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/resource.h>
40 typedef uint64_t usec_t;
41 typedef uint64_t nsec_t;
43 typedef struct dual_timestamp {
48 #define MSEC_PER_SEC 1000ULL
49 #define USEC_PER_SEC 1000000ULL
50 #define USEC_PER_MSEC 1000ULL
51 #define NSEC_PER_SEC 1000000000ULL
52 #define NSEC_PER_MSEC 1000000ULL
53 #define NSEC_PER_USEC 1000ULL
55 #define USEC_PER_MINUTE (60ULL*USEC_PER_SEC)
56 #define NSEC_PER_MINUTE (60ULL*NSEC_PER_SEC)
57 #define USEC_PER_HOUR (60ULL*USEC_PER_MINUTE)
58 #define NSEC_PER_HOUR (60ULL*NSEC_PER_MINUTE)
59 #define USEC_PER_DAY (24ULL*USEC_PER_HOUR)
60 #define NSEC_PER_DAY (24ULL*NSEC_PER_HOUR)
61 #define USEC_PER_WEEK (7ULL*USEC_PER_DAY)
62 #define NSEC_PER_WEEK (7ULL*NSEC_PER_DAY)
63 #define USEC_PER_MONTH (2629800ULL*USEC_PER_SEC)
64 #define NSEC_PER_MONTH (2629800ULL*NSEC_PER_SEC)
65 #define USEC_PER_YEAR (31557600ULL*USEC_PER_SEC)
66 #define NSEC_PER_YEAR (31557600ULL*NSEC_PER_SEC)
68 /* What is interpreted as whitespace? */
69 #define WHITESPACE " \t\n\r"
70 #define NEWLINE "\n\r"
72 #define COMMENTS "#;\n"
74 #define FORMAT_TIMESTAMP_MAX 64
75 #define FORMAT_TIMESTAMP_PRETTY_MAX 256
76 #define FORMAT_TIMESPAN_MAX 64
77 #define FORMAT_BYTES_MAX 8
79 #define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
80 #define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
81 #define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
82 #define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
83 #define ANSI_HIGHLIGHT_OFF "\x1B[0m"
85 usec_t now(clockid_t clock);
87 dual_timestamp* dual_timestamp_get(dual_timestamp *ts);
88 dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u);
90 #define dual_timestamp_is_set(ts) ((ts)->realtime > 0)
92 usec_t timespec_load(const struct timespec *ts);
93 struct timespec *timespec_store(struct timespec *ts, usec_t u);
95 usec_t timeval_load(const struct timeval *tv);
96 struct timeval *timeval_store(struct timeval *tv, usec_t u);
98 size_t page_size(void);
99 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
101 #define streq(a,b) (strcmp((a),(b)) == 0)
102 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
104 bool streq_ptr(const char *a, const char *b);
106 #define new(t, n) ((t*) malloc(sizeof(t)*(n)))
108 #define new0(t, n) ((t*) calloc((n), sizeof(t)))
110 #define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
112 #define newdup(t, p, n) ((t*) memdup(p, sizeof(t)*(n)))
114 #define malloc0(n) (calloc((n), 1))
116 static inline const char* yes_no(bool b) {
117 return b ? "yes" : "no";
120 static inline const char* strempty(const char *s) {
124 static inline const char* strnull(const char *s) {
125 return s ? s : "(null)";
128 static inline const char *strna(const char *s) {
129 return s ? s : "n/a";
132 static inline bool isempty(const char *p) {
136 bool endswith(const char *s, const char *postfix);
137 bool startswith(const char *s, const char *prefix);
138 bool startswith_no_case(const char *s, const char *prefix);
140 bool first_word(const char *s, const char *word);
142 int close_nointr(int fd);
143 void close_nointr_nofail(int fd);
144 void close_many(const int fds[], unsigned n_fd);
146 int parse_boolean(const char *v);
147 int parse_usec(const char *t, usec_t *usec);
148 int parse_nsec(const char *t, nsec_t *nsec);
149 int parse_bytes(const char *t, off_t *bytes);
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);
161 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
162 assert_cc(sizeof(unsigned long) == sizeof(unsigned));
163 return safe_atou(s, (unsigned*) ret_u);
165 static inline int safe_atoli(const char *s, long int *ret_u) {
166 assert_cc(sizeof(long int) == sizeof(int));
167 return safe_atoi(s, (int*) ret_u);
170 static inline int safe_atolu(const char *s, unsigned long *ret_u) {
171 assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
172 return safe_atollu(s, (unsigned long long*) ret_u);
174 static inline int safe_atoli(const char *s, long int *ret_u) {
175 assert_cc(sizeof(long int) == sizeof(long long int));
176 return safe_atolli(s, (long long int*) ret_u);
180 static inline int safe_atou32(const char *s, uint32_t *ret_u) {
181 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
182 return safe_atou(s, (unsigned*) ret_u);
185 static inline int safe_atoi32(const char *s, int32_t *ret_i) {
186 assert_cc(sizeof(int32_t) == sizeof(int));
187 return safe_atoi(s, (int*) ret_i);
190 static inline int safe_atou64(const char *s, uint64_t *ret_u) {
191 assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
192 return safe_atollu(s, (unsigned long long*) ret_u);
195 static inline int safe_atoi64(const char *s, int64_t *ret_i) {
196 assert_cc(sizeof(int64_t) == sizeof(long long int));
197 return safe_atolli(s, (long long int*) ret_i);
200 char *split(const char *c, size_t *l, const char *separator, char **state);
201 char *split_quoted(const char *c, size_t *l, char **state);
203 #define FOREACH_WORD(word, length, s, state) \
204 for ((state) = NULL, (word) = split((s), &(length), WHITESPACE, &(state)); (word); (word) = split((s), &(length), WHITESPACE, &(state)))
206 #define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
207 for ((state) = NULL, (word) = split((s), &(length), (separator), &(state)); (word); (word) = split((s), &(length), (separator), &(state)))
209 #define FOREACH_WORD_QUOTED(word, length, s, state) \
210 for ((state) = NULL, (word) = split_quoted((s), &(length), &(state)); (word); (word) = split_quoted((s), &(length), &(state)))
212 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
213 int get_starttime_of_pid(pid_t pid, unsigned long long *st);
215 int write_one_line_file(const char *fn, const char *line);
216 int write_one_line_file_atomic(const char *fn, const char *line);
217 int read_one_line_file(const char *fn, char **line);
218 int read_full_file(const char *fn, char **contents, size_t *size);
220 int parse_env_file(const char *fname, const char *separator, ...) _sentinel_;
221 int load_env_file(const char *fname, char ***l);
222 int write_env_file(const char *fname, char **l);
224 char *strappend(const char *s, const char *suffix);
225 char *strnappend(const char *s, const char *suffix, size_t length);
227 char *replace_env(const char *format, char **env);
228 char **replace_env_argv(char **argv, char **env);
230 int readlink_malloc(const char *p, char **r);
231 int readlink_and_make_absolute(const char *p, char **r);
232 int readlink_and_canonicalize(const char *p, char **r);
234 int reset_all_signal_handlers(void);
236 char *strstrip(char *s);
237 char *delete_chars(char *s, const char *bad);
238 char *truncate_nl(char *s);
240 char *file_in_same_dir(const char *path, const char *filename);
242 int rmdir_parents(const char *path, const char *stop);
244 int get_process_comm(pid_t pid, char **name);
245 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
246 int get_process_exe(pid_t pid, char **name);
247 int get_process_uid(pid_t pid, uid_t *uid);
250 int unhexchar(char c);
252 int unoctchar(char c);
254 int undecchar(char c);
256 char *cescape(const char *s);
257 char *cunescape(const char *s);
258 char *cunescape_length(const char *s, size_t length);
259 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
261 char *xescape(const char *s, const char *bad);
263 char *bus_path_escape(const char *s);
264 char *bus_path_unescape(const char *s);
266 char *ascii_strlower(char *path);
268 bool dirent_is_file(const struct dirent *de);
269 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix);
271 bool ignore_file(const char *filename);
273 bool chars_intersect(const char *a, const char *b);
275 char *format_timestamp(char *buf, size_t l, usec_t t);
276 char *format_timestamp_pretty(char *buf, size_t l, usec_t t);
277 char *format_timespan(char *buf, size_t l, usec_t t);
279 int make_stdio(int fd);
280 int make_null_stdio(void);
281 int make_console_stdio(void);
283 unsigned long long random_ull(void);
285 #define __DEFINE_STRING_TABLE_LOOKUP(name,type,scope) \
286 scope const char *name##_to_string(type i) { \
287 if (i < 0 || i >= (type) ELEMENTSOF(name##_table)) \
289 return name##_table[i]; \
291 scope type name##_from_string(const char *s) { \
295 for (i = 0; i < (type)ELEMENTSOF(name##_table); i++) \
296 if (name##_table[i] && \
297 streq(name##_table[i], s)) \
299 if (safe_atou(s, &u) >= 0 && \
300 u < ELEMENTSOF(name##_table)) \
304 struct __useless_struct_to_allow_trailing_semicolon__
306 #define DEFINE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,)
307 #define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) __DEFINE_STRING_TABLE_LOOKUP(name,type,static)
309 int fd_nonblock(int fd, bool nonblock);
310 int fd_cloexec(int fd, bool cloexec);
312 int close_all_fds(const int except[], unsigned n_except);
314 bool fstype_is_network(const char *fstype);
318 int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
319 int ask(char *ret, const char *replies, const char *text, ...);
321 int reset_terminal_fd(int fd, bool switch_to_text);
322 int reset_terminal(const char *name);
324 int open_terminal(const char *name, int mode);
325 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
326 int release_terminal(void);
328 int flush_fd(int fd);
330 int ignore_signals(int sig, ...);
331 int default_signals(int sig, ...);
332 int sigaction_many(const struct sigaction *sa, ...);
334 int close_pipe(int p[]);
335 int fopen_temporary(const char *path, FILE **_f, char **_temp_path);
337 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
338 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
340 bool is_device_path(const char *path);
342 int dir_is_empty(const char *path);
344 void rename_process(const char name[8]);
346 void sigset_add_many(sigset_t *ss, ...);
348 bool hostname_is_set(void);
350 char* gethostname_malloc(void);
351 char* getlogname_malloc(void);
352 char* getusername_malloc(void);
354 int getttyname_malloc(int fd, char **r);
355 int getttyname_harder(int fd, char **r);
357 int get_ctty_devnr(pid_t pid, dev_t *d);
358 int get_ctty(pid_t, dev_t *_devnr, char **r);
360 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
361 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
363 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
364 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev);
365 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
366 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky);
368 int pipe_eof(int fd);
370 cpu_set_t* cpu_set_malloc(unsigned *ncpus);
372 void status_vprintf(const char *status, bool ellipse, const char *format, va_list ap);
373 void status_printf(const char *status, bool ellipse, const char *format, ...);
374 void status_welcome(void);
376 int fd_columns(int fd);
377 unsigned columns(void);
378 unsigned columns_uncached(void);
380 int fd_lines(int fd);
381 unsigned lines(void);
383 int running_in_chroot(void);
385 char *ellipsize(const char *s, size_t length, unsigned percent);
386 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
388 int touch(const char *path);
390 char *unquote(const char *s, const char *quotes);
391 char *normalize_env_assignment(const char *s);
393 int wait_for_terminate(pid_t pid, siginfo_t *status);
394 int wait_for_terminate_and_warn(const char *name, pid_t pid);
396 _noreturn_ void freeze(void);
398 bool null_or_empty(struct stat *st);
399 int null_or_empty_path(const char *fn);
401 DIR *xopendirat(int dirfd, const char *name, int flags);
403 void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
404 void dual_timestamp_deserialize(const char *value, dual_timestamp *t);
406 char *fstab_node_to_udev_node(const char *p);
408 bool tty_is_vc(const char *tty);
409 bool tty_is_vc_resolve(const char *tty);
410 bool tty_is_console(const char *tty);
411 int vtnr_from_tty(const char *tty);
412 const char *default_term_for_tty(const char *tty);
414 void execute_directory(const char *directory, DIR *_d, char *argv[]);
416 int kill_and_sigcont(pid_t pid, int sig);
418 bool nulstr_contains(const char*nulstr, const char *needle);
420 bool plymouth_running(void);
422 void parse_syslog_priority(char **p, int *priority);
423 void skip_syslog_pid(char **buf);
424 void skip_syslog_date(char **buf);
426 bool hostname_is_valid(const char *s);
427 char* hostname_cleanup(char *s);
429 char* strshorten(char *s, size_t l);
431 int terminal_vhangup_fd(int fd);
432 int terminal_vhangup(const char *name);
434 int vt_disallocate(const char *name);
436 int copy_file(const char *from, const char *to);
437 int symlink_or_copy(const char *from, const char *to);
438 int symlink_or_copy_atomic(const char *from, const char *to);
440 int fchmod_umask(int fd, mode_t mode);
442 bool display_is_local(const char *display);
443 int socket_from_display(const char *display, char **path);
445 int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home, const char **shell);
446 int get_group_creds(const char **groupname, gid_t *gid);
448 int in_group(const char *name);
450 int glob_exists(const char *path);
452 int dirent_ensure_type(DIR *d, struct dirent *de);
454 int in_search_path(const char *path, char **search);
455 int get_files_in_directory(const char *path, char ***list);
457 char *strjoin(const char *x, ...) _sentinel_;
459 bool is_main_thread(void);
461 bool in_charset(const char *s, const char* charset);
463 int block_get_whole_disk(dev_t d, dev_t *ret);
465 int file_is_priv_sticky(const char *p);
467 int strdup_or_null(const char *a, char **b);
469 #define NULSTR_FOREACH(i, l) \
470 for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)
472 #define NULSTR_FOREACH_PAIR(i, j, l) \
473 for ((i) = (l), (j) = strchr((i), 0)+1; (i) && *(i); (i) = strchr((j), 0)+1, (j) = *(i) ? strchr((i), 0)+1 : (i))
475 const char *ioprio_class_to_string(int i);
476 int ioprio_class_from_string(const char *s);
478 const char *sigchld_code_to_string(int i);
479 int sigchld_code_from_string(const char *s);
481 const char *log_facility_unshifted_to_string(int i);
482 int log_facility_unshifted_from_string(const char *s);
484 const char *log_level_to_string(int i);
485 int log_level_from_string(const char *s);
487 const char *sched_policy_to_string(int i);
488 int sched_policy_from_string(const char *s);
490 const char *rlimit_to_string(int i);
491 int rlimit_from_string(const char *s);
493 const char *ip_tos_to_string(int i);
494 int ip_tos_from_string(const char *s);
496 const char *signal_to_string(int i);
497 int signal_from_string(const char *s);
499 int signal_from_string_try_harder(const char *s);
501 extern int saved_argc;
502 extern char **saved_argv;
504 bool kexec_loaded(void);
506 int prot_from_flags(int flags);
508 char *format_bytes(char *buf, size_t l, off_t t);
510 int fd_wait_for_event(int fd, int event, usec_t timeout);
512 void* memdup(const void *p, size_t l);
514 int is_kernel_thread(pid_t pid);
516 int fd_inc_sndbuf(int fd, size_t n);
517 int fd_inc_rcvbuf(int fd, size_t n);
519 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...);
521 int setrlimit_closest(int resource, const struct rlimit *rlim);
523 int getenv_for_pid(pid_t pid, const char *field, char **_value);
525 int can_sleep(const char *type);
527 bool is_valid_documentation_url(const char *url);
529 bool in_initrd(void);
531 void warn_melody(void);
533 int get_shell(char **ret);
534 int get_home_dir(char **ret);