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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/shared/rm-rf.h | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/shared/rm-rf.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/shared/rm-rf.h b/src/shared/rm-rf.h new file mode 100644 index 0000000..f26a1b0 --- /dev/null +++ b/src/shared/rm-rf.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#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(const char *path, RemoveFlags 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); |