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, 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 #if defined HAVE_UTIMES || defined HAVE_LUTIMES
145 t[0].tv_sec = time(NULL);
147 t[1].tv_sec = modtime;
150 if (lutimes(fname, t) < 0)
151 return S_ISLNK(mode) && errno == ENOSYS ? 1 : -1;
154 return utimes(fname, t);
156 #elif defined HAVE_STRUCT_UTIMBUF
158 tbuf.actime = time(NULL);
159 tbuf.modtime = modtime;
160 return utime(fname,&tbuf);
161 #elif defined HAVE_UTIME
165 return utime(fname,t);
167 #error No file-time-modification routine found!
172 /* This creates a new directory with default permissions. Since there
173 * might be some directory-default permissions affecting this, we can't
174 * force the permissions directly using the original umask and mkdir(). */
175 int mkdir_defmode(char *fname)
180 ret = do_mkdir(fname, ACCESSPERMS);
186 /* Create any necessary directories in fname. Any missing directories are
187 * created with default permissions. Returns < 0 on error, or the number
188 * of directories created. */
189 int make_path(char *fname, int flags)
194 if (flags & MKP_SKIP_SLASH) {
195 while (*fname == '/')
199 while (*fname == '.' && fname[1] == '/')
202 if (flags & MKP_DROP_NAME) {
203 end = strrchr(fname, '/');
208 end = fname + strlen(fname);
210 umask(orig_umask); /* NOTE: don't return before setting this back to 0! */
212 /* Try to find an existing dir, starting from the deepest dir. */
214 if (do_mkdir(fname, ACCESSPERMS) == 0) {
218 if (errno != ENOENT) {
230 ret = -ret - 1; /* impossible... */
240 /* Make all the dirs that we didn't find on the way here. */
244 if (ret < 0) /* Skip mkdir on error, but keep restoring the path. */
246 if (do_mkdir(fname, ACCESSPERMS) < 0)
254 if (flags & MKP_DROP_NAME)
261 * Write @p len bytes at @p ptr to descriptor @p desc, retrying if
264 * @retval len upon success
266 * @retval <0 write's (negative) error code
268 * Derived from GNU C's cccp.c.
270 int full_write(int desc, const char *ptr, size_t len)
276 int written = write(desc, ptr, len);
282 total_written += written;
286 return total_written;
290 * Read @p len bytes at @p ptr from descriptor @p desc, retrying if
293 * @retval >0 the actual number of bytes read
297 * @retval <0 for an error.
299 * Derived from GNU C's cccp.c. */
300 static int safe_read(int desc, char *ptr, size_t len)
308 n_chars = read(desc, ptr, len);
309 } while (n_chars < 0 && errno == EINTR);
314 /* Copy a file. If ofd < 0, copy_file unlinks and opens the "dest" file.
315 * Otherwise, it just writes to and closes the provided file descriptor.
316 * In either case, if --xattrs are being preserved, the dest file will
317 * have its xattrs set from the source file.
319 * This is used in conjunction with the --temp-dir, --backup, and
320 * --copy-dest options. */
321 int copy_file(const char *source, const char *dest, int ofd, mode_t mode)
325 int len; /* Number of bytes read into `buf'. */
327 if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
328 int save_errno = errno;
329 rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
335 if (robust_unlink(dest) && errno != ENOENT) {
336 int save_errno = errno;
337 rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
342 if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
343 int save_errno = errno;
344 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest));
351 while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
352 if (full_write(ofd, buf, len) < 0) {
353 int save_errno = errno;
354 rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
363 int save_errno = errno;
364 rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
371 if (close(ifd) < 0) {
372 rsyserr(FWARNING, errno, "close failed on %s",
376 if (close(ofd) < 0) {
377 int save_errno = errno;
378 rsyserr(FERROR_XFER, errno, "close failed on %s",
384 #ifdef SUPPORT_XATTRS
386 copy_xattrs(source, dest);
392 /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */
393 #define MAX_RENAMES_DIGITS 3
394 #define MAX_RENAMES 1000
397 * Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so
398 * rename to <path>/.rsyncNNN instead.
400 * Note that successive rsync runs will shuffle the filenames around a
401 * bit as long as the file is still busy; this is because this function
402 * does not know if the unlink call is due to a new file coming in, or
403 * --delete trying to remove old .rsyncNNN files, hence it renames it
406 int robust_unlink(const char *fname)
409 return do_unlink(fname);
411 static int counter = 1;
413 char path[MAXPATHLEN];
415 rc = do_unlink(fname);
416 if (rc == 0 || errno != ETXTBSY)
419 if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN)
420 pos = MAXPATHLEN - 1;
422 while (pos > 0 && path[pos-1] != '/')
424 pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos);
426 if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) {
431 /* start where the last one left off to reduce chance of clashes */
434 snprintf(&path[pos], MAX_RENAMES_DIGITS+1, "%03d", counter);
435 if (++counter >= MAX_RENAMES)
437 } while ((rc = access(path, 0)) == 0 && counter != start);
439 if (INFO_GTE(MISC, 1)) {
440 rprintf(FWARNING, "renaming %s to %s because of text busy\n",
444 /* maybe we should return rename()'s exit status? Nah. */
445 if (do_rename(fname, path) != 0) {
453 /* Returns 0 on successful rename, 1 if we successfully copied the file
454 * across filesystems, -2 if copy_file() failed, and -1 on other errors.
455 * If partialptr is not NULL and we need to do a copy, copy the file into
456 * the active partial-dir instead of over the destination file. */
457 int robust_rename(const char *from, const char *to, const char *partialptr,
463 if (do_rename(from, to) == 0)
469 if (robust_unlink(to) != 0) {
478 if (!handle_partial_dir(partialptr,PDIR_CREATE))
482 if (copy_file(from, to, -1, mode) != 0)
493 static pid_t all_pids[10];
496 /** Fork and record the pid of the child. **/
499 pid_t newpid = fork();
501 if (newpid != 0 && newpid != -1) {
502 all_pids[num_pids++] = newpid;
510 * @todo It would be kind of nice to make sure that they are actually
511 * all our children before we kill them, because their pids may have
512 * been recycled by some other process. Perhaps when we wait for a
513 * child, we should remove it from this array. Alternatively we could
514 * perhaps use process groups, but I think that would not work on
515 * ancient Unix versions that don't support them.
517 void kill_all(int sig)
521 for (i = 0; i < num_pids; i++) {
522 /* Let's just be a little careful where we
523 * point that gun, hey? See kill(2) for the
524 * magic caused by negative values. */
525 pid_t p = all_pids[i];
536 /* Parse a user name or (optionally) a number into a uid */
537 int user_to_uid(const char *name, uid_t *uid_p, BOOL num_ok)
542 if (num_ok && name[strspn(name, "0123456789")] == '\0') {
546 if (!(pass = getpwnam(name)))
548 *uid_p = pass->pw_uid;
552 /* Parse a group name or (optionally) a number into a gid */
553 int group_to_gid(const char *name, gid_t *gid_p, BOOL num_ok)
558 if (num_ok && name[strspn(name, "0123456789")] == '\0') {
562 if (!(grp = getgrnam(name)))
564 *gid_p = grp->gr_gid;
568 /** Lock a byte range in a open file */
569 int lock_range(int fd, int offset, int len)
573 lock.l_type = F_WRLCK;
574 lock.l_whence = SEEK_SET;
575 lock.l_start = offset;
579 return fcntl(fd,F_SETLK,&lock) == 0;
582 #define ENSURE_MEMSPACE(buf, type, sz, req) \
583 if ((req) > sz && !(buf = realloc_array(buf, type, sz = MAX(sz * 2, req)))) \
584 out_of_memory("glob_expand")
586 static inline void call_glob_match(const char *name, int len, int from_glob,
587 char *arg, int abpos, int fbpos);
589 static struct glob_data {
590 char *arg_buf, *filt_buf, **argv;
591 int absize, fbsize, maxargs, argc;
594 static void glob_match(char *arg, int abpos, int fbpos)
599 while (*arg == '.' && arg[1] == '/') {
601 ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, glob.absize);
602 memcpy(glob.filt_buf, glob.arg_buf, abpos + 1);
605 ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + 3);
606 glob.arg_buf[abpos++] = *arg++;
607 glob.arg_buf[abpos++] = *arg++;
608 glob.arg_buf[abpos] = '\0';
610 if ((slash = strchr(arg, '/')) != NULL) {
615 if (strpbrk(arg, "*?[")) {
619 if (!(d = opendir(abpos ? glob.arg_buf : ".")))
621 while ((di = readdir(d)) != NULL) {
622 char *dname = d_name(di);
623 if (dname[0] == '.' && (dname[1] == '\0'
624 || (dname[1] == '.' && dname[2] == '\0')))
626 if (!wildmatch(arg, dname))
628 call_glob_match(dname, strlen(dname), 1,
629 slash ? arg + len + 1 : NULL,
634 call_glob_match(arg, len, 0,
635 slash ? arg + len + 1 : NULL,
642 static inline void call_glob_match(const char *name, int len, int from_glob,
643 char *arg, int abpos, int fbpos)
647 ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + len + 2);
648 memcpy(glob.arg_buf + abpos, name, len);
650 glob.arg_buf[abpos] = '\0';
653 ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, fbpos + len + 2);
654 memcpy(glob.filt_buf + fbpos, name, len);
656 glob.filt_buf[fbpos] = '\0';
657 use_buf = glob.filt_buf;
659 use_buf = glob.arg_buf;
661 if (from_glob || (arg && len)) {
665 if (do_stat(glob.arg_buf, &st) != 0)
667 is_dir = S_ISDIR(st.st_mode) != 0;
671 if (daemon_filter_list.head
672 && check_filter(&daemon_filter_list, FLOG, use_buf, is_dir) < 0)
677 glob.arg_buf[abpos++] = '/';
678 glob.arg_buf[abpos] = '\0';
680 glob.filt_buf[fbpos++] = '/';
681 glob.filt_buf[fbpos] = '\0';
683 glob_match(arg, abpos, fbpos);
685 ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
686 if (!(glob.argv[glob.argc++] = strdup(glob.arg_buf)))
687 out_of_memory("glob_match");
691 /* This routine performs wild-card expansion of the pathname in "arg". Any
692 * daemon-excluded files/dirs will not be matched by the wildcards. Returns 0
693 * if a wild-card string is the only returned item (due to matching nothing). */
694 int glob_expand(const char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
703 memset(&glob, 0, sizeof glob);
708 s = sanitize_path(NULL, arg, "", 0, SP_KEEP_DOT_DIRS);
712 out_of_memory("glob_expand");
713 clean_fname(s, CFN_KEEP_DOT_DIRS
714 | CFN_KEEP_TRAILING_SLASH
715 | CFN_COLLAPSE_DOT_DOT_DIRS);
718 ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, MAXPATHLEN);
719 *glob.arg_buf = '\0';
721 glob.argc = save_argc = *argc_p;
723 glob.maxargs = *maxargs_p;
725 ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, 100);
727 glob_match(s, 0, -1);
729 /* The arg didn't match anything, so add the failed arg to the list. */
730 if (glob.argc == save_argc) {
731 ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
732 glob.argv[glob.argc++] = s;
739 *maxargs_p = glob.maxargs;
746 /* This routine is only used in daemon mode. */
747 void glob_expand_module(char *base1, char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
751 int base_len = strlen(base);
756 if (strncmp(arg, base, base_len) == 0)
759 if (!(arg = strdup(arg)))
760 out_of_memory("glob_expand_module");
762 if (asprintf(&base," %s/", base1) <= 0)
763 out_of_memory("glob_expand_module");
766 for (s = arg; *s; s = p + base_len) {
767 if ((p = strstr(s, base)) != NULL)
768 *p = '\0'; /* split it at this point */
769 glob_expand(s, argv_p, argc_p, maxargs_p);
779 * Convert a string to lower case
781 void strlower(char *s)
790 /* Join strings p1 & p2 into "dest" with a guaranteed '/' between them. (If
791 * p1 ends with a '/', no extra '/' is inserted.) Returns the length of both
792 * strings + 1 (if '/' was inserted), regardless of whether the null-terminated
793 * string fits into destsize. */
794 size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2)
796 size_t len = strlcpy(dest, p1, destsize);
797 if (len < destsize - 1) {
798 if (!len || dest[len-1] != '/')
800 if (len < destsize - 1)
801 len += strlcpy(dest + len, p2, destsize - len);
808 len += strlen(p2) + 1; /* Assume we'd insert a '/'. */
812 /* Join any number of strings together, putting them in "dest". The return
813 * value is the length of all the strings, regardless of whether the null-
814 * terminated whole fits in destsize. Your list of string pointers must end
815 * with a NULL to indicate the end of the list. */
816 size_t stringjoin(char *dest, size_t destsize, ...)
822 va_start(ap, destsize);
824 if (!(src = va_arg(ap, const char *)))
831 memcpy(dest, src, len);
842 int count_dir_elements(const char *p)
844 int cnt = 0, new_component = 1;
847 new_component = (*p != '.' || (p[1] != '/' && p[1] != '\0'));
848 else if (new_component) {
856 /* Turns multiple adjacent slashes into a single slash (possible exception:
857 * the preserving of two leading slashes at the start), drops all leading or
858 * interior "." elements unless CFN_KEEP_DOT_DIRS is flagged. Will also drop
859 * a trailing '.' after a '/' if CFN_DROP_TRAILING_DOT_DIR is flagged, removes
860 * a trailing slash (perhaps after removing the aforementioned dot) unless
861 * CFN_KEEP_TRAILING_SLASH is flagged, and will also collapse ".." elements
862 * (except at the start) if CFN_COLLAPSE_DOT_DOT_DIRS is flagged. If the
863 * resulting name would be empty, returns ".". */
864 unsigned int clean_fname(char *name, int flags)
866 char *limit = name - 1, *t = name, *f = name;
872 if ((anchored = *f == '/') != 0) {
875 /* If there are exactly 2 slashes at the start, preserve
876 * them. Would break daemon excludes unless the paths are
877 * really treated differently, so used this sparingly. */
878 if (*f == '/' && f[1] != '/')
881 } else if (flags & CFN_KEEP_DOT_DIRS && *f == '.' && f[1] == '/') {
886 /* discard extra slashes */
892 /* discard interior "." dirs */
893 if (f[1] == '/' && !(flags & CFN_KEEP_DOT_DIRS)) {
897 if (f[1] == '\0' && flags & CFN_DROP_TRAILING_DOT_DIR)
899 /* collapse ".." dirs */
900 if (flags & CFN_COLLAPSE_DOT_DOT_DIRS
901 && f[1] == '.' && (f[2] == '/' || !f[2])) {
903 if (s == name && anchored) {
907 while (s > limit && *--s != '/') {}
908 if (s != t - 1 && (s < name || *s == '/')) {
916 while (*f && (*t++ = *f++) != '/') {}
919 if (t > name+anchored && t[-1] == '/' && !(flags & CFN_KEEP_TRAILING_SLASH))
928 /* Make path appear as if a chroot had occurred. This handles a leading
929 * "/" (either removing it or expanding it) and any leading or embedded
930 * ".." components that attempt to escape past the module's top dir.
932 * If dest is NULL, a buffer is allocated to hold the result. It is legal
933 * to call with the dest and the path (p) pointing to the same buffer, but
934 * rootdir will be ignored to avoid expansion of the string.
936 * The rootdir string contains a value to use in place of a leading slash.
937 * Specify NULL to get the default of "module_dir".
939 * The depth var is a count of how many '..'s to allow at the start of the
942 * We also clean the path in a manner similar to clean_fname() but with a
945 * Turns multiple adjacent slashes into a single slash, gets rid of "." dir
946 * elements (INCLUDING a trailing dot dir), PRESERVES a trailing slash, and
947 * ALWAYS collapses ".." elements (except for those at the start of the
948 * string up to "depth" deep). If the resulting name would be empty,
949 * change it into a ".". */
950 char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth,
954 int rlen = 0, drop_dot_dirs = !relative_paths || !(flags & SP_KEEP_DOT_DIRS);
957 int plen = strlen(p);
960 rootdir = module_dir;
961 rlen = strlen(rootdir);
966 if (rlen + plen + 1 >= MAXPATHLEN)
968 } else if (!(dest = new_array(char, rlen + plen + 1)))
969 out_of_memory("sanitize_path");
971 memcpy(dest, rootdir, rlen);
978 while (*p == '.' && p[1] == '/')
982 start = sanp = dest + rlen;
983 /* This loop iterates once per filename component in p, pointing at
984 * the start of the name (past any prior slash) for each iteration. */
986 /* discard leading or extra slashes */
992 if (*p == '.' && (p[1] == '/' || p[1] == '\0')) {
993 /* skip "." component */
998 if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) {
999 /* ".." component followed by slash or end */
1000 if (depth <= 0 || sanp != start) {
1002 if (sanp != start) {
1003 /* back up sanp one level */
1004 --sanp; /* now pointing at slash */
1005 while (sanp > start && sanp[-1] != '/')
1010 /* allow depth levels of .. at the beginning */
1012 /* move the virtual beginning to leave the .. alone */
1015 /* copy one component through next slash */
1016 while (*p && (*sanp++ = *p++) != '/') {}
1019 /* ended up with nothing, so put in "." component */
1027 /* Like chdir(), but it keeps track of the current directory (in the
1028 * global "curr_dir"), and ensures that the path size doesn't overflow.
1029 * Also cleans the path using the clean_fname() function. */
1030 int change_dir(const char *dir, int set_path_only)
1032 static int initialised;
1037 if (getcwd(curr_dir, sizeof curr_dir - 1) == NULL) {
1038 rsyserr(FERROR, errno, "getcwd()");
1039 exit_cleanup(RERR_FILESELECT);
1041 curr_dir_len = strlen(curr_dir);
1044 if (!dir) /* this call was probably just to initialize */
1048 if (len == 1 && *dir == '.')
1052 if (len >= sizeof curr_dir) {
1053 errno = ENAMETOOLONG;
1056 if (!set_path_only && chdir(dir))
1058 memcpy(curr_dir, dir, len + 1);
1060 if (curr_dir_len + 1 + len >= sizeof curr_dir) {
1061 errno = ENAMETOOLONG;
1064 curr_dir[curr_dir_len] = '/';
1065 memcpy(curr_dir + curr_dir_len + 1, dir, len + 1);
1067 if (!set_path_only && chdir(curr_dir)) {
1068 curr_dir[curr_dir_len] = '\0';
1073 curr_dir_len = clean_fname(curr_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1074 if (sanitize_paths) {
1075 if (module_dirlen > curr_dir_len)
1076 module_dirlen = curr_dir_len;
1077 curr_dir_depth = count_dir_elements(curr_dir + module_dirlen);
1080 if (DEBUG_GTE(CHDIR, 1) && !set_path_only)
1081 rprintf(FINFO, "[%s] change_dir(%s)\n", who_am_i(), curr_dir);
1086 /* This will make a relative path absolute and clean it up via clean_fname().
1087 * Returns the string, which might be newly allocated, or NULL on error. */
1088 char *normalize_path(char *path, BOOL force_newbuf, unsigned int *len_ptr)
1092 if (*path != '/') { /* Make path absolute. */
1093 int len = strlen(path);
1094 if (curr_dir_len + 1 + len >= sizeof curr_dir)
1096 curr_dir[curr_dir_len] = '/';
1097 memcpy(curr_dir + curr_dir_len + 1, path, len + 1);
1098 if (!(path = strdup(curr_dir)))
1099 out_of_memory("normalize_path");
1100 curr_dir[curr_dir_len] = '\0';
1101 } else if (force_newbuf) {
1102 if (!(path = strdup(path)))
1103 out_of_memory("normalize_path");
1106 len = clean_fname(path, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR);
1115 * Return a quoted string with the full pathname of the indicated filename.
1116 * The string " (in MODNAME)" may also be appended. The returned pointer
1117 * remains valid until the next time full_fname() is called.
1119 char *full_fname(const char *fn)
1121 static char *result = NULL;
1131 p1 = curr_dir + module_dirlen;
1132 for (p2 = p1; *p2 == '/'; p2++) {}
1136 if (module_id >= 0) {
1138 m2 = lp_name(module_id);
1143 if (asprintf(&result, "\"%s%s%s\"%s%s%s", p1, p2, fn, m1, m2, m3) <= 0)
1144 out_of_memory("full_fname");
1149 static char partial_fname[MAXPATHLEN];
1151 char *partial_dir_fname(const char *fname)
1153 char *t = partial_fname;
1154 int sz = sizeof partial_fname;
1157 if ((fn = strrchr(fname, '/')) != NULL) {
1159 if (*partial_dir != '/') {
1160 int len = fn - fname;
1161 strncpy(t, fname, len); /* safe */
1167 if ((int)pathjoin(t, sz, partial_dir, fn) >= sz)
1169 if (daemon_filter_list.head) {
1170 t = strrchr(partial_fname, '/');
1172 if (check_filter(&daemon_filter_list, FLOG, partial_fname, 1) < 0)
1175 if (check_filter(&daemon_filter_list, FLOG, partial_fname, 0) < 0)
1179 return partial_fname;
1182 /* If no --partial-dir option was specified, we don't need to do anything
1183 * (the partial-dir is essentially '.'), so just return success. */
1184 int handle_partial_dir(const char *fname, int create)
1188 if (fname != partial_fname)
1190 if (!create && *partial_dir == '/')
1192 if (!(fn = strrchr(partial_fname, '/')))
1196 dir = partial_fname;
1199 int statret = do_lstat(dir, &st);
1200 if (statret == 0 && !S_ISDIR(st.st_mode)) {
1201 if (do_unlink(dir) < 0) {
1207 if (statret < 0 && do_mkdir(dir, 0700) < 0) {
1218 /* Determine if a symlink points outside the current directory tree.
1219 * This is considered "unsafe" because e.g. when mirroring somebody
1220 * else's machine it might allow them to establish a symlink to
1221 * /etc/passwd, and then read it through a web server.
1223 * Returns 1 if unsafe, 0 if safe.
1225 * Null symlinks and absolute symlinks are always unsafe.
1227 * Basically here we are concerned with symlinks whose target contains
1228 * "..", because this might cause us to walk back up out of the
1229 * transferred directory. We are not allowed to go back up and
1232 * "dest" is the target of the symlink in question.
1234 * "src" is the top source directory currently applicable at the level
1235 * of the referenced symlink. This is usually the symlink's full path
1236 * (including its name), as referenced from the root of the transfer. */
1237 int unsafe_symlink(const char *dest, const char *src)
1239 const char *name, *slash;
1242 /* all absolute and null symlinks are unsafe */
1243 if (!dest || !*dest || *dest == '/')
1246 /* find out what our safety margin is */
1247 for (name = src; (slash = strchr(name, '/')) != 0; name = slash+1) {
1248 /* ".." segment starts the count over. "." segment is ignored. */
1249 if (*name == '.' && (name[1] == '/' || (name[1] == '.' && name[2] == '/'))) {
1254 while (slash[1] == '/') slash++; /* just in case src isn't clean */
1256 if (*name == '.' && name[1] == '.' && name[2] == '\0')
1259 for (name = dest; (slash = strchr(name, '/')) != 0; name = slash+1) {
1260 if (*name == '.' && (name[1] == '/' || (name[1] == '.' && name[2] == '/'))) {
1261 if (name[1] == '.') {
1262 /* if at any point we go outside the current directory
1263 then stop - it is unsafe */
1269 while (slash[1] == '/') slash++;
1271 if (*name == '.' && name[1] == '.' && name[2] == '\0')
1277 /* Return the date and time as a string. Some callers tweak returned buf. */
1278 char *timestring(time_t t)
1280 static char TimeBuf[200];
1281 struct tm *tm = localtime(&t);
1284 #ifdef HAVE_STRFTIME
1285 strftime(TimeBuf, sizeof TimeBuf - 1, "%Y/%m/%d %H:%M:%S", tm);
1287 strlcpy(TimeBuf, asctime(tm), sizeof TimeBuf);
1290 if ((p = strchr(TimeBuf, '\n')) != NULL)
1297 * Sleep for a specified number of milliseconds.
1299 * Always returns TRUE. (In the future it might return FALSE if
1305 struct timeval tval, t1, t2;
1307 gettimeofday(&t1, NULL);
1310 tval.tv_sec = (t-tdiff)/1000;
1311 tval.tv_usec = 1000*((t-tdiff)%1000);
1314 select(0,NULL,NULL, NULL, &tval);
1316 gettimeofday(&t2, NULL);
1317 tdiff = (t2.tv_sec - t1.tv_sec)*1000 +
1318 (t2.tv_usec - t1.tv_usec)/1000;
1324 /* Determine if two time_t values are equivalent (either exact, or in
1325 * the modification timestamp window established by --modify-window).
1327 * @retval 0 if the times should be treated as the same
1329 * @retval +1 if the first is later
1331 * @retval -1 if the 2nd is later
1333 int cmp_time(time_t file1, time_t file2)
1335 if (file2 > file1) {
1336 if (file2 - file1 <= modify_window)
1340 if (file1 - file2 <= modify_window)
1350 This routine is a trick to immediately catch errors when debugging
1351 with insure. A xterm with a gdb is popped up when insure catches
1352 a error. It is Linux specific.
1354 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
1360 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'",
1361 getpid(), getpid(), getpid());
1365 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
1366 fn = dlsym(h, "_Insure_trap_error");
1369 ret = fn(a1, a2, a3, a4, a5, a6);
1379 #define MALLOC_MAX 0x40000000
1381 void *_new_array(unsigned long num, unsigned int size, int use_calloc)
1383 if (num >= MALLOC_MAX/size)
1385 return use_calloc ? calloc(num, size) : malloc(num * size);
1388 void *_realloc_array(void *ptr, unsigned int size, size_t num)
1390 if (num >= MALLOC_MAX/size)
1393 return malloc(size * num);
1394 return realloc(ptr, size * num);
1397 /* Take a filename and filename length and return the most significant
1398 * filename suffix we can find. This ignores suffixes such as "~",
1399 * ".bak", ".orig", ".~1~", etc. */
1400 const char *find_filename_suffix(const char *fn, int fn_len, int *len_ptr)
1402 const char *suf, *s;
1406 /* One or more dots at the start aren't a suffix. */
1407 while (fn_len && *fn == '.') fn++, fn_len--;
1409 /* Ignore the ~ in a "foo~" filename. */
1410 if (fn_len > 1 && fn[fn_len-1] == '~')
1411 fn_len--, had_tilde = True;
1415 /* Assume we don't find an suffix. */
1419 /* Find the last significant suffix. */
1420 for (s = fn + fn_len; fn_len > 1; ) {
1421 while (*--s != '.' && s != fn) {}
1424 s_len = fn_len - (s - fn);
1427 if (strcmp(s+1, "bak") == 0
1428 || strcmp(s+1, "old") == 0)
1430 } else if (s_len == 5) {
1431 if (strcmp(s+1, "orig") == 0)
1433 } else if (s_len > 2 && had_tilde
1434 && s[1] == '~' && isDigit(s + 2))
1440 /* Determine if the suffix is all digits. */
1441 for (s++, s_len--; s_len > 0; s++, s_len--) {
1445 /* An all-digit suffix may not be that signficant. */
1452 /* This is an implementation of the Levenshtein distance algorithm. It
1453 * was implemented to avoid needing a two-dimensional matrix (to save
1454 * memory). It was also tweaked to try to factor in the ASCII distance
1455 * between changed characters as a minor distance quantity. The normal
1456 * Levenshtein units of distance (each signifying a single change between
1457 * the two strings) are defined as a "UNIT". */
1459 #define UNIT (1 << 16)
1461 uint32 fuzzy_distance(const char *s1, int len1, const char *s2, int len2)
1463 uint32 a[MAXPATHLEN], diag, above, left, diag_inc, above_inc, left_inc;
1467 if (!len1 || !len2) {
1472 for (i1 = 0, cost = 0; i1 < len1; i1++)
1474 return (int32)len1 * UNIT + cost;
1477 for (i2 = 0; i2 < len2; i2++)
1478 a[i2] = (i2+1) * UNIT;
1480 for (i1 = 0; i1 < len1; i1++) {
1482 above = (i1+1) * UNIT;
1483 for (i2 = 0; i2 < len2; i2++) {
1485 if ((cost = *((uchar*)s1+i1) - *((uchar*)s2+i2)) != 0) {
1491 diag_inc = diag + cost;
1492 left_inc = left + UNIT + *((uchar*)s1+i1);
1493 above_inc = above + UNIT + *((uchar*)s2+i2);
1494 a[i2] = above = left < above
1495 ? (left_inc < diag_inc ? left_inc : diag_inc)
1496 : (above_inc < diag_inc ? above_inc : diag_inc);
1504 #define BB_SLOT_SIZE (16*1024) /* Desired size in bytes */
1505 #define BB_PER_SLOT_BITS (BB_SLOT_SIZE * 8) /* Number of bits per slot */
1506 #define BB_PER_SLOT_INTS (BB_SLOT_SIZE / 4) /* Number of int32s per slot */
1513 struct bitbag *bitbag_create(int max_ndx)
1515 struct bitbag *bb = new(struct bitbag);
1516 bb->slot_cnt = (max_ndx + BB_PER_SLOT_BITS - 1) / BB_PER_SLOT_BITS;
1518 if (!(bb->bits = (uint32**)calloc(bb->slot_cnt, sizeof (uint32*))))
1519 out_of_memory("bitbag_create");
1524 void bitbag_set_bit(struct bitbag *bb, int ndx)
1526 int slot = ndx / BB_PER_SLOT_BITS;
1527 ndx %= BB_PER_SLOT_BITS;
1529 if (!bb->bits[slot]) {
1530 if (!(bb->bits[slot] = (uint32*)calloc(BB_PER_SLOT_INTS, 4)))
1531 out_of_memory("bitbag_set_bit");
1534 bb->bits[slot][ndx/32] |= 1u << (ndx % 32);
1537 #if 0 /* not needed yet */
1538 void bitbag_clear_bit(struct bitbag *bb, int ndx)
1540 int slot = ndx / BB_PER_SLOT_BITS;
1541 ndx %= BB_PER_SLOT_BITS;
1543 if (!bb->bits[slot])
1546 bb->bits[slot][ndx/32] &= ~(1u << (ndx % 32));
1549 int bitbag_check_bit(struct bitbag *bb, int ndx)
1551 int slot = ndx / BB_PER_SLOT_BITS;
1552 ndx %= BB_PER_SLOT_BITS;
1554 if (!bb->bits[slot])
1557 return bb->bits[slot][ndx/32] & (1u << (ndx % 32)) ? 1 : 0;
1561 /* Call this with -1 to start checking from 0. Returns -1 at the end. */
1562 int bitbag_next_bit(struct bitbag *bb, int after)
1565 int i, ndx = after + 1;
1566 int slot = ndx / BB_PER_SLOT_BITS;
1567 ndx %= BB_PER_SLOT_BITS;
1569 mask = (1u << (ndx % 32)) - 1;
1570 for (i = ndx / 32; slot < bb->slot_cnt; slot++, i = mask = 0) {
1571 if (!bb->bits[slot])
1573 for ( ; i < BB_PER_SLOT_INTS; i++, mask = 0) {
1574 if (!(bits = bb->bits[slot][i] & ~mask))
1576 /* The xor magic figures out the lowest enabled bit in
1577 * bits, and the switch quickly computes log2(bit). */
1578 switch (bits ^ (bits & (bits-1))) {
1579 #define LOG2(n) case 1u << n: return slot*BB_PER_SLOT_BITS + i*32 + n
1580 LOG2(0); LOG2(1); LOG2(2); LOG2(3);
1581 LOG2(4); LOG2(5); LOG2(6); LOG2(7);
1582 LOG2(8); LOG2(9); LOG2(10); LOG2(11);
1583 LOG2(12); LOG2(13); LOG2(14); LOG2(15);
1584 LOG2(16); LOG2(17); LOG2(18); LOG2(19);
1585 LOG2(20); LOG2(21); LOG2(22); LOG2(23);
1586 LOG2(24); LOG2(25); LOG2(26); LOG2(27);
1587 LOG2(28); LOG2(29); LOG2(30); LOG2(31);
1589 return -1; /* impossible... */
1596 void flist_ndx_push(flist_ndx_list *lp, int ndx)
1598 struct flist_ndx_item *item;
1600 if (!(item = new(struct flist_ndx_item)))
1601 out_of_memory("flist_ndx_push");
1605 lp->tail->next = item;
1611 int flist_ndx_pop(flist_ndx_list *lp)
1613 struct flist_ndx_item *next;
1619 ndx = lp->head->ndx;
1620 next = lp->head->next;
1629 void *expand_item_list(item_list *lp, size_t item_size,
1630 const char *desc, int incr)
1632 /* First time through, 0 <= 0, so list is expanded. */
1633 if (lp->malloced <= lp->count) {
1635 size_t new_size = lp->malloced;
1637 new_size += -incr; /* increase slowly */
1638 else if (new_size < (size_t)incr)
1642 if (new_size < lp->malloced)
1643 overflow_exit("expand_item_list");
1644 /* Using _realloc_array() lets us pass the size, not a type. */
1645 new_ptr = _realloc_array(lp->items, item_size, new_size);
1646 if (DEBUG_GTE(FLIST, 3)) {
1647 rprintf(FINFO, "[%s] expand %s to %s bytes, did%s move\n",
1648 who_am_i(), desc, big_num(new_size * item_size),
1649 new_ptr == lp->items ? " not" : "");
1652 out_of_memory("expand_item_list");
1654 lp->items = new_ptr;
1655 lp->malloced = new_size;
1657 return (char*)lp->items + (lp->count++ * item_size);