Commit | Line | Data |
---|---|---|
c627d613 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1996 | |
3 | Copyright (C) Paul Mackerras 1996 | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | /* | |
21 | Utilities used in rsync | |
22 | ||
23 | tridge, June 1996 | |
24 | */ | |
25 | #include "rsync.h" | |
26 | ||
c7c11a0d DD |
27 | extern int verbose; |
28 | ||
f0359dd0 AT |
29 | |
30 | /**************************************************************************** | |
36349ea0 | 31 | Set a fd into nonblocking mode |
f0359dd0 AT |
32 | ****************************************************************************/ |
33 | void set_nonblocking(int fd) | |
34 | { | |
35 | int val; | |
36 | ||
37 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
38 | return; | |
39 | if (!(val & NONBLOCK_FLAG)) { | |
40 | val |= NONBLOCK_FLAG; | |
41 | fcntl(fd, F_SETFL, val); | |
42 | } | |
43 | } | |
44 | ||
36349ea0 AT |
45 | /**************************************************************************** |
46 | Set a fd into blocking mode | |
47 | ****************************************************************************/ | |
48 | void set_blocking(int fd) | |
49 | { | |
50 | int val; | |
51 | ||
52 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
53 | return; | |
54 | if (val & NONBLOCK_FLAG) { | |
55 | val &= ~NONBLOCK_FLAG; | |
56 | fcntl(fd, F_SETFL, val); | |
57 | } | |
58 | } | |
59 | ||
f0359dd0 AT |
60 | |
61 | /* create a file descriptor pair - like pipe() but use socketpair if | |
62 | possible (because of blocking issues on pipes) | |
63 | ||
64 | always set non-blocking | |
65 | */ | |
08f15335 AT |
66 | int fd_pair(int fd[2]) |
67 | { | |
f0359dd0 AT |
68 | int ret; |
69 | ||
08f15335 | 70 | #if HAVE_SOCKETPAIR |
f0359dd0 | 71 | ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd); |
08f15335 | 72 | #else |
f0359dd0 | 73 | ret = pipe(fd); |
08f15335 | 74 | #endif |
f0359dd0 AT |
75 | |
76 | if (ret == 0) { | |
77 | set_nonblocking(fd[0]); | |
78 | set_nonblocking(fd[1]); | |
79 | } | |
80 | ||
81 | return ret; | |
08f15335 AT |
82 | } |
83 | ||
84 | ||
36349ea0 | 85 | /* this is derived from CVS code */ |
c627d613 AT |
86 | int piped_child(char **command,int *f_in,int *f_out) |
87 | { | |
88 | int pid; | |
89 | int to_child_pipe[2]; | |
90 | int from_child_pipe[2]; | |
c80ccabb | 91 | extern int blocking_io; |
c627d613 | 92 | |
08f15335 AT |
93 | if (fd_pair(to_child_pipe) < 0 || |
94 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 95 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 96 | exit_cleanup(RERR_IPC); |
c627d613 AT |
97 | } |
98 | ||
99 | ||
3ba62a83 | 100 | pid = do_fork(); |
c627d613 | 101 | if (pid < 0) { |
9486289c | 102 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 103 | exit_cleanup(RERR_IPC); |
c627d613 AT |
104 | } |
105 | ||
106 | if (pid == 0) | |
107 | { | |
6574b4f7 | 108 | extern int orig_umask; |
c627d613 AT |
109 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || |
110 | close(to_child_pipe[1]) < 0 || | |
111 | close(from_child_pipe[0]) < 0 || | |
112 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 113 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 114 | exit_cleanup(RERR_IPC); |
c627d613 | 115 | } |
773f2bd4 AT |
116 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); |
117 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
6574b4f7 | 118 | umask(orig_umask); |
36349ea0 | 119 | set_blocking(STDIN_FILENO); |
c80ccabb AT |
120 | if (blocking_io) { |
121 | set_blocking(STDOUT_FILENO); | |
122 | } | |
c627d613 | 123 | execvp(command[0], command); |
9486289c | 124 | rprintf(FERROR,"Failed to exec %s : %s\n", |
c627d613 | 125 | command[0],strerror(errno)); |
65417579 | 126 | exit_cleanup(RERR_IPC); |
c627d613 AT |
127 | } |
128 | ||
129 | if (close(from_child_pipe[1]) < 0 || | |
130 | close(to_child_pipe[0]) < 0) { | |
9486289c | 131 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 132 | exit_cleanup(RERR_IPC); |
c627d613 AT |
133 | } |
134 | ||
135 | *f_in = from_child_pipe[0]; | |
136 | *f_out = to_child_pipe[1]; | |
3eb38818 | 137 | |
c627d613 AT |
138 | return pid; |
139 | } | |
140 | ||
366345fe AT |
141 | int local_child(int argc, char **argv,int *f_in,int *f_out) |
142 | { | |
143 | int pid; | |
144 | int to_child_pipe[2]; | |
145 | int from_child_pipe[2]; | |
146 | ||
08f15335 AT |
147 | if (fd_pair(to_child_pipe) < 0 || |
148 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 149 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 150 | exit_cleanup(RERR_IPC); |
366345fe AT |
151 | } |
152 | ||
153 | ||
154 | pid = do_fork(); | |
155 | if (pid < 0) { | |
9486289c | 156 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 157 | exit_cleanup(RERR_IPC); |
366345fe AT |
158 | } |
159 | ||
160 | if (pid == 0) { | |
161 | extern int am_sender; | |
162 | extern int am_server; | |
163 | ||
164 | am_sender = !am_sender; | |
165 | am_server = 1; | |
166 | ||
167 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
168 | close(to_child_pipe[1]) < 0 || | |
169 | close(from_child_pipe[0]) < 0 || | |
170 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 171 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 172 | exit_cleanup(RERR_IPC); |
366345fe AT |
173 | } |
174 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); | |
175 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
9486289c | 176 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
366345fe AT |
177 | } |
178 | ||
179 | if (close(from_child_pipe[1]) < 0 || | |
180 | close(to_child_pipe[0]) < 0) { | |
9486289c | 181 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 182 | exit_cleanup(RERR_IPC); |
366345fe AT |
183 | } |
184 | ||
185 | *f_in = from_child_pipe[0]; | |
186 | *f_out = to_child_pipe[1]; | |
187 | ||
188 | return pid; | |
189 | } | |
190 | ||
191 | ||
c627d613 AT |
192 | |
193 | void out_of_memory(char *str) | |
194 | { | |
9486289c | 195 | rprintf(FERROR,"ERROR: out of memory in %s\n",str); |
65417579 | 196 | exit_cleanup(RERR_MALLOC); |
575f2fca AT |
197 | } |
198 | ||
199 | void overflow(char *str) | |
200 | { | |
9486289c | 201 | rprintf(FERROR,"ERROR: buffer overflow in %s\n",str); |
65417579 | 202 | exit_cleanup(RERR_MALLOC); |
c627d613 AT |
203 | } |
204 | ||
205 | ||
c627d613 AT |
206 | |
207 | int set_modtime(char *fname,time_t modtime) | |
208 | { | |
31e12522 AT |
209 | extern int dry_run; |
210 | if (dry_run) return 0; | |
211 | { | |
1e9f155a | 212 | #ifdef HAVE_UTIMBUF |
31e12522 AT |
213 | struct utimbuf tbuf; |
214 | tbuf.actime = time(NULL); | |
215 | tbuf.modtime = modtime; | |
216 | return utime(fname,&tbuf); | |
c627d613 | 217 | #elif defined(HAVE_UTIME) |
31e12522 AT |
218 | time_t t[2]; |
219 | t[0] = time(NULL); | |
220 | t[1] = modtime; | |
221 | return utime(fname,t); | |
c627d613 | 222 | #else |
31e12522 AT |
223 | struct timeval t[2]; |
224 | t[0].tv_sec = time(NULL); | |
225 | t[0].tv_usec = 0; | |
226 | t[1].tv_sec = modtime; | |
227 | t[1].tv_usec = 0; | |
228 | return utimes(fname,t); | |
c627d613 | 229 | #endif |
31e12522 | 230 | } |
c627d613 | 231 | } |
94481d91 | 232 | |
720b47f2 | 233 | |
6574b4f7 AT |
234 | /**************************************************************************** |
235 | create any necessary directories in fname. Unfortunately we don't know | |
236 | what perms to give the directory when this is called so we need to rely | |
237 | on the umask | |
238 | ****************************************************************************/ | |
239 | int create_directory_path(char *fname) | |
240 | { | |
241 | extern int orig_umask; | |
242 | char *p; | |
243 | ||
244 | while (*fname == '/') fname++; | |
245 | while (strncmp(fname,"./",2)==0) fname += 2; | |
246 | ||
247 | p = fname; | |
248 | while ((p=strchr(p,'/'))) { | |
249 | *p = 0; | |
1b2d733a | 250 | do_mkdir(fname,0777 & ~orig_umask); |
6574b4f7 AT |
251 | *p = '/'; |
252 | p++; | |
253 | } | |
254 | return 0; | |
255 | } | |
950ab32d AT |
256 | |
257 | ||
258 | /* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted. | |
259 | Return LEN upon success, write's (negative) error code otherwise. | |
260 | ||
261 | derived from GNU C's cccp.c. | |
262 | */ | |
a5343e76 | 263 | static int full_write(int desc, char *ptr, int len) |
950ab32d AT |
264 | { |
265 | int total_written; | |
266 | ||
267 | total_written = 0; | |
268 | while (len > 0) { | |
269 | int written = write (desc, ptr, len); | |
270 | if (written < 0) { | |
271 | #ifdef EINTR | |
272 | if (errno == EINTR) | |
273 | continue; | |
274 | #endif | |
275 | return written; | |
276 | } | |
277 | total_written += written; | |
278 | ptr += written; | |
279 | len -= written; | |
280 | } | |
281 | return total_written; | |
282 | } | |
283 | ||
284 | /* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted. | |
285 | Return the actual number of bytes read, zero for EOF, or negative | |
286 | for an error. | |
287 | ||
288 | derived from GNU C's cccp.c. */ | |
6e4fb64e | 289 | static int safe_read(int desc, char *ptr, int len) |
950ab32d AT |
290 | { |
291 | int n_chars; | |
292 | ||
293 | if (len <= 0) | |
294 | return len; | |
295 | ||
296 | #ifdef EINTR | |
297 | do { | |
298 | n_chars = read(desc, ptr, len); | |
299 | } while (n_chars < 0 && errno == EINTR); | |
300 | #else | |
301 | n_chars = read(desc, ptr, len); | |
302 | #endif | |
303 | ||
304 | return n_chars; | |
305 | } | |
306 | ||
307 | ||
308 | /* copy a file - this is used in conjunction with the --temp-dir option */ | |
309 | int copy_file(char *source, char *dest, mode_t mode) | |
310 | { | |
311 | int ifd; | |
312 | int ofd; | |
313 | char buf[1024 * 8]; | |
314 | int len; /* Number of bytes read into `buf'. */ | |
315 | ||
8c9fd200 | 316 | ifd = do_open(source, O_RDONLY, 0); |
950ab32d | 317 | if (ifd == -1) { |
9486289c | 318 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
319 | source,strerror(errno)); |
320 | return -1; | |
321 | } | |
322 | ||
c7c11a0d | 323 | if (robust_unlink(dest) && errno != ENOENT) { |
9486289c | 324 | rprintf(FERROR,"unlink %s: %s\n", |
950ab32d AT |
325 | dest,strerror(errno)); |
326 | return -1; | |
327 | } | |
328 | ||
31e12522 | 329 | ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode); |
c46ded46 | 330 | if (ofd == -1) { |
9486289c | 331 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
332 | dest,strerror(errno)); |
333 | close(ifd); | |
334 | return -1; | |
335 | } | |
336 | ||
337 | while ((len = safe_read(ifd, buf, sizeof(buf))) > 0) { | |
338 | if (full_write(ofd, buf, len) < 0) { | |
9486289c | 339 | rprintf(FERROR,"write %s: %s\n", |
950ab32d AT |
340 | dest,strerror(errno)); |
341 | close(ifd); | |
342 | close(ofd); | |
343 | return -1; | |
344 | } | |
345 | } | |
346 | ||
347 | close(ifd); | |
348 | close(ofd); | |
349 | ||
350 | if (len < 0) { | |
9486289c | 351 | rprintf(FERROR,"read %s: %s\n", |
950ab32d AT |
352 | source,strerror(errno)); |
353 | return -1; | |
354 | } | |
355 | ||
356 | return 0; | |
357 | } | |
feaa89c4 | 358 | |
c7c11a0d DD |
359 | /* |
360 | Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so | |
361 | rename to <path>/.rsyncNNN instead. Note that successive rsync runs | |
362 | will shuffle the filenames around a bit as long as the file is still | |
363 | busy; this is because this function does not know if the unlink call | |
364 | is due to a new file coming in, or --delete trying to remove old | |
365 | .rsyncNNN files, hence it renames it each time. | |
366 | */ | |
367 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ | |
368 | #define MAX_RENAMES_DIGITS 3 | |
369 | #define MAX_RENAMES 1000 | |
370 | ||
371 | int robust_unlink(char *fname) | |
372 | { | |
373 | #ifndef ETXTBSY | |
374 | return do_unlink(fname); | |
375 | #else | |
376 | static int counter = 1; | |
377 | int rc, pos, start; | |
378 | char path[MAXPATHLEN]; | |
379 | ||
380 | rc = do_unlink(fname); | |
381 | if ((rc == 0) || (errno != ETXTBSY)) | |
382 | return rc; | |
383 | ||
384 | strlcpy(path, fname, MAXPATHLEN); | |
385 | ||
386 | pos = strlen(path); | |
387 | while((path[--pos] != '/') && (pos >= 0)) | |
388 | ; | |
389 | ++pos; | |
390 | strlcpy(&path[pos], ".rsync", MAXPATHLEN-pos); | |
391 | pos += sizeof(".rsync")-1; | |
392 | ||
393 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
394 | errno = ETXTBSY; | |
395 | return -1; | |
396 | } | |
397 | ||
398 | /* start where the last one left off to reduce chance of clashes */ | |
399 | start = counter; | |
400 | do { | |
401 | sprintf(&path[pos], "%03d", counter); | |
402 | if (++counter >= MAX_RENAMES) | |
403 | counter = 1; | |
404 | } while (((rc = access(path, 0)) == 0) && (counter != start)); | |
405 | ||
406 | if (verbose > 0) | |
407 | rprintf(FINFO,"renaming %s to %s because of text busy\n", | |
408 | fname, path); | |
409 | ||
410 | /* maybe we should return rename()'s exit status? Nah. */ | |
411 | if (do_rename(fname, path) != 0) { | |
412 | errno = ETXTBSY; | |
413 | return -1; | |
414 | } | |
415 | return 0; | |
416 | #endif | |
417 | } | |
418 | ||
419 | int robust_rename(char *from, char *to) | |
420 | { | |
421 | #ifndef ETXTBSY | |
422 | return do_rename(from, to); | |
423 | #else | |
424 | int rc = do_rename(from, to); | |
425 | if ((rc == 0) || (errno != ETXTBSY)) | |
426 | return rc; | |
427 | if (robust_unlink(to) != 0) | |
428 | return -1; | |
429 | return do_rename(from, to); | |
430 | #endif | |
feaa89c4 | 431 | } |
3ba62a83 AT |
432 | |
433 | ||
434 | static pid_t all_pids[10]; | |
435 | static int num_pids; | |
436 | ||
437 | /* fork and record the pid of the child */ | |
438 | pid_t do_fork(void) | |
439 | { | |
440 | pid_t newpid = fork(); | |
441 | ||
442 | if (newpid) { | |
443 | all_pids[num_pids++] = newpid; | |
444 | } | |
445 | return newpid; | |
446 | } | |
447 | ||
448 | /* kill all children */ | |
449 | void kill_all(int sig) | |
450 | { | |
451 | int i; | |
452 | for (i=0;i<num_pids;i++) { | |
453 | if (all_pids[i] != getpid()) | |
454 | kill(all_pids[i], sig); | |
455 | } | |
456 | } | |
9486289c | 457 | |
8ef4ffd6 AT |
458 | /* turn a user name into a uid */ |
459 | int name_to_uid(char *name, uid_t *uid) | |
460 | { | |
461 | struct passwd *pass; | |
462 | if (!name || !*name) return 0; | |
463 | pass = getpwnam(name); | |
464 | if (pass) { | |
465 | *uid = pass->pw_uid; | |
466 | return 1; | |
467 | } | |
468 | return 0; | |
469 | } | |
470 | ||
471 | /* turn a group name into a gid */ | |
472 | int name_to_gid(char *name, gid_t *gid) | |
473 | { | |
474 | struct group *grp; | |
475 | if (!name || !*name) return 0; | |
476 | grp = getgrnam(name); | |
477 | if (grp) { | |
478 | *gid = grp->gr_gid; | |
479 | return 1; | |
480 | } | |
481 | return 0; | |
482 | } | |
483 | ||
ff8b29b8 | 484 | |
31593dd6 AT |
485 | /* lock a byte range in a open file */ |
486 | int lock_range(int fd, int offset, int len) | |
0c515f17 | 487 | { |
31593dd6 | 488 | struct flock lock; |
0c515f17 | 489 | |
31593dd6 AT |
490 | lock.l_type = F_WRLCK; |
491 | lock.l_whence = SEEK_SET; | |
492 | lock.l_start = offset; | |
493 | lock.l_len = len; | |
494 | lock.l_pid = 0; | |
495 | ||
496 | return fcntl(fd,F_SETLK,&lock) == 0; | |
0c515f17 | 497 | } |
874895d5 AT |
498 | |
499 | ||
cb13abfe | 500 | static void glob_expand_one(char *s, char **argv, int *argc, int maxargs) |
874895d5 | 501 | { |
932be9aa | 502 | #if !(defined(HAVE_GLOB) && defined(HAVE_GLOB_H)) |
e42c9458 | 503 | if (!*s) s = "."; |
087bf010 | 504 | argv[*argc] = strdup(s); |
874895d5 AT |
505 | (*argc)++; |
506 | return; | |
507 | #else | |
cb13abfe | 508 | extern int sanitize_paths; |
874895d5 AT |
509 | glob_t globbuf; |
510 | int i; | |
511 | ||
e42c9458 AT |
512 | if (!*s) s = "."; |
513 | ||
cb13abfe DD |
514 | argv[*argc] = strdup(s); |
515 | if (sanitize_paths) { | |
516 | sanitize_path(argv[*argc], NULL); | |
517 | } | |
087bf010 | 518 | |
874895d5 AT |
519 | memset(&globbuf, 0, sizeof(globbuf)); |
520 | glob(argv[*argc], 0, NULL, &globbuf); | |
521 | if (globbuf.gl_pathc == 0) { | |
522 | (*argc)++; | |
523 | globfree(&globbuf); | |
524 | return; | |
525 | } | |
526 | for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) { | |
527 | if (i == 0) free(argv[*argc]); | |
528 | argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]); | |
529 | if (!argv[(*argc) + i]) out_of_memory("glob_expand"); | |
530 | } | |
531 | globfree(&globbuf); | |
532 | (*argc) += i; | |
533 | #endif | |
534 | } | |
5a96ee05 | 535 | |
cb13abfe | 536 | void glob_expand(char *base1, char **argv, int *argc, int maxargs) |
087bf010 AT |
537 | { |
538 | char *s = argv[*argc]; | |
539 | char *p, *q; | |
ba5e128d | 540 | char *base = base1; |
087bf010 AT |
541 | |
542 | if (!s || !*s) return; | |
543 | ||
e42c9458 AT |
544 | if (strncmp(s, base, strlen(base)) == 0) { |
545 | s += strlen(base); | |
546 | } | |
547 | ||
087bf010 AT |
548 | s = strdup(s); |
549 | if (!s) out_of_memory("glob_expand"); | |
550 | ||
ba5e128d AT |
551 | base = (char *)malloc(strlen(base1)+3); |
552 | if (!base) out_of_memory("glob_expand"); | |
553 | ||
554 | sprintf(base," %s/", base1); | |
555 | ||
087bf010 AT |
556 | q = s; |
557 | while ((p = strstr(q,base)) && ((*argc) < maxargs)) { | |
ba5e128d AT |
558 | /* split it at this point */ |
559 | *p = 0; | |
cb13abfe | 560 | glob_expand_one(q, argv, argc, maxargs); |
ba5e128d | 561 | q = p+strlen(base); |
087bf010 AT |
562 | } |
563 | ||
cb13abfe | 564 | if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs); |
087bf010 AT |
565 | |
566 | free(s); | |
ba5e128d | 567 | free(base); |
087bf010 | 568 | } |
5a96ee05 AT |
569 | |
570 | /******************************************************************* | |
571 | convert a string to lower case | |
572 | ********************************************************************/ | |
573 | void strlower(char *s) | |
574 | { | |
575 | while (*s) { | |
576 | if (isupper(*s)) *s = tolower(*s); | |
577 | s++; | |
578 | } | |
579 | } | |
e42c9458 | 580 | |
37f9805d AT |
581 | /* this is like vsnprintf but it always null terminates, so you |
582 | can fit at most n-1 chars in */ | |
e42c9458 AT |
583 | int vslprintf(char *str, int n, const char *format, va_list ap) |
584 | { | |
e42c9458 | 585 | int ret = vsnprintf(str, n, format, ap); |
37f9805d AT |
586 | if (ret >= n || ret < 0) { |
587 | str[n-1] = 0; | |
e42c9458 AT |
588 | return -1; |
589 | } | |
590 | str[ret] = 0; | |
591 | return ret; | |
e42c9458 AT |
592 | } |
593 | ||
594 | ||
595 | /* like snprintf but always null terminates */ | |
596 | int slprintf(char *str, int n, char *format, ...) | |
597 | { | |
598 | va_list ap; | |
599 | int ret; | |
600 | ||
601 | va_start(ap, format); | |
602 | ret = vslprintf(str,n,format,ap); | |
603 | va_end(ap); | |
604 | return ret; | |
605 | } | |
8d9dc9f9 | 606 | |
fe8c0a98 AT |
607 | |
608 | void *Realloc(void *p, int size) | |
609 | { | |
610 | if (!p) return (void *)malloc(size); | |
611 | return (void *)realloc(p, size); | |
612 | } | |
5243c216 AT |
613 | |
614 | ||
615 | void clean_fname(char *name) | |
616 | { | |
617 | char *p; | |
618 | int l; | |
619 | int modified = 1; | |
620 | ||
621 | if (!name) return; | |
622 | ||
623 | while (modified) { | |
624 | modified = 0; | |
625 | ||
626 | if ((p=strstr(name,"/./"))) { | |
627 | modified = 1; | |
628 | while (*p) { | |
629 | p[0] = p[2]; | |
630 | p++; | |
631 | } | |
632 | } | |
633 | ||
634 | if ((p=strstr(name,"//"))) { | |
635 | modified = 1; | |
636 | while (*p) { | |
637 | p[0] = p[1]; | |
638 | p++; | |
639 | } | |
640 | } | |
641 | ||
642 | if (strncmp(p=name,"./",2) == 0) { | |
643 | modified = 1; | |
644 | do { | |
645 | p[0] = p[2]; | |
646 | } while (*p++); | |
647 | } | |
648 | ||
649 | l = strlen(p=name); | |
650 | if (l > 1 && p[l-1] == '/') { | |
651 | modified = 1; | |
652 | p[l-1] = 0; | |
653 | } | |
654 | } | |
655 | } | |
656 | ||
1b8e662a DD |
657 | /* |
658 | * Make path appear as if a chroot had occurred: | |
1b8e662a | 659 | * 1. remove leading "/" (or replace with "." if at end) |
cb13abfe | 660 | * 2. remove leading ".." components (except those allowed by "reldir") |
1b8e662a | 661 | * 3. delete any other "<dir>/.." (recursively) |
79452d46 | 662 | * Can only shrink paths, so sanitizes in place. |
b5f9e67d DD |
663 | * While we're at it, remove double slashes and "." components like |
664 | * clean_fname does(), but DON'T remove a trailing slash because that | |
665 | * is sometimes significant on command line arguments. | |
79452d46 DD |
666 | * If "reldir" is non-null, it is a sanitized directory that the path will be |
667 | * relative to, so allow as many ".." at the beginning of the path as | |
668 | * there are components in reldir. This is used for symbolic link targets. | |
669 | * If reldir is non-null and the path began with "/", to be completely like | |
670 | * a chroot we should add in depth levels of ".." at the beginning of the | |
671 | * path, but that would blow the assumption that the path doesn't grow and | |
672 | * it is not likely to end up being a valid symlink anyway, so just do | |
673 | * the normal removal of the leading "/" instead. | |
1b8e662a DD |
674 | * Contributed by Dave Dykstra <dwd@bell-labs.com> |
675 | */ | |
676 | ||
cb13abfe | 677 | void sanitize_path(char *p, char *reldir) |
1b8e662a | 678 | { |
44e2e578 | 679 | char *start, *sanp; |
cb13abfe DD |
680 | int depth = 0; |
681 | int allowdotdot = 0; | |
682 | ||
683 | if (reldir) { | |
684 | depth++; | |
685 | while (*reldir) { | |
686 | if (*reldir++ == '/') { | |
687 | depth++; | |
688 | } | |
689 | } | |
690 | } | |
44e2e578 DD |
691 | start = p; |
692 | sanp = p; | |
b5f9e67d DD |
693 | while (*p == '/') { |
694 | /* remove leading slashes */ | |
695 | p++; | |
696 | } | |
1b8e662a | 697 | while (*p != '\0') { |
b5f9e67d | 698 | /* this loop iterates once per filename component in p. |
44e2e578 | 699 | * both p (and sanp if the original had a slash) should |
b5f9e67d DD |
700 | * always be left pointing after a slash |
701 | */ | |
702 | if ((*p == '.') && ((*(p+1) == '/') || (*(p+1) == '\0'))) { | |
703 | /* skip "." component */ | |
704 | while (*++p == '/') { | |
705 | /* skip following slashes */ | |
706 | ; | |
707 | } | |
cb13abfe DD |
708 | continue; |
709 | } | |
710 | allowdotdot = 0; | |
711 | if ((*p == '.') && (*(p+1) == '.') && | |
1b8e662a | 712 | ((*(p+2) == '/') || (*(p+2) == '\0'))) { |
cb13abfe DD |
713 | /* ".." component followed by slash or end */ |
714 | if ((depth > 0) && (sanp == start)) { | |
715 | /* allow depth levels of .. at the beginning */ | |
716 | --depth; | |
717 | allowdotdot = 1; | |
718 | } else { | |
719 | p += 2; | |
720 | if (*p == '/') | |
721 | p++; | |
722 | if (sanp != start) { | |
723 | /* back up sanp one level */ | |
724 | --sanp; /* now pointing at slash */ | |
725 | while ((sanp > start) && (*(sanp - 1) != '/')) { | |
726 | /* skip back up to slash */ | |
727 | sanp--; | |
728 | } | |
b5f9e67d | 729 | } |
cb13abfe | 730 | continue; |
1b8e662a | 731 | } |
cb13abfe DD |
732 | } |
733 | while (1) { | |
734 | /* copy one component through next slash */ | |
735 | *sanp++ = *p++; | |
736 | if ((*p == '\0') || (*(p-1) == '/')) { | |
737 | while (*p == '/') { | |
738 | /* skip multiple slashes */ | |
739 | p++; | |
b5f9e67d | 740 | } |
cb13abfe | 741 | break; |
1b8e662a DD |
742 | } |
743 | } | |
cb13abfe DD |
744 | if (allowdotdot) { |
745 | /* move the virtual beginning to leave the .. alone */ | |
746 | start = sanp; | |
747 | } | |
1b8e662a | 748 | } |
cb13abfe | 749 | if ((sanp == start) && !allowdotdot) { |
b5f9e67d | 750 | /* ended up with nothing, so put in "." component */ |
79452d46 DD |
751 | /* |
752 | * note that the !allowdotdot doesn't prevent this from | |
753 | * happening in all allowed ".." situations, but I didn't | |
754 | * think it was worth putting in an extra variable to ensure | |
755 | * it since an extra "." won't hurt in those situations. | |
756 | */ | |
44e2e578 | 757 | *sanp++ = '.'; |
b5f9e67d | 758 | } |
44e2e578 | 759 | *sanp = '\0'; |
1b8e662a DD |
760 | } |
761 | ||
5243c216 AT |
762 | |
763 | static char curr_dir[MAXPATHLEN]; | |
764 | ||
765 | /* like chdir() but can be reversed with pop_dir() if save is set. It | |
766 | is also much faster as it remembers where we have been */ | |
767 | char *push_dir(char *dir, int save) | |
768 | { | |
769 | char *ret = curr_dir; | |
770 | static int initialised; | |
771 | ||
772 | if (!initialised) { | |
773 | initialised = 1; | |
774 | getcwd(curr_dir, sizeof(curr_dir)-1); | |
775 | } | |
776 | ||
c226b7c2 DD |
777 | if (!dir) return NULL; /* this call was probably just to initialize */ |
778 | ||
5243c216 AT |
779 | if (chdir(dir)) return NULL; |
780 | ||
781 | if (save) { | |
782 | ret = strdup(curr_dir); | |
783 | } | |
784 | ||
785 | if (*dir == '/') { | |
37f9805d | 786 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 | 787 | } else { |
37f9805d AT |
788 | strlcat(curr_dir,"/", sizeof(curr_dir)); |
789 | strlcat(curr_dir,dir, sizeof(curr_dir)); | |
5243c216 AT |
790 | } |
791 | ||
792 | clean_fname(curr_dir); | |
793 | ||
794 | return ret; | |
795 | } | |
796 | ||
797 | /* reverse a push_dir call */ | |
798 | int pop_dir(char *dir) | |
799 | { | |
800 | int ret; | |
801 | ||
802 | ret = chdir(dir); | |
803 | if (ret) { | |
804 | free(dir); | |
805 | return ret; | |
806 | } | |
807 | ||
37f9805d | 808 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 AT |
809 | |
810 | free(dir); | |
811 | ||
812 | return 0; | |
813 | } | |
aa9b77a5 AT |
814 | |
815 | /* we need to supply our own strcmp function for file list comparisons | |
816 | to ensure that signed/unsigned usage is consistent between machines. */ | |
817 | int u_strcmp(const char *cs1, const char *cs2) | |
818 | { | |
5a788ade AT |
819 | const uchar *s1 = (const uchar *)cs1; |
820 | const uchar *s2 = (const uchar *)cs2; | |
aa9b77a5 AT |
821 | |
822 | while (*s1 && *s2 && (*s1 == *s2)) { | |
823 | s1++; s2++; | |
824 | } | |
825 | ||
826 | return (int)*s1 - (int)*s2; | |
827 | } | |
eb86d661 | 828 | |
43b06eea | 829 | static OFF_T last_ofs; |
eb86d661 | 830 | |
166aa723 | 831 | void end_progress(OFF_T size) |
eb86d661 AT |
832 | { |
833 | extern int do_progress, am_server; | |
834 | ||
835 | if (do_progress && !am_server) { | |
166aa723 | 836 | rprintf(FINFO,"%.0f (100%%)\n", (double)size); |
eb86d661 | 837 | } |
43b06eea | 838 | last_ofs = 0; |
eb86d661 AT |
839 | } |
840 | ||
841 | void show_progress(OFF_T ofs, OFF_T size) | |
842 | { | |
843 | extern int do_progress, am_server; | |
844 | ||
845 | if (do_progress && !am_server) { | |
43b06eea AT |
846 | if (ofs > last_ofs + 1000) { |
847 | int pct = (int)((100.0*ofs)/size); | |
eb86d661 | 848 | rprintf(FINFO,"%.0f (%d%%)\r", (double)ofs, pct); |
43b06eea | 849 | last_ofs = ofs; |
eb86d661 AT |
850 | } |
851 | } | |
852 | } | |
4b957c22 AT |
853 | |
854 | /* determine if a symlink points outside the current directory tree */ | |
855 | int unsafe_symlink(char *dest, char *src) | |
856 | { | |
857 | char *tok; | |
858 | int depth = 0; | |
859 | ||
860 | /* all absolute and null symlinks are unsafe */ | |
861 | if (!dest || !(*dest) || (*dest == '/')) return 1; | |
862 | ||
863 | src = strdup(src); | |
864 | if (!src) out_of_memory("unsafe_symlink"); | |
865 | ||
866 | /* find out what our safety margin is */ | |
867 | for (tok=strtok(src,"/"); tok; tok=strtok(NULL,"/")) { | |
868 | if (strcmp(tok,"..") == 0) { | |
869 | depth=0; | |
870 | } else if (strcmp(tok,".") == 0) { | |
871 | /* nothing */ | |
872 | } else { | |
873 | depth++; | |
874 | } | |
875 | } | |
876 | free(src); | |
877 | ||
878 | /* drop by one to account for the filename portion */ | |
879 | depth--; | |
880 | ||
881 | dest = strdup(dest); | |
882 | if (!dest) out_of_memory("unsafe_symlink"); | |
883 | ||
884 | for (tok=strtok(dest,"/"); tok; tok=strtok(NULL,"/")) { | |
885 | if (strcmp(tok,"..") == 0) { | |
886 | depth--; | |
887 | } else if (strcmp(tok,".") == 0) { | |
888 | /* nothing */ | |
889 | } else { | |
890 | depth++; | |
891 | } | |
892 | /* if at any point we go outside the current directory then | |
893 | stop - it is unsafe */ | |
894 | if (depth < 0) break; | |
895 | } | |
896 | ||
897 | free(dest); | |
898 | return (depth < 0); | |
899 | } | |
375a4556 | 900 | |
f7632fc6 AT |
901 | |
902 | /**************************************************************************** | |
903 | return the date and time as a string | |
904 | ****************************************************************************/ | |
905 | char *timestring(time_t t) | |
906 | { | |
907 | static char TimeBuf[200]; | |
908 | struct tm *tm = localtime(&t); | |
909 | ||
910 | #ifdef HAVE_STRFTIME | |
911 | strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %T",tm); | |
912 | #else | |
37f9805d | 913 | strlcpy(TimeBuf, asctime(tm), sizeof(TimeBuf)); |
f7632fc6 AT |
914 | #endif |
915 | ||
916 | if (TimeBuf[strlen(TimeBuf)-1] == '\n') { | |
917 | TimeBuf[strlen(TimeBuf)-1] = 0; | |
918 | } | |
919 | ||
920 | return(TimeBuf); | |
921 | } | |
922 | ||
d79d1c69 AT |
923 | |
924 | /**************************************************************************** | |
925 | like waitpid but does the WEXITSTATUS | |
926 | ****************************************************************************/ | |
dcc875e4 DD |
927 | #ifndef WEXITSTATUS |
928 | #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF)) | |
929 | #endif | |
d79d1c69 AT |
930 | void wait_process(pid_t pid, int *status) |
931 | { | |
932 | waitpid(pid, status, 0); | |
933 | *status = WEXITSTATUS(*status); | |
934 | } |