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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
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 | |
a7334b09 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
034c6ed7 LP |
22 | #include <errno.h> |
23 | #include <fcntl.h> | |
8dd4c05b LP |
24 | #include <glob.h> |
25 | #include <grp.h> | |
26 | #include <poll.h> | |
309bff19 | 27 | #include <signal.h> |
8dd4c05b LP |
28 | #include <string.h> |
29 | #include <sys/personality.h> | |
94f04347 | 30 | #include <sys/prctl.h> |
8dd4c05b | 31 | #include <sys/socket.h> |
451a074f | 32 | #include <sys/stat.h> |
8dd4c05b LP |
33 | #include <sys/un.h> |
34 | #include <unistd.h> | |
023a4f67 | 35 | #include <utmpx.h> |
5cb5a6ff | 36 | |
5b6319dc LP |
37 | #ifdef HAVE_PAM |
38 | #include <security/pam_appl.h> | |
39 | #endif | |
40 | ||
7b52a628 MS |
41 | #ifdef HAVE_SELINUX |
42 | #include <selinux/selinux.h> | |
43 | #endif | |
44 | ||
17df7223 LP |
45 | #ifdef HAVE_SECCOMP |
46 | #include <seccomp.h> | |
47 | #endif | |
48 | ||
eef65bf3 MS |
49 | #ifdef HAVE_APPARMOR |
50 | #include <sys/apparmor.h> | |
51 | #endif | |
52 | ||
24882e06 | 53 | #include "sd-messages.h" |
8dd4c05b LP |
54 | |
55 | #include "af-list.h" | |
b5efdb8a | 56 | #include "alloc-util.h" |
3ffd4af2 LP |
57 | #ifdef HAVE_APPARMOR |
58 | #include "apparmor-util.h" | |
59 | #endif | |
8dd4c05b LP |
60 | #include "async.h" |
61 | #include "barrier.h" | |
62 | #include "bus-endpoint.h" | |
63 | #include "cap-list.h" | |
430f0182 | 64 | #include "capability-util.h" |
f6a6225e | 65 | #include "def.h" |
4d1a6904 | 66 | #include "env-util.h" |
17df7223 | 67 | #include "errno-list.h" |
3ffd4af2 | 68 | #include "execute.h" |
8dd4c05b | 69 | #include "exit-status.h" |
3ffd4af2 | 70 | #include "fd-util.h" |
8dd4c05b | 71 | #include "fileio.h" |
6482f626 | 72 | #include "formats-util.h" |
f4f15635 | 73 | #include "fs-util.h" |
7d50b32a | 74 | #include "glob-util.h" |
c004493c | 75 | #include "io-util.h" |
8dd4c05b LP |
76 | #include "ioprio.h" |
77 | #include "log.h" | |
78 | #include "macro.h" | |
79 | #include "missing.h" | |
80 | #include "mkdir.h" | |
81 | #include "namespace.h" | |
6bedfcbb | 82 | #include "parse-util.h" |
8dd4c05b | 83 | #include "path-util.h" |
0b452006 | 84 | #include "process-util.h" |
78f22b97 | 85 | #include "rlimit-util.h" |
8dd4c05b | 86 | #include "rm-rf.h" |
3ffd4af2 LP |
87 | #ifdef HAVE_SECCOMP |
88 | #include "seccomp-util.h" | |
89 | #endif | |
8dd4c05b LP |
90 | #include "securebits.h" |
91 | #include "selinux-util.h" | |
24882e06 | 92 | #include "signal-util.h" |
8dd4c05b | 93 | #include "smack-util.h" |
8b43440b | 94 | #include "string-table.h" |
07630cea | 95 | #include "string-util.h" |
8dd4c05b | 96 | #include "strv.h" |
7ccbd1ae | 97 | #include "syslog-util.h" |
8dd4c05b LP |
98 | #include "terminal-util.h" |
99 | #include "unit.h" | |
b1d4f8e1 | 100 | #include "user-util.h" |
8dd4c05b LP |
101 | #include "util.h" |
102 | #include "utmp-wtmp.h" | |
5cb5a6ff | 103 | |
e056b01d | 104 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 105 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 106 | |
02a51aba LP |
107 | /* This assumes there is a 'tty' group */ |
108 | #define TTY_MODE 0620 | |
109 | ||
531dca78 LP |
110 | #define SNDBUF_SIZE (8*1024*1024) |
111 | ||
034c6ed7 LP |
112 | static int shift_fds(int fds[], unsigned n_fds) { |
113 | int start, restart_from; | |
114 | ||
115 | if (n_fds <= 0) | |
116 | return 0; | |
117 | ||
a0d40ac5 LP |
118 | /* Modifies the fds array! (sorts it) */ |
119 | ||
034c6ed7 LP |
120 | assert(fds); |
121 | ||
122 | start = 0; | |
123 | for (;;) { | |
124 | int i; | |
125 | ||
126 | restart_from = -1; | |
127 | ||
128 | for (i = start; i < (int) n_fds; i++) { | |
129 | int nfd; | |
130 | ||
131 | /* Already at right index? */ | |
132 | if (fds[i] == i+3) | |
133 | continue; | |
134 | ||
3cc2aff1 LP |
135 | nfd = fcntl(fds[i], F_DUPFD, i + 3); |
136 | if (nfd < 0) | |
034c6ed7 LP |
137 | return -errno; |
138 | ||
03e334a1 | 139 | safe_close(fds[i]); |
034c6ed7 LP |
140 | fds[i] = nfd; |
141 | ||
142 | /* Hmm, the fd we wanted isn't free? Then | |
ee33e53a | 143 | * let's remember that and try again from here */ |
034c6ed7 LP |
144 | if (nfd != i+3 && restart_from < 0) |
145 | restart_from = i; | |
146 | } | |
147 | ||
148 | if (restart_from < 0) | |
149 | break; | |
150 | ||
151 | start = restart_from; | |
152 | } | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
c2748801 | 157 | static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) { |
47a71eed | 158 | unsigned i; |
e2c76839 | 159 | int r; |
47a71eed LP |
160 | |
161 | if (n_fds <= 0) | |
162 | return 0; | |
163 | ||
164 | assert(fds); | |
165 | ||
451a074f | 166 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */ |
47a71eed LP |
167 | |
168 | for (i = 0; i < n_fds; i++) { | |
47a71eed | 169 | |
3cc2aff1 LP |
170 | r = fd_nonblock(fds[i], nonblock); |
171 | if (r < 0) | |
e2c76839 | 172 | return r; |
47a71eed | 173 | |
451a074f LP |
174 | /* We unconditionally drop FD_CLOEXEC from the fds, |
175 | * since after all we want to pass these fds to our | |
176 | * children */ | |
47a71eed | 177 | |
3cc2aff1 LP |
178 | r = fd_cloexec(fds[i], false); |
179 | if (r < 0) | |
e2c76839 | 180 | return r; |
47a71eed LP |
181 | } |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
1e22b5cd | 186 | static const char *exec_context_tty_path(const ExecContext *context) { |
80876c20 LP |
187 | assert(context); |
188 | ||
1e22b5cd LP |
189 | if (context->stdio_as_fds) |
190 | return NULL; | |
191 | ||
80876c20 LP |
192 | if (context->tty_path) |
193 | return context->tty_path; | |
194 | ||
195 | return "/dev/console"; | |
196 | } | |
197 | ||
1e22b5cd LP |
198 | static void exec_context_tty_reset(const ExecContext *context, const ExecParameters *p) { |
199 | const char *path; | |
200 | ||
6ea832a2 LP |
201 | assert(context); |
202 | ||
1e22b5cd | 203 | path = exec_context_tty_path(context); |
6ea832a2 | 204 | |
1e22b5cd LP |
205 | if (context->tty_vhangup) { |
206 | if (p && p->stdin_fd >= 0) | |
207 | (void) terminal_vhangup_fd(p->stdin_fd); | |
208 | else if (path) | |
209 | (void) terminal_vhangup(path); | |
210 | } | |
6ea832a2 | 211 | |
1e22b5cd LP |
212 | if (context->tty_reset) { |
213 | if (p && p->stdin_fd >= 0) | |
214 | (void) reset_terminal_fd(p->stdin_fd, true); | |
215 | else if (path) | |
216 | (void) reset_terminal(path); | |
217 | } | |
218 | ||
219 | if (context->tty_vt_disallocate && path) | |
220 | (void) vt_disallocate(path); | |
6ea832a2 LP |
221 | } |
222 | ||
3a1286b6 MS |
223 | static bool is_terminal_output(ExecOutput o) { |
224 | return | |
225 | o == EXEC_OUTPUT_TTY || | |
226 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
227 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
228 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
229 | } | |
230 | ||
80876c20 LP |
231 | static int open_null_as(int flags, int nfd) { |
232 | int fd, r; | |
071830ff | 233 | |
80876c20 | 234 | assert(nfd >= 0); |
071830ff | 235 | |
613b411c LP |
236 | fd = open("/dev/null", flags|O_NOCTTY); |
237 | if (fd < 0) | |
071830ff LP |
238 | return -errno; |
239 | ||
80876c20 LP |
240 | if (fd != nfd) { |
241 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 242 | safe_close(fd); |
80876c20 LP |
243 | } else |
244 | r = nfd; | |
071830ff | 245 | |
80876c20 | 246 | return r; |
071830ff LP |
247 | } |
248 | ||
524daa8c | 249 | static int connect_journal_socket(int fd, uid_t uid, gid_t gid) { |
b92bea5d ZJS |
250 | union sockaddr_union sa = { |
251 | .un.sun_family = AF_UNIX, | |
252 | .un.sun_path = "/run/systemd/journal/stdout", | |
253 | }; | |
524daa8c ZJS |
254 | uid_t olduid = UID_INVALID; |
255 | gid_t oldgid = GID_INVALID; | |
256 | int r; | |
257 | ||
258 | if (gid != GID_INVALID) { | |
259 | oldgid = getgid(); | |
260 | ||
261 | r = setegid(gid); | |
262 | if (r < 0) | |
263 | return -errno; | |
264 | } | |
265 | ||
266 | if (uid != UID_INVALID) { | |
267 | olduid = getuid(); | |
268 | ||
269 | r = seteuid(uid); | |
270 | if (r < 0) { | |
271 | r = -errno; | |
272 | goto restore_gid; | |
273 | } | |
274 | } | |
275 | ||
276 | r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); | |
277 | if (r < 0) | |
278 | r = -errno; | |
279 | ||
280 | /* If we fail to restore the uid or gid, things will likely | |
281 | fail later on. This should only happen if an LSM interferes. */ | |
282 | ||
283 | if (uid != UID_INVALID) | |
284 | (void) seteuid(olduid); | |
285 | ||
286 | restore_gid: | |
287 | if (gid != GID_INVALID) | |
288 | (void) setegid(oldgid); | |
289 | ||
290 | return r; | |
291 | } | |
292 | ||
293 | static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, const char *unit_id, int nfd, uid_t uid, gid_t gid) { | |
294 | int fd, r; | |
071830ff LP |
295 | |
296 | assert(context); | |
80876c20 LP |
297 | assert(output < _EXEC_OUTPUT_MAX); |
298 | assert(ident); | |
299 | assert(nfd >= 0); | |
071830ff | 300 | |
54fe0cdb LP |
301 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
302 | if (fd < 0) | |
80876c20 | 303 | return -errno; |
071830ff | 304 | |
524daa8c ZJS |
305 | r = connect_journal_socket(fd, uid, gid); |
306 | if (r < 0) | |
307 | return r; | |
071830ff | 308 | |
80876c20 | 309 | if (shutdown(fd, SHUT_RD) < 0) { |
03e334a1 | 310 | safe_close(fd); |
80876c20 LP |
311 | return -errno; |
312 | } | |
071830ff | 313 | |
531dca78 LP |
314 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
315 | ||
80876c20 | 316 | dprintf(fd, |
62bca2c6 | 317 | "%s\n" |
80876c20 LP |
318 | "%s\n" |
319 | "%i\n" | |
54fe0cdb LP |
320 | "%i\n" |
321 | "%i\n" | |
322 | "%i\n" | |
4f4a1dbf | 323 | "%i\n", |
4f4a1dbf | 324 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 325 | unit_id, |
54fe0cdb LP |
326 | context->syslog_priority, |
327 | !!context->syslog_level_prefix, | |
328 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
329 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 330 | is_terminal_output(output)); |
80876c20 LP |
331 | |
332 | if (fd != nfd) { | |
333 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 334 | safe_close(fd); |
80876c20 LP |
335 | } else |
336 | r = nfd; | |
071830ff | 337 | |
80876c20 LP |
338 | return r; |
339 | } | |
340 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
341 | int fd, r; | |
071830ff | 342 | |
80876c20 LP |
343 | assert(path); |
344 | assert(nfd >= 0); | |
071830ff | 345 | |
3cc2aff1 LP |
346 | fd = open_terminal(path, mode | O_NOCTTY); |
347 | if (fd < 0) | |
80876c20 | 348 | return fd; |
071830ff | 349 | |
80876c20 LP |
350 | if (fd != nfd) { |
351 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 352 | safe_close(fd); |
80876c20 LP |
353 | } else |
354 | r = nfd; | |
071830ff | 355 | |
80876c20 LP |
356 | return r; |
357 | } | |
071830ff | 358 | |
80876c20 LP |
359 | static bool is_terminal_input(ExecInput i) { |
360 | return | |
361 | i == EXEC_INPUT_TTY || | |
362 | i == EXEC_INPUT_TTY_FORCE || | |
363 | i == EXEC_INPUT_TTY_FAIL; | |
364 | } | |
071830ff | 365 | |
1e3ad081 LP |
366 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
367 | ||
368 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
369 | return EXEC_INPUT_NULL; | |
071830ff | 370 | |
03fd9c49 | 371 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
372 | return EXEC_INPUT_NULL; |
373 | ||
03fd9c49 | 374 | return std_input; |
4f2d528d LP |
375 | } |
376 | ||
03fd9c49 | 377 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 378 | |
03fd9c49 | 379 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
380 | return EXEC_OUTPUT_INHERIT; |
381 | ||
03fd9c49 | 382 | return std_output; |
4f2d528d LP |
383 | } |
384 | ||
a34ceba6 LP |
385 | static int setup_input( |
386 | const ExecContext *context, | |
387 | const ExecParameters *params, | |
388 | int socket_fd) { | |
389 | ||
4f2d528d LP |
390 | ExecInput i; |
391 | ||
392 | assert(context); | |
a34ceba6 LP |
393 | assert(params); |
394 | ||
395 | if (params->stdin_fd >= 0) { | |
396 | if (dup2(params->stdin_fd, STDIN_FILENO) < 0) | |
397 | return -errno; | |
398 | ||
399 | /* Try to make this the controlling tty, if it is a tty, and reset it */ | |
400 | (void) ioctl(STDIN_FILENO, TIOCSCTTY, context->std_input == EXEC_INPUT_TTY_FORCE); | |
401 | (void) reset_terminal_fd(STDIN_FILENO, true); | |
402 | ||
403 | return STDIN_FILENO; | |
404 | } | |
4f2d528d | 405 | |
a34ceba6 | 406 | i = fixup_input(context->std_input, socket_fd, params->apply_tty_stdin); |
4f2d528d LP |
407 | |
408 | switch (i) { | |
071830ff | 409 | |
80876c20 LP |
410 | case EXEC_INPUT_NULL: |
411 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
412 | ||
413 | case EXEC_INPUT_TTY: | |
414 | case EXEC_INPUT_TTY_FORCE: | |
415 | case EXEC_INPUT_TTY_FAIL: { | |
416 | int fd, r; | |
071830ff | 417 | |
1e22b5cd | 418 | fd = acquire_terminal(exec_context_tty_path(context), |
970edce6 ZJS |
419 | i == EXEC_INPUT_TTY_FAIL, |
420 | i == EXEC_INPUT_TTY_FORCE, | |
421 | false, | |
3a43da28 | 422 | USEC_INFINITY); |
970edce6 | 423 | if (fd < 0) |
80876c20 LP |
424 | return fd; |
425 | ||
426 | if (fd != STDIN_FILENO) { | |
427 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
03e334a1 | 428 | safe_close(fd); |
80876c20 LP |
429 | } else |
430 | r = STDIN_FILENO; | |
431 | ||
432 | return r; | |
433 | } | |
434 | ||
4f2d528d LP |
435 | case EXEC_INPUT_SOCKET: |
436 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
437 | ||
80876c20 LP |
438 | default: |
439 | assert_not_reached("Unknown input type"); | |
440 | } | |
441 | } | |
442 | ||
a34ceba6 LP |
443 | static int setup_output( |
444 | Unit *unit, | |
445 | const ExecContext *context, | |
446 | const ExecParameters *params, | |
447 | int fileno, | |
448 | int socket_fd, | |
449 | const char *ident, | |
450 | uid_t uid, gid_t gid) { | |
451 | ||
4f2d528d LP |
452 | ExecOutput o; |
453 | ExecInput i; | |
47c1d80d | 454 | int r; |
4f2d528d | 455 | |
f2341e0a | 456 | assert(unit); |
80876c20 | 457 | assert(context); |
a34ceba6 | 458 | assert(params); |
80876c20 LP |
459 | assert(ident); |
460 | ||
a34ceba6 LP |
461 | if (fileno == STDOUT_FILENO && params->stdout_fd >= 0) { |
462 | ||
463 | if (dup2(params->stdout_fd, STDOUT_FILENO) < 0) | |
464 | return -errno; | |
465 | ||
466 | return STDOUT_FILENO; | |
467 | } | |
468 | ||
469 | if (fileno == STDERR_FILENO && params->stderr_fd >= 0) { | |
470 | if (dup2(params->stderr_fd, STDERR_FILENO) < 0) | |
471 | return -errno; | |
472 | ||
473 | return STDERR_FILENO; | |
474 | } | |
475 | ||
476 | i = fixup_input(context->std_input, socket_fd, params->apply_tty_stdin); | |
03fd9c49 | 477 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 478 | |
eb17e935 MS |
479 | if (fileno == STDERR_FILENO) { |
480 | ExecOutput e; | |
481 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 482 | |
eb17e935 MS |
483 | /* This expects the input and output are already set up */ |
484 | ||
485 | /* Don't change the stderr file descriptor if we inherit all | |
486 | * the way and are not on a tty */ | |
487 | if (e == EXEC_OUTPUT_INHERIT && | |
488 | o == EXEC_OUTPUT_INHERIT && | |
489 | i == EXEC_INPUT_NULL && | |
490 | !is_terminal_input(context->std_input) && | |
491 | getppid () != 1) | |
492 | return fileno; | |
493 | ||
494 | /* Duplicate from stdout if possible */ | |
495 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
496 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 497 | |
eb17e935 | 498 | o = e; |
80876c20 | 499 | |
eb17e935 | 500 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
501 | /* If input got downgraded, inherit the original value */ |
502 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
1e22b5cd | 503 | return open_terminal_as(exec_context_tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 504 | |
acb591e4 | 505 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 506 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 507 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 508 | |
acb591e4 LP |
509 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
510 | if (getppid() != 1) | |
eb17e935 | 511 | return fileno; |
94f04347 | 512 | |
eb17e935 MS |
513 | /* We need to open /dev/null here anew, to get the right access mode. */ |
514 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 515 | } |
94f04347 | 516 | |
eb17e935 | 517 | switch (o) { |
80876c20 LP |
518 | |
519 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 520 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
521 | |
522 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 523 | if (is_terminal_input(i)) |
eb17e935 | 524 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
525 | |
526 | /* We don't reset the terminal if this is just about output */ | |
1e22b5cd | 527 | return open_terminal_as(exec_context_tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
528 | |
529 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 530 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 531 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 532 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
533 | case EXEC_OUTPUT_JOURNAL: |
534 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
f2341e0a | 535 | r = connect_logger_as(context, o, ident, unit->id, fileno, uid, gid); |
47c1d80d | 536 | if (r < 0) { |
f2341e0a | 537 | log_unit_error_errno(unit, r, "Failed to connect %s to the journal socket, ignoring: %m", fileno == STDOUT_FILENO ? "stdout" : "stderr"); |
eb17e935 | 538 | r = open_null_as(O_WRONLY, fileno); |
47c1d80d MS |
539 | } |
540 | return r; | |
4f2d528d LP |
541 | |
542 | case EXEC_OUTPUT_SOCKET: | |
543 | assert(socket_fd >= 0); | |
eb17e935 | 544 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
545 | |
546 | default: | |
80876c20 | 547 | assert_not_reached("Unknown error type"); |
94f04347 | 548 | } |
071830ff LP |
549 | } |
550 | ||
02a51aba LP |
551 | static int chown_terminal(int fd, uid_t uid) { |
552 | struct stat st; | |
553 | ||
554 | assert(fd >= 0); | |
02a51aba LP |
555 | |
556 | /* This might fail. What matters are the results. */ | |
bab45044 LP |
557 | (void) fchown(fd, uid, -1); |
558 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
559 | |
560 | if (fstat(fd, &st) < 0) | |
561 | return -errno; | |
562 | ||
d8b4e2e9 | 563 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
564 | return -EPERM; |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
3d18b167 LP |
569 | static int setup_confirm_stdio(int *_saved_stdin, int *_saved_stdout) { |
570 | _cleanup_close_ int fd = -1, saved_stdin = -1, saved_stdout = -1; | |
571 | int r; | |
80876c20 | 572 | |
80876c20 LP |
573 | assert(_saved_stdin); |
574 | assert(_saved_stdout); | |
575 | ||
af6da548 LP |
576 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
577 | if (saved_stdin < 0) | |
578 | return -errno; | |
80876c20 | 579 | |
af6da548 | 580 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
3d18b167 LP |
581 | if (saved_stdout < 0) |
582 | return -errno; | |
80876c20 | 583 | |
af6da548 LP |
584 | fd = acquire_terminal( |
585 | "/dev/console", | |
586 | false, | |
587 | false, | |
588 | false, | |
589 | DEFAULT_CONFIRM_USEC); | |
3d18b167 LP |
590 | if (fd < 0) |
591 | return fd; | |
80876c20 | 592 | |
af6da548 LP |
593 | r = chown_terminal(fd, getuid()); |
594 | if (r < 0) | |
3d18b167 | 595 | return r; |
02a51aba | 596 | |
3d18b167 LP |
597 | r = reset_terminal_fd(fd, true); |
598 | if (r < 0) | |
599 | return r; | |
80876c20 | 600 | |
3d18b167 LP |
601 | if (dup2(fd, STDIN_FILENO) < 0) |
602 | return -errno; | |
603 | ||
604 | if (dup2(fd, STDOUT_FILENO) < 0) | |
605 | return -errno; | |
80876c20 LP |
606 | |
607 | if (fd >= 2) | |
03e334a1 | 608 | safe_close(fd); |
3d18b167 | 609 | fd = -1; |
80876c20 LP |
610 | |
611 | *_saved_stdin = saved_stdin; | |
612 | *_saved_stdout = saved_stdout; | |
613 | ||
3d18b167 | 614 | saved_stdin = saved_stdout = -1; |
80876c20 | 615 | |
3d18b167 | 616 | return 0; |
80876c20 LP |
617 | } |
618 | ||
44b601bc | 619 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
03e334a1 | 620 | _cleanup_close_ int fd = -1; |
af6da548 | 621 | va_list ap; |
80876c20 | 622 | |
af6da548 | 623 | assert(format); |
80876c20 | 624 | |
af6da548 LP |
625 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
626 | if (fd < 0) | |
627 | return fd; | |
80876c20 | 628 | |
af6da548 LP |
629 | va_start(ap, format); |
630 | vdprintf(fd, format, ap); | |
631 | va_end(ap); | |
80876c20 | 632 | |
af6da548 LP |
633 | return 0; |
634 | } | |
80876c20 | 635 | |
3d18b167 | 636 | static int restore_confirm_stdio(int *saved_stdin, int *saved_stdout) { |
af6da548 | 637 | int r = 0; |
80876c20 | 638 | |
af6da548 LP |
639 | assert(saved_stdin); |
640 | assert(saved_stdout); | |
641 | ||
642 | release_terminal(); | |
643 | ||
644 | if (*saved_stdin >= 0) | |
80876c20 | 645 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 646 | r = -errno; |
80876c20 | 647 | |
af6da548 | 648 | if (*saved_stdout >= 0) |
80876c20 | 649 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 650 | r = -errno; |
80876c20 | 651 | |
3d18b167 LP |
652 | *saved_stdin = safe_close(*saved_stdin); |
653 | *saved_stdout = safe_close(*saved_stdout); | |
af6da548 LP |
654 | |
655 | return r; | |
656 | } | |
657 | ||
658 | static int ask_for_confirmation(char *response, char **argv) { | |
659 | int saved_stdout = -1, saved_stdin = -1, r; | |
e1d75803 | 660 | _cleanup_free_ char *line = NULL; |
af6da548 LP |
661 | |
662 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
663 | if (r < 0) | |
664 | return r; | |
665 | ||
666 | line = exec_command_line(argv); | |
667 | if (!line) | |
668 | return -ENOMEM; | |
669 | ||
418b9be5 | 670 | r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line); |
af6da548 LP |
671 | |
672 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
673 | ||
674 | return r; | |
80876c20 LP |
675 | } |
676 | ||
81a2b7ce LP |
677 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
678 | bool keep_groups = false; | |
679 | int r; | |
680 | ||
681 | assert(context); | |
682 | ||
35b8ca3a | 683 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
684 | * we avoid NSS lookups for gid=0. */ |
685 | ||
686 | if (context->group || username) { | |
81a2b7ce LP |
687 | /* First step, initialize groups from /etc/groups */ |
688 | if (username && gid != 0) { | |
689 | if (initgroups(username, gid) < 0) | |
690 | return -errno; | |
691 | ||
692 | keep_groups = true; | |
693 | } | |
694 | ||
695 | /* Second step, set our gids */ | |
696 | if (setresgid(gid, gid, gid) < 0) | |
697 | return -errno; | |
698 | } | |
699 | ||
700 | if (context->supplementary_groups) { | |
701 | int ngroups_max, k; | |
702 | gid_t *gids; | |
703 | char **i; | |
704 | ||
705 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 706 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
707 | |
708 | if (!(gids = new(gid_t, ngroups_max))) | |
709 | return -ENOMEM; | |
710 | ||
711 | if (keep_groups) { | |
3cc2aff1 LP |
712 | k = getgroups(ngroups_max, gids); |
713 | if (k < 0) { | |
81a2b7ce LP |
714 | free(gids); |
715 | return -errno; | |
716 | } | |
717 | } else | |
718 | k = 0; | |
719 | ||
720 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 721 | const char *g; |
81a2b7ce LP |
722 | |
723 | if (k >= ngroups_max) { | |
724 | free(gids); | |
725 | return -E2BIG; | |
726 | } | |
727 | ||
4b67834e LP |
728 | g = *i; |
729 | r = get_group_creds(&g, gids+k); | |
730 | if (r < 0) { | |
81a2b7ce LP |
731 | free(gids); |
732 | return r; | |
733 | } | |
734 | ||
735 | k++; | |
736 | } | |
737 | ||
738 | if (setgroups(k, gids) < 0) { | |
739 | free(gids); | |
740 | return -errno; | |
741 | } | |
742 | ||
743 | free(gids); | |
744 | } | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
749 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
81a2b7ce LP |
750 | assert(context); |
751 | ||
752 | /* Sets (but doesn't lookup) the uid and make sure we keep the | |
753 | * capabilities while doing so. */ | |
754 | ||
755d4b67 | 755 | if (context->capabilities || context->capability_ambient_set != 0) { |
81a2b7ce LP |
756 | |
757 | /* First step: If we need to keep capabilities but | |
758 | * drop privileges we need to make sure we keep our | |
cbb21cca | 759 | * caps, while we drop privileges. */ |
693ced48 | 760 | if (uid != 0) { |
cbb21cca | 761 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
762 | |
763 | if (prctl(PR_GET_SECUREBITS) != sb) | |
764 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
765 | return -errno; | |
766 | } | |
81a2b7ce | 767 | |
35b8ca3a | 768 | /* Second step: set the capabilities. This will reduce |
81a2b7ce LP |
769 | * the capabilities to the minimum we need. */ |
770 | ||
755d4b67 IP |
771 | if (context->capabilities) { |
772 | _cleanup_cap_free_ cap_t d = NULL; | |
773 | static const cap_value_t bits[] = { | |
774 | CAP_SETUID, /* Necessary so that we can run setresuid() below */ | |
775 | CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */ | |
776 | }; | |
81a2b7ce | 777 | |
755d4b67 IP |
778 | d = cap_dup(context->capabilities); |
779 | if (!d) | |
780 | return -errno; | |
81a2b7ce | 781 | |
755d4b67 IP |
782 | if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 || |
783 | cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) | |
784 | return -errno; | |
785 | ||
786 | if (cap_set_proc(d) < 0) | |
787 | return -errno; | |
788 | } | |
81a2b7ce LP |
789 | } |
790 | ||
791 | /* Third step: actually set the uids */ | |
792 | if (setresuid(uid, uid, uid) < 0) | |
793 | return -errno; | |
794 | ||
795 | /* At this point we should have all necessary capabilities but | |
796 | are otherwise a normal user. However, the caps might got | |
797 | corrupted due to the setresuid() so we need clean them up | |
798 | later. This is done outside of this call. */ | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
5b6319dc LP |
803 | #ifdef HAVE_PAM |
804 | ||
805 | static int null_conv( | |
806 | int num_msg, | |
807 | const struct pam_message **msg, | |
808 | struct pam_response **resp, | |
809 | void *appdata_ptr) { | |
810 | ||
811 | /* We don't support conversations */ | |
812 | ||
813 | return PAM_CONV_ERR; | |
814 | } | |
815 | ||
816 | static int setup_pam( | |
817 | const char *name, | |
818 | const char *user, | |
940c5210 | 819 | uid_t uid, |
5b6319dc LP |
820 | const char *tty, |
821 | char ***pam_env, | |
822 | int fds[], unsigned n_fds) { | |
823 | ||
824 | static const struct pam_conv conv = { | |
825 | .conv = null_conv, | |
826 | .appdata_ptr = NULL | |
827 | }; | |
828 | ||
2d7c6aa2 | 829 | _cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL; |
5b6319dc | 830 | pam_handle_t *handle = NULL; |
d6e5f3ad | 831 | sigset_t old_ss; |
7bb70b6e | 832 | int pam_code = PAM_SUCCESS, r; |
5b6319dc LP |
833 | char **e = NULL; |
834 | bool close_session = false; | |
835 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 836 | int flags = 0; |
5b6319dc LP |
837 | |
838 | assert(name); | |
839 | assert(user); | |
840 | assert(pam_env); | |
841 | ||
842 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 843 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
844 | * systemd via the cgroup logic. It will then remove the PAM |
845 | * session again. The parent process will exec() the actual | |
846 | * daemon. We do things this way to ensure that the main PID | |
847 | * of the daemon is the one we initially fork()ed. */ | |
848 | ||
7bb70b6e LP |
849 | r = barrier_create(&barrier); |
850 | if (r < 0) | |
2d7c6aa2 DH |
851 | goto fail; |
852 | ||
553d2243 | 853 | if (log_get_max_level() < LOG_DEBUG) |
970edce6 ZJS |
854 | flags |= PAM_SILENT; |
855 | ||
f546241b ZJS |
856 | pam_code = pam_start(name, user, &conv, &handle); |
857 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
858 | handle = NULL; |
859 | goto fail; | |
860 | } | |
861 | ||
f546241b ZJS |
862 | if (tty) { |
863 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
864 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 865 | goto fail; |
f546241b | 866 | } |
5b6319dc | 867 | |
970edce6 | 868 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 869 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
870 | goto fail; |
871 | ||
970edce6 | 872 | pam_code = pam_open_session(handle, flags); |
f546241b | 873 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
874 | goto fail; |
875 | ||
876 | close_session = true; | |
877 | ||
f546241b ZJS |
878 | e = pam_getenvlist(handle); |
879 | if (!e) { | |
5b6319dc LP |
880 | pam_code = PAM_BUF_ERR; |
881 | goto fail; | |
882 | } | |
883 | ||
884 | /* Block SIGTERM, so that we know that it won't get lost in | |
885 | * the child */ | |
ce30c8dc | 886 | |
72c0a2c2 | 887 | assert_se(sigprocmask_many(SIG_BLOCK, &old_ss, SIGTERM, -1) >= 0); |
5b6319dc LP |
888 | |
889 | parent_pid = getpid(); | |
890 | ||
f546241b | 891 | pam_pid = fork(); |
7bb70b6e LP |
892 | if (pam_pid < 0) { |
893 | r = -errno; | |
5b6319dc | 894 | goto fail; |
7bb70b6e | 895 | } |
5b6319dc LP |
896 | |
897 | if (pam_pid == 0) { | |
7bb70b6e | 898 | int sig, ret = EXIT_PAM; |
5b6319dc LP |
899 | |
900 | /* The child's job is to reset the PAM session on | |
901 | * termination */ | |
2d7c6aa2 | 902 | barrier_set_role(&barrier, BARRIER_CHILD); |
5b6319dc LP |
903 | |
904 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
905 | * of "/sbin/init"), to look pretty in /bin/ps */ |
906 | rename_process("(sd-pam)"); | |
5b6319dc LP |
907 | |
908 | /* Make sure we don't keep open the passed fds in this | |
909 | child. We assume that otherwise only those fds are | |
910 | open here that have been opened by PAM. */ | |
911 | close_many(fds, n_fds); | |
912 | ||
940c5210 AK |
913 | /* Drop privileges - we don't need any to pam_close_session |
914 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
915 | * If this fails, ignore the error - but expect sd-pam threads | |
916 | * to fail to exit normally */ | |
917 | if (setresuid(uid, uid, uid) < 0) | |
da927ba9 | 918 | log_error_errno(r, "Error: Failed to setresuid() in sd-pam: %m"); |
940c5210 | 919 | |
ce30c8dc LP |
920 | (void) ignore_signals(SIGPIPE, -1); |
921 | ||
940c5210 AK |
922 | /* Wait until our parent died. This will only work if |
923 | * the above setresuid() succeeds, otherwise the kernel | |
924 | * will not allow unprivileged parents kill their privileged | |
925 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
926 | * to do the rest for us. */ |
927 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
928 | goto child_finish; | |
929 | ||
2d7c6aa2 DH |
930 | /* Tell the parent that our setup is done. This is especially |
931 | * important regarding dropping privileges. Otherwise, unit | |
932 | * setup might race against our setresuid(2) call. */ | |
933 | barrier_place(&barrier); | |
934 | ||
5b6319dc LP |
935 | /* Check if our parent process might already have |
936 | * died? */ | |
937 | if (getppid() == parent_pid) { | |
d6e5f3ad DM |
938 | sigset_t ss; |
939 | ||
940 | assert_se(sigemptyset(&ss) >= 0); | |
941 | assert_se(sigaddset(&ss, SIGTERM) >= 0); | |
942 | ||
3dead8d9 LP |
943 | for (;;) { |
944 | if (sigwait(&ss, &sig) < 0) { | |
945 | if (errno == EINTR) | |
946 | continue; | |
947 | ||
948 | goto child_finish; | |
949 | } | |
5b6319dc | 950 | |
3dead8d9 LP |
951 | assert(sig == SIGTERM); |
952 | break; | |
953 | } | |
5b6319dc LP |
954 | } |
955 | ||
3dead8d9 | 956 | /* If our parent died we'll end the session */ |
f546241b | 957 | if (getppid() != parent_pid) { |
970edce6 | 958 | pam_code = pam_close_session(handle, flags); |
f546241b | 959 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 960 | goto child_finish; |
f546241b | 961 | } |
5b6319dc | 962 | |
7bb70b6e | 963 | ret = 0; |
5b6319dc LP |
964 | |
965 | child_finish: | |
970edce6 | 966 | pam_end(handle, pam_code | flags); |
7bb70b6e | 967 | _exit(ret); |
5b6319dc LP |
968 | } |
969 | ||
2d7c6aa2 DH |
970 | barrier_set_role(&barrier, BARRIER_PARENT); |
971 | ||
5b6319dc LP |
972 | /* If the child was forked off successfully it will do all the |
973 | * cleanups, so forget about the handle here. */ | |
974 | handle = NULL; | |
975 | ||
3b8bddde | 976 | /* Unblock SIGTERM again in the parent */ |
72c0a2c2 | 977 | assert_se(sigprocmask(SIG_SETMASK, &old_ss, NULL) >= 0); |
5b6319dc LP |
978 | |
979 | /* We close the log explicitly here, since the PAM modules | |
980 | * might have opened it, but we don't want this fd around. */ | |
981 | closelog(); | |
982 | ||
2d7c6aa2 DH |
983 | /* Synchronously wait for the child to initialize. We don't care for |
984 | * errors as we cannot recover. However, warn loudly if it happens. */ | |
985 | if (!barrier_place_and_sync(&barrier)) | |
986 | log_error("PAM initialization failed"); | |
987 | ||
aa87e624 LP |
988 | *pam_env = e; |
989 | e = NULL; | |
990 | ||
5b6319dc LP |
991 | return 0; |
992 | ||
993 | fail: | |
970edce6 ZJS |
994 | if (pam_code != PAM_SUCCESS) { |
995 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
7bb70b6e LP |
996 | r = -EPERM; /* PAM errors do not map to errno */ |
997 | } else | |
998 | log_error_errno(r, "PAM failed: %m"); | |
9ba35398 | 999 | |
5b6319dc LP |
1000 | if (handle) { |
1001 | if (close_session) | |
970edce6 | 1002 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 1003 | |
970edce6 | 1004 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
1005 | } |
1006 | ||
1007 | strv_free(e); | |
5b6319dc LP |
1008 | closelog(); |
1009 | ||
7bb70b6e | 1010 | return r; |
5b6319dc LP |
1011 | } |
1012 | #endif | |
1013 | ||
5d6b1584 LP |
1014 | static void rename_process_from_path(const char *path) { |
1015 | char process_name[11]; | |
1016 | const char *p; | |
1017 | size_t l; | |
1018 | ||
1019 | /* This resulting string must fit in 10 chars (i.e. the length | |
1020 | * of "/sbin/init") to look pretty in /bin/ps */ | |
1021 | ||
2b6bf07d | 1022 | p = basename(path); |
5d6b1584 LP |
1023 | if (isempty(p)) { |
1024 | rename_process("(...)"); | |
1025 | return; | |
1026 | } | |
1027 | ||
1028 | l = strlen(p); | |
1029 | if (l > 8) { | |
1030 | /* The end of the process name is usually more | |
1031 | * interesting, since the first bit might just be | |
1032 | * "systemd-" */ | |
1033 | p = p + l - 8; | |
1034 | l = 8; | |
1035 | } | |
1036 | ||
1037 | process_name[0] = '('; | |
1038 | memcpy(process_name+1, p, l); | |
1039 | process_name[1+l] = ')'; | |
1040 | process_name[1+l+1] = 0; | |
1041 | ||
1042 | rename_process(process_name); | |
1043 | } | |
1044 | ||
c0467cf3 | 1045 | #ifdef HAVE_SECCOMP |
17df7223 | 1046 | |
822a5960 | 1047 | static int apply_seccomp(const ExecContext *c) { |
17df7223 LP |
1048 | uint32_t negative_action, action; |
1049 | scmp_filter_ctx *seccomp; | |
c0467cf3 RC |
1050 | Iterator i; |
1051 | void *id; | |
17df7223 | 1052 | int r; |
8351ceae | 1053 | |
c0467cf3 | 1054 | assert(c); |
8351ceae | 1055 | |
17df7223 LP |
1056 | negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); |
1057 | ||
1058 | seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); | |
1059 | if (!seccomp) | |
1060 | return -ENOMEM; | |
8351ceae | 1061 | |
e9642be2 LP |
1062 | if (c->syscall_archs) { |
1063 | ||
1064 | SET_FOREACH(id, c->syscall_archs, i) { | |
1065 | r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); | |
1066 | if (r == -EEXIST) | |
1067 | continue; | |
7c66bae2 LP |
1068 | if (r < 0) |
1069 | goto finish; | |
e9642be2 | 1070 | } |
e9642be2 | 1071 | |
7c66bae2 | 1072 | } else { |
e9642be2 | 1073 | r = seccomp_add_secondary_archs(seccomp); |
7c66bae2 LP |
1074 | if (r < 0) |
1075 | goto finish; | |
57183d11 | 1076 | } |
8351ceae | 1077 | |
57183d11 | 1078 | action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action; |
17df7223 LP |
1079 | SET_FOREACH(id, c->syscall_filter, i) { |
1080 | r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0); | |
7c66bae2 LP |
1081 | if (r < 0) |
1082 | goto finish; | |
c0467cf3 | 1083 | } |
8351ceae | 1084 | |
7c66bae2 LP |
1085 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); |
1086 | if (r < 0) | |
1087 | goto finish; | |
1088 | ||
17df7223 | 1089 | r = seccomp_load(seccomp); |
7c66bae2 LP |
1090 | |
1091 | finish: | |
17df7223 | 1092 | seccomp_release(seccomp); |
4298d0b5 LP |
1093 | return r; |
1094 | } | |
1095 | ||
822a5960 | 1096 | static int apply_address_families(const ExecContext *c) { |
4298d0b5 LP |
1097 | scmp_filter_ctx *seccomp; |
1098 | Iterator i; | |
1099 | int r; | |
1100 | ||
1101 | assert(c); | |
1102 | ||
1103 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1104 | if (!seccomp) | |
1105 | return -ENOMEM; | |
1106 | ||
1107 | r = seccomp_add_secondary_archs(seccomp); | |
1108 | if (r < 0) | |
1109 | goto finish; | |
1110 | ||
1111 | if (c->address_families_whitelist) { | |
1112 | int af, first = 0, last = 0; | |
1113 | void *afp; | |
1114 | ||
1115 | /* If this is a whitelist, we first block the address | |
1116 | * families that are out of range and then everything | |
1117 | * that is not in the set. First, we find the lowest | |
1118 | * and highest address family in the set. */ | |
1119 | ||
1120 | SET_FOREACH(afp, c->address_families, i) { | |
1121 | af = PTR_TO_INT(afp); | |
17df7223 | 1122 | |
4298d0b5 LP |
1123 | if (af <= 0 || af >= af_max()) |
1124 | continue; | |
1125 | ||
1126 | if (first == 0 || af < first) | |
1127 | first = af; | |
1128 | ||
1129 | if (last == 0 || af > last) | |
1130 | last = af; | |
1131 | } | |
1132 | ||
1133 | assert((first == 0) == (last == 0)); | |
1134 | ||
1135 | if (first == 0) { | |
1136 | ||
1137 | /* No entries in the valid range, block everything */ | |
1138 | r = seccomp_rule_add( | |
1139 | seccomp, | |
1140 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1141 | SCMP_SYS(socket), | |
1142 | 0); | |
1143 | if (r < 0) | |
1144 | goto finish; | |
1145 | ||
1146 | } else { | |
1147 | ||
1148 | /* Block everything below the first entry */ | |
1149 | r = seccomp_rule_add( | |
1150 | seccomp, | |
1151 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1152 | SCMP_SYS(socket), | |
1153 | 1, | |
1154 | SCMP_A0(SCMP_CMP_LT, first)); | |
1155 | if (r < 0) | |
1156 | goto finish; | |
1157 | ||
1158 | /* Block everything above the last entry */ | |
1159 | r = seccomp_rule_add( | |
1160 | seccomp, | |
1161 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1162 | SCMP_SYS(socket), | |
1163 | 1, | |
1164 | SCMP_A0(SCMP_CMP_GT, last)); | |
1165 | if (r < 0) | |
1166 | goto finish; | |
1167 | ||
1168 | /* Block everything between the first and last | |
1169 | * entry */ | |
1170 | for (af = 1; af < af_max(); af++) { | |
1171 | ||
1172 | if (set_contains(c->address_families, INT_TO_PTR(af))) | |
1173 | continue; | |
1174 | ||
1175 | r = seccomp_rule_add( | |
1176 | seccomp, | |
1177 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1178 | SCMP_SYS(socket), | |
1179 | 1, | |
1180 | SCMP_A0(SCMP_CMP_EQ, af)); | |
1181 | if (r < 0) | |
1182 | goto finish; | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | } else { | |
1187 | void *af; | |
1188 | ||
1189 | /* If this is a blacklist, then generate one rule for | |
1190 | * each address family that are then combined in OR | |
1191 | * checks. */ | |
1192 | ||
1193 | SET_FOREACH(af, c->address_families, i) { | |
1194 | ||
1195 | r = seccomp_rule_add( | |
1196 | seccomp, | |
1197 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1198 | SCMP_SYS(socket), | |
1199 | 1, | |
1200 | SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af))); | |
1201 | if (r < 0) | |
1202 | goto finish; | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1207 | if (r < 0) | |
1208 | goto finish; | |
1209 | ||
1210 | r = seccomp_load(seccomp); | |
1211 | ||
1212 | finish: | |
1213 | seccomp_release(seccomp); | |
17df7223 | 1214 | return r; |
8351ceae | 1215 | } |
4298d0b5 | 1216 | |
c0467cf3 | 1217 | #endif |
8351ceae | 1218 | |
31a7eb86 ZJS |
1219 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
1220 | assert(idle_pipe); | |
1221 | ||
03e334a1 | 1222 | |
54eb2300 LP |
1223 | idle_pipe[1] = safe_close(idle_pipe[1]); |
1224 | idle_pipe[2] = safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1225 | |
1226 | if (idle_pipe[0] >= 0) { | |
1227 | int r; | |
1228 | ||
1229 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1230 | ||
1231 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
c7cc737f LP |
1232 | ssize_t n; |
1233 | ||
31a7eb86 | 1234 | /* Signal systemd that we are bored and want to continue. */ |
c7cc737f LP |
1235 | n = write(idle_pipe[3], "x", 1); |
1236 | if (n > 0) | |
cd972d69 ZJS |
1237 | /* Wait for systemd to react to the signal above. */ |
1238 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
31a7eb86 ZJS |
1239 | } |
1240 | ||
54eb2300 | 1241 | idle_pipe[0] = safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1242 | |
1243 | } | |
1244 | ||
54eb2300 | 1245 | idle_pipe[3] = safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1246 | } |
1247 | ||
7cae38c4 | 1248 | static int build_environment( |
9fa95f85 | 1249 | const ExecContext *c, |
1e22b5cd | 1250 | const ExecParameters *p, |
7cae38c4 LP |
1251 | unsigned n_fds, |
1252 | const char *home, | |
1253 | const char *username, | |
1254 | const char *shell, | |
1255 | char ***ret) { | |
1256 | ||
1257 | _cleanup_strv_free_ char **our_env = NULL; | |
1258 | unsigned n_env = 0; | |
1259 | char *x; | |
1260 | ||
1261 | assert(c); | |
1262 | assert(ret); | |
1263 | ||
8dd4c05b | 1264 | our_env = new0(char*, 11); |
7cae38c4 LP |
1265 | if (!our_env) |
1266 | return -ENOMEM; | |
1267 | ||
1268 | if (n_fds > 0) { | |
8dd4c05b LP |
1269 | _cleanup_free_ char *joined = NULL; |
1270 | ||
ccd06097 | 1271 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0) |
7cae38c4 LP |
1272 | return -ENOMEM; |
1273 | our_env[n_env++] = x; | |
1274 | ||
1275 | if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0) | |
1276 | return -ENOMEM; | |
1277 | our_env[n_env++] = x; | |
8dd4c05b | 1278 | |
1e22b5cd | 1279 | joined = strv_join(p->fd_names, ":"); |
8dd4c05b LP |
1280 | if (!joined) |
1281 | return -ENOMEM; | |
1282 | ||
1283 | x = strjoin("LISTEN_FDNAMES=", joined, NULL); | |
1284 | if (!x) | |
1285 | return -ENOMEM; | |
1286 | our_env[n_env++] = x; | |
7cae38c4 LP |
1287 | } |
1288 | ||
1e22b5cd | 1289 | if (p->watchdog_usec > 0) { |
ccd06097 | 1290 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0) |
09812eb7 LP |
1291 | return -ENOMEM; |
1292 | our_env[n_env++] = x; | |
1293 | ||
1e22b5cd | 1294 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, p->watchdog_usec) < 0) |
09812eb7 LP |
1295 | return -ENOMEM; |
1296 | our_env[n_env++] = x; | |
1297 | } | |
1298 | ||
7cae38c4 LP |
1299 | if (home) { |
1300 | x = strappend("HOME=", home); | |
1301 | if (!x) | |
1302 | return -ENOMEM; | |
1303 | our_env[n_env++] = x; | |
1304 | } | |
1305 | ||
1306 | if (username) { | |
1307 | x = strappend("LOGNAME=", username); | |
1308 | if (!x) | |
1309 | return -ENOMEM; | |
1310 | our_env[n_env++] = x; | |
1311 | ||
1312 | x = strappend("USER=", username); | |
1313 | if (!x) | |
1314 | return -ENOMEM; | |
1315 | our_env[n_env++] = x; | |
1316 | } | |
1317 | ||
1318 | if (shell) { | |
1319 | x = strappend("SHELL=", shell); | |
1320 | if (!x) | |
1321 | return -ENOMEM; | |
1322 | our_env[n_env++] = x; | |
1323 | } | |
1324 | ||
1325 | if (is_terminal_input(c->std_input) || | |
1326 | c->std_output == EXEC_OUTPUT_TTY || | |
1327 | c->std_error == EXEC_OUTPUT_TTY || | |
1328 | c->tty_path) { | |
1329 | ||
1e22b5cd | 1330 | x = strdup(default_term_for_tty(exec_context_tty_path(c))); |
7cae38c4 LP |
1331 | if (!x) |
1332 | return -ENOMEM; | |
1333 | our_env[n_env++] = x; | |
1334 | } | |
1335 | ||
1336 | our_env[n_env++] = NULL; | |
8dd4c05b | 1337 | assert(n_env <= 11); |
7cae38c4 LP |
1338 | |
1339 | *ret = our_env; | |
1340 | our_env = NULL; | |
1341 | ||
1342 | return 0; | |
1343 | } | |
1344 | ||
b4c14404 FB |
1345 | static int build_pass_environment(const ExecContext *c, char ***ret) { |
1346 | _cleanup_strv_free_ char **pass_env = NULL; | |
1347 | size_t n_env = 0, n_bufsize = 0; | |
1348 | char **i; | |
1349 | ||
1350 | STRV_FOREACH(i, c->pass_environment) { | |
1351 | _cleanup_free_ char *x = NULL; | |
1352 | char *v; | |
1353 | ||
1354 | v = getenv(*i); | |
1355 | if (!v) | |
1356 | continue; | |
1357 | x = strjoin(*i, "=", v, NULL); | |
1358 | if (!x) | |
1359 | return -ENOMEM; | |
1360 | if (!GREEDY_REALLOC(pass_env, n_bufsize, n_env + 2)) | |
1361 | return -ENOMEM; | |
1362 | pass_env[n_env++] = x; | |
1363 | pass_env[n_env] = NULL; | |
1364 | x = NULL; | |
1365 | } | |
1366 | ||
1367 | *ret = pass_env; | |
1368 | pass_env = NULL; | |
1369 | ||
1370 | return 0; | |
1371 | } | |
1372 | ||
8b44a3d2 LP |
1373 | static bool exec_needs_mount_namespace( |
1374 | const ExecContext *context, | |
1375 | const ExecParameters *params, | |
1376 | ExecRuntime *runtime) { | |
1377 | ||
1378 | assert(context); | |
1379 | assert(params); | |
1380 | ||
1381 | if (!strv_isempty(context->read_write_dirs) || | |
1382 | !strv_isempty(context->read_only_dirs) || | |
1383 | !strv_isempty(context->inaccessible_dirs)) | |
1384 | return true; | |
1385 | ||
1386 | if (context->mount_flags != 0) | |
1387 | return true; | |
1388 | ||
1389 | if (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) | |
1390 | return true; | |
1391 | ||
1392 | if (params->bus_endpoint_path) | |
1393 | return true; | |
1394 | ||
1395 | if (context->private_devices || | |
1396 | context->protect_system != PROTECT_SYSTEM_NO || | |
1397 | context->protect_home != PROTECT_HOME_NO) | |
1398 | return true; | |
1399 | ||
1400 | return false; | |
1401 | } | |
1402 | ||
a34ceba6 LP |
1403 | static int close_remaining_fds( |
1404 | const ExecParameters *params, | |
1405 | ExecRuntime *runtime, | |
1406 | int socket_fd, | |
1407 | int *fds, unsigned n_fds) { | |
1408 | ||
1409 | unsigned n_dont_close = 0; | |
1410 | int dont_close[n_fds + 7]; | |
1411 | ||
1412 | assert(params); | |
1413 | ||
1414 | if (params->stdin_fd >= 0) | |
1415 | dont_close[n_dont_close++] = params->stdin_fd; | |
1416 | if (params->stdout_fd >= 0) | |
1417 | dont_close[n_dont_close++] = params->stdout_fd; | |
1418 | if (params->stderr_fd >= 0) | |
1419 | dont_close[n_dont_close++] = params->stderr_fd; | |
1420 | ||
1421 | if (socket_fd >= 0) | |
1422 | dont_close[n_dont_close++] = socket_fd; | |
1423 | if (n_fds > 0) { | |
1424 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
1425 | n_dont_close += n_fds; | |
1426 | } | |
1427 | ||
1428 | if (params->bus_endpoint_fd >= 0) | |
1429 | dont_close[n_dont_close++] = params->bus_endpoint_fd; | |
1430 | ||
1431 | if (runtime) { | |
1432 | if (runtime->netns_storage_socket[0] >= 0) | |
1433 | dont_close[n_dont_close++] = runtime->netns_storage_socket[0]; | |
1434 | if (runtime->netns_storage_socket[1] >= 0) | |
1435 | dont_close[n_dont_close++] = runtime->netns_storage_socket[1]; | |
1436 | } | |
1437 | ||
1438 | return close_all_fds(dont_close, n_dont_close); | |
1439 | } | |
1440 | ||
ff0af2a1 | 1441 | static int exec_child( |
f2341e0a | 1442 | Unit *unit, |
ff0af2a1 LP |
1443 | ExecCommand *command, |
1444 | const ExecContext *context, | |
1445 | const ExecParameters *params, | |
1446 | ExecRuntime *runtime, | |
1447 | char **argv, | |
1448 | int socket_fd, | |
1449 | int *fds, unsigned n_fds, | |
1450 | char **files_env, | |
1451 | int *exit_status) { | |
d35fbf6b | 1452 | |
b4c14404 | 1453 | _cleanup_strv_free_ char **our_env = NULL, **pass_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL; |
9008e1ac | 1454 | _cleanup_free_ char *mac_selinux_context_net = NULL; |
5f5d8eab | 1455 | const char *username = NULL, *home = NULL, *shell = NULL, *wd; |
fed1e721 LP |
1456 | uid_t uid = UID_INVALID; |
1457 | gid_t gid = GID_INVALID; | |
ff0af2a1 | 1458 | int i, r; |
ee818b89 | 1459 | bool needs_mount_namespace; |
034c6ed7 | 1460 | |
f2341e0a | 1461 | assert(unit); |
5cb5a6ff LP |
1462 | assert(command); |
1463 | assert(context); | |
d35fbf6b | 1464 | assert(params); |
ff0af2a1 | 1465 | assert(exit_status); |
d35fbf6b DM |
1466 | |
1467 | rename_process_from_path(command->path); | |
1468 | ||
1469 | /* We reset exactly these signals, since they are the | |
1470 | * only ones we set to SIG_IGN in the main daemon. All | |
1471 | * others we leave untouched because we set them to | |
1472 | * SIG_DFL or a valid handler initially, both of which | |
1473 | * will be demoted to SIG_DFL. */ | |
ce30c8dc LP |
1474 | (void) default_signals(SIGNALS_CRASH_HANDLER, |
1475 | SIGNALS_IGNORE, -1); | |
d35fbf6b DM |
1476 | |
1477 | if (context->ignore_sigpipe) | |
ce30c8dc | 1478 | (void) ignore_signals(SIGPIPE, -1); |
d35fbf6b | 1479 | |
ff0af2a1 LP |
1480 | r = reset_signal_mask(); |
1481 | if (r < 0) { | |
1482 | *exit_status = EXIT_SIGNAL_MASK; | |
1483 | return r; | |
d35fbf6b | 1484 | } |
034c6ed7 | 1485 | |
d35fbf6b DM |
1486 | if (params->idle_pipe) |
1487 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 1488 | |
d35fbf6b DM |
1489 | /* Close sockets very early to make sure we don't |
1490 | * block init reexecution because it cannot bind its | |
1491 | * sockets */ | |
ff0af2a1 | 1492 | |
d35fbf6b | 1493 | log_forget_fds(); |
4f2d528d | 1494 | |
a34ceba6 | 1495 | r = close_remaining_fds(params, runtime, socket_fd, fds, n_fds); |
ff0af2a1 LP |
1496 | if (r < 0) { |
1497 | *exit_status = EXIT_FDS; | |
1498 | return r; | |
8c7be95e LP |
1499 | } |
1500 | ||
d35fbf6b DM |
1501 | if (!context->same_pgrp) |
1502 | if (setsid() < 0) { | |
ff0af2a1 | 1503 | *exit_status = EXIT_SETSID; |
d35fbf6b DM |
1504 | return -errno; |
1505 | } | |
9e2f7c11 | 1506 | |
1e22b5cd | 1507 | exec_context_tty_reset(context, params); |
d35fbf6b DM |
1508 | |
1509 | if (params->confirm_spawn) { | |
1510 | char response; | |
1511 | ||
ff0af2a1 LP |
1512 | r = ask_for_confirmation(&response, argv); |
1513 | if (r == -ETIMEDOUT) | |
d35fbf6b | 1514 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); |
ff0af2a1 LP |
1515 | else if (r < 0) |
1516 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-r)); | |
d35fbf6b DM |
1517 | else if (response == 's') { |
1518 | write_confirm_message("Skipping execution.\n"); | |
ff0af2a1 | 1519 | *exit_status = EXIT_CONFIRM; |
d35fbf6b DM |
1520 | return -ECANCELED; |
1521 | } else if (response == 'n') { | |
1522 | write_confirm_message("Failing execution.\n"); | |
ff0af2a1 | 1523 | *exit_status = 0; |
d35fbf6b DM |
1524 | return 0; |
1525 | } | |
1526 | } | |
1a63a750 | 1527 | |
524daa8c ZJS |
1528 | if (context->user) { |
1529 | username = context->user; | |
ff0af2a1 LP |
1530 | r = get_user_creds(&username, &uid, &gid, &home, &shell); |
1531 | if (r < 0) { | |
1532 | *exit_status = EXIT_USER; | |
1533 | return r; | |
524daa8c ZJS |
1534 | } |
1535 | } | |
1536 | ||
5bc7452b RC |
1537 | if (context->group) { |
1538 | const char *g = context->group; | |
1539 | ||
1540 | r = get_group_creds(&g, &gid); | |
1541 | if (r < 0) { | |
1542 | *exit_status = EXIT_GROUP; | |
1543 | return r; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | ||
d35fbf6b DM |
1548 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1549 | * must sure to drop O_NONBLOCK */ | |
1550 | if (socket_fd >= 0) | |
a34ceba6 | 1551 | (void) fd_nonblock(socket_fd, false); |
acbb0225 | 1552 | |
a34ceba6 | 1553 | r = setup_input(context, params, socket_fd); |
ff0af2a1 LP |
1554 | if (r < 0) { |
1555 | *exit_status = EXIT_STDIN; | |
1556 | return r; | |
d35fbf6b | 1557 | } |
034c6ed7 | 1558 | |
a34ceba6 | 1559 | r = setup_output(unit, context, params, STDOUT_FILENO, socket_fd, basename(command->path), uid, gid); |
ff0af2a1 LP |
1560 | if (r < 0) { |
1561 | *exit_status = EXIT_STDOUT; | |
1562 | return r; | |
d35fbf6b DM |
1563 | } |
1564 | ||
a34ceba6 | 1565 | r = setup_output(unit, context, params, STDERR_FILENO, socket_fd, basename(command->path), uid, gid); |
ff0af2a1 LP |
1566 | if (r < 0) { |
1567 | *exit_status = EXIT_STDERR; | |
1568 | return r; | |
d35fbf6b DM |
1569 | } |
1570 | ||
1571 | if (params->cgroup_path) { | |
ff0af2a1 LP |
1572 | r = cg_attach_everywhere(params->cgroup_supported, params->cgroup_path, 0, NULL, NULL); |
1573 | if (r < 0) { | |
1574 | *exit_status = EXIT_CGROUP; | |
1575 | return r; | |
309bff19 | 1576 | } |
d35fbf6b | 1577 | } |
309bff19 | 1578 | |
d35fbf6b | 1579 | if (context->oom_score_adjust_set) { |
d5243d62 | 1580 | char t[DECIMAL_STR_MAX(context->oom_score_adjust)]; |
f2b68789 | 1581 | |
d5243d62 LP |
1582 | /* When we can't make this change due to EPERM, then |
1583 | * let's silently skip over it. User namespaces | |
1584 | * prohibit write access to this file, and we | |
1585 | * shouldn't trip up over that. */ | |
613b411c | 1586 | |
d5243d62 | 1587 | sprintf(t, "%i", context->oom_score_adjust); |
ad118bda | 1588 | r = write_string_file("/proc/self/oom_score_adj", t, 0); |
6cb7fa17 | 1589 | if (r == -EPERM || r == -EACCES) { |
ff0af2a1 | 1590 | log_open(); |
f2341e0a | 1591 | log_unit_debug_errno(unit, r, "Failed to adjust OOM setting, assuming containerized execution, ignoring: %m"); |
ff0af2a1 LP |
1592 | log_close(); |
1593 | } else if (r < 0) { | |
1594 | *exit_status = EXIT_OOM_ADJUST; | |
d35fbf6b | 1595 | return -errno; |
613b411c | 1596 | } |
d35fbf6b DM |
1597 | } |
1598 | ||
1599 | if (context->nice_set) | |
1600 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
ff0af2a1 | 1601 | *exit_status = EXIT_NICE; |
d35fbf6b | 1602 | return -errno; |
613b411c LP |
1603 | } |
1604 | ||
d35fbf6b DM |
1605 | if (context->cpu_sched_set) { |
1606 | struct sched_param param = { | |
1607 | .sched_priority = context->cpu_sched_priority, | |
1608 | }; | |
1609 | ||
ff0af2a1 LP |
1610 | r = sched_setscheduler(0, |
1611 | context->cpu_sched_policy | | |
1612 | (context->cpu_sched_reset_on_fork ? | |
1613 | SCHED_RESET_ON_FORK : 0), | |
1614 | ¶m); | |
1615 | if (r < 0) { | |
1616 | *exit_status = EXIT_SETSCHEDULER; | |
d35fbf6b | 1617 | return -errno; |
fc9b2a84 | 1618 | } |
d35fbf6b | 1619 | } |
fc9b2a84 | 1620 | |
d35fbf6b DM |
1621 | if (context->cpuset) |
1622 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
ff0af2a1 | 1623 | *exit_status = EXIT_CPUAFFINITY; |
d35fbf6b | 1624 | return -errno; |
034c6ed7 LP |
1625 | } |
1626 | ||
d35fbf6b DM |
1627 | if (context->ioprio_set) |
1628 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
ff0af2a1 | 1629 | *exit_status = EXIT_IOPRIO; |
d35fbf6b DM |
1630 | return -errno; |
1631 | } | |
da726a4d | 1632 | |
d35fbf6b DM |
1633 | if (context->timer_slack_nsec != NSEC_INFINITY) |
1634 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
ff0af2a1 | 1635 | *exit_status = EXIT_TIMERSLACK; |
d35fbf6b | 1636 | return -errno; |
4c2630eb | 1637 | } |
9eba9da4 | 1638 | |
050f7277 | 1639 | if (context->personality != PERSONALITY_INVALID) |
d35fbf6b | 1640 | if (personality(context->personality) < 0) { |
ff0af2a1 | 1641 | *exit_status = EXIT_PERSONALITY; |
d35fbf6b | 1642 | return -errno; |
4c2630eb | 1643 | } |
94f04347 | 1644 | |
d35fbf6b | 1645 | if (context->utmp_id) |
023a4f67 LP |
1646 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path, |
1647 | context->utmp_mode == EXEC_UTMP_INIT ? INIT_PROCESS : | |
1648 | context->utmp_mode == EXEC_UTMP_LOGIN ? LOGIN_PROCESS : | |
1649 | USER_PROCESS, | |
1650 | username ? "root" : context->user); | |
d35fbf6b | 1651 | |
524daa8c | 1652 | if (context->user && is_terminal_input(context->std_input)) { |
ff0af2a1 LP |
1653 | r = chown_terminal(STDIN_FILENO, uid); |
1654 | if (r < 0) { | |
1655 | *exit_status = EXIT_STDIN; | |
1656 | return r; | |
071830ff | 1657 | } |
d35fbf6b | 1658 | } |
8e274523 | 1659 | |
e44da745 | 1660 | if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) { |
fed1e721 | 1661 | uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid; |
e44da745 | 1662 | |
ff0af2a1 LP |
1663 | r = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint); |
1664 | if (r < 0) { | |
1665 | *exit_status = EXIT_BUS_ENDPOINT; | |
1666 | return r; | |
e44da745 DM |
1667 | } |
1668 | } | |
e44da745 | 1669 | |
a931ad47 LP |
1670 | /* If delegation is enabled we'll pass ownership of the cgroup |
1671 | * (but only in systemd's own controller hierarchy!) to the | |
1672 | * user of the new process. */ | |
1673 | if (params->cgroup_path && context->user && params->cgroup_delegate) { | |
ff0af2a1 LP |
1674 | r = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid); |
1675 | if (r < 0) { | |
1676 | *exit_status = EXIT_CGROUP; | |
1677 | return r; | |
d35fbf6b | 1678 | } |
034c6ed7 | 1679 | |
034c6ed7 | 1680 | |
ff0af2a1 LP |
1681 | r = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0755, uid, gid); |
1682 | if (r < 0) { | |
1683 | *exit_status = EXIT_CGROUP; | |
1684 | return r; | |
034c6ed7 | 1685 | } |
d35fbf6b | 1686 | } |
034c6ed7 | 1687 | |
d35fbf6b DM |
1688 | if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) { |
1689 | char **rt; | |
fb33a393 | 1690 | |
d35fbf6b DM |
1691 | STRV_FOREACH(rt, context->runtime_directory) { |
1692 | _cleanup_free_ char *p; | |
94f04347 | 1693 | |
d35fbf6b DM |
1694 | p = strjoin(params->runtime_prefix, "/", *rt, NULL); |
1695 | if (!p) { | |
ff0af2a1 | 1696 | *exit_status = EXIT_RUNTIME_DIRECTORY; |
d35fbf6b | 1697 | return -ENOMEM; |
94f04347 | 1698 | } |
94f04347 | 1699 | |
6bfe5c28 LP |
1700 | r = mkdir_p_label(p, context->runtime_directory_mode); |
1701 | if (r < 0) { | |
1702 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1703 | return r; | |
1704 | } | |
1705 | ||
1706 | r = chmod_and_chown(p, context->runtime_directory_mode, uid, gid); | |
ff0af2a1 LP |
1707 | if (r < 0) { |
1708 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1709 | return r; | |
94f04347 | 1710 | } |
d35fbf6b DM |
1711 | } |
1712 | } | |
94f04347 | 1713 | |
b213e1c1 SW |
1714 | umask(context->umask); |
1715 | ||
d35fbf6b | 1716 | if (params->apply_permissions) { |
ff0af2a1 LP |
1717 | r = enforce_groups(context, username, gid); |
1718 | if (r < 0) { | |
1719 | *exit_status = EXIT_GROUP; | |
1720 | return r; | |
d35fbf6b | 1721 | } |
6bf6e43e | 1722 | #ifdef HAVE_SMACK |
6bf6e43e SW |
1723 | if (context->smack_process_label) { |
1724 | r = mac_smack_apply_pid(0, context->smack_process_label); | |
1725 | if (r < 0) { | |
1726 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1727 | return r; | |
1728 | } | |
1729 | } | |
1730 | #ifdef SMACK_DEFAULT_PROCESS_LABEL | |
1731 | else { | |
1732 | _cleanup_free_ char *exec_label = NULL; | |
1733 | ||
1734 | r = mac_smack_read(command->path, SMACK_ATTR_EXEC, &exec_label); | |
1735 | if (r < 0 && r != -ENODATA && r != -EOPNOTSUPP) { | |
1736 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1737 | return r; | |
1738 | } | |
1739 | ||
1740 | r = mac_smack_apply_pid(0, exec_label ? : SMACK_DEFAULT_PROCESS_LABEL); | |
1741 | if (r < 0) { | |
1742 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1743 | return r; | |
1744 | } | |
1745 | } | |
6bf6e43e SW |
1746 | #endif |
1747 | #endif | |
d35fbf6b | 1748 | #ifdef HAVE_PAM |
b213e1c1 SW |
1749 | if (context->pam_name && username) { |
1750 | r = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds); | |
1751 | if (r < 0) { | |
1752 | *exit_status = EXIT_PAM; | |
1753 | return r; | |
1754 | } | |
d35fbf6b | 1755 | } |
d35fbf6b | 1756 | #endif |
b213e1c1 | 1757 | } |
ac45f971 | 1758 | |
d35fbf6b | 1759 | if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) { |
ff0af2a1 LP |
1760 | r = setup_netns(runtime->netns_storage_socket); |
1761 | if (r < 0) { | |
1762 | *exit_status = EXIT_NETWORK; | |
1763 | return r; | |
d35fbf6b DM |
1764 | } |
1765 | } | |
169c1bda | 1766 | |
ee818b89 AC |
1767 | needs_mount_namespace = exec_needs_mount_namespace(context, params, runtime); |
1768 | ||
1769 | if (needs_mount_namespace) { | |
d35fbf6b DM |
1770 | char *tmp = NULL, *var = NULL; |
1771 | ||
1772 | /* The runtime struct only contains the parent | |
1773 | * of the private /tmp, which is | |
1774 | * non-accessible to world users. Inside of it | |
1775 | * there's a /tmp that is sticky, and that's | |
1776 | * the one we want to use here. */ | |
1777 | ||
1778 | if (context->private_tmp && runtime) { | |
1779 | if (runtime->tmp_dir) | |
63c372cb | 1780 | tmp = strjoina(runtime->tmp_dir, "/tmp"); |
d35fbf6b | 1781 | if (runtime->var_tmp_dir) |
63c372cb | 1782 | var = strjoina(runtime->var_tmp_dir, "/tmp"); |
d35fbf6b | 1783 | } |
d8b4e2e9 | 1784 | |
ff0af2a1 | 1785 | r = setup_namespace( |
ee818b89 | 1786 | params->apply_chroot ? context->root_directory : NULL, |
d35fbf6b DM |
1787 | context->read_write_dirs, |
1788 | context->read_only_dirs, | |
1789 | context->inaccessible_dirs, | |
1790 | tmp, | |
1791 | var, | |
e44da745 | 1792 | params->bus_endpoint_path, |
d35fbf6b DM |
1793 | context->private_devices, |
1794 | context->protect_home, | |
1795 | context->protect_system, | |
1796 | context->mount_flags); | |
0015ebf3 | 1797 | |
ff0af2a1 LP |
1798 | /* If we couldn't set up the namespace this is |
1799 | * probably due to a missing capability. In this case, | |
1800 | * silently proceeed. */ | |
1801 | if (r == -EPERM || r == -EACCES) { | |
1802 | log_open(); | |
f2341e0a | 1803 | log_unit_debug_errno(unit, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m"); |
ff0af2a1 LP |
1804 | log_close(); |
1805 | } else if (r < 0) { | |
1806 | *exit_status = EXIT_NAMESPACE; | |
1807 | return r; | |
81a2b7ce | 1808 | } |
d35fbf6b | 1809 | } |
81a2b7ce | 1810 | |
5f5d8eab LP |
1811 | if (context->working_directory_home) |
1812 | wd = home; | |
1813 | else if (context->working_directory) | |
1814 | wd = context->working_directory; | |
1815 | else | |
1816 | wd = "/"; | |
1817 | ||
d35fbf6b | 1818 | if (params->apply_chroot) { |
ee818b89 | 1819 | if (!needs_mount_namespace && context->root_directory) |
d35fbf6b | 1820 | if (chroot(context->root_directory) < 0) { |
ff0af2a1 | 1821 | *exit_status = EXIT_CHROOT; |
d35fbf6b | 1822 | return -errno; |
8aa75193 LP |
1823 | } |
1824 | ||
5f5d8eab | 1825 | if (chdir(wd) < 0 && |
4c08c824 | 1826 | !context->working_directory_missing_ok) { |
ff0af2a1 | 1827 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1828 | return -errno; |
1829 | } | |
1830 | } else { | |
5f5d8eab | 1831 | const char *d; |
8aa75193 | 1832 | |
5f5d8eab | 1833 | d = strjoina(strempty(context->root_directory), "/", strempty(wd)); |
cf1d0302 LP |
1834 | if (chdir(d) < 0 && |
1835 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1836 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1837 | return -errno; |
1838 | } | |
1839 | } | |
e66cf1a3 | 1840 | |
9008e1ac MS |
1841 | #ifdef HAVE_SELINUX |
1842 | if (params->apply_permissions && mac_selinux_use() && params->selinux_context_net && socket_fd >= 0) { | |
ff0af2a1 LP |
1843 | r = mac_selinux_get_child_mls_label(socket_fd, command->path, context->selinux_context, &mac_selinux_context_net); |
1844 | if (r < 0) { | |
1845 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1846 | return r; | |
9008e1ac MS |
1847 | } |
1848 | } | |
1849 | #endif | |
1850 | ||
d35fbf6b DM |
1851 | /* We repeat the fd closing here, to make sure that |
1852 | * nothing is leaked from the PAM modules. Note that | |
1853 | * we are more aggressive this time since socket_fd | |
e44da745 DM |
1854 | * and the netns fds we don't need anymore. The custom |
1855 | * endpoint fd was needed to upload the policy and can | |
1856 | * now be closed as well. */ | |
ff0af2a1 LP |
1857 | r = close_all_fds(fds, n_fds); |
1858 | if (r >= 0) | |
1859 | r = shift_fds(fds, n_fds); | |
1860 | if (r >= 0) | |
1861 | r = flags_fds(fds, n_fds, context->non_blocking); | |
1862 | if (r < 0) { | |
1863 | *exit_status = EXIT_FDS; | |
1864 | return r; | |
d35fbf6b | 1865 | } |
e66cf1a3 | 1866 | |
d35fbf6b | 1867 | if (params->apply_permissions) { |
e66cf1a3 | 1868 | |
755d4b67 IP |
1869 | int secure_bits = context->secure_bits; |
1870 | ||
d35fbf6b DM |
1871 | for (i = 0; i < _RLIMIT_MAX; i++) { |
1872 | if (!context->rlimit[i]) | |
1873 | continue; | |
1874 | ||
1875 | if (setrlimit_closest(i, context->rlimit[i]) < 0) { | |
ff0af2a1 | 1876 | *exit_status = EXIT_LIMITS; |
d35fbf6b | 1877 | return -errno; |
e66cf1a3 LP |
1878 | } |
1879 | } | |
1880 | ||
a103496c IP |
1881 | if (!cap_test_all(context->capability_bounding_set)) { |
1882 | r = capability_bounding_set_drop(context->capability_bounding_set, false); | |
ff0af2a1 LP |
1883 | if (r < 0) { |
1884 | *exit_status = EXIT_CAPABILITIES; | |
1885 | return r; | |
3b8bddde | 1886 | } |
4c2630eb | 1887 | } |
3b8bddde | 1888 | |
755d4b67 IP |
1889 | /* This is done before enforce_user, but ambient set |
1890 | * does not survive over setresuid() if keep_caps is not set. */ | |
1891 | if (context->capability_ambient_set != 0) { | |
1892 | r = capability_ambient_set_apply(context->capability_ambient_set, true); | |
1893 | if (r < 0) { | |
1894 | *exit_status = EXIT_CAPABILITIES; | |
1895 | return r; | |
1896 | } | |
1897 | ||
1898 | if (context->capabilities) { | |
1899 | ||
1900 | /* The capabilities in ambient set need to be also in the inherited | |
1901 | * set. If they aren't, trying to get them will fail. Add the ambient | |
1902 | * set inherited capabilities to the capability set in the context. | |
1903 | * This is needed because if capabilities are set (using "Capabilities=" | |
1904 | * keyword), they will override whatever we set now. */ | |
1905 | ||
1906 | r = capability_update_inherited_set(context->capabilities, context->capability_ambient_set); | |
1907 | if (r < 0) { | |
1908 | *exit_status = EXIT_CAPABILITIES; | |
1909 | return r; | |
1910 | } | |
1911 | } | |
1912 | } | |
1913 | ||
d35fbf6b | 1914 | if (context->user) { |
ff0af2a1 LP |
1915 | r = enforce_user(context, uid); |
1916 | if (r < 0) { | |
1917 | *exit_status = EXIT_USER; | |
1918 | return r; | |
5b6319dc | 1919 | } |
755d4b67 IP |
1920 | if (context->capability_ambient_set != 0) { |
1921 | ||
1922 | /* Fix the ambient capabilities after user change. */ | |
1923 | r = capability_ambient_set_apply(context->capability_ambient_set, false); | |
1924 | if (r < 0) { | |
1925 | *exit_status = EXIT_CAPABILITIES; | |
1926 | return r; | |
1927 | } | |
1928 | ||
1929 | /* If we were asked to change user and ambient capabilities | |
1930 | * were requested, we had to add keep-caps to the securebits | |
1931 | * so that we would maintain the inherited capability set | |
1932 | * through the setresuid(). Make sure that the bit is added | |
1933 | * also to the context secure_bits so that we don't try to | |
1934 | * drop the bit away next. */ | |
1935 | ||
1936 | secure_bits |= 1<<SECURE_KEEP_CAPS; | |
1937 | } | |
5b6319dc | 1938 | } |
d35fbf6b DM |
1939 | |
1940 | /* PR_GET_SECUREBITS is not privileged, while | |
1941 | * PR_SET_SECUREBITS is. So to suppress | |
1942 | * potential EPERMs we'll try not to call | |
1943 | * PR_SET_SECUREBITS unless necessary. */ | |
755d4b67 IP |
1944 | if (prctl(PR_GET_SECUREBITS) != secure_bits) |
1945 | if (prctl(PR_SET_SECUREBITS, secure_bits) < 0) { | |
ff0af2a1 | 1946 | *exit_status = EXIT_SECUREBITS; |
d35fbf6b | 1947 | return -errno; |
ff01d048 | 1948 | } |
5b6319dc | 1949 | |
d35fbf6b DM |
1950 | if (context->capabilities) |
1951 | if (cap_set_proc(context->capabilities) < 0) { | |
ff0af2a1 | 1952 | *exit_status = EXIT_CAPABILITIES; |
d35fbf6b | 1953 | return -errno; |
613b411c LP |
1954 | } |
1955 | ||
d35fbf6b DM |
1956 | if (context->no_new_privileges) |
1957 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { | |
ff0af2a1 | 1958 | *exit_status = EXIT_NO_NEW_PRIVILEGES; |
d35fbf6b DM |
1959 | return -errno; |
1960 | } | |
1961 | ||
1962 | #ifdef HAVE_SECCOMP | |
1963 | if (context->address_families_whitelist || | |
1964 | !set_isempty(context->address_families)) { | |
ff0af2a1 LP |
1965 | r = apply_address_families(context); |
1966 | if (r < 0) { | |
1967 | *exit_status = EXIT_ADDRESS_FAMILIES; | |
1968 | return r; | |
4c2630eb MS |
1969 | } |
1970 | } | |
04aa0cb9 | 1971 | |
d35fbf6b DM |
1972 | if (context->syscall_whitelist || |
1973 | !set_isempty(context->syscall_filter) || | |
1974 | !set_isempty(context->syscall_archs)) { | |
ff0af2a1 LP |
1975 | r = apply_seccomp(context); |
1976 | if (r < 0) { | |
1977 | *exit_status = EXIT_SECCOMP; | |
1978 | return r; | |
81a2b7ce | 1979 | } |
d35fbf6b DM |
1980 | } |
1981 | #endif | |
81a2b7ce | 1982 | |
d35fbf6b | 1983 | #ifdef HAVE_SELINUX |
6baa7db0 | 1984 | if (mac_selinux_use()) { |
9008e1ac | 1985 | char *exec_context = mac_selinux_context_net ?: context->selinux_context; |
16115b0a | 1986 | |
9008e1ac | 1987 | if (exec_context) { |
ff0af2a1 LP |
1988 | r = setexeccon(exec_context); |
1989 | if (r < 0) { | |
1990 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1991 | return r; | |
16115b0a | 1992 | } |
81a2b7ce | 1993 | } |
81a2b7ce | 1994 | } |
d35fbf6b | 1995 | #endif |
81a2b7ce | 1996 | |
d35fbf6b | 1997 | #ifdef HAVE_APPARMOR |
6baa7db0 | 1998 | if (context->apparmor_profile && mac_apparmor_use()) { |
ff0af2a1 LP |
1999 | r = aa_change_onexec(context->apparmor_profile); |
2000 | if (r < 0 && !context->apparmor_profile_ignore) { | |
2001 | *exit_status = EXIT_APPARMOR_PROFILE; | |
5482192e | 2002 | return -errno; |
d35fbf6b | 2003 | } |
034c6ed7 | 2004 | } |
d35fbf6b DM |
2005 | #endif |
2006 | } | |
034c6ed7 | 2007 | |
1e22b5cd | 2008 | r = build_environment(context, params, n_fds, home, username, shell, &our_env); |
ff0af2a1 LP |
2009 | if (r < 0) { |
2010 | *exit_status = EXIT_MEMORY; | |
2011 | return r; | |
d35fbf6b | 2012 | } |
034c6ed7 | 2013 | |
b4c14404 FB |
2014 | r = build_pass_environment(context, &pass_env); |
2015 | if (r < 0) { | |
2016 | *exit_status = EXIT_MEMORY; | |
2017 | return r; | |
2018 | } | |
2019 | ||
2020 | final_env = strv_env_merge(6, | |
d35fbf6b DM |
2021 | params->environment, |
2022 | our_env, | |
b4c14404 | 2023 | pass_env, |
d35fbf6b DM |
2024 | context->environment, |
2025 | files_env, | |
2026 | pam_env, | |
2027 | NULL); | |
2028 | if (!final_env) { | |
ff0af2a1 | 2029 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
2030 | return -ENOMEM; |
2031 | } | |
81a2b7ce | 2032 | |
d35fbf6b DM |
2033 | final_argv = replace_env_argv(argv, final_env); |
2034 | if (!final_argv) { | |
ff0af2a1 | 2035 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
2036 | return -ENOMEM; |
2037 | } | |
034c6ed7 | 2038 | |
d35fbf6b | 2039 | final_env = strv_env_clean(final_env); |
260abb78 | 2040 | |
553d2243 | 2041 | if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { |
d35fbf6b | 2042 | _cleanup_free_ char *line; |
81a2b7ce | 2043 | |
d35fbf6b DM |
2044 | line = exec_command_line(final_argv); |
2045 | if (line) { | |
2046 | log_open(); | |
f2341e0a LP |
2047 | log_struct(LOG_DEBUG, |
2048 | LOG_UNIT_ID(unit), | |
2049 | "EXECUTABLE=%s", command->path, | |
2050 | LOG_UNIT_MESSAGE(unit, "Executing: %s", line), | |
2051 | NULL); | |
d35fbf6b DM |
2052 | log_close(); |
2053 | } | |
2054 | } | |
dd305ec9 | 2055 | |
d35fbf6b | 2056 | execve(command->path, final_argv, final_env); |
ff0af2a1 | 2057 | *exit_status = EXIT_EXEC; |
d35fbf6b DM |
2058 | return -errno; |
2059 | } | |
81a2b7ce | 2060 | |
f2341e0a LP |
2061 | int exec_spawn(Unit *unit, |
2062 | ExecCommand *command, | |
d35fbf6b DM |
2063 | const ExecContext *context, |
2064 | const ExecParameters *params, | |
2065 | ExecRuntime *runtime, | |
2066 | pid_t *ret) { | |
8351ceae | 2067 | |
d35fbf6b DM |
2068 | _cleanup_strv_free_ char **files_env = NULL; |
2069 | int *fds = NULL; unsigned n_fds = 0; | |
ff0af2a1 LP |
2070 | _cleanup_free_ char *line = NULL; |
2071 | int socket_fd, r; | |
2072 | char **argv; | |
d35fbf6b | 2073 | pid_t pid; |
8351ceae | 2074 | |
f2341e0a | 2075 | assert(unit); |
d35fbf6b DM |
2076 | assert(command); |
2077 | assert(context); | |
2078 | assert(ret); | |
2079 | assert(params); | |
2080 | assert(params->fds || params->n_fds <= 0); | |
4298d0b5 | 2081 | |
d35fbf6b DM |
2082 | if (context->std_input == EXEC_INPUT_SOCKET || |
2083 | context->std_output == EXEC_OUTPUT_SOCKET || | |
2084 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 2085 | |
ff0af2a1 | 2086 | if (params->n_fds != 1) { |
f2341e0a | 2087 | log_unit_error(unit, "Got more than one socket."); |
d35fbf6b | 2088 | return -EINVAL; |
ff0af2a1 | 2089 | } |
eef65bf3 | 2090 | |
d35fbf6b DM |
2091 | socket_fd = params->fds[0]; |
2092 | } else { | |
2093 | socket_fd = -1; | |
2094 | fds = params->fds; | |
2095 | n_fds = params->n_fds; | |
2096 | } | |
94f04347 | 2097 | |
f2341e0a | 2098 | r = exec_context_load_environment(unit, context, &files_env); |
ff0af2a1 | 2099 | if (r < 0) |
f2341e0a | 2100 | return log_unit_error_errno(unit, r, "Failed to load environment files: %m"); |
034c6ed7 | 2101 | |
d35fbf6b | 2102 | argv = params->argv ?: command->argv; |
d35fbf6b DM |
2103 | line = exec_command_line(argv); |
2104 | if (!line) | |
2105 | return log_oom(); | |
fab56fc5 | 2106 | |
f2341e0a LP |
2107 | log_struct(LOG_DEBUG, |
2108 | LOG_UNIT_ID(unit), | |
2109 | LOG_UNIT_MESSAGE(unit, "About to execute: %s", line), | |
2110 | "EXECUTABLE=%s", command->path, | |
2111 | NULL); | |
d35fbf6b DM |
2112 | pid = fork(); |
2113 | if (pid < 0) | |
74129a12 | 2114 | return log_unit_error_errno(unit, errno, "Failed to fork: %m"); |
d35fbf6b DM |
2115 | |
2116 | if (pid == 0) { | |
ff0af2a1 LP |
2117 | int exit_status; |
2118 | ||
f2341e0a LP |
2119 | r = exec_child(unit, |
2120 | command, | |
ff0af2a1 LP |
2121 | context, |
2122 | params, | |
2123 | runtime, | |
2124 | argv, | |
2125 | socket_fd, | |
2126 | fds, n_fds, | |
2127 | files_env, | |
2128 | &exit_status); | |
2129 | if (r < 0) { | |
4c2630eb | 2130 | log_open(); |
f2341e0a LP |
2131 | log_struct_errno(LOG_ERR, r, |
2132 | LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), | |
2133 | LOG_UNIT_ID(unit), | |
2134 | LOG_UNIT_MESSAGE(unit, "Failed at step %s spawning %s: %m", | |
2135 | exit_status_to_string(exit_status, EXIT_STATUS_SYSTEMD), | |
2136 | command->path), | |
2137 | "EXECUTABLE=%s", command->path, | |
2138 | NULL); | |
4c2630eb MS |
2139 | } |
2140 | ||
ff0af2a1 | 2141 | _exit(exit_status); |
034c6ed7 LP |
2142 | } |
2143 | ||
f2341e0a | 2144 | log_unit_debug(unit, "Forked %s as "PID_FMT, command->path, pid); |
23635a85 | 2145 | |
80876c20 LP |
2146 | /* We add the new process to the cgroup both in the child (so |
2147 | * that we can be sure that no user code is ever executed | |
2148 | * outside of the cgroup) and in the parent (so that we can be | |
2149 | * sure that when we kill the cgroup the process will be | |
2150 | * killed too). */ | |
d35fbf6b | 2151 | if (params->cgroup_path) |
dd305ec9 | 2152 | (void) cg_attach(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, pid); |
2da3263a | 2153 | |
b58b4116 | 2154 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 2155 | |
034c6ed7 | 2156 | *ret = pid; |
5cb5a6ff LP |
2157 | return 0; |
2158 | } | |
2159 | ||
034c6ed7 LP |
2160 | void exec_context_init(ExecContext *c) { |
2161 | assert(c); | |
2162 | ||
4c12626c | 2163 | c->umask = 0022; |
9eba9da4 | 2164 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 2165 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 2166 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 2167 | c->syslog_level_prefix = true; |
353e12c2 | 2168 | c->ignore_sigpipe = true; |
3a43da28 | 2169 | c->timer_slack_nsec = NSEC_INFINITY; |
050f7277 | 2170 | c->personality = PERSONALITY_INVALID; |
e66cf1a3 | 2171 | c->runtime_directory_mode = 0755; |
a103496c | 2172 | c->capability_bounding_set = CAP_ALL; |
034c6ed7 LP |
2173 | } |
2174 | ||
613b411c | 2175 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
2176 | unsigned l; |
2177 | ||
2178 | assert(c); | |
2179 | ||
6796073e LP |
2180 | c->environment = strv_free(c->environment); |
2181 | c->environment_files = strv_free(c->environment_files); | |
b4c14404 | 2182 | c->pass_environment = strv_free(c->pass_environment); |
8c7be95e | 2183 | |
1f6b4113 | 2184 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) |
a1e58e8e | 2185 | c->rlimit[l] = mfree(c->rlimit[l]); |
034c6ed7 | 2186 | |
a1e58e8e LP |
2187 | c->working_directory = mfree(c->working_directory); |
2188 | c->root_directory = mfree(c->root_directory); | |
2189 | c->tty_path = mfree(c->tty_path); | |
2190 | c->syslog_identifier = mfree(c->syslog_identifier); | |
2191 | c->user = mfree(c->user); | |
2192 | c->group = mfree(c->group); | |
034c6ed7 | 2193 | |
6796073e | 2194 | c->supplementary_groups = strv_free(c->supplementary_groups); |
94f04347 | 2195 | |
a1e58e8e | 2196 | c->pam_name = mfree(c->pam_name); |
5b6319dc | 2197 | |
94f04347 LP |
2198 | if (c->capabilities) { |
2199 | cap_free(c->capabilities); | |
2200 | c->capabilities = NULL; | |
2201 | } | |
15ae422b | 2202 | |
6796073e LP |
2203 | c->read_only_dirs = strv_free(c->read_only_dirs); |
2204 | c->read_write_dirs = strv_free(c->read_write_dirs); | |
2205 | c->inaccessible_dirs = strv_free(c->inaccessible_dirs); | |
82c121a4 LP |
2206 | |
2207 | if (c->cpuset) | |
2208 | CPU_FREE(c->cpuset); | |
86a3475b | 2209 | |
a1e58e8e LP |
2210 | c->utmp_id = mfree(c->utmp_id); |
2211 | c->selinux_context = mfree(c->selinux_context); | |
2212 | c->apparmor_profile = mfree(c->apparmor_profile); | |
eef65bf3 | 2213 | |
525d3cc7 LP |
2214 | c->syscall_filter = set_free(c->syscall_filter); |
2215 | c->syscall_archs = set_free(c->syscall_archs); | |
2216 | c->address_families = set_free(c->address_families); | |
e66cf1a3 | 2217 | |
6796073e | 2218 | c->runtime_directory = strv_free(c->runtime_directory); |
bb7dd0b0 DM |
2219 | |
2220 | bus_endpoint_free(c->bus_endpoint); | |
2221 | c->bus_endpoint = NULL; | |
e66cf1a3 LP |
2222 | } |
2223 | ||
2224 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) { | |
2225 | char **i; | |
2226 | ||
2227 | assert(c); | |
2228 | ||
2229 | if (!runtime_prefix) | |
2230 | return 0; | |
2231 | ||
2232 | STRV_FOREACH(i, c->runtime_directory) { | |
2233 | _cleanup_free_ char *p; | |
2234 | ||
2235 | p = strjoin(runtime_prefix, "/", *i, NULL); | |
2236 | if (!p) | |
2237 | return -ENOMEM; | |
2238 | ||
2239 | /* We execute this synchronously, since we need to be | |
2240 | * sure this is gone when we start the service | |
2241 | * next. */ | |
c6878637 | 2242 | (void) rm_rf(p, REMOVE_ROOT); |
e66cf1a3 LP |
2243 | } |
2244 | ||
2245 | return 0; | |
5cb5a6ff LP |
2246 | } |
2247 | ||
43d0fcbd LP |
2248 | void exec_command_done(ExecCommand *c) { |
2249 | assert(c); | |
2250 | ||
a1e58e8e | 2251 | c->path = mfree(c->path); |
43d0fcbd | 2252 | |
6796073e | 2253 | c->argv = strv_free(c->argv); |
43d0fcbd LP |
2254 | } |
2255 | ||
2256 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
2257 | unsigned i; | |
2258 | ||
2259 | for (i = 0; i < n; i++) | |
2260 | exec_command_done(c+i); | |
2261 | } | |
2262 | ||
f1acf85a | 2263 | ExecCommand* exec_command_free_list(ExecCommand *c) { |
5cb5a6ff LP |
2264 | ExecCommand *i; |
2265 | ||
2266 | while ((i = c)) { | |
71fda00f | 2267 | LIST_REMOVE(command, c, i); |
43d0fcbd | 2268 | exec_command_done(i); |
5cb5a6ff LP |
2269 | free(i); |
2270 | } | |
f1acf85a ZJS |
2271 | |
2272 | return NULL; | |
5cb5a6ff LP |
2273 | } |
2274 | ||
034c6ed7 LP |
2275 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
2276 | unsigned i; | |
2277 | ||
f1acf85a ZJS |
2278 | for (i = 0; i < n; i++) |
2279 | c[i] = exec_command_free_list(c[i]); | |
034c6ed7 LP |
2280 | } |
2281 | ||
039f0e70 | 2282 | typedef struct InvalidEnvInfo { |
f2341e0a | 2283 | Unit *unit; |
039f0e70 LP |
2284 | const char *path; |
2285 | } InvalidEnvInfo; | |
2286 | ||
2287 | static void invalid_env(const char *p, void *userdata) { | |
2288 | InvalidEnvInfo *info = userdata; | |
2289 | ||
f2341e0a | 2290 | log_unit_error(info->unit, "Ignoring invalid environment assignment '%s': %s", p, info->path); |
039f0e70 LP |
2291 | } |
2292 | ||
f2341e0a | 2293 | int exec_context_load_environment(Unit *unit, const ExecContext *c, char ***l) { |
8c7be95e LP |
2294 | char **i, **r = NULL; |
2295 | ||
2296 | assert(c); | |
2297 | assert(l); | |
2298 | ||
2299 | STRV_FOREACH(i, c->environment_files) { | |
2300 | char *fn; | |
2301 | int k; | |
2302 | bool ignore = false; | |
2303 | char **p; | |
7fd1b19b | 2304 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 2305 | int count, n; |
8c7be95e LP |
2306 | |
2307 | fn = *i; | |
2308 | ||
2309 | if (fn[0] == '-') { | |
2310 | ignore = true; | |
2311 | fn ++; | |
2312 | } | |
2313 | ||
2314 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
2315 | if (ignore) |
2316 | continue; | |
2317 | ||
2318 | strv_free(r); | |
2319 | return -EINVAL; | |
2320 | } | |
2321 | ||
2bef10ab | 2322 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
2323 | errno = 0; |
2324 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
2325 | if (ignore) |
2326 | continue; | |
8c7be95e | 2327 | |
2bef10ab | 2328 | strv_free(r); |
f5e5c28f | 2329 | return errno > 0 ? -errno : -EINVAL; |
2bef10ab PL |
2330 | } |
2331 | count = pglob.gl_pathc; | |
2332 | if (count == 0) { | |
8c7be95e LP |
2333 | if (ignore) |
2334 | continue; | |
2335 | ||
2336 | strv_free(r); | |
2bef10ab | 2337 | return -EINVAL; |
8c7be95e | 2338 | } |
2bef10ab | 2339 | for (n = 0; n < count; n++) { |
717603e3 | 2340 | k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
2341 | if (k < 0) { |
2342 | if (ignore) | |
2343 | continue; | |
8c7be95e | 2344 | |
2bef10ab | 2345 | strv_free(r); |
2bef10ab | 2346 | return k; |
e9c1ea9d | 2347 | } |
ebc05a09 | 2348 | /* Log invalid environment variables with filename */ |
039f0e70 LP |
2349 | if (p) { |
2350 | InvalidEnvInfo info = { | |
f2341e0a | 2351 | .unit = unit, |
039f0e70 LP |
2352 | .path = pglob.gl_pathv[n] |
2353 | }; | |
2354 | ||
2355 | p = strv_env_clean_with_callback(p, invalid_env, &info); | |
2356 | } | |
8c7be95e | 2357 | |
2bef10ab PL |
2358 | if (r == NULL) |
2359 | r = p; | |
2360 | else { | |
2361 | char **m; | |
8c7be95e | 2362 | |
2bef10ab PL |
2363 | m = strv_env_merge(2, r, p); |
2364 | strv_free(r); | |
2365 | strv_free(p); | |
c84a9488 | 2366 | if (!m) |
2bef10ab | 2367 | return -ENOMEM; |
2bef10ab PL |
2368 | |
2369 | r = m; | |
2370 | } | |
8c7be95e LP |
2371 | } |
2372 | } | |
2373 | ||
2374 | *l = r; | |
2375 | ||
2376 | return 0; | |
2377 | } | |
2378 | ||
6ac8fdc9 | 2379 | static bool tty_may_match_dev_console(const char *tty) { |
e1d75803 | 2380 | _cleanup_free_ char *active = NULL; |
7d6884b6 | 2381 | char *console; |
6ac8fdc9 | 2382 | |
1e22b5cd LP |
2383 | if (!tty) |
2384 | return true; | |
2385 | ||
6ac8fdc9 MS |
2386 | if (startswith(tty, "/dev/")) |
2387 | tty += 5; | |
2388 | ||
2389 | /* trivial identity? */ | |
2390 | if (streq(tty, "console")) | |
2391 | return true; | |
2392 | ||
2393 | console = resolve_dev_console(&active); | |
2394 | /* if we could not resolve, assume it may */ | |
2395 | if (!console) | |
2396 | return true; | |
2397 | ||
2398 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
e1d75803 | 2399 | return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
2400 | } |
2401 | ||
2402 | bool exec_context_may_touch_console(ExecContext *ec) { | |
1e22b5cd LP |
2403 | |
2404 | return (ec->tty_reset || | |
2405 | ec->tty_vhangup || | |
2406 | ec->tty_vt_disallocate || | |
6ac8fdc9 MS |
2407 | is_terminal_input(ec->std_input) || |
2408 | is_terminal_output(ec->std_output) || | |
2409 | is_terminal_output(ec->std_error)) && | |
1e22b5cd | 2410 | tty_may_match_dev_console(exec_context_tty_path(ec)); |
6ac8fdc9 MS |
2411 | } |
2412 | ||
15ae422b LP |
2413 | static void strv_fprintf(FILE *f, char **l) { |
2414 | char **g; | |
2415 | ||
2416 | assert(f); | |
2417 | ||
2418 | STRV_FOREACH(g, l) | |
2419 | fprintf(f, " %s", *g); | |
2420 | } | |
2421 | ||
5cb5a6ff | 2422 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
c2bbd90b | 2423 | char **e, **d; |
94f04347 | 2424 | unsigned i; |
9eba9da4 | 2425 | |
5cb5a6ff LP |
2426 | assert(c); |
2427 | assert(f); | |
2428 | ||
4ad49000 | 2429 | prefix = strempty(prefix); |
5cb5a6ff LP |
2430 | |
2431 | fprintf(f, | |
94f04347 LP |
2432 | "%sUMask: %04o\n" |
2433 | "%sWorkingDirectory: %s\n" | |
451a074f | 2434 | "%sRootDirectory: %s\n" |
15ae422b | 2435 | "%sNonBlocking: %s\n" |
64747e2d | 2436 | "%sPrivateTmp: %s\n" |
4819ff03 | 2437 | "%sPrivateNetwork: %s\n" |
7f112f50 | 2438 | "%sPrivateDevices: %s\n" |
1b8689f9 LP |
2439 | "%sProtectHome: %s\n" |
2440 | "%sProtectSystem: %s\n" | |
3bb07b76 | 2441 | "%sIgnoreSIGPIPE: %s\n", |
5cb5a6ff | 2442 | prefix, c->umask, |
9eba9da4 | 2443 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 2444 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 2445 | prefix, yes_no(c->non_blocking), |
64747e2d | 2446 | prefix, yes_no(c->private_tmp), |
4819ff03 | 2447 | prefix, yes_no(c->private_network), |
7f112f50 | 2448 | prefix, yes_no(c->private_devices), |
1b8689f9 LP |
2449 | prefix, protect_home_to_string(c->protect_home), |
2450 | prefix, protect_system_to_string(c->protect_system), | |
3bb07b76 | 2451 | prefix, yes_no(c->ignore_sigpipe)); |
fb33a393 | 2452 | |
8c7be95e LP |
2453 | STRV_FOREACH(e, c->environment) |
2454 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
2455 | ||
2456 | STRV_FOREACH(e, c->environment_files) | |
2457 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 2458 | |
b4c14404 FB |
2459 | STRV_FOREACH(e, c->pass_environment) |
2460 | fprintf(f, "%sPassEnvironment: %s\n", prefix, *e); | |
2461 | ||
c2bbd90b EV |
2462 | fprintf(f, "%sRuntimeDirectoryMode: %04o\n", prefix, c->runtime_directory_mode); |
2463 | ||
2464 | STRV_FOREACH(d, c->runtime_directory) | |
2465 | fprintf(f, "%sRuntimeDirectory: %s\n", prefix, *d); | |
2466 | ||
fb33a393 LP |
2467 | if (c->nice_set) |
2468 | fprintf(f, | |
2469 | "%sNice: %i\n", | |
2470 | prefix, c->nice); | |
2471 | ||
dd6c17b1 | 2472 | if (c->oom_score_adjust_set) |
fb33a393 | 2473 | fprintf(f, |
dd6c17b1 LP |
2474 | "%sOOMScoreAdjust: %i\n", |
2475 | prefix, c->oom_score_adjust); | |
9eba9da4 | 2476 | |
94f04347 | 2477 | for (i = 0; i < RLIM_NLIMITS; i++) |
3c11da9d EV |
2478 | if (c->rlimit[i]) { |
2479 | fprintf(f, "%s%s: " RLIM_FMT "\n", | |
2480 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); | |
2481 | fprintf(f, "%s%sSoft: " RLIM_FMT "\n", | |
2482 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_cur); | |
2483 | } | |
94f04347 | 2484 | |
f8b69d1d | 2485 | if (c->ioprio_set) { |
1756a011 | 2486 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 2487 | |
1756a011 | 2488 | ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); |
9eba9da4 LP |
2489 | fprintf(f, |
2490 | "%sIOSchedulingClass: %s\n" | |
2491 | "%sIOPriority: %i\n", | |
f8b69d1d | 2492 | prefix, strna(class_str), |
9eba9da4 | 2493 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d | 2494 | } |
94f04347 | 2495 | |
f8b69d1d | 2496 | if (c->cpu_sched_set) { |
1756a011 | 2497 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 2498 | |
1756a011 | 2499 | sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
94f04347 LP |
2500 | fprintf(f, |
2501 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
2502 | "%sCPUSchedulingPriority: %i\n" |
2503 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 2504 | prefix, strna(policy_str), |
38b48754 LP |
2505 | prefix, c->cpu_sched_priority, |
2506 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 2507 | } |
94f04347 | 2508 | |
82c121a4 | 2509 | if (c->cpuset) { |
94f04347 | 2510 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
2511 | for (i = 0; i < c->cpuset_ncpus; i++) |
2512 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
43a99a7a | 2513 | fprintf(f, " %u", i); |
94f04347 LP |
2514 | fputs("\n", f); |
2515 | } | |
2516 | ||
3a43da28 | 2517 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 2518 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
2519 | |
2520 | fprintf(f, | |
80876c20 LP |
2521 | "%sStandardInput: %s\n" |
2522 | "%sStandardOutput: %s\n" | |
2523 | "%sStandardError: %s\n", | |
2524 | prefix, exec_input_to_string(c->std_input), | |
2525 | prefix, exec_output_to_string(c->std_output), | |
2526 | prefix, exec_output_to_string(c->std_error)); | |
2527 | ||
2528 | if (c->tty_path) | |
2529 | fprintf(f, | |
6ea832a2 LP |
2530 | "%sTTYPath: %s\n" |
2531 | "%sTTYReset: %s\n" | |
2532 | "%sTTYVHangup: %s\n" | |
2533 | "%sTTYVTDisallocate: %s\n", | |
2534 | prefix, c->tty_path, | |
2535 | prefix, yes_no(c->tty_reset), | |
2536 | prefix, yes_no(c->tty_vhangup), | |
2537 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 2538 | |
5ce70e5b ZJS |
2539 | if (c->std_output == EXEC_OUTPUT_SYSLOG || |
2540 | c->std_output == EXEC_OUTPUT_KMSG || | |
2541 | c->std_output == EXEC_OUTPUT_JOURNAL || | |
2542 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2543 | c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2544 | c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
2545 | c->std_error == EXEC_OUTPUT_SYSLOG || | |
2546 | c->std_error == EXEC_OUTPUT_KMSG || | |
2547 | c->std_error == EXEC_OUTPUT_JOURNAL || | |
2548 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2549 | c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2550 | c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { | |
f8b69d1d | 2551 | |
5ce70e5b | 2552 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 2553 | |
5ce70e5b ZJS |
2554 | log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
2555 | log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
f8b69d1d | 2556 | |
94f04347 LP |
2557 | fprintf(f, |
2558 | "%sSyslogFacility: %s\n" | |
2559 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
2560 | prefix, strna(fac_str), |
2561 | prefix, strna(lvl_str)); | |
f8b69d1d | 2562 | } |
94f04347 LP |
2563 | |
2564 | if (c->capabilities) { | |
5ce70e5b ZJS |
2565 | _cleanup_cap_free_charp_ char *t; |
2566 | ||
2567 | t = cap_to_text(c->capabilities, NULL); | |
2568 | if (t) | |
2569 | fprintf(f, "%sCapabilities: %s\n", prefix, t); | |
94f04347 LP |
2570 | } |
2571 | ||
2572 | if (c->secure_bits) | |
2573 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
2574 | prefix, | |
cbb21cca ZJS |
2575 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
2576 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
2577 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
2578 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
2579 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
2580 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 | 2581 | |
a103496c | 2582 | if (c->capability_bounding_set != CAP_ALL) { |
ae556c21 | 2583 | unsigned long l; |
260abb78 | 2584 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2585 | |
64685e0c | 2586 | for (l = 0; l <= cap_last_cap(); l++) |
a103496c | 2587 | if (c->capability_bounding_set & (UINT64_C(1) << l)) |
2822da4f | 2588 | fprintf(f, " %s", strna(capability_to_name(l))); |
94f04347 LP |
2589 | |
2590 | fputs("\n", f); | |
755d4b67 IP |
2591 | } |
2592 | ||
2593 | if (c->capability_ambient_set != 0) { | |
2594 | unsigned long l; | |
2595 | fprintf(f, "%sAmbientCapabilities:", prefix); | |
2596 | ||
2597 | for (l = 0; l <= cap_last_cap(); l++) | |
2598 | if (c->capability_ambient_set & (UINT64_C(1) << l)) | |
2599 | fprintf(f, " %s", strna(capability_to_name(l))); | |
2600 | ||
2601 | fputs("\n", f); | |
94f04347 LP |
2602 | } |
2603 | ||
2604 | if (c->user) | |
f2d3769a | 2605 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2606 | if (c->group) |
f2d3769a | 2607 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2608 | |
15ae422b | 2609 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2610 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2611 | strv_fprintf(f, c->supplementary_groups); |
2612 | fputs("\n", f); | |
2613 | } | |
94f04347 | 2614 | |
5b6319dc | 2615 | if (c->pam_name) |
f2d3769a | 2616 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2617 | |
15ae422b LP |
2618 | if (strv_length(c->read_write_dirs) > 0) { |
2619 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2620 | strv_fprintf(f, c->read_write_dirs); | |
2621 | fputs("\n", f); | |
2622 | } | |
2623 | ||
2624 | if (strv_length(c->read_only_dirs) > 0) { | |
2625 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2626 | strv_fprintf(f, c->read_only_dirs); | |
2627 | fputs("\n", f); | |
2628 | } | |
94f04347 | 2629 | |
15ae422b LP |
2630 | if (strv_length(c->inaccessible_dirs) > 0) { |
2631 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2632 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2633 | fputs("\n", f); |
2634 | } | |
2e22afe9 | 2635 | |
169c1bda LP |
2636 | if (c->utmp_id) |
2637 | fprintf(f, | |
2638 | "%sUtmpIdentifier: %s\n", | |
2639 | prefix, c->utmp_id); | |
7b52a628 MS |
2640 | |
2641 | if (c->selinux_context) | |
2642 | fprintf(f, | |
5f8640fb LP |
2643 | "%sSELinuxContext: %s%s\n", |
2644 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 2645 | |
050f7277 | 2646 | if (c->personality != PERSONALITY_INVALID) |
ac45f971 LP |
2647 | fprintf(f, |
2648 | "%sPersonality: %s\n", | |
2649 | prefix, strna(personality_to_string(c->personality))); | |
2650 | ||
17df7223 | 2651 | if (c->syscall_filter) { |
351a19b1 | 2652 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2653 | Iterator j; |
2654 | void *id; | |
2655 | bool first = true; | |
351a19b1 | 2656 | #endif |
17df7223 LP |
2657 | |
2658 | fprintf(f, | |
57183d11 | 2659 | "%sSystemCallFilter: ", |
17df7223 LP |
2660 | prefix); |
2661 | ||
2662 | if (!c->syscall_whitelist) | |
2663 | fputc('~', f); | |
2664 | ||
351a19b1 | 2665 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2666 | SET_FOREACH(id, c->syscall_filter, j) { |
2667 | _cleanup_free_ char *name = NULL; | |
2668 | ||
2669 | if (first) | |
2670 | first = false; | |
2671 | else | |
2672 | fputc(' ', f); | |
2673 | ||
57183d11 | 2674 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 LP |
2675 | fputs(strna(name), f); |
2676 | } | |
351a19b1 | 2677 | #endif |
17df7223 LP |
2678 | |
2679 | fputc('\n', f); | |
2680 | } | |
2681 | ||
57183d11 LP |
2682 | if (c->syscall_archs) { |
2683 | #ifdef HAVE_SECCOMP | |
2684 | Iterator j; | |
2685 | void *id; | |
2686 | #endif | |
2687 | ||
2688 | fprintf(f, | |
2689 | "%sSystemCallArchitectures:", | |
2690 | prefix); | |
2691 | ||
2692 | #ifdef HAVE_SECCOMP | |
2693 | SET_FOREACH(id, c->syscall_archs, j) | |
2694 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); | |
2695 | #endif | |
2696 | fputc('\n', f); | |
2697 | } | |
2698 | ||
b3267152 | 2699 | if (c->syscall_errno > 0) |
17df7223 LP |
2700 | fprintf(f, |
2701 | "%sSystemCallErrorNumber: %s\n", | |
2702 | prefix, strna(errno_to_name(c->syscall_errno))); | |
eef65bf3 MS |
2703 | |
2704 | if (c->apparmor_profile) | |
2705 | fprintf(f, | |
2706 | "%sAppArmorProfile: %s%s\n", | |
2707 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
5cb5a6ff LP |
2708 | } |
2709 | ||
a931ad47 LP |
2710 | bool exec_context_maintains_privileges(ExecContext *c) { |
2711 | assert(c); | |
2712 | ||
2713 | /* Returns true if the process forked off would run run under | |
2714 | * an unchanged UID or as root. */ | |
2715 | ||
2716 | if (!c->user) | |
2717 | return true; | |
2718 | ||
2719 | if (streq(c->user, "root") || streq(c->user, "0")) | |
2720 | return true; | |
2721 | ||
2722 | return false; | |
2723 | } | |
2724 | ||
b58b4116 | 2725 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2726 | assert(s); |
5cb5a6ff | 2727 | |
b58b4116 LP |
2728 | zero(*s); |
2729 | s->pid = pid; | |
2730 | dual_timestamp_get(&s->start_timestamp); | |
2731 | } | |
2732 | ||
6ea832a2 | 2733 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2734 | assert(s); |
2735 | ||
0b1f4ae6 | 2736 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2737 | zero(*s); |
2738 | ||
034c6ed7 | 2739 | s->pid = pid; |
63983207 | 2740 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2741 | |
034c6ed7 LP |
2742 | s->code = code; |
2743 | s->status = status; | |
169c1bda | 2744 | |
6ea832a2 LP |
2745 | if (context) { |
2746 | if (context->utmp_id) | |
2747 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2748 | ||
1e22b5cd | 2749 | exec_context_tty_reset(context, NULL); |
6ea832a2 | 2750 | } |
9fb86720 LP |
2751 | } |
2752 | ||
2753 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2754 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2755 | ||
2756 | assert(s); | |
2757 | assert(f); | |
2758 | ||
9fb86720 LP |
2759 | if (s->pid <= 0) |
2760 | return; | |
2761 | ||
4c940960 LP |
2762 | prefix = strempty(prefix); |
2763 | ||
9fb86720 | 2764 | fprintf(f, |
ccd06097 ZJS |
2765 | "%sPID: "PID_FMT"\n", |
2766 | prefix, s->pid); | |
9fb86720 | 2767 | |
63983207 | 2768 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2769 | fprintf(f, |
2770 | "%sStart Timestamp: %s\n", | |
63983207 | 2771 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2772 | |
63983207 | 2773 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2774 | fprintf(f, |
2775 | "%sExit Timestamp: %s\n" | |
2776 | "%sExit Code: %s\n" | |
2777 | "%sExit Status: %i\n", | |
63983207 | 2778 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2779 | prefix, sigchld_code_to_string(s->code), |
2780 | prefix, s->status); | |
5cb5a6ff | 2781 | } |
44d8db9e | 2782 | |
9e2f7c11 | 2783 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2784 | size_t k; |
2785 | char *n, *p, **a; | |
2786 | bool first = true; | |
2787 | ||
9e2f7c11 | 2788 | assert(argv); |
44d8db9e | 2789 | |
9164977d | 2790 | k = 1; |
9e2f7c11 | 2791 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2792 | k += strlen(*a)+3; |
2793 | ||
2794 | if (!(n = new(char, k))) | |
2795 | return NULL; | |
2796 | ||
2797 | p = n; | |
9e2f7c11 | 2798 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2799 | |
2800 | if (!first) | |
2801 | *(p++) = ' '; | |
2802 | else | |
2803 | first = false; | |
2804 | ||
2805 | if (strpbrk(*a, WHITESPACE)) { | |
2806 | *(p++) = '\''; | |
2807 | p = stpcpy(p, *a); | |
2808 | *(p++) = '\''; | |
2809 | } else | |
2810 | p = stpcpy(p, *a); | |
2811 | ||
2812 | } | |
2813 | ||
9164977d LP |
2814 | *p = 0; |
2815 | ||
44d8db9e LP |
2816 | /* FIXME: this doesn't really handle arguments that have |
2817 | * spaces and ticks in them */ | |
2818 | ||
2819 | return n; | |
2820 | } | |
2821 | ||
2822 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
e1d75803 | 2823 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 2824 | const char *prefix2; |
44d8db9e LP |
2825 | |
2826 | assert(c); | |
2827 | assert(f); | |
2828 | ||
4c940960 | 2829 | prefix = strempty(prefix); |
63c372cb | 2830 | prefix2 = strjoina(prefix, "\t"); |
44d8db9e | 2831 | |
9e2f7c11 | 2832 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2833 | fprintf(f, |
2834 | "%sCommand Line: %s\n", | |
2835 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2836 | ||
9fb86720 | 2837 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
2838 | } |
2839 | ||
2840 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2841 | assert(f); | |
2842 | ||
4c940960 | 2843 | prefix = strempty(prefix); |
44d8db9e LP |
2844 | |
2845 | LIST_FOREACH(command, c, c) | |
2846 | exec_command_dump(c, f, prefix); | |
2847 | } | |
94f04347 | 2848 | |
a6a80b4f LP |
2849 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2850 | ExecCommand *end; | |
2851 | ||
2852 | assert(l); | |
2853 | assert(e); | |
2854 | ||
2855 | if (*l) { | |
35b8ca3a | 2856 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2857 | LIST_FIND_TAIL(command, *l, end); |
2858 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2859 | } else |
2860 | *l = e; | |
2861 | } | |
2862 | ||
26fd040d LP |
2863 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2864 | va_list ap; | |
2865 | char **l, *p; | |
2866 | ||
2867 | assert(c); | |
2868 | assert(path); | |
2869 | ||
2870 | va_start(ap, path); | |
2871 | l = strv_new_ap(path, ap); | |
2872 | va_end(ap); | |
2873 | ||
2874 | if (!l) | |
2875 | return -ENOMEM; | |
2876 | ||
250a918d LP |
2877 | p = strdup(path); |
2878 | if (!p) { | |
26fd040d LP |
2879 | strv_free(l); |
2880 | return -ENOMEM; | |
2881 | } | |
2882 | ||
2883 | free(c->path); | |
2884 | c->path = p; | |
2885 | ||
2886 | strv_free(c->argv); | |
2887 | c->argv = l; | |
2888 | ||
2889 | return 0; | |
2890 | } | |
2891 | ||
86b23b07 | 2892 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 2893 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 2894 | va_list ap; |
86b23b07 JS |
2895 | int r; |
2896 | ||
2897 | assert(c); | |
2898 | assert(path); | |
2899 | ||
2900 | va_start(ap, path); | |
2901 | l = strv_new_ap(path, ap); | |
2902 | va_end(ap); | |
2903 | ||
2904 | if (!l) | |
2905 | return -ENOMEM; | |
2906 | ||
e287086b | 2907 | r = strv_extend_strv(&c->argv, l, false); |
e63ff941 | 2908 | if (r < 0) |
86b23b07 | 2909 | return r; |
86b23b07 JS |
2910 | |
2911 | return 0; | |
2912 | } | |
2913 | ||
2914 | ||
613b411c LP |
2915 | static int exec_runtime_allocate(ExecRuntime **rt) { |
2916 | ||
2917 | if (*rt) | |
2918 | return 0; | |
2919 | ||
2920 | *rt = new0(ExecRuntime, 1); | |
f146f5e1 | 2921 | if (!*rt) |
613b411c LP |
2922 | return -ENOMEM; |
2923 | ||
2924 | (*rt)->n_ref = 1; | |
2925 | (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1; | |
2926 | ||
2927 | return 0; | |
2928 | } | |
2929 | ||
2930 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) { | |
2931 | int r; | |
2932 | ||
2933 | assert(rt); | |
2934 | assert(c); | |
2935 | assert(id); | |
2936 | ||
2937 | if (*rt) | |
2938 | return 1; | |
2939 | ||
2940 | if (!c->private_network && !c->private_tmp) | |
2941 | return 0; | |
2942 | ||
2943 | r = exec_runtime_allocate(rt); | |
2944 | if (r < 0) | |
2945 | return r; | |
2946 | ||
2947 | if (c->private_network && (*rt)->netns_storage_socket[0] < 0) { | |
2948 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0) | |
2949 | return -errno; | |
2950 | } | |
2951 | ||
2952 | if (c->private_tmp && !(*rt)->tmp_dir) { | |
2953 | r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir); | |
2954 | if (r < 0) | |
2955 | return r; | |
2956 | } | |
2957 | ||
2958 | return 1; | |
2959 | } | |
2960 | ||
2961 | ExecRuntime *exec_runtime_ref(ExecRuntime *r) { | |
2962 | assert(r); | |
2963 | assert(r->n_ref > 0); | |
2964 | ||
2965 | r->n_ref++; | |
2966 | return r; | |
2967 | } | |
2968 | ||
2969 | ExecRuntime *exec_runtime_unref(ExecRuntime *r) { | |
2970 | ||
2971 | if (!r) | |
2972 | return NULL; | |
2973 | ||
2974 | assert(r->n_ref > 0); | |
2975 | ||
2976 | r->n_ref--; | |
f2341e0a LP |
2977 | if (r->n_ref > 0) |
2978 | return NULL; | |
2979 | ||
2980 | free(r->tmp_dir); | |
2981 | free(r->var_tmp_dir); | |
2982 | safe_close_pair(r->netns_storage_socket); | |
2983 | free(r); | |
613b411c LP |
2984 | |
2985 | return NULL; | |
2986 | } | |
2987 | ||
f2341e0a | 2988 | int exec_runtime_serialize(Unit *u, ExecRuntime *rt, FILE *f, FDSet *fds) { |
613b411c LP |
2989 | assert(u); |
2990 | assert(f); | |
2991 | assert(fds); | |
2992 | ||
2993 | if (!rt) | |
2994 | return 0; | |
2995 | ||
2996 | if (rt->tmp_dir) | |
2997 | unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir); | |
2998 | ||
2999 | if (rt->var_tmp_dir) | |
3000 | unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir); | |
3001 | ||
3002 | if (rt->netns_storage_socket[0] >= 0) { | |
3003 | int copy; | |
3004 | ||
3005 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); | |
3006 | if (copy < 0) | |
3007 | return copy; | |
3008 | ||
3009 | unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy); | |
3010 | } | |
3011 | ||
3012 | if (rt->netns_storage_socket[1] >= 0) { | |
3013 | int copy; | |
3014 | ||
3015 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); | |
3016 | if (copy < 0) | |
3017 | return copy; | |
3018 | ||
3019 | unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy); | |
3020 | } | |
3021 | ||
3022 | return 0; | |
3023 | } | |
3024 | ||
f2341e0a | 3025 | int exec_runtime_deserialize_item(Unit *u, ExecRuntime **rt, const char *key, const char *value, FDSet *fds) { |
613b411c LP |
3026 | int r; |
3027 | ||
3028 | assert(rt); | |
3029 | assert(key); | |
3030 | assert(value); | |
3031 | ||
3032 | if (streq(key, "tmp-dir")) { | |
3033 | char *copy; | |
3034 | ||
3035 | r = exec_runtime_allocate(rt); | |
3036 | if (r < 0) | |
f2341e0a | 3037 | return log_oom(); |
613b411c LP |
3038 | |
3039 | copy = strdup(value); | |
3040 | if (!copy) | |
3041 | return log_oom(); | |
3042 | ||
3043 | free((*rt)->tmp_dir); | |
3044 | (*rt)->tmp_dir = copy; | |
3045 | ||
3046 | } else if (streq(key, "var-tmp-dir")) { | |
3047 | char *copy; | |
3048 | ||
3049 | r = exec_runtime_allocate(rt); | |
3050 | if (r < 0) | |
f2341e0a | 3051 | return log_oom(); |
613b411c LP |
3052 | |
3053 | copy = strdup(value); | |
3054 | if (!copy) | |
3055 | return log_oom(); | |
3056 | ||
3057 | free((*rt)->var_tmp_dir); | |
3058 | (*rt)->var_tmp_dir = copy; | |
3059 | ||
3060 | } else if (streq(key, "netns-socket-0")) { | |
3061 | int fd; | |
3062 | ||
3063 | r = exec_runtime_allocate(rt); | |
3064 | if (r < 0) | |
f2341e0a | 3065 | return log_oom(); |
613b411c LP |
3066 | |
3067 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 3068 | log_unit_debug(u, "Failed to parse netns socket value: %s", value); |
613b411c | 3069 | else { |
03e334a1 | 3070 | safe_close((*rt)->netns_storage_socket[0]); |
613b411c LP |
3071 | (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd); |
3072 | } | |
3073 | } else if (streq(key, "netns-socket-1")) { | |
3074 | int fd; | |
3075 | ||
3076 | r = exec_runtime_allocate(rt); | |
3077 | if (r < 0) | |
f2341e0a | 3078 | return log_oom(); |
613b411c LP |
3079 | |
3080 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 3081 | log_unit_debug(u, "Failed to parse netns socket value: %s", value); |
613b411c | 3082 | else { |
03e334a1 | 3083 | safe_close((*rt)->netns_storage_socket[1]); |
613b411c LP |
3084 | (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd); |
3085 | } | |
3086 | } else | |
3087 | return 0; | |
3088 | ||
3089 | return 1; | |
3090 | } | |
3091 | ||
3092 | static void *remove_tmpdir_thread(void *p) { | |
3093 | _cleanup_free_ char *path = p; | |
3094 | ||
c6878637 | 3095 | (void) rm_rf(path, REMOVE_ROOT|REMOVE_PHYSICAL); |
613b411c LP |
3096 | return NULL; |
3097 | } | |
3098 | ||
3099 | void exec_runtime_destroy(ExecRuntime *rt) { | |
98b47d54 LP |
3100 | int r; |
3101 | ||
613b411c LP |
3102 | if (!rt) |
3103 | return; | |
3104 | ||
3105 | /* If there are multiple users of this, let's leave the stuff around */ | |
3106 | if (rt->n_ref > 1) | |
3107 | return; | |
3108 | ||
3109 | if (rt->tmp_dir) { | |
3110 | log_debug("Spawning thread to nuke %s", rt->tmp_dir); | |
98b47d54 LP |
3111 | |
3112 | r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir); | |
3113 | if (r < 0) { | |
da927ba9 | 3114 | log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir); |
98b47d54 LP |
3115 | free(rt->tmp_dir); |
3116 | } | |
3117 | ||
613b411c LP |
3118 | rt->tmp_dir = NULL; |
3119 | } | |
3120 | ||
3121 | if (rt->var_tmp_dir) { | |
3122 | log_debug("Spawning thread to nuke %s", rt->var_tmp_dir); | |
98b47d54 LP |
3123 | |
3124 | r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir); | |
3125 | if (r < 0) { | |
da927ba9 | 3126 | log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir); |
98b47d54 LP |
3127 | free(rt->var_tmp_dir); |
3128 | } | |
3129 | ||
613b411c LP |
3130 | rt->var_tmp_dir = NULL; |
3131 | } | |
3132 | ||
3d94f76c | 3133 | safe_close_pair(rt->netns_storage_socket); |
613b411c LP |
3134 | } |
3135 | ||
80876c20 LP |
3136 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
3137 | [EXEC_INPUT_NULL] = "null", | |
3138 | [EXEC_INPUT_TTY] = "tty", | |
3139 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
3140 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
3141 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
3142 | }; |
3143 | ||
8a0867d6 LP |
3144 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
3145 | ||
94f04347 | 3146 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 3147 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 3148 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 3149 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 3150 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 3151 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 3152 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 3153 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
3154 | [EXEC_OUTPUT_JOURNAL] = "journal", |
3155 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 3156 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
3157 | }; |
3158 | ||
3159 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); | |
023a4f67 LP |
3160 | |
3161 | static const char* const exec_utmp_mode_table[_EXEC_UTMP_MODE_MAX] = { | |
3162 | [EXEC_UTMP_INIT] = "init", | |
3163 | [EXEC_UTMP_LOGIN] = "login", | |
3164 | [EXEC_UTMP_USER] = "user", | |
3165 | }; | |
3166 | ||
3167 | DEFINE_STRING_TABLE_LOOKUP(exec_utmp_mode, ExecUtmpMode); |