1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
7 This file is part of systemd.
9 Copyright 2010 Lennart Poettering
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU Lesser General Public License as published by
13 the Free Software Foundation; either version 2.1 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
40 typedef uint64_t usec_t;
42 typedef struct dual_timestamp {
47 #define MSEC_PER_SEC 1000ULL
48 #define USEC_PER_SEC 1000000ULL
49 #define USEC_PER_MSEC 1000ULL
50 #define NSEC_PER_SEC 1000000000ULL
51 #define NSEC_PER_MSEC 1000000ULL
52 #define NSEC_PER_USEC 1000ULL
54 #define USEC_PER_MINUTE (60ULL*USEC_PER_SEC)
55 #define USEC_PER_HOUR (60ULL*USEC_PER_MINUTE)
56 #define USEC_PER_DAY (24ULL*USEC_PER_HOUR)
57 #define USEC_PER_WEEK (7ULL*USEC_PER_DAY)
58 #define USEC_PER_MONTH (2629800ULL*USEC_PER_SEC)
59 #define USEC_PER_YEAR (31557600ULL*USEC_PER_SEC)
61 /* What is interpreted as whitespace? */
62 #define WHITESPACE " \t\n\r"
63 #define NEWLINE "\n\r"
65 #define COMMENTS "#;\n"
67 #define FORMAT_TIMESTAMP_MAX 64
68 #define FORMAT_TIMESTAMP_PRETTY_MAX 256
69 #define FORMAT_TIMESPAN_MAX 64
70 #define FORMAT_BYTES_MAX 8
72 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
73 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
74 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
75 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
77 usec_t now(clockid_t clock);
79 dual_timestamp* dual_timestamp_get(dual_timestamp *ts);
80 dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u);
82 #define dual_timestamp_is_set(ts) ((ts)->realtime > 0)
84 usec_t timespec_load(const struct timespec *ts);
85 struct timespec *timespec_store(struct timespec *ts, usec_t u);
87 usec_t timeval_load(const struct timeval *tv);
88 struct timeval *timeval_store(struct timeval *tv, usec_t u);
90 size_t page_size(void);
91 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
93 #define streq(a,b) (strcmp((a),(b)) == 0)
94 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
96 bool streq_ptr(const char *a, const char *b);
98 #define new(t, n) ((t*) malloc(sizeof(t)*(n)))
100 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
102 #define malloc0(n) (calloc((n), 1))
104 static inline const char* yes_no(bool b) {
105 return b ? "yes" : "no";
108 static inline const char* strempty(const char *s) {
112 static inline const char* strnull(const char *s) {
113 return s ? s : "(null)";
116 static inline const char *strna(const char *s) {
117 return s ? s : "n/a";
120 static inline bool is_path_absolute(const char *p) {
124 static inline bool isempty(const char *p) {
128 bool endswith(const char *s, const char *postfix);
129 bool startswith(const char *s, const char *prefix);
130 bool startswith_no_case(const char *s, const char *prefix);
132 bool first_word(const char *s, const char *word);
134 int close_nointr(int fd);
135 void close_nointr_nofail(int fd);
136 void close_many(const int fds[], unsigned n_fd);
138 int parse_boolean(const char *v);
139 int parse_usec(const char *t, usec_t *usec);
140 int parse_bytes(const char *t, off_t *bytes);
141 int parse_pid(const char *s, pid_t* ret_pid);
142 int parse_uid(const char *s, uid_t* ret_uid);
143 #define parse_gid(s, ret_uid) parse_uid(s, ret_uid)
145 int safe_atou(const char *s, unsigned *ret_u);
146 int safe_atoi(const char *s, int *ret_i);
148 int safe_atollu(const char *s, unsigned long long *ret_u);
149 int safe_atolli(const char *s, long long int *ret_i);
152 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
153 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
154 return safe_atou(s, (unsigned*) ret_u);
156 static inline int safe_atoli(const char *s, long int *ret_u) {
157 assert_cc(sizeof(long int) == sizeof(int));
158 return safe_atoi(s, (int*) ret_u);
161 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
162 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
163 return safe_atollu(s, (unsigned long long*) ret_u);
165 static inline int safe_atoli(const char *s, long int *ret_u) {
166 assert_cc(sizeof(long int) == sizeof(long long int));
167 return safe_atolli(s, (long long int*) ret_u);
171 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
172 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
173 return safe_atou(s, (unsigned*) ret_u);
176 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
177 assert_cc(sizeof(int32_t) == sizeof(int));
178 return safe_atoi(s, (int*) ret_i);
181 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
182 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
183 return safe_atollu(s, (unsigned long long*) ret_u);
186 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
187 assert_cc(sizeof(int64_t) == sizeof(long long int));
188 return safe_atolli(s, (long long int*) ret_i);
191 char *split(const char *c, size_t *l, const char *separator, char **state);
192 char *split_quoted(const char *c, size_t *l, char **state);
194 #define FOREACH_WORD(word, length, s, state) \
195 for ((state) = NULL, (word) = split((s), &(length), WHITESPACE, &(state)); (word); (word) = split((s), &(length), WHITESPACE, &(state)))
197 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
198 for ((state) = NULL, (word) = split((s), &(length), (separator), &(state)); (word); (word) = split((s), &(length), (separator), &(state)))
200 #define FOREACH_WORD_QUOTED(word, length, s, state) \
201 for ((state) = NULL, (word) = split_quoted((s), &(length), &(state)); (word); (word) = split_quoted((s), &(length), &(state)))
203 char **split_path_and_make_absolute(const char *p);
205 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
206 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
208 int write_one_line_file(const char *fn, const char *line);
209 int write_one_line_file_atomic(const char *fn, const char *line);
210 int read_one_line_file(const char *fn, char **line);
211 int read_full_file(const char *fn, char **contents, size_t *size);
213 int parse_env_file(const char *fname, const char *separator, ...) _sentinel_;
214 int load_env_file(const char *fname, char ***l);
215 int write_env_file(const char *fname, char **l);
217 char *strappend(const char *s, const char *suffix);
218 char *strnappend(const char *s, const char *suffix, size_t length);
220 char *replace_env(const char *format, char **env);
221 char **replace_env_argv(char **argv, char **env);
223 int readlink_malloc(const char *p, char **r);
224 int readlink_and_make_absolute(const char *p, char **r);
225 int readlink_and_canonicalize(const char *p, char **r);
227 char *file_name_from_path(const char *p);
228 bool is_path(const char *p);
230 bool path_is_absolute(const char *p);
231 char *path_make_absolute(const char *p, const char *prefix);
232 char *path_make_absolute_cwd(const char *p);
234 char **strv_path_make_absolute_cwd(char **l);
235 char **strv_path_canonicalize(char **l);
236 char **strv_path_remove_empty(char **l);
238 int reset_all_signal_handlers(void);
240 char *strstrip(char *s);
241 char *delete_chars(char *s, const char *bad);
242 char *truncate_nl(char *s);
244 char *file_in_same_dir(const char *path, const char *filename);
246 int parent_of_path(const char *path, char **parent);
248 int rmdir_parents(const char *path, const char *stop);
250 int get_process_comm(pid_t pid, char **name);
251 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
252 int get_process_exe(pid_t pid, char **name);
253 int get_process_uid(pid_t pid, uid_t *uid);
256 int unhexchar(char c);
258 int unoctchar(char c);
260 int undecchar(char c);
262 char *cescape(const char *s);
263 char *cunescape(const char *s);
264 char *cunescape_length(const char *s, size_t length);
266 char *xescape(const char *s, const char *bad);
268 char *bus_path_escape(const char *s);
269 char *bus_path_unescape(const char *s);
271 char *path_kill_slashes(char *path);
273 bool path_startswith(const char *path, const char *prefix);
274 bool path_equal(const char *a, const char *b);
276 char *ascii_strlower(char *path);
278 bool dirent_is_file(const struct dirent *de);
279 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix);
281 bool ignore_file(const char *filename);
283 bool chars_intersect(const char *a, const char *b);
285 char *format_timestamp(char *buf, size_t l, usec_t t);
286 char *format_timestamp_pretty(char *buf, size_t l, usec_t t);
287 char *format_timespan(char *buf, size_t l, usec_t t);
289 int make_stdio(int fd);
290 int make_null_stdio(void);
292 unsigned long long random_ull(void);
294 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
295 scope const char *name##_to_string(type i) { \
296 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
298 return name##_table[i]; \
300 scope type name##_from_string(const char *s) { \
304 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
305 if (name##_table[i] && \
306 streq(name##_table[i], s)) \
308 if (safe_atou(s, &u) >= 0 && \
309 u < ELEMENTSOF(name##_table)) \
313 struct __useless_struct_to_allow_trailing_semicolon__
315 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
316 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
318 int fd_nonblock(int fd, bool nonblock);
319 int fd_cloexec(int fd, bool cloexec);
321 int close_all_fds(const int except[], unsigned n_except);
323 bool fstype_is_network(const char *fstype);
327 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
328 int ask(char *ret, const char *replies, const char *text, ...);
330 int reset_terminal_fd(int fd, bool switch_to_text);
331 int reset_terminal(const char *name);
333 int open_terminal(const char *name, int mode);
334 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm);
335 int release_terminal(void);
337 int flush_fd(int fd);
339 int ignore_signals(int sig, ...);
340 int default_signals(int sig, ...);
341 int sigaction_many(const struct sigaction *sa, ...);
343 int close_pipe(int p[]);
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 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
349 int path_is_mount_point(const char *path, bool allow_symlink);
351 bool is_device_path(const char *path);
353 int dir_is_empty(const char *path);
355 void rename_process(const char name[8]);
357 void sigset_add_many(sigset_t *ss, ...);
359 char* gethostname_malloc(void);
360 char* getlogname_malloc(void);
362 int getttyname_malloc(int fd, char **r);
363 int getttyname_harder(int fd, char **r);
365 int get_ctty_devnr(pid_t pid, dev_t *d);
366 int get_ctty(pid_t, dev_t *_devnr, char **r);
368 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
369 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
371 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
373 int pipe_eof(int fd);
375 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
377 void status_vprintf(const char *status, bool ellipse, const char *format, va_list ap);
378 void status_printf(const char *status, bool ellipse, const char *format, ...);
379 void status_welcome(void);
381 int fd_columns(int fd);
382 unsigned columns(void);
384 int fd_lines(int fd);
385 unsigned lines(void);
387 int running_in_chroot(void);
389 char *ellipsize(const char *s, size_t length, unsigned percent);
390 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
392 int touch(const char *path);
394 char *unquote(const char *s, const char *quotes);
395 char *normalize_env_assignment(const char *s);
397 int wait_for_terminate(pid_t pid, siginfo_t *status);
398 int wait_for_terminate_and_warn(const char *name, pid_t pid);
400 _noreturn_ void freeze(void);
402 bool null_or_empty(struct stat *st);
403 int null_or_empty_path(const char *fn);
405 DIR *xopendirat(int dirfd, const char *name, int flags);
407 void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
408 void dual_timestamp_deserialize(const char *value, dual_timestamp *t);
410 char *fstab_node_to_udev_node(const char *p);
412 bool tty_is_vc(const char *tty);
413 bool tty_is_vc_resolve(const char *tty);
414 int vtnr_from_tty(const char *tty);
415 const char *default_term_for_tty(const char *tty);
417 void execute_directory(const char *directory, DIR *_d, char *argv[]);
419 int kill_and_sigcont(pid_t pid, int sig);
421 bool nulstr_contains(const char*nulstr, const char *needle);
423 bool plymouth_running(void);
425 void parse_syslog_priority(char **p, int *priority);
426 void skip_syslog_pid(char **buf);
427 void skip_syslog_date(char **buf);
429 bool hostname_is_valid(const char *s);
430 char* hostname_cleanup(char *s);
432 char* strshorten(char *s, size_t l);
434 int terminal_vhangup_fd(int fd);
435 int terminal_vhangup(const char *name);
437 int vt_disallocate(const char *name);
439 int copy_file(const char *from, const char *to);
440 int symlink_or_copy(const char *from, const char *to);
441 int symlink_or_copy_atomic(const char *from, const char *to);
443 int fchmod_umask(int fd, mode_t mode);
445 int conf_files_list(char ***strv, const char *suffix, const char *dir, ...);
447 int hwclock_is_localtime(void);
448 int hwclock_apply_localtime_delta(int *min);
449 int hwclock_reset_localtime_delta(void);
450 int hwclock_get_time(struct tm *tm);
451 int hwclock_set_time(const struct tm *tm);
453 bool display_is_local(const char *display);
454 int socket_from_display(const char *display, char **path);
456 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home);
457 int get_group_creds(const char **groupname, gid_t *gid);
459 int in_group(const char *name);
461 int glob_exists(const char *path);
463 int dirent_ensure_type(DIR *d, struct dirent *de);
465 int in_search_path(const char *path, char **search);
466 int get_files_in_directory(const char *path, char ***list);
468 char *join(const char *x, ...) _sentinel_;
470 bool is_main_thread(void);
472 bool in_charset(const char *s, const char* charset);
474 int block_get_whole_disk(dev_t d, dev_t *ret);
476 int file_is_priv_sticky(const char *p);
478 int strdup_or_null(const char *a, char **b);
480 #define NULSTR_FOREACH(i, l) \
481 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
483 #define NULSTR_FOREACH_PAIR(i, j, l) \
484 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
486 const char *ioprio_class_to_string(int i);
487 int ioprio_class_from_string(const char *s);
489 const char *sigchld_code_to_string(int i);
490 int sigchld_code_from_string(const char *s);
492 const char *log_facility_unshifted_to_string(int i);
493 int log_facility_unshifted_from_string(const char *s);
495 const char *log_level_to_string(int i);
496 int log_level_from_string(const char *s);
498 const char *sched_policy_to_string(int i);
499 int sched_policy_from_string(const char *s);
501 const char *rlimit_to_string(int i);
502 int rlimit_from_string(const char *s);
504 const char *ip_tos_to_string(int i);
505 int ip_tos_from_string(const char *s);
507 const char *signal_to_string(int i);
508 int signal_from_string(const char *s);
510 int signal_from_string_try_harder(const char *s);
512 extern int saved_argc;
513 extern char **saved_argv;
515 bool kexec_loaded(void);
517 int prot_from_flags(int flags);
519 char *format_bytes(char *buf, size_t l, off_t t);
521 int fd_wait_for_event(int fd, int event, usec_t timeout);
523 void* memdup(const void *p, size_t l);
525 int rtc_open(int flags);
527 int is_kernel_thread(pid_t pid);
529 int fd_inc_sndbuf(int fd, size_t n);
530 int fd_inc_rcvbuf(int fd, size_t n);
532 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);