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 #include "time-util.h"
48 /* What is interpreted as whitespace? */
49 #define WHITESPACE " \t\n\r"
50 #define NEWLINE "\n\r"
53 #define GLOB_CHARS "*?["
55 #define FORMAT_BYTES_MAX 8
57 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
58 #define ANSI_RED_ON "\x1B[31m"
59 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
60 #define ANSI_GREEN_ON "\x1B[32m"
61 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
62 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
63 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
64 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
65 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
67 size_t page_size(void);
68 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
70 #define streq(a,b) (strcmp((a),(b)) == 0)
71 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
72 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
73 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
75 bool streq_ptr(const char *a, const char *b) _pure_;
77 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
79 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
81 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
83 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
85 #define malloc0(n) (calloc((n), 1))
87 static inline const char* yes_no(bool b) {
88 return b ? "yes" : "no";
91 static inline const char* true_false(bool b) {
92 return b ? "true" : "false";
95 static inline const char* strempty(const char *s) {
99 static inline const char* strnull(const char *s) {
100 return s ? s : "(null)";
103 static inline const char *strna(const char *s) {
104 return s ? s : "n/a";
107 static inline bool isempty(const char *p) {
111 static inline const char *startswith(const char *s, const char *prefix) {
112 if (strncmp(s, prefix, strlen(prefix)) == 0)
113 return s + strlen(prefix);
117 static inline const char *startswith_no_case(const char *s, const char *prefix) {
118 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
119 return s + strlen(prefix);
123 char *endswith(const char *s, const char *postfix) _pure_;
125 bool first_word(const char *s, const char *word) _pure_;
127 int close_nointr(int fd);
128 void close_nointr_nofail(int fd);
129 void close_many(const int fds[], unsigned n_fd);
131 int parse_boolean(const char *v) _pure_;
132 int parse_bytes(const char *t, off_t *bytes);
133 int parse_pid(const char *s, pid_t* ret_pid);
134 int parse_uid(const char *s, uid_t* ret_uid);
135 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
137 int safe_atou(const char *s, unsigned *ret_u);
138 int safe_atoi(const char *s, int *ret_i);
140 int safe_atollu(const char *s, unsigned long long *ret_u);
141 int safe_atolli(const char *s, long long int *ret_i);
143 int safe_atod(const char *s, double *ret_d);
146 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
147 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
148 return safe_atou(s, (unsigned*) ret_u);
150 static inline int safe_atoli(const char *s, long int *ret_u) {
151 assert_cc(sizeof(long int) == sizeof(int));
152 return safe_atoi(s, (int*) ret_u);
155 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
156 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
157 return safe_atollu(s, (unsigned long long*) ret_u);
159 static inline int safe_atoli(const char *s, long int *ret_u) {
160 assert_cc(sizeof(long int) == sizeof(long long int));
161 return safe_atolli(s, (long long int*) ret_u);
165 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
166 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
167 return safe_atou(s, (unsigned*) ret_u);
170 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
171 assert_cc(sizeof(int32_t) == sizeof(int));
172 return safe_atoi(s, (int*) ret_i);
175 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
176 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
177 return safe_atollu(s, (unsigned long long*) ret_u);
180 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
181 assert_cc(sizeof(int64_t) == sizeof(long long int));
182 return safe_atolli(s, (long long int*) ret_i);
185 char *split(const char *c, size_t *l, const char *separator, char **state);
186 char *split_quoted(const char *c, size_t *l, char **state);
188 #define FOREACH_WORD(word, length, s, state) \
189 for ((state) = NULL, (word) = split((s), &(length), WHITESPACE, &(state)); (word); (word) = split((s), &(length), WHITESPACE, &(state)))
191 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
192 for ((state) = NULL, (word) = split((s), &(length), (separator), &(state)); (word); (word) = split((s), &(length), (separator), &(state)))
194 #define FOREACH_WORD_QUOTED(word, length, s, state) \
195 for ((state) = NULL, (word) = split_quoted((s), &(length), &(state)); (word); (word) = split_quoted((s), &(length), &(state)))
197 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
198 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
200 char *strappend(const char *s, const char *suffix);
201 char *strnappend(const char *s, const char *suffix, size_t length);
203 char *replace_env(const char *format, char **env);
204 char **replace_env_argv(char **argv, char **env);
206 int readlink_malloc(const char *p, char **r);
207 int readlink_and_make_absolute(const char *p, char **r);
208 int readlink_and_canonicalize(const char *p, char **r);
210 int reset_all_signal_handlers(void);
212 char *strstrip(char *s);
213 char *delete_chars(char *s, const char *bad);
214 char *truncate_nl(char *s);
216 char *file_in_same_dir(const char *path, const char *filename);
218 int rmdir_parents(const char *path, const char *stop);
220 int get_process_comm(pid_t pid, char **name);
221 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
222 int get_process_exe(pid_t pid, char **name);
223 int get_process_uid(pid_t pid, uid_t *uid);
224 int get_process_gid(pid_t pid, gid_t *gid);
225 int get_process_capeff(pid_t pid, char **capeff);
227 char hexchar(int x) _const_;
228 int unhexchar(char c) _const_;
229 char octchar(int x) _const_;
230 int unoctchar(char c) _const_;
231 char decchar(int x) _const_;
232 int undecchar(char c) _const_;
234 char *cescape(const char *s);
235 char *cunescape(const char *s);
236 char *cunescape_length(const char *s, size_t length);
237 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
239 char *xescape(const char *s, const char *bad);
241 char *ascii_strlower(char *path);
243 bool dirent_is_file(const struct dirent *de) _pure_;
244 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
246 bool ignore_file(const char *filename) _pure_;
248 bool chars_intersect(const char *a, const char *b) _pure_;
250 int make_stdio(int fd);
251 int make_null_stdio(void);
252 int make_console_stdio(void);
254 void random_bytes(void *p, size_t n);
256 static inline uint64_t random_u64(void) {
258 random_bytes(&u, sizeof(u));
262 static inline uint32_t random_u32(void) {
264 random_bytes(&u, sizeof(u));
268 /* For basic lookup tables with strictly enumerated entries */
269 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
270 scope const char *name##_to_string(type i) { \
271 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
273 return name##_table[i]; \
275 scope type name##_from_string(const char *s) { \
278 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
279 if (name##_table[i] && \
280 streq(name##_table[i], s)) \
284 struct __useless_struct_to_allow_trailing_semicolon__
286 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
287 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
289 /* For string conversions where numbers are also acceptable */
290 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
291 int name##_to_string_alloc(type i, char **str) { \
294 if (i < 0 || i > max) \
296 if (i < (type) ELEMENTSOF(name##_table)) { \
297 s = strdup(name##_table[i]); \
301 r = asprintf(&s, "%u", i); \
308 type name##_from_string(const char *s) { \
312 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
313 if (name##_table[i] && \
314 streq(name##_table[i], s)) \
316 if (safe_atou(s, &u) >= 0 && u <= max) \
320 struct __useless_struct_to_allow_trailing_semicolon__
322 int fd_nonblock(int fd, bool nonblock);
323 int fd_cloexec(int fd, bool cloexec);
325 int close_all_fds(const int except[], unsigned n_except);
327 bool fstype_is_network(const char *fstype);
331 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
332 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
334 int reset_terminal_fd(int fd, bool switch_to_text);
335 int reset_terminal(const char *name);
337 int open_terminal(const char *name, int mode);
338 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
339 int release_terminal(void);
341 int flush_fd(int fd);
343 int ignore_signals(int sig, ...);
344 int default_signals(int sig, ...);
345 int sigaction_many(const struct sigaction *sa, ...);
347 int close_pipe(int p[]);
348 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
350 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
351 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
353 bool is_device_path(const char *path);
355 int dir_is_empty(const char *path);
356 char* dirname_malloc(const char *path);
358 void rename_process(const char name[8]);
360 void sigset_add_many(sigset_t *ss, ...);
362 bool hostname_is_set(void);
364 char* gethostname_malloc(void);
365 char* getlogname_malloc(void);
366 char* getusername_malloc(void);
368 int getttyname_malloc(int fd, char **r);
369 int getttyname_harder(int fd, char **r);
371 int get_ctty_devnr(pid_t pid, dev_t *d);
372 int get_ctty(pid_t, dev_t *_devnr, char **r);
374 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
375 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
377 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
378 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
379 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
380 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
382 int pipe_eof(int fd);
384 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
386 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
387 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
388 int status_welcome(void);
390 int fd_columns(int fd);
391 unsigned columns(void);
392 int fd_lines(int fd);
393 unsigned lines(void);
394 void columns_lines_cache_reset(int _unused_ signum);
398 static inline const char *ansi_highlight(void) {
399 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
402 static inline const char *ansi_highlight_red(void) {
403 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
406 static inline const char *ansi_highlight_green(void) {
407 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
410 static inline const char *ansi_highlight_yellow(void) {
411 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
414 static inline const char *ansi_highlight_blue(void) {
415 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
418 static inline const char *ansi_highlight_off(void) {
419 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
422 int running_in_chroot(void);
424 char *ellipsize(const char *s, size_t length, unsigned percent);
426 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
428 int touch(const char *path);
430 char *unquote(const char *s, const char *quotes);
431 char *normalize_env_assignment(const char *s);
433 int wait_for_terminate(pid_t pid, siginfo_t *status);
434 int wait_for_terminate_and_warn(const char *name, pid_t pid);
436 noreturn void freeze(void);
438 bool null_or_empty(struct stat *st) _pure_;
439 int null_or_empty_path(const char *fn);
441 DIR *xopendirat(int dirfd, const char *name, int flags);
443 char *fstab_node_to_udev_node(const char *p);
445 char *resolve_dev_console(char **active);
446 bool tty_is_vc(const char *tty);
447 bool tty_is_vc_resolve(const char *tty);
448 bool tty_is_console(const char *tty) _pure_;
449 int vtnr_from_tty(const char *tty);
450 const char *default_term_for_tty(const char *tty);
452 void execute_directory(const char *directory, DIR *_d, char *argv[]);
454 int kill_and_sigcont(pid_t pid, int sig);
456 bool nulstr_contains(const char*nulstr, const char *needle);
458 bool plymouth_running(void);
460 bool hostname_is_valid(const char *s) _pure_;
461 char* hostname_cleanup(char *s, bool lowercase);
463 char* strshorten(char *s, size_t l);
465 int terminal_vhangup_fd(int fd);
466 int terminal_vhangup(const char *name);
468 int vt_disallocate(const char *name);
470 int copy_file(const char *from, const char *to, int flags);
472 int symlink_atomic(const char *from, const char *to);
474 int fchmod_umask(int fd, mode_t mode);
476 bool display_is_local(const char *display) _pure_;
477 int socket_from_display(const char *display, char **path);
479 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
480 int get_group_creds(const char **groupname, gid_t *gid);
482 int in_gid(gid_t gid);
483 int in_group(const char *name);
485 char* uid_to_name(uid_t uid);
486 char* gid_to_name(gid_t gid);
488 int glob_exists(const char *path);
489 int glob_extend(char ***strv, const char *path);
491 int dirent_ensure_type(DIR *d, struct dirent *de);
493 int in_search_path(const char *path, char **search);
494 int get_files_in_directory(const char *path, char ***list);
496 char *strjoin(const char *x, ...) _sentinel_;
498 bool is_main_thread(void);
500 bool in_charset(const char *s, const char* charset) _pure_;
502 int block_get_whole_disk(dev_t d, dev_t *ret);
504 int file_is_priv_sticky(const char *p);
506 int strdup_or_null(const char *a, char **b);
508 #define NULSTR_FOREACH(i, l) \
509 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
511 #define NULSTR_FOREACH_PAIR(i, j, l) \
512 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
514 int ioprio_class_to_string_alloc(int i, char **s);
515 int ioprio_class_from_string(const char *s);
517 const char *sigchld_code_to_string(int i) _const_;
518 int sigchld_code_from_string(const char *s) _pure_;
520 int log_facility_unshifted_to_string_alloc(int i, char **s);
521 int log_facility_unshifted_from_string(const char *s);
523 int log_level_to_string_alloc(int i, char **s);
524 int log_level_from_string(const char *s);
526 int sched_policy_to_string_alloc(int i, char **s);
527 int sched_policy_from_string(const char *s);
529 const char *rlimit_to_string(int i) _const_;
530 int rlimit_from_string(const char *s) _pure_;
532 int ip_tos_to_string_alloc(int i, char **s);
533 int ip_tos_from_string(const char *s);
535 const char *signal_to_string(int i) _const_;
536 int signal_from_string(const char *s) _pure_;
538 int signal_from_string_try_harder(const char *s);
540 extern int saved_argc;
541 extern char **saved_argv;
543 bool kexec_loaded(void);
545 int prot_from_flags(int flags) _const_;
547 char *format_bytes(char *buf, size_t l, off_t t);
549 int fd_wait_for_event(int fd, int event, usec_t timeout);
551 void* memdup(const void *p, size_t l) _alloc_(2);
553 int is_kernel_thread(pid_t pid);
555 int fd_inc_sndbuf(int fd, size_t n);
556 int fd_inc_rcvbuf(int fd, size_t n);
558 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
560 int setrlimit_closest(int resource, const struct rlimit *rlim);
562 int getenv_for_pid(pid_t pid, const char *field, char **_value);
564 bool is_valid_documentation_url(const char *url) _pure_;
566 bool in_initrd(void);
568 void warn_melody(void);
570 int get_home_dir(char **ret);
571 int get_shell(char **_ret);
573 static inline void freep(void *p) {
577 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
578 static inline void func##p(type *p) { \
582 struct __useless_struct_to_allow_trailing_semicolon__
584 static inline void closep(int *fd) {
586 close_nointr_nofail(*fd);
589 static inline void umaskp(mode_t *u) {
593 static inline void close_pipep(int (*p)[2]) {
597 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
598 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
599 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
600 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
602 #define _cleanup_free_ _cleanup_(freep)
603 #define _cleanup_close_ _cleanup_(closep)
604 #define _cleanup_umask_ _cleanup_(umaskp)
605 #define _cleanup_globfree_ _cleanup_(globfree)
606 #define _cleanup_fclose_ _cleanup_(fclosep)
607 #define _cleanup_pclose_ _cleanup_(pclosep)
608 #define _cleanup_closedir_ _cleanup_(closedirp)
609 #define _cleanup_endmntent_ _cleanup_(endmntentp)
610 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
612 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
613 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
616 return malloc(a * b);
619 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
620 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
623 return memdup(p, a * b);
626 bool filename_is_safe(const char *p) _pure_;
627 bool path_is_safe(const char *p) _pure_;
628 bool string_is_safe(const char *p) _pure_;
629 bool string_has_cc(const char *p) _pure_;
632 * Check if a string contains any glob patterns.
634 _pure_ static inline bool string_is_glob(const char *p) {
635 return !!strpbrk(p, GLOB_CHARS);
638 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
639 int (*compar) (const void *, const void *, void *),
642 bool is_locale_utf8(void);
644 typedef enum DrawSpecialChar {
649 DRAW_TRIANGULAR_BULLET,
651 _DRAW_SPECIAL_CHAR_MAX
653 const char *draw_special_char(DrawSpecialChar ch);
655 char *strreplace(const char *text, const char *old_string, const char *new_string);
657 char *strip_tab_ansi(char **p, size_t *l);
659 int on_ac_power(void);
661 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
662 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
664 #define FOREACH_LINE(line, f, on_error) \
666 if (!fgets(line, sizeof(line), f)) { \
673 #define FOREACH_DIRENT(de, d, on_error) \
674 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
680 } else if (ignore_file((de)->d_name)) \
684 static inline void *mempset(void *s, int c, size_t n) {
686 return (uint8_t*)s + n;
689 char *hexmem(const void *p, size_t l);
690 void *unhexmem(const char *p, size_t l);
692 char *strextend(char **x, ...) _sentinel_;
693 char *strrep(const char *s, unsigned n);
695 void* greedy_realloc(void **p, size_t *allocated, size_t need);
696 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
697 #define GREEDY_REALLOC(array, allocated, need) \
698 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
699 #define GREEDY_REALLOC0(array, allocated, need) \
700 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
702 static inline void _reset_errno_(int *saved_errno) {
703 errno = *saved_errno;
706 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
708 struct _umask_struct_ {
713 static inline void _reset_umask_(struct _umask_struct_ *s) {
717 #define RUN_WITH_UMASK(mask) \
718 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
719 !_saved_umask_.quit ; \
720 _saved_umask_.quit = true)
722 static inline unsigned u64log2(uint64_t n) {
723 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
726 static inline bool logind_running(void) {
727 return access("/run/systemd/seats/", F_OK) >= 0;
730 #define DECIMAL_STR_WIDTH(x) \
732 typeof(x) _x_ = (x); \
739 int unlink_noerrno(const char *path);
745 _new_ = alloca(_len_); \
746 (void *) memset(_new_, 0, _len_); \
749 #define strappenda(a, b) \
751 const char *_a_ = (a), *_b_ = (b); \
756 _c_ = alloca(_x_ + _y_ + 1); \
757 strcpy(stpcpy(_c_, _a_), _b_); \
761 #define procfs_file_alloca(pid, field) \
763 pid_t _pid_ = (pid); \
765 _r_ = alloca(sizeof("/proc/") -1 + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
766 sprintf(_r_, "/proc/%lu/" field, (unsigned long) _pid_); \
770 struct _locale_struct_ {
771 locale_t saved_locale;
776 static inline void _reset_locale_(struct _locale_struct_ *s) {
778 if (s->saved_locale != (locale_t) 0)
779 uselocale(s->saved_locale);
780 if (s->new_locale != (locale_t) 0)
781 freelocale(s->new_locale);
784 #define RUN_WITH_LOCALE(mask, loc) \
785 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
787 if (!_saved_locale_.quit) { \
789 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
790 if (_saved_locale_.new_locale != (locale_t) 0) \
791 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
793 !_saved_locale_.quit; }) ; \
794 _saved_locale_.quit = true)
796 bool id128_is_valid(const char *s) _pure_;
797 void parse_user_at_host(char *arg, char **user, char **host);
799 int split_pair(const char *s, const char *sep, char **l, char **r);
801 int shall_restore_state(void);
804 * Normal qsort requires base to be nonnull. Here were require
805 * that only if nmemb > 0.
807 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
808 int (*compar)(const void *, const void *)) {
811 qsort(base, nmemb, size, compar);
815 int proc_cmdline(char **ret);
817 int container_get_leader(const char *machine, pid_t *pid);
819 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
820 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
822 bool pid_valid(pid_t pid);
824 int getpeercred(int fd, struct ucred *ucred);
825 int getpeersec(int fd, char **ret);