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git.proxmox.com Git - mirror_lxc.git/blob - src/lxc/file_utils.h
1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #ifndef __LXC_FILE_UTILS_H
4 #define __LXC_FILE_UTILS_H
10 #include <sys/types.h>
17 /* read and write whole files */
18 __hidden
extern int lxc_write_to_file(const char *filename
, const void *buf
, size_t count
,
19 bool add_newline
, mode_t mode
) __access_r(2, 3);
21 __hidden
extern int lxc_readat(int dirfd
, const char *filename
, void *buf
, size_t count
)
24 __hidden
extern int lxc_writeat(int dirfd
, const char *filename
, const void *buf
, size_t count
)
27 __hidden
extern int lxc_write_openat(const char *dir
, const char *filename
, const void *buf
,
28 size_t count
) __access_r(3, 4);
30 __hidden
extern int lxc_read_from_file(const char *filename
, void *buf
, size_t count
)
33 /* send and receive buffers completely */
34 __hidden
extern ssize_t
lxc_write_nointr(int fd
, const void *buf
, size_t count
) __access_r(2, 3);
36 __hidden
extern ssize_t
lxc_pwrite_nointr(int fd
, const void *buf
, size_t count
, off_t offset
)
39 __hidden
extern ssize_t
lxc_send_nointr(int sockfd
, void *buf
, size_t len
, int flags
)
42 __hidden
extern ssize_t
lxc_read_nointr(int fd
, void *buf
, size_t count
) __access_w(2, 3);
44 __hidden
extern ssize_t
lxc_read_nointr_expect(int fd
, void *buf
, size_t count
,
45 const void *expected_buf
) __access_w(2, 3);
47 __hidden
extern ssize_t
lxc_read_file_expect(const char *path
, void *buf
, size_t count
,
48 const void *expected_buf
) __access_w(2, 3);
50 __hidden
extern ssize_t
lxc_recv_nointr(int sockfd
, void *buf
, size_t len
, int flags
)
53 __hidden
extern ssize_t
lxc_recvmsg_nointr_iov(int sockfd
, struct iovec
*iov
, size_t iovlen
,
56 __hidden
extern bool file_exists(const char *f
);
57 __hidden
extern int print_to_file(const char *file
, const char *content
);
58 __hidden
extern int is_dir(const char *path
);
59 __hidden
extern int lxc_count_file_lines(const char *fn
);
60 __hidden
extern int lxc_make_tmpfile(char *template, bool rm
);
62 /* __typeof__ should be safe to use with all compilers. */
63 typedef __typeof__(((struct statfs
*)NULL
)->f_type
) fs_type_magic
;
64 __hidden
extern bool has_fs_type(const char *path
, fs_type_magic magic_val
);
65 __hidden
extern bool fhas_fs_type(int fd
, fs_type_magic magic_val
);
66 __hidden
extern bool is_fs_type(const struct statfs
*fs
, fs_type_magic magic_val
);
67 __hidden
extern FILE *fopen_cloexec(const char *path
, const char *mode
);
68 __hidden
extern ssize_t
lxc_sendfile_nointr(int out_fd
, int in_fd
, off_t
*offset
, size_t count
);
69 __hidden
extern char *file_to_buf(const char *path
, size_t *length
);
70 __hidden
extern int fd_to_buf(int fd
, char **buf
, size_t *length
);
71 __hidden
extern int fd_to_fd(int from
, int to
);
72 __hidden
extern int lxc_open_dirfd(const char *dir
);
73 __hidden
extern FILE *fdopen_cached(int fd
, const char *mode
, void **caller_freed_buffer
);
74 __hidden
extern FILE *fopen_cached(const char *path
, const char *mode
, void **caller_freed_buffer
);
75 __hidden
extern int timens_offset_write(clockid_t clk_id
, int64_t s_offset
, int64_t ns_offset
);
76 __hidden
extern bool exists_dir_at(int dir_fd
, const char *path
);
77 __hidden
extern bool exists_file_at(int dir_fd
, const char *path
);
78 __hidden
extern int open_beneath(int dir_fd
, const char *path
, unsigned int flags
);
80 #endif /* __LXC_FILE_UTILS_H */