]>
git.ipfire.org Git - thirdparty/systemd.git/blob - util.c
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 int parse_boolean(const char *v
) {
103 if (streq(v
, "1") || v
[0] == 'y' || v
[0] == 'Y' || v
[0] == 't' || v
[0] == 'T' || !strcasecmp(v
, "on"))
105 else if (streq(v
, "0") || v
[0] == 'n' || v
[0] == 'N' || v
[0] == 'f' || v
[0] == 'F' || !strcasecmp(v
, "off"))
111 int safe_atou(const char *s
, unsigned *ret_u
) {
119 l
= strtoul(s
, &x
, 0);
121 if (!x
|| *x
|| errno
)
122 return errno
? -errno
: -EINVAL
;
124 if ((unsigned long) (unsigned) l
!= l
)
127 *ret_u
= (unsigned) l
;
131 int safe_atoi(const char *s
, int *ret_i
) {
139 l
= strtol(s
, &x
, 0);
141 if (!x
|| *x
|| errno
)
142 return errno
? -errno
: -EINVAL
;
144 if ((long) (int) l
!= l
)
151 int safe_atolu(const char *s
, long unsigned *ret_lu
) {
159 l
= strtoul(s
, &x
, 0);
161 if (!x
|| *x
|| errno
)
162 return errno
? -errno
: -EINVAL
;
168 int safe_atoli(const char *s
, long int *ret_li
) {
176 l
= strtol(s
, &x
, 0);
178 if (!x
|| *x
|| errno
)
179 return errno
? -errno
: -EINVAL
;
185 int safe_atollu(const char *s
, long long unsigned *ret_llu
) {
187 unsigned long long l
;
193 l
= strtoull(s
, &x
, 0);
195 if (!x
|| *x
|| errno
)
196 return errno
? -errno
: -EINVAL
;
202 int safe_atolli(const char *s
, long long int *ret_lli
) {
210 l
= strtoll(s
, &x
, 0);
212 if (!x
|| *x
|| errno
)
213 return errno
? -errno
: -EINVAL
;
219 /* Split a string into words. */
220 char *split_spaces(const char *c
, size_t *l
, char **state
) {
223 current
= *state
? *state
: (char*) c
;
225 if (!*current
|| *c
== 0)
228 current
+= strspn(current
, WHITESPACE
);
229 *l
= strcspn(current
, WHITESPACE
);
232 return (char*) current
;
235 /* Split a string into words, but consider strings enclosed in '' and
236 * "" as words even if they include spaces. */
237 char *split_quoted(const char *c
, size_t *l
, char **state
) {
240 current
= *state
? *state
: (char*) c
;
242 if (!*current
|| *c
== 0)
245 current
+= strspn(current
, WHITESPACE
);
247 if (*current
== '\'') {
249 *l
= strcspn(current
, "'");
254 } else if (*current
== '\"') {
256 *l
= strcspn(current
+1, "\"");
262 *l
= strcspn(current
, WHITESPACE
);
266 /* FIXME: Cannot deal with strings that have spaces AND ticks
269 return (char*) current
;
272 const char *sigchld_code(int code
) {
274 if (code
== CLD_EXITED
)
276 else if (code
== CLD_KILLED
)
278 else if (code
== CLD_DUMPED
)
280 else if (code
== CLD_TRAPPED
)
282 else if (code
== CLD_STOPPED
)
284 else if (code
== CLD_CONTINUED
)
290 int get_parent_of_pid(pid_t pid
, pid_t
*_ppid
) {
293 char fn
[132], line
[256], *p
;
294 long long unsigned ppid
;
299 assert_se(snprintf(fn
, sizeof(fn
)-1, "/proc/%llu/stat", (unsigned long long) pid
) < (int) (sizeof(fn
)-1));
300 fn
[sizeof(fn
)-1] = 0;
302 if (!(f
= fopen(fn
, "r")))
305 if (!(fgets(line
, sizeof(line
), f
))) {
313 /* Let's skip the pid and comm fields. The latter is enclosed
314 * in () but does not escape any () in its value, so let's
315 * skip over it manually */
317 if (!(p
= strrchr(line
, ')')))
328 if ((long long unsigned) (pid_t
) ppid
!= ppid
)
331 *_ppid
= (pid_t
) ppid
;
336 int write_one_line_file(const char *fn
, const char *line
) {
343 if (!(f
= fopen(fn
, "we")))
346 if (fputs(line
, f
) < 0) {
357 int read_one_line_file(const char *fn
, char **line
) {
365 if (!(f
= fopen(fn
, "re")))
368 if (!(fgets(t
, sizeof(t
), f
))) {
373 if (!(c
= strdup(t
))) {
386 char *strappend(const char *s
, const char *suffix
) {
396 if (!(r
= new(char, a
+b
+1)))
400 memcpy(r
+a
, suffix
, b
);