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 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
250 #define FOREACH_WORD(word, length, s, state) \
251 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
253 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
254 _FOREACH_WORD(word, length, s, separator, false, state)
256 #define FOREACH_WORD_QUOTED(word, length, s, state) \
257 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
259 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
260 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
262 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
263 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
265 char *strappend(const char *s, const char *suffix);
266 char *strnappend(const char *s, const char *suffix, size_t length);
268 char *replace_env(const char *format, char **env);
269 char **replace_env_argv(char **argv, char **env);
271 int readlinkat_malloc(int fd, const char *p, char **ret);
272 int readlink_malloc(const char *p, char **r);
273 int readlink_and_make_absolute(const char *p, char **r);
274 int readlink_and_canonicalize(const char *p, char **r);
276 int reset_all_signal_handlers(void);
277 int reset_signal_mask(void);
279 char *strstrip(char *s);
280 char *delete_chars(char *s, const char *bad);
281 char *truncate_nl(char *s);
283 char *file_in_same_dir(const char *path, const char *filename);
285 int rmdir_parents(const char *path, const char *stop);
287 int get_process_state(pid_t pid);
288 int get_process_comm(pid_t pid, char **name);
289 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
290 int get_process_exe(pid_t pid, char **name);
291 int get_process_uid(pid_t pid, uid_t *uid);
292 int get_process_gid(pid_t pid, gid_t *gid);
293 int get_process_capeff(pid_t pid, char **capeff);
295 char hexchar(int x) _const_;
296 int unhexchar(char c) _const_;
297 char octchar(int x) _const_;
298 int unoctchar(char c) _const_;
299 char decchar(int x) _const_;
300 int undecchar(char c) _const_;
302 char *cescape(const char *s);
303 char *cunescape(const char *s);
304 char *cunescape_length(const char *s, size_t length);
305 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
307 char *xescape(const char *s, const char *bad);
309 char *ascii_strlower(char *path);
311 bool dirent_is_file(const struct dirent *de) _pure_;
312 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
314 bool ignore_file(const char *filename) _pure_;
316 bool chars_intersect(const char *a, const char *b) _pure_;
318 int make_stdio(int fd);
319 int make_null_stdio(void);
320 int make_console_stdio(void);
322 int dev_urandom(void *p, size_t n);
323 void random_bytes(void *p, size_t n);
325 static inline uint64_t random_u64(void) {
327 random_bytes(&u, sizeof(u));
331 static inline uint32_t random_u32(void) {
333 random_bytes(&u, sizeof(u));
337 /* For basic lookup tables with strictly enumerated entries */
338 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
339 scope const char *name##_to_string(type i) { \
340 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
342 return name##_table[i]; \
344 scope type name##_from_string(const char *s) { \
348 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
349 if (name##_table[i] && \
350 streq(name##_table[i], s)) \
354 struct __useless_struct_to_allow_trailing_semicolon__
356 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
357 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
359 /* For string conversions where numbers are also acceptable */
360 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
361 int name##_to_string_alloc(type i, char **str) { \
364 if (i < 0 || i > max) \
366 if (i < (type) ELEMENTSOF(name##_table)) { \
367 s = strdup(name##_table[i]); \
371 r = asprintf(&s, "%u", i); \
378 type name##_from_string(const char *s) { \
382 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
383 if (name##_table[i] && \
384 streq(name##_table[i], s)) \
386 if (safe_atou(s, &u) >= 0 && u <= max) \
390 struct __useless_struct_to_allow_trailing_semicolon__
392 int fd_nonblock(int fd, bool nonblock);
393 int fd_cloexec(int fd, bool cloexec);
395 int close_all_fds(const int except[], unsigned n_except);
397 bool fstype_is_network(const char *fstype);
401 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
402 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
403 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
405 int reset_terminal_fd(int fd, bool switch_to_text);
406 int reset_terminal(const char *name);
408 int open_terminal(const char *name, int mode);
409 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
410 int release_terminal(void);
412 int flush_fd(int fd);
414 int ignore_signals(int sig, ...);
415 int default_signals(int sig, ...);
416 int sigaction_many(const struct sigaction *sa, ...);
418 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
420 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
421 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
423 bool is_device_path(const char *path);
425 int dir_is_empty(const char *path);
426 char* dirname_malloc(const char *path);
428 void rename_process(const char name[8]);
430 void sigset_add_many(sigset_t *ss, ...);
431 int sigprocmask_many(int how, ...);
433 bool hostname_is_set(void);
435 char* lookup_uid(uid_t uid);
436 char* gethostname_malloc(void);
437 char* getlogname_malloc(void);
438 char* getusername_malloc(void);
440 int getttyname_malloc(int fd, char **r);
441 int getttyname_harder(int fd, char **r);
443 int get_ctty_devnr(pid_t pid, dev_t *d);
444 int get_ctty(pid_t, dev_t *_devnr, char **r);
446 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
447 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
449 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
450 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
451 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
452 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
454 int pipe_eof(int fd);
456 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
458 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
459 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
461 int fd_columns(int fd);
462 unsigned columns(void);
463 int fd_lines(int fd);
464 unsigned lines(void);
465 void columns_lines_cache_reset(int _unused_ signum);
469 static inline const char *ansi_highlight(void) {
470 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
473 static inline const char *ansi_highlight_red(void) {
474 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
477 static inline const char *ansi_highlight_green(void) {
478 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
481 static inline const char *ansi_highlight_yellow(void) {
482 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
485 static inline const char *ansi_highlight_blue(void) {
486 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
489 static inline const char *ansi_highlight_off(void) {
490 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
493 int files_same(const char *filea, const char *fileb);
495 int running_in_chroot(void);
497 char *ellipsize(const char *s, size_t length, unsigned percent);
499 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
501 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
502 int touch(const char *path);
504 char *unquote(const char *s, const char *quotes);
505 char *normalize_env_assignment(const char *s);
507 int wait_for_terminate(pid_t pid, siginfo_t *status);
508 int wait_for_terminate_and_warn(const char *name, pid_t pid);
510 noreturn void freeze(void);
512 bool null_or_empty(struct stat *st) _pure_;
513 int null_or_empty_path(const char *fn);
514 int null_or_empty_fd(int fd);
516 DIR *xopendirat(int dirfd, const char *name, int flags);
518 char *fstab_node_to_udev_node(const char *p);
520 char *resolve_dev_console(char **active);
521 bool tty_is_vc(const char *tty);
522 bool tty_is_vc_resolve(const char *tty);
523 bool tty_is_console(const char *tty) _pure_;
524 int vtnr_from_tty(const char *tty);
525 const char *default_term_for_tty(const char *tty);
527 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
529 int kill_and_sigcont(pid_t pid, int sig);
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 int file_is_priv_sticky(const char *p);
586 #define NULSTR_FOREACH(i, l) \
587 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
589 #define NULSTR_FOREACH_PAIR(i, j, l) \
590 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
592 int ioprio_class_to_string_alloc(int i, char **s);
593 int ioprio_class_from_string(const char *s);
595 const char *sigchld_code_to_string(int i) _const_;
596 int sigchld_code_from_string(const char *s) _pure_;
598 int log_facility_unshifted_to_string_alloc(int i, char **s);
599 int log_facility_unshifted_from_string(const char *s);
601 int log_level_to_string_alloc(int i, char **s);
602 int log_level_from_string(const char *s);
604 int sched_policy_to_string_alloc(int i, char **s);
605 int sched_policy_from_string(const char *s);
607 const char *rlimit_to_string(int i) _const_;
608 int rlimit_from_string(const char *s) _pure_;
610 int ip_tos_to_string_alloc(int i, char **s);
611 int ip_tos_from_string(const char *s);
613 const char *signal_to_string(int i) _const_;
614 int signal_from_string(const char *s) _pure_;
616 int signal_from_string_try_harder(const char *s);
618 extern int saved_argc;
619 extern char **saved_argv;
621 bool kexec_loaded(void);
623 int prot_from_flags(int flags) _const_;
625 char *format_bytes(char *buf, size_t l, off_t t);
627 int fd_wait_for_event(int fd, int event, usec_t timeout);
629 void* memdup(const void *p, size_t l) _alloc_(2);
631 int is_kernel_thread(pid_t pid);
633 int fd_inc_sndbuf(int fd, size_t n);
634 int fd_inc_rcvbuf(int fd, size_t n);
636 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
638 int setrlimit_closest(int resource, const struct rlimit *rlim);
640 int getenv_for_pid(pid_t pid, const char *field, char **_value);
642 bool is_valid_documentation_url(const char *url) _pure_;
644 bool in_initrd(void);
646 void warn_melody(void);
648 int get_home_dir(char **ret);
649 int get_shell(char **_ret);
651 static inline void freep(void *p) {
655 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
656 static inline void func##p(type *p) { \
660 struct __useless_struct_to_allow_trailing_semicolon__
662 static inline void closep(int *fd) {
666 static inline void umaskp(mode_t *u) {
670 static inline void close_pairp(int (*p)[2]) {
674 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
675 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
676 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
677 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
679 #define _cleanup_free_ _cleanup_(freep)
680 #define _cleanup_close_ _cleanup_(closep)
681 #define _cleanup_umask_ _cleanup_(umaskp)
682 #define _cleanup_globfree_ _cleanup_(globfree)
683 #define _cleanup_fclose_ _cleanup_(fclosep)
684 #define _cleanup_pclose_ _cleanup_(pclosep)
685 #define _cleanup_closedir_ _cleanup_(closedirp)
686 #define _cleanup_endmntent_ _cleanup_(endmntentp)
687 #define _cleanup_close_pair_ _cleanup_(close_pairp)
689 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
690 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
693 return malloc(a * b);
696 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
697 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
700 return realloc(p, a * b);
703 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
704 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
707 return memdup(p, a * b);
710 bool filename_is_safe(const char *p) _pure_;
711 bool path_is_safe(const char *p) _pure_;
712 bool string_is_safe(const char *p) _pure_;
713 bool string_has_cc(const char *p, const char *ok) _pure_;
716 * Check if a string contains any glob patterns.
718 _pure_ static inline bool string_is_glob(const char *p) {
719 return !!strpbrk(p, GLOB_CHARS);
722 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
723 int (*compar) (const void *, const void *, void *),
726 bool is_locale_utf8(void);
728 typedef enum DrawSpecialChar {
733 DRAW_TRIANGULAR_BULLET,
737 _DRAW_SPECIAL_CHAR_MAX
740 const char *draw_special_char(DrawSpecialChar ch);
742 char *strreplace(const char *text, const char *old_string, const char *new_string);
744 char *strip_tab_ansi(char **p, size_t *l);
746 int on_ac_power(void);
748 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
749 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
751 #define FOREACH_LINE(line, f, on_error) \
753 if (!fgets(line, sizeof(line), f)) { \
760 #define FOREACH_DIRENT(de, d, on_error) \
761 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
767 } else if (ignore_file((de)->d_name)) \
771 static inline void *mempset(void *s, int c, size_t n) {
773 return (uint8_t*)s + n;
776 char *hexmem(const void *p, size_t l);
777 void *unhexmem(const char *p, size_t l);
779 char *strextend(char **x, ...) _sentinel_;
780 char *strrep(const char *s, unsigned n);
782 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
783 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
784 #define GREEDY_REALLOC(array, allocated, need) \
785 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
787 #define GREEDY_REALLOC0(array, allocated, need) \
788 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
790 static inline void _reset_errno_(int *saved_errno) {
791 errno = *saved_errno;
794 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
796 struct _umask_struct_ {
801 static inline void _reset_umask_(struct _umask_struct_ *s) {
805 #define RUN_WITH_UMASK(mask) \
806 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
807 !_saved_umask_.quit ; \
808 _saved_umask_.quit = true)
810 static inline unsigned u64log2(uint64_t n) {
811 #if __SIZEOF_LONG_LONG__ == 8
812 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
818 static inline unsigned u32ctz(uint32_t n) {
819 #if __SIZEOF_INT__ == 4
820 return __builtin_ctz(n);
826 static inline int log2i(int x) {
829 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
832 static inline bool logind_running(void) {
833 return access("/run/systemd/seats/", F_OK) >= 0;
836 #define DECIMAL_STR_WIDTH(x) \
838 typeof(x) _x_ = (x); \
845 int unlink_noerrno(const char *path);
851 _new_ = alloca(_len_); \
852 (void *) memset(_new_, 0, _len_); \
855 #define alloca_align(size, align) \
858 size_t _mask_ = (align) - 1; \
859 _ptr_ = alloca((size) + _mask_); \
860 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
863 #define alloca0_align(size, align) \
866 size_t _size_ = (size); \
867 _new_ = alloca_align(_size_, (align)); \
868 (void*)memset(_new_, 0, _size_); \
871 #define strappenda(a, ...) \
873 int _len = strlen(a); \
876 const char *_appendees_[] = { __VA_ARGS__ }; \
877 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
878 _len += strlen(_appendees_[_i]); \
879 _d_ = alloca(_len + 1); \
880 _p_ = stpcpy(_d_, a); \
881 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
882 _p_ = stpcpy(_p_, _appendees_[_i]); \
886 #define procfs_file_alloca(pid, field) \
888 pid_t _pid_ = (pid); \
891 _r_ = ("/proc/self/" field); \
893 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
894 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
899 struct _locale_struct_ {
900 locale_t saved_locale;
905 static inline void _reset_locale_(struct _locale_struct_ *s) {
907 if (s->saved_locale != (locale_t) 0)
908 uselocale(s->saved_locale);
909 if (s->new_locale != (locale_t) 0)
910 freelocale(s->new_locale);
913 #define RUN_WITH_LOCALE(mask, loc) \
914 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
916 if (!_saved_locale_.quit) { \
918 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
919 if (_saved_locale_.new_locale != (locale_t) 0) \
920 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
922 !_saved_locale_.quit; }) ; \
923 _saved_locale_.quit = true)
925 bool id128_is_valid(const char *s) _pure_;
927 int split_pair(const char *s, const char *sep, char **l, char **r);
929 int shall_restore_state(void);
932 * Normal qsort requires base to be nonnull. Here were require
933 * that only if nmemb > 0.
935 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
936 int (*compar)(const void *, const void *)) {
939 qsort(base, nmemb, size, compar);
943 int proc_cmdline(char **ret);
944 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
946 int container_get_leader(const char *machine, pid_t *pid);
948 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
949 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
951 bool pid_is_alive(pid_t pid);
952 bool pid_is_unwaited(pid_t pid);
954 int getpeercred(int fd, struct ucred *ucred);
955 int getpeersec(int fd, char **ret);
957 int writev_safe(int fd, const struct iovec *w, int j);
959 int mkostemp_safe(char *pattern, int flags);
960 int open_tmpfile(const char *path, int flags);
962 int fd_warn_permissions(const char *path, int fd);
964 unsigned long personality_from_string(const char *p);
965 const char *personality_to_string(unsigned long);
967 uint64_t physical_memory(void);
969 char* mount_test_option(const char *haystack, const char *needle);
971 void hexdump(FILE *f, const void *p, size_t s);
973 union file_handle_union {
974 struct file_handle handle;
975 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
978 int update_reboot_param_file(const char *param);
980 int umount_recursive(const char *target, int flags);
982 int bind_remount_recursive(const char *prefix, bool ro);
984 int fflush_and_check(FILE *f);
986 char *tempfn_xxxxxx(const char *p);
987 char *tempfn_random(const char *p);
989 bool is_localhost(const char *hostname);
991 int take_password_lock(const char *root);
993 int is_symlink(const char *path);
995 int unquote_first_word(const char **p, char **ret);
996 int unquote_many_words(const char **p, ...) _sentinel_;
998 int free_and_strdup(char **p, const char *s);