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_GID_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
87 #include "time-util.h"
89 /* What is interpreted as whitespace? */
90 #define WHITESPACE " \t\n\r"
91 #define NEWLINE "\n\r"
94 #define GLOB_CHARS "*?["
96 /* What characters are special in the shell? */
97 /* must be escaped outside and inside double-quotes */
98 #define SHELL_NEED_ESCAPE "\"\\`$"
99 /* can be escaped or double-quoted */
100 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
102 #define FORMAT_BYTES_MAX 8
104 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
105 #define ANSI_RED_ON "\x1B[31m"
106 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
107 #define ANSI_GREEN_ON "\x1B[32m"
108 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
109 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
110 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
111 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
112 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
114 size_t page_size(void);
115 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
117 #define streq(a,b) (strcmp((a),(b)) == 0)
118 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
119 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
120 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
122 bool streq_ptr(const char *a, const char *b) _pure_;
124 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
126 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
128 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
130 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
132 #define malloc0(n) (calloc((n), 1))
134 static inline const char* yes_no(bool b) {
135 return b ? "yes" : "no";
138 static inline const char* true_false(bool b) {
139 return b ? "true" : "false";
142 static inline const char* strempty(const char *s) {
146 static inline const char* strnull(const char *s) {
147 return s ? s : "(null)";
150 static inline const char *strna(const char *s) {
151 return s ? s : "n/a";
154 static inline bool isempty(const char *p) {
158 static inline const char *startswith(const char *s, const char *prefix) {
159 if (strncmp(s, prefix, strlen(prefix)) == 0)
160 return s + strlen(prefix);
164 static inline const char *startswith_no_case(const char *s, const char *prefix) {
165 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
166 return s + strlen(prefix);
170 char *endswith(const char *s, const char *postfix) _pure_;
172 bool first_word(const char *s, const char *word) _pure_;
174 int close_nointr(int fd);
175 int safe_close(int fd);
176 void safe_close_pair(int p[]);
178 void close_many(const int fds[], unsigned n_fd);
180 int parse_size(const char *t, off_t base, off_t *size);
182 int parse_boolean(const char *v) _pure_;
183 int parse_pid(const char *s, pid_t* ret_pid);
184 int parse_uid(const char *s, uid_t* ret_uid);
185 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
187 int safe_atou(const char *s, unsigned *ret_u);
188 int safe_atoi(const char *s, int *ret_i);
190 int safe_atollu(const char *s, unsigned long long *ret_u);
191 int safe_atolli(const char *s, long long int *ret_i);
193 int safe_atod(const char *s, double *ret_d);
195 int safe_atou8(const char *s, uint8_t *ret);
198 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
199 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
200 return safe_atou(s, (unsigned*) ret_u);
202 static inline int safe_atoli(const char *s, long int *ret_u) {
203 assert_cc(sizeof(long int) == sizeof(int));
204 return safe_atoi(s, (int*) ret_u);
207 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
208 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
209 return safe_atollu(s, (unsigned long long*) ret_u);
211 static inline int safe_atoli(const char *s, long int *ret_u) {
212 assert_cc(sizeof(long int) == sizeof(long long int));
213 return safe_atolli(s, (long long int*) ret_u);
217 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
218 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
219 return safe_atou(s, (unsigned*) ret_u);
222 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
223 assert_cc(sizeof(int32_t) == sizeof(int));
224 return safe_atoi(s, (int*) ret_i);
227 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
228 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
229 return safe_atollu(s, (unsigned long long*) ret_u);
232 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
233 assert_cc(sizeof(int64_t) == sizeof(long long int));
234 return safe_atolli(s, (long long int*) ret_i);
237 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
239 #define FOREACH_WORD(word, length, s, state) \
240 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
242 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
243 _FOREACH_WORD(word, length, s, separator, false, state)
245 #define FOREACH_WORD_QUOTED(word, length, s, state) \
246 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
248 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
249 _FOREACH_WORD(word, length, s, separator, true, state)
251 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
252 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
254 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
255 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
257 char *strappend(const char *s, const char *suffix);
258 char *strnappend(const char *s, const char *suffix, size_t length);
260 char *replace_env(const char *format, char **env);
261 char **replace_env_argv(char **argv, char **env);
263 int readlinkat_malloc(int fd, const char *p, char **ret);
264 int readlink_malloc(const char *p, char **r);
265 int readlink_and_make_absolute(const char *p, char **r);
266 int readlink_and_canonicalize(const char *p, char **r);
268 int reset_all_signal_handlers(void);
270 char *strstrip(char *s);
271 char *delete_chars(char *s, const char *bad);
272 char *truncate_nl(char *s);
274 char *file_in_same_dir(const char *path, const char *filename);
276 int rmdir_parents(const char *path, const char *stop);
278 int get_process_state(pid_t pid);
279 int get_process_comm(pid_t pid, char **name);
280 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
281 int get_process_exe(pid_t pid, char **name);
282 int get_process_uid(pid_t pid, uid_t *uid);
283 int get_process_gid(pid_t pid, gid_t *gid);
284 int get_process_capeff(pid_t pid, char **capeff);
286 char hexchar(int x) _const_;
287 int unhexchar(char c) _const_;
288 char octchar(int x) _const_;
289 int unoctchar(char c) _const_;
290 char decchar(int x) _const_;
291 int undecchar(char c) _const_;
293 char *cescape(const char *s);
294 char *cunescape(const char *s);
295 char *cunescape_length(const char *s, size_t length);
296 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
298 char *xescape(const char *s, const char *bad);
300 char *ascii_strlower(char *path);
302 bool dirent_is_file(const struct dirent *de) _pure_;
303 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
305 bool ignore_file(const char *filename) _pure_;
307 bool chars_intersect(const char *a, const char *b) _pure_;
309 int make_stdio(int fd);
310 int make_null_stdio(void);
311 int make_console_stdio(void);
313 int dev_urandom(void *p, size_t n);
314 void random_bytes(void *p, size_t n);
316 static inline uint64_t random_u64(void) {
318 random_bytes(&u, sizeof(u));
322 static inline uint32_t random_u32(void) {
324 random_bytes(&u, sizeof(u));
328 /* For basic lookup tables with strictly enumerated entries */
329 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
330 scope const char *name##_to_string(type i) { \
331 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
333 return name##_table[i]; \
335 scope type name##_from_string(const char *s) { \
339 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
340 if (name##_table[i] && \
341 streq(name##_table[i], s)) \
345 struct __useless_struct_to_allow_trailing_semicolon__
347 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
348 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
350 /* For string conversions where numbers are also acceptable */
351 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
352 int name##_to_string_alloc(type i, char **str) { \
355 if (i < 0 || i > max) \
357 if (i < (type) ELEMENTSOF(name##_table)) { \
358 s = strdup(name##_table[i]); \
362 r = asprintf(&s, "%u", i); \
369 type name##_from_string(const char *s) { \
373 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
374 if (name##_table[i] && \
375 streq(name##_table[i], s)) \
377 if (safe_atou(s, &u) >= 0 && u <= max) \
381 struct __useless_struct_to_allow_trailing_semicolon__
383 int fd_nonblock(int fd, bool nonblock);
384 int fd_cloexec(int fd, bool cloexec);
386 int close_all_fds(const int except[], unsigned n_except);
388 bool fstype_is_network(const char *fstype);
392 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
393 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
394 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
396 int reset_terminal_fd(int fd, bool switch_to_text);
397 int reset_terminal(const char *name);
399 int open_terminal(const char *name, int mode);
400 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
401 int release_terminal(void);
403 int flush_fd(int fd);
405 int ignore_signals(int sig, ...);
406 int default_signals(int sig, ...);
407 int sigaction_many(const struct sigaction *sa, ...);
409 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
411 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
412 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
414 bool is_device_path(const char *path);
416 int dir_is_empty(const char *path);
417 char* dirname_malloc(const char *path);
419 void rename_process(const char name[8]);
421 void sigset_add_many(sigset_t *ss, ...);
422 int sigprocmask_many(int how, ...);
424 bool hostname_is_set(void);
426 char* gethostname_malloc(void);
427 char* getlogname_malloc(void);
428 char* getusername_malloc(void);
430 int getttyname_malloc(int fd, char **r);
431 int getttyname_harder(int fd, char **r);
433 int get_ctty_devnr(pid_t pid, dev_t *d);
434 int get_ctty(pid_t, dev_t *_devnr, char **r);
436 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
437 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
439 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
440 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
441 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
442 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
444 int pipe_eof(int fd);
446 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
448 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
449 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
451 int fd_columns(int fd);
452 unsigned columns(void);
453 int fd_lines(int fd);
454 unsigned lines(void);
455 void columns_lines_cache_reset(int _unused_ signum);
459 static inline const char *ansi_highlight(void) {
460 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
463 static inline const char *ansi_highlight_red(void) {
464 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
467 static inline const char *ansi_highlight_green(void) {
468 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
471 static inline const char *ansi_highlight_yellow(void) {
472 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
475 static inline const char *ansi_highlight_blue(void) {
476 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
479 static inline const char *ansi_highlight_off(void) {
480 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
483 int files_same(const char *filea, const char *fileb);
485 int running_in_chroot(void);
487 char *ellipsize(const char *s, size_t length, unsigned percent);
489 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
491 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
492 int touch(const char *path);
494 char *unquote(const char *s, const char *quotes);
495 char *normalize_env_assignment(const char *s);
497 int wait_for_terminate(pid_t pid, siginfo_t *status);
498 int wait_for_terminate_and_warn(const char *name, pid_t pid);
500 noreturn void freeze(void);
502 bool null_or_empty(struct stat *st) _pure_;
503 int null_or_empty_path(const char *fn);
504 int null_or_empty_fd(int fd);
506 DIR *xopendirat(int dirfd, const char *name, int flags);
508 char *fstab_node_to_udev_node(const char *p);
510 char *resolve_dev_console(char **active);
511 bool tty_is_vc(const char *tty);
512 bool tty_is_vc_resolve(const char *tty);
513 bool tty_is_console(const char *tty) _pure_;
514 int vtnr_from_tty(const char *tty);
515 const char *default_term_for_tty(const char *tty);
517 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
519 int kill_and_sigcont(pid_t pid, int sig);
521 bool nulstr_contains(const char*nulstr, const char *needle);
523 bool plymouth_running(void);
525 bool hostname_is_valid(const char *s) _pure_;
526 char* hostname_cleanup(char *s, bool lowercase);
528 bool machine_name_is_valid(const char *s) _pure_;
530 char* strshorten(char *s, size_t l);
532 int terminal_vhangup_fd(int fd);
533 int terminal_vhangup(const char *name);
535 int vt_disallocate(const char *name);
537 int symlink_atomic(const char *from, const char *to);
538 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
539 int mkfifo_atomic(const char *path, mode_t mode);
541 int fchmod_umask(int fd, mode_t mode);
543 bool display_is_local(const char *display) _pure_;
544 int socket_from_display(const char *display, char **path);
546 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
547 int get_group_creds(const char **groupname, gid_t *gid);
549 int in_gid(gid_t gid);
550 int in_group(const char *name);
552 char* uid_to_name(uid_t uid);
553 char* gid_to_name(gid_t gid);
555 int glob_exists(const char *path);
556 int glob_extend(char ***strv, const char *path);
558 int dirent_ensure_type(DIR *d, struct dirent *de);
560 int get_files_in_directory(const char *path, char ***list);
562 char *strjoin(const char *x, ...) _sentinel_;
564 bool is_main_thread(void);
566 static inline bool _pure_ in_charset(const char *s, const char* charset) {
569 return s[strspn(s, charset)] == '\0';
572 int block_get_whole_disk(dev_t d, dev_t *ret);
574 int file_is_priv_sticky(const char *p);
576 int strdup_or_null(const char *a, char **b);
578 #define NULSTR_FOREACH(i, l) \
579 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
581 #define NULSTR_FOREACH_PAIR(i, j, l) \
582 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
584 int ioprio_class_to_string_alloc(int i, char **s);
585 int ioprio_class_from_string(const char *s);
587 const char *sigchld_code_to_string(int i) _const_;
588 int sigchld_code_from_string(const char *s) _pure_;
590 int log_facility_unshifted_to_string_alloc(int i, char **s);
591 int log_facility_unshifted_from_string(const char *s);
593 int log_level_to_string_alloc(int i, char **s);
594 int log_level_from_string(const char *s);
596 int sched_policy_to_string_alloc(int i, char **s);
597 int sched_policy_from_string(const char *s);
599 const char *rlimit_to_string(int i) _const_;
600 int rlimit_from_string(const char *s) _pure_;
602 int ip_tos_to_string_alloc(int i, char **s);
603 int ip_tos_from_string(const char *s);
605 const char *signal_to_string(int i) _const_;
606 int signal_from_string(const char *s) _pure_;
608 int signal_from_string_try_harder(const char *s);
610 extern int saved_argc;
611 extern char **saved_argv;
613 bool kexec_loaded(void);
615 int prot_from_flags(int flags) _const_;
617 char *format_bytes(char *buf, size_t l, off_t t);
619 int fd_wait_for_event(int fd, int event, usec_t timeout);
621 void* memdup(const void *p, size_t l) _alloc_(2);
623 int is_kernel_thread(pid_t pid);
625 int fd_inc_sndbuf(int fd, size_t n);
626 int fd_inc_rcvbuf(int fd, size_t n);
628 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
630 int setrlimit_closest(int resource, const struct rlimit *rlim);
632 int getenv_for_pid(pid_t pid, const char *field, char **_value);
634 bool is_valid_documentation_url(const char *url) _pure_;
636 bool in_initrd(void);
638 void warn_melody(void);
640 int get_home_dir(char **ret);
641 int get_shell(char **_ret);
643 static inline void freep(void *p) {
647 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
648 static inline void func##p(type *p) { \
652 struct __useless_struct_to_allow_trailing_semicolon__
654 static inline void closep(int *fd) {
658 static inline void umaskp(mode_t *u) {
662 static inline void close_pairp(int (*p)[2]) {
666 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
667 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
668 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
669 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
671 #define _cleanup_free_ _cleanup_(freep)
672 #define _cleanup_close_ _cleanup_(closep)
673 #define _cleanup_umask_ _cleanup_(umaskp)
674 #define _cleanup_globfree_ _cleanup_(globfree)
675 #define _cleanup_fclose_ _cleanup_(fclosep)
676 #define _cleanup_pclose_ _cleanup_(pclosep)
677 #define _cleanup_closedir_ _cleanup_(closedirp)
678 #define _cleanup_endmntent_ _cleanup_(endmntentp)
679 #define _cleanup_close_pair_ _cleanup_(close_pairp)
681 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
682 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
685 return malloc(a * b);
688 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
689 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
692 return realloc(p, a * b);
695 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
696 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
699 return memdup(p, a * b);
702 bool filename_is_safe(const char *p) _pure_;
703 bool path_is_safe(const char *p) _pure_;
704 bool string_is_safe(const char *p) _pure_;
705 bool string_has_cc(const char *p, const char *ok) _pure_;
708 * Check if a string contains any glob patterns.
710 _pure_ static inline bool string_is_glob(const char *p) {
711 return !!strpbrk(p, GLOB_CHARS);
714 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
715 int (*compar) (const void *, const void *, 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 (ignore_file((de)->d_name)) \
763 static inline void *mempset(void *s, int c, size_t n) {
765 return (uint8_t*)s + n;
768 char *hexmem(const void *p, size_t l);
769 void *unhexmem(const char *p, size_t l);
771 char *strextend(char **x, ...) _sentinel_;
772 char *strrep(const char *s, unsigned n);
774 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
775 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
776 #define GREEDY_REALLOC(array, allocated, need) \
777 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
779 #define GREEDY_REALLOC0(array, allocated, need) \
780 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
782 static inline void _reset_errno_(int *saved_errno) {
783 errno = *saved_errno;
786 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
788 struct _umask_struct_ {
793 static inline void _reset_umask_(struct _umask_struct_ *s) {
797 #define RUN_WITH_UMASK(mask) \
798 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
799 !_saved_umask_.quit ; \
800 _saved_umask_.quit = true)
802 static inline unsigned u64log2(uint64_t n) {
803 #if __SIZEOF_LONG_LONG__ == 8
804 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
810 static inline unsigned u32ctz(uint32_t n) {
811 #if __SIZEOF_INT__ == 4
812 return __builtin_ctz(n);
818 static inline int log2i(int x) {
821 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
824 static inline bool logind_running(void) {
825 return access("/run/systemd/seats/", F_OK) >= 0;
828 #define DECIMAL_STR_WIDTH(x) \
830 typeof(x) _x_ = (x); \
837 int unlink_noerrno(const char *path);
843 _new_ = alloca(_len_); \
844 (void *) memset(_new_, 0, _len_); \
847 #define strappenda(a, b) \
849 const char *_a_ = (a), *_b_ = (b); \
854 _c_ = alloca(_x_ + _y_ + 1); \
855 strcpy(stpcpy(_c_, _a_), _b_); \
859 #define strappenda3(a, b, c) \
861 const char *_a_ = (a), *_b_ = (b), *_c_ = (c); \
863 size_t _x_, _y_, _z_; \
867 _d_ = alloca(_x_ + _y_ + _z_ + 1); \
868 strcpy(stpcpy(stpcpy(_d_, _a_), _b_), _c_); \
872 #define procfs_file_alloca(pid, field) \
874 pid_t _pid_ = (pid); \
877 _r_ = ("/proc/self/" field); \
879 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
880 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
885 struct _locale_struct_ {
886 locale_t saved_locale;
891 static inline void _reset_locale_(struct _locale_struct_ *s) {
893 if (s->saved_locale != (locale_t) 0)
894 uselocale(s->saved_locale);
895 if (s->new_locale != (locale_t) 0)
896 freelocale(s->new_locale);
899 #define RUN_WITH_LOCALE(mask, loc) \
900 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
902 if (!_saved_locale_.quit) { \
904 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
905 if (_saved_locale_.new_locale != (locale_t) 0) \
906 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
908 !_saved_locale_.quit; }) ; \
909 _saved_locale_.quit = true)
911 bool id128_is_valid(const char *s) _pure_;
913 int split_pair(const char *s, const char *sep, char **l, char **r);
915 int shall_restore_state(void);
918 * Normal qsort requires base to be nonnull. Here were require
919 * that only if nmemb > 0.
921 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
922 int (*compar)(const void *, const void *)) {
925 qsort(base, nmemb, size, compar);
929 int proc_cmdline(char **ret);
930 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
932 int container_get_leader(const char *machine, pid_t *pid);
934 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
935 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
937 bool pid_is_alive(pid_t pid);
938 bool pid_is_unwaited(pid_t pid);
940 int getpeercred(int fd, struct ucred *ucred);
941 int getpeersec(int fd, char **ret);
943 int writev_safe(int fd, const struct iovec *w, int j);
945 int mkostemp_safe(char *pattern, int flags);
946 int open_tmpfile(const char *path, int flags);
948 int fd_warn_permissions(const char *path, int fd);
950 unsigned long personality_from_string(const char *p);
951 const char *personality_to_string(unsigned long);
953 uint64_t physical_memory(void);
955 char* mount_test_option(const char *haystack, const char *needle);
957 void hexdump(FILE *f, const void *p, size_t s);
959 union file_handle_union {
960 struct file_handle handle;
961 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
964 int update_reboot_param_file(const char *param);
966 int umount_recursive(const char *target, int flags);
968 int bind_remount_recursive(const char *prefix, bool ro);
970 int fflush_and_check(FILE *f);
972 char *tempfn_xxxxxx(const char *p);
973 char *tempfn_random(const char *p);
975 bool is_localhost(const char *hostname);
977 int take_password_lock(const char *root);