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-rw-r--r--src/basic/rm-rf.c242
1 files changed, 0 insertions, 242 deletions
diff --git a/src/basic/rm-rf.c b/src/basic/rm-rf.c
deleted file mode 100644
index baa70c2c8d..0000000000
--- a/src/basic/rm-rf.c
+++ /dev/null
@@ -1,242 +0,0 @@
-/***
- This file is part of systemd.
-
- Copyright 2015 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <sys/stat.h>
-#include <sys/statfs.h>
-#include <unistd.h>
-
-#include "btrfs-util.h"
-#include "cgroup-util.h"
-#include "fd-util.h"
-#include "log.h"
-#include "macro.h"
-#include "mount-util.h"
-#include "path-util.h"
-#include "rm-rf.h"
-#include "stat-util.h"
-#include "string-util.h"
-
-static bool is_physical_fs(const struct statfs *sfs) {
- return !is_temporary_fs(sfs) && !is_cgroup_fs(sfs);
-}
-
-int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
- _cleanup_closedir_ DIR *d = NULL;
- int ret = 0, r;
- struct statfs sfs;
-
- assert(fd >= 0);
-
- /* This returns the first error we run into, but nevertheless
- * tries to go on. This closes the passed fd. */
-
- if (!(flags & REMOVE_PHYSICAL)) {
-
- r = fstatfs(fd, &sfs);
- if (r < 0) {
- safe_close(fd);
- return -errno;
- }
-
- if (is_physical_fs(&sfs)) {
- /* We refuse to clean physical file systems
- * with this call, unless explicitly
- * requested. This is extra paranoia just to
- * be sure we never ever remove non-state
- * data */
-
- log_error("Attempted to remove disk file system, and we can't allow that.");
- safe_close(fd);
- return -EPERM;
- }
- }
-
- d = fdopendir(fd);
- if (!d) {
- safe_close(fd);
- return errno == ENOENT ? 0 : -errno;
- }
-
- for (;;) {
- struct dirent *de;
- bool is_dir;
- struct stat st;
-
- errno = 0;
- de = readdir(d);
- if (!de) {
- if (errno > 0 && ret == 0)
- ret = -errno;
- return ret;
- }
-
- if (streq(de->d_name, ".") || streq(de->d_name, ".."))
- continue;
-
- if (de->d_type == DT_UNKNOWN ||
- (de->d_type == DT_DIR && (root_dev || (flags & REMOVE_SUBVOLUME)))) {
- if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- is_dir = S_ISDIR(st.st_mode);
- } else
- is_dir = de->d_type == DT_DIR;
-
- if (is_dir) {
- int subdir_fd;
-
- /* if root_dev is set, remove subdirectories only if device is same */
- if (root_dev && st.st_dev != root_dev->st_dev)
- continue;
-
- subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
- if (subdir_fd < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- /* Stop at mount points */
- r = fd_is_mount_point(fd, de->d_name, 0);
- if (r < 0) {
- if (ret == 0 && r != -ENOENT)
- ret = r;
-
- safe_close(subdir_fd);
- continue;
- }
- if (r) {
- safe_close(subdir_fd);
- continue;
- }
-
- if ((flags & REMOVE_SUBVOLUME) && st.st_ino == 256) {
-
- /* This could be a subvolume, try to remove it */
-
- r = btrfs_subvol_remove_fd(fd, de->d_name, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
- if (r < 0) {
- if (r != -ENOTTY && r != -EINVAL) {
- if (ret == 0)
- ret = r;
-
- safe_close(subdir_fd);
- continue;
- }
-
- /* ENOTTY, then it wasn't a
- * btrfs subvolume, continue
- * below. */
- } else {
- /* It was a subvolume, continue. */
- safe_close(subdir_fd);
- continue;
- }
- }
-
- /* We pass REMOVE_PHYSICAL here, to avoid
- * doing the fstatfs() to check the file
- * system type again for each directory */
- r = rm_rf_children(subdir_fd, flags | REMOVE_PHYSICAL, root_dev);
- if (r < 0 && ret == 0)
- ret = r;
-
- if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- }
-
- } else if (!(flags & REMOVE_ONLY_DIRECTORIES)) {
-
- if (unlinkat(fd, de->d_name, 0) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- }
- }
- }
-}
-
-int rm_rf(const char *path, RemoveFlags flags) {
- int fd, r;
- struct statfs s;
-
- assert(path);
-
- /* We refuse to clean the root file system with this
- * call. This is extra paranoia to never cause a really
- * seriously broken system. */
- if (path_equal(path, "/")) {
- log_error("Attempted to remove entire root file system, and we can't allow that.");
- return -EPERM;
- }
-
- if ((flags & (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) == (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) {
- /* Try to remove as subvolume first */
- r = btrfs_subvol_remove(path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
- if (r >= 0)
- return r;
-
- if (r != -ENOTTY && r != -EINVAL && r != -ENOTDIR)
- return r;
-
- /* Not btrfs or not a subvolume */
- }
-
- fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
- if (fd < 0) {
-
- if (errno != ENOTDIR && errno != ELOOP)
- return -errno;
-
- if (!(flags & REMOVE_PHYSICAL)) {
- if (statfs(path, &s) < 0)
- return -errno;
-
- if (is_physical_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
- return -EPERM;
- }
- }
-
- if ((flags & REMOVE_ROOT) && !(flags & REMOVE_ONLY_DIRECTORIES))
- if (unlink(path) < 0 && errno != ENOENT)
- return -errno;
-
- return 0;
- }
-
- r = rm_rf_children(fd, flags, NULL);
-
- if (flags & REMOVE_ROOT) {
- if (rmdir(path) < 0) {
- if (r == 0 && errno != ENOENT)
- r = -errno;
- }
- }
-
- return r;
-}
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