1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
34 #include <sys/types.h>
35 #include <sys/socket.h>
42 #include <sys/inotify.h>
43 #include <sys/statfs.h>
47 #include "time-util.h"
48 #include "formats-util.h"
50 /* What is interpreted as whitespace? */
51 #define WHITESPACE " \t\n\r"
52 #define NEWLINE "\n\r"
55 #define GLOB_CHARS "*?["
57 /* What characters are special in the shell? */
58 /* must be escaped outside and inside double-quotes */
59 #define SHELL_NEED_ESCAPE "\"\\`$"
60 /* can be escaped or double-quoted */
61 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
63 #define FORMAT_BYTES_MAX 8
65 size_t page_size(void) _pure_
;
66 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
68 #define streq(a,b) (strcmp((a),(b)) == 0)
69 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
70 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
71 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
73 bool streq_ptr(const char *a
, const char *b
) _pure_
;
74 int strcmp_ptr(const char *a
, const char *b
) _pure_
;
76 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
78 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
80 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
82 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
84 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
86 #define malloc0(n) (calloc(1, (n)))
88 static inline void *mfree(void *memory
) {
93 static inline const char* yes_no(bool b
) {
94 return b
? "yes" : "no";
97 static inline const char* true_false(bool b
) {
98 return b
? "true" : "false";
101 static inline const char* one_zero(bool b
) {
102 return b
? "1" : "0";
105 static inline const char* strempty(const char *s
) {
109 static inline const char* strnull(const char *s
) {
110 return s
? s
: "(null)";
113 static inline const char *strna(const char *s
) {
114 return s
? s
: "n/a";
117 static inline bool isempty(const char *p
) {
121 static inline char *startswith(const char *s
, const char *prefix
) {
125 if (strncmp(s
, prefix
, l
) == 0)
126 return (char*) s
+ l
;
131 static inline char *startswith_no_case(const char *s
, const char *prefix
) {
135 if (strncasecmp(s
, prefix
, l
) == 0)
136 return (char*) s
+ l
;
141 char *endswith(const char *s
, const char *postfix
) _pure_
;
142 char *endswith_no_case(const char *s
, const char *postfix
) _pure_
;
144 char *first_word(const char *s
, const char *word
) _pure_
;
146 int close_nointr(int fd
);
147 int safe_close(int fd
);
148 void safe_close_pair(int p
[]);
150 void close_many(const int fds
[], unsigned n_fd
);
152 int fclose_nointr(FILE *f
);
153 FILE* safe_fclose(FILE *f
);
155 int parse_size(const char *t
, uint64_t base
, uint64_t *size
);
157 int parse_boolean(const char *v
) _pure_
;
158 int parse_pid(const char *s
, pid_t
* ret_pid
);
159 int parse_uid(const char *s
, uid_t
* ret_uid
);
160 #define parse_gid(s, ret_gid) parse_uid(s, ret_gid)
162 bool uid_is_valid(uid_t uid
);
163 #define gid_is_valid(gid) uid_is_valid(gid)
165 int safe_atou(const char *s
, unsigned *ret_u
);
166 int safe_atoi(const char *s
, int *ret_i
);
168 int safe_atollu(const char *s
, unsigned long long *ret_u
);
169 int safe_atolli(const char *s
, long long int *ret_i
);
171 int safe_atod(const char *s
, double *ret_d
);
173 int safe_atou8(const char *s
, uint8_t *ret
);
175 #if LONG_MAX == INT_MAX
176 static inline int safe_atolu(const char *s
, unsigned long *ret_u
) {
177 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
178 return safe_atou(s
, (unsigned*) ret_u
);
180 static inline int safe_atoli(const char *s
, long int *ret_u
) {
181 assert_cc(sizeof(long int) == sizeof(int));
182 return safe_atoi(s
, (int*) ret_u
);
185 static inline int safe_atolu(const char *s
, unsigned long *ret_u
) {
186 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
187 return safe_atollu(s
, (unsigned long long*) ret_u
);
189 static inline int safe_atoli(const char *s
, long int *ret_u
) {
190 assert_cc(sizeof(long int) == sizeof(long long int));
191 return safe_atolli(s
, (long long int*) ret_u
);
195 static inline int safe_atou32(const char *s
, uint32_t *ret_u
) {
196 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
197 return safe_atou(s
, (unsigned*) ret_u
);
200 static inline int safe_atoi32(const char *s
, int32_t *ret_i
) {
201 assert_cc(sizeof(int32_t) == sizeof(int));
202 return safe_atoi(s
, (int*) ret_i
);
205 static inline int safe_atou64(const char *s
, uint64_t *ret_u
) {
206 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
207 return safe_atollu(s
, (unsigned long long*) ret_u
);
210 static inline int safe_atoi64(const char *s
, int64_t *ret_i
) {
211 assert_cc(sizeof(int64_t) == sizeof(long long int));
212 return safe_atolli(s
, (long long int*) ret_i
);
215 int safe_atou16(const char *s
, uint16_t *ret
);
216 int safe_atoi16(const char *s
, int16_t *ret
);
218 const char* split(const char **state
, size_t *l
, const char *separator
, bool quoted
);
220 #define FOREACH_WORD(word, length, s, state) \
221 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
223 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
224 _FOREACH_WORD(word, length, s, separator, false, state)
226 #define FOREACH_WORD_QUOTED(word, length, s, state) \
227 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
229 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
230 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
232 char *strappend(const char *s
, const char *suffix
);
233 char *strnappend(const char *s
, const char *suffix
, size_t length
);
235 int readlinkat_malloc(int fd
, const char *p
, char **ret
);
236 int readlink_malloc(const char *p
, char **r
);
237 int readlink_value(const char *p
, char **ret
);
238 int readlink_and_make_absolute(const char *p
, char **r
);
239 int readlink_and_canonicalize(const char *p
, char **r
);
241 char *strstrip(char *s
);
242 char *delete_chars(char *s
, const char *bad
);
243 char *truncate_nl(char *s
);
245 char *file_in_same_dir(const char *path
, const char *filename
);
247 int rmdir_parents(const char *path
, const char *stop
);
249 char hexchar(int x
) _const_
;
250 int unhexchar(char c
) _const_
;
251 char octchar(int x
) _const_
;
252 int unoctchar(char c
) _const_
;
253 char decchar(int x
) _const_
;
254 int undecchar(char c
) _const_
;
255 char base32hexchar(int x
) _const_
;
256 int unbase32hexchar(char c
) _const_
;
257 char base64char(int x
) _const_
;
258 int unbase64char(char c
) _const_
;
260 char *cescape(const char *s
);
261 size_t cescape_char(char c
, char *buf
);
263 typedef enum UnescapeFlags
{
267 int cunescape(const char *s
, UnescapeFlags flags
, char **ret
);
268 int cunescape_length(const char *s
, size_t length
, UnescapeFlags flags
, char **ret
);
269 int cunescape_length_with_prefix(const char *s
, size_t length
, const char *prefix
, UnescapeFlags flags
, char **ret
);
271 char *xescape(const char *s
, const char *bad
);
273 char *ascii_strlower(char *path
);
275 bool dirent_is_file(const struct dirent
*de
) _pure_
;
276 bool dirent_is_file_with_suffix(const struct dirent
*de
, const char *suffix
) _pure_
;
278 bool hidden_file(const char *filename
) _pure_
;
280 bool chars_intersect(const char *a
, const char *b
) _pure_
;
282 /* For basic lookup tables with strictly enumerated entries */
283 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
284 scope const char *name##_to_string(type i) { \
285 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
287 return name##_table[i]; \
290 ssize_t
string_table_lookup(const char * const *table
, size_t len
, const char *key
);
292 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
293 scope inline type name##_from_string(const char *s) { \
294 return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
297 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
298 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
299 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
300 struct __useless_struct_to_allow_trailing_semicolon__
302 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
303 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
304 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
305 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
307 /* For string conversions where numbers are also acceptable */
308 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
309 int name##_to_string_alloc(type i, char **str) { \
312 if (i < 0 || i > max) \
314 if (i < (type) ELEMENTSOF(name##_table)) { \
315 s = strdup(name##_table[i]); \
319 r = asprintf(&s, "%i", i); \
326 type name##_from_string(const char *s) { \
330 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
331 if (name##_table[i] && \
332 streq(name##_table[i], s)) \
334 if (safe_atou(s, &u) >= 0 && u <= max) \
338 struct __useless_struct_to_allow_trailing_semicolon__
340 int fd_nonblock(int fd
, bool nonblock
);
341 int fd_cloexec(int fd
, bool cloexec
);
343 int close_all_fds(const int except
[], unsigned n_except
);
345 bool fstype_is_network(const char *fstype
);
347 int flush_fd(int fd
);
349 int fopen_temporary(const char *path
, FILE **_f
, char **_temp_path
);
351 ssize_t
loop_read(int fd
, void *buf
, size_t nbytes
, bool do_poll
);
352 int loop_read_exact(int fd
, void *buf
, size_t nbytes
, bool do_poll
);
353 int loop_write(int fd
, const void *buf
, size_t nbytes
, bool do_poll
);
355 bool is_device_path(const char *path
);
357 int dir_is_empty(const char *path
);
358 char* dirname_malloc(const char *path
);
360 char* lookup_uid(uid_t uid
);
361 char* getlogname_malloc(void);
362 char* getusername_malloc(void);
364 int chmod_and_chown(const char *path
, mode_t mode
, uid_t uid
, gid_t gid
);
365 int fchmod_and_fchown(int fd
, mode_t mode
, uid_t uid
, gid_t gid
);
367 bool is_temporary_fs(const struct statfs
*s
) _pure_
;
368 int fd_is_temporary_fs(int fd
);
370 int pipe_eof(int fd
);
372 DEFINE_TRIVIAL_CLEANUP_FUNC(cpu_set_t
*, CPU_FREE
);
373 #define _cleanup_cpu_free_ _cleanup_(CPU_FREEp)
375 cpu_set_t
* cpu_set_malloc(unsigned *ncpus
);
377 #define xsprintf(buf, fmt, ...) \
378 assert_message_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf), \
379 "xsprintf: " #buf "[] must be big enough")
381 int files_same(const char *filea
, const char *fileb
);
383 int running_in_chroot(void);
385 char *ellipsize(const char *s
, size_t length
, unsigned percent
);
387 char *ellipsize_mem(const char *s
, size_t old_length
, size_t new_length
, unsigned percent
);
389 int touch_file(const char *path
, bool parents
, usec_t stamp
, uid_t uid
, gid_t gid
, mode_t mode
);
390 int touch(const char *path
);
392 noreturn
void freeze(void);
394 bool null_or_empty(struct stat
*st
) _pure_
;
395 int null_or_empty_path(const char *fn
);
396 int null_or_empty_fd(int fd
);
398 DIR *xopendirat(int dirfd
, const char *name
, int flags
);
400 char *fstab_node_to_udev_node(const char *p
);
402 void execute_directories(const char* const* directories
, usec_t timeout
, char *argv
[]);
404 bool nulstr_contains(const char*nulstr
, const char *needle
);
406 bool plymouth_running(void);
408 char* strshorten(char *s
, size_t l
);
410 int symlink_idempotent(const char *from
, const char *to
);
412 int symlink_atomic(const char *from
, const char *to
);
413 int mknod_atomic(const char *path
, mode_t mode
, dev_t dev
);
414 int mkfifo_atomic(const char *path
, mode_t mode
);
416 int fchmod_umask(int fd
, mode_t mode
);
418 bool display_is_local(const char *display
) _pure_
;
419 int socket_from_display(const char *display
, char **path
);
421 int get_user_creds(const char **username
, uid_t
*uid
, gid_t
*gid
, const char **home
, const char **shell
);
422 int get_group_creds(const char **groupname
, gid_t
*gid
);
424 int in_gid(gid_t gid
);
425 int in_group(const char *name
);
427 char* uid_to_name(uid_t uid
);
428 char* gid_to_name(gid_t gid
);
430 int glob_exists(const char *path
);
431 int glob_extend(char ***strv
, const char *path
);
433 int dirent_ensure_type(DIR *d
, struct dirent
*de
);
435 int get_files_in_directory(const char *path
, char ***list
);
437 char *strjoin(const char *x
, ...) _sentinel_
;
439 bool is_main_thread(void);
441 static inline bool _pure_
in_charset(const char *s
, const char* charset
) {
444 return s
[strspn(s
, charset
)] == '\0';
447 int block_get_whole_disk(dev_t d
, dev_t
*ret
);
449 #define NULSTR_FOREACH(i, l) \
450 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
452 #define NULSTR_FOREACH_PAIR(i, j, l) \
453 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
455 int ioprio_class_to_string_alloc(int i
, char **s
);
456 int ioprio_class_from_string(const char *s
);
458 const char *sigchld_code_to_string(int i
) _const_
;
459 int sigchld_code_from_string(const char *s
) _pure_
;
461 int log_facility_unshifted_to_string_alloc(int i
, char **s
);
462 int log_facility_unshifted_from_string(const char *s
);
464 int log_level_to_string_alloc(int i
, char **s
);
465 int log_level_from_string(const char *s
);
467 int sched_policy_to_string_alloc(int i
, char **s
);
468 int sched_policy_from_string(const char *s
);
470 const char *rlimit_to_string(int i
) _const_
;
471 int rlimit_from_string(const char *s
) _pure_
;
473 int ip_tos_to_string_alloc(int i
, char **s
);
474 int ip_tos_from_string(const char *s
);
476 extern int saved_argc
;
477 extern char **saved_argv
;
479 bool kexec_loaded(void);
481 int prot_from_flags(int flags
) _const_
;
483 char *format_bytes(char *buf
, size_t l
, uint64_t t
);
485 int fd_wait_for_event(int fd
, int event
, usec_t timeout
);
487 void* memdup(const void *p
, size_t l
) _alloc_(2);
489 int fd_inc_sndbuf(int fd
, size_t n
);
490 int fd_inc_rcvbuf(int fd
, size_t n
);
492 int fork_agent(pid_t
*pid
, const int except
[], unsigned n_except
, const char *path
, ...);
494 int setrlimit_closest(int resource
, const struct rlimit
*rlim
);
496 bool http_url_is_valid(const char *url
) _pure_
;
497 bool documentation_url_is_valid(const char *url
) _pure_
;
499 bool http_etag_is_valid(const char *etag
);
501 bool in_initrd(void);
503 int get_home_dir(char **ret
);
504 int get_shell(char **_ret
);
506 static inline void freep(void *p
) {
510 static inline void closep(int *fd
) {
514 static inline void umaskp(mode_t
*u
) {
518 static inline void close_pairp(int (*p
)[2]) {
522 static inline void fclosep(FILE **f
) {
526 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose
);
527 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir
);
528 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent
);
530 #define _cleanup_free_ _cleanup_(freep)
531 #define _cleanup_close_ _cleanup_(closep)
532 #define _cleanup_umask_ _cleanup_(umaskp)
533 #define _cleanup_globfree_ _cleanup_(globfree)
534 #define _cleanup_fclose_ _cleanup_(fclosep)
535 #define _cleanup_pclose_ _cleanup_(pclosep)
536 #define _cleanup_closedir_ _cleanup_(closedirp)
537 #define _cleanup_endmntent_ _cleanup_(endmntentp)
538 #define _cleanup_close_pair_ _cleanup_(close_pairp)
540 _malloc_
_alloc_(1, 2) static inline void *malloc_multiply(size_t a
, size_t b
) {
541 if (_unlikely_(b
!= 0 && a
> ((size_t) -1) / b
))
544 return malloc(a
* b
);
547 _alloc_(2, 3) static inline void *realloc_multiply(void *p
, size_t a
, size_t b
) {
548 if (_unlikely_(b
!= 0 && a
> ((size_t) -1) / b
))
551 return realloc(p
, a
* b
);
554 _alloc_(2, 3) static inline void *memdup_multiply(const void *p
, size_t a
, size_t b
) {
555 if (_unlikely_(b
!= 0 && a
> ((size_t) -1) / b
))
558 return memdup(p
, a
* b
);
561 bool filename_is_valid(const char *p
) _pure_
;
562 bool path_is_safe(const char *p
) _pure_
;
563 bool string_is_safe(const char *p
) _pure_
;
564 bool string_has_cc(const char *p
, const char *ok
) _pure_
;
567 * Check if a string contains any glob patterns.
569 _pure_
static inline bool string_is_glob(const char *p
) {
570 return !!strpbrk(p
, GLOB_CHARS
);
573 void *xbsearch_r(const void *key
, const void *base
, size_t nmemb
, size_t size
,
574 int (*compar
) (const void *, const void *, void *),
577 #define _(String) gettext (String)
578 #define N_(String) String
579 void init_gettext(void);
580 bool is_locale_utf8(void);
582 typedef enum DrawSpecialChar
{
587 DRAW_TRIANGULAR_BULLET
,
591 _DRAW_SPECIAL_CHAR_MAX
594 const char *draw_special_char(DrawSpecialChar ch
);
596 char *strreplace(const char *text
, const char *old_string
, const char *new_string
);
598 char *strip_tab_ansi(char **p
, size_t *l
);
600 int on_ac_power(void);
602 int search_and_fopen(const char *path
, const char *mode
, const char *root
, const char **search
, FILE **_f
);
603 int search_and_fopen_nulstr(const char *path
, const char *mode
, const char *root
, const char *search
, FILE **_f
);
605 #define FOREACH_LINE(line, f, on_error) \
607 if (!fgets(line, sizeof(line), f)) { \
614 #define FOREACH_DIRENT(de, d, on_error) \
615 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
621 } else if (hidden_file((de)->d_name)) \
625 #define FOREACH_DIRENT_ALL(de, d, on_error) \
626 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
634 static inline void *mempset(void *s
, int c
, size_t n
) {
636 return (uint8_t*)s
+ n
;
639 char *hexmem(const void *p
, size_t l
);
640 int unhexmem(const char *p
, size_t l
, void **mem
, size_t *len
);
642 char *base32hexmem(const void *p
, size_t l
, bool padding
);
643 int unbase32hexmem(const char *p
, size_t l
, bool padding
, void **mem
, size_t *len
);
645 char *base64mem(const void *p
, size_t l
);
646 int unbase64mem(const char *p
, size_t l
, void **mem
, size_t *len
);
648 char *strextend(char **x
, ...) _sentinel_
;
649 char *strrep(const char *s
, unsigned n
);
651 void* greedy_realloc(void **p
, size_t *allocated
, size_t need
, size_t size
);
652 void* greedy_realloc0(void **p
, size_t *allocated
, size_t need
, size_t size
);
653 #define GREEDY_REALLOC(array, allocated, need) \
654 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
656 #define GREEDY_REALLOC0(array, allocated, need) \
657 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
659 static inline void _reset_errno_(int *saved_errno
) {
660 errno
= *saved_errno
;
663 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
665 static inline int negative_errno(void) {
666 /* This helper should be used to shut up gcc if you know 'errno' is
667 * negative. Instead of "return -errno;", use "return negative_errno();"
668 * It will suppress bogus gcc warnings in case it assumes 'errno' might
669 * be 0 and thus the caller's error-handling might not be triggered. */
670 assert_return(errno
> 0, -EINVAL
);
674 struct _umask_struct_
{
679 static inline void _reset_umask_(struct _umask_struct_
*s
) {
683 #define RUN_WITH_UMASK(mask) \
684 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
685 !_saved_umask_.quit ; \
686 _saved_umask_.quit = true)
688 static inline unsigned u64log2(uint64_t n
) {
689 #if __SIZEOF_LONG_LONG__ == 8
690 return (n
> 1) ? (unsigned) __builtin_clzll(n
) ^ 63U : 0;
696 static inline unsigned u32ctz(uint32_t n
) {
697 #if __SIZEOF_INT__ == 4
698 return __builtin_ctz(n
);
704 static inline unsigned log2i(int x
) {
707 return __SIZEOF_INT__
* 8 - __builtin_clz(x
) - 1;
710 static inline unsigned log2u(unsigned x
) {
713 return sizeof(unsigned) * 8 - __builtin_clz(x
) - 1;
716 static inline unsigned log2u_round_up(unsigned x
) {
722 return log2u(x
- 1) + 1;
725 static inline bool logind_running(void) {
726 return access("/run/systemd/seats/", F_OK
) >= 0;
729 #define DECIMAL_STR_WIDTH(x) \
731 typeof(x) _x_ = (x); \
738 int unlink_noerrno(const char *path
);
744 _new_ = alloca(_len_); \
745 (void *) memset(_new_, 0, _len_); \
748 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
749 #define alloca_align(size, align) \
752 size_t _mask_ = (align) - 1; \
753 _ptr_ = alloca((size) + _mask_); \
754 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
757 #define alloca0_align(size, align) \
760 size_t _size_ = (size); \
761 _new_ = alloca_align(_size_, (align)); \
762 (void*)memset(_new_, 0, _size_); \
765 #define strjoina(a, ...) \
767 const char *_appendees_[] = { a, __VA_ARGS__ }; \
771 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
772 _len_ += strlen(_appendees_[_i_]); \
773 _p_ = _d_ = alloca(_len_ + 1); \
774 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
775 _p_ = stpcpy(_p_, _appendees_[_i_]); \
780 bool id128_is_valid(const char *s
) _pure_
;
782 int split_pair(const char *s
, const char *sep
, char **l
, char **r
);
784 int shall_restore_state(void);
787 * Normal qsort requires base to be nonnull. Here were require
788 * that only if nmemb > 0.
790 static inline void qsort_safe(void *base
, size_t nmemb
, size_t size
, comparison_fn_t compar
) {
795 qsort(base
, nmemb
, size
, compar
);
798 /* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
799 static inline void *memmem_safe(const void *haystack
, size_t haystacklen
, const void *needle
, size_t needlelen
) {
802 return (void*) haystack
;
804 if (haystacklen
< needlelen
)
810 return memmem(haystack
, haystacklen
, needle
, needlelen
);
813 int proc_cmdline(char **ret
);
814 int parse_proc_cmdline(int (*parse_word
)(const char *key
, const char *value
));
815 int get_proc_cmdline_key(const char *parameter
, char **value
);
817 int container_get_leader(const char *machine
, pid_t
*pid
);
819 int namespace_open(pid_t pid
, int *pidns_fd
, int *mntns_fd
, int *netns_fd
, int *userns_fd
, int *root_fd
);
820 int namespace_enter(int pidns_fd
, int mntns_fd
, int netns_fd
, int userns_fd
, int root_fd
);
822 int getpeercred(int fd
, struct ucred
*ucred
);
823 int getpeersec(int fd
, char **ret
);
825 int writev_safe(int fd
, const struct iovec
*w
, int j
);
827 int mkostemp_safe(char *pattern
, int flags
);
828 int open_tmpfile(const char *path
, int flags
);
830 int fd_warn_permissions(const char *path
, int fd
);
832 #ifndef PERSONALITY_INVALID
833 /* personality(7) documents that 0xffffffffUL is used for querying the
834 * current personality, hence let's use that here as error
836 #define PERSONALITY_INVALID 0xffffffffLU
839 unsigned long personality_from_string(const char *p
);
840 const char *personality_to_string(unsigned long);
842 uint64_t physical_memory(void);
844 void hexdump(FILE *f
, const void *p
, size_t s
);
846 union file_handle_union
{
847 struct file_handle handle
;
848 char padding
[sizeof(struct file_handle
) + MAX_HANDLE_SZ
];
850 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
852 int update_reboot_param_file(const char *param
);
854 int umount_recursive(const char *target
, int flags
);
856 int bind_remount_recursive(const char *prefix
, bool ro
);
858 int fflush_and_check(FILE *f
);
860 int tempfn_xxxxxx(const char *p
, const char *extra
, char **ret
);
861 int tempfn_random(const char *p
, const char *extra
, char **ret
);
862 int tempfn_random_child(const char *p
, const char *extra
, char **ret
);
864 int take_password_lock(const char *root
);
866 int is_symlink(const char *path
);
867 int is_dir(const char *path
, bool follow
);
868 int is_device_node(const char *path
);
870 typedef enum ExtractFlags
{
872 EXTRACT_CUNESCAPE
= 2,
873 EXTRACT_CUNESCAPE_RELAX
= 4,
875 EXTRACT_DONT_COALESCE_SEPARATORS
= 16,
878 int extract_first_word(const char **p
, char **ret
, const char *separators
, ExtractFlags flags
);
879 int extract_first_word_and_warn(const char **p
, char **ret
, const char *separators
, ExtractFlags flags
, const char *unit
, const char *filename
, unsigned line
, const char *rvalue
);
880 int extract_many_words(const char **p
, const char *separators
, ExtractFlags flags
, ...) _sentinel_
;
882 int free_and_strdup(char **p
, const char *s
);
884 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
886 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
887 for ((e) = &buffer.ev; \
888 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
889 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
891 union inotify_event_buffer
{
892 struct inotify_event ev
;
893 uint8_t raw
[INOTIFY_EVENT_MAX
];
896 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
898 int ptsname_malloc(int fd
, char **ret
);
900 int openpt_in_namespace(pid_t pid
, int flags
);
902 ssize_t
fgetxattrat_fake(int dirfd
, const char *filename
, const char *attribute
, void *value
, size_t size
, int flags
);
904 int fd_setcrtime(int fd
, usec_t usec
);
905 int fd_getcrtime(int fd
, usec_t
*usec
);
906 int path_getcrtime(const char *p
, usec_t
*usec
);
907 int fd_getcrtime_at(int dirfd
, const char *name
, usec_t
*usec
, int flags
);
909 int same_fd(int a
, int b
);
911 int chattr_fd(int fd
, unsigned value
, unsigned mask
);
912 int chattr_path(const char *p
, unsigned value
, unsigned mask
);
914 int read_attr_fd(int fd
, unsigned *ret
);
915 int read_attr_path(const char *p
, unsigned *ret
);
917 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
919 ssize_t
sparse_write(int fd
, const void *p
, size_t sz
, size_t run_length
);
921 void sigkill_wait(pid_t
*pid
);
922 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
924 int syslog_parse_priority(const char **p
, int *priority
, bool with_facility
);
926 void cmsg_close_all(struct msghdr
*mh
);
928 int rename_noreplace(int olddirfd
, const char *oldpath
, int newdirfd
, const char *newpath
);
930 char *shell_escape(const char *s
, const char *bad
);
931 char *shell_maybe_quote(const char *s
);
933 int parse_mode(const char *s
, mode_t
*ret
);
935 int mount_move_root(const char *path
);
937 int reset_uid_gid(void);
939 int getxattr_malloc(const char *path
, const char *name
, char **value
, bool allow_symlink
);
940 int fgetxattr_malloc(int fd
, const char *name
, char **value
);
942 int send_one_fd(int transport_fd
, int fd
);
943 int receive_one_fd(int transport_fd
);