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_comm(pid_t pid, char **name);
242 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
243 int get_process_exe(pid_t pid, char **name);
244 int get_process_uid(pid_t pid, uid_t *uid);
245 int get_process_gid(pid_t pid, gid_t *gid);
246 int get_process_capeff(pid_t pid, char **capeff);
248 char hexchar(int x) _const_;
249 int unhexchar(char c) _const_;
250 char octchar(int x) _const_;
251 int unoctchar(char c) _const_;
252 char decchar(int x) _const_;
253 int undecchar(char c) _const_;
255 char *cescape(const char *s);
256 char *cunescape(const char *s);
257 char *cunescape_length(const char *s, size_t length);
258 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
260 char *xescape(const char *s, const char *bad);
262 char *ascii_strlower(char *path);
264 bool dirent_is_file(const struct dirent *de) _pure_;
265 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
267 bool ignore_file(const char *filename) _pure_;
269 bool chars_intersect(const char *a, const char *b) _pure_;
271 int make_stdio(int fd);
272 int make_null_stdio(void);
273 int make_console_stdio(void);
275 int dev_urandom(void *p, size_t n);
276 void random_bytes(void *p, size_t n);
278 static inline uint64_t random_u64(void) {
280 random_bytes(&u, sizeof(u));
284 static inline uint32_t random_u32(void) {
286 random_bytes(&u, sizeof(u));
290 /* For basic lookup tables with strictly enumerated entries */
291 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
292 scope const char *name##_to_string(type i) { \
293 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
295 return name##_table[i]; \
297 scope type name##_from_string(const char *s) { \
301 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
302 if (name##_table[i] && \
303 streq(name##_table[i], s)) \
307 struct __useless_struct_to_allow_trailing_semicolon__
309 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
310 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
312 /* For string conversions where numbers are also acceptable */
313 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
314 int name##_to_string_alloc(type i, char **str) { \
317 if (i < 0 || i > max) \
319 if (i < (type) ELEMENTSOF(name##_table)) { \
320 s = strdup(name##_table[i]); \
324 r = asprintf(&s, "%u", i); \
331 type name##_from_string(const char *s) { \
335 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
336 if (name##_table[i] && \
337 streq(name##_table[i], s)) \
339 if (safe_atou(s, &u) >= 0 && u <= max) \
343 struct __useless_struct_to_allow_trailing_semicolon__
345 int fd_nonblock(int fd, bool nonblock);
346 int fd_cloexec(int fd, bool cloexec);
348 int close_all_fds(const int except[], unsigned n_except);
350 bool fstype_is_network(const char *fstype);
354 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
355 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
357 int reset_terminal_fd(int fd, bool switch_to_text);
358 int reset_terminal(const char *name);
360 int open_terminal(const char *name, int mode);
361 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
362 int release_terminal(void);
364 int flush_fd(int fd);
366 int ignore_signals(int sig, ...);
367 int default_signals(int sig, ...);
368 int sigaction_many(const struct sigaction *sa, ...);
370 int close_pipe(int p[]);
371 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
373 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
374 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
376 bool is_device_path(const char *path);
378 int dir_is_empty(const char *path);
379 char* dirname_malloc(const char *path);
381 void rename_process(const char name[8]);
383 void sigset_add_many(sigset_t *ss, ...);
385 bool hostname_is_set(void);
387 char* gethostname_malloc(void);
388 char* getlogname_malloc(void);
389 char* getusername_malloc(void);
391 int getttyname_malloc(int fd, char **r);
392 int getttyname_harder(int fd, char **r);
394 int get_ctty_devnr(pid_t pid, dev_t *d);
395 int get_ctty(pid_t, dev_t *_devnr, char **r);
397 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
398 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
400 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
401 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
402 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
403 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
405 int pipe_eof(int fd);
407 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
409 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
410 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
411 int status_welcome(void);
413 int fd_columns(int fd);
414 unsigned columns(void);
415 int fd_lines(int fd);
416 unsigned lines(void);
417 void columns_lines_cache_reset(int _unused_ signum);
421 static inline const char *ansi_highlight(void) {
422 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
425 static inline const char *ansi_highlight_red(void) {
426 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
429 static inline const char *ansi_highlight_green(void) {
430 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
433 static inline const char *ansi_highlight_yellow(void) {
434 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
437 static inline const char *ansi_highlight_blue(void) {
438 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
441 static inline const char *ansi_highlight_off(void) {
442 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
445 int running_in_chroot(void);
447 char *ellipsize(const char *s, size_t length, unsigned percent);
449 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
451 int touch(const char *path);
453 char *unquote(const char *s, const char *quotes);
454 char *normalize_env_assignment(const char *s);
456 int wait_for_terminate(pid_t pid, siginfo_t *status);
457 int wait_for_terminate_and_warn(const char *name, pid_t pid);
459 noreturn void freeze(void);
461 bool null_or_empty(struct stat *st) _pure_;
462 int null_or_empty_path(const char *fn);
464 DIR *xopendirat(int dirfd, const char *name, int flags);
466 char *fstab_node_to_udev_node(const char *p);
468 char *resolve_dev_console(char **active);
469 bool tty_is_vc(const char *tty);
470 bool tty_is_vc_resolve(const char *tty);
471 bool tty_is_console(const char *tty) _pure_;
472 int vtnr_from_tty(const char *tty);
473 const char *default_term_for_tty(const char *tty);
475 void execute_directory(const char *directory, DIR *_d, char *argv[]);
477 int kill_and_sigcont(pid_t pid, int sig);
479 bool nulstr_contains(const char*nulstr, const char *needle);
481 bool plymouth_running(void);
483 bool hostname_is_valid(const char *s) _pure_;
484 char* hostname_cleanup(char *s, bool lowercase);
486 char* strshorten(char *s, size_t l);
488 int terminal_vhangup_fd(int fd);
489 int terminal_vhangup(const char *name);
491 int vt_disallocate(const char *name);
493 int copy_file(const char *from, const char *to, int flags);
495 int symlink_atomic(const char *from, const char *to);
497 int fchmod_umask(int fd, mode_t mode);
499 bool display_is_local(const char *display) _pure_;
500 int socket_from_display(const char *display, char **path);
502 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
503 int get_group_creds(const char **groupname, gid_t *gid);
505 int in_gid(gid_t gid);
506 int in_group(const char *name);
508 char* uid_to_name(uid_t uid);
509 char* gid_to_name(gid_t gid);
511 int glob_exists(const char *path);
512 int glob_extend(char ***strv, const char *path);
514 int dirent_ensure_type(DIR *d, struct dirent *de);
516 int in_search_path(const char *path, char **search);
517 int get_files_in_directory(const char *path, char ***list);
519 char *strjoin(const char *x, ...) _sentinel_;
521 bool is_main_thread(void);
523 bool in_charset(const char *s, const char* charset) _pure_;
525 int block_get_whole_disk(dev_t d, dev_t *ret);
527 int file_is_priv_sticky(const char *p);
529 int strdup_or_null(const char *a, char **b);
531 #define NULSTR_FOREACH(i, l) \
532 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
534 #define NULSTR_FOREACH_PAIR(i, j, l) \
535 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
537 int ioprio_class_to_string_alloc(int i, char **s);
538 int ioprio_class_from_string(const char *s);
540 const char *sigchld_code_to_string(int i) _const_;
541 int sigchld_code_from_string(const char *s) _pure_;
543 int log_facility_unshifted_to_string_alloc(int i, char **s);
544 int log_facility_unshifted_from_string(const char *s);
546 int log_level_to_string_alloc(int i, char **s);
547 int log_level_from_string(const char *s);
549 int sched_policy_to_string_alloc(int i, char **s);
550 int sched_policy_from_string(const char *s);
552 const char *rlimit_to_string(int i) _const_;
553 int rlimit_from_string(const char *s) _pure_;
555 int ip_tos_to_string_alloc(int i, char **s);
556 int ip_tos_from_string(const char *s);
558 const char *signal_to_string(int i) _const_;
559 int signal_from_string(const char *s) _pure_;
561 int signal_from_string_try_harder(const char *s);
563 extern int saved_argc;
564 extern char **saved_argv;
566 bool kexec_loaded(void);
568 int prot_from_flags(int flags) _const_;
570 char *format_bytes(char *buf, size_t l, off_t t);
572 int fd_wait_for_event(int fd, int event, usec_t timeout);
574 void* memdup(const void *p, size_t l) _alloc_(2);
576 int is_kernel_thread(pid_t pid);
578 int fd_inc_sndbuf(int fd, size_t n);
579 int fd_inc_rcvbuf(int fd, size_t n);
581 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
583 int setrlimit_closest(int resource, const struct rlimit *rlim);
585 int getenv_for_pid(pid_t pid, const char *field, char **_value);
587 bool is_valid_documentation_url(const char *url) _pure_;
589 bool in_initrd(void);
591 void warn_melody(void);
593 int get_home_dir(char **ret);
594 int get_shell(char **_ret);
596 static inline void freep(void *p) {
600 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
601 static inline void func##p(type *p) { \
605 struct __useless_struct_to_allow_trailing_semicolon__
607 static inline void closep(int *fd) {
609 close_nointr_nofail(*fd);
612 static inline void umaskp(mode_t *u) {
616 static inline void close_pipep(int (*p)[2]) {
620 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
621 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
622 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
623 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
625 #define _cleanup_free_ _cleanup_(freep)
626 #define _cleanup_close_ _cleanup_(closep)
627 #define _cleanup_umask_ _cleanup_(umaskp)
628 #define _cleanup_globfree_ _cleanup_(globfree)
629 #define _cleanup_fclose_ _cleanup_(fclosep)
630 #define _cleanup_pclose_ _cleanup_(pclosep)
631 #define _cleanup_closedir_ _cleanup_(closedirp)
632 #define _cleanup_endmntent_ _cleanup_(endmntentp)
633 #define _cleanup_close_pipe_ _cleanup_(close_pipep)
635 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
636 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
639 return malloc(a * b);
642 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
643 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
646 return memdup(p, a * b);
649 bool filename_is_safe(const char *p) _pure_;
650 bool path_is_safe(const char *p) _pure_;
651 bool string_is_safe(const char *p) _pure_;
652 bool string_has_cc(const char *p) _pure_;
655 * Check if a string contains any glob patterns.
657 _pure_ static inline bool string_is_glob(const char *p) {
658 return !!strpbrk(p, GLOB_CHARS);
661 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
662 int (*compar) (const void *, const void *, void *),
665 bool is_locale_utf8(void);
667 typedef enum DrawSpecialChar {
672 DRAW_TRIANGULAR_BULLET,
674 _DRAW_SPECIAL_CHAR_MAX
676 const char *draw_special_char(DrawSpecialChar ch);
678 char *strreplace(const char *text, const char *old_string, const char *new_string);
680 char *strip_tab_ansi(char **p, size_t *l);
682 int on_ac_power(void);
684 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f);
685 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f);
687 #define FOREACH_LINE(line, f, on_error) \
689 if (!fgets(line, sizeof(line), f)) { \
696 #define FOREACH_DIRENT(de, d, on_error) \
697 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
703 } else if (ignore_file((de)->d_name)) \
707 static inline void *mempset(void *s, int c, size_t n) {
709 return (uint8_t*)s + n;
712 char *hexmem(const void *p, size_t l);
713 void *unhexmem(const char *p, size_t l);
715 char *strextend(char **x, ...) _sentinel_;
716 char *strrep(const char *s, unsigned n);
718 void* greedy_realloc(void **p, size_t *allocated, size_t need);
719 void* greedy_realloc0(void **p, size_t *allocated, size_t need);
720 #define GREEDY_REALLOC(array, allocated, need) \
721 greedy_realloc((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
722 #define GREEDY_REALLOC0(array, allocated, need) \
723 greedy_realloc0((void**) &(array), &(allocated), sizeof((array)[0]) * (need))
725 static inline void _reset_errno_(int *saved_errno) {
726 errno = *saved_errno;
729 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
731 struct _umask_struct_ {
736 static inline void _reset_umask_(struct _umask_struct_ *s) {
740 #define RUN_WITH_UMASK(mask) \
741 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
742 !_saved_umask_.quit ; \
743 _saved_umask_.quit = true)
745 static inline unsigned u64log2(uint64_t n) {
746 #if __SIZEOF_LONG_LONG__ == 8
747 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
753 static inline unsigned u32ctz(uint32_t n) {
754 #if __SIZEOF_INT__ == 4
755 return __builtin_ctz(n);
761 static inline bool logind_running(void) {
762 return access("/run/systemd/seats/", F_OK) >= 0;
765 #define DECIMAL_STR_WIDTH(x) \
767 typeof(x) _x_ = (x); \
774 int unlink_noerrno(const char *path);
780 _new_ = alloca(_len_); \
781 (void *) memset(_new_, 0, _len_); \
784 #define strappenda(a, b) \
786 const char *_a_ = (a), *_b_ = (b); \
791 _c_ = alloca(_x_ + _y_ + 1); \
792 strcpy(stpcpy(_c_, _a_), _b_); \
796 #define procfs_file_alloca(pid, field) \
798 pid_t _pid_ = (pid); \
801 _r_ = ("/proc/self/" field); \
803 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
804 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
809 struct _locale_struct_ {
810 locale_t saved_locale;
815 static inline void _reset_locale_(struct _locale_struct_ *s) {
817 if (s->saved_locale != (locale_t) 0)
818 uselocale(s->saved_locale);
819 if (s->new_locale != (locale_t) 0)
820 freelocale(s->new_locale);
823 #define RUN_WITH_LOCALE(mask, loc) \
824 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
826 if (!_saved_locale_.quit) { \
828 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
829 if (_saved_locale_.new_locale != (locale_t) 0) \
830 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
832 !_saved_locale_.quit; }) ; \
833 _saved_locale_.quit = true)
835 bool id128_is_valid(const char *s) _pure_;
837 int split_pair(const char *s, const char *sep, char **l, char **r);
839 int shall_restore_state(void);
842 * Normal qsort requires base to be nonnull. Here were require
843 * that only if nmemb > 0.
845 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
846 int (*compar)(const void *, const void *)) {
849 qsort(base, nmemb, size, compar);
853 int proc_cmdline(char **ret);
855 int container_get_leader(const char *machine, pid_t *pid);
857 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
858 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
860 bool pid_valid(pid_t pid);
862 int getpeercred(int fd, struct ucred *ucred);
863 int getpeersec(int fd, char **ret);
865 int writev_safe(int fd, const struct iovec *w, int j);
867 int mkostemp_safe(char *pattern, int flags);
868 int open_tmpfile(const char *path, int flags);
870 int fd_warn_permissions(const char *path, int fd);