Commit | Line | Data |
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1960e228 | 1 | /* -*- c-file-style: "linux" -*- |
5cb37436 WD |
2 | * |
3 | * Copyright (C) 1996-2000 by Andrew Tridgell | |
0ecfbf27 MP |
4 | * Copyright (C) Paul Mackerras 1996 |
5 | * Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org> | |
5cb37436 | 6 | * |
0ecfbf27 MP |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
5cb37436 | 11 | * |
0ecfbf27 MP |
12 | * This program 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. | |
5cb37436 | 16 | * |
0ecfbf27 MP |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
c627d613 | 21 | |
ac13ad10 | 22 | /** |
0ecfbf27 | 23 | * @file |
ac13ad10 | 24 | * |
5cb37436 | 25 | * Utilities used in rsync |
ac13ad10 | 26 | **/ |
c627d613 | 27 | |
c627d613 AT |
28 | #include "rsync.h" |
29 | ||
c7c11a0d | 30 | extern int verbose; |
bc6ebcd2 WD |
31 | extern int dry_run; |
32 | extern int module_id; | |
33 | extern int modify_window; | |
bf6dcd17 | 34 | extern struct exclude_list_struct server_exclude_list; |
c7c11a0d | 35 | |
0ecfbf27 MP |
36 | int sanitize_paths = 0; |
37 | ||
38 | ||
f0359dd0 | 39 | |
ac13ad10 | 40 | /** |
0ecfbf27 MP |
41 | * Set a fd into nonblocking mode |
42 | **/ | |
f0359dd0 AT |
43 | void set_nonblocking(int fd) |
44 | { | |
45 | int val; | |
46 | ||
0ecfbf27 | 47 | if ((val = fcntl(fd, F_GETFL, 0)) == -1) |
f0359dd0 AT |
48 | return; |
49 | if (!(val & NONBLOCK_FLAG)) { | |
50 | val |= NONBLOCK_FLAG; | |
51 | fcntl(fd, F_SETFL, val); | |
52 | } | |
53 | } | |
54 | ||
ac13ad10 | 55 | /** |
0ecfbf27 MP |
56 | * Set a fd into blocking mode |
57 | **/ | |
36349ea0 AT |
58 | void set_blocking(int fd) |
59 | { | |
60 | int val; | |
61 | ||
0ecfbf27 | 62 | if ((val = fcntl(fd, F_GETFL, 0)) == -1) |
36349ea0 AT |
63 | return; |
64 | if (val & NONBLOCK_FLAG) { | |
65 | val &= ~NONBLOCK_FLAG; | |
66 | fcntl(fd, F_SETFL, val); | |
67 | } | |
68 | } | |
69 | ||
f0359dd0 | 70 | |
ac13ad10 | 71 | /** |
0ecfbf27 MP |
72 | * Create a file descriptor pair - like pipe() but use socketpair if |
73 | * possible (because of blocking issues on pipes). | |
5cb37436 | 74 | * |
0ecfbf27 | 75 | * Always set non-blocking. |
f0359dd0 | 76 | */ |
08f15335 AT |
77 | int fd_pair(int fd[2]) |
78 | { | |
f0359dd0 AT |
79 | int ret; |
80 | ||
08f15335 | 81 | #if HAVE_SOCKETPAIR |
f0359dd0 | 82 | ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd); |
08f15335 | 83 | #else |
f0359dd0 | 84 | ret = pipe(fd); |
08f15335 | 85 | #endif |
f0359dd0 AT |
86 | |
87 | if (ret == 0) { | |
88 | set_nonblocking(fd[0]); | |
89 | set_nonblocking(fd[1]); | |
90 | } | |
0ecfbf27 | 91 | |
f0359dd0 | 92 | return ret; |
08f15335 AT |
93 | } |
94 | ||
95 | ||
0ecfbf27 | 96 | void print_child_argv(char **cmd) |
5ad0e46f | 97 | { |
1bbd10fe | 98 | rprintf(FINFO, "opening connection using "); |
5ad0e46f MP |
99 | for (; *cmd; cmd++) { |
100 | /* Look for characters that ought to be quoted. This | |
101 | * is not a great quoting algorithm, but it's | |
102 | * sufficient for a log message. */ | |
103 | if (strspn(*cmd, "abcdefghijklmnopqrstuvwxyz" | |
104 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
105 | "0123456789" | |
106 | ",.-_=+@/") != strlen(*cmd)) { | |
107 | rprintf(FINFO, "\"%s\" ", *cmd); | |
108 | } else { | |
109 | rprintf(FINFO, "%s ", *cmd); | |
110 | } | |
111 | } | |
112 | rprintf(FINFO, "\n"); | |
113 | } | |
114 | ||
115 | ||
c627d613 AT |
116 | void out_of_memory(char *str) |
117 | { | |
c284f34a WD |
118 | rprintf(FERROR, "ERROR: out of memory in %s\n", str); |
119 | exit_cleanup(RERR_MALLOC); | |
575f2fca AT |
120 | } |
121 | ||
122 | void overflow(char *str) | |
123 | { | |
c284f34a WD |
124 | rprintf(FERROR, "ERROR: buffer overflow in %s\n", str); |
125 | exit_cleanup(RERR_MALLOC); | |
c627d613 AT |
126 | } |
127 | ||
128 | ||
c627d613 | 129 | |
404e813c | 130 | int set_modtime(char *fname, time_t modtime) |
c627d613 | 131 | { |
404e813c MP |
132 | if (dry_run) |
133 | return 0; | |
134 | ||
135 | if (verbose > 2) { | |
136 | rprintf(FINFO, "set modtime of %s to (%ld) %s", | |
137 | fname, (long) modtime, | |
138 | asctime(localtime(&modtime))); | |
139 | } | |
5cb37436 | 140 | |
31e12522 | 141 | { |
1e9f155a | 142 | #ifdef HAVE_UTIMBUF |
5cb37436 | 143 | struct utimbuf tbuf; |
31e12522 AT |
144 | tbuf.actime = time(NULL); |
145 | tbuf.modtime = modtime; | |
146 | return utime(fname,&tbuf); | |
c627d613 | 147 | #elif defined(HAVE_UTIME) |
31e12522 AT |
148 | time_t t[2]; |
149 | t[0] = time(NULL); | |
150 | t[1] = modtime; | |
151 | return utime(fname,t); | |
c627d613 | 152 | #else |
31e12522 AT |
153 | struct timeval t[2]; |
154 | t[0].tv_sec = time(NULL); | |
155 | t[0].tv_usec = 0; | |
156 | t[1].tv_sec = modtime; | |
157 | t[1].tv_usec = 0; | |
158 | return utimes(fname,t); | |
c627d613 | 159 | #endif |
31e12522 | 160 | } |
c627d613 | 161 | } |
94481d91 | 162 | |
720b47f2 | 163 | |
ac13ad10 MP |
164 | /** |
165 | Create any necessary directories in fname. Unfortunately we don't know | |
166 | what perms to give the directory when this is called so we need to rely | |
167 | on the umask | |
168 | **/ | |
0ecfbf27 | 169 | int create_directory_path(char *fname, int base_umask) |
6574b4f7 | 170 | { |
6574b4f7 AT |
171 | char *p; |
172 | ||
c284f34a WD |
173 | while (*fname == '/') |
174 | fname++; | |
175 | while (strncmp(fname, "./", 2) == 0) | |
176 | fname += 2; | |
6574b4f7 AT |
177 | |
178 | p = fname; | |
c284f34a | 179 | while ((p = strchr(p,'/')) != NULL) { |
6574b4f7 | 180 | *p = 0; |
5cb37436 | 181 | do_mkdir(fname, 0777 & ~base_umask); |
6574b4f7 AT |
182 | *p = '/'; |
183 | p++; | |
184 | } | |
185 | return 0; | |
186 | } | |
950ab32d AT |
187 | |
188 | ||
ac13ad10 MP |
189 | /** |
190 | * Write @p len bytes at @p ptr to descriptor @p desc, retrying if | |
191 | * interrupted. | |
192 | * | |
193 | * @retval len upon success | |
194 | * | |
195 | * @retval <0 write's (negative) error code | |
196 | * | |
197 | * Derived from GNU C's cccp.c. | |
198 | */ | |
9dd891bb | 199 | static int full_write(int desc, char *ptr, size_t len) |
950ab32d AT |
200 | { |
201 | int total_written; | |
5cb37436 | 202 | |
950ab32d AT |
203 | total_written = 0; |
204 | while (len > 0) { | |
5c1b7bfd | 205 | int written = write(desc, ptr, len); |
950ab32d | 206 | if (written < 0) { |
950ab32d AT |
207 | if (errno == EINTR) |
208 | continue; | |
950ab32d AT |
209 | return written; |
210 | } | |
211 | total_written += written; | |
212 | ptr += written; | |
213 | len -= written; | |
214 | } | |
215 | return total_written; | |
216 | } | |
217 | ||
950ab32d | 218 | |
ac13ad10 MP |
219 | /** |
220 | * Read @p len bytes at @p ptr from descriptor @p desc, retrying if | |
221 | * interrupted. | |
222 | * | |
223 | * @retval >0 the actual number of bytes read | |
224 | * | |
225 | * @retval 0 for EOF | |
226 | * | |
227 | * @retval <0 for an error. | |
228 | * | |
229 | * Derived from GNU C's cccp.c. */ | |
9dd891bb | 230 | static int safe_read(int desc, char *ptr, size_t len) |
950ab32d AT |
231 | { |
232 | int n_chars; | |
5cb37436 | 233 | |
9dd891bb | 234 | if (len == 0) |
950ab32d | 235 | return len; |
5cb37436 | 236 | |
950ab32d AT |
237 | do { |
238 | n_chars = read(desc, ptr, len); | |
239 | } while (n_chars < 0 && errno == EINTR); | |
5cb37436 | 240 | |
950ab32d AT |
241 | return n_chars; |
242 | } | |
243 | ||
244 | ||
ac13ad10 MP |
245 | /** Copy a file. |
246 | * | |
247 | * This is used in conjunction with the --temp-dir option */ | |
950ab32d AT |
248 | int copy_file(char *source, char *dest, mode_t mode) |
249 | { | |
250 | int ifd; | |
251 | int ofd; | |
252 | char buf[1024 * 8]; | |
253 | int len; /* Number of bytes read into `buf'. */ | |
254 | ||
8c9fd200 | 255 | ifd = do_open(source, O_RDONLY, 0); |
950ab32d | 256 | if (ifd == -1) { |
d62bcc17 | 257 | rsyserr(FERROR, errno, "open %s", full_fname(source)); |
950ab32d AT |
258 | return -1; |
259 | } | |
260 | ||
c7c11a0d | 261 | if (robust_unlink(dest) && errno != ENOENT) { |
d62bcc17 | 262 | rsyserr(FERROR, errno, "unlink %s", full_fname(dest)); |
950ab32d AT |
263 | return -1; |
264 | } | |
265 | ||
31e12522 | 266 | ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode); |
c46ded46 | 267 | if (ofd == -1) { |
d62bcc17 | 268 | rsyserr(FERROR, errno, "open %s", full_fname(dest)); |
950ab32d AT |
269 | close(ifd); |
270 | return -1; | |
271 | } | |
272 | ||
5cb37436 | 273 | while ((len = safe_read(ifd, buf, sizeof buf)) > 0) { |
950ab32d | 274 | if (full_write(ofd, buf, len) < 0) { |
d62bcc17 | 275 | rsyserr(FERROR, errno, "write %s", full_fname(dest)); |
950ab32d AT |
276 | close(ifd); |
277 | close(ofd); | |
278 | return -1; | |
279 | } | |
280 | } | |
281 | ||
8b602edd | 282 | if (len < 0) { |
d62bcc17 | 283 | rsyserr(FERROR, errno, "read %s", full_fname(source)); |
8b602edd WD |
284 | close(ifd); |
285 | close(ofd); | |
286 | return -1; | |
287 | } | |
288 | ||
9f27cd8c | 289 | if (close(ifd) < 0) { |
d62bcc17 WD |
290 | rsyserr(FINFO, errno, "close failed on %s", |
291 | full_fname(source)); | |
9f27cd8c WD |
292 | } |
293 | ||
294 | if (close(ofd) < 0) { | |
d62bcc17 WD |
295 | rsyserr(FERROR, errno, "close failed on %s", |
296 | full_fname(dest)); | |
9f27cd8c WD |
297 | return -1; |
298 | } | |
950ab32d | 299 | |
950ab32d AT |
300 | return 0; |
301 | } | |
feaa89c4 | 302 | |
c7c11a0d DD |
303 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ |
304 | #define MAX_RENAMES_DIGITS 3 | |
305 | #define MAX_RENAMES 1000 | |
306 | ||
ac13ad10 | 307 | /** |
b4235b31 MP |
308 | * Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so |
309 | * rename to <path>/.rsyncNNN instead. | |
310 | * | |
311 | * Note that successive rsync runs will shuffle the filenames around a | |
312 | * bit as long as the file is still busy; this is because this function | |
313 | * does not know if the unlink call is due to a new file coming in, or | |
314 | * --delete trying to remove old .rsyncNNN files, hence it renames it | |
315 | * each time. | |
316 | **/ | |
c7c11a0d DD |
317 | int robust_unlink(char *fname) |
318 | { | |
319 | #ifndef ETXTBSY | |
320 | return do_unlink(fname); | |
321 | #else | |
322 | static int counter = 1; | |
323 | int rc, pos, start; | |
324 | char path[MAXPATHLEN]; | |
325 | ||
326 | rc = do_unlink(fname); | |
c284f34a | 327 | if (rc == 0 || errno != ETXTBSY) |
c7c11a0d DD |
328 | return rc; |
329 | ||
c284f34a WD |
330 | if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN) |
331 | pos = MAXPATHLEN - 1; | |
c7c11a0d | 332 | |
c284f34a WD |
333 | while (pos > 0 && path[pos-1] != '/') |
334 | pos--; | |
5cb37436 | 335 | pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos); |
c7c11a0d DD |
336 | |
337 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
338 | errno = ETXTBSY; | |
339 | return -1; | |
340 | } | |
341 | ||
342 | /* start where the last one left off to reduce chance of clashes */ | |
343 | start = counter; | |
344 | do { | |
345 | sprintf(&path[pos], "%03d", counter); | |
346 | if (++counter >= MAX_RENAMES) | |
347 | counter = 1; | |
c284f34a | 348 | } while ((rc = access(path, 0)) == 0 && counter != start); |
c7c11a0d | 349 | |
4791825d | 350 | if (verbose > 0) { |
c7c11a0d | 351 | rprintf(FINFO,"renaming %s to %s because of text busy\n", |
4791825d WD |
352 | fname, path); |
353 | } | |
c7c11a0d DD |
354 | |
355 | /* maybe we should return rename()'s exit status? Nah. */ | |
356 | if (do_rename(fname, path) != 0) { | |
357 | errno = ETXTBSY; | |
358 | return -1; | |
359 | } | |
360 | return 0; | |
361 | #endif | |
362 | } | |
363 | ||
62c9e6b3 WD |
364 | /* Returns 0 on success, -1 on most errors, and -2 if we got an error |
365 | * trying to copy the file across file systems. */ | |
366 | int robust_rename(char *from, char *to, int mode) | |
c7c11a0d | 367 | { |
62c9e6b3 WD |
368 | int tries = 4; |
369 | ||
370 | while (tries--) { | |
371 | if (do_rename(from, to) == 0) | |
372 | return 0; | |
373 | ||
374 | switch (errno) { | |
375 | #ifdef ETXTBSY | |
376 | case ETXTBSY: | |
377 | if (robust_unlink(to) != 0) | |
378 | return -1; | |
379 | break; | |
c7c11a0d | 380 | #endif |
62c9e6b3 WD |
381 | case EXDEV: |
382 | if (copy_file(from, to, mode) != 0) | |
383 | return -2; | |
384 | do_unlink(from); | |
385 | return 0; | |
386 | default: | |
387 | return -1; | |
388 | } | |
389 | } | |
390 | return -1; | |
feaa89c4 | 391 | } |
3ba62a83 AT |
392 | |
393 | ||
394 | static pid_t all_pids[10]; | |
395 | static int num_pids; | |
396 | ||
4cf64834 | 397 | /** Fork and record the pid of the child. **/ |
3ba62a83 AT |
398 | pid_t do_fork(void) |
399 | { | |
400 | pid_t newpid = fork(); | |
5cb37436 | 401 | |
4cf64834 | 402 | if (newpid != 0 && newpid != -1) { |
3ba62a83 AT |
403 | all_pids[num_pids++] = newpid; |
404 | } | |
405 | return newpid; | |
406 | } | |
407 | ||
4cf64834 MP |
408 | /** |
409 | * Kill all children. | |
410 | * | |
411 | * @todo It would be kind of nice to make sure that they are actually | |
412 | * all our children before we kill them, because their pids may have | |
413 | * been recycled by some other process. Perhaps when we wait for a | |
414 | * child, we should remove it from this array. Alternatively we could | |
415 | * perhaps use process groups, but I think that would not work on | |
416 | * ancient Unix versions that don't support them. | |
417 | **/ | |
3ba62a83 AT |
418 | void kill_all(int sig) |
419 | { | |
420 | int i; | |
4cf64834 MP |
421 | |
422 | for (i = 0; i < num_pids; i++) { | |
423 | /* Let's just be a little careful where we | |
424 | * point that gun, hey? See kill(2) for the | |
425 | * magic caused by negative values. */ | |
426 | pid_t p = all_pids[i]; | |
427 | ||
428 | if (p == getpid()) | |
429 | continue; | |
430 | if (p <= 0) | |
431 | continue; | |
432 | ||
433 | kill(p, sig); | |
3ba62a83 AT |
434 | } |
435 | } | |
9486289c | 436 | |
4cf64834 | 437 | |
ac13ad10 | 438 | /** Turn a user name into a uid */ |
8ef4ffd6 AT |
439 | int name_to_uid(char *name, uid_t *uid) |
440 | { | |
441 | struct passwd *pass; | |
442 | if (!name || !*name) return 0; | |
443 | pass = getpwnam(name); | |
444 | if (pass) { | |
445 | *uid = pass->pw_uid; | |
446 | return 1; | |
447 | } | |
448 | return 0; | |
449 | } | |
450 | ||
ac13ad10 | 451 | /** Turn a group name into a gid */ |
8ef4ffd6 AT |
452 | int name_to_gid(char *name, gid_t *gid) |
453 | { | |
454 | struct group *grp; | |
455 | if (!name || !*name) return 0; | |
456 | grp = getgrnam(name); | |
457 | if (grp) { | |
458 | *gid = grp->gr_gid; | |
459 | return 1; | |
460 | } | |
461 | return 0; | |
462 | } | |
463 | ||
ff8b29b8 | 464 | |
ac13ad10 | 465 | /** Lock a byte range in a open file */ |
31593dd6 | 466 | int lock_range(int fd, int offset, int len) |
0c515f17 | 467 | { |
31593dd6 | 468 | struct flock lock; |
0c515f17 | 469 | |
31593dd6 AT |
470 | lock.l_type = F_WRLCK; |
471 | lock.l_whence = SEEK_SET; | |
472 | lock.l_start = offset; | |
473 | lock.l_len = len; | |
474 | lock.l_pid = 0; | |
5cb37436 | 475 | |
31593dd6 | 476 | return fcntl(fd,F_SETLK,&lock) == 0; |
0c515f17 | 477 | } |
874895d5 | 478 | |
4791825d WD |
479 | static int exclude_server_path(char *arg) |
480 | { | |
481 | char *s; | |
4791825d | 482 | |
bf6dcd17 | 483 | if (server_exclude_list.head) { |
4791825d WD |
484 | for (s = arg; (s = strchr(s, '/')) != NULL; ) { |
485 | *s = '\0'; | |
9fdb334e | 486 | if (check_exclude(&server_exclude_list, arg, 1) < 0) { |
4791825d WD |
487 | /* We must leave arg truncated! */ |
488 | return 1; | |
489 | } | |
490 | *s++ = '/'; | |
491 | } | |
492 | } | |
493 | return 0; | |
494 | } | |
874895d5 | 495 | |
cb13abfe | 496 | static void glob_expand_one(char *s, char **argv, int *argc, int maxargs) |
874895d5 | 497 | { |
932be9aa | 498 | #if !(defined(HAVE_GLOB) && defined(HAVE_GLOB_H)) |
4135d091 WD |
499 | if (maxargs <= *argc) |
500 | return; | |
501 | if (!*s) | |
502 | s = "."; | |
4791825d WD |
503 | s = argv[*argc] = strdup(s); |
504 | exclude_server_path(s); | |
874895d5 | 505 | (*argc)++; |
874895d5 AT |
506 | #else |
507 | glob_t globbuf; | |
508 | int i; | |
509 | ||
4135d091 WD |
510 | if (!*s) |
511 | s = "."; | |
e42c9458 | 512 | |
4791825d | 513 | s = argv[*argc] = strdup(s); |
4135d091 | 514 | if (sanitize_paths) |
4791825d | 515 | sanitize_path(s, NULL); |
087bf010 | 516 | |
5cb37436 | 517 | memset(&globbuf, 0, sizeof globbuf); |
4791825d WD |
518 | if (!exclude_server_path(s)) |
519 | glob(s, 0, NULL, &globbuf); | |
874895d5 AT |
520 | if (globbuf.gl_pathc == 0) { |
521 | (*argc)++; | |
522 | globfree(&globbuf); | |
523 | return; | |
524 | } | |
c284f34a WD |
525 | for (i = 0; i < maxargs - *argc && i < (int)globbuf.gl_pathc; i++) { |
526 | if (i == 0) | |
527 | free(s); | |
528 | argv[*argc + i] = strdup(globbuf.gl_pathv[i]); | |
529 | if (!argv[*argc + i]) | |
530 | out_of_memory("glob_expand"); | |
874895d5 AT |
531 | } |
532 | globfree(&globbuf); | |
c284f34a | 533 | *argc += i; |
874895d5 AT |
534 | #endif |
535 | } | |
5a96ee05 | 536 | |
4791825d | 537 | /* This routine is only used in daemon mode. */ |
cb13abfe | 538 | void glob_expand(char *base1, char **argv, int *argc, int maxargs) |
087bf010 AT |
539 | { |
540 | char *s = argv[*argc]; | |
541 | char *p, *q; | |
ba5e128d | 542 | char *base = base1; |
4791825d | 543 | int base_len = strlen(base); |
087bf010 AT |
544 | |
545 | if (!s || !*s) return; | |
546 | ||
4791825d WD |
547 | if (strncmp(s, base, base_len) == 0) |
548 | s += base_len; | |
e42c9458 | 549 | |
087bf010 AT |
550 | s = strdup(s); |
551 | if (!s) out_of_memory("glob_expand"); | |
552 | ||
8950ac03 | 553 | if (asprintf(&base," %s/", base1) <= 0) out_of_memory("glob_expand"); |
4791825d | 554 | base_len++; |
ba5e128d | 555 | |
087bf010 | 556 | q = s; |
c284f34a | 557 | while ((p = strstr(q,base)) != NULL && *argc < maxargs) { |
ba5e128d AT |
558 | /* split it at this point */ |
559 | *p = 0; | |
cb13abfe | 560 | glob_expand_one(q, argv, argc, maxargs); |
4791825d | 561 | q = p + base_len; |
087bf010 AT |
562 | } |
563 | ||
c284f34a WD |
564 | if (*q && *argc < maxargs) |
565 | glob_expand_one(q, argv, argc, maxargs); | |
087bf010 AT |
566 | |
567 | free(s); | |
ba5e128d | 568 | free(base); |
087bf010 | 569 | } |
5a96ee05 | 570 | |
ac13ad10 MP |
571 | /** |
572 | * Convert a string to lower case | |
573 | **/ | |
5a96ee05 AT |
574 | void strlower(char *s) |
575 | { | |
576 | while (*s) { | |
32f76175 MP |
577 | if (isupper(* (unsigned char *) s)) |
578 | *s = tolower(* (unsigned char *) s); | |
5a96ee05 AT |
579 | s++; |
580 | } | |
581 | } | |
e42c9458 | 582 | |
368ad70e WD |
583 | /* Join strings p1 & p2 into "dest" with a guaranteed '/' between them. (If |
584 | * p1 ends with a '/', no extra '/' is inserted.) Returns the length of both | |
a8f7e4b8 WD |
585 | * strings + 1 (if '/' was inserted), regardless of whether the null-terminated |
586 | * string fits into destsize. */ | |
368ad70e WD |
587 | size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2) |
588 | { | |
589 | size_t len = strlcpy(dest, p1, destsize); | |
590 | if (len < destsize - 1) { | |
591 | if (!len || dest[len-1] != '/') | |
592 | dest[len++] = '/'; | |
593 | if (len < destsize - 1) | |
594 | len += strlcpy(dest + len, p2, destsize - len); | |
595 | else { | |
596 | dest[len] = '\0'; | |
597 | len += strlen(p2); | |
598 | } | |
599 | } | |
600 | else | |
601 | len += strlen(p2) + 1; /* Assume we'd insert a '/'. */ | |
602 | return len; | |
603 | } | |
604 | ||
605 | /* Join any number of strings together, putting them in "dest". The return | |
a8f7e4b8 WD |
606 | * value is the length of all the strings, regardless of whether the null- |
607 | * terminated whole fits in destsize. Your list of string pointers must end | |
608 | * with a NULL to indicate the end of the list. */ | |
368ad70e WD |
609 | size_t stringjoin(char *dest, size_t destsize, ...) |
610 | { | |
5cb37436 | 611 | va_list ap; |
368ad70e WD |
612 | size_t len, ret = 0; |
613 | const char *src; | |
614 | ||
615 | va_start(ap, destsize); | |
616 | while (1) { | |
617 | if (!(src = va_arg(ap, const char *))) | |
618 | break; | |
619 | len = strlen(src); | |
620 | ret += len; | |
621 | if (destsize > 1) { | |
622 | if (len >= destsize) | |
623 | len = destsize - 1; | |
624 | memcpy(dest, src, len); | |
625 | destsize -= len; | |
626 | dest += len; | |
627 | } | |
628 | } | |
629 | *dest = '\0'; | |
630 | va_end(ap); | |
631 | ||
632 | return ret; | |
633 | } | |
634 | ||
5243c216 AT |
635 | void clean_fname(char *name) |
636 | { | |
637 | char *p; | |
638 | int l; | |
639 | int modified = 1; | |
640 | ||
641 | if (!name) return; | |
642 | ||
643 | while (modified) { | |
644 | modified = 0; | |
645 | ||
c284f34a | 646 | if ((p = strstr(name,"/./")) != NULL) { |
5243c216 AT |
647 | modified = 1; |
648 | while (*p) { | |
649 | p[0] = p[2]; | |
650 | p++; | |
651 | } | |
652 | } | |
653 | ||
c284f34a | 654 | if ((p = strstr(name,"//")) != NULL) { |
5243c216 AT |
655 | modified = 1; |
656 | while (*p) { | |
657 | p[0] = p[1]; | |
658 | p++; | |
659 | } | |
660 | } | |
661 | ||
c284f34a | 662 | if (strncmp(p = name, "./", 2) == 0) { |
5243c216 AT |
663 | modified = 1; |
664 | do { | |
665 | p[0] = p[2]; | |
666 | } while (*p++); | |
667 | } | |
668 | ||
c284f34a | 669 | l = strlen(p = name); |
5243c216 AT |
670 | if (l > 1 && p[l-1] == '/') { |
671 | modified = 1; | |
672 | p[l-1] = 0; | |
673 | } | |
674 | } | |
675 | } | |
676 | ||
ac13ad10 | 677 | /** |
1b8e662a | 678 | * Make path appear as if a chroot had occurred: |
ac13ad10 | 679 | * |
b4235b31 MP |
680 | * @li 1. remove leading "/" (or replace with "." if at end) |
681 | * | |
682 | * @li 2. remove leading ".." components (except those allowed by @p reldir) | |
683 | * | |
684 | * @li 3. delete any other "<dir>/.." (recursively) | |
ac13ad10 | 685 | * |
79452d46 | 686 | * Can only shrink paths, so sanitizes in place. |
ac13ad10 | 687 | * |
b5f9e67d | 688 | * While we're at it, remove double slashes and "." components like |
b4235b31 | 689 | * clean_fname() does, but DON'T remove a trailing slash because that |
b5f9e67d | 690 | * is sometimes significant on command line arguments. |
ac13ad10 | 691 | * |
b4235b31 | 692 | * If @p reldir is non-null, it is a sanitized directory that the path will be |
79452d46 DD |
693 | * relative to, so allow as many ".." at the beginning of the path as |
694 | * there are components in reldir. This is used for symbolic link targets. | |
695 | * If reldir is non-null and the path began with "/", to be completely like | |
696 | * a chroot we should add in depth levels of ".." at the beginning of the | |
697 | * path, but that would blow the assumption that the path doesn't grow and | |
698 | * it is not likely to end up being a valid symlink anyway, so just do | |
699 | * the normal removal of the leading "/" instead. | |
ac13ad10 | 700 | * |
1b8e662a DD |
701 | * Contributed by Dave Dykstra <dwd@bell-labs.com> |
702 | */ | |
cb13abfe | 703 | void sanitize_path(char *p, char *reldir) |
1b8e662a | 704 | { |
44e2e578 | 705 | char *start, *sanp; |
cb13abfe DD |
706 | int depth = 0; |
707 | int allowdotdot = 0; | |
708 | ||
709 | if (reldir) { | |
f9e5a0cd | 710 | int new_component = 1; |
cb13abfe | 711 | while (*reldir) { |
f9e5a0cd WD |
712 | if (*reldir++ == '/') |
713 | new_component = 1; | |
714 | else if (new_component) { | |
715 | new_component = 0; | |
cb13abfe DD |
716 | depth++; |
717 | } | |
718 | } | |
719 | } | |
44e2e578 DD |
720 | start = p; |
721 | sanp = p; | |
b5f9e67d DD |
722 | while (*p == '/') { |
723 | /* remove leading slashes */ | |
724 | p++; | |
725 | } | |
1b8e662a | 726 | while (*p != '\0') { |
b5f9e67d | 727 | /* this loop iterates once per filename component in p. |
44e2e578 | 728 | * both p (and sanp if the original had a slash) should |
b5f9e67d DD |
729 | * always be left pointing after a slash |
730 | */ | |
c284f34a | 731 | if (*p == '.' && (p[1] == '/' || p[1] == '\0')) { |
b5f9e67d DD |
732 | /* skip "." component */ |
733 | while (*++p == '/') { | |
734 | /* skip following slashes */ | |
735 | ; | |
736 | } | |
cb13abfe DD |
737 | continue; |
738 | } | |
739 | allowdotdot = 0; | |
c284f34a | 740 | if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) { |
cb13abfe | 741 | /* ".." component followed by slash or end */ |
c284f34a | 742 | if (depth > 0 && sanp == start) { |
cb13abfe DD |
743 | /* allow depth levels of .. at the beginning */ |
744 | --depth; | |
745 | allowdotdot = 1; | |
746 | } else { | |
747 | p += 2; | |
748 | if (*p == '/') | |
749 | p++; | |
750 | if (sanp != start) { | |
751 | /* back up sanp one level */ | |
752 | --sanp; /* now pointing at slash */ | |
c284f34a | 753 | while (sanp > start && sanp[-1] != '/') { |
cb13abfe DD |
754 | /* skip back up to slash */ |
755 | sanp--; | |
756 | } | |
b5f9e67d | 757 | } |
cb13abfe | 758 | continue; |
1b8e662a | 759 | } |
cb13abfe DD |
760 | } |
761 | while (1) { | |
762 | /* copy one component through next slash */ | |
763 | *sanp++ = *p++; | |
42509417 | 764 | if (*p == '\0' || p[-1] == '/') { |
cb13abfe DD |
765 | while (*p == '/') { |
766 | /* skip multiple slashes */ | |
767 | p++; | |
b5f9e67d | 768 | } |
cb13abfe | 769 | break; |
1b8e662a DD |
770 | } |
771 | } | |
cb13abfe DD |
772 | if (allowdotdot) { |
773 | /* move the virtual beginning to leave the .. alone */ | |
774 | start = sanp; | |
775 | } | |
1b8e662a | 776 | } |
c284f34a | 777 | if (sanp == start && !allowdotdot) { |
b5f9e67d | 778 | /* ended up with nothing, so put in "." component */ |
79452d46 DD |
779 | /* |
780 | * note that the !allowdotdot doesn't prevent this from | |
781 | * happening in all allowed ".." situations, but I didn't | |
782 | * think it was worth putting in an extra variable to ensure | |
783 | * it since an extra "." won't hurt in those situations. | |
784 | */ | |
44e2e578 | 785 | *sanp++ = '.'; |
b5f9e67d | 786 | } |
44e2e578 | 787 | *sanp = '\0'; |
1b8e662a DD |
788 | } |
789 | ||
14b61c63 WD |
790 | /* Works much like sanitize_path(), with these differences: (1) a new buffer |
791 | * is allocated for the sanitized path rather than modifying it in-place; (2) | |
792 | * a leading slash gets transformed into the rootdir value (which can be empty | |
793 | * or NULL if you just want the slash to get dropped); (3) no "reldir" can be | |
794 | * specified. */ | |
795 | char *alloc_sanitize_path(const char *path, const char *rootdir) | |
796 | { | |
797 | char *buf; | |
798 | int rlen, plen = strlen(path); | |
799 | ||
b05b3c9b | 800 | if (*path == '/' && rootdir) { |
14b61c63 | 801 | rlen = strlen(rootdir); |
b05b3c9b WD |
802 | if (rlen == 1) |
803 | path++; | |
804 | } else | |
14b61c63 WD |
805 | rlen = 0; |
806 | if (!(buf = new_array(char, rlen + plen + 1))) | |
807 | out_of_memory("alloc_sanitize_path"); | |
808 | if (rlen) | |
809 | memcpy(buf, rootdir, rlen); | |
810 | memcpy(buf + rlen, path, plen + 1); | |
811 | ||
b05b3c9b | 812 | if (rlen > 1) |
14b61c63 WD |
813 | rlen++; |
814 | sanitize_path(buf + rlen, NULL); | |
b05b3c9b WD |
815 | if (rlen && buf[rlen] == '.' && buf[rlen+1] == '\0') { |
816 | if (rlen > 1) | |
817 | rlen--; | |
818 | buf[rlen] = '\0'; | |
819 | } | |
14b61c63 WD |
820 | |
821 | return buf; | |
822 | } | |
5243c216 | 823 | |
4791825d | 824 | char curr_dir[MAXPATHLEN]; |
4af8fe4e | 825 | unsigned int curr_dir_len; |
5243c216 | 826 | |
4e5db0ad | 827 | /** |
a16d8f2b WD |
828 | * Like chdir(), but it keeps track of the current directory (in the |
829 | * global "curr_dir"), and ensures that the path size doesn't overflow. | |
830 | * Also cleans the path using the clean_fname() function. | |
4e5db0ad | 831 | **/ |
4af8fe4e | 832 | int push_dir(char *dir) |
5243c216 | 833 | { |
5243c216 | 834 | static int initialised; |
4af8fe4e | 835 | unsigned int len; |
5243c216 AT |
836 | |
837 | if (!initialised) { | |
838 | initialised = 1; | |
5cb37436 | 839 | getcwd(curr_dir, sizeof curr_dir - 1); |
4af8fe4e | 840 | curr_dir_len = strlen(curr_dir); |
5243c216 AT |
841 | } |
842 | ||
4af8fe4e WD |
843 | if (!dir) /* this call was probably just to initialize */ |
844 | return 0; | |
c226b7c2 | 845 | |
4af8fe4e WD |
846 | len = strlen(dir); |
847 | if (len == 1 && *dir == '.') | |
848 | return 1; | |
5243c216 | 849 | |
4af8fe4e WD |
850 | if ((*dir == '/' ? len : curr_dir_len + 1 + len) >= sizeof curr_dir) |
851 | return 0; | |
852 | ||
853 | if (chdir(dir)) | |
854 | return 0; | |
5243c216 AT |
855 | |
856 | if (*dir == '/') { | |
4af8fe4e WD |
857 | memcpy(curr_dir, dir, len + 1); |
858 | curr_dir_len = len; | |
859 | } else { | |
860 | curr_dir[curr_dir_len++] = '/'; | |
861 | memcpy(curr_dir + curr_dir_len, dir, len + 1); | |
862 | curr_dir_len += len; | |
5243c216 AT |
863 | } |
864 | ||
865 | clean_fname(curr_dir); | |
866 | ||
4af8fe4e | 867 | return 1; |
5243c216 AT |
868 | } |
869 | ||
a16d8f2b WD |
870 | /** |
871 | * Reverse a push_dir() call. You must pass in an absolute path | |
872 | * that was copied from a prior value of "curr_dir". | |
873 | **/ | |
5243c216 AT |
874 | int pop_dir(char *dir) |
875 | { | |
4af8fe4e WD |
876 | if (chdir(dir)) |
877 | return 0; | |
5243c216 | 878 | |
4af8fe4e WD |
879 | curr_dir_len = strlcpy(curr_dir, dir, sizeof curr_dir); |
880 | if (curr_dir_len >= sizeof curr_dir) | |
881 | curr_dir_len = sizeof curr_dir - 1; | |
5243c216 | 882 | |
4af8fe4e | 883 | return 1; |
5243c216 | 884 | } |
aa9b77a5 | 885 | |
eb61be19 WD |
886 | /** |
887 | * Return a quoted string with the full pathname of the indicated filename. | |
888 | * The string " (in MODNAME)" may also be appended. The returned pointer | |
889 | * remains valid until the next time full_fname() is called. | |
890 | **/ | |
9a5ade18 | 891 | char *full_fname(const char *fn) |
eb61be19 | 892 | { |
eb61be19 WD |
893 | static char *result = NULL; |
894 | char *m1, *m2, *m3; | |
895 | char *p1, *p2; | |
896 | ||
897 | if (result) | |
898 | free(result); | |
899 | ||
900 | if (*fn == '/') | |
901 | p1 = p2 = ""; | |
902 | else { | |
903 | p1 = curr_dir; | |
904 | p2 = "/"; | |
905 | } | |
906 | if (module_id >= 0) { | |
907 | m1 = " (in "; | |
908 | m2 = lp_name(module_id); | |
909 | m3 = ")"; | |
910 | if (*p1) { | |
911 | if (!lp_use_chroot(module_id)) { | |
912 | char *p = lp_path(module_id); | |
913 | if (*p != '/' || p[1]) | |
914 | p1 += strlen(p); | |
915 | } | |
916 | if (!*p1) | |
917 | p2++; | |
918 | else | |
919 | p1++; | |
920 | } | |
921 | else | |
922 | fn++; | |
923 | } else | |
924 | m1 = m2 = m3 = ""; | |
925 | ||
926 | asprintf(&result, "\"%s%s%s\"%s%s%s", p1, p2, fn, m1, m2, m3); | |
927 | ||
928 | return result; | |
929 | } | |
930 | ||
ac13ad10 | 931 | /** We need to supply our own strcmp function for file list comparisons |
aa9b77a5 AT |
932 | to ensure that signed/unsigned usage is consistent between machines. */ |
933 | int u_strcmp(const char *cs1, const char *cs2) | |
934 | { | |
5a788ade AT |
935 | const uchar *s1 = (const uchar *)cs1; |
936 | const uchar *s2 = (const uchar *)cs2; | |
aa9b77a5 AT |
937 | |
938 | while (*s1 && *s2 && (*s1 == *s2)) { | |
939 | s1++; s2++; | |
940 | } | |
5cb37436 | 941 | |
aa9b77a5 AT |
942 | return (int)*s1 - (int)*s2; |
943 | } | |
eb86d661 | 944 | |
4b957c22 | 945 | |
ac13ad10 MP |
946 | |
947 | /** | |
948 | * Determine if a symlink points outside the current directory tree. | |
036e70b0 MP |
949 | * This is considered "unsafe" because e.g. when mirroring somebody |
950 | * else's machine it might allow them to establish a symlink to | |
951 | * /etc/passwd, and then read it through a web server. | |
952 | * | |
4e5db0ad MP |
953 | * Null symlinks and absolute symlinks are always unsafe. |
954 | * | |
955 | * Basically here we are concerned with symlinks whose target contains | |
956 | * "..", because this might cause us to walk back up out of the | |
957 | * transferred directory. We are not allowed to go back up and | |
958 | * reenter. | |
959 | * | |
036e70b0 MP |
960 | * @param dest Target of the symlink in question. |
961 | * | |
25d34a5c | 962 | * @param src Top source directory currently applicable. Basically this |
036e70b0 | 963 | * is the first parameter to rsync in a simple invocation, but it's |
25d34a5c | 964 | * modified by flist.c in slightly complex ways. |
036e70b0 MP |
965 | * |
966 | * @retval True if unsafe | |
967 | * @retval False is unsafe | |
4e5db0ad MP |
968 | * |
969 | * @sa t_unsafe.c | |
ac13ad10 | 970 | **/ |
7afa3a4a | 971 | int unsafe_symlink(const char *dest, const char *src) |
4b957c22 | 972 | { |
7afa3a4a | 973 | const char *name, *slash; |
4b957c22 AT |
974 | int depth = 0; |
975 | ||
976 | /* all absolute and null symlinks are unsafe */ | |
7afa3a4a | 977 | if (!dest || !*dest || *dest == '/') return 1; |
4b957c22 AT |
978 | |
979 | /* find out what our safety margin is */ | |
7afa3a4a WD |
980 | for (name = src; (slash = strchr(name, '/')) != 0; name = slash+1) { |
981 | if (strncmp(name, "../", 3) == 0) { | |
c284f34a | 982 | depth = 0; |
7afa3a4a | 983 | } else if (strncmp(name, "./", 2) == 0) { |
4b957c22 AT |
984 | /* nothing */ |
985 | } else { | |
986 | depth++; | |
987 | } | |
988 | } | |
7afa3a4a WD |
989 | if (strcmp(name, "..") == 0) |
990 | depth = 0; | |
4b957c22 | 991 | |
7afa3a4a WD |
992 | for (name = dest; (slash = strchr(name, '/')) != 0; name = slash+1) { |
993 | if (strncmp(name, "../", 3) == 0) { | |
994 | /* if at any point we go outside the current directory | |
995 | then stop - it is unsafe */ | |
996 | if (--depth < 0) | |
997 | return 1; | |
998 | } else if (strncmp(name, "./", 2) == 0) { | |
4b957c22 AT |
999 | /* nothing */ |
1000 | } else { | |
1001 | depth++; | |
1002 | } | |
4b957c22 | 1003 | } |
7afa3a4a WD |
1004 | if (strcmp(name, "..") == 0) |
1005 | depth--; | |
4b957c22 | 1006 | |
4b957c22 AT |
1007 | return (depth < 0); |
1008 | } | |
375a4556 | 1009 | |
f7632fc6 | 1010 | |
ac13ad10 | 1011 | /** |
b4235b31 MP |
1012 | * Return the date and time as a string |
1013 | **/ | |
f7632fc6 AT |
1014 | char *timestring(time_t t) |
1015 | { | |
1016 | static char TimeBuf[200]; | |
1017 | struct tm *tm = localtime(&t); | |
1018 | ||
1019 | #ifdef HAVE_STRFTIME | |
5cb37436 | 1020 | strftime(TimeBuf, sizeof TimeBuf - 1, "%Y/%m/%d %H:%M:%S", tm); |
f7632fc6 | 1021 | #else |
5cb37436 | 1022 | strlcpy(TimeBuf, asctime(tm), sizeof TimeBuf); |
f7632fc6 AT |
1023 | #endif |
1024 | ||
1025 | if (TimeBuf[strlen(TimeBuf)-1] == '\n') { | |
1026 | TimeBuf[strlen(TimeBuf)-1] = 0; | |
1027 | } | |
1028 | ||
1029 | return(TimeBuf); | |
1030 | } | |
1031 | ||
9ec16c83 | 1032 | |
e1bd49d6 MP |
1033 | /** |
1034 | * Sleep for a specified number of milliseconds. | |
1035 | * | |
1036 | * Always returns TRUE. (In the future it might return FALSE if | |
1037 | * interrupted.) | |
1038 | **/ | |
1039 | int msleep(int t) | |
9ec16c83 | 1040 | { |
c284f34a WD |
1041 | int tdiff = 0; |
1042 | struct timeval tval, t1, t2; | |
9ec16c83 AT |
1043 | |
1044 | gettimeofday(&t1, NULL); | |
5cb37436 | 1045 | |
9ec16c83 AT |
1046 | while (tdiff < t) { |
1047 | tval.tv_sec = (t-tdiff)/1000; | |
1048 | tval.tv_usec = 1000*((t-tdiff)%1000); | |
5cb37436 | 1049 | |
9ec16c83 AT |
1050 | errno = 0; |
1051 | select(0,NULL,NULL, NULL, &tval); | |
1052 | ||
1053 | gettimeofday(&t2, NULL); | |
5cb37436 | 1054 | tdiff = (t2.tv_sec - t1.tv_sec)*1000 + |
9ec16c83 AT |
1055 | (t2.tv_usec - t1.tv_usec)/1000; |
1056 | } | |
e1bd49d6 MP |
1057 | |
1058 | return True; | |
9ec16c83 AT |
1059 | } |
1060 | ||
1061 | ||
ac13ad10 MP |
1062 | /** |
1063 | * Determine if two file modification times are equivalent (either | |
1064 | * exact or in the modification timestamp window established by | |
1065 | * --modify-window). | |
1066 | * | |
1067 | * @retval 0 if the times should be treated as the same | |
1068 | * | |
1069 | * @retval +1 if the first is later | |
1070 | * | |
1071 | * @retval -1 if the 2nd is later | |
1072 | **/ | |
5b56cc19 AT |
1073 | int cmp_modtime(time_t file1, time_t file2) |
1074 | { | |
5b56cc19 | 1075 | if (file2 > file1) { |
bc6ebcd2 WD |
1076 | if (file2 - file1 <= modify_window) |
1077 | return 0; | |
5b56cc19 AT |
1078 | return -1; |
1079 | } | |
bc6ebcd2 WD |
1080 | if (file1 - file2 <= modify_window) |
1081 | return 0; | |
5b56cc19 AT |
1082 | return 1; |
1083 | } | |
1084 | ||
1085 | ||
1086 | #ifdef __INSURE__XX | |
0f8f98c8 AT |
1087 | #include <dlfcn.h> |
1088 | ||
ac13ad10 MP |
1089 | /** |
1090 | This routine is a trick to immediately catch errors when debugging | |
1091 | with insure. A xterm with a gdb is popped up when insure catches | |
1092 | a error. It is Linux specific. | |
1093 | **/ | |
0f8f98c8 AT |
1094 | int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6) |
1095 | { | |
1096 | static int (*fn)(); | |
1097 | int ret; | |
8950ac03 | 1098 | char *cmd; |
0f8f98c8 | 1099 | |
5cb37436 | 1100 | asprintf(&cmd, "/usr/X11R6/bin/xterm -display :0 -T Panic -n Panic -e /bin/sh -c 'cat /tmp/ierrs.*.%d ; gdb /proc/%d/exe %d'", |
0f8f98c8 AT |
1101 | getpid(), getpid(), getpid()); |
1102 | ||
1103 | if (!fn) { | |
1104 | static void *h; | |
1105 | h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY); | |
1106 | fn = dlsym(h, "_Insure_trap_error"); | |
1107 | } | |
1108 | ||
1109 | ret = fn(a1, a2, a3, a4, a5, a6); | |
1110 | ||
1111 | system(cmd); | |
1112 | ||
8950ac03 AT |
1113 | free(cmd); |
1114 | ||
0f8f98c8 AT |
1115 | return ret; |
1116 | } | |
1117 | #endif | |
58cadc86 WD |
1118 | |
1119 | ||
1120 | #define MALLOC_MAX 0x40000000 | |
1121 | ||
1122 | void *_new_array(unsigned int size, unsigned long num) | |
1123 | { | |
1124 | if (num >= MALLOC_MAX/size) | |
1125 | return NULL; | |
1126 | return malloc(size * num); | |
1127 | } | |
1128 | ||
1129 | void *_realloc_array(void *ptr, unsigned int size, unsigned long num) | |
1130 | { | |
1131 | if (num >= MALLOC_MAX/size) | |
1132 | return NULL; | |
1133 | /* No realloc should need this, but just in case... */ | |
1134 | if (!ptr) | |
1135 | return malloc(size * num); | |
1136 | return realloc(ptr, size * num); | |
1137 | } |