mirror of
https://github.com/RsyncProject/rsync.git
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Make delete_item() public, moving it into delete.c.
This commit is contained in:
Wayne Davison committed
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commit
974e18191c
4 files changed
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-214
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@@ -34,7 +34,7 @@ LIBOBJ=lib/wildmatch.o lib/compat.o lib/snprintf.o lib/mdfour.o lib/md5.o \
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ZLIBOBJ=zlib/deflate.o zlib/inffast.o zlib/inflate.o zlib/inftrees.o \
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zlib/trees.o zlib/zutil.o zlib/adler32.o zlib/compress.o zlib/crc32.o
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OBJS1=flist.o rsync.o generator.o receiver.o cleanup.o sender.o exclude.o \
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util.o main.o checksum.o match.o syscall.o log.o backup.o
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util.o main.o checksum.o match.o syscall.o log.o backup.o delete.o
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OBJS2=options.o io.o compat.o hlink.o token.o uidlist.o socket.o hashtable.o \
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fileio.o batch.o clientname.o chmod.o acls.o xattrs.o
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OBJS3=progress.o pipe.o
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@@ -0,0 +1,226 @@
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/*
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* Deletion routines used in rsync.
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*
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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) 2003-2009 Wayne Davison
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*
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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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*
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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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*
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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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*/
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#include "rsync.h"
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extern int am_root;
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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 uid_t our_uid;
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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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{
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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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}
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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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*/
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static enum delret delete_dir_contents(char *fname, uint16 flags)
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{
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struct file_list *dirlist;
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enum delret ret;
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unsigned remainder;
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void *save_filters;
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int j, dlen;
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char *p;
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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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fname, flags);
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}
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dlen = strlen(fname);
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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 (!dirlist->used)
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goto done;
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if (!(flags & DEL_RECURSE)) {
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ret = DR_NOT_EMPTY;
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goto done;
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}
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p = fname + dlen;
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if (dlen != 1 || *fname != '/')
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*p++ = '/';
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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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| DEL_DIR_IS_EMPTY;
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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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rprintf(FINFO,
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"mount point, %s, pins parent directory\n",
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f_name(fp, NULL));
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}
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ret = DR_NOT_EMPTY;
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continue;
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}
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strlcpy(p, fp->basename, remainder);
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if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
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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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ret = DR_NOT_EMPTY;
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}
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if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
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ret = DR_NOT_EMPTY;
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}
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fname[dlen] = '\0';
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done:
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flist_free(dirlist);
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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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fname);
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}
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return ret;
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}
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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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*
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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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*/
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enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
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{
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enum delret ret;
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char *what;
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int ok;
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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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}
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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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int save_uid_ndx = uid_ndx;
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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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if (!uid_ndx)
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uid_ndx = ++file_extra_cnt;
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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 (!save_uid_ndx) {
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--file_extra_cnt;
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uid_ndx = 0;
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}
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if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
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goto check_ret;
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/* OK: try to delete the directory. */
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}
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if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && stats.deleted_files >= max_delete) {
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skipped_deletes++;
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return DR_AT_LIMIT;
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}
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if (S_ISDIR(mode)) {
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what = "rmdir";
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ok = do_rmdir(fbuf) == 0;
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} else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
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what = "make_backup";
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ok = make_backup(fbuf);
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} else {
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what = "unlink";
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ok = robust_unlink(fbuf) == 0;
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}
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if (ok) {
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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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if (S_ISREG(mode)) {
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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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#ifdef SUPPORT_LINKS
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else if (S_ISLNK(mode))
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stats.deleted_symlinks++;
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#endif
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else if (IS_DEVICE(mode))
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stats.deleted_symlinks++;
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else
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stats.deleted_specials++;
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}
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ret = DR_SUCCESS;
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} else {
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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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fbuf);
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ret = DR_NOT_EMPTY;
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} else if (errno != ENOENT) {
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rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
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what, fbuf);
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ret = DR_FAILURE;
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} else
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ret = DR_SUCCESS;
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}
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check_ret:
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if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
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const char *desc;
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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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}
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rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
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desc, fbuf);
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}
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return ret;
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}
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+1
-213
@@ -89,23 +89,18 @@ extern int unsort_ndx;
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extern int max_delete;
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extern int force_delete;
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extern int one_file_system;
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extern int skipped_deletes;
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extern struct stats stats;
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extern dev_t filesystem_dev;
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extern mode_t orig_umask;
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extern uid_t our_uid;
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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 char *basis_dir[MAX_BASIS_DIRS+1];
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extern struct file_list *cur_flist, *first_flist, *dir_flist;
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extern struct filter_list_struct daemon_filter_list;
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int ignore_perishable = 0;
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int non_perishable_cnt = 0;
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int maybe_ATTRS_REPORT = 0;
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static dev_t dev_zero;
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static int skipped_deletes = 0;
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static int deldelay_size = 0, deldelay_cnt = 0;
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static char *deldelay_buf = NULL;
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static int deldelay_fd = -1;
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@@ -116,223 +111,16 @@ static int need_retouch_dir_times;
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static int need_retouch_dir_perms;
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static const char *solo_file = NULL;
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/* For calling delete_item() and delete_dir_contents(). */
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#define DEL_NO_UID_WRITE (1<<0) /* file/dir has our uid w/o write perm */
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#define DEL_RECURSE (1<<1) /* if dir, delete all contents */
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#define DEL_DIR_IS_EMPTY (1<<2) /* internal delete_FUNCTIONS use only */
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#define DEL_FOR_FILE (1<<3) /* making room for a replacement file */
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#define DEL_FOR_DIR (1<<4) /* making room for a replacement dir */
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#define DEL_FOR_SYMLINK (1<<5) /* making room for a replacement symlink */
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#define DEL_FOR_DEVICE (1<<6) /* making room for a replacement device */
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#define DEL_FOR_SPECIAL (1<<7) /* making room for a replacement special */
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#define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
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enum nonregtype {
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TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
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};
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enum delret {
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DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
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};
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/* Forward declarations. */
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static enum delret delete_dir_contents(char *fname, uint16 flags);
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#ifdef SUPPORT_HARD_LINKS
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static void handle_skipped_hlink(struct file_struct *file, int itemizing,
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enum logcode code, int f_out);
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#endif
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static int is_backup_file(char *fn)
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{
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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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}
|
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|
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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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*
|
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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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*/
|
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static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
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{
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enum delret ret;
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char *what;
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int ok;
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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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}
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if (flags & DEL_NO_UID_WRITE)
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do_chmod(fbuf, mode | S_IWUSR);
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|
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if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
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int save_uid_ndx = uid_ndx;
|
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/* This only happens on the first call to delete_item() since
|
||||
* delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
|
||||
if (!uid_ndx)
|
||||
uid_ndx = ++file_extra_cnt;
|
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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 (!save_uid_ndx) {
|
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--file_extra_cnt;
|
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uid_ndx = 0;
|
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}
|
||||
if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
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goto check_ret;
|
||||
/* 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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skipped_deletes++;
|
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return DR_AT_LIMIT;
|
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}
|
||||
|
||||
if (S_ISDIR(mode)) {
|
||||
what = "rmdir";
|
||||
ok = do_rmdir(fbuf) == 0;
|
||||
} else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
|
||||
what = "make_backup";
|
||||
ok = make_backup(fbuf);
|
||||
} else {
|
||||
what = "unlink";
|
||||
ok = robust_unlink(fbuf) == 0;
|
||||
}
|
||||
|
||||
if (ok) {
|
||||
if (!(flags & DEL_MAKE_ROOM)) {
|
||||
log_delete(fbuf, mode);
|
||||
stats.deleted_files++;
|
||||
if (S_ISREG(mode)) {
|
||||
/* Nothing more to count */
|
||||
} else if (S_ISDIR(mode))
|
||||
stats.deleted_dirs++;
|
||||
#ifdef SUPPORT_LINKS
|
||||
else if (S_ISLNK(mode))
|
||||
stats.deleted_symlinks++;
|
||||
#endif
|
||||
else if (IS_DEVICE(mode))
|
||||
stats.deleted_symlinks++;
|
||||
else
|
||||
stats.deleted_specials++;
|
||||
}
|
||||
ret = DR_SUCCESS;
|
||||
} else {
|
||||
if (S_ISDIR(mode) && errno == ENOTEMPTY) {
|
||||
rprintf(FINFO, "cannot delete non-empty directory: %s\n",
|
||||
fbuf);
|
||||
ret = DR_NOT_EMPTY;
|
||||
} else if (errno != ENOENT) {
|
||||
rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
|
||||
what, fbuf);
|
||||
ret = DR_FAILURE;
|
||||
} else
|
||||
ret = DR_SUCCESS;
|
||||
}
|
||||
|
||||
check_ret:
|
||||
if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
|
||||
const char *desc;
|
||||
switch (flags & DEL_MAKE_ROOM) {
|
||||
case DEL_FOR_FILE: desc = "regular file"; break;
|
||||
case DEL_FOR_DIR: desc = "directory"; break;
|
||||
case DEL_FOR_SYMLINK: desc = "symlink"; break;
|
||||
case DEL_FOR_DEVICE: desc = "device file"; break;
|
||||
case DEL_FOR_SPECIAL: desc = "special file"; break;
|
||||
default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
|
||||
}
|
||||
rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
|
||||
desc, fbuf);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* The directory is about to be deleted: if DEL_RECURSE is given, delete all
|
||||
* its contents, otherwise just checks for content. Returns DR_SUCCESS or
|
||||
* DR_NOT_EMPTY. Note that fname must point to a MAXPATHLEN buffer! (The
|
||||
* buffer is used for recursion, but returned unchanged.)
|
||||
*/
|
||||
static enum delret delete_dir_contents(char *fname, uint16 flags)
|
||||
{
|
||||
struct file_list *dirlist;
|
||||
enum delret ret;
|
||||
unsigned remainder;
|
||||
void *save_filters;
|
||||
int j, dlen;
|
||||
char *p;
|
||||
|
||||
if (DEBUG_GTE(DEL, 3)) {
|
||||
rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
|
||||
fname, flags);
|
||||
}
|
||||
|
||||
dlen = strlen(fname);
|
||||
save_filters = push_local_filters(fname, dlen);
|
||||
|
||||
non_perishable_cnt = 0;
|
||||
dirlist = get_dirlist(fname, dlen, 0);
|
||||
ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
|
||||
|
||||
if (!dirlist->used)
|
||||
goto done;
|
||||
|
||||
if (!(flags & DEL_RECURSE)) {
|
||||
ret = DR_NOT_EMPTY;
|
||||
goto done;
|
||||
}
|
||||
|
||||
p = fname + dlen;
|
||||
if (dlen != 1 || *fname != '/')
|
||||
*p++ = '/';
|
||||
remainder = MAXPATHLEN - (p - fname);
|
||||
|
||||
/* We do our own recursion, so make delete_item() non-recursive. */
|
||||
flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
|
||||
| DEL_DIR_IS_EMPTY;
|
||||
|
||||
for (j = dirlist->used; j--; ) {
|
||||
struct file_struct *fp = dirlist->files[j];
|
||||
|
||||
if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
|
||||
if (DEBUG_GTE(DEL, 1)) {
|
||||
rprintf(FINFO,
|
||||
"mount point, %s, pins parent directory\n",
|
||||
f_name(fp, NULL));
|
||||
}
|
||||
ret = DR_NOT_EMPTY;
|
||||
continue;
|
||||
}
|
||||
|
||||
strlcpy(p, fp->basename, remainder);
|
||||
if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
|
||||
do_chmod(fname, fp->mode | S_IWUSR);
|
||||
/* Save stack by recursing to ourself directly. */
|
||||
if (S_ISDIR(fp->mode)) {
|
||||
if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
|
||||
ret = DR_NOT_EMPTY;
|
||||
}
|
||||
if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
|
||||
ret = DR_NOT_EMPTY;
|
||||
}
|
||||
|
||||
fname[dlen] = '\0';
|
||||
|
||||
done:
|
||||
flist_free(dirlist);
|
||||
pop_local_filters(save_filters);
|
||||
|
||||
if (ret == DR_NOT_EMPTY) {
|
||||
rprintf(FINFO, "cannot delete non-empty directory: %s\n",
|
||||
fname);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int start_delete_delay_temp(void)
|
||||
{
|
||||
char fnametmp[MAXPATHLEN];
|
||||
|
||||
@@ -240,6 +240,22 @@ enum msgcode {
|
||||
#define NDX_FLIST_EOF -2
|
||||
#define NDX_FLIST_OFFSET -101
|
||||
|
||||
/* For calling delete_item() and delete_dir_contents(). */
|
||||
#define DEL_NO_UID_WRITE (1<<0) /* file/dir has our uid w/o write perm */
|
||||
#define DEL_RECURSE (1<<1) /* if dir, delete all contents */
|
||||
#define DEL_DIR_IS_EMPTY (1<<2) /* internal delete_FUNCTIONS use only */
|
||||
#define DEL_FOR_FILE (1<<3) /* making room for a replacement file */
|
||||
#define DEL_FOR_DIR (1<<4) /* making room for a replacement dir */
|
||||
#define DEL_FOR_SYMLINK (1<<5) /* making room for a replacement symlink */
|
||||
#define DEL_FOR_DEVICE (1<<6) /* making room for a replacement device */
|
||||
#define DEL_FOR_SPECIAL (1<<7) /* making room for a replacement special */
|
||||
|
||||
#define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
|
||||
|
||||
enum delret {
|
||||
DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
|
||||
};
|
||||
|
||||
#include "errcode.h"
|
||||
|
||||
#include "config.h"
|
||||
|
||||
Reference in new issue
Block a user