Mercurial > gnulib
annotate lib/clean-temp.c @ 9309:bbbbbf4cd1c5
Change copyright notice from GPLv2+ to GPLv3+.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sun, 07 Oct 2007 19:14:58 +0200 |
| parents | a162347a0232 |
| children | e8d2c6fc33ad |
| rev | line source |
|---|---|
| 7044 | 1 /* Temporary directories and temporary files with automatic cleanup. |
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2 Copyright (C) 2001, 2003, 2006-2007 Free Software Foundation, Inc. |
| 7044 | 3 Written by Bruno Haible <bruno@clisp.org>, 2006. |
| 4 | |
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5 This program is free software: you can redistribute it and/or modify |
| 7044 | 6 it under the terms of the GNU General Public License as published by |
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7 the Free Software Foundation; either version 3 of the License, or |
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8 (at your option) any later version. |
| 7044 | 9 |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 7044 | 17 |
| 18 | |
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19 #include <config.h> |
| 7044 | 20 |
| 21 /* Specification. */ | |
| 22 #include "clean-temp.h" | |
| 23 | |
| 24 #include <errno.h> | |
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25 #include <fcntl.h> |
| 7044 | 26 #include <limits.h> |
| 27 #include <stdbool.h> | |
| 28 #include <stdlib.h> | |
| 29 #include <string.h> | |
| 30 #include <unistd.h> | |
| 31 | |
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32 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
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33 # define WIN32_LEAN_AND_MEAN /* avoid including junk */ |
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34 # include <windows.h> |
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35 #endif |
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36 |
| 7044 | 37 #include "error.h" |
| 38 #include "fatal-signal.h" | |
| 39 #include "pathmax.h" | |
| 40 #include "tmpdir.h" | |
| 41 #include "xalloc.h" | |
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42 #include "xmalloca.h" |
| 7044 | 43 #include "gl_linkedhash_list.h" |
| 44 #include "gettext.h" | |
| 7513 | 45 #if GNULIB_FWRITEERROR |
| 46 # include "fwriteerror.h" | |
| 47 #endif | |
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48 #if GNULIB_CLOSE_STREAM |
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49 # include "close-stream.h" |
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50 #endif |
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51 #if GNULIB_FCNTL_SAFER |
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52 # include "fcntl--.h" |
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53 #endif |
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54 #if GNULIB_FOPEN_SAFER |
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55 # include "stdio--.h" |
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56 #endif |
| 7044 | 57 |
| 58 #define _(str) gettext (str) | |
| 59 | |
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60 /* GNU Hurd doesn't have PATH_MAX. */ |
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61 #ifndef PATH_MAX |
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62 # ifdef MAXPATHLEN |
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63 # define PATH_MAX MAXPATHLEN |
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64 # else |
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65 # define PATH_MAX 1024 |
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66 # endif |
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67 #endif |
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68 |
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69 #ifndef uintptr_t |
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70 # define uintptr_t unsigned long |
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71 #endif |
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72 |
| 7863 | 73 #if !GNULIB_FCNTL_SAFER |
| 74 /* The results of open() in this file are not used with fchdir, | |
| 75 therefore save some unnecessary work in fchdir.c. */ | |
| 76 # undef open | |
| 77 # undef close | |
| 78 #endif | |
| 79 | |
| 7044 | 80 |
| 81 /* The use of 'volatile' in the types below (and ISO C 99 section 5.1.2.3.(5)) | |
| 82 ensure that while constructing or modifying the data structures, the field | |
| 83 values are written to memory in the order of the C statements. So the | |
| 84 signal handler can rely on these field values to be up to date. */ | |
| 85 | |
| 86 | |
| 87 /* Registry for a single temporary directory. | |
| 88 'struct temp_dir' from the public header file overlaps with this. */ | |
| 89 struct tempdir | |
| 90 { | |
| 91 /* The absolute pathname of the directory. */ | |
| 92 char * volatile dirname; | |
| 93 /* Whether errors during explicit cleanup are reported to standard error. */ | |
| 94 bool cleanup_verbose; | |
| 95 /* Absolute pathnames of subdirectories. */ | |
| 96 gl_list_t /* <char *> */ volatile subdirs; | |
| 97 /* Absolute pathnames of files. */ | |
| 98 gl_list_t /* <char *> */ volatile files; | |
| 99 }; | |
| 100 | |
| 101 /* List of all temporary directories. */ | |
| 102 static struct | |
| 103 { | |
| 104 struct tempdir * volatile * volatile tempdir_list; | |
| 105 size_t volatile tempdir_count; | |
| 106 size_t tempdir_allocated; | |
| 107 } cleanup_list /* = { NULL, 0, 0 } */; | |
| 108 | |
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109 /* List of all open file descriptors to temporary files. */ |
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110 static gl_list_t /* <int> */ volatile descriptors; |
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111 |
| 7044 | 112 |
| 113 /* For the subdirs and for the files, we use a gl_list_t of type LINKEDHASH. | |
| 114 Why? We need a data structure that | |
| 115 | |
| 116 1) Can contain an arbitrary number of 'char *' values. The strings | |
| 117 are compared via strcmp, not pointer comparison. | |
| 118 2) Has insertion and deletion operations that are fast: ideally O(1), | |
| 119 or possibly O(log n). This is important for GNU sort, which may | |
| 120 create a large number of temporary files. | |
| 121 3) Allows iteration through all elements from within a signal handler. | |
| 122 4) May or may not allow duplicates. It doesn't matter here, since | |
| 123 any file or subdir can only be removed once. | |
| 124 | |
| 125 Criterion 1) would allow any gl_list_t or gl_oset_t implementation. | |
| 126 | |
| 127 Criterion 2) leaves only GL_LINKEDHASH_LIST, GL_TREEHASH_LIST, or | |
| 128 GL_TREE_OSET. | |
| 129 | |
| 130 Criterion 3) puts at disadvantage GL_TREEHASH_LIST and GL_TREE_OSET. | |
| 131 Namely, iteration through the elements of a binary tree requires access | |
| 132 to many ->left, ->right, ->parent pointers. However, the rebalancing | |
| 133 code for insertion and deletion in an AVL or red-black tree is so | |
| 134 complicated that we cannot assume that >left, ->right, ->parent pointers | |
| 135 are in a consistent state throughout these operations. Therefore, to | |
| 136 avoid a crash in the signal handler, all destructive operations to the | |
| 137 lists would have to be protected by a | |
| 138 block_fatal_signals (); | |
| 139 ... | |
| 140 unblock_fatal_signals (); | |
| 141 pair. Which causes extra system calls. | |
| 142 | |
| 143 Criterion 3) would also discourage GL_ARRAY_LIST and GL_CARRAY_LIST, | |
| 144 if they were not already excluded. Namely, these implementations use | |
| 145 xrealloc(), leaving a time window in which in the list->elements pointer | |
| 146 points to already deallocated memory. To avoid a crash in the signal | |
| 147 handler at such a moment, all destructive operations would have to | |
| 148 protected by block/unblock_fatal_signals (), in this case too. | |
| 149 | |
| 150 A list of type GL_LINKEDHASH_LIST without duplicates fulfills all | |
| 151 requirements: | |
| 152 2) Insertion and deletion are O(1) on average. | |
| 153 3) The gl_list_iterator, gl_list_iterator_next implementations do | |
| 154 not trigger memory allocations, nor other system calls, and are | |
| 155 therefore safe to be called from a signal handler. | |
| 156 Furthermore, since SIGNAL_SAFE_LIST is defined, the implementation | |
| 157 of the destructive functions ensures that the list structure is | |
| 158 safe to be traversed at any moment, even when interrupted by an | |
| 159 asynchronous signal. | |
| 160 */ | |
| 161 | |
| 162 /* String equality and hash code functions used by the lists. */ | |
| 163 | |
| 164 static bool | |
| 165 string_equals (const void *x1, const void *x2) | |
| 166 { | |
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167 const char *s1 = (const char *) x1; |
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168 const char *s2 = (const char *) x2; |
| 7044 | 169 return strcmp (s1, s2) == 0; |
| 170 } | |
| 171 | |
| 172 #define SIZE_BITS (sizeof (size_t) * CHAR_BIT) | |
| 173 | |
| 174 /* A hash function for NUL-terminated char* strings using | |
| 175 the method described by Bruno Haible. | |
| 176 See http://www.haible.de/bruno/hashfunc.html. */ | |
| 177 static size_t | |
| 178 string_hash (const void *x) | |
| 179 { | |
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180 const char *s = (const char *) x; |
| 7044 | 181 size_t h = 0; |
| 182 | |
| 183 for (; *s; s++) | |
| 184 h = *s + ((h << 9) | (h >> (SIZE_BITS - 9))); | |
| 185 | |
| 186 return h; | |
| 187 } | |
| 188 | |
| 189 | |
| 190 /* The signal handler. It gets called asynchronously. */ | |
| 191 static void | |
| 192 cleanup () | |
| 193 { | |
| 194 size_t i; | |
| 195 | |
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196 /* First close all file descriptors to temporary files. */ |
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197 { |
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198 gl_list_t fds = descriptors; |
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199 |
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200 if (fds != NULL) |
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201 { |
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202 gl_list_iterator_t iter; |
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203 const void *element; |
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204 |
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205 iter = gl_list_iterator (fds); |
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206 while (gl_list_iterator_next (&iter, &element, NULL)) |
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207 { |
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208 int fd = (int) (uintptr_t) element; |
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209 close (fd); |
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210 } |
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211 gl_list_iterator_free (&iter); |
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212 } |
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213 } |
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214 |
| 7044 | 215 for (i = 0; i < cleanup_list.tempdir_count; i++) |
| 216 { | |
| 217 struct tempdir *dir = cleanup_list.tempdir_list[i]; | |
| 218 | |
| 219 if (dir != NULL) | |
| 220 { | |
| 221 gl_list_iterator_t iter; | |
| 222 const void *element; | |
| 223 | |
| 224 /* First cleanup the files in the subdirectories. */ | |
| 225 iter = gl_list_iterator (dir->files); | |
| 226 while (gl_list_iterator_next (&iter, &element, NULL)) | |
| 227 { | |
| 228 const char *file = (const char *) element; | |
| 229 unlink (file); | |
| 230 } | |
| 231 gl_list_iterator_free (&iter); | |
| 232 | |
| 233 /* Then cleanup the subdirectories. */ | |
| 234 iter = gl_list_iterator (dir->subdirs); | |
| 235 while (gl_list_iterator_next (&iter, &element, NULL)) | |
| 236 { | |
| 237 const char *subdir = (const char *) element; | |
| 238 rmdir (subdir); | |
| 239 } | |
| 240 gl_list_iterator_free (&iter); | |
| 241 | |
| 242 /* Then cleanup the temporary directory itself. */ | |
| 243 rmdir (dir->dirname); | |
| 244 } | |
| 245 } | |
| 246 } | |
| 247 | |
| 248 /* Create a temporary directory. | |
| 249 PREFIX is used as a prefix for the name of the temporary directory. It | |
| 250 should be short and still give an indication about the program. | |
| 251 PARENTDIR can be used to specify the parent directory; if NULL, a default | |
| 252 parent directory is used (either $TMPDIR or /tmp or similar). | |
| 253 CLEANUP_VERBOSE determines whether errors during explicit cleanup are | |
| 254 reported to standard error. | |
| 255 Return a fresh 'struct temp_dir' on success. Upon error, an error message | |
| 256 is shown and NULL is returned. */ | |
| 257 struct temp_dir * | |
| 258 create_temp_dir (const char *prefix, const char *parentdir, | |
| 259 bool cleanup_verbose) | |
| 260 { | |
| 261 struct tempdir * volatile *tmpdirp = NULL; | |
| 262 struct tempdir *tmpdir; | |
| 263 size_t i; | |
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264 char *xtemplate; |
| 7044 | 265 char *tmpdirname; |
| 266 | |
| 267 /* See whether it can take the slot of an earlier temporary directory | |
| 268 already cleaned up. */ | |
| 269 for (i = 0; i < cleanup_list.tempdir_count; i++) | |
| 270 if (cleanup_list.tempdir_list[i] == NULL) | |
| 271 { | |
| 272 tmpdirp = &cleanup_list.tempdir_list[i]; | |
| 273 break; | |
| 274 } | |
| 275 if (tmpdirp == NULL) | |
| 276 { | |
| 277 /* See whether the array needs to be extended. */ | |
| 278 if (cleanup_list.tempdir_count == cleanup_list.tempdir_allocated) | |
| 279 { | |
| 280 /* Note that we cannot use xrealloc(), because then the cleanup() | |
| 281 function could access an already deallocated array. */ | |
| 282 struct tempdir * volatile *old_array = cleanup_list.tempdir_list; | |
| 283 size_t old_allocated = cleanup_list.tempdir_allocated; | |
| 284 size_t new_allocated = 2 * cleanup_list.tempdir_allocated + 1; | |
| 285 struct tempdir * volatile *new_array = | |
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286 XNMALLOC (new_allocated, struct tempdir * volatile); |
| 7044 | 287 |
| 288 if (old_allocated == 0) | |
| 289 /* First use of this facility. Register the cleanup handler. */ | |
| 290 at_fatal_signal (&cleanup); | |
| 291 else | |
| 292 { | |
| 293 /* Don't use memcpy() here, because memcpy takes non-volatile | |
| 294 arguments and is therefore not guaranteed to complete all | |
| 295 memory stores before the next statement. */ | |
| 296 size_t k; | |
| 297 | |
| 298 for (k = 0; k < old_allocated; k++) | |
| 299 new_array[k] = old_array[k]; | |
| 300 } | |
| 301 | |
| 302 cleanup_list.tempdir_list = new_array; | |
| 303 cleanup_list.tempdir_allocated = new_allocated; | |
| 304 | |
| 305 /* Now we can free the old array. */ | |
| 306 if (old_array != NULL) | |
| 307 free ((struct tempdir **) old_array); | |
| 308 } | |
| 309 | |
| 310 tmpdirp = &cleanup_list.tempdir_list[cleanup_list.tempdir_count]; | |
| 311 /* Initialize *tmpdirp before incrementing tempdir_count, so that | |
| 312 cleanup() will skip this entry before it is fully initialized. */ | |
| 313 *tmpdirp = NULL; | |
| 314 cleanup_list.tempdir_count++; | |
| 315 } | |
| 316 | |
| 317 /* Initialize a 'struct tempdir'. */ | |
|
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diff
changeset
|
318 tmpdir = XMALLOC (struct tempdir); |
| 7044 | 319 tmpdir->dirname = NULL; |
| 320 tmpdir->cleanup_verbose = cleanup_verbose; | |
| 321 tmpdir->subdirs = gl_list_create_empty (GL_LINKEDHASH_LIST, | |
|
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Allow the use of a destructor for the values stored in the list.
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diff
changeset
|
322 string_equals, string_hash, NULL, |
|
238942284e2f
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diff
changeset
|
323 false); |
| 7044 | 324 tmpdir->files = gl_list_create_empty (GL_LINKEDHASH_LIST, |
|
8438
238942284e2f
Allow the use of a destructor for the values stored in the list.
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diff
changeset
|
325 string_equals, string_hash, NULL, |
|
238942284e2f
Allow the use of a destructor for the values stored in the list.
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diff
changeset
|
326 false); |
| 7044 | 327 |
| 328 /* Create the temporary directory. */ | |
|
8948
a162347a0232
Update after allocsa -> malloca renaming.
Bruno Haible <bruno@clisp.org>
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8438
diff
changeset
|
329 xtemplate = (char *) xmalloca (PATH_MAX); |
|
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4a8b5467d8b2
Make it compile in C++ mode.
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7513
diff
changeset
|
330 if (path_search (xtemplate, PATH_MAX, parentdir, prefix, parentdir == NULL)) |
| 7044 | 331 { |
| 332 error (0, errno, | |
| 333 _("cannot find a temporary directory, try setting $TMPDIR")); | |
| 334 goto quit; | |
| 335 } | |
| 336 block_fatal_signals (); | |
|
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Make it compile in C++ mode.
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7513
diff
changeset
|
337 tmpdirname = mkdtemp (xtemplate); |
| 7044 | 338 if (tmpdirname != NULL) |
| 339 { | |
| 340 tmpdir->dirname = tmpdirname; | |
| 341 *tmpdirp = tmpdir; | |
| 342 } | |
| 343 unblock_fatal_signals (); | |
| 344 if (tmpdirname == NULL) | |
| 345 { | |
| 346 error (0, errno, | |
| 347 _("cannot create a temporary directory using template \"%s\""), | |
|
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Make it compile in C++ mode.
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7513
diff
changeset
|
348 xtemplate); |
| 7044 | 349 goto quit; |
| 350 } | |
| 351 /* Replace tmpdir->dirname with a copy that has indefinite extent. | |
| 352 We cannot do this inside the block_fatal_signals/unblock_fatal_signals | |
| 353 block because then the cleanup handler would not remove the directory | |
| 354 if xstrdup fails. */ | |
| 355 tmpdir->dirname = xstrdup (tmpdirname); | |
|
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Update after allocsa -> malloca renaming.
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8438
diff
changeset
|
356 freea (xtemplate); |
| 7044 | 357 return (struct temp_dir *) tmpdir; |
| 358 | |
| 359 quit: | |
|
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diff
changeset
|
360 freea (xtemplate); |
| 7044 | 361 return NULL; |
| 362 } | |
| 363 | |
| 364 /* Register the given ABSOLUTE_FILE_NAME as being a file inside DIR, that | |
| 365 needs to be removed before DIR can be removed. | |
| 366 Should be called before the file ABSOLUTE_FILE_NAME is created. */ | |
| 367 void | |
| 368 register_temp_file (struct temp_dir *dir, | |
| 369 const char *absolute_file_name) | |
| 370 { | |
| 371 struct tempdir *tmpdir = (struct tempdir *)dir; | |
| 372 | |
| 373 /* Add absolute_file_name to tmpdir->files, without duplicates. */ | |
| 374 if (gl_list_search (tmpdir->files, absolute_file_name) == NULL) | |
| 375 gl_list_add_first (tmpdir->files, xstrdup (absolute_file_name)); | |
| 376 } | |
| 377 | |
| 378 /* Unregister the given ABSOLUTE_FILE_NAME as being a file inside DIR, that | |
| 379 needs to be removed before DIR can be removed. | |
| 380 Should be called when the file ABSOLUTE_FILE_NAME could not be created. */ | |
| 381 void | |
| 382 unregister_temp_file (struct temp_dir *dir, | |
| 383 const char *absolute_file_name) | |
| 384 { | |
| 385 struct tempdir *tmpdir = (struct tempdir *)dir; | |
| 386 gl_list_t list = tmpdir->files; | |
| 387 gl_list_node_t node; | |
| 388 | |
| 389 node = gl_list_search (list, absolute_file_name); | |
| 390 if (node != NULL) | |
| 391 { | |
| 392 char *old_string = (char *) gl_list_node_value (list, node); | |
| 393 | |
| 394 gl_list_remove_node (list, node); | |
| 395 free (old_string); | |
| 396 } | |
| 397 } | |
| 398 | |
| 399 /* Register the given ABSOLUTE_DIR_NAME as being a subdirectory inside DIR, | |
| 400 that needs to be removed before DIR can be removed. | |
| 401 Should be called before the subdirectory ABSOLUTE_DIR_NAME is created. */ | |
| 402 void | |
| 403 register_temp_subdir (struct temp_dir *dir, | |
| 404 const char *absolute_dir_name) | |
| 405 { | |
| 406 struct tempdir *tmpdir = (struct tempdir *)dir; | |
| 407 | |
| 408 /* Add absolute_dir_name to tmpdir->subdirs, without duplicates. */ | |
| 409 if (gl_list_search (tmpdir->subdirs, absolute_dir_name) == NULL) | |
| 410 gl_list_add_first (tmpdir->subdirs, xstrdup (absolute_dir_name)); | |
| 411 } | |
| 412 | |
| 413 /* Unregister the given ABSOLUTE_DIR_NAME as being a subdirectory inside DIR, | |
| 414 that needs to be removed before DIR can be removed. | |
| 415 Should be called when the subdirectory ABSOLUTE_DIR_NAME could not be | |
| 416 created. */ | |
| 417 void | |
| 418 unregister_temp_subdir (struct temp_dir *dir, | |
| 419 const char *absolute_dir_name) | |
| 420 { | |
| 421 struct tempdir *tmpdir = (struct tempdir *)dir; | |
| 422 gl_list_t list = tmpdir->subdirs; | |
| 423 gl_list_node_t node; | |
| 424 | |
| 425 node = gl_list_search (list, absolute_dir_name); | |
| 426 if (node != NULL) | |
| 427 { | |
| 428 char *old_string = (char *) gl_list_node_value (list, node); | |
| 429 | |
| 430 gl_list_remove_node (list, node); | |
| 431 free (old_string); | |
| 432 } | |
| 433 } | |
| 434 | |
| 7415 | 435 /* Remove a file, with optional error message. |
| 436 Return 0 upon success, or -1 if there was some problem. */ | |
| 437 static int | |
| 7044 | 438 do_unlink (struct temp_dir *dir, const char *absolute_file_name) |
| 439 { | |
| 440 if (unlink (absolute_file_name) < 0 && dir->cleanup_verbose | |
| 441 && errno != ENOENT) | |
| 7415 | 442 { |
| 443 error (0, errno, _("cannot remove temporary file %s"), absolute_file_name); | |
| 444 return -1; | |
| 445 } | |
| 446 return 0; | |
| 7044 | 447 } |
| 448 | |
| 7415 | 449 /* Remove a directory, with optional error message. |
| 450 Return 0 upon success, or -1 if there was some problem. */ | |
| 451 static int | |
| 7044 | 452 do_rmdir (struct temp_dir *dir, const char *absolute_dir_name) |
| 453 { | |
| 454 if (rmdir (absolute_dir_name) < 0 && dir->cleanup_verbose | |
| 455 && errno != ENOENT) | |
| 7415 | 456 { |
| 457 error (0, errno, | |
| 458 _("cannot remove temporary directory %s"), absolute_dir_name); | |
| 459 return -1; | |
| 460 } | |
| 461 return 0; | |
| 7044 | 462 } |
| 463 | |
| 7415 | 464 /* Remove the given ABSOLUTE_FILE_NAME and unregister it. |
| 465 Return 0 upon success, or -1 if there was some problem. */ | |
| 466 int | |
| 7044 | 467 cleanup_temp_file (struct temp_dir *dir, |
| 468 const char *absolute_file_name) | |
| 469 { | |
| 7415 | 470 int err; |
| 471 | |
| 472 err = do_unlink (dir, absolute_file_name); | |
| 7044 | 473 unregister_temp_file (dir, absolute_file_name); |
| 7415 | 474 |
| 475 return err; | |
| 7044 | 476 } |
| 477 | |
| 7415 | 478 /* Remove the given ABSOLUTE_DIR_NAME and unregister it. |
| 479 Return 0 upon success, or -1 if there was some problem. */ | |
| 480 int | |
| 7044 | 481 cleanup_temp_subdir (struct temp_dir *dir, |
| 482 const char *absolute_dir_name) | |
| 483 { | |
| 7415 | 484 int err; |
| 485 | |
| 486 err = do_rmdir (dir, absolute_dir_name); | |
| 7044 | 487 unregister_temp_subdir (dir, absolute_dir_name); |
| 7415 | 488 |
| 489 return err; | |
| 7044 | 490 } |
| 491 | |
| 7415 | 492 /* Remove all registered files and subdirectories inside DIR. |
| 493 Return 0 upon success, or -1 if there was some problem. */ | |
| 494 int | |
| 7044 | 495 cleanup_temp_dir_contents (struct temp_dir *dir) |
| 496 { | |
| 497 struct tempdir *tmpdir = (struct tempdir *)dir; | |
| 7415 | 498 int err = 0; |
| 7044 | 499 gl_list_t list; |
| 500 gl_list_iterator_t iter; | |
| 501 const void *element; | |
| 502 gl_list_node_t node; | |
| 503 | |
| 504 /* First cleanup the files in the subdirectories. */ | |
| 505 list = tmpdir->files; | |
| 506 iter = gl_list_iterator (list); | |
| 507 while (gl_list_iterator_next (&iter, &element, &node)) | |
| 508 { | |
| 509 char *file = (char *) element; | |
| 510 | |
| 7415 | 511 err |= do_unlink (dir, file); |
| 7044 | 512 gl_list_remove_node (list, node); |
| 513 /* Now only we can free file. */ | |
| 514 free (file); | |
| 515 } | |
| 516 gl_list_iterator_free (&iter); | |
| 517 | |
| 518 /* Then cleanup the subdirectories. */ | |
| 519 list = tmpdir->subdirs; | |
| 520 iter = gl_list_iterator (list); | |
| 521 while (gl_list_iterator_next (&iter, &element, &node)) | |
| 522 { | |
| 523 char *subdir = (char *) element; | |
| 524 | |
| 7415 | 525 err |= do_rmdir (dir, subdir); |
| 7044 | 526 gl_list_remove_node (list, node); |
| 527 /* Now only we can free subdir. */ | |
| 528 free (subdir); | |
| 529 } | |
| 530 gl_list_iterator_free (&iter); | |
| 7415 | 531 |
| 532 return err; | |
| 7044 | 533 } |
| 534 | |
| 535 /* Remove all registered files and subdirectories inside DIR and DIR itself. | |
| 7415 | 536 DIR cannot be used any more after this call. |
| 537 Return 0 upon success, or -1 if there was some problem. */ | |
| 538 int | |
| 7044 | 539 cleanup_temp_dir (struct temp_dir *dir) |
| 540 { | |
| 541 struct tempdir *tmpdir = (struct tempdir *)dir; | |
| 7415 | 542 int err = 0; |
| 7044 | 543 size_t i; |
| 544 | |
| 7415 | 545 err |= cleanup_temp_dir_contents (dir); |
| 546 err |= do_rmdir (dir, tmpdir->dirname); | |
| 7044 | 547 |
| 548 for (i = 0; i < cleanup_list.tempdir_count; i++) | |
| 549 if (cleanup_list.tempdir_list[i] == tmpdir) | |
| 550 { | |
| 551 /* Remove cleanup_list.tempdir_list[i]. */ | |
| 552 if (i + 1 == cleanup_list.tempdir_count) | |
| 553 { | |
| 554 while (i > 0 && cleanup_list.tempdir_list[i - 1] == NULL) | |
| 555 i--; | |
| 556 cleanup_list.tempdir_count = i; | |
| 557 } | |
| 558 else | |
| 559 cleanup_list.tempdir_list[i] = NULL; | |
| 560 /* Now only we can free the tmpdir->dirname and tmpdir itself. */ | |
| 561 free (tmpdir->dirname); | |
| 562 free (tmpdir); | |
| 7415 | 563 return err; |
| 7044 | 564 } |
| 565 | |
| 566 /* The user passed an invalid DIR argument. */ | |
| 567 abort (); | |
| 568 } | |
|
7411
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Have clean-temp register file open descriptors to temporary files.
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parents:
7304
diff
changeset
|
569 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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parents:
7304
diff
changeset
|
570 |
|
8161
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
571 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
572 |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
573 /* On Windows, opening a file with _O_TEMPORARY has the effect of passing |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
574 the FILE_FLAG_DELETE_ON_CLOSE flag to CreateFile(), which has the effect |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
575 of deleting the file when it is closed - even when the program crashes. |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
576 But (according to the Cygwin sources) it works only on Windows NT or newer. |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
577 So we cache the info whether we are running on Windows NT or newer. */ |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
578 |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
579 static bool |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
580 supports_delete_on_close () |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
581 { |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
582 static int known; /* 1 = yes, -1 = no, 0 = unknown */ |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
583 if (!known) |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
584 { |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
585 OSVERSIONINFO v; |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
586 |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
587 if (GetVersionEx (&v)) |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
588 known = (v.dwPlatformId == VER_PLATFORM_WIN32_NT ? 1 : -1); |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
589 else |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
590 known = -1; |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
591 } |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
592 return (known > 0); |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
593 } |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
594 |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
595 #endif |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
Bruno Haible <bruno@clisp.org>
parents:
7863
diff
changeset
|
596 |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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parents:
7863
diff
changeset
|
597 |
|
7411
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
598 /* Register a file descriptor to be closed. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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parents:
7304
diff
changeset
|
599 static void |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
600 register_fd (int fd) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
601 { |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
602 if (descriptors == NULL) |
|
8438
238942284e2f
Allow the use of a destructor for the values stored in the list.
Bruno Haible <bruno@clisp.org>
parents:
8192
diff
changeset
|
603 descriptors = gl_list_create_empty (GL_LINKEDHASH_LIST, NULL, NULL, NULL, |
|
238942284e2f
Allow the use of a destructor for the values stored in the list.
Bruno Haible <bruno@clisp.org>
parents:
8192
diff
changeset
|
604 false); |
|
7411
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
605 gl_list_add_first (descriptors, (void *) (uintptr_t) fd); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
606 } |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
607 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
608 /* Unregister a file descriptor to be closed. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
609 static void |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
610 unregister_fd (int fd) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
611 { |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
612 gl_list_t fds = descriptors; |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
613 gl_list_node_t node; |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
614 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
615 if (fds == NULL) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
616 /* descriptors should already contain fd. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
617 abort (); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
618 node = gl_list_search (fds, (void *) (uintptr_t) fd); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
619 if (node == NULL) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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changeset
|
620 /* descriptors should already contain fd. */ |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
621 abort (); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
622 gl_list_remove_node (fds, node); |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
623 } |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
624 |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
625 /* Open a temporary file in a temporary directory. |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
626 Registers the resulting file descriptor to be closed. */ |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
627 int |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
628 open_temp (const char *file_name, int flags, mode_t mode) |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
629 { |
|
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Have clean-temp register file open descriptors to temporary files.
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|
630 int fd; |
|
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Have clean-temp register file open descriptors to temporary files.
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|
631 int saved_errno; |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
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|
632 |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
633 block_fatal_signals (); |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
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|
634 /* Note: 'open' here is actually open() or open_safer(). */ |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
635 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
636 /* Use _O_TEMPORARY when possible, to increase the chances that the |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
637 temporary file is removed when the process crashes. */ |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
638 if (supports_delete_on_close ()) |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
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|
639 fd = open (file_name, flags | _O_TEMPORARY, mode); |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
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|
640 else |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
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|
641 #endif |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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changeset
|
642 fd = open (file_name, flags, mode); |
|
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Have clean-temp register file open descriptors to temporary files.
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|
643 saved_errno = errno; |
|
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Have clean-temp register file open descriptors to temporary files.
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changeset
|
644 if (fd >= 0) |
|
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Have clean-temp register file open descriptors to temporary files.
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|
645 register_fd (fd); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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|
646 unblock_fatal_signals (); |
|
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Have clean-temp register file open descriptors to temporary files.
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|
647 errno = saved_errno; |
|
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Have clean-temp register file open descriptors to temporary files.
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648 return fd; |
|
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|
649 } |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
650 |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
651 /* Open a temporary file in a temporary directory. |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
652 Registers the resulting file descriptor to be closed. */ |
|
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Have clean-temp register file open descriptors to temporary files.
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changeset
|
653 FILE * |
|
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Have clean-temp register file open descriptors to temporary files.
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changeset
|
654 fopen_temp (const char *file_name, const char *mode) |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
655 { |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
656 FILE *fp; |
|
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Have clean-temp register file open descriptors to temporary files.
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|
657 int saved_errno; |
|
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Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
658 |
|
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Have clean-temp register file open descriptors to temporary files.
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changeset
|
659 block_fatal_signals (); |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
660 /* Note: 'fopen' here is actually fopen() or fopen_safer(). */ |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
661 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
662 /* Use _O_TEMPORARY when possible, to increase the chances that the |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
663 temporary file is removed when the process crashes. */ |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
664 if (supports_delete_on_close ()) |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
665 { |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
666 size_t mode_len = strlen (mode); |
|
8948
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Update after allocsa -> malloca renaming.
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diff
changeset
|
667 char *augmented_mode = (char *) xmalloca (mode_len + 2); |
|
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diff
changeset
|
668 memcpy (augmented_mode, mode, mode_len); |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
669 memcpy (augmented_mode + mode_len, "D", 2); |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
670 |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
671 fp = fopen (file_name, augmented_mode); |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
672 saved_errno = errno; |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
673 |
|
8948
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Update after allocsa -> malloca renaming.
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diff
changeset
|
674 freea (augmented_mode); |
|
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diff
changeset
|
675 } |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
676 else |
|
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Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
677 #endif |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
678 { |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
679 fp = fopen (file_name, mode); |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
680 saved_errno = errno; |
|
f7359fba603e
Make use of _O_TEMPORARY on native Woe32 platforms.
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diff
changeset
|
681 } |
|
7411
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
682 if (fp != NULL) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
683 { |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
684 /* It is sufficient to register fileno (fp) instead of the entire fp, |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
685 because at cleanup time there is no need to do an fflush (fp); a |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
686 close (fileno (fp)) will be enough. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
687 int fd = fileno (fp); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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parents:
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diff
changeset
|
688 if (!(fd >= 0)) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
689 abort (); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
690 register_fd (fd); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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7304
diff
changeset
|
691 } |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
692 unblock_fatal_signals (); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
693 errno = saved_errno; |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
694 return fp; |
|
67235cf9199a
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7304
diff
changeset
|
695 } |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
696 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
697 /* Close a temporary file in a temporary directory. |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
698 Unregisters the previously registered file descriptor. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
699 int |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
700 close_temp (int fd) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
701 { |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
702 if (fd >= 0) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
703 { |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
704 /* No blocking of signals is needed here, since a double close of a |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
705 file descriptor is harmless. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
706 int result = close (fd); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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diff
changeset
|
707 int saved_errno = errno; |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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parents:
7304
diff
changeset
|
708 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
709 /* No race condition here: we assume a single-threaded program, hence |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
710 fd cannot be re-opened here. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
711 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
712 unregister_fd (fd); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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parents:
7304
diff
changeset
|
713 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
714 errno = saved_errno; |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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parents:
7304
diff
changeset
|
715 return result; |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
716 } |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
717 else |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
718 return close (fd); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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parents:
7304
diff
changeset
|
719 } |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
720 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
721 /* Close a temporary file in a temporary directory. |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
722 Unregisters the previously registered file descriptor. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
723 int |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
724 fclose_temp (FILE *fp) |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
725 { |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
726 int fd = fileno (fp); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
727 /* No blocking of signals is needed here, since a double close of a |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
728 file descriptor is harmless. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
729 int result = fclose (fp); |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
730 int saved_errno = errno; |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
731 |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
732 /* No race condition here: we assume a single-threaded program, hence |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
Bruno Haible <bruno@clisp.org>
parents:
7304
diff
changeset
|
733 fd cannot be re-opened here. */ |
|
67235cf9199a
Have clean-temp register file open descriptors to temporary files.
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734 |
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735 unregister_fd (fd); |
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736 |
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737 errno = saved_errno; |
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738 return result; |
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739 } |
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740 |
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741 #if GNULIB_FWRITEERROR |
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742 /* Like fwriteerror. |
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743 Unregisters the previously registered file descriptor. */ |
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744 int |
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745 fwriteerror_temp (FILE *fp) |
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746 { |
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747 int fd = fileno (fp); |
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748 /* No blocking of signals is needed here, since a double close of a |
|
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749 file descriptor is harmless. */ |
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750 int result = fwriteerror (fp); |
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751 int saved_errno = errno; |
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752 |
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|
753 /* No race condition here: we assume a single-threaded program, hence |
|
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754 fd cannot be re-opened here. */ |
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|
755 |
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756 unregister_fd (fd); |
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757 |
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758 errno = saved_errno; |
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759 return result; |
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760 } |
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761 #endif |
|
7417
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* clean-temp.h (close_stream_temp): New declaration.
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762 |
|
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763 #if GNULIB_CLOSE_STREAM |
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764 /* Like close_stream. |
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765 Unregisters the previously registered file descriptor. */ |
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766 int |
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767 close_stream_temp (FILE *fp) |
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768 { |
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769 int fd = fileno (fp); |
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770 /* No blocking of signals is needed here, since a double close of a |
|
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* clean-temp.h (close_stream_temp): New declaration.
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771 file descriptor is harmless. */ |
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772 int result = close_stream (fp); |
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773 int saved_errno = errno; |
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|
774 |
|
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* clean-temp.h (close_stream_temp): New declaration.
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775 /* No race condition here: we assume a single-threaded program, hence |
|
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776 fd cannot be re-opened here. */ |
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|
777 |
|
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* clean-temp.h (close_stream_temp): New declaration.
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|
778 unregister_fd (fd); |
|
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|
779 |
|
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780 errno = saved_errno; |
|
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781 return result; |
|
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782 } |
|
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783 #endif |