1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
12 #include <sys/resource.h>
13 #include <linux/sched.h>
20 usec_t now(clockid_t clock) {
23 assert_se(clock_gettime(clock, &ts) == 0);
25 return timespec_load(&ts);
28 usec_t timespec_load(const struct timespec *ts) {
32 (usec_t) ts->tv_sec * USEC_PER_SEC +
33 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
36 struct timespec *timespec_store(struct timespec *ts, usec_t u) {
39 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
40 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
45 usec_t timeval_load(const struct timeval *tv) {
49 (usec_t) tv->tv_sec * USEC_PER_SEC +
53 struct timeval *timeval_store(struct timeval *tv, usec_t u) {
56 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
57 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
62 bool endswith(const char *s, const char *postfix) {
74 return memcmp(s + sl - pl, postfix, pl) == 0;
77 bool startswith(const char *s, const char *prefix) {
89 return memcmp(s, prefix, pl) == 0;
92 bool first_word(const char *s, const char *word) {
104 if (memcmp(s, word, wl) != 0)
107 return (s[wl] == 0 ||
108 strchr(WHITESPACE, s[wl]));
111 int close_nointr(int fd) {
117 if ((r = close(fd)) >= 0)
125 void close_nointr_nofail(int fd) {
127 /* like close_nointr() but cannot fail, and guarantees errno
130 assert_se(close_nointr(fd) == 0);
133 int parse_boolean(const char *v) {
136 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
138 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
144 int safe_atou(const char *s, unsigned *ret_u) {
152 l = strtoul(s, &x, 0);
154 if (!x || *x || errno)
155 return errno ? -errno : -EINVAL;
157 if ((unsigned long) (unsigned) l != l)
160 *ret_u = (unsigned) l;
164 int safe_atoi(const char *s, int *ret_i) {
172 l = strtol(s, &x, 0);
174 if (!x || *x || errno)
175 return errno ? -errno : -EINVAL;
177 if ((long) (int) l != l)
184 int safe_atolu(const char *s, long unsigned *ret_lu) {
192 l = strtoul(s, &x, 0);
194 if (!x || *x || errno)
195 return errno ? -errno : -EINVAL;
201 int safe_atoli(const char *s, long int *ret_li) {
209 l = strtol(s, &x, 0);
211 if (!x || *x || errno)
212 return errno ? -errno : -EINVAL;
218 int safe_atollu(const char *s, long long unsigned *ret_llu) {
220 unsigned long long l;
226 l = strtoull(s, &x, 0);
228 if (!x || *x || errno)
229 return errno ? -errno : -EINVAL;
235 int safe_atolli(const char *s, long long int *ret_lli) {
243 l = strtoll(s, &x, 0);
245 if (!x || *x || errno)
246 return errno ? -errno : -EINVAL;
252 /* Split a string into words. */
253 char *split_spaces(const char *c, size_t *l, char **state) {
256 current = *state ? *state : (char*) c;
258 if (!*current || *c == 0)
261 current += strspn(current, WHITESPACE);
262 *l = strcspn(current, WHITESPACE);
265 return (char*) current;
268 /* Split a string into words, but consider strings enclosed in '' and
269 * "" as words even if they include spaces. */
270 char *split_quoted(const char *c, size_t *l, char **state) {
273 current = *state ? *state : (char*) c;
275 if (!*current || *c == 0)
278 current += strspn(current, WHITESPACE);
280 if (*current == '\'') {
282 *l = strcspn(current, "'");
287 } else if (*current == '\"') {
289 *l = strcspn(current, "\"");
295 *l = strcspn(current, WHITESPACE);
299 /* FIXME: Cannot deal with strings that have spaces AND ticks
302 return (char*) current;
305 int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
308 char fn[132], line[256], *p;
309 long long unsigned ppid;
314 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%llu/stat", (unsigned long long) pid) < (int) (sizeof(fn)-1));
315 fn[sizeof(fn)-1] = 0;
317 if (!(f = fopen(fn, "r")))
320 if (!(fgets(line, sizeof(line), f))) {
328 /* Let's skip the pid and comm fields. The latter is enclosed
329 * in () but does not escape any () in its value, so let's
330 * skip over it manually */
332 if (!(p = strrchr(line, ')')))
343 if ((long long unsigned) (pid_t) ppid != ppid)
346 *_ppid = (pid_t) ppid;
351 int write_one_line_file(const char *fn, const char *line) {
358 if (!(f = fopen(fn, "we")))
361 if (fputs(line, f) < 0) {
372 int read_one_line_file(const char *fn, char **line) {
380 if (!(f = fopen(fn, "re")))
383 if (!(fgets(t, sizeof(t), f))) {
388 if (!(c = strdup(t))) {
401 char *strappend(const char *s, const char *suffix) {
411 if (!(r = new(char, a+b+1)))
415 memcpy(r+a, suffix, b);
421 int readlink_malloc(const char *p, char **r) {
431 if (!(c = new(char, l)))
434 if ((n = readlink(p, c, l-1)) < 0) {
440 if ((size_t) n < l-1) {
451 char *file_name_from_path(const char *p) {
456 if ((r = strrchr(p, '/')))
462 bool path_is_absolute(const char *p) {
468 bool is_path(const char *p) {
470 return !!strchr(p, '/');
473 char *path_make_absolute(const char *p, const char *prefix) {
478 if (path_is_absolute(p) || !prefix)
481 if (asprintf(&r, "%s/%s", prefix, p) < 0)
487 int reset_all_signal_handlers(void) {
490 for (sig = 1; sig < _NSIG; sig++) {
493 if (sig == SIGKILL || sig == SIGSTOP)
497 sa.sa_handler = SIG_DFL;
498 sa.sa_flags = SA_RESTART;
500 /* On Linux the first two RT signals are reserved by
501 * glibc, and sigaction() will return EINVAL for them. */
502 if ((sigaction(sig, &sa, NULL) < 0))
510 char *strstrip(char *s) {
513 /* Drops trailing whitespace. Modifies the string in
514 * place. Returns pointer to first non-space character */
516 s += strspn(s, WHITESPACE);
519 if (!strchr(WHITESPACE, *e))
531 char *file_in_same_dir(const char *path, const char *filename) {
538 /* This removes the last component of path and appends
539 * filename, unless the latter is absolute anyway or the
542 if (path_is_absolute(filename))
543 return strdup(filename);
545 if (!(e = strrchr(path, '/')))
546 return strdup(filename);
548 k = strlen(filename);
549 if (!(r = new(char, e-path+1+k+1)))
552 memcpy(r, path, e-path+1);
553 memcpy(r+(e-path)+1, filename, k+1);
558 char hexchar(int x) {
559 static const char table[16] = "0123456789abcdef";
561 return table[x & 15];
564 int unhexchar(char c) {
566 if (c >= '0' && c <= '9')
569 if (c >= 'a' && c <= 'f')
572 if (c >= 'A' && c <= 'F')
578 char octchar(int x) {
579 return '0' + (x & 7);
582 int unoctchar(char c) {
584 if (c >= '0' && c <= '7')
590 char *cescape(const char *s) {
596 /* Does C style string escaping. */
598 if (!(r = new(char, strlen(s)*4 + 1)))
601 for (f = s, t = r; *f; f++)
647 /* For special chars we prefer octal over
648 * hexadecimal encoding, simply because glib's
649 * g_strescape() does the same */
650 if ((*f < ' ') || (*f >= 127)) {
652 *(t++) = octchar((unsigned char) *f >> 6);
653 *(t++) = octchar((unsigned char) *f >> 3);
654 *(t++) = octchar((unsigned char) *f);
665 char *cunescape(const char *s) {
671 /* Undoes C style string escaping */
673 if (!(r = new(char, strlen(s)+1)))
676 for (f = s, t = r; *f; f++) {
719 /* hexadecimal encoding */
722 if ((a = unhexchar(f[1])) < 0 ||
723 (b = unhexchar(f[2])) < 0) {
724 /* Invalid escape code, let's take it literal then */
728 *(t++) = (char) ((a << 4) | b);
746 if ((a = unoctchar(f[0])) < 0 ||
747 (b = unoctchar(f[1])) < 0 ||
748 (c = unoctchar(f[2])) < 0) {
749 /* Invalid escape code, let's take it literal then */
753 *(t++) = (char) ((a << 6) | (b << 3) | c);
761 /* premature end of string.*/
766 /* Invalid escape code, let's take it literal then */
779 char *xescape(const char *s, const char *bad) {
783 /* Escapes all chars in bad, in addition to \ and all special
784 * chars, in \xFF style escaping. May be reversed with
787 if (!(r = new(char, strlen(s)*4+1)))
790 for (f = s, t = r; *f; f++) {
792 if (*f < ' ' || *f >= 127 ||
793 *f == '\\' || strchr(bad, *f)) {
796 *(t++) = hexchar(*f >> 4);
797 *(t++) = hexchar(*f);
807 char *bus_path_escape(const char *s) {
813 /* Escapes all chars that D-Bus' object path cannot deal
814 * with. Can be reverse with bus_path_unescape() */
816 if (!(r = new(char, strlen(s)*3+1)))
819 for (f = s, t = r; *f; f++) {
821 if (!(*f >= 'A' && *f <= 'Z') &&
822 !(*f >= 'a' && *f <= 'z') &&
823 !(*f >= '0' && *f <= '9')) {
825 *(t++) = hexchar(*f >> 4);
826 *(t++) = hexchar(*f);
836 char *bus_path_unescape(const char *s) {
842 if (!(r = new(char, strlen(s)+1)))
845 for (f = s, t = r; *f; f++) {
850 if ((a = unhexchar(f[1])) < 0 ||
851 (b = unhexchar(f[2])) < 0) {
852 /* Invalid escape code, let's take it literal then */
855 *(t++) = (char) ((a << 4) | b);
867 char *path_kill_slashes(char *path) {
871 /* Removes redundant inner and trailing slashes. Modifies the
872 * passed string in-place.
874 * ///foo///bar/ becomes /foo/bar
877 for (f = path, t = path; *f; f++) {
892 /* Special rule, if we are talking of the root directory, a
893 trailing slash is good */
895 if (t == path && slash)
902 bool path_startswith(const char *path, const char *prefix) {
906 if ((path[0] == '/') != (prefix[0] == '/'))
912 path += strspn(path, "/");
913 prefix += strspn(prefix, "/");
921 a = strcspn(path, "/");
922 b = strcspn(prefix, "/");
927 if (memcmp(path, prefix, a) != 0)
935 char *ascii_strlower(char *path) {
940 for (p = path; *p; p++)
941 if (*p >= 'A' && *p <= 'Z')
947 static const char *const ioprio_class_table[] = {
948 [IOPRIO_CLASS_NONE] = "none",
949 [IOPRIO_CLASS_RT] = "realtime",
950 [IOPRIO_CLASS_BE] = "best-effort",
951 [IOPRIO_CLASS_IDLE] = "idle"
954 DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
956 static const char *const sigchld_code_table[] = {
957 [CLD_EXITED] = "exited",
958 [CLD_KILLED] = "killed",
959 [CLD_DUMPED] = "dumped",
960 [CLD_TRAPPED] = "trapped",
961 [CLD_STOPPED] = "stopped",
962 [CLD_CONTINUED] = "continued",
965 DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
967 static const char *const log_facility_table[LOG_NFACILITIES] = {
968 [LOG_FAC(LOG_KERN)] = "kern",
969 [LOG_FAC(LOG_USER)] = "user",
970 [LOG_FAC(LOG_MAIL)] = "mail",
971 [LOG_FAC(LOG_DAEMON)] = "daemon",
972 [LOG_FAC(LOG_AUTH)] = "auth",
973 [LOG_FAC(LOG_SYSLOG)] = "syslog",
974 [LOG_FAC(LOG_LPR)] = "lpr",
975 [LOG_FAC(LOG_NEWS)] = "news",
976 [LOG_FAC(LOG_UUCP)] = "uucp",
977 [LOG_FAC(LOG_CRON)] = "cron",
978 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
979 [LOG_FAC(LOG_FTP)] = "ftp",
980 [LOG_FAC(LOG_LOCAL0)] = "local0",
981 [LOG_FAC(LOG_LOCAL1)] = "local1",
982 [LOG_FAC(LOG_LOCAL2)] = "local2",
983 [LOG_FAC(LOG_LOCAL3)] = "local3",
984 [LOG_FAC(LOG_LOCAL4)] = "local4",
985 [LOG_FAC(LOG_LOCAL5)] = "local5",
986 [LOG_FAC(LOG_LOCAL6)] = "local6",
987 [LOG_FAC(LOG_LOCAL7)] = "local7"
990 DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
992 static const char *const log_level_table[] = {
993 [LOG_EMERG] = "emerg",
994 [LOG_ALERT] = "alert",
997 [LOG_WARNING] = "warning",
998 [LOG_NOTICE] = "notice",
1000 [LOG_DEBUG] = "debug"
1003 DEFINE_STRING_TABLE_LOOKUP(log_level, int);
1005 static const char* const sched_policy_table[] = {
1006 [SCHED_OTHER] = "other",
1007 [SCHED_BATCH] = "batch",
1008 [SCHED_IDLE] = "idle",
1009 [SCHED_FIFO] = "fifo",
1013 DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
1015 static const char* const rlimit_table[] = {
1016 [RLIMIT_CPU] = "LimitCPU",
1017 [RLIMIT_FSIZE] = "LimitFSIZE",
1018 [RLIMIT_DATA] = "LimitDATA",
1019 [RLIMIT_STACK] = "LimitSTACK",
1020 [RLIMIT_CORE] = "LimitCORE",
1021 [RLIMIT_RSS] = "LimitRSS",
1022 [RLIMIT_NOFILE] = "LimitNOFILE",
1023 [RLIMIT_AS] = "LimitAS",
1024 [RLIMIT_NPROC] = "LimitNPROC",
1025 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
1026 [RLIMIT_LOCKS] = "LimitLOCKS",
1027 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
1028 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
1029 [RLIMIT_NICE] = "LimitNICE",
1030 [RLIMIT_RTPRIO] = "LimitRTPRIO",
1031 [RLIMIT_RTTIME] = "LimitRTTIME"
1034 DEFINE_STRING_TABLE_LOOKUP(rlimit, int);