1 /* SPDX-License-Identifier: LGPL-2.1+ */
10 #include <sys/types.h>
13 #include "time-util.h"
15 #define LONG_LINE_MAX (1U*1024U*1024U)
18 WRITE_STRING_FILE_CREATE
= 1 << 0,
19 WRITE_STRING_FILE_TRUNCATE
= 1 << 1,
20 WRITE_STRING_FILE_ATOMIC
= 1 << 2,
21 WRITE_STRING_FILE_AVOID_NEWLINE
= 1 << 3,
22 WRITE_STRING_FILE_VERIFY_ON_FAILURE
= 1 << 4,
23 WRITE_STRING_FILE_SYNC
= 1 << 5,
24 WRITE_STRING_FILE_DISABLE_BUFFER
= 1 << 6,
25 WRITE_STRING_FILE_NOFOLLOW
= 1 << 7,
26 WRITE_STRING_FILE_MKDIR_0755
= 1 << 8,
27 WRITE_STRING_FILE_MODE_0600
= 1 << 9,
29 /* And before you wonder, why write_string_file_atomic_label_ts() is a separate function instead of just one
30 more flag here: it's about linking: we don't want to pull -lselinux into all users of write_string_file()
33 } WriteStringFileFlags
;
36 READ_FULL_FILE_SECURE
= 1 << 0, /* erase any buffers we employ internally, after use */
37 READ_FULL_FILE_UNBASE64
= 1 << 1, /* base64 decode what we read */
38 READ_FULL_FILE_UNHEX
= 1 << 2, /* hex decode what we read */
39 READ_FULL_FILE_WARN_WORLD_READABLE
= 1 << 3, /* if regular file, log at LOG_WARNING level if access mode above 0700 */
40 READ_FULL_FILE_CONNECT_SOCKET
= 1 << 4, /* if socket inode, connect to it and read off it */
43 int fopen_unlocked(const char *path
, const char *options
, FILE **ret
);
44 int fdopen_unlocked(int fd
, const char *options
, FILE **ret
);
45 int take_fdopen_unlocked(int *fd
, const char *options
, FILE **ret
);
46 FILE* take_fdopen(int *fd
, const char *options
);
47 DIR* take_fdopendir(int *dfd
);
48 FILE* open_memstream_unlocked(char **ptr
, size_t *sizeloc
);
49 FILE* fmemopen_unlocked(void *buf
, size_t size
, const char *mode
);
51 int write_string_stream_ts(FILE *f
, const char *line
, WriteStringFileFlags flags
, struct timespec
*ts
);
52 static inline int write_string_stream(FILE *f
, const char *line
, WriteStringFileFlags flags
) {
53 return write_string_stream_ts(f
, line
, flags
, NULL
);
55 int write_string_file_ts(const char *fn
, const char *line
, WriteStringFileFlags flags
, struct timespec
*ts
);
56 static inline int write_string_file(const char *fn
, const char *line
, WriteStringFileFlags flags
) {
57 return write_string_file_ts(fn
, line
, flags
, NULL
);
60 int write_string_filef(const char *fn
, WriteStringFileFlags flags
, const char *format
, ...) _printf_(3, 4);
62 int read_one_line_file(const char *filename
, char **line
);
63 int read_full_file_full(int dir_fd
, const char *filename
, ReadFullFileFlags flags
, char **contents
, size_t *size
);
64 static inline int read_full_file(const char *filename
, char **contents
, size_t *size
) {
65 return read_full_file_full(AT_FDCWD
, filename
, 0, contents
, size
);
67 int read_full_virtual_file(const char *filename
, char **ret_contents
, size_t *ret_size
);
68 int read_full_stream_full(FILE *f
, const char *filename
, ReadFullFileFlags flags
, char **contents
, size_t *size
);
69 static inline int read_full_stream(FILE *f
, char **contents
, size_t *size
) {
70 return read_full_stream_full(f
, NULL
, 0, contents
, size
);
73 int verify_file(const char *fn
, const char *blob
, bool accept_extra_nl
);
75 int executable_is_script(const char *path
, char **interpreter
);
77 int get_proc_field(const char *filename
, const char *pattern
, const char *terminator
, char **field
);
79 DIR *xopendirat(int dirfd
, const char *name
, int flags
);
80 int xfopenat(int dir_fd
, const char *path
, const char *mode
, int flags
, FILE **ret
);
82 int search_and_fopen(const char *path
, const char *mode
, const char *root
, const char **search
, FILE **_f
);
83 int search_and_fopen_nulstr(const char *path
, const char *mode
, const char *root
, const char *search
, FILE **_f
);
85 int chase_symlinks_and_fopen_unlocked(
89 const char *open_flags
,
93 int fflush_and_check(FILE *f
);
94 int fflush_sync_and_check(FILE *f
);
96 int write_timestamp_file_atomic(const char *fn
, usec_t n
);
97 int read_timestamp_file(const char *fn
, usec_t
*ret
);
99 int fputs_with_space(FILE *f
, const char *s
, const char *separator
, bool *space
);
101 typedef enum ReadLineFlags
{
102 READ_LINE_ONLY_NUL
= 1 << 0,
103 READ_LINE_IS_A_TTY
= 1 << 1,
104 READ_LINE_NOT_A_TTY
= 1 << 2,
107 int read_line_full(FILE *f
, size_t limit
, ReadLineFlags flags
, char **ret
);
109 static inline int read_line(FILE *f
, size_t limit
, char **ret
) {
110 return read_line_full(f
, limit
, 0, ret
);
113 static inline int read_nul_string(FILE *f
, size_t limit
, char **ret
) {
114 return read_line_full(f
, limit
, READ_LINE_ONLY_NUL
, ret
);
117 int safe_fgetc(FILE *f
, char *ret
);
119 int warn_file_is_world_accessible(const char *filename
, struct stat
*st
, const char *unit
, unsigned line
);
121 int sync_rights(int from
, int to
);
123 int rename_and_apply_smack_floor_label(const char *temp_path
, const char *dest_path
);