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/>.
36 #include <sys/types.h>
39 #include <sys/resource.h>
44 #include <sys/socket.h>
47 # define PID_FMT "%" PRIu32
48 #elif SIZEOF_PID_T == 2
49 # define PID_FMT "%" PRIu16
51 # error Unknown pid_t size
55 # define UID_FMT "%" PRIu32
56 #elif SIZEOF_UID_T == 2
57 # define UID_FMT "%" PRIu16
59 # error Unknown uid_t size
63 # define GID_FMT "%" PRIu32
64 #elif SIZEOF_GID_T == 2
65 # define GID_FMT "%" PRIu16
67 # error Unknown gid_t size
71 #include "time-util.h"
73 /* What is interpreted as whitespace? */
74 #define WHITESPACE " \t\n\r"
75 #define NEWLINE "\n\r"
78 #define GLOB_CHARS "*?["
80 #define FORMAT_BYTES_MAX 8
82 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
83 #define ANSI_RED_ON "\x1B[31m"
84 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
85 #define ANSI_GREEN_ON "\x1B[32m"
86 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
87 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
88 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
89 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
90 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
92 size_t page_size(void);
93 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
95 #define streq(a,b) (strcmp((a),(b)) == 0)
96 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
97 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
98 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
100 bool streq_ptr(const char *a, const char *b) _pure_;
102 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
104 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
106 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
108 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
110 #define malloc0(n) (calloc((n), 1))
112 static inline const char* yes_no(bool b) {
113 return b ? "yes" : "no";
116 static inline const char* true_false(bool b) {
117 return b ? "true" : "false";
120 static inline const char* strempty(const char *s) {
124 static inline const char* strnull(const char *s) {
125 return s ? s : "(null)";
128 static inline const char *strna(const char *s) {
129 return s ? s : "n/a";
132 static inline bool isempty(const char *p) {
136 static inline const char *startswith(const char *s, const char *prefix) {
137 if (strncmp(s, prefix, strlen(prefix)) == 0)
138 return s + strlen(prefix);
142 static inline const char *startswith_no_case(const char *s, const char *prefix) {
143 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
144 return s + strlen(prefix);
148 char *endswith(const char *s, const char *postfix) _pure_;
150 bool first_word(const char *s, const char *word) _pure_;
152 int close_nointr(int fd);
153 int safe_close(int fd);
154 void safe_close_pair(int p[]);
156 void close_many(const int fds[], unsigned n_fd);
158 int parse_size(const char *t, off_t base, off_t *size);
160 int parse_boolean(const char *v) _pure_;
161 int parse_pid(const char *s, pid_t* ret_pid);
162 int parse_uid(const char *s, uid_t* ret_uid);
163 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
165 int safe_atou(const char *s, unsigned *ret_u);
166 int safe_atoi(const char *s, int *ret_i);
168 int safe_atollu(const char *s, unsigned long long *ret_u);
169 int safe_atolli(const char *s, long long int *ret_i);
171 int safe_atod(const char *s, double *ret_d);
174 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
175 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
176 return safe_atou(s, (unsigned*) ret_u);
178 static inline int safe_atoli(const char *s, long int *ret_u) {
179 assert_cc(sizeof(long int) == sizeof(int));
180 return safe_atoi(s, (int*) ret_u);
183 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
184 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
185 return safe_atollu(s, (unsigned long long*) ret_u);
187 static inline int safe_atoli(const char *s, long int *ret_u) {
188 assert_cc(sizeof(long int) == sizeof(long long int));
189 return safe_atolli(s, (long long int*) ret_u);
193 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
194 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
195 return safe_atou(s, (unsigned*) ret_u);
198 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
199 assert_cc(sizeof(int32_t) == sizeof(int));
200 return safe_atoi(s, (int*) ret_i);
203 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
204 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
205 return safe_atollu(s, (unsigned long long*) ret_u);
208 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
209 assert_cc(sizeof(int64_t) == sizeof(long long int));
210 return safe_atolli(s, (long long int*) ret_i);
213 char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state);
215 #define FOREACH_WORD(word, length, s, state) \
216 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
218 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
219 _FOREACH_WORD(word, length, s, separator, false, state)
221 #define FOREACH_WORD_QUOTED(word, length, s, state) \
222 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
224 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
225 _FOREACH_WORD(word, length, s, separator, true, state)
227 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
228 for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state)))
230 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
231 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
233 char *strappend(const char *s, const char *suffix);
234 char *strnappend(const char *s, const char *suffix, size_t length);
236 char *replace_env(const char *format, char **env);
237 char **replace_env_argv(char **argv, char **env);
239 int readlink_malloc(const char *p, char **r);
240 int readlink_and_make_absolute(const char *p, char **r);
241 int readlink_and_canonicalize(const char *p, char **r);
243 int reset_all_signal_handlers(void);
245 char *strstrip(char *s);
246 char *delete_chars(char *s, const char *bad);
247 char *truncate_nl(char *s);
249 char *file_in_same_dir(const char *path, const char *filename);
251 int rmdir_parents(const char *path, const char *stop);
253 int get_process_state(pid_t pid);
254 int get_process_comm(pid_t pid, char **name);
255 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
256 int get_process_exe(pid_t pid, char **name);
257 int get_process_uid(pid_t pid, uid_t *uid);
258 int get_process_gid(pid_t pid, gid_t *gid);
259 int get_process_capeff(pid_t pid, char **capeff);
261 char hexchar(int x) _const_;
262 int unhexchar(char c) _const_;
263 char octchar(int x) _const_;
264 int unoctchar(char c) _const_;
265 char decchar(int x) _const_;
266 int undecchar(char c) _const_;
268 char *cescape(const char *s);
269 char *cunescape(const char *s);
270 char *cunescape_length(const char *s, size_t length);
271 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
273 char *xescape(const char *s, const char *bad);
275 char *ascii_strlower(char *path);
277 bool dirent_is_file(const struct dirent *de) _pure_;
278 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
280 bool ignore_file(const char *filename) _pure_;
282 bool chars_intersect(const char *a, const char *b) _pure_;
284 int make_stdio(int fd);
285 int make_null_stdio(void);
286 int make_console_stdio(void);
288 int dev_urandom(void *p, size_t n);
289 void random_bytes(void *p, size_t n);
291 static inline uint64_t random_u64(void) {
293 random_bytes(&u, sizeof(u));
297 static inline uint32_t random_u32(void) {
299 random_bytes(&u, sizeof(u));
303 /* For basic lookup tables with strictly enumerated entries */
304 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
305 scope const char *name##_to_string(type i) { \
306 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
308 return name##_table[i]; \
310 scope type name##_from_string(const char *s) { \
314 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
315 if (name##_table[i] && \
316 streq(name##_table[i], s)) \
320 struct __useless_struct_to_allow_trailing_semicolon__
322 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
323 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
325 /* For string conversions where numbers are also acceptable */
326 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
327 int name##_to_string_alloc(type i, char **str) { \
330 if (i < 0 || i > max) \
332 if (i < (type) ELEMENTSOF(name##_table)) { \
333 s = strdup(name##_table[i]); \
337 r = asprintf(&s, "%u", i); \
344 type name##_from_string(const char *s) { \
348 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
349 if (name##_table[i] && \
350 streq(name##_table[i], s)) \
352 if (safe_atou(s, &u) >= 0 && u <= max) \
356 struct __useless_struct_to_allow_trailing_semicolon__
358 int fd_nonblock(int fd, bool nonblock);
359 int fd_cloexec(int fd, bool cloexec);
361 int close_all_fds(const int except[], unsigned n_except);
363 bool fstype_is_network(const char *fstype);
367 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
368 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
370 int reset_terminal_fd(int fd, bool switch_to_text);
371 int reset_terminal(const char *name);
373 int open_terminal(const char *name, int mode);
374 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
375 int release_terminal(void);
377 int flush_fd(int fd);
379 int ignore_signals(int sig, ...);
380 int default_signals(int sig, ...);
381 int sigaction_many(const struct sigaction *sa, ...);
383 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
385 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
386 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
388 bool is_device_path(const char *path);
390 int dir_is_empty(const char *path);
391 char* dirname_malloc(const char *path);
393 void rename_process(const char name[8]);
395 void sigset_add_many(sigset_t *ss, ...);
397 bool hostname_is_set(void);
399 char* gethostname_malloc(void);
400 char* getlogname_malloc(void);
401 char* getusername_malloc(void);
403 int getttyname_malloc(int fd, char **r);
404 int getttyname_harder(int fd, char **r);
406 int get_ctty_devnr(pid_t pid, dev_t *d);
407 int get_ctty(pid_t, dev_t *_devnr, char **r);
409 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
410 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
412 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
413 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
414 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
415 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
417 int pipe_eof(int fd);
419 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
421 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
422 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
424 int fd_columns(int fd);
425 unsigned columns(void);
426 int fd_lines(int fd);
427 unsigned lines(void);
428 void columns_lines_cache_reset(int _unused_ signum);
432 static inline const char *ansi_highlight(void) {
433 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
436 static inline const char *ansi_highlight_red(void) {
437 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
440 static inline const char *ansi_highlight_green(void) {
441 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
444 static inline const char *ansi_highlight_yellow(void) {
445 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
448 static inline const char *ansi_highlight_blue(void) {
449 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
452 static inline const char *ansi_highlight_off(void) {
453 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
456 int files_same(const char *filea, const char *fileb);
458 int running_in_chroot(void);
460 char *ellipsize(const char *s, size_t length, unsigned percent);
462 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
464 int touch(const char *path);
466 char *unquote(const char *s, const char *quotes);
467 char *normalize_env_assignment(const char *s);
469 int wait_for_terminate(pid_t pid, siginfo_t *status);
470 int wait_for_terminate_and_warn(const char *name, pid_t pid);
472 noreturn void freeze(void);
474 bool null_or_empty(struct stat *st) _pure_;
475 int null_or_empty_path(const char *fn);
477 DIR *xopendirat(int dirfd, const char *name, int flags);
479 char *fstab_node_to_udev_node(const char *p);
481 char *resolve_dev_console(char **active);
482 bool tty_is_vc(const char *tty);
483 bool tty_is_vc_resolve(const char *tty);
484 bool tty_is_console(const char *tty) _pure_;
485 int vtnr_from_tty(const char *tty);
486 const char *default_term_for_tty(const char *tty);
488 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
490 int kill_and_sigcont(pid_t pid, int sig);
492 bool nulstr_contains(const char*nulstr, const char *needle);
494 bool plymouth_running(void);
496 bool hostname_is_valid(const char *s) _pure_;
497 char* hostname_cleanup(char *s, bool lowercase);
499 char* strshorten(char *s, size_t l);
501 int terminal_vhangup_fd(int fd);
502 int terminal_vhangup(const char *name);
504 int vt_disallocate(const char *name);
506 int copy_file(const char *from, const char *to, int flags);
508 int symlink_atomic(const char *from, const char *to);
510 int fchmod_umask(int fd, mode_t mode);
512 bool display_is_local(const char *display) _pure_;
513 int socket_from_display(const char *display, char **path);
515 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
516 int get_group_creds(const char **groupname, gid_t *gid);
518 int in_gid(gid_t gid);
519 int in_group(const char *name);
521 char* uid_to_name(uid_t uid);
522 char* gid_to_name(gid_t gid);
524 int glob_exists(const char *path);
525 int glob_extend(char ***strv, const char *path);
527 int dirent_ensure_type(DIR *d, struct dirent *de);
529 int in_search_path(const char *path, char **search);
530 int get_files_in_directory(const char *path, char ***list);
532 char *strjoin(const char *x, ...) _sentinel_;
534 bool is_main_thread(void);
536 static inline bool _pure_ in_charset(const char *s, const char* charset) {
539 return s[strspn(s, charset)] == '\0';
542 int block_get_whole_disk(dev_t d, dev_t *ret);
544 int file_is_priv_sticky(const char *p);
546 int strdup_or_null(const char *a, char **b);
548 #define NULSTR_FOREACH(i, l) \
549 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
551 #define NULSTR_FOREACH_PAIR(i, j, l) \
552 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
554 int ioprio_class_to_string_alloc(int i, char **s);
555 int ioprio_class_from_string(const char *s);
557 const char *sigchld_code_to_string(int i) _const_;
558 int sigchld_code_from_string(const char *s) _pure_;
560 int log_facility_unshifted_to_string_alloc(int i, char **s);
561 int log_facility_unshifted_from_string(const char *s);
563 int log_level_to_string_alloc(int i, char **s);
564 int log_level_from_string(const char *s);
566 int sched_policy_to_string_alloc(int i, char **s);
567 int sched_policy_from_string(const char *s);
569 const char *rlimit_to_string(int i) _const_;
570 int rlimit_from_string(const char *s) _pure_;
572 int ip_tos_to_string_alloc(int i, char **s);
573 int ip_tos_from_string(const char *s);
575 const char *signal_to_string(int i) _const_;
576 int signal_from_string(const char *s) _pure_;
578 int signal_from_string_try_harder(const char *s);
580 extern int saved_argc;
581 extern char **saved_argv;
583 bool kexec_loaded(void);
585 int prot_from_flags(int flags) _const_;
587 char *format_bytes(char *buf, size_t l, off_t t);
589 int fd_wait_for_event(int fd, int event, usec_t timeout);
591 void* memdup(const void *p, size_t l) _alloc_(2);
593 int is_kernel_thread(pid_t pid);
595 int fd_inc_sndbuf(int fd, size_t n);
596 int fd_inc_rcvbuf(int fd, size_t n);
598 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
600 int setrlimit_closest(int resource, const struct rlimit *rlim);
602 int getenv_for_pid(pid_t pid, const char *field, char **_value);
604 bool is_valid_documentation_url(const char *url) _pure_;
606 bool in_initrd(void);
608 void warn_melody(void);
610 int get_home_dir(char **ret);
611 int get_shell(char **_ret);
613 static inline void freep(void *p) {
617 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
618 static inline void func##p(type *p) { \
622 struct __useless_struct_to_allow_trailing_semicolon__
624 static inline void closep(int *fd) {
628 static inline void umaskp(mode_t *u) {
632 static inline void close_pairp(int (*p)[2]) {
636 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
637 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
638 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
639 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
641 #define _cleanup_free_ _cleanup_(freep)
642 #define _cleanup_close_ _cleanup_(closep)
643 #define _cleanup_umask_ _cleanup_(umaskp)
644 #define _cleanup_globfree_ _cleanup_(globfree)
645 #define _cleanup_fclose_ _cleanup_(fclosep)
646 #define _cleanup_pclose_ _cleanup_(pclosep)
647 #define _cleanup_closedir_ _cleanup_(closedirp)
648 #define _cleanup_endmntent_ _cleanup_(endmntentp)
649 #define _cleanup_close_pair_ _cleanup_(close_pairp)
651 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
652 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
655 return malloc(a * b);
658 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
659 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
662 return memdup(p, a * b);
665 bool filename_is_safe(const char *p) _pure_;
666 bool path_is_safe(const char *p) _pure_;
667 bool string_is_safe(const char *p) _pure_;
668 bool string_has_cc(const char *p) _pure_;
671 * Check if a string contains any glob patterns.
673 _pure_ static inline bool string_is_glob(const char *p) {
674 return !!strpbrk(p, GLOB_CHARS);
677 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
678 int (*compar) (const void *, const void *, void *),
681 bool is_locale_utf8(void);
683 typedef enum DrawSpecialChar {
688 DRAW_TRIANGULAR_BULLET,
691 _DRAW_SPECIAL_CHAR_MAX
694 const char *draw_special_char(DrawSpecialChar ch);
696 char *strreplace(const char *text, const char *old_string, const char *new_string);
698 char *strip_tab_ansi(char **p, size_t *l);
700 int on_ac_power(void);
702 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
703 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
705 #define FOREACH_LINE(line, f, on_error) \
707 if (!fgets(line, sizeof(line), f)) { \
714 #define FOREACH_DIRENT(de, d, on_error) \
715 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
721 } else if (ignore_file((de)->d_name)) \
725 static inline void *mempset(void *s, int c, size_t n) {
727 return (uint8_t*)s + n;
730 char *hexmem(const void *p, size_t l);
731 void *unhexmem(const char *p, size_t l);
733 char *strextend(char **x, ...) _sentinel_;
734 char *strrep(const char *s, unsigned n);
736 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
737 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
738 #define GREEDY_REALLOC(array, allocated, need) \
739 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
741 #define GREEDY_REALLOC0(array, allocated, need) \
742 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
744 static inline void _reset_errno_(int *saved_errno) {
745 errno = *saved_errno;
748 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
750 struct _umask_struct_ {
755 static inline void _reset_umask_(struct _umask_struct_ *s) {
759 #define RUN_WITH_UMASK(mask) \
760 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
761 !_saved_umask_.quit ; \
762 _saved_umask_.quit = true)
764 static inline unsigned u64log2(uint64_t n) {
765 #if __SIZEOF_LONG_LONG__ == 8
766 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
772 static inline unsigned u32ctz(uint32_t n) {
773 #if __SIZEOF_INT__ == 4
774 return __builtin_ctz(n);
780 static inline int log2i(int x) {
783 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
786 static inline bool logind_running(void) {
787 return access("/run/systemd/seats/", F_OK) >= 0;
790 #define DECIMAL_STR_WIDTH(x) \
792 typeof(x) _x_ = (x); \
799 int unlink_noerrno(const char *path);
805 _new_ = alloca(_len_); \
806 (void *) memset(_new_, 0, _len_); \
809 #define strappenda(a, b) \
811 const char *_a_ = (a), *_b_ = (b); \
816 _c_ = alloca(_x_ + _y_ + 1); \
817 strcpy(stpcpy(_c_, _a_), _b_); \
821 #define strappenda3(a, b, c) \
823 const char *_a_ = (a), *_b_ = (b), *_c_ = (c); \
825 size_t _x_, _y_, _z_; \
829 _d_ = alloca(_x_ + _y_ + _z_ + 1); \
830 strcpy(stpcpy(stpcpy(_d_, _a_), _b_), _c_); \
834 #define procfs_file_alloca(pid, field) \
836 pid_t _pid_ = (pid); \
839 _r_ = ("/proc/self/" field); \
841 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
842 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
847 struct _locale_struct_ {
848 locale_t saved_locale;
853 static inline void _reset_locale_(struct _locale_struct_ *s) {
855 if (s->saved_locale != (locale_t) 0)
856 uselocale(s->saved_locale);
857 if (s->new_locale != (locale_t) 0)
858 freelocale(s->new_locale);
861 #define RUN_WITH_LOCALE(mask, loc) \
862 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
864 if (!_saved_locale_.quit) { \
866 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
867 if (_saved_locale_.new_locale != (locale_t) 0) \
868 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
870 !_saved_locale_.quit; }) ; \
871 _saved_locale_.quit = true)
873 bool id128_is_valid(const char *s) _pure_;
875 int split_pair(const char *s, const char *sep, char **l, char **r);
877 int shall_restore_state(void);
880 * Normal qsort requires base to be nonnull. Here were require
881 * that only if nmemb > 0.
883 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
884 int (*compar)(const void *, const void *)) {
887 qsort(base, nmemb, size, compar);
891 int proc_cmdline(char **ret);
892 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
894 int container_get_leader(const char *machine, pid_t *pid);
896 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd);
897 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd);
899 bool pid_is_alive(pid_t pid);
900 bool pid_is_unwaited(pid_t pid);
902 int getpeercred(int fd, struct ucred *ucred);
903 int getpeersec(int fd, char **ret);
905 int writev_safe(int fd, const struct iovec *w, int j);
907 int mkostemp_safe(char *pattern, int flags);
908 int open_tmpfile(const char *path, int flags);
910 int fd_warn_permissions(const char *path, int fd);
912 unsigned long personality_from_string(const char *p);
913 const char *personality_to_string(unsigned long);
915 uint64_t physical_memory(void);
917 char* mount_test_option(const char *haystack, const char *needle);
919 void hexdump(FILE *f, const void *p, size_t s);
921 union file_handle_union {
922 struct file_handle handle;
923 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
926 int update_reboot_param_file(const char *param);