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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 | ||
44a6b1b6 | 186 | _pure_ static const char *tty_path(const ExecContext *context) { |
80876c20 LP |
187 | assert(context); |
188 | ||
189 | if (context->tty_path) | |
190 | return context->tty_path; | |
191 | ||
192 | return "/dev/console"; | |
193 | } | |
194 | ||
9588bc32 | 195 | static void exec_context_tty_reset(const ExecContext *context) { |
6ea832a2 LP |
196 | assert(context); |
197 | ||
198 | if (context->tty_vhangup) | |
199 | terminal_vhangup(tty_path(context)); | |
200 | ||
201 | if (context->tty_reset) | |
202 | reset_terminal(tty_path(context)); | |
203 | ||
204 | if (context->tty_vt_disallocate && context->tty_path) | |
205 | vt_disallocate(context->tty_path); | |
206 | } | |
207 | ||
3a1286b6 MS |
208 | static bool is_terminal_output(ExecOutput o) { |
209 | return | |
210 | o == EXEC_OUTPUT_TTY || | |
211 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
212 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
213 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
214 | } | |
215 | ||
80876c20 LP |
216 | static int open_null_as(int flags, int nfd) { |
217 | int fd, r; | |
071830ff | 218 | |
80876c20 | 219 | assert(nfd >= 0); |
071830ff | 220 | |
613b411c LP |
221 | fd = open("/dev/null", flags|O_NOCTTY); |
222 | if (fd < 0) | |
071830ff LP |
223 | return -errno; |
224 | ||
80876c20 LP |
225 | if (fd != nfd) { |
226 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 227 | safe_close(fd); |
80876c20 LP |
228 | } else |
229 | r = nfd; | |
071830ff | 230 | |
80876c20 | 231 | return r; |
071830ff LP |
232 | } |
233 | ||
524daa8c | 234 | static int connect_journal_socket(int fd, uid_t uid, gid_t gid) { |
b92bea5d ZJS |
235 | union sockaddr_union sa = { |
236 | .un.sun_family = AF_UNIX, | |
237 | .un.sun_path = "/run/systemd/journal/stdout", | |
238 | }; | |
524daa8c ZJS |
239 | uid_t olduid = UID_INVALID; |
240 | gid_t oldgid = GID_INVALID; | |
241 | int r; | |
242 | ||
243 | if (gid != GID_INVALID) { | |
244 | oldgid = getgid(); | |
245 | ||
246 | r = setegid(gid); | |
247 | if (r < 0) | |
248 | return -errno; | |
249 | } | |
250 | ||
251 | if (uid != UID_INVALID) { | |
252 | olduid = getuid(); | |
253 | ||
254 | r = seteuid(uid); | |
255 | if (r < 0) { | |
256 | r = -errno; | |
257 | goto restore_gid; | |
258 | } | |
259 | } | |
260 | ||
261 | r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); | |
262 | if (r < 0) | |
263 | r = -errno; | |
264 | ||
265 | /* If we fail to restore the uid or gid, things will likely | |
266 | fail later on. This should only happen if an LSM interferes. */ | |
267 | ||
268 | if (uid != UID_INVALID) | |
269 | (void) seteuid(olduid); | |
270 | ||
271 | restore_gid: | |
272 | if (gid != GID_INVALID) | |
273 | (void) setegid(oldgid); | |
274 | ||
275 | return r; | |
276 | } | |
277 | ||
278 | 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) { | |
279 | int fd, r; | |
071830ff LP |
280 | |
281 | assert(context); | |
80876c20 LP |
282 | assert(output < _EXEC_OUTPUT_MAX); |
283 | assert(ident); | |
284 | assert(nfd >= 0); | |
071830ff | 285 | |
54fe0cdb LP |
286 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
287 | if (fd < 0) | |
80876c20 | 288 | return -errno; |
071830ff | 289 | |
524daa8c ZJS |
290 | r = connect_journal_socket(fd, uid, gid); |
291 | if (r < 0) | |
292 | return r; | |
071830ff | 293 | |
80876c20 | 294 | if (shutdown(fd, SHUT_RD) < 0) { |
03e334a1 | 295 | safe_close(fd); |
80876c20 LP |
296 | return -errno; |
297 | } | |
071830ff | 298 | |
531dca78 LP |
299 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
300 | ||
80876c20 | 301 | dprintf(fd, |
62bca2c6 | 302 | "%s\n" |
80876c20 LP |
303 | "%s\n" |
304 | "%i\n" | |
54fe0cdb LP |
305 | "%i\n" |
306 | "%i\n" | |
307 | "%i\n" | |
4f4a1dbf | 308 | "%i\n", |
4f4a1dbf | 309 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 310 | unit_id, |
54fe0cdb LP |
311 | context->syslog_priority, |
312 | !!context->syslog_level_prefix, | |
313 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
314 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 315 | is_terminal_output(output)); |
80876c20 LP |
316 | |
317 | if (fd != nfd) { | |
318 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 319 | safe_close(fd); |
80876c20 LP |
320 | } else |
321 | r = nfd; | |
071830ff | 322 | |
80876c20 LP |
323 | return r; |
324 | } | |
325 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
326 | int fd, r; | |
071830ff | 327 | |
80876c20 LP |
328 | assert(path); |
329 | assert(nfd >= 0); | |
071830ff | 330 | |
3cc2aff1 LP |
331 | fd = open_terminal(path, mode | O_NOCTTY); |
332 | if (fd < 0) | |
80876c20 | 333 | return fd; |
071830ff | 334 | |
80876c20 LP |
335 | if (fd != nfd) { |
336 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 337 | safe_close(fd); |
80876c20 LP |
338 | } else |
339 | r = nfd; | |
071830ff | 340 | |
80876c20 LP |
341 | return r; |
342 | } | |
071830ff | 343 | |
80876c20 LP |
344 | static bool is_terminal_input(ExecInput i) { |
345 | return | |
346 | i == EXEC_INPUT_TTY || | |
347 | i == EXEC_INPUT_TTY_FORCE || | |
348 | i == EXEC_INPUT_TTY_FAIL; | |
349 | } | |
071830ff | 350 | |
1e3ad081 LP |
351 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
352 | ||
353 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
354 | return EXEC_INPUT_NULL; | |
071830ff | 355 | |
03fd9c49 | 356 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
357 | return EXEC_INPUT_NULL; |
358 | ||
03fd9c49 | 359 | return std_input; |
4f2d528d LP |
360 | } |
361 | ||
03fd9c49 | 362 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 363 | |
03fd9c49 | 364 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
365 | return EXEC_OUTPUT_INHERIT; |
366 | ||
03fd9c49 | 367 | return std_output; |
4f2d528d LP |
368 | } |
369 | ||
a34ceba6 LP |
370 | static int setup_input( |
371 | const ExecContext *context, | |
372 | const ExecParameters *params, | |
373 | int socket_fd) { | |
374 | ||
4f2d528d LP |
375 | ExecInput i; |
376 | ||
377 | assert(context); | |
a34ceba6 LP |
378 | assert(params); |
379 | ||
380 | if (params->stdin_fd >= 0) { | |
381 | if (dup2(params->stdin_fd, STDIN_FILENO) < 0) | |
382 | return -errno; | |
383 | ||
384 | /* Try to make this the controlling tty, if it is a tty, and reset it */ | |
385 | (void) ioctl(STDIN_FILENO, TIOCSCTTY, context->std_input == EXEC_INPUT_TTY_FORCE); | |
386 | (void) reset_terminal_fd(STDIN_FILENO, true); | |
387 | ||
388 | return STDIN_FILENO; | |
389 | } | |
4f2d528d | 390 | |
a34ceba6 | 391 | i = fixup_input(context->std_input, socket_fd, params->apply_tty_stdin); |
4f2d528d LP |
392 | |
393 | switch (i) { | |
071830ff | 394 | |
80876c20 LP |
395 | case EXEC_INPUT_NULL: |
396 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
397 | ||
398 | case EXEC_INPUT_TTY: | |
399 | case EXEC_INPUT_TTY_FORCE: | |
400 | case EXEC_INPUT_TTY_FAIL: { | |
401 | int fd, r; | |
071830ff | 402 | |
970edce6 ZJS |
403 | fd = acquire_terminal(tty_path(context), |
404 | i == EXEC_INPUT_TTY_FAIL, | |
405 | i == EXEC_INPUT_TTY_FORCE, | |
406 | false, | |
3a43da28 | 407 | USEC_INFINITY); |
970edce6 | 408 | if (fd < 0) |
80876c20 LP |
409 | return fd; |
410 | ||
411 | if (fd != STDIN_FILENO) { | |
412 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
03e334a1 | 413 | safe_close(fd); |
80876c20 LP |
414 | } else |
415 | r = STDIN_FILENO; | |
416 | ||
417 | return r; | |
418 | } | |
419 | ||
4f2d528d LP |
420 | case EXEC_INPUT_SOCKET: |
421 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
422 | ||
80876c20 LP |
423 | default: |
424 | assert_not_reached("Unknown input type"); | |
425 | } | |
426 | } | |
427 | ||
a34ceba6 LP |
428 | static int setup_output( |
429 | Unit *unit, | |
430 | const ExecContext *context, | |
431 | const ExecParameters *params, | |
432 | int fileno, | |
433 | int socket_fd, | |
434 | const char *ident, | |
435 | uid_t uid, gid_t gid) { | |
436 | ||
4f2d528d LP |
437 | ExecOutput o; |
438 | ExecInput i; | |
47c1d80d | 439 | int r; |
4f2d528d | 440 | |
f2341e0a | 441 | assert(unit); |
80876c20 | 442 | assert(context); |
a34ceba6 | 443 | assert(params); |
80876c20 LP |
444 | assert(ident); |
445 | ||
a34ceba6 LP |
446 | if (fileno == STDOUT_FILENO && params->stdout_fd >= 0) { |
447 | ||
448 | if (dup2(params->stdout_fd, STDOUT_FILENO) < 0) | |
449 | return -errno; | |
450 | ||
451 | return STDOUT_FILENO; | |
452 | } | |
453 | ||
454 | if (fileno == STDERR_FILENO && params->stderr_fd >= 0) { | |
455 | if (dup2(params->stderr_fd, STDERR_FILENO) < 0) | |
456 | return -errno; | |
457 | ||
458 | return STDERR_FILENO; | |
459 | } | |
460 | ||
461 | i = fixup_input(context->std_input, socket_fd, params->apply_tty_stdin); | |
03fd9c49 | 462 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 463 | |
eb17e935 MS |
464 | if (fileno == STDERR_FILENO) { |
465 | ExecOutput e; | |
466 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 467 | |
eb17e935 MS |
468 | /* This expects the input and output are already set up */ |
469 | ||
470 | /* Don't change the stderr file descriptor if we inherit all | |
471 | * the way and are not on a tty */ | |
472 | if (e == EXEC_OUTPUT_INHERIT && | |
473 | o == EXEC_OUTPUT_INHERIT && | |
474 | i == EXEC_INPUT_NULL && | |
475 | !is_terminal_input(context->std_input) && | |
476 | getppid () != 1) | |
477 | return fileno; | |
478 | ||
479 | /* Duplicate from stdout if possible */ | |
480 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
481 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 482 | |
eb17e935 | 483 | o = e; |
80876c20 | 484 | |
eb17e935 | 485 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
486 | /* If input got downgraded, inherit the original value */ |
487 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
eb17e935 | 488 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 489 | |
acb591e4 | 490 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 491 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 492 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 493 | |
acb591e4 LP |
494 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
495 | if (getppid() != 1) | |
eb17e935 | 496 | return fileno; |
94f04347 | 497 | |
eb17e935 MS |
498 | /* We need to open /dev/null here anew, to get the right access mode. */ |
499 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 500 | } |
94f04347 | 501 | |
eb17e935 | 502 | switch (o) { |
80876c20 LP |
503 | |
504 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 505 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
506 | |
507 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 508 | if (is_terminal_input(i)) |
eb17e935 | 509 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
510 | |
511 | /* We don't reset the terminal if this is just about output */ | |
eb17e935 | 512 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
513 | |
514 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 515 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 516 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 517 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
518 | case EXEC_OUTPUT_JOURNAL: |
519 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
f2341e0a | 520 | r = connect_logger_as(context, o, ident, unit->id, fileno, uid, gid); |
47c1d80d | 521 | if (r < 0) { |
f2341e0a | 522 | log_unit_error_errno(unit, r, "Failed to connect %s to the journal socket, ignoring: %m", fileno == STDOUT_FILENO ? "stdout" : "stderr"); |
eb17e935 | 523 | r = open_null_as(O_WRONLY, fileno); |
47c1d80d MS |
524 | } |
525 | return r; | |
4f2d528d LP |
526 | |
527 | case EXEC_OUTPUT_SOCKET: | |
528 | assert(socket_fd >= 0); | |
eb17e935 | 529 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
530 | |
531 | default: | |
80876c20 | 532 | assert_not_reached("Unknown error type"); |
94f04347 | 533 | } |
071830ff LP |
534 | } |
535 | ||
02a51aba LP |
536 | static int chown_terminal(int fd, uid_t uid) { |
537 | struct stat st; | |
538 | ||
539 | assert(fd >= 0); | |
02a51aba LP |
540 | |
541 | /* This might fail. What matters are the results. */ | |
bab45044 LP |
542 | (void) fchown(fd, uid, -1); |
543 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
544 | |
545 | if (fstat(fd, &st) < 0) | |
546 | return -errno; | |
547 | ||
d8b4e2e9 | 548 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
549 | return -EPERM; |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
3d18b167 LP |
554 | static int setup_confirm_stdio(int *_saved_stdin, int *_saved_stdout) { |
555 | _cleanup_close_ int fd = -1, saved_stdin = -1, saved_stdout = -1; | |
556 | int r; | |
80876c20 | 557 | |
80876c20 LP |
558 | assert(_saved_stdin); |
559 | assert(_saved_stdout); | |
560 | ||
af6da548 LP |
561 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
562 | if (saved_stdin < 0) | |
563 | return -errno; | |
80876c20 | 564 | |
af6da548 | 565 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
3d18b167 LP |
566 | if (saved_stdout < 0) |
567 | return -errno; | |
80876c20 | 568 | |
af6da548 LP |
569 | fd = acquire_terminal( |
570 | "/dev/console", | |
571 | false, | |
572 | false, | |
573 | false, | |
574 | DEFAULT_CONFIRM_USEC); | |
3d18b167 LP |
575 | if (fd < 0) |
576 | return fd; | |
80876c20 | 577 | |
af6da548 LP |
578 | r = chown_terminal(fd, getuid()); |
579 | if (r < 0) | |
3d18b167 | 580 | return r; |
02a51aba | 581 | |
3d18b167 LP |
582 | r = reset_terminal_fd(fd, true); |
583 | if (r < 0) | |
584 | return r; | |
80876c20 | 585 | |
3d18b167 LP |
586 | if (dup2(fd, STDIN_FILENO) < 0) |
587 | return -errno; | |
588 | ||
589 | if (dup2(fd, STDOUT_FILENO) < 0) | |
590 | return -errno; | |
80876c20 LP |
591 | |
592 | if (fd >= 2) | |
03e334a1 | 593 | safe_close(fd); |
3d18b167 | 594 | fd = -1; |
80876c20 LP |
595 | |
596 | *_saved_stdin = saved_stdin; | |
597 | *_saved_stdout = saved_stdout; | |
598 | ||
3d18b167 | 599 | saved_stdin = saved_stdout = -1; |
80876c20 | 600 | |
3d18b167 | 601 | return 0; |
80876c20 LP |
602 | } |
603 | ||
44b601bc | 604 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
03e334a1 | 605 | _cleanup_close_ int fd = -1; |
af6da548 | 606 | va_list ap; |
80876c20 | 607 | |
af6da548 | 608 | assert(format); |
80876c20 | 609 | |
af6da548 LP |
610 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
611 | if (fd < 0) | |
612 | return fd; | |
80876c20 | 613 | |
af6da548 LP |
614 | va_start(ap, format); |
615 | vdprintf(fd, format, ap); | |
616 | va_end(ap); | |
80876c20 | 617 | |
af6da548 LP |
618 | return 0; |
619 | } | |
80876c20 | 620 | |
3d18b167 | 621 | static int restore_confirm_stdio(int *saved_stdin, int *saved_stdout) { |
af6da548 | 622 | int r = 0; |
80876c20 | 623 | |
af6da548 LP |
624 | assert(saved_stdin); |
625 | assert(saved_stdout); | |
626 | ||
627 | release_terminal(); | |
628 | ||
629 | if (*saved_stdin >= 0) | |
80876c20 | 630 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 631 | r = -errno; |
80876c20 | 632 | |
af6da548 | 633 | if (*saved_stdout >= 0) |
80876c20 | 634 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 635 | r = -errno; |
80876c20 | 636 | |
3d18b167 LP |
637 | *saved_stdin = safe_close(*saved_stdin); |
638 | *saved_stdout = safe_close(*saved_stdout); | |
af6da548 LP |
639 | |
640 | return r; | |
641 | } | |
642 | ||
643 | static int ask_for_confirmation(char *response, char **argv) { | |
644 | int saved_stdout = -1, saved_stdin = -1, r; | |
e1d75803 | 645 | _cleanup_free_ char *line = NULL; |
af6da548 LP |
646 | |
647 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
648 | if (r < 0) | |
649 | return r; | |
650 | ||
651 | line = exec_command_line(argv); | |
652 | if (!line) | |
653 | return -ENOMEM; | |
654 | ||
418b9be5 | 655 | r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line); |
af6da548 LP |
656 | |
657 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
658 | ||
659 | return r; | |
80876c20 LP |
660 | } |
661 | ||
81a2b7ce LP |
662 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
663 | bool keep_groups = false; | |
664 | int r; | |
665 | ||
666 | assert(context); | |
667 | ||
35b8ca3a | 668 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
669 | * we avoid NSS lookups for gid=0. */ |
670 | ||
671 | if (context->group || username) { | |
81a2b7ce LP |
672 | /* First step, initialize groups from /etc/groups */ |
673 | if (username && gid != 0) { | |
674 | if (initgroups(username, gid) < 0) | |
675 | return -errno; | |
676 | ||
677 | keep_groups = true; | |
678 | } | |
679 | ||
680 | /* Second step, set our gids */ | |
681 | if (setresgid(gid, gid, gid) < 0) | |
682 | return -errno; | |
683 | } | |
684 | ||
685 | if (context->supplementary_groups) { | |
686 | int ngroups_max, k; | |
687 | gid_t *gids; | |
688 | char **i; | |
689 | ||
690 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 691 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
692 | |
693 | if (!(gids = new(gid_t, ngroups_max))) | |
694 | return -ENOMEM; | |
695 | ||
696 | if (keep_groups) { | |
3cc2aff1 LP |
697 | k = getgroups(ngroups_max, gids); |
698 | if (k < 0) { | |
81a2b7ce LP |
699 | free(gids); |
700 | return -errno; | |
701 | } | |
702 | } else | |
703 | k = 0; | |
704 | ||
705 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 706 | const char *g; |
81a2b7ce LP |
707 | |
708 | if (k >= ngroups_max) { | |
709 | free(gids); | |
710 | return -E2BIG; | |
711 | } | |
712 | ||
4b67834e LP |
713 | g = *i; |
714 | r = get_group_creds(&g, gids+k); | |
715 | if (r < 0) { | |
81a2b7ce LP |
716 | free(gids); |
717 | return r; | |
718 | } | |
719 | ||
720 | k++; | |
721 | } | |
722 | ||
723 | if (setgroups(k, gids) < 0) { | |
724 | free(gids); | |
725 | return -errno; | |
726 | } | |
727 | ||
728 | free(gids); | |
729 | } | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
734 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
81a2b7ce LP |
735 | assert(context); |
736 | ||
737 | /* Sets (but doesn't lookup) the uid and make sure we keep the | |
738 | * capabilities while doing so. */ | |
739 | ||
755d4b67 | 740 | if (context->capabilities || context->capability_ambient_set != 0) { |
81a2b7ce LP |
741 | |
742 | /* First step: If we need to keep capabilities but | |
743 | * drop privileges we need to make sure we keep our | |
cbb21cca | 744 | * caps, while we drop privileges. */ |
693ced48 | 745 | if (uid != 0) { |
cbb21cca | 746 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
747 | |
748 | if (prctl(PR_GET_SECUREBITS) != sb) | |
749 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
750 | return -errno; | |
751 | } | |
81a2b7ce | 752 | |
35b8ca3a | 753 | /* Second step: set the capabilities. This will reduce |
81a2b7ce LP |
754 | * the capabilities to the minimum we need. */ |
755 | ||
755d4b67 IP |
756 | if (context->capabilities) { |
757 | _cleanup_cap_free_ cap_t d = NULL; | |
758 | static const cap_value_t bits[] = { | |
759 | CAP_SETUID, /* Necessary so that we can run setresuid() below */ | |
760 | CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */ | |
761 | }; | |
81a2b7ce | 762 | |
755d4b67 IP |
763 | d = cap_dup(context->capabilities); |
764 | if (!d) | |
765 | return -errno; | |
81a2b7ce | 766 | |
755d4b67 IP |
767 | if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 || |
768 | cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) | |
769 | return -errno; | |
770 | ||
771 | if (cap_set_proc(d) < 0) | |
772 | return -errno; | |
773 | } | |
81a2b7ce LP |
774 | } |
775 | ||
776 | /* Third step: actually set the uids */ | |
777 | if (setresuid(uid, uid, uid) < 0) | |
778 | return -errno; | |
779 | ||
780 | /* At this point we should have all necessary capabilities but | |
781 | are otherwise a normal user. However, the caps might got | |
782 | corrupted due to the setresuid() so we need clean them up | |
783 | later. This is done outside of this call. */ | |
784 | ||
785 | return 0; | |
786 | } | |
787 | ||
5b6319dc LP |
788 | #ifdef HAVE_PAM |
789 | ||
790 | static int null_conv( | |
791 | int num_msg, | |
792 | const struct pam_message **msg, | |
793 | struct pam_response **resp, | |
794 | void *appdata_ptr) { | |
795 | ||
796 | /* We don't support conversations */ | |
797 | ||
798 | return PAM_CONV_ERR; | |
799 | } | |
800 | ||
801 | static int setup_pam( | |
802 | const char *name, | |
803 | const char *user, | |
940c5210 | 804 | uid_t uid, |
5b6319dc LP |
805 | const char *tty, |
806 | char ***pam_env, | |
807 | int fds[], unsigned n_fds) { | |
808 | ||
809 | static const struct pam_conv conv = { | |
810 | .conv = null_conv, | |
811 | .appdata_ptr = NULL | |
812 | }; | |
813 | ||
2d7c6aa2 | 814 | _cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL; |
5b6319dc | 815 | pam_handle_t *handle = NULL; |
d6e5f3ad | 816 | sigset_t old_ss; |
5b6319dc | 817 | int pam_code = PAM_SUCCESS; |
2d7c6aa2 | 818 | int err = 0; |
5b6319dc LP |
819 | char **e = NULL; |
820 | bool close_session = false; | |
821 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 822 | int flags = 0; |
5b6319dc LP |
823 | |
824 | assert(name); | |
825 | assert(user); | |
826 | assert(pam_env); | |
827 | ||
828 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 829 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
830 | * systemd via the cgroup logic. It will then remove the PAM |
831 | * session again. The parent process will exec() the actual | |
832 | * daemon. We do things this way to ensure that the main PID | |
833 | * of the daemon is the one we initially fork()ed. */ | |
834 | ||
2d7c6aa2 DH |
835 | err = barrier_create(&barrier); |
836 | if (err < 0) | |
837 | goto fail; | |
838 | ||
553d2243 | 839 | if (log_get_max_level() < LOG_DEBUG) |
970edce6 ZJS |
840 | flags |= PAM_SILENT; |
841 | ||
f546241b ZJS |
842 | pam_code = pam_start(name, user, &conv, &handle); |
843 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
844 | handle = NULL; |
845 | goto fail; | |
846 | } | |
847 | ||
f546241b ZJS |
848 | if (tty) { |
849 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
850 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 851 | goto fail; |
f546241b | 852 | } |
5b6319dc | 853 | |
970edce6 | 854 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 855 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
856 | goto fail; |
857 | ||
970edce6 | 858 | pam_code = pam_open_session(handle, flags); |
f546241b | 859 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
860 | goto fail; |
861 | ||
862 | close_session = true; | |
863 | ||
f546241b ZJS |
864 | e = pam_getenvlist(handle); |
865 | if (!e) { | |
5b6319dc LP |
866 | pam_code = PAM_BUF_ERR; |
867 | goto fail; | |
868 | } | |
869 | ||
870 | /* Block SIGTERM, so that we know that it won't get lost in | |
871 | * the child */ | |
ce30c8dc | 872 | |
72c0a2c2 | 873 | assert_se(sigprocmask_many(SIG_BLOCK, &old_ss, SIGTERM, -1) >= 0); |
5b6319dc LP |
874 | |
875 | parent_pid = getpid(); | |
876 | ||
f546241b ZJS |
877 | pam_pid = fork(); |
878 | if (pam_pid < 0) | |
5b6319dc LP |
879 | goto fail; |
880 | ||
881 | if (pam_pid == 0) { | |
882 | int sig; | |
883 | int r = EXIT_PAM; | |
884 | ||
885 | /* The child's job is to reset the PAM session on | |
886 | * termination */ | |
2d7c6aa2 | 887 | barrier_set_role(&barrier, BARRIER_CHILD); |
5b6319dc LP |
888 | |
889 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
890 | * of "/sbin/init"), to look pretty in /bin/ps */ |
891 | rename_process("(sd-pam)"); | |
5b6319dc LP |
892 | |
893 | /* Make sure we don't keep open the passed fds in this | |
894 | child. We assume that otherwise only those fds are | |
895 | open here that have been opened by PAM. */ | |
896 | close_many(fds, n_fds); | |
897 | ||
940c5210 AK |
898 | /* Drop privileges - we don't need any to pam_close_session |
899 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
900 | * If this fails, ignore the error - but expect sd-pam threads | |
901 | * to fail to exit normally */ | |
902 | if (setresuid(uid, uid, uid) < 0) | |
da927ba9 | 903 | log_error_errno(r, "Error: Failed to setresuid() in sd-pam: %m"); |
940c5210 | 904 | |
ce30c8dc LP |
905 | (void) ignore_signals(SIGPIPE, -1); |
906 | ||
940c5210 AK |
907 | /* Wait until our parent died. This will only work if |
908 | * the above setresuid() succeeds, otherwise the kernel | |
909 | * will not allow unprivileged parents kill their privileged | |
910 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
911 | * to do the rest for us. */ |
912 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
913 | goto child_finish; | |
914 | ||
2d7c6aa2 DH |
915 | /* Tell the parent that our setup is done. This is especially |
916 | * important regarding dropping privileges. Otherwise, unit | |
917 | * setup might race against our setresuid(2) call. */ | |
918 | barrier_place(&barrier); | |
919 | ||
5b6319dc LP |
920 | /* Check if our parent process might already have |
921 | * died? */ | |
922 | if (getppid() == parent_pid) { | |
d6e5f3ad DM |
923 | sigset_t ss; |
924 | ||
925 | assert_se(sigemptyset(&ss) >= 0); | |
926 | assert_se(sigaddset(&ss, SIGTERM) >= 0); | |
927 | ||
3dead8d9 LP |
928 | for (;;) { |
929 | if (sigwait(&ss, &sig) < 0) { | |
930 | if (errno == EINTR) | |
931 | continue; | |
932 | ||
933 | goto child_finish; | |
934 | } | |
5b6319dc | 935 | |
3dead8d9 LP |
936 | assert(sig == SIGTERM); |
937 | break; | |
938 | } | |
5b6319dc LP |
939 | } |
940 | ||
3dead8d9 | 941 | /* If our parent died we'll end the session */ |
f546241b | 942 | if (getppid() != parent_pid) { |
970edce6 | 943 | pam_code = pam_close_session(handle, flags); |
f546241b | 944 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 945 | goto child_finish; |
f546241b | 946 | } |
5b6319dc LP |
947 | |
948 | r = 0; | |
949 | ||
950 | child_finish: | |
970edce6 | 951 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
952 | _exit(r); |
953 | } | |
954 | ||
2d7c6aa2 DH |
955 | barrier_set_role(&barrier, BARRIER_PARENT); |
956 | ||
5b6319dc LP |
957 | /* If the child was forked off successfully it will do all the |
958 | * cleanups, so forget about the handle here. */ | |
959 | handle = NULL; | |
960 | ||
3b8bddde | 961 | /* Unblock SIGTERM again in the parent */ |
72c0a2c2 | 962 | assert_se(sigprocmask(SIG_SETMASK, &old_ss, NULL) >= 0); |
5b6319dc LP |
963 | |
964 | /* We close the log explicitly here, since the PAM modules | |
965 | * might have opened it, but we don't want this fd around. */ | |
966 | closelog(); | |
967 | ||
2d7c6aa2 DH |
968 | /* Synchronously wait for the child to initialize. We don't care for |
969 | * errors as we cannot recover. However, warn loudly if it happens. */ | |
970 | if (!barrier_place_and_sync(&barrier)) | |
971 | log_error("PAM initialization failed"); | |
972 | ||
aa87e624 LP |
973 | *pam_env = e; |
974 | e = NULL; | |
975 | ||
5b6319dc LP |
976 | return 0; |
977 | ||
978 | fail: | |
970edce6 ZJS |
979 | if (pam_code != PAM_SUCCESS) { |
980 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
9ba35398 | 981 | err = -EPERM; /* PAM errors do not map to errno */ |
970edce6 | 982 | } else { |
2d7c6aa2 | 983 | err = log_error_errno(err < 0 ? err : errno, "PAM failed: %m"); |
970edce6 | 984 | } |
9ba35398 | 985 | |
5b6319dc LP |
986 | if (handle) { |
987 | if (close_session) | |
970edce6 | 988 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 989 | |
970edce6 | 990 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
991 | } |
992 | ||
993 | strv_free(e); | |
994 | ||
995 | closelog(); | |
996 | ||
430c18ed | 997 | if (pam_pid > 1) { |
5b6319dc | 998 | kill(pam_pid, SIGTERM); |
430c18ed LP |
999 | kill(pam_pid, SIGCONT); |
1000 | } | |
5b6319dc | 1001 | |
9ba35398 | 1002 | return err; |
5b6319dc LP |
1003 | } |
1004 | #endif | |
1005 | ||
5d6b1584 LP |
1006 | static void rename_process_from_path(const char *path) { |
1007 | char process_name[11]; | |
1008 | const char *p; | |
1009 | size_t l; | |
1010 | ||
1011 | /* This resulting string must fit in 10 chars (i.e. the length | |
1012 | * of "/sbin/init") to look pretty in /bin/ps */ | |
1013 | ||
2b6bf07d | 1014 | p = basename(path); |
5d6b1584 LP |
1015 | if (isempty(p)) { |
1016 | rename_process("(...)"); | |
1017 | return; | |
1018 | } | |
1019 | ||
1020 | l = strlen(p); | |
1021 | if (l > 8) { | |
1022 | /* The end of the process name is usually more | |
1023 | * interesting, since the first bit might just be | |
1024 | * "systemd-" */ | |
1025 | p = p + l - 8; | |
1026 | l = 8; | |
1027 | } | |
1028 | ||
1029 | process_name[0] = '('; | |
1030 | memcpy(process_name+1, p, l); | |
1031 | process_name[1+l] = ')'; | |
1032 | process_name[1+l+1] = 0; | |
1033 | ||
1034 | rename_process(process_name); | |
1035 | } | |
1036 | ||
c0467cf3 | 1037 | #ifdef HAVE_SECCOMP |
17df7223 | 1038 | |
822a5960 | 1039 | static int apply_seccomp(const ExecContext *c) { |
17df7223 LP |
1040 | uint32_t negative_action, action; |
1041 | scmp_filter_ctx *seccomp; | |
c0467cf3 RC |
1042 | Iterator i; |
1043 | void *id; | |
17df7223 | 1044 | int r; |
8351ceae | 1045 | |
c0467cf3 | 1046 | assert(c); |
8351ceae | 1047 | |
17df7223 LP |
1048 | negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); |
1049 | ||
1050 | seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); | |
1051 | if (!seccomp) | |
1052 | return -ENOMEM; | |
8351ceae | 1053 | |
e9642be2 LP |
1054 | if (c->syscall_archs) { |
1055 | ||
1056 | SET_FOREACH(id, c->syscall_archs, i) { | |
1057 | r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); | |
1058 | if (r == -EEXIST) | |
1059 | continue; | |
7c66bae2 LP |
1060 | if (r < 0) |
1061 | goto finish; | |
e9642be2 | 1062 | } |
e9642be2 | 1063 | |
7c66bae2 | 1064 | } else { |
e9642be2 | 1065 | r = seccomp_add_secondary_archs(seccomp); |
7c66bae2 LP |
1066 | if (r < 0) |
1067 | goto finish; | |
57183d11 | 1068 | } |
8351ceae | 1069 | |
57183d11 | 1070 | action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action; |
17df7223 LP |
1071 | SET_FOREACH(id, c->syscall_filter, i) { |
1072 | r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0); | |
7c66bae2 LP |
1073 | if (r < 0) |
1074 | goto finish; | |
c0467cf3 | 1075 | } |
8351ceae | 1076 | |
7c66bae2 LP |
1077 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); |
1078 | if (r < 0) | |
1079 | goto finish; | |
1080 | ||
17df7223 | 1081 | r = seccomp_load(seccomp); |
7c66bae2 LP |
1082 | |
1083 | finish: | |
17df7223 | 1084 | seccomp_release(seccomp); |
4298d0b5 LP |
1085 | return r; |
1086 | } | |
1087 | ||
822a5960 | 1088 | static int apply_address_families(const ExecContext *c) { |
4298d0b5 LP |
1089 | scmp_filter_ctx *seccomp; |
1090 | Iterator i; | |
1091 | int r; | |
1092 | ||
1093 | assert(c); | |
1094 | ||
1095 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1096 | if (!seccomp) | |
1097 | return -ENOMEM; | |
1098 | ||
1099 | r = seccomp_add_secondary_archs(seccomp); | |
1100 | if (r < 0) | |
1101 | goto finish; | |
1102 | ||
1103 | if (c->address_families_whitelist) { | |
1104 | int af, first = 0, last = 0; | |
1105 | void *afp; | |
1106 | ||
1107 | /* If this is a whitelist, we first block the address | |
1108 | * families that are out of range and then everything | |
1109 | * that is not in the set. First, we find the lowest | |
1110 | * and highest address family in the set. */ | |
1111 | ||
1112 | SET_FOREACH(afp, c->address_families, i) { | |
1113 | af = PTR_TO_INT(afp); | |
17df7223 | 1114 | |
4298d0b5 LP |
1115 | if (af <= 0 || af >= af_max()) |
1116 | continue; | |
1117 | ||
1118 | if (first == 0 || af < first) | |
1119 | first = af; | |
1120 | ||
1121 | if (last == 0 || af > last) | |
1122 | last = af; | |
1123 | } | |
1124 | ||
1125 | assert((first == 0) == (last == 0)); | |
1126 | ||
1127 | if (first == 0) { | |
1128 | ||
1129 | /* No entries in the valid range, block everything */ | |
1130 | r = seccomp_rule_add( | |
1131 | seccomp, | |
1132 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1133 | SCMP_SYS(socket), | |
1134 | 0); | |
1135 | if (r < 0) | |
1136 | goto finish; | |
1137 | ||
1138 | } else { | |
1139 | ||
1140 | /* Block everything below the first entry */ | |
1141 | r = seccomp_rule_add( | |
1142 | seccomp, | |
1143 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1144 | SCMP_SYS(socket), | |
1145 | 1, | |
1146 | SCMP_A0(SCMP_CMP_LT, first)); | |
1147 | if (r < 0) | |
1148 | goto finish; | |
1149 | ||
1150 | /* Block everything above the last entry */ | |
1151 | r = seccomp_rule_add( | |
1152 | seccomp, | |
1153 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1154 | SCMP_SYS(socket), | |
1155 | 1, | |
1156 | SCMP_A0(SCMP_CMP_GT, last)); | |
1157 | if (r < 0) | |
1158 | goto finish; | |
1159 | ||
1160 | /* Block everything between the first and last | |
1161 | * entry */ | |
1162 | for (af = 1; af < af_max(); af++) { | |
1163 | ||
1164 | if (set_contains(c->address_families, INT_TO_PTR(af))) | |
1165 | continue; | |
1166 | ||
1167 | r = seccomp_rule_add( | |
1168 | seccomp, | |
1169 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1170 | SCMP_SYS(socket), | |
1171 | 1, | |
1172 | SCMP_A0(SCMP_CMP_EQ, af)); | |
1173 | if (r < 0) | |
1174 | goto finish; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | } else { | |
1179 | void *af; | |
1180 | ||
1181 | /* If this is a blacklist, then generate one rule for | |
1182 | * each address family that are then combined in OR | |
1183 | * checks. */ | |
1184 | ||
1185 | SET_FOREACH(af, c->address_families, i) { | |
1186 | ||
1187 | r = seccomp_rule_add( | |
1188 | seccomp, | |
1189 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1190 | SCMP_SYS(socket), | |
1191 | 1, | |
1192 | SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af))); | |
1193 | if (r < 0) | |
1194 | goto finish; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1199 | if (r < 0) | |
1200 | goto finish; | |
1201 | ||
1202 | r = seccomp_load(seccomp); | |
1203 | ||
1204 | finish: | |
1205 | seccomp_release(seccomp); | |
17df7223 | 1206 | return r; |
8351ceae | 1207 | } |
4298d0b5 | 1208 | |
c0467cf3 | 1209 | #endif |
8351ceae | 1210 | |
31a7eb86 ZJS |
1211 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
1212 | assert(idle_pipe); | |
1213 | ||
03e334a1 | 1214 | |
54eb2300 LP |
1215 | idle_pipe[1] = safe_close(idle_pipe[1]); |
1216 | idle_pipe[2] = safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1217 | |
1218 | if (idle_pipe[0] >= 0) { | |
1219 | int r; | |
1220 | ||
1221 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1222 | ||
1223 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
c7cc737f LP |
1224 | ssize_t n; |
1225 | ||
31a7eb86 | 1226 | /* Signal systemd that we are bored and want to continue. */ |
c7cc737f LP |
1227 | n = write(idle_pipe[3], "x", 1); |
1228 | if (n > 0) | |
cd972d69 ZJS |
1229 | /* Wait for systemd to react to the signal above. */ |
1230 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
31a7eb86 ZJS |
1231 | } |
1232 | ||
54eb2300 | 1233 | idle_pipe[0] = safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1234 | |
1235 | } | |
1236 | ||
54eb2300 | 1237 | idle_pipe[3] = safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1238 | } |
1239 | ||
7cae38c4 | 1240 | static int build_environment( |
9fa95f85 | 1241 | const ExecContext *c, |
7cae38c4 | 1242 | unsigned n_fds, |
8dd4c05b | 1243 | char ** fd_names, |
09812eb7 | 1244 | usec_t watchdog_usec, |
7cae38c4 LP |
1245 | const char *home, |
1246 | const char *username, | |
1247 | const char *shell, | |
1248 | char ***ret) { | |
1249 | ||
1250 | _cleanup_strv_free_ char **our_env = NULL; | |
1251 | unsigned n_env = 0; | |
1252 | char *x; | |
1253 | ||
1254 | assert(c); | |
1255 | assert(ret); | |
1256 | ||
8dd4c05b | 1257 | our_env = new0(char*, 11); |
7cae38c4 LP |
1258 | if (!our_env) |
1259 | return -ENOMEM; | |
1260 | ||
1261 | if (n_fds > 0) { | |
8dd4c05b LP |
1262 | _cleanup_free_ char *joined = NULL; |
1263 | ||
ccd06097 | 1264 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0) |
7cae38c4 LP |
1265 | return -ENOMEM; |
1266 | our_env[n_env++] = x; | |
1267 | ||
1268 | if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0) | |
1269 | return -ENOMEM; | |
1270 | our_env[n_env++] = x; | |
8dd4c05b LP |
1271 | |
1272 | joined = strv_join(fd_names, ":"); | |
1273 | if (!joined) | |
1274 | return -ENOMEM; | |
1275 | ||
1276 | x = strjoin("LISTEN_FDNAMES=", joined, NULL); | |
1277 | if (!x) | |
1278 | return -ENOMEM; | |
1279 | our_env[n_env++] = x; | |
7cae38c4 LP |
1280 | } |
1281 | ||
09812eb7 | 1282 | if (watchdog_usec > 0) { |
ccd06097 | 1283 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0) |
09812eb7 LP |
1284 | return -ENOMEM; |
1285 | our_env[n_env++] = x; | |
1286 | ||
de0671ee | 1287 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, watchdog_usec) < 0) |
09812eb7 LP |
1288 | return -ENOMEM; |
1289 | our_env[n_env++] = x; | |
1290 | } | |
1291 | ||
7cae38c4 LP |
1292 | if (home) { |
1293 | x = strappend("HOME=", home); | |
1294 | if (!x) | |
1295 | return -ENOMEM; | |
1296 | our_env[n_env++] = x; | |
1297 | } | |
1298 | ||
1299 | if (username) { | |
1300 | x = strappend("LOGNAME=", username); | |
1301 | if (!x) | |
1302 | return -ENOMEM; | |
1303 | our_env[n_env++] = x; | |
1304 | ||
1305 | x = strappend("USER=", username); | |
1306 | if (!x) | |
1307 | return -ENOMEM; | |
1308 | our_env[n_env++] = x; | |
1309 | } | |
1310 | ||
1311 | if (shell) { | |
1312 | x = strappend("SHELL=", shell); | |
1313 | if (!x) | |
1314 | return -ENOMEM; | |
1315 | our_env[n_env++] = x; | |
1316 | } | |
1317 | ||
1318 | if (is_terminal_input(c->std_input) || | |
1319 | c->std_output == EXEC_OUTPUT_TTY || | |
1320 | c->std_error == EXEC_OUTPUT_TTY || | |
1321 | c->tty_path) { | |
1322 | ||
1323 | x = strdup(default_term_for_tty(tty_path(c))); | |
1324 | if (!x) | |
1325 | return -ENOMEM; | |
1326 | our_env[n_env++] = x; | |
1327 | } | |
1328 | ||
1329 | our_env[n_env++] = NULL; | |
8dd4c05b | 1330 | assert(n_env <= 11); |
7cae38c4 LP |
1331 | |
1332 | *ret = our_env; | |
1333 | our_env = NULL; | |
1334 | ||
1335 | return 0; | |
1336 | } | |
1337 | ||
b4c14404 FB |
1338 | static int build_pass_environment(const ExecContext *c, char ***ret) { |
1339 | _cleanup_strv_free_ char **pass_env = NULL; | |
1340 | size_t n_env = 0, n_bufsize = 0; | |
1341 | char **i; | |
1342 | ||
1343 | STRV_FOREACH(i, c->pass_environment) { | |
1344 | _cleanup_free_ char *x = NULL; | |
1345 | char *v; | |
1346 | ||
1347 | v = getenv(*i); | |
1348 | if (!v) | |
1349 | continue; | |
1350 | x = strjoin(*i, "=", v, NULL); | |
1351 | if (!x) | |
1352 | return -ENOMEM; | |
1353 | if (!GREEDY_REALLOC(pass_env, n_bufsize, n_env + 2)) | |
1354 | return -ENOMEM; | |
1355 | pass_env[n_env++] = x; | |
1356 | pass_env[n_env] = NULL; | |
1357 | x = NULL; | |
1358 | } | |
1359 | ||
1360 | *ret = pass_env; | |
1361 | pass_env = NULL; | |
1362 | ||
1363 | return 0; | |
1364 | } | |
1365 | ||
8b44a3d2 LP |
1366 | static bool exec_needs_mount_namespace( |
1367 | const ExecContext *context, | |
1368 | const ExecParameters *params, | |
1369 | ExecRuntime *runtime) { | |
1370 | ||
1371 | assert(context); | |
1372 | assert(params); | |
1373 | ||
1374 | if (!strv_isempty(context->read_write_dirs) || | |
1375 | !strv_isempty(context->read_only_dirs) || | |
1376 | !strv_isempty(context->inaccessible_dirs)) | |
1377 | return true; | |
1378 | ||
1379 | if (context->mount_flags != 0) | |
1380 | return true; | |
1381 | ||
1382 | if (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) | |
1383 | return true; | |
1384 | ||
1385 | if (params->bus_endpoint_path) | |
1386 | return true; | |
1387 | ||
1388 | if (context->private_devices || | |
1389 | context->protect_system != PROTECT_SYSTEM_NO || | |
1390 | context->protect_home != PROTECT_HOME_NO) | |
1391 | return true; | |
1392 | ||
1393 | return false; | |
1394 | } | |
1395 | ||
a34ceba6 LP |
1396 | static int close_remaining_fds( |
1397 | const ExecParameters *params, | |
1398 | ExecRuntime *runtime, | |
1399 | int socket_fd, | |
1400 | int *fds, unsigned n_fds) { | |
1401 | ||
1402 | unsigned n_dont_close = 0; | |
1403 | int dont_close[n_fds + 7]; | |
1404 | ||
1405 | assert(params); | |
1406 | ||
1407 | if (params->stdin_fd >= 0) | |
1408 | dont_close[n_dont_close++] = params->stdin_fd; | |
1409 | if (params->stdout_fd >= 0) | |
1410 | dont_close[n_dont_close++] = params->stdout_fd; | |
1411 | if (params->stderr_fd >= 0) | |
1412 | dont_close[n_dont_close++] = params->stderr_fd; | |
1413 | ||
1414 | if (socket_fd >= 0) | |
1415 | dont_close[n_dont_close++] = socket_fd; | |
1416 | if (n_fds > 0) { | |
1417 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
1418 | n_dont_close += n_fds; | |
1419 | } | |
1420 | ||
1421 | if (params->bus_endpoint_fd >= 0) | |
1422 | dont_close[n_dont_close++] = params->bus_endpoint_fd; | |
1423 | ||
1424 | if (runtime) { | |
1425 | if (runtime->netns_storage_socket[0] >= 0) | |
1426 | dont_close[n_dont_close++] = runtime->netns_storage_socket[0]; | |
1427 | if (runtime->netns_storage_socket[1] >= 0) | |
1428 | dont_close[n_dont_close++] = runtime->netns_storage_socket[1]; | |
1429 | } | |
1430 | ||
1431 | return close_all_fds(dont_close, n_dont_close); | |
1432 | } | |
1433 | ||
ff0af2a1 | 1434 | static int exec_child( |
f2341e0a | 1435 | Unit *unit, |
ff0af2a1 LP |
1436 | ExecCommand *command, |
1437 | const ExecContext *context, | |
1438 | const ExecParameters *params, | |
1439 | ExecRuntime *runtime, | |
1440 | char **argv, | |
1441 | int socket_fd, | |
1442 | int *fds, unsigned n_fds, | |
1443 | char **files_env, | |
1444 | int *exit_status) { | |
d35fbf6b | 1445 | |
b4c14404 | 1446 | _cleanup_strv_free_ char **our_env = NULL, **pass_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL; |
9008e1ac | 1447 | _cleanup_free_ char *mac_selinux_context_net = NULL; |
5f5d8eab | 1448 | const char *username = NULL, *home = NULL, *shell = NULL, *wd; |
fed1e721 LP |
1449 | uid_t uid = UID_INVALID; |
1450 | gid_t gid = GID_INVALID; | |
ff0af2a1 | 1451 | int i, r; |
ee818b89 | 1452 | bool needs_mount_namespace; |
034c6ed7 | 1453 | |
f2341e0a | 1454 | assert(unit); |
5cb5a6ff LP |
1455 | assert(command); |
1456 | assert(context); | |
d35fbf6b | 1457 | assert(params); |
ff0af2a1 | 1458 | assert(exit_status); |
d35fbf6b DM |
1459 | |
1460 | rename_process_from_path(command->path); | |
1461 | ||
1462 | /* We reset exactly these signals, since they are the | |
1463 | * only ones we set to SIG_IGN in the main daemon. All | |
1464 | * others we leave untouched because we set them to | |
1465 | * SIG_DFL or a valid handler initially, both of which | |
1466 | * will be demoted to SIG_DFL. */ | |
ce30c8dc LP |
1467 | (void) default_signals(SIGNALS_CRASH_HANDLER, |
1468 | SIGNALS_IGNORE, -1); | |
d35fbf6b DM |
1469 | |
1470 | if (context->ignore_sigpipe) | |
ce30c8dc | 1471 | (void) ignore_signals(SIGPIPE, -1); |
d35fbf6b | 1472 | |
ff0af2a1 LP |
1473 | r = reset_signal_mask(); |
1474 | if (r < 0) { | |
1475 | *exit_status = EXIT_SIGNAL_MASK; | |
1476 | return r; | |
d35fbf6b | 1477 | } |
034c6ed7 | 1478 | |
d35fbf6b DM |
1479 | if (params->idle_pipe) |
1480 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 1481 | |
d35fbf6b DM |
1482 | /* Close sockets very early to make sure we don't |
1483 | * block init reexecution because it cannot bind its | |
1484 | * sockets */ | |
ff0af2a1 | 1485 | |
d35fbf6b | 1486 | log_forget_fds(); |
4f2d528d | 1487 | |
a34ceba6 | 1488 | r = close_remaining_fds(params, runtime, socket_fd, fds, n_fds); |
ff0af2a1 LP |
1489 | if (r < 0) { |
1490 | *exit_status = EXIT_FDS; | |
1491 | return r; | |
8c7be95e LP |
1492 | } |
1493 | ||
d35fbf6b DM |
1494 | if (!context->same_pgrp) |
1495 | if (setsid() < 0) { | |
ff0af2a1 | 1496 | *exit_status = EXIT_SETSID; |
d35fbf6b DM |
1497 | return -errno; |
1498 | } | |
9e2f7c11 | 1499 | |
d35fbf6b DM |
1500 | exec_context_tty_reset(context); |
1501 | ||
1502 | if (params->confirm_spawn) { | |
1503 | char response; | |
1504 | ||
ff0af2a1 LP |
1505 | r = ask_for_confirmation(&response, argv); |
1506 | if (r == -ETIMEDOUT) | |
d35fbf6b | 1507 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); |
ff0af2a1 LP |
1508 | else if (r < 0) |
1509 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-r)); | |
d35fbf6b DM |
1510 | else if (response == 's') { |
1511 | write_confirm_message("Skipping execution.\n"); | |
ff0af2a1 | 1512 | *exit_status = EXIT_CONFIRM; |
d35fbf6b DM |
1513 | return -ECANCELED; |
1514 | } else if (response == 'n') { | |
1515 | write_confirm_message("Failing execution.\n"); | |
ff0af2a1 | 1516 | *exit_status = 0; |
d35fbf6b DM |
1517 | return 0; |
1518 | } | |
1519 | } | |
1a63a750 | 1520 | |
524daa8c ZJS |
1521 | if (context->user) { |
1522 | username = context->user; | |
ff0af2a1 LP |
1523 | r = get_user_creds(&username, &uid, &gid, &home, &shell); |
1524 | if (r < 0) { | |
1525 | *exit_status = EXIT_USER; | |
1526 | return r; | |
524daa8c ZJS |
1527 | } |
1528 | } | |
1529 | ||
5bc7452b RC |
1530 | if (context->group) { |
1531 | const char *g = context->group; | |
1532 | ||
1533 | r = get_group_creds(&g, &gid); | |
1534 | if (r < 0) { | |
1535 | *exit_status = EXIT_GROUP; | |
1536 | return r; | |
1537 | } | |
1538 | } | |
1539 | ||
1540 | ||
d35fbf6b DM |
1541 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1542 | * must sure to drop O_NONBLOCK */ | |
1543 | if (socket_fd >= 0) | |
a34ceba6 | 1544 | (void) fd_nonblock(socket_fd, false); |
acbb0225 | 1545 | |
a34ceba6 | 1546 | r = setup_input(context, params, socket_fd); |
ff0af2a1 LP |
1547 | if (r < 0) { |
1548 | *exit_status = EXIT_STDIN; | |
1549 | return r; | |
d35fbf6b | 1550 | } |
034c6ed7 | 1551 | |
a34ceba6 | 1552 | r = setup_output(unit, context, params, STDOUT_FILENO, socket_fd, basename(command->path), uid, gid); |
ff0af2a1 LP |
1553 | if (r < 0) { |
1554 | *exit_status = EXIT_STDOUT; | |
1555 | return r; | |
d35fbf6b DM |
1556 | } |
1557 | ||
a34ceba6 | 1558 | r = setup_output(unit, context, params, STDERR_FILENO, socket_fd, basename(command->path), uid, gid); |
ff0af2a1 LP |
1559 | if (r < 0) { |
1560 | *exit_status = EXIT_STDERR; | |
1561 | return r; | |
d35fbf6b DM |
1562 | } |
1563 | ||
1564 | if (params->cgroup_path) { | |
ff0af2a1 LP |
1565 | r = cg_attach_everywhere(params->cgroup_supported, params->cgroup_path, 0, NULL, NULL); |
1566 | if (r < 0) { | |
1567 | *exit_status = EXIT_CGROUP; | |
1568 | return r; | |
309bff19 | 1569 | } |
d35fbf6b | 1570 | } |
309bff19 | 1571 | |
d35fbf6b | 1572 | if (context->oom_score_adjust_set) { |
d5243d62 | 1573 | char t[DECIMAL_STR_MAX(context->oom_score_adjust)]; |
f2b68789 | 1574 | |
d5243d62 LP |
1575 | /* When we can't make this change due to EPERM, then |
1576 | * let's silently skip over it. User namespaces | |
1577 | * prohibit write access to this file, and we | |
1578 | * shouldn't trip up over that. */ | |
613b411c | 1579 | |
d5243d62 | 1580 | sprintf(t, "%i", context->oom_score_adjust); |
ad118bda | 1581 | r = write_string_file("/proc/self/oom_score_adj", t, 0); |
6cb7fa17 | 1582 | if (r == -EPERM || r == -EACCES) { |
ff0af2a1 | 1583 | log_open(); |
f2341e0a | 1584 | log_unit_debug_errno(unit, r, "Failed to adjust OOM setting, assuming containerized execution, ignoring: %m"); |
ff0af2a1 LP |
1585 | log_close(); |
1586 | } else if (r < 0) { | |
1587 | *exit_status = EXIT_OOM_ADJUST; | |
d35fbf6b | 1588 | return -errno; |
613b411c | 1589 | } |
d35fbf6b DM |
1590 | } |
1591 | ||
1592 | if (context->nice_set) | |
1593 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
ff0af2a1 | 1594 | *exit_status = EXIT_NICE; |
d35fbf6b | 1595 | return -errno; |
613b411c LP |
1596 | } |
1597 | ||
d35fbf6b DM |
1598 | if (context->cpu_sched_set) { |
1599 | struct sched_param param = { | |
1600 | .sched_priority = context->cpu_sched_priority, | |
1601 | }; | |
1602 | ||
ff0af2a1 LP |
1603 | r = sched_setscheduler(0, |
1604 | context->cpu_sched_policy | | |
1605 | (context->cpu_sched_reset_on_fork ? | |
1606 | SCHED_RESET_ON_FORK : 0), | |
1607 | ¶m); | |
1608 | if (r < 0) { | |
1609 | *exit_status = EXIT_SETSCHEDULER; | |
d35fbf6b | 1610 | return -errno; |
fc9b2a84 | 1611 | } |
d35fbf6b | 1612 | } |
fc9b2a84 | 1613 | |
d35fbf6b DM |
1614 | if (context->cpuset) |
1615 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
ff0af2a1 | 1616 | *exit_status = EXIT_CPUAFFINITY; |
d35fbf6b | 1617 | return -errno; |
034c6ed7 LP |
1618 | } |
1619 | ||
d35fbf6b DM |
1620 | if (context->ioprio_set) |
1621 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
ff0af2a1 | 1622 | *exit_status = EXIT_IOPRIO; |
d35fbf6b DM |
1623 | return -errno; |
1624 | } | |
da726a4d | 1625 | |
d35fbf6b DM |
1626 | if (context->timer_slack_nsec != NSEC_INFINITY) |
1627 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
ff0af2a1 | 1628 | *exit_status = EXIT_TIMERSLACK; |
d35fbf6b | 1629 | return -errno; |
4c2630eb | 1630 | } |
9eba9da4 | 1631 | |
050f7277 | 1632 | if (context->personality != PERSONALITY_INVALID) |
d35fbf6b | 1633 | if (personality(context->personality) < 0) { |
ff0af2a1 | 1634 | *exit_status = EXIT_PERSONALITY; |
d35fbf6b | 1635 | return -errno; |
4c2630eb | 1636 | } |
94f04347 | 1637 | |
d35fbf6b | 1638 | if (context->utmp_id) |
023a4f67 LP |
1639 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path, |
1640 | context->utmp_mode == EXEC_UTMP_INIT ? INIT_PROCESS : | |
1641 | context->utmp_mode == EXEC_UTMP_LOGIN ? LOGIN_PROCESS : | |
1642 | USER_PROCESS, | |
1643 | username ? "root" : context->user); | |
d35fbf6b | 1644 | |
524daa8c | 1645 | if (context->user && is_terminal_input(context->std_input)) { |
ff0af2a1 LP |
1646 | r = chown_terminal(STDIN_FILENO, uid); |
1647 | if (r < 0) { | |
1648 | *exit_status = EXIT_STDIN; | |
1649 | return r; | |
071830ff | 1650 | } |
d35fbf6b | 1651 | } |
8e274523 | 1652 | |
e44da745 | 1653 | if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) { |
fed1e721 | 1654 | uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid; |
e44da745 | 1655 | |
ff0af2a1 LP |
1656 | r = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint); |
1657 | if (r < 0) { | |
1658 | *exit_status = EXIT_BUS_ENDPOINT; | |
1659 | return r; | |
e44da745 DM |
1660 | } |
1661 | } | |
e44da745 | 1662 | |
a931ad47 LP |
1663 | /* If delegation is enabled we'll pass ownership of the cgroup |
1664 | * (but only in systemd's own controller hierarchy!) to the | |
1665 | * user of the new process. */ | |
1666 | if (params->cgroup_path && context->user && params->cgroup_delegate) { | |
ff0af2a1 LP |
1667 | r = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid); |
1668 | if (r < 0) { | |
1669 | *exit_status = EXIT_CGROUP; | |
1670 | return r; | |
d35fbf6b | 1671 | } |
034c6ed7 | 1672 | |
034c6ed7 | 1673 | |
ff0af2a1 LP |
1674 | r = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0755, uid, gid); |
1675 | if (r < 0) { | |
1676 | *exit_status = EXIT_CGROUP; | |
1677 | return r; | |
034c6ed7 | 1678 | } |
d35fbf6b | 1679 | } |
034c6ed7 | 1680 | |
d35fbf6b DM |
1681 | if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) { |
1682 | char **rt; | |
fb33a393 | 1683 | |
d35fbf6b DM |
1684 | STRV_FOREACH(rt, context->runtime_directory) { |
1685 | _cleanup_free_ char *p; | |
94f04347 | 1686 | |
d35fbf6b DM |
1687 | p = strjoin(params->runtime_prefix, "/", *rt, NULL); |
1688 | if (!p) { | |
ff0af2a1 | 1689 | *exit_status = EXIT_RUNTIME_DIRECTORY; |
d35fbf6b | 1690 | return -ENOMEM; |
94f04347 | 1691 | } |
94f04347 | 1692 | |
6bfe5c28 LP |
1693 | r = mkdir_p_label(p, context->runtime_directory_mode); |
1694 | if (r < 0) { | |
1695 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1696 | return r; | |
1697 | } | |
1698 | ||
1699 | r = chmod_and_chown(p, context->runtime_directory_mode, uid, gid); | |
ff0af2a1 LP |
1700 | if (r < 0) { |
1701 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1702 | return r; | |
94f04347 | 1703 | } |
d35fbf6b DM |
1704 | } |
1705 | } | |
94f04347 | 1706 | |
b213e1c1 SW |
1707 | umask(context->umask); |
1708 | ||
d35fbf6b | 1709 | if (params->apply_permissions) { |
ff0af2a1 LP |
1710 | r = enforce_groups(context, username, gid); |
1711 | if (r < 0) { | |
1712 | *exit_status = EXIT_GROUP; | |
1713 | return r; | |
d35fbf6b | 1714 | } |
6bf6e43e | 1715 | #ifdef HAVE_SMACK |
6bf6e43e SW |
1716 | if (context->smack_process_label) { |
1717 | r = mac_smack_apply_pid(0, context->smack_process_label); | |
1718 | if (r < 0) { | |
1719 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1720 | return r; | |
1721 | } | |
1722 | } | |
1723 | #ifdef SMACK_DEFAULT_PROCESS_LABEL | |
1724 | else { | |
1725 | _cleanup_free_ char *exec_label = NULL; | |
1726 | ||
1727 | r = mac_smack_read(command->path, SMACK_ATTR_EXEC, &exec_label); | |
1728 | if (r < 0 && r != -ENODATA && r != -EOPNOTSUPP) { | |
1729 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1730 | return r; | |
1731 | } | |
1732 | ||
1733 | r = mac_smack_apply_pid(0, exec_label ? : SMACK_DEFAULT_PROCESS_LABEL); | |
1734 | if (r < 0) { | |
1735 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1736 | return r; | |
1737 | } | |
1738 | } | |
6bf6e43e SW |
1739 | #endif |
1740 | #endif | |
d35fbf6b | 1741 | #ifdef HAVE_PAM |
b213e1c1 SW |
1742 | if (context->pam_name && username) { |
1743 | r = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds); | |
1744 | if (r < 0) { | |
1745 | *exit_status = EXIT_PAM; | |
1746 | return r; | |
1747 | } | |
d35fbf6b | 1748 | } |
d35fbf6b | 1749 | #endif |
b213e1c1 | 1750 | } |
ac45f971 | 1751 | |
d35fbf6b | 1752 | if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) { |
ff0af2a1 LP |
1753 | r = setup_netns(runtime->netns_storage_socket); |
1754 | if (r < 0) { | |
1755 | *exit_status = EXIT_NETWORK; | |
1756 | return r; | |
d35fbf6b DM |
1757 | } |
1758 | } | |
169c1bda | 1759 | |
ee818b89 AC |
1760 | needs_mount_namespace = exec_needs_mount_namespace(context, params, runtime); |
1761 | ||
1762 | if (needs_mount_namespace) { | |
d35fbf6b DM |
1763 | char *tmp = NULL, *var = NULL; |
1764 | ||
1765 | /* The runtime struct only contains the parent | |
1766 | * of the private /tmp, which is | |
1767 | * non-accessible to world users. Inside of it | |
1768 | * there's a /tmp that is sticky, and that's | |
1769 | * the one we want to use here. */ | |
1770 | ||
1771 | if (context->private_tmp && runtime) { | |
1772 | if (runtime->tmp_dir) | |
63c372cb | 1773 | tmp = strjoina(runtime->tmp_dir, "/tmp"); |
d35fbf6b | 1774 | if (runtime->var_tmp_dir) |
63c372cb | 1775 | var = strjoina(runtime->var_tmp_dir, "/tmp"); |
d35fbf6b | 1776 | } |
d8b4e2e9 | 1777 | |
ff0af2a1 | 1778 | r = setup_namespace( |
ee818b89 | 1779 | params->apply_chroot ? context->root_directory : NULL, |
d35fbf6b DM |
1780 | context->read_write_dirs, |
1781 | context->read_only_dirs, | |
1782 | context->inaccessible_dirs, | |
1783 | tmp, | |
1784 | var, | |
e44da745 | 1785 | params->bus_endpoint_path, |
d35fbf6b DM |
1786 | context->private_devices, |
1787 | context->protect_home, | |
1788 | context->protect_system, | |
1789 | context->mount_flags); | |
0015ebf3 | 1790 | |
ff0af2a1 LP |
1791 | /* If we couldn't set up the namespace this is |
1792 | * probably due to a missing capability. In this case, | |
1793 | * silently proceeed. */ | |
1794 | if (r == -EPERM || r == -EACCES) { | |
1795 | log_open(); | |
f2341e0a | 1796 | log_unit_debug_errno(unit, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m"); |
ff0af2a1 LP |
1797 | log_close(); |
1798 | } else if (r < 0) { | |
1799 | *exit_status = EXIT_NAMESPACE; | |
1800 | return r; | |
81a2b7ce | 1801 | } |
d35fbf6b | 1802 | } |
81a2b7ce | 1803 | |
5f5d8eab LP |
1804 | if (context->working_directory_home) |
1805 | wd = home; | |
1806 | else if (context->working_directory) | |
1807 | wd = context->working_directory; | |
1808 | else | |
1809 | wd = "/"; | |
1810 | ||
d35fbf6b | 1811 | if (params->apply_chroot) { |
ee818b89 | 1812 | if (!needs_mount_namespace && context->root_directory) |
d35fbf6b | 1813 | if (chroot(context->root_directory) < 0) { |
ff0af2a1 | 1814 | *exit_status = EXIT_CHROOT; |
d35fbf6b | 1815 | return -errno; |
8aa75193 LP |
1816 | } |
1817 | ||
5f5d8eab | 1818 | if (chdir(wd) < 0 && |
4c08c824 | 1819 | !context->working_directory_missing_ok) { |
ff0af2a1 | 1820 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1821 | return -errno; |
1822 | } | |
1823 | } else { | |
5f5d8eab | 1824 | const char *d; |
8aa75193 | 1825 | |
5f5d8eab | 1826 | d = strjoina(strempty(context->root_directory), "/", strempty(wd)); |
cf1d0302 LP |
1827 | if (chdir(d) < 0 && |
1828 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1829 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1830 | return -errno; |
1831 | } | |
1832 | } | |
e66cf1a3 | 1833 | |
9008e1ac MS |
1834 | #ifdef HAVE_SELINUX |
1835 | if (params->apply_permissions && mac_selinux_use() && params->selinux_context_net && socket_fd >= 0) { | |
ff0af2a1 LP |
1836 | r = mac_selinux_get_child_mls_label(socket_fd, command->path, context->selinux_context, &mac_selinux_context_net); |
1837 | if (r < 0) { | |
1838 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1839 | return r; | |
9008e1ac MS |
1840 | } |
1841 | } | |
1842 | #endif | |
1843 | ||
d35fbf6b DM |
1844 | /* We repeat the fd closing here, to make sure that |
1845 | * nothing is leaked from the PAM modules. Note that | |
1846 | * we are more aggressive this time since socket_fd | |
e44da745 DM |
1847 | * and the netns fds we don't need anymore. The custom |
1848 | * endpoint fd was needed to upload the policy and can | |
1849 | * now be closed as well. */ | |
ff0af2a1 LP |
1850 | r = close_all_fds(fds, n_fds); |
1851 | if (r >= 0) | |
1852 | r = shift_fds(fds, n_fds); | |
1853 | if (r >= 0) | |
1854 | r = flags_fds(fds, n_fds, context->non_blocking); | |
1855 | if (r < 0) { | |
1856 | *exit_status = EXIT_FDS; | |
1857 | return r; | |
d35fbf6b | 1858 | } |
e66cf1a3 | 1859 | |
d35fbf6b | 1860 | if (params->apply_permissions) { |
e66cf1a3 | 1861 | |
755d4b67 IP |
1862 | int secure_bits = context->secure_bits; |
1863 | ||
d35fbf6b DM |
1864 | for (i = 0; i < _RLIMIT_MAX; i++) { |
1865 | if (!context->rlimit[i]) | |
1866 | continue; | |
1867 | ||
1868 | if (setrlimit_closest(i, context->rlimit[i]) < 0) { | |
ff0af2a1 | 1869 | *exit_status = EXIT_LIMITS; |
d35fbf6b | 1870 | return -errno; |
e66cf1a3 LP |
1871 | } |
1872 | } | |
1873 | ||
a103496c IP |
1874 | if (!cap_test_all(context->capability_bounding_set)) { |
1875 | r = capability_bounding_set_drop(context->capability_bounding_set, false); | |
ff0af2a1 LP |
1876 | if (r < 0) { |
1877 | *exit_status = EXIT_CAPABILITIES; | |
1878 | return r; | |
3b8bddde | 1879 | } |
4c2630eb | 1880 | } |
3b8bddde | 1881 | |
755d4b67 IP |
1882 | /* This is done before enforce_user, but ambient set |
1883 | * does not survive over setresuid() if keep_caps is not set. */ | |
1884 | if (context->capability_ambient_set != 0) { | |
1885 | r = capability_ambient_set_apply(context->capability_ambient_set, true); | |
1886 | if (r < 0) { | |
1887 | *exit_status = EXIT_CAPABILITIES; | |
1888 | return r; | |
1889 | } | |
1890 | ||
1891 | if (context->capabilities) { | |
1892 | ||
1893 | /* The capabilities in ambient set need to be also in the inherited | |
1894 | * set. If they aren't, trying to get them will fail. Add the ambient | |
1895 | * set inherited capabilities to the capability set in the context. | |
1896 | * This is needed because if capabilities are set (using "Capabilities=" | |
1897 | * keyword), they will override whatever we set now. */ | |
1898 | ||
1899 | r = capability_update_inherited_set(context->capabilities, context->capability_ambient_set); | |
1900 | if (r < 0) { | |
1901 | *exit_status = EXIT_CAPABILITIES; | |
1902 | return r; | |
1903 | } | |
1904 | } | |
1905 | } | |
1906 | ||
d35fbf6b | 1907 | if (context->user) { |
ff0af2a1 LP |
1908 | r = enforce_user(context, uid); |
1909 | if (r < 0) { | |
1910 | *exit_status = EXIT_USER; | |
1911 | return r; | |
5b6319dc | 1912 | } |
755d4b67 IP |
1913 | if (context->capability_ambient_set != 0) { |
1914 | ||
1915 | /* Fix the ambient capabilities after user change. */ | |
1916 | r = capability_ambient_set_apply(context->capability_ambient_set, false); | |
1917 | if (r < 0) { | |
1918 | *exit_status = EXIT_CAPABILITIES; | |
1919 | return r; | |
1920 | } | |
1921 | ||
1922 | /* If we were asked to change user and ambient capabilities | |
1923 | * were requested, we had to add keep-caps to the securebits | |
1924 | * so that we would maintain the inherited capability set | |
1925 | * through the setresuid(). Make sure that the bit is added | |
1926 | * also to the context secure_bits so that we don't try to | |
1927 | * drop the bit away next. */ | |
1928 | ||
1929 | secure_bits |= 1<<SECURE_KEEP_CAPS; | |
1930 | } | |
5b6319dc | 1931 | } |
d35fbf6b DM |
1932 | |
1933 | /* PR_GET_SECUREBITS is not privileged, while | |
1934 | * PR_SET_SECUREBITS is. So to suppress | |
1935 | * potential EPERMs we'll try not to call | |
1936 | * PR_SET_SECUREBITS unless necessary. */ | |
755d4b67 IP |
1937 | if (prctl(PR_GET_SECUREBITS) != secure_bits) |
1938 | if (prctl(PR_SET_SECUREBITS, secure_bits) < 0) { | |
ff0af2a1 | 1939 | *exit_status = EXIT_SECUREBITS; |
d35fbf6b | 1940 | return -errno; |
ff01d048 | 1941 | } |
5b6319dc | 1942 | |
d35fbf6b DM |
1943 | if (context->capabilities) |
1944 | if (cap_set_proc(context->capabilities) < 0) { | |
ff0af2a1 | 1945 | *exit_status = EXIT_CAPABILITIES; |
d35fbf6b | 1946 | return -errno; |
613b411c LP |
1947 | } |
1948 | ||
d35fbf6b DM |
1949 | if (context->no_new_privileges) |
1950 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { | |
ff0af2a1 | 1951 | *exit_status = EXIT_NO_NEW_PRIVILEGES; |
d35fbf6b DM |
1952 | return -errno; |
1953 | } | |
1954 | ||
1955 | #ifdef HAVE_SECCOMP | |
1956 | if (context->address_families_whitelist || | |
1957 | !set_isempty(context->address_families)) { | |
ff0af2a1 LP |
1958 | r = apply_address_families(context); |
1959 | if (r < 0) { | |
1960 | *exit_status = EXIT_ADDRESS_FAMILIES; | |
1961 | return r; | |
4c2630eb MS |
1962 | } |
1963 | } | |
04aa0cb9 | 1964 | |
d35fbf6b DM |
1965 | if (context->syscall_whitelist || |
1966 | !set_isempty(context->syscall_filter) || | |
1967 | !set_isempty(context->syscall_archs)) { | |
ff0af2a1 LP |
1968 | r = apply_seccomp(context); |
1969 | if (r < 0) { | |
1970 | *exit_status = EXIT_SECCOMP; | |
1971 | return r; | |
81a2b7ce | 1972 | } |
d35fbf6b DM |
1973 | } |
1974 | #endif | |
81a2b7ce | 1975 | |
d35fbf6b | 1976 | #ifdef HAVE_SELINUX |
6baa7db0 | 1977 | if (mac_selinux_use()) { |
9008e1ac | 1978 | char *exec_context = mac_selinux_context_net ?: context->selinux_context; |
16115b0a | 1979 | |
9008e1ac | 1980 | if (exec_context) { |
ff0af2a1 LP |
1981 | r = setexeccon(exec_context); |
1982 | if (r < 0) { | |
1983 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1984 | return r; | |
16115b0a | 1985 | } |
81a2b7ce | 1986 | } |
81a2b7ce | 1987 | } |
d35fbf6b | 1988 | #endif |
81a2b7ce | 1989 | |
d35fbf6b | 1990 | #ifdef HAVE_APPARMOR |
6baa7db0 | 1991 | if (context->apparmor_profile && mac_apparmor_use()) { |
ff0af2a1 LP |
1992 | r = aa_change_onexec(context->apparmor_profile); |
1993 | if (r < 0 && !context->apparmor_profile_ignore) { | |
1994 | *exit_status = EXIT_APPARMOR_PROFILE; | |
5482192e | 1995 | return -errno; |
d35fbf6b | 1996 | } |
034c6ed7 | 1997 | } |
d35fbf6b DM |
1998 | #endif |
1999 | } | |
034c6ed7 | 2000 | |
8dd4c05b | 2001 | r = build_environment(context, n_fds, params->fd_names, params->watchdog_usec, home, username, shell, &our_env); |
ff0af2a1 LP |
2002 | if (r < 0) { |
2003 | *exit_status = EXIT_MEMORY; | |
2004 | return r; | |
d35fbf6b | 2005 | } |
034c6ed7 | 2006 | |
b4c14404 FB |
2007 | r = build_pass_environment(context, &pass_env); |
2008 | if (r < 0) { | |
2009 | *exit_status = EXIT_MEMORY; | |
2010 | return r; | |
2011 | } | |
2012 | ||
2013 | final_env = strv_env_merge(6, | |
d35fbf6b DM |
2014 | params->environment, |
2015 | our_env, | |
b4c14404 | 2016 | pass_env, |
d35fbf6b DM |
2017 | context->environment, |
2018 | files_env, | |
2019 | pam_env, | |
2020 | NULL); | |
2021 | if (!final_env) { | |
ff0af2a1 | 2022 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
2023 | return -ENOMEM; |
2024 | } | |
81a2b7ce | 2025 | |
d35fbf6b DM |
2026 | final_argv = replace_env_argv(argv, final_env); |
2027 | if (!final_argv) { | |
ff0af2a1 | 2028 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
2029 | return -ENOMEM; |
2030 | } | |
034c6ed7 | 2031 | |
d35fbf6b | 2032 | final_env = strv_env_clean(final_env); |
260abb78 | 2033 | |
553d2243 | 2034 | if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { |
d35fbf6b | 2035 | _cleanup_free_ char *line; |
81a2b7ce | 2036 | |
d35fbf6b DM |
2037 | line = exec_command_line(final_argv); |
2038 | if (line) { | |
2039 | log_open(); | |
f2341e0a LP |
2040 | log_struct(LOG_DEBUG, |
2041 | LOG_UNIT_ID(unit), | |
2042 | "EXECUTABLE=%s", command->path, | |
2043 | LOG_UNIT_MESSAGE(unit, "Executing: %s", line), | |
2044 | NULL); | |
d35fbf6b DM |
2045 | log_close(); |
2046 | } | |
2047 | } | |
dd305ec9 | 2048 | |
d35fbf6b | 2049 | execve(command->path, final_argv, final_env); |
ff0af2a1 | 2050 | *exit_status = EXIT_EXEC; |
d35fbf6b DM |
2051 | return -errno; |
2052 | } | |
81a2b7ce | 2053 | |
f2341e0a LP |
2054 | int exec_spawn(Unit *unit, |
2055 | ExecCommand *command, | |
d35fbf6b DM |
2056 | const ExecContext *context, |
2057 | const ExecParameters *params, | |
2058 | ExecRuntime *runtime, | |
2059 | pid_t *ret) { | |
8351ceae | 2060 | |
d35fbf6b DM |
2061 | _cleanup_strv_free_ char **files_env = NULL; |
2062 | int *fds = NULL; unsigned n_fds = 0; | |
ff0af2a1 LP |
2063 | _cleanup_free_ char *line = NULL; |
2064 | int socket_fd, r; | |
2065 | char **argv; | |
d35fbf6b | 2066 | pid_t pid; |
8351ceae | 2067 | |
f2341e0a | 2068 | assert(unit); |
d35fbf6b DM |
2069 | assert(command); |
2070 | assert(context); | |
2071 | assert(ret); | |
2072 | assert(params); | |
2073 | assert(params->fds || params->n_fds <= 0); | |
4298d0b5 | 2074 | |
d35fbf6b DM |
2075 | if (context->std_input == EXEC_INPUT_SOCKET || |
2076 | context->std_output == EXEC_OUTPUT_SOCKET || | |
2077 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 2078 | |
ff0af2a1 | 2079 | if (params->n_fds != 1) { |
f2341e0a | 2080 | log_unit_error(unit, "Got more than one socket."); |
d35fbf6b | 2081 | return -EINVAL; |
ff0af2a1 | 2082 | } |
eef65bf3 | 2083 | |
d35fbf6b DM |
2084 | socket_fd = params->fds[0]; |
2085 | } else { | |
2086 | socket_fd = -1; | |
2087 | fds = params->fds; | |
2088 | n_fds = params->n_fds; | |
2089 | } | |
94f04347 | 2090 | |
f2341e0a | 2091 | r = exec_context_load_environment(unit, context, &files_env); |
ff0af2a1 | 2092 | if (r < 0) |
f2341e0a | 2093 | return log_unit_error_errno(unit, r, "Failed to load environment files: %m"); |
034c6ed7 | 2094 | |
d35fbf6b | 2095 | argv = params->argv ?: command->argv; |
d35fbf6b DM |
2096 | line = exec_command_line(argv); |
2097 | if (!line) | |
2098 | return log_oom(); | |
fab56fc5 | 2099 | |
f2341e0a LP |
2100 | log_struct(LOG_DEBUG, |
2101 | LOG_UNIT_ID(unit), | |
2102 | LOG_UNIT_MESSAGE(unit, "About to execute: %s", line), | |
2103 | "EXECUTABLE=%s", command->path, | |
2104 | NULL); | |
d35fbf6b DM |
2105 | pid = fork(); |
2106 | if (pid < 0) | |
74129a12 | 2107 | return log_unit_error_errno(unit, errno, "Failed to fork: %m"); |
d35fbf6b DM |
2108 | |
2109 | if (pid == 0) { | |
ff0af2a1 LP |
2110 | int exit_status; |
2111 | ||
f2341e0a LP |
2112 | r = exec_child(unit, |
2113 | command, | |
ff0af2a1 LP |
2114 | context, |
2115 | params, | |
2116 | runtime, | |
2117 | argv, | |
2118 | socket_fd, | |
2119 | fds, n_fds, | |
2120 | files_env, | |
2121 | &exit_status); | |
2122 | if (r < 0) { | |
4c2630eb | 2123 | log_open(); |
f2341e0a LP |
2124 | log_struct_errno(LOG_ERR, r, |
2125 | LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), | |
2126 | LOG_UNIT_ID(unit), | |
2127 | LOG_UNIT_MESSAGE(unit, "Failed at step %s spawning %s: %m", | |
2128 | exit_status_to_string(exit_status, EXIT_STATUS_SYSTEMD), | |
2129 | command->path), | |
2130 | "EXECUTABLE=%s", command->path, | |
2131 | NULL); | |
4c2630eb MS |
2132 | } |
2133 | ||
ff0af2a1 | 2134 | _exit(exit_status); |
034c6ed7 LP |
2135 | } |
2136 | ||
f2341e0a | 2137 | log_unit_debug(unit, "Forked %s as "PID_FMT, command->path, pid); |
23635a85 | 2138 | |
80876c20 LP |
2139 | /* We add the new process to the cgroup both in the child (so |
2140 | * that we can be sure that no user code is ever executed | |
2141 | * outside of the cgroup) and in the parent (so that we can be | |
2142 | * sure that when we kill the cgroup the process will be | |
2143 | * killed too). */ | |
d35fbf6b | 2144 | if (params->cgroup_path) |
dd305ec9 | 2145 | (void) cg_attach(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, pid); |
2da3263a | 2146 | |
b58b4116 | 2147 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 2148 | |
034c6ed7 | 2149 | *ret = pid; |
5cb5a6ff LP |
2150 | return 0; |
2151 | } | |
2152 | ||
034c6ed7 LP |
2153 | void exec_context_init(ExecContext *c) { |
2154 | assert(c); | |
2155 | ||
4c12626c | 2156 | c->umask = 0022; |
9eba9da4 | 2157 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 2158 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 2159 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 2160 | c->syslog_level_prefix = true; |
353e12c2 | 2161 | c->ignore_sigpipe = true; |
3a43da28 | 2162 | c->timer_slack_nsec = NSEC_INFINITY; |
050f7277 | 2163 | c->personality = PERSONALITY_INVALID; |
e66cf1a3 | 2164 | c->runtime_directory_mode = 0755; |
a103496c | 2165 | c->capability_bounding_set = CAP_ALL; |
034c6ed7 LP |
2166 | } |
2167 | ||
613b411c | 2168 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
2169 | unsigned l; |
2170 | ||
2171 | assert(c); | |
2172 | ||
6796073e LP |
2173 | c->environment = strv_free(c->environment); |
2174 | c->environment_files = strv_free(c->environment_files); | |
b4c14404 | 2175 | c->pass_environment = strv_free(c->pass_environment); |
8c7be95e | 2176 | |
1f6b4113 | 2177 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) |
a1e58e8e | 2178 | c->rlimit[l] = mfree(c->rlimit[l]); |
034c6ed7 | 2179 | |
a1e58e8e LP |
2180 | c->working_directory = mfree(c->working_directory); |
2181 | c->root_directory = mfree(c->root_directory); | |
2182 | c->tty_path = mfree(c->tty_path); | |
2183 | c->syslog_identifier = mfree(c->syslog_identifier); | |
2184 | c->user = mfree(c->user); | |
2185 | c->group = mfree(c->group); | |
034c6ed7 | 2186 | |
6796073e | 2187 | c->supplementary_groups = strv_free(c->supplementary_groups); |
94f04347 | 2188 | |
a1e58e8e | 2189 | c->pam_name = mfree(c->pam_name); |
5b6319dc | 2190 | |
94f04347 LP |
2191 | if (c->capabilities) { |
2192 | cap_free(c->capabilities); | |
2193 | c->capabilities = NULL; | |
2194 | } | |
15ae422b | 2195 | |
6796073e LP |
2196 | c->read_only_dirs = strv_free(c->read_only_dirs); |
2197 | c->read_write_dirs = strv_free(c->read_write_dirs); | |
2198 | c->inaccessible_dirs = strv_free(c->inaccessible_dirs); | |
82c121a4 LP |
2199 | |
2200 | if (c->cpuset) | |
2201 | CPU_FREE(c->cpuset); | |
86a3475b | 2202 | |
a1e58e8e LP |
2203 | c->utmp_id = mfree(c->utmp_id); |
2204 | c->selinux_context = mfree(c->selinux_context); | |
2205 | c->apparmor_profile = mfree(c->apparmor_profile); | |
eef65bf3 | 2206 | |
525d3cc7 LP |
2207 | c->syscall_filter = set_free(c->syscall_filter); |
2208 | c->syscall_archs = set_free(c->syscall_archs); | |
2209 | c->address_families = set_free(c->address_families); | |
e66cf1a3 | 2210 | |
6796073e | 2211 | c->runtime_directory = strv_free(c->runtime_directory); |
bb7dd0b0 DM |
2212 | |
2213 | bus_endpoint_free(c->bus_endpoint); | |
2214 | c->bus_endpoint = NULL; | |
e66cf1a3 LP |
2215 | } |
2216 | ||
2217 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) { | |
2218 | char **i; | |
2219 | ||
2220 | assert(c); | |
2221 | ||
2222 | if (!runtime_prefix) | |
2223 | return 0; | |
2224 | ||
2225 | STRV_FOREACH(i, c->runtime_directory) { | |
2226 | _cleanup_free_ char *p; | |
2227 | ||
2228 | p = strjoin(runtime_prefix, "/", *i, NULL); | |
2229 | if (!p) | |
2230 | return -ENOMEM; | |
2231 | ||
2232 | /* We execute this synchronously, since we need to be | |
2233 | * sure this is gone when we start the service | |
2234 | * next. */ | |
c6878637 | 2235 | (void) rm_rf(p, REMOVE_ROOT); |
e66cf1a3 LP |
2236 | } |
2237 | ||
2238 | return 0; | |
5cb5a6ff LP |
2239 | } |
2240 | ||
43d0fcbd LP |
2241 | void exec_command_done(ExecCommand *c) { |
2242 | assert(c); | |
2243 | ||
a1e58e8e | 2244 | c->path = mfree(c->path); |
43d0fcbd | 2245 | |
6796073e | 2246 | c->argv = strv_free(c->argv); |
43d0fcbd LP |
2247 | } |
2248 | ||
2249 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
2250 | unsigned i; | |
2251 | ||
2252 | for (i = 0; i < n; i++) | |
2253 | exec_command_done(c+i); | |
2254 | } | |
2255 | ||
f1acf85a | 2256 | ExecCommand* exec_command_free_list(ExecCommand *c) { |
5cb5a6ff LP |
2257 | ExecCommand *i; |
2258 | ||
2259 | while ((i = c)) { | |
71fda00f | 2260 | LIST_REMOVE(command, c, i); |
43d0fcbd | 2261 | exec_command_done(i); |
5cb5a6ff LP |
2262 | free(i); |
2263 | } | |
f1acf85a ZJS |
2264 | |
2265 | return NULL; | |
5cb5a6ff LP |
2266 | } |
2267 | ||
034c6ed7 LP |
2268 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
2269 | unsigned i; | |
2270 | ||
f1acf85a ZJS |
2271 | for (i = 0; i < n; i++) |
2272 | c[i] = exec_command_free_list(c[i]); | |
034c6ed7 LP |
2273 | } |
2274 | ||
039f0e70 | 2275 | typedef struct InvalidEnvInfo { |
f2341e0a | 2276 | Unit *unit; |
039f0e70 LP |
2277 | const char *path; |
2278 | } InvalidEnvInfo; | |
2279 | ||
2280 | static void invalid_env(const char *p, void *userdata) { | |
2281 | InvalidEnvInfo *info = userdata; | |
2282 | ||
f2341e0a | 2283 | log_unit_error(info->unit, "Ignoring invalid environment assignment '%s': %s", p, info->path); |
039f0e70 LP |
2284 | } |
2285 | ||
f2341e0a | 2286 | int exec_context_load_environment(Unit *unit, const ExecContext *c, char ***l) { |
8c7be95e LP |
2287 | char **i, **r = NULL; |
2288 | ||
2289 | assert(c); | |
2290 | assert(l); | |
2291 | ||
2292 | STRV_FOREACH(i, c->environment_files) { | |
2293 | char *fn; | |
2294 | int k; | |
2295 | bool ignore = false; | |
2296 | char **p; | |
7fd1b19b | 2297 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 2298 | int count, n; |
8c7be95e LP |
2299 | |
2300 | fn = *i; | |
2301 | ||
2302 | if (fn[0] == '-') { | |
2303 | ignore = true; | |
2304 | fn ++; | |
2305 | } | |
2306 | ||
2307 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
2308 | if (ignore) |
2309 | continue; | |
2310 | ||
2311 | strv_free(r); | |
2312 | return -EINVAL; | |
2313 | } | |
2314 | ||
2bef10ab | 2315 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
2316 | errno = 0; |
2317 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
2318 | if (ignore) |
2319 | continue; | |
8c7be95e | 2320 | |
2bef10ab | 2321 | strv_free(r); |
f5e5c28f | 2322 | return errno > 0 ? -errno : -EINVAL; |
2bef10ab PL |
2323 | } |
2324 | count = pglob.gl_pathc; | |
2325 | if (count == 0) { | |
8c7be95e LP |
2326 | if (ignore) |
2327 | continue; | |
2328 | ||
2329 | strv_free(r); | |
2bef10ab | 2330 | return -EINVAL; |
8c7be95e | 2331 | } |
2bef10ab | 2332 | for (n = 0; n < count; n++) { |
717603e3 | 2333 | k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
2334 | if (k < 0) { |
2335 | if (ignore) | |
2336 | continue; | |
8c7be95e | 2337 | |
2bef10ab | 2338 | strv_free(r); |
2bef10ab | 2339 | return k; |
e9c1ea9d | 2340 | } |
ebc05a09 | 2341 | /* Log invalid environment variables with filename */ |
039f0e70 LP |
2342 | if (p) { |
2343 | InvalidEnvInfo info = { | |
f2341e0a | 2344 | .unit = unit, |
039f0e70 LP |
2345 | .path = pglob.gl_pathv[n] |
2346 | }; | |
2347 | ||
2348 | p = strv_env_clean_with_callback(p, invalid_env, &info); | |
2349 | } | |
8c7be95e | 2350 | |
2bef10ab PL |
2351 | if (r == NULL) |
2352 | r = p; | |
2353 | else { | |
2354 | char **m; | |
8c7be95e | 2355 | |
2bef10ab PL |
2356 | m = strv_env_merge(2, r, p); |
2357 | strv_free(r); | |
2358 | strv_free(p); | |
c84a9488 | 2359 | if (!m) |
2bef10ab | 2360 | return -ENOMEM; |
2bef10ab PL |
2361 | |
2362 | r = m; | |
2363 | } | |
8c7be95e LP |
2364 | } |
2365 | } | |
2366 | ||
2367 | *l = r; | |
2368 | ||
2369 | return 0; | |
2370 | } | |
2371 | ||
6ac8fdc9 | 2372 | static bool tty_may_match_dev_console(const char *tty) { |
e1d75803 | 2373 | _cleanup_free_ char *active = NULL; |
7d6884b6 | 2374 | char *console; |
6ac8fdc9 MS |
2375 | |
2376 | if (startswith(tty, "/dev/")) | |
2377 | tty += 5; | |
2378 | ||
2379 | /* trivial identity? */ | |
2380 | if (streq(tty, "console")) | |
2381 | return true; | |
2382 | ||
2383 | console = resolve_dev_console(&active); | |
2384 | /* if we could not resolve, assume it may */ | |
2385 | if (!console) | |
2386 | return true; | |
2387 | ||
2388 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
e1d75803 | 2389 | return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
2390 | } |
2391 | ||
2392 | bool exec_context_may_touch_console(ExecContext *ec) { | |
2393 | return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate || | |
2394 | is_terminal_input(ec->std_input) || | |
2395 | is_terminal_output(ec->std_output) || | |
2396 | is_terminal_output(ec->std_error)) && | |
2397 | tty_may_match_dev_console(tty_path(ec)); | |
2398 | } | |
2399 | ||
15ae422b LP |
2400 | static void strv_fprintf(FILE *f, char **l) { |
2401 | char **g; | |
2402 | ||
2403 | assert(f); | |
2404 | ||
2405 | STRV_FOREACH(g, l) | |
2406 | fprintf(f, " %s", *g); | |
2407 | } | |
2408 | ||
5cb5a6ff | 2409 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
c2bbd90b | 2410 | char **e, **d; |
94f04347 | 2411 | unsigned i; |
9eba9da4 | 2412 | |
5cb5a6ff LP |
2413 | assert(c); |
2414 | assert(f); | |
2415 | ||
4ad49000 | 2416 | prefix = strempty(prefix); |
5cb5a6ff LP |
2417 | |
2418 | fprintf(f, | |
94f04347 LP |
2419 | "%sUMask: %04o\n" |
2420 | "%sWorkingDirectory: %s\n" | |
451a074f | 2421 | "%sRootDirectory: %s\n" |
15ae422b | 2422 | "%sNonBlocking: %s\n" |
64747e2d | 2423 | "%sPrivateTmp: %s\n" |
4819ff03 | 2424 | "%sPrivateNetwork: %s\n" |
7f112f50 | 2425 | "%sPrivateDevices: %s\n" |
1b8689f9 LP |
2426 | "%sProtectHome: %s\n" |
2427 | "%sProtectSystem: %s\n" | |
3bb07b76 | 2428 | "%sIgnoreSIGPIPE: %s\n", |
5cb5a6ff | 2429 | prefix, c->umask, |
9eba9da4 | 2430 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 2431 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 2432 | prefix, yes_no(c->non_blocking), |
64747e2d | 2433 | prefix, yes_no(c->private_tmp), |
4819ff03 | 2434 | prefix, yes_no(c->private_network), |
7f112f50 | 2435 | prefix, yes_no(c->private_devices), |
1b8689f9 LP |
2436 | prefix, protect_home_to_string(c->protect_home), |
2437 | prefix, protect_system_to_string(c->protect_system), | |
3bb07b76 | 2438 | prefix, yes_no(c->ignore_sigpipe)); |
fb33a393 | 2439 | |
8c7be95e LP |
2440 | STRV_FOREACH(e, c->environment) |
2441 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
2442 | ||
2443 | STRV_FOREACH(e, c->environment_files) | |
2444 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 2445 | |
b4c14404 FB |
2446 | STRV_FOREACH(e, c->pass_environment) |
2447 | fprintf(f, "%sPassEnvironment: %s\n", prefix, *e); | |
2448 | ||
c2bbd90b EV |
2449 | fprintf(f, "%sRuntimeDirectoryMode: %04o\n", prefix, c->runtime_directory_mode); |
2450 | ||
2451 | STRV_FOREACH(d, c->runtime_directory) | |
2452 | fprintf(f, "%sRuntimeDirectory: %s\n", prefix, *d); | |
2453 | ||
fb33a393 LP |
2454 | if (c->nice_set) |
2455 | fprintf(f, | |
2456 | "%sNice: %i\n", | |
2457 | prefix, c->nice); | |
2458 | ||
dd6c17b1 | 2459 | if (c->oom_score_adjust_set) |
fb33a393 | 2460 | fprintf(f, |
dd6c17b1 LP |
2461 | "%sOOMScoreAdjust: %i\n", |
2462 | prefix, c->oom_score_adjust); | |
9eba9da4 | 2463 | |
94f04347 | 2464 | for (i = 0; i < RLIM_NLIMITS; i++) |
3c11da9d EV |
2465 | if (c->rlimit[i]) { |
2466 | fprintf(f, "%s%s: " RLIM_FMT "\n", | |
2467 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); | |
2468 | fprintf(f, "%s%sSoft: " RLIM_FMT "\n", | |
2469 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_cur); | |
2470 | } | |
94f04347 | 2471 | |
f8b69d1d | 2472 | if (c->ioprio_set) { |
1756a011 | 2473 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 2474 | |
1756a011 | 2475 | ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); |
9eba9da4 LP |
2476 | fprintf(f, |
2477 | "%sIOSchedulingClass: %s\n" | |
2478 | "%sIOPriority: %i\n", | |
f8b69d1d | 2479 | prefix, strna(class_str), |
9eba9da4 | 2480 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d | 2481 | } |
94f04347 | 2482 | |
f8b69d1d | 2483 | if (c->cpu_sched_set) { |
1756a011 | 2484 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 2485 | |
1756a011 | 2486 | sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
94f04347 LP |
2487 | fprintf(f, |
2488 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
2489 | "%sCPUSchedulingPriority: %i\n" |
2490 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 2491 | prefix, strna(policy_str), |
38b48754 LP |
2492 | prefix, c->cpu_sched_priority, |
2493 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 2494 | } |
94f04347 | 2495 | |
82c121a4 | 2496 | if (c->cpuset) { |
94f04347 | 2497 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
2498 | for (i = 0; i < c->cpuset_ncpus; i++) |
2499 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
43a99a7a | 2500 | fprintf(f, " %u", i); |
94f04347 LP |
2501 | fputs("\n", f); |
2502 | } | |
2503 | ||
3a43da28 | 2504 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 2505 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
2506 | |
2507 | fprintf(f, | |
80876c20 LP |
2508 | "%sStandardInput: %s\n" |
2509 | "%sStandardOutput: %s\n" | |
2510 | "%sStandardError: %s\n", | |
2511 | prefix, exec_input_to_string(c->std_input), | |
2512 | prefix, exec_output_to_string(c->std_output), | |
2513 | prefix, exec_output_to_string(c->std_error)); | |
2514 | ||
2515 | if (c->tty_path) | |
2516 | fprintf(f, | |
6ea832a2 LP |
2517 | "%sTTYPath: %s\n" |
2518 | "%sTTYReset: %s\n" | |
2519 | "%sTTYVHangup: %s\n" | |
2520 | "%sTTYVTDisallocate: %s\n", | |
2521 | prefix, c->tty_path, | |
2522 | prefix, yes_no(c->tty_reset), | |
2523 | prefix, yes_no(c->tty_vhangup), | |
2524 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 2525 | |
5ce70e5b ZJS |
2526 | if (c->std_output == EXEC_OUTPUT_SYSLOG || |
2527 | c->std_output == EXEC_OUTPUT_KMSG || | |
2528 | c->std_output == EXEC_OUTPUT_JOURNAL || | |
2529 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2530 | c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2531 | c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
2532 | c->std_error == EXEC_OUTPUT_SYSLOG || | |
2533 | c->std_error == EXEC_OUTPUT_KMSG || | |
2534 | c->std_error == EXEC_OUTPUT_JOURNAL || | |
2535 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2536 | c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2537 | c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { | |
f8b69d1d | 2538 | |
5ce70e5b | 2539 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 2540 | |
5ce70e5b ZJS |
2541 | log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
2542 | log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
f8b69d1d | 2543 | |
94f04347 LP |
2544 | fprintf(f, |
2545 | "%sSyslogFacility: %s\n" | |
2546 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
2547 | prefix, strna(fac_str), |
2548 | prefix, strna(lvl_str)); | |
f8b69d1d | 2549 | } |
94f04347 LP |
2550 | |
2551 | if (c->capabilities) { | |
5ce70e5b ZJS |
2552 | _cleanup_cap_free_charp_ char *t; |
2553 | ||
2554 | t = cap_to_text(c->capabilities, NULL); | |
2555 | if (t) | |
2556 | fprintf(f, "%sCapabilities: %s\n", prefix, t); | |
94f04347 LP |
2557 | } |
2558 | ||
2559 | if (c->secure_bits) | |
2560 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
2561 | prefix, | |
cbb21cca ZJS |
2562 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
2563 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
2564 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
2565 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
2566 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
2567 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 | 2568 | |
a103496c | 2569 | if (c->capability_bounding_set != CAP_ALL) { |
ae556c21 | 2570 | unsigned long l; |
260abb78 | 2571 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2572 | |
64685e0c | 2573 | for (l = 0; l <= cap_last_cap(); l++) |
a103496c | 2574 | if (c->capability_bounding_set & (UINT64_C(1) << l)) |
2822da4f | 2575 | fprintf(f, " %s", strna(capability_to_name(l))); |
94f04347 LP |
2576 | |
2577 | fputs("\n", f); | |
755d4b67 IP |
2578 | } |
2579 | ||
2580 | if (c->capability_ambient_set != 0) { | |
2581 | unsigned long l; | |
2582 | fprintf(f, "%sAmbientCapabilities:", prefix); | |
2583 | ||
2584 | for (l = 0; l <= cap_last_cap(); l++) | |
2585 | if (c->capability_ambient_set & (UINT64_C(1) << l)) | |
2586 | fprintf(f, " %s", strna(capability_to_name(l))); | |
2587 | ||
2588 | fputs("\n", f); | |
94f04347 LP |
2589 | } |
2590 | ||
2591 | if (c->user) | |
f2d3769a | 2592 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2593 | if (c->group) |
f2d3769a | 2594 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2595 | |
15ae422b | 2596 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2597 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2598 | strv_fprintf(f, c->supplementary_groups); |
2599 | fputs("\n", f); | |
2600 | } | |
94f04347 | 2601 | |
5b6319dc | 2602 | if (c->pam_name) |
f2d3769a | 2603 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2604 | |
15ae422b LP |
2605 | if (strv_length(c->read_write_dirs) > 0) { |
2606 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2607 | strv_fprintf(f, c->read_write_dirs); | |
2608 | fputs("\n", f); | |
2609 | } | |
2610 | ||
2611 | if (strv_length(c->read_only_dirs) > 0) { | |
2612 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2613 | strv_fprintf(f, c->read_only_dirs); | |
2614 | fputs("\n", f); | |
2615 | } | |
94f04347 | 2616 | |
15ae422b LP |
2617 | if (strv_length(c->inaccessible_dirs) > 0) { |
2618 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2619 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2620 | fputs("\n", f); |
2621 | } | |
2e22afe9 | 2622 | |
169c1bda LP |
2623 | if (c->utmp_id) |
2624 | fprintf(f, | |
2625 | "%sUtmpIdentifier: %s\n", | |
2626 | prefix, c->utmp_id); | |
7b52a628 MS |
2627 | |
2628 | if (c->selinux_context) | |
2629 | fprintf(f, | |
5f8640fb LP |
2630 | "%sSELinuxContext: %s%s\n", |
2631 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 2632 | |
050f7277 | 2633 | if (c->personality != PERSONALITY_INVALID) |
ac45f971 LP |
2634 | fprintf(f, |
2635 | "%sPersonality: %s\n", | |
2636 | prefix, strna(personality_to_string(c->personality))); | |
2637 | ||
17df7223 | 2638 | if (c->syscall_filter) { |
351a19b1 | 2639 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2640 | Iterator j; |
2641 | void *id; | |
2642 | bool first = true; | |
351a19b1 | 2643 | #endif |
17df7223 LP |
2644 | |
2645 | fprintf(f, | |
57183d11 | 2646 | "%sSystemCallFilter: ", |
17df7223 LP |
2647 | prefix); |
2648 | ||
2649 | if (!c->syscall_whitelist) | |
2650 | fputc('~', f); | |
2651 | ||
351a19b1 | 2652 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2653 | SET_FOREACH(id, c->syscall_filter, j) { |
2654 | _cleanup_free_ char *name = NULL; | |
2655 | ||
2656 | if (first) | |
2657 | first = false; | |
2658 | else | |
2659 | fputc(' ', f); | |
2660 | ||
57183d11 | 2661 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 LP |
2662 | fputs(strna(name), f); |
2663 | } | |
351a19b1 | 2664 | #endif |
17df7223 LP |
2665 | |
2666 | fputc('\n', f); | |
2667 | } | |
2668 | ||
57183d11 LP |
2669 | if (c->syscall_archs) { |
2670 | #ifdef HAVE_SECCOMP | |
2671 | Iterator j; | |
2672 | void *id; | |
2673 | #endif | |
2674 | ||
2675 | fprintf(f, | |
2676 | "%sSystemCallArchitectures:", | |
2677 | prefix); | |
2678 | ||
2679 | #ifdef HAVE_SECCOMP | |
2680 | SET_FOREACH(id, c->syscall_archs, j) | |
2681 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); | |
2682 | #endif | |
2683 | fputc('\n', f); | |
2684 | } | |
2685 | ||
b3267152 | 2686 | if (c->syscall_errno > 0) |
17df7223 LP |
2687 | fprintf(f, |
2688 | "%sSystemCallErrorNumber: %s\n", | |
2689 | prefix, strna(errno_to_name(c->syscall_errno))); | |
eef65bf3 MS |
2690 | |
2691 | if (c->apparmor_profile) | |
2692 | fprintf(f, | |
2693 | "%sAppArmorProfile: %s%s\n", | |
2694 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
5cb5a6ff LP |
2695 | } |
2696 | ||
a931ad47 LP |
2697 | bool exec_context_maintains_privileges(ExecContext *c) { |
2698 | assert(c); | |
2699 | ||
2700 | /* Returns true if the process forked off would run run under | |
2701 | * an unchanged UID or as root. */ | |
2702 | ||
2703 | if (!c->user) | |
2704 | return true; | |
2705 | ||
2706 | if (streq(c->user, "root") || streq(c->user, "0")) | |
2707 | return true; | |
2708 | ||
2709 | return false; | |
2710 | } | |
2711 | ||
b58b4116 | 2712 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2713 | assert(s); |
5cb5a6ff | 2714 | |
b58b4116 LP |
2715 | zero(*s); |
2716 | s->pid = pid; | |
2717 | dual_timestamp_get(&s->start_timestamp); | |
2718 | } | |
2719 | ||
6ea832a2 | 2720 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2721 | assert(s); |
2722 | ||
0b1f4ae6 | 2723 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2724 | zero(*s); |
2725 | ||
034c6ed7 | 2726 | s->pid = pid; |
63983207 | 2727 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2728 | |
034c6ed7 LP |
2729 | s->code = code; |
2730 | s->status = status; | |
169c1bda | 2731 | |
6ea832a2 LP |
2732 | if (context) { |
2733 | if (context->utmp_id) | |
2734 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2735 | ||
2736 | exec_context_tty_reset(context); | |
2737 | } | |
9fb86720 LP |
2738 | } |
2739 | ||
2740 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2741 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2742 | ||
2743 | assert(s); | |
2744 | assert(f); | |
2745 | ||
9fb86720 LP |
2746 | if (s->pid <= 0) |
2747 | return; | |
2748 | ||
4c940960 LP |
2749 | prefix = strempty(prefix); |
2750 | ||
9fb86720 | 2751 | fprintf(f, |
ccd06097 ZJS |
2752 | "%sPID: "PID_FMT"\n", |
2753 | prefix, s->pid); | |
9fb86720 | 2754 | |
63983207 | 2755 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2756 | fprintf(f, |
2757 | "%sStart Timestamp: %s\n", | |
63983207 | 2758 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2759 | |
63983207 | 2760 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2761 | fprintf(f, |
2762 | "%sExit Timestamp: %s\n" | |
2763 | "%sExit Code: %s\n" | |
2764 | "%sExit Status: %i\n", | |
63983207 | 2765 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2766 | prefix, sigchld_code_to_string(s->code), |
2767 | prefix, s->status); | |
5cb5a6ff | 2768 | } |
44d8db9e | 2769 | |
9e2f7c11 | 2770 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2771 | size_t k; |
2772 | char *n, *p, **a; | |
2773 | bool first = true; | |
2774 | ||
9e2f7c11 | 2775 | assert(argv); |
44d8db9e | 2776 | |
9164977d | 2777 | k = 1; |
9e2f7c11 | 2778 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2779 | k += strlen(*a)+3; |
2780 | ||
2781 | if (!(n = new(char, k))) | |
2782 | return NULL; | |
2783 | ||
2784 | p = n; | |
9e2f7c11 | 2785 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2786 | |
2787 | if (!first) | |
2788 | *(p++) = ' '; | |
2789 | else | |
2790 | first = false; | |
2791 | ||
2792 | if (strpbrk(*a, WHITESPACE)) { | |
2793 | *(p++) = '\''; | |
2794 | p = stpcpy(p, *a); | |
2795 | *(p++) = '\''; | |
2796 | } else | |
2797 | p = stpcpy(p, *a); | |
2798 | ||
2799 | } | |
2800 | ||
9164977d LP |
2801 | *p = 0; |
2802 | ||
44d8db9e LP |
2803 | /* FIXME: this doesn't really handle arguments that have |
2804 | * spaces and ticks in them */ | |
2805 | ||
2806 | return n; | |
2807 | } | |
2808 | ||
2809 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
e1d75803 | 2810 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 2811 | const char *prefix2; |
44d8db9e LP |
2812 | |
2813 | assert(c); | |
2814 | assert(f); | |
2815 | ||
4c940960 | 2816 | prefix = strempty(prefix); |
63c372cb | 2817 | prefix2 = strjoina(prefix, "\t"); |
44d8db9e | 2818 | |
9e2f7c11 | 2819 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2820 | fprintf(f, |
2821 | "%sCommand Line: %s\n", | |
2822 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2823 | ||
9fb86720 | 2824 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
2825 | } |
2826 | ||
2827 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2828 | assert(f); | |
2829 | ||
4c940960 | 2830 | prefix = strempty(prefix); |
44d8db9e LP |
2831 | |
2832 | LIST_FOREACH(command, c, c) | |
2833 | exec_command_dump(c, f, prefix); | |
2834 | } | |
94f04347 | 2835 | |
a6a80b4f LP |
2836 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2837 | ExecCommand *end; | |
2838 | ||
2839 | assert(l); | |
2840 | assert(e); | |
2841 | ||
2842 | if (*l) { | |
35b8ca3a | 2843 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2844 | LIST_FIND_TAIL(command, *l, end); |
2845 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2846 | } else |
2847 | *l = e; | |
2848 | } | |
2849 | ||
26fd040d LP |
2850 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2851 | va_list ap; | |
2852 | char **l, *p; | |
2853 | ||
2854 | assert(c); | |
2855 | assert(path); | |
2856 | ||
2857 | va_start(ap, path); | |
2858 | l = strv_new_ap(path, ap); | |
2859 | va_end(ap); | |
2860 | ||
2861 | if (!l) | |
2862 | return -ENOMEM; | |
2863 | ||
250a918d LP |
2864 | p = strdup(path); |
2865 | if (!p) { | |
26fd040d LP |
2866 | strv_free(l); |
2867 | return -ENOMEM; | |
2868 | } | |
2869 | ||
2870 | free(c->path); | |
2871 | c->path = p; | |
2872 | ||
2873 | strv_free(c->argv); | |
2874 | c->argv = l; | |
2875 | ||
2876 | return 0; | |
2877 | } | |
2878 | ||
86b23b07 | 2879 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 2880 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 2881 | va_list ap; |
86b23b07 JS |
2882 | int r; |
2883 | ||
2884 | assert(c); | |
2885 | assert(path); | |
2886 | ||
2887 | va_start(ap, path); | |
2888 | l = strv_new_ap(path, ap); | |
2889 | va_end(ap); | |
2890 | ||
2891 | if (!l) | |
2892 | return -ENOMEM; | |
2893 | ||
e287086b | 2894 | r = strv_extend_strv(&c->argv, l, false); |
e63ff941 | 2895 | if (r < 0) |
86b23b07 | 2896 | return r; |
86b23b07 JS |
2897 | |
2898 | return 0; | |
2899 | } | |
2900 | ||
2901 | ||
613b411c LP |
2902 | static int exec_runtime_allocate(ExecRuntime **rt) { |
2903 | ||
2904 | if (*rt) | |
2905 | return 0; | |
2906 | ||
2907 | *rt = new0(ExecRuntime, 1); | |
f146f5e1 | 2908 | if (!*rt) |
613b411c LP |
2909 | return -ENOMEM; |
2910 | ||
2911 | (*rt)->n_ref = 1; | |
2912 | (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1; | |
2913 | ||
2914 | return 0; | |
2915 | } | |
2916 | ||
2917 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) { | |
2918 | int r; | |
2919 | ||
2920 | assert(rt); | |
2921 | assert(c); | |
2922 | assert(id); | |
2923 | ||
2924 | if (*rt) | |
2925 | return 1; | |
2926 | ||
2927 | if (!c->private_network && !c->private_tmp) | |
2928 | return 0; | |
2929 | ||
2930 | r = exec_runtime_allocate(rt); | |
2931 | if (r < 0) | |
2932 | return r; | |
2933 | ||
2934 | if (c->private_network && (*rt)->netns_storage_socket[0] < 0) { | |
2935 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0) | |
2936 | return -errno; | |
2937 | } | |
2938 | ||
2939 | if (c->private_tmp && !(*rt)->tmp_dir) { | |
2940 | r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir); | |
2941 | if (r < 0) | |
2942 | return r; | |
2943 | } | |
2944 | ||
2945 | return 1; | |
2946 | } | |
2947 | ||
2948 | ExecRuntime *exec_runtime_ref(ExecRuntime *r) { | |
2949 | assert(r); | |
2950 | assert(r->n_ref > 0); | |
2951 | ||
2952 | r->n_ref++; | |
2953 | return r; | |
2954 | } | |
2955 | ||
2956 | ExecRuntime *exec_runtime_unref(ExecRuntime *r) { | |
2957 | ||
2958 | if (!r) | |
2959 | return NULL; | |
2960 | ||
2961 | assert(r->n_ref > 0); | |
2962 | ||
2963 | r->n_ref--; | |
f2341e0a LP |
2964 | if (r->n_ref > 0) |
2965 | return NULL; | |
2966 | ||
2967 | free(r->tmp_dir); | |
2968 | free(r->var_tmp_dir); | |
2969 | safe_close_pair(r->netns_storage_socket); | |
2970 | free(r); | |
613b411c LP |
2971 | |
2972 | return NULL; | |
2973 | } | |
2974 | ||
f2341e0a | 2975 | int exec_runtime_serialize(Unit *u, ExecRuntime *rt, FILE *f, FDSet *fds) { |
613b411c LP |
2976 | assert(u); |
2977 | assert(f); | |
2978 | assert(fds); | |
2979 | ||
2980 | if (!rt) | |
2981 | return 0; | |
2982 | ||
2983 | if (rt->tmp_dir) | |
2984 | unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir); | |
2985 | ||
2986 | if (rt->var_tmp_dir) | |
2987 | unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir); | |
2988 | ||
2989 | if (rt->netns_storage_socket[0] >= 0) { | |
2990 | int copy; | |
2991 | ||
2992 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); | |
2993 | if (copy < 0) | |
2994 | return copy; | |
2995 | ||
2996 | unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy); | |
2997 | } | |
2998 | ||
2999 | if (rt->netns_storage_socket[1] >= 0) { | |
3000 | int copy; | |
3001 | ||
3002 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); | |
3003 | if (copy < 0) | |
3004 | return copy; | |
3005 | ||
3006 | unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy); | |
3007 | } | |
3008 | ||
3009 | return 0; | |
3010 | } | |
3011 | ||
f2341e0a | 3012 | int exec_runtime_deserialize_item(Unit *u, ExecRuntime **rt, const char *key, const char *value, FDSet *fds) { |
613b411c LP |
3013 | int r; |
3014 | ||
3015 | assert(rt); | |
3016 | assert(key); | |
3017 | assert(value); | |
3018 | ||
3019 | if (streq(key, "tmp-dir")) { | |
3020 | char *copy; | |
3021 | ||
3022 | r = exec_runtime_allocate(rt); | |
3023 | if (r < 0) | |
f2341e0a | 3024 | return log_oom(); |
613b411c LP |
3025 | |
3026 | copy = strdup(value); | |
3027 | if (!copy) | |
3028 | return log_oom(); | |
3029 | ||
3030 | free((*rt)->tmp_dir); | |
3031 | (*rt)->tmp_dir = copy; | |
3032 | ||
3033 | } else if (streq(key, "var-tmp-dir")) { | |
3034 | char *copy; | |
3035 | ||
3036 | r = exec_runtime_allocate(rt); | |
3037 | if (r < 0) | |
f2341e0a | 3038 | return log_oom(); |
613b411c LP |
3039 | |
3040 | copy = strdup(value); | |
3041 | if (!copy) | |
3042 | return log_oom(); | |
3043 | ||
3044 | free((*rt)->var_tmp_dir); | |
3045 | (*rt)->var_tmp_dir = copy; | |
3046 | ||
3047 | } else if (streq(key, "netns-socket-0")) { | |
3048 | int fd; | |
3049 | ||
3050 | r = exec_runtime_allocate(rt); | |
3051 | if (r < 0) | |
f2341e0a | 3052 | return log_oom(); |
613b411c LP |
3053 | |
3054 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 3055 | log_unit_debug(u, "Failed to parse netns socket value: %s", value); |
613b411c | 3056 | else { |
03e334a1 | 3057 | safe_close((*rt)->netns_storage_socket[0]); |
613b411c LP |
3058 | (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd); |
3059 | } | |
3060 | } else if (streq(key, "netns-socket-1")) { | |
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[1]); |
613b411c LP |
3071 | (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd); |
3072 | } | |
3073 | } else | |
3074 | return 0; | |
3075 | ||
3076 | return 1; | |
3077 | } | |
3078 | ||
3079 | static void *remove_tmpdir_thread(void *p) { | |
3080 | _cleanup_free_ char *path = p; | |
3081 | ||
c6878637 | 3082 | (void) rm_rf(path, REMOVE_ROOT|REMOVE_PHYSICAL); |
613b411c LP |
3083 | return NULL; |
3084 | } | |
3085 | ||
3086 | void exec_runtime_destroy(ExecRuntime *rt) { | |
98b47d54 LP |
3087 | int r; |
3088 | ||
613b411c LP |
3089 | if (!rt) |
3090 | return; | |
3091 | ||
3092 | /* If there are multiple users of this, let's leave the stuff around */ | |
3093 | if (rt->n_ref > 1) | |
3094 | return; | |
3095 | ||
3096 | if (rt->tmp_dir) { | |
3097 | log_debug("Spawning thread to nuke %s", rt->tmp_dir); | |
98b47d54 LP |
3098 | |
3099 | r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir); | |
3100 | if (r < 0) { | |
da927ba9 | 3101 | log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir); |
98b47d54 LP |
3102 | free(rt->tmp_dir); |
3103 | } | |
3104 | ||
613b411c LP |
3105 | rt->tmp_dir = NULL; |
3106 | } | |
3107 | ||
3108 | if (rt->var_tmp_dir) { | |
3109 | log_debug("Spawning thread to nuke %s", rt->var_tmp_dir); | |
98b47d54 LP |
3110 | |
3111 | r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir); | |
3112 | if (r < 0) { | |
da927ba9 | 3113 | log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir); |
98b47d54 LP |
3114 | free(rt->var_tmp_dir); |
3115 | } | |
3116 | ||
613b411c LP |
3117 | rt->var_tmp_dir = NULL; |
3118 | } | |
3119 | ||
3d94f76c | 3120 | safe_close_pair(rt->netns_storage_socket); |
613b411c LP |
3121 | } |
3122 | ||
80876c20 LP |
3123 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
3124 | [EXEC_INPUT_NULL] = "null", | |
3125 | [EXEC_INPUT_TTY] = "tty", | |
3126 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
3127 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
3128 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
3129 | }; |
3130 | ||
8a0867d6 LP |
3131 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
3132 | ||
94f04347 | 3133 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 3134 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 3135 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 3136 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 3137 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 3138 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 3139 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 3140 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
3141 | [EXEC_OUTPUT_JOURNAL] = "journal", |
3142 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 3143 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
3144 | }; |
3145 | ||
3146 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); | |
023a4f67 LP |
3147 | |
3148 | static const char* const exec_utmp_mode_table[_EXEC_UTMP_MODE_MAX] = { | |
3149 | [EXEC_UTMP_INIT] = "init", | |
3150 | [EXEC_UTMP_LOGIN] = "login", | |
3151 | [EXEC_UTMP_USER] = "user", | |
3152 | }; | |
3153 | ||
3154 | DEFINE_STRING_TABLE_LOOKUP(exec_utmp_mode, ExecUtmpMode); |