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 size_t page_size(void) _pure_;
67 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
69 #define streq(a,b) (strcmp((a),(b)) == 0)
70 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
71 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
72 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
74 bool streq_ptr(const char *a, const char *b) _pure_;
76 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
78 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
80 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
82 #define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
84 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
86 #define malloc0(n) (calloc((n), 1))
88 static inline const char* yes_no(bool b) {
89 return b ? "yes" : "no";
92 static inline const char* true_false(bool b) {
93 return b ? "true" : "false";
96 static inline const char* one_zero(bool b) {
100 static inline const char* strempty(const char *s) {
104 static inline const char* strnull(const char *s) {
105 return s ? s : "(null)";
108 static inline const char *strna(const char *s) {
109 return s ? s : "n/a";
112 static inline bool isempty(const char *p) {
116 static inline char *startswith(const char *s, const char *prefix) {
120 if (strncmp(s, prefix, l) == 0)
121 return (char*) s + l;
126 static inline char *startswith_no_case(const char *s, const char *prefix) {
130 if (strncasecmp(s, prefix, l) == 0)
131 return (char*) s + l;
136 char *endswith(const char *s, const char *postfix) _pure_;
137 char *endswith_no_case(const char *s, const char *postfix) _pure_;
139 char *first_word(const char *s, const char *word) _pure_;
141 int close_nointr(int fd);
142 int safe_close(int fd);
143 void safe_close_pair(int p[]);
145 void close_many(const int fds[], unsigned n_fd);
147 int parse_size(const char *t, off_t base, off_t *size);
149 int parse_boolean(const char *v) _pure_;
150 int parse_pid(const char *s, pid_t* ret_pid);
151 int parse_uid(const char *s, uid_t* ret_uid);
152 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
154 int safe_atou(const char *s, unsigned *ret_u);
155 int safe_atoi(const char *s, int *ret_i);
157 int safe_atollu(const char *s, unsigned long long *ret_u);
158 int safe_atolli(const char *s, long long int *ret_i);
160 int safe_atod(const char *s, double *ret_d);
162 int safe_atou8(const char *s, uint8_t *ret);
164 #if LONG_MAX == INT_MAX
165 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
166 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
167 return safe_atou(s, (unsigned*) ret_u);
169 static inline int safe_atoli(const char *s, long int *ret_u) {
170 assert_cc(sizeof(long int) == sizeof(int));
171 return safe_atoi(s, (int*) ret_u);
174 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
175 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
176 return safe_atollu(s, (unsigned long long*) ret_u);
178 static inline int safe_atoli(const char *s, long int *ret_u) {
179 assert_cc(sizeof(long int) == sizeof(long long int));
180 return safe_atolli(s, (long long int*) ret_u);
184 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
185 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
186 return safe_atou(s, (unsigned*) ret_u);
189 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
190 assert_cc(sizeof(int32_t) == sizeof(int));
191 return safe_atoi(s, (int*) ret_i);
194 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
195 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
196 return safe_atollu(s, (unsigned long long*) ret_u);
199 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
200 assert_cc(sizeof(int64_t) == sizeof(long long int));
201 return safe_atolli(s, (long long int*) ret_i);
204 int safe_atou16(const char *s, uint16_t *ret);
205 int safe_atoi16(const char *s, int16_t *ret);
207 const char* split(const char **state, size_t *l, const char *separator, bool quoted);
209 #define FOREACH_WORD(word, length, s, state) \
210 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
212 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
213 _FOREACH_WORD(word, length, s, separator, false, state)
215 #define FOREACH_WORD_QUOTED(word, length, s, state) \
216 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
218 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
219 for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
221 char *strappend(const char *s, const char *suffix);
222 char *strnappend(const char *s, const char *suffix, size_t length);
224 char *replace_env(const char *format, char **env);
225 char **replace_env_argv(char **argv, char **env);
227 int readlinkat_malloc(int fd, const char *p, char **ret);
228 int readlink_malloc(const char *p, char **r);
229 int readlink_value(const char *p, char **ret);
230 int readlink_and_make_absolute(const char *p, char **r);
231 int readlink_and_canonicalize(const char *p, char **r);
233 int reset_all_signal_handlers(void);
234 int reset_signal_mask(void);
236 char *strstrip(char *s);
237 char *delete_chars(char *s, const char *bad);
238 char *truncate_nl(char *s);
240 char *file_in_same_dir(const char *path, const char *filename);
242 int rmdir_parents(const char *path, const char *stop);
244 char hexchar(int x) _const_;
245 int unhexchar(char c) _const_;
246 char octchar(int x) _const_;
247 int unoctchar(char c) _const_;
248 char decchar(int x) _const_;
249 int undecchar(char c) _const_;
251 char *cescape(const char *s);
252 size_t cescape_char(char c, char *buf);
254 typedef enum UnescapeFlags {
258 int cunescape(const char *s, UnescapeFlags flags, char **ret);
259 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
260 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
262 char *xescape(const char *s, const char *bad);
264 char *ascii_strlower(char *path);
266 bool dirent_is_file(const struct dirent *de) _pure_;
267 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
269 bool hidden_file(const char *filename) _pure_;
271 bool chars_intersect(const char *a, const char *b) _pure_;
273 /* For basic lookup tables with strictly enumerated entries */
274 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
275 scope const char *name##_to_string(type i) { \
276 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
278 return name##_table[i]; \
281 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
283 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
284 scope inline type name##_from_string(const char *s) { \
285 return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
288 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
289 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
290 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
291 struct __useless_struct_to_allow_trailing_semicolon__
293 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
294 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
295 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
296 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
298 /* For string conversions where numbers are also acceptable */
299 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
300 int name##_to_string_alloc(type i, char **str) { \
303 if (i < 0 || i > max) \
305 if (i < (type) ELEMENTSOF(name##_table)) { \
306 s = strdup(name##_table[i]); \
310 r = asprintf(&s, "%i", i); \
317 type name##_from_string(const char *s) { \
321 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
322 if (name##_table[i] && \
323 streq(name##_table[i], s)) \
325 if (safe_atou(s, &u) >= 0 && u <= max) \
329 struct __useless_struct_to_allow_trailing_semicolon__
331 int fd_nonblock(int fd, bool nonblock);
332 int fd_cloexec(int fd, bool cloexec);
334 int close_all_fds(const int except[], unsigned n_except);
336 bool fstype_is_network(const char *fstype);
338 int flush_fd(int fd);
340 int ignore_signals(int sig, ...);
341 int default_signals(int sig, ...);
342 int sigaction_many(const struct sigaction *sa, ...);
344 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
346 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
347 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
348 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
350 bool is_device_path(const char *path);
352 int dir_is_empty(const char *path);
353 char* dirname_malloc(const char *path);
355 void sigset_add_many(sigset_t *ss, ...);
356 int sigprocmask_many(int how, ...);
358 bool hostname_is_set(void);
360 char* lookup_uid(uid_t uid);
361 char* gethostname_malloc(void);
362 char* getlogname_malloc(void);
363 char* getusername_malloc(void);
365 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
366 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
368 bool is_temporary_fs(const struct statfs *s) _pure_;
369 int fd_is_temporary_fs(int fd);
371 int pipe_eof(int fd);
373 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
375 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
377 int files_same(const char *filea, const char *fileb);
379 int running_in_chroot(void);
381 char *ellipsize(const char *s, size_t length, unsigned percent);
383 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
385 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
386 int touch(const char *path);
388 noreturn void freeze(void);
390 bool null_or_empty(struct stat *st) _pure_;
391 int null_or_empty_path(const char *fn);
392 int null_or_empty_fd(int fd);
394 DIR *xopendirat(int dirfd, const char *name, int flags);
396 char *fstab_node_to_udev_node(const char *p);
398 void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
400 bool nulstr_contains(const char*nulstr, const char *needle);
402 bool plymouth_running(void);
404 bool hostname_is_valid(const char *s) _pure_;
405 char* hostname_cleanup(char *s, bool lowercase);
407 bool machine_name_is_valid(const char *s) _pure_;
409 char* strshorten(char *s, size_t l);
412 int symlink_atomic(const char *from, const char *to);
413 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
414 int mkfifo_atomic(const char *path, mode_t mode);
416 int fchmod_umask(int fd, mode_t mode);
418 bool display_is_local(const char *display) _pure_;
419 int socket_from_display(const char *display, char **path);
421 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
422 int get_group_creds(const char **groupname, gid_t *gid);
424 int in_gid(gid_t gid);
425 int in_group(const char *name);
427 char* uid_to_name(uid_t uid);
428 char* gid_to_name(gid_t gid);
430 int glob_exists(const char *path);
431 int glob_extend(char ***strv, const char *path);
433 int dirent_ensure_type(DIR *d, struct dirent *de);
435 int get_files_in_directory(const char *path, char ***list);
437 char *strjoin(const char *x, ...) _sentinel_;
439 bool is_main_thread(void);
441 static inline bool _pure_ in_charset(const char *s, const char* charset) {
444 return s[strspn(s, charset)] == '\0';
447 int block_get_whole_disk(dev_t d, dev_t *ret);
449 #define NULSTR_FOREACH(i, l) \
450 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
452 #define NULSTR_FOREACH_PAIR(i, j, l) \
453 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
455 int ioprio_class_to_string_alloc(int i, char **s);
456 int ioprio_class_from_string(const char *s);
458 const char *sigchld_code_to_string(int i) _const_;
459 int sigchld_code_from_string(const char *s) _pure_;
461 int log_facility_unshifted_to_string_alloc(int i, char **s);
462 int log_facility_unshifted_from_string(const char *s);
464 int log_level_to_string_alloc(int i, char **s);
465 int log_level_from_string(const char *s);
467 int sched_policy_to_string_alloc(int i, char **s);
468 int sched_policy_from_string(const char *s);
470 const char *rlimit_to_string(int i) _const_;
471 int rlimit_from_string(const char *s) _pure_;
473 int ip_tos_to_string_alloc(int i, char **s);
474 int ip_tos_from_string(const char *s);
476 const char *signal_to_string(int i) _const_;
477 int signal_from_string(const char *s) _pure_;
479 int signal_from_string_try_harder(const char *s);
481 extern int saved_argc;
482 extern char **saved_argv;
484 bool kexec_loaded(void);
486 int prot_from_flags(int flags) _const_;
488 char *format_bytes(char *buf, size_t l, off_t t);
490 int fd_wait_for_event(int fd, int event, usec_t timeout);
492 void* memdup(const void *p, size_t l) _alloc_(2);
494 int fd_inc_sndbuf(int fd, size_t n);
495 int fd_inc_rcvbuf(int fd, size_t n);
497 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
499 int setrlimit_closest(int resource, const struct rlimit *rlim);
501 bool http_url_is_valid(const char *url) _pure_;
502 bool documentation_url_is_valid(const char *url) _pure_;
504 bool http_etag_is_valid(const char *etag);
506 bool in_initrd(void);
508 int get_home_dir(char **ret);
509 int get_shell(char **_ret);
511 static inline void freep(void *p) {
515 static inline void closep(int *fd) {
519 static inline void umaskp(mode_t *u) {
523 static inline void close_pairp(int (*p)[2]) {
527 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
528 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
529 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
530 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
532 #define _cleanup_free_ _cleanup_(freep)
533 #define _cleanup_close_ _cleanup_(closep)
534 #define _cleanup_umask_ _cleanup_(umaskp)
535 #define _cleanup_globfree_ _cleanup_(globfree)
536 #define _cleanup_fclose_ _cleanup_(fclosep)
537 #define _cleanup_pclose_ _cleanup_(pclosep)
538 #define _cleanup_closedir_ _cleanup_(closedirp)
539 #define _cleanup_endmntent_ _cleanup_(endmntentp)
540 #define _cleanup_close_pair_ _cleanup_(close_pairp)
542 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
543 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
546 return malloc(a * b);
549 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
550 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
553 return realloc(p, a * b);
556 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
557 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
560 return memdup(p, a * b);
563 bool filename_is_valid(const char *p) _pure_;
564 bool path_is_safe(const char *p) _pure_;
565 bool string_is_safe(const char *p) _pure_;
566 bool string_has_cc(const char *p, const char *ok) _pure_;
569 * Check if a string contains any glob patterns.
571 _pure_ static inline bool string_is_glob(const char *p) {
572 return !!strpbrk(p, GLOB_CHARS);
575 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
576 int (*compar) (const void *, const void *, void *),
579 #define _(String) gettext (String)
580 void init_gettext(void);
581 bool is_locale_utf8(void);
583 typedef enum DrawSpecialChar {
588 DRAW_TRIANGULAR_BULLET,
592 _DRAW_SPECIAL_CHAR_MAX
595 const char *draw_special_char(DrawSpecialChar ch);
597 char *strreplace(const char *text, const char *old_string, const char *new_string);
599 char *strip_tab_ansi(char **p, size_t *l);
601 int on_ac_power(void);
603 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
604 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
606 #define FOREACH_LINE(line, f, on_error) \
608 if (!fgets(line, sizeof(line), f)) { \
615 #define FOREACH_DIRENT(de, d, on_error) \
616 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
622 } else if (hidden_file((de)->d_name)) \
626 #define FOREACH_DIRENT_ALL(de, d, on_error) \
627 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
635 static inline void *mempset(void *s, int c, size_t n) {
637 return (uint8_t*)s + n;
640 char *hexmem(const void *p, size_t l);
641 void *unhexmem(const char *p, size_t l);
643 char *strextend(char **x, ...) _sentinel_;
644 char *strrep(const char *s, unsigned n);
646 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
647 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
648 #define GREEDY_REALLOC(array, allocated, need) \
649 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
651 #define GREEDY_REALLOC0(array, allocated, need) \
652 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
654 static inline void _reset_errno_(int *saved_errno) {
655 errno = *saved_errno;
658 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
660 static inline int negative_errno(void) {
661 /* This helper should be used to shut up gcc if you know 'errno' is
662 * negative. Instead of "return -errno;", use "return negative_errno();"
663 * It will suppress bogus gcc warnings in case it assumes 'errno' might
664 * be 0 and thus the caller's error-handling might not be triggered. */
665 assert_return(errno > 0, -EINVAL);
669 struct _umask_struct_ {
674 static inline void _reset_umask_(struct _umask_struct_ *s) {
678 #define RUN_WITH_UMASK(mask) \
679 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
680 !_saved_umask_.quit ; \
681 _saved_umask_.quit = true)
683 static inline unsigned u64log2(uint64_t n) {
684 #if __SIZEOF_LONG_LONG__ == 8
685 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
691 static inline unsigned u32ctz(uint32_t n) {
692 #if __SIZEOF_INT__ == 4
693 return __builtin_ctz(n);
699 static inline unsigned log2i(int x) {
702 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
705 static inline unsigned log2u(unsigned x) {
708 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
711 static inline unsigned log2u_round_up(unsigned x) {
717 return log2u(x - 1) + 1;
720 static inline bool logind_running(void) {
721 return access("/run/systemd/seats/", F_OK) >= 0;
724 #define DECIMAL_STR_WIDTH(x) \
726 typeof(x) _x_ = (x); \
733 int unlink_noerrno(const char *path);
739 _new_ = alloca(_len_); \
740 (void *) memset(_new_, 0, _len_); \
743 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
744 #define alloca_align(size, align) \
747 size_t _mask_ = (align) - 1; \
748 _ptr_ = alloca((size) + _mask_); \
749 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
752 #define alloca0_align(size, align) \
755 size_t _size_ = (size); \
756 _new_ = alloca_align(_size_, (align)); \
757 (void*)memset(_new_, 0, _size_); \
760 #define strjoina(a, ...) \
762 const char *_appendees_[] = { a, __VA_ARGS__ }; \
766 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
767 _len_ += strlen(_appendees_[_i_]); \
768 _p_ = _d_ = alloca(_len_ + 1); \
769 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
770 _p_ = stpcpy(_p_, _appendees_[_i_]); \
775 bool id128_is_valid(const char *s) _pure_;
777 int split_pair(const char *s, const char *sep, char **l, char **r);
779 int shall_restore_state(void);
782 * Normal qsort requires base to be nonnull. Here were require
783 * that only if nmemb > 0.
785 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
786 int (*compar)(const void *, const void *)) {
789 qsort(base, nmemb, size, compar);
793 int proc_cmdline(char **ret);
794 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
795 int get_proc_cmdline_key(const char *parameter, char **value);
797 int container_get_leader(const char *machine, pid_t *pid);
799 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
800 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
802 int getpeercred(int fd, struct ucred *ucred);
803 int getpeersec(int fd, char **ret);
805 int writev_safe(int fd, const struct iovec *w, int j);
807 int mkostemp_safe(char *pattern, int flags);
808 int open_tmpfile(const char *path, int flags);
810 int fd_warn_permissions(const char *path, int fd);
812 unsigned long personality_from_string(const char *p);
813 const char *personality_to_string(unsigned long);
815 uint64_t physical_memory(void);
817 void hexdump(FILE *f, const void *p, size_t s);
819 union file_handle_union {
820 struct file_handle handle;
821 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
823 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
825 int update_reboot_param_file(const char *param);
827 int umount_recursive(const char *target, int flags);
829 int bind_remount_recursive(const char *prefix, bool ro);
831 int fflush_and_check(FILE *f);
833 int tempfn_xxxxxx(const char *p, char **ret);
834 int tempfn_random(const char *p, char **ret);
835 int tempfn_random_child(const char *p, char **ret);
837 bool is_localhost(const char *hostname);
839 int take_password_lock(const char *root);
841 int is_symlink(const char *path);
842 int is_dir(const char *path, bool follow);
844 typedef enum UnquoteFlags {
846 UNQUOTE_CUNESCAPE = 2,
849 int unquote_first_word(const char **p, char **ret, UnquoteFlags flags);
850 int unquote_many_words(const char **p, UnquoteFlags flags, ...) _sentinel_;
852 int free_and_strdup(char **p, const char *s);
854 int sethostname_idempotent(const char *s);
856 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
858 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
859 for ((e) = &buffer.ev; \
860 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
861 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
863 union inotify_event_buffer {
864 struct inotify_event ev;
865 uint8_t raw[INOTIFY_EVENT_MAX];
868 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
870 int ptsname_malloc(int fd, char **ret);
872 int openpt_in_namespace(pid_t pid, int flags);
874 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
876 int fd_setcrtime(int fd, usec_t usec);
877 int fd_getcrtime(int fd, usec_t *usec);
878 int path_getcrtime(const char *p, usec_t *usec);
879 int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
881 int chattr_fd(int fd, unsigned value, unsigned mask);
882 int chattr_path(const char *p, unsigned value, unsigned mask);
884 int read_attr_fd(int fd, unsigned *ret);
885 int read_attr_path(const char *p, unsigned *ret);
887 typedef struct LockFile {
893 int make_lock_file(const char *p, int operation, LockFile *ret);
894 int make_lock_file_for(const char *p, int operation, LockFile *ret);
895 void release_lock_file(LockFile *f);
897 #define _cleanup_release_lock_file_ _cleanup_(release_lock_file)
899 #define LOCK_FILE_INIT { .fd = -1, .path = NULL }
901 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
903 ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
905 void sigkill_wait(pid_t *pid);
906 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
908 int syslog_parse_priority(const char **p, int *priority, bool with_facility);
910 void cmsg_close_all(struct msghdr *mh);
912 int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
914 char *shell_maybe_quote(const char *s);
916 int parse_mode(const char *s, mode_t *ret);