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
70 #if SIZEOF_TIME_T == 8
71 # define PRI_TIME PRIu64
72 #elif SIZEOF_GID_T == 4
73 # define PRI_TIME PRIu32
75 # error Unknown time_t size
78 #if SIZEOF_RLIM_T == 8
79 # define RLIM_FMT "%" PRIu64
80 #elif SIZEOF_RLIM_T == 4
81 # define RLIM_FMT "%" PRIu32
83 # error Unknown rlim_t size
87 #include "time-util.h"
89 /* What is interpreted as whitespace? */
90 #define WHITESPACE " \t\n\r"
91 #define NEWLINE "\n\r"
94 #define GLOB_CHARS "*?["
96 /* What characters are special in the shell? */
97 /* must be escaped outside and inside double-quotes */
98 #define SHELL_NEED_ESCAPE "\"\\`$"
99 /* can be escaped or double-quoted */
100 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
102 #define FORMAT_BYTES_MAX 8
104 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
105 #define ANSI_RED_ON "\x1B[31m"
106 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
107 #define ANSI_GREEN_ON "\x1B[32m"
108 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
109 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
110 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
111 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
112 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
114 size_t page_size(void);
115 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
117 #define streq(a,b) (strcmp((a),(b)) == 0)
118 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
119 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
120 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
122 bool streq_ptr(const char *a, const char *b) _pure_;
124 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
126 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
128 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
130 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
132 #define malloc0(n) (calloc((n), 1))
134 static inline const char* yes_no(bool b) {
135 return b ? "yes" : "no";
138 static inline const char* true_false(bool b) {
139 return b ? "true" : "false";
142 static inline const char* strempty(const char *s) {
146 static inline const char* strnull(const char *s) {
147 return s ? s : "(null)";
150 static inline const char *strna(const char *s) {
151 return s ? s : "n/a";
154 static inline bool isempty(const char *p) {
158 static inline const char *startswith(const char *s, const char *prefix) {
159 if (strncmp(s, prefix, strlen(prefix)) == 0)
160 return s + strlen(prefix);
164 static inline const char *startswith_no_case(const char *s, const char *prefix) {
165 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
166 return s + strlen(prefix);
170 char *endswith(const char *s, const char *postfix) _pure_;
172 bool first_word(const char *s, const char *word) _pure_;
174 int close_nointr(int fd);
175 int safe_close(int fd);
176 void safe_close_pair(int p[]);
178 void close_many(const int fds[], unsigned n_fd);
180 int parse_size(const char *t, off_t base, off_t *size);
182 int parse_boolean(const char *v) _pure_;
183 int parse_pid(const char *s, pid_t* ret_pid);
184 int parse_uid(const char *s, uid_t* ret_uid);
185 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
187 int safe_atou(const char *s, unsigned *ret_u);
188 int safe_atoi(const char *s, int *ret_i);
190 int safe_atollu(const char *s, unsigned long long *ret_u);
191 int safe_atolli(const char *s, long long int *ret_i);
193 int safe_atod(const char *s, double *ret_d);
196 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
197 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
198 return safe_atou(s, (unsigned*) ret_u);
200 static inline int safe_atoli(const char *s, long int *ret_u) {
201 assert_cc(sizeof(long int) == sizeof(int));
202 return safe_atoi(s, (int*) ret_u);
205 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
206 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
207 return safe_atollu(s, (unsigned long long*) ret_u);
209 static inline int safe_atoli(const char *s, long int *ret_u) {
210 assert_cc(sizeof(long int) == sizeof(long long int));
211 return safe_atolli(s, (long long int*) ret_u);
215 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
216 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
217 return safe_atou(s, (unsigned*) ret_u);
220 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
221 assert_cc(sizeof(int32_t) == sizeof(int));
222 return safe_atoi(s, (int*) ret_i);
225 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
226 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
227 return safe_atollu(s, (unsigned long long*) ret_u);
230 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
231 assert_cc(sizeof(int64_t) == sizeof(long long int));
232 return safe_atolli(s, (long long int*) ret_i);
235 char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state);
237 #define FOREACH_WORD(word, length, s, state) \
238 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
240 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
241 _FOREACH_WORD(word, length, s, separator, false, state)
243 #define FOREACH_WORD_QUOTED(word, length, s, state) \
244 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
246 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
247 _FOREACH_WORD(word, length, s, separator, true, state)
249 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
250 for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state)))
252 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
253 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
255 char *strappend(const char *s, const char *suffix);
256 char *strnappend(const char *s, const char *suffix, size_t length);
258 char *replace_env(const char *format, char **env);
259 char **replace_env_argv(char **argv, char **env);
261 int readlinkat_malloc(int fd, const char *p, char **ret);
262 int readlink_malloc(const char *p, char **r);
263 int readlink_and_make_absolute(const char *p, char **r);
264 int readlink_and_canonicalize(const char *p, char **r);
266 int reset_all_signal_handlers(void);
268 char *strstrip(char *s);
269 char *delete_chars(char *s, const char *bad);
270 char *truncate_nl(char *s);
272 char *file_in_same_dir(const char *path, const char *filename);
274 int rmdir_parents(const char *path, const char *stop);
276 int get_process_state(pid_t pid);
277 int get_process_comm(pid_t pid, char **name);
278 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
279 int get_process_exe(pid_t pid, char **name);
280 int get_process_uid(pid_t pid, uid_t *uid);
281 int get_process_gid(pid_t pid, gid_t *gid);
282 int get_process_capeff(pid_t pid, char **capeff);
284 char hexchar(int x) _const_;
285 int unhexchar(char c) _const_;
286 char octchar(int x) _const_;
287 int unoctchar(char c) _const_;
288 char decchar(int x) _const_;
289 int undecchar(char c) _const_;
291 char *cescape(const char *s);
292 char *cunescape(const char *s);
293 char *cunescape_length(const char *s, size_t length);
294 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
296 char *xescape(const char *s, const char *bad);
298 char *ascii_strlower(char *path);
300 bool dirent_is_file(const struct dirent *de) _pure_;
301 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
303 bool ignore_file(const char *filename) _pure_;
305 bool chars_intersect(const char *a, const char *b) _pure_;
307 int make_stdio(int fd);
308 int make_null_stdio(void);
309 int make_console_stdio(void);
311 int dev_urandom(void *p, size_t n);
312 void random_bytes(void *p, size_t n);
314 static inline uint64_t random_u64(void) {
316 random_bytes(&u, sizeof(u));
320 static inline uint32_t random_u32(void) {
322 random_bytes(&u, sizeof(u));
326 /* For basic lookup tables with strictly enumerated entries */
327 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
328 scope const char *name##_to_string(type i) { \
329 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
331 return name##_table[i]; \
333 scope type name##_from_string(const char *s) { \
337 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
338 if (name##_table[i] && \
339 streq(name##_table[i], s)) \
343 struct __useless_struct_to_allow_trailing_semicolon__
345 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
346 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
348 /* For string conversions where numbers are also acceptable */
349 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
350 int name##_to_string_alloc(type i, char **str) { \
353 if (i < 0 || i > max) \
355 if (i < (type) ELEMENTSOF(name##_table)) { \
356 s = strdup(name##_table[i]); \
360 r = asprintf(&s, "%u", i); \
367 type name##_from_string(const char *s) { \
371 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
372 if (name##_table[i] && \
373 streq(name##_table[i], s)) \
375 if (safe_atou(s, &u) >= 0 && u <= max) \
379 struct __useless_struct_to_allow_trailing_semicolon__
381 int fd_nonblock(int fd, bool nonblock);
382 int fd_cloexec(int fd, bool cloexec);
384 int close_all_fds(const int except[], unsigned n_except);
386 bool fstype_is_network(const char *fstype);
390 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
391 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
392 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
394 int reset_terminal_fd(int fd, bool switch_to_text);
395 int reset_terminal(const char *name);
397 int open_terminal(const char *name, int mode);
398 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
399 int release_terminal(void);
401 int flush_fd(int fd);
403 int ignore_signals(int sig, ...);
404 int default_signals(int sig, ...);
405 int sigaction_many(const struct sigaction *sa, ...);
407 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
409 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
410 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
412 bool is_device_path(const char *path);
414 int dir_is_empty(const char *path);
415 char* dirname_malloc(const char *path);
417 void rename_process(const char name[8]);
419 void sigset_add_many(sigset_t *ss, ...);
420 int sigprocmask_many(int how, ...);
422 bool hostname_is_set(void);
424 char* gethostname_malloc(void);
425 char* getlogname_malloc(void);
426 char* getusername_malloc(void);
428 int getttyname_malloc(int fd, char **r);
429 int getttyname_harder(int fd, char **r);
431 int get_ctty_devnr(pid_t pid, dev_t *d);
432 int get_ctty(pid_t, dev_t *_devnr, char **r);
434 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
435 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
437 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
438 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
439 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
440 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
442 int pipe_eof(int fd);
444 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
446 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
447 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
449 int fd_columns(int fd);
450 unsigned columns(void);
451 int fd_lines(int fd);
452 unsigned lines(void);
453 void columns_lines_cache_reset(int _unused_ signum);
457 static inline const char *ansi_highlight(void) {
458 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
461 static inline const char *ansi_highlight_red(void) {
462 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
465 static inline const char *ansi_highlight_green(void) {
466 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
469 static inline const char *ansi_highlight_yellow(void) {
470 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
473 static inline const char *ansi_highlight_blue(void) {
474 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
477 static inline const char *ansi_highlight_off(void) {
478 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
481 int files_same(const char *filea, const char *fileb);
483 int running_in_chroot(void);
485 char *ellipsize(const char *s, size_t length, unsigned percent);
487 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
489 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
490 int touch(const char *path);
492 char *unquote(const char *s, const char *quotes);
493 char *normalize_env_assignment(const char *s);
495 int wait_for_terminate(pid_t pid, siginfo_t *status);
496 int wait_for_terminate_and_warn(const char *name, pid_t pid);
498 noreturn void freeze(void);
500 bool null_or_empty(struct stat *st) _pure_;
501 int null_or_empty_path(const char *fn);
503 DIR *xopendirat(int dirfd, const char *name, int flags);
505 char *fstab_node_to_udev_node(const char *p);
507 char *resolve_dev_console(char **active);
508 bool tty_is_vc(const char *tty);
509 bool tty_is_vc_resolve(const char *tty);
510 bool tty_is_console(const char *tty) _pure_;
511 int vtnr_from_tty(const char *tty);
512 const char *default_term_for_tty(const char *tty);
514 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
516 int kill_and_sigcont(pid_t pid, int sig);
518 bool nulstr_contains(const char*nulstr, const char *needle);
520 bool plymouth_running(void);
522 bool hostname_is_valid(const char *s) _pure_;
523 char* hostname_cleanup(char *s, bool lowercase);
525 bool machine_name_is_valid(const char *s) _pure_;
527 char* strshorten(char *s, size_t l);
529 int terminal_vhangup_fd(int fd);
530 int terminal_vhangup(const char *name);
532 int vt_disallocate(const char *name);
534 int symlink_atomic(const char *from, const char *to);
535 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
536 int mkfifo_atomic(const char *path, mode_t mode);
538 int fchmod_umask(int fd, mode_t mode);
540 bool display_is_local(const char *display) _pure_;
541 int socket_from_display(const char *display, char **path);
543 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
544 int get_group_creds(const char **groupname, gid_t *gid);
546 int in_gid(gid_t gid);
547 int in_group(const char *name);
549 char* uid_to_name(uid_t uid);
550 char* gid_to_name(gid_t gid);
552 int glob_exists(const char *path);
553 int glob_extend(char ***strv, const char *path);
555 int dirent_ensure_type(DIR *d, struct dirent *de);
557 int get_files_in_directory(const char *path, char ***list);
559 char *strjoin(const char *x, ...) _sentinel_;
561 bool is_main_thread(void);
563 static inline bool _pure_ in_charset(const char *s, const char* charset) {
566 return s[strspn(s, charset)] == '\0';
569 int block_get_whole_disk(dev_t d, dev_t *ret);
571 int file_is_priv_sticky(const char *p);
573 int strdup_or_null(const char *a, char **b);
575 #define NULSTR_FOREACH(i, l) \
576 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
578 #define NULSTR_FOREACH_PAIR(i, j, l) \
579 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
581 int ioprio_class_to_string_alloc(int i, char **s);
582 int ioprio_class_from_string(const char *s);
584 const char *sigchld_code_to_string(int i) _const_;
585 int sigchld_code_from_string(const char *s) _pure_;
587 int log_facility_unshifted_to_string_alloc(int i, char **s);
588 int log_facility_unshifted_from_string(const char *s);
590 int log_level_to_string_alloc(int i, char **s);
591 int log_level_from_string(const char *s);
593 int sched_policy_to_string_alloc(int i, char **s);
594 int sched_policy_from_string(const char *s);
596 const char *rlimit_to_string(int i) _const_;
597 int rlimit_from_string(const char *s) _pure_;
599 int ip_tos_to_string_alloc(int i, char **s);
600 int ip_tos_from_string(const char *s);
602 const char *signal_to_string(int i) _const_;
603 int signal_from_string(const char *s) _pure_;
605 int signal_from_string_try_harder(const char *s);
607 extern int saved_argc;
608 extern char **saved_argv;
610 bool kexec_loaded(void);
612 int prot_from_flags(int flags) _const_;
614 char *format_bytes(char *buf, size_t l, off_t t);
616 int fd_wait_for_event(int fd, int event, usec_t timeout);
618 void* memdup(const void *p, size_t l) _alloc_(2);
620 int is_kernel_thread(pid_t pid);
622 int fd_inc_sndbuf(int fd, size_t n);
623 int fd_inc_rcvbuf(int fd, size_t n);
625 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
627 int setrlimit_closest(int resource, const struct rlimit *rlim);
629 int getenv_for_pid(pid_t pid, const char *field, char **_value);
631 bool is_valid_documentation_url(const char *url) _pure_;
633 bool in_initrd(void);
635 void warn_melody(void);
637 int get_home_dir(char **ret);
638 int get_shell(char **_ret);
640 static inline void freep(void *p) {
644 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
645 static inline void func##p(type *p) { \
649 struct __useless_struct_to_allow_trailing_semicolon__
651 static inline void closep(int *fd) {
655 static inline void umaskp(mode_t *u) {
659 static inline void close_pairp(int (*p)[2]) {
663 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
664 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
665 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
666 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
668 #define _cleanup_free_ _cleanup_(freep)
669 #define _cleanup_close_ _cleanup_(closep)
670 #define _cleanup_umask_ _cleanup_(umaskp)
671 #define _cleanup_globfree_ _cleanup_(globfree)
672 #define _cleanup_fclose_ _cleanup_(fclosep)
673 #define _cleanup_pclose_ _cleanup_(pclosep)
674 #define _cleanup_closedir_ _cleanup_(closedirp)
675 #define _cleanup_endmntent_ _cleanup_(endmntentp)
676 #define _cleanup_close_pair_ _cleanup_(close_pairp)
678 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
679 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
682 return malloc(a * b);
685 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
686 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
689 return realloc(p, a * b);
692 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
693 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
696 return memdup(p, a * b);
699 bool filename_is_safe(const char *p) _pure_;
700 bool path_is_safe(const char *p) _pure_;
701 bool string_is_safe(const char *p) _pure_;
702 bool string_has_cc(const char *p, const char *ok) _pure_;
705 * Check if a string contains any glob patterns.
707 _pure_ static inline bool string_is_glob(const char *p) {
708 return !!strpbrk(p, GLOB_CHARS);
711 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
712 int (*compar) (const void *, const void *, void *),
715 bool is_locale_utf8(void);
717 typedef enum DrawSpecialChar {
722 DRAW_TRIANGULAR_BULLET,
726 _DRAW_SPECIAL_CHAR_MAX
729 const char *draw_special_char(DrawSpecialChar ch);
731 char *strreplace(const char *text, const char *old_string, const char *new_string);
733 char *strip_tab_ansi(char **p, size_t *l);
735 int on_ac_power(void);
737 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
738 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
740 #define FOREACH_LINE(line, f, on_error) \
742 if (!fgets(line, sizeof(line), f)) { \
749 #define FOREACH_DIRENT(de, d, on_error) \
750 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
756 } else if (ignore_file((de)->d_name)) \
760 static inline void *mempset(void *s, int c, size_t n) {
762 return (uint8_t*)s + n;
765 char *hexmem(const void *p, size_t l);
766 void *unhexmem(const char *p, size_t l);
768 char *strextend(char **x, ...) _sentinel_;
769 char *strrep(const char *s, unsigned n);
771 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
772 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
773 #define GREEDY_REALLOC(array, allocated, need) \
774 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
776 #define GREEDY_REALLOC0(array, allocated, need) \
777 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
779 static inline void _reset_errno_(int *saved_errno) {
780 errno = *saved_errno;
783 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
785 struct _umask_struct_ {
790 static inline void _reset_umask_(struct _umask_struct_ *s) {
794 #define RUN_WITH_UMASK(mask) \
795 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
796 !_saved_umask_.quit ; \
797 _saved_umask_.quit = true)
799 static inline unsigned u64log2(uint64_t n) {
800 #if __SIZEOF_LONG_LONG__ == 8
801 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
807 static inline unsigned u32ctz(uint32_t n) {
808 #if __SIZEOF_INT__ == 4
809 return __builtin_ctz(n);
815 static inline int log2i(int x) {
818 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
821 static inline bool logind_running(void) {
822 return access("/run/systemd/seats/", F_OK) >= 0;
825 #define DECIMAL_STR_WIDTH(x) \
827 typeof(x) _x_ = (x); \
834 int unlink_noerrno(const char *path);
840 _new_ = alloca(_len_); \
841 (void *) memset(_new_, 0, _len_); \
844 #define strappenda(a, b) \
846 const char *_a_ = (a), *_b_ = (b); \
851 _c_ = alloca(_x_ + _y_ + 1); \
852 strcpy(stpcpy(_c_, _a_), _b_); \
856 #define strappenda3(a, b, c) \
858 const char *_a_ = (a), *_b_ = (b), *_c_ = (c); \
860 size_t _x_, _y_, _z_; \
864 _d_ = alloca(_x_ + _y_ + _z_ + 1); \
865 strcpy(stpcpy(stpcpy(_d_, _a_), _b_), _c_); \
869 #define procfs_file_alloca(pid, field) \
871 pid_t _pid_ = (pid); \
874 _r_ = ("/proc/self/" field); \
876 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
877 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
882 struct _locale_struct_ {
883 locale_t saved_locale;
888 static inline void _reset_locale_(struct _locale_struct_ *s) {
890 if (s->saved_locale != (locale_t) 0)
891 uselocale(s->saved_locale);
892 if (s->new_locale != (locale_t) 0)
893 freelocale(s->new_locale);
896 #define RUN_WITH_LOCALE(mask, loc) \
897 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
899 if (!_saved_locale_.quit) { \
901 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
902 if (_saved_locale_.new_locale != (locale_t) 0) \
903 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
905 !_saved_locale_.quit; }) ; \
906 _saved_locale_.quit = true)
908 bool id128_is_valid(const char *s) _pure_;
910 int split_pair(const char *s, const char *sep, char **l, char **r);
912 int shall_restore_state(void);
915 * Normal qsort requires base to be nonnull. Here were require
916 * that only if nmemb > 0.
918 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
919 int (*compar)(const void *, const void *)) {
922 qsort(base, nmemb, size, compar);
926 int proc_cmdline(char **ret);
927 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
929 int container_get_leader(const char *machine, pid_t *pid);
931 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
932 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
934 bool pid_is_alive(pid_t pid);
935 bool pid_is_unwaited(pid_t pid);
937 int getpeercred(int fd, struct ucred *ucred);
938 int getpeersec(int fd, char **ret);
940 int writev_safe(int fd, const struct iovec *w, int j);
942 int mkostemp_safe(char *pattern, int flags);
943 int open_tmpfile(const char *path, int flags);
945 int fd_warn_permissions(const char *path, int fd);
947 unsigned long personality_from_string(const char *p);
948 const char *personality_to_string(unsigned long);
950 uint64_t physical_memory(void);
952 char* mount_test_option(const char *haystack, const char *needle);
954 void hexdump(FILE *f, const void *p, size_t s);
956 union file_handle_union {
957 struct file_handle handle;
958 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
961 int update_reboot_param_file(const char *param);
963 int umount_recursive(const char *target, int flags);
965 int bind_remount_recursive(const char *prefix, bool ro);
967 int fflush_and_check(FILE *f);
969 char *tempfn_xxxxxx(const char *p);
970 char *tempfn_random(const char *p);
972 bool is_localhost(const char *hostname);
974 int take_password_lock(const char *root);