Commit | Line | Data |
---|---|---|
2f1de3dd | 1 | /* update-game-score.c --- Update a score file |
1d28afaf | 2 | Copyright (C) 2002, 2003 Free Software Foundation, Inc. |
2f1de3dd CW |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* This program is allows a game to securely and atomically update a | |
8eec804f CW |
22 | score file. It should be installed setuid, owned by an appropriate |
23 | user like `games'. | |
24 | ||
25 | Alternatively, it can be compiled without HAVE_SHARED_GAME_DIR | |
26 | defined, and in that case it will store scores in the user's home | |
27 | directory (it should NOT be setuid). | |
2f1de3dd CW |
28 | |
29 | Created 2002/03/22, by Colin Walters <walters@debian.org> | |
30 | */ | |
31 | ||
c42d6dbd EZ |
32 | #include <config.h> |
33 | ||
5b400482 | 34 | #ifdef HAVE_UNISTD_H |
2f1de3dd | 35 | #include <unistd.h> |
5b400482 | 36 | #endif |
2f1de3dd | 37 | #include <errno.h> |
5b400482 | 38 | #ifdef HAVE_STRING_H |
2f1de3dd | 39 | #include <string.h> |
5b400482 DL |
40 | #endif |
41 | #ifdef HAVE_STDLIB_H | |
2f1de3dd | 42 | #include <stdlib.h> |
5b400482 | 43 | #endif |
2f1de3dd CW |
44 | #include <stdio.h> |
45 | #include <time.h> | |
cd553ffb | 46 | #include <pwd.h> |
2f1de3dd | 47 | #include <ctype.h> |
5b400482 | 48 | #ifdef HAVE_FCNTL_H |
2f1de3dd | 49 | #include <fcntl.h> |
5b400482 DL |
50 | #endif |
51 | #ifdef STDC_HEADERS | |
8eec804f | 52 | #include <stdarg.h> |
5b400482 | 53 | #endif |
2f1de3dd | 54 | #include <sys/stat.h> |
2f1de3dd | 55 | |
5b400482 DL |
56 | /* Needed for SunOS4, for instance. */ |
57 | extern char *optarg; | |
58 | extern int optind, opterr; | |
59 | ||
2f1de3dd | 60 | #define MAX_ATTEMPTS 5 |
8eec804f CW |
61 | #define MAX_SCORES 200 |
62 | #define MAX_DATA_LEN 1024 | |
5795b420 | 63 | |
cf398788 CW |
64 | /* Declare the prototype for a general external function. */ |
65 | #if defined (PROTOTYPES) || defined (WINDOWSNT) | |
66 | #define P_(proto) proto | |
67 | #else | |
68 | #define P_(proto) () | |
69 | #endif | |
70 | ||
1d28afaf DL |
71 | #ifndef HAVE_DIFFTIME |
72 | /* OK on POSIX (time_t is arithmetic type) modulo overflow in subtraction. */ | |
73 | #define difftime(t1, t0) (double)((t1) - (t0)) | |
74 | #endif | |
75 | ||
2f1de3dd | 76 | int |
a5d107f3 | 77 | usage (err) |
cf398788 | 78 | int err; |
2f1de3dd | 79 | { |
a5d107f3 RS |
80 | fprintf (stdout, "Usage: update-game-score [-m MAX ] [ -r ] game/scorefile SCORE DATA\n"); |
81 | fprintf (stdout, " update-game-score -h\n"); | |
82 | fprintf (stdout, " -h\t\tDisplay this help.\n"); | |
83 | fprintf (stdout, " -m MAX\t\tLimit the maximum number of scores to MAX.\n"); | |
84 | fprintf (stdout, " -r\t\tSort the scores in increasing order.\n"); | |
85 | fprintf (stdout, " -d DIR\t\tStore scores in DIR (only if not setuid).\n"); | |
86 | exit (err); | |
2f1de3dd CW |
87 | } |
88 | ||
a5d107f3 RS |
89 | int lock_file P_ ((const char *filename, void **state)); |
90 | int unlock_file P_ ((const char *filename, void *state)); | |
2f1de3dd CW |
91 | |
92 | struct score_entry | |
93 | { | |
94 | long score; | |
cd553ffb | 95 | char *username; |
2f1de3dd CW |
96 | char *data; |
97 | }; | |
98 | ||
a5d107f3 RS |
99 | int read_scores P_ ((const char *filename, struct score_entry **scores, |
100 | int *count)); | |
101 | int push_score P_ ((struct score_entry **scores, int *count, | |
102 | int newscore, char *username, char *newdata)); | |
103 | void sort_scores P_ ((struct score_entry *scores, int count, int reverse)); | |
104 | int write_scores P_ ((const char *filename, const struct score_entry *scores, | |
105 | int count)); | |
cf398788 | 106 | |
a5d107f3 | 107 | void lose P_ ((const char *msg)) NO_RETURN; |
cf398788 | 108 | |
a5d107f3 RS |
109 | void |
110 | lose (msg) | |
cf398788 CW |
111 | const char *msg; |
112 | { | |
a5d107f3 RS |
113 | fprintf (stderr, "%s\n", msg); |
114 | exit (1); | |
cf398788 | 115 | } |
2f1de3dd | 116 | |
a5d107f3 | 117 | void lose_syserr P_ ((const char *msg)) NO_RETURN; |
d99fabf0 | 118 | |
1d28afaf DL |
119 | /* Taken from sysdep.c. */ |
120 | #ifndef HAVE_STRERROR | |
121 | #ifndef WINDOWSNT | |
122 | char * | |
123 | strerror (errnum) | |
124 | int errnum; | |
125 | { | |
126 | extern char *sys_errlist[]; | |
127 | extern int sys_nerr; | |
128 | ||
129 | if (errnum >= 0 && errnum < sys_nerr) | |
130 | return sys_errlist[errnum]; | |
131 | return (char *) "Unknown error"; | |
132 | } | |
133 | #endif /* not WINDOWSNT */ | |
134 | #endif /* ! HAVE_STRERROR */ | |
135 | ||
a5d107f3 RS |
136 | void |
137 | lose_syserr (msg) | |
cf398788 | 138 | const char *msg; |
d99fabf0 | 139 | { |
a5d107f3 RS |
140 | fprintf (stderr, "%s: %s\n", msg, strerror (errno)); |
141 | exit (1); | |
d99fabf0 CW |
142 | } |
143 | ||
cd553ffb | 144 | char * |
5b400482 | 145 | get_user_id P_ ((void)) |
cd553ffb CW |
146 | { |
147 | char *name; | |
a5d107f3 | 148 | struct passwd *buf = getpwuid (getuid ()); |
cd553ffb CW |
149 | if (!buf) |
150 | { | |
151 | int count = 1; | |
a5d107f3 | 152 | int uid = (int) getuid (); |
8eec804f CW |
153 | int tuid = uid; |
154 | while (tuid /= 10) | |
cd553ffb | 155 | count++; |
a5d107f3 | 156 | name = malloc (count+1); |
d99fabf0 CW |
157 | if (!name) |
158 | return NULL; | |
a5d107f3 | 159 | sprintf (name, "%d", uid); |
cd553ffb CW |
160 | return name; |
161 | } | |
162 | return buf->pw_name; | |
163 | } | |
164 | ||
5795b420 | 165 | char * |
a5d107f3 | 166 | get_prefix (running_suid, user_prefix) |
cf398788 CW |
167 | int running_suid; |
168 | char *user_prefix; | |
8eec804f | 169 | { |
d99fabf0 | 170 | if (!running_suid && user_prefix == NULL) |
a5d107f3 | 171 | lose ("Not using a shared game directory, and no prefix given."); |
d99fabf0 CW |
172 | if (running_suid) |
173 | { | |
174 | #ifdef HAVE_SHARED_GAME_DIR | |
175 | return HAVE_SHARED_GAME_DIR; | |
176 | #else | |
a5d107f3 | 177 | lose ("This program was compiled without HAVE_SHARED_GAME_DIR,\n and should not be suid."); |
d99fabf0 CW |
178 | #endif |
179 | } | |
180 | return user_prefix; | |
8eec804f CW |
181 | } |
182 | ||
2f1de3dd | 183 | int |
a5d107f3 | 184 | main (argc, argv) |
cf398788 CW |
185 | int argc; |
186 | char **argv; | |
2f1de3dd | 187 | { |
d99fabf0 | 188 | int c, running_suid; |
2f1de3dd | 189 | void *lockstate; |
d99fabf0 | 190 | char *user_id, *scorefile, *prefix, *user_prefix = NULL; |
2f1de3dd CW |
191 | struct stat buf; |
192 | struct score_entry *scores; | |
8eec804f | 193 | int newscore, scorecount, reverse = 0, max = MAX_SCORES; |
2f1de3dd CW |
194 | char *newdata; |
195 | ||
a5d107f3 | 196 | srand (time (0)); |
2f1de3dd | 197 | |
a5d107f3 | 198 | while ((c = getopt (argc, argv, "hrm:d:")) != -1) |
2f1de3dd CW |
199 | switch (c) |
200 | { | |
201 | case 'h': | |
a5d107f3 | 202 | usage (0); |
2f1de3dd | 203 | break; |
d99fabf0 CW |
204 | case 'd': |
205 | user_prefix = optarg; | |
206 | break; | |
2f1de3dd CW |
207 | case 'r': |
208 | reverse = 1; | |
209 | break; | |
210 | case 'm': | |
a5d107f3 | 211 | max = atoi (optarg); |
8eec804f CW |
212 | if (max > MAX_SCORES) |
213 | max = MAX_SCORES; | |
2f1de3dd CW |
214 | break; |
215 | default: | |
a5d107f3 | 216 | usage (1); |
2f1de3dd CW |
217 | } |
218 | ||
219 | if (optind+3 != argc) | |
a5d107f3 | 220 | usage (1); |
5795b420 | 221 | |
a5d107f3 | 222 | running_suid = (getuid () != geteuid ()); |
5795b420 | 223 | |
a5d107f3 | 224 | prefix = get_prefix (running_suid, user_prefix); |
8eec804f | 225 | |
a5d107f3 | 226 | scorefile = malloc (strlen (prefix) + strlen (argv[optind]) + 2); |
2f1de3dd | 227 | if (!scorefile) |
a5d107f3 | 228 | lose_syserr ("Couldn't allocate score file"); |
8eec804f | 229 | |
a5d107f3 RS |
230 | strcpy (scorefile, prefix); |
231 | strcat (scorefile, "/"); | |
232 | strcat (scorefile, argv[optind]); | |
233 | newscore = atoi (argv[optind+1]); | |
2f1de3dd | 234 | newdata = argv[optind+2]; |
a5d107f3 | 235 | if (strlen (newdata) > MAX_DATA_LEN) |
8eec804f | 236 | newdata[MAX_DATA_LEN] = '\0'; |
d99fabf0 | 237 | |
00a7e408 RS |
238 | user_id = get_user_id (); |
239 | if (user_id == NULL) | |
a5d107f3 | 240 | lose_syserr ("Couldn't determine user id"); |
177c0ea7 | 241 | |
a5d107f3 RS |
242 | if (stat (scorefile, &buf) < 0) |
243 | lose_syserr ("Failed to access scores file"); | |
177c0ea7 | 244 | |
a5d107f3 RS |
245 | if (lock_file (scorefile, &lockstate) < 0) |
246 | lose_syserr ("Failed to lock scores file"); | |
177c0ea7 | 247 | |
a5d107f3 | 248 | if (read_scores (scorefile, &scores, &scorecount) < 0) |
2f1de3dd | 249 | { |
a5d107f3 RS |
250 | unlock_file (scorefile, lockstate); |
251 | lose_syserr ("Failed to read scores file"); | |
2f1de3dd | 252 | } |
a5d107f3 | 253 | push_score (&scores, &scorecount, newscore, user_id, newdata); |
8eec804f CW |
254 | /* Limit the number of scores. If we're using reverse sorting, then |
255 | we should increment the beginning of the array, to skip over the | |
256 | *smallest* scores. Otherwise, we just decrement the number of | |
257 | scores, since the smallest will be at the end. */ | |
258 | if (scorecount > MAX_SCORES) | |
259 | scorecount -= (scorecount - MAX_SCORES); | |
260 | if (reverse) | |
261 | scores += (scorecount - MAX_SCORES); | |
a5d107f3 RS |
262 | sort_scores (scores, scorecount, reverse); |
263 | if (write_scores (scorefile, scores, scorecount) < 0) | |
2f1de3dd | 264 | { |
a5d107f3 RS |
265 | unlock_file (scorefile, lockstate); |
266 | lose_syserr ("Failed to write scores file"); | |
2f1de3dd | 267 | } |
a5d107f3 RS |
268 | unlock_file (scorefile, lockstate); |
269 | exit (0); | |
2f1de3dd CW |
270 | } |
271 | ||
272 | int | |
a5d107f3 | 273 | read_score (f, score) |
cf398788 CW |
274 | FILE *f; |
275 | struct score_entry *score; | |
2f1de3dd CW |
276 | { |
277 | int c; | |
a5d107f3 | 278 | if (feof (f)) |
2f1de3dd | 279 | return 1; |
a5d107f3 RS |
280 | while ((c = getc (f)) != EOF |
281 | && isdigit (c)) | |
cd553ffb CW |
282 | { |
283 | score->score *= 10; | |
284 | score->score += (c-48); | |
285 | } | |
a5d107f3 RS |
286 | while ((c = getc (f)) != EOF |
287 | && isspace (c)) | |
cd553ffb CW |
288 | ; |
289 | if (c == EOF) | |
290 | return -1; | |
a5d107f3 | 291 | ungetc (c, f); |
cd553ffb CW |
292 | #ifdef HAVE_GETDELIM |
293 | { | |
7605f1bd | 294 | size_t count = 0; |
a5d107f3 | 295 | if (getdelim (&score->username, &count, ' ', f) < 1 |
cd553ffb CW |
296 | || score->username == NULL) |
297 | return -1; | |
1d4328ff | 298 | /* Trim the space */ |
a5d107f3 | 299 | score->username[strlen (score->username)-1] = '\0'; |
2f1de3dd | 300 | } |
cd553ffb CW |
301 | #else |
302 | { | |
303 | int unameread = 0; | |
304 | int unamelen = 30; | |
a5d107f3 | 305 | char *username = malloc (unamelen); |
f5bceaf8 CW |
306 | if (!username) |
307 | return -1; | |
177c0ea7 | 308 | |
a5d107f3 RS |
309 | while ((c = getc (f)) != EOF |
310 | && !isspace (c)) | |
cd553ffb | 311 | { |
8eec804f | 312 | if (unameread >= unamelen-1) |
a5d107f3 | 313 | if (!(username = realloc (username, unamelen *= 2))) |
8eec804f | 314 | return -1; |
cd553ffb CW |
315 | username[unameread] = c; |
316 | unameread++; | |
317 | } | |
177c0ea7 | 318 | if (c == EOF) |
f5bceaf8 CW |
319 | return -1; |
320 | username[unameread] = '\0'; | |
cd553ffb CW |
321 | score->username = username; |
322 | } | |
323 | #endif | |
2f1de3dd CW |
324 | #ifdef HAVE_GETLINE |
325 | score->data = NULL; | |
7605f1bd | 326 | errno = 0; |
2f1de3dd | 327 | { |
7605f1bd | 328 | size_t len; |
a5d107f3 | 329 | if (getline (&score->data, &len, f) < 0) |
2f1de3dd | 330 | return -1; |
a5d107f3 | 331 | score->data[strlen (score->data)-1] = '\0'; |
2f1de3dd CW |
332 | } |
333 | #else | |
cd553ffb CW |
334 | { |
335 | int cur = 0; | |
336 | int len = 16; | |
a5d107f3 | 337 | char *buf = malloc (len); |
cd553ffb CW |
338 | if (!buf) |
339 | return -1; | |
a5d107f3 | 340 | while ((c = getc (f)) != EOF |
f5bceaf8 | 341 | && c != '\n') |
cd553ffb CW |
342 | { |
343 | if (cur >= len-1) | |
344 | { | |
a5d107f3 | 345 | if (!(buf = realloc (buf, len *= 2))) |
cd553ffb CW |
346 | return -1; |
347 | } | |
348 | buf[cur] = c; | |
349 | cur++; | |
350 | } | |
351 | score->data = buf; | |
5795b420 | 352 | score->data[cur] = '\0'; |
cd553ffb | 353 | } |
2f1de3dd | 354 | #endif |
2f1de3dd CW |
355 | return 0; |
356 | } | |
357 | ||
358 | int | |
a5d107f3 | 359 | read_scores (filename, scores, count) |
cf398788 CW |
360 | const char *filename; |
361 | struct score_entry **scores; | |
362 | int *count; | |
2f1de3dd CW |
363 | { |
364 | int readval, scorecount, cursize; | |
365 | struct score_entry *ret; | |
a5d107f3 | 366 | FILE *f = fopen (filename, "r"); |
177c0ea7 | 367 | if (!f) |
2f1de3dd CW |
368 | return -1; |
369 | scorecount = 0; | |
370 | cursize = 16; | |
00a7e408 | 371 | ret = (struct score_entry *) malloc (sizeof (struct score_entry) * cursize); |
177c0ea7 | 372 | if (!ret) |
2f1de3dd | 373 | return -1; |
a5d107f3 | 374 | while ((readval = read_score (f, &ret[scorecount])) == 0) |
2f1de3dd CW |
375 | { |
376 | /* We encoutered an error */ | |
377 | if (readval < 0) | |
378 | return -1; | |
379 | scorecount++; | |
380 | if (scorecount >= cursize) | |
381 | { | |
ee435bae JB |
382 | cursize *= 2; |
383 | ret = (struct score_entry *) | |
384 | realloc (ret, (sizeof (struct score_entry) * cursize)); | |
2f1de3dd CW |
385 | if (!ret) |
386 | return -1; | |
387 | } | |
388 | } | |
389 | *count = scorecount; | |
390 | *scores = ret; | |
391 | return 0; | |
392 | } | |
393 | ||
394 | int | |
a5d107f3 | 395 | score_compare (a, b) |
cf398788 CW |
396 | const void *a; |
397 | const void *b; | |
2f1de3dd CW |
398 | { |
399 | const struct score_entry *sa = (const struct score_entry *) a; | |
400 | const struct score_entry *sb = (const struct score_entry *) b; | |
401 | return (sb->score > sa->score) - (sb->score < sa->score); | |
402 | } | |
403 | ||
404 | int | |
a5d107f3 | 405 | score_compare_reverse (a, b) |
cf398788 CW |
406 | const void *a; |
407 | const void *b; | |
2f1de3dd CW |
408 | { |
409 | const struct score_entry *sa = (const struct score_entry *) a; | |
410 | const struct score_entry *sb = (const struct score_entry *) b; | |
411 | return (sa->score > sb->score) - (sa->score < sb->score); | |
412 | } | |
413 | ||
414 | int | |
177c0ea7 | 415 | push_score (scores, count, newscore, username, newdata) |
cf398788 CW |
416 | struct score_entry **scores; |
417 | int *count; int newscore; | |
418 | char *username; | |
419 | char *newdata; | |
2f1de3dd | 420 | { |
a5d107f3 | 421 | struct score_entry *newscores |
00a7e408 RS |
422 | = (struct score_entry *) realloc (*scores, |
423 | sizeof (struct score_entry) * ((*count) + 1)); | |
2f1de3dd CW |
424 | if (!newscores) |
425 | return -1; | |
426 | newscores[*count].score = newscore; | |
cd553ffb | 427 | newscores[*count].username = username; |
2f1de3dd CW |
428 | newscores[*count].data = newdata; |
429 | (*count) += 1; | |
430 | *scores = newscores; | |
431 | return 0; | |
432 | } | |
177c0ea7 | 433 | |
2f1de3dd | 434 | void |
a5d107f3 | 435 | sort_scores (scores, count, reverse) |
cf398788 CW |
436 | struct score_entry *scores; |
437 | int count; | |
177c0ea7 | 438 | int reverse; |
2f1de3dd | 439 | { |
a5d107f3 | 440 | qsort (scores, count, sizeof (struct score_entry), |
2f1de3dd CW |
441 | reverse ? score_compare_reverse : score_compare); |
442 | } | |
443 | ||
444 | int | |
a5d107f3 | 445 | write_scores (filename, scores, count) |
cf398788 CW |
446 | const char *filename; |
447 | const struct score_entry * scores; | |
177c0ea7 | 448 | int count; |
2f1de3dd | 449 | { |
177c0ea7 | 450 | FILE *f; |
2f1de3dd | 451 | int i; |
a5d107f3 | 452 | char *tempfile = malloc (strlen (filename) + strlen (".tempXXXXXX") + 1); |
2f1de3dd CW |
453 | if (!tempfile) |
454 | return -1; | |
a5d107f3 RS |
455 | strcpy (tempfile, filename); |
456 | strcat (tempfile, ".tempXXXXXX"); | |
8eec804f | 457 | #ifdef HAVE_MKSTEMP |
a5d107f3 | 458 | if (mkstemp (tempfile) < 0 |
8eec804f | 459 | #else |
a5d107f3 | 460 | if (mktemp (tempfile) != tempfile |
8eec804f | 461 | #endif |
a5d107f3 | 462 | || !(f = fopen (tempfile, "w"))) |
2f1de3dd CW |
463 | return -1; |
464 | for (i = 0; i < count; i++) | |
a5d107f3 | 465 | if (fprintf (f, "%ld %s %s\n", scores[i].score, scores[i].username, |
cd553ffb | 466 | scores[i].data) < 0) |
2f1de3dd | 467 | return -1; |
a5d107f3 RS |
468 | fclose (f); |
469 | if (rename (tempfile, filename) < 0) | |
2f1de3dd | 470 | return -1; |
a5d107f3 | 471 | if (chmod (filename, 0644) < 0) |
2f1de3dd | 472 | return -1; |
8eec804f | 473 | return 0; |
2f1de3dd | 474 | } |
177c0ea7 | 475 | |
2f1de3dd | 476 | int |
a5d107f3 | 477 | lock_file (filename, state) |
cf398788 CW |
478 | const char *filename; |
479 | void **state; | |
2f1de3dd CW |
480 | { |
481 | int fd; | |
7c4f6873 | 482 | struct stat buf; |
2f1de3dd CW |
483 | int attempts = 0; |
484 | char *lockext = ".lockfile"; | |
a5d107f3 | 485 | char *lockpath = malloc (strlen (filename) + strlen (lockext) + 60); |
2f1de3dd CW |
486 | if (!lockpath) |
487 | return -1; | |
a5d107f3 RS |
488 | strcpy (lockpath, filename); |
489 | strcat (lockpath, lockext); | |
2f1de3dd CW |
490 | *state = lockpath; |
491 | trylock: | |
492 | attempts++; | |
7c4f6873 | 493 | /* If the lock is over an hour old, delete it. */ |
a5d107f3 RS |
494 | if (stat (lockpath, &buf) == 0 |
495 | && (difftime (buf.st_ctime, time (NULL) > 60*60))) | |
496 | unlink (lockpath); | |
00a7e408 RS |
497 | fd = open (lockpath, O_CREAT | O_EXCL, 0600); |
498 | if (fd < 0) | |
2f1de3dd CW |
499 | { |
500 | if (errno == EEXIST) | |
501 | { | |
502 | /* Break the lock; we won't corrupt the file, but we might | |
503 | lose some scores. */ | |
504 | if (attempts > MAX_ATTEMPTS) | |
7c4f6873 | 505 | { |
a5d107f3 | 506 | unlink (lockpath); |
7c4f6873 CW |
507 | attempts = 0; |
508 | } | |
a5d107f3 | 509 | sleep ((rand () % 2)+1); |
2f1de3dd CW |
510 | goto trylock; |
511 | } | |
512 | else | |
513 | return -1; | |
514 | } | |
a5d107f3 | 515 | close (fd); |
2f1de3dd CW |
516 | return 0; |
517 | } | |
177c0ea7 | 518 | |
2f1de3dd | 519 | int |
a5d107f3 | 520 | unlock_file (filename, state) |
cf398788 CW |
521 | const char *filename; |
522 | void *state; | |
2f1de3dd CW |
523 | { |
524 | char *lockpath = (char *) state; | |
a5d107f3 | 525 | int ret = unlink (lockpath); |
2f1de3dd | 526 | int saved_errno = errno; |
a5d107f3 | 527 | free (lockpath); |
2f1de3dd CW |
528 | errno = saved_errno; |
529 | return ret; | |
530 | } | |
ab5796a9 MB |
531 | |
532 | /* arch-tag: 2bf5c52e-4beb-463a-954e-c58b9c64736b | |
533 | (do not change this comment) */ |