Commit | Line | Data |
---|---|---|
0f78b815 WD |
1 | /* |
2 | * Utility routines used in rsync. | |
5cb37436 | 3 | * |
0f78b815 WD |
4 | * Copyright (C) 1996-2000 Andrew Tridgell |
5 | * Copyright (C) 1996 Paul Mackerras | |
6 | * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> | |
b3bf9b9d | 7 | * Copyright (C) 2003-2009 Wayne Davison |
5cb37436 | 8 | * |
0ecfbf27 | 9 | * This program is free software; you can redistribute it and/or modify |
8e41b68e WD |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 3 of the License, or | |
12 | * (at your option) any later version. | |
5cb37436 | 13 | * |
0ecfbf27 MP |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
5cb37436 | 18 | * |
e7c67065 | 19 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 20 | * with this program; if not, visit the http://fsf.org website. |
0ecfbf27 | 21 | */ |
c627d613 | 22 | |
c627d613 | 23 | #include "rsync.h" |
1b42f628 | 24 | #include "ifuncs.h" |
5dd14f0c WD |
25 | #include "itypes.h" |
26 | #include "inums.h" | |
c627d613 | 27 | |
bc6ebcd2 WD |
28 | extern int dry_run; |
29 | extern int module_id; | |
30 | extern int modify_window; | |
7e43da81 | 31 | extern int relative_paths; |
e9489cd6 | 32 | extern int preserve_xattrs; |
7c73536c | 33 | extern char *module_dir; |
a8167c66 | 34 | extern unsigned int module_dirlen; |
a7260c40 | 35 | extern char *partial_dir; |
7b6c5c77 | 36 | extern filter_rule_list daemon_filter_list; |
c7c11a0d | 37 | |
0ecfbf27 MP |
38 | int sanitize_paths = 0; |
39 | ||
a8167c66 WD |
40 | char curr_dir[MAXPATHLEN]; |
41 | unsigned int curr_dir_len; | |
42 | int curr_dir_depth; /* This is only set for a sanitizing daemon. */ | |
43 | ||
0f78b815 | 44 | /* Set a fd into nonblocking mode. */ |
f0359dd0 AT |
45 | void set_nonblocking(int fd) |
46 | { | |
47 | int val; | |
48 | ||
ff530f04 | 49 | if ((val = fcntl(fd, F_GETFL)) == -1) |
f0359dd0 AT |
50 | return; |
51 | if (!(val & NONBLOCK_FLAG)) { | |
52 | val |= NONBLOCK_FLAG; | |
53 | fcntl(fd, F_SETFL, val); | |
54 | } | |
55 | } | |
56 | ||
0f78b815 | 57 | /* Set a fd into blocking mode. */ |
36349ea0 AT |
58 | void set_blocking(int fd) |
59 | { | |
60 | int val; | |
61 | ||
ff530f04 | 62 | if ((val = fcntl(fd, F_GETFL)) == -1) |
36349ea0 AT |
63 | return; |
64 | if (val & NONBLOCK_FLAG) { | |
65 | val &= ~NONBLOCK_FLAG; | |
66 | fcntl(fd, F_SETFL, val); | |
67 | } | |
68 | } | |
69 | ||
ac13ad10 | 70 | /** |
0ecfbf27 MP |
71 | * Create a file descriptor pair - like pipe() but use socketpair if |
72 | * possible (because of blocking issues on pipes). | |
5cb37436 | 73 | * |
0ecfbf27 | 74 | * Always set non-blocking. |
f0359dd0 | 75 | */ |
08f15335 AT |
76 | int fd_pair(int fd[2]) |
77 | { | |
f0359dd0 AT |
78 | int ret; |
79 | ||
4f5b0756 | 80 | #ifdef HAVE_SOCKETPAIR |
f0359dd0 | 81 | ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd); |
08f15335 | 82 | #else |
f0359dd0 | 83 | ret = pipe(fd); |
08f15335 | 84 | #endif |
f0359dd0 AT |
85 | |
86 | if (ret == 0) { | |
87 | set_nonblocking(fd[0]); | |
88 | set_nonblocking(fd[1]); | |
89 | } | |
0ecfbf27 | 90 | |
f0359dd0 | 91 | return ret; |
08f15335 AT |
92 | } |
93 | ||
0b515981 | 94 | void print_child_argv(const char *prefix, char **cmd) |
5ad0e46f | 95 | { |
0b515981 | 96 | rprintf(FCLIENT, "%s ", prefix); |
5ad0e46f MP |
97 | for (; *cmd; cmd++) { |
98 | /* Look for characters that ought to be quoted. This | |
99 | * is not a great quoting algorithm, but it's | |
100 | * sufficient for a log message. */ | |
101 | if (strspn(*cmd, "abcdefghijklmnopqrstuvwxyz" | |
102 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
103 | "0123456789" | |
104 | ",.-_=+@/") != strlen(*cmd)) { | |
a3f6dbdf | 105 | rprintf(FCLIENT, "\"%s\" ", *cmd); |
5ad0e46f | 106 | } else { |
a3f6dbdf | 107 | rprintf(FCLIENT, "%s ", *cmd); |
5ad0e46f MP |
108 | } |
109 | } | |
a3f6dbdf | 110 | rprintf(FCLIENT, "\n"); |
5ad0e46f MP |
111 | } |
112 | ||
4a19c3b2 | 113 | NORETURN void out_of_memory(const char *str) |
c627d613 | 114 | { |
2cd421d8 | 115 | rprintf(FERROR, "ERROR: out of memory in %s [%s]\n", str, who_am_i()); |
c284f34a | 116 | exit_cleanup(RERR_MALLOC); |
575f2fca AT |
117 | } |
118 | ||
4a19c3b2 | 119 | NORETURN void overflow_exit(const char *str) |
575f2fca | 120 | { |
2cd421d8 | 121 | rprintf(FERROR, "ERROR: buffer overflow in %s [%s]\n", str, who_am_i()); |
c284f34a | 122 | exit_cleanup(RERR_MALLOC); |
c627d613 AT |
123 | } |
124 | ||
1a2e41af | 125 | int set_modtime(const char *fname, time_t modtime, uint32 mod_nsec, mode_t mode) |
c627d613 | 126 | { |
accc091f | 127 | #ifndef CAN_SET_SYMLINK_TIMES |
25007999 WD |
128 | if (S_ISLNK(mode)) |
129 | return 1; | |
130 | #endif | |
131 | ||
951e826b | 132 | if (DEBUG_GTE(TIME, 1)) { |
404e813c | 133 | rprintf(FINFO, "set modtime of %s to (%ld) %s", |
785abd48 | 134 | fname, (long)modtime, |
404e813c MP |
135 | asctime(localtime(&modtime))); |
136 | } | |
5cb37436 | 137 | |
15778afb WD |
138 | if (dry_run) |
139 | return 0; | |
140 | ||
31e12522 | 141 | { |
1a2e41af WD |
142 | #ifdef HAVE_UTIMENSAT |
143 | struct timespec t[2]; | |
144 | t[0].tv_sec = 0; | |
145 | t[0].tv_nsec = UTIME_NOW; | |
146 | t[1].tv_sec = modtime; | |
147 | t[1].tv_nsec = mod_nsec; | |
148 | if (utimensat(AT_FDCWD, fname, t, AT_SYMLINK_NOFOLLOW) < 0) | |
149 | return S_ISLNK(mode) && errno == ENOSYS ? 1 : -1; | |
150 | return 0; | |
151 | #elif defined HAVE_UTIMES || defined HAVE_LUTIMES | |
25007999 WD |
152 | struct timeval t[2]; |
153 | t[0].tv_sec = time(NULL); | |
154 | t[0].tv_usec = 0; | |
155 | t[1].tv_sec = modtime; | |
1a2e41af | 156 | t[1].tv_usec = mod_nsec / 1000; |
25007999 | 157 | # ifdef HAVE_LUTIMES |
accc091f WD |
158 | if (lutimes(fname, t) < 0) |
159 | return S_ISLNK(mode) && errno == ENOSYS ? 1 : -1; | |
160 | return 0; | |
161 | # else | |
25007999 | 162 | return utimes(fname, t); |
accc091f | 163 | # endif |
4f9b139a | 164 | #elif defined HAVE_STRUCT_UTIMBUF |
5cb37436 | 165 | struct utimbuf tbuf; |
31e12522 AT |
166 | tbuf.actime = time(NULL); |
167 | tbuf.modtime = modtime; | |
168 | return utime(fname,&tbuf); | |
4f5b0756 | 169 | #elif defined HAVE_UTIME |
31e12522 AT |
170 | time_t t[2]; |
171 | t[0] = time(NULL); | |
172 | t[1] = modtime; | |
173 | return utime(fname,t); | |
c627d613 | 174 | #else |
25007999 | 175 | #error No file-time-modification routine found! |
c627d613 | 176 | #endif |
31e12522 | 177 | } |
c627d613 | 178 | } |
94481d91 | 179 | |
85c41757 | 180 | /* Create any necessary directories in fname. Any missing directories are |
3696674b WD |
181 | * created with default permissions. Returns < 0 on error, or the number |
182 | * of directories created. */ | |
183 | int make_path(char *fname, int flags) | |
6574b4f7 | 184 | { |
3696674b | 185 | char *end, *p; |
85c41757 | 186 | int ret = 0; |
6574b4f7 | 187 | |
3696674b WD |
188 | if (flags & MKP_SKIP_SLASH) { |
189 | while (*fname == '/') | |
190 | fname++; | |
191 | } | |
192 | ||
193 | while (*fname == '.' && fname[1] == '/') | |
c284f34a | 194 | fname += 2; |
6574b4f7 | 195 | |
3696674b WD |
196 | if (flags & MKP_DROP_NAME) { |
197 | end = strrchr(fname, '/'); | |
198 | if (!end) | |
199 | return 0; | |
200 | *end = '\0'; | |
201 | } else | |
202 | end = fname + strlen(fname); | |
203 | ||
3696674b WD |
204 | /* Try to find an existing dir, starting from the deepest dir. */ |
205 | for (p = end; ; ) { | |
206 | if (do_mkdir(fname, ACCESSPERMS) == 0) { | |
207 | ret++; | |
208 | break; | |
209 | } | |
210 | if (errno != ENOENT) { | |
211 | if (errno != EEXIST) | |
212 | ret = -ret - 1; | |
213 | break; | |
214 | } | |
215 | while (1) { | |
216 | if (p == fname) { | |
217 | ret = -ret - 1; | |
218 | goto double_break; | |
219 | } | |
220 | if (*--p == '/') { | |
221 | if (p == fname) { | |
222 | ret = -ret - 1; /* impossible... */ | |
223 | goto double_break; | |
224 | } | |
225 | *p = '\0'; | |
226 | break; | |
227 | } | |
228 | } | |
229 | } | |
230 | double_break: | |
231 | ||
232 | /* Make all the dirs that we didn't find on the way here. */ | |
233 | while (p != end) { | |
234 | *p = '/'; | |
235 | p += strlen(p); | |
236 | if (ret < 0) /* Skip mkdir on error, but keep restoring the path. */ | |
237 | continue; | |
238 | if (do_mkdir(fname, ACCESSPERMS) < 0) | |
239 | ret = -ret - 1; | |
240 | else | |
241 | ret++; | |
6574b4f7 | 242 | } |
3696674b | 243 | |
3696674b WD |
244 | if (flags & MKP_DROP_NAME) |
245 | *end = '/'; | |
246 | ||
85c41757 | 247 | return ret; |
6574b4f7 | 248 | } |
950ab32d | 249 | |
ac13ad10 MP |
250 | /** |
251 | * Write @p len bytes at @p ptr to descriptor @p desc, retrying if | |
252 | * interrupted. | |
253 | * | |
254 | * @retval len upon success | |
255 | * | |
256 | * @retval <0 write's (negative) error code | |
257 | * | |
258 | * Derived from GNU C's cccp.c. | |
259 | */ | |
4a19c3b2 | 260 | int full_write(int desc, const char *ptr, size_t len) |
950ab32d AT |
261 | { |
262 | int total_written; | |
5cb37436 | 263 | |
950ab32d AT |
264 | total_written = 0; |
265 | while (len > 0) { | |
5c1b7bfd | 266 | int written = write(desc, ptr, len); |
950ab32d | 267 | if (written < 0) { |
950ab32d AT |
268 | if (errno == EINTR) |
269 | continue; | |
950ab32d AT |
270 | return written; |
271 | } | |
272 | total_written += written; | |
273 | ptr += written; | |
274 | len -= written; | |
275 | } | |
276 | return total_written; | |
277 | } | |
278 | ||
ac13ad10 MP |
279 | /** |
280 | * Read @p len bytes at @p ptr from descriptor @p desc, retrying if | |
281 | * interrupted. | |
282 | * | |
283 | * @retval >0 the actual number of bytes read | |
284 | * | |
285 | * @retval 0 for EOF | |
286 | * | |
287 | * @retval <0 for an error. | |
288 | * | |
289 | * Derived from GNU C's cccp.c. */ | |
9dd891bb | 290 | static int safe_read(int desc, char *ptr, size_t len) |
950ab32d AT |
291 | { |
292 | int n_chars; | |
5cb37436 | 293 | |
9dd891bb | 294 | if (len == 0) |
950ab32d | 295 | return len; |
5cb37436 | 296 | |
950ab32d AT |
297 | do { |
298 | n_chars = read(desc, ptr, len); | |
299 | } while (n_chars < 0 && errno == EINTR); | |
5cb37436 | 300 | |
950ab32d AT |
301 | return n_chars; |
302 | } | |
303 | ||
2cce7545 WD |
304 | /* Copy a file. If ofd < 0, copy_file unlinks and opens the "dest" file. |
305 | * Otherwise, it just writes to and closes the provided file descriptor. | |
e9489cd6 WD |
306 | * In either case, if --xattrs are being preserved, the dest file will |
307 | * have its xattrs set from the source file. | |
ac13ad10 | 308 | * |
3e13004b WD |
309 | * This is used in conjunction with the --temp-dir, --backup, and |
310 | * --copy-dest options. */ | |
3696674b | 311 | int copy_file(const char *source, const char *dest, int ofd, mode_t mode) |
950ab32d AT |
312 | { |
313 | int ifd; | |
950ab32d AT |
314 | char buf[1024 * 8]; |
315 | int len; /* Number of bytes read into `buf'. */ | |
316 | ||
f5b532b1 | 317 | if ((ifd = do_open(source, O_RDONLY, 0)) < 0) { |
f1ca7c44 | 318 | int save_errno = errno; |
3f0211b6 | 319 | rsyserr(FERROR_XFER, errno, "open %s", full_fname(source)); |
f1ca7c44 | 320 | errno = save_errno; |
950ab32d AT |
321 | return -1; |
322 | } | |
323 | ||
2cce7545 WD |
324 | if (ofd < 0) { |
325 | if (robust_unlink(dest) && errno != ENOENT) { | |
f1ca7c44 | 326 | int save_errno = errno; |
3f0211b6 | 327 | rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest)); |
f1ca7c44 | 328 | errno = save_errno; |
2cce7545 WD |
329 | return -1; |
330 | } | |
950ab32d | 331 | |
f1ca7c44 | 332 | if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) { |
3696674b WD |
333 | int save_errno = errno; |
334 | rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest)); | |
335 | close(ifd); | |
336 | errno = save_errno; | |
337 | return -1; | |
2cce7545 | 338 | } |
950ab32d AT |
339 | } |
340 | ||
5cb37436 | 341 | while ((len = safe_read(ifd, buf, sizeof buf)) > 0) { |
950ab32d | 342 | if (full_write(ofd, buf, len) < 0) { |
f1ca7c44 | 343 | int save_errno = errno; |
3f0211b6 | 344 | rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest)); |
950ab32d AT |
345 | close(ifd); |
346 | close(ofd); | |
f1ca7c44 | 347 | errno = save_errno; |
950ab32d AT |
348 | return -1; |
349 | } | |
350 | } | |
351 | ||
8b602edd | 352 | if (len < 0) { |
f1ca7c44 | 353 | int save_errno = errno; |
3f0211b6 | 354 | rsyserr(FERROR_XFER, errno, "read %s", full_fname(source)); |
8b602edd WD |
355 | close(ifd); |
356 | close(ofd); | |
f1ca7c44 | 357 | errno = save_errno; |
8b602edd WD |
358 | return -1; |
359 | } | |
360 | ||
9f27cd8c | 361 | if (close(ifd) < 0) { |
3f0211b6 | 362 | rsyserr(FWARNING, errno, "close failed on %s", |
d62bcc17 | 363 | full_fname(source)); |
9f27cd8c WD |
364 | } |
365 | ||
366 | if (close(ofd) < 0) { | |
f1ca7c44 | 367 | int save_errno = errno; |
3f0211b6 | 368 | rsyserr(FERROR_XFER, errno, "close failed on %s", |
d62bcc17 | 369 | full_fname(dest)); |
f1ca7c44 | 370 | errno = save_errno; |
9f27cd8c WD |
371 | return -1; |
372 | } | |
950ab32d | 373 | |
e9489cd6 WD |
374 | #ifdef SUPPORT_XATTRS |
375 | if (preserve_xattrs) | |
376 | copy_xattrs(source, dest); | |
377 | #endif | |
378 | ||
950ab32d AT |
379 | return 0; |
380 | } | |
feaa89c4 | 381 | |
c7c11a0d DD |
382 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ |
383 | #define MAX_RENAMES_DIGITS 3 | |
384 | #define MAX_RENAMES 1000 | |
385 | ||
ac13ad10 | 386 | /** |
b4235b31 MP |
387 | * Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so |
388 | * rename to <path>/.rsyncNNN instead. | |
389 | * | |
390 | * Note that successive rsync runs will shuffle the filenames around a | |
391 | * bit as long as the file is still busy; this is because this function | |
392 | * does not know if the unlink call is due to a new file coming in, or | |
393 | * --delete trying to remove old .rsyncNNN files, hence it renames it | |
394 | * each time. | |
395 | **/ | |
63cf5ae7 | 396 | int robust_unlink(const char *fname) |
c7c11a0d DD |
397 | { |
398 | #ifndef ETXTBSY | |
399 | return do_unlink(fname); | |
400 | #else | |
401 | static int counter = 1; | |
402 | int rc, pos, start; | |
403 | char path[MAXPATHLEN]; | |
404 | ||
405 | rc = do_unlink(fname); | |
c284f34a | 406 | if (rc == 0 || errno != ETXTBSY) |
c7c11a0d DD |
407 | return rc; |
408 | ||
c284f34a WD |
409 | if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN) |
410 | pos = MAXPATHLEN - 1; | |
c7c11a0d | 411 | |
c284f34a WD |
412 | while (pos > 0 && path[pos-1] != '/') |
413 | pos--; | |
5cb37436 | 414 | pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos); |
c7c11a0d DD |
415 | |
416 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
417 | errno = ETXTBSY; | |
418 | return -1; | |
419 | } | |
420 | ||
421 | /* start where the last one left off to reduce chance of clashes */ | |
422 | start = counter; | |
423 | do { | |
434c4098 | 424 | snprintf(&path[pos], MAX_RENAMES_DIGITS+1, "%03d", counter); |
c7c11a0d DD |
425 | if (++counter >= MAX_RENAMES) |
426 | counter = 1; | |
c284f34a | 427 | } while ((rc = access(path, 0)) == 0 && counter != start); |
c7c11a0d | 428 | |
951e826b | 429 | if (INFO_GTE(MISC, 1)) { |
3f0211b6 | 430 | rprintf(FWARNING, "renaming %s to %s because of text busy\n", |
785abd48 | 431 | fname, path); |
4791825d | 432 | } |
c7c11a0d DD |
433 | |
434 | /* maybe we should return rename()'s exit status? Nah. */ | |
435 | if (do_rename(fname, path) != 0) { | |
436 | errno = ETXTBSY; | |
437 | return -1; | |
438 | } | |
439 | return 0; | |
440 | #endif | |
441 | } | |
442 | ||
630f548f | 443 | /* Returns 0 on successful rename, 1 if we successfully copied the file |
3ed8eafc WD |
444 | * across filesystems, -2 if copy_file() failed, and -1 on other errors. |
445 | * If partialptr is not NULL and we need to do a copy, copy the file into | |
446 | * the active partial-dir instead of over the destination file. */ | |
4a19c3b2 | 447 | int robust_rename(const char *from, const char *to, const char *partialptr, |
3ed8eafc | 448 | int mode) |
c7c11a0d | 449 | { |
62c9e6b3 WD |
450 | int tries = 4; |
451 | ||
452 | while (tries--) { | |
453 | if (do_rename(from, to) == 0) | |
454 | return 0; | |
455 | ||
456 | switch (errno) { | |
457 | #ifdef ETXTBSY | |
458 | case ETXTBSY: | |
f1ca7c44 WD |
459 | if (robust_unlink(to) != 0) { |
460 | errno = ETXTBSY; | |
62c9e6b3 | 461 | return -1; |
f1ca7c44 WD |
462 | } |
463 | errno = ETXTBSY; | |
62c9e6b3 | 464 | break; |
c7c11a0d | 465 | #endif |
62c9e6b3 | 466 | case EXDEV: |
3ed8eafc WD |
467 | if (partialptr) { |
468 | if (!handle_partial_dir(partialptr,PDIR_CREATE)) | |
0479eb76 | 469 | return -2; |
3ed8eafc WD |
470 | to = partialptr; |
471 | } | |
3696674b | 472 | if (copy_file(from, to, -1, mode) != 0) |
62c9e6b3 WD |
473 | return -2; |
474 | do_unlink(from); | |
630f548f | 475 | return 1; |
62c9e6b3 WD |
476 | default: |
477 | return -1; | |
478 | } | |
479 | } | |
480 | return -1; | |
feaa89c4 | 481 | } |
3ba62a83 | 482 | |
3ba62a83 AT |
483 | static pid_t all_pids[10]; |
484 | static int num_pids; | |
485 | ||
4cf64834 | 486 | /** Fork and record the pid of the child. **/ |
3ba62a83 AT |
487 | pid_t do_fork(void) |
488 | { | |
489 | pid_t newpid = fork(); | |
5cb37436 | 490 | |
4cf64834 | 491 | if (newpid != 0 && newpid != -1) { |
3ba62a83 AT |
492 | all_pids[num_pids++] = newpid; |
493 | } | |
494 | return newpid; | |
495 | } | |
496 | ||
4cf64834 MP |
497 | /** |
498 | * Kill all children. | |
499 | * | |
500 | * @todo It would be kind of nice to make sure that they are actually | |
501 | * all our children before we kill them, because their pids may have | |
502 | * been recycled by some other process. Perhaps when we wait for a | |
503 | * child, we should remove it from this array. Alternatively we could | |
504 | * perhaps use process groups, but I think that would not work on | |
505 | * ancient Unix versions that don't support them. | |
506 | **/ | |
3ba62a83 AT |
507 | void kill_all(int sig) |
508 | { | |
509 | int i; | |
4cf64834 MP |
510 | |
511 | for (i = 0; i < num_pids; i++) { | |
512 | /* Let's just be a little careful where we | |
513 | * point that gun, hey? See kill(2) for the | |
514 | * magic caused by negative values. */ | |
515 | pid_t p = all_pids[i]; | |
516 | ||
517 | if (p == getpid()) | |
518 | continue; | |
519 | if (p <= 0) | |
520 | continue; | |
521 | ||
522 | kill(p, sig); | |
3ba62a83 AT |
523 | } |
524 | } | |
9486289c | 525 | |
ac13ad10 | 526 | /** Lock a byte range in a open file */ |
31593dd6 | 527 | int lock_range(int fd, int offset, int len) |
0c515f17 | 528 | { |
31593dd6 | 529 | struct flock lock; |
0c515f17 | 530 | |
31593dd6 AT |
531 | lock.l_type = F_WRLCK; |
532 | lock.l_whence = SEEK_SET; | |
533 | lock.l_start = offset; | |
534 | lock.l_len = len; | |
535 | lock.l_pid = 0; | |
5cb37436 | 536 | |
31593dd6 | 537 | return fcntl(fd,F_SETLK,&lock) == 0; |
0c515f17 | 538 | } |
874895d5 | 539 | |
4d30f176 | 540 | #define ENSURE_MEMSPACE(buf, type, sz, req) \ |
bc267e0f WD |
541 | if ((req) > sz && !(buf = realloc_array(buf, type, sz = MAX(sz * 2, req)))) \ |
542 | out_of_memory("glob_expand") | |
4d30f176 WD |
543 | |
544 | static inline void call_glob_match(const char *name, int len, int from_glob, | |
545 | char *arg, int abpos, int fbpos); | |
546 | ||
987a5467 WD |
547 | static struct glob_data { |
548 | char *arg_buf, *filt_buf, **argv; | |
549 | int absize, fbsize, maxargs, argc; | |
550 | } glob; | |
4d30f176 WD |
551 | |
552 | static void glob_match(char *arg, int abpos, int fbpos) | |
4791825d | 553 | { |
4d30f176 WD |
554 | int len; |
555 | char *slash; | |
556 | ||
557 | while (*arg == '.' && arg[1] == '/') { | |
558 | if (fbpos < 0) { | |
bc267e0f | 559 | ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, glob.absize); |
987a5467 | 560 | memcpy(glob.filt_buf, glob.arg_buf, abpos + 1); |
4d30f176 | 561 | fbpos = abpos; |
4791825d | 562 | } |
bc267e0f | 563 | ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + 3); |
987a5467 WD |
564 | glob.arg_buf[abpos++] = *arg++; |
565 | glob.arg_buf[abpos++] = *arg++; | |
566 | glob.arg_buf[abpos] = '\0'; | |
4791825d | 567 | } |
4d30f176 WD |
568 | if ((slash = strchr(arg, '/')) != NULL) { |
569 | *slash = '\0'; | |
570 | len = slash - arg; | |
571 | } else | |
572 | len = strlen(arg); | |
573 | if (strpbrk(arg, "*?[")) { | |
574 | struct dirent *di; | |
575 | DIR *d; | |
576 | ||
987a5467 | 577 | if (!(d = opendir(abpos ? glob.arg_buf : "."))) |
4d30f176 WD |
578 | return; |
579 | while ((di = readdir(d)) != NULL) { | |
580 | char *dname = d_name(di); | |
581 | if (dname[0] == '.' && (dname[1] == '\0' | |
582 | || (dname[1] == '.' && dname[2] == '\0'))) | |
583 | continue; | |
584 | if (!wildmatch(arg, dname)) | |
585 | continue; | |
586 | call_glob_match(dname, strlen(dname), 1, | |
587 | slash ? arg + len + 1 : NULL, | |
588 | abpos, fbpos); | |
589 | } | |
590 | closedir(d); | |
591 | } else { | |
592 | call_glob_match(arg, len, 0, | |
593 | slash ? arg + len + 1 : NULL, | |
594 | abpos, fbpos); | |
595 | } | |
596 | if (slash) | |
597 | *slash = '/'; | |
4791825d | 598 | } |
874895d5 | 599 | |
4d30f176 WD |
600 | static inline void call_glob_match(const char *name, int len, int from_glob, |
601 | char *arg, int abpos, int fbpos) | |
874895d5 | 602 | { |
4d30f176 WD |
603 | char *use_buf; |
604 | ||
987a5467 WD |
605 | ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + len + 2); |
606 | memcpy(glob.arg_buf + abpos, name, len); | |
4d30f176 | 607 | abpos += len; |
987a5467 | 608 | glob.arg_buf[abpos] = '\0'; |
4d30f176 WD |
609 | |
610 | if (fbpos >= 0) { | |
987a5467 WD |
611 | ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, fbpos + len + 2); |
612 | memcpy(glob.filt_buf + fbpos, name, len); | |
4d30f176 | 613 | fbpos += len; |
987a5467 WD |
614 | glob.filt_buf[fbpos] = '\0'; |
615 | use_buf = glob.filt_buf; | |
4d30f176 | 616 | } else |
987a5467 | 617 | use_buf = glob.arg_buf; |
4d30f176 | 618 | |
6db1db54 | 619 | if (from_glob || (arg && len)) { |
4d30f176 WD |
620 | STRUCT_STAT st; |
621 | int is_dir; | |
622 | ||
b5daf530 WD |
623 | if (do_stat(glob.arg_buf, &st) != 0) |
624 | return; | |
625 | is_dir = S_ISDIR(st.st_mode) != 0; | |
626 | if (arg && !is_dir) | |
627 | return; | |
4d30f176 WD |
628 | |
629 | if (daemon_filter_list.head | |
1df02d13 | 630 | && check_filter(&daemon_filter_list, FLOG, use_buf, is_dir) < 0) |
b5daf530 | 631 | return; |
b7061c82 | 632 | } |
874895d5 | 633 | |
4d30f176 | 634 | if (arg) { |
987a5467 WD |
635 | glob.arg_buf[abpos++] = '/'; |
636 | glob.arg_buf[abpos] = '\0'; | |
4d30f176 | 637 | if (fbpos >= 0) { |
987a5467 WD |
638 | glob.filt_buf[fbpos++] = '/'; |
639 | glob.filt_buf[fbpos] = '\0'; | |
4d30f176 WD |
640 | } |
641 | glob_match(arg, abpos, fbpos); | |
642 | } else { | |
987a5467 WD |
643 | ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1); |
644 | if (!(glob.argv[glob.argc++] = strdup(glob.arg_buf))) | |
4d30f176 WD |
645 | out_of_memory("glob_match"); |
646 | } | |
647 | } | |
648 | ||
649 | /* This routine performs wild-card expansion of the pathname in "arg". Any | |
91f625ce WD |
650 | * daemon-excluded files/dirs will not be matched by the wildcards. Returns 0 |
651 | * if a wild-card string is the only returned item (due to matching nothing). */ | |
652 | int glob_expand(const char *arg, char ***argv_p, int *argc_p, int *maxargs_p) | |
4d30f176 | 653 | { |
91f625ce | 654 | int ret, save_argc; |
4d30f176 | 655 | char *s; |
987a5467 WD |
656 | |
657 | if (!arg) { | |
658 | if (glob.filt_buf) | |
659 | free(glob.filt_buf); | |
660 | free(glob.arg_buf); | |
661 | memset(&glob, 0, sizeof glob); | |
91f625ce | 662 | return -1; |
987a5467 | 663 | } |
e42c9458 | 664 | |
4135d091 | 665 | if (sanitize_paths) |
4d30f176 | 666 | s = sanitize_path(NULL, arg, "", 0, SP_KEEP_DOT_DIRS); |
d48810ba | 667 | else { |
4d30f176 | 668 | s = strdup(arg); |
d48810ba WD |
669 | if (!s) |
670 | out_of_memory("glob_expand"); | |
671 | clean_fname(s, CFN_KEEP_DOT_DIRS | |
672 | | CFN_KEEP_TRAILING_SLASH | |
673 | | CFN_COLLAPSE_DOT_DOT_DIRS); | |
674 | } | |
087bf010 | 675 | |
bc267e0f | 676 | ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, MAXPATHLEN); |
987a5467 | 677 | *glob.arg_buf = '\0'; |
4d30f176 | 678 | |
987a5467 WD |
679 | glob.argc = save_argc = *argc_p; |
680 | glob.argv = *argv_p; | |
681 | glob.maxargs = *maxargs_p; | |
4d30f176 | 682 | |
bc267e0f | 683 | ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, 100); |
4d30f176 WD |
684 | |
685 | glob_match(s, 0, -1); | |
686 | ||
687 | /* The arg didn't match anything, so add the failed arg to the list. */ | |
987a5467 WD |
688 | if (glob.argc == save_argc) { |
689 | ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1); | |
690 | glob.argv[glob.argc++] = s; | |
91f625ce WD |
691 | ret = 0; |
692 | } else { | |
4d30f176 | 693 | free(s); |
91f625ce WD |
694 | ret = 1; |
695 | } | |
4d30f176 | 696 | |
987a5467 WD |
697 | *maxargs_p = glob.maxargs; |
698 | *argv_p = glob.argv; | |
699 | *argc_p = glob.argc; | |
91f625ce WD |
700 | |
701 | return ret; | |
874895d5 | 702 | } |
5a96ee05 | 703 | |
4791825d | 704 | /* This routine is only used in daemon mode. */ |
4d30f176 | 705 | void glob_expand_module(char *base1, char *arg, char ***argv_p, int *argc_p, int *maxargs_p) |
087bf010 | 706 | { |
044dc293 | 707 | char *p, *s; |
ba5e128d | 708 | char *base = base1; |
4791825d | 709 | int base_len = strlen(base); |
087bf010 | 710 | |
044dc293 | 711 | if (!arg || !*arg) |
b5bd5542 | 712 | return; |
087bf010 | 713 | |
044dc293 WD |
714 | if (strncmp(arg, base, base_len) == 0) |
715 | arg += base_len; | |
e42c9458 | 716 | |
044dc293 WD |
717 | if (!(arg = strdup(arg))) |
718 | out_of_memory("glob_expand_module"); | |
087bf010 | 719 | |
b5bd5542 | 720 | if (asprintf(&base," %s/", base1) <= 0) |
044dc293 | 721 | out_of_memory("glob_expand_module"); |
4791825d | 722 | base_len++; |
ba5e128d | 723 | |
044dc293 WD |
724 | for (s = arg; *s; s = p + base_len) { |
725 | if ((p = strstr(s, base)) != NULL) | |
b5bd5542 | 726 | *p = '\0'; /* split it at this point */ |
4d30f176 | 727 | glob_expand(s, argv_p, argc_p, maxargs_p); |
b5bd5542 WD |
728 | if (!p) |
729 | break; | |
087bf010 AT |
730 | } |
731 | ||
044dc293 | 732 | free(arg); |
ba5e128d | 733 | free(base); |
087bf010 | 734 | } |
5a96ee05 | 735 | |
ac13ad10 MP |
736 | /** |
737 | * Convert a string to lower case | |
738 | **/ | |
5a96ee05 AT |
739 | void strlower(char *s) |
740 | { | |
741 | while (*s) { | |
2dc7b8bd WD |
742 | if (isUpper(s)) |
743 | *s = toLower(s); | |
5a96ee05 AT |
744 | s++; |
745 | } | |
746 | } | |
e42c9458 | 747 | |
368ad70e WD |
748 | /* Join strings p1 & p2 into "dest" with a guaranteed '/' between them. (If |
749 | * p1 ends with a '/', no extra '/' is inserted.) Returns the length of both | |
a8f7e4b8 WD |
750 | * strings + 1 (if '/' was inserted), regardless of whether the null-terminated |
751 | * string fits into destsize. */ | |
368ad70e WD |
752 | size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2) |
753 | { | |
754 | size_t len = strlcpy(dest, p1, destsize); | |
755 | if (len < destsize - 1) { | |
756 | if (!len || dest[len-1] != '/') | |
757 | dest[len++] = '/'; | |
758 | if (len < destsize - 1) | |
759 | len += strlcpy(dest + len, p2, destsize - len); | |
760 | else { | |
761 | dest[len] = '\0'; | |
762 | len += strlen(p2); | |
763 | } | |
764 | } | |
765 | else | |
766 | len += strlen(p2) + 1; /* Assume we'd insert a '/'. */ | |
767 | return len; | |
768 | } | |
769 | ||
770 | /* Join any number of strings together, putting them in "dest". The return | |
a8f7e4b8 WD |
771 | * value is the length of all the strings, regardless of whether the null- |
772 | * terminated whole fits in destsize. Your list of string pointers must end | |
773 | * with a NULL to indicate the end of the list. */ | |
368ad70e WD |
774 | size_t stringjoin(char *dest, size_t destsize, ...) |
775 | { | |
5cb37436 | 776 | va_list ap; |
368ad70e WD |
777 | size_t len, ret = 0; |
778 | const char *src; | |
779 | ||
780 | va_start(ap, destsize); | |
781 | while (1) { | |
782 | if (!(src = va_arg(ap, const char *))) | |
783 | break; | |
784 | len = strlen(src); | |
785 | ret += len; | |
786 | if (destsize > 1) { | |
787 | if (len >= destsize) | |
788 | len = destsize - 1; | |
789 | memcpy(dest, src, len); | |
790 | destsize -= len; | |
791 | dest += len; | |
792 | } | |
793 | } | |
794 | *dest = '\0'; | |
795 | va_end(ap); | |
796 | ||
797 | return ret; | |
798 | } | |
799 | ||
1d6b8f9a WD |
800 | int count_dir_elements(const char *p) |
801 | { | |
802 | int cnt = 0, new_component = 1; | |
803 | while (*p) { | |
804 | if (*p++ == '/') | |
a8167c66 | 805 | new_component = (*p != '.' || (p[1] != '/' && p[1] != '\0')); |
1d6b8f9a WD |
806 | else if (new_component) { |
807 | new_component = 0; | |
808 | cnt++; | |
809 | } | |
810 | } | |
811 | return cnt; | |
812 | } | |
813 | ||
3795dafd WD |
814 | /* Turns multiple adjacent slashes into a single slash (possible exception: |
815 | * the preserving of two leading slashes at the start), drops all leading or | |
d48810ba WD |
816 | * interior "." elements unless CFN_KEEP_DOT_DIRS is flagged. Will also drop |
817 | * a trailing '.' after a '/' if CFN_DROP_TRAILING_DOT_DIR is flagged, removes | |
818 | * a trailing slash (perhaps after removing the aforementioned dot) unless | |
819 | * CFN_KEEP_TRAILING_SLASH is flagged, and will also collapse ".." elements | |
820 | * (except at the start) if CFN_COLLAPSE_DOT_DOT_DIRS is flagged. If the | |
821 | * resulting name would be empty, returns ".". */ | |
6bb82fe0 | 822 | unsigned int clean_fname(char *name, int flags) |
5243c216 | 823 | { |
e012b94f | 824 | char *limit = name - 1, *t = name, *f = name; |
ebdd24d6 | 825 | int anchored; |
5243c216 | 826 | |
b5bd5542 | 827 | if (!name) |
3104620c | 828 | return 0; |
5243c216 | 829 | |
3795dafd | 830 | if ((anchored = *f == '/') != 0) { |
ebdd24d6 | 831 | *t++ = *f++; |
3795dafd WD |
832 | #ifdef __CYGWIN__ |
833 | /* If there are exactly 2 slashes at the start, preserve | |
834 | * them. Would break daemon excludes unless the paths are | |
835 | * really treated differently, so used this sparingly. */ | |
836 | if (*f == '/' && f[1] != '/') | |
837 | *t++ = *f++; | |
838 | #endif | |
839 | } else if (flags & CFN_KEEP_DOT_DIRS && *f == '.' && f[1] == '/') { | |
6bb82fe0 WD |
840 | *t++ = *f++; |
841 | *t++ = *f++; | |
842 | } | |
ebdd24d6 WD |
843 | while (*f) { |
844 | /* discard extra slashes */ | |
845 | if (*f == '/') { | |
846 | f++; | |
847 | continue; | |
5243c216 | 848 | } |
ebdd24d6 | 849 | if (*f == '.') { |
6bb82fe0 | 850 | /* discard interior "." dirs */ |
d48810ba | 851 | if (f[1] == '/' && !(flags & CFN_KEEP_DOT_DIRS)) { |
e012b94f | 852 | f += 2; |
ebdd24d6 WD |
853 | continue; |
854 | } | |
6bb82fe0 WD |
855 | if (f[1] == '\0' && flags & CFN_DROP_TRAILING_DOT_DIR) |
856 | break; | |
ebdd24d6 | 857 | /* collapse ".." dirs */ |
6bb82fe0 WD |
858 | if (flags & CFN_COLLAPSE_DOT_DOT_DIRS |
859 | && f[1] == '.' && (f[2] == '/' || !f[2])) { | |
ebdd24d6 WD |
860 | char *s = t - 1; |
861 | if (s == name && anchored) { | |
862 | f += 2; | |
863 | continue; | |
864 | } | |
865 | while (s > limit && *--s != '/') {} | |
e012b94f | 866 | if (s != t - 1 && (s < name || *s == '/')) { |
ebdd24d6 WD |
867 | t = s + 1; |
868 | f += 2; | |
869 | continue; | |
870 | } | |
f55c2dfc | 871 | limit = t + 2; |
5243c216 AT |
872 | } |
873 | } | |
ebdd24d6 | 874 | while (*f && (*t++ = *f++) != '/') {} |
5243c216 | 875 | } |
ebdd24d6 | 876 | |
6bb82fe0 | 877 | if (t > name+anchored && t[-1] == '/' && !(flags & CFN_KEEP_TRAILING_SLASH)) |
ebdd24d6 WD |
878 | t--; |
879 | if (t == name) | |
880 | *t++ = '.'; | |
881 | *t = '\0'; | |
3104620c WD |
882 | |
883 | return t - name; | |
5243c216 AT |
884 | } |
885 | ||
84a63795 WD |
886 | /* Make path appear as if a chroot had occurred. This handles a leading |
887 | * "/" (either removing it or expanding it) and any leading or embedded | |
888 | * ".." components that attempt to escape past the module's top dir. | |
b4235b31 | 889 | * |
1d6b8f9a WD |
890 | * If dest is NULL, a buffer is allocated to hold the result. It is legal |
891 | * to call with the dest and the path (p) pointing to the same buffer, but | |
892 | * rootdir will be ignored to avoid expansion of the string. | |
b4235b31 | 893 | * |
1d6b8f9a | 894 | * The rootdir string contains a value to use in place of a leading slash. |
7c73536c | 895 | * Specify NULL to get the default of "module_dir". |
ac13ad10 | 896 | * |
a8167c66 | 897 | * The depth var is a count of how many '..'s to allow at the start of the |
29bca53f | 898 | * path. |
ac13ad10 | 899 | * |
b92693da | 900 | * We also clean the path in a manner similar to clean_fname() but with a |
0f78b815 | 901 | * few differences: |
b92693da WD |
902 | * |
903 | * Turns multiple adjacent slashes into a single slash, gets rid of "." dir | |
904 | * elements (INCLUDING a trailing dot dir), PRESERVES a trailing slash, and | |
905 | * ALWAYS collapses ".." elements (except for those at the start of the | |
906 | * string up to "depth" deep). If the resulting name would be empty, | |
907 | * change it into a ".". */ | |
d48810ba WD |
908 | char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth, |
909 | int flags) | |
1b8e662a | 910 | { |
29bca53f | 911 | char *start, *sanp; |
d48810ba | 912 | int rlen = 0, drop_dot_dirs = !relative_paths || !(flags & SP_KEEP_DOT_DIRS); |
84a63795 WD |
913 | |
914 | if (dest != p) { | |
915 | int plen = strlen(p); | |
1d6b8f9a WD |
916 | if (*p == '/') { |
917 | if (!rootdir) | |
7c73536c | 918 | rootdir = module_dir; |
1d6b8f9a WD |
919 | rlen = strlen(rootdir); |
920 | depth = 0; | |
84a63795 WD |
921 | p++; |
922 | } | |
923 | if (dest) { | |
924 | if (rlen + plen + 1 >= MAXPATHLEN) | |
925 | return NULL; | |
926 | } else if (!(dest = new_array(char, rlen + plen + 1))) | |
927 | out_of_memory("sanitize_path"); | |
928 | if (rlen) { | |
1d6b8f9a | 929 | memcpy(dest, rootdir, rlen); |
84a63795 WD |
930 | if (rlen > 1) |
931 | dest[rlen++] = '/'; | |
932 | } | |
933 | } | |
cb13abfe | 934 | |
d48810ba WD |
935 | if (drop_dot_dirs) { |
936 | while (*p == '.' && p[1] == '/') | |
937 | p += 2; | |
938 | } | |
939 | ||
84a63795 | 940 | start = sanp = dest + rlen; |
d2f6e192 WD |
941 | /* This loop iterates once per filename component in p, pointing at |
942 | * the start of the name (past any prior slash) for each iteration. */ | |
29bca53f | 943 | while (*p) { |
2d41264e WD |
944 | /* discard leading or extra slashes */ |
945 | if (*p == '/') { | |
946 | p++; | |
947 | continue; | |
948 | } | |
d48810ba WD |
949 | if (drop_dot_dirs) { |
950 | if (*p == '.' && (p[1] == '/' || p[1] == '\0')) { | |
7e43da81 WD |
951 | /* skip "." component */ |
952 | p++; | |
953 | continue; | |
954 | } | |
cb13abfe | 955 | } |
c284f34a | 956 | if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) { |
cb13abfe | 957 | /* ".." component followed by slash or end */ |
8e5f029e WD |
958 | if (depth <= 0 || sanp != start) { |
959 | p += 2; | |
960 | if (sanp != start) { | |
961 | /* back up sanp one level */ | |
962 | --sanp; /* now pointing at slash */ | |
d48810ba | 963 | while (sanp > start && sanp[-1] != '/') |
8e5f029e | 964 | sanp--; |
b5f9e67d | 965 | } |
8e5f029e | 966 | continue; |
1b8e662a | 967 | } |
8e5f029e WD |
968 | /* allow depth levels of .. at the beginning */ |
969 | depth--; | |
970 | /* move the virtual beginning to leave the .. alone */ | |
971 | start = sanp + 3; | |
1b8e662a | 972 | } |
2d41264e WD |
973 | /* copy one component through next slash */ |
974 | while (*p && (*sanp++ = *p++) != '/') {} | |
1b8e662a | 975 | } |
84a63795 | 976 | if (sanp == dest) { |
b5f9e67d | 977 | /* ended up with nothing, so put in "." component */ |
44e2e578 | 978 | *sanp++ = '.'; |
b5f9e67d | 979 | } |
44e2e578 | 980 | *sanp = '\0'; |
1b8e662a | 981 | |
84a63795 | 982 | return dest; |
14b61c63 | 983 | } |
5243c216 | 984 | |
a8167c66 | 985 | /* Like chdir(), but it keeps track of the current directory (in the |
a16d8f2b | 986 | * global "curr_dir"), and ensures that the path size doesn't overflow. |
a8167c66 | 987 | * Also cleans the path using the clean_fname() function. */ |
29a89172 | 988 | int change_dir(const char *dir, int set_path_only) |
5243c216 | 989 | { |
5243c216 | 990 | static int initialised; |
4af8fe4e | 991 | unsigned int len; |
5243c216 AT |
992 | |
993 | if (!initialised) { | |
994 | initialised = 1; | |
94112924 WD |
995 | if (getcwd(curr_dir, sizeof curr_dir - 1) == NULL) { |
996 | rsyserr(FERROR, errno, "getcwd()"); | |
997 | exit_cleanup(RERR_FILESELECT); | |
998 | } | |
4af8fe4e | 999 | curr_dir_len = strlen(curr_dir); |
5243c216 AT |
1000 | } |
1001 | ||
4af8fe4e WD |
1002 | if (!dir) /* this call was probably just to initialize */ |
1003 | return 0; | |
c226b7c2 | 1004 | |
4af8fe4e WD |
1005 | len = strlen(dir); |
1006 | if (len == 1 && *dir == '.') | |
1007 | return 1; | |
5243c216 | 1008 | |
5243c216 | 1009 | if (*dir == '/') { |
29a89172 WD |
1010 | if (len >= sizeof curr_dir) { |
1011 | errno = ENAMETOOLONG; | |
1012 | return 0; | |
1013 | } | |
1014 | if (!set_path_only && chdir(dir)) | |
1015 | return 0; | |
4af8fe4e | 1016 | memcpy(curr_dir, dir, len + 1); |
4af8fe4e | 1017 | } else { |
29a89172 WD |
1018 | if (curr_dir_len + 1 + len >= sizeof curr_dir) { |
1019 | errno = ENAMETOOLONG; | |
1020 | return 0; | |
1021 | } | |
1022 | curr_dir[curr_dir_len] = '/'; | |
1023 | memcpy(curr_dir + curr_dir_len + 1, dir, len + 1); | |
1024 | ||
1025 | if (!set_path_only && chdir(curr_dir)) { | |
1026 | curr_dir[curr_dir_len] = '\0'; | |
1027 | return 0; | |
1028 | } | |
5243c216 AT |
1029 | } |
1030 | ||
6bb82fe0 | 1031 | curr_dir_len = clean_fname(curr_dir, CFN_COLLAPSE_DOT_DOT_DIRS); |
a8167c66 WD |
1032 | if (sanitize_paths) { |
1033 | if (module_dirlen > curr_dir_len) | |
1034 | module_dirlen = curr_dir_len; | |
1035 | curr_dir_depth = count_dir_elements(curr_dir + module_dirlen); | |
1036 | } | |
5243c216 | 1037 | |
951e826b | 1038 | if (DEBUG_GTE(CHDIR, 1) && !set_path_only) |
29a89172 | 1039 | rprintf(FINFO, "[%s] change_dir(%s)\n", who_am_i(), curr_dir); |
beef86d0 | 1040 | |
4af8fe4e | 1041 | return 1; |
5243c216 | 1042 | } |
aa9b77a5 | 1043 | |
26e21efc WD |
1044 | /* This will make a relative path absolute and clean it up via clean_fname(). |
1045 | * Returns the string, which might be newly allocated, or NULL on error. */ | |
1046 | char *normalize_path(char *path, BOOL force_newbuf, unsigned int *len_ptr) | |
1047 | { | |
1048 | unsigned int len; | |
1049 | ||
1050 | if (*path != '/') { /* Make path absolute. */ | |
1051 | int len = strlen(path); | |
1052 | if (curr_dir_len + 1 + len >= sizeof curr_dir) | |
1053 | return NULL; | |
1054 | curr_dir[curr_dir_len] = '/'; | |
1055 | memcpy(curr_dir + curr_dir_len + 1, path, len + 1); | |
1056 | if (!(path = strdup(curr_dir))) | |
1057 | out_of_memory("normalize_path"); | |
1058 | curr_dir[curr_dir_len] = '\0'; | |
1059 | } else if (force_newbuf) { | |
1060 | if (!(path = strdup(path))) | |
1061 | out_of_memory("normalize_path"); | |
1062 | } | |
1063 | ||
1064 | len = clean_fname(path, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR); | |
1065 | ||
1066 | if (len_ptr) | |
1067 | *len_ptr = len; | |
1068 | ||
1069 | return path; | |
1070 | } | |
1071 | ||
eb61be19 WD |
1072 | /** |
1073 | * Return a quoted string with the full pathname of the indicated filename. | |
1074 | * The string " (in MODNAME)" may also be appended. The returned pointer | |
1075 | * remains valid until the next time full_fname() is called. | |
1076 | **/ | |
9a5ade18 | 1077 | char *full_fname(const char *fn) |
eb61be19 | 1078 | { |
eb61be19 WD |
1079 | static char *result = NULL; |
1080 | char *m1, *m2, *m3; | |
1081 | char *p1, *p2; | |
1082 | ||
1083 | if (result) | |
1084 | free(result); | |
1085 | ||
1086 | if (*fn == '/') | |
1087 | p1 = p2 = ""; | |
1088 | else { | |
4cff5fa4 | 1089 | p1 = curr_dir + module_dirlen; |
bc83274a WD |
1090 | for (p2 = p1; *p2 == '/'; p2++) {} |
1091 | if (*p2) | |
1092 | p2 = "/"; | |
eb61be19 WD |
1093 | } |
1094 | if (module_id >= 0) { | |
1095 | m1 = " (in "; | |
1096 | m2 = lp_name(module_id); | |
1097 | m3 = ")"; | |
eb61be19 WD |
1098 | } else |
1099 | m1 = m2 = m3 = ""; | |
1100 | ||
c98ad3df WD |
1101 | if (asprintf(&result, "\"%s%s%s\"%s%s%s", p1, p2, fn, m1, m2, m3) <= 0) |
1102 | out_of_memory("full_fname"); | |
eb61be19 WD |
1103 | |
1104 | return result; | |
1105 | } | |
1106 | ||
a7260c40 WD |
1107 | static char partial_fname[MAXPATHLEN]; |
1108 | ||
1109 | char *partial_dir_fname(const char *fname) | |
1110 | { | |
1111 | char *t = partial_fname; | |
1112 | int sz = sizeof partial_fname; | |
1113 | const char *fn; | |
1114 | ||
1115 | if ((fn = strrchr(fname, '/')) != NULL) { | |
1116 | fn++; | |
1117 | if (*partial_dir != '/') { | |
1118 | int len = fn - fname; | |
1119 | strncpy(t, fname, len); /* safe */ | |
1120 | t += len; | |
1121 | sz -= len; | |
1122 | } | |
1123 | } else | |
1124 | fn = fname; | |
1125 | if ((int)pathjoin(t, sz, partial_dir, fn) >= sz) | |
1126 | return NULL; | |
819bfe45 | 1127 | if (daemon_filter_list.head) { |
89363676 WD |
1128 | t = strrchr(partial_fname, '/'); |
1129 | *t = '\0'; | |
1df02d13 | 1130 | if (check_filter(&daemon_filter_list, FLOG, partial_fname, 1) < 0) |
5aa7b20a | 1131 | return NULL; |
89363676 | 1132 | *t = '/'; |
1df02d13 | 1133 | if (check_filter(&daemon_filter_list, FLOG, partial_fname, 0) < 0) |
5aa7b20a WD |
1134 | return NULL; |
1135 | } | |
a7260c40 WD |
1136 | |
1137 | return partial_fname; | |
1138 | } | |
1139 | ||
1140 | /* If no --partial-dir option was specified, we don't need to do anything | |
1141 | * (the partial-dir is essentially '.'), so just return success. */ | |
1142 | int handle_partial_dir(const char *fname, int create) | |
1143 | { | |
1144 | char *fn, *dir; | |
1145 | ||
1146 | if (fname != partial_fname) | |
1147 | return 1; | |
1148 | if (!create && *partial_dir == '/') | |
1149 | return 1; | |
1150 | if (!(fn = strrchr(partial_fname, '/'))) | |
1151 | return 1; | |
1152 | ||
1153 | *fn = '\0'; | |
1154 | dir = partial_fname; | |
1155 | if (create) { | |
1156 | STRUCT_STAT st; | |
a7260c40 | 1157 | int statret = do_lstat(dir, &st); |
a7260c40 | 1158 | if (statret == 0 && !S_ISDIR(st.st_mode)) { |
0479eb76 WD |
1159 | if (do_unlink(dir) < 0) { |
1160 | *fn = '/'; | |
a7260c40 | 1161 | return 0; |
0479eb76 | 1162 | } |
a7260c40 WD |
1163 | statret = -1; |
1164 | } | |
0479eb76 WD |
1165 | if (statret < 0 && do_mkdir(dir, 0700) < 0) { |
1166 | *fn = '/'; | |
a7260c40 | 1167 | return 0; |
0479eb76 | 1168 | } |
a7260c40 WD |
1169 | } else |
1170 | do_rmdir(dir); | |
1171 | *fn = '/'; | |
1172 | ||
1173 | return 1; | |
1174 | } | |
1175 | ||
b4d30300 | 1176 | /* Determine if a symlink points outside the current directory tree. |
036e70b0 MP |
1177 | * This is considered "unsafe" because e.g. when mirroring somebody |
1178 | * else's machine it might allow them to establish a symlink to | |
1179 | * /etc/passwd, and then read it through a web server. | |
1180 | * | |
b4d30300 WD |
1181 | * Returns 1 if unsafe, 0 if safe. |
1182 | * | |
4e5db0ad MP |
1183 | * Null symlinks and absolute symlinks are always unsafe. |
1184 | * | |
1185 | * Basically here we are concerned with symlinks whose target contains | |
1186 | * "..", because this might cause us to walk back up out of the | |
1187 | * transferred directory. We are not allowed to go back up and | |
1188 | * reenter. | |
1189 | * | |
b4d30300 | 1190 | * "dest" is the target of the symlink in question. |
036e70b0 | 1191 | * |
b4d30300 WD |
1192 | * "src" is the top source directory currently applicable at the level |
1193 | * of the referenced symlink. This is usually the symlink's full path | |
1194 | * (including its name), as referenced from the root of the transfer. */ | |
7afa3a4a | 1195 | int unsafe_symlink(const char *dest, const char *src) |
4b957c22 | 1196 | { |
7afa3a4a | 1197 | const char *name, *slash; |
4b957c22 AT |
1198 | int depth = 0; |
1199 | ||
1200 | /* all absolute and null symlinks are unsafe */ | |
b5bd5542 WD |
1201 | if (!dest || !*dest || *dest == '/') |
1202 | return 1; | |
4b957c22 AT |
1203 | |
1204 | /* find out what our safety margin is */ | |
7afa3a4a | 1205 | for (name = src; (slash = strchr(name, '/')) != 0; name = slash+1) { |
b4d30300 WD |
1206 | /* ".." segment starts the count over. "." segment is ignored. */ |
1207 | if (*name == '.' && (name[1] == '/' || (name[1] == '.' && name[2] == '/'))) { | |
1208 | if (name[1] == '.') | |
1209 | depth = 0; | |
1210 | } else | |
4b957c22 | 1211 | depth++; |
b4d30300 | 1212 | while (slash[1] == '/') slash++; /* just in case src isn't clean */ |
4b957c22 | 1213 | } |
b4d30300 | 1214 | if (*name == '.' && name[1] == '.' && name[2] == '\0') |
7afa3a4a | 1215 | depth = 0; |
4b957c22 | 1216 | |
7afa3a4a | 1217 | for (name = dest; (slash = strchr(name, '/')) != 0; name = slash+1) { |
b4d30300 WD |
1218 | if (*name == '.' && (name[1] == '/' || (name[1] == '.' && name[2] == '/'))) { |
1219 | if (name[1] == '.') { | |
1220 | /* if at any point we go outside the current directory | |
1221 | then stop - it is unsafe */ | |
1222 | if (--depth < 0) | |
1223 | return 1; | |
1224 | } | |
1225 | } else | |
4b957c22 | 1226 | depth++; |
b4d30300 | 1227 | while (slash[1] == '/') slash++; |
4b957c22 | 1228 | } |
b4d30300 | 1229 | if (*name == '.' && name[1] == '.' && name[2] == '\0') |
7afa3a4a | 1230 | depth--; |
4b957c22 | 1231 | |
b4d30300 | 1232 | return depth < 0; |
4b957c22 | 1233 | } |
375a4556 | 1234 | |
4a19c3b2 | 1235 | /* Return the date and time as a string. Some callers tweak returned buf. */ |
f7632fc6 AT |
1236 | char *timestring(time_t t) |
1237 | { | |
1238 | static char TimeBuf[200]; | |
1239 | struct tm *tm = localtime(&t); | |
afa73c75 | 1240 | char *p; |
f7632fc6 | 1241 | |
4f5b0756 | 1242 | #ifdef HAVE_STRFTIME |
5cb37436 | 1243 | strftime(TimeBuf, sizeof TimeBuf - 1, "%Y/%m/%d %H:%M:%S", tm); |
f7632fc6 | 1244 | #else |
5cb37436 | 1245 | strlcpy(TimeBuf, asctime(tm), sizeof TimeBuf); |
f7632fc6 AT |
1246 | #endif |
1247 | ||
afa73c75 WD |
1248 | if ((p = strchr(TimeBuf, '\n')) != NULL) |
1249 | *p = '\0'; | |
f7632fc6 | 1250 | |
afa73c75 | 1251 | return TimeBuf; |
f7632fc6 AT |
1252 | } |
1253 | ||
e1bd49d6 MP |
1254 | /** |
1255 | * Sleep for a specified number of milliseconds. | |
1256 | * | |
1257 | * Always returns TRUE. (In the future it might return FALSE if | |
1258 | * interrupted.) | |
1259 | **/ | |
1260 | int msleep(int t) | |
9ec16c83 | 1261 | { |
c284f34a WD |
1262 | int tdiff = 0; |
1263 | struct timeval tval, t1, t2; | |
9ec16c83 AT |
1264 | |
1265 | gettimeofday(&t1, NULL); | |
5cb37436 | 1266 | |
9ec16c83 AT |
1267 | while (tdiff < t) { |
1268 | tval.tv_sec = (t-tdiff)/1000; | |
1269 | tval.tv_usec = 1000*((t-tdiff)%1000); | |
5cb37436 | 1270 | |
9ec16c83 AT |
1271 | errno = 0; |
1272 | select(0,NULL,NULL, NULL, &tval); | |
1273 | ||
1274 | gettimeofday(&t2, NULL); | |
5cb37436 | 1275 | tdiff = (t2.tv_sec - t1.tv_sec)*1000 + |
9ec16c83 AT |
1276 | (t2.tv_usec - t1.tv_usec)/1000; |
1277 | } | |
e1bd49d6 MP |
1278 | |
1279 | return True; | |
9ec16c83 AT |
1280 | } |
1281 | ||
c2b54076 WD |
1282 | /* Determine if two time_t values are equivalent (either exact, or in |
1283 | * the modification timestamp window established by --modify-window). | |
ac13ad10 MP |
1284 | * |
1285 | * @retval 0 if the times should be treated as the same | |
1286 | * | |
1287 | * @retval +1 if the first is later | |
1288 | * | |
1289 | * @retval -1 if the 2nd is later | |
1290 | **/ | |
c2b54076 | 1291 | int cmp_time(time_t file1, time_t file2) |
5b56cc19 | 1292 | { |
5b56cc19 | 1293 | if (file2 > file1) { |
bc6ebcd2 WD |
1294 | if (file2 - file1 <= modify_window) |
1295 | return 0; | |
5b56cc19 AT |
1296 | return -1; |
1297 | } | |
bc6ebcd2 WD |
1298 | if (file1 - file2 <= modify_window) |
1299 | return 0; | |
5b56cc19 AT |
1300 | return 1; |
1301 | } | |
1302 | ||
1303 | ||
1304 | #ifdef __INSURE__XX | |
0f8f98c8 AT |
1305 | #include <dlfcn.h> |
1306 | ||
ac13ad10 MP |
1307 | /** |
1308 | This routine is a trick to immediately catch errors when debugging | |
1309 | with insure. A xterm with a gdb is popped up when insure catches | |
1310 | a error. It is Linux specific. | |
1311 | **/ | |
0f8f98c8 AT |
1312 | int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6) |
1313 | { | |
1314 | static int (*fn)(); | |
1315 | int ret; | |
8950ac03 | 1316 | char *cmd; |
0f8f98c8 | 1317 | |
5cb37436 | 1318 | 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 |
1319 | getpid(), getpid(), getpid()); |
1320 | ||
1321 | if (!fn) { | |
1322 | static void *h; | |
1323 | h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY); | |
1324 | fn = dlsym(h, "_Insure_trap_error"); | |
1325 | } | |
1326 | ||
1327 | ret = fn(a1, a2, a3, a4, a5, a6); | |
1328 | ||
1329 | system(cmd); | |
1330 | ||
8950ac03 AT |
1331 | free(cmd); |
1332 | ||
0f8f98c8 AT |
1333 | return ret; |
1334 | } | |
1335 | #endif | |
58cadc86 | 1336 | |
58cadc86 WD |
1337 | #define MALLOC_MAX 0x40000000 |
1338 | ||
a2dc4d68 | 1339 | void *_new_array(unsigned long num, unsigned int size, int use_calloc) |
58cadc86 WD |
1340 | { |
1341 | if (num >= MALLOC_MAX/size) | |
1342 | return NULL; | |
a2dc4d68 | 1343 | return use_calloc ? calloc(num, size) : malloc(num * size); |
58cadc86 WD |
1344 | } |
1345 | ||
1fe2a353 | 1346 | void *_realloc_array(void *ptr, unsigned int size, size_t num) |
58cadc86 WD |
1347 | { |
1348 | if (num >= MALLOC_MAX/size) | |
1349 | return NULL; | |
58cadc86 WD |
1350 | if (!ptr) |
1351 | return malloc(size * num); | |
1352 | return realloc(ptr, size * num); | |
1353 | } | |
e64ae6d7 WD |
1354 | |
1355 | /* Take a filename and filename length and return the most significant | |
1356 | * filename suffix we can find. This ignores suffixes such as "~", | |
1357 | * ".bak", ".orig", ".~1~", etc. */ | |
1358 | const char *find_filename_suffix(const char *fn, int fn_len, int *len_ptr) | |
1359 | { | |
1360 | const char *suf, *s; | |
1361 | BOOL had_tilde; | |
1362 | int s_len; | |
1363 | ||
1364 | /* One or more dots at the start aren't a suffix. */ | |
1365 | while (fn_len && *fn == '.') fn++, fn_len--; | |
1366 | ||
1367 | /* Ignore the ~ in a "foo~" filename. */ | |
1368 | if (fn_len > 1 && fn[fn_len-1] == '~') | |
1369 | fn_len--, had_tilde = True; | |
1370 | else | |
1371 | had_tilde = False; | |
1372 | ||
1373 | /* Assume we don't find an suffix. */ | |
1374 | suf = ""; | |
1375 | *len_ptr = 0; | |
1376 | ||
1377 | /* Find the last significant suffix. */ | |
1378 | for (s = fn + fn_len; fn_len > 1; ) { | |
1379 | while (*--s != '.' && s != fn) {} | |
1380 | if (s == fn) | |
1381 | break; | |
1382 | s_len = fn_len - (s - fn); | |
1383 | fn_len = s - fn; | |
6012eaa1 | 1384 | if (s_len == 4) { |
e64ae6d7 WD |
1385 | if (strcmp(s+1, "bak") == 0 |
1386 | || strcmp(s+1, "old") == 0) | |
1387 | continue; | |
6012eaa1 | 1388 | } else if (s_len == 5) { |
e64ae6d7 WD |
1389 | if (strcmp(s+1, "orig") == 0) |
1390 | continue; | |
1391 | } else if (s_len > 2 && had_tilde | |
2dc7b8bd | 1392 | && s[1] == '~' && isDigit(s + 2)) |
e64ae6d7 WD |
1393 | continue; |
1394 | *len_ptr = s_len; | |
1395 | suf = s; | |
1396 | if (s_len == 1) | |
1397 | break; | |
1398 | /* Determine if the suffix is all digits. */ | |
1399 | for (s++, s_len--; s_len > 0; s++, s_len--) { | |
2dc7b8bd | 1400 | if (!isDigit(s)) |
e64ae6d7 WD |
1401 | return suf; |
1402 | } | |
1403 | /* An all-digit suffix may not be that signficant. */ | |
1404 | s = suf; | |
1405 | } | |
1406 | ||
1407 | return suf; | |
1408 | } | |
1409 | ||
1410 | /* This is an implementation of the Levenshtein distance algorithm. It | |
1411 | * was implemented to avoid needing a two-dimensional matrix (to save | |
1412 | * memory). It was also tweaked to try to factor in the ASCII distance | |
1413 | * between changed characters as a minor distance quantity. The normal | |
1414 | * Levenshtein units of distance (each signifying a single change between | |
1415 | * the two strings) are defined as a "UNIT". */ | |
1416 | ||
1417 | #define UNIT (1 << 16) | |
1418 | ||
870cf552 | 1419 | uint32 fuzzy_distance(const char *s1, unsigned len1, const char *s2, unsigned len2) |
e64ae6d7 WD |
1420 | { |
1421 | uint32 a[MAXPATHLEN], diag, above, left, diag_inc, above_inc, left_inc; | |
1422 | int32 cost; | |
870cf552 | 1423 | unsigned i1, i2; |
e64ae6d7 WD |
1424 | |
1425 | if (!len1 || !len2) { | |
1426 | if (!len1) { | |
1427 | s1 = s2; | |
1428 | len1 = len2; | |
1429 | } | |
1430 | for (i1 = 0, cost = 0; i1 < len1; i1++) | |
1431 | cost += s1[i1]; | |
1432 | return (int32)len1 * UNIT + cost; | |
1433 | } | |
1434 | ||
1435 | for (i2 = 0; i2 < len2; i2++) | |
1436 | a[i2] = (i2+1) * UNIT; | |
1437 | ||
1438 | for (i1 = 0; i1 < len1; i1++) { | |
1439 | diag = i1 * UNIT; | |
1440 | above = (i1+1) * UNIT; | |
1441 | for (i2 = 0; i2 < len2; i2++) { | |
1442 | left = a[i2]; | |
1443 | if ((cost = *((uchar*)s1+i1) - *((uchar*)s2+i2)) != 0) { | |
1444 | if (cost < 0) | |
1445 | cost = UNIT - cost; | |
1446 | else | |
1447 | cost = UNIT + cost; | |
1448 | } | |
1449 | diag_inc = diag + cost; | |
1450 | left_inc = left + UNIT + *((uchar*)s1+i1); | |
1451 | above_inc = above + UNIT + *((uchar*)s2+i2); | |
1452 | a[i2] = above = left < above | |
1453 | ? (left_inc < diag_inc ? left_inc : diag_inc) | |
1454 | : (above_inc < diag_inc ? above_inc : diag_inc); | |
1455 | diag = left; | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | return a[len2-1]; | |
1460 | } | |
c2b54076 WD |
1461 | |
1462 | #define BB_SLOT_SIZE (16*1024) /* Desired size in bytes */ | |
1463 | #define BB_PER_SLOT_BITS (BB_SLOT_SIZE * 8) /* Number of bits per slot */ | |
1464 | #define BB_PER_SLOT_INTS (BB_SLOT_SIZE / 4) /* Number of int32s per slot */ | |
1465 | ||
1466 | struct bitbag { | |
1467 | uint32 **bits; | |
1468 | int slot_cnt; | |
1469 | }; | |
1470 | ||
1471 | struct bitbag *bitbag_create(int max_ndx) | |
1472 | { | |
1473 | struct bitbag *bb = new(struct bitbag); | |
1474 | bb->slot_cnt = (max_ndx + BB_PER_SLOT_BITS - 1) / BB_PER_SLOT_BITS; | |
1475 | ||
1476 | if (!(bb->bits = (uint32**)calloc(bb->slot_cnt, sizeof (uint32*)))) | |
1477 | out_of_memory("bitbag_create"); | |
1478 | ||
1479 | return bb; | |
1480 | } | |
1481 | ||
1482 | void bitbag_set_bit(struct bitbag *bb, int ndx) | |
1483 | { | |
1484 | int slot = ndx / BB_PER_SLOT_BITS; | |
1485 | ndx %= BB_PER_SLOT_BITS; | |
1486 | ||
1487 | if (!bb->bits[slot]) { | |
1488 | if (!(bb->bits[slot] = (uint32*)calloc(BB_PER_SLOT_INTS, 4))) | |
1489 | out_of_memory("bitbag_set_bit"); | |
1490 | } | |
1491 | ||
1492 | bb->bits[slot][ndx/32] |= 1u << (ndx % 32); | |
1493 | } | |
1494 | ||
1495 | #if 0 /* not needed yet */ | |
1496 | void bitbag_clear_bit(struct bitbag *bb, int ndx) | |
1497 | { | |
1498 | int slot = ndx / BB_PER_SLOT_BITS; | |
1499 | ndx %= BB_PER_SLOT_BITS; | |
1500 | ||
1501 | if (!bb->bits[slot]) | |
1502 | return; | |
1503 | ||
1504 | bb->bits[slot][ndx/32] &= ~(1u << (ndx % 32)); | |
1505 | } | |
1506 | ||
1507 | int bitbag_check_bit(struct bitbag *bb, int ndx) | |
1508 | { | |
1509 | int slot = ndx / BB_PER_SLOT_BITS; | |
1510 | ndx %= BB_PER_SLOT_BITS; | |
1511 | ||
1512 | if (!bb->bits[slot]) | |
1513 | return 0; | |
1514 | ||
1515 | return bb->bits[slot][ndx/32] & (1u << (ndx % 32)) ? 1 : 0; | |
1516 | } | |
1517 | #endif | |
1518 | ||
1519 | /* Call this with -1 to start checking from 0. Returns -1 at the end. */ | |
1520 | int bitbag_next_bit(struct bitbag *bb, int after) | |
1521 | { | |
1522 | uint32 bits, mask; | |
1523 | int i, ndx = after + 1; | |
1524 | int slot = ndx / BB_PER_SLOT_BITS; | |
1525 | ndx %= BB_PER_SLOT_BITS; | |
1526 | ||
1527 | mask = (1u << (ndx % 32)) - 1; | |
1528 | for (i = ndx / 32; slot < bb->slot_cnt; slot++, i = mask = 0) { | |
1529 | if (!bb->bits[slot]) | |
1530 | continue; | |
1531 | for ( ; i < BB_PER_SLOT_INTS; i++, mask = 0) { | |
1532 | if (!(bits = bb->bits[slot][i] & ~mask)) | |
1533 | continue; | |
1534 | /* The xor magic figures out the lowest enabled bit in | |
1535 | * bits, and the switch quickly computes log2(bit). */ | |
1536 | switch (bits ^ (bits & (bits-1))) { | |
1537 | #define LOG2(n) case 1u << n: return slot*BB_PER_SLOT_BITS + i*32 + n | |
1538 | LOG2(0); LOG2(1); LOG2(2); LOG2(3); | |
1539 | LOG2(4); LOG2(5); LOG2(6); LOG2(7); | |
1540 | LOG2(8); LOG2(9); LOG2(10); LOG2(11); | |
1541 | LOG2(12); LOG2(13); LOG2(14); LOG2(15); | |
1542 | LOG2(16); LOG2(17); LOG2(18); LOG2(19); | |
1543 | LOG2(20); LOG2(21); LOG2(22); LOG2(23); | |
1544 | LOG2(24); LOG2(25); LOG2(26); LOG2(27); | |
1545 | LOG2(28); LOG2(29); LOG2(30); LOG2(31); | |
1546 | } | |
1547 | return -1; /* impossible... */ | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | return -1; | |
1552 | } | |
1c3344a1 | 1553 | |
e0c572c5 WD |
1554 | void flist_ndx_push(flist_ndx_list *lp, int ndx) |
1555 | { | |
1556 | struct flist_ndx_item *item; | |
1557 | ||
1558 | if (!(item = new(struct flist_ndx_item))) | |
1559 | out_of_memory("flist_ndx_push"); | |
1560 | item->next = NULL; | |
1561 | item->ndx = ndx; | |
1562 | if (lp->tail) | |
1563 | lp->tail->next = item; | |
1564 | else | |
1565 | lp->head = item; | |
1566 | lp->tail = item; | |
1567 | } | |
1568 | ||
1569 | int flist_ndx_pop(flist_ndx_list *lp) | |
1570 | { | |
1571 | struct flist_ndx_item *next; | |
1572 | int ndx; | |
1573 | ||
1574 | if (!lp->head) | |
1575 | return -1; | |
1576 | ||
1577 | ndx = lp->head->ndx; | |
1578 | next = lp->head->next; | |
1579 | free(lp->head); | |
1580 | lp->head = next; | |
1581 | if (!next) | |
1582 | lp->tail = NULL; | |
1583 | ||
1584 | return ndx; | |
1585 | } | |
1586 | ||
1c3344a1 WD |
1587 | void *expand_item_list(item_list *lp, size_t item_size, |
1588 | const char *desc, int incr) | |
1589 | { | |
1590 | /* First time through, 0 <= 0, so list is expanded. */ | |
1591 | if (lp->malloced <= lp->count) { | |
1592 | void *new_ptr; | |
1593 | size_t new_size = lp->malloced; | |
1594 | if (incr < 0) | |
0b515981 | 1595 | new_size += -incr; /* increase slowly */ |
1c3344a1 WD |
1596 | else if (new_size < (size_t)incr) |
1597 | new_size += incr; | |
1598 | else | |
1599 | new_size *= 2; | |
1fe2a353 WD |
1600 | if (new_size < lp->malloced) |
1601 | overflow_exit("expand_item_list"); | |
1602 | /* Using _realloc_array() lets us pass the size, not a type. */ | |
1603 | new_ptr = _realloc_array(lp->items, item_size, new_size); | |
951e826b | 1604 | if (DEBUG_GTE(FLIST, 3)) { |
6d56efa6 | 1605 | rprintf(FINFO, "[%s] expand %s to %s bytes, did%s move\n", |
adc2476f | 1606 | who_am_i(), desc, big_num(new_size * item_size), |
1c3344a1 WD |
1607 | new_ptr == lp->items ? " not" : ""); |
1608 | } | |
1609 | if (!new_ptr) | |
1610 | out_of_memory("expand_item_list"); | |
1611 | ||
1612 | lp->items = new_ptr; | |
1613 | lp->malloced = new_size; | |
1614 | } | |
1615 | return (char*)lp->items + (lp->count++ * item_size); | |
1616 | } |