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/>.
35 #include <sys/types.h>
36 #include <sys/socket.h>
43 #include <sys/inotify.h>
44 #include <sys/statfs.h>
47 # define PID_PRI PRIi32
48 #elif SIZEOF_PID_T == 2
49 # define PID_PRI PRIi16
51 # error Unknown pid_t size
53 #define PID_FMT "%" PID_PRI
56 # define UID_FMT "%" PRIu32
57 #elif SIZEOF_UID_T == 2
58 # define UID_FMT "%" PRIu16
60 # error Unknown uid_t size
64 # define GID_FMT "%" PRIu32
65 #elif SIZEOF_GID_T == 2
66 # define GID_FMT "%" PRIu16
68 # error Unknown gid_t size
71 #if SIZEOF_TIME_T == 8
72 # define PRI_TIME PRIi64
73 #elif SIZEOF_TIME_T == 4
74 # define PRI_TIME PRIu32
76 # error Unknown time_t size
79 #if SIZEOF_RLIM_T == 8
80 # define RLIM_FMT "%" PRIu64
81 #elif SIZEOF_RLIM_T == 4
82 # define RLIM_FMT "%" PRIu32
84 # error Unknown rlim_t size
89 #include "time-util.h"
91 /* What is interpreted as whitespace? */
92 #define WHITESPACE " \t\n\r"
93 #define NEWLINE "\n\r"
96 #define GLOB_CHARS "*?["
98 /* What characters are special in the shell? */
99 /* must be escaped outside and inside double-quotes */
100 #define SHELL_NEED_ESCAPE "\"\\`$"
101 /* can be escaped or double-quoted */
102 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
104 #define FORMAT_BYTES_MAX 8
106 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
107 #define ANSI_RED_ON "\x1B[31m"
108 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
109 #define ANSI_GREEN_ON "\x1B[32m"
110 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
111 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
112 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
113 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
114 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
116 size_t page_size(void) _pure_;
117 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
119 #define streq(a,b) (strcmp((a),(b)) == 0)
120 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
121 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
122 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
124 bool streq_ptr(const char *a, const char *b) _pure_;
126 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
128 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
130 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
132 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
134 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
136 #define malloc0(n) (calloc((n), 1))
138 static inline const char* yes_no(bool b) {
139 return b ? "yes" : "no";
142 static inline const char* true_false(bool b) {
143 return b ? "true" : "false";
146 static inline const char* one_zero(bool b) {
147 return b ? "1" : "0";
150 static inline const char* strempty(const char *s) {
154 static inline const char* strnull(const char *s) {
155 return s ? s : "(null)";
158 static inline const char *strna(const char *s) {
159 return s ? s : "n/a";
162 static inline bool isempty(const char *p) {
166 static inline char *startswith(const char *s, const char *prefix) {
170 if (strncmp(s, prefix, l) == 0)
171 return (char*) s + l;
176 static inline char *startswith_no_case(const char *s, const char *prefix) {
180 if (strncasecmp(s, prefix, l) == 0)
181 return (char*) s + l;
186 char *endswith(const char *s, const char *postfix) _pure_;
187 char *endswith_no_case(const char *s, const char *postfix) _pure_;
189 char *first_word(const char *s, const char *word) _pure_;
191 int close_nointr(int fd);
192 int safe_close(int fd);
193 void safe_close_pair(int p[]);
195 void close_many(const int fds[], unsigned n_fd);
197 int parse_size(const char *t, off_t base, off_t *size);
199 int parse_boolean(const char *v) _pure_;
200 int parse_pid(const char *s, pid_t* ret_pid);
201 int parse_uid(const char *s, uid_t* ret_uid);
202 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
204 int safe_atou(const char *s, unsigned *ret_u);
205 int safe_atoi(const char *s, int *ret_i);
207 int safe_atollu(const char *s, unsigned long long *ret_u);
208 int safe_atolli(const char *s, long long int *ret_i);
210 int safe_atod(const char *s, double *ret_d);
212 int safe_atou8(const char *s, uint8_t *ret);
214 #if LONG_MAX == INT_MAX
215 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
216 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
217 return safe_atou(s, (unsigned*) ret_u);
219 static inline int safe_atoli(const char *s, long int *ret_u) {
220 assert_cc(sizeof(long int) == sizeof(int));
221 return safe_atoi(s, (int*) ret_u);
224 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
225 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
226 return safe_atollu(s, (unsigned long long*) ret_u);
228 static inline int safe_atoli(const char *s, long int *ret_u) {
229 assert_cc(sizeof(long int) == sizeof(long long int));
230 return safe_atolli(s, (long long int*) ret_u);
234 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
235 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
236 return safe_atou(s, (unsigned*) ret_u);
239 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
240 assert_cc(sizeof(int32_t) == sizeof(int));
241 return safe_atoi(s, (int*) ret_i);
244 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
245 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
246 return safe_atollu(s, (unsigned long long*) ret_u);
249 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
250 assert_cc(sizeof(int64_t) == sizeof(long long int));
251 return safe_atolli(s, (long long int*) ret_i);
254 int safe_atou16(const char *s, uint16_t *ret);
255 int safe_atoi16(const char *s, int16_t *ret);
257 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
259 #define FOREACH_WORD(word, length, s, state) \
260 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
262 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
263 _FOREACH_WORD(word, length, s, separator, false, state)
265 #define FOREACH_WORD_QUOTED(word, length, s, state) \
266 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
268 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
269 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
271 char *strappend(const char *s, const char *suffix);
272 char *strnappend(const char *s, const char *suffix, size_t length);
274 char *replace_env(const char *format, char **env);
275 char **replace_env_argv(char **argv, char **env);
277 int readlinkat_malloc(int fd, const char *p, char **ret);
278 int readlink_malloc(const char *p, char **r);
279 int readlink_value(const char *p, char **ret);
280 int readlink_and_make_absolute(const char *p, char **r);
281 int readlink_and_canonicalize(const char *p, char **r);
283 int reset_all_signal_handlers(void);
284 int reset_signal_mask(void);
286 char *strstrip(char *s);
287 char *delete_chars(char *s, const char *bad);
288 char *truncate_nl(char *s);
290 char *file_in_same_dir(const char *path, const char *filename);
292 int rmdir_parents(const char *path, const char *stop);
294 char hexchar(int x) _const_;
295 int unhexchar(char c) _const_;
296 char octchar(int x) _const_;
297 int unoctchar(char c) _const_;
298 char decchar(int x) _const_;
299 int undecchar(char c) _const_;
301 char *cescape(const char *s);
302 size_t cescape_char(char c, char *buf);
304 typedef enum UnescapeFlags {
308 int cunescape(const char *s, UnescapeFlags flags, char **ret);
309 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
310 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
312 char *xescape(const char *s, const char *bad);
314 char *ascii_strlower(char *path);
316 bool dirent_is_file(const struct dirent *de) _pure_;
317 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
319 bool hidden_file(const char *filename) _pure_;
321 bool chars_intersect(const char *a, const char *b) _pure_;
323 int make_stdio(int fd);
324 int make_null_stdio(void);
325 int make_console_stdio(void);
327 int dev_urandom(void *p, size_t n);
328 void random_bytes(void *p, size_t n);
329 void initialize_srand(void);
331 static inline uint64_t random_u64(void) {
333 random_bytes(&u, sizeof(u));
337 static inline uint32_t random_u32(void) {
339 random_bytes(&u, sizeof(u));
343 /* For basic lookup tables with strictly enumerated entries */
344 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
345 scope const char *name##_to_string(type i) { \
346 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
348 return name##_table[i]; \
351 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
353 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
354 scope inline type name##_from_string(const char *s) { \
355 return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
358 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
359 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
360 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
361 struct __useless_struct_to_allow_trailing_semicolon__
363 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
364 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
365 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
366 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
368 /* For string conversions where numbers are also acceptable */
369 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
370 int name##_to_string_alloc(type i, char **str) { \
373 if (i < 0 || i > max) \
375 if (i < (type) ELEMENTSOF(name##_table)) { \
376 s = strdup(name##_table[i]); \
380 r = asprintf(&s, "%i", i); \
387 type name##_from_string(const char *s) { \
391 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
392 if (name##_table[i] && \
393 streq(name##_table[i], s)) \
395 if (safe_atou(s, &u) >= 0 && u <= max) \
399 struct __useless_struct_to_allow_trailing_semicolon__
401 int fd_nonblock(int fd, bool nonblock);
402 int fd_cloexec(int fd, bool cloexec);
404 int close_all_fds(const int except[], unsigned n_except);
406 bool fstype_is_network(const char *fstype);
410 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
411 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
412 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
414 int reset_terminal_fd(int fd, bool switch_to_text);
415 int reset_terminal(const char *name);
417 int open_terminal(const char *name, int mode);
418 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
419 int release_terminal(void);
421 int flush_fd(int fd);
423 int ignore_signals(int sig, ...);
424 int default_signals(int sig, ...);
425 int sigaction_many(const struct sigaction *sa, ...);
427 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
429 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
430 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
431 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
433 bool is_device_path(const char *path);
435 int dir_is_empty(const char *path);
436 char* dirname_malloc(const char *path);
438 void sigset_add_many(sigset_t *ss, ...);
439 int sigprocmask_many(int how, ...);
441 bool hostname_is_set(void);
443 char* lookup_uid(uid_t uid);
444 char* gethostname_malloc(void);
445 char* getlogname_malloc(void);
446 char* getusername_malloc(void);
448 int getttyname_malloc(int fd, char **r);
449 int getttyname_harder(int fd, char **r);
451 int get_ctty_devnr(pid_t pid, dev_t *d);
452 int get_ctty(pid_t, dev_t *_devnr, char **r);
454 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
455 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
457 bool is_temporary_fs(const struct statfs *s) _pure_;
458 int fd_is_temporary_fs(int fd);
460 int pipe_eof(int fd);
462 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
464 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
465 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
467 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
469 int fd_columns(int fd);
470 unsigned columns(void);
471 int fd_lines(int fd);
472 unsigned lines(void);
473 void columns_lines_cache_reset(int _unused_ signum);
477 static inline const char *ansi_highlight(void) {
478 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
481 static inline const char *ansi_highlight_red(void) {
482 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
485 static inline const char *ansi_highlight_green(void) {
486 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
489 static inline const char *ansi_highlight_yellow(void) {
490 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
493 static inline const char *ansi_highlight_blue(void) {
494 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
497 static inline const char *ansi_highlight_off(void) {
498 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
501 int files_same(const char *filea, const char *fileb);
503 int running_in_chroot(void);
505 char *ellipsize(const char *s, size_t length, unsigned percent);
507 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
509 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
510 int touch(const char *path);
512 noreturn void freeze(void);
514 bool null_or_empty(struct stat *st) _pure_;
515 int null_or_empty_path(const char *fn);
516 int null_or_empty_fd(int fd);
518 DIR *xopendirat(int dirfd, const char *name, int flags);
520 char *fstab_node_to_udev_node(const char *p);
522 char *resolve_dev_console(char **active);
523 bool tty_is_vc(const char *tty);
524 bool tty_is_vc_resolve(const char *tty);
525 bool tty_is_console(const char *tty) _pure_;
526 int vtnr_from_tty(const char *tty);
527 const char *default_term_for_tty(const char *tty);
529 void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
531 bool nulstr_contains(const char*nulstr, const char *needle);
533 bool plymouth_running(void);
535 bool hostname_is_valid(const char *s) _pure_;
536 char* hostname_cleanup(char *s, bool lowercase);
538 bool machine_name_is_valid(const char *s) _pure_;
540 char* strshorten(char *s, size_t l);
542 int terminal_vhangup_fd(int fd);
543 int terminal_vhangup(const char *name);
545 int vt_disallocate(const char *name);
547 int symlink_atomic(const char *from, const char *to);
548 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
549 int mkfifo_atomic(const char *path, mode_t mode);
551 int fchmod_umask(int fd, mode_t mode);
553 bool display_is_local(const char *display) _pure_;
554 int socket_from_display(const char *display, char **path);
556 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
557 int get_group_creds(const char **groupname, gid_t *gid);
559 int in_gid(gid_t gid);
560 int in_group(const char *name);
562 char* uid_to_name(uid_t uid);
563 char* gid_to_name(gid_t gid);
565 int glob_exists(const char *path);
566 int glob_extend(char ***strv, const char *path);
568 int dirent_ensure_type(DIR *d, struct dirent *de);
570 int get_files_in_directory(const char *path, char ***list);
572 char *strjoin(const char *x, ...) _sentinel_;
574 bool is_main_thread(void);
576 static inline bool _pure_ in_charset(const char *s, const char* charset) {
579 return s[strspn(s, charset)] == '\0';
582 int block_get_whole_disk(dev_t d, dev_t *ret);
584 #define NULSTR_FOREACH(i, l) \
585 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
587 #define NULSTR_FOREACH_PAIR(i, j, l) \
588 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
590 int ioprio_class_to_string_alloc(int i, char **s);
591 int ioprio_class_from_string(const char *s);
593 const char *sigchld_code_to_string(int i) _const_;
594 int sigchld_code_from_string(const char *s) _pure_;
596 int log_facility_unshifted_to_string_alloc(int i, char **s);
597 int log_facility_unshifted_from_string(const char *s);
599 int log_level_to_string_alloc(int i, char **s);
600 int log_level_from_string(const char *s);
602 int sched_policy_to_string_alloc(int i, char **s);
603 int sched_policy_from_string(const char *s);
605 const char *rlimit_to_string(int i) _const_;
606 int rlimit_from_string(const char *s) _pure_;
608 int ip_tos_to_string_alloc(int i, char **s);
609 int ip_tos_from_string(const char *s);
611 const char *signal_to_string(int i) _const_;
612 int signal_from_string(const char *s) _pure_;
614 int signal_from_string_try_harder(const char *s);
616 extern int saved_argc;
617 extern char **saved_argv;
619 bool kexec_loaded(void);
621 int prot_from_flags(int flags) _const_;
623 char *format_bytes(char *buf, size_t l, off_t t);
625 int fd_wait_for_event(int fd, int event, usec_t timeout);
627 void* memdup(const void *p, size_t l) _alloc_(2);
629 int fd_inc_sndbuf(int fd, size_t n);
630 int fd_inc_rcvbuf(int fd, size_t n);
632 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
634 int setrlimit_closest(int resource, const struct rlimit *rlim);
636 bool http_url_is_valid(const char *url) _pure_;
637 bool documentation_url_is_valid(const char *url) _pure_;
639 bool http_etag_is_valid(const char *etag);
641 bool in_initrd(void);
643 void warn_melody(void);
645 int get_home_dir(char **ret);
646 int get_shell(char **_ret);
648 static inline void freep(void *p) {
652 static inline void closep(int *fd) {
656 static inline void umaskp(mode_t *u) {
660 static inline void close_pairp(int (*p)[2]) {
664 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
665 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
666 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
667 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
669 #define _cleanup_free_ _cleanup_(freep)
670 #define _cleanup_close_ _cleanup_(closep)
671 #define _cleanup_umask_ _cleanup_(umaskp)
672 #define _cleanup_globfree_ _cleanup_(globfree)
673 #define _cleanup_fclose_ _cleanup_(fclosep)
674 #define _cleanup_pclose_ _cleanup_(pclosep)
675 #define _cleanup_closedir_ _cleanup_(closedirp)
676 #define _cleanup_endmntent_ _cleanup_(endmntentp)
677 #define _cleanup_close_pair_ _cleanup_(close_pairp)
679 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
680 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
683 return malloc(a * b);
686 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
687 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
690 return realloc(p, a * b);
693 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
694 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
697 return memdup(p, a * b);
700 bool filename_is_valid(const char *p) _pure_;
701 bool path_is_safe(const char *p) _pure_;
702 bool string_is_safe(const char *p) _pure_;
703 bool string_has_cc(const char *p, const char *ok) _pure_;
706 * Check if a string contains any glob patterns.
708 _pure_ static inline bool string_is_glob(const char *p) {
709 return !!strpbrk(p, GLOB_CHARS);
712 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
713 int (*compar) (const void *, const void *, void *),
716 #define _(String) gettext (String)
717 void init_gettext(void);
718 bool is_locale_utf8(void);
720 typedef enum DrawSpecialChar {
725 DRAW_TRIANGULAR_BULLET,
729 _DRAW_SPECIAL_CHAR_MAX
732 const char *draw_special_char(DrawSpecialChar ch);
734 char *strreplace(const char *text, const char *old_string, const char *new_string);
736 char *strip_tab_ansi(char **p, size_t *l);
738 int on_ac_power(void);
740 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
741 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
743 #define FOREACH_LINE(line, f, on_error) \
745 if (!fgets(line, sizeof(line), f)) { \
752 #define FOREACH_DIRENT(de, d, on_error) \
753 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
759 } else if (hidden_file((de)->d_name)) \
763 #define FOREACH_DIRENT_ALL(de, d, on_error) \
764 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
772 static inline void *mempset(void *s, int c, size_t n) {
774 return (uint8_t*)s + n;
777 char *hexmem(const void *p, size_t l);
778 void *unhexmem(const char *p, size_t l);
780 char *strextend(char **x, ...) _sentinel_;
781 char *strrep(const char *s, unsigned n);
783 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
784 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
785 #define GREEDY_REALLOC(array, allocated, need) \
786 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
788 #define GREEDY_REALLOC0(array, allocated, need) \
789 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
791 static inline void _reset_errno_(int *saved_errno) {
792 errno = *saved_errno;
795 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
797 static inline int negative_errno(void) {
798 /* This helper should be used to shut up gcc if you know 'errno' is
799 * negative. Instead of "return -errno;", use "return negative_errno();"
800 * It will suppress bogus gcc warnings in case it assumes 'errno' might
801 * be 0 and thus the caller's error-handling might not be triggered. */
802 assert_return(errno > 0, -EINVAL);
806 struct _umask_struct_ {
811 static inline void _reset_umask_(struct _umask_struct_ *s) {
815 #define RUN_WITH_UMASK(mask) \
816 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
817 !_saved_umask_.quit ; \
818 _saved_umask_.quit = true)
820 static inline unsigned u64log2(uint64_t n) {
821 #if __SIZEOF_LONG_LONG__ == 8
822 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
828 static inline unsigned u32ctz(uint32_t n) {
829 #if __SIZEOF_INT__ == 4
830 return __builtin_ctz(n);
836 static inline unsigned log2i(int x) {
839 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
842 static inline unsigned log2u(unsigned x) {
845 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
848 static inline unsigned log2u_round_up(unsigned x) {
854 return log2u(x - 1) + 1;
857 static inline bool logind_running(void) {
858 return access("/run/systemd/seats/", F_OK) >= 0;
861 #define DECIMAL_STR_WIDTH(x) \
863 typeof(x) _x_ = (x); \
870 int unlink_noerrno(const char *path);
876 _new_ = alloca(_len_); \
877 (void *) memset(_new_, 0, _len_); \
880 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
881 #define alloca_align(size, align) \
884 size_t _mask_ = (align) - 1; \
885 _ptr_ = alloca((size) + _mask_); \
886 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
889 #define alloca0_align(size, align) \
892 size_t _size_ = (size); \
893 _new_ = alloca_align(_size_, (align)); \
894 (void*)memset(_new_, 0, _size_); \
897 #define strjoina(a, ...) \
899 const char *_appendees_[] = { a, __VA_ARGS__ }; \
903 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
904 _len_ += strlen(_appendees_[_i_]); \
905 _p_ = _d_ = alloca(_len_ + 1); \
906 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
907 _p_ = stpcpy(_p_, _appendees_[_i_]); \
912 bool id128_is_valid(const char *s) _pure_;
914 int split_pair(const char *s, const char *sep, char **l, char **r);
916 int shall_restore_state(void);
919 * Normal qsort requires base to be nonnull. Here were require
920 * that only if nmemb > 0.
922 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
923 int (*compar)(const void *, const void *)) {
926 qsort(base, nmemb, size, compar);
930 int proc_cmdline(char **ret);
931 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
932 int get_proc_cmdline_key(const char *parameter, char **value);
934 int container_get_leader(const char *machine, pid_t *pid);
936 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
937 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
939 int getpeercred(int fd, struct ucred *ucred);
940 int getpeersec(int fd, char **ret);
942 int writev_safe(int fd, const struct iovec *w, int j);
944 int mkostemp_safe(char *pattern, int flags);
945 int open_tmpfile(const char *path, int flags);
947 int fd_warn_permissions(const char *path, int fd);
949 unsigned long personality_from_string(const char *p);
950 const char *personality_to_string(unsigned long);
952 uint64_t physical_memory(void);
954 void hexdump(FILE *f, const void *p, size_t s);
956 union file_handle_union {
957 struct file_handle handle;
958 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
960 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
962 int update_reboot_param_file(const char *param);
964 int umount_recursive(const char *target, int flags);
966 int bind_remount_recursive(const char *prefix, bool ro);
968 int fflush_and_check(FILE *f);
970 int tempfn_xxxxxx(const char *p, char **ret);
971 int tempfn_random(const char *p, char **ret);
972 int tempfn_random_child(const char *p, char **ret);
974 bool is_localhost(const char *hostname);
976 int take_password_lock(const char *root);
978 int is_symlink(const char *path);
979 int is_dir(const char *path, bool follow);
981 typedef enum UnquoteFlags {
983 UNQUOTE_CUNESCAPE = 2,
986 int unquote_first_word(const char **p, char **ret, UnquoteFlags flags);
987 int unquote_many_words(const char **p, UnquoteFlags flags, ...) _sentinel_;
989 int free_and_strdup(char **p, const char *s);
991 int sethostname_idempotent(const char *s);
993 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
995 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
996 for ((e) = &buffer.ev; \
997 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
998 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
1000 union inotify_event_buffer {
1001 struct inotify_event ev;
1002 uint8_t raw[INOTIFY_EVENT_MAX];
1005 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
1007 int ptsname_malloc(int fd, char **ret);
1009 int openpt_in_namespace(pid_t pid, int flags);
1011 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
1013 int fd_setcrtime(int fd, usec_t usec);
1014 int fd_getcrtime(int fd, usec_t *usec);
1015 int path_getcrtime(const char *p, usec_t *usec);
1016 int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
1018 int chattr_fd(int fd, unsigned value, unsigned mask);
1019 int chattr_path(const char *p, unsigned value, unsigned mask);
1021 int read_attr_fd(int fd, unsigned *ret);
1022 int read_attr_path(const char *p, unsigned *ret);
1024 typedef struct LockFile {
1030 int make_lock_file(const char *p, int operation, LockFile *ret);
1031 int make_lock_file_for(const char *p, int operation, LockFile *ret);
1032 void release_lock_file(LockFile *f);
1034 #define _cleanup_release_lock_file_ _cleanup_(release_lock_file)
1036 #define LOCK_FILE_INIT { .fd = -1, .path = NULL }
1038 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
1040 ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
1042 void sigkill_wait(pid_t *pid);
1043 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
1045 int syslog_parse_priority(const char **p, int *priority, bool with_facility);
1047 void cmsg_close_all(struct msghdr *mh);
1049 int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
1051 char *shell_maybe_quote(const char *s);
1053 int parse_mode(const char *s, mode_t *ret);