-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- 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 "util.h"
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/stat.h>
+#include <sys/statfs.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+//#include "btrfs-util.h"
+#include "cgroup-util.h"
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "log.h"
+#include "macro.h"
+#include "mount-util.h"
#include "path-util.h"
-// #include "btrfs-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;
+ struct dirent *de;
int ret = 0, r;
+ struct statfs sfs;
assert(fd >= 0);
if (!(flags & REMOVE_PHYSICAL)) {
- r = fd_is_temporary_fs(fd);
+ r = fstatfs(fd, &sfs);
if (r < 0) {
safe_close(fd);
- return r;
+ return -errno;
}
- if (!r) {
- /* 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 */
+ 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. */
+ _cleanup_free_ char *path = NULL;
+
+ (void) fd_get_path(fd, &path);
+ log_error("Attempted to remove disk file system under \"%s\", and we can't allow that.",
+ strna(path));
- log_error("Attempted to remove disk file system, and we can't allow that.");
safe_close(fd);
return -EPERM;
}
return errno == ENOENT ? 0 : -errno;
}
- for (;;) {
- struct dirent *de;
+ FOREACH_DIRENT_ALL(de, d, return -errno) {
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, ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (de->d_type == DT_UNKNOWN ||
continue;
}
-#if 0
+#if 0 /// elogind does not support BTRFS this directly
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, true);
+
+ r = btrfs_subvol_remove_fd(fd, de->d_name, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
if (r < 0) {
- if (r != -ENOTTY && r != -EINVAL) {
+ if (!IN_SET(r, -ENOTTY, -EINVAL)) {
if (ret == 0)
ret = r;
}
}
}
+ return ret;
}
int rm_rf(const char *path, RemoveFlags flags) {
/* 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.");
+ if (path_equal_or_files_same(path, "/", AT_SYMLINK_NOFOLLOW)) {
+ log_error("Attempted to remove entire root file system (\"%s\"), and we can't allow that.", path);
return -EPERM;
}
-#if 0
- if ((flags & (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) == (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) {
+#if 0 /// elogind does not support BTRFS this directly
+ if (FLAGS_SET(flags, REMOVE_SUBVOLUME | REMOVE_ROOT | REMOVE_PHYSICAL)) {
/* Try to remove as subvolume first */
- r = btrfs_subvol_remove(path, true);
+ r = btrfs_subvol_remove(path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
if (r >= 0)
return r;
- if (r != -ENOTTY && r != -EINVAL && r != -ENOTDIR)
+ if (!IN_SET(r, -ENOTTY, -EINVAL, -ENOTDIR))
return r;
+
/* Not btrfs or not a subvolume */
}
#endif // 0
fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
if (fd < 0) {
-
- if (errno != ENOTDIR && errno != ELOOP)
+ if (!IN_SET(errno, ENOTDIR, ELOOP))
return -errno;
if (!(flags & REMOVE_PHYSICAL)) {
if (statfs(path, &s) < 0)
return -errno;
- if (!is_temporary_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
+ if (is_physical_fs(&s)) {
+ log_error("Attempted to remove files from a disk file system under \"%s\", refusing.", path);
return -EPERM;
}
}
~ianmdlvl / elogind.git / blobdiff