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, char **state);
202 char *split_quoted(const char *c, size_t *l, char **state);
204 #define FOREACH_WORD(word, length, s, state) \
205 for ((state) = NULL, (word) = split((s), &(length), WHITESPACE, &(state)); (word); (word) = split((s), &(length), WHITESPACE, &(state)))
207 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
208 for ((state) = NULL, (word) = split((s), &(length), (separator), &(state)); (word); (word) = split((s), &(length), (separator), &(state)))
210 #define FOREACH_WORD_QUOTED(word, length, s, state) \
211 for ((state) = NULL, (word) = split_quoted((s), &(length), &(state)); (word); (word) = split_quoted((s), &(length), &(state)))
213 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
214 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
216 char *strappend(const char *s, const char *suffix);
217 char *strnappend(const char *s, const char *suffix, size_t length);
219 char *replace_env(const char *format, char **env);
220 char **replace_env_argv(char **argv, char **env);
222 int readlink_malloc(const char *p, char **r);
223 int readlink_and_make_absolute(const char *p, char **r);
224 int readlink_and_canonicalize(const char *p, char **r);
226 int reset_all_signal_handlers(void);
228 char *strstrip(char *s);
229 char *delete_chars(char *s, const char *bad);
230 char *truncate_nl(char *s);
232 char *file_in_same_dir(const char *path, const char *filename);
234 int rmdir_parents(const char *path, const char *stop);
236 int get_process_comm(pid_t pid, char **name);
237 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
238 int get_process_exe(pid_t pid, char **name);
239 int get_process_uid(pid_t pid, uid_t *uid);
240 int get_process_gid(pid_t pid, gid_t *gid);
241 int get_process_capeff(pid_t pid, char **capeff);
243 char hexchar(int x) _const_;
244 int unhexchar(char c) _const_;
245 char octchar(int x) _const_;
246 int unoctchar(char c) _const_;
247 char decchar(int x) _const_;
248 int undecchar(char c) _const_;
250 char *cescape(const char *s);
251 char *cunescape(const char *s);
252 char *cunescape_length(const char *s, size_t length);
253 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
255 char *xescape(const char *s, const char *bad);
257 char *ascii_strlower(char *path);
259 bool dirent_is_file(const struct dirent *de) _pure_;
260 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
262 bool ignore_file(const char *filename) _pure_;
264 bool chars_intersect(const char *a, const char *b) _pure_;
266 int make_stdio(int fd);
267 int make_null_stdio(void);
268 int make_console_stdio(void);
270 void random_bytes(void *p, size_t n);
272 static inline uint64_t random_u64(void) {
274 random_bytes(&u, sizeof(u));
278 static inline uint32_t random_u32(void) {
280 random_bytes(&u, sizeof(u));
284 /* For basic lookup tables with strictly enumerated entries */
285 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
286 scope const char *name##_to_string(type i) { \
287 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
289 return name##_table[i]; \
291 scope type name##_from_string(const char *s) { \
294 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
295 if (name##_table[i] && \
296 streq(name##_table[i], s)) \
300 struct __useless_struct_to_allow_trailing_semicolon__
302 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
303 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
305 /* For string conversions where numbers are also acceptable */
306 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
307 int name##_to_string_alloc(type i, char **str) { \
310 if (i < 0 || i > max) \
312 if (i < (type) ELEMENTSOF(name##_table)) { \
313 s = strdup(name##_table[i]); \
317 r = asprintf(&s, "%u", i); \
324 type name##_from_string(const char *s) { \
328 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
329 if (name##_table[i] && \
330 streq(name##_table[i], s)) \
332 if (safe_atou(s, &u) >= 0 && u <= max) \
336 struct __useless_struct_to_allow_trailing_semicolon__
338 int fd_nonblock(int fd, bool nonblock);
339 int fd_cloexec(int fd, bool cloexec);
341 int close_all_fds(const int except[], unsigned n_except);
343 bool fstype_is_network(const char *fstype);
347 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
348 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
350 int reset_terminal_fd(int fd, bool switch_to_text);
351 int reset_terminal(const char *name);
353 int open_terminal(const char *name, int mode);
354 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
355 int release_terminal(void);
357 int flush_fd(int fd);
359 int ignore_signals(int sig, ...);
360 int default_signals(int sig, ...);
361 int sigaction_many(const struct sigaction *sa, ...);
363 int close_pipe(int p[]);
364 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
366 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
367 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
369 bool is_device_path(const char *path);
371 int dir_is_empty(const char *path);
372 char* dirname_malloc(const char *path);
374 void rename_process(const char name[8]);
376 void sigset_add_many(sigset_t *ss, ...);
378 bool hostname_is_set(void);
380 char* gethostname_malloc(void);
381 char* getlogname_malloc(void);
382 char* getusername_malloc(void);
384 int getttyname_malloc(int fd, char **r);
385 int getttyname_harder(int fd, char **r);
387 int get_ctty_devnr(pid_t pid, dev_t *d);
388 int get_ctty(pid_t, dev_t *_devnr, char **r);
390 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
391 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
393 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
394 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
395 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
396 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
398 int pipe_eof(int fd);
400 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
402 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
403 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
404 int status_welcome(void);
406 int fd_columns(int fd);
407 unsigned columns(void);
408 int fd_lines(int fd);
409 unsigned lines(void);
410 void columns_lines_cache_reset(int _unused_ signum);
414 static inline const char *ansi_highlight(void) {
415 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
418 static inline const char *ansi_highlight_red(void) {
419 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
422 static inline const char *ansi_highlight_green(void) {
423 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
426 static inline const char *ansi_highlight_yellow(void) {
427 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
430 static inline const char *ansi_highlight_blue(void) {
431 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
434 static inline const char *ansi_highlight_off(void) {
435 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
438 int running_in_chroot(void);
440 char *ellipsize(const char *s, size_t length, unsigned percent);
442 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
444 int touch(const char *path);
446 char *unquote(const char *s, const char *quotes);
447 char *normalize_env_assignment(const char *s);
449 int wait_for_terminate(pid_t pid, siginfo_t *status);
450 int wait_for_terminate_and_warn(const char *name, pid_t pid);
452 noreturn void freeze(void);
454 bool null_or_empty(struct stat *st) _pure_;
455 int null_or_empty_path(const char *fn);
457 DIR *xopendirat(int dirfd, const char *name, int flags);
459 char *fstab_node_to_udev_node(const char *p);
461 char *resolve_dev_console(char **active);
462 bool tty_is_vc(const char *tty);
463 bool tty_is_vc_resolve(const char *tty);
464 bool tty_is_console(const char *tty) _pure_;
465 int vtnr_from_tty(const char *tty);
466 const char *default_term_for_tty(const char *tty);
468 void execute_directory(const char *directory, DIR *_d, char *argv[]);
470 int kill_and_sigcont(pid_t pid, int sig);
472 bool nulstr_contains(const char*nulstr, const char *needle);
474 bool plymouth_running(void);
476 bool hostname_is_valid(const char *s) _pure_;
477 char* hostname_cleanup(char *s, bool lowercase);
479 char* strshorten(char *s, size_t l);
481 int terminal_vhangup_fd(int fd);
482 int terminal_vhangup(const char *name);
484 int vt_disallocate(const char *name);
486 int copy_file(const char *from, const char *to, int flags);
488 int symlink_atomic(const char *from, const char *to);
490 int fchmod_umask(int fd, mode_t mode);
492 bool display_is_local(const char *display) _pure_;
493 int socket_from_display(const char *display, char **path);
495 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
496 int get_group_creds(const char **groupname, gid_t *gid);
498 int in_gid(gid_t gid);
499 int in_group(const char *name);
501 char* uid_to_name(uid_t uid);
502 char* gid_to_name(gid_t gid);
504 int glob_exists(const char *path);
505 int glob_extend(char ***strv, const char *path);
507 int dirent_ensure_type(DIR *d, struct dirent *de);
509 int in_search_path(const char *path, char **search);
510 int get_files_in_directory(const char *path, char ***list);
512 char *strjoin(const char *x, ...) _sentinel_;
514 bool is_main_thread(void);
516 bool in_charset(const char *s, const char* charset) _pure_;
518 int block_get_whole_disk(dev_t d, dev_t *ret);
520 int file_is_priv_sticky(const char *p);
522 int strdup_or_null(const char *a, char **b);
524 #define NULSTR_FOREACH(i, l) \
525 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
527 #define NULSTR_FOREACH_PAIR(i, j, l) \
528 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
530 int ioprio_class_to_string_alloc(int i, char **s);
531 int ioprio_class_from_string(const char *s);
533 const char *sigchld_code_to_string(int i) _const_;
534 int sigchld_code_from_string(const char *s) _pure_;
536 int log_facility_unshifted_to_string_alloc(int i, char **s);
537 int log_facility_unshifted_from_string(const char *s);
539 int log_level_to_string_alloc(int i, char **s);
540 int log_level_from_string(const char *s);
542 int sched_policy_to_string_alloc(int i, char **s);
543 int sched_policy_from_string(const char *s);
545 const char *rlimit_to_string(int i) _const_;
546 int rlimit_from_string(const char *s) _pure_;
548 int ip_tos_to_string_alloc(int i, char **s);
549 int ip_tos_from_string(const char *s);
551 const char *signal_to_string(int i) _const_;
552 int signal_from_string(const char *s) _pure_;
554 int signal_from_string_try_harder(const char *s);
556 extern int saved_argc;
557 extern char **saved_argv;
559 bool kexec_loaded(void);
561 int prot_from_flags(int flags) _const_;
563 char *format_bytes(char *buf, size_t l, off_t t);
565 int fd_wait_for_event(int fd, int event, usec_t timeout);
567 void* memdup(const void *p, size_t l) _alloc_(2);
569 int is_kernel_thread(pid_t pid);
571 int fd_inc_sndbuf(int fd, size_t n);
572 int fd_inc_rcvbuf(int fd, size_t n);
574 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
576 int setrlimit_closest(int resource, const struct rlimit *rlim);
578 int getenv_for_pid(pid_t pid, const char *field, char **_value);
580 bool is_valid_documentation_url(const char *url) _pure_;
582 bool in_initrd(void);
584 void warn_melody(void);
586 int get_home_dir(char **ret);
587 int get_shell(char **_ret);
589 static inline void freep(void *p) {
593 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
594 static inline void func##p(type *p) { \
598 struct __useless_struct_to_allow_trailing_semicolon__
600 static inline void closep(int *fd) {
602 close_nointr_nofail(*fd);
605 static inline void umaskp(mode_t *u) {
609 static inline void close_pipep(int (*p)[2]) {
613 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
614 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
615 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
616 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
618 #define _cleanup_free_ _cleanup_(freep)
619 #define _cleanup_close_ _cleanup_(closep)
620 #define _cleanup_umask_ _cleanup_(umaskp)
621 #define _cleanup_globfree_ _cleanup_(globfree)
622 #define _cleanup_fclose_ _cleanup_(fclosep)
623 #define _cleanup_pclose_ _cleanup_(pclosep)
624 #define _cleanup_closedir_ _cleanup_(closedirp)
625 #define _cleanup_endmntent_ _cleanup_(endmntentp)
626 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
628 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
629 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
632 return malloc(a * b);
635 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
636 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
639 return memdup(p, a * b);
642 bool filename_is_safe(const char *p) _pure_;
643 bool path_is_safe(const char *p) _pure_;
644 bool string_is_safe(const char *p) _pure_;
645 bool string_has_cc(const char *p) _pure_;
648 * Check if a string contains any glob patterns.
650 _pure_ static inline bool string_is_glob(const char *p) {
651 return !!strpbrk(p, GLOB_CHARS);
654 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
655 int (*compar) (const void *, const void *, void *),
658 bool is_locale_utf8(void);
660 typedef enum DrawSpecialChar {
665 DRAW_TRIANGULAR_BULLET,
667 _DRAW_SPECIAL_CHAR_MAX
669 const char *draw_special_char(DrawSpecialChar ch);
671 char *strreplace(const char *text, const char *old_string, const char *new_string);
673 char *strip_tab_ansi(char **p, size_t *l);
675 int on_ac_power(void);
677 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
678 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
680 #define FOREACH_LINE(line, f, on_error) \
682 if (!fgets(line, sizeof(line), f)) { \
689 #define FOREACH_DIRENT(de, d, on_error) \
690 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
696 } else if (ignore_file((de)->d_name)) \
700 static inline void *mempset(void *s, int c, size_t n) {
702 return (uint8_t*)s + n;
705 char *hexmem(const void *p, size_t l);
706 void *unhexmem(const char *p, size_t l);
708 char *strextend(char **x, ...) _sentinel_;
709 char *strrep(const char *s, unsigned n);
711 void* greedy_realloc(void **p, size_t *allocated, size_t need);
712 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
713 #define GREEDY_REALLOC(array, allocated, need) \
714 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
715 #define GREEDY_REALLOC0(array, allocated, need) \
716 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
718 static inline void _reset_errno_(int *saved_errno) {
719 errno = *saved_errno;
722 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
724 struct _umask_struct_ {
729 static inline void _reset_umask_(struct _umask_struct_ *s) {
733 #define RUN_WITH_UMASK(mask) \
734 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
735 !_saved_umask_.quit ; \
736 _saved_umask_.quit = true)
738 static inline unsigned u64log2(uint64_t n) {
739 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
742 static inline bool logind_running(void) {
743 return access("/run/systemd/seats/", F_OK) >= 0;
746 #define DECIMAL_STR_WIDTH(x) \
748 typeof(x) _x_ = (x); \
755 int unlink_noerrno(const char *path);
761 _new_ = alloca(_len_); \
762 (void *) memset(_new_, 0, _len_); \
765 #define strappenda(a, b) \
767 const char *_a_ = (a), *_b_ = (b); \
772 _c_ = alloca(_x_ + _y_ + 1); \
773 strcpy(stpcpy(_c_, _a_), _b_); \
777 #define procfs_file_alloca(pid, field) \
779 pid_t _pid_ = (pid); \
781 _r_ = alloca(sizeof("/proc/") -1 + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
782 sprintf(_r_, "/proc/"PID_FMT"/" field, _pid_); \
786 struct _locale_struct_ {
787 locale_t saved_locale;
792 static inline void _reset_locale_(struct _locale_struct_ *s) {
794 if (s->saved_locale != (locale_t) 0)
795 uselocale(s->saved_locale);
796 if (s->new_locale != (locale_t) 0)
797 freelocale(s->new_locale);
800 #define RUN_WITH_LOCALE(mask, loc) \
801 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
803 if (!_saved_locale_.quit) { \
805 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
806 if (_saved_locale_.new_locale != (locale_t) 0) \
807 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
809 !_saved_locale_.quit; }) ; \
810 _saved_locale_.quit = true)
812 bool id128_is_valid(const char *s) _pure_;
813 void parse_user_at_host(char *arg, char **user, char **host);
815 int split_pair(const char *s, const char *sep, char **l, char **r);
817 int shall_restore_state(void);
820 * Normal qsort requires base to be nonnull. Here were require
821 * that only if nmemb > 0.
823 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
824 int (*compar)(const void *, const void *)) {
827 qsort(base, nmemb, size, compar);
831 int proc_cmdline(char **ret);
833 int container_get_leader(const char *machine, pid_t *pid);
835 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
836 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
838 bool pid_valid(pid_t pid);
840 int getpeercred(int fd, struct ucred *ucred);
841 int getpeersec(int fd, char **ret);