1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
36 #include <sys/types.h>
39 #include <sys/resource.h>
44 #include <sys/socket.h>
47 # define PID_FMT "%" PRIu32
48 #elif SIZEOF_PID_T == 2
49 # define PID_FMT "%" PRIu16
51 # error Unknown pid_t size
55 # define UID_FMT "%" PRIu32
56 #elif SIZEOF_UID_T == 2
57 # define UID_FMT "%" PRIu16
59 # error Unknown uid_t size
63 # define GID_FMT "%" PRIu32
64 #elif SIZEOF_GID_T == 2
65 # define GID_FMT "%" PRIu16
67 # error Unknown gid_t size
70 #if SIZEOF_TIME_T == 8
71 # define PRI_TIME PRIu64
72 #elif SIZEOF_GID_T == 4
73 # define PRI_TIME PRIu32
75 # error Unknown time_t size
78 #if SIZEOF_RLIM_T == 8
79 # define RLIM_FMT "%" PRIu64
80 #elif SIZEOF_RLIM_T == 4
81 # define RLIM_FMT "%" PRIu32
83 # error Unknown rlim_t size
87 #include "time-util.h"
89 /* What is interpreted as whitespace? */
90 #define WHITESPACE " \t\n\r"
91 #define NEWLINE "\n\r"
94 #define GLOB_CHARS "*?["
96 #define FORMAT_BYTES_MAX 8
98 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
99 #define ANSI_RED_ON "\x1B[31m"
100 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
101 #define ANSI_GREEN_ON "\x1B[32m"
102 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
103 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
104 #define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
105 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
106 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
108 size_t page_size(void);
109 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
111 #define streq(a,b) (strcmp((a),(b)) == 0)
112 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
113 #define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
114 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
116 bool streq_ptr(const char *a, const char *b) _pure_;
118 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
120 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
122 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
124 #define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
126 #define malloc0(n) (calloc((n), 1))
128 static inline const char* yes_no(bool b) {
129 return b ? "yes" : "no";
132 static inline const char* true_false(bool b) {
133 return b ? "true" : "false";
136 static inline const char* strempty(const char *s) {
140 static inline const char* strnull(const char *s) {
141 return s ? s : "(null)";
144 static inline const char *strna(const char *s) {
145 return s ? s : "n/a";
148 static inline bool isempty(const char *p) {
152 static inline const char *startswith(const char *s, const char *prefix) {
153 if (strncmp(s, prefix, strlen(prefix)) == 0)
154 return s + strlen(prefix);
158 static inline const char *startswith_no_case(const char *s, const char *prefix) {
159 if (strncasecmp(s, prefix, strlen(prefix)) == 0)
160 return s + strlen(prefix);
164 char *endswith(const char *s, const char *postfix) _pure_;
166 bool first_word(const char *s, const char *word) _pure_;
168 int close_nointr(int fd);
169 int safe_close(int fd);
170 void safe_close_pair(int p[]);
172 void close_many(const int fds[], unsigned n_fd);
174 int parse_size(const char *t, off_t base, off_t *size);
176 int parse_boolean(const char *v) _pure_;
177 int parse_pid(const char *s, pid_t* ret_pid);
178 int parse_uid(const char *s, uid_t* ret_uid);
179 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
181 int safe_atou(const char *s, unsigned *ret_u);
182 int safe_atoi(const char *s, int *ret_i);
184 int safe_atollu(const char *s, unsigned long long *ret_u);
185 int safe_atolli(const char *s, long long int *ret_i);
187 int safe_atod(const char *s, double *ret_d);
190 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
191 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
192 return safe_atou(s, (unsigned*) ret_u);
194 static inline int safe_atoli(const char *s, long int *ret_u) {
195 assert_cc(sizeof(long int) == sizeof(int));
196 return safe_atoi(s, (int*) ret_u);
199 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
200 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
201 return safe_atollu(s, (unsigned long long*) ret_u);
203 static inline int safe_atoli(const char *s, long int *ret_u) {
204 assert_cc(sizeof(long int) == sizeof(long long int));
205 return safe_atolli(s, (long long int*) ret_u);
209 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
210 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
211 return safe_atou(s, (unsigned*) ret_u);
214 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
215 assert_cc(sizeof(int32_t) == sizeof(int));
216 return safe_atoi(s, (int*) ret_i);
219 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
220 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
221 return safe_atollu(s, (unsigned long long*) ret_u);
224 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
225 assert_cc(sizeof(int64_t) == sizeof(long long int));
226 return safe_atolli(s, (long long int*) ret_i);
229 char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state);
231 #define FOREACH_WORD(word, length, s, state) \
232 _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
234 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
235 _FOREACH_WORD(word, length, s, separator, false, state)
237 #define FOREACH_WORD_QUOTED(word, length, s, state) \
238 _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
240 #define FOREACH_WORD_SEPARATOR_QUOTED(word, length, s, separator, state) \
241 _FOREACH_WORD(word, length, s, separator, true, state)
243 #define _FOREACH_WORD(word, length, s, separator, quoted, state) \
244 for ((state) = NULL, (word) = split((s), &(length), (separator), (quoted), &(state)); (word); (word) = split((s), &(length), (separator), (quoted), &(state)))
246 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
247 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
249 char *strappend(const char *s, const char *suffix);
250 char *strnappend(const char *s, const char *suffix, size_t length);
252 char *replace_env(const char *format, char **env);
253 char **replace_env_argv(char **argv, char **env);
255 int readlinkat_malloc(int fd, const char *p, char **ret);
256 int readlink_malloc(const char *p, char **r);
257 int readlink_and_make_absolute(const char *p, char **r);
258 int readlink_and_canonicalize(const char *p, char **r);
260 int reset_all_signal_handlers(void);
262 char *strstrip(char *s);
263 char *delete_chars(char *s, const char *bad);
264 char *truncate_nl(char *s);
266 char *file_in_same_dir(const char *path, const char *filename);
268 int rmdir_parents(const char *path, const char *stop);
270 int get_process_state(pid_t pid);
271 int get_process_comm(pid_t pid, char **name);
272 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
273 int get_process_exe(pid_t pid, char **name);
274 int get_process_uid(pid_t pid, uid_t *uid);
275 int get_process_gid(pid_t pid, gid_t *gid);
276 int get_process_capeff(pid_t pid, char **capeff);
278 char hexchar(int x) _const_;
279 int unhexchar(char c) _const_;
280 char octchar(int x) _const_;
281 int unoctchar(char c) _const_;
282 char decchar(int x) _const_;
283 int undecchar(char c) _const_;
285 char *cescape(const char *s);
286 char *cunescape(const char *s);
287 char *cunescape_length(const char *s, size_t length);
288 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
290 char *xescape(const char *s, const char *bad);
292 char *ascii_strlower(char *path);
294 bool dirent_is_file(const struct dirent *de) _pure_;
295 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
297 bool ignore_file(const char *filename) _pure_;
299 bool chars_intersect(const char *a, const char *b) _pure_;
301 int make_stdio(int fd);
302 int make_null_stdio(void);
303 int make_console_stdio(void);
305 int dev_urandom(void *p, size_t n);
306 void random_bytes(void *p, size_t n);
308 static inline uint64_t random_u64(void) {
310 random_bytes(&u, sizeof(u));
314 static inline uint32_t random_u32(void) {
316 random_bytes(&u, sizeof(u));
320 /* For basic lookup tables with strictly enumerated entries */
321 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
322 scope const char *name##_to_string(type i) { \
323 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
325 return name##_table[i]; \
327 scope type name##_from_string(const char *s) { \
331 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
332 if (name##_table[i] && \
333 streq(name##_table[i], s)) \
337 struct __useless_struct_to_allow_trailing_semicolon__
339 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
340 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
342 /* For string conversions where numbers are also acceptable */
343 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
344 int name##_to_string_alloc(type i, char **str) { \
347 if (i < 0 || i > max) \
349 if (i < (type) ELEMENTSOF(name##_table)) { \
350 s = strdup(name##_table[i]); \
354 r = asprintf(&s, "%u", i); \
361 type name##_from_string(const char *s) { \
365 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
366 if (name##_table[i] && \
367 streq(name##_table[i], s)) \
369 if (safe_atou(s, &u) >= 0 && u <= max) \
373 struct __useless_struct_to_allow_trailing_semicolon__
375 int fd_nonblock(int fd, bool nonblock);
376 int fd_cloexec(int fd, bool cloexec);
378 int close_all_fds(const int except[], unsigned n_except);
380 bool fstype_is_network(const char *fstype);
384 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
385 int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
386 int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
388 int reset_terminal_fd(int fd, bool switch_to_text);
389 int reset_terminal(const char *name);
391 int open_terminal(const char *name, int mode);
392 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
393 int release_terminal(void);
395 int flush_fd(int fd);
397 int ignore_signals(int sig, ...);
398 int default_signals(int sig, ...);
399 int sigaction_many(const struct sigaction *sa, ...);
401 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
403 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
404 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
406 bool is_device_path(const char *path);
408 int dir_is_empty(const char *path);
409 char* dirname_malloc(const char *path);
411 void rename_process(const char name[8]);
413 void sigset_add_many(sigset_t *ss, ...);
414 int sigprocmask_many(int how, ...);
416 bool hostname_is_set(void);
418 char* gethostname_malloc(void);
419 char* getlogname_malloc(void);
420 char* getusername_malloc(void);
422 int getttyname_malloc(int fd, char **r);
423 int getttyname_harder(int fd, char **r);
425 int get_ctty_devnr(pid_t pid, dev_t *d);
426 int get_ctty(pid_t, dev_t *_devnr, char **r);
428 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
429 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
431 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
432 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
433 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
434 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
436 int pipe_eof(int fd);
438 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
440 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
441 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
443 int fd_columns(int fd);
444 unsigned columns(void);
445 int fd_lines(int fd);
446 unsigned lines(void);
447 void columns_lines_cache_reset(int _unused_ signum);
451 static inline const char *ansi_highlight(void) {
452 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
455 static inline const char *ansi_highlight_red(void) {
456 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
459 static inline const char *ansi_highlight_green(void) {
460 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
463 static inline const char *ansi_highlight_yellow(void) {
464 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
467 static inline const char *ansi_highlight_blue(void) {
468 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
471 static inline const char *ansi_highlight_off(void) {
472 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
475 int files_same(const char *filea, const char *fileb);
477 int running_in_chroot(void);
479 char *ellipsize(const char *s, size_t length, unsigned percent);
481 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
483 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
484 int touch(const char *path);
486 char *unquote(const char *s, const char *quotes);
487 char *normalize_env_assignment(const char *s);
489 int wait_for_terminate(pid_t pid, siginfo_t *status);
490 int wait_for_terminate_and_warn(const char *name, pid_t pid);
492 noreturn void freeze(void);
494 bool null_or_empty(struct stat *st) _pure_;
495 int null_or_empty_path(const char *fn);
497 DIR *xopendirat(int dirfd, const char *name, int flags);
499 char *fstab_node_to_udev_node(const char *p);
501 char *resolve_dev_console(char **active);
502 bool tty_is_vc(const char *tty);
503 bool tty_is_vc_resolve(const char *tty);
504 bool tty_is_console(const char *tty) _pure_;
505 int vtnr_from_tty(const char *tty);
506 const char *default_term_for_tty(const char *tty);
508 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
510 int kill_and_sigcont(pid_t pid, int sig);
512 bool nulstr_contains(const char*nulstr, const char *needle);
514 bool plymouth_running(void);
516 bool hostname_is_valid(const char *s) _pure_;
517 char* hostname_cleanup(char *s, bool lowercase);
519 bool machine_name_is_valid(const char *s) _pure_;
521 char* strshorten(char *s, size_t l);
523 int terminal_vhangup_fd(int fd);
524 int terminal_vhangup(const char *name);
526 int vt_disallocate(const char *name);
528 int symlink_atomic(const char *from, const char *to);
529 int mknod_atomic(const char *path, mode_t mode, dev_t dev);
530 int mkfifo_atomic(const char *path, mode_t mode);
532 int fchmod_umask(int fd, mode_t mode);
534 bool display_is_local(const char *display) _pure_;
535 int socket_from_display(const char *display, char **path);
537 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
538 int get_group_creds(const char **groupname, gid_t *gid);
540 int in_gid(gid_t gid);
541 int in_group(const char *name);
543 char* uid_to_name(uid_t uid);
544 char* gid_to_name(gid_t gid);
546 int glob_exists(const char *path);
547 int glob_extend(char ***strv, const char *path);
549 int dirent_ensure_type(DIR *d, struct dirent *de);
551 int get_files_in_directory(const char *path, char ***list);
553 char *strjoin(const char *x, ...) _sentinel_;
555 bool is_main_thread(void);
557 static inline bool _pure_ in_charset(const char *s, const char* charset) {
560 return s[strspn(s, charset)] == '\0';
563 int block_get_whole_disk(dev_t d, dev_t *ret);
565 int file_is_priv_sticky(const char *p);
567 int strdup_or_null(const char *a, char **b);
569 #define NULSTR_FOREACH(i, l) \
570 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
572 #define NULSTR_FOREACH_PAIR(i, j, l) \
573 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
575 int ioprio_class_to_string_alloc(int i, char **s);
576 int ioprio_class_from_string(const char *s);
578 const char *sigchld_code_to_string(int i) _const_;
579 int sigchld_code_from_string(const char *s) _pure_;
581 int log_facility_unshifted_to_string_alloc(int i, char **s);
582 int log_facility_unshifted_from_string(const char *s);
584 int log_level_to_string_alloc(int i, char **s);
585 int log_level_from_string(const char *s);
587 int sched_policy_to_string_alloc(int i, char **s);
588 int sched_policy_from_string(const char *s);
590 const char *rlimit_to_string(int i) _const_;
591 int rlimit_from_string(const char *s) _pure_;
593 int ip_tos_to_string_alloc(int i, char **s);
594 int ip_tos_from_string(const char *s);
596 const char *signal_to_string(int i) _const_;
597 int signal_from_string(const char *s) _pure_;
599 int signal_from_string_try_harder(const char *s);
601 extern int saved_argc;
602 extern char **saved_argv;
604 bool kexec_loaded(void);
606 int prot_from_flags(int flags) _const_;
608 char *format_bytes(char *buf, size_t l, off_t t);
610 int fd_wait_for_event(int fd, int event, usec_t timeout);
612 void* memdup(const void *p, size_t l) _alloc_(2);
614 int is_kernel_thread(pid_t pid);
616 int fd_inc_sndbuf(int fd, size_t n);
617 int fd_inc_rcvbuf(int fd, size_t n);
619 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
621 int setrlimit_closest(int resource, const struct rlimit *rlim);
623 int getenv_for_pid(pid_t pid, const char *field, char **_value);
625 bool is_valid_documentation_url(const char *url) _pure_;
627 bool in_initrd(void);
629 void warn_melody(void);
631 int get_home_dir(char **ret);
632 int get_shell(char **_ret);
634 static inline void freep(void *p) {
638 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
639 static inline void func##p(type *p) { \
643 struct __useless_struct_to_allow_trailing_semicolon__
645 static inline void closep(int *fd) {
649 static inline void umaskp(mode_t *u) {
653 static inline void close_pairp(int (*p)[2]) {
657 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
658 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
659 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
660 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
662 #define _cleanup_free_ _cleanup_(freep)
663 #define _cleanup_close_ _cleanup_(closep)
664 #define _cleanup_umask_ _cleanup_(umaskp)
665 #define _cleanup_globfree_ _cleanup_(globfree)
666 #define _cleanup_fclose_ _cleanup_(fclosep)
667 #define _cleanup_pclose_ _cleanup_(pclosep)
668 #define _cleanup_closedir_ _cleanup_(closedirp)
669 #define _cleanup_endmntent_ _cleanup_(endmntentp)
670 #define _cleanup_close_pair_ _cleanup_(close_pairp)
672 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
673 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
676 return malloc(a * b);
679 _alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
680 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
683 return realloc(p, a * b);
686 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
687 if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
690 return memdup(p, a * b);
693 bool filename_is_safe(const char *p) _pure_;
694 bool path_is_safe(const char *p) _pure_;
695 bool string_is_safe(const char *p) _pure_;
696 bool string_has_cc(const char *p, const char *ok) _pure_;
699 * Check if a string contains any glob patterns.
701 _pure_ static inline bool string_is_glob(const char *p) {
702 return !!strpbrk(p, GLOB_CHARS);
705 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
706 int (*compar) (const void *, const void *, void *),
709 bool is_locale_utf8(void);
711 typedef enum DrawSpecialChar {
716 DRAW_TRIANGULAR_BULLET,
720 _DRAW_SPECIAL_CHAR_MAX
723 const char *draw_special_char(DrawSpecialChar ch);
725 char *strreplace(const char *text, const char *old_string, const char *new_string);
727 char *strip_tab_ansi(char **p, size_t *l);
729 int on_ac_power(void);
731 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
732 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
734 #define FOREACH_LINE(line, f, on_error) \
736 if (!fgets(line, sizeof(line), f)) { \
743 #define FOREACH_DIRENT(de, d, on_error) \
744 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
750 } else if (ignore_file((de)->d_name)) \
754 static inline void *mempset(void *s, int c, size_t n) {
756 return (uint8_t*)s + n;
759 char *hexmem(const void *p, size_t l);
760 void *unhexmem(const char *p, size_t l);
762 char *strextend(char **x, ...) _sentinel_;
763 char *strrep(const char *s, unsigned n);
765 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
766 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
767 #define GREEDY_REALLOC(array, allocated, need) \
768 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
770 #define GREEDY_REALLOC0(array, allocated, need) \
771 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
773 static inline void _reset_errno_(int *saved_errno) {
774 errno = *saved_errno;
777 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
779 struct _umask_struct_ {
784 static inline void _reset_umask_(struct _umask_struct_ *s) {
788 #define RUN_WITH_UMASK(mask) \
789 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
790 !_saved_umask_.quit ; \
791 _saved_umask_.quit = true)
793 static inline unsigned u64log2(uint64_t n) {
794 #if __SIZEOF_LONG_LONG__ == 8
795 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
801 static inline unsigned u32ctz(uint32_t n) {
802 #if __SIZEOF_INT__ == 4
803 return __builtin_ctz(n);
809 static inline int log2i(int x) {
812 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
815 static inline bool logind_running(void) {
816 return access("/run/systemd/seats/", F_OK) >= 0;
819 #define DECIMAL_STR_WIDTH(x) \
821 typeof(x) _x_ = (x); \
828 int unlink_noerrno(const char *path);
834 _new_ = alloca(_len_); \
835 (void *) memset(_new_, 0, _len_); \
838 #define strappenda(a, b) \
840 const char *_a_ = (a), *_b_ = (b); \
845 _c_ = alloca(_x_ + _y_ + 1); \
846 strcpy(stpcpy(_c_, _a_), _b_); \
850 #define strappenda3(a, b, c) \
852 const char *_a_ = (a), *_b_ = (b), *_c_ = (c); \
854 size_t _x_, _y_, _z_; \
858 _d_ = alloca(_x_ + _y_ + _z_ + 1); \
859 strcpy(stpcpy(stpcpy(_d_, _a_), _b_), _c_); \
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);