]>
git.ipfire.org Git - people/ms/systemd.git/blob - util.c
1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 #include <sys/resource.h>
32 #include <linux/sched.h>
33 #include <sys/types.h>
37 #include <sys/ioctl.h>
39 #include <linux/tiocl.h>
42 #include <sys/inotify.h>
54 bool streq_ptr(const char *a
, const char *b
) {
56 /* Like streq(), but tries to make sense of NULL pointers */
67 usec_t
now(clockid_t clock_id
) {
70 assert_se(clock_gettime(clock_id
, &ts
) == 0);
72 return timespec_load(&ts
);
75 usec_t
timespec_load(const struct timespec
*ts
) {
79 (usec_t
) ts
->tv_sec
* USEC_PER_SEC
+
80 (usec_t
) ts
->tv_nsec
/ NSEC_PER_USEC
;
83 struct timespec
*timespec_store(struct timespec
*ts
, usec_t u
) {
86 ts
->tv_sec
= (time_t) (u
/ USEC_PER_SEC
);
87 ts
->tv_nsec
= (long int) ((u
% USEC_PER_SEC
) * NSEC_PER_USEC
);
92 usec_t
timeval_load(const struct timeval
*tv
) {
96 (usec_t
) tv
->tv_sec
* USEC_PER_SEC
+
100 struct timeval
*timeval_store(struct timeval
*tv
, usec_t u
) {
103 tv
->tv_sec
= (time_t) (u
/ USEC_PER_SEC
);
104 tv
->tv_usec
= (suseconds_t
) (u
% USEC_PER_SEC
);
109 bool endswith(const char *s
, const char *postfix
) {
116 pl
= strlen(postfix
);
124 return memcmp(s
+ sl
- pl
, postfix
, pl
) == 0;
127 bool startswith(const char *s
, const char *prefix
) {
142 return memcmp(s
, prefix
, pl
) == 0;
145 bool startswith_no_case(const char *s
, const char *prefix
) {
161 for(i
= 0; i
< pl
; ++i
) {
162 if (tolower(s
[i
]) != tolower(prefix
[i
]))
169 bool first_word(const char *s
, const char *word
) {
184 if (memcmp(s
, word
, wl
) != 0)
188 strchr(WHITESPACE
, s
[wl
]);
191 int close_nointr(int fd
) {
197 if ((r
= close(fd
)) >= 0)
205 void close_nointr_nofail(int fd
) {
206 int saved_errno
= errno
;
208 /* like close_nointr() but cannot fail, and guarantees errno
211 assert_se(close_nointr(fd
) == 0);
216 int parse_boolean(const char *v
) {
219 if (streq(v
, "1") || v
[0] == 'y' || v
[0] == 'Y' || v
[0] == 't' || v
[0] == 'T' || !strcasecmp(v
, "on"))
221 else if (streq(v
, "0") || v
[0] == 'n' || v
[0] == 'N' || v
[0] == 'f' || v
[0] == 'F' || !strcasecmp(v
, "off"))
227 int safe_atou(const char *s
, unsigned *ret_u
) {
235 l
= strtoul(s
, &x
, 0);
237 if (!x
|| *x
|| errno
)
238 return errno
? -errno
: -EINVAL
;
240 if ((unsigned long) (unsigned) l
!= l
)
243 *ret_u
= (unsigned) l
;
247 int safe_atoi(const char *s
, int *ret_i
) {
255 l
= strtol(s
, &x
, 0);
257 if (!x
|| *x
|| errno
)
258 return errno
? -errno
: -EINVAL
;
260 if ((long) (int) l
!= l
)
267 int safe_atolu(const char *s
, long unsigned *ret_lu
) {
275 l
= strtoul(s
, &x
, 0);
277 if (!x
|| *x
|| errno
)
278 return errno
? -errno
: -EINVAL
;
284 int safe_atoli(const char *s
, long int *ret_li
) {
292 l
= strtol(s
, &x
, 0);
294 if (!x
|| *x
|| errno
)
295 return errno
? -errno
: -EINVAL
;
301 int safe_atollu(const char *s
, long long unsigned *ret_llu
) {
303 unsigned long long l
;
309 l
= strtoull(s
, &x
, 0);
311 if (!x
|| *x
|| errno
)
312 return errno
? -errno
: -EINVAL
;
318 int safe_atolli(const char *s
, long long int *ret_lli
) {
326 l
= strtoll(s
, &x
, 0);
328 if (!x
|| *x
|| errno
)
329 return errno
? -errno
: -EINVAL
;
335 /* Split a string into words. */
336 char *split(const char *c
, size_t *l
, const char *separator
, char **state
) {
339 current
= *state
? *state
: (char*) c
;
341 if (!*current
|| *c
== 0)
344 current
+= strspn(current
, separator
);
345 *l
= strcspn(current
, separator
);
348 return (char*) current
;
351 /* Split a string into words, but consider strings enclosed in '' and
352 * "" as words even if they include spaces. */
353 char *split_quoted(const char *c
, size_t *l
, char **state
) {
356 current
= *state
? *state
: (char*) c
;
358 if (!*current
|| *c
== 0)
361 current
+= strspn(current
, WHITESPACE
);
363 if (*current
== '\'') {
365 *l
= strcspn(current
, "'");
370 } else if (*current
== '\"') {
372 *l
= strcspn(current
, "\"");
378 *l
= strcspn(current
, WHITESPACE
);
382 /* FIXME: Cannot deal with strings that have spaces AND ticks
385 return (char*) current
;
388 char **split_path_and_make_absolute(const char *p
) {
392 if (!(l
= strv_split(p
, ":")))
395 if (!strv_path_make_absolute_cwd(l
)) {
403 int get_parent_of_pid(pid_t pid
, pid_t
*_ppid
) {
406 char fn
[132], line
[256], *p
;
407 long long unsigned ppid
;
412 assert_se(snprintf(fn
, sizeof(fn
)-1, "/proc/%llu/stat", (unsigned long long) pid
) < (int) (sizeof(fn
)-1));
413 fn
[sizeof(fn
)-1] = 0;
415 if (!(f
= fopen(fn
, "r")))
418 if (!(fgets(line
, sizeof(line
), f
))) {
426 /* Let's skip the pid and comm fields. The latter is enclosed
427 * in () but does not escape any () in its value, so let's
428 * skip over it manually */
430 if (!(p
= strrchr(line
, ')')))
441 if ((long long unsigned) (pid_t
) ppid
!= ppid
)
444 *_ppid
= (pid_t
) ppid
;
449 int write_one_line_file(const char *fn
, const char *line
) {
456 if (!(f
= fopen(fn
, "we")))
459 if (fputs(line
, f
) < 0) {
470 int read_one_line_file(const char *fn
, char **line
) {
478 if (!(f
= fopen(fn
, "re")))
481 if (!(fgets(t
, sizeof(t
), f
))) {
486 if (!(c
= strdup(t
))) {
499 char *truncate_nl(char *s
) {
502 s
[strcspn(s
, NEWLINE
)] = 0;
506 int get_process_name(pid_t pid
, char **name
) {
513 if (asprintf(&p
, "/proc/%llu/comm", (unsigned long long) pid
) < 0)
516 r
= read_one_line_file(p
, name
);
526 char *strappend(const char *s
, const char *suffix
) {
536 if (!(r
= new(char, a
+b
+1)))
540 memcpy(r
+a
, suffix
, b
);
546 int readlink_malloc(const char *p
, char **r
) {
556 if (!(c
= new(char, l
)))
559 if ((n
= readlink(p
, c
, l
-1)) < 0) {
565 if ((size_t) n
< l
-1) {
576 char *file_name_from_path(const char *p
) {
581 if ((r
= strrchr(p
, '/')))
587 bool path_is_absolute(const char *p
) {
593 bool is_path(const char *p
) {
595 return !!strchr(p
, '/');
598 char *path_make_absolute(const char *p
, const char *prefix
) {
603 /* Makes every item in the list an absolute path by prepending
604 * the prefix, if specified and necessary */
606 if (path_is_absolute(p
) || !prefix
)
609 if (asprintf(&r
, "%s/%s", prefix
, p
) < 0)
615 char *path_make_absolute_cwd(const char *p
) {
620 /* Similar to path_make_absolute(), but prefixes with the
621 * current working directory. */
623 if (path_is_absolute(p
))
626 if (!(cwd
= get_current_dir_name()))
629 r
= path_make_absolute(p
, cwd
);
635 char **strv_path_make_absolute_cwd(char **l
) {
638 /* Goes through every item in the string list and makes it
639 * absolute. This works in place and won't rollback any
640 * changes on failure. */
645 if (!(t
= path_make_absolute_cwd(*s
)))
655 int reset_all_signal_handlers(void) {
658 for (sig
= 1; sig
< _NSIG
; sig
++) {
661 if (sig
== SIGKILL
|| sig
== SIGSTOP
)
665 sa
.sa_handler
= SIG_DFL
;
666 sa
.sa_flags
= SA_RESTART
;
668 /* On Linux the first two RT signals are reserved by
669 * glibc, and sigaction() will return EINVAL for them. */
670 if ((sigaction(sig
, &sa
, NULL
) < 0))
678 char *strstrip(char *s
) {
681 /* Drops trailing whitespace. Modifies the string in
682 * place. Returns pointer to first non-space character */
684 s
+= strspn(s
, WHITESPACE
);
687 if (!strchr(WHITESPACE
, *e
))
698 char *delete_chars(char *s
, const char *bad
) {
701 /* Drops all whitespace, regardless where in the string */
703 for (f
= s
, t
= s
; *f
; f
++) {
715 char *file_in_same_dir(const char *path
, const char *filename
) {
722 /* This removes the last component of path and appends
723 * filename, unless the latter is absolute anyway or the
726 if (path_is_absolute(filename
))
727 return strdup(filename
);
729 if (!(e
= strrchr(path
, '/')))
730 return strdup(filename
);
732 k
= strlen(filename
);
733 if (!(r
= new(char, e
-path
+1+k
+1)))
736 memcpy(r
, path
, e
-path
+1);
737 memcpy(r
+(e
-path
)+1, filename
, k
+1);
742 int mkdir_parents(const char *path
, mode_t mode
) {
747 /* Creates every parent directory in the path except the last
750 p
= path
+ strspn(path
, "/");
755 e
= p
+ strcspn(p
, "/");
756 p
= e
+ strspn(e
, "/");
758 /* Is this the last component? If so, then we're
763 if (!(t
= strndup(path
, e
- path
)))
770 if (r
< 0 && errno
!= EEXIST
)
775 int mkdir_p(const char *path
, mode_t mode
) {
780 if ((r
= mkdir_parents(path
, mode
)) < 0)
783 if (mkdir(path
, mode
) < 0)
789 char hexchar(int x
) {
790 static const char table
[16] = "0123456789abcdef";
792 return table
[x
& 15];
795 int unhexchar(char c
) {
797 if (c
>= '0' && c
<= '9')
800 if (c
>= 'a' && c
<= 'f')
803 if (c
>= 'A' && c
<= 'F')
809 char octchar(int x
) {
810 return '0' + (x
& 7);
813 int unoctchar(char c
) {
815 if (c
>= '0' && c
<= '7')
821 char decchar(int x
) {
822 return '0' + (x
% 10);
825 int undecchar(char c
) {
827 if (c
>= '0' && c
<= '9')
833 char *cescape(const char *s
) {
839 /* Does C style string escaping. */
841 if (!(r
= new(char, strlen(s
)*4 + 1)))
844 for (f
= s
, t
= r
; *f
; f
++)
890 /* For special chars we prefer octal over
891 * hexadecimal encoding, simply because glib's
892 * g_strescape() does the same */
893 if ((*f
< ' ') || (*f
>= 127)) {
895 *(t
++) = octchar((unsigned char) *f
>> 6);
896 *(t
++) = octchar((unsigned char) *f
>> 3);
897 *(t
++) = octchar((unsigned char) *f
);
908 char *cunescape(const char *s
) {
914 /* Undoes C style string escaping */
916 if (!(r
= new(char, strlen(s
)+1)))
919 for (f
= s
, t
= r
; *f
; f
++) {
962 /* hexadecimal encoding */
965 if ((a
= unhexchar(f
[1])) < 0 ||
966 (b
= unhexchar(f
[2])) < 0) {
967 /* Invalid escape code, let's take it literal then */
971 *(t
++) = (char) ((a
<< 4) | b
);
989 if ((a
= unoctchar(f
[0])) < 0 ||
990 (b
= unoctchar(f
[1])) < 0 ||
991 (c
= unoctchar(f
[2])) < 0) {
992 /* Invalid escape code, let's take it literal then */
996 *(t
++) = (char) ((a
<< 6) | (b
<< 3) | c
);
1004 /* premature end of string.*/
1009 /* Invalid escape code, let's take it literal then */
1022 char *xescape(const char *s
, const char *bad
) {
1026 /* Escapes all chars in bad, in addition to \ and all special
1027 * chars, in \xFF style escaping. May be reversed with
1030 if (!(r
= new(char, strlen(s
)*4+1)))
1033 for (f
= s
, t
= r
; *f
; f
++) {
1035 if ((*f
< ' ') || (*f
>= 127) ||
1036 (*f
== '\\') || strchr(bad
, *f
)) {
1039 *(t
++) = hexchar(*f
>> 4);
1040 *(t
++) = hexchar(*f
);
1050 char *bus_path_escape(const char *s
) {
1056 /* Escapes all chars that D-Bus' object path cannot deal
1057 * with. Can be reverse with bus_path_unescape() */
1059 if (!(r
= new(char, strlen(s
)*3+1)))
1062 for (f
= s
, t
= r
; *f
; f
++) {
1064 if (!(*f
>= 'A' && *f
<= 'Z') &&
1065 !(*f
>= 'a' && *f
<= 'z') &&
1066 !(*f
>= '0' && *f
<= '9')) {
1068 *(t
++) = hexchar(*f
>> 4);
1069 *(t
++) = hexchar(*f
);
1079 char *bus_path_unescape(const char *f
) {
1084 if (!(r
= strdup(f
)))
1087 for (t
= r
; *f
; f
++) {
1092 if ((a
= unhexchar(f
[1])) < 0 ||
1093 (b
= unhexchar(f
[2])) < 0) {
1094 /* Invalid escape code, let's take it literal then */
1097 *(t
++) = (char) ((a
<< 4) | b
);
1109 char *path_kill_slashes(char *path
) {
1113 /* Removes redundant inner and trailing slashes. Modifies the
1114 * passed string in-place.
1116 * ///foo///bar/ becomes /foo/bar
1119 for (f
= path
, t
= path
; *f
; f
++) {
1134 /* Special rule, if we are talking of the root directory, a
1135 trailing slash is good */
1137 if (t
== path
&& slash
)
1144 bool path_startswith(const char *path
, const char *prefix
) {
1148 if ((path
[0] == '/') != (prefix
[0] == '/'))
1154 path
+= strspn(path
, "/");
1155 prefix
+= strspn(prefix
, "/");
1163 a
= strcspn(path
, "/");
1164 b
= strcspn(prefix
, "/");
1169 if (memcmp(path
, prefix
, a
) != 0)
1177 bool path_equal(const char *a
, const char *b
) {
1181 if ((a
[0] == '/') != (b
[0] == '/'))
1187 a
+= strspn(a
, "/");
1188 b
+= strspn(b
, "/");
1190 if (*a
== 0 && *b
== 0)
1193 if (*a
== 0 || *b
== 0)
1196 j
= strcspn(a
, "/");
1197 k
= strcspn(b
, "/");
1202 if (memcmp(a
, b
, j
) != 0)
1210 char *ascii_strlower(char *t
) {
1215 for (p
= t
; *p
; p
++)
1216 if (*p
>= 'A' && *p
<= 'Z')
1217 *p
= *p
- 'A' + 'a';
1222 bool ignore_file(const char *filename
) {
1226 filename
[0] == '.' ||
1227 streq(filename
, "lost+found") ||
1228 endswith(filename
, "~") ||
1229 endswith(filename
, ".rpmnew") ||
1230 endswith(filename
, ".rpmsave") ||
1231 endswith(filename
, ".rpmorig") ||
1232 endswith(filename
, ".dpkg-old") ||
1233 endswith(filename
, ".dpkg-new") ||
1234 endswith(filename
, ".swp");
1237 int fd_nonblock(int fd
, bool nonblock
) {
1242 if ((flags
= fcntl(fd
, F_GETFL
, 0)) < 0)
1246 flags
|= O_NONBLOCK
;
1248 flags
&= ~O_NONBLOCK
;
1250 if (fcntl(fd
, F_SETFL
, flags
) < 0)
1256 int fd_cloexec(int fd
, bool cloexec
) {
1261 if ((flags
= fcntl(fd
, F_GETFD
, 0)) < 0)
1265 flags
|= FD_CLOEXEC
;
1267 flags
&= ~FD_CLOEXEC
;
1269 if (fcntl(fd
, F_SETFD
, flags
) < 0)
1275 int close_all_fds(const int except
[], unsigned n_except
) {
1280 if (!(d
= opendir("/proc/self/fd")))
1283 while ((de
= readdir(d
))) {
1286 if (ignore_file(de
->d_name
))
1289 if ((r
= safe_atoi(de
->d_name
, &fd
)) < 0)
1303 for (i
= 0; i
< n_except
; i
++)
1304 if (except
[i
] == fd
) {
1313 if ((r
= close_nointr(fd
)) < 0) {
1314 /* Valgrind has its own FD and doesn't want to have it closed */
1327 bool chars_intersect(const char *a
, const char *b
) {
1330 /* Returns true if any of the chars in a are in b. */
1331 for (p
= a
; *p
; p
++)
1338 char *format_timestamp(char *buf
, size_t l
, usec_t t
) {
1348 sec
= (time_t) t
/ USEC_PER_SEC
;
1350 if (strftime(buf
, l
, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec
, &tm
)) <= 0)
1356 bool fstype_is_network(const char *fstype
) {
1357 static const char * const table
[] = {
1367 for (i
= 0; i
< ELEMENTSOF(table
); i
++)
1368 if (streq(table
[i
], fstype
))
1377 if ((fd
= open("/dev/tty0", O_RDWR
|O_NOCTTY
|O_CLOEXEC
)) < 0)
1382 TIOCL_GETKMSGREDIRECT
,
1386 if (ioctl(fd
, TIOCLINUX
, tiocl
) < 0)
1389 vt
= tiocl
[0] <= 0 ? 1 : tiocl
[0];
1392 if (ioctl(fd
, VT_ACTIVATE
, vt
) < 0)
1395 close_nointr_nofail(r
);
1399 int read_one_char(FILE *f
, char *ret
, bool *need_nl
) {
1400 struct termios old_termios
, new_termios
;
1407 if (tcgetattr(fileno(f
), &old_termios
) >= 0) {
1408 new_termios
= old_termios
;
1410 new_termios
.c_lflag
&= ~ICANON
;
1411 new_termios
.c_cc
[VMIN
] = 1;
1412 new_termios
.c_cc
[VTIME
] = 0;
1414 if (tcsetattr(fileno(f
), TCSADRAIN
, &new_termios
) >= 0) {
1417 k
= fread(&c
, 1, 1, f
);
1419 tcsetattr(fileno(f
), TCSADRAIN
, &old_termios
);
1425 *need_nl
= c
!= '\n';
1432 if (!(fgets(line
, sizeof(line
), f
)))
1437 if (strlen(line
) != 1)
1447 int ask(char *ret
, const char *replies
, const char *text
, ...) {
1456 bool need_nl
= true;
1458 fputs("\x1B[1m", stdout
);
1464 fputs("\x1B[0m", stdout
);
1468 if ((r
= read_one_char(stdin
, &c
, &need_nl
)) < 0) {
1470 if (r
== -EBADMSG
) {
1471 puts("Bad input, please try again.");
1482 if (strchr(replies
, c
)) {
1487 puts("Read unexpected character, please try again.");
1491 int reset_terminal(int fd
) {
1492 struct termios termios
;
1497 /* Set terminal to some sane defaults */
1499 if (tcgetattr(fd
, &termios
) < 0) {
1504 /* We only reset the stuff that matters to the software. How
1505 * hardware is set up we don't touch assuming that somebody
1506 * else will do that for us */
1508 termios
.c_iflag
&= ~(IGNBRK
| BRKINT
| ISTRIP
| INLCR
| IGNCR
| IUCLC
);
1509 termios
.c_iflag
|= ICRNL
| IMAXBEL
| IUTF8
;
1510 termios
.c_oflag
|= ONLCR
;
1511 termios
.c_cflag
|= CREAD
;
1512 termios
.c_lflag
= ISIG
| ICANON
| IEXTEN
| ECHO
| ECHOE
| ECHOK
| ECHOCTL
| ECHOPRT
| ECHOKE
;
1514 termios
.c_cc
[VINTR
] = 03; /* ^C */
1515 termios
.c_cc
[VQUIT
] = 034; /* ^\ */
1516 termios
.c_cc
[VERASE
] = 0177;
1517 termios
.c_cc
[VKILL
] = 025; /* ^X */
1518 termios
.c_cc
[VEOF
] = 04; /* ^D */
1519 termios
.c_cc
[VSTART
] = 021; /* ^Q */
1520 termios
.c_cc
[VSTOP
] = 023; /* ^S */
1521 termios
.c_cc
[VSUSP
] = 032; /* ^Z */
1522 termios
.c_cc
[VLNEXT
] = 026; /* ^V */
1523 termios
.c_cc
[VWERASE
] = 027; /* ^W */
1524 termios
.c_cc
[VREPRINT
] = 022; /* ^R */
1525 termios
.c_cc
[VEOL
] = 0;
1526 termios
.c_cc
[VEOL2
] = 0;
1528 termios
.c_cc
[VTIME
] = 0;
1529 termios
.c_cc
[VMIN
] = 1;
1531 if (tcsetattr(fd
, TCSANOW
, &termios
) < 0)
1535 /* Just in case, flush all crap out */
1536 tcflush(fd
, TCIOFLUSH
);
1541 int open_terminal(const char *name
, int mode
) {
1544 if ((fd
= open(name
, mode
)) < 0)
1547 if ((r
= isatty(fd
)) < 0) {
1548 close_nointr_nofail(fd
);
1553 close_nointr_nofail(fd
);
1560 int flush_fd(int fd
) {
1561 struct pollfd pollfd
;
1565 pollfd
.events
= POLLIN
;
1572 if ((r
= poll(&pollfd
, 1, 0)) < 0) {
1583 if ((l
= read(fd
, buf
, sizeof(buf
))) < 0) {
1588 if (errno
== EAGAIN
)
1599 int acquire_terminal(const char *name
, bool fail
, bool force
) {
1600 int fd
= -1, notify
= -1, r
, wd
= -1;
1604 /* We use inotify to be notified when the tty is closed. We
1605 * create the watch before checking if we can actually acquire
1606 * it, so that we don't lose any event.
1608 * Note: strictly speaking this actually watches for the
1609 * device being closed, it does *not* really watch whether a
1610 * tty loses its controlling process. However, unless some
1611 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
1612 * its tty otherwise this will not become a problem. As long
1613 * as the administrator makes sure not configure any service
1614 * on the same tty as an untrusted user this should not be a
1615 * problem. (Which he probably should not do anyway.) */
1617 if (!fail
&& !force
) {
1618 if ((notify
= inotify_init1(IN_CLOEXEC
)) < 0) {
1623 if ((wd
= inotify_add_watch(notify
, name
, IN_CLOSE
)) < 0) {
1630 if ((r
= flush_fd(notify
)) < 0)
1633 /* We pass here O_NOCTTY only so that we can check the return
1634 * value TIOCSCTTY and have a reliable way to figure out if we
1635 * successfully became the controlling process of the tty */
1636 if ((fd
= open_terminal(name
, O_RDWR
|O_NOCTTY
)) < 0)
1639 /* First, try to get the tty */
1640 if ((r
= ioctl(fd
, TIOCSCTTY
, force
)) < 0 &&
1641 (force
|| fail
|| errno
!= EPERM
)) {
1651 assert(notify
>= 0);
1654 struct inotify_event e
;
1657 if ((l
= read(notify
, &e
, sizeof(e
))) != sizeof(e
)) {
1671 if (e
.wd
!= wd
|| !(e
.mask
& IN_CLOSE
)) {
1679 /* We close the tty fd here since if the old session
1680 * ended our handle will be dead. It's important that
1681 * we do this after sleeping, so that we don't enter
1682 * an endless loop. */
1683 close_nointr_nofail(fd
);
1687 close_nointr_nofail(notify
);
1689 if ((r
= reset_terminal(fd
)) < 0)
1690 log_warning("Failed to reset terminal: %s", strerror(-r
));
1696 close_nointr_nofail(fd
);
1699 close_nointr_nofail(notify
);
1704 int release_terminal(void) {
1706 struct sigaction sa_old
, sa_new
;
1708 if ((fd
= open("/dev/tty", O_RDWR
|O_NOCTTY
|O_NDELAY
)) < 0)
1711 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
1712 * by our own TIOCNOTTY */
1715 sa_new
.sa_handler
= SIG_IGN
;
1716 sa_new
.sa_flags
= SA_RESTART
;
1717 assert_se(sigaction(SIGHUP
, &sa_new
, &sa_old
) == 0);
1719 if (ioctl(fd
, TIOCNOTTY
) < 0)
1722 assert_se(sigaction(SIGHUP
, &sa_old
, NULL
) == 0);
1724 close_nointr_nofail(fd
);
1728 int ignore_signal(int sig
) {
1729 struct sigaction sa
;
1732 sa
.sa_handler
= SIG_IGN
;
1733 sa
.sa_flags
= SA_RESTART
;
1735 return sigaction(sig
, &sa
, NULL
);
1738 int close_pipe(int p
[]) {
1744 a
= close_nointr(p
[0]);
1749 b
= close_nointr(p
[1]);
1753 return a
< 0 ? a
: b
;
1756 ssize_t
loop_read(int fd
, void *buf
, size_t nbytes
) {
1765 while (nbytes
> 0) {
1768 if ((k
= read(fd
, p
, nbytes
)) <= 0) {
1773 if (errno
== EAGAIN
) {
1774 struct pollfd pollfd
;
1778 pollfd
.events
= POLLIN
;
1780 if (poll(&pollfd
, 1, -1) < 0) {
1784 return n
> 0 ? n
: -errno
;
1787 if (pollfd
.revents
!= POLLIN
)
1788 return n
> 0 ? n
: -EIO
;
1793 return n
> 0 ? n
: (k
< 0 ? -errno
: 0);
1804 int path_is_mount_point(const char *t
) {
1808 if (lstat(t
, &a
) < 0) {
1810 if (errno
== ENOENT
)
1816 if (!(copy
= strdup(t
)))
1819 if (lstat(dirname(copy
), &b
) < 0) {
1826 return a
.st_dev
!= b
.st_dev
;
1829 int parse_usec(const char *t
, usec_t
*usec
) {
1830 static const struct {
1834 { "sec", USEC_PER_SEC
},
1835 { "s", USEC_PER_SEC
},
1836 { "min", USEC_PER_MINUTE
},
1837 { "hr", USEC_PER_HOUR
},
1838 { "h", USEC_PER_HOUR
},
1839 { "d", USEC_PER_DAY
},
1840 { "w", USEC_PER_WEEK
},
1841 { "msec", USEC_PER_MSEC
},
1842 { "ms", USEC_PER_MSEC
},
1843 { "m", USEC_PER_MINUTE
},
1846 { "", USEC_PER_SEC
},
1862 l
= strtoll(p
, &e
, 10);
1873 e
+= strspn(e
, WHITESPACE
);
1875 for (i
= 0; i
< ELEMENTSOF(table
); i
++)
1876 if (startswith(e
, table
[i
].suffix
)) {
1877 r
+= (usec_t
) l
* table
[i
].usec
;
1878 p
= e
+ strlen(table
[i
].suffix
);
1882 if (i
>= ELEMENTSOF(table
))
1892 static const char *const ioprio_class_table
[] = {
1893 [IOPRIO_CLASS_NONE
] = "none",
1894 [IOPRIO_CLASS_RT
] = "realtime",
1895 [IOPRIO_CLASS_BE
] = "best-effort",
1896 [IOPRIO_CLASS_IDLE
] = "idle"
1899 DEFINE_STRING_TABLE_LOOKUP(ioprio_class
, int);
1901 static const char *const sigchld_code_table
[] = {
1902 [CLD_EXITED
] = "exited",
1903 [CLD_KILLED
] = "killed",
1904 [CLD_DUMPED
] = "dumped",
1905 [CLD_TRAPPED
] = "trapped",
1906 [CLD_STOPPED
] = "stopped",
1907 [CLD_CONTINUED
] = "continued",
1910 DEFINE_STRING_TABLE_LOOKUP(sigchld_code
, int);
1912 static const char *const log_facility_table
[LOG_NFACILITIES
] = {
1913 [LOG_FAC(LOG_KERN
)] = "kern",
1914 [LOG_FAC(LOG_USER
)] = "user",
1915 [LOG_FAC(LOG_MAIL
)] = "mail",
1916 [LOG_FAC(LOG_DAEMON
)] = "daemon",
1917 [LOG_FAC(LOG_AUTH
)] = "auth",
1918 [LOG_FAC(LOG_SYSLOG
)] = "syslog",
1919 [LOG_FAC(LOG_LPR
)] = "lpr",
1920 [LOG_FAC(LOG_NEWS
)] = "news",
1921 [LOG_FAC(LOG_UUCP
)] = "uucp",
1922 [LOG_FAC(LOG_CRON
)] = "cron",
1923 [LOG_FAC(LOG_AUTHPRIV
)] = "authpriv",
1924 [LOG_FAC(LOG_FTP
)] = "ftp",
1925 [LOG_FAC(LOG_LOCAL0
)] = "local0",
1926 [LOG_FAC(LOG_LOCAL1
)] = "local1",
1927 [LOG_FAC(LOG_LOCAL2
)] = "local2",
1928 [LOG_FAC(LOG_LOCAL3
)] = "local3",
1929 [LOG_FAC(LOG_LOCAL4
)] = "local4",
1930 [LOG_FAC(LOG_LOCAL5
)] = "local5",
1931 [LOG_FAC(LOG_LOCAL6
)] = "local6",
1932 [LOG_FAC(LOG_LOCAL7
)] = "local7"
1935 DEFINE_STRING_TABLE_LOOKUP(log_facility
, int);
1937 static const char *const log_level_table
[] = {
1938 [LOG_EMERG
] = "emerg",
1939 [LOG_ALERT
] = "alert",
1940 [LOG_CRIT
] = "crit",
1942 [LOG_WARNING
] = "warning",
1943 [LOG_NOTICE
] = "notice",
1944 [LOG_INFO
] = "info",
1945 [LOG_DEBUG
] = "debug"
1948 DEFINE_STRING_TABLE_LOOKUP(log_level
, int);
1950 static const char* const sched_policy_table
[] = {
1951 [SCHED_OTHER
] = "other",
1952 [SCHED_BATCH
] = "batch",
1953 [SCHED_IDLE
] = "idle",
1954 [SCHED_FIFO
] = "fifo",
1958 DEFINE_STRING_TABLE_LOOKUP(sched_policy
, int);
1960 static const char* const rlimit_table
[] = {
1961 [RLIMIT_CPU
] = "LimitCPU",
1962 [RLIMIT_FSIZE
] = "LimitFSIZE",
1963 [RLIMIT_DATA
] = "LimitDATA",
1964 [RLIMIT_STACK
] = "LimitSTACK",
1965 [RLIMIT_CORE
] = "LimitCORE",
1966 [RLIMIT_RSS
] = "LimitRSS",
1967 [RLIMIT_NOFILE
] = "LimitNOFILE",
1968 [RLIMIT_AS
] = "LimitAS",
1969 [RLIMIT_NPROC
] = "LimitNPROC",
1970 [RLIMIT_MEMLOCK
] = "LimitMEMLOCK",
1971 [RLIMIT_LOCKS
] = "LimitLOCKS",
1972 [RLIMIT_SIGPENDING
] = "LimitSIGPENDING",
1973 [RLIMIT_MSGQUEUE
] = "LimitMSGQUEUE",
1974 [RLIMIT_NICE
] = "LimitNICE",
1975 [RLIMIT_RTPRIO
] = "LimitRTPRIO",
1976 [RLIMIT_RTTIME
] = "LimitRTTIME"
1979 DEFINE_STRING_TABLE_LOOKUP(rlimit
, int);