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Commit | Line | Data |
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a7334b09 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
a7334b09 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
034c6ed7 LP |
20 | #include <errno.h> |
21 | #include <fcntl.h> | |
8dd4c05b LP |
22 | #include <glob.h> |
23 | #include <grp.h> | |
24 | #include <poll.h> | |
309bff19 | 25 | #include <signal.h> |
8dd4c05b | 26 | #include <string.h> |
19c0b0b9 | 27 | #include <sys/capability.h> |
f3e43635 | 28 | #include <sys/mman.h> |
8dd4c05b | 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" | |
8dd4c05b | 62 | #include "cap-list.h" |
430f0182 | 63 | #include "capability-util.h" |
f6a6225e | 64 | #include "def.h" |
4d1a6904 | 65 | #include "env-util.h" |
17df7223 | 66 | #include "errno-list.h" |
3ffd4af2 | 67 | #include "execute.h" |
8dd4c05b | 68 | #include "exit-status.h" |
3ffd4af2 | 69 | #include "fd-util.h" |
8dd4c05b | 70 | #include "fileio.h" |
6482f626 | 71 | #include "formats-util.h" |
f4f15635 | 72 | #include "fs-util.h" |
7d50b32a | 73 | #include "glob-util.h" |
c004493c | 74 | #include "io-util.h" |
8dd4c05b LP |
75 | #include "ioprio.h" |
76 | #include "log.h" | |
77 | #include "macro.h" | |
78 | #include "missing.h" | |
79 | #include "mkdir.h" | |
80 | #include "namespace.h" | |
6bedfcbb | 81 | #include "parse-util.h" |
8dd4c05b | 82 | #include "path-util.h" |
0b452006 | 83 | #include "process-util.h" |
78f22b97 | 84 | #include "rlimit-util.h" |
8dd4c05b | 85 | #include "rm-rf.h" |
3ffd4af2 LP |
86 | #ifdef HAVE_SECCOMP |
87 | #include "seccomp-util.h" | |
88 | #endif | |
8dd4c05b LP |
89 | #include "securebits.h" |
90 | #include "selinux-util.h" | |
24882e06 | 91 | #include "signal-util.h" |
8dd4c05b | 92 | #include "smack-util.h" |
8b43440b | 93 | #include "string-table.h" |
07630cea | 94 | #include "string-util.h" |
8dd4c05b | 95 | #include "strv.h" |
7ccbd1ae | 96 | #include "syslog-util.h" |
8dd4c05b LP |
97 | #include "terminal-util.h" |
98 | #include "unit.h" | |
b1d4f8e1 | 99 | #include "user-util.h" |
8dd4c05b LP |
100 | #include "util.h" |
101 | #include "utmp-wtmp.h" | |
5cb5a6ff | 102 | |
e056b01d | 103 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 104 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 105 | |
02a51aba LP |
106 | /* This assumes there is a 'tty' group */ |
107 | #define TTY_MODE 0620 | |
108 | ||
531dca78 LP |
109 | #define SNDBUF_SIZE (8*1024*1024) |
110 | ||
034c6ed7 LP |
111 | static int shift_fds(int fds[], unsigned n_fds) { |
112 | int start, restart_from; | |
113 | ||
114 | if (n_fds <= 0) | |
115 | return 0; | |
116 | ||
a0d40ac5 LP |
117 | /* Modifies the fds array! (sorts it) */ |
118 | ||
034c6ed7 LP |
119 | assert(fds); |
120 | ||
121 | start = 0; | |
122 | for (;;) { | |
123 | int i; | |
124 | ||
125 | restart_from = -1; | |
126 | ||
127 | for (i = start; i < (int) n_fds; i++) { | |
128 | int nfd; | |
129 | ||
130 | /* Already at right index? */ | |
131 | if (fds[i] == i+3) | |
132 | continue; | |
133 | ||
3cc2aff1 LP |
134 | nfd = fcntl(fds[i], F_DUPFD, i + 3); |
135 | if (nfd < 0) | |
034c6ed7 LP |
136 | return -errno; |
137 | ||
03e334a1 | 138 | safe_close(fds[i]); |
034c6ed7 LP |
139 | fds[i] = nfd; |
140 | ||
141 | /* Hmm, the fd we wanted isn't free? Then | |
ee33e53a | 142 | * let's remember that and try again from here */ |
034c6ed7 LP |
143 | if (nfd != i+3 && restart_from < 0) |
144 | restart_from = i; | |
145 | } | |
146 | ||
147 | if (restart_from < 0) | |
148 | break; | |
149 | ||
150 | start = restart_from; | |
151 | } | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
c2748801 | 156 | static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) { |
47a71eed | 157 | unsigned i; |
e2c76839 | 158 | int r; |
47a71eed LP |
159 | |
160 | if (n_fds <= 0) | |
161 | return 0; | |
162 | ||
163 | assert(fds); | |
164 | ||
451a074f | 165 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */ |
47a71eed LP |
166 | |
167 | for (i = 0; i < n_fds; i++) { | |
47a71eed | 168 | |
3cc2aff1 LP |
169 | r = fd_nonblock(fds[i], nonblock); |
170 | if (r < 0) | |
e2c76839 | 171 | return r; |
47a71eed | 172 | |
451a074f LP |
173 | /* We unconditionally drop FD_CLOEXEC from the fds, |
174 | * since after all we want to pass these fds to our | |
175 | * children */ | |
47a71eed | 176 | |
3cc2aff1 LP |
177 | r = fd_cloexec(fds[i], false); |
178 | if (r < 0) | |
e2c76839 | 179 | return r; |
47a71eed LP |
180 | } |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
1e22b5cd | 185 | static const char *exec_context_tty_path(const ExecContext *context) { |
80876c20 LP |
186 | assert(context); |
187 | ||
1e22b5cd LP |
188 | if (context->stdio_as_fds) |
189 | return NULL; | |
190 | ||
80876c20 LP |
191 | if (context->tty_path) |
192 | return context->tty_path; | |
193 | ||
194 | return "/dev/console"; | |
195 | } | |
196 | ||
1e22b5cd LP |
197 | static void exec_context_tty_reset(const ExecContext *context, const ExecParameters *p) { |
198 | const char *path; | |
199 | ||
6ea832a2 LP |
200 | assert(context); |
201 | ||
1e22b5cd | 202 | path = exec_context_tty_path(context); |
6ea832a2 | 203 | |
1e22b5cd LP |
204 | if (context->tty_vhangup) { |
205 | if (p && p->stdin_fd >= 0) | |
206 | (void) terminal_vhangup_fd(p->stdin_fd); | |
207 | else if (path) | |
208 | (void) terminal_vhangup(path); | |
209 | } | |
6ea832a2 | 210 | |
1e22b5cd LP |
211 | if (context->tty_reset) { |
212 | if (p && p->stdin_fd >= 0) | |
213 | (void) reset_terminal_fd(p->stdin_fd, true); | |
214 | else if (path) | |
215 | (void) reset_terminal(path); | |
216 | } | |
217 | ||
218 | if (context->tty_vt_disallocate && path) | |
219 | (void) vt_disallocate(path); | |
6ea832a2 LP |
220 | } |
221 | ||
3a1286b6 MS |
222 | static bool is_terminal_output(ExecOutput o) { |
223 | return | |
224 | o == EXEC_OUTPUT_TTY || | |
225 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
226 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
227 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
228 | } | |
229 | ||
80876c20 LP |
230 | static int open_null_as(int flags, int nfd) { |
231 | int fd, r; | |
071830ff | 232 | |
80876c20 | 233 | assert(nfd >= 0); |
071830ff | 234 | |
613b411c LP |
235 | fd = open("/dev/null", flags|O_NOCTTY); |
236 | if (fd < 0) | |
071830ff LP |
237 | return -errno; |
238 | ||
80876c20 LP |
239 | if (fd != nfd) { |
240 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 241 | safe_close(fd); |
80876c20 LP |
242 | } else |
243 | r = nfd; | |
071830ff | 244 | |
80876c20 | 245 | return r; |
071830ff LP |
246 | } |
247 | ||
524daa8c | 248 | static int connect_journal_socket(int fd, uid_t uid, gid_t gid) { |
b92bea5d ZJS |
249 | union sockaddr_union sa = { |
250 | .un.sun_family = AF_UNIX, | |
251 | .un.sun_path = "/run/systemd/journal/stdout", | |
252 | }; | |
524daa8c ZJS |
253 | uid_t olduid = UID_INVALID; |
254 | gid_t oldgid = GID_INVALID; | |
255 | int r; | |
256 | ||
257 | if (gid != GID_INVALID) { | |
258 | oldgid = getgid(); | |
259 | ||
260 | r = setegid(gid); | |
261 | if (r < 0) | |
262 | return -errno; | |
263 | } | |
264 | ||
265 | if (uid != UID_INVALID) { | |
266 | olduid = getuid(); | |
267 | ||
268 | r = seteuid(uid); | |
269 | if (r < 0) { | |
270 | r = -errno; | |
271 | goto restore_gid; | |
272 | } | |
273 | } | |
274 | ||
fc2fffe7 | 275 | r = connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)); |
524daa8c ZJS |
276 | if (r < 0) |
277 | r = -errno; | |
278 | ||
279 | /* If we fail to restore the uid or gid, things will likely | |
280 | fail later on. This should only happen if an LSM interferes. */ | |
281 | ||
282 | if (uid != UID_INVALID) | |
283 | (void) seteuid(olduid); | |
284 | ||
285 | restore_gid: | |
286 | if (gid != GID_INVALID) | |
287 | (void) setegid(oldgid); | |
288 | ||
289 | return r; | |
290 | } | |
291 | ||
fd1f9c89 LP |
292 | static int connect_logger_as( |
293 | const ExecContext *context, | |
294 | ExecOutput output, | |
295 | const char *ident, | |
296 | const char *unit_id, | |
297 | int nfd, | |
298 | uid_t uid, | |
299 | gid_t gid) { | |
300 | ||
524daa8c | 301 | int fd, r; |
071830ff LP |
302 | |
303 | assert(context); | |
80876c20 LP |
304 | assert(output < _EXEC_OUTPUT_MAX); |
305 | assert(ident); | |
306 | assert(nfd >= 0); | |
071830ff | 307 | |
54fe0cdb LP |
308 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
309 | if (fd < 0) | |
80876c20 | 310 | return -errno; |
071830ff | 311 | |
524daa8c ZJS |
312 | r = connect_journal_socket(fd, uid, gid); |
313 | if (r < 0) | |
314 | return r; | |
071830ff | 315 | |
80876c20 | 316 | if (shutdown(fd, SHUT_RD) < 0) { |
03e334a1 | 317 | safe_close(fd); |
80876c20 LP |
318 | return -errno; |
319 | } | |
071830ff | 320 | |
fd1f9c89 | 321 | (void) fd_inc_sndbuf(fd, SNDBUF_SIZE); |
531dca78 | 322 | |
80876c20 | 323 | dprintf(fd, |
62bca2c6 | 324 | "%s\n" |
80876c20 LP |
325 | "%s\n" |
326 | "%i\n" | |
54fe0cdb LP |
327 | "%i\n" |
328 | "%i\n" | |
329 | "%i\n" | |
4f4a1dbf | 330 | "%i\n", |
4f4a1dbf | 331 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 332 | unit_id, |
54fe0cdb LP |
333 | context->syslog_priority, |
334 | !!context->syslog_level_prefix, | |
335 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
336 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 337 | is_terminal_output(output)); |
80876c20 | 338 | |
fd1f9c89 LP |
339 | if (fd == nfd) |
340 | return nfd; | |
341 | ||
342 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
343 | safe_close(fd); | |
071830ff | 344 | |
80876c20 LP |
345 | return r; |
346 | } | |
347 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
348 | int fd, r; | |
071830ff | 349 | |
80876c20 LP |
350 | assert(path); |
351 | assert(nfd >= 0); | |
071830ff | 352 | |
3cc2aff1 LP |
353 | fd = open_terminal(path, mode | O_NOCTTY); |
354 | if (fd < 0) | |
80876c20 | 355 | return fd; |
071830ff | 356 | |
80876c20 LP |
357 | if (fd != nfd) { |
358 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 359 | safe_close(fd); |
80876c20 LP |
360 | } else |
361 | r = nfd; | |
071830ff | 362 | |
80876c20 LP |
363 | return r; |
364 | } | |
071830ff | 365 | |
80876c20 LP |
366 | static bool is_terminal_input(ExecInput i) { |
367 | return | |
368 | i == EXEC_INPUT_TTY || | |
369 | i == EXEC_INPUT_TTY_FORCE || | |
370 | i == EXEC_INPUT_TTY_FAIL; | |
371 | } | |
071830ff | 372 | |
1e3ad081 LP |
373 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
374 | ||
375 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
376 | return EXEC_INPUT_NULL; | |
071830ff | 377 | |
03fd9c49 | 378 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
379 | return EXEC_INPUT_NULL; |
380 | ||
03fd9c49 | 381 | return std_input; |
4f2d528d LP |
382 | } |
383 | ||
03fd9c49 | 384 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 385 | |
03fd9c49 | 386 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
387 | return EXEC_OUTPUT_INHERIT; |
388 | ||
03fd9c49 | 389 | return std_output; |
4f2d528d LP |
390 | } |
391 | ||
a34ceba6 LP |
392 | static int setup_input( |
393 | const ExecContext *context, | |
394 | const ExecParameters *params, | |
395 | int socket_fd) { | |
396 | ||
4f2d528d LP |
397 | ExecInput i; |
398 | ||
399 | assert(context); | |
a34ceba6 LP |
400 | assert(params); |
401 | ||
402 | if (params->stdin_fd >= 0) { | |
403 | if (dup2(params->stdin_fd, STDIN_FILENO) < 0) | |
404 | return -errno; | |
405 | ||
406 | /* Try to make this the controlling tty, if it is a tty, and reset it */ | |
407 | (void) ioctl(STDIN_FILENO, TIOCSCTTY, context->std_input == EXEC_INPUT_TTY_FORCE); | |
408 | (void) reset_terminal_fd(STDIN_FILENO, true); | |
409 | ||
410 | return STDIN_FILENO; | |
411 | } | |
4f2d528d | 412 | |
a34ceba6 | 413 | i = fixup_input(context->std_input, socket_fd, params->apply_tty_stdin); |
4f2d528d LP |
414 | |
415 | switch (i) { | |
071830ff | 416 | |
80876c20 LP |
417 | case EXEC_INPUT_NULL: |
418 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
419 | ||
420 | case EXEC_INPUT_TTY: | |
421 | case EXEC_INPUT_TTY_FORCE: | |
422 | case EXEC_INPUT_TTY_FAIL: { | |
423 | int fd, r; | |
071830ff | 424 | |
1e22b5cd | 425 | fd = acquire_terminal(exec_context_tty_path(context), |
970edce6 ZJS |
426 | i == EXEC_INPUT_TTY_FAIL, |
427 | i == EXEC_INPUT_TTY_FORCE, | |
428 | false, | |
3a43da28 | 429 | USEC_INFINITY); |
970edce6 | 430 | if (fd < 0) |
80876c20 LP |
431 | return fd; |
432 | ||
433 | if (fd != STDIN_FILENO) { | |
434 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
03e334a1 | 435 | safe_close(fd); |
80876c20 LP |
436 | } else |
437 | r = STDIN_FILENO; | |
438 | ||
439 | return r; | |
440 | } | |
441 | ||
4f2d528d LP |
442 | case EXEC_INPUT_SOCKET: |
443 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
444 | ||
80876c20 LP |
445 | default: |
446 | assert_not_reached("Unknown input type"); | |
447 | } | |
448 | } | |
449 | ||
a34ceba6 LP |
450 | static int setup_output( |
451 | Unit *unit, | |
452 | const ExecContext *context, | |
453 | const ExecParameters *params, | |
454 | int fileno, | |
455 | int socket_fd, | |
456 | const char *ident, | |
7bce046b LP |
457 | uid_t uid, |
458 | gid_t gid, | |
459 | dev_t *journal_stream_dev, | |
460 | ino_t *journal_stream_ino) { | |
a34ceba6 | 461 | |
4f2d528d LP |
462 | ExecOutput o; |
463 | ExecInput i; | |
47c1d80d | 464 | int r; |
4f2d528d | 465 | |
f2341e0a | 466 | assert(unit); |
80876c20 | 467 | assert(context); |
a34ceba6 | 468 | assert(params); |
80876c20 | 469 | assert(ident); |
7bce046b LP |
470 | assert(journal_stream_dev); |
471 | assert(journal_stream_ino); | |
80876c20 | 472 | |
a34ceba6 LP |
473 | if (fileno == STDOUT_FILENO && params->stdout_fd >= 0) { |
474 | ||
475 | if (dup2(params->stdout_fd, STDOUT_FILENO) < 0) | |
476 | return -errno; | |
477 | ||
478 | return STDOUT_FILENO; | |
479 | } | |
480 | ||
481 | if (fileno == STDERR_FILENO && params->stderr_fd >= 0) { | |
482 | if (dup2(params->stderr_fd, STDERR_FILENO) < 0) | |
483 | return -errno; | |
484 | ||
485 | return STDERR_FILENO; | |
486 | } | |
487 | ||
488 | i = fixup_input(context->std_input, socket_fd, params->apply_tty_stdin); | |
03fd9c49 | 489 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 490 | |
eb17e935 MS |
491 | if (fileno == STDERR_FILENO) { |
492 | ExecOutput e; | |
493 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 494 | |
eb17e935 MS |
495 | /* This expects the input and output are already set up */ |
496 | ||
497 | /* Don't change the stderr file descriptor if we inherit all | |
498 | * the way and are not on a tty */ | |
499 | if (e == EXEC_OUTPUT_INHERIT && | |
500 | o == EXEC_OUTPUT_INHERIT && | |
501 | i == EXEC_INPUT_NULL && | |
502 | !is_terminal_input(context->std_input) && | |
503 | getppid () != 1) | |
504 | return fileno; | |
505 | ||
506 | /* Duplicate from stdout if possible */ | |
507 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
508 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 509 | |
eb17e935 | 510 | o = e; |
80876c20 | 511 | |
eb17e935 | 512 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
513 | /* If input got downgraded, inherit the original value */ |
514 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
1e22b5cd | 515 | return open_terminal_as(exec_context_tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 516 | |
acb591e4 | 517 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 518 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 519 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 520 | |
acb591e4 LP |
521 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
522 | if (getppid() != 1) | |
eb17e935 | 523 | return fileno; |
94f04347 | 524 | |
eb17e935 MS |
525 | /* We need to open /dev/null here anew, to get the right access mode. */ |
526 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 527 | } |
94f04347 | 528 | |
eb17e935 | 529 | switch (o) { |
80876c20 LP |
530 | |
531 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 532 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
533 | |
534 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 535 | if (is_terminal_input(i)) |
eb17e935 | 536 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
537 | |
538 | /* We don't reset the terminal if this is just about output */ | |
1e22b5cd | 539 | return open_terminal_as(exec_context_tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
540 | |
541 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 542 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 543 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 544 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
545 | case EXEC_OUTPUT_JOURNAL: |
546 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
f2341e0a | 547 | r = connect_logger_as(context, o, ident, unit->id, fileno, uid, gid); |
47c1d80d | 548 | if (r < 0) { |
f2341e0a | 549 | log_unit_error_errno(unit, r, "Failed to connect %s to the journal socket, ignoring: %m", fileno == STDOUT_FILENO ? "stdout" : "stderr"); |
eb17e935 | 550 | r = open_null_as(O_WRONLY, fileno); |
7bce046b LP |
551 | } else { |
552 | struct stat st; | |
553 | ||
554 | /* If we connected this fd to the journal via a stream, patch the device/inode into the passed | |
555 | * parameters, but only then. This is useful so that we can set $JOURNAL_STREAM that permits | |
556 | * services to detect whether they are connected to the journal or not. */ | |
557 | ||
558 | if (fstat(fileno, &st) >= 0) { | |
559 | *journal_stream_dev = st.st_dev; | |
560 | *journal_stream_ino = st.st_ino; | |
561 | } | |
47c1d80d MS |
562 | } |
563 | return r; | |
4f2d528d LP |
564 | |
565 | case EXEC_OUTPUT_SOCKET: | |
566 | assert(socket_fd >= 0); | |
eb17e935 | 567 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
568 | |
569 | default: | |
80876c20 | 570 | assert_not_reached("Unknown error type"); |
94f04347 | 571 | } |
071830ff LP |
572 | } |
573 | ||
02a51aba LP |
574 | static int chown_terminal(int fd, uid_t uid) { |
575 | struct stat st; | |
576 | ||
577 | assert(fd >= 0); | |
02a51aba | 578 | |
1ff74fb6 LP |
579 | /* Before we chown/chmod the TTY, let's ensure this is actually a tty */ |
580 | if (isatty(fd) < 1) | |
581 | return 0; | |
582 | ||
02a51aba | 583 | /* This might fail. What matters are the results. */ |
bab45044 LP |
584 | (void) fchown(fd, uid, -1); |
585 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
586 | |
587 | if (fstat(fd, &st) < 0) | |
588 | return -errno; | |
589 | ||
d8b4e2e9 | 590 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
591 | return -EPERM; |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
3d18b167 LP |
596 | static int setup_confirm_stdio(int *_saved_stdin, int *_saved_stdout) { |
597 | _cleanup_close_ int fd = -1, saved_stdin = -1, saved_stdout = -1; | |
598 | int r; | |
80876c20 | 599 | |
80876c20 LP |
600 | assert(_saved_stdin); |
601 | assert(_saved_stdout); | |
602 | ||
af6da548 LP |
603 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
604 | if (saved_stdin < 0) | |
605 | return -errno; | |
80876c20 | 606 | |
af6da548 | 607 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
3d18b167 LP |
608 | if (saved_stdout < 0) |
609 | return -errno; | |
80876c20 | 610 | |
af6da548 LP |
611 | fd = acquire_terminal( |
612 | "/dev/console", | |
613 | false, | |
614 | false, | |
615 | false, | |
616 | DEFAULT_CONFIRM_USEC); | |
3d18b167 LP |
617 | if (fd < 0) |
618 | return fd; | |
80876c20 | 619 | |
af6da548 LP |
620 | r = chown_terminal(fd, getuid()); |
621 | if (r < 0) | |
3d18b167 | 622 | return r; |
02a51aba | 623 | |
3d18b167 LP |
624 | r = reset_terminal_fd(fd, true); |
625 | if (r < 0) | |
626 | return r; | |
80876c20 | 627 | |
3d18b167 LP |
628 | if (dup2(fd, STDIN_FILENO) < 0) |
629 | return -errno; | |
630 | ||
631 | if (dup2(fd, STDOUT_FILENO) < 0) | |
632 | return -errno; | |
80876c20 LP |
633 | |
634 | if (fd >= 2) | |
03e334a1 | 635 | safe_close(fd); |
3d18b167 | 636 | fd = -1; |
80876c20 LP |
637 | |
638 | *_saved_stdin = saved_stdin; | |
639 | *_saved_stdout = saved_stdout; | |
640 | ||
3d18b167 | 641 | saved_stdin = saved_stdout = -1; |
80876c20 | 642 | |
3d18b167 | 643 | return 0; |
80876c20 LP |
644 | } |
645 | ||
44b601bc | 646 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
03e334a1 | 647 | _cleanup_close_ int fd = -1; |
af6da548 | 648 | va_list ap; |
80876c20 | 649 | |
af6da548 | 650 | assert(format); |
80876c20 | 651 | |
af6da548 LP |
652 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
653 | if (fd < 0) | |
654 | return fd; | |
80876c20 | 655 | |
af6da548 LP |
656 | va_start(ap, format); |
657 | vdprintf(fd, format, ap); | |
658 | va_end(ap); | |
80876c20 | 659 | |
af6da548 LP |
660 | return 0; |
661 | } | |
80876c20 | 662 | |
3d18b167 | 663 | static int restore_confirm_stdio(int *saved_stdin, int *saved_stdout) { |
af6da548 | 664 | int r = 0; |
80876c20 | 665 | |
af6da548 LP |
666 | assert(saved_stdin); |
667 | assert(saved_stdout); | |
668 | ||
669 | release_terminal(); | |
670 | ||
671 | if (*saved_stdin >= 0) | |
80876c20 | 672 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 673 | r = -errno; |
80876c20 | 674 | |
af6da548 | 675 | if (*saved_stdout >= 0) |
80876c20 | 676 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 677 | r = -errno; |
80876c20 | 678 | |
3d18b167 LP |
679 | *saved_stdin = safe_close(*saved_stdin); |
680 | *saved_stdout = safe_close(*saved_stdout); | |
af6da548 LP |
681 | |
682 | return r; | |
683 | } | |
684 | ||
685 | static int ask_for_confirmation(char *response, char **argv) { | |
686 | int saved_stdout = -1, saved_stdin = -1, r; | |
e1d75803 | 687 | _cleanup_free_ char *line = NULL; |
af6da548 LP |
688 | |
689 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
690 | if (r < 0) | |
691 | return r; | |
692 | ||
693 | line = exec_command_line(argv); | |
694 | if (!line) | |
695 | return -ENOMEM; | |
696 | ||
418b9be5 | 697 | r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line); |
af6da548 LP |
698 | |
699 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
700 | ||
701 | return r; | |
80876c20 LP |
702 | } |
703 | ||
81a2b7ce LP |
704 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
705 | bool keep_groups = false; | |
706 | int r; | |
707 | ||
708 | assert(context); | |
709 | ||
35b8ca3a | 710 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
711 | * we avoid NSS lookups for gid=0. */ |
712 | ||
713 | if (context->group || username) { | |
81a2b7ce LP |
714 | /* First step, initialize groups from /etc/groups */ |
715 | if (username && gid != 0) { | |
716 | if (initgroups(username, gid) < 0) | |
717 | return -errno; | |
718 | ||
719 | keep_groups = true; | |
720 | } | |
721 | ||
722 | /* Second step, set our gids */ | |
723 | if (setresgid(gid, gid, gid) < 0) | |
724 | return -errno; | |
725 | } | |
726 | ||
727 | if (context->supplementary_groups) { | |
728 | int ngroups_max, k; | |
729 | gid_t *gids; | |
730 | char **i; | |
731 | ||
732 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 733 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
734 | |
735 | if (!(gids = new(gid_t, ngroups_max))) | |
736 | return -ENOMEM; | |
737 | ||
738 | if (keep_groups) { | |
3cc2aff1 LP |
739 | k = getgroups(ngroups_max, gids); |
740 | if (k < 0) { | |
81a2b7ce LP |
741 | free(gids); |
742 | return -errno; | |
743 | } | |
744 | } else | |
745 | k = 0; | |
746 | ||
747 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 748 | const char *g; |
81a2b7ce LP |
749 | |
750 | if (k >= ngroups_max) { | |
751 | free(gids); | |
752 | return -E2BIG; | |
753 | } | |
754 | ||
4b67834e LP |
755 | g = *i; |
756 | r = get_group_creds(&g, gids+k); | |
757 | if (r < 0) { | |
81a2b7ce LP |
758 | free(gids); |
759 | return r; | |
760 | } | |
761 | ||
762 | k++; | |
763 | } | |
764 | ||
765 | if (setgroups(k, gids) < 0) { | |
766 | free(gids); | |
767 | return -errno; | |
768 | } | |
769 | ||
770 | free(gids); | |
771 | } | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
776 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
81a2b7ce LP |
777 | assert(context); |
778 | ||
479050b3 | 779 | /* Sets (but doesn't look up) the uid and make sure we keep the |
81a2b7ce LP |
780 | * capabilities while doing so. */ |
781 | ||
479050b3 | 782 | if (context->capability_ambient_set != 0) { |
81a2b7ce LP |
783 | |
784 | /* First step: If we need to keep capabilities but | |
785 | * drop privileges we need to make sure we keep our | |
cbb21cca | 786 | * caps, while we drop privileges. */ |
693ced48 | 787 | if (uid != 0) { |
cbb21cca | 788 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
789 | |
790 | if (prctl(PR_GET_SECUREBITS) != sb) | |
791 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
792 | return -errno; | |
793 | } | |
81a2b7ce LP |
794 | } |
795 | ||
479050b3 | 796 | /* Second step: actually set the uids */ |
81a2b7ce LP |
797 | if (setresuid(uid, uid, uid) < 0) |
798 | return -errno; | |
799 | ||
800 | /* At this point we should have all necessary capabilities but | |
801 | are otherwise a normal user. However, the caps might got | |
802 | corrupted due to the setresuid() so we need clean them up | |
803 | later. This is done outside of this call. */ | |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
5b6319dc LP |
808 | #ifdef HAVE_PAM |
809 | ||
810 | static int null_conv( | |
811 | int num_msg, | |
812 | const struct pam_message **msg, | |
813 | struct pam_response **resp, | |
814 | void *appdata_ptr) { | |
815 | ||
816 | /* We don't support conversations */ | |
817 | ||
818 | return PAM_CONV_ERR; | |
819 | } | |
820 | ||
821 | static int setup_pam( | |
822 | const char *name, | |
823 | const char *user, | |
940c5210 | 824 | uid_t uid, |
5b6319dc | 825 | const char *tty, |
2065ca69 | 826 | char ***env, |
5b6319dc LP |
827 | int fds[], unsigned n_fds) { |
828 | ||
829 | static const struct pam_conv conv = { | |
830 | .conv = null_conv, | |
831 | .appdata_ptr = NULL | |
832 | }; | |
833 | ||
2d7c6aa2 | 834 | _cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL; |
5b6319dc | 835 | pam_handle_t *handle = NULL; |
d6e5f3ad | 836 | sigset_t old_ss; |
7bb70b6e | 837 | int pam_code = PAM_SUCCESS, r; |
5b6319dc LP |
838 | char **e = NULL; |
839 | bool close_session = false; | |
840 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 841 | int flags = 0; |
5b6319dc LP |
842 | |
843 | assert(name); | |
844 | assert(user); | |
2065ca69 | 845 | assert(env); |
5b6319dc LP |
846 | |
847 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 848 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
849 | * systemd via the cgroup logic. It will then remove the PAM |
850 | * session again. The parent process will exec() the actual | |
851 | * daemon. We do things this way to ensure that the main PID | |
852 | * of the daemon is the one we initially fork()ed. */ | |
853 | ||
7bb70b6e LP |
854 | r = barrier_create(&barrier); |
855 | if (r < 0) | |
2d7c6aa2 DH |
856 | goto fail; |
857 | ||
553d2243 | 858 | if (log_get_max_level() < LOG_DEBUG) |
970edce6 ZJS |
859 | flags |= PAM_SILENT; |
860 | ||
f546241b ZJS |
861 | pam_code = pam_start(name, user, &conv, &handle); |
862 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
863 | handle = NULL; |
864 | goto fail; | |
865 | } | |
866 | ||
f546241b ZJS |
867 | if (tty) { |
868 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
869 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 870 | goto fail; |
f546241b | 871 | } |
5b6319dc | 872 | |
2065ca69 JW |
873 | STRV_FOREACH(e, *env) { |
874 | pam_code = pam_putenv(handle, *e); | |
875 | if (pam_code != PAM_SUCCESS) | |
876 | goto fail; | |
877 | } | |
878 | ||
970edce6 | 879 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 880 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
881 | goto fail; |
882 | ||
970edce6 | 883 | pam_code = pam_open_session(handle, flags); |
f546241b | 884 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
885 | goto fail; |
886 | ||
887 | close_session = true; | |
888 | ||
f546241b ZJS |
889 | e = pam_getenvlist(handle); |
890 | if (!e) { | |
5b6319dc LP |
891 | pam_code = PAM_BUF_ERR; |
892 | goto fail; | |
893 | } | |
894 | ||
895 | /* Block SIGTERM, so that we know that it won't get lost in | |
896 | * the child */ | |
ce30c8dc | 897 | |
72c0a2c2 | 898 | assert_se(sigprocmask_many(SIG_BLOCK, &old_ss, SIGTERM, -1) >= 0); |
5b6319dc LP |
899 | |
900 | parent_pid = getpid(); | |
901 | ||
f546241b | 902 | pam_pid = fork(); |
7bb70b6e LP |
903 | if (pam_pid < 0) { |
904 | r = -errno; | |
5b6319dc | 905 | goto fail; |
7bb70b6e | 906 | } |
5b6319dc LP |
907 | |
908 | if (pam_pid == 0) { | |
7bb70b6e | 909 | int sig, ret = EXIT_PAM; |
5b6319dc LP |
910 | |
911 | /* The child's job is to reset the PAM session on | |
912 | * termination */ | |
2d7c6aa2 | 913 | barrier_set_role(&barrier, BARRIER_CHILD); |
5b6319dc LP |
914 | |
915 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
916 | * of "/sbin/init"), to look pretty in /bin/ps */ |
917 | rename_process("(sd-pam)"); | |
5b6319dc LP |
918 | |
919 | /* Make sure we don't keep open the passed fds in this | |
920 | child. We assume that otherwise only those fds are | |
921 | open here that have been opened by PAM. */ | |
922 | close_many(fds, n_fds); | |
923 | ||
940c5210 AK |
924 | /* Drop privileges - we don't need any to pam_close_session |
925 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
926 | * If this fails, ignore the error - but expect sd-pam threads | |
927 | * to fail to exit normally */ | |
928 | if (setresuid(uid, uid, uid) < 0) | |
da927ba9 | 929 | log_error_errno(r, "Error: Failed to setresuid() in sd-pam: %m"); |
940c5210 | 930 | |
ce30c8dc LP |
931 | (void) ignore_signals(SIGPIPE, -1); |
932 | ||
940c5210 AK |
933 | /* Wait until our parent died. This will only work if |
934 | * the above setresuid() succeeds, otherwise the kernel | |
935 | * will not allow unprivileged parents kill their privileged | |
936 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
937 | * to do the rest for us. */ |
938 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
939 | goto child_finish; | |
940 | ||
2d7c6aa2 DH |
941 | /* Tell the parent that our setup is done. This is especially |
942 | * important regarding dropping privileges. Otherwise, unit | |
943 | * setup might race against our setresuid(2) call. */ | |
944 | barrier_place(&barrier); | |
945 | ||
5b6319dc LP |
946 | /* Check if our parent process might already have |
947 | * died? */ | |
948 | if (getppid() == parent_pid) { | |
d6e5f3ad DM |
949 | sigset_t ss; |
950 | ||
951 | assert_se(sigemptyset(&ss) >= 0); | |
952 | assert_se(sigaddset(&ss, SIGTERM) >= 0); | |
953 | ||
3dead8d9 LP |
954 | for (;;) { |
955 | if (sigwait(&ss, &sig) < 0) { | |
956 | if (errno == EINTR) | |
957 | continue; | |
958 | ||
959 | goto child_finish; | |
960 | } | |
5b6319dc | 961 | |
3dead8d9 LP |
962 | assert(sig == SIGTERM); |
963 | break; | |
964 | } | |
5b6319dc LP |
965 | } |
966 | ||
3dead8d9 | 967 | /* If our parent died we'll end the session */ |
f546241b | 968 | if (getppid() != parent_pid) { |
970edce6 | 969 | pam_code = pam_close_session(handle, flags); |
f546241b | 970 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 971 | goto child_finish; |
f546241b | 972 | } |
5b6319dc | 973 | |
7bb70b6e | 974 | ret = 0; |
5b6319dc LP |
975 | |
976 | child_finish: | |
970edce6 | 977 | pam_end(handle, pam_code | flags); |
7bb70b6e | 978 | _exit(ret); |
5b6319dc LP |
979 | } |
980 | ||
2d7c6aa2 DH |
981 | barrier_set_role(&barrier, BARRIER_PARENT); |
982 | ||
5b6319dc LP |
983 | /* If the child was forked off successfully it will do all the |
984 | * cleanups, so forget about the handle here. */ | |
985 | handle = NULL; | |
986 | ||
3b8bddde | 987 | /* Unblock SIGTERM again in the parent */ |
72c0a2c2 | 988 | assert_se(sigprocmask(SIG_SETMASK, &old_ss, NULL) >= 0); |
5b6319dc LP |
989 | |
990 | /* We close the log explicitly here, since the PAM modules | |
991 | * might have opened it, but we don't want this fd around. */ | |
992 | closelog(); | |
993 | ||
2d7c6aa2 DH |
994 | /* Synchronously wait for the child to initialize. We don't care for |
995 | * errors as we cannot recover. However, warn loudly if it happens. */ | |
996 | if (!barrier_place_and_sync(&barrier)) | |
997 | log_error("PAM initialization failed"); | |
998 | ||
2065ca69 JW |
999 | strv_free(*env); |
1000 | *env = e; | |
aa87e624 | 1001 | |
5b6319dc LP |
1002 | return 0; |
1003 | ||
1004 | fail: | |
970edce6 ZJS |
1005 | if (pam_code != PAM_SUCCESS) { |
1006 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
7bb70b6e LP |
1007 | r = -EPERM; /* PAM errors do not map to errno */ |
1008 | } else | |
1009 | log_error_errno(r, "PAM failed: %m"); | |
9ba35398 | 1010 | |
5b6319dc LP |
1011 | if (handle) { |
1012 | if (close_session) | |
970edce6 | 1013 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 1014 | |
970edce6 | 1015 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
1016 | } |
1017 | ||
1018 | strv_free(e); | |
5b6319dc LP |
1019 | closelog(); |
1020 | ||
7bb70b6e | 1021 | return r; |
5b6319dc LP |
1022 | } |
1023 | #endif | |
1024 | ||
5d6b1584 LP |
1025 | static void rename_process_from_path(const char *path) { |
1026 | char process_name[11]; | |
1027 | const char *p; | |
1028 | size_t l; | |
1029 | ||
1030 | /* This resulting string must fit in 10 chars (i.e. the length | |
1031 | * of "/sbin/init") to look pretty in /bin/ps */ | |
1032 | ||
2b6bf07d | 1033 | p = basename(path); |
5d6b1584 LP |
1034 | if (isempty(p)) { |
1035 | rename_process("(...)"); | |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | l = strlen(p); | |
1040 | if (l > 8) { | |
1041 | /* The end of the process name is usually more | |
1042 | * interesting, since the first bit might just be | |
1043 | * "systemd-" */ | |
1044 | p = p + l - 8; | |
1045 | l = 8; | |
1046 | } | |
1047 | ||
1048 | process_name[0] = '('; | |
1049 | memcpy(process_name+1, p, l); | |
1050 | process_name[1+l] = ')'; | |
1051 | process_name[1+l+1] = 0; | |
1052 | ||
1053 | rename_process(process_name); | |
1054 | } | |
1055 | ||
c0467cf3 | 1056 | #ifdef HAVE_SECCOMP |
17df7223 | 1057 | |
822a5960 | 1058 | static int apply_seccomp(const ExecContext *c) { |
17df7223 LP |
1059 | uint32_t negative_action, action; |
1060 | scmp_filter_ctx *seccomp; | |
c0467cf3 RC |
1061 | Iterator i; |
1062 | void *id; | |
17df7223 | 1063 | int r; |
8351ceae | 1064 | |
c0467cf3 | 1065 | assert(c); |
8351ceae | 1066 | |
17df7223 LP |
1067 | negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); |
1068 | ||
1069 | seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); | |
1070 | if (!seccomp) | |
1071 | return -ENOMEM; | |
8351ceae | 1072 | |
e9642be2 LP |
1073 | if (c->syscall_archs) { |
1074 | ||
1075 | SET_FOREACH(id, c->syscall_archs, i) { | |
1076 | r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); | |
1077 | if (r == -EEXIST) | |
1078 | continue; | |
7c66bae2 LP |
1079 | if (r < 0) |
1080 | goto finish; | |
e9642be2 | 1081 | } |
e9642be2 | 1082 | |
7c66bae2 | 1083 | } else { |
e9642be2 | 1084 | r = seccomp_add_secondary_archs(seccomp); |
7c66bae2 LP |
1085 | if (r < 0) |
1086 | goto finish; | |
57183d11 | 1087 | } |
8351ceae | 1088 | |
57183d11 | 1089 | action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action; |
17df7223 LP |
1090 | SET_FOREACH(id, c->syscall_filter, i) { |
1091 | r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0); | |
7c66bae2 LP |
1092 | if (r < 0) |
1093 | goto finish; | |
c0467cf3 | 1094 | } |
8351ceae | 1095 | |
7c66bae2 LP |
1096 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); |
1097 | if (r < 0) | |
1098 | goto finish; | |
1099 | ||
17df7223 | 1100 | r = seccomp_load(seccomp); |
7c66bae2 LP |
1101 | |
1102 | finish: | |
17df7223 | 1103 | seccomp_release(seccomp); |
4298d0b5 LP |
1104 | return r; |
1105 | } | |
1106 | ||
822a5960 | 1107 | static int apply_address_families(const ExecContext *c) { |
4298d0b5 LP |
1108 | scmp_filter_ctx *seccomp; |
1109 | Iterator i; | |
1110 | int r; | |
1111 | ||
1112 | assert(c); | |
1113 | ||
1114 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1115 | if (!seccomp) | |
1116 | return -ENOMEM; | |
1117 | ||
1118 | r = seccomp_add_secondary_archs(seccomp); | |
1119 | if (r < 0) | |
1120 | goto finish; | |
1121 | ||
1122 | if (c->address_families_whitelist) { | |
1123 | int af, first = 0, last = 0; | |
1124 | void *afp; | |
1125 | ||
1126 | /* If this is a whitelist, we first block the address | |
1127 | * families that are out of range and then everything | |
1128 | * that is not in the set. First, we find the lowest | |
1129 | * and highest address family in the set. */ | |
1130 | ||
1131 | SET_FOREACH(afp, c->address_families, i) { | |
1132 | af = PTR_TO_INT(afp); | |
17df7223 | 1133 | |
4298d0b5 LP |
1134 | if (af <= 0 || af >= af_max()) |
1135 | continue; | |
1136 | ||
1137 | if (first == 0 || af < first) | |
1138 | first = af; | |
1139 | ||
1140 | if (last == 0 || af > last) | |
1141 | last = af; | |
1142 | } | |
1143 | ||
1144 | assert((first == 0) == (last == 0)); | |
1145 | ||
1146 | if (first == 0) { | |
1147 | ||
1148 | /* No entries in the valid range, block everything */ | |
1149 | r = seccomp_rule_add( | |
1150 | seccomp, | |
1151 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1152 | SCMP_SYS(socket), | |
1153 | 0); | |
1154 | if (r < 0) | |
1155 | goto finish; | |
1156 | ||
1157 | } else { | |
1158 | ||
1159 | /* Block everything below the first entry */ | |
1160 | r = seccomp_rule_add( | |
1161 | seccomp, | |
1162 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1163 | SCMP_SYS(socket), | |
1164 | 1, | |
1165 | SCMP_A0(SCMP_CMP_LT, first)); | |
1166 | if (r < 0) | |
1167 | goto finish; | |
1168 | ||
1169 | /* Block everything above the last entry */ | |
1170 | r = seccomp_rule_add( | |
1171 | seccomp, | |
1172 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1173 | SCMP_SYS(socket), | |
1174 | 1, | |
1175 | SCMP_A0(SCMP_CMP_GT, last)); | |
1176 | if (r < 0) | |
1177 | goto finish; | |
1178 | ||
1179 | /* Block everything between the first and last | |
1180 | * entry */ | |
1181 | for (af = 1; af < af_max(); af++) { | |
1182 | ||
1183 | if (set_contains(c->address_families, INT_TO_PTR(af))) | |
1184 | continue; | |
1185 | ||
1186 | r = seccomp_rule_add( | |
1187 | seccomp, | |
1188 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1189 | SCMP_SYS(socket), | |
1190 | 1, | |
1191 | SCMP_A0(SCMP_CMP_EQ, af)); | |
1192 | if (r < 0) | |
1193 | goto finish; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | } else { | |
1198 | void *af; | |
1199 | ||
1200 | /* If this is a blacklist, then generate one rule for | |
1201 | * each address family that are then combined in OR | |
1202 | * checks. */ | |
1203 | ||
1204 | SET_FOREACH(af, c->address_families, i) { | |
1205 | ||
1206 | r = seccomp_rule_add( | |
1207 | seccomp, | |
1208 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1209 | SCMP_SYS(socket), | |
1210 | 1, | |
1211 | SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af))); | |
1212 | if (r < 0) | |
1213 | goto finish; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1218 | if (r < 0) | |
1219 | goto finish; | |
1220 | ||
1221 | r = seccomp_load(seccomp); | |
1222 | ||
1223 | finish: | |
1224 | seccomp_release(seccomp); | |
17df7223 | 1225 | return r; |
8351ceae | 1226 | } |
4298d0b5 | 1227 | |
f3e43635 TM |
1228 | static int apply_memory_deny_write_execute(const ExecContext *c) { |
1229 | scmp_filter_ctx *seccomp; | |
1230 | int r; | |
1231 | ||
1232 | assert(c); | |
1233 | ||
1234 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1235 | if (!seccomp) | |
1236 | return -ENOMEM; | |
1237 | ||
1238 | r = seccomp_rule_add( | |
1239 | seccomp, | |
abd84d4d | 1240 | SCMP_ACT_ERRNO(EPERM), |
f3e43635 TM |
1241 | SCMP_SYS(mmap), |
1242 | 1, | |
1243 | SCMP_A2(SCMP_CMP_MASKED_EQ, PROT_EXEC|PROT_WRITE, PROT_EXEC|PROT_WRITE)); | |
1244 | if (r < 0) | |
1245 | goto finish; | |
1246 | ||
1247 | r = seccomp_rule_add( | |
1248 | seccomp, | |
abd84d4d | 1249 | SCMP_ACT_ERRNO(EPERM), |
f3e43635 TM |
1250 | SCMP_SYS(mprotect), |
1251 | 1, | |
1252 | SCMP_A2(SCMP_CMP_MASKED_EQ, PROT_EXEC, PROT_EXEC)); | |
1253 | if (r < 0) | |
1254 | goto finish; | |
1255 | ||
1256 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1257 | if (r < 0) | |
1258 | goto finish; | |
1259 | ||
1260 | r = seccomp_load(seccomp); | |
1261 | ||
1262 | finish: | |
1263 | seccomp_release(seccomp); | |
1264 | return r; | |
1265 | } | |
1266 | ||
f4170c67 LP |
1267 | static int apply_restrict_realtime(const ExecContext *c) { |
1268 | static const int permitted_policies[] = { | |
1269 | SCHED_OTHER, | |
1270 | SCHED_BATCH, | |
1271 | SCHED_IDLE, | |
1272 | }; | |
1273 | ||
1274 | scmp_filter_ctx *seccomp; | |
1275 | unsigned i; | |
1276 | int r, p, max_policy = 0; | |
1277 | ||
1278 | assert(c); | |
1279 | ||
1280 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1281 | if (!seccomp) | |
1282 | return -ENOMEM; | |
1283 | ||
1284 | /* Determine the highest policy constant we want to allow */ | |
1285 | for (i = 0; i < ELEMENTSOF(permitted_policies); i++) | |
1286 | if (permitted_policies[i] > max_policy) | |
1287 | max_policy = permitted_policies[i]; | |
1288 | ||
1289 | /* Go through all policies with lower values than that, and block them -- unless they appear in the | |
1290 | * whitelist. */ | |
1291 | for (p = 0; p < max_policy; p++) { | |
1292 | bool good = false; | |
1293 | ||
1294 | /* Check if this is in the whitelist. */ | |
1295 | for (i = 0; i < ELEMENTSOF(permitted_policies); i++) | |
1296 | if (permitted_policies[i] == p) { | |
1297 | good = true; | |
1298 | break; | |
1299 | } | |
1300 | ||
1301 | if (good) | |
1302 | continue; | |
1303 | ||
1304 | /* Deny this policy */ | |
1305 | r = seccomp_rule_add( | |
1306 | seccomp, | |
1307 | SCMP_ACT_ERRNO(EPERM), | |
1308 | SCMP_SYS(sched_setscheduler), | |
1309 | 1, | |
1310 | SCMP_A1(SCMP_CMP_EQ, p)); | |
1311 | if (r < 0) | |
1312 | goto finish; | |
1313 | } | |
1314 | ||
1315 | /* Blacklist all other policies, i.e. the ones with higher values. Note that all comparisons are unsigned here, | |
1316 | * hence no need no check for < 0 values. */ | |
1317 | r = seccomp_rule_add( | |
1318 | seccomp, | |
1319 | SCMP_ACT_ERRNO(EPERM), | |
1320 | SCMP_SYS(sched_setscheduler), | |
1321 | 1, | |
1322 | SCMP_A1(SCMP_CMP_GT, max_policy)); | |
1323 | if (r < 0) | |
1324 | goto finish; | |
1325 | ||
1326 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1327 | if (r < 0) | |
1328 | goto finish; | |
1329 | ||
1330 | r = seccomp_load(seccomp); | |
1331 | ||
1332 | finish: | |
1333 | seccomp_release(seccomp); | |
1334 | return r; | |
1335 | } | |
1336 | ||
c0467cf3 | 1337 | #endif |
8351ceae | 1338 | |
31a7eb86 ZJS |
1339 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
1340 | assert(idle_pipe); | |
1341 | ||
03e334a1 | 1342 | |
54eb2300 LP |
1343 | idle_pipe[1] = safe_close(idle_pipe[1]); |
1344 | idle_pipe[2] = safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1345 | |
1346 | if (idle_pipe[0] >= 0) { | |
1347 | int r; | |
1348 | ||
1349 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1350 | ||
1351 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
c7cc737f LP |
1352 | ssize_t n; |
1353 | ||
31a7eb86 | 1354 | /* Signal systemd that we are bored and want to continue. */ |
c7cc737f LP |
1355 | n = write(idle_pipe[3], "x", 1); |
1356 | if (n > 0) | |
cd972d69 ZJS |
1357 | /* Wait for systemd to react to the signal above. */ |
1358 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
31a7eb86 ZJS |
1359 | } |
1360 | ||
54eb2300 | 1361 | idle_pipe[0] = safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1362 | |
1363 | } | |
1364 | ||
54eb2300 | 1365 | idle_pipe[3] = safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1366 | } |
1367 | ||
7cae38c4 | 1368 | static int build_environment( |
9fa95f85 | 1369 | const ExecContext *c, |
1e22b5cd | 1370 | const ExecParameters *p, |
7cae38c4 LP |
1371 | unsigned n_fds, |
1372 | const char *home, | |
1373 | const char *username, | |
1374 | const char *shell, | |
7bce046b LP |
1375 | dev_t journal_stream_dev, |
1376 | ino_t journal_stream_ino, | |
7cae38c4 LP |
1377 | char ***ret) { |
1378 | ||
1379 | _cleanup_strv_free_ char **our_env = NULL; | |
1380 | unsigned n_env = 0; | |
1381 | char *x; | |
1382 | ||
1383 | assert(c); | |
1384 | assert(ret); | |
1385 | ||
7bce046b | 1386 | our_env = new0(char*, 12); |
7cae38c4 LP |
1387 | if (!our_env) |
1388 | return -ENOMEM; | |
1389 | ||
1390 | if (n_fds > 0) { | |
8dd4c05b LP |
1391 | _cleanup_free_ char *joined = NULL; |
1392 | ||
ccd06097 | 1393 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0) |
7cae38c4 LP |
1394 | return -ENOMEM; |
1395 | our_env[n_env++] = x; | |
1396 | ||
1397 | if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0) | |
1398 | return -ENOMEM; | |
1399 | our_env[n_env++] = x; | |
8dd4c05b | 1400 | |
1e22b5cd | 1401 | joined = strv_join(p->fd_names, ":"); |
8dd4c05b LP |
1402 | if (!joined) |
1403 | return -ENOMEM; | |
1404 | ||
1405 | x = strjoin("LISTEN_FDNAMES=", joined, NULL); | |
1406 | if (!x) | |
1407 | return -ENOMEM; | |
1408 | our_env[n_env++] = x; | |
7cae38c4 LP |
1409 | } |
1410 | ||
1e22b5cd | 1411 | if (p->watchdog_usec > 0) { |
ccd06097 | 1412 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0) |
09812eb7 LP |
1413 | return -ENOMEM; |
1414 | our_env[n_env++] = x; | |
1415 | ||
1e22b5cd | 1416 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, p->watchdog_usec) < 0) |
09812eb7 LP |
1417 | return -ENOMEM; |
1418 | our_env[n_env++] = x; | |
1419 | } | |
1420 | ||
7cae38c4 LP |
1421 | if (home) { |
1422 | x = strappend("HOME=", home); | |
1423 | if (!x) | |
1424 | return -ENOMEM; | |
1425 | our_env[n_env++] = x; | |
1426 | } | |
1427 | ||
1428 | if (username) { | |
1429 | x = strappend("LOGNAME=", username); | |
1430 | if (!x) | |
1431 | return -ENOMEM; | |
1432 | our_env[n_env++] = x; | |
1433 | ||
1434 | x = strappend("USER=", username); | |
1435 | if (!x) | |
1436 | return -ENOMEM; | |
1437 | our_env[n_env++] = x; | |
1438 | } | |
1439 | ||
1440 | if (shell) { | |
1441 | x = strappend("SHELL=", shell); | |
1442 | if (!x) | |
1443 | return -ENOMEM; | |
1444 | our_env[n_env++] = x; | |
1445 | } | |
1446 | ||
1447 | if (is_terminal_input(c->std_input) || | |
1448 | c->std_output == EXEC_OUTPUT_TTY || | |
1449 | c->std_error == EXEC_OUTPUT_TTY || | |
1450 | c->tty_path) { | |
1451 | ||
1e22b5cd | 1452 | x = strdup(default_term_for_tty(exec_context_tty_path(c))); |
7cae38c4 LP |
1453 | if (!x) |
1454 | return -ENOMEM; | |
1455 | our_env[n_env++] = x; | |
1456 | } | |
1457 | ||
7bce046b LP |
1458 | if (journal_stream_dev != 0 && journal_stream_ino != 0) { |
1459 | if (asprintf(&x, "JOURNAL_STREAM=" DEV_FMT ":" INO_FMT, journal_stream_dev, journal_stream_ino) < 0) | |
1460 | return -ENOMEM; | |
1461 | ||
1462 | our_env[n_env++] = x; | |
1463 | } | |
1464 | ||
7cae38c4 | 1465 | our_env[n_env++] = NULL; |
7bce046b | 1466 | assert(n_env <= 12); |
7cae38c4 LP |
1467 | |
1468 | *ret = our_env; | |
1469 | our_env = NULL; | |
1470 | ||
1471 | return 0; | |
1472 | } | |
1473 | ||
b4c14404 FB |
1474 | static int build_pass_environment(const ExecContext *c, char ***ret) { |
1475 | _cleanup_strv_free_ char **pass_env = NULL; | |
1476 | size_t n_env = 0, n_bufsize = 0; | |
1477 | char **i; | |
1478 | ||
1479 | STRV_FOREACH(i, c->pass_environment) { | |
1480 | _cleanup_free_ char *x = NULL; | |
1481 | char *v; | |
1482 | ||
1483 | v = getenv(*i); | |
1484 | if (!v) | |
1485 | continue; | |
1486 | x = strjoin(*i, "=", v, NULL); | |
1487 | if (!x) | |
1488 | return -ENOMEM; | |
1489 | if (!GREEDY_REALLOC(pass_env, n_bufsize, n_env + 2)) | |
1490 | return -ENOMEM; | |
1491 | pass_env[n_env++] = x; | |
1492 | pass_env[n_env] = NULL; | |
1493 | x = NULL; | |
1494 | } | |
1495 | ||
1496 | *ret = pass_env; | |
1497 | pass_env = NULL; | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
8b44a3d2 LP |
1502 | static bool exec_needs_mount_namespace( |
1503 | const ExecContext *context, | |
1504 | const ExecParameters *params, | |
1505 | ExecRuntime *runtime) { | |
1506 | ||
1507 | assert(context); | |
1508 | assert(params); | |
1509 | ||
1510 | if (!strv_isempty(context->read_write_dirs) || | |
1511 | !strv_isempty(context->read_only_dirs) || | |
1512 | !strv_isempty(context->inaccessible_dirs)) | |
1513 | return true; | |
1514 | ||
1515 | if (context->mount_flags != 0) | |
1516 | return true; | |
1517 | ||
1518 | if (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) | |
1519 | return true; | |
1520 | ||
8b44a3d2 LP |
1521 | if (context->private_devices || |
1522 | context->protect_system != PROTECT_SYSTEM_NO || | |
1523 | context->protect_home != PROTECT_HOME_NO) | |
1524 | return true; | |
1525 | ||
1526 | return false; | |
1527 | } | |
1528 | ||
a34ceba6 LP |
1529 | static int close_remaining_fds( |
1530 | const ExecParameters *params, | |
1531 | ExecRuntime *runtime, | |
1532 | int socket_fd, | |
1533 | int *fds, unsigned n_fds) { | |
1534 | ||
1535 | unsigned n_dont_close = 0; | |
1536 | int dont_close[n_fds + 7]; | |
1537 | ||
1538 | assert(params); | |
1539 | ||
1540 | if (params->stdin_fd >= 0) | |
1541 | dont_close[n_dont_close++] = params->stdin_fd; | |
1542 | if (params->stdout_fd >= 0) | |
1543 | dont_close[n_dont_close++] = params->stdout_fd; | |
1544 | if (params->stderr_fd >= 0) | |
1545 | dont_close[n_dont_close++] = params->stderr_fd; | |
1546 | ||
1547 | if (socket_fd >= 0) | |
1548 | dont_close[n_dont_close++] = socket_fd; | |
1549 | if (n_fds > 0) { | |
1550 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
1551 | n_dont_close += n_fds; | |
1552 | } | |
1553 | ||
a34ceba6 LP |
1554 | if (runtime) { |
1555 | if (runtime->netns_storage_socket[0] >= 0) | |
1556 | dont_close[n_dont_close++] = runtime->netns_storage_socket[0]; | |
1557 | if (runtime->netns_storage_socket[1] >= 0) | |
1558 | dont_close[n_dont_close++] = runtime->netns_storage_socket[1]; | |
1559 | } | |
1560 | ||
1561 | return close_all_fds(dont_close, n_dont_close); | |
1562 | } | |
1563 | ||
ff0af2a1 | 1564 | static int exec_child( |
f2341e0a | 1565 | Unit *unit, |
ff0af2a1 LP |
1566 | ExecCommand *command, |
1567 | const ExecContext *context, | |
1568 | const ExecParameters *params, | |
1569 | ExecRuntime *runtime, | |
1570 | char **argv, | |
1571 | int socket_fd, | |
1572 | int *fds, unsigned n_fds, | |
1573 | char **files_env, | |
1574 | int *exit_status) { | |
d35fbf6b | 1575 | |
2065ca69 | 1576 | _cleanup_strv_free_ char **our_env = NULL, **pass_env = NULL, **accum_env = NULL, **final_argv = NULL; |
9008e1ac | 1577 | _cleanup_free_ char *mac_selinux_context_net = NULL; |
5f5d8eab | 1578 | const char *username = NULL, *home = NULL, *shell = NULL, *wd; |
7bce046b LP |
1579 | dev_t journal_stream_dev = 0; |
1580 | ino_t journal_stream_ino = 0; | |
1581 | bool needs_mount_namespace; | |
fed1e721 LP |
1582 | uid_t uid = UID_INVALID; |
1583 | gid_t gid = GID_INVALID; | |
ff0af2a1 | 1584 | int i, r; |
034c6ed7 | 1585 | |
f2341e0a | 1586 | assert(unit); |
5cb5a6ff LP |
1587 | assert(command); |
1588 | assert(context); | |
d35fbf6b | 1589 | assert(params); |
ff0af2a1 | 1590 | assert(exit_status); |
d35fbf6b DM |
1591 | |
1592 | rename_process_from_path(command->path); | |
1593 | ||
1594 | /* We reset exactly these signals, since they are the | |
1595 | * only ones we set to SIG_IGN in the main daemon. All | |
1596 | * others we leave untouched because we set them to | |
1597 | * SIG_DFL or a valid handler initially, both of which | |
1598 | * will be demoted to SIG_DFL. */ | |
ce30c8dc LP |
1599 | (void) default_signals(SIGNALS_CRASH_HANDLER, |
1600 | SIGNALS_IGNORE, -1); | |
d35fbf6b DM |
1601 | |
1602 | if (context->ignore_sigpipe) | |
ce30c8dc | 1603 | (void) ignore_signals(SIGPIPE, -1); |
d35fbf6b | 1604 | |
ff0af2a1 LP |
1605 | r = reset_signal_mask(); |
1606 | if (r < 0) { | |
1607 | *exit_status = EXIT_SIGNAL_MASK; | |
1608 | return r; | |
d35fbf6b | 1609 | } |
034c6ed7 | 1610 | |
d35fbf6b DM |
1611 | if (params->idle_pipe) |
1612 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 1613 | |
d35fbf6b DM |
1614 | /* Close sockets very early to make sure we don't |
1615 | * block init reexecution because it cannot bind its | |
1616 | * sockets */ | |
ff0af2a1 | 1617 | |
d35fbf6b | 1618 | log_forget_fds(); |
4f2d528d | 1619 | |
a34ceba6 | 1620 | r = close_remaining_fds(params, runtime, socket_fd, fds, n_fds); |
ff0af2a1 LP |
1621 | if (r < 0) { |
1622 | *exit_status = EXIT_FDS; | |
1623 | return r; | |
8c7be95e LP |
1624 | } |
1625 | ||
d35fbf6b DM |
1626 | if (!context->same_pgrp) |
1627 | if (setsid() < 0) { | |
ff0af2a1 | 1628 | *exit_status = EXIT_SETSID; |
d35fbf6b DM |
1629 | return -errno; |
1630 | } | |
9e2f7c11 | 1631 | |
1e22b5cd | 1632 | exec_context_tty_reset(context, params); |
d35fbf6b DM |
1633 | |
1634 | if (params->confirm_spawn) { | |
1635 | char response; | |
1636 | ||
ff0af2a1 LP |
1637 | r = ask_for_confirmation(&response, argv); |
1638 | if (r == -ETIMEDOUT) | |
d35fbf6b | 1639 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); |
ff0af2a1 LP |
1640 | else if (r < 0) |
1641 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-r)); | |
d35fbf6b DM |
1642 | else if (response == 's') { |
1643 | write_confirm_message("Skipping execution.\n"); | |
ff0af2a1 | 1644 | *exit_status = EXIT_CONFIRM; |
d35fbf6b DM |
1645 | return -ECANCELED; |
1646 | } else if (response == 'n') { | |
1647 | write_confirm_message("Failing execution.\n"); | |
ff0af2a1 | 1648 | *exit_status = 0; |
d35fbf6b DM |
1649 | return 0; |
1650 | } | |
1651 | } | |
1a63a750 | 1652 | |
524daa8c ZJS |
1653 | if (context->user) { |
1654 | username = context->user; | |
ff0af2a1 LP |
1655 | r = get_user_creds(&username, &uid, &gid, &home, &shell); |
1656 | if (r < 0) { | |
1657 | *exit_status = EXIT_USER; | |
1658 | return r; | |
524daa8c ZJS |
1659 | } |
1660 | } | |
1661 | ||
5bc7452b RC |
1662 | if (context->group) { |
1663 | const char *g = context->group; | |
1664 | ||
1665 | r = get_group_creds(&g, &gid); | |
1666 | if (r < 0) { | |
1667 | *exit_status = EXIT_GROUP; | |
1668 | return r; | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | ||
d35fbf6b DM |
1673 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1674 | * must sure to drop O_NONBLOCK */ | |
1675 | if (socket_fd >= 0) | |
a34ceba6 | 1676 | (void) fd_nonblock(socket_fd, false); |
acbb0225 | 1677 | |
a34ceba6 | 1678 | r = setup_input(context, params, socket_fd); |
ff0af2a1 LP |
1679 | if (r < 0) { |
1680 | *exit_status = EXIT_STDIN; | |
1681 | return r; | |
d35fbf6b | 1682 | } |
034c6ed7 | 1683 | |
7bce046b | 1684 | r = setup_output(unit, context, params, STDOUT_FILENO, socket_fd, basename(command->path), uid, gid, &journal_stream_dev, &journal_stream_ino); |
ff0af2a1 LP |
1685 | if (r < 0) { |
1686 | *exit_status = EXIT_STDOUT; | |
1687 | return r; | |
d35fbf6b DM |
1688 | } |
1689 | ||
7bce046b | 1690 | r = setup_output(unit, context, params, STDERR_FILENO, socket_fd, basename(command->path), uid, gid, &journal_stream_dev, &journal_stream_ino); |
ff0af2a1 LP |
1691 | if (r < 0) { |
1692 | *exit_status = EXIT_STDERR; | |
1693 | return r; | |
d35fbf6b DM |
1694 | } |
1695 | ||
1696 | if (params->cgroup_path) { | |
ff0af2a1 LP |
1697 | r = cg_attach_everywhere(params->cgroup_supported, params->cgroup_path, 0, NULL, NULL); |
1698 | if (r < 0) { | |
1699 | *exit_status = EXIT_CGROUP; | |
1700 | return r; | |
309bff19 | 1701 | } |
d35fbf6b | 1702 | } |
309bff19 | 1703 | |
d35fbf6b | 1704 | if (context->oom_score_adjust_set) { |
d5243d62 | 1705 | char t[DECIMAL_STR_MAX(context->oom_score_adjust)]; |
f2b68789 | 1706 | |
d5243d62 LP |
1707 | /* When we can't make this change due to EPERM, then |
1708 | * let's silently skip over it. User namespaces | |
1709 | * prohibit write access to this file, and we | |
1710 | * shouldn't trip up over that. */ | |
613b411c | 1711 | |
d5243d62 | 1712 | sprintf(t, "%i", context->oom_score_adjust); |
ad118bda | 1713 | r = write_string_file("/proc/self/oom_score_adj", t, 0); |
6cb7fa17 | 1714 | if (r == -EPERM || r == -EACCES) { |
ff0af2a1 | 1715 | log_open(); |
f2341e0a | 1716 | log_unit_debug_errno(unit, r, "Failed to adjust OOM setting, assuming containerized execution, ignoring: %m"); |
ff0af2a1 LP |
1717 | log_close(); |
1718 | } else if (r < 0) { | |
1719 | *exit_status = EXIT_OOM_ADJUST; | |
d35fbf6b | 1720 | return -errno; |
613b411c | 1721 | } |
d35fbf6b DM |
1722 | } |
1723 | ||
1724 | if (context->nice_set) | |
1725 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
ff0af2a1 | 1726 | *exit_status = EXIT_NICE; |
d35fbf6b | 1727 | return -errno; |
613b411c LP |
1728 | } |
1729 | ||
d35fbf6b DM |
1730 | if (context->cpu_sched_set) { |
1731 | struct sched_param param = { | |
1732 | .sched_priority = context->cpu_sched_priority, | |
1733 | }; | |
1734 | ||
ff0af2a1 LP |
1735 | r = sched_setscheduler(0, |
1736 | context->cpu_sched_policy | | |
1737 | (context->cpu_sched_reset_on_fork ? | |
1738 | SCHED_RESET_ON_FORK : 0), | |
1739 | ¶m); | |
1740 | if (r < 0) { | |
1741 | *exit_status = EXIT_SETSCHEDULER; | |
d35fbf6b | 1742 | return -errno; |
fc9b2a84 | 1743 | } |
d35fbf6b | 1744 | } |
fc9b2a84 | 1745 | |
d35fbf6b DM |
1746 | if (context->cpuset) |
1747 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
ff0af2a1 | 1748 | *exit_status = EXIT_CPUAFFINITY; |
d35fbf6b | 1749 | return -errno; |
034c6ed7 LP |
1750 | } |
1751 | ||
d35fbf6b DM |
1752 | if (context->ioprio_set) |
1753 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
ff0af2a1 | 1754 | *exit_status = EXIT_IOPRIO; |
d35fbf6b DM |
1755 | return -errno; |
1756 | } | |
da726a4d | 1757 | |
d35fbf6b DM |
1758 | if (context->timer_slack_nsec != NSEC_INFINITY) |
1759 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
ff0af2a1 | 1760 | *exit_status = EXIT_TIMERSLACK; |
d35fbf6b | 1761 | return -errno; |
4c2630eb | 1762 | } |
9eba9da4 | 1763 | |
050f7277 | 1764 | if (context->personality != PERSONALITY_INVALID) |
d35fbf6b | 1765 | if (personality(context->personality) < 0) { |
ff0af2a1 | 1766 | *exit_status = EXIT_PERSONALITY; |
d35fbf6b | 1767 | return -errno; |
4c2630eb | 1768 | } |
94f04347 | 1769 | |
d35fbf6b | 1770 | if (context->utmp_id) |
023a4f67 LP |
1771 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path, |
1772 | context->utmp_mode == EXEC_UTMP_INIT ? INIT_PROCESS : | |
1773 | context->utmp_mode == EXEC_UTMP_LOGIN ? LOGIN_PROCESS : | |
1774 | USER_PROCESS, | |
1775 | username ? "root" : context->user); | |
d35fbf6b | 1776 | |
524daa8c | 1777 | if (context->user && is_terminal_input(context->std_input)) { |
ff0af2a1 LP |
1778 | r = chown_terminal(STDIN_FILENO, uid); |
1779 | if (r < 0) { | |
1780 | *exit_status = EXIT_STDIN; | |
1781 | return r; | |
071830ff | 1782 | } |
d35fbf6b | 1783 | } |
8e274523 | 1784 | |
a931ad47 LP |
1785 | /* If delegation is enabled we'll pass ownership of the cgroup |
1786 | * (but only in systemd's own controller hierarchy!) to the | |
1787 | * user of the new process. */ | |
1788 | if (params->cgroup_path && context->user && params->cgroup_delegate) { | |
ff0af2a1 LP |
1789 | r = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid); |
1790 | if (r < 0) { | |
1791 | *exit_status = EXIT_CGROUP; | |
1792 | return r; | |
d35fbf6b | 1793 | } |
034c6ed7 | 1794 | |
034c6ed7 | 1795 | |
ff0af2a1 LP |
1796 | r = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0755, uid, gid); |
1797 | if (r < 0) { | |
1798 | *exit_status = EXIT_CGROUP; | |
1799 | return r; | |
034c6ed7 | 1800 | } |
d35fbf6b | 1801 | } |
034c6ed7 | 1802 | |
d35fbf6b DM |
1803 | if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) { |
1804 | char **rt; | |
fb33a393 | 1805 | |
d35fbf6b DM |
1806 | STRV_FOREACH(rt, context->runtime_directory) { |
1807 | _cleanup_free_ char *p; | |
94f04347 | 1808 | |
d35fbf6b DM |
1809 | p = strjoin(params->runtime_prefix, "/", *rt, NULL); |
1810 | if (!p) { | |
ff0af2a1 | 1811 | *exit_status = EXIT_RUNTIME_DIRECTORY; |
d35fbf6b | 1812 | return -ENOMEM; |
94f04347 | 1813 | } |
94f04347 | 1814 | |
6bfe5c28 LP |
1815 | r = mkdir_p_label(p, context->runtime_directory_mode); |
1816 | if (r < 0) { | |
1817 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1818 | return r; | |
1819 | } | |
1820 | ||
1821 | r = chmod_and_chown(p, context->runtime_directory_mode, uid, gid); | |
ff0af2a1 LP |
1822 | if (r < 0) { |
1823 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1824 | return r; | |
94f04347 | 1825 | } |
d35fbf6b DM |
1826 | } |
1827 | } | |
94f04347 | 1828 | |
7bce046b LP |
1829 | r = build_environment( |
1830 | context, | |
1831 | params, | |
1832 | n_fds, | |
1833 | home, | |
1834 | username, | |
1835 | shell, | |
1836 | journal_stream_dev, | |
1837 | journal_stream_ino, | |
1838 | &our_env); | |
2065ca69 JW |
1839 | if (r < 0) { |
1840 | *exit_status = EXIT_MEMORY; | |
1841 | return r; | |
1842 | } | |
1843 | ||
1844 | r = build_pass_environment(context, &pass_env); | |
1845 | if (r < 0) { | |
1846 | *exit_status = EXIT_MEMORY; | |
1847 | return r; | |
1848 | } | |
1849 | ||
1850 | accum_env = strv_env_merge(5, | |
1851 | params->environment, | |
1852 | our_env, | |
1853 | pass_env, | |
1854 | context->environment, | |
1855 | files_env, | |
1856 | NULL); | |
1857 | if (!accum_env) { | |
1858 | *exit_status = EXIT_MEMORY; | |
1859 | return -ENOMEM; | |
1860 | } | |
1861 | ||
b213e1c1 SW |
1862 | umask(context->umask); |
1863 | ||
cf677fe6 | 1864 | if (params->apply_permissions && !command->privileged) { |
ff0af2a1 LP |
1865 | r = enforce_groups(context, username, gid); |
1866 | if (r < 0) { | |
1867 | *exit_status = EXIT_GROUP; | |
1868 | return r; | |
d35fbf6b | 1869 | } |
6bf6e43e | 1870 | #ifdef HAVE_SMACK |
6bf6e43e SW |
1871 | if (context->smack_process_label) { |
1872 | r = mac_smack_apply_pid(0, context->smack_process_label); | |
1873 | if (r < 0) { | |
1874 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1875 | return r; | |
1876 | } | |
1877 | } | |
1878 | #ifdef SMACK_DEFAULT_PROCESS_LABEL | |
1879 | else { | |
1880 | _cleanup_free_ char *exec_label = NULL; | |
1881 | ||
1882 | r = mac_smack_read(command->path, SMACK_ATTR_EXEC, &exec_label); | |
1883 | if (r < 0 && r != -ENODATA && r != -EOPNOTSUPP) { | |
1884 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1885 | return r; | |
1886 | } | |
1887 | ||
1888 | r = mac_smack_apply_pid(0, exec_label ? : SMACK_DEFAULT_PROCESS_LABEL); | |
1889 | if (r < 0) { | |
1890 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1891 | return r; | |
1892 | } | |
1893 | } | |
6bf6e43e SW |
1894 | #endif |
1895 | #endif | |
d35fbf6b | 1896 | #ifdef HAVE_PAM |
b213e1c1 | 1897 | if (context->pam_name && username) { |
2065ca69 | 1898 | r = setup_pam(context->pam_name, username, uid, context->tty_path, &accum_env, fds, n_fds); |
b213e1c1 SW |
1899 | if (r < 0) { |
1900 | *exit_status = EXIT_PAM; | |
1901 | return r; | |
1902 | } | |
d35fbf6b | 1903 | } |
d35fbf6b | 1904 | #endif |
b213e1c1 | 1905 | } |
ac45f971 | 1906 | |
d35fbf6b | 1907 | if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) { |
ff0af2a1 LP |
1908 | r = setup_netns(runtime->netns_storage_socket); |
1909 | if (r < 0) { | |
1910 | *exit_status = EXIT_NETWORK; | |
1911 | return r; | |
d35fbf6b DM |
1912 | } |
1913 | } | |
169c1bda | 1914 | |
ee818b89 AC |
1915 | needs_mount_namespace = exec_needs_mount_namespace(context, params, runtime); |
1916 | ||
1917 | if (needs_mount_namespace) { | |
d35fbf6b DM |
1918 | char *tmp = NULL, *var = NULL; |
1919 | ||
1920 | /* The runtime struct only contains the parent | |
1921 | * of the private /tmp, which is | |
1922 | * non-accessible to world users. Inside of it | |
1923 | * there's a /tmp that is sticky, and that's | |
1924 | * the one we want to use here. */ | |
1925 | ||
1926 | if (context->private_tmp && runtime) { | |
1927 | if (runtime->tmp_dir) | |
63c372cb | 1928 | tmp = strjoina(runtime->tmp_dir, "/tmp"); |
d35fbf6b | 1929 | if (runtime->var_tmp_dir) |
63c372cb | 1930 | var = strjoina(runtime->var_tmp_dir, "/tmp"); |
d35fbf6b | 1931 | } |
d8b4e2e9 | 1932 | |
ff0af2a1 | 1933 | r = setup_namespace( |
ee818b89 | 1934 | params->apply_chroot ? context->root_directory : NULL, |
d35fbf6b DM |
1935 | context->read_write_dirs, |
1936 | context->read_only_dirs, | |
1937 | context->inaccessible_dirs, | |
1938 | tmp, | |
1939 | var, | |
1940 | context->private_devices, | |
1941 | context->protect_home, | |
1942 | context->protect_system, | |
1943 | context->mount_flags); | |
0015ebf3 | 1944 | |
ff0af2a1 LP |
1945 | /* If we couldn't set up the namespace this is |
1946 | * probably due to a missing capability. In this case, | |
1947 | * silently proceeed. */ | |
1948 | if (r == -EPERM || r == -EACCES) { | |
1949 | log_open(); | |
f2341e0a | 1950 | log_unit_debug_errno(unit, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m"); |
ff0af2a1 LP |
1951 | log_close(); |
1952 | } else if (r < 0) { | |
1953 | *exit_status = EXIT_NAMESPACE; | |
1954 | return r; | |
81a2b7ce | 1955 | } |
d35fbf6b | 1956 | } |
81a2b7ce | 1957 | |
5f5d8eab LP |
1958 | if (context->working_directory_home) |
1959 | wd = home; | |
1960 | else if (context->working_directory) | |
1961 | wd = context->working_directory; | |
1962 | else | |
1963 | wd = "/"; | |
1964 | ||
d35fbf6b | 1965 | if (params->apply_chroot) { |
ee818b89 | 1966 | if (!needs_mount_namespace && context->root_directory) |
d35fbf6b | 1967 | if (chroot(context->root_directory) < 0) { |
ff0af2a1 | 1968 | *exit_status = EXIT_CHROOT; |
d35fbf6b | 1969 | return -errno; |
8aa75193 LP |
1970 | } |
1971 | ||
5f5d8eab | 1972 | if (chdir(wd) < 0 && |
4c08c824 | 1973 | !context->working_directory_missing_ok) { |
ff0af2a1 | 1974 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1975 | return -errno; |
1976 | } | |
1977 | } else { | |
5f5d8eab | 1978 | const char *d; |
8aa75193 | 1979 | |
5f5d8eab | 1980 | d = strjoina(strempty(context->root_directory), "/", strempty(wd)); |
cf1d0302 LP |
1981 | if (chdir(d) < 0 && |
1982 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1983 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1984 | return -errno; |
1985 | } | |
1986 | } | |
e66cf1a3 | 1987 | |
9008e1ac | 1988 | #ifdef HAVE_SELINUX |
cf677fe6 | 1989 | if (params->apply_permissions && mac_selinux_use() && params->selinux_context_net && socket_fd >= 0 && !command->privileged) { |
ff0af2a1 LP |
1990 | r = mac_selinux_get_child_mls_label(socket_fd, command->path, context->selinux_context, &mac_selinux_context_net); |
1991 | if (r < 0) { | |
1992 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1993 | return r; | |
9008e1ac MS |
1994 | } |
1995 | } | |
1996 | #endif | |
1997 | ||
d35fbf6b DM |
1998 | /* We repeat the fd closing here, to make sure that |
1999 | * nothing is leaked from the PAM modules. Note that | |
2000 | * we are more aggressive this time since socket_fd | |
e44da745 DM |
2001 | * and the netns fds we don't need anymore. The custom |
2002 | * endpoint fd was needed to upload the policy and can | |
2003 | * now be closed as well. */ | |
ff0af2a1 LP |
2004 | r = close_all_fds(fds, n_fds); |
2005 | if (r >= 0) | |
2006 | r = shift_fds(fds, n_fds); | |
2007 | if (r >= 0) | |
2008 | r = flags_fds(fds, n_fds, context->non_blocking); | |
2009 | if (r < 0) { | |
2010 | *exit_status = EXIT_FDS; | |
2011 | return r; | |
d35fbf6b | 2012 | } |
e66cf1a3 | 2013 | |
cf677fe6 | 2014 | if (params->apply_permissions && !command->privileged) { |
e66cf1a3 | 2015 | |
19c0b0b9 RC |
2016 | bool use_address_families = context->address_families_whitelist || |
2017 | !set_isempty(context->address_families); | |
2018 | bool use_syscall_filter = context->syscall_whitelist || | |
2019 | !set_isempty(context->syscall_filter) || | |
2020 | !set_isempty(context->syscall_archs); | |
755d4b67 IP |
2021 | int secure_bits = context->secure_bits; |
2022 | ||
d35fbf6b | 2023 | for (i = 0; i < _RLIMIT_MAX; i++) { |
03857c43 | 2024 | |
d35fbf6b DM |
2025 | if (!context->rlimit[i]) |
2026 | continue; | |
2027 | ||
03857c43 LP |
2028 | r = setrlimit_closest(i, context->rlimit[i]); |
2029 | if (r < 0) { | |
ff0af2a1 | 2030 | *exit_status = EXIT_LIMITS; |
03857c43 | 2031 | return r; |
e66cf1a3 LP |
2032 | } |
2033 | } | |
2034 | ||
f4170c67 LP |
2035 | /* Set the RTPRIO resource limit to 0, but only if nothing else was explicitly requested. */ |
2036 | if (context->restrict_realtime && !context->rlimit[RLIMIT_RTPRIO]) { | |
2037 | if (setrlimit(RLIMIT_RTPRIO, &RLIMIT_MAKE_CONST(0)) < 0) { | |
2038 | *exit_status = EXIT_LIMITS; | |
2039 | return -errno; | |
2040 | } | |
2041 | } | |
2042 | ||
a103496c IP |
2043 | if (!cap_test_all(context->capability_bounding_set)) { |
2044 | r = capability_bounding_set_drop(context->capability_bounding_set, false); | |
ff0af2a1 LP |
2045 | if (r < 0) { |
2046 | *exit_status = EXIT_CAPABILITIES; | |
2047 | return r; | |
3b8bddde | 2048 | } |
4c2630eb | 2049 | } |
3b8bddde | 2050 | |
755d4b67 IP |
2051 | /* This is done before enforce_user, but ambient set |
2052 | * does not survive over setresuid() if keep_caps is not set. */ | |
2053 | if (context->capability_ambient_set != 0) { | |
2054 | r = capability_ambient_set_apply(context->capability_ambient_set, true); | |
2055 | if (r < 0) { | |
2056 | *exit_status = EXIT_CAPABILITIES; | |
2057 | return r; | |
2058 | } | |
755d4b67 IP |
2059 | } |
2060 | ||
d35fbf6b | 2061 | if (context->user) { |
ff0af2a1 LP |
2062 | r = enforce_user(context, uid); |
2063 | if (r < 0) { | |
2064 | *exit_status = EXIT_USER; | |
2065 | return r; | |
5b6319dc | 2066 | } |
755d4b67 IP |
2067 | if (context->capability_ambient_set != 0) { |
2068 | ||
2069 | /* Fix the ambient capabilities after user change. */ | |
2070 | r = capability_ambient_set_apply(context->capability_ambient_set, false); | |
2071 | if (r < 0) { | |
2072 | *exit_status = EXIT_CAPABILITIES; | |
2073 | return r; | |
2074 | } | |
2075 | ||
2076 | /* If we were asked to change user and ambient capabilities | |
2077 | * were requested, we had to add keep-caps to the securebits | |
2078 | * so that we would maintain the inherited capability set | |
2079 | * through the setresuid(). Make sure that the bit is added | |
2080 | * also to the context secure_bits so that we don't try to | |
2081 | * drop the bit away next. */ | |
2082 | ||
7f508f2c | 2083 | secure_bits |= 1<<SECURE_KEEP_CAPS; |
755d4b67 | 2084 | } |
5b6319dc | 2085 | } |
d35fbf6b DM |
2086 | |
2087 | /* PR_GET_SECUREBITS is not privileged, while | |
2088 | * PR_SET_SECUREBITS is. So to suppress | |
2089 | * potential EPERMs we'll try not to call | |
2090 | * PR_SET_SECUREBITS unless necessary. */ | |
755d4b67 IP |
2091 | if (prctl(PR_GET_SECUREBITS) != secure_bits) |
2092 | if (prctl(PR_SET_SECUREBITS, secure_bits) < 0) { | |
ff0af2a1 | 2093 | *exit_status = EXIT_SECUREBITS; |
d35fbf6b | 2094 | return -errno; |
ff01d048 | 2095 | } |
5b6319dc | 2096 | |
19c0b0b9 | 2097 | if (context->no_new_privileges || |
f4170c67 | 2098 | (!have_effective_cap(CAP_SYS_ADMIN) && (use_address_families || context->memory_deny_write_execute || context->restrict_realtime || use_syscall_filter))) |
d35fbf6b | 2099 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { |
ff0af2a1 | 2100 | *exit_status = EXIT_NO_NEW_PRIVILEGES; |
d35fbf6b DM |
2101 | return -errno; |
2102 | } | |
2103 | ||
2104 | #ifdef HAVE_SECCOMP | |
19c0b0b9 | 2105 | if (use_address_families) { |
ff0af2a1 LP |
2106 | r = apply_address_families(context); |
2107 | if (r < 0) { | |
2108 | *exit_status = EXIT_ADDRESS_FAMILIES; | |
2109 | return r; | |
4c2630eb MS |
2110 | } |
2111 | } | |
04aa0cb9 | 2112 | |
f3e43635 TM |
2113 | if (context->memory_deny_write_execute) { |
2114 | r = apply_memory_deny_write_execute(context); | |
2115 | if (r < 0) { | |
2116 | *exit_status = EXIT_SECCOMP; | |
2117 | return r; | |
2118 | } | |
2119 | } | |
f4170c67 LP |
2120 | |
2121 | if (context->restrict_realtime) { | |
2122 | r = apply_restrict_realtime(context); | |
2123 | if (r < 0) { | |
2124 | *exit_status = EXIT_SECCOMP; | |
2125 | return r; | |
2126 | } | |
2127 | } | |
2128 | ||
19c0b0b9 | 2129 | if (use_syscall_filter) { |
ff0af2a1 LP |
2130 | r = apply_seccomp(context); |
2131 | if (r < 0) { | |
2132 | *exit_status = EXIT_SECCOMP; | |
2133 | return r; | |
81a2b7ce | 2134 | } |
d35fbf6b DM |
2135 | } |
2136 | #endif | |
81a2b7ce | 2137 | |
d35fbf6b | 2138 | #ifdef HAVE_SELINUX |
6baa7db0 | 2139 | if (mac_selinux_use()) { |
9008e1ac | 2140 | char *exec_context = mac_selinux_context_net ?: context->selinux_context; |
16115b0a | 2141 | |
9008e1ac | 2142 | if (exec_context) { |
ff0af2a1 LP |
2143 | r = setexeccon(exec_context); |
2144 | if (r < 0) { | |
2145 | *exit_status = EXIT_SELINUX_CONTEXT; | |
2146 | return r; | |
16115b0a | 2147 | } |
81a2b7ce | 2148 | } |
81a2b7ce | 2149 | } |
d35fbf6b | 2150 | #endif |
81a2b7ce | 2151 | |
d35fbf6b | 2152 | #ifdef HAVE_APPARMOR |
6baa7db0 | 2153 | if (context->apparmor_profile && mac_apparmor_use()) { |
ff0af2a1 LP |
2154 | r = aa_change_onexec(context->apparmor_profile); |
2155 | if (r < 0 && !context->apparmor_profile_ignore) { | |
2156 | *exit_status = EXIT_APPARMOR_PROFILE; | |
5482192e | 2157 | return -errno; |
d35fbf6b | 2158 | } |
034c6ed7 | 2159 | } |
d35fbf6b DM |
2160 | #endif |
2161 | } | |
034c6ed7 | 2162 | |
2065ca69 | 2163 | final_argv = replace_env_argv(argv, accum_env); |
d35fbf6b | 2164 | if (!final_argv) { |
ff0af2a1 | 2165 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
2166 | return -ENOMEM; |
2167 | } | |
034c6ed7 | 2168 | |
2065ca69 | 2169 | accum_env = strv_env_clean(accum_env); |
260abb78 | 2170 | |
553d2243 | 2171 | if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { |
d35fbf6b | 2172 | _cleanup_free_ char *line; |
81a2b7ce | 2173 | |
d35fbf6b DM |
2174 | line = exec_command_line(final_argv); |
2175 | if (line) { | |
2176 | log_open(); | |
f2341e0a LP |
2177 | log_struct(LOG_DEBUG, |
2178 | LOG_UNIT_ID(unit), | |
2179 | "EXECUTABLE=%s", command->path, | |
2180 | LOG_UNIT_MESSAGE(unit, "Executing: %s", line), | |
2181 | NULL); | |
d35fbf6b DM |
2182 | log_close(); |
2183 | } | |
2184 | } | |
dd305ec9 | 2185 | |
2065ca69 | 2186 | execve(command->path, final_argv, accum_env); |
ff0af2a1 | 2187 | *exit_status = EXIT_EXEC; |
d35fbf6b DM |
2188 | return -errno; |
2189 | } | |
81a2b7ce | 2190 | |
f2341e0a LP |
2191 | int exec_spawn(Unit *unit, |
2192 | ExecCommand *command, | |
d35fbf6b DM |
2193 | const ExecContext *context, |
2194 | const ExecParameters *params, | |
2195 | ExecRuntime *runtime, | |
2196 | pid_t *ret) { | |
8351ceae | 2197 | |
d35fbf6b DM |
2198 | _cleanup_strv_free_ char **files_env = NULL; |
2199 | int *fds = NULL; unsigned n_fds = 0; | |
ff0af2a1 LP |
2200 | _cleanup_free_ char *line = NULL; |
2201 | int socket_fd, r; | |
2202 | char **argv; | |
d35fbf6b | 2203 | pid_t pid; |
8351ceae | 2204 | |
f2341e0a | 2205 | assert(unit); |
d35fbf6b DM |
2206 | assert(command); |
2207 | assert(context); | |
2208 | assert(ret); | |
2209 | assert(params); | |
2210 | assert(params->fds || params->n_fds <= 0); | |
4298d0b5 | 2211 | |
d35fbf6b DM |
2212 | if (context->std_input == EXEC_INPUT_SOCKET || |
2213 | context->std_output == EXEC_OUTPUT_SOCKET || | |
2214 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 2215 | |
ff0af2a1 | 2216 | if (params->n_fds != 1) { |
f2341e0a | 2217 | log_unit_error(unit, "Got more than one socket."); |
d35fbf6b | 2218 | return -EINVAL; |
ff0af2a1 | 2219 | } |
eef65bf3 | 2220 | |
d35fbf6b DM |
2221 | socket_fd = params->fds[0]; |
2222 | } else { | |
2223 | socket_fd = -1; | |
2224 | fds = params->fds; | |
2225 | n_fds = params->n_fds; | |
2226 | } | |
94f04347 | 2227 | |
f2341e0a | 2228 | r = exec_context_load_environment(unit, context, &files_env); |
ff0af2a1 | 2229 | if (r < 0) |
f2341e0a | 2230 | return log_unit_error_errno(unit, r, "Failed to load environment files: %m"); |
034c6ed7 | 2231 | |
d35fbf6b | 2232 | argv = params->argv ?: command->argv; |
d35fbf6b DM |
2233 | line = exec_command_line(argv); |
2234 | if (!line) | |
2235 | return log_oom(); | |
fab56fc5 | 2236 | |
f2341e0a LP |
2237 | log_struct(LOG_DEBUG, |
2238 | LOG_UNIT_ID(unit), | |
2239 | LOG_UNIT_MESSAGE(unit, "About to execute: %s", line), | |
2240 | "EXECUTABLE=%s", command->path, | |
2241 | NULL); | |
d35fbf6b DM |
2242 | pid = fork(); |
2243 | if (pid < 0) | |
74129a12 | 2244 | return log_unit_error_errno(unit, errno, "Failed to fork: %m"); |
d35fbf6b DM |
2245 | |
2246 | if (pid == 0) { | |
ff0af2a1 LP |
2247 | int exit_status; |
2248 | ||
f2341e0a LP |
2249 | r = exec_child(unit, |
2250 | command, | |
ff0af2a1 LP |
2251 | context, |
2252 | params, | |
2253 | runtime, | |
2254 | argv, | |
2255 | socket_fd, | |
2256 | fds, n_fds, | |
2257 | files_env, | |
2258 | &exit_status); | |
2259 | if (r < 0) { | |
4c2630eb | 2260 | log_open(); |
f2341e0a LP |
2261 | log_struct_errno(LOG_ERR, r, |
2262 | LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), | |
2263 | LOG_UNIT_ID(unit), | |
2264 | LOG_UNIT_MESSAGE(unit, "Failed at step %s spawning %s: %m", | |
2265 | exit_status_to_string(exit_status, EXIT_STATUS_SYSTEMD), | |
2266 | command->path), | |
2267 | "EXECUTABLE=%s", command->path, | |
2268 | NULL); | |
4c2630eb MS |
2269 | } |
2270 | ||
ff0af2a1 | 2271 | _exit(exit_status); |
034c6ed7 LP |
2272 | } |
2273 | ||
f2341e0a | 2274 | log_unit_debug(unit, "Forked %s as "PID_FMT, command->path, pid); |
23635a85 | 2275 | |
80876c20 LP |
2276 | /* We add the new process to the cgroup both in the child (so |
2277 | * that we can be sure that no user code is ever executed | |
2278 | * outside of the cgroup) and in the parent (so that we can be | |
2279 | * sure that when we kill the cgroup the process will be | |
2280 | * killed too). */ | |
d35fbf6b | 2281 | if (params->cgroup_path) |
dd305ec9 | 2282 | (void) cg_attach(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, pid); |
2da3263a | 2283 | |
b58b4116 | 2284 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 2285 | |
034c6ed7 | 2286 | *ret = pid; |
5cb5a6ff LP |
2287 | return 0; |
2288 | } | |
2289 | ||
034c6ed7 LP |
2290 | void exec_context_init(ExecContext *c) { |
2291 | assert(c); | |
2292 | ||
4c12626c | 2293 | c->umask = 0022; |
9eba9da4 | 2294 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 2295 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 2296 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 2297 | c->syslog_level_prefix = true; |
353e12c2 | 2298 | c->ignore_sigpipe = true; |
3a43da28 | 2299 | c->timer_slack_nsec = NSEC_INFINITY; |
050f7277 | 2300 | c->personality = PERSONALITY_INVALID; |
e66cf1a3 | 2301 | c->runtime_directory_mode = 0755; |
a103496c | 2302 | c->capability_bounding_set = CAP_ALL; |
034c6ed7 LP |
2303 | } |
2304 | ||
613b411c | 2305 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
2306 | unsigned l; |
2307 | ||
2308 | assert(c); | |
2309 | ||
6796073e LP |
2310 | c->environment = strv_free(c->environment); |
2311 | c->environment_files = strv_free(c->environment_files); | |
b4c14404 | 2312 | c->pass_environment = strv_free(c->pass_environment); |
8c7be95e | 2313 | |
1f6b4113 | 2314 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) |
a1e58e8e | 2315 | c->rlimit[l] = mfree(c->rlimit[l]); |
034c6ed7 | 2316 | |
a1e58e8e LP |
2317 | c->working_directory = mfree(c->working_directory); |
2318 | c->root_directory = mfree(c->root_directory); | |
2319 | c->tty_path = mfree(c->tty_path); | |
2320 | c->syslog_identifier = mfree(c->syslog_identifier); | |
2321 | c->user = mfree(c->user); | |
2322 | c->group = mfree(c->group); | |
034c6ed7 | 2323 | |
6796073e | 2324 | c->supplementary_groups = strv_free(c->supplementary_groups); |
94f04347 | 2325 | |
a1e58e8e | 2326 | c->pam_name = mfree(c->pam_name); |
5b6319dc | 2327 | |
6796073e LP |
2328 | c->read_only_dirs = strv_free(c->read_only_dirs); |
2329 | c->read_write_dirs = strv_free(c->read_write_dirs); | |
2330 | c->inaccessible_dirs = strv_free(c->inaccessible_dirs); | |
82c121a4 LP |
2331 | |
2332 | if (c->cpuset) | |
2333 | CPU_FREE(c->cpuset); | |
86a3475b | 2334 | |
a1e58e8e LP |
2335 | c->utmp_id = mfree(c->utmp_id); |
2336 | c->selinux_context = mfree(c->selinux_context); | |
2337 | c->apparmor_profile = mfree(c->apparmor_profile); | |
eef65bf3 | 2338 | |
525d3cc7 LP |
2339 | c->syscall_filter = set_free(c->syscall_filter); |
2340 | c->syscall_archs = set_free(c->syscall_archs); | |
2341 | c->address_families = set_free(c->address_families); | |
e66cf1a3 | 2342 | |
6796073e | 2343 | c->runtime_directory = strv_free(c->runtime_directory); |
e66cf1a3 LP |
2344 | } |
2345 | ||
2346 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) { | |
2347 | char **i; | |
2348 | ||
2349 | assert(c); | |
2350 | ||
2351 | if (!runtime_prefix) | |
2352 | return 0; | |
2353 | ||
2354 | STRV_FOREACH(i, c->runtime_directory) { | |
2355 | _cleanup_free_ char *p; | |
2356 | ||
2357 | p = strjoin(runtime_prefix, "/", *i, NULL); | |
2358 | if (!p) | |
2359 | return -ENOMEM; | |
2360 | ||
2361 | /* We execute this synchronously, since we need to be | |
2362 | * sure this is gone when we start the service | |
2363 | * next. */ | |
c6878637 | 2364 | (void) rm_rf(p, REMOVE_ROOT); |
e66cf1a3 LP |
2365 | } |
2366 | ||
2367 | return 0; | |
5cb5a6ff LP |
2368 | } |
2369 | ||
43d0fcbd LP |
2370 | void exec_command_done(ExecCommand *c) { |
2371 | assert(c); | |
2372 | ||
a1e58e8e | 2373 | c->path = mfree(c->path); |
43d0fcbd | 2374 | |
6796073e | 2375 | c->argv = strv_free(c->argv); |
43d0fcbd LP |
2376 | } |
2377 | ||
2378 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
2379 | unsigned i; | |
2380 | ||
2381 | for (i = 0; i < n; i++) | |
2382 | exec_command_done(c+i); | |
2383 | } | |
2384 | ||
f1acf85a | 2385 | ExecCommand* exec_command_free_list(ExecCommand *c) { |
5cb5a6ff LP |
2386 | ExecCommand *i; |
2387 | ||
2388 | while ((i = c)) { | |
71fda00f | 2389 | LIST_REMOVE(command, c, i); |
43d0fcbd | 2390 | exec_command_done(i); |
5cb5a6ff LP |
2391 | free(i); |
2392 | } | |
f1acf85a ZJS |
2393 | |
2394 | return NULL; | |
5cb5a6ff LP |
2395 | } |
2396 | ||
034c6ed7 LP |
2397 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
2398 | unsigned i; | |
2399 | ||
f1acf85a ZJS |
2400 | for (i = 0; i < n; i++) |
2401 | c[i] = exec_command_free_list(c[i]); | |
034c6ed7 LP |
2402 | } |
2403 | ||
039f0e70 | 2404 | typedef struct InvalidEnvInfo { |
f2341e0a | 2405 | Unit *unit; |
039f0e70 LP |
2406 | const char *path; |
2407 | } InvalidEnvInfo; | |
2408 | ||
2409 | static void invalid_env(const char *p, void *userdata) { | |
2410 | InvalidEnvInfo *info = userdata; | |
2411 | ||
f2341e0a | 2412 | log_unit_error(info->unit, "Ignoring invalid environment assignment '%s': %s", p, info->path); |
039f0e70 LP |
2413 | } |
2414 | ||
f2341e0a | 2415 | int exec_context_load_environment(Unit *unit, const ExecContext *c, char ***l) { |
8c7be95e LP |
2416 | char **i, **r = NULL; |
2417 | ||
2418 | assert(c); | |
2419 | assert(l); | |
2420 | ||
2421 | STRV_FOREACH(i, c->environment_files) { | |
2422 | char *fn; | |
2423 | int k; | |
2424 | bool ignore = false; | |
2425 | char **p; | |
7fd1b19b | 2426 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 2427 | int count, n; |
8c7be95e LP |
2428 | |
2429 | fn = *i; | |
2430 | ||
2431 | if (fn[0] == '-') { | |
2432 | ignore = true; | |
313cefa1 | 2433 | fn++; |
8c7be95e LP |
2434 | } |
2435 | ||
2436 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
2437 | if (ignore) |
2438 | continue; | |
2439 | ||
2440 | strv_free(r); | |
2441 | return -EINVAL; | |
2442 | } | |
2443 | ||
2bef10ab | 2444 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
2445 | errno = 0; |
2446 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
2447 | if (ignore) |
2448 | continue; | |
8c7be95e | 2449 | |
2bef10ab | 2450 | strv_free(r); |
f5e5c28f | 2451 | return errno > 0 ? -errno : -EINVAL; |
2bef10ab PL |
2452 | } |
2453 | count = pglob.gl_pathc; | |
2454 | if (count == 0) { | |
8c7be95e LP |
2455 | if (ignore) |
2456 | continue; | |
2457 | ||
2458 | strv_free(r); | |
2bef10ab | 2459 | return -EINVAL; |
8c7be95e | 2460 | } |
2bef10ab | 2461 | for (n = 0; n < count; n++) { |
717603e3 | 2462 | k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
2463 | if (k < 0) { |
2464 | if (ignore) | |
2465 | continue; | |
8c7be95e | 2466 | |
2bef10ab | 2467 | strv_free(r); |
2bef10ab | 2468 | return k; |
e9c1ea9d | 2469 | } |
ebc05a09 | 2470 | /* Log invalid environment variables with filename */ |
039f0e70 LP |
2471 | if (p) { |
2472 | InvalidEnvInfo info = { | |
f2341e0a | 2473 | .unit = unit, |
039f0e70 LP |
2474 | .path = pglob.gl_pathv[n] |
2475 | }; | |
2476 | ||
2477 | p = strv_env_clean_with_callback(p, invalid_env, &info); | |
2478 | } | |
8c7be95e | 2479 | |
2bef10ab PL |
2480 | if (r == NULL) |
2481 | r = p; | |
2482 | else { | |
2483 | char **m; | |
8c7be95e | 2484 | |
2bef10ab PL |
2485 | m = strv_env_merge(2, r, p); |
2486 | strv_free(r); | |
2487 | strv_free(p); | |
c84a9488 | 2488 | if (!m) |
2bef10ab | 2489 | return -ENOMEM; |
2bef10ab PL |
2490 | |
2491 | r = m; | |
2492 | } | |
8c7be95e LP |
2493 | } |
2494 | } | |
2495 | ||
2496 | *l = r; | |
2497 | ||
2498 | return 0; | |
2499 | } | |
2500 | ||
6ac8fdc9 | 2501 | static bool tty_may_match_dev_console(const char *tty) { |
e1d75803 | 2502 | _cleanup_free_ char *active = NULL; |
7d6884b6 | 2503 | char *console; |
6ac8fdc9 | 2504 | |
1e22b5cd LP |
2505 | if (!tty) |
2506 | return true; | |
2507 | ||
6ac8fdc9 MS |
2508 | if (startswith(tty, "/dev/")) |
2509 | tty += 5; | |
2510 | ||
2511 | /* trivial identity? */ | |
2512 | if (streq(tty, "console")) | |
2513 | return true; | |
2514 | ||
2515 | console = resolve_dev_console(&active); | |
2516 | /* if we could not resolve, assume it may */ | |
2517 | if (!console) | |
2518 | return true; | |
2519 | ||
2520 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
e1d75803 | 2521 | return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
2522 | } |
2523 | ||
2524 | bool exec_context_may_touch_console(ExecContext *ec) { | |
1e22b5cd LP |
2525 | |
2526 | return (ec->tty_reset || | |
2527 | ec->tty_vhangup || | |
2528 | ec->tty_vt_disallocate || | |
6ac8fdc9 MS |
2529 | is_terminal_input(ec->std_input) || |
2530 | is_terminal_output(ec->std_output) || | |
2531 | is_terminal_output(ec->std_error)) && | |
1e22b5cd | 2532 | tty_may_match_dev_console(exec_context_tty_path(ec)); |
6ac8fdc9 MS |
2533 | } |
2534 | ||
15ae422b LP |
2535 | static void strv_fprintf(FILE *f, char **l) { |
2536 | char **g; | |
2537 | ||
2538 | assert(f); | |
2539 | ||
2540 | STRV_FOREACH(g, l) | |
2541 | fprintf(f, " %s", *g); | |
2542 | } | |
2543 | ||
5cb5a6ff | 2544 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
c2bbd90b | 2545 | char **e, **d; |
94f04347 | 2546 | unsigned i; |
9eba9da4 | 2547 | |
5cb5a6ff LP |
2548 | assert(c); |
2549 | assert(f); | |
2550 | ||
4ad49000 | 2551 | prefix = strempty(prefix); |
5cb5a6ff LP |
2552 | |
2553 | fprintf(f, | |
94f04347 LP |
2554 | "%sUMask: %04o\n" |
2555 | "%sWorkingDirectory: %s\n" | |
451a074f | 2556 | "%sRootDirectory: %s\n" |
15ae422b | 2557 | "%sNonBlocking: %s\n" |
64747e2d | 2558 | "%sPrivateTmp: %s\n" |
4819ff03 | 2559 | "%sPrivateNetwork: %s\n" |
7f112f50 | 2560 | "%sPrivateDevices: %s\n" |
1b8689f9 LP |
2561 | "%sProtectHome: %s\n" |
2562 | "%sProtectSystem: %s\n" | |
f3e43635 | 2563 | "%sIgnoreSIGPIPE: %s\n" |
f4170c67 LP |
2564 | "%sMemoryDenyWriteExecute: %s\n" |
2565 | "%sRestrictRealtime: %s\n", | |
5cb5a6ff | 2566 | prefix, c->umask, |
9eba9da4 | 2567 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 2568 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 2569 | prefix, yes_no(c->non_blocking), |
64747e2d | 2570 | prefix, yes_no(c->private_tmp), |
4819ff03 | 2571 | prefix, yes_no(c->private_network), |
7f112f50 | 2572 | prefix, yes_no(c->private_devices), |
1b8689f9 LP |
2573 | prefix, protect_home_to_string(c->protect_home), |
2574 | prefix, protect_system_to_string(c->protect_system), | |
f3e43635 | 2575 | prefix, yes_no(c->ignore_sigpipe), |
f4170c67 LP |
2576 | prefix, yes_no(c->memory_deny_write_execute), |
2577 | prefix, yes_no(c->restrict_realtime)); | |
fb33a393 | 2578 | |
8c7be95e LP |
2579 | STRV_FOREACH(e, c->environment) |
2580 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
2581 | ||
2582 | STRV_FOREACH(e, c->environment_files) | |
2583 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 2584 | |
b4c14404 FB |
2585 | STRV_FOREACH(e, c->pass_environment) |
2586 | fprintf(f, "%sPassEnvironment: %s\n", prefix, *e); | |
2587 | ||
c2bbd90b EV |
2588 | fprintf(f, "%sRuntimeDirectoryMode: %04o\n", prefix, c->runtime_directory_mode); |
2589 | ||
2590 | STRV_FOREACH(d, c->runtime_directory) | |
2591 | fprintf(f, "%sRuntimeDirectory: %s\n", prefix, *d); | |
2592 | ||
fb33a393 LP |
2593 | if (c->nice_set) |
2594 | fprintf(f, | |
2595 | "%sNice: %i\n", | |
2596 | prefix, c->nice); | |
2597 | ||
dd6c17b1 | 2598 | if (c->oom_score_adjust_set) |
fb33a393 | 2599 | fprintf(f, |
dd6c17b1 LP |
2600 | "%sOOMScoreAdjust: %i\n", |
2601 | prefix, c->oom_score_adjust); | |
9eba9da4 | 2602 | |
94f04347 | 2603 | for (i = 0; i < RLIM_NLIMITS; i++) |
3c11da9d EV |
2604 | if (c->rlimit[i]) { |
2605 | fprintf(f, "%s%s: " RLIM_FMT "\n", | |
2606 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); | |
2607 | fprintf(f, "%s%sSoft: " RLIM_FMT "\n", | |
2608 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_cur); | |
2609 | } | |
94f04347 | 2610 | |
f8b69d1d | 2611 | if (c->ioprio_set) { |
1756a011 | 2612 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 2613 | |
1756a011 | 2614 | ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); |
9eba9da4 LP |
2615 | fprintf(f, |
2616 | "%sIOSchedulingClass: %s\n" | |
2617 | "%sIOPriority: %i\n", | |
f8b69d1d | 2618 | prefix, strna(class_str), |
9eba9da4 | 2619 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d | 2620 | } |
94f04347 | 2621 | |
f8b69d1d | 2622 | if (c->cpu_sched_set) { |
1756a011 | 2623 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 2624 | |
1756a011 | 2625 | sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
94f04347 LP |
2626 | fprintf(f, |
2627 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
2628 | "%sCPUSchedulingPriority: %i\n" |
2629 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 2630 | prefix, strna(policy_str), |
38b48754 LP |
2631 | prefix, c->cpu_sched_priority, |
2632 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 2633 | } |
94f04347 | 2634 | |
82c121a4 | 2635 | if (c->cpuset) { |
94f04347 | 2636 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
2637 | for (i = 0; i < c->cpuset_ncpus; i++) |
2638 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
43a99a7a | 2639 | fprintf(f, " %u", i); |
94f04347 LP |
2640 | fputs("\n", f); |
2641 | } | |
2642 | ||
3a43da28 | 2643 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 2644 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
2645 | |
2646 | fprintf(f, | |
80876c20 LP |
2647 | "%sStandardInput: %s\n" |
2648 | "%sStandardOutput: %s\n" | |
2649 | "%sStandardError: %s\n", | |
2650 | prefix, exec_input_to_string(c->std_input), | |
2651 | prefix, exec_output_to_string(c->std_output), | |
2652 | prefix, exec_output_to_string(c->std_error)); | |
2653 | ||
2654 | if (c->tty_path) | |
2655 | fprintf(f, | |
6ea832a2 LP |
2656 | "%sTTYPath: %s\n" |
2657 | "%sTTYReset: %s\n" | |
2658 | "%sTTYVHangup: %s\n" | |
2659 | "%sTTYVTDisallocate: %s\n", | |
2660 | prefix, c->tty_path, | |
2661 | prefix, yes_no(c->tty_reset), | |
2662 | prefix, yes_no(c->tty_vhangup), | |
2663 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 2664 | |
5ce70e5b ZJS |
2665 | if (c->std_output == EXEC_OUTPUT_SYSLOG || |
2666 | c->std_output == EXEC_OUTPUT_KMSG || | |
2667 | c->std_output == EXEC_OUTPUT_JOURNAL || | |
2668 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2669 | c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2670 | c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
2671 | c->std_error == EXEC_OUTPUT_SYSLOG || | |
2672 | c->std_error == EXEC_OUTPUT_KMSG || | |
2673 | c->std_error == EXEC_OUTPUT_JOURNAL || | |
2674 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2675 | c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2676 | c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { | |
f8b69d1d | 2677 | |
5ce70e5b | 2678 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 2679 | |
5ce70e5b ZJS |
2680 | log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
2681 | log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
f8b69d1d | 2682 | |
94f04347 LP |
2683 | fprintf(f, |
2684 | "%sSyslogFacility: %s\n" | |
2685 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
2686 | prefix, strna(fac_str), |
2687 | prefix, strna(lvl_str)); | |
f8b69d1d | 2688 | } |
94f04347 | 2689 | |
94f04347 LP |
2690 | if (c->secure_bits) |
2691 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
2692 | prefix, | |
cbb21cca ZJS |
2693 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
2694 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
2695 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
2696 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
2697 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
2698 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 | 2699 | |
a103496c | 2700 | if (c->capability_bounding_set != CAP_ALL) { |
ae556c21 | 2701 | unsigned long l; |
260abb78 | 2702 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2703 | |
64685e0c | 2704 | for (l = 0; l <= cap_last_cap(); l++) |
a103496c | 2705 | if (c->capability_bounding_set & (UINT64_C(1) << l)) |
2822da4f | 2706 | fprintf(f, " %s", strna(capability_to_name(l))); |
94f04347 LP |
2707 | |
2708 | fputs("\n", f); | |
755d4b67 IP |
2709 | } |
2710 | ||
2711 | if (c->capability_ambient_set != 0) { | |
2712 | unsigned long l; | |
2713 | fprintf(f, "%sAmbientCapabilities:", prefix); | |
2714 | ||
2715 | for (l = 0; l <= cap_last_cap(); l++) | |
2716 | if (c->capability_ambient_set & (UINT64_C(1) << l)) | |
2717 | fprintf(f, " %s", strna(capability_to_name(l))); | |
2718 | ||
2719 | fputs("\n", f); | |
94f04347 LP |
2720 | } |
2721 | ||
2722 | if (c->user) | |
f2d3769a | 2723 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2724 | if (c->group) |
f2d3769a | 2725 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2726 | |
15ae422b | 2727 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2728 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2729 | strv_fprintf(f, c->supplementary_groups); |
2730 | fputs("\n", f); | |
2731 | } | |
94f04347 | 2732 | |
5b6319dc | 2733 | if (c->pam_name) |
f2d3769a | 2734 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2735 | |
15ae422b LP |
2736 | if (strv_length(c->read_write_dirs) > 0) { |
2737 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2738 | strv_fprintf(f, c->read_write_dirs); | |
2739 | fputs("\n", f); | |
2740 | } | |
2741 | ||
2742 | if (strv_length(c->read_only_dirs) > 0) { | |
2743 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2744 | strv_fprintf(f, c->read_only_dirs); | |
2745 | fputs("\n", f); | |
2746 | } | |
94f04347 | 2747 | |
15ae422b LP |
2748 | if (strv_length(c->inaccessible_dirs) > 0) { |
2749 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2750 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2751 | fputs("\n", f); |
2752 | } | |
2e22afe9 | 2753 | |
169c1bda LP |
2754 | if (c->utmp_id) |
2755 | fprintf(f, | |
2756 | "%sUtmpIdentifier: %s\n", | |
2757 | prefix, c->utmp_id); | |
7b52a628 MS |
2758 | |
2759 | if (c->selinux_context) | |
2760 | fprintf(f, | |
5f8640fb LP |
2761 | "%sSELinuxContext: %s%s\n", |
2762 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 2763 | |
050f7277 | 2764 | if (c->personality != PERSONALITY_INVALID) |
ac45f971 LP |
2765 | fprintf(f, |
2766 | "%sPersonality: %s\n", | |
2767 | prefix, strna(personality_to_string(c->personality))); | |
2768 | ||
17df7223 | 2769 | if (c->syscall_filter) { |
351a19b1 | 2770 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2771 | Iterator j; |
2772 | void *id; | |
2773 | bool first = true; | |
351a19b1 | 2774 | #endif |
17df7223 LP |
2775 | |
2776 | fprintf(f, | |
57183d11 | 2777 | "%sSystemCallFilter: ", |
17df7223 LP |
2778 | prefix); |
2779 | ||
2780 | if (!c->syscall_whitelist) | |
2781 | fputc('~', f); | |
2782 | ||
351a19b1 | 2783 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2784 | SET_FOREACH(id, c->syscall_filter, j) { |
2785 | _cleanup_free_ char *name = NULL; | |
2786 | ||
2787 | if (first) | |
2788 | first = false; | |
2789 | else | |
2790 | fputc(' ', f); | |
2791 | ||
57183d11 | 2792 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 LP |
2793 | fputs(strna(name), f); |
2794 | } | |
351a19b1 | 2795 | #endif |
17df7223 LP |
2796 | |
2797 | fputc('\n', f); | |
2798 | } | |
2799 | ||
57183d11 LP |
2800 | if (c->syscall_archs) { |
2801 | #ifdef HAVE_SECCOMP | |
2802 | Iterator j; | |
2803 | void *id; | |
2804 | #endif | |
2805 | ||
2806 | fprintf(f, | |
2807 | "%sSystemCallArchitectures:", | |
2808 | prefix); | |
2809 | ||
2810 | #ifdef HAVE_SECCOMP | |
2811 | SET_FOREACH(id, c->syscall_archs, j) | |
2812 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); | |
2813 | #endif | |
2814 | fputc('\n', f); | |
2815 | } | |
2816 | ||
b3267152 | 2817 | if (c->syscall_errno > 0) |
17df7223 LP |
2818 | fprintf(f, |
2819 | "%sSystemCallErrorNumber: %s\n", | |
2820 | prefix, strna(errno_to_name(c->syscall_errno))); | |
eef65bf3 MS |
2821 | |
2822 | if (c->apparmor_profile) | |
2823 | fprintf(f, | |
2824 | "%sAppArmorProfile: %s%s\n", | |
2825 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
5cb5a6ff LP |
2826 | } |
2827 | ||
a931ad47 LP |
2828 | bool exec_context_maintains_privileges(ExecContext *c) { |
2829 | assert(c); | |
2830 | ||
2831 | /* Returns true if the process forked off would run run under | |
2832 | * an unchanged UID or as root. */ | |
2833 | ||
2834 | if (!c->user) | |
2835 | return true; | |
2836 | ||
2837 | if (streq(c->user, "root") || streq(c->user, "0")) | |
2838 | return true; | |
2839 | ||
2840 | return false; | |
2841 | } | |
2842 | ||
b58b4116 | 2843 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2844 | assert(s); |
5cb5a6ff | 2845 | |
b58b4116 LP |
2846 | zero(*s); |
2847 | s->pid = pid; | |
2848 | dual_timestamp_get(&s->start_timestamp); | |
2849 | } | |
2850 | ||
6ea832a2 | 2851 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2852 | assert(s); |
2853 | ||
0b1f4ae6 | 2854 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2855 | zero(*s); |
2856 | ||
034c6ed7 | 2857 | s->pid = pid; |
63983207 | 2858 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2859 | |
034c6ed7 LP |
2860 | s->code = code; |
2861 | s->status = status; | |
169c1bda | 2862 | |
6ea832a2 LP |
2863 | if (context) { |
2864 | if (context->utmp_id) | |
2865 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2866 | ||
1e22b5cd | 2867 | exec_context_tty_reset(context, NULL); |
6ea832a2 | 2868 | } |
9fb86720 LP |
2869 | } |
2870 | ||
2871 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2872 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2873 | ||
2874 | assert(s); | |
2875 | assert(f); | |
2876 | ||
9fb86720 LP |
2877 | if (s->pid <= 0) |
2878 | return; | |
2879 | ||
4c940960 LP |
2880 | prefix = strempty(prefix); |
2881 | ||
9fb86720 | 2882 | fprintf(f, |
ccd06097 ZJS |
2883 | "%sPID: "PID_FMT"\n", |
2884 | prefix, s->pid); | |
9fb86720 | 2885 | |
63983207 | 2886 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2887 | fprintf(f, |
2888 | "%sStart Timestamp: %s\n", | |
63983207 | 2889 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2890 | |
63983207 | 2891 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2892 | fprintf(f, |
2893 | "%sExit Timestamp: %s\n" | |
2894 | "%sExit Code: %s\n" | |
2895 | "%sExit Status: %i\n", | |
63983207 | 2896 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2897 | prefix, sigchld_code_to_string(s->code), |
2898 | prefix, s->status); | |
5cb5a6ff | 2899 | } |
44d8db9e | 2900 | |
9e2f7c11 | 2901 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2902 | size_t k; |
2903 | char *n, *p, **a; | |
2904 | bool first = true; | |
2905 | ||
9e2f7c11 | 2906 | assert(argv); |
44d8db9e | 2907 | |
9164977d | 2908 | k = 1; |
9e2f7c11 | 2909 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2910 | k += strlen(*a)+3; |
2911 | ||
2912 | if (!(n = new(char, k))) | |
2913 | return NULL; | |
2914 | ||
2915 | p = n; | |
9e2f7c11 | 2916 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2917 | |
2918 | if (!first) | |
2919 | *(p++) = ' '; | |
2920 | else | |
2921 | first = false; | |
2922 | ||
2923 | if (strpbrk(*a, WHITESPACE)) { | |
2924 | *(p++) = '\''; | |
2925 | p = stpcpy(p, *a); | |
2926 | *(p++) = '\''; | |
2927 | } else | |
2928 | p = stpcpy(p, *a); | |
2929 | ||
2930 | } | |
2931 | ||
9164977d LP |
2932 | *p = 0; |
2933 | ||
44d8db9e LP |
2934 | /* FIXME: this doesn't really handle arguments that have |
2935 | * spaces and ticks in them */ | |
2936 | ||
2937 | return n; | |
2938 | } | |
2939 | ||
2940 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
e1d75803 | 2941 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 2942 | const char *prefix2; |
44d8db9e LP |
2943 | |
2944 | assert(c); | |
2945 | assert(f); | |
2946 | ||
4c940960 | 2947 | prefix = strempty(prefix); |
63c372cb | 2948 | prefix2 = strjoina(prefix, "\t"); |
44d8db9e | 2949 | |
9e2f7c11 | 2950 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2951 | fprintf(f, |
2952 | "%sCommand Line: %s\n", | |
2953 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2954 | ||
9fb86720 | 2955 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
2956 | } |
2957 | ||
2958 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2959 | assert(f); | |
2960 | ||
4c940960 | 2961 | prefix = strempty(prefix); |
44d8db9e LP |
2962 | |
2963 | LIST_FOREACH(command, c, c) | |
2964 | exec_command_dump(c, f, prefix); | |
2965 | } | |
94f04347 | 2966 | |
a6a80b4f LP |
2967 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2968 | ExecCommand *end; | |
2969 | ||
2970 | assert(l); | |
2971 | assert(e); | |
2972 | ||
2973 | if (*l) { | |
35b8ca3a | 2974 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2975 | LIST_FIND_TAIL(command, *l, end); |
2976 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2977 | } else |
2978 | *l = e; | |
2979 | } | |
2980 | ||
26fd040d LP |
2981 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2982 | va_list ap; | |
2983 | char **l, *p; | |
2984 | ||
2985 | assert(c); | |
2986 | assert(path); | |
2987 | ||
2988 | va_start(ap, path); | |
2989 | l = strv_new_ap(path, ap); | |
2990 | va_end(ap); | |
2991 | ||
2992 | if (!l) | |
2993 | return -ENOMEM; | |
2994 | ||
250a918d LP |
2995 | p = strdup(path); |
2996 | if (!p) { | |
26fd040d LP |
2997 | strv_free(l); |
2998 | return -ENOMEM; | |
2999 | } | |
3000 | ||
3001 | free(c->path); | |
3002 | c->path = p; | |
3003 | ||
3004 | strv_free(c->argv); | |
3005 | c->argv = l; | |
3006 | ||
3007 | return 0; | |
3008 | } | |
3009 | ||
86b23b07 | 3010 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 3011 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 3012 | va_list ap; |
86b23b07 JS |
3013 | int r; |
3014 | ||
3015 | assert(c); | |
3016 | assert(path); | |
3017 | ||
3018 | va_start(ap, path); | |
3019 | l = strv_new_ap(path, ap); | |
3020 | va_end(ap); | |
3021 | ||
3022 | if (!l) | |
3023 | return -ENOMEM; | |
3024 | ||
e287086b | 3025 | r = strv_extend_strv(&c->argv, l, false); |
e63ff941 | 3026 | if (r < 0) |
86b23b07 | 3027 | return r; |
86b23b07 JS |
3028 | |
3029 | return 0; | |
3030 | } | |
3031 | ||
3032 | ||
613b411c LP |
3033 | static int exec_runtime_allocate(ExecRuntime **rt) { |
3034 | ||
3035 | if (*rt) | |
3036 | return 0; | |
3037 | ||
3038 | *rt = new0(ExecRuntime, 1); | |
f146f5e1 | 3039 | if (!*rt) |
613b411c LP |
3040 | return -ENOMEM; |
3041 | ||
3042 | (*rt)->n_ref = 1; | |
3043 | (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1; | |
3044 | ||
3045 | return 0; | |
3046 | } | |
3047 | ||
3048 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) { | |
3049 | int r; | |
3050 | ||
3051 | assert(rt); | |
3052 | assert(c); | |
3053 | assert(id); | |
3054 | ||
3055 | if (*rt) | |
3056 | return 1; | |
3057 | ||
3058 | if (!c->private_network && !c->private_tmp) | |
3059 | return 0; | |
3060 | ||
3061 | r = exec_runtime_allocate(rt); | |
3062 | if (r < 0) | |
3063 | return r; | |
3064 | ||
3065 | if (c->private_network && (*rt)->netns_storage_socket[0] < 0) { | |
3066 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0) | |
3067 | return -errno; | |
3068 | } | |
3069 | ||
3070 | if (c->private_tmp && !(*rt)->tmp_dir) { | |
3071 | r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir); | |
3072 | if (r < 0) | |
3073 | return r; | |
3074 | } | |
3075 | ||
3076 | return 1; | |
3077 | } | |
3078 | ||
3079 | ExecRuntime *exec_runtime_ref(ExecRuntime *r) { | |
3080 | assert(r); | |
3081 | assert(r->n_ref > 0); | |
3082 | ||
3083 | r->n_ref++; | |
3084 | return r; | |
3085 | } | |
3086 | ||
3087 | ExecRuntime *exec_runtime_unref(ExecRuntime *r) { | |
3088 | ||
3089 | if (!r) | |
3090 | return NULL; | |
3091 | ||
3092 | assert(r->n_ref > 0); | |
3093 | ||
3094 | r->n_ref--; | |
f2341e0a LP |
3095 | if (r->n_ref > 0) |
3096 | return NULL; | |
3097 | ||
3098 | free(r->tmp_dir); | |
3099 | free(r->var_tmp_dir); | |
3100 | safe_close_pair(r->netns_storage_socket); | |
3101 | free(r); | |
613b411c LP |
3102 | |
3103 | return NULL; | |
3104 | } | |
3105 | ||
f2341e0a | 3106 | int exec_runtime_serialize(Unit *u, ExecRuntime *rt, FILE *f, FDSet *fds) { |
613b411c LP |
3107 | assert(u); |
3108 | assert(f); | |
3109 | assert(fds); | |
3110 | ||
3111 | if (!rt) | |
3112 | return 0; | |
3113 | ||
3114 | if (rt->tmp_dir) | |
3115 | unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir); | |
3116 | ||
3117 | if (rt->var_tmp_dir) | |
3118 | unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir); | |
3119 | ||
3120 | if (rt->netns_storage_socket[0] >= 0) { | |
3121 | int copy; | |
3122 | ||
3123 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); | |
3124 | if (copy < 0) | |
3125 | return copy; | |
3126 | ||
3127 | unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy); | |
3128 | } | |
3129 | ||
3130 | if (rt->netns_storage_socket[1] >= 0) { | |
3131 | int copy; | |
3132 | ||
3133 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); | |
3134 | if (copy < 0) | |
3135 | return copy; | |
3136 | ||
3137 | unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy); | |
3138 | } | |
3139 | ||
3140 | return 0; | |
3141 | } | |
3142 | ||
f2341e0a | 3143 | int exec_runtime_deserialize_item(Unit *u, ExecRuntime **rt, const char *key, const char *value, FDSet *fds) { |
613b411c LP |
3144 | int r; |
3145 | ||
3146 | assert(rt); | |
3147 | assert(key); | |
3148 | assert(value); | |
3149 | ||
3150 | if (streq(key, "tmp-dir")) { | |
3151 | char *copy; | |
3152 | ||
3153 | r = exec_runtime_allocate(rt); | |
3154 | if (r < 0) | |
f2341e0a | 3155 | return log_oom(); |
613b411c LP |
3156 | |
3157 | copy = strdup(value); | |
3158 | if (!copy) | |
3159 | return log_oom(); | |
3160 | ||
3161 | free((*rt)->tmp_dir); | |
3162 | (*rt)->tmp_dir = copy; | |
3163 | ||
3164 | } else if (streq(key, "var-tmp-dir")) { | |
3165 | char *copy; | |
3166 | ||
3167 | r = exec_runtime_allocate(rt); | |
3168 | if (r < 0) | |
f2341e0a | 3169 | return log_oom(); |
613b411c LP |
3170 | |
3171 | copy = strdup(value); | |
3172 | if (!copy) | |
3173 | return log_oom(); | |
3174 | ||
3175 | free((*rt)->var_tmp_dir); | |
3176 | (*rt)->var_tmp_dir = copy; | |
3177 | ||
3178 | } else if (streq(key, "netns-socket-0")) { | |
3179 | int fd; | |
3180 | ||
3181 | r = exec_runtime_allocate(rt); | |
3182 | if (r < 0) | |
f2341e0a | 3183 | return log_oom(); |
613b411c LP |
3184 | |
3185 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 3186 | log_unit_debug(u, "Failed to parse netns socket value: %s", value); |
613b411c | 3187 | else { |
03e334a1 | 3188 | safe_close((*rt)->netns_storage_socket[0]); |
613b411c LP |
3189 | (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd); |
3190 | } | |
3191 | } else if (streq(key, "netns-socket-1")) { | |
3192 | int fd; | |
3193 | ||
3194 | r = exec_runtime_allocate(rt); | |
3195 | if (r < 0) | |
f2341e0a | 3196 | return log_oom(); |
613b411c LP |
3197 | |
3198 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
f2341e0a | 3199 | log_unit_debug(u, "Failed to parse netns socket value: %s", value); |
613b411c | 3200 | else { |
03e334a1 | 3201 | safe_close((*rt)->netns_storage_socket[1]); |
613b411c LP |
3202 | (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd); |
3203 | } | |
3204 | } else | |
3205 | return 0; | |
3206 | ||
3207 | return 1; | |
3208 | } | |
3209 | ||
3210 | static void *remove_tmpdir_thread(void *p) { | |
3211 | _cleanup_free_ char *path = p; | |
3212 | ||
c6878637 | 3213 | (void) rm_rf(path, REMOVE_ROOT|REMOVE_PHYSICAL); |
613b411c LP |
3214 | return NULL; |
3215 | } | |
3216 | ||
3217 | void exec_runtime_destroy(ExecRuntime *rt) { | |
98b47d54 LP |
3218 | int r; |
3219 | ||
613b411c LP |
3220 | if (!rt) |
3221 | return; | |
3222 | ||
3223 | /* If there are multiple users of this, let's leave the stuff around */ | |
3224 | if (rt->n_ref > 1) | |
3225 | return; | |
3226 | ||
3227 | if (rt->tmp_dir) { | |
3228 | log_debug("Spawning thread to nuke %s", rt->tmp_dir); | |
98b47d54 LP |
3229 | |
3230 | r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir); | |
3231 | if (r < 0) { | |
da927ba9 | 3232 | log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir); |
98b47d54 LP |
3233 | free(rt->tmp_dir); |
3234 | } | |
3235 | ||
613b411c LP |
3236 | rt->tmp_dir = NULL; |
3237 | } | |
3238 | ||
3239 | if (rt->var_tmp_dir) { | |
3240 | log_debug("Spawning thread to nuke %s", rt->var_tmp_dir); | |
98b47d54 LP |
3241 | |
3242 | r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir); | |
3243 | if (r < 0) { | |
da927ba9 | 3244 | log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir); |
98b47d54 LP |
3245 | free(rt->var_tmp_dir); |
3246 | } | |
3247 | ||
613b411c LP |
3248 | rt->var_tmp_dir = NULL; |
3249 | } | |
3250 | ||
3d94f76c | 3251 | safe_close_pair(rt->netns_storage_socket); |
613b411c LP |
3252 | } |
3253 | ||
80876c20 LP |
3254 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
3255 | [EXEC_INPUT_NULL] = "null", | |
3256 | [EXEC_INPUT_TTY] = "tty", | |
3257 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
3258 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
3259 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
3260 | }; |
3261 | ||
8a0867d6 LP |
3262 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
3263 | ||
94f04347 | 3264 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 3265 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 3266 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 3267 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 3268 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 3269 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 3270 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 3271 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
3272 | [EXEC_OUTPUT_JOURNAL] = "journal", |
3273 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 3274 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
3275 | }; |
3276 | ||
3277 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); | |
023a4f67 LP |
3278 | |
3279 | static const char* const exec_utmp_mode_table[_EXEC_UTMP_MODE_MAX] = { | |
3280 | [EXEC_UTMP_INIT] = "init", | |
3281 | [EXEC_UTMP_LOGIN] = "login", | |
3282 | [EXEC_UTMP_USER] = "user", | |
3283 | }; | |
3284 | ||
3285 | DEFINE_STRING_TABLE_LOOKUP(exec_utmp_mode, ExecUtmpMode); |