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 int safe_close(int fd);
154 void close_many(const int fds[], unsigned n_fd);
156 int parse_size(const char *t, off_t base, off_t *size);
158 int parse_boolean(const char *v) _pure_;
159 int parse_pid(const char *s, pid_t* ret_pid);
160 int parse_uid(const char *s, uid_t* ret_uid);
161 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
163 int safe_atou(const char *s, unsigned *ret_u);
164 int safe_atoi(const char *s, int *ret_i);
166 int safe_atollu(const char *s, unsigned long long *ret_u);
167 int safe_atolli(const char *s, long long int *ret_i);
169 int safe_atod(const char *s, double *ret_d);
172 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
173 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
174 return safe_atou(s, (unsigned*) ret_u);
176 static inline int safe_atoli(const char *s, long int *ret_u) {
177 assert_cc(sizeof(long int) == sizeof(int));
178 return safe_atoi(s, (int*) ret_u);
181 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
182 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
183 return safe_atollu(s, (unsigned long long*) ret_u);
185 static inline int safe_atoli(const char *s, long int *ret_u) {
186 assert_cc(sizeof(long int) == sizeof(long long int));
187 return safe_atolli(s, (long long int*) ret_u);
191 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
192 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
193 return safe_atou(s, (unsigned*) ret_u);
196 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
197 assert_cc(sizeof(int32_t) == sizeof(int));
198 return safe_atoi(s, (int*) ret_i);
201 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
202 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
203 return safe_atollu(s, (unsigned long long*) ret_u);
206 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
207 assert_cc(sizeof(int64_t) == sizeof(long long int));
208 return safe_atolli(s, (long long int*) ret_i);
211 char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state);
213 #define FOREACH_WORD(word, length, s, state) \
214 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
216 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
217 _FOREACH_WORD(word, length, s, separator, false, state)
219 #define FOREACH_WORD_QUOTED(word, length, s, state) \
220 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
222 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
223 _FOREACH_WORD(word, length, s, separator, true, state)
225 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
226 for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state)))
228 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
229 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
231 char *strappend(const char *s, const char *suffix);
232 char *strnappend(const char *s, const char *suffix, size_t length);
234 char *replace_env(const char *format, char **env);
235 char **replace_env_argv(char **argv, char **env);
237 int readlink_malloc(const char *p, char **r);
238 int readlink_and_make_absolute(const char *p, char **r);
239 int readlink_and_canonicalize(const char *p, char **r);
241 int reset_all_signal_handlers(void);
243 char *strstrip(char *s);
244 char *delete_chars(char *s, const char *bad);
245 char *truncate_nl(char *s);
247 char *file_in_same_dir(const char *path, const char *filename);
249 int rmdir_parents(const char *path, const char *stop);
251 int get_process_state(pid_t pid);
252 int get_process_comm(pid_t pid, char **name);
253 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
254 int get_process_exe(pid_t pid, char **name);
255 int get_process_uid(pid_t pid, uid_t *uid);
256 int get_process_gid(pid_t pid, gid_t *gid);
257 int get_process_capeff(pid_t pid, char **capeff);
259 char hexchar(int x) _const_;
260 int unhexchar(char c) _const_;
261 char octchar(int x) _const_;
262 int unoctchar(char c) _const_;
263 char decchar(int x) _const_;
264 int undecchar(char c) _const_;
266 char *cescape(const char *s);
267 char *cunescape(const char *s);
268 char *cunescape_length(const char *s, size_t length);
269 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
271 char *xescape(const char *s, const char *bad);
273 char *ascii_strlower(char *path);
275 bool dirent_is_file(const struct dirent *de) _pure_;
276 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
278 bool ignore_file(const char *filename) _pure_;
280 bool chars_intersect(const char *a, const char *b) _pure_;
282 int make_stdio(int fd);
283 int make_null_stdio(void);
284 int make_console_stdio(void);
286 int dev_urandom(void *p, size_t n);
287 void random_bytes(void *p, size_t n);
289 static inline uint64_t random_u64(void) {
291 random_bytes(&u, sizeof(u));
295 static inline uint32_t random_u32(void) {
297 random_bytes(&u, sizeof(u));
301 /* For basic lookup tables with strictly enumerated entries */
302 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
303 scope const char *name##_to_string(type i) { \
304 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
306 return name##_table[i]; \
308 scope 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)) \
318 struct __useless_struct_to_allow_trailing_semicolon__
320 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
321 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
323 /* For string conversions where numbers are also acceptable */
324 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
325 int name##_to_string_alloc(type i, char **str) { \
328 if (i < 0 || i > max) \
330 if (i < (type) ELEMENTSOF(name##_table)) { \
331 s = strdup(name##_table[i]); \
335 r = asprintf(&s, "%u", i); \
342 type name##_from_string(const char *s) { \
346 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
347 if (name##_table[i] && \
348 streq(name##_table[i], s)) \
350 if (safe_atou(s, &u) >= 0 && u <= max) \
354 struct __useless_struct_to_allow_trailing_semicolon__
356 int fd_nonblock(int fd, bool nonblock);
357 int fd_cloexec(int fd, bool cloexec);
359 int close_all_fds(const int except[], unsigned n_except);
361 bool fstype_is_network(const char *fstype);
365 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
366 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
368 int reset_terminal_fd(int fd, bool switch_to_text);
369 int reset_terminal(const char *name);
371 int open_terminal(const char *name, int mode);
372 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
373 int release_terminal(void);
375 int flush_fd(int fd);
377 int ignore_signals(int sig, ...);
378 int default_signals(int sig, ...);
379 int sigaction_many(const struct sigaction *sa, ...);
381 int close_pipe(int p[]);
382 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
384 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
385 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
387 bool is_device_path(const char *path);
389 int dir_is_empty(const char *path);
390 char* dirname_malloc(const char *path);
392 void rename_process(const char name[8]);
394 void sigset_add_many(sigset_t *ss, ...);
396 bool hostname_is_set(void);
398 char* gethostname_malloc(void);
399 char* getlogname_malloc(void);
400 char* getusername_malloc(void);
402 int getttyname_malloc(int fd, char **r);
403 int getttyname_harder(int fd, char **r);
405 int get_ctty_devnr(pid_t pid, dev_t *d);
406 int get_ctty(pid_t, dev_t *_devnr, char **r);
408 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
409 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
411 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
412 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
413 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
414 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
416 int pipe_eof(int fd);
418 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
420 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
421 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
423 int fd_columns(int fd);
424 unsigned columns(void);
425 int fd_lines(int fd);
426 unsigned lines(void);
427 void columns_lines_cache_reset(int _unused_ signum);
431 static inline const char *ansi_highlight(void) {
432 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
435 static inline const char *ansi_highlight_red(void) {
436 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
439 static inline const char *ansi_highlight_green(void) {
440 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
443 static inline const char *ansi_highlight_yellow(void) {
444 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
447 static inline const char *ansi_highlight_blue(void) {
448 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
451 static inline const char *ansi_highlight_off(void) {
452 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
455 int files_same(const char *filea, const char *fileb);
457 int running_in_chroot(void);
459 char *ellipsize(const char *s, size_t length, unsigned percent);
461 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
463 int touch(const char *path);
465 char *unquote(const char *s, const char *quotes);
466 char *normalize_env_assignment(const char *s);
468 int wait_for_terminate(pid_t pid, siginfo_t *status);
469 int wait_for_terminate_and_warn(const char *name, pid_t pid);
471 noreturn void freeze(void);
473 bool null_or_empty(struct stat *st) _pure_;
474 int null_or_empty_path(const char *fn);
476 DIR *xopendirat(int dirfd, const char *name, int flags);
478 char *fstab_node_to_udev_node(const char *p);
480 char *resolve_dev_console(char **active);
481 bool tty_is_vc(const char *tty);
482 bool tty_is_vc_resolve(const char *tty);
483 bool tty_is_console(const char *tty) _pure_;
484 int vtnr_from_tty(const char *tty);
485 const char *default_term_for_tty(const char *tty);
487 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
489 int kill_and_sigcont(pid_t pid, int sig);
491 bool nulstr_contains(const char*nulstr, const char *needle);
493 bool plymouth_running(void);
495 bool hostname_is_valid(const char *s) _pure_;
496 char* hostname_cleanup(char *s, bool lowercase);
498 char* strshorten(char *s, size_t l);
500 int terminal_vhangup_fd(int fd);
501 int terminal_vhangup(const char *name);
503 int vt_disallocate(const char *name);
505 int copy_file(const char *from, const char *to, int flags);
507 int symlink_atomic(const char *from, const char *to);
509 int fchmod_umask(int fd, mode_t mode);
511 bool display_is_local(const char *display) _pure_;
512 int socket_from_display(const char *display, char **path);
514 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
515 int get_group_creds(const char **groupname, gid_t *gid);
517 int in_gid(gid_t gid);
518 int in_group(const char *name);
520 char* uid_to_name(uid_t uid);
521 char* gid_to_name(gid_t gid);
523 int glob_exists(const char *path);
524 int glob_extend(char ***strv, const char *path);
526 int dirent_ensure_type(DIR *d, struct dirent *de);
528 int in_search_path(const char *path, char **search);
529 int get_files_in_directory(const char *path, char ***list);
531 char *strjoin(const char *x, ...) _sentinel_;
533 bool is_main_thread(void);
535 static inline bool _pure_ in_charset(const char *s, const char* charset) {
538 return s[strspn(s, charset)] == '\0';
541 int block_get_whole_disk(dev_t d, dev_t *ret);
543 int file_is_priv_sticky(const char *p);
545 int strdup_or_null(const char *a, char **b);
547 #define NULSTR_FOREACH(i, l) \
548 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
550 #define NULSTR_FOREACH_PAIR(i, j, l) \
551 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
553 int ioprio_class_to_string_alloc(int i, char **s);
554 int ioprio_class_from_string(const char *s);
556 const char *sigchld_code_to_string(int i) _const_;
557 int sigchld_code_from_string(const char *s) _pure_;
559 int log_facility_unshifted_to_string_alloc(int i, char **s);
560 int log_facility_unshifted_from_string(const char *s);
562 int log_level_to_string_alloc(int i, char **s);
563 int log_level_from_string(const char *s);
565 int sched_policy_to_string_alloc(int i, char **s);
566 int sched_policy_from_string(const char *s);
568 const char *rlimit_to_string(int i) _const_;
569 int rlimit_from_string(const char *s) _pure_;
571 int ip_tos_to_string_alloc(int i, char **s);
572 int ip_tos_from_string(const char *s);
574 const char *signal_to_string(int i) _const_;
575 int signal_from_string(const char *s) _pure_;
577 int signal_from_string_try_harder(const char *s);
579 extern int saved_argc;
580 extern char **saved_argv;
582 bool kexec_loaded(void);
584 int prot_from_flags(int flags) _const_;
586 char *format_bytes(char *buf, size_t l, off_t t);
588 int fd_wait_for_event(int fd, int event, usec_t timeout);
590 void* memdup(const void *p, size_t l) _alloc_(2);
592 int is_kernel_thread(pid_t pid);
594 int fd_inc_sndbuf(int fd, size_t n);
595 int fd_inc_rcvbuf(int fd, size_t n);
597 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
599 int setrlimit_closest(int resource, const struct rlimit *rlim);
601 int getenv_for_pid(pid_t pid, const char *field, char **_value);
603 bool is_valid_documentation_url(const char *url) _pure_;
605 bool in_initrd(void);
607 void warn_melody(void);
609 int get_home_dir(char **ret);
610 int get_shell(char **_ret);
612 static inline void freep(void *p) {
616 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
617 static inline void func##p(type *p) { \
621 struct __useless_struct_to_allow_trailing_semicolon__
623 static inline void closep(int *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 *root, const char **search, FILE **_f);
700 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, 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 int log2i(int x) {
788 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
791 static inline bool logind_running(void) {
792 return access("/run/systemd/seats/", F_OK) >= 0;
795 #define DECIMAL_STR_WIDTH(x) \
797 typeof(x) _x_ = (x); \
804 int unlink_noerrno(const char *path);
810 _new_ = alloca(_len_); \
811 (void *) memset(_new_, 0, _len_); \
814 #define strappenda(a, b) \
816 const char *_a_ = (a), *_b_ = (b); \
821 _c_ = alloca(_x_ + _y_ + 1); \
822 strcpy(stpcpy(_c_, _a_), _b_); \
826 #define strappenda3(a, b, c) \
828 const char *_a_ = (a), *_b_ = (b), *_c_ = (c); \
830 size_t _x_, _y_, _z_; \
834 _d_ = alloca(_x_ + _y_ + _z_ + 1); \
835 strcpy(stpcpy(stpcpy(_d_, _a_), _b_), _c_); \
839 #define procfs_file_alloca(pid, field) \
841 pid_t _pid_ = (pid); \
844 _r_ = ("/proc/self/" field); \
846 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
847 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
852 struct _locale_struct_ {
853 locale_t saved_locale;
858 static inline void _reset_locale_(struct _locale_struct_ *s) {
860 if (s->saved_locale != (locale_t) 0)
861 uselocale(s->saved_locale);
862 if (s->new_locale != (locale_t) 0)
863 freelocale(s->new_locale);
866 #define RUN_WITH_LOCALE(mask, loc) \
867 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
869 if (!_saved_locale_.quit) { \
871 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
872 if (_saved_locale_.new_locale != (locale_t) 0) \
873 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
875 !_saved_locale_.quit; }) ; \
876 _saved_locale_.quit = true)
878 bool id128_is_valid(const char *s) _pure_;
880 int split_pair(const char *s, const char *sep, char **l, char **r);
882 int shall_restore_state(void);
885 * Normal qsort requires base to be nonnull. Here were require
886 * that only if nmemb > 0.
888 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
889 int (*compar)(const void *, const void *)) {
892 qsort(base, nmemb, size, compar);
896 int proc_cmdline(char **ret);
897 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
899 int container_get_leader(const char *machine, pid_t *pid);
901 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
902 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
904 bool pid_is_alive(pid_t pid);
905 bool pid_is_unwaited(pid_t pid);
907 int getpeercred(int fd, struct ucred *ucred);
908 int getpeersec(int fd, char **ret);
910 int writev_safe(int fd, const struct iovec *w, int j);
912 int mkostemp_safe(char *pattern, int flags);
913 int open_tmpfile(const char *path, int flags);
915 int fd_warn_permissions(const char *path, int fd);
917 unsigned long personality_from_string(const char *p);
918 const char *personality_to_string(unsigned long);
920 uint64_t physical_memory(void);
922 char* mount_test_option(const char *haystack, const char *needle);
924 void hexdump(FILE *f, const void *p, size_t s);