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Commit | Line | Data |
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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
abbbea81 LP |
2 | |
3 | /*** | |
0ebee881 KS |
4 | This file is part of systemd. |
5 | ||
abbbea81 LP |
6 | Copyright 2010 Lennart Poettering |
7 | ||
0ebee881 KS |
8 | systemd is free software; you can redistribute it and/or modify it |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
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 | Lesser General Public License for more details. | |
abbbea81 | 17 | |
0ebee881 KS |
18 | You should have received a copy of the GNU Lesser General Public License |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
8c47c732 | 21 | |
abbbea81 | 22 | #include <errno.h> |
916abb21 | 23 | #include <limits.h> |
0ebee881 | 24 | #include <mqueue.h> |
8dd4c05b LP |
25 | #include <netinet/in.h> |
26 | #include <stdarg.h> | |
27 | #include <stddef.h> | |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <sys/socket.h> | |
32 | #include <sys/stat.h> | |
33 | #include <sys/un.h> | |
34 | #include <unistd.h> | |
abbbea81 | 35 | |
07630cea LP |
36 | #include "sd-daemon.h" |
37 | ||
3ffd4af2 | 38 | #include "fd-util.h" |
6bedfcbb | 39 | #include "parse-util.h" |
be8f4e9e | 40 | #include "path-util.h" |
3cb46740 | 41 | #include "socket-util.h" |
8dd4c05b LP |
42 | #include "strv.h" |
43 | #include "util.h" | |
44 | ||
8dd4c05b LP |
45 | static void unsetenv_all(bool unset_environment) { |
46 | ||
47 | if (!unset_environment) | |
48 | return; | |
49 | ||
50 | unsetenv("LISTEN_PID"); | |
51 | unsetenv("LISTEN_FDS"); | |
52 | unsetenv("LISTEN_FDNAMES"); | |
53 | } | |
54 | ||
0ebee881 | 55 | _public_ int sd_listen_fds(int unset_environment) { |
abbbea81 | 56 | const char *e; |
be8f4e9e LP |
57 | unsigned n; |
58 | int r, fd; | |
59 | pid_t pid; | |
abbbea81 | 60 | |
50425d16 MS |
61 | e = getenv("LISTEN_PID"); |
62 | if (!e) { | |
abbbea81 LP |
63 | r = 0; |
64 | goto finish; | |
65 | } | |
66 | ||
be8f4e9e LP |
67 | r = parse_pid(e, &pid); |
68 | if (r < 0) | |
abbbea81 | 69 | goto finish; |
abbbea81 LP |
70 | |
71 | /* Is this for us? */ | |
be8f4e9e | 72 | if (getpid() != pid) { |
abbbea81 LP |
73 | r = 0; |
74 | goto finish; | |
75 | } | |
76 | ||
50425d16 MS |
77 | e = getenv("LISTEN_FDS"); |
78 | if (!e) { | |
abbbea81 LP |
79 | r = 0; |
80 | goto finish; | |
81 | } | |
82 | ||
be8f4e9e LP |
83 | r = safe_atou(e, &n); |
84 | if (r < 0) | |
abbbea81 | 85 | goto finish; |
8640e111 | 86 | |
be8f4e9e LP |
87 | for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) n; fd ++) { |
88 | r = fd_cloexec(fd, true); | |
89 | if (r < 0) | |
8640e111 | 90 | goto finish; |
8640e111 LP |
91 | } |
92 | ||
be8f4e9e | 93 | r = (int) n; |
abbbea81 LP |
94 | |
95 | finish: | |
8dd4c05b LP |
96 | unsetenv_all(unset_environment); |
97 | return r; | |
98 | } | |
99 | ||
100 | _public_ int sd_listen_fds_with_names(int unset_environment, char ***names) { | |
101 | _cleanup_strv_free_ char **l = NULL; | |
102 | bool have_names; | |
103 | int n_names = 0, n_fds; | |
104 | const char *e; | |
105 | int r; | |
106 | ||
107 | if (!names) | |
108 | return sd_listen_fds(unset_environment); | |
109 | ||
110 | e = getenv("LISTEN_FDNAMES"); | |
111 | if (e) { | |
112 | n_names = strv_split_extract(&l, e, ":", EXTRACT_DONT_COALESCE_SEPARATORS); | |
113 | if (n_names < 0) { | |
114 | unsetenv_all(unset_environment); | |
115 | return n_names; | |
116 | } | |
117 | ||
118 | have_names = true; | |
119 | } else | |
120 | have_names = false; | |
121 | ||
122 | n_fds = sd_listen_fds(unset_environment); | |
123 | if (n_fds <= 0) | |
124 | return n_fds; | |
125 | ||
126 | if (have_names) { | |
127 | if (n_names != n_fds) | |
128 | return -EINVAL; | |
129 | } else { | |
130 | r = strv_extend_n(&l, "unknown", n_fds); | |
131 | if (r < 0) | |
132 | return r; | |
abbbea81 LP |
133 | } |
134 | ||
8dd4c05b LP |
135 | *names = l; |
136 | l = NULL; | |
137 | ||
138 | return n_fds; | |
abbbea81 | 139 | } |
7c394faa | 140 | |
0ebee881 | 141 | _public_ int sd_is_fifo(int fd, const char *path) { |
7c394faa LP |
142 | struct stat st_fd; |
143 | ||
e6803801 | 144 | assert_return(fd >= 0, -EBADF); |
7c394faa | 145 | |
7c394faa LP |
146 | if (fstat(fd, &st_fd) < 0) |
147 | return -errno; | |
148 | ||
149 | if (!S_ISFIFO(st_fd.st_mode)) | |
150 | return 0; | |
151 | ||
152 | if (path) { | |
153 | struct stat st_path; | |
154 | ||
fd8bccfb | 155 | if (stat(path, &st_path) < 0) { |
7c394faa LP |
156 | |
157 | if (errno == ENOENT || errno == ENOTDIR) | |
158 | return 0; | |
159 | ||
160 | return -errno; | |
161 | } | |
162 | ||
163 | return | |
164 | st_path.st_dev == st_fd.st_dev && | |
165 | st_path.st_ino == st_fd.st_ino; | |
166 | } | |
167 | ||
168 | return 1; | |
169 | } | |
170 | ||
0ebee881 | 171 | _public_ int sd_is_special(int fd, const char *path) { |
4160ec67 WD |
172 | struct stat st_fd; |
173 | ||
e6803801 | 174 | assert_return(fd >= 0, -EBADF); |
4160ec67 WD |
175 | |
176 | if (fstat(fd, &st_fd) < 0) | |
177 | return -errno; | |
178 | ||
179 | if (!S_ISREG(st_fd.st_mode) && !S_ISCHR(st_fd.st_mode)) | |
180 | return 0; | |
181 | ||
182 | if (path) { | |
183 | struct stat st_path; | |
184 | ||
185 | if (stat(path, &st_path) < 0) { | |
186 | ||
187 | if (errno == ENOENT || errno == ENOTDIR) | |
188 | return 0; | |
189 | ||
190 | return -errno; | |
191 | } | |
192 | ||
193 | if (S_ISREG(st_fd.st_mode) && S_ISREG(st_path.st_mode)) | |
194 | return | |
195 | st_path.st_dev == st_fd.st_dev && | |
196 | st_path.st_ino == st_fd.st_ino; | |
197 | else if (S_ISCHR(st_fd.st_mode) && S_ISCHR(st_path.st_mode)) | |
198 | return st_path.st_rdev == st_fd.st_rdev; | |
199 | else | |
200 | return 0; | |
201 | } | |
202 | ||
203 | return 1; | |
204 | } | |
205 | ||
e6a3081a | 206 | static int sd_is_socket_internal(int fd, int type, int listening) { |
7c394faa LP |
207 | struct stat st_fd; |
208 | ||
e6803801 | 209 | assert_return(fd >= 0, -EBADF); |
be8f4e9e | 210 | assert_return(type >= 0, -EINVAL); |
7c394faa LP |
211 | |
212 | if (fstat(fd, &st_fd) < 0) | |
213 | return -errno; | |
214 | ||
215 | if (!S_ISSOCK(st_fd.st_mode)) | |
216 | return 0; | |
217 | ||
218 | if (type != 0) { | |
219 | int other_type = 0; | |
220 | socklen_t l = sizeof(other_type); | |
221 | ||
222 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &other_type, &l) < 0) | |
223 | return -errno; | |
224 | ||
225 | if (l != sizeof(other_type)) | |
226 | return -EINVAL; | |
227 | ||
228 | if (other_type != type) | |
229 | return 0; | |
230 | } | |
231 | ||
232 | if (listening >= 0) { | |
233 | int accepting = 0; | |
234 | socklen_t l = sizeof(accepting); | |
235 | ||
236 | if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &accepting, &l) < 0) | |
237 | return -errno; | |
238 | ||
239 | if (l != sizeof(accepting)) | |
240 | return -EINVAL; | |
241 | ||
dde770cf | 242 | if (!accepting != !listening) |
7c394faa LP |
243 | return 0; |
244 | } | |
245 | ||
246 | return 1; | |
247 | } | |
248 | ||
0ebee881 | 249 | _public_ int sd_is_socket(int fd, int family, int type, int listening) { |
88ce42f6 LP |
250 | int r; |
251 | ||
e6803801 | 252 | assert_return(fd >= 0, -EBADF); |
be8f4e9e | 253 | assert_return(family >= 0, -EINVAL); |
88ce42f6 | 254 | |
50425d16 MS |
255 | r = sd_is_socket_internal(fd, type, listening); |
256 | if (r <= 0) | |
88ce42f6 LP |
257 | return r; |
258 | ||
259 | if (family > 0) { | |
1c633045 ZJS |
260 | union sockaddr_union sockaddr = {}; |
261 | socklen_t l = sizeof(sockaddr); | |
88ce42f6 LP |
262 | |
263 | if (getsockname(fd, &sockaddr.sa, &l) < 0) | |
264 | return -errno; | |
265 | ||
b7f42664 | 266 | if (l < sizeof(sa_family_t)) |
88ce42f6 LP |
267 | return -EINVAL; |
268 | ||
269 | return sockaddr.sa.sa_family == family; | |
270 | } | |
271 | ||
272 | return 1; | |
273 | } | |
274 | ||
0ebee881 | 275 | _public_ int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) { |
1c633045 ZJS |
276 | union sockaddr_union sockaddr = {}; |
277 | socklen_t l = sizeof(sockaddr); | |
7c394faa LP |
278 | int r; |
279 | ||
e6803801 | 280 | assert_return(fd >= 0, -EBADF); |
be8f4e9e | 281 | assert_return(IN_SET(family, 0, AF_INET, AF_INET6), -EINVAL); |
88ce42f6 | 282 | |
50425d16 MS |
283 | r = sd_is_socket_internal(fd, type, listening); |
284 | if (r <= 0) | |
7c394faa LP |
285 | return r; |
286 | ||
7c394faa LP |
287 | if (getsockname(fd, &sockaddr.sa, &l) < 0) |
288 | return -errno; | |
289 | ||
b7f42664 | 290 | if (l < sizeof(sa_family_t)) |
7c394faa LP |
291 | return -EINVAL; |
292 | ||
293 | if (sockaddr.sa.sa_family != AF_INET && | |
294 | sockaddr.sa.sa_family != AF_INET6) | |
295 | return 0; | |
296 | ||
be8f4e9e | 297 | if (family != 0) |
88ce42f6 LP |
298 | if (sockaddr.sa.sa_family != family) |
299 | return 0; | |
300 | ||
7c394faa LP |
301 | if (port > 0) { |
302 | if (sockaddr.sa.sa_family == AF_INET) { | |
303 | if (l < sizeof(struct sockaddr_in)) | |
304 | return -EINVAL; | |
305 | ||
3cb46740 | 306 | return htons(port) == sockaddr.in.sin_port; |
7c394faa LP |
307 | } else { |
308 | if (l < sizeof(struct sockaddr_in6)) | |
309 | return -EINVAL; | |
310 | ||
311 | return htons(port) == sockaddr.in6.sin6_port; | |
312 | } | |
313 | } | |
314 | ||
315 | return 1; | |
316 | } | |
317 | ||
0ebee881 | 318 | _public_ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) { |
1c633045 ZJS |
319 | union sockaddr_union sockaddr = {}; |
320 | socklen_t l = sizeof(sockaddr); | |
7c394faa LP |
321 | int r; |
322 | ||
e6803801 | 323 | assert_return(fd >= 0, -EBADF); |
be8f4e9e | 324 | |
50425d16 MS |
325 | r = sd_is_socket_internal(fd, type, listening); |
326 | if (r <= 0) | |
7c394faa LP |
327 | return r; |
328 | ||
7c394faa LP |
329 | if (getsockname(fd, &sockaddr.sa, &l) < 0) |
330 | return -errno; | |
331 | ||
b7f42664 | 332 | if (l < sizeof(sa_family_t)) |
7c394faa LP |
333 | return -EINVAL; |
334 | ||
335 | if (sockaddr.sa.sa_family != AF_UNIX) | |
336 | return 0; | |
337 | ||
338 | if (path) { | |
d1d7caee | 339 | if (length == 0) |
7c394faa LP |
340 | length = strlen(path); |
341 | ||
d1d7caee | 342 | if (length == 0) |
7c394faa | 343 | /* Unnamed socket */ |
0e098b15 | 344 | return l == offsetof(struct sockaddr_un, sun_path); |
7c394faa | 345 | |
7c394faa LP |
346 | if (path[0]) |
347 | /* Normal path socket */ | |
cd250a39 | 348 | return |
0e098b15 | 349 | (l >= offsetof(struct sockaddr_un, sun_path) + length + 1) && |
cd250a39 | 350 | memcmp(path, sockaddr.un.sun_path, length+1) == 0; |
7c394faa LP |
351 | else |
352 | /* Abstract namespace socket */ | |
cd250a39 | 353 | return |
0e098b15 | 354 | (l == offsetof(struct sockaddr_un, sun_path) + length) && |
cd250a39 | 355 | memcmp(path, sockaddr.un.sun_path, length) == 0; |
7c394faa LP |
356 | } |
357 | ||
358 | return 1; | |
359 | } | |
8c47c732 | 360 | |
0ebee881 | 361 | _public_ int sd_is_mq(int fd, const char *path) { |
916abb21 LP |
362 | struct mq_attr attr; |
363 | ||
0260d1d5 ZJS |
364 | /* Check that the fd is valid */ |
365 | assert_return(fcntl(fd, F_GETFD) >= 0, -errno); | |
916abb21 | 366 | |
0260d1d5 ZJS |
367 | if (mq_getattr(fd, &attr) < 0) { |
368 | if (errno == EBADF) | |
369 | /* A non-mq fd (or an invalid one, but we ruled that out above) */ | |
370 | return 0; | |
916abb21 | 371 | return -errno; |
0260d1d5 | 372 | } |
916abb21 LP |
373 | |
374 | if (path) { | |
375 | char fpath[PATH_MAX]; | |
376 | struct stat a, b; | |
377 | ||
be8f4e9e | 378 | assert_return(path_is_absolute(path), -EINVAL); |
916abb21 LP |
379 | |
380 | if (fstat(fd, &a) < 0) | |
381 | return -errno; | |
382 | ||
383 | strncpy(stpcpy(fpath, "/dev/mqueue"), path, sizeof(fpath) - 12); | |
384 | fpath[sizeof(fpath)-1] = 0; | |
385 | ||
386 | if (stat(fpath, &b) < 0) | |
387 | return -errno; | |
388 | ||
389 | if (a.st_dev != b.st_dev || | |
390 | a.st_ino != b.st_ino) | |
391 | return 0; | |
392 | } | |
393 | ||
394 | return 1; | |
916abb21 LP |
395 | } |
396 | ||
a354329f LP |
397 | _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char *state, const int *fds, unsigned n_fds) { |
398 | union sockaddr_union sockaddr = { | |
399 | .sa.sa_family = AF_UNIX, | |
400 | }; | |
401 | struct iovec iovec = { | |
402 | .iov_base = (char*) state, | |
403 | }; | |
404 | struct msghdr msghdr = { | |
405 | .msg_iov = &iovec, | |
406 | .msg_iovlen = 1, | |
407 | .msg_name = &sockaddr, | |
408 | }; | |
a354329f LP |
409 | _cleanup_close_ int fd = -1; |
410 | struct cmsghdr *cmsg = NULL; | |
411 | const char *e; | |
64144440 | 412 | bool have_pid; |
be8f4e9e | 413 | int r; |
8c47c732 LP |
414 | |
415 | if (!state) { | |
416 | r = -EINVAL; | |
417 | goto finish; | |
418 | } | |
419 | ||
a354329f LP |
420 | if (n_fds > 0 && !fds) { |
421 | r = -EINVAL; | |
422 | goto finish; | |
423 | } | |
424 | ||
50425d16 MS |
425 | e = getenv("NOTIFY_SOCKET"); |
426 | if (!e) | |
08bfb810 | 427 | return 0; |
8c47c732 LP |
428 | |
429 | /* Must be an abstract socket, or an absolute path */ | |
430 | if ((e[0] != '@' && e[0] != '/') || e[1] == 0) { | |
431 | r = -EINVAL; | |
432 | goto finish; | |
433 | } | |
434 | ||
50425d16 MS |
435 | fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0); |
436 | if (fd < 0) { | |
8c47c732 LP |
437 | r = -errno; |
438 | goto finish; | |
439 | } | |
440 | ||
a354329f | 441 | iovec.iov_len = strlen(state); |
8c47c732 | 442 | |
a354329f | 443 | strncpy(sockaddr.un.sun_path, e, sizeof(sockaddr.un.sun_path)); |
8c47c732 LP |
444 | if (sockaddr.un.sun_path[0] == '@') |
445 | sockaddr.un.sun_path[0] = 0; | |
446 | ||
0e098b15 | 447 | msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(e); |
a013bd94 LP |
448 | if (msghdr.msg_namelen > sizeof(struct sockaddr_un)) |
449 | msghdr.msg_namelen = sizeof(struct sockaddr_un); | |
450 | ||
64144440 | 451 | have_pid = pid != 0 && pid != getpid(); |
d4a144fa | 452 | |
64144440 | 453 | if (n_fds > 0 || have_pid) { |
a5bd3c32 | 454 | /* CMSG_SPACE(0) may return value different then zero, which results in miscalculated controllen. */ |
c463a6f1 LP |
455 | msghdr.msg_controllen = |
456 | (n_fds > 0 ? CMSG_SPACE(sizeof(int) * n_fds) : 0) + | |
457 | (have_pid ? CMSG_SPACE(sizeof(struct ucred)) : 0); | |
458 | ||
40f44238 | 459 | msghdr.msg_control = alloca0(msghdr.msg_controllen); |
a354329f LP |
460 | |
461 | cmsg = CMSG_FIRSTHDR(&msghdr); | |
64144440 ZJS |
462 | if (n_fds > 0) { |
463 | cmsg->cmsg_level = SOL_SOCKET; | |
464 | cmsg->cmsg_type = SCM_RIGHTS; | |
465 | cmsg->cmsg_len = CMSG_LEN(sizeof(int) * n_fds); | |
a354329f | 466 | |
64144440 | 467 | memcpy(CMSG_DATA(cmsg), fds, sizeof(int) * n_fds); |
be8f4e9e | 468 | |
64144440 ZJS |
469 | if (have_pid) |
470 | assert_se(cmsg = CMSG_NXTHDR(&msghdr, cmsg)); | |
471 | } | |
a354329f | 472 | |
64144440 ZJS |
473 | if (have_pid) { |
474 | struct ucred *ucred; | |
be8f4e9e | 475 | |
64144440 ZJS |
476 | cmsg->cmsg_level = SOL_SOCKET; |
477 | cmsg->cmsg_type = SCM_CREDENTIALS; | |
478 | cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred)); | |
be8f4e9e | 479 | |
64144440 ZJS |
480 | ucred = (struct ucred*) CMSG_DATA(cmsg); |
481 | ucred->pid = pid; | |
482 | ucred->uid = getuid(); | |
483 | ucred->gid = getgid(); | |
484 | } | |
be8f4e9e LP |
485 | } |
486 | ||
487 | /* First try with fake ucred data, as requested */ | |
488 | if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) >= 0) { | |
489 | r = 1; | |
8c47c732 LP |
490 | goto finish; |
491 | } | |
492 | ||
a354329f | 493 | /* If that failed, try with our own ucred instead */ |
64144440 ZJS |
494 | if (have_pid) { |
495 | msghdr.msg_controllen -= CMSG_SPACE(sizeof(struct ucred)); | |
496 | if (msghdr.msg_controllen == 0) | |
a354329f | 497 | msghdr.msg_control = NULL; |
be8f4e9e LP |
498 | |
499 | if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) >= 0) { | |
500 | r = 1; | |
501 | goto finish; | |
502 | } | |
503 | } | |
504 | ||
505 | r = -errno; | |
8c47c732 LP |
506 | |
507 | finish: | |
508 | if (unset_environment) | |
509 | unsetenv("NOTIFY_SOCKET"); | |
510 | ||
8c47c732 | 511 | return r; |
8c47c732 LP |
512 | } |
513 | ||
a354329f LP |
514 | _public_ int sd_pid_notify(pid_t pid, int unset_environment, const char *state) { |
515 | return sd_pid_notify_with_fds(pid, unset_environment, state, NULL, 0); | |
516 | } | |
517 | ||
be8f4e9e | 518 | _public_ int sd_notify(int unset_environment, const char *state) { |
a354329f | 519 | return sd_pid_notify_with_fds(0, unset_environment, state, NULL, 0); |
be8f4e9e LP |
520 | } |
521 | ||
522 | _public_ int sd_pid_notifyf(pid_t pid, int unset_environment, const char *format, ...) { | |
523 | _cleanup_free_ char *p = NULL; | |
524 | int r; | |
525 | ||
526 | if (format) { | |
527 | va_list ap; | |
528 | ||
529 | va_start(ap, format); | |
530 | r = vasprintf(&p, format, ap); | |
531 | va_end(ap); | |
532 | ||
533 | if (r < 0 || !p) | |
534 | return -ENOMEM; | |
535 | } | |
536 | ||
537 | return sd_pid_notify(pid, unset_environment, p); | |
538 | } | |
539 | ||
0ebee881 | 540 | _public_ int sd_notifyf(int unset_environment, const char *format, ...) { |
be8f4e9e | 541 | _cleanup_free_ char *p = NULL; |
8c47c732 LP |
542 | int r; |
543 | ||
be8f4e9e LP |
544 | if (format) { |
545 | va_list ap; | |
8c47c732 | 546 | |
be8f4e9e LP |
547 | va_start(ap, format); |
548 | r = vasprintf(&p, format, ap); | |
549 | va_end(ap); | |
8c47c732 | 550 | |
be8f4e9e LP |
551 | if (r < 0 || !p) |
552 | return -ENOMEM; | |
553 | } | |
8c47c732 | 554 | |
be8f4e9e | 555 | return sd_pid_notify(0, unset_environment, p); |
8c47c732 | 556 | } |
40473a70 | 557 | |
0ebee881 | 558 | _public_ int sd_booted(void) { |
66e41181 LP |
559 | /* We test whether the runtime unit file directory has been |
560 | * created. This takes place in mount-setup.c, so is | |
561 | * guaranteed to happen very early during boot. */ | |
40473a70 | 562 | |
31021ba0 | 563 | return laccess("/run/systemd/system/", F_OK) >= 0; |
40473a70 | 564 | } |
09812eb7 | 565 | |
0ebee881 | 566 | _public_ int sd_watchdog_enabled(int unset_environment, uint64_t *usec) { |
a9becdd6 | 567 | const char *s, *p = ""; /* p is set to dummy value to do unsetting */ |
be8f4e9e | 568 | uint64_t u; |
a9becdd6 | 569 | int r = 0; |
09812eb7 | 570 | |
a9becdd6 ZJS |
571 | s = getenv("WATCHDOG_USEC"); |
572 | if (!s) | |
09812eb7 | 573 | goto finish; |
09812eb7 | 574 | |
a9becdd6 | 575 | r = safe_atou64(s, &u); |
be8f4e9e | 576 | if (r < 0) |
09812eb7 | 577 | goto finish; |
a9becdd6 | 578 | if (u <= 0) { |
09812eb7 LP |
579 | r = -EINVAL; |
580 | goto finish; | |
581 | } | |
582 | ||
a9becdd6 ZJS |
583 | p = getenv("WATCHDOG_PID"); |
584 | if (p) { | |
585 | pid_t pid; | |
586 | ||
587 | r = parse_pid(p, &pid); | |
588 | if (r < 0) | |
589 | goto finish; | |
590 | ||
591 | /* Is this for us? */ | |
592 | if (getpid() != pid) { | |
593 | r = 0; | |
594 | goto finish; | |
595 | } | |
09812eb7 LP |
596 | } |
597 | ||
598 | if (usec) | |
be8f4e9e | 599 | *usec = u; |
09812eb7 LP |
600 | |
601 | r = 1; | |
602 | ||
603 | finish: | |
a9becdd6 | 604 | if (unset_environment && s) |
09812eb7 | 605 | unsetenv("WATCHDOG_USEC"); |
a9becdd6 ZJS |
606 | if (unset_environment && p) |
607 | unsetenv("WATCHDOG_PID"); | |
09812eb7 LP |
608 | |
609 | return r; | |
09812eb7 | 610 | } |