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