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git.ipfire.org Git - thirdparty/systemd.git/blob - src/basic/fs-util.h
1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010 Lennart Poettering
15 #include <sys/inotify.h>
16 #include <sys/types.h>
19 #include "time-util.h"
22 int unlink_noerrno(const char *path
);
24 int rmdir_parents(const char *path
, const char *stop
);
26 int rename_noreplace(int olddirfd
, const char *oldpath
, int newdirfd
, const char *newpath
);
28 int readlinkat_malloc(int fd
, const char *p
, char **ret
);
29 int readlink_malloc(const char *p
, char **r
);
30 int readlink_value(const char *p
, char **ret
);
31 int readlink_and_make_absolute(const char *p
, char **r
);
33 int chmod_and_chown(const char *path
, mode_t mode
, uid_t uid
, gid_t gid
);
35 int fchmod_umask(int fd
, mode_t mode
);
37 int fd_warn_permissions(const char *path
, int fd
);
39 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
41 int touch_file(const char *path
, bool parents
, usec_t stamp
, uid_t uid
, gid_t gid
, mode_t mode
);
42 int touch(const char *path
);
44 int symlink_idempotent(const char *from
, const char *to
);
46 int symlink_atomic(const char *from
, const char *to
);
47 int mknod_atomic(const char *path
, mode_t mode
, dev_t dev
);
48 int mkfifo_atomic(const char *path
, mode_t mode
);
50 int get_files_in_directory(const char *path
, char ***list
);
52 int tmp_dir(const char **ret
);
53 int var_tmp_dir(const char **ret
);
55 int unlink_or_warn(const char *filename
);
57 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
59 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
60 for ((e) = &buffer.ev; \
61 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
62 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
64 union inotify_event_buffer
{
65 struct inotify_event ev
;
66 uint8_t raw
[INOTIFY_EVENT_MAX
];
69 int inotify_add_watch_fd(int fd
, int what
, uint32_t mask
);
72 CHASE_PREFIX_ROOT
= 1U << 0, /* If set, the specified path will be prefixed by the specified root before beginning the iteration */
73 CHASE_NONEXISTENT
= 1U << 1, /* If set, it's OK if the path doesn't actually exist. */
74 CHASE_NO_AUTOFS
= 1U << 2, /* If set, return -EREMOTE if autofs mount point found */
75 CHASE_SAFE
= 1U << 3, /* If set, return EPERM if we ever traverse from unprivileged to privileged files or directories */
76 CHASE_OPEN
= 1U << 4, /* If set, return an O_PATH object to the final component */
77 CHASE_TRAIL_SLASH
= 1U << 5, /* If set, any trailing slash will be preserved */
80 int chase_symlinks(const char *path_with_prefix
, const char *root
, unsigned flags
, char **ret
);
82 int chase_symlinks_and_open(const char *path
, const char *root
, unsigned chase_flags
, int open_flags
, char **ret_path
);
83 int chase_symlinks_and_opendir(const char *path
, const char *root
, unsigned chase_flags
, char **ret_path
, DIR **ret_dir
);
85 /* Useful for usage with _cleanup_(), removes a directory and frees the pointer */
86 static inline void rmdir_and_free(char *p
) {
91 DEFINE_TRIVIAL_CLEANUP_FUNC(char*, rmdir_and_free
);
93 static inline void unlink_and_free(char *p
) {
94 (void) unlink_noerrno(p
);
97 DEFINE_TRIVIAL_CLEANUP_FUNC(char*, unlink_and_free
);
99 int access_fd(int fd
, int mode
);
101 int unlinkat_deallocate(int fd
, const char *name
, int flags
);
103 int fsync_directory_of_file(int fd
);