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>
36 #include <sys/socket.h>
43 #include <sys/inotify.h>
44 #include <sys/statfs.h>
48 #include "time-util.h"
49 #include "formats-util.h"
51 /* What is interpreted as whitespace? */
52 #define WHITESPACE " \t\n\r"
53 #define NEWLINE "\n\r"
56 #define GLOB_CHARS "*?["
58 /* What characters are special in the shell? */
59 /* must be escaped outside and inside double-quotes */
60 #define SHELL_NEED_ESCAPE "\"\\`$"
61 /* can be escaped or double-quoted */
62 #define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
64 #define FORMAT_BYTES_MAX 8
66 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
67 #define ANSI_RED_ON "\x1B[31m"
68 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
69 #define ANSI_GREEN_ON "\x1B[32m"
70 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
71 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
72 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
73 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
74 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
76 size_t page_size(void) _pure_;
77 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
79 #define streq(a,b) (strcmp((a),(b)) == 0)
80 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
81 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
82 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
84 bool streq_ptr(const char *a, const char *b) _pure_;
86 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
88 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
90 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
92 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
94 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
96 #define malloc0(n) (calloc((n), 1))
98 static inline const char* yes_no(bool b) {
99 return b ? "yes" : "no";
102 static inline const char* true_false(bool b) {
103 return b ? "true" : "false";
106 static inline const char* one_zero(bool b) {
107 return b ? "1" : "0";
110 static inline const char* strempty(const char *s) {
114 static inline const char* strnull(const char *s) {
115 return s ? s : "(null)";
118 static inline const char *strna(const char *s) {
119 return s ? s : "n/a";
122 static inline bool isempty(const char *p) {
126 static inline char *startswith(const char *s, const char *prefix) {
130 if (strncmp(s, prefix, l) == 0)
131 return (char*) s + l;
136 static inline char *startswith_no_case(const char *s, const char *prefix) {
140 if (strncasecmp(s, prefix, l) == 0)
141 return (char*) s + l;
146 char *endswith(const char *s, const char *postfix) _pure_;
147 char *endswith_no_case(const char *s, const char *postfix) _pure_;
149 char *first_word(const char *s, const char *word) _pure_;
151 int close_nointr(int fd);
152 int safe_close(int fd);
153 void safe_close_pair(int p[]);
155 void close_many(const int fds[], unsigned n_fd);
157 int parse_size(const char *t, off_t base, off_t *size);
159 int parse_boolean(const char *v) _pure_;
160 int parse_pid(const char *s, pid_t* ret_pid);
161 int parse_uid(const char *s, uid_t* ret_uid);
162 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
164 int safe_atou(const char *s, unsigned *ret_u);
165 int safe_atoi(const char *s, int *ret_i);
167 int safe_atollu(const char *s, unsigned long long *ret_u);
168 int safe_atolli(const char *s, long long int *ret_i);
170 int safe_atod(const char *s, double *ret_d);
172 int safe_atou8(const char *s, uint8_t *ret);
174 #if LONG_MAX == INT_MAX
175 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
176 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
177 return safe_atou(s, (unsigned*) ret_u);
179 static inline int safe_atoli(const char *s, long int *ret_u) {
180 assert_cc(sizeof(long int) == sizeof(int));
181 return safe_atoi(s, (int*) ret_u);
184 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
185 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
186 return safe_atollu(s, (unsigned long long*) ret_u);
188 static inline int safe_atoli(const char *s, long int *ret_u) {
189 assert_cc(sizeof(long int) == sizeof(long long int));
190 return safe_atolli(s, (long long int*) ret_u);
194 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
195 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
196 return safe_atou(s, (unsigned*) ret_u);
199 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
200 assert_cc(sizeof(int32_t) == sizeof(int));
201 return safe_atoi(s, (int*) ret_i);
204 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
205 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
206 return safe_atollu(s, (unsigned long long*) ret_u);
209 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
210 assert_cc(sizeof(int64_t) == sizeof(long long int));
211 return safe_atolli(s, (long long int*) ret_i);
214 int safe_atou16(const char *s, uint16_t *ret);
215 int safe_atoi16(const char *s, int16_t *ret);
217 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
219 #define FOREACH_WORD(word, length, s, state) \
220 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
222 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
223 _FOREACH_WORD(word, length, s, separator, false, state)
225 #define FOREACH_WORD_QUOTED(word, length, s, state) \
226 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
228 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
229 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
231 char *strappend(const char *s, const char *suffix);
232 char *strnappend(const char *s, const char *suffix, size_t length);
234 char *replace_env(const char *format, char **env);
235 char **replace_env_argv(char **argv, char **env);
237 int readlinkat_malloc(int fd, const char *p, char **ret);
238 int readlink_malloc(const char *p, char **r);
239 int readlink_value(const char *p, char **ret);
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);
244 int reset_signal_mask(void);
246 char *strstrip(char *s);
247 char *delete_chars(char *s, const char *bad);
248 char *truncate_nl(char *s);
250 char *file_in_same_dir(const char *path, const char *filename);
252 int rmdir_parents(const char *path, const char *stop);
254 char hexchar(int x) _const_;
255 int unhexchar(char c) _const_;
256 char octchar(int x) _const_;
257 int unoctchar(char c) _const_;
258 char decchar(int x) _const_;
259 int undecchar(char c) _const_;
261 char *cescape(const char *s);
262 size_t cescape_char(char c, char *buf);
264 typedef enum UnescapeFlags {
268 int cunescape(const char *s, UnescapeFlags flags, char **ret);
269 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
270 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
272 char *xescape(const char *s, const char *bad);
274 char *ascii_strlower(char *path);
276 bool dirent_is_file(const struct dirent *de) _pure_;
277 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
279 bool hidden_file(const char *filename) _pure_;
281 bool chars_intersect(const char *a, const char *b) _pure_;
283 int make_stdio(int fd);
284 int make_null_stdio(void);
285 int make_console_stdio(void);
287 int dev_urandom(void *p, size_t n);
288 void random_bytes(void *p, size_t n);
289 void initialize_srand(void);
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_TO_STRING(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]; \
311 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
313 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
314 scope inline type name##_from_string(const char *s) { \
315 return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
318 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
319 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
320 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
321 struct __useless_struct_to_allow_trailing_semicolon__
323 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
324 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
325 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
326 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
328 /* For string conversions where numbers are also acceptable */
329 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
330 int name##_to_string_alloc(type i, char **str) { \
333 if (i < 0 || i > max) \
335 if (i < (type) ELEMENTSOF(name##_table)) { \
336 s = strdup(name##_table[i]); \
340 r = asprintf(&s, "%i", i); \
347 type name##_from_string(const char *s) { \
351 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
352 if (name##_table[i] && \
353 streq(name##_table[i], s)) \
355 if (safe_atou(s, &u) >= 0 && u <= max) \
359 struct __useless_struct_to_allow_trailing_semicolon__
361 int fd_nonblock(int fd, bool nonblock);
362 int fd_cloexec(int fd, bool cloexec);
364 int close_all_fds(const int except[], unsigned n_except);
366 bool fstype_is_network(const char *fstype);
370 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
371 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
372 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
374 int reset_terminal_fd(int fd, bool switch_to_text);
375 int reset_terminal(const char *name);
377 int open_terminal(const char *name, int mode);
378 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
379 int release_terminal(void);
381 int flush_fd(int fd);
383 int ignore_signals(int sig, ...);
384 int default_signals(int sig, ...);
385 int sigaction_many(const struct sigaction *sa, ...);
387 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
389 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
390 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
391 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
393 bool is_device_path(const char *path);
395 int dir_is_empty(const char *path);
396 char* dirname_malloc(const char *path);
398 void sigset_add_many(sigset_t *ss, ...);
399 int sigprocmask_many(int how, ...);
401 bool hostname_is_set(void);
403 char* lookup_uid(uid_t uid);
404 char* gethostname_malloc(void);
405 char* getlogname_malloc(void);
406 char* getusername_malloc(void);
408 int getttyname_malloc(int fd, char **r);
409 int getttyname_harder(int fd, char **r);
411 int get_ctty_devnr(pid_t pid, dev_t *d);
412 int get_ctty(pid_t, dev_t *_devnr, char **r);
414 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
415 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
417 bool is_temporary_fs(const struct statfs *s) _pure_;
418 int fd_is_temporary_fs(int fd);
420 int pipe_eof(int fd);
422 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
424 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
425 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
427 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
429 int fd_columns(int fd);
430 unsigned columns(void);
431 int fd_lines(int fd);
432 unsigned lines(void);
433 void columns_lines_cache_reset(int _unused_ signum);
437 static inline const char *ansi_highlight(void) {
438 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
441 static inline const char *ansi_highlight_red(void) {
442 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
445 static inline const char *ansi_highlight_green(void) {
446 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
449 static inline const char *ansi_highlight_yellow(void) {
450 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
453 static inline const char *ansi_highlight_blue(void) {
454 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
457 static inline const char *ansi_highlight_off(void) {
458 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
461 int files_same(const char *filea, const char *fileb);
463 int running_in_chroot(void);
465 char *ellipsize(const char *s, size_t length, unsigned percent);
467 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
469 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
470 int touch(const char *path);
472 noreturn void freeze(void);
474 bool null_or_empty(struct stat *st) _pure_;
475 int null_or_empty_path(const char *fn);
476 int null_or_empty_fd(int fd);
478 DIR *xopendirat(int dirfd, const char *name, int flags);
480 char *fstab_node_to_udev_node(const char *p);
482 char *resolve_dev_console(char **active);
483 bool tty_is_vc(const char *tty);
484 bool tty_is_vc_resolve(const char *tty);
485 bool tty_is_console(const char *tty) _pure_;
486 int vtnr_from_tty(const char *tty);
487 const char *default_term_for_tty(const char *tty);
489 void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
491 bool nulstr_contains(const char*nulstr, const char *needle);
493 bool plymouth_running(void);
495 bool hostname_is_valid(const char *s) _pure_;
496 char* hostname_cleanup(char *s, bool lowercase);
498 bool machine_name_is_valid(const char *s) _pure_;
500 char* strshorten(char *s, size_t l);
502 int terminal_vhangup_fd(int fd);
503 int terminal_vhangup(const char *name);
505 int vt_disallocate(const char *name);
507 int symlink_atomic(const char *from, const char *to);
508 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
509 int mkfifo_atomic(const char *path, mode_t mode);
511 int fchmod_umask(int fd, mode_t mode);
513 bool display_is_local(const char *display) _pure_;
514 int socket_from_display(const char *display, char **path);
516 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
517 int get_group_creds(const char **groupname, gid_t *gid);
519 int in_gid(gid_t gid);
520 int in_group(const char *name);
522 char* uid_to_name(uid_t uid);
523 char* gid_to_name(gid_t gid);
525 int glob_exists(const char *path);
526 int glob_extend(char ***strv, const char *path);
528 int dirent_ensure_type(DIR *d, struct dirent *de);
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 #define NULSTR_FOREACH(i, l) \
545 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
547 #define NULSTR_FOREACH_PAIR(i, j, l) \
548 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
550 int ioprio_class_to_string_alloc(int i, char **s);
551 int ioprio_class_from_string(const char *s);
553 const char *sigchld_code_to_string(int i) _const_;
554 int sigchld_code_from_string(const char *s) _pure_;
556 int log_facility_unshifted_to_string_alloc(int i, char **s);
557 int log_facility_unshifted_from_string(const char *s);
559 int log_level_to_string_alloc(int i, char **s);
560 int log_level_from_string(const char *s);
562 int sched_policy_to_string_alloc(int i, char **s);
563 int sched_policy_from_string(const char *s);
565 const char *rlimit_to_string(int i) _const_;
566 int rlimit_from_string(const char *s) _pure_;
568 int ip_tos_to_string_alloc(int i, char **s);
569 int ip_tos_from_string(const char *s);
571 const char *signal_to_string(int i) _const_;
572 int signal_from_string(const char *s) _pure_;
574 int signal_from_string_try_harder(const char *s);
576 extern int saved_argc;
577 extern char **saved_argv;
579 bool kexec_loaded(void);
581 int prot_from_flags(int flags) _const_;
583 char *format_bytes(char *buf, size_t l, off_t t);
585 int fd_wait_for_event(int fd, int event, usec_t timeout);
587 void* memdup(const void *p, size_t l) _alloc_(2);
589 int fd_inc_sndbuf(int fd, size_t n);
590 int fd_inc_rcvbuf(int fd, size_t n);
592 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
594 int setrlimit_closest(int resource, const struct rlimit *rlim);
596 bool http_url_is_valid(const char *url) _pure_;
597 bool documentation_url_is_valid(const char *url) _pure_;
599 bool http_etag_is_valid(const char *etag);
601 bool in_initrd(void);
603 void warn_melody(void);
605 int get_home_dir(char **ret);
606 int get_shell(char **_ret);
608 static inline void freep(void *p) {
612 static inline void closep(int *fd) {
616 static inline void umaskp(mode_t *u) {
620 static inline void close_pairp(int (*p)[2]) {
624 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
625 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
626 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
627 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
629 #define _cleanup_free_ _cleanup_(freep)
630 #define _cleanup_close_ _cleanup_(closep)
631 #define _cleanup_umask_ _cleanup_(umaskp)
632 #define _cleanup_globfree_ _cleanup_(globfree)
633 #define _cleanup_fclose_ _cleanup_(fclosep)
634 #define _cleanup_pclose_ _cleanup_(pclosep)
635 #define _cleanup_closedir_ _cleanup_(closedirp)
636 #define _cleanup_endmntent_ _cleanup_(endmntentp)
637 #define _cleanup_close_pair_ _cleanup_(close_pairp)
639 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
640 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
643 return malloc(a * b);
646 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
647 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
650 return realloc(p, a * b);
653 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
654 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
657 return memdup(p, a * b);
660 bool filename_is_valid(const char *p) _pure_;
661 bool path_is_safe(const char *p) _pure_;
662 bool string_is_safe(const char *p) _pure_;
663 bool string_has_cc(const char *p, const char *ok) _pure_;
666 * Check if a string contains any glob patterns.
668 _pure_ static inline bool string_is_glob(const char *p) {
669 return !!strpbrk(p, GLOB_CHARS);
672 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
673 int (*compar) (const void *, const void *, void *),
676 #define _(String) gettext (String)
677 void init_gettext(void);
678 bool is_locale_utf8(void);
680 typedef enum DrawSpecialChar {
685 DRAW_TRIANGULAR_BULLET,
689 _DRAW_SPECIAL_CHAR_MAX
692 const char *draw_special_char(DrawSpecialChar ch);
694 char *strreplace(const char *text, const char *old_string, const char *new_string);
696 char *strip_tab_ansi(char **p, size_t *l);
698 int on_ac_power(void);
700 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
701 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
703 #define FOREACH_LINE(line, f, on_error) \
705 if (!fgets(line, sizeof(line), f)) { \
712 #define FOREACH_DIRENT(de, d, on_error) \
713 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
719 } else if (hidden_file((de)->d_name)) \
723 #define FOREACH_DIRENT_ALL(de, d, on_error) \
724 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
732 static inline void *mempset(void *s, int c, size_t n) {
734 return (uint8_t*)s + n;
737 char *hexmem(const void *p, size_t l);
738 void *unhexmem(const char *p, size_t l);
740 char *strextend(char **x, ...) _sentinel_;
741 char *strrep(const char *s, unsigned n);
743 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
744 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
745 #define GREEDY_REALLOC(array, allocated, need) \
746 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
748 #define GREEDY_REALLOC0(array, allocated, need) \
749 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
751 static inline void _reset_errno_(int *saved_errno) {
752 errno = *saved_errno;
755 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
757 static inline int negative_errno(void) {
758 /* This helper should be used to shut up gcc if you know 'errno' is
759 * negative. Instead of "return -errno;", use "return negative_errno();"
760 * It will suppress bogus gcc warnings in case it assumes 'errno' might
761 * be 0 and thus the caller's error-handling might not be triggered. */
762 assert_return(errno > 0, -EINVAL);
766 struct _umask_struct_ {
771 static inline void _reset_umask_(struct _umask_struct_ *s) {
775 #define RUN_WITH_UMASK(mask) \
776 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
777 !_saved_umask_.quit ; \
778 _saved_umask_.quit = true)
780 static inline unsigned u64log2(uint64_t n) {
781 #if __SIZEOF_LONG_LONG__ == 8
782 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
788 static inline unsigned u32ctz(uint32_t n) {
789 #if __SIZEOF_INT__ == 4
790 return __builtin_ctz(n);
796 static inline unsigned log2i(int x) {
799 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
802 static inline unsigned log2u(unsigned x) {
805 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
808 static inline unsigned log2u_round_up(unsigned x) {
814 return log2u(x - 1) + 1;
817 static inline bool logind_running(void) {
818 return access("/run/systemd/seats/", F_OK) >= 0;
821 #define DECIMAL_STR_WIDTH(x) \
823 typeof(x) _x_ = (x); \
830 int unlink_noerrno(const char *path);
836 _new_ = alloca(_len_); \
837 (void *) memset(_new_, 0, _len_); \
840 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
841 #define alloca_align(size, align) \
844 size_t _mask_ = (align) - 1; \
845 _ptr_ = alloca((size) + _mask_); \
846 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
849 #define alloca0_align(size, align) \
852 size_t _size_ = (size); \
853 _new_ = alloca_align(_size_, (align)); \
854 (void*)memset(_new_, 0, _size_); \
857 #define strjoina(a, ...) \
859 const char *_appendees_[] = { a, __VA_ARGS__ }; \
863 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
864 _len_ += strlen(_appendees_[_i_]); \
865 _p_ = _d_ = alloca(_len_ + 1); \
866 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
867 _p_ = stpcpy(_p_, _appendees_[_i_]); \
872 bool id128_is_valid(const char *s) _pure_;
874 int split_pair(const char *s, const char *sep, char **l, char **r);
876 int shall_restore_state(void);
879 * Normal qsort requires base to be nonnull. Here were require
880 * that only if nmemb > 0.
882 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
883 int (*compar)(const void *, const void *)) {
886 qsort(base, nmemb, size, compar);
890 int proc_cmdline(char **ret);
891 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
892 int get_proc_cmdline_key(const char *parameter, 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 *netns_fd, int *root_fd);
897 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
899 int getpeercred(int fd, struct ucred *ucred);
900 int getpeersec(int fd, char **ret);
902 int writev_safe(int fd, const struct iovec *w, int j);
904 int mkostemp_safe(char *pattern, int flags);
905 int open_tmpfile(const char *path, int flags);
907 int fd_warn_permissions(const char *path, int fd);
909 unsigned long personality_from_string(const char *p);
910 const char *personality_to_string(unsigned long);
912 uint64_t physical_memory(void);
914 void hexdump(FILE *f, const void *p, size_t s);
916 union file_handle_union {
917 struct file_handle handle;
918 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
920 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
922 int update_reboot_param_file(const char *param);
924 int umount_recursive(const char *target, int flags);
926 int bind_remount_recursive(const char *prefix, bool ro);
928 int fflush_and_check(FILE *f);
930 int tempfn_xxxxxx(const char *p, char **ret);
931 int tempfn_random(const char *p, char **ret);
932 int tempfn_random_child(const char *p, char **ret);
934 bool is_localhost(const char *hostname);
936 int take_password_lock(const char *root);
938 int is_symlink(const char *path);
939 int is_dir(const char *path, bool follow);
941 typedef enum UnquoteFlags {
943 UNQUOTE_CUNESCAPE = 2,
946 int unquote_first_word(const char **p, char **ret, UnquoteFlags flags);
947 int unquote_many_words(const char **p, UnquoteFlags flags, ...) _sentinel_;
949 int free_and_strdup(char **p, const char *s);
951 int sethostname_idempotent(const char *s);
953 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
955 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
956 for ((e) = &buffer.ev; \
957 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
958 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
960 union inotify_event_buffer {
961 struct inotify_event ev;
962 uint8_t raw[INOTIFY_EVENT_MAX];
965 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
967 int ptsname_malloc(int fd, char **ret);
969 int openpt_in_namespace(pid_t pid, int flags);
971 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
973 int fd_setcrtime(int fd, usec_t usec);
974 int fd_getcrtime(int fd, usec_t *usec);
975 int path_getcrtime(const char *p, usec_t *usec);
976 int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
978 int chattr_fd(int fd, unsigned value, unsigned mask);
979 int chattr_path(const char *p, unsigned value, unsigned mask);
981 int read_attr_fd(int fd, unsigned *ret);
982 int read_attr_path(const char *p, unsigned *ret);
984 typedef struct LockFile {
990 int make_lock_file(const char *p, int operation, LockFile *ret);
991 int make_lock_file_for(const char *p, int operation, LockFile *ret);
992 void release_lock_file(LockFile *f);
994 #define _cleanup_release_lock_file_ _cleanup_(release_lock_file)
996 #define LOCK_FILE_INIT { .fd = -1, .path = NULL }
998 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
1000 ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
1002 void sigkill_wait(pid_t *pid);
1003 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
1005 int syslog_parse_priority(const char **p, int *priority, bool with_facility);
1007 void cmsg_close_all(struct msghdr *mh);
1009 int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
1011 char *shell_maybe_quote(const char *s);
1013 int parse_mode(const char *s, mode_t *ret);