Commit | Line | Data |
---|---|---|
2f1de3dd | 1 | /* update-game-score.c --- Update a score file |
294981c7 GM |
2 | |
3 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 | |
4 | Free Software Foundation, Inc. | |
5 | ||
6 | Author: Colin Walters <walters@debian.org> | |
2f1de3dd CW |
7 | |
8 | This file is part of GNU Emacs. | |
9 | ||
294981c7 | 10 | GNU Emacs is free software: you can redistribute it and/or modify |
2f1de3dd | 11 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
12 | the Free Software Foundation, either version 3 of the License, or |
13 | (at your option) any later version. | |
2f1de3dd CW |
14 | |
15 | GNU Emacs is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
294981c7 GM |
21 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
22 | ||
2f1de3dd CW |
23 | |
24 | /* This program is allows a game to securely and atomically update a | |
8eec804f CW |
25 | score file. It should be installed setuid, owned by an appropriate |
26 | user like `games'. | |
27 | ||
28 | Alternatively, it can be compiled without HAVE_SHARED_GAME_DIR | |
29 | defined, and in that case it will store scores in the user's home | |
30 | directory (it should NOT be setuid). | |
2f1de3dd | 31 | |
294981c7 | 32 | Created 2002/03/22. |
2f1de3dd CW |
33 | */ |
34 | ||
c42d6dbd EZ |
35 | #include <config.h> |
36 | ||
5b400482 | 37 | #ifdef HAVE_UNISTD_H |
2f1de3dd | 38 | #include <unistd.h> |
5b400482 | 39 | #endif |
2f1de3dd | 40 | #include <errno.h> |
5b400482 | 41 | #ifdef HAVE_STRING_H |
2f1de3dd | 42 | #include <string.h> |
5b400482 DL |
43 | #endif |
44 | #ifdef HAVE_STDLIB_H | |
2f1de3dd | 45 | #include <stdlib.h> |
5b400482 | 46 | #endif |
2f1de3dd CW |
47 | #include <stdio.h> |
48 | #include <time.h> | |
cd553ffb | 49 | #include <pwd.h> |
2f1de3dd | 50 | #include <ctype.h> |
5b400482 | 51 | #ifdef HAVE_FCNTL_H |
2f1de3dd | 52 | #include <fcntl.h> |
5b400482 DL |
53 | #endif |
54 | #ifdef STDC_HEADERS | |
8eec804f | 55 | #include <stdarg.h> |
5b400482 | 56 | #endif |
2f1de3dd | 57 | #include <sys/stat.h> |
2f1de3dd | 58 | |
5b400482 DL |
59 | /* Needed for SunOS4, for instance. */ |
60 | extern char *optarg; | |
61 | extern int optind, opterr; | |
62 | ||
2f1de3dd | 63 | #define MAX_ATTEMPTS 5 |
8eec804f CW |
64 | #define MAX_SCORES 200 |
65 | #define MAX_DATA_LEN 1024 | |
5795b420 | 66 | |
cf398788 CW |
67 | /* Declare the prototype for a general external function. */ |
68 | #if defined (PROTOTYPES) || defined (WINDOWSNT) | |
69 | #define P_(proto) proto | |
70 | #else | |
71 | #define P_(proto) () | |
72 | #endif | |
73 | ||
1d28afaf DL |
74 | #ifndef HAVE_DIFFTIME |
75 | /* OK on POSIX (time_t is arithmetic type) modulo overflow in subtraction. */ | |
76 | #define difftime(t1, t0) (double)((t1) - (t0)) | |
77 | #endif | |
78 | ||
2f1de3dd | 79 | int |
a5d107f3 | 80 | usage (err) |
cf398788 | 81 | int err; |
2f1de3dd | 82 | { |
a5d107f3 RS |
83 | fprintf (stdout, "Usage: update-game-score [-m MAX ] [ -r ] game/scorefile SCORE DATA\n"); |
84 | fprintf (stdout, " update-game-score -h\n"); | |
85 | fprintf (stdout, " -h\t\tDisplay this help.\n"); | |
86 | fprintf (stdout, " -m MAX\t\tLimit the maximum number of scores to MAX.\n"); | |
87 | fprintf (stdout, " -r\t\tSort the scores in increasing order.\n"); | |
88 | fprintf (stdout, " -d DIR\t\tStore scores in DIR (only if not setuid).\n"); | |
89 | exit (err); | |
2f1de3dd CW |
90 | } |
91 | ||
a5d107f3 RS |
92 | int lock_file P_ ((const char *filename, void **state)); |
93 | int unlock_file P_ ((const char *filename, void *state)); | |
2f1de3dd CW |
94 | |
95 | struct score_entry | |
96 | { | |
97 | long score; | |
cd553ffb | 98 | char *username; |
2f1de3dd CW |
99 | char *data; |
100 | }; | |
101 | ||
a5d107f3 RS |
102 | int read_scores P_ ((const char *filename, struct score_entry **scores, |
103 | int *count)); | |
104 | int push_score P_ ((struct score_entry **scores, int *count, | |
105 | int newscore, char *username, char *newdata)); | |
106 | void sort_scores P_ ((struct score_entry *scores, int count, int reverse)); | |
107 | int write_scores P_ ((const char *filename, const struct score_entry *scores, | |
108 | int count)); | |
cf398788 | 109 | |
a5d107f3 | 110 | void lose P_ ((const char *msg)) NO_RETURN; |
cf398788 | 111 | |
a5d107f3 RS |
112 | void |
113 | lose (msg) | |
cf398788 CW |
114 | const char *msg; |
115 | { | |
a5d107f3 | 116 | fprintf (stderr, "%s\n", msg); |
65396510 | 117 | exit (EXIT_FAILURE); |
cf398788 | 118 | } |
2f1de3dd | 119 | |
a5d107f3 | 120 | void lose_syserr P_ ((const char *msg)) NO_RETURN; |
d99fabf0 | 121 | |
1d28afaf DL |
122 | /* Taken from sysdep.c. */ |
123 | #ifndef HAVE_STRERROR | |
124 | #ifndef WINDOWSNT | |
125 | char * | |
126 | strerror (errnum) | |
127 | int errnum; | |
128 | { | |
129 | extern char *sys_errlist[]; | |
130 | extern int sys_nerr; | |
131 | ||
132 | if (errnum >= 0 && errnum < sys_nerr) | |
133 | return sys_errlist[errnum]; | |
134 | return (char *) "Unknown error"; | |
135 | } | |
136 | #endif /* not WINDOWSNT */ | |
137 | #endif /* ! HAVE_STRERROR */ | |
138 | ||
a5d107f3 RS |
139 | void |
140 | lose_syserr (msg) | |
cf398788 | 141 | const char *msg; |
d99fabf0 | 142 | { |
a5d107f3 | 143 | fprintf (stderr, "%s: %s\n", msg, strerror (errno)); |
65396510 | 144 | exit (EXIT_FAILURE); |
d99fabf0 CW |
145 | } |
146 | ||
cd553ffb | 147 | char * |
5b400482 | 148 | get_user_id P_ ((void)) |
cd553ffb CW |
149 | { |
150 | char *name; | |
a5d107f3 | 151 | struct passwd *buf = getpwuid (getuid ()); |
cd553ffb CW |
152 | if (!buf) |
153 | { | |
154 | int count = 1; | |
a5d107f3 | 155 | int uid = (int) getuid (); |
8eec804f CW |
156 | int tuid = uid; |
157 | while (tuid /= 10) | |
cd553ffb | 158 | count++; |
a5d107f3 | 159 | name = malloc (count+1); |
d99fabf0 CW |
160 | if (!name) |
161 | return NULL; | |
a5d107f3 | 162 | sprintf (name, "%d", uid); |
cd553ffb CW |
163 | return name; |
164 | } | |
165 | return buf->pw_name; | |
166 | } | |
167 | ||
5795b420 | 168 | char * |
a5d107f3 | 169 | get_prefix (running_suid, user_prefix) |
cf398788 CW |
170 | int running_suid; |
171 | char *user_prefix; | |
8eec804f | 172 | { |
d99fabf0 | 173 | if (!running_suid && user_prefix == NULL) |
a5d107f3 | 174 | lose ("Not using a shared game directory, and no prefix given."); |
d99fabf0 CW |
175 | if (running_suid) |
176 | { | |
177 | #ifdef HAVE_SHARED_GAME_DIR | |
178 | return HAVE_SHARED_GAME_DIR; | |
179 | #else | |
a5d107f3 | 180 | lose ("This program was compiled without HAVE_SHARED_GAME_DIR,\n and should not be suid."); |
d99fabf0 CW |
181 | #endif |
182 | } | |
183 | return user_prefix; | |
8eec804f CW |
184 | } |
185 | ||
2f1de3dd | 186 | int |
a5d107f3 | 187 | main (argc, argv) |
cf398788 CW |
188 | int argc; |
189 | char **argv; | |
2f1de3dd | 190 | { |
d99fabf0 | 191 | int c, running_suid; |
2f1de3dd | 192 | void *lockstate; |
d99fabf0 | 193 | char *user_id, *scorefile, *prefix, *user_prefix = NULL; |
2f1de3dd CW |
194 | struct stat buf; |
195 | struct score_entry *scores; | |
8eec804f | 196 | int newscore, scorecount, reverse = 0, max = MAX_SCORES; |
2f1de3dd CW |
197 | char *newdata; |
198 | ||
a5d107f3 | 199 | srand (time (0)); |
2f1de3dd | 200 | |
a5d107f3 | 201 | while ((c = getopt (argc, argv, "hrm:d:")) != -1) |
2f1de3dd CW |
202 | switch (c) |
203 | { | |
204 | case 'h': | |
65396510 | 205 | usage (EXIT_SUCCESS); |
2f1de3dd | 206 | break; |
d99fabf0 CW |
207 | case 'd': |
208 | user_prefix = optarg; | |
209 | break; | |
2f1de3dd CW |
210 | case 'r': |
211 | reverse = 1; | |
212 | break; | |
213 | case 'm': | |
a5d107f3 | 214 | max = atoi (optarg); |
8eec804f CW |
215 | if (max > MAX_SCORES) |
216 | max = MAX_SCORES; | |
2f1de3dd CW |
217 | break; |
218 | default: | |
65396510 | 219 | usage (EXIT_FAILURE); |
2f1de3dd CW |
220 | } |
221 | ||
222 | if (optind+3 != argc) | |
65396510 | 223 | usage (EXIT_FAILURE); |
5795b420 | 224 | |
a5d107f3 | 225 | running_suid = (getuid () != geteuid ()); |
5795b420 | 226 | |
a5d107f3 | 227 | prefix = get_prefix (running_suid, user_prefix); |
8eec804f | 228 | |
a5d107f3 | 229 | scorefile = malloc (strlen (prefix) + strlen (argv[optind]) + 2); |
2f1de3dd | 230 | if (!scorefile) |
a5d107f3 | 231 | lose_syserr ("Couldn't allocate score file"); |
8eec804f | 232 | |
a5d107f3 RS |
233 | strcpy (scorefile, prefix); |
234 | strcat (scorefile, "/"); | |
235 | strcat (scorefile, argv[optind]); | |
236 | newscore = atoi (argv[optind+1]); | |
2f1de3dd | 237 | newdata = argv[optind+2]; |
a5d107f3 | 238 | if (strlen (newdata) > MAX_DATA_LEN) |
8eec804f | 239 | newdata[MAX_DATA_LEN] = '\0'; |
d99fabf0 | 240 | |
00a7e408 RS |
241 | user_id = get_user_id (); |
242 | if (user_id == NULL) | |
a5d107f3 | 243 | lose_syserr ("Couldn't determine user id"); |
177c0ea7 | 244 | |
a5d107f3 RS |
245 | if (stat (scorefile, &buf) < 0) |
246 | lose_syserr ("Failed to access scores file"); | |
177c0ea7 | 247 | |
a5d107f3 RS |
248 | if (lock_file (scorefile, &lockstate) < 0) |
249 | lose_syserr ("Failed to lock scores file"); | |
177c0ea7 | 250 | |
a5d107f3 | 251 | if (read_scores (scorefile, &scores, &scorecount) < 0) |
2f1de3dd | 252 | { |
a5d107f3 RS |
253 | unlock_file (scorefile, lockstate); |
254 | lose_syserr ("Failed to read scores file"); | |
2f1de3dd | 255 | } |
a5d107f3 | 256 | push_score (&scores, &scorecount, newscore, user_id, newdata); |
8eec804f CW |
257 | /* Limit the number of scores. If we're using reverse sorting, then |
258 | we should increment the beginning of the array, to skip over the | |
259 | *smallest* scores. Otherwise, we just decrement the number of | |
260 | scores, since the smallest will be at the end. */ | |
261 | if (scorecount > MAX_SCORES) | |
262 | scorecount -= (scorecount - MAX_SCORES); | |
263 | if (reverse) | |
264 | scores += (scorecount - MAX_SCORES); | |
a5d107f3 RS |
265 | sort_scores (scores, scorecount, reverse); |
266 | if (write_scores (scorefile, scores, scorecount) < 0) | |
2f1de3dd | 267 | { |
a5d107f3 RS |
268 | unlock_file (scorefile, lockstate); |
269 | lose_syserr ("Failed to write scores file"); | |
2f1de3dd | 270 | } |
a5d107f3 | 271 | unlock_file (scorefile, lockstate); |
65396510 | 272 | exit (EXIT_SUCCESS); |
2f1de3dd CW |
273 | } |
274 | ||
275 | int | |
a5d107f3 | 276 | read_score (f, score) |
cf398788 CW |
277 | FILE *f; |
278 | struct score_entry *score; | |
2f1de3dd CW |
279 | { |
280 | int c; | |
a5d107f3 | 281 | if (feof (f)) |
2f1de3dd | 282 | return 1; |
a5d107f3 RS |
283 | while ((c = getc (f)) != EOF |
284 | && isdigit (c)) | |
cd553ffb CW |
285 | { |
286 | score->score *= 10; | |
287 | score->score += (c-48); | |
288 | } | |
a5d107f3 RS |
289 | while ((c = getc (f)) != EOF |
290 | && isspace (c)) | |
cd553ffb CW |
291 | ; |
292 | if (c == EOF) | |
293 | return -1; | |
a5d107f3 | 294 | ungetc (c, f); |
cd553ffb CW |
295 | #ifdef HAVE_GETDELIM |
296 | { | |
7605f1bd | 297 | size_t count = 0; |
a5d107f3 | 298 | if (getdelim (&score->username, &count, ' ', f) < 1 |
cd553ffb CW |
299 | || score->username == NULL) |
300 | return -1; | |
1d4328ff | 301 | /* Trim the space */ |
a5d107f3 | 302 | score->username[strlen (score->username)-1] = '\0'; |
2f1de3dd | 303 | } |
cd553ffb CW |
304 | #else |
305 | { | |
306 | int unameread = 0; | |
307 | int unamelen = 30; | |
a5d107f3 | 308 | char *username = malloc (unamelen); |
f5bceaf8 CW |
309 | if (!username) |
310 | return -1; | |
177c0ea7 | 311 | |
a5d107f3 RS |
312 | while ((c = getc (f)) != EOF |
313 | && !isspace (c)) | |
cd553ffb | 314 | { |
8eec804f | 315 | if (unameread >= unamelen-1) |
a5d107f3 | 316 | if (!(username = realloc (username, unamelen *= 2))) |
8eec804f | 317 | return -1; |
cd553ffb CW |
318 | username[unameread] = c; |
319 | unameread++; | |
320 | } | |
177c0ea7 | 321 | if (c == EOF) |
f5bceaf8 CW |
322 | return -1; |
323 | username[unameread] = '\0'; | |
cd553ffb CW |
324 | score->username = username; |
325 | } | |
326 | #endif | |
2f1de3dd CW |
327 | #ifdef HAVE_GETLINE |
328 | score->data = NULL; | |
7605f1bd | 329 | errno = 0; |
2f1de3dd | 330 | { |
7605f1bd | 331 | size_t len; |
a5d107f3 | 332 | if (getline (&score->data, &len, f) < 0) |
2f1de3dd | 333 | return -1; |
a5d107f3 | 334 | score->data[strlen (score->data)-1] = '\0'; |
2f1de3dd CW |
335 | } |
336 | #else | |
cd553ffb CW |
337 | { |
338 | int cur = 0; | |
339 | int len = 16; | |
a5d107f3 | 340 | char *buf = malloc (len); |
cd553ffb CW |
341 | if (!buf) |
342 | return -1; | |
a5d107f3 | 343 | while ((c = getc (f)) != EOF |
f5bceaf8 | 344 | && c != '\n') |
cd553ffb CW |
345 | { |
346 | if (cur >= len-1) | |
347 | { | |
a5d107f3 | 348 | if (!(buf = realloc (buf, len *= 2))) |
cd553ffb CW |
349 | return -1; |
350 | } | |
351 | buf[cur] = c; | |
352 | cur++; | |
353 | } | |
354 | score->data = buf; | |
5795b420 | 355 | score->data[cur] = '\0'; |
cd553ffb | 356 | } |
2f1de3dd | 357 | #endif |
2f1de3dd CW |
358 | return 0; |
359 | } | |
360 | ||
361 | int | |
a5d107f3 | 362 | read_scores (filename, scores, count) |
cf398788 CW |
363 | const char *filename; |
364 | struct score_entry **scores; | |
365 | int *count; | |
2f1de3dd CW |
366 | { |
367 | int readval, scorecount, cursize; | |
368 | struct score_entry *ret; | |
a5d107f3 | 369 | FILE *f = fopen (filename, "r"); |
177c0ea7 | 370 | if (!f) |
2f1de3dd CW |
371 | return -1; |
372 | scorecount = 0; | |
373 | cursize = 16; | |
00a7e408 | 374 | ret = (struct score_entry *) malloc (sizeof (struct score_entry) * cursize); |
177c0ea7 | 375 | if (!ret) |
2f1de3dd | 376 | return -1; |
a5d107f3 | 377 | while ((readval = read_score (f, &ret[scorecount])) == 0) |
2f1de3dd CW |
378 | { |
379 | /* We encoutered an error */ | |
380 | if (readval < 0) | |
381 | return -1; | |
382 | scorecount++; | |
383 | if (scorecount >= cursize) | |
384 | { | |
ee435bae JB |
385 | cursize *= 2; |
386 | ret = (struct score_entry *) | |
387 | realloc (ret, (sizeof (struct score_entry) * cursize)); | |
2f1de3dd CW |
388 | if (!ret) |
389 | return -1; | |
390 | } | |
391 | } | |
392 | *count = scorecount; | |
393 | *scores = ret; | |
394 | return 0; | |
395 | } | |
396 | ||
397 | int | |
a5d107f3 | 398 | score_compare (a, b) |
cf398788 CW |
399 | const void *a; |
400 | const void *b; | |
2f1de3dd CW |
401 | { |
402 | const struct score_entry *sa = (const struct score_entry *) a; | |
403 | const struct score_entry *sb = (const struct score_entry *) b; | |
404 | return (sb->score > sa->score) - (sb->score < sa->score); | |
405 | } | |
406 | ||
407 | int | |
a5d107f3 | 408 | score_compare_reverse (a, b) |
cf398788 CW |
409 | const void *a; |
410 | const void *b; | |
2f1de3dd CW |
411 | { |
412 | const struct score_entry *sa = (const struct score_entry *) a; | |
413 | const struct score_entry *sb = (const struct score_entry *) b; | |
414 | return (sa->score > sb->score) - (sa->score < sb->score); | |
415 | } | |
416 | ||
417 | int | |
177c0ea7 | 418 | push_score (scores, count, newscore, username, newdata) |
cf398788 CW |
419 | struct score_entry **scores; |
420 | int *count; int newscore; | |
421 | char *username; | |
422 | char *newdata; | |
2f1de3dd | 423 | { |
a5d107f3 | 424 | struct score_entry *newscores |
00a7e408 RS |
425 | = (struct score_entry *) realloc (*scores, |
426 | sizeof (struct score_entry) * ((*count) + 1)); | |
2f1de3dd CW |
427 | if (!newscores) |
428 | return -1; | |
429 | newscores[*count].score = newscore; | |
cd553ffb | 430 | newscores[*count].username = username; |
2f1de3dd CW |
431 | newscores[*count].data = newdata; |
432 | (*count) += 1; | |
433 | *scores = newscores; | |
434 | return 0; | |
435 | } | |
177c0ea7 | 436 | |
2f1de3dd | 437 | void |
a5d107f3 | 438 | sort_scores (scores, count, reverse) |
cf398788 CW |
439 | struct score_entry *scores; |
440 | int count; | |
177c0ea7 | 441 | int reverse; |
2f1de3dd | 442 | { |
a5d107f3 | 443 | qsort (scores, count, sizeof (struct score_entry), |
2f1de3dd CW |
444 | reverse ? score_compare_reverse : score_compare); |
445 | } | |
446 | ||
447 | int | |
a5d107f3 | 448 | write_scores (filename, scores, count) |
cf398788 CW |
449 | const char *filename; |
450 | const struct score_entry * scores; | |
177c0ea7 | 451 | int count; |
2f1de3dd | 452 | { |
177c0ea7 | 453 | FILE *f; |
2f1de3dd | 454 | int i; |
a5d107f3 | 455 | char *tempfile = malloc (strlen (filename) + strlen (".tempXXXXXX") + 1); |
2f1de3dd CW |
456 | if (!tempfile) |
457 | return -1; | |
a5d107f3 RS |
458 | strcpy (tempfile, filename); |
459 | strcat (tempfile, ".tempXXXXXX"); | |
8eec804f | 460 | #ifdef HAVE_MKSTEMP |
a5d107f3 | 461 | if (mkstemp (tempfile) < 0 |
8eec804f | 462 | #else |
a5d107f3 | 463 | if (mktemp (tempfile) != tempfile |
8eec804f | 464 | #endif |
a5d107f3 | 465 | || !(f = fopen (tempfile, "w"))) |
2f1de3dd CW |
466 | return -1; |
467 | for (i = 0; i < count; i++) | |
a5d107f3 | 468 | if (fprintf (f, "%ld %s %s\n", scores[i].score, scores[i].username, |
cd553ffb | 469 | scores[i].data) < 0) |
2f1de3dd | 470 | return -1; |
a5d107f3 RS |
471 | fclose (f); |
472 | if (rename (tempfile, filename) < 0) | |
2f1de3dd | 473 | return -1; |
a5d107f3 | 474 | if (chmod (filename, 0644) < 0) |
2f1de3dd | 475 | return -1; |
8eec804f | 476 | return 0; |
2f1de3dd | 477 | } |
177c0ea7 | 478 | |
2f1de3dd | 479 | int |
a5d107f3 | 480 | lock_file (filename, state) |
cf398788 CW |
481 | const char *filename; |
482 | void **state; | |
2f1de3dd CW |
483 | { |
484 | int fd; | |
7c4f6873 | 485 | struct stat buf; |
2f1de3dd CW |
486 | int attempts = 0; |
487 | char *lockext = ".lockfile"; | |
a5d107f3 | 488 | char *lockpath = malloc (strlen (filename) + strlen (lockext) + 60); |
2f1de3dd CW |
489 | if (!lockpath) |
490 | return -1; | |
a5d107f3 RS |
491 | strcpy (lockpath, filename); |
492 | strcat (lockpath, lockext); | |
2f1de3dd CW |
493 | *state = lockpath; |
494 | trylock: | |
495 | attempts++; | |
7c4f6873 | 496 | /* If the lock is over an hour old, delete it. */ |
a5d107f3 RS |
497 | if (stat (lockpath, &buf) == 0 |
498 | && (difftime (buf.st_ctime, time (NULL) > 60*60))) | |
499 | unlink (lockpath); | |
00a7e408 RS |
500 | fd = open (lockpath, O_CREAT | O_EXCL, 0600); |
501 | if (fd < 0) | |
2f1de3dd CW |
502 | { |
503 | if (errno == EEXIST) | |
504 | { | |
505 | /* Break the lock; we won't corrupt the file, but we might | |
506 | lose some scores. */ | |
507 | if (attempts > MAX_ATTEMPTS) | |
7c4f6873 | 508 | { |
a5d107f3 | 509 | unlink (lockpath); |
7c4f6873 CW |
510 | attempts = 0; |
511 | } | |
a5d107f3 | 512 | sleep ((rand () % 2)+1); |
2f1de3dd CW |
513 | goto trylock; |
514 | } | |
515 | else | |
516 | return -1; | |
517 | } | |
a5d107f3 | 518 | close (fd); |
2f1de3dd CW |
519 | return 0; |
520 | } | |
177c0ea7 | 521 | |
2f1de3dd | 522 | int |
a5d107f3 | 523 | unlock_file (filename, state) |
cf398788 CW |
524 | const char *filename; |
525 | void *state; | |
2f1de3dd CW |
526 | { |
527 | char *lockpath = (char *) state; | |
a5d107f3 | 528 | int ret = unlink (lockpath); |
2f1de3dd | 529 | int saved_errno = errno; |
a5d107f3 | 530 | free (lockpath); |
2f1de3dd CW |
531 | errno = saved_errno; |
532 | return ret; | |
533 | } | |
ab5796a9 MB |
534 | |
535 | /* arch-tag: 2bf5c52e-4beb-463a-954e-c58b9c64736b | |
536 | (do not change this comment) */ | |
65396510 TTN |
537 | |
538 | /* update-game-score.c ends here */ |