]>
git.ipfire.org Git - thirdparty/systemd.git/blob - util.c
1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
12 #include <sys/resource.h>
19 usec_t
now(clockid_t clock
) {
22 assert_se(clock_gettime(clock
, &ts
) == 0);
24 return timespec_load(&ts
);
27 usec_t
timespec_load(const struct timespec
*ts
) {
31 (usec_t
) ts
->tv_sec
* USEC_PER_SEC
+
32 (usec_t
) ts
->tv_nsec
/ NSEC_PER_USEC
;
35 struct timespec
*timespec_store(struct timespec
*ts
, usec_t u
) {
38 ts
->tv_sec
= (time_t) (u
/ USEC_PER_SEC
);
39 ts
->tv_nsec
= (long int) ((u
% USEC_PER_SEC
) * NSEC_PER_USEC
);
44 usec_t
timeval_load(const struct timeval
*tv
) {
48 (usec_t
) tv
->tv_sec
* USEC_PER_SEC
+
52 struct timeval
*timeval_store(struct timeval
*tv
, usec_t u
) {
55 tv
->tv_sec
= (time_t) (u
/ USEC_PER_SEC
);
56 tv
->tv_usec
= (suseconds_t
) (u
% USEC_PER_SEC
);
61 bool endswith(const char *s
, const char *postfix
) {
73 return memcmp(s
+ sl
- pl
, postfix
, pl
) == 0;
76 bool startswith(const char *s
, const char *prefix
) {
88 return memcmp(s
, prefix
, pl
) == 0;
91 bool first_word(const char *s
, const char *word
) {
103 if (memcmp(s
, word
, wl
) != 0)
106 return (s
[wl
] == 0 ||
107 strchr(WHITESPACE
, s
[wl
]));
110 int close_nointr(int fd
) {
116 if ((r
= close(fd
)) >= 0)
124 void close_nointr_nofail(int fd
) {
126 /* like close_nointr() but cannot fail, and guarantees errno
129 assert_se(close_nointr(fd
) == 0);
132 int parse_boolean(const char *v
) {
135 if (streq(v
, "1") || v
[0] == 'y' || v
[0] == 'Y' || v
[0] == 't' || v
[0] == 'T' || !strcasecmp(v
, "on"))
137 else if (streq(v
, "0") || v
[0] == 'n' || v
[0] == 'N' || v
[0] == 'f' || v
[0] == 'F' || !strcasecmp(v
, "off"))
143 int safe_atou(const char *s
, unsigned *ret_u
) {
151 l
= strtoul(s
, &x
, 0);
153 if (!x
|| *x
|| errno
)
154 return errno
? -errno
: -EINVAL
;
156 if ((unsigned long) (unsigned) l
!= l
)
159 *ret_u
= (unsigned) l
;
163 int safe_atoi(const char *s
, int *ret_i
) {
171 l
= strtol(s
, &x
, 0);
173 if (!x
|| *x
|| errno
)
174 return errno
? -errno
: -EINVAL
;
176 if ((long) (int) l
!= l
)
183 int safe_atolu(const char *s
, long unsigned *ret_lu
) {
191 l
= strtoul(s
, &x
, 0);
193 if (!x
|| *x
|| errno
)
194 return errno
? -errno
: -EINVAL
;
200 int safe_atoli(const char *s
, long int *ret_li
) {
208 l
= strtol(s
, &x
, 0);
210 if (!x
|| *x
|| errno
)
211 return errno
? -errno
: -EINVAL
;
217 int safe_atollu(const char *s
, long long unsigned *ret_llu
) {
219 unsigned long long l
;
225 l
= strtoull(s
, &x
, 0);
227 if (!x
|| *x
|| errno
)
228 return errno
? -errno
: -EINVAL
;
234 int safe_atolli(const char *s
, long long int *ret_lli
) {
242 l
= strtoll(s
, &x
, 0);
244 if (!x
|| *x
|| errno
)
245 return errno
? -errno
: -EINVAL
;
251 /* Split a string into words. */
252 char *split_spaces(const char *c
, size_t *l
, char **state
) {
255 current
= *state
? *state
: (char*) c
;
257 if (!*current
|| *c
== 0)
260 current
+= strspn(current
, WHITESPACE
);
261 *l
= strcspn(current
, WHITESPACE
);
264 return (char*) current
;
267 /* Split a string into words, but consider strings enclosed in '' and
268 * "" as words even if they include spaces. */
269 char *split_quoted(const char *c
, size_t *l
, char **state
) {
272 current
= *state
? *state
: (char*) c
;
274 if (!*current
|| *c
== 0)
277 current
+= strspn(current
, WHITESPACE
);
279 if (*current
== '\'') {
281 *l
= strcspn(current
, "'");
286 } else if (*current
== '\"') {
288 *l
= strcspn(current
, "\"");
294 *l
= strcspn(current
, WHITESPACE
);
298 /* FIXME: Cannot deal with strings that have spaces AND ticks
301 return (char*) current
;
304 int get_parent_of_pid(pid_t pid
, pid_t
*_ppid
) {
307 char fn
[132], line
[256], *p
;
308 long long unsigned ppid
;
313 assert_se(snprintf(fn
, sizeof(fn
)-1, "/proc/%llu/stat", (unsigned long long) pid
) < (int) (sizeof(fn
)-1));
314 fn
[sizeof(fn
)-1] = 0;
316 if (!(f
= fopen(fn
, "r")))
319 if (!(fgets(line
, sizeof(line
), f
))) {
327 /* Let's skip the pid and comm fields. The latter is enclosed
328 * in () but does not escape any () in its value, so let's
329 * skip over it manually */
331 if (!(p
= strrchr(line
, ')')))
342 if ((long long unsigned) (pid_t
) ppid
!= ppid
)
345 *_ppid
= (pid_t
) ppid
;
350 int write_one_line_file(const char *fn
, const char *line
) {
357 if (!(f
= fopen(fn
, "we")))
360 if (fputs(line
, f
) < 0) {
371 int read_one_line_file(const char *fn
, char **line
) {
379 if (!(f
= fopen(fn
, "re")))
382 if (!(fgets(t
, sizeof(t
), f
))) {
387 if (!(c
= strdup(t
))) {
400 char *strappend(const char *s
, const char *suffix
) {
410 if (!(r
= new(char, a
+b
+1)))
414 memcpy(r
+a
, suffix
, b
);
420 int readlink_malloc(const char *p
, char **r
) {
430 if (!(c
= new(char, l
)))
433 if ((n
= readlink(p
, c
, l
-1)) < 0) {
439 if ((size_t) n
< l
-1) {
450 char *file_name_from_path(const char *p
) {
455 if ((r
= strrchr(p
, '/')))
461 bool path_is_absolute(const char *p
) {
467 bool is_path(const char *p
) {
469 return !!strchr(p
, '/');
472 char *path_make_absolute(const char *p
, const char *prefix
) {
477 if (path_is_absolute(p
) || !prefix
)
480 if (asprintf(&r
, "%s/%s", prefix
, p
) < 0)
486 int reset_all_signal_handlers(void) {
489 for (sig
= 1; sig
< _NSIG
; sig
++) {
492 if (sig
== SIGKILL
|| sig
== SIGSTOP
)
496 sa
.sa_handler
= SIG_DFL
;
497 sa
.sa_flags
= SA_RESTART
;
499 /* On Linux the first two RT signals are reserved by
500 * glibc, and sigaction() will return EINVAL for them. */
501 if ((sigaction(sig
, &sa
, NULL
) < 0))
509 char *strstrip(char *s
) {
512 /* Drops trailing whitespace. Modifies the string in
513 * place. Returns pointer to first non-space character */
515 s
+= strspn(s
, WHITESPACE
);
518 if (!strchr(WHITESPACE
, *e
))
530 char *file_in_same_dir(const char *path
, const char *filename
) {
537 /* This removes the last component of path and appends
538 * filename, unless the latter is absolute anyway or the
541 if (path_is_absolute(filename
))
542 return strdup(filename
);
544 if (!(e
= strrchr(path
, '/')))
545 return strdup(filename
);
547 k
= strlen(filename
);
548 if (!(r
= new(char, e
-path
+1+k
+1)))
551 memcpy(r
, path
, e
-path
+1);
552 memcpy(r
+(e
-path
)+1, filename
, k
+1);
557 char hexchar(int x
) {
558 static const char table
[16] = "0123456789abcdef";
560 return table
[x
& 15];
563 int unhexchar(char c
) {
565 if (c
>= '0' && c
<= '9')
568 if (c
>= 'a' && c
<= 'f')
571 if (c
>= 'A' && c
<= 'F')
577 char octchar(int x
) {
578 return '0' + (x
& 7);
581 int unoctchar(char c
) {
583 if (c
>= '0' && c
<= '7')
589 char *cescape(const char *s
) {
595 /* Does C style string escaping. */
597 if (!(r
= new(char, strlen(s
)*4 + 1)))
600 for (f
= s
, t
= r
; *f
; f
++)
646 /* For special chars we prefer octal over
647 * hexadecimal encoding, simply because glib's
648 * g_strescape() does the same */
649 if ((*f
< ' ') || (*f
>= 127)) {
651 *(t
++) = octchar((unsigned char) *f
>> 6);
652 *(t
++) = octchar((unsigned char) *f
>> 3);
653 *(t
++) = octchar((unsigned char) *f
);
664 char *cunescape(const char *s
) {
670 /* Undoes C style string escaping */
672 if (!(r
= new(char, strlen(s
)+1)))
675 for (f
= s
, t
= r
; *f
; f
++) {
718 /* hexadecimal encoding */
721 if ((a
= unhexchar(f
[1])) < 0 ||
722 (b
= unhexchar(f
[2])) < 0) {
723 /* Invalid escape code, let's take it literal then */
727 *(t
++) = (char) ((a
<< 4) | b
);
745 if ((a
= unoctchar(f
[0])) < 0 ||
746 (b
= unoctchar(f
[1])) < 0 ||
747 (c
= unoctchar(f
[2])) < 0) {
748 /* Invalid escape code, let's take it literal then */
752 *(t
++) = (char) ((a
<< 6) | (b
<< 3) | c
);
760 /* premature end of string.*/
765 /* Invalid escape code, let's take it literal then */
778 char *xescape(const char *s
, const char *bad
) {
782 /* Escapes all chars in bad, in addition to \ and all special
783 * chars, in \xFF style escaping. May be reversed with
786 if (!(r
= new(char, strlen(s
)*4+1)))
789 for (f
= s
, t
= r
; *f
; f
++) {
791 if (*f
< ' ' || *f
>= 127 ||
792 *f
== '\\' || strchr(bad
, *f
)) {
795 *(t
++) = hexchar(*f
>> 4);
796 *(t
++) = hexchar(*f
);
806 char *bus_path_escape(const char *s
) {
812 /* Escapes all chars that D-Bus' object path cannot deal
813 * with. Can be reverse with bus_path_unescape() */
815 if (!(r
= new(char, strlen(s
)*3+1)))
818 for (f
= s
, t
= r
; *f
; f
++) {
820 if (!(*f
>= 'A' && *f
<= 'Z') &&
821 !(*f
>= 'a' && *f
<= 'z') &&
822 !(*f
>= '0' && *f
<= '9')) {
824 *(t
++) = hexchar(*f
>> 4);
825 *(t
++) = hexchar(*f
);
835 char *bus_path_unescape(const char *s
) {
841 if (!(r
= new(char, strlen(s
)+1)))
844 for (f
= s
, t
= r
; *f
; f
++) {
849 if ((a
= unhexchar(f
[1])) < 0 ||
850 (b
= unhexchar(f
[2])) < 0) {
851 /* Invalid escape code, let's take it literal then */
854 *(t
++) = (char) ((a
<< 4) | b
);
866 char *path_kill_slashes(char *path
) {
870 /* Removes redundant inner and trailing slashes. Modifies the
871 * passed string in-place.
873 * ///foo///bar/ becomes /foo/bar
876 for (f
= path
, t
= path
; *f
; f
++) {
891 /* Special rule, if we are talking of the root directory, a
892 trailing slash is good */
894 if (t
== path
&& slash
)
901 bool path_startswith(const char *path
, const char *prefix
) {
905 if ((path
[0] == '/') != (prefix
[0] == '/'))
911 path
+= strspn(path
, "/");
912 prefix
+= strspn(prefix
, "/");
920 a
= strcspn(path
, "/");
921 b
= strcspn(prefix
, "/");
926 if (memcmp(path
, prefix
, a
) != 0)
934 char *ascii_strlower(char *path
) {
939 for (p
= path
; *p
; p
++)
940 if (*p
>= 'A' && *p
<= 'Z')
946 static const char *const ioprio_class_table
[] = {
947 [IOPRIO_CLASS_NONE
] = "none",
948 [IOPRIO_CLASS_RT
] = "realtime",
949 [IOPRIO_CLASS_BE
] = "best-effort",
950 [IOPRIO_CLASS_IDLE
] = "idle"
953 DEFINE_STRING_TABLE_LOOKUP(ioprio_class
, int);
955 static const char *const sigchld_code_table
[] = {
956 [CLD_EXITED
] = "exited",
957 [CLD_KILLED
] = "killed",
958 [CLD_DUMPED
] = "dumped",
959 [CLD_TRAPPED
] = "trapped",
960 [CLD_STOPPED
] = "stopped",
961 [CLD_CONTINUED
] = "continued",
964 DEFINE_STRING_TABLE_LOOKUP(sigchld_code
, int);
966 static const char *const log_facility_table
[LOG_NFACILITIES
] = {
967 [LOG_FAC(LOG_KERN
)] = "kern",
968 [LOG_FAC(LOG_USER
)] = "user",
969 [LOG_FAC(LOG_MAIL
)] = "mail",
970 [LOG_FAC(LOG_DAEMON
)] = "daemon",
971 [LOG_FAC(LOG_AUTH
)] = "auth",
972 [LOG_FAC(LOG_SYSLOG
)] = "syslog",
973 [LOG_FAC(LOG_LPR
)] = "lpr",
974 [LOG_FAC(LOG_NEWS
)] = "news",
975 [LOG_FAC(LOG_UUCP
)] = "uucp",
976 [LOG_FAC(LOG_CRON
)] = "cron",
977 [LOG_FAC(LOG_AUTHPRIV
)] = "authpriv",
978 [LOG_FAC(LOG_FTP
)] = "ftp",
979 [LOG_FAC(LOG_LOCAL0
)] = "local0",
980 [LOG_FAC(LOG_LOCAL1
)] = "local1",
981 [LOG_FAC(LOG_LOCAL2
)] = "local2",
982 [LOG_FAC(LOG_LOCAL3
)] = "local3",
983 [LOG_FAC(LOG_LOCAL4
)] = "local4",
984 [LOG_FAC(LOG_LOCAL5
)] = "local5",
985 [LOG_FAC(LOG_LOCAL6
)] = "local6",
986 [LOG_FAC(LOG_LOCAL7
)] = "local7"
989 DEFINE_STRING_TABLE_LOOKUP(log_facility
, int);
991 static const char *const log_level_table
[] = {
992 [LOG_EMERG
] = "emerg",
993 [LOG_ALERT
] = "alert",
996 [LOG_WARNING
] = "warning",
997 [LOG_NOTICE
] = "notice",
999 [LOG_DEBUG
] = "debug"
1002 DEFINE_STRING_TABLE_LOOKUP(log_level
, int);
1004 static const char* const sched_policy_table
[] = {
1005 [SCHED_OTHER
] = "other",
1006 [SCHED_BATCH
] = "batch",
1007 [SCHED_IDLE
] = "idle",
1008 [SCHED_FIFO
] = "fifo",
1012 DEFINE_STRING_TABLE_LOOKUP(sched_policy
, int);
1014 static const char* const rlimit_table
[] = {
1015 [RLIMIT_CPU
] = "LimitCPU",
1016 [RLIMIT_FSIZE
] = "LimitFSIZE",
1017 [RLIMIT_DATA
] = "LimitDATA",
1018 [RLIMIT_STACK
] = "LimitSTACK",
1019 [RLIMIT_CORE
] = "LimitCORE",
1020 [RLIMIT_RSS
] = "LimitRSS",
1021 [RLIMIT_NOFILE
] = "LimitNOFILE",
1022 [RLIMIT_AS
] = "LimitAS",
1023 [RLIMIT_NPROC
] = "LimitNPROC",
1024 [RLIMIT_MEMLOCK
] = "LimitMEMLOCK",
1025 [RLIMIT_LOCKS
] = "LimitLOCKS",
1026 [RLIMIT_SIGPENDING
] = "LimitSIGPENDING",
1027 [RLIMIT_MSGQUEUE
] = "LimitMSGQUEUE",
1028 [RLIMIT_NICE
] = "LimitNICE",
1029 [RLIMIT_RTPRIO
] = "LimitRTPRIO",
1030 [RLIMIT_RTTIME
] = "LimitRTTIME"
1033 DEFINE_STRING_TABLE_LOOKUP(rlimit
, int);