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 readlink_malloc(const char *p, char **r);
256 int readlink_and_make_absolute(const char *p, char **r);
257 int readlink_and_canonicalize(const char *p, char **r);
259 int reset_all_signal_handlers(void);
261 char *strstrip(char *s);
262 char *delete_chars(char *s, const char *bad);
263 char *truncate_nl(char *s);
265 char *file_in_same_dir(const char *path, const char *filename);
267 int rmdir_parents(const char *path, const char *stop);
269 int get_process_state(pid_t pid);
270 int get_process_comm(pid_t pid, char **name);
271 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
272 int get_process_exe(pid_t pid, char **name);
273 int get_process_uid(pid_t pid, uid_t *uid);
274 int get_process_gid(pid_t pid, gid_t *gid);
275 int get_process_capeff(pid_t pid, char **capeff);
277 char hexchar(int x) _const_;
278 int unhexchar(char c) _const_;
279 char octchar(int x) _const_;
280 int unoctchar(char c) _const_;
281 char decchar(int x) _const_;
282 int undecchar(char c) _const_;
284 char *cescape(const char *s);
285 char *cunescape(const char *s);
286 char *cunescape_length(const char *s, size_t length);
287 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
289 char *xescape(const char *s, const char *bad);
291 char *ascii_strlower(char *path);
293 bool dirent_is_file(const struct dirent *de) _pure_;
294 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
296 bool ignore_file(const char *filename) _pure_;
298 bool chars_intersect(const char *a, const char *b) _pure_;
300 int make_stdio(int fd);
301 int make_null_stdio(void);
302 int make_console_stdio(void);
304 int dev_urandom(void *p, size_t n);
305 void random_bytes(void *p, size_t n);
307 static inline uint64_t random_u64(void) {
309 random_bytes(&u, sizeof(u));
313 static inline uint32_t random_u32(void) {
315 random_bytes(&u, sizeof(u));
319 /* For basic lookup tables with strictly enumerated entries */
320 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
321 scope const char *name##_to_string(type i) { \
322 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
324 return name##_table[i]; \
326 scope type name##_from_string(const char *s) { \
330 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
331 if (name##_table[i] && \
332 streq(name##_table[i], s)) \
336 struct __useless_struct_to_allow_trailing_semicolon__
338 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
339 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
341 /* For string conversions where numbers are also acceptable */
342 #define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max) \
343 int name##_to_string_alloc(type i, char **str) { \
346 if (i < 0 || i > max) \
348 if (i < (type) ELEMENTSOF(name##_table)) { \
349 s = strdup(name##_table[i]); \
353 r = asprintf(&s, "%u", i); \
360 type name##_from_string(const char *s) { \
364 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
365 if (name##_table[i] && \
366 streq(name##_table[i], s)) \
368 if (safe_atou(s, &u) >= 0 && u <= max) \
372 struct __useless_struct_to_allow_trailing_semicolon__
374 int fd_nonblock(int fd, bool nonblock);
375 int fd_cloexec(int fd, bool cloexec);
377 int close_all_fds(const int except[], unsigned n_except);
379 bool fstype_is_network(const char *fstype);
383 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
384 int ask(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
386 int reset_terminal_fd(int fd, bool switch_to_text);
387 int reset_terminal(const char *name);
389 int open_terminal(const char *name, int mode);
390 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
391 int release_terminal(void);
393 int flush_fd(int fd);
395 int ignore_signals(int sig, ...);
396 int default_signals(int sig, ...);
397 int sigaction_many(const struct sigaction *sa, ...);
399 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
401 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
402 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
404 bool is_device_path(const char *path);
406 int dir_is_empty(const char *path);
407 char* dirname_malloc(const char *path);
409 void rename_process(const char name[8]);
411 void sigset_add_many(sigset_t *ss, ...);
412 int sigprocmask_many(int how, ...);
414 bool hostname_is_set(void);
416 char* gethostname_malloc(void);
417 char* getlogname_malloc(void);
418 char* getusername_malloc(void);
420 int getttyname_malloc(int fd, char **r);
421 int getttyname_harder(int fd, char **r);
423 int get_ctty_devnr(pid_t pid, dev_t *d);
424 int get_ctty(pid_t, dev_t *_devnr, char **r);
426 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
427 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
429 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
430 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
431 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
432 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
434 int pipe_eof(int fd);
436 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
438 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
439 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
441 int fd_columns(int fd);
442 unsigned columns(void);
443 int fd_lines(int fd);
444 unsigned lines(void);
445 void columns_lines_cache_reset(int _unused_ signum);
449 static inline const char *ansi_highlight(void) {
450 return on_tty() ? ANSI_HIGHLIGHT_ON : "";
453 static inline const char *ansi_highlight_red(void) {
454 return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
457 static inline const char *ansi_highlight_green(void) {
458 return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
461 static inline const char *ansi_highlight_yellow(void) {
462 return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
465 static inline const char *ansi_highlight_blue(void) {
466 return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
469 static inline const char *ansi_highlight_off(void) {
470 return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
473 int files_same(const char *filea, const char *fileb);
475 int running_in_chroot(void);
477 char *ellipsize(const char *s, size_t length, unsigned percent);
479 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
481 int touch(const char *path);
483 char *unquote(const char *s, const char *quotes);
484 char *normalize_env_assignment(const char *s);
486 int wait_for_terminate(pid_t pid, siginfo_t *status);
487 int wait_for_terminate_and_warn(const char *name, pid_t pid);
489 noreturn void freeze(void);
491 bool null_or_empty(struct stat *st) _pure_;
492 int null_or_empty_path(const char *fn);
494 DIR *xopendirat(int dirfd, const char *name, int flags);
496 char *fstab_node_to_udev_node(const char *p);
498 char *resolve_dev_console(char **active);
499 bool tty_is_vc(const char *tty);
500 bool tty_is_vc_resolve(const char *tty);
501 bool tty_is_console(const char *tty) _pure_;
502 int vtnr_from_tty(const char *tty);
503 const char *default_term_for_tty(const char *tty);
505 void execute_directory(const char *directory, DIR *_d, usec_t timeout, char *argv[]);
507 int kill_and_sigcont(pid_t pid, int sig);
509 bool nulstr_contains(const char*nulstr, const char *needle);
511 bool plymouth_running(void);
513 bool hostname_is_valid(const char *s) _pure_;
514 char* hostname_cleanup(char *s, bool lowercase);
516 char* strshorten(char *s, size_t l);
518 int terminal_vhangup_fd(int fd);
519 int terminal_vhangup(const char *name);
521 int vt_disallocate(const char *name);
523 int copy_file(const char *from, const char *to, int flags);
525 int symlink_atomic(const char *from, const char *to);
527 int fchmod_umask(int fd, mode_t mode);
529 bool display_is_local(const char *display) _pure_;
530 int socket_from_display(const char *display, char **path);
532 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
533 int get_group_creds(const char **groupname, gid_t *gid);
535 int in_gid(gid_t gid);
536 int in_group(const char *name);
538 char* uid_to_name(uid_t uid);
539 char* gid_to_name(gid_t gid);
541 int glob_exists(const char *path);
542 int glob_extend(char ***strv, const char *path);
544 int dirent_ensure_type(DIR *d, struct dirent *de);
546 int in_search_path(const char *path, char **search);
547 int get_files_in_directory(const char *path, char ***list);
549 char *strjoin(const char *x, ...) _sentinel_;
551 bool is_main_thread(void);
553 static inline bool _pure_ in_charset(const char *s, const char* charset) {
556 return s[strspn(s, charset)] == '\0';
559 int block_get_whole_disk(dev_t d, dev_t *ret);
561 int file_is_priv_sticky(const char *p);
563 int strdup_or_null(const char *a, char **b);
565 #define NULSTR_FOREACH(i, l) \
566 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
568 #define NULSTR_FOREACH_PAIR(i, j, l) \
569 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
571 int ioprio_class_to_string_alloc(int i, char **s);
572 int ioprio_class_from_string(const char *s);
574 const char *sigchld_code_to_string(int i) _const_;
575 int sigchld_code_from_string(const char *s) _pure_;
577 int log_facility_unshifted_to_string_alloc(int i, char **s);
578 int log_facility_unshifted_from_string(const char *s);
580 int log_level_to_string_alloc(int i, char **s);
581 int log_level_from_string(const char *s);
583 int sched_policy_to_string_alloc(int i, char **s);
584 int sched_policy_from_string(const char *s);
586 const char *rlimit_to_string(int i) _const_;
587 int rlimit_from_string(const char *s) _pure_;
589 int ip_tos_to_string_alloc(int i, char **s);
590 int ip_tos_from_string(const char *s);
592 const char *signal_to_string(int i) _const_;
593 int signal_from_string(const char *s) _pure_;
595 int signal_from_string_try_harder(const char *s);
597 extern int saved_argc;
598 extern char **saved_argv;
600 bool kexec_loaded(void);
602 int prot_from_flags(int flags) _const_;
604 char *format_bytes(char *buf, size_t l, off_t t);
606 int fd_wait_for_event(int fd, int event, usec_t timeout);
608 void* memdup(const void *p, size_t l) _alloc_(2);
610 int is_kernel_thread(pid_t pid);
612 int fd_inc_sndbuf(int fd, size_t n);
613 int fd_inc_rcvbuf(int fd, size_t n);
615 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
617 int setrlimit_closest(int resource, const struct rlimit *rlim);
619 int getenv_for_pid(pid_t pid, const char *field, char **_value);
621 bool is_valid_documentation_url(const char *url) _pure_;
623 bool in_initrd(void);
625 void warn_melody(void);
627 int get_home_dir(char **ret);
628 int get_shell(char **_ret);
630 static inline void freep(void *p) {
634 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func) \
635 static inline void func##p(type *p) { \
639 struct __useless_struct_to_allow_trailing_semicolon__
641 static inline void closep(int *fd) {
645 static inline void umaskp(mode_t *u) {
649 static inline void close_pairp(int (*p)[2]) {
653 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, fclose);
654 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
655 DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
656 DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
658 #define _cleanup_free_ _cleanup_(freep)
659 #define _cleanup_close_ _cleanup_(closep)
660 #define _cleanup_umask_ _cleanup_(umaskp)
661 #define _cleanup_globfree_ _cleanup_(globfree)
662 #define _cleanup_fclose_ _cleanup_(fclosep)
663 #define _cleanup_pclose_ _cleanup_(pclosep)
664 #define _cleanup_closedir_ _cleanup_(closedirp)
665 #define _cleanup_endmntent_ _cleanup_(endmntentp)
666 #define _cleanup_close_pair_ _cleanup_(close_pairp)
668 _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
669 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
672 return malloc(a * b);
675 _alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
676 if (_unlikely_(b == 0 || a > ((size_t) -1) / b))
679 return memdup(p, a * b);
682 bool filename_is_safe(const char *p) _pure_;
683 bool path_is_safe(const char *p) _pure_;
684 bool string_is_safe(const char *p) _pure_;
685 bool string_has_cc(const char *p) _pure_;
688 * Check if a string contains any glob patterns.
690 _pure_ static inline bool string_is_glob(const char *p) {
691 return !!strpbrk(p, GLOB_CHARS);
694 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
695 int (*compar) (const void *, const void *, void *),
698 bool is_locale_utf8(void);
700 typedef enum DrawSpecialChar {
705 DRAW_TRIANGULAR_BULLET,
708 _DRAW_SPECIAL_CHAR_MAX
711 const char *draw_special_char(DrawSpecialChar ch);
713 char *strreplace(const char *text, const char *old_string, const char *new_string);
715 char *strip_tab_ansi(char **p, size_t *l);
717 int on_ac_power(void);
719 int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f);
720 int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f);
722 #define FOREACH_LINE(line, f, on_error) \
724 if (!fgets(line, sizeof(line), f)) { \
731 #define FOREACH_DIRENT(de, d, on_error) \
732 for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d)) \
738 } else if (ignore_file((de)->d_name)) \
742 static inline void *mempset(void *s, int c, size_t n) {
744 return (uint8_t*)s + n;
747 char *hexmem(const void *p, size_t l);
748 void *unhexmem(const char *p, size_t l);
750 char *strextend(char **x, ...) _sentinel_;
751 char *strrep(const char *s, unsigned n);
753 void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
754 void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
755 #define GREEDY_REALLOC(array, allocated, need) \
756 greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
758 #define GREEDY_REALLOC0(array, allocated, need) \
759 greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
761 static inline void _reset_errno_(int *saved_errno) {
762 errno = *saved_errno;
765 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
767 struct _umask_struct_ {
772 static inline void _reset_umask_(struct _umask_struct_ *s) {
776 #define RUN_WITH_UMASK(mask) \
777 for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
778 !_saved_umask_.quit ; \
779 _saved_umask_.quit = true)
781 static inline unsigned u64log2(uint64_t n) {
782 #if __SIZEOF_LONG_LONG__ == 8
783 return (n > 1) ? (unsigned) __builtin_clzll(n) ^ 63U : 0;
789 static inline unsigned u32ctz(uint32_t n) {
790 #if __SIZEOF_INT__ == 4
791 return __builtin_ctz(n);
797 static inline int log2i(int x) {
800 return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
803 static inline bool logind_running(void) {
804 return access("/run/systemd/seats/", F_OK) >= 0;
807 #define DECIMAL_STR_WIDTH(x) \
809 typeof(x) _x_ = (x); \
816 int unlink_noerrno(const char *path);
822 _new_ = alloca(_len_); \
823 (void *) memset(_new_, 0, _len_); \
826 #define strappenda(a, b) \
828 const char *_a_ = (a), *_b_ = (b); \
833 _c_ = alloca(_x_ + _y_ + 1); \
834 strcpy(stpcpy(_c_, _a_), _b_); \
838 #define strappenda3(a, b, c) \
840 const char *_a_ = (a), *_b_ = (b), *_c_ = (c); \
842 size_t _x_, _y_, _z_; \
846 _d_ = alloca(_x_ + _y_ + _z_ + 1); \
847 strcpy(stpcpy(stpcpy(_d_, _a_), _b_), _c_); \
851 #define procfs_file_alloca(pid, field) \
853 pid_t _pid_ = (pid); \
856 _r_ = ("/proc/self/" field); \
858 _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
859 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
864 struct _locale_struct_ {
865 locale_t saved_locale;
870 static inline void _reset_locale_(struct _locale_struct_ *s) {
872 if (s->saved_locale != (locale_t) 0)
873 uselocale(s->saved_locale);
874 if (s->new_locale != (locale_t) 0)
875 freelocale(s->new_locale);
878 #define RUN_WITH_LOCALE(mask, loc) \
879 for (_cleanup_(_reset_locale_) struct _locale_struct_ _saved_locale_ = { (locale_t) 0, (locale_t) 0, false }; \
881 if (!_saved_locale_.quit) { \
883 _saved_locale_.new_locale = newlocale((mask), (loc), (locale_t) 0); \
884 if (_saved_locale_.new_locale != (locale_t) 0) \
885 _saved_locale_.saved_locale = uselocale(_saved_locale_.new_locale); \
887 !_saved_locale_.quit; }) ; \
888 _saved_locale_.quit = true)
890 bool id128_is_valid(const char *s) _pure_;
892 int split_pair(const char *s, const char *sep, char **l, char **r);
894 int shall_restore_state(void);
897 * Normal qsort requires base to be nonnull. Here were require
898 * that only if nmemb > 0.
900 static inline void qsort_safe(void *base, size_t nmemb, size_t size,
901 int (*compar)(const void *, const void *)) {
904 qsort(base, nmemb, size, compar);
908 int proc_cmdline(char **ret);
909 int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
911 int container_get_leader(const char *machine, pid_t *pid);
913 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd);
914 int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd);
916 bool pid_is_alive(pid_t pid);
917 bool pid_is_unwaited(pid_t pid);
919 int getpeercred(int fd, struct ucred *ucred);
920 int getpeersec(int fd, char **ret);
922 int writev_safe(int fd, const struct iovec *w, int j);
924 int mkostemp_safe(char *pattern, int flags);
925 int open_tmpfile(const char *path, int flags);
927 int fd_warn_permissions(const char *path, int fd);
929 unsigned long personality_from_string(const char *p);
930 const char *personality_to_string(unsigned long);
932 uint64_t physical_memory(void);
934 char* mount_test_option(const char *haystack, const char *needle);
936 void hexdump(FILE *f, const void *p, size_t s);
938 union file_handle_union {
939 struct file_handle handle;
940 char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
943 int update_reboot_param_file(const char *param);