2 * Utility routines used in rsync.
4 * Copyright (C) 1996-2000 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
7 * Copyright (C) 2003-2009 Wayne Davison
9 * This program is free software; you can redistribute it and/or modify
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.
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.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, visit the http://fsf.org website.
30 extern int modify_window;
31 extern int relative_paths;
32 extern int preserve_xattrs;
33 extern char *module_dir;
34 extern unsigned int module_dirlen;
35 extern mode_t orig_umask;
36 extern char *partial_dir;
37 extern filter_rule_list daemon_filter_list;
39 int sanitize_paths = 0;
41 char curr_dir[MAXPATHLEN];
42 unsigned int curr_dir_len;
43 int curr_dir_depth; /* This is only set for a sanitizing daemon. */
45 /* Set a fd into nonblocking mode. */
46 void set_nonblocking(int fd)
50 if ((val = fcntl(fd, F_GETFL)) == -1)
52 if (!(val & NONBLOCK_FLAG)) {
54 fcntl(fd, F_SETFL, val);
58 /* Set a fd into blocking mode. */
59 void set_blocking(int fd)
63 if ((val = fcntl(fd, F_GETFL)) == -1)
65 if (val & NONBLOCK_FLAG) {
66 val &= ~NONBLOCK_FLAG;
67 fcntl(fd, F_SETFL, val);
72 * Create a file descriptor pair - like pipe() but use socketpair if
73 * possible (because of blocking issues on pipes).
75 * Always set non-blocking.
77 int fd_pair(int fd[2])
81 #ifdef HAVE_SOCKETPAIR
82 ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
88 set_nonblocking(fd[0]);
89 set_nonblocking(fd[1]);
95 void print_child_argv(const char *prefix, char **cmd)
97 rprintf(FCLIENT, "%s ", prefix);
99 /* Look for characters that ought to be quoted. This
100 * is not a great quoting algorithm, but it's
101 * sufficient for a log message. */
102 if (strspn(*cmd, "abcdefghijklmnopqrstuvwxyz"
103 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
105 ",.-_=+@/") != strlen(*cmd)) {
106 rprintf(FCLIENT, "\"%s\" ", *cmd);
108 rprintf(FCLIENT, "%s ", *cmd);
111 rprintf(FCLIENT, "\n");
114 NORETURN void out_of_memory(const char *str)
116 rprintf(FERROR, "ERROR: out of memory in %s [%s]\n", str, who_am_i());
117 exit_cleanup(RERR_MALLOC);
120 NORETURN void overflow_exit(const char *str)
122 rprintf(FERROR, "ERROR: buffer overflow in %s [%s]\n", str, who_am_i());
123 exit_cleanup(RERR_MALLOC);
126 int set_modtime(const char *fname, time_t modtime, uint32 mod_nsec, mode_t mode)
128 #ifndef CAN_SET_SYMLINK_TIMES
133 if (DEBUG_GTE(TIME, 1)) {
134 rprintf(FINFO, "set modtime of %s to (%ld) %s",
135 fname, (long)modtime,
136 asctime(localtime(&modtime)));
143 #ifdef HAVE_UTIMENSAT
144 struct timespec t[2];
146 t[0].tv_nsec = UTIME_NOW;
147 t[1].tv_sec = modtime;
148 t[1].tv_nsec = mod_nsec;
149 if (utimensat(AT_FDCWD, fname, t, AT_SYMLINK_NOFOLLOW) < 0)
150 return S_ISLNK(mode) && errno == ENOSYS ? 1 : -1;
152 #elif defined HAVE_UTIMES || defined HAVE_LUTIMES
154 t[0].tv_sec = time(NULL);
156 t[1].tv_sec = modtime;
157 t[1].tv_usec = mod_nsec / 1000;
159 if (lutimes(fname, t) < 0)
160 return S_ISLNK(mode) && errno == ENOSYS ? 1 : -1;
163 return utimes(fname, t);
165 #elif defined HAVE_STRUCT_UTIMBUF
167 tbuf.actime = time(NULL);
168 tbuf.modtime = modtime;
169 return utime(fname,&tbuf);
170 #elif defined HAVE_UTIME
174 return utime(fname,t);
176 #error No file-time-modification routine found!
181 /* This creates a new directory with default permissions. Since there
182 * might be some directory-default permissions affecting this, we can't
183 * force the permissions directly using the original umask and mkdir(). */
184 int mkdir_defmode(char *fname)
189 ret = do_mkdir(fname, ACCESSPERMS);
195 /* Create any necessary directories in fname. Any missing directories are
196 * created with default permissions. Returns < 0 on error, or the number
197 * of directories created. */
198 int make_path(char *fname, int flags)
203 if (flags & MKP_SKIP_SLASH) {
204 while (*fname == '/')
208 while (*fname == '.' && fname[1] == '/')
211 if (flags & MKP_DROP_NAME) {
212 end = strrchr(fname, '/');
217 end = fname + strlen(fname);
219 umask(orig_umask); /* NOTE: don't return before setting this back to 0! */
221 /* Try to find an existing dir, starting from the deepest dir. */
223 if (do_mkdir(fname, ACCESSPERMS) == 0) {
227 if (errno != ENOENT) {
239 ret = -ret - 1; /* impossible... */
249 /* Make all the dirs that we didn't find on the way here. */
253 if (ret < 0) /* Skip mkdir on error, but keep restoring the path. */
255 if (do_mkdir(fname, ACCESSPERMS) < 0)
263 if (flags & MKP_DROP_NAME)
270 * Write @p len bytes at @p ptr to descriptor @p desc, retrying if
273 * @retval len upon success
275 * @retval <0 write's (negative) error code
277 * Derived from GNU C's cccp.c.
279 int full_write(int desc, const char *ptr, size_t len)
285 int written = write(desc, ptr, len);
291 total_written += written;
295 return total_written;
299 * Read @p len bytes at @p ptr from descriptor @p desc, retrying if
302 * @retval >0 the actual number of bytes read
306 * @retval <0 for an error.
308 * Derived from GNU C's cccp.c. */
309 static int safe_read(int desc, char *ptr, size_t len)
317 n_chars = read(desc, ptr, len);
318 } while (n_chars < 0 && errno == EINTR);
323 /* Copy a file. If ofd < 0, copy_file unlinks and opens the "dest" file.
324 * Otherwise, it just writes to and closes the provided file descriptor.
325 * In either case, if --xattrs are being preserved, the dest file will
326 * have its xattrs set from the source file.
328 * This is used in conjunction with the --temp-dir, --backup, and
329 * --copy-dest options. */
330 int copy_file(const char *source, const char *dest, int ofd, mode_t mode)
334 int len; /* Number of bytes read into `buf'. */
336 if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
337 int save_errno = errno;
338 rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
344 if (robust_unlink(dest) && errno != ENOENT) {
345 int save_errno = errno;
346 rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
351 if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
352 int save_errno = errno;
353 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest));
360 while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
361 if (full_write(ofd, buf, len) < 0) {
362 int save_errno = errno;
363 rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
372 int save_errno = errno;
373 rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
380 if (close(ifd) < 0) {
381 rsyserr(FWARNING, errno, "close failed on %s",
385 if (close(ofd) < 0) {
386 int save_errno = errno;
387 rsyserr(FERROR_XFER, errno, "close failed on %s",
393 #ifdef SUPPORT_XATTRS
395 copy_xattrs(source, dest);
401 /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */
402 #define MAX_RENAMES_DIGITS 3
403 #define MAX_RENAMES 1000
406 * Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so
407 * rename to <path>/.rsyncNNN instead.
409 * Note that successive rsync runs will shuffle the filenames around a
410 * bit as long as the file is still busy; this is because this function
411 * does not know if the unlink call is due to a new file coming in, or
412 * --delete trying to remove old .rsyncNNN files, hence it renames it
415 int robust_unlink(const char *fname)
418 return do_unlink(fname);
420 static int counter = 1;
422 char path[MAXPATHLEN];
424 rc = do_unlink(fname);
425 if (rc == 0 || errno != ETXTBSY)
428 if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN)
429 pos = MAXPATHLEN - 1;
431 while (pos > 0 && path[pos-1] != '/')
433 pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos);
435 if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) {
440 /* start where the last one left off to reduce chance of clashes */
443 snprintf(&path[pos], MAX_RENAMES_DIGITS+1, "%03d", counter);
444 if (++counter >= MAX_RENAMES)
446 } while ((rc = access(path, 0)) == 0 && counter != start);
448 if (INFO_GTE(MISC, 1)) {
449 rprintf(FWARNING, "renaming %s to %s because of text busy\n",
453 /* maybe we should return rename()'s exit status? Nah. */
454 if (do_rename(fname, path) != 0) {
462 /* Returns 0 on successful rename, 1 if we successfully copied the file
463 * across filesystems, -2 if copy_file() failed, and -1 on other errors.
464 * If partialptr is not NULL and we need to do a copy, copy the file into
465 * the active partial-dir instead of over the destination file. */
466 int robust_rename(const char *from, const char *to, const char *partialptr,
472 if (do_rename(from, to) == 0)
478 if (robust_unlink(to) != 0) {
487 if (!handle_partial_dir(partialptr,PDIR_CREATE))
491 if (copy_file(from, to, -1, mode) != 0)
502 static pid_t all_pids[10];
505 /** Fork and record the pid of the child. **/
508 pid_t newpid = fork();
510 if (newpid != 0 && newpid != -1) {
511 all_pids[num_pids++] = newpid;
519 * @todo It would be kind of nice to make sure that they are actually
520 * all our children before we kill them, because their pids may have
521 * been recycled by some other process. Perhaps when we wait for a
522 * child, we should remove it from this array. Alternatively we could
523 * perhaps use process groups, but I think that would not work on
524 * ancient Unix versions that don't support them.
526 void kill_all(int sig)
530 for (i = 0; i < num_pids; i++) {
531 /* Let's just be a little careful where we
532 * point that gun, hey? See kill(2) for the
533 * magic caused by negative values. */
534 pid_t p = all_pids[i];
545 /* Parse a user name or (optionally) a number into a uid */
546 int user_to_uid(const char *name, uid_t *uid_p, BOOL num_ok)
551 if (num_ok && name[strspn(name, "0123456789")] == '\0') {
555 if (!(pass = getpwnam(name)))
557 *uid_p = pass->pw_uid;
561 /* Parse a group name or (optionally) a number into a gid */
562 int group_to_gid(const char *name, gid_t *gid_p, BOOL num_ok)
567 if (num_ok && name[strspn(name, "0123456789")] == '\0') {
571 if (!(grp = getgrnam(name)))
573 *gid_p = grp->gr_gid;
577 /** Lock a byte range in a open file */
578 int lock_range(int fd, int offset, int len)
582 lock.l_type = F_WRLCK;
583 lock.l_whence = SEEK_SET;
584 lock.l_start = offset;
588 return fcntl(fd,F_SETLK,&lock) == 0;
591 #define ENSURE_MEMSPACE(buf, type, sz, req) \
592 if ((req) > sz && !(buf = realloc_array(buf, type, sz = MAX(sz * 2, req)))) \
593 out_of_memory("glob_expand")
595 static inline void call_glob_match(const char *name, int len, int from_glob,
596 char *arg, int abpos, int fbpos);
598 static struct glob_data {
599 char *arg_buf, *filt_buf, **argv;
600 int absize, fbsize, maxargs, argc;
603 static void glob_match(char *arg, int abpos, int fbpos)
608 while (*arg == '.' && arg[1] == '/') {
610 ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, glob.absize);
611 memcpy(glob.filt_buf, glob.arg_buf, abpos + 1);
614 ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + 3);
615 glob.arg_buf[abpos++] = *arg++;
616 glob.arg_buf[abpos++] = *arg++;
617 glob.arg_buf[abpos] = '\0';
619 if ((slash = strchr(arg, '/')) != NULL) {
624 if (strpbrk(arg, "*?[")) {
628 if (!(d = opendir(abpos ? glob.arg_buf : ".")))
630 while ((di = readdir(d)) != NULL) {
631 char *dname = d_name(di);
632 if (dname[0] == '.' && (dname[1] == '\0'
633 || (dname[1] == '.' && dname[2] == '\0')))
635 if (!wildmatch(arg, dname))
637 call_glob_match(dname, strlen(dname), 1,
638 slash ? arg + len + 1 : NULL,
643 call_glob_match(arg, len, 0,
644 slash ? arg + len + 1 : NULL,
651 static inline void call_glob_match(const char *name, int len, int from_glob,
652 char *arg, int abpos, int fbpos)
656 ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + len + 2);
657 memcpy(glob.arg_buf + abpos, name, len);
659 glob.arg_buf[abpos] = '\0';
662 ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, fbpos + len + 2);
663 memcpy(glob.filt_buf + fbpos, name, len);
665 glob.filt_buf[fbpos] = '\0';
666 use_buf = glob.filt_buf;
668 use_buf = glob.arg_buf;
670 if (from_glob || (arg && len)) {
674 if (do_stat(glob.arg_buf, &st) != 0)
676 is_dir = S_ISDIR(st.st_mode) != 0;
680 if (daemon_filter_list.head
681 && check_filter(&daemon_filter_list, FLOG, use_buf, is_dir) < 0)
686 glob.arg_buf[abpos++] = '/';
687 glob.arg_buf[abpos] = '\0';
689 glob.filt_buf[fbpos++] = '/';
690 glob.filt_buf[fbpos] = '\0';
692 glob_match(arg, abpos, fbpos);
694 ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
695 if (!(glob.argv[glob.argc++] = strdup(glob.arg_buf)))
696 out_of_memory("glob_match");
700 /* This routine performs wild-card expansion of the pathname in "arg". Any
701 * daemon-excluded files/dirs will not be matched by the wildcards. Returns 0
702 * if a wild-card string is the only returned item (due to matching nothing). */
703 int glob_expand(const char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
712 memset(&glob, 0, sizeof glob);
717 s = sanitize_path(NULL, arg, "", 0, SP_KEEP_DOT_DIRS);
721 out_of_memory("glob_expand");
722 clean_fname(s, CFN_KEEP_DOT_DIRS
723 | CFN_KEEP_TRAILING_SLASH
724 | CFN_COLLAPSE_DOT_DOT_DIRS);
727 ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, MAXPATHLEN);
728 *glob.arg_buf = '\0';
730 glob.argc = save_argc = *argc_p;
732 glob.maxargs = *maxargs_p;
734 ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, 100);
736 glob_match(s, 0, -1);
738 /* The arg didn't match anything, so add the failed arg to the list. */
739 if (glob.argc == save_argc) {
740 ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
741 glob.argv[glob.argc++] = s;
748 *maxargs_p = glob.maxargs;
755 /* This routine is only used in daemon mode. */
756 void glob_expand_module(char *base1, char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
760 int base_len = strlen(base);
765 if (strncmp(arg, base, base_len) == 0)
768 if (!(arg = strdup(arg)))
769 out_of_memory("glob_expand_module");
771 if (asprintf(&base," %s/", base1) <= 0)
772 out_of_memory("glob_expand_module");
775 for (s = arg; *s; s = p + base_len) {
776 if ((p = strstr(s, base)) != NULL)
777 *p = '\0'; /* split it at this point */
778 glob_expand(s, argv_p, argc_p, maxargs_p);
788 * Convert a string to lower case
790 void strlower(char *s)
799 /* Join strings p1 & p2 into "dest" with a guaranteed '/' between them. (If
800 * p1 ends with a '/', no extra '/' is inserted.) Returns the length of both
801 * strings + 1 (if '/' was inserted), regardless of whether the null-terminated
802 * string fits into destsize. */
803 size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2)
805 size_t len = strlcpy(dest, p1, destsize);
806 if (len < destsize - 1) {
807 if (!len || dest[len-1] != '/')
809 if (len < destsize - 1)
810 len += strlcpy(dest + len, p2, destsize - len);
817 len += strlen(p2) + 1; /* Assume we'd insert a '/'. */
821 /* Join any number of strings together, putting them in "dest". The return
822 * value is the length of all the strings, regardless of whether the null-
823 * terminated whole fits in destsize. Your list of string pointers must end
824 * with a NULL to indicate the end of the list. */
825 size_t stringjoin(char *dest, size_t destsize, ...)
831 va_start(ap, destsize);
833 if (!(src = va_arg(ap, const char *)))
840 memcpy(dest, src, len);
851 int count_dir_elements(const char *p)
853 int cnt = 0, new_component = 1;
856 new_component = (*p != '.' || (p[1] != '/' && p[1] != '\0'));
857 else if (new_component) {
865 /* Turns multiple adjacent slashes into a single slash (possible exception:
866 * the preserving of two leading slashes at the start), drops all leading or
867 * interior "." elements unless CFN_KEEP_DOT_DIRS is flagged. Will also drop
868 * a trailing '.' after a '/' if CFN_DROP_TRAILING_DOT_DIR is flagged, removes
869 * a trailing slash (perhaps after removing the aforementioned dot) unless
870 * CFN_KEEP_TRAILING_SLASH is flagged, and will also collapse ".." elements
871 * (except at the start) if CFN_COLLAPSE_DOT_DOT_DIRS is flagged. If the
872 * resulting name would be empty, returns ".". */
873 unsigned int clean_fname(char *name, int flags)
875 char *limit = name - 1, *t = name, *f = name;
881 if ((anchored = *f == '/') != 0) {
884 /* If there are exactly 2 slashes at the start, preserve
885 * them. Would break daemon excludes unless the paths are
886 * really treated differently, so used this sparingly. */
887 if (*f == '/' && f[1] != '/')
890 } else if (flags & CFN_KEEP_DOT_DIRS && *f == '.' && f[1] == '/') {
895 /* discard extra slashes */
901 /* discard interior "." dirs */
902 if (f[1] == '/' && !(flags & CFN_KEEP_DOT_DIRS)) {
906 if (f[1] == '\0' && flags & CFN_DROP_TRAILING_DOT_DIR)
908 /* collapse ".." dirs */
909 if (flags & CFN_COLLAPSE_DOT_DOT_DIRS
910 && f[1] == '.' && (f[2] == '/' || !f[2])) {
912 if (s == name && anchored) {
916 while (s > limit && *--s != '/') {}
917 if (s != t - 1 && (s < name || *s == '/')) {
925 while (*f && (*t++ = *f++) != '/') {}
928 if (t > name+anchored && t[-1] == '/' && !(flags & CFN_KEEP_TRAILING_SLASH))
937 /* Make path appear as if a chroot had occurred. This handles a leading
938 * "/" (either removing it or expanding it) and any leading or embedded
939 * ".." components that attempt to escape past the module's top dir.
941 * If dest is NULL, a buffer is allocated to hold the result. It is legal
942 * to call with the dest and the path (p) pointing to the same buffer, but
943 * rootdir will be ignored to avoid expansion of the string.
945 * The rootdir string contains a value to use in place of a leading slash.
946 * Specify NULL to get the default of "module_dir".
948 * The depth var is a count of how many '..'s to allow at the start of the
951 * We also clean the path in a manner similar to clean_fname() but with a
954 * Turns multiple adjacent slashes into a single slash, gets rid of "." dir
955 * elements (INCLUDING a trailing dot dir), PRESERVES a trailing slash, and
956 * ALWAYS collapses ".." elements (except for those at the start of the
957 * string up to "depth" deep). If the resulting name would be empty,
958 * change it into a ".". */
959 char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth,
963 int rlen = 0, drop_dot_dirs = !relative_paths || !(flags & SP_KEEP_DOT_DIRS);
966 int plen = strlen(p);
969 rootdir = module_dir;
970 rlen = strlen(rootdir);
975 if (rlen + plen + 1 >= MAXPATHLEN)
977 } else if (!(dest = new_array(char, rlen + plen + 1)))
978 out_of_memory("sanitize_path");
980 memcpy(dest, rootdir, rlen);
987 while (*p == '.' && p[1] == '/')
991 start = sanp = dest + rlen;
992 /* This loop iterates once per filename component in p, pointing at
993 * the start of the name (past any prior slash) for each iteration. */
995 /* discard leading or extra slashes */
1000 if (drop_dot_dirs) {
1001 if (*p == '.' && (p[1] == '/' || p[1] == '\0')) {
1002 /* skip "." component */
1007 if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) {
1008 /* ".." component followed by slash or end */
1009 if (depth <= 0 || sanp != start) {
1011 if (sanp != start) {
1012 /* back up sanp one level */
1013 --sanp; /* now pointing at slash */
1014 while (sanp > start && sanp[-1] != '/')
1019 /* allow depth levels of .. at the beginning */
1021 /* move the virtual beginning to leave the .. alone */
1024 /* copy one component through next slash */
1025 while (*p && (*sanp++ = *p++) != '/') {}
1028 /* ended up with nothing, so put in "." component */
1036 /* Like chdir(), but it keeps track of the current directory (in the
1037 * global "curr_dir"), and ensures that the path size doesn't overflow.
1038 * Also cleans the path using the clean_fname() function. */
1039 int change_dir(const char *dir, int set_path_only)
1041 static int initialised;
1046 if (getcwd(curr_dir, sizeof curr_dir - 1) == NULL) {
1047 rsyserr(FERROR, errno, "getcwd()");
1048 exit_cleanup(RERR_FILESELECT);
1050 curr_dir_len = strlen(curr_dir);
1053 if (!dir) /* this call was probably just to initialize */
1057 if (len == 1 && *dir == '.')
1061 if (len >= sizeof curr_dir) {
1062 errno = ENAMETOOLONG;
1065 if (!set_path_only && chdir(dir))
1067 memcpy(curr_dir, dir, len + 1);
1069 if (curr_dir_len + 1 + len >= sizeof curr_dir) {
1070 errno = ENAMETOOLONG;
1073 curr_dir[curr_dir_len] = '/';
1074 memcpy(curr_dir + curr_dir_len + 1, dir, len + 1);
1076 if (!set_path_only && chdir(curr_dir)) {
1077 curr_dir[curr_dir_len] = '\0';
1082 curr_dir_len = clean_fname(curr_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1083 if (sanitize_paths) {
1084 if (module_dirlen > curr_dir_len)
1085 module_dirlen = curr_dir_len;
1086 curr_dir_depth = count_dir_elements(curr_dir + module_dirlen);
1089 if (DEBUG_GTE(CHDIR, 1) && !set_path_only)
1090 rprintf(FINFO, "[%s] change_dir(%s)\n", who_am_i(), curr_dir);
1095 /* This will make a relative path absolute and clean it up via clean_fname().
1096 * Returns the string, which might be newly allocated, or NULL on error. */
1097 char *normalize_path(char *path, BOOL force_newbuf, unsigned int *len_ptr)
1101 if (*path != '/') { /* Make path absolute. */
1102 int len = strlen(path);
1103 if (curr_dir_len + 1 + len >= sizeof curr_dir)
1105 curr_dir[curr_dir_len] = '/';
1106 memcpy(curr_dir + curr_dir_len + 1, path, len + 1);
1107 if (!(path = strdup(curr_dir)))
1108 out_of_memory("normalize_path");
1109 curr_dir[curr_dir_len] = '\0';
1110 } else if (force_newbuf) {
1111 if (!(path = strdup(path)))
1112 out_of_memory("normalize_path");
1115 len = clean_fname(path, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR);
1124 * Return a quoted string with the full pathname of the indicated filename.
1125 * The string " (in MODNAME)" may also be appended. The returned pointer
1126 * remains valid until the next time full_fname() is called.
1128 char *full_fname(const char *fn)
1130 static char *result = NULL;
1140 p1 = curr_dir + module_dirlen;
1141 for (p2 = p1; *p2 == '/'; p2++) {}
1145 if (module_id >= 0) {
1147 m2 = lp_name(module_id);
1152 if (asprintf(&result, "\"%s%s%s\"%s%s%s", p1, p2, fn, m1, m2, m3) <= 0)
1153 out_of_memory("full_fname");
1158 static char partial_fname[MAXPATHLEN];
1160 char *partial_dir_fname(const char *fname)
1162 char *t = partial_fname;
1163 int sz = sizeof partial_fname;
1166 if ((fn = strrchr(fname, '/')) != NULL) {
1168 if (*partial_dir != '/') {
1169 int len = fn - fname;
1170 strncpy(t, fname, len); /* safe */
1176 if ((int)pathjoin(t, sz, partial_dir, fn) >= sz)
1178 if (daemon_filter_list.head) {
1179 t = strrchr(partial_fname, '/');
1181 if (check_filter(&daemon_filter_list, FLOG, partial_fname, 1) < 0)
1184 if (check_filter(&daemon_filter_list, FLOG, partial_fname, 0) < 0)
1188 return partial_fname;
1191 /* If no --partial-dir option was specified, we don't need to do anything
1192 * (the partial-dir is essentially '.'), so just return success. */
1193 int handle_partial_dir(const char *fname, int create)
1197 if (fname != partial_fname)
1199 if (!create && *partial_dir == '/')
1201 if (!(fn = strrchr(partial_fname, '/')))
1205 dir = partial_fname;
1208 int statret = do_lstat(dir, &st);
1209 if (statret == 0 && !S_ISDIR(st.st_mode)) {
1210 if (do_unlink(dir) < 0) {
1216 if (statret < 0 && do_mkdir(dir, 0700) < 0) {
1227 /* Computes the depth of the given path, excluding any basename. This
1228 * assumes that the path does not walk through any symlinks.
1230 * For use with unsafe_symlink. */
1231 int path_depth(const char *path)
1233 const char *name, *slash;
1236 for (name = path; (slash = strchr(name, '/')) != 0; name = slash+1) {
1237 /* ".." segment starts the count over. "." segment is ignored. */
1238 if (strncmp(name, "./", 2) == 0)
1240 else if (strncmp(name, "../", 3) == 0)
1244 while (slash[1] == '/') slash++; /* just in case path isn't clean */
1246 if (strcmp(name, "..") == 0)
1252 /* Determine if a symlink points outside the current directory tree.
1253 * This is considered "unsafe" because e.g. when mirroring somebody
1254 * else's machine it might allow them to establish a symlink to
1255 * /etc/passwd, and then read it through a web server.
1257 * Returns 1 if unsafe, 0 if safe.
1259 * Null symlinks and absolute symlinks are always unsafe.
1261 * Basically here we are concerned with symlinks whose target contains
1262 * "..", because this might cause us to walk back up out of the
1263 * transferred directory. We are not allowed to go back up and
1266 * "dest" is the target of the symlink in question.
1268 * "depth" is the depth of the symlink inside the current directory
1269 * tree. It can be computed with "path_depth". */
1270 int unsafe_symlink(const char *dest, int depth)
1272 const char *name, *slash;
1274 /* all absolute and null symlinks are unsafe */
1275 if (!dest || !*dest || *dest == '/')
1278 for (name = dest; (slash = strchr(name, '/')) != 0; name = slash+1) {
1279 if (strncmp(name, "./", 2) == 0)
1281 else if (strncmp(name, "../", 3) == 0) {
1282 /* if at any point we go outside the current directory
1283 then stop - it is unsafe */
1287 /* XXX: We could be walking through another symlink! */
1289 while (slash[1] == '/') slash++;
1291 if (strcmp(name, "..") == 0) {
1299 /* Return the date and time as a string. Some callers tweak returned buf. */
1300 char *timestring(time_t t)
1302 static char TimeBuf[200];
1303 struct tm *tm = localtime(&t);
1306 #ifdef HAVE_STRFTIME
1307 strftime(TimeBuf, sizeof TimeBuf - 1, "%Y/%m/%d %H:%M:%S", tm);
1309 strlcpy(TimeBuf, asctime(tm), sizeof TimeBuf);
1312 if ((p = strchr(TimeBuf, '\n')) != NULL)
1319 * Sleep for a specified number of milliseconds.
1321 * Always returns TRUE. (In the future it might return FALSE if
1327 struct timeval tval, t1, t2;
1329 gettimeofday(&t1, NULL);
1332 tval.tv_sec = (t-tdiff)/1000;
1333 tval.tv_usec = 1000*((t-tdiff)%1000);
1336 select(0,NULL,NULL, NULL, &tval);
1338 gettimeofday(&t2, NULL);
1339 tdiff = (t2.tv_sec - t1.tv_sec)*1000 +
1340 (t2.tv_usec - t1.tv_usec)/1000;
1346 /* Determine if two time_t values are equivalent (either exact, or in
1347 * the modification timestamp window established by --modify-window).
1349 * @retval 0 if the times should be treated as the same
1351 * @retval +1 if the first is later
1353 * @retval -1 if the 2nd is later
1355 int cmp_time(time_t file1, time_t file2)
1357 if (file2 > file1) {
1358 if (file2 - file1 <= modify_window)
1362 if (file1 - file2 <= modify_window)
1372 This routine is a trick to immediately catch errors when debugging
1373 with insure. A xterm with a gdb is popped up when insure catches
1374 a error. It is Linux specific.
1376 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
1382 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'",
1383 getpid(), getpid(), getpid());
1387 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
1388 fn = dlsym(h, "_Insure_trap_error");
1391 ret = fn(a1, a2, a3, a4, a5, a6);
1401 #define MALLOC_MAX 0x40000000
1403 void *_new_array(unsigned long num, unsigned int size, int use_calloc)
1405 if (num >= MALLOC_MAX/size)
1407 return use_calloc ? calloc(num, size) : malloc(num * size);
1410 void *_realloc_array(void *ptr, unsigned int size, size_t num)
1412 if (num >= MALLOC_MAX/size)
1415 return malloc(size * num);
1416 return realloc(ptr, size * num);
1419 /* Take a filename and filename length and return the most significant
1420 * filename suffix we can find. This ignores suffixes such as "~",
1421 * ".bak", ".orig", ".~1~", etc. */
1422 const char *find_filename_suffix(const char *fn, int fn_len, int *len_ptr)
1424 const char *suf, *s;
1428 /* One or more dots at the start aren't a suffix. */
1429 while (fn_len && *fn == '.') fn++, fn_len--;
1431 /* Ignore the ~ in a "foo~" filename. */
1432 if (fn_len > 1 && fn[fn_len-1] == '~')
1433 fn_len--, had_tilde = True;
1437 /* Assume we don't find an suffix. */
1441 /* Find the last significant suffix. */
1442 for (s = fn + fn_len; fn_len > 1; ) {
1443 while (*--s != '.' && s != fn) {}
1446 s_len = fn_len - (s - fn);
1449 if (strcmp(s+1, "bak") == 0
1450 || strcmp(s+1, "old") == 0)
1452 } else if (s_len == 5) {
1453 if (strcmp(s+1, "orig") == 0)
1455 } else if (s_len > 2 && had_tilde
1456 && s[1] == '~' && isDigit(s + 2))
1462 /* Determine if the suffix is all digits. */
1463 for (s++, s_len--; s_len > 0; s++, s_len--) {
1467 /* An all-digit suffix may not be that signficant. */
1474 /* This is an implementation of the Levenshtein distance algorithm. It
1475 * was implemented to avoid needing a two-dimensional matrix (to save
1476 * memory). It was also tweaked to try to factor in the ASCII distance
1477 * between changed characters as a minor distance quantity. The normal
1478 * Levenshtein units of distance (each signifying a single change between
1479 * the two strings) are defined as a "UNIT". */
1481 #define UNIT (1 << 16)
1483 uint32 fuzzy_distance(const char *s1, int len1, const char *s2, int len2)
1485 uint32 a[MAXPATHLEN], diag, above, left, diag_inc, above_inc, left_inc;
1489 if (!len1 || !len2) {
1494 for (i1 = 0, cost = 0; i1 < len1; i1++)
1496 return (int32)len1 * UNIT + cost;
1499 for (i2 = 0; i2 < len2; i2++)
1500 a[i2] = (i2+1) * UNIT;
1502 for (i1 = 0; i1 < len1; i1++) {
1504 above = (i1+1) * UNIT;
1505 for (i2 = 0; i2 < len2; i2++) {
1507 if ((cost = *((uchar*)s1+i1) - *((uchar*)s2+i2)) != 0) {
1513 diag_inc = diag + cost;
1514 left_inc = left + UNIT + *((uchar*)s1+i1);
1515 above_inc = above + UNIT + *((uchar*)s2+i2);
1516 a[i2] = above = left < above
1517 ? (left_inc < diag_inc ? left_inc : diag_inc)
1518 : (above_inc < diag_inc ? above_inc : diag_inc);
1526 #define BB_SLOT_SIZE (16*1024) /* Desired size in bytes */
1527 #define BB_PER_SLOT_BITS (BB_SLOT_SIZE * 8) /* Number of bits per slot */
1528 #define BB_PER_SLOT_INTS (BB_SLOT_SIZE / 4) /* Number of int32s per slot */
1535 struct bitbag *bitbag_create(int max_ndx)
1537 struct bitbag *bb = new(struct bitbag);
1538 bb->slot_cnt = (max_ndx + BB_PER_SLOT_BITS - 1) / BB_PER_SLOT_BITS;
1540 if (!(bb->bits = (uint32**)calloc(bb->slot_cnt, sizeof (uint32*))))
1541 out_of_memory("bitbag_create");
1546 void bitbag_set_bit(struct bitbag *bb, int ndx)
1548 int slot = ndx / BB_PER_SLOT_BITS;
1549 ndx %= BB_PER_SLOT_BITS;
1551 if (!bb->bits[slot]) {
1552 if (!(bb->bits[slot] = (uint32*)calloc(BB_PER_SLOT_INTS, 4)))
1553 out_of_memory("bitbag_set_bit");
1556 bb->bits[slot][ndx/32] |= 1u << (ndx % 32);
1559 #if 0 /* not needed yet */
1560 void bitbag_clear_bit(struct bitbag *bb, int ndx)
1562 int slot = ndx / BB_PER_SLOT_BITS;
1563 ndx %= BB_PER_SLOT_BITS;
1565 if (!bb->bits[slot])
1568 bb->bits[slot][ndx/32] &= ~(1u << (ndx % 32));
1571 int bitbag_check_bit(struct bitbag *bb, int ndx)
1573 int slot = ndx / BB_PER_SLOT_BITS;
1574 ndx %= BB_PER_SLOT_BITS;
1576 if (!bb->bits[slot])
1579 return bb->bits[slot][ndx/32] & (1u << (ndx % 32)) ? 1 : 0;
1583 /* Call this with -1 to start checking from 0. Returns -1 at the end. */
1584 int bitbag_next_bit(struct bitbag *bb, int after)
1587 int i, ndx = after + 1;
1588 int slot = ndx / BB_PER_SLOT_BITS;
1589 ndx %= BB_PER_SLOT_BITS;
1591 mask = (1u << (ndx % 32)) - 1;
1592 for (i = ndx / 32; slot < bb->slot_cnt; slot++, i = mask = 0) {
1593 if (!bb->bits[slot])
1595 for ( ; i < BB_PER_SLOT_INTS; i++, mask = 0) {
1596 if (!(bits = bb->bits[slot][i] & ~mask))
1598 /* The xor magic figures out the lowest enabled bit in
1599 * bits, and the switch quickly computes log2(bit). */
1600 switch (bits ^ (bits & (bits-1))) {
1601 #define LOG2(n) case 1u << n: return slot*BB_PER_SLOT_BITS + i*32 + n
1602 LOG2(0); LOG2(1); LOG2(2); LOG2(3);
1603 LOG2(4); LOG2(5); LOG2(6); LOG2(7);
1604 LOG2(8); LOG2(9); LOG2(10); LOG2(11);
1605 LOG2(12); LOG2(13); LOG2(14); LOG2(15);
1606 LOG2(16); LOG2(17); LOG2(18); LOG2(19);
1607 LOG2(20); LOG2(21); LOG2(22); LOG2(23);
1608 LOG2(24); LOG2(25); LOG2(26); LOG2(27);
1609 LOG2(28); LOG2(29); LOG2(30); LOG2(31);
1611 return -1; /* impossible... */
1618 void flist_ndx_push(flist_ndx_list *lp, int ndx)
1620 struct flist_ndx_item *item;
1622 if (!(item = new(struct flist_ndx_item)))
1623 out_of_memory("flist_ndx_push");
1627 lp->tail->next = item;
1633 int flist_ndx_pop(flist_ndx_list *lp)
1635 struct flist_ndx_item *next;
1641 ndx = lp->head->ndx;
1642 next = lp->head->next;
1651 void *expand_item_list(item_list *lp, size_t item_size,
1652 const char *desc, int incr)
1654 /* First time through, 0 <= 0, so list is expanded. */
1655 if (lp->malloced <= lp->count) {
1657 size_t new_size = lp->malloced;
1659 new_size += -incr; /* increase slowly */
1660 else if (new_size < (size_t)incr)
1664 if (new_size < lp->malloced)
1665 overflow_exit("expand_item_list");
1666 /* Using _realloc_array() lets us pass the size, not a type. */
1667 new_ptr = _realloc_array(lp->items, item_size, new_size);
1668 if (DEBUG_GTE(FLIST, 3)) {
1669 rprintf(FINFO, "[%s] expand %s to %s bytes, did%s move\n",
1670 who_am_i(), desc, big_num(new_size * item_size),
1671 new_ptr == lp->items ? " not" : "");
1674 out_of_memory("expand_item_list");
1676 lp->items = new_ptr;
1677 lp->malloced = new_size;
1679 return (char*)lp->items + (lp->count++ * item_size);