Commit | Line | Data |
---|---|---|
2f1de3dd | 1 | /* update-game-score.c --- Update a score file |
294981c7 | 2 | |
ba318903 | 3 | Copyright (C) 2002-2014 Free Software Foundation, Inc. |
294981c7 GM |
4 | |
5 | Author: Colin Walters <walters@debian.org> | |
2f1de3dd CW |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
294981c7 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
2f1de3dd | 10 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
2f1de3dd CW |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
294981c7 GM |
20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
21 | ||
2f1de3dd | 22 | |
89cc1591 | 23 | /* This program allows a game to securely and atomically update a |
8eec804f CW |
24 | score file. It should be installed setuid, owned by an appropriate |
25 | user like `games'. | |
26 | ||
27 | Alternatively, it can be compiled without HAVE_SHARED_GAME_DIR | |
28 | defined, and in that case it will store scores in the user's home | |
29 | directory (it should NOT be setuid). | |
2f1de3dd | 30 | |
294981c7 | 31 | Created 2002/03/22. |
2f1de3dd CW |
32 | */ |
33 | ||
c42d6dbd EZ |
34 | #include <config.h> |
35 | ||
2f1de3dd CW |
36 | #include <unistd.h> |
37 | #include <errno.h> | |
d70efef4 | 38 | #include <inttypes.h> |
0c6d656d | 39 | #include <limits.h> |
d70efef4 | 40 | #include <stdbool.h> |
2f1de3dd CW |
41 | #include <string.h> |
42 | #include <stdlib.h> | |
43 | #include <stdio.h> | |
44 | #include <time.h> | |
cd553ffb | 45 | #include <pwd.h> |
2f1de3dd CW |
46 | #include <ctype.h> |
47 | #include <fcntl.h> | |
48 | #include <sys/stat.h> | |
15142f27 | 49 | #include <getopt.h> |
5b400482 | 50 | |
7c4026b6 EZ |
51 | #ifdef WINDOWSNT |
52 | #include "ntlib.h" | |
53 | #endif | |
54 | ||
d70efef4 PE |
55 | #ifndef min |
56 | # define min(a,b) ((a) < (b) ? (a) : (b)) | |
57 | #endif | |
58 | ||
2f1de3dd | 59 | #define MAX_ATTEMPTS 5 |
8eec804f | 60 | #define MAX_DATA_LEN 1024 |
5795b420 | 61 | |
1d28afaf DL |
62 | #ifndef HAVE_DIFFTIME |
63 | /* OK on POSIX (time_t is arithmetic type) modulo overflow in subtraction. */ | |
64 | #define difftime(t1, t0) (double)((t1) - (t0)) | |
65 | #endif | |
66 | ||
845ca893 | 67 | static _Noreturn void |
873fbd0b | 68 | usage (int err) |
2f1de3dd | 69 | { |
ec3b5374 | 70 | fprintf (stdout, "Usage: update-game-score [-m MAX] [-r] [-d DIR] game/scorefile SCORE DATA\n"); |
a5d107f3 RS |
71 | fprintf (stdout, " update-game-score -h\n"); |
72 | fprintf (stdout, " -h\t\tDisplay this help.\n"); | |
73 | fprintf (stdout, " -m MAX\t\tLimit the maximum number of scores to MAX.\n"); | |
74 | fprintf (stdout, " -r\t\tSort the scores in increasing order.\n"); | |
75 | fprintf (stdout, " -d DIR\t\tStore scores in DIR (only if not setuid).\n"); | |
76 | exit (err); | |
2f1de3dd CW |
77 | } |
78 | ||
b23b5a5b PE |
79 | static int lock_file (const char *filename, void **state); |
80 | static int unlock_file (const char *filename, void *state); | |
2f1de3dd CW |
81 | |
82 | struct score_entry | |
83 | { | |
d70efef4 | 84 | intmax_t score; |
cd553ffb | 85 | char *username; |
2f1de3dd CW |
86 | char *data; |
87 | }; | |
88 | ||
d70efef4 PE |
89 | #define MAX_SCORES min (PTRDIFF_MAX, SIZE_MAX / sizeof (struct score_entry)) |
90 | ||
b23b5a5b | 91 | static int read_scores (const char *filename, struct score_entry **scores, |
d70efef4 PE |
92 | ptrdiff_t *count, ptrdiff_t *alloc); |
93 | static int push_score (struct score_entry **scores, ptrdiff_t *count, | |
94 | ptrdiff_t *size, struct score_entry const *newscore); | |
95 | static void sort_scores (struct score_entry *scores, ptrdiff_t count, | |
96 | bool reverse); | |
b23b5a5b | 97 | static int write_scores (const char *filename, |
d70efef4 | 98 | const struct score_entry *scores, ptrdiff_t count); |
cf398788 | 99 | |
845ca893 | 100 | static _Noreturn void |
873fbd0b | 101 | lose (const char *msg) |
cf398788 | 102 | { |
a5d107f3 | 103 | fprintf (stderr, "%s\n", msg); |
65396510 | 104 | exit (EXIT_FAILURE); |
cf398788 | 105 | } |
2f1de3dd | 106 | |
845ca893 | 107 | static _Noreturn void |
873fbd0b | 108 | lose_syserr (const char *msg) |
d99fabf0 | 109 | { |
a5d107f3 | 110 | fprintf (stderr, "%s: %s\n", msg, strerror (errno)); |
65396510 | 111 | exit (EXIT_FAILURE); |
d99fabf0 CW |
112 | } |
113 | ||
b23b5a5b | 114 | static char * |
f57e2426 | 115 | get_user_id (void) |
cd553ffb | 116 | { |
a5d107f3 | 117 | struct passwd *buf = getpwuid (getuid ()); |
d70efef4 | 118 | if (!buf || strchr (buf->pw_name, ' ') || strchr (buf->pw_name, '\n')) |
cd553ffb | 119 | { |
d70efef4 PE |
120 | intmax_t uid = getuid (); |
121 | char *name = malloc (sizeof uid * CHAR_BIT / 3 + 4); | |
0c6d656d | 122 | if (name) |
d70efef4 | 123 | sprintf (name, "%"PRIdMAX, uid); |
cd553ffb CW |
124 | return name; |
125 | } | |
126 | return buf->pw_name; | |
127 | } | |
128 | ||
b23b5a5b | 129 | static const char * |
d70efef4 | 130 | get_prefix (bool running_suid, const char *user_prefix) |
8eec804f | 131 | { |
d99fabf0 | 132 | if (!running_suid && user_prefix == NULL) |
a5d107f3 | 133 | lose ("Not using a shared game directory, and no prefix given."); |
d99fabf0 CW |
134 | if (running_suid) |
135 | { | |
136 | #ifdef HAVE_SHARED_GAME_DIR | |
137 | return HAVE_SHARED_GAME_DIR; | |
138 | #else | |
a5d107f3 | 139 | lose ("This program was compiled without HAVE_SHARED_GAME_DIR,\n and should not be suid."); |
d99fabf0 CW |
140 | #endif |
141 | } | |
142 | return user_prefix; | |
8eec804f CW |
143 | } |
144 | ||
2f1de3dd | 145 | int |
873fbd0b | 146 | main (int argc, char **argv) |
2f1de3dd | 147 | { |
d70efef4 PE |
148 | int c; |
149 | bool running_suid; | |
2f1de3dd | 150 | void *lockstate; |
d70efef4 PE |
151 | char *scorefile; |
152 | char *nl; | |
988e88ab | 153 | const char *prefix, *user_prefix = NULL; |
2f1de3dd CW |
154 | struct stat buf; |
155 | struct score_entry *scores; | |
d70efef4 PE |
156 | struct score_entry newscore; |
157 | bool reverse = false; | |
158 | ptrdiff_t scorecount, scorealloc; | |
159 | ptrdiff_t max_scores = MAX_SCORES; | |
2f1de3dd | 160 | |
a5d107f3 | 161 | srand (time (0)); |
2f1de3dd | 162 | |
a5d107f3 | 163 | while ((c = getopt (argc, argv, "hrm:d:")) != -1) |
2f1de3dd CW |
164 | switch (c) |
165 | { | |
166 | case 'h': | |
65396510 | 167 | usage (EXIT_SUCCESS); |
2f1de3dd | 168 | break; |
d99fabf0 CW |
169 | case 'd': |
170 | user_prefix = optarg; | |
171 | break; | |
2f1de3dd CW |
172 | case 'r': |
173 | reverse = 1; | |
174 | break; | |
175 | case 'm': | |
d70efef4 PE |
176 | { |
177 | intmax_t m = strtoimax (optarg, 0, 10); | |
178 | if (m < 0) | |
179 | usage (EXIT_FAILURE); | |
180 | max_scores = min (m, MAX_SCORES); | |
181 | } | |
2f1de3dd CW |
182 | break; |
183 | default: | |
65396510 | 184 | usage (EXIT_FAILURE); |
2f1de3dd CW |
185 | } |
186 | ||
d70efef4 | 187 | if (argc - optind != 3) |
65396510 | 188 | usage (EXIT_FAILURE); |
5795b420 | 189 | |
a5d107f3 | 190 | running_suid = (getuid () != geteuid ()); |
5795b420 | 191 | |
a5d107f3 | 192 | prefix = get_prefix (running_suid, user_prefix); |
8eec804f | 193 | |
a5d107f3 | 194 | scorefile = malloc (strlen (prefix) + strlen (argv[optind]) + 2); |
2f1de3dd | 195 | if (!scorefile) |
a5d107f3 | 196 | lose_syserr ("Couldn't allocate score file"); |
8eec804f | 197 | |
a5d107f3 RS |
198 | strcpy (scorefile, prefix); |
199 | strcat (scorefile, "/"); | |
200 | strcat (scorefile, argv[optind]); | |
d99fabf0 | 201 | |
d70efef4 PE |
202 | newscore.score = strtoimax (argv[optind + 1], 0, 10); |
203 | ||
204 | newscore.data = argv[optind + 2]; | |
205 | if (strlen (newscore.data) > MAX_DATA_LEN) | |
206 | newscore.data[MAX_DATA_LEN] = '\0'; | |
207 | nl = strchr (newscore.data, '\n'); | |
208 | if (nl) | |
209 | *nl = '\0'; | |
210 | ||
211 | newscore.username = get_user_id (); | |
212 | if (! newscore.username) | |
a5d107f3 | 213 | lose_syserr ("Couldn't determine user id"); |
177c0ea7 | 214 | |
a5d107f3 RS |
215 | if (stat (scorefile, &buf) < 0) |
216 | lose_syserr ("Failed to access scores file"); | |
177c0ea7 | 217 | |
a5d107f3 RS |
218 | if (lock_file (scorefile, &lockstate) < 0) |
219 | lose_syserr ("Failed to lock scores file"); | |
177c0ea7 | 220 | |
d70efef4 | 221 | if (read_scores (scorefile, &scores, &scorecount, &scorealloc) < 0) |
2f1de3dd | 222 | { |
a5d107f3 RS |
223 | unlock_file (scorefile, lockstate); |
224 | lose_syserr ("Failed to read scores file"); | |
2f1de3dd | 225 | } |
d70efef4 PE |
226 | if (push_score (&scores, &scorecount, &scorealloc, &newscore) < 0) |
227 | { | |
228 | unlock_file (scorefile, lockstate); | |
229 | lose_syserr ("Failed to add score"); | |
230 | } | |
24e9e996 | 231 | sort_scores (scores, scorecount, reverse); |
8eec804f | 232 | /* Limit the number of scores. If we're using reverse sorting, then |
f0d80d43 PE |
233 | also increment the beginning of the array, to skip over the |
234 | *smallest* scores. Otherwise, just decrementing the number of | |
235 | scores suffices, since the smallest is at the end. */ | |
d70efef4 | 236 | if (scorecount > max_scores) |
f0d80d43 PE |
237 | { |
238 | if (reverse) | |
d70efef4 PE |
239 | scores += scorecount - max_scores; |
240 | scorecount = max_scores; | |
f0d80d43 | 241 | } |
a5d107f3 | 242 | if (write_scores (scorefile, scores, scorecount) < 0) |
2f1de3dd | 243 | { |
a5d107f3 RS |
244 | unlock_file (scorefile, lockstate); |
245 | lose_syserr ("Failed to write scores file"); | |
2f1de3dd | 246 | } |
d70efef4 PE |
247 | if (unlock_file (scorefile, lockstate) < 0) |
248 | lose_syserr ("Failed to unlock scores file"); | |
65396510 | 249 | exit (EXIT_SUCCESS); |
2f1de3dd CW |
250 | } |
251 | ||
b23b5a5b | 252 | static int |
873fbd0b | 253 | read_score (FILE *f, struct score_entry *score) |
2f1de3dd CW |
254 | { |
255 | int c; | |
98a428c1 EZ |
256 | if ((c = getc (f)) != EOF) |
257 | ungetc (c, f); | |
a5d107f3 | 258 | if (feof (f)) |
2f1de3dd | 259 | return 1; |
98a428c1 | 260 | for (score->score = 0; (c = getc (f)) != EOF && isdigit (c); ) |
cd553ffb | 261 | { |
d70efef4 PE |
262 | if (INTMAX_MAX / 10 < score->score) |
263 | return -1; | |
cd553ffb | 264 | score->score *= 10; |
d70efef4 PE |
265 | if (INTMAX_MAX - (c - '0') < score->score) |
266 | return -1; | |
267 | score->score += c - '0'; | |
cd553ffb | 268 | } |
a5d107f3 RS |
269 | while ((c = getc (f)) != EOF |
270 | && isspace (c)) | |
cd553ffb CW |
271 | ; |
272 | if (c == EOF) | |
273 | return -1; | |
a5d107f3 | 274 | ungetc (c, f); |
cd553ffb CW |
275 | #ifdef HAVE_GETDELIM |
276 | { | |
7605f1bd | 277 | size_t count = 0; |
a5d107f3 | 278 | if (getdelim (&score->username, &count, ' ', f) < 1 |
cd553ffb CW |
279 | || score->username == NULL) |
280 | return -1; | |
1d4328ff | 281 | /* Trim the space */ |
a5d107f3 | 282 | score->username[strlen (score->username)-1] = '\0'; |
2f1de3dd | 283 | } |
cd553ffb CW |
284 | #else |
285 | { | |
d70efef4 PE |
286 | ptrdiff_t unameread = 0; |
287 | ptrdiff_t unamelen = 30; | |
a5d107f3 | 288 | char *username = malloc (unamelen); |
f5bceaf8 CW |
289 | if (!username) |
290 | return -1; | |
177c0ea7 | 291 | |
d70efef4 | 292 | while ((c = getc (f)) != EOF && c != ' ') |
cd553ffb | 293 | { |
d70efef4 PE |
294 | if (unameread >= unamelen - 1) |
295 | { | |
296 | ptrdiff_t unamelen_max = min (PTRDIFF_MAX, SIZE_MAX); | |
297 | if (unamelen <= unamelen_max / 2) | |
298 | unamelen *= 2; | |
299 | else if (unamelen < unamelen_max) | |
300 | unamelen = unamelen_max; | |
301 | else | |
302 | { | |
303 | errno = ENOMEM; | |
304 | return -1; | |
305 | } | |
306 | username = realloc (username, unamelen); | |
307 | if (!username) | |
308 | return -1; | |
309 | } | |
cd553ffb CW |
310 | username[unameread] = c; |
311 | unameread++; | |
312 | } | |
177c0ea7 | 313 | if (c == EOF) |
f5bceaf8 CW |
314 | return -1; |
315 | username[unameread] = '\0'; | |
cd553ffb CW |
316 | score->username = username; |
317 | } | |
318 | #endif | |
2f1de3dd CW |
319 | #ifdef HAVE_GETLINE |
320 | score->data = NULL; | |
7605f1bd | 321 | errno = 0; |
2f1de3dd | 322 | { |
7605f1bd | 323 | size_t len; |
a5d107f3 | 324 | if (getline (&score->data, &len, f) < 0) |
2f1de3dd | 325 | return -1; |
a5d107f3 | 326 | score->data[strlen (score->data)-1] = '\0'; |
2f1de3dd CW |
327 | } |
328 | #else | |
cd553ffb | 329 | { |
d70efef4 PE |
330 | ptrdiff_t cur = 0; |
331 | ptrdiff_t len = 16; | |
a5d107f3 | 332 | char *buf = malloc (len); |
cd553ffb CW |
333 | if (!buf) |
334 | return -1; | |
a5d107f3 | 335 | while ((c = getc (f)) != EOF |
f5bceaf8 | 336 | && c != '\n') |
cd553ffb CW |
337 | { |
338 | if (cur >= len-1) | |
339 | { | |
d70efef4 PE |
340 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < len) |
341 | { | |
342 | errno = ENOMEM; | |
343 | return -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 | ||
b23b5a5b | 358 | static int |
d70efef4 PE |
359 | read_scores (const char *filename, struct score_entry **scores, |
360 | ptrdiff_t *count, ptrdiff_t *alloc) | |
2f1de3dd | 361 | { |
d70efef4 PE |
362 | int readval = -1; |
363 | ptrdiff_t scorecount = 0; | |
364 | ptrdiff_t cursize = 0; | |
365 | struct score_entry *ret = 0; | |
366 | struct score_entry entry; | |
a5d107f3 | 367 | FILE *f = fopen (filename, "r"); |
98a428c1 | 368 | int retval = -1; |
177c0ea7 | 369 | if (!f) |
2f1de3dd | 370 | return -1; |
d70efef4 PE |
371 | while ((readval = read_score (f, &entry)) == 0) |
372 | if (push_score (&ret, &scorecount, &cursize, &entry) < 0) | |
373 | return -1; | |
98a428c1 EZ |
374 | if (readval > 0) |
375 | { | |
376 | *count = scorecount; | |
d70efef4 | 377 | *alloc = cursize; |
98a428c1 EZ |
378 | *scores = ret; |
379 | retval = 0; | |
380 | } | |
381 | fclose (f); | |
382 | return retval; | |
2f1de3dd CW |
383 | } |
384 | ||
b23b5a5b | 385 | static int |
873fbd0b | 386 | score_compare (const void *a, const void *b) |
2f1de3dd CW |
387 | { |
388 | const struct score_entry *sa = (const struct score_entry *) a; | |
389 | const struct score_entry *sb = (const struct score_entry *) b; | |
390 | return (sb->score > sa->score) - (sb->score < sa->score); | |
391 | } | |
392 | ||
b23b5a5b | 393 | static int |
873fbd0b | 394 | score_compare_reverse (const void *a, const void *b) |
2f1de3dd | 395 | { |
d70efef4 | 396 | return score_compare (b, a); |
2f1de3dd CW |
397 | } |
398 | ||
399 | int | |
d70efef4 PE |
400 | push_score (struct score_entry **scores, ptrdiff_t *count, ptrdiff_t *size, |
401 | struct score_entry const *newscore) | |
2f1de3dd | 402 | { |
d70efef4 PE |
403 | struct score_entry *newscores = *scores; |
404 | if (*count == *size) | |
405 | { | |
406 | ptrdiff_t newsize = *size; | |
407 | if (newsize <= 0) | |
408 | newsize = 1; | |
409 | else if (newsize <= MAX_SCORES / 2) | |
410 | newsize *= 2; | |
411 | else if (newsize < MAX_SCORES) | |
412 | newsize = MAX_SCORES; | |
413 | else | |
414 | { | |
415 | errno = ENOMEM; | |
416 | return -1; | |
417 | } | |
418 | newscores = realloc (newscores, sizeof *newscores * newsize); | |
419 | if (!newscores) | |
420 | return -1; | |
421 | *scores = newscores; | |
422 | *size = newsize; | |
423 | } | |
424 | newscores[*count] = *newscore; | |
2f1de3dd | 425 | (*count) += 1; |
2f1de3dd CW |
426 | return 0; |
427 | } | |
177c0ea7 | 428 | |
b23b5a5b | 429 | static void |
d70efef4 | 430 | sort_scores (struct score_entry *scores, ptrdiff_t count, bool reverse) |
2f1de3dd | 431 | { |
d70efef4 PE |
432 | qsort (scores, count, sizeof *scores, |
433 | reverse ? score_compare_reverse : score_compare); | |
2f1de3dd CW |
434 | } |
435 | ||
b23b5a5b | 436 | static int |
d70efef4 PE |
437 | write_scores (const char *filename, const struct score_entry *scores, |
438 | ptrdiff_t count) | |
2f1de3dd | 439 | { |
e0fdb694 | 440 | int fd; |
177c0ea7 | 441 | FILE *f; |
d70efef4 | 442 | ptrdiff_t i; |
a5d107f3 | 443 | char *tempfile = malloc (strlen (filename) + strlen (".tempXXXXXX") + 1); |
2f1de3dd CW |
444 | if (!tempfile) |
445 | return -1; | |
a5d107f3 RS |
446 | strcpy (tempfile, filename); |
447 | strcat (tempfile, ".tempXXXXXX"); | |
e0fdb694 PE |
448 | fd = mkostemp (tempfile, 0); |
449 | if (fd < 0) | |
450 | return -1; | |
451 | f = fdopen (fd, "w"); | |
452 | if (! f) | |
2f1de3dd CW |
453 | return -1; |
454 | for (i = 0; i < count; i++) | |
d70efef4 PE |
455 | if (fprintf (f, "%"PRIdMAX" %s %s\n", |
456 | scores[i].score, scores[i].username, scores[i].data) | |
457 | < 0) | |
2f1de3dd | 458 | return -1; |
a5d107f3 RS |
459 | fclose (f); |
460 | if (rename (tempfile, filename) < 0) | |
2f1de3dd | 461 | return -1; |
a5d107f3 | 462 | if (chmod (filename, 0644) < 0) |
2f1de3dd | 463 | return -1; |
8eec804f | 464 | return 0; |
2f1de3dd | 465 | } |
177c0ea7 | 466 | |
b23b5a5b | 467 | static int |
873fbd0b | 468 | lock_file (const char *filename, void **state) |
2f1de3dd CW |
469 | { |
470 | int fd; | |
7c4f6873 | 471 | struct stat buf; |
2f1de3dd | 472 | int attempts = 0; |
988e88ab | 473 | const char *lockext = ".lockfile"; |
a5d107f3 | 474 | char *lockpath = malloc (strlen (filename) + strlen (lockext) + 60); |
2f1de3dd CW |
475 | if (!lockpath) |
476 | return -1; | |
a5d107f3 RS |
477 | strcpy (lockpath, filename); |
478 | strcat (lockpath, lockext); | |
2f1de3dd CW |
479 | *state = lockpath; |
480 | trylock: | |
481 | attempts++; | |
7c4f6873 | 482 | /* If the lock is over an hour old, delete it. */ |
a5d107f3 RS |
483 | if (stat (lockpath, &buf) == 0 |
484 | && (difftime (buf.st_ctime, time (NULL) > 60*60))) | |
485 | unlink (lockpath); | |
00a7e408 RS |
486 | fd = open (lockpath, O_CREAT | O_EXCL, 0600); |
487 | if (fd < 0) | |
2f1de3dd CW |
488 | { |
489 | if (errno == EEXIST) | |
490 | { | |
491 | /* Break the lock; we won't corrupt the file, but we might | |
492 | lose some scores. */ | |
493 | if (attempts > MAX_ATTEMPTS) | |
7c4f6873 | 494 | { |
a5d107f3 | 495 | unlink (lockpath); |
7c4f6873 CW |
496 | attempts = 0; |
497 | } | |
a5d107f3 | 498 | sleep ((rand () % 2)+1); |
2f1de3dd CW |
499 | goto trylock; |
500 | } | |
501 | else | |
502 | return -1; | |
503 | } | |
a5d107f3 | 504 | close (fd); |
2f1de3dd CW |
505 | return 0; |
506 | } | |
177c0ea7 | 507 | |
b23b5a5b | 508 | static int |
873fbd0b | 509 | unlock_file (const char *filename, void *state) |
2f1de3dd CW |
510 | { |
511 | char *lockpath = (char *) state; | |
2f1de3dd | 512 | int saved_errno = errno; |
d70efef4 PE |
513 | int ret = unlink (lockpath); |
514 | int unlink_errno = errno; | |
a5d107f3 | 515 | free (lockpath); |
d70efef4 | 516 | errno = ret < 0 ? unlink_errno : saved_errno; |
2f1de3dd CW |
517 | return ret; |
518 | } | |
ab5796a9 | 519 | |
65396510 | 520 | /* update-game-score.c ends here */ |