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 const char *startswith(const char *s, const char *prefix) {
162 if (strncmp(s, prefix, strlen(prefix)) == 0)
163 return s + strlen(prefix);
167 static inline const char *startswith_no_case(const char *s, const char *prefix) {
168 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
169 return s + strlen(prefix);
173 char *endswith(const char *s, const char *postfix) _pure_;
175 char *first_word(const char *s, const char *word) _pure_;
177 int close_nointr(int fd);
178 int safe_close(int fd);
179 void safe_close_pair(int p[]);
181 void close_many(const int fds[], unsigned n_fd);
183 int parse_size(const char *t, off_t base, off_t *size);
185 int parse_boolean(const char *v) _pure_;
186 int parse_pid(const char *s, pid_t* ret_pid);
187 int parse_uid(const char *s, uid_t* ret_uid);
188 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
190 int safe_atou(const char *s, unsigned *ret_u);
191 int safe_atoi(const char *s, int *ret_i);
193 int safe_atollu(const char *s, unsigned long long *ret_u);
194 int safe_atolli(const char *s, long long int *ret_i);
196 int safe_atod(const char *s, double *ret_d);
198 int safe_atou8(const char *s, uint8_t *ret);
201 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
202 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
203 return safe_atou(s, (unsigned*) ret_u);
205 static inline int safe_atoli(const char *s, long int *ret_u) {
206 assert_cc(sizeof(long int) == sizeof(int));
207 return safe_atoi(s, (int*) ret_u);
210 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
211 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
212 return safe_atollu(s, (unsigned long long*) ret_u);
214 static inline int safe_atoli(const char *s, long int *ret_u) {
215 assert_cc(sizeof(long int) == sizeof(long long int));
216 return safe_atolli(s, (long long int*) ret_u);
220 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
221 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
222 return safe_atou(s, (unsigned*) ret_u);
225 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
226 assert_cc(sizeof(int32_t) == sizeof(int));
227 return safe_atoi(s, (int*) ret_i);
230 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
231 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
232 return safe_atollu(s, (unsigned long long*) ret_u);
235 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
236 assert_cc(sizeof(int64_t) == sizeof(long long int));
237 return safe_atolli(s, (long long int*) ret_i);
240 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
242 #define FOREACH_WORD(word, length, s, state) \
243 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
245 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
246 _FOREACH_WORD(word, length, s, separator, false, state)
248 #define FOREACH_WORD_QUOTED(word, length, s, state) \
249 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
251 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
252 _FOREACH_WORD(word, length, s, separator, true, state)
254 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
255 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
257 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
258 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
260 char *strappend(const char *s, const char *suffix);
261 char *strnappend(const char *s, const char *suffix, size_t length);
263 char *replace_env(const char *format, char **env);
264 char **replace_env_argv(char **argv, char **env);
266 int readlinkat_malloc(int fd, const char *p, char **ret);
267 int readlink_malloc(const char *p, char **r);
268 int readlink_and_make_absolute(const char *p, char **r);
269 int readlink_and_canonicalize(const char *p, char **r);
271 int reset_all_signal_handlers(void);
273 char *strstrip(char *s);
274 char *delete_chars(char *s, const char *bad);
275 char *truncate_nl(char *s);
277 char *file_in_same_dir(const char *path, const char *filename);
279 int rmdir_parents(const char *path, const char *stop);
281 int get_process_state(pid_t pid);
282 int get_process_comm(pid_t pid, char **name);
283 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
284 int get_process_exe(pid_t pid, char **name);
285 int get_process_uid(pid_t pid, uid_t *uid);
286 int get_process_gid(pid_t pid, gid_t *gid);
287 int get_process_capeff(pid_t pid, char **capeff);
289 char hexchar(int x) _const_;
290 int unhexchar(char c) _const_;
291 char octchar(int x) _const_;
292 int unoctchar(char c) _const_;
293 char decchar(int x) _const_;
294 int undecchar(char c) _const_;
296 char *cescape(const char *s);
297 char *cunescape(const char *s);
298 char *cunescape_length(const char *s, size_t length);
299 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
301 char *xescape(const char *s, const char *bad);
303 char *ascii_strlower(char *path);
305 bool dirent_is_file(const struct dirent *de) _pure_;
306 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
308 bool ignore_file(const char *filename) _pure_;
310 bool chars_intersect(const char *a, const char *b) _pure_;
312 int make_stdio(int fd);
313 int make_null_stdio(void);
314 int make_console_stdio(void);
316 int dev_urandom(void *p, size_t n);
317 void random_bytes(void *p, size_t n);
319 static inline uint64_t random_u64(void) {
321 random_bytes(&u, sizeof(u));
325 static inline uint32_t random_u32(void) {
327 random_bytes(&u, sizeof(u));
331 /* For basic lookup tables with strictly enumerated entries */
332 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
333 scope const char *name##_to_string(type i) { \
334 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
336 return name##_table[i]; \
338 scope type name##_from_string(const char *s) { \
342 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
343 if (name##_table[i] && \
344 streq(name##_table[i], s)) \
348 struct __useless_struct_to_allow_trailing_semicolon__
350 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
351 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
353 /* For string conversions where numbers are also acceptable */
354 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
355 int name##_to_string_alloc(type i, char **str) { \
358 if (i < 0 || i > max) \
360 if (i < (type) ELEMENTSOF(name##_table)) { \
361 s = strdup(name##_table[i]); \
365 r = asprintf(&s, "%u", i); \
372 type name##_from_string(const char *s) { \
376 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
377 if (name##_table[i] && \
378 streq(name##_table[i], s)) \
380 if (safe_atou(s, &u) >= 0 && u <= max) \
384 struct __useless_struct_to_allow_trailing_semicolon__
386 int fd_nonblock(int fd, bool nonblock);
387 int fd_cloexec(int fd, bool cloexec);
389 int close_all_fds(const int except[], unsigned n_except);
391 bool fstype_is_network(const char *fstype);
395 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
396 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
397 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
399 int reset_terminal_fd(int fd, bool switch_to_text);
400 int reset_terminal(const char *name);
402 int open_terminal(const char *name, int mode);
403 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
404 int release_terminal(void);
406 int flush_fd(int fd);
408 int ignore_signals(int sig, ...);
409 int default_signals(int sig, ...);
410 int sigaction_many(const struct sigaction *sa, ...);
412 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
414 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
415 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
417 bool is_device_path(const char *path);
419 int dir_is_empty(const char *path);
420 char* dirname_malloc(const char *path);
422 void rename_process(const char name[8]);
424 void sigset_add_many(sigset_t *ss, ...);
425 int sigprocmask_many(int how, ...);
427 bool hostname_is_set(void);
429 char* gethostname_malloc(void);
430 char* getlogname_malloc(void);
431 char* getusername_malloc(void);
433 int getttyname_malloc(int fd, char **r);
434 int getttyname_harder(int fd, char **r);
436 int get_ctty_devnr(pid_t pid, dev_t *d);
437 int get_ctty(pid_t, dev_t *_devnr, char **r);
439 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
440 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
442 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
443 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
444 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
445 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
447 int pipe_eof(int fd);
449 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
451 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
452 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
454 int fd_columns(int fd);
455 unsigned columns(void);
456 int fd_lines(int fd);
457 unsigned lines(void);
458 void columns_lines_cache_reset(int _unused_ signum);
462 static inline const char *ansi_highlight(void) {
463 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
466 static inline const char *ansi_highlight_red(void) {
467 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
470 static inline const char *ansi_highlight_green(void) {
471 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
474 static inline const char *ansi_highlight_yellow(void) {
475 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
478 static inline const char *ansi_highlight_blue(void) {
479 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
482 static inline const char *ansi_highlight_off(void) {
483 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
486 int files_same(const char *filea, const char *fileb);
488 int running_in_chroot(void);
490 char *ellipsize(const char *s, size_t length, unsigned percent);
492 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
494 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
495 int touch(const char *path);
497 char *unquote(const char *s, const char *quotes);
498 char *normalize_env_assignment(const char *s);
500 int wait_for_terminate(pid_t pid, siginfo_t *status);
501 int wait_for_terminate_and_warn(const char *name, pid_t pid);
503 noreturn void freeze(void);
505 bool null_or_empty(struct stat *st) _pure_;
506 int null_or_empty_path(const char *fn);
507 int null_or_empty_fd(int fd);
509 DIR *xopendirat(int dirfd, const char *name, int flags);
511 char *fstab_node_to_udev_node(const char *p);
513 char *resolve_dev_console(char **active);
514 bool tty_is_vc(const char *tty);
515 bool tty_is_vc_resolve(const char *tty);
516 bool tty_is_console(const char *tty) _pure_;
517 int vtnr_from_tty(const char *tty);
518 const char *default_term_for_tty(const char *tty);
520 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
522 int kill_and_sigcont(pid_t pid, int sig);
524 bool nulstr_contains(const char*nulstr, const char *needle);
526 bool plymouth_running(void);
528 bool hostname_is_valid(const char *s) _pure_;
529 char* hostname_cleanup(char *s, bool lowercase);
531 bool machine_name_is_valid(const char *s) _pure_;
533 char* strshorten(char *s, size_t l);
535 int terminal_vhangup_fd(int fd);
536 int terminal_vhangup(const char *name);
538 int vt_disallocate(const char *name);
540 int symlink_atomic(const char *from, const char *to);
541 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
542 int mkfifo_atomic(const char *path, mode_t mode);
544 int fchmod_umask(int fd, mode_t mode);
546 bool display_is_local(const char *display) _pure_;
547 int socket_from_display(const char *display, char **path);
549 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
550 int get_group_creds(const char **groupname, gid_t *gid);
552 int in_gid(gid_t gid);
553 int in_group(const char *name);
555 char* uid_to_name(uid_t uid);
556 char* gid_to_name(gid_t gid);
558 int glob_exists(const char *path);
559 int glob_extend(char ***strv, const char *path);
561 int dirent_ensure_type(DIR *d, struct dirent *de);
563 int get_files_in_directory(const char *path, char ***list);
565 char *strjoin(const char *x, ...) _sentinel_;
567 bool is_main_thread(void);
569 static inline bool _pure_ in_charset(const char *s, const char* charset) {
572 return s[strspn(s, charset)] == '\0';
575 int block_get_whole_disk(dev_t d, dev_t *ret);
577 int file_is_priv_sticky(const char *p);
579 int strdup_or_null(const char *a, char **b);
581 #define NULSTR_FOREACH(i, l) \
582 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
584 #define NULSTR_FOREACH_PAIR(i, j, l) \
585 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
587 int ioprio_class_to_string_alloc(int i, char **s);
588 int ioprio_class_from_string(const char *s);
590 const char *sigchld_code_to_string(int i) _const_;
591 int sigchld_code_from_string(const char *s) _pure_;
593 int log_facility_unshifted_to_string_alloc(int i, char **s);
594 int log_facility_unshifted_from_string(const char *s);
596 int log_level_to_string_alloc(int i, char **s);
597 int log_level_from_string(const char *s);
599 int sched_policy_to_string_alloc(int i, char **s);
600 int sched_policy_from_string(const char *s);
602 const char *rlimit_to_string(int i) _const_;
603 int rlimit_from_string(const char *s) _pure_;
605 int ip_tos_to_string_alloc(int i, char **s);
606 int ip_tos_from_string(const char *s);
608 const char *signal_to_string(int i) _const_;
609 int signal_from_string(const char *s) _pure_;
611 int signal_from_string_try_harder(const char *s);
613 extern int saved_argc;
614 extern char **saved_argv;
616 bool kexec_loaded(void);
618 int prot_from_flags(int flags) _const_;
620 char *format_bytes(char *buf, size_t l, off_t t);
622 int fd_wait_for_event(int fd, int event, usec_t timeout);
624 void* memdup(const void *p, size_t l) _alloc_(2);
626 int is_kernel_thread(pid_t pid);
628 int fd_inc_sndbuf(int fd, size_t n);
629 int fd_inc_rcvbuf(int fd, size_t n);
631 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
633 int setrlimit_closest(int resource, const struct rlimit *rlim);
635 int getenv_for_pid(pid_t pid, const char *field, char **_value);
637 bool is_valid_documentation_url(const char *url) _pure_;
639 bool in_initrd(void);
641 void warn_melody(void);
643 int get_home_dir(char **ret);
644 int get_shell(char **_ret);
646 static inline void freep(void *p) {
650 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
651 static inline void func##p(type *p) { \
655 struct __useless_struct_to_allow_trailing_semicolon__
657 static inline void closep(int *fd) {
661 static inline void umaskp(mode_t *u) {
665 static inline void close_pairp(int (*p)[2]) {
669 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
670 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
671 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
672 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
674 #define _cleanup_free_ _cleanup_(freep)
675 #define _cleanup_close_ _cleanup_(closep)
676 #define _cleanup_umask_ _cleanup_(umaskp)
677 #define _cleanup_globfree_ _cleanup_(globfree)
678 #define _cleanup_fclose_ _cleanup_(fclosep)
679 #define _cleanup_pclose_ _cleanup_(pclosep)
680 #define _cleanup_closedir_ _cleanup_(closedirp)
681 #define _cleanup_endmntent_ _cleanup_(endmntentp)
682 #define _cleanup_close_pair_ _cleanup_(close_pairp)
684 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
685 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
688 return malloc(a * b);
691 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
692 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
695 return realloc(p, a * b);
698 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
699 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
702 return memdup(p, a * b);
705 bool filename_is_safe(const char *p) _pure_;
706 bool path_is_safe(const char *p) _pure_;
707 bool string_is_safe(const char *p) _pure_;
708 bool string_has_cc(const char *p, const char *ok) _pure_;
711 * Check if a string contains any glob patterns.
713 _pure_ static inline bool string_is_glob(const char *p) {
714 return !!strpbrk(p, GLOB_CHARS);
717 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
718 int (*compar) (const void *, const void *, void *),
721 bool is_locale_utf8(void);
723 typedef enum DrawSpecialChar {
728 DRAW_TRIANGULAR_BULLET,
732 _DRAW_SPECIAL_CHAR_MAX
735 const char *draw_special_char(DrawSpecialChar ch);
737 char *strreplace(const char *text, const char *old_string, const char *new_string);
739 char *strip_tab_ansi(char **p, size_t *l);
741 int on_ac_power(void);
743 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
744 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
746 #define FOREACH_LINE(line, f, on_error) \
748 if (!fgets(line, sizeof(line), f)) { \
755 #define FOREACH_DIRENT(de, d, on_error) \
756 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
762 } else if (ignore_file((de)->d_name)) \
766 static inline void *mempset(void *s, int c, size_t n) {
768 return (uint8_t*)s + n;
771 char *hexmem(const void *p, size_t l);
772 void *unhexmem(const char *p, size_t l);
774 char *strextend(char **x, ...) _sentinel_;
775 char *strrep(const char *s, unsigned n);
777 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
778 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
779 #define GREEDY_REALLOC(array, allocated, need) \
780 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
782 #define GREEDY_REALLOC0(array, allocated, need) \
783 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
785 static inline void _reset_errno_(int *saved_errno) {
786 errno = *saved_errno;
789 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
791 struct _umask_struct_ {
796 static inline void _reset_umask_(struct _umask_struct_ *s) {
800 #define RUN_WITH_UMASK(mask) \
801 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
802 !_saved_umask_.quit ; \
803 _saved_umask_.quit = true)
805 static inline unsigned u64log2(uint64_t n) {
806 #if __SIZEOF_LONG_LONG__ == 8
807 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
813 static inline unsigned u32ctz(uint32_t n) {
814 #if __SIZEOF_INT__ == 4
815 return __builtin_ctz(n);
821 static inline int log2i(int x) {
824 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
827 static inline bool logind_running(void) {
828 return access("/run/systemd/seats/", F_OK) >= 0;
831 #define DECIMAL_STR_WIDTH(x) \
833 typeof(x) _x_ = (x); \
840 int unlink_noerrno(const char *path);
846 _new_ = alloca(_len_); \
847 (void *) memset(_new_, 0, _len_); \
850 #define strappenda(a, ...) \
852 int _len = strlen(a); \
855 const char *_appendees_[] = { __VA_ARGS__ }; \
856 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
857 _len += strlen(_appendees_[_i]); \
858 _d_ = alloca(_len + 1); \
859 _p_ = stpcpy(_d_, a); \
860 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
861 _p_ = stpcpy(_p_, _appendees_[_i]); \
865 #define procfs_file_alloca(pid, field) \
867 pid_t _pid_ = (pid); \
870 _r_ = ("/proc/self/" field); \
872 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
873 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
878 struct _locale_struct_ {
879 locale_t saved_locale;
884 static inline void _reset_locale_(struct _locale_struct_ *s) {
886 if (s->saved_locale != (locale_t) 0)
887 uselocale(s->saved_locale);
888 if (s->new_locale != (locale_t) 0)
889 freelocale(s->new_locale);
892 #define RUN_WITH_LOCALE(mask, loc) \
893 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
895 if (!_saved_locale_.quit) { \
897 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
898 if (_saved_locale_.new_locale != (locale_t) 0) \
899 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
901 !_saved_locale_.quit; }) ; \
902 _saved_locale_.quit = true)
904 bool id128_is_valid(const char *s) _pure_;
906 int split_pair(const char *s, const char *sep, char **l, char **r);
908 int shall_restore_state(void);
911 * Normal qsort requires base to be nonnull. Here were require
912 * that only if nmemb > 0.
914 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
915 int (*compar)(const void *, const void *)) {
918 qsort(base, nmemb, size, compar);
922 int proc_cmdline(char **ret);
923 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
925 int container_get_leader(const char *machine, pid_t *pid);
927 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
928 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
930 bool pid_is_alive(pid_t pid);
931 bool pid_is_unwaited(pid_t pid);
933 int getpeercred(int fd, struct ucred *ucred);
934 int getpeersec(int fd, char **ret);
936 int writev_safe(int fd, const struct iovec *w, int j);
938 int mkostemp_safe(char *pattern, int flags);
939 int open_tmpfile(const char *path, int flags);
941 int fd_warn_permissions(const char *path, int fd);
943 unsigned long personality_from_string(const char *p);
944 const char *personality_to_string(unsigned long);
946 uint64_t physical_memory(void);
948 char* mount_test_option(const char *haystack, const char *needle);
950 void hexdump(FILE *f, const void *p, size_t s);
952 union file_handle_union {
953 struct file_handle handle;
954 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
957 int update_reboot_param_file(const char *param);
959 int umount_recursive(const char *target, int flags);
961 int bind_remount_recursive(const char *prefix, bool ro);
963 int fflush_and_check(FILE *f);
965 char *tempfn_xxxxxx(const char *p);
966 char *tempfn_random(const char *p);
968 bool is_localhost(const char *hostname);
970 int take_password_lock(const char *root);
972 int is_symlink(const char *path);
974 int unquote_first_word(const char **p, char **ret);
975 int unquote_many_words(const char **p, ...) _sentinel_;