Commit | Line | Data |
---|---|---|
2f1de3dd | 1 | /* update-game-score.c --- Update a score file |
a5b68355 GM |
2 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
3 | Free Software Foundation, Inc. | |
2f1de3dd CW |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
4a9f99bd | 9 | the Free Software Foundation; either version 3, or (at your option) |
2f1de3dd CW |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
2f1de3dd CW |
21 | |
22 | /* This program is allows a game to securely and atomically update a | |
8eec804f CW |
23 | score file. It should be installed setuid, owned by an appropriate |
24 | user like `games'. | |
25 | ||
26 | Alternatively, it can be compiled without HAVE_SHARED_GAME_DIR | |
27 | defined, and in that case it will store scores in the user's home | |
28 | directory (it should NOT be setuid). | |
2f1de3dd CW |
29 | |
30 | Created 2002/03/22, by Colin Walters <walters@debian.org> | |
31 | */ | |
32 | ||
c42d6dbd EZ |
33 | #include <config.h> |
34 | ||
5b400482 | 35 | #ifdef HAVE_UNISTD_H |
2f1de3dd | 36 | #include <unistd.h> |
5b400482 | 37 | #endif |
2f1de3dd | 38 | #include <errno.h> |
5b400482 | 39 | #ifdef HAVE_STRING_H |
2f1de3dd | 40 | #include <string.h> |
5b400482 DL |
41 | #endif |
42 | #ifdef HAVE_STDLIB_H | |
2f1de3dd | 43 | #include <stdlib.h> |
5b400482 | 44 | #endif |
2f1de3dd CW |
45 | #include <stdio.h> |
46 | #include <time.h> | |
cd553ffb | 47 | #include <pwd.h> |
2f1de3dd | 48 | #include <ctype.h> |
5b400482 | 49 | #ifdef HAVE_FCNTL_H |
2f1de3dd | 50 | #include <fcntl.h> |
5b400482 DL |
51 | #endif |
52 | #ifdef STDC_HEADERS | |
8eec804f | 53 | #include <stdarg.h> |
5b400482 | 54 | #endif |
2f1de3dd | 55 | #include <sys/stat.h> |
2f1de3dd | 56 | |
5b400482 DL |
57 | /* Needed for SunOS4, for instance. */ |
58 | extern char *optarg; | |
59 | extern int optind, opterr; | |
60 | ||
2f1de3dd | 61 | #define MAX_ATTEMPTS 5 |
8eec804f CW |
62 | #define MAX_SCORES 200 |
63 | #define MAX_DATA_LEN 1024 | |
5795b420 | 64 | |
cf398788 CW |
65 | /* Declare the prototype for a general external function. */ |
66 | #if defined (PROTOTYPES) || defined (WINDOWSNT) | |
67 | #define P_(proto) proto | |
68 | #else | |
69 | #define P_(proto) () | |
70 | #endif | |
71 | ||
1d28afaf DL |
72 | #ifndef HAVE_DIFFTIME |
73 | /* OK on POSIX (time_t is arithmetic type) modulo overflow in subtraction. */ | |
74 | #define difftime(t1, t0) (double)((t1) - (t0)) | |
75 | #endif | |
76 | ||
2f1de3dd | 77 | int |
a5d107f3 | 78 | usage (err) |
cf398788 | 79 | int err; |
2f1de3dd | 80 | { |
a5d107f3 RS |
81 | fprintf (stdout, "Usage: update-game-score [-m MAX ] [ -r ] game/scorefile SCORE DATA\n"); |
82 | fprintf (stdout, " update-game-score -h\n"); | |
83 | fprintf (stdout, " -h\t\tDisplay this help.\n"); | |
84 | fprintf (stdout, " -m MAX\t\tLimit the maximum number of scores to MAX.\n"); | |
85 | fprintf (stdout, " -r\t\tSort the scores in increasing order.\n"); | |
86 | fprintf (stdout, " -d DIR\t\tStore scores in DIR (only if not setuid).\n"); | |
87 | exit (err); | |
2f1de3dd CW |
88 | } |
89 | ||
a5d107f3 RS |
90 | int lock_file P_ ((const char *filename, void **state)); |
91 | int unlock_file P_ ((const char *filename, void *state)); | |
2f1de3dd CW |
92 | |
93 | struct score_entry | |
94 | { | |
95 | long score; | |
cd553ffb | 96 | char *username; |
2f1de3dd CW |
97 | char *data; |
98 | }; | |
99 | ||
a5d107f3 RS |
100 | int read_scores P_ ((const char *filename, struct score_entry **scores, |
101 | int *count)); | |
102 | int push_score P_ ((struct score_entry **scores, int *count, | |
103 | int newscore, char *username, char *newdata)); | |
104 | void sort_scores P_ ((struct score_entry *scores, int count, int reverse)); | |
105 | int write_scores P_ ((const char *filename, const struct score_entry *scores, | |
106 | int count)); | |
cf398788 | 107 | |
a5d107f3 | 108 | void lose P_ ((const char *msg)) NO_RETURN; |
cf398788 | 109 | |
a5d107f3 RS |
110 | void |
111 | lose (msg) | |
cf398788 CW |
112 | const char *msg; |
113 | { | |
a5d107f3 | 114 | fprintf (stderr, "%s\n", msg); |
65396510 | 115 | exit (EXIT_FAILURE); |
cf398788 | 116 | } |
2f1de3dd | 117 | |
a5d107f3 | 118 | void lose_syserr P_ ((const char *msg)) NO_RETURN; |
d99fabf0 | 119 | |
1d28afaf DL |
120 | /* Taken from sysdep.c. */ |
121 | #ifndef HAVE_STRERROR | |
122 | #ifndef WINDOWSNT | |
123 | char * | |
124 | strerror (errnum) | |
125 | int errnum; | |
126 | { | |
127 | extern char *sys_errlist[]; | |
128 | extern int sys_nerr; | |
129 | ||
130 | if (errnum >= 0 && errnum < sys_nerr) | |
131 | return sys_errlist[errnum]; | |
132 | return (char *) "Unknown error"; | |
133 | } | |
134 | #endif /* not WINDOWSNT */ | |
135 | #endif /* ! HAVE_STRERROR */ | |
136 | ||
a5d107f3 RS |
137 | void |
138 | lose_syserr (msg) | |
cf398788 | 139 | const char *msg; |
d99fabf0 | 140 | { |
a5d107f3 | 141 | fprintf (stderr, "%s: %s\n", msg, strerror (errno)); |
65396510 | 142 | exit (EXIT_FAILURE); |
d99fabf0 CW |
143 | } |
144 | ||
cd553ffb | 145 | char * |
5b400482 | 146 | get_user_id P_ ((void)) |
cd553ffb CW |
147 | { |
148 | char *name; | |
a5d107f3 | 149 | struct passwd *buf = getpwuid (getuid ()); |
cd553ffb CW |
150 | if (!buf) |
151 | { | |
152 | int count = 1; | |
a5d107f3 | 153 | int uid = (int) getuid (); |
8eec804f CW |
154 | int tuid = uid; |
155 | while (tuid /= 10) | |
cd553ffb | 156 | count++; |
a5d107f3 | 157 | name = malloc (count+1); |
d99fabf0 CW |
158 | if (!name) |
159 | return NULL; | |
a5d107f3 | 160 | sprintf (name, "%d", uid); |
cd553ffb CW |
161 | return name; |
162 | } | |
163 | return buf->pw_name; | |
164 | } | |
165 | ||
5795b420 | 166 | char * |
a5d107f3 | 167 | get_prefix (running_suid, user_prefix) |
cf398788 CW |
168 | int running_suid; |
169 | char *user_prefix; | |
8eec804f | 170 | { |
d99fabf0 | 171 | if (!running_suid && user_prefix == NULL) |
a5d107f3 | 172 | lose ("Not using a shared game directory, and no prefix given."); |
d99fabf0 CW |
173 | if (running_suid) |
174 | { | |
175 | #ifdef HAVE_SHARED_GAME_DIR | |
176 | return HAVE_SHARED_GAME_DIR; | |
177 | #else | |
a5d107f3 | 178 | lose ("This program was compiled without HAVE_SHARED_GAME_DIR,\n and should not be suid."); |
d99fabf0 CW |
179 | #endif |
180 | } | |
181 | return user_prefix; | |
8eec804f CW |
182 | } |
183 | ||
2f1de3dd | 184 | int |
a5d107f3 | 185 | main (argc, argv) |
cf398788 CW |
186 | int argc; |
187 | char **argv; | |
2f1de3dd | 188 | { |
d99fabf0 | 189 | int c, running_suid; |
2f1de3dd | 190 | void *lockstate; |
d99fabf0 | 191 | char *user_id, *scorefile, *prefix, *user_prefix = NULL; |
2f1de3dd CW |
192 | struct stat buf; |
193 | struct score_entry *scores; | |
8eec804f | 194 | int newscore, scorecount, reverse = 0, max = MAX_SCORES; |
2f1de3dd CW |
195 | char *newdata; |
196 | ||
a5d107f3 | 197 | srand (time (0)); |
2f1de3dd | 198 | |
a5d107f3 | 199 | while ((c = getopt (argc, argv, "hrm:d:")) != -1) |
2f1de3dd CW |
200 | switch (c) |
201 | { | |
202 | case 'h': | |
65396510 | 203 | usage (EXIT_SUCCESS); |
2f1de3dd | 204 | break; |
d99fabf0 CW |
205 | case 'd': |
206 | user_prefix = optarg; | |
207 | break; | |
2f1de3dd CW |
208 | case 'r': |
209 | reverse = 1; | |
210 | break; | |
211 | case 'm': | |
a5d107f3 | 212 | max = atoi (optarg); |
8eec804f CW |
213 | if (max > MAX_SCORES) |
214 | max = MAX_SCORES; | |
2f1de3dd CW |
215 | break; |
216 | default: | |
65396510 | 217 | usage (EXIT_FAILURE); |
2f1de3dd CW |
218 | } |
219 | ||
220 | if (optind+3 != argc) | |
65396510 | 221 | usage (EXIT_FAILURE); |
5795b420 | 222 | |
a5d107f3 | 223 | running_suid = (getuid () != geteuid ()); |
5795b420 | 224 | |
a5d107f3 | 225 | prefix = get_prefix (running_suid, user_prefix); |
8eec804f | 226 | |
a5d107f3 | 227 | scorefile = malloc (strlen (prefix) + strlen (argv[optind]) + 2); |
2f1de3dd | 228 | if (!scorefile) |
a5d107f3 | 229 | lose_syserr ("Couldn't allocate score file"); |
8eec804f | 230 | |
a5d107f3 RS |
231 | strcpy (scorefile, prefix); |
232 | strcat (scorefile, "/"); | |
233 | strcat (scorefile, argv[optind]); | |
234 | newscore = atoi (argv[optind+1]); | |
2f1de3dd | 235 | newdata = argv[optind+2]; |
a5d107f3 | 236 | if (strlen (newdata) > MAX_DATA_LEN) |
8eec804f | 237 | newdata[MAX_DATA_LEN] = '\0'; |
d99fabf0 | 238 | |
00a7e408 RS |
239 | user_id = get_user_id (); |
240 | if (user_id == NULL) | |
a5d107f3 | 241 | lose_syserr ("Couldn't determine user id"); |
177c0ea7 | 242 | |
a5d107f3 RS |
243 | if (stat (scorefile, &buf) < 0) |
244 | lose_syserr ("Failed to access scores file"); | |
177c0ea7 | 245 | |
a5d107f3 RS |
246 | if (lock_file (scorefile, &lockstate) < 0) |
247 | lose_syserr ("Failed to lock scores file"); | |
177c0ea7 | 248 | |
a5d107f3 | 249 | if (read_scores (scorefile, &scores, &scorecount) < 0) |
2f1de3dd | 250 | { |
a5d107f3 RS |
251 | unlock_file (scorefile, lockstate); |
252 | lose_syserr ("Failed to read scores file"); | |
2f1de3dd | 253 | } |
a5d107f3 | 254 | push_score (&scores, &scorecount, newscore, user_id, newdata); |
8eec804f CW |
255 | /* Limit the number of scores. If we're using reverse sorting, then |
256 | we should increment the beginning of the array, to skip over the | |
257 | *smallest* scores. Otherwise, we just decrement the number of | |
258 | scores, since the smallest will be at the end. */ | |
259 | if (scorecount > MAX_SCORES) | |
260 | scorecount -= (scorecount - MAX_SCORES); | |
261 | if (reverse) | |
262 | scores += (scorecount - MAX_SCORES); | |
a5d107f3 RS |
263 | sort_scores (scores, scorecount, reverse); |
264 | if (write_scores (scorefile, scores, scorecount) < 0) | |
2f1de3dd | 265 | { |
a5d107f3 RS |
266 | unlock_file (scorefile, lockstate); |
267 | lose_syserr ("Failed to write scores file"); | |
2f1de3dd | 268 | } |
a5d107f3 | 269 | unlock_file (scorefile, lockstate); |
65396510 | 270 | exit (EXIT_SUCCESS); |
2f1de3dd CW |
271 | } |
272 | ||
273 | int | |
a5d107f3 | 274 | read_score (f, score) |
cf398788 CW |
275 | FILE *f; |
276 | struct score_entry *score; | |
2f1de3dd CW |
277 | { |
278 | int c; | |
a5d107f3 | 279 | if (feof (f)) |
2f1de3dd | 280 | return 1; |
a5d107f3 RS |
281 | while ((c = getc (f)) != EOF |
282 | && isdigit (c)) | |
cd553ffb CW |
283 | { |
284 | score->score *= 10; | |
285 | score->score += (c-48); | |
286 | } | |
a5d107f3 RS |
287 | while ((c = getc (f)) != EOF |
288 | && isspace (c)) | |
cd553ffb CW |
289 | ; |
290 | if (c == EOF) | |
291 | return -1; | |
a5d107f3 | 292 | ungetc (c, f); |
cd553ffb CW |
293 | #ifdef HAVE_GETDELIM |
294 | { | |
7605f1bd | 295 | size_t count = 0; |
a5d107f3 | 296 | if (getdelim (&score->username, &count, ' ', f) < 1 |
cd553ffb CW |
297 | || score->username == NULL) |
298 | return -1; | |
1d4328ff | 299 | /* Trim the space */ |
a5d107f3 | 300 | score->username[strlen (score->username)-1] = '\0'; |
2f1de3dd | 301 | } |
cd553ffb CW |
302 | #else |
303 | { | |
304 | int unameread = 0; | |
305 | int unamelen = 30; | |
a5d107f3 | 306 | char *username = malloc (unamelen); |
f5bceaf8 CW |
307 | if (!username) |
308 | return -1; | |
177c0ea7 | 309 | |
a5d107f3 RS |
310 | while ((c = getc (f)) != EOF |
311 | && !isspace (c)) | |
cd553ffb | 312 | { |
8eec804f | 313 | if (unameread >= unamelen-1) |
a5d107f3 | 314 | if (!(username = realloc (username, unamelen *= 2))) |
8eec804f | 315 | return -1; |
cd553ffb CW |
316 | username[unameread] = c; |
317 | unameread++; | |
318 | } | |
177c0ea7 | 319 | if (c == EOF) |
f5bceaf8 CW |
320 | return -1; |
321 | username[unameread] = '\0'; | |
cd553ffb CW |
322 | score->username = username; |
323 | } | |
324 | #endif | |
2f1de3dd CW |
325 | #ifdef HAVE_GETLINE |
326 | score->data = NULL; | |
7605f1bd | 327 | errno = 0; |
2f1de3dd | 328 | { |
7605f1bd | 329 | size_t len; |
a5d107f3 | 330 | if (getline (&score->data, &len, f) < 0) |
2f1de3dd | 331 | return -1; |
a5d107f3 | 332 | score->data[strlen (score->data)-1] = '\0'; |
2f1de3dd CW |
333 | } |
334 | #else | |
cd553ffb CW |
335 | { |
336 | int cur = 0; | |
337 | int len = 16; | |
a5d107f3 | 338 | char *buf = malloc (len); |
cd553ffb CW |
339 | if (!buf) |
340 | return -1; | |
a5d107f3 | 341 | while ((c = getc (f)) != EOF |
f5bceaf8 | 342 | && c != '\n') |
cd553ffb CW |
343 | { |
344 | if (cur >= len-1) | |
345 | { | |
a5d107f3 | 346 | if (!(buf = realloc (buf, len *= 2))) |
cd553ffb CW |
347 | return -1; |
348 | } | |
349 | buf[cur] = c; | |
350 | cur++; | |
351 | } | |
352 | score->data = buf; | |
5795b420 | 353 | score->data[cur] = '\0'; |
cd553ffb | 354 | } |
2f1de3dd | 355 | #endif |
2f1de3dd CW |
356 | return 0; |
357 | } | |
358 | ||
359 | int | |
a5d107f3 | 360 | read_scores (filename, scores, count) |
cf398788 CW |
361 | const char *filename; |
362 | struct score_entry **scores; | |
363 | int *count; | |
2f1de3dd CW |
364 | { |
365 | int readval, scorecount, cursize; | |
366 | struct score_entry *ret; | |
a5d107f3 | 367 | FILE *f = fopen (filename, "r"); |
177c0ea7 | 368 | if (!f) |
2f1de3dd CW |
369 | return -1; |
370 | scorecount = 0; | |
371 | cursize = 16; | |
00a7e408 | 372 | ret = (struct score_entry *) malloc (sizeof (struct score_entry) * cursize); |
177c0ea7 | 373 | if (!ret) |
2f1de3dd | 374 | return -1; |
a5d107f3 | 375 | while ((readval = read_score (f, &ret[scorecount])) == 0) |
2f1de3dd CW |
376 | { |
377 | /* We encoutered an error */ | |
378 | if (readval < 0) | |
379 | return -1; | |
380 | scorecount++; | |
381 | if (scorecount >= cursize) | |
382 | { | |
ee435bae JB |
383 | cursize *= 2; |
384 | ret = (struct score_entry *) | |
385 | realloc (ret, (sizeof (struct score_entry) * cursize)); | |
2f1de3dd CW |
386 | if (!ret) |
387 | return -1; | |
388 | } | |
389 | } | |
390 | *count = scorecount; | |
391 | *scores = ret; | |
392 | return 0; | |
393 | } | |
394 | ||
395 | int | |
a5d107f3 | 396 | score_compare (a, b) |
cf398788 CW |
397 | const void *a; |
398 | const void *b; | |
2f1de3dd CW |
399 | { |
400 | const struct score_entry *sa = (const struct score_entry *) a; | |
401 | const struct score_entry *sb = (const struct score_entry *) b; | |
402 | return (sb->score > sa->score) - (sb->score < sa->score); | |
403 | } | |
404 | ||
405 | int | |
a5d107f3 | 406 | score_compare_reverse (a, b) |
cf398788 CW |
407 | const void *a; |
408 | const void *b; | |
2f1de3dd CW |
409 | { |
410 | const struct score_entry *sa = (const struct score_entry *) a; | |
411 | const struct score_entry *sb = (const struct score_entry *) b; | |
412 | return (sa->score > sb->score) - (sa->score < sb->score); | |
413 | } | |
414 | ||
415 | int | |
177c0ea7 | 416 | push_score (scores, count, newscore, username, newdata) |
cf398788 CW |
417 | struct score_entry **scores; |
418 | int *count; int newscore; | |
419 | char *username; | |
420 | char *newdata; | |
2f1de3dd | 421 | { |
a5d107f3 | 422 | struct score_entry *newscores |
00a7e408 RS |
423 | = (struct score_entry *) realloc (*scores, |
424 | sizeof (struct score_entry) * ((*count) + 1)); | |
2f1de3dd CW |
425 | if (!newscores) |
426 | return -1; | |
427 | newscores[*count].score = newscore; | |
cd553ffb | 428 | newscores[*count].username = username; |
2f1de3dd CW |
429 | newscores[*count].data = newdata; |
430 | (*count) += 1; | |
431 | *scores = newscores; | |
432 | return 0; | |
433 | } | |
177c0ea7 | 434 | |
2f1de3dd | 435 | void |
a5d107f3 | 436 | sort_scores (scores, count, reverse) |
cf398788 CW |
437 | struct score_entry *scores; |
438 | int count; | |
177c0ea7 | 439 | int reverse; |
2f1de3dd | 440 | { |
a5d107f3 | 441 | qsort (scores, count, sizeof (struct score_entry), |
2f1de3dd CW |
442 | reverse ? score_compare_reverse : score_compare); |
443 | } | |
444 | ||
445 | int | |
a5d107f3 | 446 | write_scores (filename, scores, count) |
cf398788 CW |
447 | const char *filename; |
448 | const struct score_entry * scores; | |
177c0ea7 | 449 | int count; |
2f1de3dd | 450 | { |
177c0ea7 | 451 | FILE *f; |
2f1de3dd | 452 | int i; |
a5d107f3 | 453 | char *tempfile = malloc (strlen (filename) + strlen (".tempXXXXXX") + 1); |
2f1de3dd CW |
454 | if (!tempfile) |
455 | return -1; | |
a5d107f3 RS |
456 | strcpy (tempfile, filename); |
457 | strcat (tempfile, ".tempXXXXXX"); | |
8eec804f | 458 | #ifdef HAVE_MKSTEMP |
a5d107f3 | 459 | if (mkstemp (tempfile) < 0 |
8eec804f | 460 | #else |
a5d107f3 | 461 | if (mktemp (tempfile) != tempfile |
8eec804f | 462 | #endif |
a5d107f3 | 463 | || !(f = fopen (tempfile, "w"))) |
2f1de3dd CW |
464 | return -1; |
465 | for (i = 0; i < count; i++) | |
a5d107f3 | 466 | if (fprintf (f, "%ld %s %s\n", scores[i].score, scores[i].username, |
cd553ffb | 467 | scores[i].data) < 0) |
2f1de3dd | 468 | return -1; |
a5d107f3 RS |
469 | fclose (f); |
470 | if (rename (tempfile, filename) < 0) | |
2f1de3dd | 471 | return -1; |
a5d107f3 | 472 | if (chmod (filename, 0644) < 0) |
2f1de3dd | 473 | return -1; |
8eec804f | 474 | return 0; |
2f1de3dd | 475 | } |
177c0ea7 | 476 | |
2f1de3dd | 477 | int |
a5d107f3 | 478 | lock_file (filename, state) |
cf398788 CW |
479 | const char *filename; |
480 | void **state; | |
2f1de3dd CW |
481 | { |
482 | int fd; | |
7c4f6873 | 483 | struct stat buf; |
2f1de3dd CW |
484 | int attempts = 0; |
485 | char *lockext = ".lockfile"; | |
a5d107f3 | 486 | char *lockpath = malloc (strlen (filename) + strlen (lockext) + 60); |
2f1de3dd CW |
487 | if (!lockpath) |
488 | return -1; | |
a5d107f3 RS |
489 | strcpy (lockpath, filename); |
490 | strcat (lockpath, lockext); | |
2f1de3dd CW |
491 | *state = lockpath; |
492 | trylock: | |
493 | attempts++; | |
7c4f6873 | 494 | /* If the lock is over an hour old, delete it. */ |
a5d107f3 RS |
495 | if (stat (lockpath, &buf) == 0 |
496 | && (difftime (buf.st_ctime, time (NULL) > 60*60))) | |
497 | unlink (lockpath); | |
00a7e408 RS |
498 | fd = open (lockpath, O_CREAT | O_EXCL, 0600); |
499 | if (fd < 0) | |
2f1de3dd CW |
500 | { |
501 | if (errno == EEXIST) | |
502 | { | |
503 | /* Break the lock; we won't corrupt the file, but we might | |
504 | lose some scores. */ | |
505 | if (attempts > MAX_ATTEMPTS) | |
7c4f6873 | 506 | { |
a5d107f3 | 507 | unlink (lockpath); |
7c4f6873 CW |
508 | attempts = 0; |
509 | } | |
a5d107f3 | 510 | sleep ((rand () % 2)+1); |
2f1de3dd CW |
511 | goto trylock; |
512 | } | |
513 | else | |
514 | return -1; | |
515 | } | |
a5d107f3 | 516 | close (fd); |
2f1de3dd CW |
517 | return 0; |
518 | } | |
177c0ea7 | 519 | |
2f1de3dd | 520 | int |
a5d107f3 | 521 | unlock_file (filename, state) |
cf398788 CW |
522 | const char *filename; |
523 | void *state; | |
2f1de3dd CW |
524 | { |
525 | char *lockpath = (char *) state; | |
a5d107f3 | 526 | int ret = unlink (lockpath); |
2f1de3dd | 527 | int saved_errno = errno; |
a5d107f3 | 528 | free (lockpath); |
2f1de3dd CW |
529 | errno = saved_errno; |
530 | return ret; | |
531 | } | |
ab5796a9 MB |
532 | |
533 | /* arch-tag: 2bf5c52e-4beb-463a-954e-c58b9c64736b | |
534 | (do not change this comment) */ | |
65396510 TTN |
535 | |
536 | /* update-game-score.c ends here */ |