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 int readlinkat_malloc(int fd, const char *p, char **ret);
225 int readlink_malloc(const char *p, char **r);
226 int readlink_value(const char *p, char **ret);
227 int readlink_and_make_absolute(const char *p, char **r);
228 int readlink_and_canonicalize(const char *p, char **r);
230 int reset_all_signal_handlers(void);
231 int reset_signal_mask(void);
233 char *strstrip(char *s);
234 char *delete_chars(char *s, const char *bad);
235 char *truncate_nl(char *s);
237 char *file_in_same_dir(const char *path, const char *filename);
239 int rmdir_parents(const char *path, const char *stop);
241 char hexchar(int x) _const_;
242 int unhexchar(char c) _const_;
243 char octchar(int x) _const_;
244 int unoctchar(char c) _const_;
245 char decchar(int x) _const_;
246 int undecchar(char c) _const_;
248 char *cescape(const char *s);
249 size_t cescape_char(char c, char *buf);
251 typedef enum UnescapeFlags {
255 int cunescape(const char *s, UnescapeFlags flags, char **ret);
256 int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
257 int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
259 char *xescape(const char *s, const char *bad);
261 char *ascii_strlower(char *path);
263 bool dirent_is_file(const struct dirent *de) _pure_;
264 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
266 bool hidden_file(const char *filename) _pure_;
268 bool chars_intersect(const char *a, const char *b) _pure_;
270 /* For basic lookup tables with strictly enumerated entries */
271 #define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
272 scope const char *name##_to_string(type i) { \
273 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
275 return name##_table[i]; \
278 ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
280 #define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
281 scope inline type name##_from_string(const char *s) { \
282 return (type)string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
285 #define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
286 _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
287 _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope) \
288 struct __useless_struct_to_allow_trailing_semicolon__
290 #define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
291 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
292 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
293 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
295 /* For string conversions where numbers are also acceptable */
296 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
297 int name##_to_string_alloc(type i, char **str) { \
300 if (i < 0 || i > max) \
302 if (i < (type) ELEMENTSOF(name##_table)) { \
303 s = strdup(name##_table[i]); \
307 r = asprintf(&s, "%i", i); \
314 type name##_from_string(const char *s) { \
318 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
319 if (name##_table[i] && \
320 streq(name##_table[i], s)) \
322 if (safe_atou(s, &u) >= 0 && u <= max) \
326 struct __useless_struct_to_allow_trailing_semicolon__
328 int fd_nonblock(int fd, bool nonblock);
329 int fd_cloexec(int fd, bool cloexec);
331 int close_all_fds(const int except[], unsigned n_except);
333 bool fstype_is_network(const char *fstype);
335 int flush_fd(int fd);
337 int ignore_signals(int sig, ...);
338 int default_signals(int sig, ...);
339 int sigaction_many(const struct sigaction *sa, ...);
341 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
343 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
344 int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
345 int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
347 bool is_device_path(const char *path);
349 int dir_is_empty(const char *path);
350 char* dirname_malloc(const char *path);
352 void sigset_add_many(sigset_t *ss, ...);
353 int sigprocmask_many(int how, ...);
355 bool hostname_is_set(void);
357 char* lookup_uid(uid_t uid);
358 char* gethostname_malloc(void);
359 char* getlogname_malloc(void);
360 char* getusername_malloc(void);
362 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
363 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
365 bool is_temporary_fs(const struct statfs *s) _pure_;
366 int fd_is_temporary_fs(int fd);
368 int pipe_eof(int fd);
370 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
372 #define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
374 int files_same(const char *filea, const char *fileb);
376 int running_in_chroot(void);
378 char *ellipsize(const char *s, size_t length, unsigned percent);
380 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
382 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
383 int touch(const char *path);
385 noreturn void freeze(void);
387 bool null_or_empty(struct stat *st) _pure_;
388 int null_or_empty_path(const char *fn);
389 int null_or_empty_fd(int fd);
391 DIR *xopendirat(int dirfd, const char *name, int flags);
393 char *fstab_node_to_udev_node(const char *p);
395 void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
397 bool nulstr_contains(const char*nulstr, const char *needle);
399 bool plymouth_running(void);
401 bool hostname_is_valid(const char *s) _pure_;
402 char* hostname_cleanup(char *s, bool lowercase);
404 bool machine_name_is_valid(const char *s) _pure_;
406 char* strshorten(char *s, size_t l);
409 int symlink_atomic(const char *from, const char *to);
410 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
411 int mkfifo_atomic(const char *path, mode_t mode);
413 int fchmod_umask(int fd, mode_t mode);
415 bool display_is_local(const char *display) _pure_;
416 int socket_from_display(const char *display, char **path);
418 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
419 int get_group_creds(const char **groupname, gid_t *gid);
421 int in_gid(gid_t gid);
422 int in_group(const char *name);
424 char* uid_to_name(uid_t uid);
425 char* gid_to_name(gid_t gid);
427 int glob_exists(const char *path);
428 int glob_extend(char ***strv, const char *path);
430 int dirent_ensure_type(DIR *d, struct dirent *de);
432 int get_files_in_directory(const char *path, char ***list);
434 char *strjoin(const char *x, ...) _sentinel_;
436 bool is_main_thread(void);
438 static inline bool _pure_ in_charset(const char *s, const char* charset) {
441 return s[strspn(s, charset)] == '\0';
444 int block_get_whole_disk(dev_t d, dev_t *ret);
446 #define NULSTR_FOREACH(i, l) \
447 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
449 #define NULSTR_FOREACH_PAIR(i, j, l) \
450 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
452 int ioprio_class_to_string_alloc(int i, char **s);
453 int ioprio_class_from_string(const char *s);
455 const char *sigchld_code_to_string(int i) _const_;
456 int sigchld_code_from_string(const char *s) _pure_;
458 int log_facility_unshifted_to_string_alloc(int i, char **s);
459 int log_facility_unshifted_from_string(const char *s);
461 int log_level_to_string_alloc(int i, char **s);
462 int log_level_from_string(const char *s);
464 int sched_policy_to_string_alloc(int i, char **s);
465 int sched_policy_from_string(const char *s);
467 const char *rlimit_to_string(int i) _const_;
468 int rlimit_from_string(const char *s) _pure_;
470 int ip_tos_to_string_alloc(int i, char **s);
471 int ip_tos_from_string(const char *s);
473 const char *signal_to_string(int i) _const_;
474 int signal_from_string(const char *s) _pure_;
476 int signal_from_string_try_harder(const char *s);
478 extern int saved_argc;
479 extern char **saved_argv;
481 bool kexec_loaded(void);
483 int prot_from_flags(int flags) _const_;
485 char *format_bytes(char *buf, size_t l, off_t t);
487 int fd_wait_for_event(int fd, int event, usec_t timeout);
489 void* memdup(const void *p, size_t l) _alloc_(2);
491 int fd_inc_sndbuf(int fd, size_t n);
492 int fd_inc_rcvbuf(int fd, size_t n);
494 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
496 int setrlimit_closest(int resource, const struct rlimit *rlim);
498 bool http_url_is_valid(const char *url) _pure_;
499 bool documentation_url_is_valid(const char *url) _pure_;
501 bool http_etag_is_valid(const char *etag);
503 bool in_initrd(void);
505 int get_home_dir(char **ret);
506 int get_shell(char **_ret);
508 static inline void freep(void *p) {
512 static inline void closep(int *fd) {
516 static inline void umaskp(mode_t *u) {
520 static inline void close_pairp(int (*p)[2]) {
524 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
525 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
526 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
527 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
529 #define _cleanup_free_ _cleanup_(freep)
530 #define _cleanup_close_ _cleanup_(closep)
531 #define _cleanup_umask_ _cleanup_(umaskp)
532 #define _cleanup_globfree_ _cleanup_(globfree)
533 #define _cleanup_fclose_ _cleanup_(fclosep)
534 #define _cleanup_pclose_ _cleanup_(pclosep)
535 #define _cleanup_closedir_ _cleanup_(closedirp)
536 #define _cleanup_endmntent_ _cleanup_(endmntentp)
537 #define _cleanup_close_pair_ _cleanup_(close_pairp)
539 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
540 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
543 return malloc(a * b);
546 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
547 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
550 return realloc(p, a * b);
553 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
554 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
557 return memdup(p, a * b);
560 bool filename_is_valid(const char *p) _pure_;
561 bool path_is_safe(const char *p) _pure_;
562 bool string_is_safe(const char *p) _pure_;
563 bool string_has_cc(const char *p, const char *ok) _pure_;
566 * Check if a string contains any glob patterns.
568 _pure_ static inline bool string_is_glob(const char *p) {
569 return !!strpbrk(p, GLOB_CHARS);
572 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
573 int (*compar) (const void *, const void *, void *),
576 #define _(String) gettext (String)
577 void init_gettext(void);
578 bool is_locale_utf8(void);
580 typedef enum DrawSpecialChar {
585 DRAW_TRIANGULAR_BULLET,
589 _DRAW_SPECIAL_CHAR_MAX
592 const char *draw_special_char(DrawSpecialChar ch);
594 char *strreplace(const char *text, const char *old_string, const char *new_string);
596 char *strip_tab_ansi(char **p, size_t *l);
598 int on_ac_power(void);
600 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
601 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
603 #define FOREACH_LINE(line, f, on_error) \
605 if (!fgets(line, sizeof(line), f)) { \
612 #define FOREACH_DIRENT(de, d, on_error) \
613 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
619 } else if (hidden_file((de)->d_name)) \
623 #define FOREACH_DIRENT_ALL(de, d, on_error) \
624 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
632 static inline void *mempset(void *s, int c, size_t n) {
634 return (uint8_t*)s + n;
637 char *hexmem(const void *p, size_t l);
638 void *unhexmem(const char *p, size_t l);
640 char *strextend(char **x, ...) _sentinel_;
641 char *strrep(const char *s, unsigned n);
643 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
644 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
645 #define GREEDY_REALLOC(array, allocated, need) \
646 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
648 #define GREEDY_REALLOC0(array, allocated, need) \
649 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
651 static inline void _reset_errno_(int *saved_errno) {
652 errno = *saved_errno;
655 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
657 static inline int negative_errno(void) {
658 /* This helper should be used to shut up gcc if you know 'errno' is
659 * negative. Instead of "return -errno;", use "return negative_errno();"
660 * It will suppress bogus gcc warnings in case it assumes 'errno' might
661 * be 0 and thus the caller's error-handling might not be triggered. */
662 assert_return(errno > 0, -EINVAL);
666 struct _umask_struct_ {
671 static inline void _reset_umask_(struct _umask_struct_ *s) {
675 #define RUN_WITH_UMASK(mask) \
676 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
677 !_saved_umask_.quit ; \
678 _saved_umask_.quit = true)
680 static inline unsigned u64log2(uint64_t n) {
681 #if __SIZEOF_LONG_LONG__ == 8
682 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
688 static inline unsigned u32ctz(uint32_t n) {
689 #if __SIZEOF_INT__ == 4
690 return __builtin_ctz(n);
696 static inline unsigned log2i(int x) {
699 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
702 static inline unsigned log2u(unsigned x) {
705 return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
708 static inline unsigned log2u_round_up(unsigned x) {
714 return log2u(x - 1) + 1;
717 static inline bool logind_running(void) {
718 return access("/run/systemd/seats/", F_OK) >= 0;
721 #define DECIMAL_STR_WIDTH(x) \
723 typeof(x) _x_ = (x); \
730 int unlink_noerrno(const char *path);
736 _new_ = alloca(_len_); \
737 (void *) memset(_new_, 0, _len_); \
740 /* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
741 #define alloca_align(size, align) \
744 size_t _mask_ = (align) - 1; \
745 _ptr_ = alloca((size) + _mask_); \
746 (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_); \
749 #define alloca0_align(size, align) \
752 size_t _size_ = (size); \
753 _new_ = alloca_align(_size_, (align)); \
754 (void*)memset(_new_, 0, _size_); \
757 #define strjoina(a, ...) \
759 const char *_appendees_[] = { a, __VA_ARGS__ }; \
763 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
764 _len_ += strlen(_appendees_[_i_]); \
765 _p_ = _d_ = alloca(_len_ + 1); \
766 for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
767 _p_ = stpcpy(_p_, _appendees_[_i_]); \
772 bool id128_is_valid(const char *s) _pure_;
774 int split_pair(const char *s, const char *sep, char **l, char **r);
776 int shall_restore_state(void);
779 * Normal qsort requires base to be nonnull. Here were require
780 * that only if nmemb > 0.
782 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
783 int (*compar)(const void *, const void *)) {
786 qsort(base, nmemb, size, compar);
790 int proc_cmdline(char **ret);
791 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
792 int get_proc_cmdline_key(const char *parameter, char **value);
794 int container_get_leader(const char *machine, pid_t *pid);
796 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
797 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
799 int getpeercred(int fd, struct ucred *ucred);
800 int getpeersec(int fd, char **ret);
802 int writev_safe(int fd, const struct iovec *w, int j);
804 int mkostemp_safe(char *pattern, int flags);
805 int open_tmpfile(const char *path, int flags);
807 int fd_warn_permissions(const char *path, int fd);
809 unsigned long personality_from_string(const char *p);
810 const char *personality_to_string(unsigned long);
812 uint64_t physical_memory(void);
814 void hexdump(FILE *f, const void *p, size_t s);
816 union file_handle_union {
817 struct file_handle handle;
818 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
820 #define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
822 int update_reboot_param_file(const char *param);
824 int umount_recursive(const char *target, int flags);
826 int bind_remount_recursive(const char *prefix, bool ro);
828 int fflush_and_check(FILE *f);
830 int tempfn_xxxxxx(const char *p, char **ret);
831 int tempfn_random(const char *p, char **ret);
832 int tempfn_random_child(const char *p, char **ret);
834 bool is_localhost(const char *hostname);
836 int take_password_lock(const char *root);
838 int is_symlink(const char *path);
839 int is_dir(const char *path, bool follow);
841 typedef enum UnquoteFlags {
843 UNQUOTE_CUNESCAPE = 2,
846 int unquote_first_word(const char **p, char **ret, UnquoteFlags flags);
847 int unquote_many_words(const char **p, UnquoteFlags flags, ...) _sentinel_;
849 int free_and_strdup(char **p, const char *s);
851 int sethostname_idempotent(const char *s);
853 #define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
855 #define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
856 for ((e) = &buffer.ev; \
857 (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
858 (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
860 union inotify_event_buffer {
861 struct inotify_event ev;
862 uint8_t raw[INOTIFY_EVENT_MAX];
865 #define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
867 int ptsname_malloc(int fd, char **ret);
869 int openpt_in_namespace(pid_t pid, int flags);
871 ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags);
873 int fd_setcrtime(int fd, usec_t usec);
874 int fd_getcrtime(int fd, usec_t *usec);
875 int path_getcrtime(const char *p, usec_t *usec);
876 int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
878 int chattr_fd(int fd, unsigned value, unsigned mask);
879 int chattr_path(const char *p, unsigned value, unsigned mask);
881 int read_attr_fd(int fd, unsigned *ret);
882 int read_attr_path(const char *p, unsigned *ret);
884 #define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })
886 ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
888 void sigkill_wait(pid_t *pid);
889 #define _cleanup_sigkill_wait_ _cleanup_(sigkill_wait)
891 int syslog_parse_priority(const char **p, int *priority, bool with_facility);
893 void cmsg_close_all(struct msghdr *mh);
895 int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
897 char *shell_maybe_quote(const char *s);
899 int parse_mode(const char *s, mode_t *ret);