mirror of
https://github.com/morgan9e/systemd
synced 2026-04-15 17:06:39 +09:00
e3b84b105e
This seems to be the only place where rm_rf_children() is called with a possibly used fd, which is then passed through to rm_rf_children_impl(). This also fixes #29606. (Tested on Fedora rawhide with kernel 6.5.6-300.fc39.x86_64.)
60 lines
2.5 KiB
C
60 lines
2.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
#pragma once
|
|
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "alloc-util.h"
|
|
#include "errno-util.h"
|
|
|
|
typedef enum RemoveFlags {
|
|
REMOVE_ONLY_DIRECTORIES = 1 << 0, /* Only remove empty directories, no files */
|
|
REMOVE_ROOT = 1 << 1, /* Remove the specified directory itself too, not just the contents of it */
|
|
REMOVE_PHYSICAL = 1 << 2, /* If not set, only removes files on tmpfs, never physical file systems */
|
|
REMOVE_SUBVOLUME = 1 << 3, /* Drop btrfs subvolumes in the tree too */
|
|
REMOVE_MISSING_OK = 1 << 4, /* If the top-level directory is missing, ignore the ENOENT for it */
|
|
REMOVE_CHMOD = 1 << 5, /* chmod() for write access if we cannot delete or access something */
|
|
REMOVE_CHMOD_RESTORE = 1 << 6, /* Restore the old mode before returning */
|
|
REMOVE_SYNCFS = 1 << 7, /* syncfs() the root of the specified directory after removing everything in it */
|
|
} RemoveFlags;
|
|
|
|
int unlinkat_harder(int dfd, const char *filename, int unlink_flags, RemoveFlags remove_flags);
|
|
int fstatat_harder(int dfd,
|
|
const char *filename,
|
|
struct stat *ret,
|
|
int fstatat_flags,
|
|
RemoveFlags remove_flags);
|
|
|
|
/* Note: directory file descriptors passed to the functions below must be
|
|
* positioned at the beginning. If the fd was already used for reading, rewind it. */
|
|
int rm_rf_children(int fd, RemoveFlags flags, const struct stat *root_dev);
|
|
int rm_rf_child(int fd, const char *name, RemoveFlags flags);
|
|
int rm_rf_at(int dir_fd, const char *path, RemoveFlags flags);
|
|
static inline int rm_rf(const char *path, RemoveFlags flags) {
|
|
return rm_rf_at(AT_FDCWD, path, flags);
|
|
}
|
|
|
|
/* Useful for usage with _cleanup_(), destroys a directory and frees the pointer */
|
|
static inline char *rm_rf_physical_and_free(char *p) {
|
|
PROTECT_ERRNO;
|
|
|
|
if (!p)
|
|
return NULL;
|
|
|
|
(void) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_MISSING_OK|REMOVE_CHMOD);
|
|
return mfree(p);
|
|
}
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(char*, rm_rf_physical_and_free);
|
|
|
|
/* Similar as above, but also has magic btrfs subvolume powers */
|
|
static inline char *rm_rf_subvolume_and_free(char *p) {
|
|
PROTECT_ERRNO;
|
|
|
|
if (!p)
|
|
return NULL;
|
|
|
|
(void) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME|REMOVE_MISSING_OK|REMOVE_CHMOD);
|
|
return mfree(p);
|
|
}
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(char*, rm_rf_subvolume_and_free);
|