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>
45 #include "time-util.h"
47 /* What is interpreted as whitespace? */
48 #define WHITESPACE " \t\n\r"
49 #define NEWLINE "\n\r"
53 #define FORMAT_BYTES_MAX 8
55 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
56 #define ANSI_RED_ON "\x1B[31m"
57 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
58 #define ANSI_GREEN_ON "\x1B[32m"
59 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
60 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
61 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
62 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
63 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
65 size_t page_size(void);
66 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
68 #define streq(a,b) (strcmp((a),(b)) == 0)
69 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
70 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
71 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
73 bool streq_ptr(const char *a, const char *b) _pure_;
75 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
77 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
79 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
81 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
83 #define malloc0(n) (calloc((n), 1))
85 static inline const char* yes_no(bool b) {
86 return b ? "yes" : "no";
89 static inline const char* true_false(bool b) {
90 return b ? "true" : "false";
93 static inline const char* strempty(const char *s) {
97 static inline const char* strnull(const char *s) {
98 return s ? s : "(null)";
101 static inline const char *strna(const char *s) {
102 return s ? s : "n/a";
105 static inline bool isempty(const char *p) {
109 static inline const char *startswith(const char *s, const char *prefix) {
110 if (strncmp(s, prefix, strlen(prefix)) == 0)
111 return s + strlen(prefix);
115 static inline const char *startswith_no_case(const char *s, const char *prefix) {
116 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
117 return s + strlen(prefix);
121 char *endswith(const char *s, const char *postfix) _pure_;
123 bool first_word(const char *s, const char *word) _pure_;
125 int close_nointr(int fd);
126 void close_nointr_nofail(int fd);
127 void close_many(const int fds[], unsigned n_fd);
129 int parse_boolean(const char *v) _pure_;
130 int parse_bytes(const char *t, off_t *bytes);
131 int parse_pid(const char *s, pid_t* ret_pid);
132 int parse_uid(const char *s, uid_t* ret_uid);
133 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
135 int safe_atou(const char *s, unsigned *ret_u);
136 int safe_atoi(const char *s, int *ret_i);
138 int safe_atollu(const char *s, unsigned long long *ret_u);
139 int safe_atolli(const char *s, long long int *ret_i);
141 int safe_atod(const char *s, double *ret_d);
144 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
145 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
146 return safe_atou(s, (unsigned*) ret_u);
148 static inline int safe_atoli(const char *s, long int *ret_u) {
149 assert_cc(sizeof(long int) == sizeof(int));
150 return safe_atoi(s, (int*) ret_u);
153 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
154 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
155 return safe_atollu(s, (unsigned long long*) ret_u);
157 static inline int safe_atoli(const char *s, long int *ret_u) {
158 assert_cc(sizeof(long int) == sizeof(long long int));
159 return safe_atolli(s, (long long int*) ret_u);
163 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
164 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
165 return safe_atou(s, (unsigned*) ret_u);
168 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
169 assert_cc(sizeof(int32_t) == sizeof(int));
170 return safe_atoi(s, (int*) ret_i);
173 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
174 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
175 return safe_atollu(s, (unsigned long long*) ret_u);
178 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
179 assert_cc(sizeof(int64_t) == sizeof(long long int));
180 return safe_atolli(s, (long long int*) ret_i);
183 char *split(const char *c, size_t *l, const char *separator, char **state);
184 char *split_quoted(const char *c, size_t *l, char **state);
186 #define FOREACH_WORD(word, length, s, state) \
187 for ((state) = NULL, (word) = split((s), &(length), WHITESPACE, &(state)); (word); (word) = split((s), &(length), WHITESPACE, &(state)))
189 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
190 for ((state) = NULL, (word) = split((s), &(length), (separator), &(state)); (word); (word) = split((s), &(length), (separator), &(state)))
192 #define FOREACH_WORD_QUOTED(word, length, s, state) \
193 for ((state) = NULL, (word) = split_quoted((s), &(length), &(state)); (word); (word) = split_quoted((s), &(length), &(state)))
195 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
196 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
198 char *strappend(const char *s, const char *suffix);
199 char *strnappend(const char *s, const char *suffix, size_t length);
201 char *replace_env(const char *format, char **env);
202 char **replace_env_argv(char **argv, char **env);
204 int readlink_malloc(const char *p, char **r);
205 int readlink_and_make_absolute(const char *p, char **r);
206 int readlink_and_canonicalize(const char *p, char **r);
208 int reset_all_signal_handlers(void);
210 char *strstrip(char *s);
211 char *delete_chars(char *s, const char *bad);
212 char *truncate_nl(char *s);
214 char *file_in_same_dir(const char *path, const char *filename);
216 int rmdir_parents(const char *path, const char *stop);
218 int get_process_comm(pid_t pid, char **name);
219 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
220 int get_process_exe(pid_t pid, char **name);
221 int get_process_uid(pid_t pid, uid_t *uid);
222 int get_process_gid(pid_t pid, gid_t *gid);
223 int get_process_capeff(pid_t pid, char **capeff);
225 char hexchar(int x) _const_;
226 int unhexchar(char c) _const_;
227 char octchar(int x) _const_;
228 int unoctchar(char c) _const_;
229 char decchar(int x) _const_;
230 int undecchar(char c) _const_;
232 char *cescape(const char *s);
233 char *cunescape(const char *s);
234 char *cunescape_length(const char *s, size_t length);
235 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
237 char *xescape(const char *s, const char *bad);
239 char *ascii_strlower(char *path);
241 bool dirent_is_file(const struct dirent *de) _pure_;
242 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
244 bool ignore_file(const char *filename) _pure_;
246 bool chars_intersect(const char *a, const char *b) _pure_;
248 int make_stdio(int fd);
249 int make_null_stdio(void);
250 int make_console_stdio(void);
252 void random_bytes(void *p, size_t n);
254 static inline uint64_t random_u64(void) {
256 random_bytes(&u, sizeof(u));
260 static inline uint32_t random_u32(void) {
262 random_bytes(&u, sizeof(u));
266 /* For basic lookup tables with strictly enumerated entries */
267 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
268 scope const char *name##_to_string(type i) { \
269 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
271 return name##_table[i]; \
273 scope type name##_from_string(const char *s) { \
276 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
277 if (name##_table[i] && \
278 streq(name##_table[i], s)) \
282 struct __useless_struct_to_allow_trailing_semicolon__
284 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
285 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
287 /* For string conversions where numbers are also acceptable */
288 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
289 int name##_to_string_alloc(type i, char **str) { \
292 if (i < 0 || i > max) \
294 if (i < (type) ELEMENTSOF(name##_table)) { \
295 s = strdup(name##_table[i]); \
299 r = asprintf(&s, "%u", i); \
306 type name##_from_string(const char *s) { \
310 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
311 if (name##_table[i] && \
312 streq(name##_table[i], s)) \
314 if (safe_atou(s, &u) >= 0 && u <= max) \
318 struct __useless_struct_to_allow_trailing_semicolon__
320 int fd_nonblock(int fd, bool nonblock);
321 int fd_cloexec(int fd, bool cloexec);
323 int close_all_fds(const int except[], unsigned n_except);
325 bool fstype_is_network(const char *fstype);
329 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
330 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
332 int reset_terminal_fd(int fd, bool switch_to_text);
333 int reset_terminal(const char *name);
335 int open_terminal(const char *name, int mode);
336 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
337 int release_terminal(void);
339 int flush_fd(int fd);
341 int ignore_signals(int sig, ...);
342 int default_signals(int sig, ...);
343 int sigaction_many(const struct sigaction *sa, ...);
345 int close_pipe(int p[]);
346 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
348 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
349 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
351 bool is_device_path(const char *path);
353 int dir_is_empty(const char *path);
354 char* dirname_malloc(const char *path);
356 void rename_process(const char name[8]);
358 void sigset_add_many(sigset_t *ss, ...);
360 bool hostname_is_set(void);
362 char* gethostname_malloc(void);
363 char* getlogname_malloc(void);
364 char* getusername_malloc(void);
366 int getttyname_malloc(int fd, char **r);
367 int getttyname_harder(int fd, char **r);
369 int get_ctty_devnr(pid_t pid, dev_t *d);
370 int get_ctty(pid_t, dev_t *_devnr, char **r);
372 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
373 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
375 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
376 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
377 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
378 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
380 int pipe_eof(int fd);
382 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
384 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
385 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
386 int status_welcome(void);
388 int fd_columns(int fd);
389 unsigned columns(void);
390 int fd_lines(int fd);
391 unsigned lines(void);
392 void columns_lines_cache_reset(int _unused_ signum);
396 static inline const char *ansi_highlight(void) {
397 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
400 static inline const char *ansi_highlight_red(void) {
401 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
404 static inline const char *ansi_highlight_green(void) {
405 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
408 static inline const char *ansi_highlight_yellow(void) {
409 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
412 static inline const char *ansi_highlight_blue(void) {
413 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
416 static inline const char *ansi_highlight_off(void) {
417 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
420 int running_in_chroot(void);
422 char *ellipsize(const char *s, size_t length, unsigned percent);
424 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
426 int touch(const char *path);
428 char *unquote(const char *s, const char *quotes);
429 char *normalize_env_assignment(const char *s);
431 int wait_for_terminate(pid_t pid, siginfo_t *status);
432 int wait_for_terminate_and_warn(const char *name, pid_t pid);
434 noreturn void freeze(void);
436 bool null_or_empty(struct stat *st) _pure_;
437 int null_or_empty_path(const char *fn);
439 DIR *xopendirat(int dirfd, const char *name, int flags);
441 char *fstab_node_to_udev_node(const char *p);
443 char *resolve_dev_console(char **active);
444 bool tty_is_vc(const char *tty);
445 bool tty_is_vc_resolve(const char *tty);
446 bool tty_is_console(const char *tty) _pure_;
447 int vtnr_from_tty(const char *tty);
448 const char *default_term_for_tty(const char *tty);
450 void execute_directory(const char *directory, DIR *_d, char *argv[]);
452 int kill_and_sigcont(pid_t pid, int sig);
454 bool nulstr_contains(const char*nulstr, const char *needle);
456 bool plymouth_running(void);
458 bool hostname_is_valid(const char *s) _pure_;
459 char* hostname_cleanup(char *s, bool lowercase);
461 char* strshorten(char *s, size_t l);
463 int terminal_vhangup_fd(int fd);
464 int terminal_vhangup(const char *name);
466 int vt_disallocate(const char *name);
468 int copy_file(const char *from, const char *to, int flags);
470 int symlink_atomic(const char *from, const char *to);
472 int fchmod_umask(int fd, mode_t mode);
474 bool display_is_local(const char *display) _pure_;
475 int socket_from_display(const char *display, char **path);
477 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
478 int get_group_creds(const char **groupname, gid_t *gid);
480 int in_gid(gid_t gid);
481 int in_group(const char *name);
483 char* uid_to_name(uid_t uid);
484 char* gid_to_name(gid_t gid);
486 int glob_exists(const char *path);
487 int glob_extend(char ***strv, const char *path);
489 int dirent_ensure_type(DIR *d, struct dirent *de);
491 int in_search_path(const char *path, char **search);
492 int get_files_in_directory(const char *path, char ***list);
494 char *strjoin(const char *x, ...) _sentinel_;
496 bool is_main_thread(void);
498 bool in_charset(const char *s, const char* charset) _pure_;
500 int block_get_whole_disk(dev_t d, dev_t *ret);
502 int file_is_priv_sticky(const char *p);
504 int strdup_or_null(const char *a, char **b);
506 #define NULSTR_FOREACH(i, l) \
507 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
509 #define NULSTR_FOREACH_PAIR(i, j, l) \
510 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
512 int ioprio_class_to_string_alloc(int i, char **s);
513 int ioprio_class_from_string(const char *s);
515 const char *sigchld_code_to_string(int i) _const_;
516 int sigchld_code_from_string(const char *s) _pure_;
518 int log_facility_unshifted_to_string_alloc(int i, char **s);
519 int log_facility_unshifted_from_string(const char *s);
521 int log_level_to_string_alloc(int i, char **s);
522 int log_level_from_string(const char *s);
524 int sched_policy_to_string_alloc(int i, char **s);
525 int sched_policy_from_string(const char *s);
527 const char *rlimit_to_string(int i) _const_;
528 int rlimit_from_string(const char *s) _pure_;
530 int ip_tos_to_string_alloc(int i, char **s);
531 int ip_tos_from_string(const char *s);
533 const char *signal_to_string(int i) _const_;
534 int signal_from_string(const char *s) _pure_;
536 int signal_from_string_try_harder(const char *s);
538 extern int saved_argc;
539 extern char **saved_argv;
541 bool kexec_loaded(void);
543 int prot_from_flags(int flags) _const_;
545 char *format_bytes(char *buf, size_t l, off_t t);
547 int fd_wait_for_event(int fd, int event, usec_t timeout);
549 void* memdup(const void *p, size_t l) _alloc_(2);
551 int is_kernel_thread(pid_t pid);
553 int fd_inc_sndbuf(int fd, size_t n);
554 int fd_inc_rcvbuf(int fd, size_t n);
556 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
558 int setrlimit_closest(int resource, const struct rlimit *rlim);
560 int getenv_for_pid(pid_t pid, const char *field, char **_value);
562 bool is_valid_documentation_url(const char *url) _pure_;
564 bool in_initrd(void);
566 void warn_melody(void);
568 int get_home_dir(char **ret);
569 int get_shell(char **_ret);
571 static inline void freep(void *p) {
575 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
576 static inline void func##p(type *p) { \
580 struct __useless_struct_to_allow_trailing_semicolon__
582 static inline void closep(int *fd) {
584 close_nointr_nofail(*fd);
587 static inline void umaskp(mode_t *u) {
591 static inline void close_pipep(int (*p)[2]) {
595 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
596 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
597 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
598 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
600 #define _cleanup_free_ _cleanup_(freep)
601 #define _cleanup_close_ _cleanup_(closep)
602 #define _cleanup_umask_ _cleanup_(umaskp)
603 #define _cleanup_globfree_ _cleanup_(globfree)
604 #define _cleanup_fclose_ _cleanup_(fclosep)
605 #define _cleanup_pclose_ _cleanup_(pclosep)
606 #define _cleanup_closedir_ _cleanup_(closedirp)
607 #define _cleanup_endmntent_ _cleanup_(endmntentp)
608 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
610 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
611 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
614 return malloc(a * b);
617 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
618 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
621 return memdup(p, a * b);
624 bool filename_is_safe(const char *p) _pure_;
625 bool path_is_safe(const char *p) _pure_;
626 bool string_is_safe(const char *p) _pure_;
627 bool string_has_cc(const char *p) _pure_;
629 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
630 int (*compar) (const void *, const void *, void *),
633 bool is_locale_utf8(void);
635 typedef enum DrawSpecialChar {
640 DRAW_TRIANGULAR_BULLET,
642 _DRAW_SPECIAL_CHAR_MAX
644 const char *draw_special_char(DrawSpecialChar ch);
646 char *strreplace(const char *text, const char *old_string, const char *new_string);
648 char *strip_tab_ansi(char **p, size_t *l);
650 int on_ac_power(void);
652 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
653 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
655 #define FOREACH_LINE(line, f, on_error) \
657 if (!fgets(line, sizeof(line), f)) { \
664 #define FOREACH_DIRENT(de, d, on_error) \
665 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
671 } else if (ignore_file((de)->d_name)) \
675 static inline void *mempset(void *s, int c, size_t n) {
677 return (uint8_t*)s + n;
680 char *hexmem(const void *p, size_t l);
681 void *unhexmem(const char *p, size_t l);
683 char *strextend(char **x, ...) _sentinel_;
684 char *strrep(const char *s, unsigned n);
686 void* greedy_realloc(void **p, size_t *allocated, size_t need);
687 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
688 #define GREEDY_REALLOC(array, allocated, need) \
689 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
690 #define GREEDY_REALLOC0(array, allocated, need) \
691 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
693 static inline void _reset_errno_(int *saved_errno) {
694 errno = *saved_errno;
697 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
699 struct _umask_struct_ {
704 static inline void _reset_umask_(struct _umask_struct_ *s) {
708 #define RUN_WITH_UMASK(mask) \
709 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
710 !_saved_umask_.quit ; \
711 _saved_umask_.quit = true)
713 static inline unsigned u64log2(uint64_t n) {
714 return (n > 1) ? __builtin_clzll(n) ^ 63U : 0;
717 static inline bool logind_running(void) {
718 return access("/run/systemd/seats/", F_OK) >= 0;
721 #define DECIMAL_STR_WIDTH(x) \
723 typeof(x) _x_ = (x); \
730 int unlink_noerrno(const char *path);
736 _new_ = alloca(_len_); \
737 (void *) memset(_new_, 0, _len_); \
740 #define strappenda(a, b) \
742 const char *_a_ = (a), *_b_ = (b); \
747 _c_ = alloca(_x_ + _y_ + 1); \
748 strcpy(stpcpy(_c_, _a_), _b_); \
752 #define procfs_file_alloca(pid, field) \
754 pid_t _pid_ = (pid); \
756 _r_ = alloca(sizeof("/proc/") -1 + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
757 sprintf(_r_, "/proc/%lu/" field, (unsigned long) _pid_); \
761 struct _locale_struct_ {
762 locale_t saved_locale;
767 static inline void _reset_locale_(struct _locale_struct_ *s) {
769 if (s->saved_locale != (locale_t) 0)
770 uselocale(s->saved_locale);
771 if (s->new_locale != (locale_t) 0)
772 freelocale(s->new_locale);
775 #define RUN_WITH_LOCALE(mask, loc) \
776 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
778 if (!_saved_locale_.quit) { \
780 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
781 if (_saved_locale_.new_locale != (locale_t) 0) \
782 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
784 !_saved_locale_.quit; }) ; \
785 _saved_locale_.quit = true)
787 bool id128_is_valid(const char *s) _pure_;
788 void parse_user_at_host(char *arg, char **user, char **host);
790 int split_pair(const char *s, const char *sep, char **l, char **r);
792 int shall_restore_state(void);
795 * Normal qsort requires base to be nonnull. Here were require
796 * that only if nmemb > 0.
798 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
799 int (*compar)(const void *, const void *)) {
802 qsort(base, nmemb, size, compar);
806 int proc_cmdline(char **ret);
808 int container_get_leader(const char *machine, pid_t *pid);
810 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
811 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
813 bool pid_valid(pid_t pid);