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 | ||
a5343e76 AT |
29 | /**************************************************************************** |
30 | Set a fd into nonblocking mode. Uses POSIX O_NONBLOCK if available, | |
31 | else | |
32 | if SYSV use O_NDELAY | |
33 | if BSD use FNDELAY | |
34 | ****************************************************************************/ | |
35 | int set_nonblocking(int fd) | |
94481d91 | 36 | { |
a5343e76 AT |
37 | int val; |
38 | #ifdef O_NONBLOCK | |
39 | #define FLAG_TO_SET O_NONBLOCK | |
40 | #else | |
41 | #ifdef SYSV | |
42 | #define FLAG_TO_SET O_NDELAY | |
43 | #else /* BSD */ | |
44 | #define FLAG_TO_SET FNDELAY | |
45 | #endif | |
46 | #endif | |
47 | ||
48 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
49 | return -1; | |
50 | val |= FLAG_TO_SET; | |
51 | return fcntl( fd, F_SETFL, val); | |
52 | #undef FLAG_TO_SET | |
94481d91 AT |
53 | } |
54 | ||
d9bea2dd | 55 | |
c627d613 AT |
56 | /* this is taken from CVS */ |
57 | int piped_child(char **command,int *f_in,int *f_out) | |
58 | { | |
59 | int pid; | |
60 | int to_child_pipe[2]; | |
61 | int from_child_pipe[2]; | |
62 | ||
63 | if (pipe(to_child_pipe) < 0 || | |
64 | pipe(from_child_pipe) < 0) { | |
9486289c | 65 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 66 | exit_cleanup(RERR_IPC); |
c627d613 AT |
67 | } |
68 | ||
69 | ||
3ba62a83 | 70 | pid = do_fork(); |
c627d613 | 71 | if (pid < 0) { |
9486289c | 72 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 73 | exit_cleanup(RERR_IPC); |
c627d613 AT |
74 | } |
75 | ||
76 | if (pid == 0) | |
77 | { | |
6574b4f7 | 78 | extern int orig_umask; |
c627d613 AT |
79 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || |
80 | close(to_child_pipe[1]) < 0 || | |
81 | close(from_child_pipe[0]) < 0 || | |
82 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 83 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 84 | exit_cleanup(RERR_IPC); |
c627d613 | 85 | } |
773f2bd4 AT |
86 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); |
87 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
6574b4f7 | 88 | umask(orig_umask); |
c627d613 | 89 | execvp(command[0], command); |
9486289c | 90 | rprintf(FERROR,"Failed to exec %s : %s\n", |
c627d613 | 91 | command[0],strerror(errno)); |
65417579 | 92 | exit_cleanup(RERR_IPC); |
c627d613 AT |
93 | } |
94 | ||
95 | if (close(from_child_pipe[1]) < 0 || | |
96 | close(to_child_pipe[0]) < 0) { | |
9486289c | 97 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 98 | exit_cleanup(RERR_IPC); |
c627d613 AT |
99 | } |
100 | ||
101 | *f_in = from_child_pipe[0]; | |
102 | *f_out = to_child_pipe[1]; | |
3eb38818 AT |
103 | |
104 | set_nonblocking(*f_in); | |
105 | set_nonblocking(*f_out); | |
c627d613 AT |
106 | |
107 | return pid; | |
108 | } | |
109 | ||
366345fe AT |
110 | int local_child(int argc, char **argv,int *f_in,int *f_out) |
111 | { | |
112 | int pid; | |
113 | int to_child_pipe[2]; | |
114 | int from_child_pipe[2]; | |
115 | ||
116 | if (pipe(to_child_pipe) < 0 || | |
117 | pipe(from_child_pipe) < 0) { | |
9486289c | 118 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 119 | exit_cleanup(RERR_IPC); |
366345fe AT |
120 | } |
121 | ||
122 | ||
123 | pid = do_fork(); | |
124 | if (pid < 0) { | |
9486289c | 125 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 126 | exit_cleanup(RERR_IPC); |
366345fe AT |
127 | } |
128 | ||
129 | if (pid == 0) { | |
130 | extern int am_sender; | |
131 | extern int am_server; | |
132 | ||
133 | am_sender = !am_sender; | |
134 | am_server = 1; | |
135 | ||
136 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
137 | close(to_child_pipe[1]) < 0 || | |
138 | close(from_child_pipe[0]) < 0 || | |
139 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 140 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 141 | exit_cleanup(RERR_IPC); |
366345fe AT |
142 | } |
143 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); | |
144 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
9486289c | 145 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
366345fe AT |
146 | } |
147 | ||
148 | if (close(from_child_pipe[1]) < 0 || | |
149 | close(to_child_pipe[0]) < 0) { | |
9486289c | 150 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 151 | exit_cleanup(RERR_IPC); |
366345fe AT |
152 | } |
153 | ||
154 | *f_in = from_child_pipe[0]; | |
155 | *f_out = to_child_pipe[1]; | |
156 | ||
157 | return pid; | |
158 | } | |
159 | ||
160 | ||
c627d613 AT |
161 | |
162 | void out_of_memory(char *str) | |
163 | { | |
9486289c | 164 | rprintf(FERROR,"ERROR: out of memory in %s\n",str); |
65417579 | 165 | exit_cleanup(RERR_MALLOC); |
575f2fca AT |
166 | } |
167 | ||
168 | void overflow(char *str) | |
169 | { | |
9486289c | 170 | rprintf(FERROR,"ERROR: buffer overflow in %s\n",str); |
65417579 | 171 | exit_cleanup(RERR_MALLOC); |
c627d613 AT |
172 | } |
173 | ||
174 | ||
c627d613 AT |
175 | |
176 | int set_modtime(char *fname,time_t modtime) | |
177 | { | |
31e12522 AT |
178 | extern int dry_run; |
179 | if (dry_run) return 0; | |
180 | { | |
1e9f155a | 181 | #ifdef HAVE_UTIMBUF |
31e12522 AT |
182 | struct utimbuf tbuf; |
183 | tbuf.actime = time(NULL); | |
184 | tbuf.modtime = modtime; | |
185 | return utime(fname,&tbuf); | |
c627d613 | 186 | #elif defined(HAVE_UTIME) |
31e12522 AT |
187 | time_t t[2]; |
188 | t[0] = time(NULL); | |
189 | t[1] = modtime; | |
190 | return utime(fname,t); | |
c627d613 | 191 | #else |
31e12522 AT |
192 | struct timeval t[2]; |
193 | t[0].tv_sec = time(NULL); | |
194 | t[0].tv_usec = 0; | |
195 | t[1].tv_sec = modtime; | |
196 | t[1].tv_usec = 0; | |
197 | return utimes(fname,t); | |
c627d613 | 198 | #endif |
31e12522 | 199 | } |
c627d613 | 200 | } |
94481d91 | 201 | |
720b47f2 | 202 | |
6574b4f7 AT |
203 | /**************************************************************************** |
204 | create any necessary directories in fname. Unfortunately we don't know | |
205 | what perms to give the directory when this is called so we need to rely | |
206 | on the umask | |
207 | ****************************************************************************/ | |
208 | int create_directory_path(char *fname) | |
209 | { | |
210 | extern int orig_umask; | |
211 | char *p; | |
212 | ||
213 | while (*fname == '/') fname++; | |
214 | while (strncmp(fname,"./",2)==0) fname += 2; | |
215 | ||
216 | p = fname; | |
217 | while ((p=strchr(p,'/'))) { | |
218 | *p = 0; | |
1b2d733a | 219 | do_mkdir(fname,0777 & ~orig_umask); |
6574b4f7 AT |
220 | *p = '/'; |
221 | p++; | |
222 | } | |
223 | return 0; | |
224 | } | |
950ab32d AT |
225 | |
226 | ||
227 | /* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted. | |
228 | Return LEN upon success, write's (negative) error code otherwise. | |
229 | ||
230 | derived from GNU C's cccp.c. | |
231 | */ | |
a5343e76 | 232 | static int full_write(int desc, char *ptr, int len) |
950ab32d AT |
233 | { |
234 | int total_written; | |
235 | ||
236 | total_written = 0; | |
237 | while (len > 0) { | |
238 | int written = write (desc, ptr, len); | |
239 | if (written < 0) { | |
240 | #ifdef EINTR | |
241 | if (errno == EINTR) | |
242 | continue; | |
243 | #endif | |
244 | return written; | |
245 | } | |
246 | total_written += written; | |
247 | ptr += written; | |
248 | len -= written; | |
249 | } | |
250 | return total_written; | |
251 | } | |
252 | ||
253 | /* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted. | |
254 | Return the actual number of bytes read, zero for EOF, or negative | |
255 | for an error. | |
256 | ||
257 | derived from GNU C's cccp.c. */ | |
6e4fb64e | 258 | static int safe_read(int desc, char *ptr, int len) |
950ab32d AT |
259 | { |
260 | int n_chars; | |
261 | ||
262 | if (len <= 0) | |
263 | return len; | |
264 | ||
265 | #ifdef EINTR | |
266 | do { | |
267 | n_chars = read(desc, ptr, len); | |
268 | } while (n_chars < 0 && errno == EINTR); | |
269 | #else | |
270 | n_chars = read(desc, ptr, len); | |
271 | #endif | |
272 | ||
273 | return n_chars; | |
274 | } | |
275 | ||
276 | ||
277 | /* copy a file - this is used in conjunction with the --temp-dir option */ | |
278 | int copy_file(char *source, char *dest, mode_t mode) | |
279 | { | |
280 | int ifd; | |
281 | int ofd; | |
282 | char buf[1024 * 8]; | |
283 | int len; /* Number of bytes read into `buf'. */ | |
284 | ||
285 | ifd = open(source, O_RDONLY); | |
286 | if (ifd == -1) { | |
9486289c | 287 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
288 | source,strerror(errno)); |
289 | return -1; | |
290 | } | |
291 | ||
c7c11a0d | 292 | if (robust_unlink(dest) && errno != ENOENT) { |
9486289c | 293 | rprintf(FERROR,"unlink %s: %s\n", |
950ab32d AT |
294 | dest,strerror(errno)); |
295 | return -1; | |
296 | } | |
297 | ||
31e12522 | 298 | ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode); |
c46ded46 | 299 | if (ofd == -1) { |
9486289c | 300 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
301 | dest,strerror(errno)); |
302 | close(ifd); | |
303 | return -1; | |
304 | } | |
305 | ||
306 | while ((len = safe_read(ifd, buf, sizeof(buf))) > 0) { | |
307 | if (full_write(ofd, buf, len) < 0) { | |
9486289c | 308 | rprintf(FERROR,"write %s: %s\n", |
950ab32d AT |
309 | dest,strerror(errno)); |
310 | close(ifd); | |
311 | close(ofd); | |
312 | return -1; | |
313 | } | |
314 | } | |
315 | ||
316 | close(ifd); | |
317 | close(ofd); | |
318 | ||
319 | if (len < 0) { | |
9486289c | 320 | rprintf(FERROR,"read %s: %s\n", |
950ab32d AT |
321 | source,strerror(errno)); |
322 | return -1; | |
323 | } | |
324 | ||
325 | return 0; | |
326 | } | |
feaa89c4 | 327 | |
c7c11a0d DD |
328 | /* |
329 | Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so | |
330 | rename to <path>/.rsyncNNN instead. Note that successive rsync runs | |
331 | will shuffle the filenames around a bit as long as the file is still | |
332 | busy; this is because this function does not know if the unlink call | |
333 | is due to a new file coming in, or --delete trying to remove old | |
334 | .rsyncNNN files, hence it renames it each time. | |
335 | */ | |
336 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ | |
337 | #define MAX_RENAMES_DIGITS 3 | |
338 | #define MAX_RENAMES 1000 | |
339 | ||
340 | int robust_unlink(char *fname) | |
341 | { | |
342 | #ifndef ETXTBSY | |
343 | return do_unlink(fname); | |
344 | #else | |
345 | static int counter = 1; | |
346 | int rc, pos, start; | |
347 | char path[MAXPATHLEN]; | |
348 | ||
349 | rc = do_unlink(fname); | |
350 | if ((rc == 0) || (errno != ETXTBSY)) | |
351 | return rc; | |
352 | ||
353 | strlcpy(path, fname, MAXPATHLEN); | |
354 | ||
355 | pos = strlen(path); | |
356 | while((path[--pos] != '/') && (pos >= 0)) | |
357 | ; | |
358 | ++pos; | |
359 | strlcpy(&path[pos], ".rsync", MAXPATHLEN-pos); | |
360 | pos += sizeof(".rsync")-1; | |
361 | ||
362 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
363 | errno = ETXTBSY; | |
364 | return -1; | |
365 | } | |
366 | ||
367 | /* start where the last one left off to reduce chance of clashes */ | |
368 | start = counter; | |
369 | do { | |
370 | sprintf(&path[pos], "%03d", counter); | |
371 | if (++counter >= MAX_RENAMES) | |
372 | counter = 1; | |
373 | } while (((rc = access(path, 0)) == 0) && (counter != start)); | |
374 | ||
375 | if (verbose > 0) | |
376 | rprintf(FINFO,"renaming %s to %s because of text busy\n", | |
377 | fname, path); | |
378 | ||
379 | /* maybe we should return rename()'s exit status? Nah. */ | |
380 | if (do_rename(fname, path) != 0) { | |
381 | errno = ETXTBSY; | |
382 | return -1; | |
383 | } | |
384 | return 0; | |
385 | #endif | |
386 | } | |
387 | ||
388 | int robust_rename(char *from, char *to) | |
389 | { | |
390 | #ifndef ETXTBSY | |
391 | return do_rename(from, to); | |
392 | #else | |
393 | int rc = do_rename(from, to); | |
394 | if ((rc == 0) || (errno != ETXTBSY)) | |
395 | return rc; | |
396 | if (robust_unlink(to) != 0) | |
397 | return -1; | |
398 | return do_rename(from, to); | |
399 | #endif | |
400 | } | |
401 | ||
402 | ||
feaa89c4 AT |
403 | /* sleep for a while via select */ |
404 | void u_sleep(int usec) | |
405 | { | |
406 | struct timeval tv; | |
407 | ||
408 | tv.tv_sec = 0; | |
409 | tv.tv_usec = usec; | |
410 | select(0, NULL, NULL, NULL, &tv); | |
411 | } | |
3ba62a83 AT |
412 | |
413 | ||
414 | static pid_t all_pids[10]; | |
415 | static int num_pids; | |
416 | ||
417 | /* fork and record the pid of the child */ | |
418 | pid_t do_fork(void) | |
419 | { | |
420 | pid_t newpid = fork(); | |
421 | ||
422 | if (newpid) { | |
423 | all_pids[num_pids++] = newpid; | |
424 | } | |
425 | return newpid; | |
426 | } | |
427 | ||
428 | /* kill all children */ | |
429 | void kill_all(int sig) | |
430 | { | |
431 | int i; | |
432 | for (i=0;i<num_pids;i++) { | |
433 | if (all_pids[i] != getpid()) | |
434 | kill(all_pids[i], sig); | |
435 | } | |
436 | } | |
9486289c | 437 | |
8ef4ffd6 AT |
438 | /* turn a user name into a uid */ |
439 | int name_to_uid(char *name, uid_t *uid) | |
440 | { | |
441 | struct passwd *pass; | |
442 | if (!name || !*name) return 0; | |
443 | pass = getpwnam(name); | |
444 | if (pass) { | |
445 | *uid = pass->pw_uid; | |
446 | return 1; | |
447 | } | |
448 | return 0; | |
449 | } | |
450 | ||
451 | /* turn a group name into a gid */ | |
452 | int name_to_gid(char *name, gid_t *gid) | |
453 | { | |
454 | struct group *grp; | |
455 | if (!name || !*name) return 0; | |
456 | grp = getgrnam(name); | |
457 | if (grp) { | |
458 | *gid = grp->gr_gid; | |
459 | return 1; | |
460 | } | |
461 | return 0; | |
462 | } | |
463 | ||
ff8b29b8 | 464 | |
31593dd6 AT |
465 | /* lock a byte range in a open file */ |
466 | int lock_range(int fd, int offset, int len) | |
0c515f17 | 467 | { |
31593dd6 | 468 | struct flock lock; |
0c515f17 | 469 | |
31593dd6 AT |
470 | lock.l_type = F_WRLCK; |
471 | lock.l_whence = SEEK_SET; | |
472 | lock.l_start = offset; | |
473 | lock.l_len = len; | |
474 | lock.l_pid = 0; | |
475 | ||
476 | return fcntl(fd,F_SETLK,&lock) == 0; | |
0c515f17 | 477 | } |
874895d5 AT |
478 | |
479 | ||
b389939f | 480 | static void glob_expand_one(char *s, char **argv, int *argc, int maxargs, int sanitize_paths) |
874895d5 | 481 | { |
932be9aa | 482 | #if !(defined(HAVE_GLOB) && defined(HAVE_GLOB_H)) |
e42c9458 | 483 | if (!*s) s = "."; |
087bf010 | 484 | argv[*argc] = strdup(s); |
874895d5 AT |
485 | (*argc)++; |
486 | return; | |
487 | #else | |
488 | glob_t globbuf; | |
489 | int i; | |
490 | ||
e42c9458 AT |
491 | if (!*s) s = "."; |
492 | ||
44e2e578 DD |
493 | s = strdup(s); |
494 | sanitize_path(s); | |
495 | argv[*argc] = s; | |
087bf010 | 496 | |
874895d5 AT |
497 | memset(&globbuf, 0, sizeof(globbuf)); |
498 | glob(argv[*argc], 0, NULL, &globbuf); | |
499 | if (globbuf.gl_pathc == 0) { | |
500 | (*argc)++; | |
501 | globfree(&globbuf); | |
502 | return; | |
503 | } | |
504 | for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) { | |
505 | if (i == 0) free(argv[*argc]); | |
506 | argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]); | |
507 | if (!argv[(*argc) + i]) out_of_memory("glob_expand"); | |
508 | } | |
509 | globfree(&globbuf); | |
510 | (*argc) += i; | |
511 | #endif | |
512 | } | |
5a96ee05 | 513 | |
b389939f | 514 | void glob_expand(char *base1, char **argv, int *argc, int maxargs, int sanitize_paths) |
087bf010 AT |
515 | { |
516 | char *s = argv[*argc]; | |
517 | char *p, *q; | |
ba5e128d | 518 | char *base = base1; |
087bf010 AT |
519 | |
520 | if (!s || !*s) return; | |
521 | ||
e42c9458 AT |
522 | if (strncmp(s, base, strlen(base)) == 0) { |
523 | s += strlen(base); | |
524 | } | |
525 | ||
087bf010 AT |
526 | s = strdup(s); |
527 | if (!s) out_of_memory("glob_expand"); | |
528 | ||
ba5e128d AT |
529 | base = (char *)malloc(strlen(base1)+3); |
530 | if (!base) out_of_memory("glob_expand"); | |
531 | ||
532 | sprintf(base," %s/", base1); | |
533 | ||
087bf010 AT |
534 | q = s; |
535 | while ((p = strstr(q,base)) && ((*argc) < maxargs)) { | |
ba5e128d AT |
536 | /* split it at this point */ |
537 | *p = 0; | |
b389939f | 538 | glob_expand_one(q, argv, argc, maxargs, sanitize_paths); |
ba5e128d | 539 | q = p+strlen(base); |
087bf010 AT |
540 | } |
541 | ||
b389939f | 542 | if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs, sanitize_paths); |
087bf010 AT |
543 | |
544 | free(s); | |
ba5e128d | 545 | free(base); |
087bf010 | 546 | } |
5a96ee05 AT |
547 | |
548 | /******************************************************************* | |
549 | convert a string to lower case | |
550 | ********************************************************************/ | |
551 | void strlower(char *s) | |
552 | { | |
553 | while (*s) { | |
554 | if (isupper(*s)) *s = tolower(*s); | |
555 | s++; | |
556 | } | |
557 | } | |
e42c9458 | 558 | |
37f9805d AT |
559 | /* this is like vsnprintf but it always null terminates, so you |
560 | can fit at most n-1 chars in */ | |
e42c9458 AT |
561 | int vslprintf(char *str, int n, const char *format, va_list ap) |
562 | { | |
e42c9458 | 563 | int ret = vsnprintf(str, n, format, ap); |
37f9805d AT |
564 | if (ret >= n || ret < 0) { |
565 | str[n-1] = 0; | |
e42c9458 AT |
566 | return -1; |
567 | } | |
568 | str[ret] = 0; | |
569 | return ret; | |
e42c9458 AT |
570 | } |
571 | ||
572 | ||
573 | /* like snprintf but always null terminates */ | |
574 | int slprintf(char *str, int n, char *format, ...) | |
575 | { | |
576 | va_list ap; | |
577 | int ret; | |
578 | ||
579 | va_start(ap, format); | |
580 | ret = vslprintf(str,n,format,ap); | |
581 | va_end(ap); | |
582 | return ret; | |
583 | } | |
8d9dc9f9 | 584 | |
fe8c0a98 AT |
585 | |
586 | void *Realloc(void *p, int size) | |
587 | { | |
588 | if (!p) return (void *)malloc(size); | |
589 | return (void *)realloc(p, size); | |
590 | } | |
5243c216 AT |
591 | |
592 | ||
593 | void clean_fname(char *name) | |
594 | { | |
595 | char *p; | |
596 | int l; | |
597 | int modified = 1; | |
598 | ||
599 | if (!name) return; | |
600 | ||
601 | while (modified) { | |
602 | modified = 0; | |
603 | ||
604 | if ((p=strstr(name,"/./"))) { | |
605 | modified = 1; | |
606 | while (*p) { | |
607 | p[0] = p[2]; | |
608 | p++; | |
609 | } | |
610 | } | |
611 | ||
612 | if ((p=strstr(name,"//"))) { | |
613 | modified = 1; | |
614 | while (*p) { | |
615 | p[0] = p[1]; | |
616 | p++; | |
617 | } | |
618 | } | |
619 | ||
620 | if (strncmp(p=name,"./",2) == 0) { | |
621 | modified = 1; | |
622 | do { | |
623 | p[0] = p[2]; | |
624 | } while (*p++); | |
625 | } | |
626 | ||
627 | l = strlen(p=name); | |
628 | if (l > 1 && p[l-1] == '/') { | |
629 | modified = 1; | |
630 | p[l-1] = 0; | |
631 | } | |
632 | } | |
633 | } | |
634 | ||
1b8e662a DD |
635 | /* |
636 | * Make path appear as if a chroot had occurred: | |
1b8e662a DD |
637 | * 1. remove leading "/" (or replace with "." if at end) |
638 | * 2. remove leading ".." components | |
639 | * 3. delete any other "<dir>/.." (recursively) | |
b5f9e67d DD |
640 | * While we're at it, remove double slashes and "." components like |
641 | * clean_fname does(), but DON'T remove a trailing slash because that | |
642 | * is sometimes significant on command line arguments. | |
44e2e578 | 643 | * Can only shrink paths, so sanitizes in place. |
1b8e662a DD |
644 | * Contributed by Dave Dykstra <dwd@bell-labs.com> |
645 | */ | |
646 | ||
44e2e578 | 647 | void sanitize_path(char *p) |
1b8e662a | 648 | { |
44e2e578 | 649 | char *start, *sanp; |
1b8e662a | 650 | |
44e2e578 DD |
651 | start = p; |
652 | sanp = p; | |
b5f9e67d DD |
653 | while (*p == '/') { |
654 | /* remove leading slashes */ | |
655 | p++; | |
656 | } | |
1b8e662a | 657 | while (*p != '\0') { |
b5f9e67d | 658 | /* this loop iterates once per filename component in p. |
44e2e578 | 659 | * both p (and sanp if the original had a slash) should |
b5f9e67d DD |
660 | * always be left pointing after a slash |
661 | */ | |
662 | if ((*p == '.') && ((*(p+1) == '/') || (*(p+1) == '\0'))) { | |
663 | /* skip "." component */ | |
664 | while (*++p == '/') { | |
665 | /* skip following slashes */ | |
666 | ; | |
667 | } | |
668 | } else if ((*p == '.') && (*(p+1) == '.') && | |
1b8e662a | 669 | ((*(p+2) == '/') || (*(p+2) == '\0'))) { |
b5f9e67d | 670 | /* skip ".." component followed by slash or end */ |
1b8e662a | 671 | p += 2; |
b5f9e67d DD |
672 | if (*p == '/') |
673 | p++; | |
44e2e578 DD |
674 | if (sanp != start) { |
675 | /* back up sanp one level */ | |
676 | --sanp; /* now pointing at slash */ | |
677 | while ((sanp > start) && (*(sanp - 1) != '/')) { | |
b5f9e67d | 678 | /* skip back up to slash */ |
44e2e578 | 679 | sanp--; |
b5f9e67d | 680 | } |
1b8e662a DD |
681 | } |
682 | } else { | |
1b8e662a | 683 | while (1) { |
b5f9e67d | 684 | /* copy one component through next slash */ |
44e2e578 | 685 | *sanp++ = *p++; |
b5f9e67d DD |
686 | if ((*p == '\0') || (*(p-1) == '/')) { |
687 | while (*p == '/') { | |
688 | /* skip multiple slashes */ | |
689 | p++; | |
690 | } | |
1b8e662a | 691 | break; |
b5f9e67d | 692 | } |
1b8e662a DD |
693 | } |
694 | } | |
695 | } | |
44e2e578 | 696 | if (sanp == start) { |
b5f9e67d | 697 | /* ended up with nothing, so put in "." component */ |
44e2e578 | 698 | *sanp++ = '.'; |
b5f9e67d | 699 | } |
44e2e578 | 700 | *sanp = '\0'; |
1b8e662a DD |
701 | } |
702 | ||
5243c216 AT |
703 | |
704 | static char curr_dir[MAXPATHLEN]; | |
705 | ||
706 | /* like chdir() but can be reversed with pop_dir() if save is set. It | |
707 | is also much faster as it remembers where we have been */ | |
708 | char *push_dir(char *dir, int save) | |
709 | { | |
710 | char *ret = curr_dir; | |
711 | static int initialised; | |
712 | ||
713 | if (!initialised) { | |
714 | initialised = 1; | |
715 | getcwd(curr_dir, sizeof(curr_dir)-1); | |
716 | } | |
717 | ||
c226b7c2 DD |
718 | if (!dir) return NULL; /* this call was probably just to initialize */ |
719 | ||
5243c216 AT |
720 | if (chdir(dir)) return NULL; |
721 | ||
722 | if (save) { | |
723 | ret = strdup(curr_dir); | |
724 | } | |
725 | ||
726 | if (*dir == '/') { | |
37f9805d | 727 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 | 728 | } else { |
37f9805d AT |
729 | strlcat(curr_dir,"/", sizeof(curr_dir)); |
730 | strlcat(curr_dir,dir, sizeof(curr_dir)); | |
5243c216 AT |
731 | } |
732 | ||
733 | clean_fname(curr_dir); | |
734 | ||
735 | return ret; | |
736 | } | |
737 | ||
738 | /* reverse a push_dir call */ | |
739 | int pop_dir(char *dir) | |
740 | { | |
741 | int ret; | |
742 | ||
743 | ret = chdir(dir); | |
744 | if (ret) { | |
745 | free(dir); | |
746 | return ret; | |
747 | } | |
748 | ||
37f9805d | 749 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 AT |
750 | |
751 | free(dir); | |
752 | ||
753 | return 0; | |
754 | } | |
aa9b77a5 AT |
755 | |
756 | /* we need to supply our own strcmp function for file list comparisons | |
757 | to ensure that signed/unsigned usage is consistent between machines. */ | |
758 | int u_strcmp(const char *cs1, const char *cs2) | |
759 | { | |
5a788ade AT |
760 | const uchar *s1 = (const uchar *)cs1; |
761 | const uchar *s2 = (const uchar *)cs2; | |
aa9b77a5 AT |
762 | |
763 | while (*s1 && *s2 && (*s1 == *s2)) { | |
764 | s1++; s2++; | |
765 | } | |
766 | ||
767 | return (int)*s1 - (int)*s2; | |
768 | } | |
eb86d661 | 769 | |
43b06eea | 770 | static OFF_T last_ofs; |
eb86d661 AT |
771 | |
772 | void end_progress(void) | |
773 | { | |
774 | extern int do_progress, am_server; | |
775 | ||
776 | if (do_progress && !am_server) { | |
777 | rprintf(FINFO,"\n"); | |
778 | } | |
43b06eea | 779 | last_ofs = 0; |
eb86d661 AT |
780 | } |
781 | ||
782 | void show_progress(OFF_T ofs, OFF_T size) | |
783 | { | |
784 | extern int do_progress, am_server; | |
785 | ||
786 | if (do_progress && !am_server) { | |
43b06eea AT |
787 | if (ofs > last_ofs + 1000) { |
788 | int pct = (int)((100.0*ofs)/size); | |
eb86d661 | 789 | rprintf(FINFO,"%.0f (%d%%)\r", (double)ofs, pct); |
43b06eea | 790 | last_ofs = ofs; |
eb86d661 AT |
791 | } |
792 | } | |
793 | } | |
4b957c22 AT |
794 | |
795 | /* determine if a symlink points outside the current directory tree */ | |
796 | int unsafe_symlink(char *dest, char *src) | |
797 | { | |
798 | char *tok; | |
799 | int depth = 0; | |
800 | ||
801 | /* all absolute and null symlinks are unsafe */ | |
802 | if (!dest || !(*dest) || (*dest == '/')) return 1; | |
803 | ||
804 | src = strdup(src); | |
805 | if (!src) out_of_memory("unsafe_symlink"); | |
806 | ||
807 | /* find out what our safety margin is */ | |
808 | for (tok=strtok(src,"/"); tok; tok=strtok(NULL,"/")) { | |
809 | if (strcmp(tok,"..") == 0) { | |
810 | depth=0; | |
811 | } else if (strcmp(tok,".") == 0) { | |
812 | /* nothing */ | |
813 | } else { | |
814 | depth++; | |
815 | } | |
816 | } | |
817 | free(src); | |
818 | ||
819 | /* drop by one to account for the filename portion */ | |
820 | depth--; | |
821 | ||
822 | dest = strdup(dest); | |
823 | if (!dest) out_of_memory("unsafe_symlink"); | |
824 | ||
825 | for (tok=strtok(dest,"/"); tok; tok=strtok(NULL,"/")) { | |
826 | if (strcmp(tok,"..") == 0) { | |
827 | depth--; | |
828 | } else if (strcmp(tok,".") == 0) { | |
829 | /* nothing */ | |
830 | } else { | |
831 | depth++; | |
832 | } | |
833 | /* if at any point we go outside the current directory then | |
834 | stop - it is unsafe */ | |
835 | if (depth < 0) break; | |
836 | } | |
837 | ||
838 | free(dest); | |
839 | return (depth < 0); | |
840 | } | |
375a4556 | 841 | |
f7632fc6 AT |
842 | |
843 | /**************************************************************************** | |
844 | return the date and time as a string | |
845 | ****************************************************************************/ | |
846 | char *timestring(time_t t) | |
847 | { | |
848 | static char TimeBuf[200]; | |
849 | struct tm *tm = localtime(&t); | |
850 | ||
851 | #ifdef HAVE_STRFTIME | |
852 | strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %T",tm); | |
853 | #else | |
37f9805d | 854 | strlcpy(TimeBuf, asctime(tm), sizeof(TimeBuf)); |
f7632fc6 AT |
855 | #endif |
856 | ||
857 | if (TimeBuf[strlen(TimeBuf)-1] == '\n') { | |
858 | TimeBuf[strlen(TimeBuf)-1] = 0; | |
859 | } | |
860 | ||
861 | return(TimeBuf); | |
862 | } | |
863 |