1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
35 #include <sys/types.h>
38 #include <sys/resource.h>
43 #include <sys/socket.h>
46 # define PID_FMT "%" PRIu32
47 #elif SIZEOF_PID_T == 2
48 # define PID_FMT "%" PRIu16
50 # error Unknown pid_t size
54 # define UID_FMT "%" PRIu32
55 #elif SIZEOF_UID_T == 2
56 # define UID_FMT "%" PRIu16
58 # error Unknown uid_t size
62 #include "time-util.h"
64 /* What is interpreted as whitespace? */
65 #define WHITESPACE " \t\n\r"
66 #define NEWLINE "\n\r"
69 #define GLOB_CHARS "*?["
71 #define FORMAT_BYTES_MAX 8
73 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
74 #define ANSI_RED_ON "\x1B[31m"
75 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
76 #define ANSI_GREEN_ON "\x1B[32m"
77 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
78 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
79 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
80 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
81 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
83 size_t page_size(void);
84 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
86 #define streq(a,b) (strcmp((a),(b)) == 0)
87 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
88 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
89 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
91 bool streq_ptr(const char *a, const char *b) _pure_;
93 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
95 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
97 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
99 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
101 #define malloc0(n) (calloc((n), 1))
103 static inline const char* yes_no(bool b) {
104 return b ? "yes" : "no";
107 static inline const char* true_false(bool b) {
108 return b ? "true" : "false";
111 static inline const char* strempty(const char *s) {
115 static inline const char* strnull(const char *s) {
116 return s ? s : "(null)";
119 static inline const char *strna(const char *s) {
120 return s ? s : "n/a";
123 static inline bool isempty(const char *p) {
127 static inline const char *startswith(const char *s, const char *prefix) {
128 if (strncmp(s, prefix, strlen(prefix)) == 0)
129 return s + strlen(prefix);
133 static inline const char *startswith_no_case(const char *s, const char *prefix) {
134 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
135 return s + strlen(prefix);
139 char *endswith(const char *s, const char *postfix) _pure_;
141 bool first_word(const char *s, const char *word) _pure_;
143 int close_nointr(int fd);
144 void close_nointr_nofail(int fd);
145 void close_many(const int fds[], unsigned n_fd);
147 int parse_boolean(const char *v) _pure_;
148 int parse_bytes(const char *t, off_t *bytes);
149 int parse_pid(const char *s, pid_t* ret_pid);
150 int parse_uid(const char *s, uid_t* ret_uid);
151 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
153 int safe_atou(const char *s, unsigned *ret_u);
154 int safe_atoi(const char *s, int *ret_i);
156 int safe_atollu(const char *s, unsigned long long *ret_u);
157 int safe_atolli(const char *s, long long int *ret_i);
159 int safe_atod(const char *s, double *ret_d);
162 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
163 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
164 return safe_atou(s, (unsigned*) ret_u);
166 static inline int safe_atoli(const char *s, long int *ret_u) {
167 assert_cc(sizeof(long int) == sizeof(int));
168 return safe_atoi(s, (int*) ret_u);
171 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
172 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
173 return safe_atollu(s, (unsigned long long*) ret_u);
175 static inline int safe_atoli(const char *s, long int *ret_u) {
176 assert_cc(sizeof(long int) == sizeof(long long int));
177 return safe_atolli(s, (long long int*) ret_u);
181 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
182 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
183 return safe_atou(s, (unsigned*) ret_u);
186 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
187 assert_cc(sizeof(int32_t) == sizeof(int));
188 return safe_atoi(s, (int*) ret_i);
191 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
192 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
193 return safe_atollu(s, (unsigned long long*) ret_u);
196 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
197 assert_cc(sizeof(int64_t) == sizeof(long long int));
198 return safe_atolli(s, (long long int*) ret_i);
201 char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state);
203 #define FOREACH_WORD(word, length, s, state) \
204 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
206 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
207 _FOREACH_WORD(word, length, s, separator, false, state)
209 #define FOREACH_WORD_QUOTED(word, length, s, state) \
210 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
212 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
213 _FOREACH_WORD(word, length, s, separator, true, state)
215 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
216 for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state)))
218 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
219 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
221 char *strappend(const char *s, const char *suffix);
222 char *strnappend(const char *s, const char *suffix, size_t length);
224 char *replace_env(const char *format, char **env);
225 char **replace_env_argv(char **argv, char **env);
227 int readlink_malloc(const char *p, char **r);
228 int readlink_and_make_absolute(const char *p, char **r);
229 int readlink_and_canonicalize(const char *p, char **r);
231 int reset_all_signal_handlers(void);
233 char *strstrip(char *s);
234 char *delete_chars(char *s, const char *bad);
235 char *truncate_nl(char *s);
237 char *file_in_same_dir(const char *path, const char *filename);
239 int rmdir_parents(const char *path, const char *stop);
241 int get_process_comm(pid_t pid, char **name);
242 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
243 int get_process_exe(pid_t pid, char **name);
244 int get_process_uid(pid_t pid, uid_t *uid);
245 int get_process_gid(pid_t pid, gid_t *gid);
246 int get_process_capeff(pid_t pid, char **capeff);
248 char hexchar(int x) _const_;
249 int unhexchar(char c) _const_;
250 char octchar(int x) _const_;
251 int unoctchar(char c) _const_;
252 char decchar(int x) _const_;
253 int undecchar(char c) _const_;
255 char *cescape(const char *s);
256 char *cunescape(const char *s);
257 char *cunescape_length(const char *s, size_t length);
258 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
260 char *xescape(const char *s, const char *bad);
262 char *ascii_strlower(char *path);
264 bool dirent_is_file(const struct dirent *de) _pure_;
265 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
267 bool ignore_file(const char *filename) _pure_;
269 bool chars_intersect(const char *a, const char *b) _pure_;
271 int make_stdio(int fd);
272 int make_null_stdio(void);
273 int make_console_stdio(void);
275 void random_bytes(void *p, size_t n);
277 static inline uint64_t random_u64(void) {
279 random_bytes(&u, sizeof(u));
283 static inline uint32_t random_u32(void) {
285 random_bytes(&u, sizeof(u));
289 /* For basic lookup tables with strictly enumerated entries */
290 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
291 scope const char *name##_to_string(type i) { \
292 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
294 return name##_table[i]; \
296 scope type name##_from_string(const char *s) { \
299 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
300 if (name##_table[i] && \
301 streq(name##_table[i], s)) \
305 struct __useless_struct_to_allow_trailing_semicolon__
307 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
308 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
310 /* For string conversions where numbers are also acceptable */
311 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
312 int name##_to_string_alloc(type i, char **str) { \
315 if (i < 0 || i > max) \
317 if (i < (type) ELEMENTSOF(name##_table)) { \
318 s = strdup(name##_table[i]); \
322 r = asprintf(&s, "%u", i); \
329 type name##_from_string(const char *s) { \
333 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
334 if (name##_table[i] && \
335 streq(name##_table[i], s)) \
337 if (safe_atou(s, &u) >= 0 && u <= max) \
341 struct __useless_struct_to_allow_trailing_semicolon__
343 int fd_nonblock(int fd, bool nonblock);
344 int fd_cloexec(int fd, bool cloexec);
346 int close_all_fds(const int except[], unsigned n_except);
348 bool fstype_is_network(const char *fstype);
352 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
353 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
355 int reset_terminal_fd(int fd, bool switch_to_text);
356 int reset_terminal(const char *name);
358 int open_terminal(const char *name, int mode);
359 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
360 int release_terminal(void);
362 int flush_fd(int fd);
364 int ignore_signals(int sig, ...);
365 int default_signals(int sig, ...);
366 int sigaction_many(const struct sigaction *sa, ...);
368 int close_pipe(int p[]);
369 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
371 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
372 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
374 bool is_device_path(const char *path);
376 int dir_is_empty(const char *path);
377 char* dirname_malloc(const char *path);
379 void rename_process(const char name[8]);
381 void sigset_add_many(sigset_t *ss, ...);
383 bool hostname_is_set(void);
385 char* gethostname_malloc(void);
386 char* getlogname_malloc(void);
387 char* getusername_malloc(void);
389 int getttyname_malloc(int fd, char **r);
390 int getttyname_harder(int fd, char **r);
392 int get_ctty_devnr(pid_t pid, dev_t *d);
393 int get_ctty(pid_t, dev_t *_devnr, char **r);
395 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
396 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
398 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
399 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
400 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
401 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
403 int pipe_eof(int fd);
405 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
407 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
408 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
409 int status_welcome(void);
411 int fd_columns(int fd);
412 unsigned columns(void);
413 int fd_lines(int fd);
414 unsigned lines(void);
415 void columns_lines_cache_reset(int _unused_ signum);
419 static inline const char *ansi_highlight(void) {
420 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
423 static inline const char *ansi_highlight_red(void) {
424 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
427 static inline const char *ansi_highlight_green(void) {
428 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
431 static inline const char *ansi_highlight_yellow(void) {
432 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
435 static inline const char *ansi_highlight_blue(void) {
436 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
439 static inline const char *ansi_highlight_off(void) {
440 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
443 int running_in_chroot(void);
445 char *ellipsize(const char *s, size_t length, unsigned percent);
447 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
449 int touch(const char *path);
451 char *unquote(const char *s, const char *quotes);
452 char *normalize_env_assignment(const char *s);
454 int wait_for_terminate(pid_t pid, siginfo_t *status);
455 int wait_for_terminate_and_warn(const char *name, pid_t pid);
457 noreturn void freeze(void);
459 bool null_or_empty(struct stat *st) _pure_;
460 int null_or_empty_path(const char *fn);
462 DIR *xopendirat(int dirfd, const char *name, int flags);
464 char *fstab_node_to_udev_node(const char *p);
466 char *resolve_dev_console(char **active);
467 bool tty_is_vc(const char *tty);
468 bool tty_is_vc_resolve(const char *tty);
469 bool tty_is_console(const char *tty) _pure_;
470 int vtnr_from_tty(const char *tty);
471 const char *default_term_for_tty(const char *tty);
473 void execute_directory(const char *directory, DIR *_d, char *argv[]);
475 int kill_and_sigcont(pid_t pid, int sig);
477 bool nulstr_contains(const char*nulstr, const char *needle);
479 bool plymouth_running(void);
481 bool hostname_is_valid(const char *s) _pure_;
482 char* hostname_cleanup(char *s, bool lowercase);
484 char* strshorten(char *s, size_t l);
486 int terminal_vhangup_fd(int fd);
487 int terminal_vhangup(const char *name);
489 int vt_disallocate(const char *name);
491 int copy_file(const char *from, const char *to, int flags);
493 int symlink_atomic(const char *from, const char *to);
495 int fchmod_umask(int fd, mode_t mode);
497 bool display_is_local(const char *display) _pure_;
498 int socket_from_display(const char *display, char **path);
500 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
501 int get_group_creds(const char **groupname, gid_t *gid);
503 int in_gid(gid_t gid);
504 int in_group(const char *name);
506 char* uid_to_name(uid_t uid);
507 char* gid_to_name(gid_t gid);
509 int glob_exists(const char *path);
510 int glob_extend(char ***strv, const char *path);
512 int dirent_ensure_type(DIR *d, struct dirent *de);
514 int in_search_path(const char *path, char **search);
515 int get_files_in_directory(const char *path, char ***list);
517 char *strjoin(const char *x, ...) _sentinel_;
519 bool is_main_thread(void);
521 bool in_charset(const char *s, const char* charset) _pure_;
523 int block_get_whole_disk(dev_t d, dev_t *ret);
525 int file_is_priv_sticky(const char *p);
527 int strdup_or_null(const char *a, char **b);
529 #define NULSTR_FOREACH(i, l) \
530 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
532 #define NULSTR_FOREACH_PAIR(i, j, l) \
533 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
535 int ioprio_class_to_string_alloc(int i, char **s);
536 int ioprio_class_from_string(const char *s);
538 const char *sigchld_code_to_string(int i) _const_;
539 int sigchld_code_from_string(const char *s) _pure_;
541 int log_facility_unshifted_to_string_alloc(int i, char **s);
542 int log_facility_unshifted_from_string(const char *s);
544 int log_level_to_string_alloc(int i, char **s);
545 int log_level_from_string(const char *s);
547 int sched_policy_to_string_alloc(int i, char **s);
548 int sched_policy_from_string(const char *s);
550 const char *rlimit_to_string(int i) _const_;
551 int rlimit_from_string(const char *s) _pure_;
553 int ip_tos_to_string_alloc(int i, char **s);
554 int ip_tos_from_string(const char *s);
556 const char *signal_to_string(int i) _const_;
557 int signal_from_string(const char *s) _pure_;
559 int signal_from_string_try_harder(const char *s);
561 extern int saved_argc;
562 extern char **saved_argv;
564 bool kexec_loaded(void);
566 int prot_from_flags(int flags) _const_;
568 char *format_bytes(char *buf, size_t l, off_t t);
570 int fd_wait_for_event(int fd, int event, usec_t timeout);
572 void* memdup(const void *p, size_t l) _alloc_(2);
574 int is_kernel_thread(pid_t pid);
576 int fd_inc_sndbuf(int fd, size_t n);
577 int fd_inc_rcvbuf(int fd, size_t n);
579 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
581 int setrlimit_closest(int resource, const struct rlimit *rlim);
583 int getenv_for_pid(pid_t pid, const char *field, char **_value);
585 bool is_valid_documentation_url(const char *url) _pure_;
587 bool in_initrd(void);
589 void warn_melody(void);
591 int get_home_dir(char **ret);
592 int get_shell(char **_ret);
594 static inline void freep(void *p) {
598 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
599 static inline void func##p(type *p) { \
603 struct __useless_struct_to_allow_trailing_semicolon__
605 static inline void closep(int *fd) {
607 close_nointr_nofail(*fd);
610 static inline void umaskp(mode_t *u) {
614 static inline void close_pipep(int (*p)[2]) {
618 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
619 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
620 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
621 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
623 #define _cleanup_free_ _cleanup_(freep)
624 #define _cleanup_close_ _cleanup_(closep)
625 #define _cleanup_umask_ _cleanup_(umaskp)
626 #define _cleanup_globfree_ _cleanup_(globfree)
627 #define _cleanup_fclose_ _cleanup_(fclosep)
628 #define _cleanup_pclose_ _cleanup_(pclosep)
629 #define _cleanup_closedir_ _cleanup_(closedirp)
630 #define _cleanup_endmntent_ _cleanup_(endmntentp)
631 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
633 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
634 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
637 return malloc(a * b);
640 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
641 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
644 return memdup(p, a * b);
647 bool filename_is_safe(const char *p) _pure_;
648 bool path_is_safe(const char *p) _pure_;
649 bool string_is_safe(const char *p) _pure_;
650 bool string_has_cc(const char *p) _pure_;
653 * Check if a string contains any glob patterns.
655 _pure_ static inline bool string_is_glob(const char *p) {
656 return !!strpbrk(p, GLOB_CHARS);
659 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
660 int (*compar) (const void *, const void *, void *),
663 bool is_locale_utf8(void);
665 typedef enum DrawSpecialChar {
670 DRAW_TRIANGULAR_BULLET,
672 _DRAW_SPECIAL_CHAR_MAX
674 const char *draw_special_char(DrawSpecialChar ch);
676 char *strreplace(const char *text, const char *old_string, const char *new_string);
678 char *strip_tab_ansi(char **p, size_t *l);
680 int on_ac_power(void);
682 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
683 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
685 #define FOREACH_LINE(line, f, on_error) \
687 if (!fgets(line, sizeof(line), f)) { \
694 #define FOREACH_DIRENT(de, d, on_error) \
695 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
701 } else if (ignore_file((de)->d_name)) \
705 static inline void *mempset(void *s, int c, size_t n) {
707 return (uint8_t*)s + n;
710 char *hexmem(const void *p, size_t l);
711 void *unhexmem(const char *p, size_t l);
713 char *strextend(char **x, ...) _sentinel_;
714 char *strrep(const char *s, unsigned n);
716 void* greedy_realloc(void **p, size_t *allocated, size_t need);
717 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
718 #define GREEDY_REALLOC(array, allocated, need) \
719 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
720 #define GREEDY_REALLOC0(array, allocated, need) \
721 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
723 static inline void _reset_errno_(int *saved_errno) {
724 errno = *saved_errno;
727 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
729 struct _umask_struct_ {
734 static inline void _reset_umask_(struct _umask_struct_ *s) {
738 #define RUN_WITH_UMASK(mask) \
739 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
740 !_saved_umask_.quit ; \
741 _saved_umask_.quit = true)
743 static inline unsigned u64log2(uint64_t n) {
744 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
747 static inline bool logind_running(void) {
748 return access("/run/systemd/seats/", F_OK) >= 0;
751 #define DECIMAL_STR_WIDTH(x) \
753 typeof(x) _x_ = (x); \
760 int unlink_noerrno(const char *path);
766 _new_ = alloca(_len_); \
767 (void *) memset(_new_, 0, _len_); \
770 #define strappenda(a, b) \
772 const char *_a_ = (a), *_b_ = (b); \
777 _c_ = alloca(_x_ + _y_ + 1); \
778 strcpy(stpcpy(_c_, _a_), _b_); \
782 #define procfs_file_alloca(pid, field) \
784 pid_t _pid_ = (pid); \
787 _r_ = ("/proc/self/" field); \
789 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
790 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
795 struct _locale_struct_ {
796 locale_t saved_locale;
801 static inline void _reset_locale_(struct _locale_struct_ *s) {
803 if (s->saved_locale != (locale_t) 0)
804 uselocale(s->saved_locale);
805 if (s->new_locale != (locale_t) 0)
806 freelocale(s->new_locale);
809 #define RUN_WITH_LOCALE(mask, loc) \
810 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
812 if (!_saved_locale_.quit) { \
814 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
815 if (_saved_locale_.new_locale != (locale_t) 0) \
816 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
818 !_saved_locale_.quit; }) ; \
819 _saved_locale_.quit = true)
821 bool id128_is_valid(const char *s) _pure_;
822 void parse_user_at_host(char *arg, char **user, char **host);
824 int split_pair(const char *s, const char *sep, char **l, char **r);
826 int shall_restore_state(void);
829 * Normal qsort requires base to be nonnull. Here were require
830 * that only if nmemb > 0.
832 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
833 int (*compar)(const void *, const void *)) {
836 qsort(base, nmemb, size, compar);
840 int proc_cmdline(char **ret);
842 int container_get_leader(const char *machine, pid_t *pid);
844 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
845 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
847 bool pid_valid(pid_t pid);
849 int getpeercred(int fd, struct ucred *ucred);
850 int getpeersec(int fd, char **ret);