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* Deletion routines used in rsync.
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* Copyright (C) 1996-2000 Andrew Tridgell
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* Copyright (C) 1996 Paul Mackerras
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* Copyright (C) 2002 Martin Pool <mbp@samba.org>
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* Copyright (C) 2003-2013 Wayne Davison
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, visit the http://fsf.org website.
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extern int make_backups;
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extern int max_delete;
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extern char *backup_dir;
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extern char *backup_suffix;
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extern int backup_suffix_len;
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extern struct stats stats;
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int ignore_perishable = 0;
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int non_perishable_cnt = 0;
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int skipped_deletes = 0;
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static inline int is_backup_file(char *fn)
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int k = strlen(fn) - backup_suffix_len;
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return k > 0 && strcmp(fn+k, backup_suffix) == 0;
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/* The directory is about to be deleted: if DEL_RECURSE is given, delete all
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* its contents, otherwise just checks for content. Returns DR_SUCCESS or
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* DR_NOT_EMPTY. Note that fname must point to a MAXPATHLEN buffer! (The
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* buffer is used for recursion, but returned unchanged.)
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static enum delret delete_dir_contents(char *fname, uint16 flags)
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struct file_list *dirlist;
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if (DEBUG_GTE(DEL, 3)) {
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rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
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save_filters = push_local_filters(fname, dlen);
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non_perishable_cnt = 0;
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dirlist = get_dirlist(fname, dlen, 0);
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ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
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if (!(flags & DEL_RECURSE)) {
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if (dlen != 1 || *fname != '/')
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remainder = MAXPATHLEN - (p - fname);
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/* We do our own recursion, so make delete_item() non-recursive. */
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flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
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for (j = dirlist->used; j--; ) {
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struct file_struct *fp = dirlist->files[j];
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if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
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if (DEBUG_GTE(DEL, 1)) {
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"mount point, %s, pins parent directory\n",
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strlcpy(p, fp->basename, remainder);
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if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
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do_chmod(fname, fp->mode | S_IWUSR);
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/* Save stack by recursing to ourself directly. */
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if (S_ISDIR(fp->mode)) {
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if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
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if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
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pop_local_filters(save_filters);
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if (ret == DR_NOT_EMPTY) {
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rprintf(FINFO, "cannot delete non-empty directory: %s\n",
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/* Delete a file or directory. If DEL_RECURSE is set in the flags, this will
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* delete recursively.
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* Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
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* a directory! (The buffer is used for recursion, but returned unchanged.)
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enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
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if (DEBUG_GTE(DEL, 2)) {
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rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
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fbuf, (int)mode, (int)flags);
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if (flags & DEL_NO_UID_WRITE)
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do_chmod(fbuf, mode | S_IWUSR);
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if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
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/* This only happens on the first call to delete_item() since
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* delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
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ignore_perishable = 1;
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/* If DEL_RECURSE is not set, this just reports emptiness. */
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ret = delete_dir_contents(fbuf, flags);
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ignore_perishable = 0;
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if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
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/* OK: try to delete the directory. */
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if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && stats.deleted_files >= max_delete) {
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ok = do_rmdir(fbuf) == 0;
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if (make_backups > 0 && !(flags & DEL_FOR_BACKUP) && (backup_dir || !is_backup_file(fbuf))) {
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what = "make_backup";
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ok = make_backup(fbuf, True);
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ok = robust_unlink(fbuf) == 0;
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ok = robust_unlink(fbuf) == 0;
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if (!(flags & DEL_MAKE_ROOM)) {
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log_delete(fbuf, mode);
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stats.deleted_files++;
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/* Nothing more to count */
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} else if (S_ISDIR(mode))
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stats.deleted_dirs++;
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else if (S_ISLNK(mode))
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stats.deleted_symlinks++;
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else if (IS_DEVICE(mode))
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stats.deleted_symlinks++;
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stats.deleted_specials++;
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if (S_ISDIR(mode) && errno == ENOTEMPTY) {
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rprintf(FINFO, "cannot delete non-empty directory: %s\n",
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} else if (errno != ENOENT) {
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rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
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if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
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switch (flags & DEL_MAKE_ROOM) {
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case DEL_FOR_FILE: desc = "regular file"; break;
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case DEL_FOR_DIR: desc = "directory"; break;
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case DEL_FOR_SYMLINK: desc = "symlink"; break;
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case DEL_FOR_DEVICE: desc = "device file"; break;
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case DEL_FOR_SPECIAL: desc = "special file"; break;
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default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
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rprintf(FERROR_XFER, "could not make way for %s %s: %s\n",
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flags & DEL_FOR_BACKUP ? "backup" : "new",
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uint16 get_del_for_flag(uint16 mode)
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return DEL_FOR_SYMLINK;
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return DEL_FOR_DEVICE;
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if (IS_SPECIAL(mode))
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return DEL_FOR_SPECIAL;
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exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */