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/>.
36 #include <sys/types.h>
39 #include <sys/resource.h>
44 #include <sys/socket.h>
47 # define PID_FMT "%" PRIu32
48 #elif SIZEOF_PID_T == 2
49 # define PID_FMT "%" PRIu16
51 # error Unknown pid_t size
55 # define UID_FMT "%" PRIu32
56 #elif SIZEOF_UID_T == 2
57 # define UID_FMT "%" PRIu16
59 # error Unknown uid_t size
63 # define GID_FMT "%" PRIu32
64 #elif SIZEOF_GID_T == 2
65 # define GID_FMT "%" PRIu16
67 # error Unknown gid_t size
70 #if SIZEOF_TIME_T == 8
71 # define PRI_TIME PRIu64
72 #elif SIZEOF_TIME_T == 4
73 # define PRI_TIME PRIu32
75 # error Unknown time_t size
78 #if SIZEOF_RLIM_T == 8
79 # define RLIM_FMT "%" PRIu64
80 #elif SIZEOF_RLIM_T == 4
81 # define RLIM_FMT "%" PRIu32
83 # error Unknown rlim_t size
88 #include "time-util.h"
90 /* What is interpreted as whitespace? */
91 #define WHITESPACE " \t\n\r"
92 #define NEWLINE "\n\r"
95 #define GLOB_CHARS "*?["
97 /* What characters are special in the shell? */
98 /* must be escaped outside and inside double-quotes */
99 #define SHELL_NEED_ESCAPE "\"\\`$"
100 /* can be escaped or double-quoted */
101 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
103 #define FORMAT_BYTES_MAX 8
105 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
106 #define ANSI_RED_ON "\x1B[31m"
107 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
108 #define ANSI_GREEN_ON "\x1B[32m"
109 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
110 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
111 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
112 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
113 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
115 size_t page_size(void);
116 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
118 #define streq(a,b) (strcmp((a),(b)) == 0)
119 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
120 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
121 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
123 bool streq_ptr(const char *a, const char *b) _pure_;
125 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
127 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
129 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
131 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
133 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
135 #define malloc0(n) (calloc((n), 1))
137 static inline const char* yes_no(bool b) {
138 return b ? "yes" : "no";
141 static inline const char* true_false(bool b) {
142 return b ? "true" : "false";
145 static inline const char* strempty(const char *s) {
149 static inline const char* strnull(const char *s) {
150 return s ? s : "(null)";
153 static inline const char *strna(const char *s) {
154 return s ? s : "n/a";
157 static inline bool isempty(const char *p) {
161 static inline char *startswith(const char *s, const char *prefix) {
165 if (strncmp(s, prefix, l) == 0)
166 return (char*) s + l;
171 static inline char *startswith_no_case(const char *s, const char *prefix) {
175 if (strncasecmp(s, prefix, l) == 0)
176 return (char*) s + l;
181 char *endswith(const char *s, const char *postfix) _pure_;
183 char *first_word(const char *s, const char *word) _pure_;
185 int close_nointr(int fd);
186 int safe_close(int fd);
187 void safe_close_pair(int p[]);
189 void close_many(const int fds[], unsigned n_fd);
191 int parse_size(const char *t, off_t base, off_t *size);
193 int parse_boolean(const char *v) _pure_;
194 int parse_pid(const char *s, pid_t* ret_pid);
195 int parse_uid(const char *s, uid_t* ret_uid);
196 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
198 int safe_atou(const char *s, unsigned *ret_u);
199 int safe_atoi(const char *s, int *ret_i);
201 int safe_atollu(const char *s, unsigned long long *ret_u);
202 int safe_atolli(const char *s, long long int *ret_i);
204 int safe_atod(const char *s, double *ret_d);
206 int safe_atou8(const char *s, uint8_t *ret);
208 #if LONG_MAX == INT_MAX
209 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
210 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
211 return safe_atou(s, (unsigned*) ret_u);
213 static inline int safe_atoli(const char *s, long int *ret_u) {
214 assert_cc(sizeof(long int) == sizeof(int));
215 return safe_atoi(s, (int*) ret_u);
218 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
219 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
220 return safe_atollu(s, (unsigned long long*) ret_u);
222 static inline int safe_atoli(const char *s, long int *ret_u) {
223 assert_cc(sizeof(long int) == sizeof(long long int));
224 return safe_atolli(s, (long long int*) ret_u);
228 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
229 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
230 return safe_atou(s, (unsigned*) ret_u);
233 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
234 assert_cc(sizeof(int32_t) == sizeof(int));
235 return safe_atoi(s, (int*) ret_i);
238 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
239 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
240 return safe_atollu(s, (unsigned long long*) ret_u);
243 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
244 assert_cc(sizeof(int64_t) == sizeof(long long int));
245 return safe_atolli(s, (long long int*) ret_i);
248 int safe_atou16(const char *s, uint16_t *ret);
249 int safe_atoi16(const char *s, int16_t *ret);
251 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
253 #define FOREACH_WORD(word, length, s, state) \
254 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
256 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
257 _FOREACH_WORD(word, length, s, separator, false, state)
259 #define FOREACH_WORD_QUOTED(word, length, s, state) \
260 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
262 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
263 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
265 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
266 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
268 char *strappend(const char *s, const char *suffix);
269 char *strnappend(const char *s, const char *suffix, size_t length);
271 char *replace_env(const char *format, char **env);
272 char **replace_env_argv(char **argv, char **env);
274 int readlinkat_malloc(int fd, const char *p, char **ret);
275 int readlink_malloc(const char *p, char **r);
276 int readlink_value(const char *p, char **ret);
277 int readlink_and_make_absolute(const char *p, char **r);
278 int readlink_and_canonicalize(const char *p, char **r);
280 int reset_all_signal_handlers(void);
281 int reset_signal_mask(void);
283 char *strstrip(char *s);
284 char *delete_chars(char *s, const char *bad);
285 char *truncate_nl(char *s);
287 char *file_in_same_dir(const char *path, const char *filename);
289 int rmdir_parents(const char *path, const char *stop);
291 int get_process_state(pid_t pid);
292 int get_process_comm(pid_t pid, char **name);
293 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
294 int get_process_exe(pid_t pid, char **name);
295 int get_process_uid(pid_t pid, uid_t *uid);
296 int get_process_gid(pid_t pid, gid_t *gid);
297 int get_process_capeff(pid_t pid, char **capeff);
298 int get_process_cwd(pid_t pid, char **cwd);
299 int get_process_root(pid_t pid, char **root);
301 char hexchar(int x) _const_;
302 int unhexchar(char c) _const_;
303 char octchar(int x) _const_;
304 int unoctchar(char c) _const_;
305 char decchar(int x) _const_;
306 int undecchar(char c) _const_;
308 char *cescape(const char *s);
309 char *cunescape(const char *s);
310 char *cunescape_length(const char *s, size_t length);
311 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
313 char *xescape(const char *s, const char *bad);
315 char *ascii_strlower(char *path);
317 bool dirent_is_file(const struct dirent *de) _pure_;
318 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
320 bool ignore_file(const char *filename) _pure_;
322 bool chars_intersect(const char *a, const char *b) _pure_;
324 int make_stdio(int fd);
325 int make_null_stdio(void);
326 int make_console_stdio(void);
328 int dev_urandom(void *p, size_t n);
329 void random_bytes(void *p, size_t n);
330 void initialize_srand(void);
332 static inline uint64_t random_u64(void) {
334 random_bytes(&u, sizeof(u));
338 static inline uint32_t random_u32(void) {
340 random_bytes(&u, sizeof(u));
344 /* For basic lookup tables with strictly enumerated entries */
345 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
346 scope const char *name##_to_string(type i) { \
347 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
349 return name##_table[i]; \
351 scope type name##_from_string(const char *s) { \
355 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
356 if (name##_table[i] && \
357 streq(name##_table[i], s)) \
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)
366 /* For string conversions where numbers are also acceptable */
367 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
368 int name##_to_string_alloc(type i, char **str) { \
371 if (i < 0 || i > max) \
373 if (i < (type) ELEMENTSOF(name##_table)) { \
374 s = strdup(name##_table[i]); \
378 r = asprintf(&s, "%u", i); \
385 type name##_from_string(const char *s) { \
389 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
390 if (name##_table[i] && \
391 streq(name##_table[i], s)) \
393 if (safe_atou(s, &u) >= 0 && u <= max) \
397 struct __useless_struct_to_allow_trailing_semicolon__
399 int fd_nonblock(int fd, bool nonblock);
400 int fd_cloexec(int fd, bool cloexec);
402 int close_all_fds(const int except[], unsigned n_except);
404 bool fstype_is_network(const char *fstype);
408 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
409 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
410 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
412 int reset_terminal_fd(int fd, bool switch_to_text);
413 int reset_terminal(const char *name);
415 int open_terminal(const char *name, int mode);
416 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
417 int release_terminal(void);
419 int flush_fd(int fd);
421 int ignore_signals(int sig, ...);
422 int default_signals(int sig, ...);
423 int sigaction_many(const struct sigaction *sa, ...);
425 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
427 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
428 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
430 bool is_device_path(const char *path);
432 int dir_is_empty(const char *path);
433 char* dirname_malloc(const char *path);
435 void rename_process(const char name[8]);
437 void sigset_add_many(sigset_t *ss, ...);
438 int sigprocmask_many(int how, ...);
440 bool hostname_is_set(void);
442 char* lookup_uid(uid_t uid);
443 char* gethostname_malloc(void);
444 char* getlogname_malloc(void);
445 char* getusername_malloc(void);
447 int getttyname_malloc(int fd, char **r);
448 int getttyname_harder(int fd, char **r);
450 int get_ctty_devnr(pid_t pid, dev_t *d);
451 int get_ctty(pid_t, dev_t *_devnr, char **r);
453 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
454 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
456 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
457 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
458 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
459 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
461 int pipe_eof(int fd);
463 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
465 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
466 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
468 int fd_columns(int fd);
469 unsigned columns(void);
470 int fd_lines(int fd);
471 unsigned lines(void);
472 void columns_lines_cache_reset(int _unused_ signum);
476 static inline const char *ansi_highlight(void) {
477 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
480 static inline const char *ansi_highlight_red(void) {
481 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
484 static inline const char *ansi_highlight_green(void) {
485 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
488 static inline const char *ansi_highlight_yellow(void) {
489 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
492 static inline const char *ansi_highlight_blue(void) {
493 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
496 static inline const char *ansi_highlight_off(void) {
497 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
500 int files_same(const char *filea, const char *fileb);
502 int running_in_chroot(void);
504 char *ellipsize(const char *s, size_t length, unsigned percent);
506 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
508 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
509 int touch(const char *path);
511 char *unquote(const char *s, const char *quotes);
512 char *normalize_env_assignment(const char *s);
514 int wait_for_terminate(pid_t pid, siginfo_t *status);
515 int wait_for_terminate_and_warn(const char *name, pid_t pid);
517 noreturn void freeze(void);
519 bool null_or_empty(struct stat *st) _pure_;
520 int null_or_empty_path(const char *fn);
521 int null_or_empty_fd(int fd);
523 DIR *xopendirat(int dirfd, const char *name, int flags);
525 char *fstab_node_to_udev_node(const char *p);
527 char *resolve_dev_console(char **active);
528 bool tty_is_vc(const char *tty);
529 bool tty_is_vc_resolve(const char *tty);
530 bool tty_is_console(const char *tty) _pure_;
531 int vtnr_from_tty(const char *tty);
532 const char *default_term_for_tty(const char *tty);
534 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
536 int kill_and_sigcont(pid_t pid, int sig);
538 bool nulstr_contains(const char*nulstr, const char *needle);
540 bool plymouth_running(void);
542 bool hostname_is_valid(const char *s) _pure_;
543 char* hostname_cleanup(char *s, bool lowercase);
545 bool machine_name_is_valid(const char *s) _pure_;
547 char* strshorten(char *s, size_t l);
549 int terminal_vhangup_fd(int fd);
550 int terminal_vhangup(const char *name);
552 int vt_disallocate(const char *name);
554 int symlink_atomic(const char *from, const char *to);
555 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
556 int mkfifo_atomic(const char *path, mode_t mode);
558 int fchmod_umask(int fd, mode_t mode);
560 bool display_is_local(const char *display) _pure_;
561 int socket_from_display(const char *display, char **path);
563 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
564 int get_group_creds(const char **groupname, gid_t *gid);
566 int in_gid(gid_t gid);
567 int in_group(const char *name);
569 char* uid_to_name(uid_t uid);
570 char* gid_to_name(gid_t gid);
572 int glob_exists(const char *path);
573 int glob_extend(char ***strv, const char *path);
575 int dirent_ensure_type(DIR *d, struct dirent *de);
577 int get_files_in_directory(const char *path, char ***list);
579 char *strjoin(const char *x, ...) _sentinel_;
581 bool is_main_thread(void);
583 static inline bool _pure_ in_charset(const char *s, const char* charset) {
586 return s[strspn(s, charset)] == '\0';
589 int block_get_whole_disk(dev_t d, dev_t *ret);
591 #define NULSTR_FOREACH(i, l) \
592 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
594 #define NULSTR_FOREACH_PAIR(i, j, l) \
595 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
597 int ioprio_class_to_string_alloc(int i, char **s);
598 int ioprio_class_from_string(const char *s);
600 const char *sigchld_code_to_string(int i) _const_;
601 int sigchld_code_from_string(const char *s) _pure_;
603 int log_facility_unshifted_to_string_alloc(int i, char **s);
604 int log_facility_unshifted_from_string(const char *s);
606 int log_level_to_string_alloc(int i, char **s);
607 int log_level_from_string(const char *s);
609 int sched_policy_to_string_alloc(int i, char **s);
610 int sched_policy_from_string(const char *s);
612 const char *rlimit_to_string(int i) _const_;
613 int rlimit_from_string(const char *s) _pure_;
615 int ip_tos_to_string_alloc(int i, char **s);
616 int ip_tos_from_string(const char *s);
618 const char *signal_to_string(int i) _const_;
619 int signal_from_string(const char *s) _pure_;
621 int signal_from_string_try_harder(const char *s);
623 extern int saved_argc;
624 extern char **saved_argv;
626 bool kexec_loaded(void);
628 int prot_from_flags(int flags) _const_;
630 char *format_bytes(char *buf, size_t l, off_t t);
632 int fd_wait_for_event(int fd, int event, usec_t timeout);
634 void* memdup(const void *p, size_t l) _alloc_(2);
636 int is_kernel_thread(pid_t pid);
638 int fd_inc_sndbuf(int fd, size_t n);
639 int fd_inc_rcvbuf(int fd, size_t n);
641 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
643 int setrlimit_closest(int resource, const struct rlimit *rlim);
645 int getenv_for_pid(pid_t pid, const char *field, char **_value);
647 bool is_valid_documentation_url(const char *url) _pure_;
649 bool in_initrd(void);
651 void warn_melody(void);
653 int get_home_dir(char **ret);
654 int get_shell(char **_ret);
656 static inline void freep(void *p) {
660 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
661 static inline void func##p(type *p) { \
665 struct __useless_struct_to_allow_trailing_semicolon__
667 static inline void closep(int *fd) {
671 static inline void umaskp(mode_t *u) {
675 static inline void close_pairp(int (*p)[2]) {
679 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
680 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
681 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
682 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
684 #define _cleanup_free_ _cleanup_(freep)
685 #define _cleanup_close_ _cleanup_(closep)
686 #define _cleanup_umask_ _cleanup_(umaskp)
687 #define _cleanup_globfree_ _cleanup_(globfree)
688 #define _cleanup_fclose_ _cleanup_(fclosep)
689 #define _cleanup_pclose_ _cleanup_(pclosep)
690 #define _cleanup_closedir_ _cleanup_(closedirp)
691 #define _cleanup_endmntent_ _cleanup_(endmntentp)
692 #define _cleanup_close_pair_ _cleanup_(close_pairp)
694 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
695 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
698 return malloc(a * b);
701 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
702 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
705 return realloc(p, a * b);
708 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
709 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
712 return memdup(p, a * b);
715 bool filename_is_safe(const char *p) _pure_;
716 bool path_is_safe(const char *p) _pure_;
717 bool string_is_safe(const char *p) _pure_;
718 bool string_has_cc(const char *p, const char *ok) _pure_;
721 * Check if a string contains any glob patterns.
723 _pure_ static inline bool string_is_glob(const char *p) {
724 return !!strpbrk(p, GLOB_CHARS);
727 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
728 int (*compar) (const void *, const void *, void *),
731 bool is_locale_utf8(void);
733 typedef enum DrawSpecialChar {
738 DRAW_TRIANGULAR_BULLET,
742 _DRAW_SPECIAL_CHAR_MAX
745 const char *draw_special_char(DrawSpecialChar ch);
747 char *strreplace(const char *text, const char *old_string, const char *new_string);
749 char *strip_tab_ansi(char **p, size_t *l);
751 int on_ac_power(void);
753 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
754 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
756 #define FOREACH_LINE(line, f, on_error) \
758 if (!fgets(line, sizeof(line), f)) { \
765 #define FOREACH_DIRENT(de, d, on_error) \
766 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
772 } else if (ignore_file((de)->d_name)) \
776 static inline void *mempset(void *s, int c, size_t n) {
778 return (uint8_t*)s + n;
781 char *hexmem(const void *p, size_t l);
782 void *unhexmem(const char *p, size_t l);
784 char *strextend(char **x, ...) _sentinel_;
785 char *strrep(const char *s, unsigned n);
787 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
788 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
789 #define GREEDY_REALLOC(array, allocated, need) \
790 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
792 #define GREEDY_REALLOC0(array, allocated, need) \
793 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
795 static inline void _reset_errno_(int *saved_errno) {
796 errno = *saved_errno;
799 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
801 static inline int negative_errno(void) {
802 /* This helper should be used to shut up gcc if you know 'errno' is
803 * negative. Instead of "return -errno;", use "return negative_errno();"
804 * It will suppress bogus gcc warnings in case it assumes 'errno' might
805 * be 0 and thus the caller's error-handling might not be triggered. */
806 assert_return(errno > 0, -EINVAL);
810 struct _umask_struct_ {
815 static inline void _reset_umask_(struct _umask_struct_ *s) {
819 #define RUN_WITH_UMASK(mask) \
820 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
821 !_saved_umask_.quit ; \
822 _saved_umask_.quit = true)
824 static inline unsigned u64log2(uint64_t n) {
825 #if __SIZEOF_LONG_LONG__ == 8
826 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
832 static inline unsigned u32ctz(uint32_t n) {
833 #if __SIZEOF_INT__ == 4
834 return __builtin_ctz(n);
840 static inline int log2i(int x) {
843 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
846 static inline unsigned log2u(unsigned x) {
849 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
852 static inline unsigned log2u_round_up(unsigned x) {
858 return log2u(x - 1) + 1;
861 static inline bool logind_running(void) {
862 return access("/run/systemd/seats/", F_OK) >= 0;
865 #define DECIMAL_STR_WIDTH(x) \
867 typeof(x) _x_ = (x); \
874 int unlink_noerrno(const char *path);
880 _new_ = alloca(_len_); \
881 (void *) memset(_new_, 0, _len_); \
884 #define alloca_align(size, align) \
887 size_t _mask_ = (align) - 1; \
888 _ptr_ = alloca((size) + _mask_); \
889 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
892 #define alloca0_align(size, align) \
895 size_t _size_ = (size); \
896 _new_ = alloca_align(_size_, (align)); \
897 (void*)memset(_new_, 0, _size_); \
900 #define strappenda(a, ...) \
902 int _len = strlen(a); \
905 const char *_appendees_[] = { __VA_ARGS__ }; \
906 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
907 _len += strlen(_appendees_[_i]); \
908 _d_ = alloca(_len + 1); \
909 _p_ = stpcpy(_d_, a); \
910 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
911 _p_ = stpcpy(_p_, _appendees_[_i]); \
915 #define procfs_file_alloca(pid, field) \
917 pid_t _pid_ = (pid); \
920 _r_ = ("/proc/self/" field); \
922 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
923 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
928 struct _locale_struct_ {
929 locale_t saved_locale;
934 static inline void _reset_locale_(struct _locale_struct_ *s) {
936 if (s->saved_locale != (locale_t) 0)
937 uselocale(s->saved_locale);
938 if (s->new_locale != (locale_t) 0)
939 freelocale(s->new_locale);
942 #define RUN_WITH_LOCALE(mask, loc) \
943 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
945 if (!_saved_locale_.quit) { \
947 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
948 if (_saved_locale_.new_locale != (locale_t) 0) \
949 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
951 !_saved_locale_.quit; }) ; \
952 _saved_locale_.quit = true)
954 bool id128_is_valid(const char *s) _pure_;
956 int split_pair(const char *s, const char *sep, char **l, char **r);
958 int shall_restore_state(void);
961 * Normal qsort requires base to be nonnull. Here were require
962 * that only if nmemb > 0.
964 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
965 int (*compar)(const void *, const void *)) {
968 qsort(base, nmemb, size, compar);
972 int proc_cmdline(char **ret);
973 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
975 int container_get_leader(const char *machine, pid_t *pid);
977 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
978 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
980 bool pid_is_alive(pid_t pid);
981 bool pid_is_unwaited(pid_t pid);
983 int getpeercred(int fd, struct ucred *ucred);
984 int getpeersec(int fd, char **ret);
986 int writev_safe(int fd, const struct iovec *w, int j);
988 int mkostemp_safe(char *pattern, int flags);
989 int open_tmpfile(const char *path, int flags);
991 int fd_warn_permissions(const char *path, int fd);
993 unsigned long personality_from_string(const char *p);
994 const char *personality_to_string(unsigned long);
996 uint64_t physical_memory(void);
998 char* mount_test_option(const char *haystack, const char *needle);
1000 void hexdump(FILE *f, const void *p, size_t s);
1002 union file_handle_union {
1003 struct file_handle handle;
1004 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
1007 int update_reboot_param_file(const char *param);
1009 int umount_recursive(const char *target, int flags);
1011 int bind_remount_recursive(const char *prefix, bool ro);
1013 int fflush_and_check(FILE *f);
1015 char *tempfn_xxxxxx(const char *p);
1016 char *tempfn_random(const char *p);
1018 bool is_localhost(const char *hostname);
1020 int take_password_lock(const char *root);
1022 int is_symlink(const char *path);
1023 int is_dir(const char *path, bool follow);
1025 int unquote_first_word(const char **p, char **ret, bool relax);
1026 int unquote_many_words(const char **p, ...) _sentinel_;
1028 int free_and_strdup(char **p, const char *s);
1030 int sethostname_idempotent(const char *s);