forked from RsyncProject/rsync
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathutil1.c
1729 lines (1515 loc) · 42.5 KB
/
util1.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Utility routines used in rsync.
*
* Copyright (C) 1996-2000 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
* Copyright (C) 2003-2022 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "ifuncs.h"
#include "itypes.h"
#include "inums.h"
extern int dry_run;
extern int module_id;
extern int do_fsync;
extern int protect_args;
extern int modify_window;
extern int relative_paths;
extern int preserve_xattrs;
extern int omit_link_times;
extern int preallocate_files;
extern char *module_dir;
extern unsigned int module_dirlen;
extern char *partial_dir;
extern filter_rule_list daemon_filter_list;
int sanitize_paths = 0;
char curr_dir[MAXPATHLEN];
unsigned int curr_dir_len;
int curr_dir_depth; /* This is only set for a sanitizing daemon. */
/* Set a fd into nonblocking mode. */
void set_nonblocking(int fd)
{
int val;
if ((val = fcntl(fd, F_GETFL)) == -1)
return;
if (!(val & NONBLOCK_FLAG)) {
val |= NONBLOCK_FLAG;
fcntl(fd, F_SETFL, val);
}
}
/* Set a fd into blocking mode. */
void set_blocking(int fd)
{
int val;
if ((val = fcntl(fd, F_GETFL)) == -1)
return;
if (val & NONBLOCK_FLAG) {
val &= ~NONBLOCK_FLAG;
fcntl(fd, F_SETFL, val);
}
}
/**
* Create a file descriptor pair - like pipe() but use socketpair if
* possible (because of blocking issues on pipes).
*
* Always set non-blocking.
*/
int fd_pair(int fd[2])
{
int ret;
#ifdef HAVE_SOCKETPAIR
ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
#else
ret = pipe(fd);
#endif
if (ret == 0) {
set_nonblocking(fd[0]);
set_nonblocking(fd[1]);
}
return ret;
}
void print_child_argv(const char *prefix, char **cmd)
{
int cnt = 0;
rprintf(FCLIENT, "%s ", prefix);
for (; *cmd; cmd++) {
/* Look for characters that ought to be quoted. This
* is not a great quoting algorithm, but it's
* sufficient for a log message. */
if (strspn(*cmd, "abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789"
",.-_=+@/") != strlen(*cmd)) {
rprintf(FCLIENT, "\"%s\" ", *cmd);
} else {
rprintf(FCLIENT, "%s ", *cmd);
}
cnt++;
}
rprintf(FCLIENT, " (%d args)\n", cnt);
}
/* This returns 0 for success, 1 for a symlink if symlink time-setting
* is not possible, or -1 for any other error. */
int set_times(const char *fname, STRUCT_STAT *stp)
{
static int switch_step = 0;
if (DEBUG_GTE(TIME, 1)) {
rprintf(FINFO,
"set modtime, atime of %s to (%ld) %s, (%ld) %s\n",
fname, (long)stp->st_mtime,
timestring(stp->st_mtime), (long)stp->st_atime, timestring(stp->st_atime));
}
switch (switch_step) {
#ifdef HAVE_SETATTRLIST
#include "case_N.h"
if (do_setattrlist_times(fname, stp) == 0)
break;
if (errno != ENOSYS)
return -1;
switch_step++;
#endif
#ifdef HAVE_UTIMENSAT
#include "case_N.h"
if (do_utimensat(fname, stp) == 0)
break;
if (errno != ENOSYS)
return -1;
switch_step++;
#endif
#ifdef HAVE_LUTIMES
#include "case_N.h"
if (do_lutimes(fname, stp) == 0)
break;
if (errno != ENOSYS)
return -1;
switch_step++;
#endif
#include "case_N.h"
switch_step++;
if (!omit_link_times) {
omit_link_times = 1;
if (S_ISLNK(stp->st_mode))
return 1;
}
#include "case_N.h"
#ifdef HAVE_UTIMES
if (do_utimes(fname, stp) == 0)
break;
#else
if (do_utime(fname, stp) == 0)
break;
#endif
return -1;
}
return 0;
}
/* Create any necessary directories in fname. Any missing directories are
* created with default permissions. Returns < 0 on error, or the number
* of directories created. */
int make_path(char *fname, int flags)
{
char *end, *p;
int ret = 0;
if (flags & MKP_SKIP_SLASH) {
while (*fname == '/')
fname++;
}
while (*fname == '.' && fname[1] == '/')
fname += 2;
if (flags & MKP_DROP_NAME) {
end = strrchr(fname, '/');
if (!end || end == fname)
return 0;
*end = '\0';
} else
end = fname + strlen(fname);
/* Try to find an existing dir, starting from the deepest dir. */
for (p = end; ; ) {
if (dry_run) {
STRUCT_STAT st;
if (do_stat(fname, &st) == 0) {
if (S_ISDIR(st.st_mode))
errno = EEXIST;
else
errno = ENOTDIR;
}
} else if (do_mkdir(fname, ACCESSPERMS) == 0) {
ret++;
break;
}
if (errno != ENOENT) {
STRUCT_STAT st;
if (errno != EEXIST || (do_stat(fname, &st) == 0 && !S_ISDIR(st.st_mode)))
ret = -ret - 1;
break;
}
while (1) {
if (p == fname) {
/* We got a relative path that doesn't exist, so assume that '.'
* is there and just break out and create the whole thing. */
p = NULL;
goto double_break;
}
if (*--p == '/') {
if (p == fname) {
/* We reached the "/" dir, which we assume is there. */
goto double_break;
}
*p = '\0';
break;
}
}
}
double_break:
/* Make all the dirs that we didn't find on the way here. */
while (p != end) {
if (p)
*p = '/';
else
p = fname;
p += strlen(p);
if (ret < 0) /* Skip mkdir on error, but keep restoring the path. */
continue;
if (do_mkdir(fname, ACCESSPERMS) < 0)
ret = -ret - 1;
else
ret++;
}
if (flags & MKP_DROP_NAME)
*end = '/';
return ret;
}
/**
* Write @p len bytes at @p ptr to descriptor @p desc, retrying if
* interrupted.
*
* @retval len upon success
*
* @retval <0 write's (negative) error code
*
* Derived from GNU C's cccp.c.
*/
int full_write(int desc, const char *ptr, size_t len)
{
int total_written;
total_written = 0;
while (len > 0) {
int written = write(desc, ptr, len);
if (written < 0) {
if (errno == EINTR)
continue;
return written;
}
total_written += written;
ptr += written;
len -= written;
}
return total_written;
}
/**
* Read @p len bytes at @p ptr from descriptor @p desc, retrying if
* interrupted.
*
* @retval >0 the actual number of bytes read
*
* @retval 0 for EOF
*
* @retval <0 for an error.
*
* Derived from GNU C's cccp.c. */
static int safe_read(int desc, char *ptr, size_t len)
{
int n_chars;
if (len == 0)
return len;
do {
n_chars = read(desc, ptr, len);
} while (n_chars < 0 && errno == EINTR);
return n_chars;
}
/* Remove existing file @dest and reopen, creating a new file with @mode */
static int unlink_and_reopen(const char *dest, mode_t mode)
{
int ofd;
if (robust_unlink(dest) && errno != ENOENT) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
errno = save_errno;
return -1;
}
#ifdef SUPPORT_XATTRS
if (preserve_xattrs)
mode |= S_IWUSR;
#endif
mode &= INITACCESSPERMS;
if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest));
errno = save_errno;
return -1;
}
return ofd;
}
/* Copy contents of file @source to file @dest with mode @mode.
*
* If @tmpfilefd is < 0, copy_file unlinks @dest and then opens a new
* file with name @dest.
*
* Otherwise, copy_file writes to and closes the provided file
* descriptor.
*
* In either case, if --xattrs are being preserved, the dest file will
* have its xattrs set from the source file.
*
* This is used in conjunction with the --temp-dir, --backup, and
* --copy-dest options. */
int copy_file(const char *source, const char *dest, int tmpfilefd, mode_t mode)
{
int ifd, ofd;
char buf[1024 * 8];
int len; /* Number of bytes read into `buf'. */
OFF_T prealloc_len = 0, offset = 0;
if ((ifd = do_open_nofollow(source, O_RDONLY)) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
errno = save_errno;
return -1;
}
if (tmpfilefd >= 0) {
ofd = tmpfilefd;
} else {
ofd = unlink_and_reopen(dest, mode);
if (ofd < 0) {
int save_errno = errno;
close(ifd);
errno = save_errno;
return -1;
}
}
#ifdef SUPPORT_PREALLOCATION
if (preallocate_files) {
STRUCT_STAT srcst;
/* Try to preallocate enough space for file's eventual length. Can
* reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
if (do_fstat(ifd, &srcst) < 0)
rsyserr(FWARNING, errno, "fstat %s", full_fname(source));
else if (srcst.st_size > 0) {
prealloc_len = do_fallocate(ofd, 0, srcst.st_size);
if (prealloc_len < 0)
rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(dest));
}
}
#endif
while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
if (full_write(ofd, buf, len) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
close(ifd);
close(ofd);
errno = save_errno;
return -1;
}
offset += len;
}
if (len < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
close(ifd);
close(ofd);
errno = save_errno;
return -1;
}
if (close(ifd) < 0) {
rsyserr(FWARNING, errno, "close failed on %s",
full_fname(source));
}
/* Source file might have shrunk since we fstatted it.
* Cut off any extra preallocated zeros from dest file. */
if (offset < prealloc_len) {
#ifdef HAVE_FTRUNCATE
/* If we fail to truncate, the dest file may be wrong, so we
* must trigger the "partial transfer" error. */
if (do_ftruncate(ofd, offset) < 0)
rsyserr(FERROR_XFER, errno, "ftruncate %s", full_fname(dest));
#else
rprintf(FERROR_XFER, "no ftruncate for over-long pre-alloc: %s", full_fname(dest));
#endif
}
if (do_fsync && fsync(ofd) < 0) {
int save_errno = errno;
rsyserr(FERROR, errno, "fsync failed on %s", full_fname(dest));
close(ofd);
errno = save_errno;
return -1;
}
if (close(ofd) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "close failed on %s", full_fname(dest));
errno = save_errno;
return -1;
}
#ifdef SUPPORT_XATTRS
if (preserve_xattrs)
copy_xattrs(source, dest);
#endif
return 0;
}
/* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */
#define MAX_RENAMES_DIGITS 3
#define MAX_RENAMES 1000
/**
* Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so
* rename to <path>/.rsyncNNN instead.
*
* Note that successive rsync runs will shuffle the filenames around a
* bit as long as the file is still busy; this is because this function
* does not know if the unlink call is due to a new file coming in, or
* --delete trying to remove old .rsyncNNN files, hence it renames it
* each time.
**/
int robust_unlink(const char *fname)
{
#ifndef ETXTBSY
return do_unlink(fname);
#else
static int counter = 1;
int rc, pos, start;
char path[MAXPATHLEN];
rc = do_unlink(fname);
if (rc == 0 || errno != ETXTBSY)
return rc;
if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN)
pos = MAXPATHLEN - 1;
while (pos > 0 && path[pos-1] != '/')
pos--;
pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos);
if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) {
errno = ETXTBSY;
return -1;
}
/* start where the last one left off to reduce chance of clashes */
start = counter;
do {
snprintf(&path[pos], MAX_RENAMES_DIGITS+1, "%03d", counter);
if (++counter >= MAX_RENAMES)
counter = 1;
} while ((rc = access(path, 0)) == 0 && counter != start);
if (INFO_GTE(MISC, 1)) {
rprintf(FWARNING, "renaming %s to %s because of text busy\n",
fname, path);
}
/* maybe we should return rename()'s exit status? Nah. */
if (do_rename(fname, path) != 0) {
errno = ETXTBSY;
return -1;
}
return 0;
#endif
}
/* Returns 0 on successful rename, 1 if we successfully copied the file
* across filesystems, -2 if copy_file() failed, and -1 on other errors.
* If partialptr is not NULL and we need to do a copy, copy the file into
* the active partial-dir instead of over the destination file. */
int robust_rename(const char *from, const char *to, const char *partialptr,
int mode)
{
int tries = 4;
/* A resumed in-place partial-dir transfer might call us with from and
* to pointing to the same buf if the transfer failed yet again. */
if (from == to)
return 0;
while (tries--) {
if (do_rename(from, to) == 0)
return 0;
switch (errno) {
#ifdef ETXTBSY
case ETXTBSY:
if (robust_unlink(to) != 0) {
errno = ETXTBSY;
return -1;
}
errno = ETXTBSY;
break;
#endif
case EXDEV:
if (partialptr) {
if (!handle_partial_dir(partialptr,PDIR_CREATE))
return -2;
to = partialptr;
}
if (copy_file(from, to, -1, mode) != 0)
return -2;
do_unlink(from);
return 1;
default:
return -1;
}
}
return -1;
}
static pid_t all_pids[10];
static int num_pids;
/** Fork and record the pid of the child. **/
pid_t do_fork(void)
{
pid_t newpid = fork();
if (newpid != 0 && newpid != -1) {
all_pids[num_pids++] = newpid;
}
return newpid;
}
/**
* Kill all children.
*
* @todo It would be kind of nice to make sure that they are actually
* all our children before we kill them, because their pids may have
* been recycled by some other process. Perhaps when we wait for a
* child, we should remove it from this array. Alternatively we could
* perhaps use process groups, but I think that would not work on
* ancient Unix versions that don't support them.
**/
void kill_all(int sig)
{
int i;
for (i = 0; i < num_pids; i++) {
/* Let's just be a little careful where we
* point that gun, hey? See kill(2) for the
* magic caused by negative values. */
pid_t p = all_pids[i];
if (p == getpid())
continue;
if (p <= 0)
continue;
kill(p, sig);
}
}
/** Lock a byte range in a open file */
int lock_range(int fd, int offset, int len)
{
struct flock lock;
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = offset;
lock.l_len = len;
lock.l_pid = 0;
return fcntl(fd,F_SETLK,&lock) == 0;
}
#define ENSURE_MEMSPACE(buf, type, sz, req) \
do { if ((req) > sz) buf = realloc_array(buf, type, sz = MAX(sz * 2, req)); } while(0)
static inline void call_glob_match(const char *name, int len, int from_glob,
char *arg, int abpos, int fbpos);
static struct glob_data {
char *arg_buf, *filt_buf, **argv;
int absize, fbsize, maxargs, argc;
} glob;
static void glob_match(char *arg, int abpos, int fbpos)
{
int len;
char *slash;
while (*arg == '.' && arg[1] == '/') {
if (fbpos < 0) {
ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, glob.absize);
memcpy(glob.filt_buf, glob.arg_buf, abpos + 1);
fbpos = abpos;
}
ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + 3);
glob.arg_buf[abpos++] = *arg++;
glob.arg_buf[abpos++] = *arg++;
glob.arg_buf[abpos] = '\0';
}
if ((slash = strchr(arg, '/')) != NULL) {
*slash = '\0';
len = slash - arg;
} else
len = strlen(arg);
if (strpbrk(arg, "*?[")) {
struct dirent *di;
DIR *d;
if (!(d = opendir(abpos ? glob.arg_buf : ".")))
return;
while ((di = readdir(d)) != NULL) {
char *dname = d_name(di);
if (dname[0] == '.' && (dname[1] == '\0'
|| (dname[1] == '.' && dname[2] == '\0')))
continue;
if (!wildmatch(arg, dname))
continue;
call_glob_match(dname, strlen(dname), 1,
slash ? arg + len + 1 : NULL,
abpos, fbpos);
}
closedir(d);
} else {
call_glob_match(arg, len, 0,
slash ? arg + len + 1 : NULL,
abpos, fbpos);
}
if (slash)
*slash = '/';
}
static inline void call_glob_match(const char *name, int len, int from_glob,
char *arg, int abpos, int fbpos)
{
char *use_buf;
ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + len + 2);
memcpy(glob.arg_buf + abpos, name, len);
abpos += len;
glob.arg_buf[abpos] = '\0';
if (fbpos >= 0) {
ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, fbpos + len + 2);
memcpy(glob.filt_buf + fbpos, name, len);
fbpos += len;
glob.filt_buf[fbpos] = '\0';
use_buf = glob.filt_buf;
} else
use_buf = glob.arg_buf;
if (from_glob || (arg && len)) {
STRUCT_STAT st;
int is_dir;
if (do_stat(glob.arg_buf, &st) != 0)
return;
is_dir = S_ISDIR(st.st_mode) != 0;
if (arg && !is_dir)
return;
if (daemon_filter_list.head
&& check_filter(&daemon_filter_list, FLOG, use_buf, is_dir) < 0)
return;
}
if (arg) {
glob.arg_buf[abpos++] = '/';
glob.arg_buf[abpos] = '\0';
if (fbpos >= 0) {
glob.filt_buf[fbpos++] = '/';
glob.filt_buf[fbpos] = '\0';
}
glob_match(arg, abpos, fbpos);
} else {
ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
glob.argv[glob.argc++] = strdup(glob.arg_buf);
}
}
/* This routine performs wild-card expansion of the pathname in "arg". Any
* daemon-excluded files/dirs will not be matched by the wildcards. Returns 0
* if a wild-card string is the only returned item (due to matching nothing). */
int glob_expand(const char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
{
int ret, save_argc;
char *s;
if (!arg) {
if (glob.filt_buf)
free(glob.filt_buf);
free(glob.arg_buf);
memset(&glob, 0, sizeof glob);
return -1;
}
if (sanitize_paths)
s = sanitize_path(NULL, arg, "", 0, SP_KEEP_DOT_DIRS);
else {
s = strdup(arg);
clean_fname(s, CFN_KEEP_DOT_DIRS | CFN_KEEP_TRAILING_SLASH | CFN_COLLAPSE_DOT_DOT_DIRS);
}
ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, MAXPATHLEN);
*glob.arg_buf = '\0';
glob.argc = save_argc = *argc_p;
glob.argv = *argv_p;
glob.maxargs = *maxargs_p;
ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, 100);
glob_match(s, 0, -1);
/* The arg didn't match anything, so add the failed arg to the list. */
if (glob.argc == save_argc) {
ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
glob.argv[glob.argc++] = s;
ret = 0;
} else {
free(s);
ret = 1;
}
*maxargs_p = glob.maxargs;
*argv_p = glob.argv;
*argc_p = glob.argc;
return ret;
}
/* This routine is only used in daemon mode. */
void glob_expand_module(char *base1, char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
{
char *p, *s;
char *base = base1;
int base_len = strlen(base);
if (!arg || !*arg)
return;
if (strncmp(arg, base, base_len) == 0)
arg += base_len;
if (protect_args) {
glob_expand(arg, argv_p, argc_p, maxargs_p);
return;
}
arg = strdup(arg);
if (asprintf(&base," %s/", base1) < 0)
out_of_memory("glob_expand_module");
base_len++;
for (s = arg; *s; s = p + base_len) {
if ((p = strstr(s, base)) != NULL)
*p = '\0'; /* split it at this point */
glob_expand(s, argv_p, argc_p, maxargs_p);
if (!p)
break;
}
free(arg);
free(base);
}
/**
* Convert a string to lower case
**/
void strlower(char *s)
{
while (*s) {
if (isUpper(s))
*s = toLower(s);
s++;
}
}
/**
* Split a string into tokens based (usually) on whitespace & commas. If the
* string starts with a comma (after skipping any leading whitespace), then
* splitting is done only on commas. No empty tokens are ever returned. */
char *conf_strtok(char *str)
{
static int commas_only = 0;
if (str) {
while (isSpace(str)) str++;
if (*str == ',') {
commas_only = 1;
str++;
} else
commas_only = 0;
}
while (commas_only) {
char *end, *tok = strtok(str, ",");
if (!tok)
return NULL;
/* Trim just leading and trailing whitespace. */
while (isSpace(tok))
tok++;
end = tok + strlen(tok);
while (end > tok && isSpace(end-1))
*--end = '\0';
if (*tok)
return tok;
str = NULL;
}
return strtok(str, " ,\t\r\n");
}
/* Join strings p1 & p2 into "dest" with a guaranteed '/' between them. (If
* p1 ends with a '/', no extra '/' is inserted.) Returns the length of both
* strings + 1 (if '/' was inserted), regardless of whether the null-terminated
* string fits into destsize. */
size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2)
{
size_t len = strlcpy(dest, p1, destsize);
if (len < destsize - 1) {
if (!len || dest[len-1] != '/')
dest[len++] = '/';
if (len < destsize - 1)
len += strlcpy(dest + len, p2, destsize - len);
else {
dest[len] = '\0';
len += strlen(p2);
}
}
else
len += strlen(p2) + 1; /* Assume we'd insert a '/'. */
return len;
}
/* Join any number of strings together, putting them in "dest". The return
* value is the length of all the strings, regardless of whether the null-
* terminated whole fits in destsize. Your list of string pointers must end
* with a NULL to indicate the end of the list. */
size_t stringjoin(char *dest, size_t destsize, ...)
{
va_list ap;
size_t len, ret = 0;
const char *src;
va_start(ap, destsize);
while (1) {
if (!(src = va_arg(ap, const char *)))
break;
len = strlen(src);
ret += len;
if (destsize > 1) {
if (len >= destsize)
len = destsize - 1;
memcpy(dest, src, len);
destsize -= len;
dest += len;
}
}
*dest = '\0';
va_end(ap);
return ret;
}
int count_dir_elements(const char *p)
{
int cnt = 0, new_component = 1;
while (*p) {
if (*p++ == '/')
new_component = (*p != '.' || (p[1] != '/' && p[1] != '\0'));
else if (new_component) {
new_component = 0;
cnt++;
}
}
return cnt;
}
/* Turns multiple adjacent slashes into a single slash (possible exception:
* the preserving of two leading slashes at the start), drops all leading or
* interior "." elements unless CFN_KEEP_DOT_DIRS is flagged. Will also drop
* a trailing '.' after a '/' if CFN_DROP_TRAILING_DOT_DIR is flagged, removes
* a trailing slash (perhaps after removing the aforementioned dot) unless
* CFN_KEEP_TRAILING_SLASH is flagged, and will also collapse ".." elements
* (except at the start) if CFN_COLLAPSE_DOT_DOT_DIRS is flagged. If the
* resulting name would be empty, returns ".". */
int clean_fname(char *name, int flags)
{
char *limit = name - 1, *t = name, *f = name;
int anchored;
if (!name)
return 0;
#define DOT_IS_DOT_DOT_DIR(bp) (bp[1] == '.' && (bp[2] == '/' || !bp[2]))
if ((anchored = *f == '/') != 0) {
*t++ = *f++;
#ifdef __CYGWIN__
/* If there are exactly 2 slashes at the start, preserve
* them. Would break daemon excludes unless the paths are
* really treated differently, so used this sparingly. */
if (*f == '/' && f[1] != '/')
*t++ = *f++;
#endif
} else if (flags & CFN_KEEP_DOT_DIRS && *f == '.' && f[1] == '/') {
*t++ = *f++;
*t++ = *f++;
} else if (flags & CFN_REFUSE_DOT_DOT_DIRS && *f == '.' && DOT_IS_DOT_DOT_DIR(f))
return -1;
while (*f) {
/* discard extra slashes */
if (*f == '/') {
f++;
continue;
}
if (*f == '.') {
/* discard interior "." dirs */
if (f[1] == '/' && !(flags & CFN_KEEP_DOT_DIRS)) {
f += 2;
continue;
}
if (f[1] == '\0' && flags & CFN_DROP_TRAILING_DOT_DIR)
break;
/* collapse ".." dirs */
if (flags & (CFN_COLLAPSE_DOT_DOT_DIRS|CFN_REFUSE_DOT_DOT_DIRS) && DOT_IS_DOT_DOT_DIR(f)) {
char *s = t - 1;
if (flags & CFN_REFUSE_DOT_DOT_DIRS)
return -1;
if (s == name && anchored) {
f += 2;
continue;
}
while (s > limit && *--s != '/') {}
if (s != t - 1 && (s < name || *s == '/')) {
t = s + 1;
f += 2;
continue;
}
limit = t + 2;
}
}
while (*f && (*t++ = *f++) != '/') {}
}