save_file_format, Qt)))
|
|
|
3496 p = Vauto_save_file_format;
|
|
|
3497 else
|
|
|
3498 p = current_buffer->file_format;
|
|
|
3499 while (!NILP (p))
|
|
|
3500 {
|
|
|
3501 struct buffer *given_buffer = current_buffer;
|
|
|
3502 Vwrite_region_annotations_so_far = annotations;
|
|
|
3503 res = call4 (Qformat_annotate_function, Fcar (p), start, end,
|
|
|
3504 original_buffer);
|
|
|
3505 if (current_buffer != given_buffer)
|
|
|
3506 {
|
|
|
3507 start = make_int (BUF_BEGV (current_buffer));
|
|
|
3508 end = make_int (BUF_ZV (current_buffer));
|
|
|
3509 annotations = Qnil;
|
|
|
3510 }
|
|
|
3511 Flength (res);
|
|
|
3512 annotations = merge (annotations, res, Qcar_less_than_car);
|
|
|
3513 p = Fcdr (p);
|
|
|
3514 }
|
|
|
3515 UNGCPRO;
|
|
|
3516 return annotations;
|
|
|
3517 }
|
|
|
3518
|
|
|
3519 /* Write to stream OUTSTREAM the characters from INSTREAM (it is read until
|
|
|
3520 EOF is encountered), assuming they start at position POS in the buffer
|
|
|
3521 of string that STREAM refers to. Intersperse with them the annotations
|
|
|
3522 from *ANNOT that fall into the range of positions we are reading from,
|
|
|
3523 each at its appropriate position.
|
|
|
3524
|
|
|
3525 Modify *ANNOT by discarding elements as we output them.
|
|
|
3526 The return value is negative in case of system call failure. */
|
|
|
3527
|
|
|
3528 /* 4K should probably be fine. We just need to reduce the number of
|
|
|
3529 function calls to reasonable level. The Lstream stuff itself will
|
|
|
3530 batch to 64K to reduce the number of system calls. */
|
|
|
3531
|
|
|
3532 #define A_WRITE_BATCH_SIZE 4096
|
|
|
3533
|
|
|
3534 static int
|
|
|
3535 a_write (Lisp_Object outstream, Lisp_Object instream, int pos,
|
|
|
3536 Lisp_Object *annot)
|
|
|
3537 {
|
|
|
3538 Lisp_Object tem;
|
|
|
3539 int nextpos;
|
|
|
3540 unsigned char largebuf[A_WRITE_BATCH_SIZE];
|
|
|
3541 Lstream *instr = XLSTREAM (instream);
|
|
|
3542 Lstream *outstr = XLSTREAM (outstream);
|
|
|
3543
|
|
|
3544 while (LISTP (*annot))
|
|
|
3545 {
|
|
|
3546 tem = Fcar_safe (Fcar (*annot));
|
|
|
3547 if (INTP (tem))
|
|
|
3548 nextpos = XINT (tem);
|
|
|
3549 else
|
|
|
3550 nextpos = INT_MAX;
|
|
|
3551 #ifdef MULE
|
|
|
3552 /* If there are annotations left and we have Mule, then we
|
|
|
3553 have to do the I/O one emchar at a time so we can
|
|
|
3554 determine when to insert the annotation. */
|
|
|
3555 if (!NILP (*annot))
|
|
|
3556 {
|
|
|
3557 Emchar ch;
|
|
|
3558 while (pos != nextpos && (ch = Lstream_get_emchar (instr)) != EOF)
|
|
|
3559 {
|
|
|
3560 if (Lstream_put_emchar (outstr, ch) < 0)
|
|
|
3561 return -1;
|
|
|
3562 pos++;
|
|
|
3563 }
|
|
|
3564 }
|
|
|
3565 else
|
|
|
3566 #endif /* MULE */
|
|
|
3567 {
|
|
|
3568 while (pos != nextpos)
|
|
|
3569 {
|
|
|
3570 /* Otherwise there is no point to that. Just go in batches. */
|
|
|
3571 int chunk = min (nextpos - pos, A_WRITE_BATCH_SIZE);
|
|
|
3572
|
|
|
3573 chunk = Lstream_read (instr, largebuf, chunk);
|
|
|
3574 if (chunk < 0)
|
|
|
3575 return -1;
|
|
|
3576 if (chunk == 0) /* EOF */
|
|
|
3577 break;
|
|
|
3578 if (Lstream_write (outstr, largebuf, chunk) < chunk)
|
|
|
3579 return -1;
|
|
|
3580 pos += chunk;
|
|
|
3581 }
|
|
|
3582 }
|
|
|
3583 if (pos == nextpos)
|
|
|
3584 {
|
|
|
3585 tem = Fcdr (Fcar (*annot));
|
|
|
3586 if (STRINGP (tem))
|
|
|
3587 {
|
|
|
3588 if (Lstream_write (outstr, XSTRING_DATA (tem),
|
|
|
3589 XSTRING_LENGTH (tem)) < 0)
|
|
|
3590 return -1;
|
|
|
3591 }
|
|
|
3592 *annot = Fcdr (*annot);
|
|
|
3593 }
|
|
|
3594 else
|
|
|
3595 return 0;
|
|
|
3596 }
|
|
|
3597 return -1;
|
|
|
3598 }
|
|
|
3599
|
|
|
3600
|
|
|
3601
|
|
|
3602 #if 0
|
|
|
3603 #include <des_crypt.h>
|
|
|
3604
|
|
|
3605 #define CRYPT_BLOCK_SIZE 8 /* bytes */
|
|
|
3606 #define CRYPT_KEY_SIZE 8 /* bytes */
|
|
|
3607
|
|
|
3608 DEFUN ("encrypt-string", Fencrypt_string, 2, 2, 0, /*
|
|
|
3609 Encrypt STRING using KEY.
|
|
|
3610 */
|
|
|
3611 (string, key))
|
|
|
3612 {
|
|
|
3613 char *encrypted_string, *raw_key;
|
|
|
3614 int rounded_size, extra, key_size;
|
|
|
3615
|
|
|
3616 /* !!#### May produce bogus data under Mule. */
|
|
|
3617 CHECK_STRING (string);
|
|
|
3618 CHECK_STRING (key);
|
|
|
3619
|
|
|
3620 extra = XSTRING_LENGTH (string) % CRYPT_BLOCK_SIZE;
|
|
|
3621 rounded_size = XSTRING_LENGTH (string) + extra;
|
|
|
3622 encrypted_string = alloca (rounded_size + 1);
|
|
|
3623 memcpy (encrypted_string, XSTRING_DATA (string), XSTRING_LENGTH (string));
|
|
|
3624 memset (encrypted_string + rounded_size - extra, 0, extra + 1);
|
|
|
3625
|
|
|
3626 key_size = min (CRYPT_KEY_SIZE, XSTRING_LENGTH (key))
|
|
|
3627
|
|
|
3628 raw_key = alloca (CRYPT_KEY_SIZE + 1);
|
|
|
3629 memcpy (raw_key, XSTRING_DATA (key), key_size);
|
|
|
3630 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size);
|
|
|
3631
|
|
|
3632 ecb_crypt (raw_key, encrypted_string, rounded_size,
|
|
|
3633 DES_ENCRYPT | DES_SW);
|
|
|
3634 return make_string (encrypted_string, rounded_size);
|
|
|
3635 }
|
|
|
3636
|
|
|
3637 DEFUN ("decrypt-string", Fdecrypt_string, 2, 2, 0, /*
|
|
|
3638 Decrypt STRING using KEY.
|
|
|
3639 */
|
|
|
3640 (string, key))
|
|
|
3641 {
|
|
|
3642 char *decrypted_string, *raw_key;
|
|
|
3643 int string_size, key_size;
|
|
|
3644
|
|
|
3645 CHECK_STRING (string);
|
|
|
3646 CHECK_STRING (key);
|
|
|
3647
|
|
|
3648 string_size = XSTRING_LENGTH (string) + 1;
|
|
|
3649 decrypted_string = alloca (string_size);
|
|
|
3650 memcpy (decrypted_string, XSTRING_DATA (string), string_size);
|
|
|
3651 decrypted_string[string_size - 1] = '\0';
|
|
|
3652
|
|
|
3653 key_size = min (CRYPT_KEY_SIZE, XSTRING_LENGTH (key))
|
|
|
3654
|
|
|
3655 raw_key = alloca (CRYPT_KEY_SIZE + 1);
|
|
|
3656 memcpy (raw_key, XSTRING_DATA (key), key_size);
|
|
|
3657 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size);
|
|
|
3658
|
|
|
3659
|
|
|
3660 ecb_crypt (raw_key, decrypted_string, string_size, D | DES_SW);
|
|
|
3661 return make_string (decrypted_string, string_size - 1);
|
|
|
3662 }
|
|
|
3663 #endif /* 0 */
|
|
|
3664
|
|
|
3665
|
|
|
3666 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, 1, 1, 0, /*
|
|
|
3667 Return t if last mod time of BUF's visited file matches what BUF records.
|
|
|
3668 This means that the file has not been changed since it was visited or saved.
|
|
|
3669 */
|
|
|
3670 (buf))
|
|
|
3671 {
|
|
|
3672 /* This function can call lisp */
|
|
|
3673 struct buffer *b;
|
|
|
3674 struct stat st;
|
|
|
3675 Lisp_Object handler;
|
|
|
3676
|
|
|
3677 CHECK_BUFFER (buf);
|
|
|
3678 b = XBUFFER (buf);
|
|
|
3679
|
|
|
3680 if (!STRINGP (b->filename)) return Qt;
|
|
|
3681 if (b->modtime == 0) return Qt;
|
|
|
3682
|
|
|
3683 /* If the file name has special constructs in it,
|
|
|
3684 call the corresponding file handler. */
|
|
|
3685 handler = Ffind_file_name_handler (b->filename,
|
|
|
3686 Qverify_visited_file_modtime);
|
|
|
3687 if (!NILP (handler))
|
|
|
3688 return call2 (handler, Qverify_visited_file_modtime, buf);
|
|
|
3689
|
|
|
3690 if (stat ((char *) XSTRING_DATA (b->filename), &st) < 0)
|
|
|
3691 {
|
|
|
3692 /* If the file doesn't exist now and didn't exist before,
|
|
|
3693 we say that it isn't modified, provided the error is a tame one. */
|
|
|
3694 if (errno == ENOENT || errno == EACCES || errno == ENOTDIR)
|
|
|
3695 st.st_mtime = -1;
|
|
|
3696 else
|
|
|
3697 st.st_mtime = 0;
|
|
|
3698 }
|
|
|
3699 if (st.st_mtime == b->modtime
|
|
|
3700 /* If both are positive, accept them if they are off by one second. */
|
|
|
3701 || (st.st_mtime > 0 && b->modtime > 0
|
|
|
3702 && (st.st_mtime == b->modtime + 1
|
|
|
3703 || st.st_mtime == b->modtime - 1)))
|
|
|
3704 return Qt;
|
|
|
3705 return Qnil;
|
|
|
3706 }
|
|
|
3707
|
|
|
3708 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, 0, 0, 0, /*
|
|
|
3709 Clear out records of last mod time of visited file.
|
|
|
3710 Next attempt to save will certainly not complain of a discrepancy.
|
|
|
3711 */
|
|
|
3712 ())
|
|
|
3713 {
|
|
|
3714 current_buffer->modtime = 0;
|
|
|
3715 return Qnil;
|
|
|
3716 }
|
|
|
3717
|
|
|
3718 DEFUN ("visited-file-modtime", Fvisited_file_modtime, 0, 0, 0, /*
|
|
|
3719 Return the current buffer's recorded visited file modification time.
|
|
|
3720 The value is a list of the form (HIGH . LOW), like the time values
|
|
|
3721 that `file-attributes' returns.
|
|
|
3722 */
|
|
|
3723 ())
|
|
|
3724 {
|
|
|
3725 return time_to_lisp ((time_t) current_buffer->modtime);
|
|
|
3726 }
|
|
|
3727
|
|
|
3728 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, 0, 1, 0, /*
|
|
|
3729 Update buffer's recorded modification time from the visited file's time.
|
|
|
3730 Useful if the buffer was not read from the file normally
|
|
|
3731 or if the file itself has been changed for some known benign reason.
|
|
|
3732 An argument specifies the modification time value to use
|
|
|
3733 \(instead of that of the visited file), in the form of a list
|
|
|
3734 \(HIGH . LOW) or (HIGH LOW).
|
|
|
3735 */
|
|
|
3736 (time_list))
|
|
|
3737 {
|
|
|
3738 /* This function can call lisp */
|
|
|
3739 if (!NILP (time_list))
|
|
|
3740 {
|
|
|
3741 time_t the_time;
|
|
|
3742 lisp_to_time (time_list, &the_time);
|
|
|
3743 current_buffer->modtime = (int) the_time;
|
|
|
3744 }
|
|
|
3745 else
|
|
|
3746 {
|
|
|
3747 Lisp_Object filename;
|
|
|
3748 struct stat st;
|
|
|
3749 Lisp_Object handler;
|
|
|
3750 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3751
|
|
|
3752 GCPRO3 (filename, time_list, current_buffer->filename);
|
|
|
3753 filename = Fexpand_file_name (current_buffer->filename, Qnil);
|
|
|
3754
|
|
|
3755 /* If the file name has special constructs in it,
|
|
|
3756 call the corresponding file handler. */
|
|
|
3757 handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime);
|
|
|
3758 UNGCPRO;
|
|
|
3759 if (!NILP (handler))
|
|
|
3760 /* The handler can find the file name the same way we did. */
|
|
|
3761 return call2 (handler, Qset_visited_file_modtime, Qnil);
|
|
|
3762 else if (stat ((char *) XSTRING_DATA (filename), &st) >= 0)
|
|
|
3763 current_buffer->modtime = st.st_mtime;
|
|
|
3764 }
|
|
|
3765
|
|
|
3766 return Qnil;
|
|
|
3767 }
|
|
|
3768
|
|
|
3769 static Lisp_Object
|
|
|
3770 auto_save_error (Lisp_Object condition_object, Lisp_Object ignored)
|
|
|
3771 {
|
|
|
3772 /* This function can call lisp */
|
|
|
3773 if (gc_in_progress)
|
|
|
3774 return Qnil;
|
|
|
3775 /* Don't try printing an error message after everything is gone! */
|
|
|
3776 if (preparing_for_armageddon)
|
|
|
3777 return Qnil;
|
|
|
3778 clear_echo_area (selected_frame (), Qauto_saving, 1);
|
|
|
3779 Fding (Qt, Qauto_save_error, Qnil);
|
|
|
3780 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name));
|
|
|
3781 Fsleep_for (make_int (1));
|
|
|
3782 message ("Auto-saving...error!for %s", XSTRING_DATA (current_buffer->name));
|
|
|
3783 Fsleep_for (make_int (1));
|
|
|
3784 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name));
|
|
|
3785 Fsleep_for (make_int (1));
|
|
|
3786 return Qnil;
|
|
|
3787 }
|
|
|
3788
|
|
|
3789 static Lisp_Object
|
|
|
3790 auto_save_1 (Lisp_Object ignored)
|
|
|
3791 {
|
|
|
3792 /* This function can call lisp */
|
|
|
3793 /* #### I think caller is protecting current_buffer? */
|
|
|
3794 struct stat st;
|
|
|
3795 Lisp_Object fn = current_buffer->filename;
|
|
|
3796 Lisp_Object a = current_buffer->auto_save_file_name;
|
|
|
3797
|
|
|
3798 if (!STRINGP (a))
|
|
|
3799 return (Qnil);
|
|
|
3800
|
|
|
3801 /* Get visited file's mode to become the auto save file's mode. */
|
|
|
3802 if (STRINGP (fn) &&
|
|
|
3803 stat ((char *) XSTRING_DATA (fn), &st) >= 0)
|
|
|
3804 /* But make sure we can overwrite it later! */
|
|
|
3805 auto_save_mode_bits = st.st_mode | 0600;
|
|
|
3806 else
|
|
|
3807 /* default mode for auto-save files of buffers with no file is
|
|
|
3808 readable by owner only. This may annoy some small number of
|
|
|
3809 people, but the alternative removes all privacy from email. */
|
|
|
3810 auto_save_mode_bits = 0600;
|
|
|
3811
|
|
|
3812 return
|
|
|
3813 /* !!#### need to deal with this 'escape-quoted everywhere */
|
|
|
3814 Fwrite_region_internal (Qnil, Qnil, a, Qnil, Qlambda, Qnil,
|
|
|
3815 #ifdef MULE
|
|
|
3816 Qescape_quoted
|
|
|
3817 #else
|
|
|
3818 Qnil
|
|
|
3819 #endif
|
|
|
3820 );
|
|
|
3821 }
|
|
|
3822
|
|
|
3823 static Lisp_Object
|
|
|
3824 auto_save_expand_name_error (Lisp_Object condition_object, Lisp_Object ignored)
|
|
|
3825 {
|
|
|
3826 /* #### this function should spew an error message about not being
|
|
|
3827 able to open the .saves file. */
|
|
|
3828 return Qnil;
|
|
|
3829 }
|
|
|
3830
|
|
|
3831 static Lisp_Object
|
|
|
3832 auto_save_expand_name (Lisp_Object name)
|
|
|
3833 {
|
|
|
3834 struct gcpro gcpro1;
|
|
|
3835
|
|
|
3836 /* note that caller did NOT gc protect name, so we do it. */
|
|
|
3837 /* #### dmoore - this might not be necessary, if condition_case_1
|
|
|
3838 protects it. but I don't think it does. */
|
|
|
3839 GCPRO1 (name);
|
|
|
3840 RETURN_UNGCPRO (Fexpand_file_name (name, Qnil));
|
|
|
3841 }
|
|
|
3842
|
|
|
3843
|
|
|
3844 static Lisp_Object
|
|
|
3845 do_auto_save_unwind (Lisp_Object fd)
|
|
|
3846 {
|
|
|
3847 close (XINT (fd));
|
|
|
3848 return (fd);
|
|
|
3849 }
|
|
|
3850
|
|
|
3851 static Lisp_Object
|
|
|
3852 do_auto_save_unwind_2 (Lisp_Object old_auto_saving)
|
|
|
3853 {
|
|
|
3854 auto_saving = XINT (old_auto_saving);
|
|
|
3855 return Qnil;
|
|
|
3856 }
|
|
|
3857
|
|
|
3858 /* Fdo_auto_save() checks whether a GC is in progress when it is called,
|
|
|
3859 and if so, tries to avoid touching lisp objects.
|
|
|
3860
|
|
|
3861 The only time that Fdo_auto_save() is called while GC is in progress
|
|
|
3862 is if we're going down, as a result of an abort() or a kill signal.
|
|
|
3863 It's fairly important that we generate autosave files in that case!
|
|
|
3864 */
|
|
|
3865
|
|
|
3866 DEFUN ("do-auto-save", Fdo_auto_save, 0, 2, "", /*
|
|
|
3867 Auto-save all buffers that need it.
|
|
|
3868 This is all buffers that have auto-saving enabled
|
|
|
3869 and are changed since last auto-saved.
|
|
|
3870 Auto-saving writes the buffer into a file
|
|
|
3871 so that your editing is not lost if the system crashes.
|
|
|
3872 This file is not the file you visited; that changes only when you save.
|
|
|
3873 Normally we run the normal hook `auto-save-hook' before saving.
|
|
|
3874
|
|
|
3875 Non-nil first argument means do not print any message if successful.
|
|
|
3876 Non-nil second argument means save only current buffer.
|
|
|
3877 */
|
|
|
3878 (no_message, current_only))
|
|
|
3879 {
|
|
|
3880 /* This function can call lisp */
|
|
|
3881 struct buffer *b;
|
|
|
3882 Lisp_Object tail, buf;
|
|
|
3883 int auto_saved = 0;
|
|
|
3884 int do_handled_files;
|
|
|
3885 Lisp_Object oquit = Qnil;
|
|
|
3886 Lisp_Object listfile = Qnil;
|
|
|
3887 Lisp_Object old;
|
|
|
3888 int listdesc = -1;
|
|
|
3889 int speccount = specpdl_depth ();
|
|
|
3890 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3891
|
|
|
3892 XSETBUFFER (old, current_buffer);
|
|
|
3893 GCPRO3 (oquit, listfile, old);
|
|
|
3894 check_quit (); /* make Vquit_flag accurate */
|
|
|
3895 /* Ordinarily don't quit within this function,
|
|
|
3896 but don't make it impossible to quit (in case we get hung in I/O). */
|
|
|
3897 oquit = Vquit_flag;
|
|
|
3898 Vquit_flag = Qnil;
|
|
|
3899
|
|
|
3900 /* No further GCPRO needed, because (when it matters) all Lisp_Object
|
|
|
3901 variables point to non-strings reached from Vbuffer_alist. */
|
|
|
3902
|
|
|
3903 if (minibuf_level != 0 || preparing_for_armageddon)
|
|
|
3904 no_message = Qt;
|
|
|
3905
|
|
|
3906 run_hook (Qauto_save_hook);
|
|
|
3907
|
|
|
3908 if (STRINGP (Vauto_save_list_file_name))
|
|
|
3909 listfile = condition_case_1 (Qt,
|
|
|
3910 auto_save_expand_name,
|
|
|
3911 Vauto_save_list_file_name,
|
|
|
3912 auto_save_expand_name_error, Qnil);
|
|
|
3913
|
|
|
3914 /* Make sure auto_saving is reset. */
|
|
|
3915 record_unwind_protect (do_auto_save_unwind_2, make_int (auto_saving));
|
|
|
3916
|
|
|
3917 auto_saving = 1;
|
|
|
3918
|
|
|
3919 /* First, save all files which don't have handlers. If Emacs is
|
|
|
3920 crashing, the handlers may tweak what is causing Emacs to crash
|
|
|
3921 in the first place, and it would be a shame if Emacs failed to
|
|
|
3922 autosave perfectly ordinary files because it couldn't handle some
|
|
|
3923 ange-ftp'd file. */
|
|
|
3924 for (do_handled_files = 0; do_handled_files < 2; do_handled_files++)
|
|
|
3925 {
|
|
|
3926 for (tail = Vbuffer_alist;
|
|
|
3927 CONSP (tail);
|
|
|
3928 tail = XCDR (tail))
|
|
|
3929 {
|
|
|
3930 buf = XCDR (XCAR (tail));
|
|
|
3931 b = XBUFFER (buf);
|
|
|
3932
|
|
|
3933 if (!NILP (current_only)
|
|
|
3934 && b != current_buffer)
|
|
|
3935 continue;
|
|
|
3936
|
|
|
3937 /* Don't auto-save indirect buffers.
|
|
|
3938 The base buffer takes care of it. */
|
|
|
3939 if (b->base_buffer)
|
|
|
3940 continue;
|
|
|
3941
|
|
|
3942 /* Check for auto save enabled
|
|
|
3943 and file changed since last auto save
|
|
|
3944 and file changed since last real save. */
|
|
|
3945 if (STRINGP (b->auto_save_file_name)
|
|
|
3946 && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b)
|
|
|
3947 && b->auto_save_modified < BUF_MODIFF (b)
|
|
|
3948 /* -1 means we've turned off autosaving for a while--see below. */
|
|
|
3949 && XINT (b->saved_size) >= 0
|
|
|
3950 && (do_handled_files
|
|
|
3951 || NILP (Ffind_file_name_handler (b->auto_save_file_name,
|
|
|
3952 Qwrite_region))))
|
|
|
3953 {
|
|
|
3954 EMACS_TIME before_time, after_time;
|
|
|
3955
|
|
|
3956 EMACS_GET_TIME (before_time);
|
|
|
3957 /* If we had a failure, don't try again for 20 minutes. */
|
|
|
3958 if (!preparing_for_armageddon
|
|
|
3959 && b->auto_save_failure_time >= 0
|
|
|
3960 && (EMACS_SECS (before_time) - b->auto_save_failure_time <
|
|
|
3961 1200))
|
|
|
3962 continue;
|
|
|
3963
|
|
|
3964 if (!preparing_for_armageddon &&
|
|
|
3965 (XINT (b->saved_size) * 10
|
|
|
3966 > (BUF_Z (b) - BUF_BEG (b)) * 13)
|
|
|
3967 /* A short file is likely to change a large fraction;
|
|
|
3968 spare the user annoying messages. */
|
|
|
3969 && XINT (b->saved_size) > 5000
|
|
|
3970 /* These messages are frequent and annoying for `*mail*'. */
|
|
|
3971 && !NILP (b->filename)
|
|
|
3972 && NILP (no_message)
|
|
|
3973 && disable_auto_save_when_buffer_shrinks)
|
|
|
3974 {
|
|
|
3975 /* It has shrunk too much; turn off auto-saving here.
|
|
|
3976 Unless we're about to crash, in which case auto-save it
|
|
|
3977 anyway.
|
|
|
3978 */
|
|
|
3979 message
|
|
|
3980 ("Buffer %s has shrunk a lot; auto save turned off there",
|
|
|
3981 XSTRING_DATA (b->name));
|
|
|
3982 /* Turn off auto-saving until there's a real save,
|
|
|
3983 and prevent any more warnings. */
|
|
|
3984 b->saved_size = make_int (-1);
|
|
|
3985 if (!gc_in_progress)
|
|
|
3986 Fsleep_for (make_int (1));
|
|
|
3987 continue;
|
|
|
3988 }
|
|
|
3989 set_buffer_internal (b);
|
|
|
3990 if (!auto_saved && NILP (no_message))
|
|
|
3991 {
|
|
|
3992 static CONST unsigned char *msg
|
|
|
3993 = (CONST unsigned char *) "Auto-saving...";
|
|
|
3994 echo_area_message (selected_frame (), msg, Qnil,
|
|
|
3995 0, strlen ((CONST char *) msg),
|
|
|
3996 Qauto_saving);
|
|
|
3997 }
|
|
|
3998
|
|
|
3999 /* Open the auto-save list file, if necessary.
|
|
|
4000 We only do this now so that the file only exists
|
|
|
4001 if we actually auto-saved any files. */
|
|
|
4002 if (!auto_saved && STRINGP (listfile) && listdesc < 0)
|
|
|
4003 {
|
|
|
4004 listdesc = open ((char *) XSTRING_DATA (listfile),
|
|
|
4005 O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY,
|
|
|
4006 CREAT_MODE);
|
|
|
4007
|
|
|
4008 /* Arrange to close that file whether or not we get
|
|
|
4009 an error. */
|
|
|
4010 if (listdesc >= 0)
|
|
|
4011 record_unwind_protect (do_auto_save_unwind,
|
|
|
4012 make_int (listdesc));
|
|
|
4013 }
|
|
|
4014
|
|
|
4015 /* Record all the buffers that we are auto-saving in
|
|
|
4016 the special file that lists them. For each of
|
|
|
4017 these buffers, record visited name (if any) and
|
|
|
4018 auto save name. */
|
|
|
4019 if (listdesc >= 0)
|
|
|
4020 {
|
|
|
4021 CONST Extbyte *auto_save_file_name_ext;
|
|
|
4022 Extcount auto_save_file_name_ext_len;
|
|
|
4023
|
|
|
4024 GET_STRING_FILENAME_DATA_ALLOCA
|
|
|
4025 (b->auto_save_file_name,
|
|
|
4026 auto_save_file_name_ext,
|
|
|
4027 auto_save_file_name_ext_len);
|
|
|
4028 if (!NILP (b->filename))
|
|
|
4029 {
|
|
|
4030 CONST Extbyte *filename_ext;
|
|
|
4031 Extcount filename_ext_len;
|
|
|
4032
|
|
|
4033 GET_STRING_FILENAME_DATA_ALLOCA (b->filename,
|
|
|
4034 filename_ext,
|
|
|
4035 filename_ext_len);
|
|
|
4036 write (listdesc, filename_ext, filename_ext_len);
|
|
|
4037 }
|
|
|
4038 write (listdesc, "\n", 1);
|
|
|
4039 write (listdesc, auto_save_file_name_ext,
|
|
|
4040 auto_save_file_name_ext_len);
|
|
|
4041 write (listdesc, "\n", 1);
|
|
|
4042 }
|
|
|
4043
|
|
|
4044 /* dmoore - In a bad scenario we've set b=XBUFFER(buf)
|
|
|
4045 based on values in Vbuffer_alist. auto_save_1 may
|
|
|
4046 cause lisp handlers to run. Those handlers may kill
|
|
|
4047 the buffer and then GC. Since the buffer is killed,
|
|
|
4048 it's no longer in Vbuffer_alist so it might get reaped
|
|
|
4049 by the GC. We also need to protect tail. */
|
|
|
4050 /* #### There is probably a lot of other code which has
|
|
|
4051 pointers into buffers which may get blown away by
|
|
|
4052 handlers. */
|
|
|
4053 {
|
|
|
4054 struct gcpro ngcpro1, ngcpro2;
|
|
|
4055 NGCPRO2 (buf, tail);
|
|
|
4056 condition_case_1 (Qt,
|
|
|
4057 auto_save_1, Qnil,
|
|
|
4058 auto_save_error, Qnil);
|
|
|
4059 NUNGCPRO;
|
|
|
4060 }
|
|
|
4061 /* Handler killed our saved current-buffer! Pick any. */
|
|
|
4062 if (!BUFFER_LIVE_P (XBUFFER (old)))
|
|
|
4063 XSETBUFFER (old, current_buffer);
|
|
|
4064
|
|
|
4065 set_buffer_internal (XBUFFER (old));
|
|
|
4066 auto_saved++;
|
|
|
4067
|
|
|
4068 /* Handler killed their own buffer! */
|
|
|
4069 if (!BUFFER_LIVE_P(b))
|
|
|
4070 continue;
|
|
|
4071
|
|
|
4072 b->auto_save_modified = BUF_MODIFF (b);
|
|
|
4073 b->saved_size = make_int (BUF_SIZE (b));
|
|
|
4074 EMACS_GET_TIME (after_time);
|
|
|
4075 /* If auto-save took more than 60 seconds,
|
|
|
4076 assume it was an NFS failure that got a timeout. */
|
|
|
4077 if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60)
|
|
|
4078 b->auto_save_failure_time = EMACS_SECS (after_time);
|
|
|
4079 }
|
|
|
4080 }
|
|
|
4081 }
|
|
|
4082
|
|
|
4083 /* Prevent another auto save till enough input events come in. */
|
|
|
4084 if (auto_saved)
|
|
|
4085 record_auto_save ();
|
|
|
4086
|
|
|
4087 /* If we didn't save anything into the listfile, remove the old
|
|
|
4088 one because nothing needed to be auto-saved. Do this afterwards
|
|
|
4089 rather than before in case we get a crash attempting to autosave
|
|
|
4090 (in that case we'd still want the old one around). */
|
|
|
4091 if (listdesc < 0 && !auto_saved && STRINGP (listfile))
|
|
|
4092 unlink ((char *) XSTRING_DATA (listfile));
|
|
|
4093
|
|
|
4094 /* Show "...done" only if the echo area would otherwise be empty. */
|
|
|
4095 if (auto_saved && NILP (no_message)
|
|
|
4096 && NILP (clear_echo_area (selected_frame (), Qauto_saving, 0)))
|
|
|
4097 {
|
|
|
4098 static CONST unsigned char *msg
|
|
|
4099 = (CONST unsigned char *)"Auto-saving...done";
|
|
|
4100 echo_area_message (selected_frame (), msg, Qnil, 0,
|
|
|
4101 strlen ((CONST char *) msg), Qauto_saving);
|
|
|
4102 }
|
|
|
4103
|
|
|
4104 Vquit_flag = oquit;
|
|
|
4105
|
|
|
4106 RETURN_UNGCPRO (unbind_to (speccount, Qnil));
|
|
|
4107 }
|
|
|
4108
|
|
|
4109 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, 0, 0, 0, /*
|
|
|
4110 Mark current buffer as auto-saved with its current text.
|
|
|
4111 No auto-save file will be written until the buffer changes again.
|
|
|
4112 */
|
|
|
4113 ())
|
|
|
4114 {
|
|
|
4115 current_buffer->auto_save_modified = BUF_MODIFF (current_buffer);
|
|
|
4116 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer));
|
|
|
4117 current_buffer->auto_save_failure_time = -1;
|
|
|
4118 return Qnil;
|
|
|
4119 }
|
|
|
4120
|
|
|
4121 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, 0, 0, 0, /*
|
|
|
4122 Clear any record of a recent auto-save failure in the current buffer.
|
|
|
4123 */
|
|
|
4124 ())
|
|
|
4125 {
|
|
|
4126 current_buffer->auto_save_failure_time = -1;
|
|
|
4127 return Qnil;
|
|
|
4128 }
|
|
|
4129
|
|
|
4130 DEFUN ("recent-auto-save-p", Frecent_auto_save_p, 0, 0, 0, /*
|
|
|
4131 Return t if buffer has been auto-saved since last read in or saved.
|
|
|
4132 */
|
|
|
4133 ())
|
|
|
4134 {
|
|
|
4135 return (BUF_SAVE_MODIFF (current_buffer) <
|
|
|
4136 current_buffer->auto_save_modified) ? Qt : Qnil;
|
|
|
4137 }
|
|
|
4138
|
|
|
4139
|
|
|
4140 /************************************************************************/
|
|
|
4141 /* initialization */
|
|
|
4142 /************************************************************************/
|
|
|
4143
|
|
|
4144 void
|
|
|
4145 syms_of_fileio (void)
|
|
|
4146 {
|
|
|
4147 defsymbol (&Qexpand_file_name, "expand-file-name");
|
|
|
4148 defsymbol (&Qfile_truename, "file-truename");
|
|
|
4149 defsymbol (&Qsubstitute_in_file_name, "substitute-in-file-name");
|
|
|
4150 defsymbol (&Qdirectory_file_name, "directory-file-name");
|
|
|
4151 defsymbol (&Qfile_name_directory, "file-name-directory");
|
|
|
4152 defsymbol (&Qfile_name_nondirectory, "file-name-nondirectory");
|
|
|
4153 defsymbol (&Qunhandled_file_name_directory, "unhandled-file-name-directory");
|
|
|
4154 defsymbol (&Qfile_name_as_directory, "file-name-as-directory");
|
|
|
4155 defsymbol (&Qcopy_file, "copy-file");
|
|
|
4156 defsymbol (&Qmake_directory_internal, "make-directory-internal");
|
|
|
4157 defsymbol (&Qdelete_directory, "delete-directory");
|
|
|
4158 defsymbol (&Qdelete_file, "delete-file");
|
|
|
4159 defsymbol (&Qrename_file, "rename-file");
|
|
|
4160 defsymbol (&Qadd_name_to_file, "add-name-to-file");
|
|
|
4161 defsymbol (&Qmake_symbolic_link, "make-symbolic-link");
|
|
|
4162 defsymbol (&Qfile_exists_p, "file-exists-p");
|
|
|
4163 defsymbol (&Qfile_executable_p, "file-executable-p");
|
|
|
4164 defsymbol (&Qfile_readable_p, "file-readable-p");
|
|
|
4165 defsymbol (&Qfile_symlink_p, "file-symlink-p");
|
|
|
4166 defsymbol (&Qfile_writable_p, "file-writable-p");
|
|
|
4167 defsymbol (&Qfile_directory_p, "file-directory-p");
|
|
|
4168 defsymbol (&Qfile_regular_p, "file-regular-p");
|
|
|
4169 defsymbol (&Qfile_accessible_directory_p, "file-accessible-directory-p");
|
|
|
4170 defsymbol (&Qfile_modes, "file-modes");
|
|
|
4171 defsymbol (&Qset_file_modes, "set-file-modes");
|
|
|
4172 defsymbol (&Qfile_newer_than_file_p, "file-newer-than-file-p");
|
|
|
4173 defsymbol (&Qinsert_file_contents, "insert-file-contents");
|
|
|
4174 defsymbol (&Qwrite_region, "write-region");
|
|
|
4175 defsymbol (&Qverify_visited_file_modtime, "verify-visited-file-modtime");
|
|
|
4176 defsymbol (&Qset_visited_file_modtime, "set-visited-file-modtime");
|
|
|
4177 defsymbol (&Qcar_less_than_car, "car-less-than-car"); /* Vomitous! */
|
|
|
4178
|
|
|
4179 defsymbol (&Qauto_save_hook, "auto-save-hook");
|
|
|
4180 defsymbol (&Qauto_save_error, "auto-save-error");
|
|
|
4181 defsymbol (&Qauto_saving, "auto-saving");
|
|
|
4182
|
|
|
4183 defsymbol (&Qformat_decode, "format-decode");
|
|
|
4184 defsymbol (&Qformat_annotate_function, "format-annotate-function");
|
|
|
4185
|
|
|
4186 defsymbol (&Qcompute_buffer_file_truename, "compute-buffer-file-truename");
|
|
|
4187 deferror (&Qfile_error, "file-error", "File error", Qio_error);
|
|
|
4188 deferror (&Qfile_already_exists, "file-already-exists",
|
|
|
4189 "File already exists", Qfile_error);
|
|
|
4190
|
|
|
4191 DEFSUBR (Ffind_file_name_handler);
|
|
|
4192
|
|
|
4193 DEFSUBR (Ffile_name_directory);
|
|
|
4194 DEFSUBR (Ffile_name_nondirectory);
|
|
|
4195 DEFSUBR (Funhandled_file_name_directory);
|
|
|
4196 DEFSUBR (Ffile_name_as_directory);
|
|
|
4197 DEFSUBR (Fdirectory_file_name);
|
|
|
4198 DEFSUBR (Fmake_temp_name);
|
|
|
4199 DEFSUBR (Fexpand_file_name);
|
|
|
4200 DEFSUBR (Ffile_truename);
|
|
|
4201 DEFSUBR (Fsubstitute_in_file_name);
|
|
|
4202 DEFSUBR (Fcopy_file);
|
|
|
4203 DEFSUBR (Fmake_directory_internal);
|
|
|
4204 DEFSUBR (Fdelete_directory);
|
|
|
4205 DEFSUBR (Fdelete_file);
|
|
|
4206 DEFSUBR (Frename_file);
|
|
|
4207 DEFSUBR (Fadd_name_to_file);
|
|
|
4208 #ifdef S_IFLNK
|
|
|
4209 DEFSUBR (Fmake_symbolic_link);
|
|
|
4210 #endif /* S_IFLNK */
|
|
|
4211 #ifdef HPUX_NET
|
|
|
4212 DEFSUBR (Fsysnetunam);
|
|
|
4213 #endif /* HPUX_NET */
|
|
|
4214 DEFSUBR (Ffile_name_absolute_p);
|
|
|
4215 DEFSUBR (Ffile_exists_p);
|
|
|
4216 DEFSUBR (Ffile_executable_p);
|
|
|
4217 DEFSUBR (Ffile_readable_p);
|
|
|
4218 DEFSUBR (Ffile_writable_p);
|
|
|
4219 DEFSUBR (Ffile_symlink_p);
|
|
|
4220 DEFSUBR (Ffile_directory_p);
|
|
|
4221 DEFSUBR (Ffile_accessible_directory_p);
|
|
|
4222 DEFSUBR (Ffile_regular_p);
|
|
|
4223 DEFSUBR (Ffile_modes);
|
|
|
4224 DEFSUBR (Fset_file_modes);
|
|
|
4225 DEFSUBR (Fset_default_file_modes);
|
|
|
4226 DEFSUBR (Fdefault_file_modes);
|
|
|
4227 DEFSUBR (Funix_sync);
|
|
|
4228 DEFSUBR (Ffile_newer_than_file_p);
|
|
|
4229 DEFSUBR (Finsert_file_contents_internal);
|
|
|
4230 DEFSUBR (Fwrite_region_internal);
|
|
|
4231 DEFSUBR (Fcar_less_than_car); /* Vomitous! */
|
|
|
4232 DEFSUBR (Fcdr_less_than_cdr); /* Yeah oh yeah bucko .... */
|
|
|
4233 #if 0
|
|
|
4234 DEFSUBR (Fencrypt_string);
|
|
|
4235 DEFSUBR (Fdecrypt_string);
|
|
|
4236 #endif
|
|
|
4237 DEFSUBR (Fverify_visited_file_modtime);
|
|
|
4238 DEFSUBR (Fclear_visited_file_modtime);
|
|
|
4239 DEFSUBR (Fvisited_file_modtime);
|
|
|
4240 DEFSUBR (Fset_visited_file_modtime);
|
|
|
4241
|
|
|
4242 DEFSUBR (Fdo_auto_save);
|
|
|
4243 DEFSUBR (Fset_buffer_auto_saved);
|
|
|
4244 DEFSUBR (Fclear_buffer_auto_save_failure);
|
|
|
4245 DEFSUBR (Frecent_auto_save_p);
|
|
|
4246 }
|
|
|
4247
|
|
|
4248 void
|
|
|
4249 vars_of_fileio (void)
|
|
|
4250 {
|
|
|
4251 DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format /*
|
|
|
4252 *Format in which to write auto-save files.
|
|
|
4253 Should be a list of symbols naming formats that are defined in `format-alist'.
|
|
|
4254 If it is t, which is the default, auto-save files are written in the
|
|
|
4255 same format as a regular save would use.
|
|
|
4256 */ );
|
|
|
4257 Vauto_save_file_format = Qt;
|
|
|
4258
|
|
|
4259 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist /*
|
|
|
4260 *Alist of elements (REGEXP . HANDLER) for file names handled specially.
|
|
|
4261 If a file name matches REGEXP, then all I/O on that file is done by calling
|
|
|
4262 HANDLER.
|
|
|
4263
|
|
|
4264 The first argument given to HANDLER is the name of the I/O primitive
|
|
|
4265 to be handled; the remaining arguments are the arguments that were
|
|
|
4266 passed to that primitive. For example, if you do
|
|
|
4267 (file-exists-p FILENAME)
|
|
|
4268 and FILENAME is handled by HANDLER, then HANDLER is called like this:
|
|
|
4269 (funcall HANDLER 'file-exists-p FILENAME)
|
|
|
4270 The function `find-file-name-handler' checks this list for a handler
|
|
|
4271 for its argument.
|
|
|
4272 */ );
|
|
|
4273 Vfile_name_handler_alist = Qnil;
|
|
|
4274
|
|
|
4275 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions /*
|
|
|
4276 A list of functions to be called at the end of `insert-file-contents'.
|
|
|
4277 Each is passed one argument, the number of bytes inserted. It should return
|
|
|
4278 the new byte count, and leave point the same. If `insert-file-contents' is
|
|
|
4279 intercepted by a handler from `file-name-handler-alist', that handler is
|
|
|
4280 responsible for calling the after-insert-file-functions if appropriate.
|
|
|
4281 */ );
|
|
|
4282 Vafter_insert_file_functions = Qnil;
|
|
|
4283
|
|
|
4284 DEFVAR_LISP ("write-region-annotate-functions",
|
|
|
4285 &Vwrite_region_annotate_functions /*
|
|
|
4286 A list of functions to be called at the start of `write-region'.
|
|
|
4287 Each is passed two arguments, START and END, as for `write-region'.
|
|
|
4288 It should return a list of pairs (POSITION . STRING) of strings to be
|
|
|
4289 effectively inserted at the specified positions of the file being written
|
|
|
4290 \(1 means to insert before the first byte written). The POSITIONs must be
|
|
|
4291 sorted into increasing order. If there are several functions in the list,
|
|
|
4292 the several lists are merged destructively.
|
|
|
4293 */ );
|
|
|
4294 Vwrite_region_annotate_functions = Qnil;
|
|
|
4295
|
|
|
4296 DEFVAR_LISP ("write-region-annotations-so-far",
|
|
|
4297 &Vwrite_region_annotations_so_far /*
|
|
|
4298 When an annotation function is called, this holds the previous annotations.
|
|
|
4299 These are the annotations made by other annotation functions
|
|
|
4300 that were already called. See also `write-region-annotate-functions'.
|
|
|
4301 */ );
|
|
|
4302 Vwrite_region_annotations_so_far = Qnil;
|
|
|
4303
|
|
|
4304 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers /*
|
|
|
4305 A list of file name handlers that temporarily should not be used.
|
|
|
4306 This applies only to the operation `inhibit-file-name-operation'.
|
|
|
4307 */ );
|
|
|
4308 Vinhibit_file_name_handlers = Qnil;
|
|
|
4309
|
|
|
4310 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation /*
|
|
|
4311 The operation for which `inhibit-file-name-handlers' is applicable.
|
|
|
4312 */ );
|
|
|
4313 Vinhibit_file_name_operation = Qnil;
|
|
|
4314
|
|
|
4315 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name /*
|
|
|
4316 File name in which we write a list of all auto save file names.
|
|
|
4317 */ );
|
|
|
4318 Vauto_save_list_file_name = Qnil;
|
|
|
4319
|
|
|
4320 DEFVAR_BOOL ("disable-auto-save-when-buffer-shrinks",
|
|
|
4321 &disable_auto_save_when_buffer_shrinks /*
|
|
|
4322 If non-nil, auto-saving is disabled when a buffer shrinks too much.
|
|
|
4323 This is to prevent you from losing your edits if you accidentally
|
|
|
4324 delete a large chunk of the buffer and don't notice it until too late.
|
|
|
4325 Saving the buffer normally turns auto-save back on.
|
|
|
4326 */ );
|
|
|
4327 disable_auto_save_when_buffer_shrinks = 1;
|
|
|
4328
|
|
|
4329 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char /*
|
|
|
4330 Directory separator character for built-in functions that return file names.
|
|
|
4331 The value should be either ?/ or ?\\ (any other value is treated as ?\\).
|
|
|
4332 This variable affects the built-in functions only on Windows,
|
|
|
4333 on other platforms, it is initialized so that Lisp code can find out
|
|
|
4334 what the normal separator is.
|
|
|
4335 */ );
|
|
|
4336 Vdirectory_sep_char = make_char ('/');
|
|
|
4337 }
|
