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