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, bool quoted, char **state);
203 #define FOREACH_WORD(word, length, s, state) \
204 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
206 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
207 _FOREACH_WORD(word, length, s, separator, false, state)
209 #define FOREACH_WORD_QUOTED(word, length, s, state) \
210 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
212 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
213 _FOREACH_WORD(word, length, s, separator, true, state)
215 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
216 for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state)))
218 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
219 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
221 char *strappend(const char *s, const char *suffix);
222 char *strnappend(const char *s, const char *suffix, size_t length);
224 char *replace_env(const char *format, char **env);
225 char **replace_env_argv(char **argv, char **env);
227 int readlink_malloc(const char *p, char **r);
228 int readlink_and_make_absolute(const char *p, char **r);
229 int readlink_and_canonicalize(const char *p, char **r);
231 int reset_all_signal_handlers(void);
233 char *strstrip(char *s);
234 char *delete_chars(char *s, const char *bad);
235 char *truncate_nl(char *s);
237 char *file_in_same_dir(const char *path, const char *filename);
239 int rmdir_parents(const char *path, const char *stop);
241 int get_process_state(pid_t pid);
242 int get_process_comm(pid_t pid, char **name);
243 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
244 int get_process_exe(pid_t pid, char **name);
245 int get_process_uid(pid_t pid, uid_t *uid);
246 int get_process_gid(pid_t pid, gid_t *gid);
247 int get_process_capeff(pid_t pid, char **capeff);
249 char hexchar(int x) _const_;
250 int unhexchar(char c) _const_;
251 char octchar(int x) _const_;
252 int unoctchar(char c) _const_;
253 char decchar(int x) _const_;
254 int undecchar(char c) _const_;
256 char *cescape(const char *s);
257 char *cunescape(const char *s);
258 char *cunescape_length(const char *s, size_t length);
259 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
261 char *xescape(const char *s, const char *bad);
263 char *ascii_strlower(char *path);
265 bool dirent_is_file(const struct dirent *de) _pure_;
266 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
268 bool ignore_file(const char *filename) _pure_;
270 bool chars_intersect(const char *a, const char *b) _pure_;
272 int make_stdio(int fd);
273 int make_null_stdio(void);
274 int make_console_stdio(void);
276 int dev_urandom(void *p, size_t n);
277 void random_bytes(void *p, size_t n);
279 static inline uint64_t random_u64(void) {
281 random_bytes(&u, sizeof(u));
285 static inline uint32_t random_u32(void) {
287 random_bytes(&u, sizeof(u));
291 /* For basic lookup tables with strictly enumerated entries */
292 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
293 scope const char *name##_to_string(type i) { \
294 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
296 return name##_table[i]; \
298 scope type name##_from_string(const char *s) { \
302 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
303 if (name##_table[i] && \
304 streq(name##_table[i], s)) \
308 struct __useless_struct_to_allow_trailing_semicolon__
310 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
311 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
313 /* For string conversions where numbers are also acceptable */
314 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
315 int name##_to_string_alloc(type i, char **str) { \
318 if (i < 0 || i > max) \
320 if (i < (type) ELEMENTSOF(name##_table)) { \
321 s = strdup(name##_table[i]); \
325 r = asprintf(&s, "%u", i); \
332 type name##_from_string(const char *s) { \
336 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
337 if (name##_table[i] && \
338 streq(name##_table[i], s)) \
340 if (safe_atou(s, &u) >= 0 && u <= max) \
344 struct __useless_struct_to_allow_trailing_semicolon__
346 int fd_nonblock(int fd, bool nonblock);
347 int fd_cloexec(int fd, bool cloexec);
349 int close_all_fds(const int except[], unsigned n_except);
351 bool fstype_is_network(const char *fstype);
355 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
356 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
358 int reset_terminal_fd(int fd, bool switch_to_text);
359 int reset_terminal(const char *name);
361 int open_terminal(const char *name, int mode);
362 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
363 int release_terminal(void);
365 int flush_fd(int fd);
367 int ignore_signals(int sig, ...);
368 int default_signals(int sig, ...);
369 int sigaction_many(const struct sigaction *sa, ...);
371 int close_pipe(int p[]);
372 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
374 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
375 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
377 bool is_device_path(const char *path);
379 int dir_is_empty(const char *path);
380 char* dirname_malloc(const char *path);
382 void rename_process(const char name[8]);
384 void sigset_add_many(sigset_t *ss, ...);
386 bool hostname_is_set(void);
388 char* gethostname_malloc(void);
389 char* getlogname_malloc(void);
390 char* getusername_malloc(void);
392 int getttyname_malloc(int fd, char **r);
393 int getttyname_harder(int fd, char **r);
395 int get_ctty_devnr(pid_t pid, dev_t *d);
396 int get_ctty(pid_t, dev_t *_devnr, char **r);
398 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
399 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
401 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
402 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
403 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
404 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
406 int pipe_eof(int fd);
408 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
410 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
411 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
412 int status_welcome(void);
414 int fd_columns(int fd);
415 unsigned columns(void);
416 int fd_lines(int fd);
417 unsigned lines(void);
418 void columns_lines_cache_reset(int _unused_ signum);
422 static inline const char *ansi_highlight(void) {
423 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
426 static inline const char *ansi_highlight_red(void) {
427 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
430 static inline const char *ansi_highlight_green(void) {
431 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
434 static inline const char *ansi_highlight_yellow(void) {
435 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
438 static inline const char *ansi_highlight_blue(void) {
439 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
442 static inline const char *ansi_highlight_off(void) {
443 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
446 int running_in_chroot(void);
448 char *ellipsize(const char *s, size_t length, unsigned percent);
450 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
452 int touch(const char *path);
454 char *unquote(const char *s, const char *quotes);
455 char *normalize_env_assignment(const char *s);
457 int wait_for_terminate(pid_t pid, siginfo_t *status);
458 int wait_for_terminate_and_warn(const char *name, pid_t pid);
460 noreturn void freeze(void);
462 bool null_or_empty(struct stat *st) _pure_;
463 int null_or_empty_path(const char *fn);
465 DIR *xopendirat(int dirfd, const char *name, int flags);
467 char *fstab_node_to_udev_node(const char *p);
469 char *resolve_dev_console(char **active);
470 bool tty_is_vc(const char *tty);
471 bool tty_is_vc_resolve(const char *tty);
472 bool tty_is_console(const char *tty) _pure_;
473 int vtnr_from_tty(const char *tty);
474 const char *default_term_for_tty(const char *tty);
476 void execute_directory(const char *directory, DIR *_d, char *argv[]);
478 int kill_and_sigcont(pid_t pid, int sig);
480 bool nulstr_contains(const char*nulstr, const char *needle);
482 bool plymouth_running(void);
484 bool hostname_is_valid(const char *s) _pure_;
485 char* hostname_cleanup(char *s, bool lowercase);
487 char* strshorten(char *s, size_t l);
489 int terminal_vhangup_fd(int fd);
490 int terminal_vhangup(const char *name);
492 int vt_disallocate(const char *name);
494 int copy_file(const char *from, const char *to, int flags);
496 int symlink_atomic(const char *from, const char *to);
498 int fchmod_umask(int fd, mode_t mode);
500 bool display_is_local(const char *display) _pure_;
501 int socket_from_display(const char *display, char **path);
503 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
504 int get_group_creds(const char **groupname, gid_t *gid);
506 int in_gid(gid_t gid);
507 int in_group(const char *name);
509 char* uid_to_name(uid_t uid);
510 char* gid_to_name(gid_t gid);
512 int glob_exists(const char *path);
513 int glob_extend(char ***strv, const char *path);
515 int dirent_ensure_type(DIR *d, struct dirent *de);
517 int in_search_path(const char *path, char **search);
518 int get_files_in_directory(const char *path, char ***list);
520 char *strjoin(const char *x, ...) _sentinel_;
522 bool is_main_thread(void);
524 bool in_charset(const char *s, const char* charset) _pure_;
526 int block_get_whole_disk(dev_t d, dev_t *ret);
528 int file_is_priv_sticky(const char *p);
530 int strdup_or_null(const char *a, char **b);
532 #define NULSTR_FOREACH(i, l) \
533 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
535 #define NULSTR_FOREACH_PAIR(i, j, l) \
536 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
538 int ioprio_class_to_string_alloc(int i, char **s);
539 int ioprio_class_from_string(const char *s);
541 const char *sigchld_code_to_string(int i) _const_;
542 int sigchld_code_from_string(const char *s) _pure_;
544 int log_facility_unshifted_to_string_alloc(int i, char **s);
545 int log_facility_unshifted_from_string(const char *s);
547 int log_level_to_string_alloc(int i, char **s);
548 int log_level_from_string(const char *s);
550 int sched_policy_to_string_alloc(int i, char **s);
551 int sched_policy_from_string(const char *s);
553 const char *rlimit_to_string(int i) _const_;
554 int rlimit_from_string(const char *s) _pure_;
556 int ip_tos_to_string_alloc(int i, char **s);
557 int ip_tos_from_string(const char *s);
559 const char *signal_to_string(int i) _const_;
560 int signal_from_string(const char *s) _pure_;
562 int signal_from_string_try_harder(const char *s);
564 extern int saved_argc;
565 extern char **saved_argv;
567 bool kexec_loaded(void);
569 int prot_from_flags(int flags) _const_;
571 char *format_bytes(char *buf, size_t l, off_t t);
573 int fd_wait_for_event(int fd, int event, usec_t timeout);
575 void* memdup(const void *p, size_t l) _alloc_(2);
577 int is_kernel_thread(pid_t pid);
579 int fd_inc_sndbuf(int fd, size_t n);
580 int fd_inc_rcvbuf(int fd, size_t n);
582 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
584 int setrlimit_closest(int resource, const struct rlimit *rlim);
586 int getenv_for_pid(pid_t pid, const char *field, char **_value);
588 bool is_valid_documentation_url(const char *url) _pure_;
590 bool in_initrd(void);
592 void warn_melody(void);
594 int get_home_dir(char **ret);
595 int get_shell(char **_ret);
597 static inline void freep(void *p) {
601 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
602 static inline void func##p(type *p) { \
606 struct __useless_struct_to_allow_trailing_semicolon__
608 static inline void closep(int *fd) {
610 close_nointr_nofail(*fd);
613 static inline void umaskp(mode_t *u) {
617 static inline void close_pipep(int (*p)[2]) {
621 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
622 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
623 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
624 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
626 #define _cleanup_free_ _cleanup_(freep)
627 #define _cleanup_close_ _cleanup_(closep)
628 #define _cleanup_umask_ _cleanup_(umaskp)
629 #define _cleanup_globfree_ _cleanup_(globfree)
630 #define _cleanup_fclose_ _cleanup_(fclosep)
631 #define _cleanup_pclose_ _cleanup_(pclosep)
632 #define _cleanup_closedir_ _cleanup_(closedirp)
633 #define _cleanup_endmntent_ _cleanup_(endmntentp)
634 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
636 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
637 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
640 return malloc(a * b);
643 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
644 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
647 return memdup(p, a * b);
650 bool filename_is_safe(const char *p) _pure_;
651 bool path_is_safe(const char *p) _pure_;
652 bool string_is_safe(const char *p) _pure_;
653 bool string_has_cc(const char *p) _pure_;
656 * Check if a string contains any glob patterns.
658 _pure_ static inline bool string_is_glob(const char *p) {
659 return !!strpbrk(p, GLOB_CHARS);
662 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
663 int (*compar) (const void *, const void *, void *),
666 bool is_locale_utf8(void);
668 typedef enum DrawSpecialChar {
673 DRAW_TRIANGULAR_BULLET,
675 _DRAW_SPECIAL_CHAR_MAX
677 const char *draw_special_char(DrawSpecialChar ch);
679 char *strreplace(const char *text, const char *old_string, const char *new_string);
681 char *strip_tab_ansi(char **p, size_t *l);
683 int on_ac_power(void);
685 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
686 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
688 #define FOREACH_LINE(line, f, on_error) \
690 if (!fgets(line, sizeof(line), f)) { \
697 #define FOREACH_DIRENT(de, d, on_error) \
698 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
704 } else if (ignore_file((de)->d_name)) \
708 static inline void *mempset(void *s, int c, size_t n) {
710 return (uint8_t*)s + n;
713 char *hexmem(const void *p, size_t l);
714 void *unhexmem(const char *p, size_t l);
716 char *strextend(char **x, ...) _sentinel_;
717 char *strrep(const char *s, unsigned n);
719 void* greedy_realloc(void **p, size_t *allocated, size_t need);
720 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
721 #define GREEDY_REALLOC(array, allocated, need) \
722 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
723 #define GREEDY_REALLOC0(array, allocated, need) \
724 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
726 static inline void _reset_errno_(int *saved_errno) {
727 errno = *saved_errno;
730 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
732 struct _umask_struct_ {
737 static inline void _reset_umask_(struct _umask_struct_ *s) {
741 #define RUN_WITH_UMASK(mask) \
742 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
743 !_saved_umask_.quit ; \
744 _saved_umask_.quit = true)
746 static inline unsigned u64log2(uint64_t n) {
747 #if __SIZEOF_LONG_LONG__ == 8
748 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
754 static inline unsigned u32ctz(uint32_t n) {
755 #if __SIZEOF_INT__ == 4
756 return __builtin_ctz(n);
762 static inline bool logind_running(void) {
763 return access("/run/systemd/seats/", F_OK) >= 0;
766 #define DECIMAL_STR_WIDTH(x) \
768 typeof(x) _x_ = (x); \
775 int unlink_noerrno(const char *path);
781 _new_ = alloca(_len_); \
782 (void *) memset(_new_, 0, _len_); \
785 #define strappenda(a, b) \
787 const char *_a_ = (a), *_b_ = (b); \
792 _c_ = alloca(_x_ + _y_ + 1); \
793 strcpy(stpcpy(_c_, _a_), _b_); \
797 #define procfs_file_alloca(pid, field) \
799 pid_t _pid_ = (pid); \
802 _r_ = ("/proc/self/" field); \
804 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
805 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
810 struct _locale_struct_ {
811 locale_t saved_locale;
816 static inline void _reset_locale_(struct _locale_struct_ *s) {
818 if (s->saved_locale != (locale_t) 0)
819 uselocale(s->saved_locale);
820 if (s->new_locale != (locale_t) 0)
821 freelocale(s->new_locale);
824 #define RUN_WITH_LOCALE(mask, loc) \
825 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
827 if (!_saved_locale_.quit) { \
829 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
830 if (_saved_locale_.new_locale != (locale_t) 0) \
831 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
833 !_saved_locale_.quit; }) ; \
834 _saved_locale_.quit = true)
836 bool id128_is_valid(const char *s) _pure_;
838 int split_pair(const char *s, const char *sep, char **l, char **r);
840 int shall_restore_state(void);
843 * Normal qsort requires base to be nonnull. Here were require
844 * that only if nmemb > 0.
846 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
847 int (*compar)(const void *, const void *)) {
850 qsort(base, nmemb, size, compar);
854 int proc_cmdline(char **ret);
855 int parse_proc_cmdline(int (*parse_word)(const char *word));
857 int container_get_leader(const char *machine, pid_t *pid);
859 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
860 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
862 bool pid_valid(pid_t pid);
864 int getpeercred(int fd, struct ucred *ucred);
865 int getpeersec(int fd, char **ret);
867 int writev_safe(int fd, const struct iovec *w, int j);
869 int mkostemp_safe(char *pattern, int flags);
870 int open_tmpfile(const char *path, int flags);
872 int fd_warn_permissions(const char *path, int fd);