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) { \
300 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
301 if (name##_table[i] && \
302 streq(name##_table[i], s)) \
306 struct __useless_struct_to_allow_trailing_semicolon__
308 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
309 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
311 /* For string conversions where numbers are also acceptable */
312 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
313 int name##_to_string_alloc(type i, char **str) { \
316 if (i < 0 || i > max) \
318 if (i < (type) ELEMENTSOF(name##_table)) { \
319 s = strdup(name##_table[i]); \
323 r = asprintf(&s, "%u", i); \
330 type name##_from_string(const char *s) { \
334 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
335 if (name##_table[i] && \
336 streq(name##_table[i], s)) \
338 if (safe_atou(s, &u) >= 0 && u <= max) \
342 struct __useless_struct_to_allow_trailing_semicolon__
344 int fd_nonblock(int fd, bool nonblock);
345 int fd_cloexec(int fd, bool cloexec);
347 int close_all_fds(const int except[], unsigned n_except);
349 bool fstype_is_network(const char *fstype);
353 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
354 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
356 int reset_terminal_fd(int fd, bool switch_to_text);
357 int reset_terminal(const char *name);
359 int open_terminal(const char *name, int mode);
360 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
361 int release_terminal(void);
363 int flush_fd(int fd);
365 int ignore_signals(int sig, ...);
366 int default_signals(int sig, ...);
367 int sigaction_many(const struct sigaction *sa, ...);
369 int close_pipe(int p[]);
370 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
372 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
373 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
375 bool is_device_path(const char *path);
377 int dir_is_empty(const char *path);
378 char* dirname_malloc(const char *path);
380 void rename_process(const char name[8]);
382 void sigset_add_many(sigset_t *ss, ...);
384 bool hostname_is_set(void);
386 char* gethostname_malloc(void);
387 char* getlogname_malloc(void);
388 char* getusername_malloc(void);
390 int getttyname_malloc(int fd, char **r);
391 int getttyname_harder(int fd, char **r);
393 int get_ctty_devnr(pid_t pid, dev_t *d);
394 int get_ctty(pid_t, dev_t *_devnr, char **r);
396 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
397 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
399 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
400 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
401 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
402 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
404 int pipe_eof(int fd);
406 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
408 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
409 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
410 int status_welcome(void);
412 int fd_columns(int fd);
413 unsigned columns(void);
414 int fd_lines(int fd);
415 unsigned lines(void);
416 void columns_lines_cache_reset(int _unused_ signum);
420 static inline const char *ansi_highlight(void) {
421 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
424 static inline const char *ansi_highlight_red(void) {
425 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
428 static inline const char *ansi_highlight_green(void) {
429 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
432 static inline const char *ansi_highlight_yellow(void) {
433 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
436 static inline const char *ansi_highlight_blue(void) {
437 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
440 static inline const char *ansi_highlight_off(void) {
441 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
444 int running_in_chroot(void);
446 char *ellipsize(const char *s, size_t length, unsigned percent);
448 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
450 int touch(const char *path);
452 char *unquote(const char *s, const char *quotes);
453 char *normalize_env_assignment(const char *s);
455 int wait_for_terminate(pid_t pid, siginfo_t *status);
456 int wait_for_terminate_and_warn(const char *name, pid_t pid);
458 noreturn void freeze(void);
460 bool null_or_empty(struct stat *st) _pure_;
461 int null_or_empty_path(const char *fn);
463 DIR *xopendirat(int dirfd, const char *name, int flags);
465 char *fstab_node_to_udev_node(const char *p);
467 char *resolve_dev_console(char **active);
468 bool tty_is_vc(const char *tty);
469 bool tty_is_vc_resolve(const char *tty);
470 bool tty_is_console(const char *tty) _pure_;
471 int vtnr_from_tty(const char *tty);
472 const char *default_term_for_tty(const char *tty);
474 void execute_directory(const char *directory, DIR *_d, char *argv[]);
476 int kill_and_sigcont(pid_t pid, int sig);
478 bool nulstr_contains(const char*nulstr, const char *needle);
480 bool plymouth_running(void);
482 bool hostname_is_valid(const char *s) _pure_;
483 char* hostname_cleanup(char *s, bool lowercase);
485 char* strshorten(char *s, size_t l);
487 int terminal_vhangup_fd(int fd);
488 int terminal_vhangup(const char *name);
490 int vt_disallocate(const char *name);
492 int copy_file(const char *from, const char *to, int flags);
494 int symlink_atomic(const char *from, const char *to);
496 int fchmod_umask(int fd, mode_t mode);
498 bool display_is_local(const char *display) _pure_;
499 int socket_from_display(const char *display, char **path);
501 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
502 int get_group_creds(const char **groupname, gid_t *gid);
504 int in_gid(gid_t gid);
505 int in_group(const char *name);
507 char* uid_to_name(uid_t uid);
508 char* gid_to_name(gid_t gid);
510 int glob_exists(const char *path);
511 int glob_extend(char ***strv, const char *path);
513 int dirent_ensure_type(DIR *d, struct dirent *de);
515 int in_search_path(const char *path, char **search);
516 int get_files_in_directory(const char *path, char ***list);
518 char *strjoin(const char *x, ...) _sentinel_;
520 bool is_main_thread(void);
522 bool in_charset(const char *s, const char* charset) _pure_;
524 int block_get_whole_disk(dev_t d, dev_t *ret);
526 int file_is_priv_sticky(const char *p);
528 int strdup_or_null(const char *a, char **b);
530 #define NULSTR_FOREACH(i, l) \
531 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
533 #define NULSTR_FOREACH_PAIR(i, j, l) \
534 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
536 int ioprio_class_to_string_alloc(int i, char **s);
537 int ioprio_class_from_string(const char *s);
539 const char *sigchld_code_to_string(int i) _const_;
540 int sigchld_code_from_string(const char *s) _pure_;
542 int log_facility_unshifted_to_string_alloc(int i, char **s);
543 int log_facility_unshifted_from_string(const char *s);
545 int log_level_to_string_alloc(int i, char **s);
546 int log_level_from_string(const char *s);
548 int sched_policy_to_string_alloc(int i, char **s);
549 int sched_policy_from_string(const char *s);
551 const char *rlimit_to_string(int i) _const_;
552 int rlimit_from_string(const char *s) _pure_;
554 int ip_tos_to_string_alloc(int i, char **s);
555 int ip_tos_from_string(const char *s);
557 const char *signal_to_string(int i) _const_;
558 int signal_from_string(const char *s) _pure_;
560 int signal_from_string_try_harder(const char *s);
562 extern int saved_argc;
563 extern char **saved_argv;
565 bool kexec_loaded(void);
567 int prot_from_flags(int flags) _const_;
569 char *format_bytes(char *buf, size_t l, off_t t);
571 int fd_wait_for_event(int fd, int event, usec_t timeout);
573 void* memdup(const void *p, size_t l) _alloc_(2);
575 int is_kernel_thread(pid_t pid);
577 int fd_inc_sndbuf(int fd, size_t n);
578 int fd_inc_rcvbuf(int fd, size_t n);
580 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
582 int setrlimit_closest(int resource, const struct rlimit *rlim);
584 int getenv_for_pid(pid_t pid, const char *field, char **_value);
586 bool is_valid_documentation_url(const char *url) _pure_;
588 bool in_initrd(void);
590 void warn_melody(void);
592 int get_home_dir(char **ret);
593 int get_shell(char **_ret);
595 static inline void freep(void *p) {
599 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
600 static inline void func##p(type *p) { \
604 struct __useless_struct_to_allow_trailing_semicolon__
606 static inline void closep(int *fd) {
608 close_nointr_nofail(*fd);
611 static inline void umaskp(mode_t *u) {
615 static inline void close_pipep(int (*p)[2]) {
619 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
620 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
621 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
622 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
624 #define _cleanup_free_ _cleanup_(freep)
625 #define _cleanup_close_ _cleanup_(closep)
626 #define _cleanup_umask_ _cleanup_(umaskp)
627 #define _cleanup_globfree_ _cleanup_(globfree)
628 #define _cleanup_fclose_ _cleanup_(fclosep)
629 #define _cleanup_pclose_ _cleanup_(pclosep)
630 #define _cleanup_closedir_ _cleanup_(closedirp)
631 #define _cleanup_endmntent_ _cleanup_(endmntentp)
632 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
634 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
635 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
638 return malloc(a * b);
641 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
642 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
645 return memdup(p, a * b);
648 bool filename_is_safe(const char *p) _pure_;
649 bool path_is_safe(const char *p) _pure_;
650 bool string_is_safe(const char *p) _pure_;
651 bool string_has_cc(const char *p) _pure_;
654 * Check if a string contains any glob patterns.
656 _pure_ static inline bool string_is_glob(const char *p) {
657 return !!strpbrk(p, GLOB_CHARS);
660 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
661 int (*compar) (const void *, const void *, void *),
664 bool is_locale_utf8(void);
666 typedef enum DrawSpecialChar {
671 DRAW_TRIANGULAR_BULLET,
673 _DRAW_SPECIAL_CHAR_MAX
675 const char *draw_special_char(DrawSpecialChar ch);
677 char *strreplace(const char *text, const char *old_string, const char *new_string);
679 char *strip_tab_ansi(char **p, size_t *l);
681 int on_ac_power(void);
683 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
684 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
686 #define FOREACH_LINE(line, f, on_error) \
688 if (!fgets(line, sizeof(line), f)) { \
695 #define FOREACH_DIRENT(de, d, on_error) \
696 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
702 } else if (ignore_file((de)->d_name)) \
706 static inline void *mempset(void *s, int c, size_t n) {
708 return (uint8_t*)s + n;
711 char *hexmem(const void *p, size_t l);
712 void *unhexmem(const char *p, size_t l);
714 char *strextend(char **x, ...) _sentinel_;
715 char *strrep(const char *s, unsigned n);
717 void* greedy_realloc(void **p, size_t *allocated, size_t need);
718 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
719 #define GREEDY_REALLOC(array, allocated, need) \
720 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
721 #define GREEDY_REALLOC0(array, allocated, need) \
722 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
724 static inline void _reset_errno_(int *saved_errno) {
725 errno = *saved_errno;
728 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
730 struct _umask_struct_ {
735 static inline void _reset_umask_(struct _umask_struct_ *s) {
739 #define RUN_WITH_UMASK(mask) \
740 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
741 !_saved_umask_.quit ; \
742 _saved_umask_.quit = true)
744 static inline unsigned u64log2(uint64_t n) {
745 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
748 static inline bool logind_running(void) {
749 return access("/run/systemd/seats/", F_OK) >= 0;
752 #define DECIMAL_STR_WIDTH(x) \
754 typeof(x) _x_ = (x); \
761 int unlink_noerrno(const char *path);
767 _new_ = alloca(_len_); \
768 (void *) memset(_new_, 0, _len_); \
771 #define strappenda(a, b) \
773 const char *_a_ = (a), *_b_ = (b); \
778 _c_ = alloca(_x_ + _y_ + 1); \
779 strcpy(stpcpy(_c_, _a_), _b_); \
783 #define procfs_file_alloca(pid, field) \
785 pid_t _pid_ = (pid); \
788 _r_ = ("/proc/self/" field); \
790 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
791 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
796 struct _locale_struct_ {
797 locale_t saved_locale;
802 static inline void _reset_locale_(struct _locale_struct_ *s) {
804 if (s->saved_locale != (locale_t) 0)
805 uselocale(s->saved_locale);
806 if (s->new_locale != (locale_t) 0)
807 freelocale(s->new_locale);
810 #define RUN_WITH_LOCALE(mask, loc) \
811 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
813 if (!_saved_locale_.quit) { \
815 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
816 if (_saved_locale_.new_locale != (locale_t) 0) \
817 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
819 !_saved_locale_.quit; }) ; \
820 _saved_locale_.quit = true)
822 bool id128_is_valid(const char *s) _pure_;
823 void parse_user_at_host(char *arg, char **user, char **host);
825 int split_pair(const char *s, const char *sep, char **l, char **r);
827 int shall_restore_state(void);
830 * Normal qsort requires base to be nonnull. Here were require
831 * that only if nmemb > 0.
833 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
834 int (*compar)(const void *, const void *)) {
837 qsort(base, nmemb, size, compar);
841 int proc_cmdline(char **ret);
843 int container_get_leader(const char *machine, pid_t *pid);
845 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
846 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
848 bool pid_valid(pid_t pid);
850 int getpeercred(int fd, struct ucred *ucred);
851 int getpeersec(int fd, char **ret);