1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
14 usec_t now(clockid_t clock) {
17 assert_se(clock_gettime(clock, &ts) == 0);
19 return timespec_load(&ts);
22 usec_t timespec_load(const struct timespec *ts) {
26 (usec_t) ts->tv_sec * USEC_PER_SEC +
27 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
30 struct timespec *timespec_store(struct timespec *ts, usec_t u) {
33 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
34 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
39 usec_t timeval_load(const struct timeval *tv) {
43 (usec_t) tv->tv_sec * USEC_PER_SEC +
47 struct timeval *timeval_store(struct timeval *tv, usec_t u) {
50 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
51 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
56 bool endswith(const char *s, const char *postfix) {
68 return memcmp(s + sl - pl, postfix, pl) == 0;
71 bool startswith(const char *s, const char *prefix) {
83 return memcmp(s, prefix, pl) == 0;
86 int close_nointr(int fd) {
92 if ((r = close(fd)) >= 0)
100 void close_nointr_nofail(int fd) {
102 /* like close_nointr() but cannot fail, and guarantees errno
105 assert_se(close_nointr(fd) == 0);
108 int parse_boolean(const char *v) {
111 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
113 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
119 int safe_atou(const char *s, unsigned *ret_u) {
127 l = strtoul(s, &x, 0);
129 if (!x || *x || errno)
130 return errno ? -errno : -EINVAL;
132 if ((unsigned long) (unsigned) l != l)
135 *ret_u = (unsigned) l;
139 int safe_atoi(const char *s, int *ret_i) {
147 l = strtol(s, &x, 0);
149 if (!x || *x || errno)
150 return errno ? -errno : -EINVAL;
152 if ((long) (int) l != l)
159 int safe_atolu(const char *s, long unsigned *ret_lu) {
167 l = strtoul(s, &x, 0);
169 if (!x || *x || errno)
170 return errno ? -errno : -EINVAL;
176 int safe_atoli(const char *s, long int *ret_li) {
184 l = strtol(s, &x, 0);
186 if (!x || *x || errno)
187 return errno ? -errno : -EINVAL;
193 int safe_atollu(const char *s, long long unsigned *ret_llu) {
195 unsigned long long l;
201 l = strtoull(s, &x, 0);
203 if (!x || *x || errno)
204 return errno ? -errno : -EINVAL;
210 int safe_atolli(const char *s, long long int *ret_lli) {
218 l = strtoll(s, &x, 0);
220 if (!x || *x || errno)
221 return errno ? -errno : -EINVAL;
227 /* Split a string into words. */
228 char *split_spaces(const char *c, size_t *l, char **state) {
231 current = *state ? *state : (char*) c;
233 if (!*current || *c == 0)
236 current += strspn(current, WHITESPACE);
237 *l = strcspn(current, WHITESPACE);
240 return (char*) current;
243 /* Split a string into words, but consider strings enclosed in '' and
244 * "" as words even if they include spaces. */
245 char *split_quoted(const char *c, size_t *l, char **state) {
248 current = *state ? *state : (char*) c;
250 if (!*current || *c == 0)
253 current += strspn(current, WHITESPACE);
255 if (*current == '\'') {
257 *l = strcspn(current, "'");
262 } else if (*current == '\"') {
264 *l = strcspn(current, "\"");
270 *l = strcspn(current, WHITESPACE);
274 /* FIXME: Cannot deal with strings that have spaces AND ticks
277 return (char*) current;
280 const char *sigchld_code(int code) {
282 if (code == CLD_EXITED)
284 else if (code == CLD_KILLED)
286 else if (code == CLD_DUMPED)
288 else if (code == CLD_TRAPPED)
290 else if (code == CLD_STOPPED)
292 else if (code == CLD_CONTINUED)
298 int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
301 char fn[132], line[256], *p;
302 long long unsigned ppid;
307 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%llu/stat", (unsigned long long) pid) < (int) (sizeof(fn)-1));
308 fn[sizeof(fn)-1] = 0;
310 if (!(f = fopen(fn, "r")))
313 if (!(fgets(line, sizeof(line), f))) {
321 /* Let's skip the pid and comm fields. The latter is enclosed
322 * in () but does not escape any () in its value, so let's
323 * skip over it manually */
325 if (!(p = strrchr(line, ')')))
336 if ((long long unsigned) (pid_t) ppid != ppid)
339 *_ppid = (pid_t) ppid;
344 int write_one_line_file(const char *fn, const char *line) {
351 if (!(f = fopen(fn, "we")))
354 if (fputs(line, f) < 0) {
365 int read_one_line_file(const char *fn, char **line) {
373 if (!(f = fopen(fn, "re")))
376 if (!(fgets(t, sizeof(t), f))) {
381 if (!(c = strdup(t))) {
394 char *strappend(const char *s, const char *suffix) {
404 if (!(r = new(char, a+b+1)))
408 memcpy(r+a, suffix, b);
414 int readlink_malloc(const char *p, char **r) {
424 if (!(c = new(char, l)))
427 if ((n = readlink(p, c, l-1)) < 0) {
433 if ((size_t) n < l-1) {
444 char *file_name_from_path(const char *p) {
449 if ((r = strrchr(p, '/')))
455 bool path_is_absolute(const char *p) {
461 bool is_path(const char *p) {
463 return !!strchr(p, '/');
466 char *path_make_absolute(const char *p, const char *prefix) {
471 if (path_is_absolute(p) || !prefix)
474 if (asprintf(&r, "%s/%s", prefix, p) < 0)
480 int reset_all_signal_handlers(void) {
483 for (sig = 1; sig < _NSIG; sig++) {
486 if (sig == SIGKILL || sig == SIGSTOP)
490 sa.sa_handler = SIG_DFL;
491 sa.sa_flags = SA_RESTART;
493 /* On Linux the first two RT signals are reserved by
494 * glibc, and sigaction() will return EINVAL for them. */
495 if ((sigaction(sig, &sa, NULL) < 0))
503 char *strstrip(char *s) {
506 /* Drops trailing whitespace. Modifies the string in
507 * place. Returns pointer to first non-space character */
509 s += strspn(s, WHITESPACE);
512 if (!strchr(WHITESPACE, *e))
524 char *file_in_same_dir(const char *path, const char *filename) {
531 /* This removes the last component of path and appends
532 * filename, unless the latter is absolute anyway or the
535 if (path_is_absolute(filename))
536 return strdup(filename);
538 if (!(e = strrchr(path, '/')))
539 return strdup(filename);
541 k = strlen(filename);
542 if (!(r = new(char, e-path+1+k+1)))
545 memcpy(r, path, e-path+1);
546 memcpy(r+(e-path)+1, filename, k+1);
551 char hexchar(int x) {
552 static const char table[16] = "0123456789abcdef";
554 return table[x & 15];
557 int unhexchar(char c) {
559 if (c >= '0' && c <= '9')
562 if (c >= 'a' && c <= 'f')
565 if (c >= 'A' && c <= 'F')
571 char octchar(int x) {
572 return '0' + (x & 7);
575 int unoctchar(char c) {
577 if (c >= '0' && c <= '7')
583 char *cescape(const char *s) {
589 /* Does C style string escaping. */
591 if (!(r = new(char, strlen(s)*4 + 1)))
594 for (f = s, t = r; *f; f++)
640 /* For special chars we prefer octal over
641 * hexadecimal encoding, simply because glib's
642 * g_strescape() does the same */
643 if ((*f < ' ') || (*f >= 127)) {
645 *(t++) = octchar((unsigned char) *f >> 6);
646 *(t++) = octchar((unsigned char) *f >> 3);
647 *(t++) = octchar((unsigned char) *f);
658 char *cunescape(const char *s) {
664 /* Undoes C style string escaping */
666 if (!(r = new(char, strlen(s)+1)))
669 for (f = s, t = r; *f; f++) {
712 /* hexadecimal encoding */
715 if ((a = unhexchar(f[1])) < 0 ||
716 (b = unhexchar(f[2])) < 0) {
717 /* Invalid escape code, let's take it literal then */
721 *(t++) = (char) ((a << 4) | b);
739 if ((a = unoctchar(f[0])) < 0 ||
740 (b = unoctchar(f[1])) < 0 ||
741 (c = unoctchar(f[2])) < 0) {
742 /* Invalid escape code, let's take it literal then */
746 *(t++) = (char) ((a << 6) | (b << 3) | c);
754 /* premature end of string.*/
759 /* Invalid escape code, let's take it literal then */
772 char *xescape(const char *s, const char *bad) {
776 /* Escapes all chars in bad, in addition to \ and all special
777 * chars, in \xFF style escaping. May be reversed with
780 if (!(r = new(char, strlen(s)*4+1)))
783 for (f = s, t = r; *f; f++) {
785 if (*f < ' ' || *f >= 127 ||
786 *f == '\\' || strchr(bad, *f)) {
789 *(t++) = hexchar(*f >> 4);
790 *(t++) = hexchar(*f);
800 char *path_kill_slashes(char *path) {
804 /* Removes redundant inner and trailing slashes. Modifies the
805 * passed string in-place.
807 * ///foo///bar/ becomes /foo/bar
810 for (f = path, t = path; *f; f++) {
825 /* Special rule, if we are talking of the root directory, a
826 trailing slash is good */
828 if (t == path && slash)
835 bool path_startswith(const char *path, const char *prefix) {
839 if ((path[0] == '/') != (prefix[0] == '/'))
845 path += strspn(path, "/");
846 prefix += strspn(prefix, "/");
854 a = strcspn(path, "/");
855 b = strcspn(prefix, "/");
860 if (memcmp(path, prefix, a) != 0)
868 char *ascii_strlower(char *path) {
873 for (p = path; *p; p++)
874 if (*p >= 'A' && *p <= 'Z')