+/* make a complete pathname for backup file */
+char *get_backup_name(const char *fname)
+{
+ if (backup_dir) {
+ if (stringjoin(backup_dir_buf + backup_dir_len, backup_dir_remainder,
+ fname, backup_suffix, NULL) < backup_dir_remainder)
+ return backup_dir_buf;
+ } else {
+ if (stringjoin(backup_dir_buf, MAXPATHLEN,
+ fname, backup_suffix, NULL) < MAXPATHLEN)
+ return backup_dir_buf;
+ }
+
+ rprintf(FERROR, "backup filename too long\n");
+ return NULL;
+}
+
+/****************************************************************************
+Create a directory given an absolute path, perms based upon another directory
+path
+****************************************************************************/
+int make_bak_dir(const char *fullpath)
+{
+ char fbuf[MAXPATHLEN], *rel, *end, *p;
+ struct file_struct *file;
+ int len = backup_dir_len;
+ stat_x sx;
+
+ while (*fullpath == '.' && fullpath[1] == '/') {
+ fullpath += 2;
+ len -= 2;
+ }
+
+ if (strlcpy(fbuf, fullpath, sizeof fbuf) >= sizeof fbuf)
+ return -1;
+
+ rel = fbuf + len;
+ end = p = rel + strlen(rel);
+
+ /* Try to find an existing dir, starting from the deepest dir. */
+ while (1) {
+ if (--p == fbuf)
+ return -1;
+ if (*p == '/') {
+ *p = '\0';
+ if (mkdir_defmode(fbuf) == 0)
+ break;
+ if (errno != ENOENT) {
+ rsyserr(FERROR, errno,
+ "make_bak_dir mkdir %s failed",
+ full_fname(fbuf));
+ return -1;
+ }
+ }
+ }
+
+ /* Make all the dirs that we didn't find on the way here. */
+ while (1) {
+ if (p >= rel) {
+ /* Try to transfer the directory settings of the
+ * actual dir that the files are coming from. */
+ init_stat_x(&sx);
+ if (x_stat(rel, &sx.st, NULL) < 0) {
+ rsyserr(FERROR, errno,
+ "make_bak_dir stat %s failed",
+ full_fname(rel));
+ } else {
+ if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS)))
+ continue;
+#ifdef SUPPORT_ACLS
+ if (preserve_acls && !S_ISLNK(file->mode)) {
+ get_acl(rel, &sx);
+ cache_acl(file, &sx);
+ free_acl(&sx);
+ }
+#endif
+#ifdef SUPPORT_XATTRS
+ if (preserve_xattrs) {
+ get_xattr(rel, &sx);
+ cache_xattr(file, &sx);
+ free_xattr(&sx);
+ }
+#endif
+ set_file_attrs(fbuf, file, NULL, NULL, 0);
+ unmake_file(file);
+ }
+ }
+ *p = '/';
+ p += strlen(p);
+ if (p == end)
+ break;
+ if (mkdir_defmode(fbuf) < 0) {
+ rsyserr(FERROR, errno, "make_bak_dir mkdir %s failed",
+ full_fname(fbuf));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/* Has same return codes as make_backup(). */
+static inline int link_or_rename(const char *from, const char *to,
+ BOOL prefer_rename, STRUCT_STAT *stp)
+{
+ if (S_ISLNK(stp->st_mode)) {
+ if (prefer_rename)
+ goto do_rename;
+#ifndef CAN_HARDLINK_SYMLINK
+ return 0; /* Use copy code. */
+#endif
+ }
+ if (IS_SPECIAL(stp->st_mode) || IS_DEVICE(stp->st_mode)) {
+ if (prefer_rename)
+ goto do_rename;
+#ifndef CAN_HARDLINK_SPECIAL
+ return 0; /* Use copy code. */
+#endif
+ }
+#ifdef SUPPORT_HARD_LINKS
+ if (!S_ISDIR(stp->st_mode)) {
+ if (do_link(from, to) == 0)
+ return 2;
+ return 0;
+ }
+#endif
+ do_rename:
+ if (do_rename(from, to) == 0) {
+ if (stp->st_nlink > 1 && !S_ISDIR(stp->st_mode)) {
+ /* If someone has hard-linked the file into the backup
+ * dir, rename() might return success but do nothing! */
+ robust_unlink(to); /* Just in case... */
+ }
+ return 1;
+ }
+ return 0;
+}