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 # define GID_FMT "%" PRIu32
63 #elif SIZEOF_GID_T == 2
64 # define GID_FMT "%" PRIu16
66 # error Unknown gid_t size
70 #include "time-util.h"
72 /* What is interpreted as whitespace? */
73 #define WHITESPACE " \t\n\r"
74 #define NEWLINE "\n\r"
77 #define GLOB_CHARS "*?["
79 #define FORMAT_BYTES_MAX 8
81 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
82 #define ANSI_RED_ON "\x1B[31m"
83 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
84 #define ANSI_GREEN_ON "\x1B[32m"
85 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
86 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
87 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
88 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
89 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
91 size_t page_size(void);
92 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
94 #define streq(a,b) (strcmp((a),(b)) == 0)
95 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
96 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
97 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
99 bool streq_ptr(const char *a, const char *b) _pure_;
101 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
103 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
105 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
107 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
109 #define malloc0(n) (calloc((n), 1))
111 static inline const char* yes_no(bool b) {
112 return b ? "yes" : "no";
115 static inline const char* true_false(bool b) {
116 return b ? "true" : "false";
119 static inline const char* strempty(const char *s) {
123 static inline const char* strnull(const char *s) {
124 return s ? s : "(null)";
127 static inline const char *strna(const char *s) {
128 return s ? s : "n/a";
131 static inline bool isempty(const char *p) {
135 static inline const char *startswith(const char *s, const char *prefix) {
136 if (strncmp(s, prefix, strlen(prefix)) == 0)
137 return s + strlen(prefix);
141 static inline const char *startswith_no_case(const char *s, const char *prefix) {
142 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
143 return s + strlen(prefix);
147 char *endswith(const char *s, const char *postfix) _pure_;
149 bool first_word(const char *s, const char *word) _pure_;
151 int close_nointr(int fd);
152 void close_nointr_nofail(int fd);
153 void close_many(const int fds[], unsigned n_fd);
155 int parse_size(const char *t, off_t base, off_t *size);
157 int parse_boolean(const char *v) _pure_;
158 int parse_pid(const char *s, pid_t* ret_pid);
159 int parse_uid(const char *s, uid_t* ret_uid);
160 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
162 int safe_atou(const char *s, unsigned *ret_u);
163 int safe_atoi(const char *s, int *ret_i);
165 int safe_atollu(const char *s, unsigned long long *ret_u);
166 int safe_atolli(const char *s, long long int *ret_i);
168 int safe_atod(const char *s, double *ret_d);
171 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
172 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
173 return safe_atou(s, (unsigned*) ret_u);
175 static inline int safe_atoli(const char *s, long int *ret_u) {
176 assert_cc(sizeof(long int) == sizeof(int));
177 return safe_atoi(s, (int*) ret_u);
180 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
181 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
182 return safe_atollu(s, (unsigned long long*) ret_u);
184 static inline int safe_atoli(const char *s, long int *ret_u) {
185 assert_cc(sizeof(long int) == sizeof(long long int));
186 return safe_atolli(s, (long long int*) ret_u);
190 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
191 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
192 return safe_atou(s, (unsigned*) ret_u);
195 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
196 assert_cc(sizeof(int32_t) == sizeof(int));
197 return safe_atoi(s, (int*) ret_i);
200 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
201 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
202 return safe_atollu(s, (unsigned long long*) ret_u);
205 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
206 assert_cc(sizeof(int64_t) == sizeof(long long int));
207 return safe_atolli(s, (long long int*) ret_i);
210 char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state);
212 #define FOREACH_WORD(word, length, s, state) \
213 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
215 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
216 _FOREACH_WORD(word, length, s, separator, false, state)
218 #define FOREACH_WORD_QUOTED(word, length, s, state) \
219 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
221 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
222 _FOREACH_WORD(word, length, s, separator, true, state)
224 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
225 for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state)))
227 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
228 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
230 char *strappend(const char *s, const char *suffix);
231 char *strnappend(const char *s, const char *suffix, size_t length);
233 char *replace_env(const char *format, char **env);
234 char **replace_env_argv(char **argv, char **env);
236 int readlink_malloc(const char *p, char **r);
237 int readlink_and_make_absolute(const char *p, char **r);
238 int readlink_and_canonicalize(const char *p, char **r);
240 int reset_all_signal_handlers(void);
242 char *strstrip(char *s);
243 char *delete_chars(char *s, const char *bad);
244 char *truncate_nl(char *s);
246 char *file_in_same_dir(const char *path, const char *filename);
248 int rmdir_parents(const char *path, const char *stop);
250 int get_process_state(pid_t pid);
251 int get_process_comm(pid_t pid, char **name);
252 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
253 int get_process_exe(pid_t pid, char **name);
254 int get_process_uid(pid_t pid, uid_t *uid);
255 int get_process_gid(pid_t pid, gid_t *gid);
256 int get_process_capeff(pid_t pid, char **capeff);
258 char hexchar(int x) _const_;
259 int unhexchar(char c) _const_;
260 char octchar(int x) _const_;
261 int unoctchar(char c) _const_;
262 char decchar(int x) _const_;
263 int undecchar(char c) _const_;
265 char *cescape(const char *s);
266 char *cunescape(const char *s);
267 char *cunescape_length(const char *s, size_t length);
268 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
270 char *xescape(const char *s, const char *bad);
272 char *ascii_strlower(char *path);
274 bool dirent_is_file(const struct dirent *de) _pure_;
275 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
277 bool ignore_file(const char *filename) _pure_;
279 bool chars_intersect(const char *a, const char *b) _pure_;
281 int make_stdio(int fd);
282 int make_null_stdio(void);
283 int make_console_stdio(void);
285 int dev_urandom(void *p, size_t n);
286 void random_bytes(void *p, size_t n);
288 static inline uint64_t random_u64(void) {
290 random_bytes(&u, sizeof(u));
294 static inline uint32_t random_u32(void) {
296 random_bytes(&u, sizeof(u));
300 /* For basic lookup tables with strictly enumerated entries */
301 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
302 scope const char *name##_to_string(type i) { \
303 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
305 return name##_table[i]; \
307 scope type name##_from_string(const char *s) { \
311 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
312 if (name##_table[i] && \
313 streq(name##_table[i], s)) \
317 struct __useless_struct_to_allow_trailing_semicolon__
319 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
320 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
322 /* For string conversions where numbers are also acceptable */
323 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
324 int name##_to_string_alloc(type i, char **str) { \
327 if (i < 0 || i > max) \
329 if (i < (type) ELEMENTSOF(name##_table)) { \
330 s = strdup(name##_table[i]); \
334 r = asprintf(&s, "%u", i); \
341 type name##_from_string(const char *s) { \
345 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
346 if (name##_table[i] && \
347 streq(name##_table[i], s)) \
349 if (safe_atou(s, &u) >= 0 && u <= max) \
353 struct __useless_struct_to_allow_trailing_semicolon__
355 int fd_nonblock(int fd, bool nonblock);
356 int fd_cloexec(int fd, bool cloexec);
358 int close_all_fds(const int except[], unsigned n_except);
360 bool fstype_is_network(const char *fstype);
364 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
365 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
367 int reset_terminal_fd(int fd, bool switch_to_text);
368 int reset_terminal(const char *name);
370 int open_terminal(const char *name, int mode);
371 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
372 int release_terminal(void);
374 int flush_fd(int fd);
376 int ignore_signals(int sig, ...);
377 int default_signals(int sig, ...);
378 int sigaction_many(const struct sigaction *sa, ...);
380 int close_pipe(int p[]);
381 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
383 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
384 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
386 bool is_device_path(const char *path);
388 int dir_is_empty(const char *path);
389 char* dirname_malloc(const char *path);
391 void rename_process(const char name[8]);
393 void sigset_add_many(sigset_t *ss, ...);
395 bool hostname_is_set(void);
397 char* gethostname_malloc(void);
398 char* getlogname_malloc(void);
399 char* getusername_malloc(void);
401 int getttyname_malloc(int fd, char **r);
402 int getttyname_harder(int fd, char **r);
404 int get_ctty_devnr(pid_t pid, dev_t *d);
405 int get_ctty(pid_t, dev_t *_devnr, char **r);
407 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
408 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
410 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
411 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
412 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
413 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
415 int pipe_eof(int fd);
417 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
419 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
420 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
422 int fd_columns(int fd);
423 unsigned columns(void);
424 int fd_lines(int fd);
425 unsigned lines(void);
426 void columns_lines_cache_reset(int _unused_ signum);
430 static inline const char *ansi_highlight(void) {
431 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
434 static inline const char *ansi_highlight_red(void) {
435 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
438 static inline const char *ansi_highlight_green(void) {
439 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
442 static inline const char *ansi_highlight_yellow(void) {
443 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
446 static inline const char *ansi_highlight_blue(void) {
447 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
450 static inline const char *ansi_highlight_off(void) {
451 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
454 int files_same(const char *filea, const char *fileb);
456 int running_in_chroot(void);
458 char *ellipsize(const char *s, size_t length, unsigned percent);
460 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
462 int touch(const char *path);
464 char *unquote(const char *s, const char *quotes);
465 char *normalize_env_assignment(const char *s);
467 int wait_for_terminate(pid_t pid, siginfo_t *status);
468 int wait_for_terminate_and_warn(const char *name, pid_t pid);
470 noreturn void freeze(void);
472 bool null_or_empty(struct stat *st) _pure_;
473 int null_or_empty_path(const char *fn);
475 DIR *xopendirat(int dirfd, const char *name, int flags);
477 char *fstab_node_to_udev_node(const char *p);
479 char *resolve_dev_console(char **active);
480 bool tty_is_vc(const char *tty);
481 bool tty_is_vc_resolve(const char *tty);
482 bool tty_is_console(const char *tty) _pure_;
483 int vtnr_from_tty(const char *tty);
484 const char *default_term_for_tty(const char *tty);
486 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
488 int kill_and_sigcont(pid_t pid, int sig);
490 bool nulstr_contains(const char*nulstr, const char *needle);
492 bool plymouth_running(void);
494 bool hostname_is_valid(const char *s) _pure_;
495 char* hostname_cleanup(char *s, bool lowercase);
497 char* strshorten(char *s, size_t l);
499 int terminal_vhangup_fd(int fd);
500 int terminal_vhangup(const char *name);
502 int vt_disallocate(const char *name);
504 int copy_file(const char *from, const char *to, int flags);
506 int symlink_atomic(const char *from, const char *to);
508 int fchmod_umask(int fd, mode_t mode);
510 bool display_is_local(const char *display) _pure_;
511 int socket_from_display(const char *display, char **path);
513 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
514 int get_group_creds(const char **groupname, gid_t *gid);
516 int in_gid(gid_t gid);
517 int in_group(const char *name);
519 char* uid_to_name(uid_t uid);
520 char* gid_to_name(gid_t gid);
522 int glob_exists(const char *path);
523 int glob_extend(char ***strv, const char *path);
525 int dirent_ensure_type(DIR *d, struct dirent *de);
527 int in_search_path(const char *path, char **search);
528 int get_files_in_directory(const char *path, char ***list);
530 char *strjoin(const char *x, ...) _sentinel_;
532 bool is_main_thread(void);
534 static inline bool _pure_ in_charset(const char *s, const char* charset) {
537 return s[strspn(s, charset)] == '\0';
540 int block_get_whole_disk(dev_t d, dev_t *ret);
542 int file_is_priv_sticky(const char *p);
544 int strdup_or_null(const char *a, char **b);
546 #define NULSTR_FOREACH(i, l) \
547 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
549 #define NULSTR_FOREACH_PAIR(i, j, l) \
550 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
552 int ioprio_class_to_string_alloc(int i, char **s);
553 int ioprio_class_from_string(const char *s);
555 const char *sigchld_code_to_string(int i) _const_;
556 int sigchld_code_from_string(const char *s) _pure_;
558 int log_facility_unshifted_to_string_alloc(int i, char **s);
559 int log_facility_unshifted_from_string(const char *s);
561 int log_level_to_string_alloc(int i, char **s);
562 int log_level_from_string(const char *s);
564 int sched_policy_to_string_alloc(int i, char **s);
565 int sched_policy_from_string(const char *s);
567 const char *rlimit_to_string(int i) _const_;
568 int rlimit_from_string(const char *s) _pure_;
570 int ip_tos_to_string_alloc(int i, char **s);
571 int ip_tos_from_string(const char *s);
573 const char *signal_to_string(int i) _const_;
574 int signal_from_string(const char *s) _pure_;
576 int signal_from_string_try_harder(const char *s);
578 extern int saved_argc;
579 extern char **saved_argv;
581 bool kexec_loaded(void);
583 int prot_from_flags(int flags) _const_;
585 char *format_bytes(char *buf, size_t l, off_t t);
587 int fd_wait_for_event(int fd, int event, usec_t timeout);
589 void* memdup(const void *p, size_t l) _alloc_(2);
591 int is_kernel_thread(pid_t pid);
593 int fd_inc_sndbuf(int fd, size_t n);
594 int fd_inc_rcvbuf(int fd, size_t n);
596 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
598 int setrlimit_closest(int resource, const struct rlimit *rlim);
600 int getenv_for_pid(pid_t pid, const char *field, char **_value);
602 bool is_valid_documentation_url(const char *url) _pure_;
604 bool in_initrd(void);
606 void warn_melody(void);
608 int get_home_dir(char **ret);
609 int get_shell(char **_ret);
611 static inline void freep(void *p) {
615 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
616 static inline void func##p(type *p) { \
620 struct __useless_struct_to_allow_trailing_semicolon__
622 static inline void closep(int *fd) {
624 close_nointr_nofail(*fd);
627 static inline void umaskp(mode_t *u) {
631 static inline void close_pipep(int (*p)[2]) {
635 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
636 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
637 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
638 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
640 #define _cleanup_free_ _cleanup_(freep)
641 #define _cleanup_close_ _cleanup_(closep)
642 #define _cleanup_umask_ _cleanup_(umaskp)
643 #define _cleanup_globfree_ _cleanup_(globfree)
644 #define _cleanup_fclose_ _cleanup_(fclosep)
645 #define _cleanup_pclose_ _cleanup_(pclosep)
646 #define _cleanup_closedir_ _cleanup_(closedirp)
647 #define _cleanup_endmntent_ _cleanup_(endmntentp)
648 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
650 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
651 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
654 return malloc(a * b);
657 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
658 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
661 return memdup(p, a * b);
664 bool filename_is_safe(const char *p) _pure_;
665 bool path_is_safe(const char *p) _pure_;
666 bool string_is_safe(const char *p) _pure_;
667 bool string_has_cc(const char *p) _pure_;
670 * Check if a string contains any glob patterns.
672 _pure_ static inline bool string_is_glob(const char *p) {
673 return !!strpbrk(p, GLOB_CHARS);
676 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
677 int (*compar) (const void *, const void *, void *),
680 bool is_locale_utf8(void);
682 typedef enum DrawSpecialChar {
687 DRAW_TRIANGULAR_BULLET,
689 _DRAW_SPECIAL_CHAR_MAX
691 const char *draw_special_char(DrawSpecialChar ch);
693 char *strreplace(const char *text, const char *old_string, const char *new_string);
695 char *strip_tab_ansi(char **p, size_t *l);
697 int on_ac_power(void);
699 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
700 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
702 #define FOREACH_LINE(line, f, on_error) \
704 if (!fgets(line, sizeof(line), f)) { \
711 #define FOREACH_DIRENT(de, d, on_error) \
712 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
718 } else if (ignore_file((de)->d_name)) \
722 static inline void *mempset(void *s, int c, size_t n) {
724 return (uint8_t*)s + n;
727 char *hexmem(const void *p, size_t l);
728 void *unhexmem(const char *p, size_t l);
730 char *strextend(char **x, ...) _sentinel_;
731 char *strrep(const char *s, unsigned n);
733 void* greedy_realloc(void **p, size_t *allocated, size_t need);
734 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
735 #define GREEDY_REALLOC(array, allocated, need) \
736 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
737 #define GREEDY_REALLOC0(array, allocated, need) \
738 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
740 #define GREEDY_REALLOC0_T(array, count, need) \
742 size_t _size = (count) * sizeof((array)[0]); \
743 void *_ptr = GREEDY_REALLOC0((array), _size, (need)); \
745 (count) = _size / sizeof((array)[0]); \
749 static inline void _reset_errno_(int *saved_errno) {
750 errno = *saved_errno;
753 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
755 struct _umask_struct_ {
760 static inline void _reset_umask_(struct _umask_struct_ *s) {
764 #define RUN_WITH_UMASK(mask) \
765 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
766 !_saved_umask_.quit ; \
767 _saved_umask_.quit = true)
769 static inline unsigned u64log2(uint64_t n) {
770 #if __SIZEOF_LONG_LONG__ == 8
771 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
777 static inline unsigned u32ctz(uint32_t n) {
778 #if __SIZEOF_INT__ == 4
779 return __builtin_ctz(n);
785 static inline bool logind_running(void) {
786 return access("/run/systemd/seats/", F_OK) >= 0;
789 #define DECIMAL_STR_WIDTH(x) \
791 typeof(x) _x_ = (x); \
798 int unlink_noerrno(const char *path);
804 _new_ = alloca(_len_); \
805 (void *) memset(_new_, 0, _len_); \
808 #define strappenda(a, b) \
810 const char *_a_ = (a), *_b_ = (b); \
815 _c_ = alloca(_x_ + _y_ + 1); \
816 strcpy(stpcpy(_c_, _a_), _b_); \
820 #define strappenda3(a, b, c) \
822 const char *_a_ = (a), *_b_ = (b), *_c_ = (c); \
824 size_t _x_, _y_, _z_; \
828 _d_ = alloca(_x_ + _y_ + _z_ + 1); \
829 strcpy(stpcpy(stpcpy(_d_, _a_), _b_), _c_); \
833 #define procfs_file_alloca(pid, field) \
835 pid_t _pid_ = (pid); \
838 _r_ = ("/proc/self/" field); \
840 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
841 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
846 struct _locale_struct_ {
847 locale_t saved_locale;
852 static inline void _reset_locale_(struct _locale_struct_ *s) {
854 if (s->saved_locale != (locale_t) 0)
855 uselocale(s->saved_locale);
856 if (s->new_locale != (locale_t) 0)
857 freelocale(s->new_locale);
860 #define RUN_WITH_LOCALE(mask, loc) \
861 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
863 if (!_saved_locale_.quit) { \
865 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
866 if (_saved_locale_.new_locale != (locale_t) 0) \
867 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
869 !_saved_locale_.quit; }) ; \
870 _saved_locale_.quit = true)
872 bool id128_is_valid(const char *s) _pure_;
874 int split_pair(const char *s, const char *sep, char **l, char **r);
876 int shall_restore_state(void);
879 * Normal qsort requires base to be nonnull. Here were require
880 * that only if nmemb > 0.
882 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
883 int (*compar)(const void *, const void *)) {
886 qsort(base, nmemb, size, compar);
890 int proc_cmdline(char **ret);
891 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
893 int container_get_leader(const char *machine, pid_t *pid);
895 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
896 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
898 bool pid_is_alive(pid_t pid);
899 bool pid_is_unwaited(pid_t pid);
901 int getpeercred(int fd, struct ucred *ucred);
902 int getpeersec(int fd, char **ret);
904 int writev_safe(int fd, const struct iovec *w, int j);
906 int mkostemp_safe(char *pattern, int flags);
907 int open_tmpfile(const char *path, int flags);
909 int fd_warn_permissions(const char *path, int fd);
911 unsigned long personality_from_string(const char *p);
912 const char *personality_to_string(unsigned long);
914 uint64_t physical_memory(void);
916 char* mount_test_option(const char *haystack, const char *needle);