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_TIME_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
88 #include "time-util.h"
90 /* What is interpreted as whitespace? */
91 #define WHITESPACE " \t\n\r"
92 #define NEWLINE "\n\r"
95 #define GLOB_CHARS "*?["
97 /* What characters are special in the shell? */
98 /* must be escaped outside and inside double-quotes */
99 #define SHELL_NEED_ESCAPE "\"\\`$"
100 /* can be escaped or double-quoted */
101 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
103 #define FORMAT_BYTES_MAX 8
105 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
106 #define ANSI_RED_ON "\x1B[31m"
107 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
108 #define ANSI_GREEN_ON "\x1B[32m"
109 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
110 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
111 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
112 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
113 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
115 size_t page_size(void);
116 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
118 #define streq(a,b) (strcmp((a),(b)) == 0)
119 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
120 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
121 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
123 bool streq_ptr(const char *a, const char *b) _pure_;
125 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
127 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
129 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
131 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
133 #define malloc0(n) (calloc((n), 1))
135 static inline const char* yes_no(bool b) {
136 return b ? "yes" : "no";
139 static inline const char* true_false(bool b) {
140 return b ? "true" : "false";
143 static inline const char* strempty(const char *s) {
147 static inline const char* strnull(const char *s) {
148 return s ? s : "(null)";
151 static inline const char *strna(const char *s) {
152 return s ? s : "n/a";
155 static inline bool isempty(const char *p) {
159 static inline const char *startswith(const char *s, const char *prefix) {
160 if (strncmp(s, prefix, strlen(prefix)) == 0)
161 return s + strlen(prefix);
165 static inline const char *startswith_no_case(const char *s, const char *prefix) {
166 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
167 return s + strlen(prefix);
171 char *endswith(const char *s, const char *postfix) _pure_;
173 char *first_word(const char *s, const char *word) _pure_;
175 int close_nointr(int fd);
176 int safe_close(int fd);
177 void safe_close_pair(int p[]);
179 void close_many(const int fds[], unsigned n_fd);
181 int parse_size(const char *t, off_t base, off_t *size);
183 int parse_boolean(const char *v) _pure_;
184 int parse_pid(const char *s, pid_t* ret_pid);
185 int parse_uid(const char *s, uid_t* ret_uid);
186 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
188 int safe_atou(const char *s, unsigned *ret_u);
189 int safe_atoi(const char *s, int *ret_i);
191 int safe_atollu(const char *s, unsigned long long *ret_u);
192 int safe_atolli(const char *s, long long int *ret_i);
194 int safe_atod(const char *s, double *ret_d);
196 int safe_atou8(const char *s, uint8_t *ret);
199 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
200 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
201 return safe_atou(s, (unsigned*) ret_u);
203 static inline int safe_atoli(const char *s, long int *ret_u) {
204 assert_cc(sizeof(long int) == sizeof(int));
205 return safe_atoi(s, (int*) ret_u);
208 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
209 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
210 return safe_atollu(s, (unsigned long long*) ret_u);
212 static inline int safe_atoli(const char *s, long int *ret_u) {
213 assert_cc(sizeof(long int) == sizeof(long long int));
214 return safe_atolli(s, (long long int*) ret_u);
218 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
219 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
220 return safe_atou(s, (unsigned*) ret_u);
223 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
224 assert_cc(sizeof(int32_t) == sizeof(int));
225 return safe_atoi(s, (int*) ret_i);
228 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
229 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
230 return safe_atollu(s, (unsigned long long*) ret_u);
233 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
234 assert_cc(sizeof(int64_t) == sizeof(long long int));
235 return safe_atolli(s, (long long int*) ret_i);
238 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
240 #define FOREACH_WORD(word, length, s, state) \
241 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
243 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
244 _FOREACH_WORD(word, length, s, separator, false, state)
246 #define FOREACH_WORD_QUOTED(word, length, s, state) \
247 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
249 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
250 _FOREACH_WORD(word, length, s, separator, true, state)
252 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
253 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
255 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
256 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
258 char *strappend(const char *s, const char *suffix);
259 char *strnappend(const char *s, const char *suffix, size_t length);
261 char *replace_env(const char *format, char **env);
262 char **replace_env_argv(char **argv, char **env);
264 int readlinkat_malloc(int fd, const char *p, char **ret);
265 int readlink_malloc(const char *p, char **r);
266 int readlink_and_make_absolute(const char *p, char **r);
267 int readlink_and_canonicalize(const char *p, char **r);
269 int reset_all_signal_handlers(void);
271 char *strstrip(char *s);
272 char *delete_chars(char *s, const char *bad);
273 char *truncate_nl(char *s);
275 char *file_in_same_dir(const char *path, const char *filename);
277 int rmdir_parents(const char *path, const char *stop);
279 int get_process_state(pid_t pid);
280 int get_process_comm(pid_t pid, char **name);
281 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
282 int get_process_exe(pid_t pid, char **name);
283 int get_process_uid(pid_t pid, uid_t *uid);
284 int get_process_gid(pid_t pid, gid_t *gid);
285 int get_process_capeff(pid_t pid, char **capeff);
287 char hexchar(int x) _const_;
288 int unhexchar(char c) _const_;
289 char octchar(int x) _const_;
290 int unoctchar(char c) _const_;
291 char decchar(int x) _const_;
292 int undecchar(char c) _const_;
294 char *cescape(const char *s);
295 char *cunescape(const char *s);
296 char *cunescape_length(const char *s, size_t length);
297 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
299 char *xescape(const char *s, const char *bad);
301 char *ascii_strlower(char *path);
303 bool dirent_is_file(const struct dirent *de) _pure_;
304 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
306 bool ignore_file(const char *filename) _pure_;
308 bool chars_intersect(const char *a, const char *b) _pure_;
310 int make_stdio(int fd);
311 int make_null_stdio(void);
312 int make_console_stdio(void);
314 int dev_urandom(void *p, size_t n);
315 void random_bytes(void *p, size_t n);
317 static inline uint64_t random_u64(void) {
319 random_bytes(&u, sizeof(u));
323 static inline uint32_t random_u32(void) {
325 random_bytes(&u, sizeof(u));
329 /* For basic lookup tables with strictly enumerated entries */
330 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
331 scope const char *name##_to_string(type i) { \
332 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
334 return name##_table[i]; \
336 scope type name##_from_string(const char *s) { \
340 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
341 if (name##_table[i] && \
342 streq(name##_table[i], s)) \
346 struct __useless_struct_to_allow_trailing_semicolon__
348 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
349 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
351 /* For string conversions where numbers are also acceptable */
352 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
353 int name##_to_string_alloc(type i, char **str) { \
356 if (i < 0 || i > max) \
358 if (i < (type) ELEMENTSOF(name##_table)) { \
359 s = strdup(name##_table[i]); \
363 r = asprintf(&s, "%u", i); \
370 type name##_from_string(const char *s) { \
374 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
375 if (name##_table[i] && \
376 streq(name##_table[i], s)) \
378 if (safe_atou(s, &u) >= 0 && u <= max) \
382 struct __useless_struct_to_allow_trailing_semicolon__
384 int fd_nonblock(int fd, bool nonblock);
385 int fd_cloexec(int fd, bool cloexec);
387 int close_all_fds(const int except[], unsigned n_except);
389 bool fstype_is_network(const char *fstype);
393 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
394 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
395 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
397 int reset_terminal_fd(int fd, bool switch_to_text);
398 int reset_terminal(const char *name);
400 int open_terminal(const char *name, int mode);
401 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
402 int release_terminal(void);
404 int flush_fd(int fd);
406 int ignore_signals(int sig, ...);
407 int default_signals(int sig, ...);
408 int sigaction_many(const struct sigaction *sa, ...);
410 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
412 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
413 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
415 bool is_device_path(const char *path);
417 int dir_is_empty(const char *path);
418 char* dirname_malloc(const char *path);
420 void rename_process(const char name[8]);
422 void sigset_add_many(sigset_t *ss, ...);
423 int sigprocmask_many(int how, ...);
425 bool hostname_is_set(void);
427 char* gethostname_malloc(void);
428 char* getlogname_malloc(void);
429 char* getusername_malloc(void);
431 int getttyname_malloc(int fd, char **r);
432 int getttyname_harder(int fd, char **r);
434 int get_ctty_devnr(pid_t pid, dev_t *d);
435 int get_ctty(pid_t, dev_t *_devnr, char **r);
437 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
438 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
440 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
441 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
442 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
443 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
445 int pipe_eof(int fd);
447 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
449 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
450 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
452 int fd_columns(int fd);
453 unsigned columns(void);
454 int fd_lines(int fd);
455 unsigned lines(void);
456 void columns_lines_cache_reset(int _unused_ signum);
460 static inline const char *ansi_highlight(void) {
461 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
464 static inline const char *ansi_highlight_red(void) {
465 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
468 static inline const char *ansi_highlight_green(void) {
469 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
472 static inline const char *ansi_highlight_yellow(void) {
473 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
476 static inline const char *ansi_highlight_blue(void) {
477 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
480 static inline const char *ansi_highlight_off(void) {
481 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
484 int files_same(const char *filea, const char *fileb);
486 int running_in_chroot(void);
488 char *ellipsize(const char *s, size_t length, unsigned percent);
490 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
492 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
493 int touch(const char *path);
495 char *unquote(const char *s, const char *quotes);
496 char *normalize_env_assignment(const char *s);
498 int wait_for_terminate(pid_t pid, siginfo_t *status);
499 int wait_for_terminate_and_warn(const char *name, pid_t pid);
501 noreturn void freeze(void);
503 bool null_or_empty(struct stat *st) _pure_;
504 int null_or_empty_path(const char *fn);
505 int null_or_empty_fd(int fd);
507 DIR *xopendirat(int dirfd, const char *name, int flags);
509 char *fstab_node_to_udev_node(const char *p);
511 char *resolve_dev_console(char **active);
512 bool tty_is_vc(const char *tty);
513 bool tty_is_vc_resolve(const char *tty);
514 bool tty_is_console(const char *tty) _pure_;
515 int vtnr_from_tty(const char *tty);
516 const char *default_term_for_tty(const char *tty);
518 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
520 int kill_and_sigcont(pid_t pid, int sig);
522 bool nulstr_contains(const char*nulstr, const char *needle);
524 bool plymouth_running(void);
526 bool hostname_is_valid(const char *s) _pure_;
527 char* hostname_cleanup(char *s, bool lowercase);
529 bool machine_name_is_valid(const char *s) _pure_;
531 char* strshorten(char *s, size_t l);
533 int terminal_vhangup_fd(int fd);
534 int terminal_vhangup(const char *name);
536 int vt_disallocate(const char *name);
538 int symlink_atomic(const char *from, const char *to);
539 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
540 int mkfifo_atomic(const char *path, mode_t mode);
542 int fchmod_umask(int fd, mode_t mode);
544 bool display_is_local(const char *display) _pure_;
545 int socket_from_display(const char *display, char **path);
547 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
548 int get_group_creds(const char **groupname, gid_t *gid);
550 int in_gid(gid_t gid);
551 int in_group(const char *name);
553 char* uid_to_name(uid_t uid);
554 char* gid_to_name(gid_t gid);
556 int glob_exists(const char *path);
557 int glob_extend(char ***strv, const char *path);
559 int dirent_ensure_type(DIR *d, struct dirent *de);
561 int get_files_in_directory(const char *path, char ***list);
563 char *strjoin(const char *x, ...) _sentinel_;
565 bool is_main_thread(void);
567 static inline bool _pure_ in_charset(const char *s, const char* charset) {
570 return s[strspn(s, charset)] == '\0';
573 int block_get_whole_disk(dev_t d, dev_t *ret);
575 int file_is_priv_sticky(const char *p);
577 int strdup_or_null(const char *a, char **b);
579 #define NULSTR_FOREACH(i, l) \
580 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
582 #define NULSTR_FOREACH_PAIR(i, j, l) \
583 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
585 int ioprio_class_to_string_alloc(int i, char **s);
586 int ioprio_class_from_string(const char *s);
588 const char *sigchld_code_to_string(int i) _const_;
589 int sigchld_code_from_string(const char *s) _pure_;
591 int log_facility_unshifted_to_string_alloc(int i, char **s);
592 int log_facility_unshifted_from_string(const char *s);
594 int log_level_to_string_alloc(int i, char **s);
595 int log_level_from_string(const char *s);
597 int sched_policy_to_string_alloc(int i, char **s);
598 int sched_policy_from_string(const char *s);
600 const char *rlimit_to_string(int i) _const_;
601 int rlimit_from_string(const char *s) _pure_;
603 int ip_tos_to_string_alloc(int i, char **s);
604 int ip_tos_from_string(const char *s);
606 const char *signal_to_string(int i) _const_;
607 int signal_from_string(const char *s) _pure_;
609 int signal_from_string_try_harder(const char *s);
611 extern int saved_argc;
612 extern char **saved_argv;
614 bool kexec_loaded(void);
616 int prot_from_flags(int flags) _const_;
618 char *format_bytes(char *buf, size_t l, off_t t);
620 int fd_wait_for_event(int fd, int event, usec_t timeout);
622 void* memdup(const void *p, size_t l) _alloc_(2);
624 int is_kernel_thread(pid_t pid);
626 int fd_inc_sndbuf(int fd, size_t n);
627 int fd_inc_rcvbuf(int fd, size_t n);
629 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
631 int setrlimit_closest(int resource, const struct rlimit *rlim);
633 int getenv_for_pid(pid_t pid, const char *field, char **_value);
635 bool is_valid_documentation_url(const char *url) _pure_;
637 bool in_initrd(void);
639 void warn_melody(void);
641 int get_home_dir(char **ret);
642 int get_shell(char **_ret);
644 static inline void freep(void *p) {
648 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
649 static inline void func##p(type *p) { \
653 struct __useless_struct_to_allow_trailing_semicolon__
655 static inline void closep(int *fd) {
659 static inline void umaskp(mode_t *u) {
663 static inline void close_pairp(int (*p)[2]) {
667 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
668 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
669 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
670 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
672 #define _cleanup_free_ _cleanup_(freep)
673 #define _cleanup_close_ _cleanup_(closep)
674 #define _cleanup_umask_ _cleanup_(umaskp)
675 #define _cleanup_globfree_ _cleanup_(globfree)
676 #define _cleanup_fclose_ _cleanup_(fclosep)
677 #define _cleanup_pclose_ _cleanup_(pclosep)
678 #define _cleanup_closedir_ _cleanup_(closedirp)
679 #define _cleanup_endmntent_ _cleanup_(endmntentp)
680 #define _cleanup_close_pair_ _cleanup_(close_pairp)
682 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
683 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
686 return malloc(a * b);
689 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
690 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
693 return realloc(p, a * b);
696 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
697 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
700 return memdup(p, a * b);
703 bool filename_is_safe(const char *p) _pure_;
704 bool path_is_safe(const char *p) _pure_;
705 bool string_is_safe(const char *p) _pure_;
706 bool string_has_cc(const char *p, const char *ok) _pure_;
709 * Check if a string contains any glob patterns.
711 _pure_ static inline bool string_is_glob(const char *p) {
712 return !!strpbrk(p, GLOB_CHARS);
715 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
716 int (*compar) (const void *, const void *, void *),
719 bool is_locale_utf8(void);
721 typedef enum DrawSpecialChar {
726 DRAW_TRIANGULAR_BULLET,
730 _DRAW_SPECIAL_CHAR_MAX
733 const char *draw_special_char(DrawSpecialChar ch);
735 char *strreplace(const char *text, const char *old_string, const char *new_string);
737 char *strip_tab_ansi(char **p, size_t *l);
739 int on_ac_power(void);
741 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
742 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
744 #define FOREACH_LINE(line, f, on_error) \
746 if (!fgets(line, sizeof(line), f)) { \
753 #define FOREACH_DIRENT(de, d, on_error) \
754 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
760 } else if (ignore_file((de)->d_name)) \
764 static inline void *mempset(void *s, int c, size_t n) {
766 return (uint8_t*)s + n;
769 char *hexmem(const void *p, size_t l);
770 void *unhexmem(const char *p, size_t l);
772 char *strextend(char **x, ...) _sentinel_;
773 char *strrep(const char *s, unsigned n);
775 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
776 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
777 #define GREEDY_REALLOC(array, allocated, need) \
778 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
780 #define GREEDY_REALLOC0(array, allocated, need) \
781 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
783 static inline void _reset_errno_(int *saved_errno) {
784 errno = *saved_errno;
787 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
789 struct _umask_struct_ {
794 static inline void _reset_umask_(struct _umask_struct_ *s) {
798 #define RUN_WITH_UMASK(mask) \
799 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
800 !_saved_umask_.quit ; \
801 _saved_umask_.quit = true)
803 static inline unsigned u64log2(uint64_t n) {
804 #if __SIZEOF_LONG_LONG__ == 8
805 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
811 static inline unsigned u32ctz(uint32_t n) {
812 #if __SIZEOF_INT__ == 4
813 return __builtin_ctz(n);
819 static inline int log2i(int x) {
822 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
825 static inline bool logind_running(void) {
826 return access("/run/systemd/seats/", F_OK) >= 0;
829 #define DECIMAL_STR_WIDTH(x) \
831 typeof(x) _x_ = (x); \
838 int unlink_noerrno(const char *path);
844 _new_ = alloca(_len_); \
845 (void *) memset(_new_, 0, _len_); \
848 #define strappenda(a, ...) \
850 int _len = strlen(a); \
853 const char *_appendees_[] = { __VA_ARGS__ }; \
854 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
855 _len += strlen(_appendees_[_i]); \
856 _d_ = alloca(_len + 1); \
857 _p_ = stpcpy(_d_, a); \
858 for (_i = 0; _i < ELEMENTSOF(_appendees_); _i++) \
859 _p_ = stpcpy(_p_, _appendees_[_i]); \
863 #define procfs_file_alloca(pid, field) \
865 pid_t _pid_ = (pid); \
868 _r_ = ("/proc/self/" field); \
870 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
871 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
876 struct _locale_struct_ {
877 locale_t saved_locale;
882 static inline void _reset_locale_(struct _locale_struct_ *s) {
884 if (s->saved_locale != (locale_t) 0)
885 uselocale(s->saved_locale);
886 if (s->new_locale != (locale_t) 0)
887 freelocale(s->new_locale);
890 #define RUN_WITH_LOCALE(mask, loc) \
891 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
893 if (!_saved_locale_.quit) { \
895 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
896 if (_saved_locale_.new_locale != (locale_t) 0) \
897 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
899 !_saved_locale_.quit; }) ; \
900 _saved_locale_.quit = true)
902 bool id128_is_valid(const char *s) _pure_;
904 int split_pair(const char *s, const char *sep, char **l, char **r);
906 int shall_restore_state(void);
909 * Normal qsort requires base to be nonnull. Here were require
910 * that only if nmemb > 0.
912 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
913 int (*compar)(const void *, const void *)) {
916 qsort(base, nmemb, size, compar);
920 int proc_cmdline(char **ret);
921 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
923 int container_get_leader(const char *machine, pid_t *pid);
925 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
926 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
928 bool pid_is_alive(pid_t pid);
929 bool pid_is_unwaited(pid_t pid);
931 int getpeercred(int fd, struct ucred *ucred);
932 int getpeersec(int fd, char **ret);
934 int writev_safe(int fd, const struct iovec *w, int j);
936 int mkostemp_safe(char *pattern, int flags);
937 int open_tmpfile(const char *path, int flags);
939 int fd_warn_permissions(const char *path, int fd);
941 unsigned long personality_from_string(const char *p);
942 const char *personality_to_string(unsigned long);
944 uint64_t physical_memory(void);
946 char* mount_test_option(const char *haystack, const char *needle);
948 void hexdump(FILE *f, const void *p, size_t s);
950 union file_handle_union {
951 struct file_handle handle;
952 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
955 int update_reboot_param_file(const char *param);
957 int umount_recursive(const char *target, int flags);
959 int bind_remount_recursive(const char *prefix, bool ro);
961 int fflush_and_check(FILE *f);
963 char *tempfn_xxxxxx(const char *p);
964 char *tempfn_random(const char *p);
966 bool is_localhost(const char *hostname);
968 int take_password_lock(const char *root);
970 int is_symlink(const char *path);