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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
5cb5a6ff | 22 | #include <assert.h> |
034c6ed7 LP |
23 | #include <dirent.h> |
24 | #include <errno.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
44d8db9e | 27 | #include <string.h> |
309bff19 | 28 | #include <signal.h> |
071830ff LP |
29 | #include <sys/socket.h> |
30 | #include <sys/un.h> | |
94f04347 | 31 | #include <sys/prctl.h> |
66ee3769 | 32 | #include <linux/sched.h> |
451a074f LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
81a2b7ce LP |
35 | #include <grp.h> |
36 | #include <pwd.h> | |
15ae422b | 37 | #include <sys/mount.h> |
25e870b5 | 38 | #include <linux/fs.h> |
dd6c17b1 | 39 | #include <linux/oom.h> |
0a6f50c0 | 40 | #include <poll.h> |
2bef10ab | 41 | #include <glob.h> |
ac45f971 | 42 | #include <sys/personality.h> |
5cb5a6ff | 43 | |
5b6319dc LP |
44 | #ifdef HAVE_PAM |
45 | #include <security/pam_appl.h> | |
46 | #endif | |
47 | ||
7b52a628 MS |
48 | #ifdef HAVE_SELINUX |
49 | #include <selinux/selinux.h> | |
50 | #endif | |
51 | ||
17df7223 LP |
52 | #ifdef HAVE_SECCOMP |
53 | #include <seccomp.h> | |
54 | #endif | |
55 | ||
eef65bf3 MS |
56 | #ifdef HAVE_APPARMOR |
57 | #include <sys/apparmor.h> | |
58 | #endif | |
59 | ||
5cb5a6ff LP |
60 | #include "execute.h" |
61 | #include "strv.h" | |
62 | #include "macro.h" | |
d7832d2c | 63 | #include "capability.h" |
5cb5a6ff | 64 | #include "util.h" |
acbb0225 | 65 | #include "log.h" |
20ad4cfd | 66 | #include "sd-messages.h" |
9eba9da4 | 67 | #include "ioprio.h" |
94f04347 | 68 | #include "securebits.h" |
15ae422b | 69 | #include "namespace.h" |
d06dacd0 | 70 | #include "exit-status.h" |
dd6c17b1 | 71 | #include "missing.h" |
169c1bda | 72 | #include "utmp-wtmp.h" |
f6a6225e | 73 | #include "def.h" |
9eb977db | 74 | #include "path-util.h" |
4d1a6904 | 75 | #include "env-util.h" |
a5c32cff | 76 | #include "fileio.h" |
4ad49000 | 77 | #include "unit.h" |
f485606b | 78 | #include "async.h" |
0d3f7bb3 | 79 | #include "selinux-util.h" |
17df7223 | 80 | #include "errno-list.h" |
4298d0b5 | 81 | #include "af-list.h" |
e66cf1a3 | 82 | #include "mkdir.h" |
eef65bf3 | 83 | #include "apparmor-util.h" |
2ca620c4 | 84 | #include "smack-util.h" |
3c70e3bb | 85 | #include "bus-endpoint.h" |
16115b0a | 86 | #include "label.h" |
2822da4f | 87 | #include "cap-list.h" |
5cb5a6ff | 88 | |
57183d11 LP |
89 | #ifdef HAVE_SECCOMP |
90 | #include "seccomp-util.h" | |
91 | #endif | |
92 | ||
e056b01d | 93 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 94 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 95 | |
02a51aba LP |
96 | /* This assumes there is a 'tty' group */ |
97 | #define TTY_MODE 0620 | |
98 | ||
531dca78 LP |
99 | #define SNDBUF_SIZE (8*1024*1024) |
100 | ||
034c6ed7 LP |
101 | static int shift_fds(int fds[], unsigned n_fds) { |
102 | int start, restart_from; | |
103 | ||
104 | if (n_fds <= 0) | |
105 | return 0; | |
106 | ||
a0d40ac5 LP |
107 | /* Modifies the fds array! (sorts it) */ |
108 | ||
034c6ed7 LP |
109 | assert(fds); |
110 | ||
111 | start = 0; | |
112 | for (;;) { | |
113 | int i; | |
114 | ||
115 | restart_from = -1; | |
116 | ||
117 | for (i = start; i < (int) n_fds; i++) { | |
118 | int nfd; | |
119 | ||
120 | /* Already at right index? */ | |
121 | if (fds[i] == i+3) | |
122 | continue; | |
123 | ||
124 | if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0) | |
125 | return -errno; | |
126 | ||
03e334a1 | 127 | safe_close(fds[i]); |
034c6ed7 LP |
128 | fds[i] = nfd; |
129 | ||
130 | /* Hmm, the fd we wanted isn't free? Then | |
ee33e53a | 131 | * let's remember that and try again from here */ |
034c6ed7 LP |
132 | if (nfd != i+3 && restart_from < 0) |
133 | restart_from = i; | |
134 | } | |
135 | ||
136 | if (restart_from < 0) | |
137 | break; | |
138 | ||
139 | start = restart_from; | |
140 | } | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
c2748801 | 145 | static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) { |
47a71eed | 146 | unsigned i; |
e2c76839 | 147 | int r; |
47a71eed LP |
148 | |
149 | if (n_fds <= 0) | |
150 | return 0; | |
151 | ||
152 | assert(fds); | |
153 | ||
451a074f | 154 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */ |
47a71eed LP |
155 | |
156 | for (i = 0; i < n_fds; i++) { | |
47a71eed | 157 | |
e2c76839 LP |
158 | if ((r = fd_nonblock(fds[i], nonblock)) < 0) |
159 | return r; | |
47a71eed | 160 | |
451a074f LP |
161 | /* We unconditionally drop FD_CLOEXEC from the fds, |
162 | * since after all we want to pass these fds to our | |
163 | * children */ | |
47a71eed | 164 | |
e2c76839 LP |
165 | if ((r = fd_cloexec(fds[i], false)) < 0) |
166 | return r; | |
47a71eed LP |
167 | } |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
44a6b1b6 | 172 | _pure_ static const char *tty_path(const ExecContext *context) { |
80876c20 LP |
173 | assert(context); |
174 | ||
175 | if (context->tty_path) | |
176 | return context->tty_path; | |
177 | ||
178 | return "/dev/console"; | |
179 | } | |
180 | ||
9588bc32 | 181 | static void exec_context_tty_reset(const ExecContext *context) { |
6ea832a2 LP |
182 | assert(context); |
183 | ||
184 | if (context->tty_vhangup) | |
185 | terminal_vhangup(tty_path(context)); | |
186 | ||
187 | if (context->tty_reset) | |
188 | reset_terminal(tty_path(context)); | |
189 | ||
190 | if (context->tty_vt_disallocate && context->tty_path) | |
191 | vt_disallocate(context->tty_path); | |
192 | } | |
193 | ||
3a1286b6 MS |
194 | static bool is_terminal_output(ExecOutput o) { |
195 | return | |
196 | o == EXEC_OUTPUT_TTY || | |
197 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
198 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
199 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
200 | } | |
201 | ||
80876c20 LP |
202 | static int open_null_as(int flags, int nfd) { |
203 | int fd, r; | |
071830ff | 204 | |
80876c20 | 205 | assert(nfd >= 0); |
071830ff | 206 | |
613b411c LP |
207 | fd = open("/dev/null", flags|O_NOCTTY); |
208 | if (fd < 0) | |
071830ff LP |
209 | return -errno; |
210 | ||
80876c20 LP |
211 | if (fd != nfd) { |
212 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 213 | safe_close(fd); |
80876c20 LP |
214 | } else |
215 | r = nfd; | |
071830ff | 216 | |
80876c20 | 217 | return r; |
071830ff LP |
218 | } |
219 | ||
524daa8c | 220 | static int connect_journal_socket(int fd, uid_t uid, gid_t gid) { |
b92bea5d ZJS |
221 | union sockaddr_union sa = { |
222 | .un.sun_family = AF_UNIX, | |
223 | .un.sun_path = "/run/systemd/journal/stdout", | |
224 | }; | |
524daa8c ZJS |
225 | uid_t olduid = UID_INVALID; |
226 | gid_t oldgid = GID_INVALID; | |
227 | int r; | |
228 | ||
229 | if (gid != GID_INVALID) { | |
230 | oldgid = getgid(); | |
231 | ||
232 | r = setegid(gid); | |
233 | if (r < 0) | |
234 | return -errno; | |
235 | } | |
236 | ||
237 | if (uid != UID_INVALID) { | |
238 | olduid = getuid(); | |
239 | ||
240 | r = seteuid(uid); | |
241 | if (r < 0) { | |
242 | r = -errno; | |
243 | goto restore_gid; | |
244 | } | |
245 | } | |
246 | ||
247 | r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); | |
248 | if (r < 0) | |
249 | r = -errno; | |
250 | ||
251 | /* If we fail to restore the uid or gid, things will likely | |
252 | fail later on. This should only happen if an LSM interferes. */ | |
253 | ||
254 | if (uid != UID_INVALID) | |
255 | (void) seteuid(olduid); | |
256 | ||
257 | restore_gid: | |
258 | if (gid != GID_INVALID) | |
259 | (void) setegid(oldgid); | |
260 | ||
261 | return r; | |
262 | } | |
263 | ||
264 | static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, const char *unit_id, int nfd, uid_t uid, gid_t gid) { | |
265 | int fd, r; | |
071830ff LP |
266 | |
267 | assert(context); | |
80876c20 LP |
268 | assert(output < _EXEC_OUTPUT_MAX); |
269 | assert(ident); | |
270 | assert(nfd >= 0); | |
071830ff | 271 | |
54fe0cdb LP |
272 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
273 | if (fd < 0) | |
80876c20 | 274 | return -errno; |
071830ff | 275 | |
524daa8c ZJS |
276 | r = connect_journal_socket(fd, uid, gid); |
277 | if (r < 0) | |
278 | return r; | |
071830ff | 279 | |
80876c20 | 280 | if (shutdown(fd, SHUT_RD) < 0) { |
03e334a1 | 281 | safe_close(fd); |
80876c20 LP |
282 | return -errno; |
283 | } | |
071830ff | 284 | |
531dca78 LP |
285 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
286 | ||
80876c20 | 287 | dprintf(fd, |
62bca2c6 | 288 | "%s\n" |
80876c20 LP |
289 | "%s\n" |
290 | "%i\n" | |
54fe0cdb LP |
291 | "%i\n" |
292 | "%i\n" | |
293 | "%i\n" | |
4f4a1dbf | 294 | "%i\n", |
4f4a1dbf | 295 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 296 | unit_id, |
54fe0cdb LP |
297 | context->syslog_priority, |
298 | !!context->syslog_level_prefix, | |
299 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
300 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 301 | is_terminal_output(output)); |
80876c20 LP |
302 | |
303 | if (fd != nfd) { | |
304 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 305 | safe_close(fd); |
80876c20 LP |
306 | } else |
307 | r = nfd; | |
071830ff | 308 | |
80876c20 LP |
309 | return r; |
310 | } | |
311 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
312 | int fd, r; | |
071830ff | 313 | |
80876c20 LP |
314 | assert(path); |
315 | assert(nfd >= 0); | |
071830ff | 316 | |
80876c20 LP |
317 | if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0) |
318 | return fd; | |
071830ff | 319 | |
80876c20 LP |
320 | if (fd != nfd) { |
321 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 322 | safe_close(fd); |
80876c20 LP |
323 | } else |
324 | r = nfd; | |
071830ff | 325 | |
80876c20 LP |
326 | return r; |
327 | } | |
071830ff | 328 | |
80876c20 LP |
329 | static bool is_terminal_input(ExecInput i) { |
330 | return | |
331 | i == EXEC_INPUT_TTY || | |
332 | i == EXEC_INPUT_TTY_FORCE || | |
333 | i == EXEC_INPUT_TTY_FAIL; | |
334 | } | |
071830ff | 335 | |
1e3ad081 LP |
336 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
337 | ||
338 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
339 | return EXEC_INPUT_NULL; | |
071830ff | 340 | |
03fd9c49 | 341 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
342 | return EXEC_INPUT_NULL; |
343 | ||
03fd9c49 | 344 | return std_input; |
4f2d528d LP |
345 | } |
346 | ||
03fd9c49 | 347 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 348 | |
03fd9c49 | 349 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
350 | return EXEC_OUTPUT_INHERIT; |
351 | ||
03fd9c49 | 352 | return std_output; |
4f2d528d LP |
353 | } |
354 | ||
1e3ad081 | 355 | static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) { |
4f2d528d LP |
356 | ExecInput i; |
357 | ||
358 | assert(context); | |
359 | ||
1e3ad081 | 360 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
4f2d528d LP |
361 | |
362 | switch (i) { | |
071830ff | 363 | |
80876c20 LP |
364 | case EXEC_INPUT_NULL: |
365 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
366 | ||
367 | case EXEC_INPUT_TTY: | |
368 | case EXEC_INPUT_TTY_FORCE: | |
369 | case EXEC_INPUT_TTY_FAIL: { | |
370 | int fd, r; | |
071830ff | 371 | |
970edce6 ZJS |
372 | fd = acquire_terminal(tty_path(context), |
373 | i == EXEC_INPUT_TTY_FAIL, | |
374 | i == EXEC_INPUT_TTY_FORCE, | |
375 | false, | |
3a43da28 | 376 | USEC_INFINITY); |
970edce6 | 377 | if (fd < 0) |
80876c20 LP |
378 | return fd; |
379 | ||
380 | if (fd != STDIN_FILENO) { | |
381 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
03e334a1 | 382 | safe_close(fd); |
80876c20 LP |
383 | } else |
384 | r = STDIN_FILENO; | |
385 | ||
386 | return r; | |
387 | } | |
388 | ||
4f2d528d LP |
389 | case EXEC_INPUT_SOCKET: |
390 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
391 | ||
80876c20 LP |
392 | default: |
393 | assert_not_reached("Unknown input type"); | |
394 | } | |
395 | } | |
396 | ||
524daa8c | 397 | static int setup_output(const ExecContext *context, int fileno, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin, uid_t uid, gid_t gid) { |
4f2d528d LP |
398 | ExecOutput o; |
399 | ExecInput i; | |
47c1d80d | 400 | int r; |
4f2d528d | 401 | |
80876c20 LP |
402 | assert(context); |
403 | assert(ident); | |
404 | ||
1e3ad081 | 405 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
03fd9c49 | 406 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 407 | |
eb17e935 MS |
408 | if (fileno == STDERR_FILENO) { |
409 | ExecOutput e; | |
410 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 411 | |
eb17e935 MS |
412 | /* This expects the input and output are already set up */ |
413 | ||
414 | /* Don't change the stderr file descriptor if we inherit all | |
415 | * the way and are not on a tty */ | |
416 | if (e == EXEC_OUTPUT_INHERIT && | |
417 | o == EXEC_OUTPUT_INHERIT && | |
418 | i == EXEC_INPUT_NULL && | |
419 | !is_terminal_input(context->std_input) && | |
420 | getppid () != 1) | |
421 | return fileno; | |
422 | ||
423 | /* Duplicate from stdout if possible */ | |
424 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
425 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 426 | |
eb17e935 | 427 | o = e; |
80876c20 | 428 | |
eb17e935 | 429 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
430 | /* If input got downgraded, inherit the original value */ |
431 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
eb17e935 | 432 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 433 | |
acb591e4 | 434 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 435 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 436 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 437 | |
acb591e4 LP |
438 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
439 | if (getppid() != 1) | |
eb17e935 | 440 | return fileno; |
94f04347 | 441 | |
eb17e935 MS |
442 | /* We need to open /dev/null here anew, to get the right access mode. */ |
443 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 444 | } |
94f04347 | 445 | |
eb17e935 | 446 | switch (o) { |
80876c20 LP |
447 | |
448 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 449 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
450 | |
451 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 452 | if (is_terminal_input(i)) |
eb17e935 | 453 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
454 | |
455 | /* We don't reset the terminal if this is just about output */ | |
eb17e935 | 456 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
457 | |
458 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 459 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 460 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 461 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
462 | case EXEC_OUTPUT_JOURNAL: |
463 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
524daa8c | 464 | r = connect_logger_as(context, o, ident, unit_id, fileno, uid, gid); |
47c1d80d | 465 | if (r < 0) { |
e2cc6eca | 466 | log_unit_struct(unit_id, |
524daa8c | 467 | LOG_ERR, |
e2cc6eca LP |
468 | LOG_MESSAGE("Failed to connect %s of %s to the journal socket: %s", |
469 | fileno == STDOUT_FILENO ? "stdout" : "stderr", | |
470 | unit_id, strerror(-r)), | |
471 | LOG_ERRNO(-r), | |
472 | NULL); | |
eb17e935 | 473 | r = open_null_as(O_WRONLY, fileno); |
47c1d80d MS |
474 | } |
475 | return r; | |
4f2d528d LP |
476 | |
477 | case EXEC_OUTPUT_SOCKET: | |
478 | assert(socket_fd >= 0); | |
eb17e935 | 479 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
480 | |
481 | default: | |
80876c20 | 482 | assert_not_reached("Unknown error type"); |
94f04347 | 483 | } |
071830ff LP |
484 | } |
485 | ||
02a51aba LP |
486 | static int chown_terminal(int fd, uid_t uid) { |
487 | struct stat st; | |
488 | ||
489 | assert(fd >= 0); | |
02a51aba LP |
490 | |
491 | /* This might fail. What matters are the results. */ | |
bab45044 LP |
492 | (void) fchown(fd, uid, -1); |
493 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
494 | |
495 | if (fstat(fd, &st) < 0) | |
496 | return -errno; | |
497 | ||
d8b4e2e9 | 498 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
499 | return -EPERM; |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
af6da548 | 504 | static int setup_confirm_stdio(int *_saved_stdin, |
80876c20 LP |
505 | int *_saved_stdout) { |
506 | int fd = -1, saved_stdin, saved_stdout = -1, r; | |
507 | ||
80876c20 LP |
508 | assert(_saved_stdin); |
509 | assert(_saved_stdout); | |
510 | ||
af6da548 LP |
511 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
512 | if (saved_stdin < 0) | |
513 | return -errno; | |
80876c20 | 514 | |
af6da548 LP |
515 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
516 | if (saved_stdout < 0) { | |
517 | r = errno; | |
80876c20 LP |
518 | goto fail; |
519 | } | |
520 | ||
af6da548 LP |
521 | fd = acquire_terminal( |
522 | "/dev/console", | |
523 | false, | |
524 | false, | |
525 | false, | |
526 | DEFAULT_CONFIRM_USEC); | |
527 | if (fd < 0) { | |
528 | r = fd; | |
80876c20 LP |
529 | goto fail; |
530 | } | |
531 | ||
af6da548 LP |
532 | r = chown_terminal(fd, getuid()); |
533 | if (r < 0) | |
02a51aba | 534 | goto fail; |
02a51aba | 535 | |
80876c20 | 536 | if (dup2(fd, STDIN_FILENO) < 0) { |
af6da548 | 537 | r = -errno; |
80876c20 LP |
538 | goto fail; |
539 | } | |
540 | ||
541 | if (dup2(fd, STDOUT_FILENO) < 0) { | |
af6da548 | 542 | r = -errno; |
80876c20 LP |
543 | goto fail; |
544 | } | |
545 | ||
546 | if (fd >= 2) | |
03e334a1 | 547 | safe_close(fd); |
80876c20 LP |
548 | |
549 | *_saved_stdin = saved_stdin; | |
550 | *_saved_stdout = saved_stdout; | |
551 | ||
552 | return 0; | |
553 | ||
554 | fail: | |
03e334a1 LP |
555 | safe_close(saved_stdout); |
556 | safe_close(saved_stdin); | |
557 | safe_close(fd); | |
80876c20 LP |
558 | |
559 | return r; | |
560 | } | |
561 | ||
44b601bc | 562 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
03e334a1 | 563 | _cleanup_close_ int fd = -1; |
af6da548 | 564 | va_list ap; |
80876c20 | 565 | |
af6da548 | 566 | assert(format); |
80876c20 | 567 | |
af6da548 LP |
568 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
569 | if (fd < 0) | |
570 | return fd; | |
80876c20 | 571 | |
af6da548 LP |
572 | va_start(ap, format); |
573 | vdprintf(fd, format, ap); | |
574 | va_end(ap); | |
80876c20 | 575 | |
af6da548 LP |
576 | return 0; |
577 | } | |
80876c20 | 578 | |
af6da548 LP |
579 | static int restore_confirm_stdio(int *saved_stdin, |
580 | int *saved_stdout) { | |
80876c20 | 581 | |
af6da548 | 582 | int r = 0; |
80876c20 | 583 | |
af6da548 LP |
584 | assert(saved_stdin); |
585 | assert(saved_stdout); | |
586 | ||
587 | release_terminal(); | |
588 | ||
589 | if (*saved_stdin >= 0) | |
80876c20 | 590 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 591 | r = -errno; |
80876c20 | 592 | |
af6da548 | 593 | if (*saved_stdout >= 0) |
80876c20 | 594 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 595 | r = -errno; |
80876c20 | 596 | |
03e334a1 LP |
597 | safe_close(*saved_stdin); |
598 | safe_close(*saved_stdout); | |
af6da548 LP |
599 | |
600 | return r; | |
601 | } | |
602 | ||
603 | static int ask_for_confirmation(char *response, char **argv) { | |
604 | int saved_stdout = -1, saved_stdin = -1, r; | |
e1d75803 | 605 | _cleanup_free_ char *line = NULL; |
af6da548 LP |
606 | |
607 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
608 | if (r < 0) | |
609 | return r; | |
610 | ||
611 | line = exec_command_line(argv); | |
612 | if (!line) | |
613 | return -ENOMEM; | |
614 | ||
418b9be5 | 615 | r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line); |
af6da548 LP |
616 | |
617 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
618 | ||
619 | return r; | |
80876c20 LP |
620 | } |
621 | ||
81a2b7ce LP |
622 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
623 | bool keep_groups = false; | |
624 | int r; | |
625 | ||
626 | assert(context); | |
627 | ||
35b8ca3a | 628 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
629 | * we avoid NSS lookups for gid=0. */ |
630 | ||
631 | if (context->group || username) { | |
632 | ||
4b67834e LP |
633 | if (context->group) { |
634 | const char *g = context->group; | |
635 | ||
636 | if ((r = get_group_creds(&g, &gid)) < 0) | |
81a2b7ce | 637 | return r; |
4b67834e | 638 | } |
81a2b7ce LP |
639 | |
640 | /* First step, initialize groups from /etc/groups */ | |
641 | if (username && gid != 0) { | |
642 | if (initgroups(username, gid) < 0) | |
643 | return -errno; | |
644 | ||
645 | keep_groups = true; | |
646 | } | |
647 | ||
648 | /* Second step, set our gids */ | |
649 | if (setresgid(gid, gid, gid) < 0) | |
650 | return -errno; | |
651 | } | |
652 | ||
653 | if (context->supplementary_groups) { | |
654 | int ngroups_max, k; | |
655 | gid_t *gids; | |
656 | char **i; | |
657 | ||
658 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 659 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
660 | |
661 | if (!(gids = new(gid_t, ngroups_max))) | |
662 | return -ENOMEM; | |
663 | ||
664 | if (keep_groups) { | |
665 | if ((k = getgroups(ngroups_max, gids)) < 0) { | |
666 | free(gids); | |
667 | return -errno; | |
668 | } | |
669 | } else | |
670 | k = 0; | |
671 | ||
672 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 673 | const char *g; |
81a2b7ce LP |
674 | |
675 | if (k >= ngroups_max) { | |
676 | free(gids); | |
677 | return -E2BIG; | |
678 | } | |
679 | ||
4b67834e LP |
680 | g = *i; |
681 | r = get_group_creds(&g, gids+k); | |
682 | if (r < 0) { | |
81a2b7ce LP |
683 | free(gids); |
684 | return r; | |
685 | } | |
686 | ||
687 | k++; | |
688 | } | |
689 | ||
690 | if (setgroups(k, gids) < 0) { | |
691 | free(gids); | |
692 | return -errno; | |
693 | } | |
694 | ||
695 | free(gids); | |
696 | } | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
81a2b7ce LP |
702 | assert(context); |
703 | ||
704 | /* Sets (but doesn't lookup) the uid and make sure we keep the | |
705 | * capabilities while doing so. */ | |
706 | ||
707 | if (context->capabilities) { | |
5ce70e5b | 708 | _cleanup_cap_free_ cap_t d = NULL; |
81a2b7ce LP |
709 | static const cap_value_t bits[] = { |
710 | CAP_SETUID, /* Necessary so that we can run setresuid() below */ | |
711 | CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */ | |
712 | }; | |
713 | ||
714 | /* First step: If we need to keep capabilities but | |
715 | * drop privileges we need to make sure we keep our | |
cbb21cca | 716 | * caps, while we drop privileges. */ |
693ced48 | 717 | if (uid != 0) { |
cbb21cca | 718 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
719 | |
720 | if (prctl(PR_GET_SECUREBITS) != sb) | |
721 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
722 | return -errno; | |
723 | } | |
81a2b7ce | 724 | |
35b8ca3a | 725 | /* Second step: set the capabilities. This will reduce |
81a2b7ce LP |
726 | * the capabilities to the minimum we need. */ |
727 | ||
5ce70e5b ZJS |
728 | d = cap_dup(context->capabilities); |
729 | if (!d) | |
81a2b7ce LP |
730 | return -errno; |
731 | ||
732 | if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 || | |
5ce70e5b ZJS |
733 | cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) |
734 | return -errno; | |
81a2b7ce | 735 | |
5ce70e5b ZJS |
736 | if (cap_set_proc(d) < 0) |
737 | return -errno; | |
81a2b7ce LP |
738 | } |
739 | ||
740 | /* Third step: actually set the uids */ | |
741 | if (setresuid(uid, uid, uid) < 0) | |
742 | return -errno; | |
743 | ||
744 | /* At this point we should have all necessary capabilities but | |
745 | are otherwise a normal user. However, the caps might got | |
746 | corrupted due to the setresuid() so we need clean them up | |
747 | later. This is done outside of this call. */ | |
748 | ||
749 | return 0; | |
750 | } | |
751 | ||
5b6319dc LP |
752 | #ifdef HAVE_PAM |
753 | ||
754 | static int null_conv( | |
755 | int num_msg, | |
756 | const struct pam_message **msg, | |
757 | struct pam_response **resp, | |
758 | void *appdata_ptr) { | |
759 | ||
760 | /* We don't support conversations */ | |
761 | ||
762 | return PAM_CONV_ERR; | |
763 | } | |
764 | ||
765 | static int setup_pam( | |
766 | const char *name, | |
767 | const char *user, | |
940c5210 | 768 | uid_t uid, |
5b6319dc LP |
769 | const char *tty, |
770 | char ***pam_env, | |
771 | int fds[], unsigned n_fds) { | |
772 | ||
773 | static const struct pam_conv conv = { | |
774 | .conv = null_conv, | |
775 | .appdata_ptr = NULL | |
776 | }; | |
777 | ||
778 | pam_handle_t *handle = NULL; | |
779 | sigset_t ss, old_ss; | |
780 | int pam_code = PAM_SUCCESS; | |
9ba35398 | 781 | int err; |
5b6319dc LP |
782 | char **e = NULL; |
783 | bool close_session = false; | |
784 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 785 | int flags = 0; |
5b6319dc LP |
786 | |
787 | assert(name); | |
788 | assert(user); | |
789 | assert(pam_env); | |
790 | ||
791 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 792 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
793 | * systemd via the cgroup logic. It will then remove the PAM |
794 | * session again. The parent process will exec() the actual | |
795 | * daemon. We do things this way to ensure that the main PID | |
796 | * of the daemon is the one we initially fork()ed. */ | |
797 | ||
553d2243 | 798 | if (log_get_max_level() < LOG_DEBUG) |
970edce6 ZJS |
799 | flags |= PAM_SILENT; |
800 | ||
f546241b ZJS |
801 | pam_code = pam_start(name, user, &conv, &handle); |
802 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
803 | handle = NULL; |
804 | goto fail; | |
805 | } | |
806 | ||
f546241b ZJS |
807 | if (tty) { |
808 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
809 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 810 | goto fail; |
f546241b | 811 | } |
5b6319dc | 812 | |
970edce6 | 813 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 814 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
815 | goto fail; |
816 | ||
970edce6 | 817 | pam_code = pam_open_session(handle, flags); |
f546241b | 818 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
819 | goto fail; |
820 | ||
821 | close_session = true; | |
822 | ||
f546241b ZJS |
823 | e = pam_getenvlist(handle); |
824 | if (!e) { | |
5b6319dc LP |
825 | pam_code = PAM_BUF_ERR; |
826 | goto fail; | |
827 | } | |
828 | ||
829 | /* Block SIGTERM, so that we know that it won't get lost in | |
830 | * the child */ | |
831 | if (sigemptyset(&ss) < 0 || | |
832 | sigaddset(&ss, SIGTERM) < 0 || | |
833 | sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0) | |
834 | goto fail; | |
835 | ||
836 | parent_pid = getpid(); | |
837 | ||
f546241b ZJS |
838 | pam_pid = fork(); |
839 | if (pam_pid < 0) | |
5b6319dc LP |
840 | goto fail; |
841 | ||
842 | if (pam_pid == 0) { | |
843 | int sig; | |
844 | int r = EXIT_PAM; | |
845 | ||
846 | /* The child's job is to reset the PAM session on | |
847 | * termination */ | |
848 | ||
849 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
850 | * of "/sbin/init"), to look pretty in /bin/ps */ |
851 | rename_process("(sd-pam)"); | |
5b6319dc LP |
852 | |
853 | /* Make sure we don't keep open the passed fds in this | |
854 | child. We assume that otherwise only those fds are | |
855 | open here that have been opened by PAM. */ | |
856 | close_many(fds, n_fds); | |
857 | ||
940c5210 AK |
858 | /* Drop privileges - we don't need any to pam_close_session |
859 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
860 | * If this fails, ignore the error - but expect sd-pam threads | |
861 | * to fail to exit normally */ | |
862 | if (setresuid(uid, uid, uid) < 0) | |
da927ba9 | 863 | log_error_errno(r, "Error: Failed to setresuid() in sd-pam: %m"); |
940c5210 AK |
864 | |
865 | /* Wait until our parent died. This will only work if | |
866 | * the above setresuid() succeeds, otherwise the kernel | |
867 | * will not allow unprivileged parents kill their privileged | |
868 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
869 | * to do the rest for us. */ |
870 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
871 | goto child_finish; | |
872 | ||
873 | /* Check if our parent process might already have | |
874 | * died? */ | |
875 | if (getppid() == parent_pid) { | |
3dead8d9 LP |
876 | for (;;) { |
877 | if (sigwait(&ss, &sig) < 0) { | |
878 | if (errno == EINTR) | |
879 | continue; | |
880 | ||
881 | goto child_finish; | |
882 | } | |
5b6319dc | 883 | |
3dead8d9 LP |
884 | assert(sig == SIGTERM); |
885 | break; | |
886 | } | |
5b6319dc LP |
887 | } |
888 | ||
3dead8d9 | 889 | /* If our parent died we'll end the session */ |
f546241b | 890 | if (getppid() != parent_pid) { |
970edce6 | 891 | pam_code = pam_close_session(handle, flags); |
f546241b | 892 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 893 | goto child_finish; |
f546241b | 894 | } |
5b6319dc LP |
895 | |
896 | r = 0; | |
897 | ||
898 | child_finish: | |
970edce6 | 899 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
900 | _exit(r); |
901 | } | |
902 | ||
903 | /* If the child was forked off successfully it will do all the | |
904 | * cleanups, so forget about the handle here. */ | |
905 | handle = NULL; | |
906 | ||
3b8bddde | 907 | /* Unblock SIGTERM again in the parent */ |
5b6319dc LP |
908 | if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0) |
909 | goto fail; | |
910 | ||
911 | /* We close the log explicitly here, since the PAM modules | |
912 | * might have opened it, but we don't want this fd around. */ | |
913 | closelog(); | |
914 | ||
aa87e624 LP |
915 | *pam_env = e; |
916 | e = NULL; | |
917 | ||
5b6319dc LP |
918 | return 0; |
919 | ||
920 | fail: | |
970edce6 ZJS |
921 | if (pam_code != PAM_SUCCESS) { |
922 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
9ba35398 | 923 | err = -EPERM; /* PAM errors do not map to errno */ |
970edce6 | 924 | } else { |
56f64d95 | 925 | log_error_errno(errno, "PAM failed: %m"); |
9ba35398 | 926 | err = -errno; |
970edce6 | 927 | } |
9ba35398 | 928 | |
5b6319dc LP |
929 | if (handle) { |
930 | if (close_session) | |
970edce6 | 931 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 932 | |
970edce6 | 933 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
934 | } |
935 | ||
936 | strv_free(e); | |
937 | ||
938 | closelog(); | |
939 | ||
430c18ed | 940 | if (pam_pid > 1) { |
5b6319dc | 941 | kill(pam_pid, SIGTERM); |
430c18ed LP |
942 | kill(pam_pid, SIGCONT); |
943 | } | |
5b6319dc | 944 | |
9ba35398 | 945 | return err; |
5b6319dc LP |
946 | } |
947 | #endif | |
948 | ||
5d6b1584 LP |
949 | static void rename_process_from_path(const char *path) { |
950 | char process_name[11]; | |
951 | const char *p; | |
952 | size_t l; | |
953 | ||
954 | /* This resulting string must fit in 10 chars (i.e. the length | |
955 | * of "/sbin/init") to look pretty in /bin/ps */ | |
956 | ||
2b6bf07d | 957 | p = basename(path); |
5d6b1584 LP |
958 | if (isempty(p)) { |
959 | rename_process("(...)"); | |
960 | return; | |
961 | } | |
962 | ||
963 | l = strlen(p); | |
964 | if (l > 8) { | |
965 | /* The end of the process name is usually more | |
966 | * interesting, since the first bit might just be | |
967 | * "systemd-" */ | |
968 | p = p + l - 8; | |
969 | l = 8; | |
970 | } | |
971 | ||
972 | process_name[0] = '('; | |
973 | memcpy(process_name+1, p, l); | |
974 | process_name[1+l] = ')'; | |
975 | process_name[1+l+1] = 0; | |
976 | ||
977 | rename_process(process_name); | |
978 | } | |
979 | ||
c0467cf3 | 980 | #ifdef HAVE_SECCOMP |
17df7223 | 981 | |
822a5960 | 982 | static int apply_seccomp(const ExecContext *c) { |
17df7223 LP |
983 | uint32_t negative_action, action; |
984 | scmp_filter_ctx *seccomp; | |
c0467cf3 RC |
985 | Iterator i; |
986 | void *id; | |
17df7223 | 987 | int r; |
8351ceae | 988 | |
c0467cf3 | 989 | assert(c); |
8351ceae | 990 | |
17df7223 LP |
991 | negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); |
992 | ||
993 | seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); | |
994 | if (!seccomp) | |
995 | return -ENOMEM; | |
8351ceae | 996 | |
e9642be2 LP |
997 | if (c->syscall_archs) { |
998 | ||
999 | SET_FOREACH(id, c->syscall_archs, i) { | |
1000 | r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); | |
1001 | if (r == -EEXIST) | |
1002 | continue; | |
7c66bae2 LP |
1003 | if (r < 0) |
1004 | goto finish; | |
e9642be2 | 1005 | } |
e9642be2 | 1006 | |
7c66bae2 | 1007 | } else { |
e9642be2 | 1008 | r = seccomp_add_secondary_archs(seccomp); |
7c66bae2 LP |
1009 | if (r < 0) |
1010 | goto finish; | |
57183d11 | 1011 | } |
8351ceae | 1012 | |
57183d11 | 1013 | action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action; |
17df7223 LP |
1014 | SET_FOREACH(id, c->syscall_filter, i) { |
1015 | r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0); | |
7c66bae2 LP |
1016 | if (r < 0) |
1017 | goto finish; | |
c0467cf3 | 1018 | } |
8351ceae | 1019 | |
7c66bae2 LP |
1020 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); |
1021 | if (r < 0) | |
1022 | goto finish; | |
1023 | ||
17df7223 | 1024 | r = seccomp_load(seccomp); |
7c66bae2 LP |
1025 | |
1026 | finish: | |
17df7223 | 1027 | seccomp_release(seccomp); |
4298d0b5 LP |
1028 | return r; |
1029 | } | |
1030 | ||
822a5960 | 1031 | static int apply_address_families(const ExecContext *c) { |
4298d0b5 LP |
1032 | scmp_filter_ctx *seccomp; |
1033 | Iterator i; | |
1034 | int r; | |
1035 | ||
1036 | assert(c); | |
1037 | ||
1038 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1039 | if (!seccomp) | |
1040 | return -ENOMEM; | |
1041 | ||
1042 | r = seccomp_add_secondary_archs(seccomp); | |
1043 | if (r < 0) | |
1044 | goto finish; | |
1045 | ||
1046 | if (c->address_families_whitelist) { | |
1047 | int af, first = 0, last = 0; | |
1048 | void *afp; | |
1049 | ||
1050 | /* If this is a whitelist, we first block the address | |
1051 | * families that are out of range and then everything | |
1052 | * that is not in the set. First, we find the lowest | |
1053 | * and highest address family in the set. */ | |
1054 | ||
1055 | SET_FOREACH(afp, c->address_families, i) { | |
1056 | af = PTR_TO_INT(afp); | |
17df7223 | 1057 | |
4298d0b5 LP |
1058 | if (af <= 0 || af >= af_max()) |
1059 | continue; | |
1060 | ||
1061 | if (first == 0 || af < first) | |
1062 | first = af; | |
1063 | ||
1064 | if (last == 0 || af > last) | |
1065 | last = af; | |
1066 | } | |
1067 | ||
1068 | assert((first == 0) == (last == 0)); | |
1069 | ||
1070 | if (first == 0) { | |
1071 | ||
1072 | /* No entries in the valid range, block everything */ | |
1073 | r = seccomp_rule_add( | |
1074 | seccomp, | |
1075 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1076 | SCMP_SYS(socket), | |
1077 | 0); | |
1078 | if (r < 0) | |
1079 | goto finish; | |
1080 | ||
1081 | } else { | |
1082 | ||
1083 | /* Block everything below the first entry */ | |
1084 | r = seccomp_rule_add( | |
1085 | seccomp, | |
1086 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1087 | SCMP_SYS(socket), | |
1088 | 1, | |
1089 | SCMP_A0(SCMP_CMP_LT, first)); | |
1090 | if (r < 0) | |
1091 | goto finish; | |
1092 | ||
1093 | /* Block everything above the last entry */ | |
1094 | r = seccomp_rule_add( | |
1095 | seccomp, | |
1096 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1097 | SCMP_SYS(socket), | |
1098 | 1, | |
1099 | SCMP_A0(SCMP_CMP_GT, last)); | |
1100 | if (r < 0) | |
1101 | goto finish; | |
1102 | ||
1103 | /* Block everything between the first and last | |
1104 | * entry */ | |
1105 | for (af = 1; af < af_max(); af++) { | |
1106 | ||
1107 | if (set_contains(c->address_families, INT_TO_PTR(af))) | |
1108 | continue; | |
1109 | ||
1110 | r = seccomp_rule_add( | |
1111 | seccomp, | |
1112 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1113 | SCMP_SYS(socket), | |
1114 | 1, | |
1115 | SCMP_A0(SCMP_CMP_EQ, af)); | |
1116 | if (r < 0) | |
1117 | goto finish; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | } else { | |
1122 | void *af; | |
1123 | ||
1124 | /* If this is a blacklist, then generate one rule for | |
1125 | * each address family that are then combined in OR | |
1126 | * checks. */ | |
1127 | ||
1128 | SET_FOREACH(af, c->address_families, i) { | |
1129 | ||
1130 | r = seccomp_rule_add( | |
1131 | seccomp, | |
1132 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1133 | SCMP_SYS(socket), | |
1134 | 1, | |
1135 | SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af))); | |
1136 | if (r < 0) | |
1137 | goto finish; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1142 | if (r < 0) | |
1143 | goto finish; | |
1144 | ||
1145 | r = seccomp_load(seccomp); | |
1146 | ||
1147 | finish: | |
1148 | seccomp_release(seccomp); | |
17df7223 | 1149 | return r; |
8351ceae | 1150 | } |
4298d0b5 | 1151 | |
c0467cf3 | 1152 | #endif |
8351ceae | 1153 | |
31a7eb86 ZJS |
1154 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
1155 | assert(idle_pipe); | |
1156 | ||
03e334a1 LP |
1157 | |
1158 | safe_close(idle_pipe[1]); | |
1159 | safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1160 | |
1161 | if (idle_pipe[0] >= 0) { | |
1162 | int r; | |
1163 | ||
1164 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1165 | ||
1166 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
1167 | /* Signal systemd that we are bored and want to continue. */ | |
1168 | write(idle_pipe[3], "x", 1); | |
1169 | ||
1170 | /* Wait for systemd to react to the signal above. */ | |
1171 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
1172 | } | |
1173 | ||
03e334a1 | 1174 | safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1175 | |
1176 | } | |
1177 | ||
03e334a1 | 1178 | safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1179 | } |
1180 | ||
7cae38c4 | 1181 | static int build_environment( |
9fa95f85 | 1182 | const ExecContext *c, |
7cae38c4 | 1183 | unsigned n_fds, |
09812eb7 | 1184 | usec_t watchdog_usec, |
7cae38c4 LP |
1185 | const char *home, |
1186 | const char *username, | |
1187 | const char *shell, | |
1188 | char ***ret) { | |
1189 | ||
1190 | _cleanup_strv_free_ char **our_env = NULL; | |
1191 | unsigned n_env = 0; | |
1192 | char *x; | |
1193 | ||
1194 | assert(c); | |
1195 | assert(ret); | |
1196 | ||
09812eb7 | 1197 | our_env = new0(char*, 10); |
7cae38c4 LP |
1198 | if (!our_env) |
1199 | return -ENOMEM; | |
1200 | ||
1201 | if (n_fds > 0) { | |
ccd06097 | 1202 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0) |
7cae38c4 LP |
1203 | return -ENOMEM; |
1204 | our_env[n_env++] = x; | |
1205 | ||
1206 | if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0) | |
1207 | return -ENOMEM; | |
1208 | our_env[n_env++] = x; | |
1209 | } | |
1210 | ||
09812eb7 | 1211 | if (watchdog_usec > 0) { |
ccd06097 | 1212 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0) |
09812eb7 LP |
1213 | return -ENOMEM; |
1214 | our_env[n_env++] = x; | |
1215 | ||
de0671ee | 1216 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, watchdog_usec) < 0) |
09812eb7 LP |
1217 | return -ENOMEM; |
1218 | our_env[n_env++] = x; | |
1219 | } | |
1220 | ||
7cae38c4 LP |
1221 | if (home) { |
1222 | x = strappend("HOME=", home); | |
1223 | if (!x) | |
1224 | return -ENOMEM; | |
1225 | our_env[n_env++] = x; | |
1226 | } | |
1227 | ||
1228 | if (username) { | |
1229 | x = strappend("LOGNAME=", username); | |
1230 | if (!x) | |
1231 | return -ENOMEM; | |
1232 | our_env[n_env++] = x; | |
1233 | ||
1234 | x = strappend("USER=", username); | |
1235 | if (!x) | |
1236 | return -ENOMEM; | |
1237 | our_env[n_env++] = x; | |
1238 | } | |
1239 | ||
1240 | if (shell) { | |
1241 | x = strappend("SHELL=", shell); | |
1242 | if (!x) | |
1243 | return -ENOMEM; | |
1244 | our_env[n_env++] = x; | |
1245 | } | |
1246 | ||
1247 | if (is_terminal_input(c->std_input) || | |
1248 | c->std_output == EXEC_OUTPUT_TTY || | |
1249 | c->std_error == EXEC_OUTPUT_TTY || | |
1250 | c->tty_path) { | |
1251 | ||
1252 | x = strdup(default_term_for_tty(tty_path(c))); | |
1253 | if (!x) | |
1254 | return -ENOMEM; | |
1255 | our_env[n_env++] = x; | |
1256 | } | |
1257 | ||
1258 | our_env[n_env++] = NULL; | |
09812eb7 | 1259 | assert(n_env <= 10); |
7cae38c4 LP |
1260 | |
1261 | *ret = our_env; | |
1262 | our_env = NULL; | |
1263 | ||
1264 | return 0; | |
1265 | } | |
1266 | ||
ff0af2a1 LP |
1267 | static int exec_child( |
1268 | ExecCommand *command, | |
1269 | const ExecContext *context, | |
1270 | const ExecParameters *params, | |
1271 | ExecRuntime *runtime, | |
1272 | char **argv, | |
1273 | int socket_fd, | |
1274 | int *fds, unsigned n_fds, | |
1275 | char **files_env, | |
1276 | int *exit_status) { | |
d35fbf6b DM |
1277 | |
1278 | _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL; | |
9008e1ac | 1279 | _cleanup_free_ char *mac_selinux_context_net = NULL; |
d35fbf6b DM |
1280 | const char *username = NULL, *home = NULL, *shell = NULL; |
1281 | unsigned n_dont_close = 0; | |
e44da745 | 1282 | int dont_close[n_fds + 4]; |
fed1e721 LP |
1283 | uid_t uid = UID_INVALID; |
1284 | gid_t gid = GID_INVALID; | |
ff0af2a1 | 1285 | int i, r; |
034c6ed7 | 1286 | |
5cb5a6ff LP |
1287 | assert(command); |
1288 | assert(context); | |
d35fbf6b | 1289 | assert(params); |
ff0af2a1 | 1290 | assert(exit_status); |
d35fbf6b DM |
1291 | |
1292 | rename_process_from_path(command->path); | |
1293 | ||
1294 | /* We reset exactly these signals, since they are the | |
1295 | * only ones we set to SIG_IGN in the main daemon. All | |
1296 | * others we leave untouched because we set them to | |
1297 | * SIG_DFL or a valid handler initially, both of which | |
1298 | * will be demoted to SIG_DFL. */ | |
1299 | default_signals(SIGNALS_CRASH_HANDLER, | |
1300 | SIGNALS_IGNORE, -1); | |
1301 | ||
1302 | if (context->ignore_sigpipe) | |
1303 | ignore_signals(SIGPIPE, -1); | |
1304 | ||
ff0af2a1 LP |
1305 | r = reset_signal_mask(); |
1306 | if (r < 0) { | |
1307 | *exit_status = EXIT_SIGNAL_MASK; | |
1308 | return r; | |
d35fbf6b | 1309 | } |
034c6ed7 | 1310 | |
d35fbf6b DM |
1311 | if (params->idle_pipe) |
1312 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 1313 | |
d35fbf6b DM |
1314 | /* Close sockets very early to make sure we don't |
1315 | * block init reexecution because it cannot bind its | |
1316 | * sockets */ | |
ff0af2a1 | 1317 | |
d35fbf6b | 1318 | log_forget_fds(); |
4f2d528d | 1319 | |
d35fbf6b DM |
1320 | if (socket_fd >= 0) |
1321 | dont_close[n_dont_close++] = socket_fd; | |
1322 | if (n_fds > 0) { | |
1323 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
1324 | n_dont_close += n_fds; | |
1325 | } | |
e44da745 DM |
1326 | if (params->bus_endpoint_fd >= 0) |
1327 | dont_close[n_dont_close++] = params->bus_endpoint_fd; | |
d35fbf6b DM |
1328 | if (runtime) { |
1329 | if (runtime->netns_storage_socket[0] >= 0) | |
1330 | dont_close[n_dont_close++] = runtime->netns_storage_socket[0]; | |
1331 | if (runtime->netns_storage_socket[1] >= 0) | |
1332 | dont_close[n_dont_close++] = runtime->netns_storage_socket[1]; | |
9fa95f85 | 1333 | } |
4f2d528d | 1334 | |
ff0af2a1 LP |
1335 | r = close_all_fds(dont_close, n_dont_close); |
1336 | if (r < 0) { | |
1337 | *exit_status = EXIT_FDS; | |
1338 | return r; | |
8c7be95e LP |
1339 | } |
1340 | ||
d35fbf6b DM |
1341 | if (!context->same_pgrp) |
1342 | if (setsid() < 0) { | |
ff0af2a1 | 1343 | *exit_status = EXIT_SETSID; |
d35fbf6b DM |
1344 | return -errno; |
1345 | } | |
9e2f7c11 | 1346 | |
d35fbf6b DM |
1347 | exec_context_tty_reset(context); |
1348 | ||
1349 | if (params->confirm_spawn) { | |
1350 | char response; | |
1351 | ||
ff0af2a1 LP |
1352 | r = ask_for_confirmation(&response, argv); |
1353 | if (r == -ETIMEDOUT) | |
d35fbf6b | 1354 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); |
ff0af2a1 LP |
1355 | else if (r < 0) |
1356 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-r)); | |
d35fbf6b DM |
1357 | else if (response == 's') { |
1358 | write_confirm_message("Skipping execution.\n"); | |
ff0af2a1 | 1359 | *exit_status = EXIT_CONFIRM; |
d35fbf6b DM |
1360 | return -ECANCELED; |
1361 | } else if (response == 'n') { | |
1362 | write_confirm_message("Failing execution.\n"); | |
ff0af2a1 | 1363 | *exit_status = 0; |
d35fbf6b DM |
1364 | return 0; |
1365 | } | |
1366 | } | |
1a63a750 | 1367 | |
524daa8c ZJS |
1368 | if (context->user) { |
1369 | username = context->user; | |
ff0af2a1 LP |
1370 | r = get_user_creds(&username, &uid, &gid, &home, &shell); |
1371 | if (r < 0) { | |
1372 | *exit_status = EXIT_USER; | |
1373 | return r; | |
524daa8c ZJS |
1374 | } |
1375 | } | |
1376 | ||
d35fbf6b DM |
1377 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1378 | * must sure to drop O_NONBLOCK */ | |
1379 | if (socket_fd >= 0) | |
1380 | fd_nonblock(socket_fd, false); | |
acbb0225 | 1381 | |
ff0af2a1 LP |
1382 | r = setup_input(context, socket_fd, params->apply_tty_stdin); |
1383 | if (r < 0) { | |
1384 | *exit_status = EXIT_STDIN; | |
1385 | return r; | |
d35fbf6b | 1386 | } |
034c6ed7 | 1387 | |
ff0af2a1 LP |
1388 | r = setup_output(context, STDOUT_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin, uid, gid); |
1389 | if (r < 0) { | |
1390 | *exit_status = EXIT_STDOUT; | |
1391 | return r; | |
d35fbf6b DM |
1392 | } |
1393 | ||
ff0af2a1 LP |
1394 | r = setup_output(context, STDERR_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin, uid, gid); |
1395 | if (r < 0) { | |
1396 | *exit_status = EXIT_STDERR; | |
1397 | return r; | |
d35fbf6b DM |
1398 | } |
1399 | ||
1400 | if (params->cgroup_path) { | |
ff0af2a1 LP |
1401 | r = cg_attach_everywhere(params->cgroup_supported, params->cgroup_path, 0, NULL, NULL); |
1402 | if (r < 0) { | |
1403 | *exit_status = EXIT_CGROUP; | |
1404 | return r; | |
309bff19 | 1405 | } |
d35fbf6b | 1406 | } |
309bff19 | 1407 | |
d35fbf6b | 1408 | if (context->oom_score_adjust_set) { |
d5243d62 | 1409 | char t[DECIMAL_STR_MAX(context->oom_score_adjust)]; |
f2b68789 | 1410 | |
d5243d62 LP |
1411 | /* When we can't make this change due to EPERM, then |
1412 | * let's silently skip over it. User namespaces | |
1413 | * prohibit write access to this file, and we | |
1414 | * shouldn't trip up over that. */ | |
613b411c | 1415 | |
d5243d62 | 1416 | sprintf(t, "%i", context->oom_score_adjust); |
ff0af2a1 | 1417 | r = write_string_file("/proc/self/oom_score_adj", t); |
6cb7fa17 | 1418 | if (r == -EPERM || r == -EACCES) { |
ff0af2a1 LP |
1419 | log_open(); |
1420 | log_unit_debug_errno(params->unit_id, r, "Failed to adjust OOM setting, assuming containerized execution, ignoring: %m"); | |
1421 | log_close(); | |
1422 | } else if (r < 0) { | |
1423 | *exit_status = EXIT_OOM_ADJUST; | |
d35fbf6b | 1424 | return -errno; |
613b411c | 1425 | } |
d35fbf6b DM |
1426 | } |
1427 | ||
1428 | if (context->nice_set) | |
1429 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
ff0af2a1 | 1430 | *exit_status = EXIT_NICE; |
d35fbf6b | 1431 | return -errno; |
613b411c LP |
1432 | } |
1433 | ||
d35fbf6b DM |
1434 | if (context->cpu_sched_set) { |
1435 | struct sched_param param = { | |
1436 | .sched_priority = context->cpu_sched_priority, | |
1437 | }; | |
1438 | ||
ff0af2a1 LP |
1439 | r = sched_setscheduler(0, |
1440 | context->cpu_sched_policy | | |
1441 | (context->cpu_sched_reset_on_fork ? | |
1442 | SCHED_RESET_ON_FORK : 0), | |
1443 | ¶m); | |
1444 | if (r < 0) { | |
1445 | *exit_status = EXIT_SETSCHEDULER; | |
d35fbf6b | 1446 | return -errno; |
fc9b2a84 | 1447 | } |
d35fbf6b | 1448 | } |
fc9b2a84 | 1449 | |
d35fbf6b DM |
1450 | if (context->cpuset) |
1451 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
ff0af2a1 | 1452 | *exit_status = EXIT_CPUAFFINITY; |
d35fbf6b | 1453 | return -errno; |
034c6ed7 LP |
1454 | } |
1455 | ||
d35fbf6b DM |
1456 | if (context->ioprio_set) |
1457 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
ff0af2a1 | 1458 | *exit_status = EXIT_IOPRIO; |
d35fbf6b DM |
1459 | return -errno; |
1460 | } | |
da726a4d | 1461 | |
d35fbf6b DM |
1462 | if (context->timer_slack_nsec != NSEC_INFINITY) |
1463 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
ff0af2a1 | 1464 | *exit_status = EXIT_TIMERSLACK; |
d35fbf6b | 1465 | return -errno; |
4c2630eb | 1466 | } |
9eba9da4 | 1467 | |
d35fbf6b DM |
1468 | if (context->personality != 0xffffffffUL) |
1469 | if (personality(context->personality) < 0) { | |
ff0af2a1 | 1470 | *exit_status = EXIT_PERSONALITY; |
d35fbf6b | 1471 | return -errno; |
4c2630eb | 1472 | } |
94f04347 | 1473 | |
d35fbf6b DM |
1474 | if (context->utmp_id) |
1475 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path); | |
1476 | ||
524daa8c | 1477 | if (context->user && is_terminal_input(context->std_input)) { |
ff0af2a1 LP |
1478 | r = chown_terminal(STDIN_FILENO, uid); |
1479 | if (r < 0) { | |
1480 | *exit_status = EXIT_STDIN; | |
1481 | return r; | |
071830ff | 1482 | } |
d35fbf6b | 1483 | } |
8e274523 | 1484 | |
e44da745 DM |
1485 | #ifdef ENABLE_KDBUS |
1486 | if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) { | |
fed1e721 | 1487 | uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid; |
e44da745 | 1488 | |
ff0af2a1 LP |
1489 | r = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint); |
1490 | if (r < 0) { | |
1491 | *exit_status = EXIT_BUS_ENDPOINT; | |
1492 | return r; | |
e44da745 DM |
1493 | } |
1494 | } | |
1495 | #endif | |
1496 | ||
a931ad47 LP |
1497 | /* If delegation is enabled we'll pass ownership of the cgroup |
1498 | * (but only in systemd's own controller hierarchy!) to the | |
1499 | * user of the new process. */ | |
1500 | if (params->cgroup_path && context->user && params->cgroup_delegate) { | |
ff0af2a1 LP |
1501 | r = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid); |
1502 | if (r < 0) { | |
1503 | *exit_status = EXIT_CGROUP; | |
1504 | return r; | |
d35fbf6b | 1505 | } |
034c6ed7 | 1506 | |
034c6ed7 | 1507 | |
ff0af2a1 LP |
1508 | r = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0755, uid, gid); |
1509 | if (r < 0) { | |
1510 | *exit_status = EXIT_CGROUP; | |
1511 | return r; | |
034c6ed7 | 1512 | } |
d35fbf6b | 1513 | } |
034c6ed7 | 1514 | |
d35fbf6b DM |
1515 | if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) { |
1516 | char **rt; | |
fb33a393 | 1517 | |
d35fbf6b DM |
1518 | STRV_FOREACH(rt, context->runtime_directory) { |
1519 | _cleanup_free_ char *p; | |
94f04347 | 1520 | |
d35fbf6b DM |
1521 | p = strjoin(params->runtime_prefix, "/", *rt, NULL); |
1522 | if (!p) { | |
ff0af2a1 | 1523 | *exit_status = EXIT_RUNTIME_DIRECTORY; |
d35fbf6b | 1524 | return -ENOMEM; |
94f04347 | 1525 | } |
94f04347 | 1526 | |
ff0af2a1 LP |
1527 | r = mkdir_safe(p, context->runtime_directory_mode, uid, gid); |
1528 | if (r < 0) { | |
1529 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1530 | return r; | |
94f04347 | 1531 | } |
d35fbf6b DM |
1532 | } |
1533 | } | |
94f04347 | 1534 | |
d35fbf6b | 1535 | if (params->apply_permissions) { |
ff0af2a1 LP |
1536 | r = enforce_groups(context, username, gid); |
1537 | if (r < 0) { | |
1538 | *exit_status = EXIT_GROUP; | |
1539 | return r; | |
d35fbf6b DM |
1540 | } |
1541 | } | |
9eba9da4 | 1542 | |
d35fbf6b | 1543 | umask(context->umask); |
94f04347 | 1544 | |
d35fbf6b DM |
1545 | #ifdef HAVE_PAM |
1546 | if (params->apply_permissions && context->pam_name && username) { | |
ff0af2a1 LP |
1547 | r = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds); |
1548 | if (r < 0) { | |
1549 | *exit_status = EXIT_PAM; | |
1550 | return r; | |
d35fbf6b DM |
1551 | } |
1552 | } | |
1553 | #endif | |
ac45f971 | 1554 | |
d35fbf6b | 1555 | if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) { |
ff0af2a1 LP |
1556 | r = setup_netns(runtime->netns_storage_socket); |
1557 | if (r < 0) { | |
1558 | *exit_status = EXIT_NETWORK; | |
1559 | return r; | |
d35fbf6b DM |
1560 | } |
1561 | } | |
169c1bda | 1562 | |
d35fbf6b DM |
1563 | if (!strv_isempty(context->read_write_dirs) || |
1564 | !strv_isempty(context->read_only_dirs) || | |
1565 | !strv_isempty(context->inaccessible_dirs) || | |
1566 | context->mount_flags != 0 || | |
1567 | (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) || | |
e44da745 | 1568 | params->bus_endpoint_path || |
d35fbf6b DM |
1569 | context->private_devices || |
1570 | context->protect_system != PROTECT_SYSTEM_NO || | |
1571 | context->protect_home != PROTECT_HOME_NO) { | |
1572 | ||
1573 | char *tmp = NULL, *var = NULL; | |
1574 | ||
1575 | /* The runtime struct only contains the parent | |
1576 | * of the private /tmp, which is | |
1577 | * non-accessible to world users. Inside of it | |
1578 | * there's a /tmp that is sticky, and that's | |
1579 | * the one we want to use here. */ | |
1580 | ||
1581 | if (context->private_tmp && runtime) { | |
1582 | if (runtime->tmp_dir) | |
63c372cb | 1583 | tmp = strjoina(runtime->tmp_dir, "/tmp"); |
d35fbf6b | 1584 | if (runtime->var_tmp_dir) |
63c372cb | 1585 | var = strjoina(runtime->var_tmp_dir, "/tmp"); |
d35fbf6b | 1586 | } |
d8b4e2e9 | 1587 | |
ff0af2a1 | 1588 | r = setup_namespace( |
d35fbf6b DM |
1589 | context->read_write_dirs, |
1590 | context->read_only_dirs, | |
1591 | context->inaccessible_dirs, | |
1592 | tmp, | |
1593 | var, | |
e44da745 | 1594 | params->bus_endpoint_path, |
d35fbf6b DM |
1595 | context->private_devices, |
1596 | context->protect_home, | |
1597 | context->protect_system, | |
1598 | context->mount_flags); | |
0015ebf3 | 1599 | |
ff0af2a1 LP |
1600 | /* If we couldn't set up the namespace this is |
1601 | * probably due to a missing capability. In this case, | |
1602 | * silently proceeed. */ | |
1603 | if (r == -EPERM || r == -EACCES) { | |
1604 | log_open(); | |
1605 | log_unit_debug_errno(params->unit_id, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m"); | |
1606 | log_close(); | |
1607 | } else if (r < 0) { | |
1608 | *exit_status = EXIT_NAMESPACE; | |
1609 | return r; | |
81a2b7ce | 1610 | } |
d35fbf6b | 1611 | } |
81a2b7ce | 1612 | |
d35fbf6b DM |
1613 | if (params->apply_chroot) { |
1614 | if (context->root_directory) | |
1615 | if (chroot(context->root_directory) < 0) { | |
ff0af2a1 | 1616 | *exit_status = EXIT_CHROOT; |
d35fbf6b | 1617 | return -errno; |
8aa75193 LP |
1618 | } |
1619 | ||
4c08c824 LP |
1620 | if (chdir(context->working_directory ?: "/") < 0 && |
1621 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1622 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1623 | return -errno; |
1624 | } | |
1625 | } else { | |
1626 | _cleanup_free_ char *d = NULL; | |
8aa75193 | 1627 | |
d35fbf6b | 1628 | if (asprintf(&d, "%s/%s", |
cf1d0302 LP |
1629 | context->root_directory ?: "", |
1630 | context->working_directory ?: "") < 0) { | |
ff0af2a1 | 1631 | *exit_status = EXIT_MEMORY; |
d35fbf6b | 1632 | return -ENOMEM; |
8aa75193 | 1633 | } |
8aa75193 | 1634 | |
cf1d0302 LP |
1635 | if (chdir(d) < 0 && |
1636 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1637 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1638 | return -errno; |
1639 | } | |
1640 | } | |
e66cf1a3 | 1641 | |
9008e1ac MS |
1642 | #ifdef HAVE_SELINUX |
1643 | if (params->apply_permissions && mac_selinux_use() && params->selinux_context_net && socket_fd >= 0) { | |
ff0af2a1 LP |
1644 | r = mac_selinux_get_child_mls_label(socket_fd, command->path, context->selinux_context, &mac_selinux_context_net); |
1645 | if (r < 0) { | |
1646 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1647 | return r; | |
9008e1ac MS |
1648 | } |
1649 | } | |
1650 | #endif | |
1651 | ||
d35fbf6b DM |
1652 | /* We repeat the fd closing here, to make sure that |
1653 | * nothing is leaked from the PAM modules. Note that | |
1654 | * we are more aggressive this time since socket_fd | |
e44da745 DM |
1655 | * and the netns fds we don't need anymore. The custom |
1656 | * endpoint fd was needed to upload the policy and can | |
1657 | * now be closed as well. */ | |
ff0af2a1 LP |
1658 | r = close_all_fds(fds, n_fds); |
1659 | if (r >= 0) | |
1660 | r = shift_fds(fds, n_fds); | |
1661 | if (r >= 0) | |
1662 | r = flags_fds(fds, n_fds, context->non_blocking); | |
1663 | if (r < 0) { | |
1664 | *exit_status = EXIT_FDS; | |
1665 | return r; | |
d35fbf6b | 1666 | } |
e66cf1a3 | 1667 | |
d35fbf6b | 1668 | if (params->apply_permissions) { |
e66cf1a3 | 1669 | |
d35fbf6b DM |
1670 | for (i = 0; i < _RLIMIT_MAX; i++) { |
1671 | if (!context->rlimit[i]) | |
1672 | continue; | |
1673 | ||
1674 | if (setrlimit_closest(i, context->rlimit[i]) < 0) { | |
ff0af2a1 | 1675 | *exit_status = EXIT_LIMITS; |
d35fbf6b | 1676 | return -errno; |
e66cf1a3 LP |
1677 | } |
1678 | } | |
1679 | ||
d35fbf6b | 1680 | if (context->capability_bounding_set_drop) { |
ff0af2a1 LP |
1681 | r = capability_bounding_set_drop(context->capability_bounding_set_drop, false); |
1682 | if (r < 0) { | |
1683 | *exit_status = EXIT_CAPABILITIES; | |
1684 | return r; | |
3b8bddde | 1685 | } |
4c2630eb | 1686 | } |
3b8bddde | 1687 | |
2ca620c4 WC |
1688 | #ifdef HAVE_SMACK |
1689 | if (context->smack_process_label) { | |
ff0af2a1 LP |
1690 | r = mac_smack_apply_pid(0, context->smack_process_label); |
1691 | if (r < 0) { | |
1692 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1693 | return r; | |
2ca620c4 WC |
1694 | } |
1695 | } | |
1696 | #endif | |
1697 | ||
d35fbf6b | 1698 | if (context->user) { |
ff0af2a1 LP |
1699 | r = enforce_user(context, uid); |
1700 | if (r < 0) { | |
1701 | *exit_status = EXIT_USER; | |
1702 | return r; | |
5b6319dc LP |
1703 | } |
1704 | } | |
d35fbf6b DM |
1705 | |
1706 | /* PR_GET_SECUREBITS is not privileged, while | |
1707 | * PR_SET_SECUREBITS is. So to suppress | |
1708 | * potential EPERMs we'll try not to call | |
1709 | * PR_SET_SECUREBITS unless necessary. */ | |
1710 | if (prctl(PR_GET_SECUREBITS) != context->secure_bits) | |
1711 | if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) { | |
ff0af2a1 | 1712 | *exit_status = EXIT_SECUREBITS; |
d35fbf6b | 1713 | return -errno; |
ff01d048 | 1714 | } |
5b6319dc | 1715 | |
d35fbf6b DM |
1716 | if (context->capabilities) |
1717 | if (cap_set_proc(context->capabilities) < 0) { | |
ff0af2a1 | 1718 | *exit_status = EXIT_CAPABILITIES; |
d35fbf6b | 1719 | return -errno; |
613b411c LP |
1720 | } |
1721 | ||
d35fbf6b DM |
1722 | if (context->no_new_privileges) |
1723 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { | |
ff0af2a1 | 1724 | *exit_status = EXIT_NO_NEW_PRIVILEGES; |
d35fbf6b DM |
1725 | return -errno; |
1726 | } | |
1727 | ||
1728 | #ifdef HAVE_SECCOMP | |
1729 | if (context->address_families_whitelist || | |
1730 | !set_isempty(context->address_families)) { | |
ff0af2a1 LP |
1731 | r = apply_address_families(context); |
1732 | if (r < 0) { | |
1733 | *exit_status = EXIT_ADDRESS_FAMILIES; | |
1734 | return r; | |
4c2630eb MS |
1735 | } |
1736 | } | |
04aa0cb9 | 1737 | |
d35fbf6b DM |
1738 | if (context->syscall_whitelist || |
1739 | !set_isempty(context->syscall_filter) || | |
1740 | !set_isempty(context->syscall_archs)) { | |
ff0af2a1 LP |
1741 | r = apply_seccomp(context); |
1742 | if (r < 0) { | |
1743 | *exit_status = EXIT_SECCOMP; | |
1744 | return r; | |
81a2b7ce | 1745 | } |
d35fbf6b DM |
1746 | } |
1747 | #endif | |
81a2b7ce | 1748 | |
d35fbf6b | 1749 | #ifdef HAVE_SELINUX |
6baa7db0 | 1750 | if (mac_selinux_use()) { |
9008e1ac | 1751 | char *exec_context = mac_selinux_context_net ?: context->selinux_context; |
16115b0a | 1752 | |
9008e1ac | 1753 | if (exec_context) { |
ff0af2a1 LP |
1754 | r = setexeccon(exec_context); |
1755 | if (r < 0) { | |
1756 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1757 | return r; | |
16115b0a | 1758 | } |
81a2b7ce | 1759 | } |
81a2b7ce | 1760 | } |
d35fbf6b | 1761 | #endif |
81a2b7ce | 1762 | |
d35fbf6b | 1763 | #ifdef HAVE_APPARMOR |
6baa7db0 | 1764 | if (context->apparmor_profile && mac_apparmor_use()) { |
ff0af2a1 LP |
1765 | r = aa_change_onexec(context->apparmor_profile); |
1766 | if (r < 0 && !context->apparmor_profile_ignore) { | |
1767 | *exit_status = EXIT_APPARMOR_PROFILE; | |
5482192e | 1768 | return -errno; |
d35fbf6b | 1769 | } |
034c6ed7 | 1770 | } |
d35fbf6b DM |
1771 | #endif |
1772 | } | |
034c6ed7 | 1773 | |
ff0af2a1 LP |
1774 | r = build_environment(context, n_fds, params->watchdog_usec, home, username, shell, &our_env); |
1775 | if (r < 0) { | |
1776 | *exit_status = EXIT_MEMORY; | |
1777 | return r; | |
d35fbf6b | 1778 | } |
034c6ed7 | 1779 | |
d35fbf6b DM |
1780 | final_env = strv_env_merge(5, |
1781 | params->environment, | |
1782 | our_env, | |
1783 | context->environment, | |
1784 | files_env, | |
1785 | pam_env, | |
1786 | NULL); | |
1787 | if (!final_env) { | |
ff0af2a1 | 1788 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
1789 | return -ENOMEM; |
1790 | } | |
81a2b7ce | 1791 | |
d35fbf6b DM |
1792 | final_argv = replace_env_argv(argv, final_env); |
1793 | if (!final_argv) { | |
ff0af2a1 | 1794 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
1795 | return -ENOMEM; |
1796 | } | |
034c6ed7 | 1797 | |
d35fbf6b | 1798 | final_env = strv_env_clean(final_env); |
260abb78 | 1799 | |
553d2243 | 1800 | if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { |
d35fbf6b | 1801 | _cleanup_free_ char *line; |
81a2b7ce | 1802 | |
d35fbf6b DM |
1803 | line = exec_command_line(final_argv); |
1804 | if (line) { | |
1805 | log_open(); | |
e2cc6eca LP |
1806 | log_unit_struct(params->unit_id, |
1807 | LOG_DEBUG, | |
d35fbf6b | 1808 | "EXECUTABLE=%s", command->path, |
e2cc6eca | 1809 | LOG_MESSAGE("Executing: %s", line), |
d35fbf6b DM |
1810 | NULL); |
1811 | log_close(); | |
1812 | } | |
1813 | } | |
1814 | execve(command->path, final_argv, final_env); | |
ff0af2a1 | 1815 | *exit_status = EXIT_EXEC; |
d35fbf6b DM |
1816 | return -errno; |
1817 | } | |
81a2b7ce | 1818 | |
d35fbf6b DM |
1819 | int exec_spawn(ExecCommand *command, |
1820 | const ExecContext *context, | |
1821 | const ExecParameters *params, | |
1822 | ExecRuntime *runtime, | |
1823 | pid_t *ret) { | |
8351ceae | 1824 | |
d35fbf6b DM |
1825 | _cleanup_strv_free_ char **files_env = NULL; |
1826 | int *fds = NULL; unsigned n_fds = 0; | |
ff0af2a1 LP |
1827 | _cleanup_free_ char *line = NULL; |
1828 | int socket_fd, r; | |
1829 | char **argv; | |
d35fbf6b | 1830 | pid_t pid; |
8351ceae | 1831 | |
d35fbf6b DM |
1832 | assert(command); |
1833 | assert(context); | |
1834 | assert(ret); | |
1835 | assert(params); | |
1836 | assert(params->fds || params->n_fds <= 0); | |
4298d0b5 | 1837 | |
d35fbf6b DM |
1838 | if (context->std_input == EXEC_INPUT_SOCKET || |
1839 | context->std_output == EXEC_OUTPUT_SOCKET || | |
1840 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 1841 | |
ff0af2a1 LP |
1842 | if (params->n_fds != 1) { |
1843 | log_unit_error(params->unit_id, "Got more than one socket."); | |
d35fbf6b | 1844 | return -EINVAL; |
ff0af2a1 | 1845 | } |
eef65bf3 | 1846 | |
d35fbf6b DM |
1847 | socket_fd = params->fds[0]; |
1848 | } else { | |
1849 | socket_fd = -1; | |
1850 | fds = params->fds; | |
1851 | n_fds = params->n_fds; | |
1852 | } | |
94f04347 | 1853 | |
ff0af2a1 LP |
1854 | r = exec_context_load_environment(context, params->unit_id, &files_env); |
1855 | if (r < 0) | |
1856 | return log_unit_error_errno(params->unit_id, r, "Failed to load environment files: %m"); | |
034c6ed7 | 1857 | |
d35fbf6b | 1858 | argv = params->argv ?: command->argv; |
d35fbf6b DM |
1859 | line = exec_command_line(argv); |
1860 | if (!line) | |
1861 | return log_oom(); | |
fab56fc5 | 1862 | |
e2cc6eca LP |
1863 | log_unit_struct(params->unit_id, |
1864 | LOG_DEBUG, | |
d35fbf6b | 1865 | "EXECUTABLE=%s", command->path, |
e2cc6eca | 1866 | LOG_MESSAGE("About to execute: %s", line), |
d35fbf6b | 1867 | NULL); |
d35fbf6b DM |
1868 | pid = fork(); |
1869 | if (pid < 0) | |
ff0af2a1 | 1870 | return log_unit_error_errno(params->unit_id, r, "Failed to fork: %m"); |
d35fbf6b DM |
1871 | |
1872 | if (pid == 0) { | |
ff0af2a1 LP |
1873 | int exit_status; |
1874 | ||
1875 | r = exec_child(command, | |
1876 | context, | |
1877 | params, | |
1878 | runtime, | |
1879 | argv, | |
1880 | socket_fd, | |
1881 | fds, n_fds, | |
1882 | files_env, | |
1883 | &exit_status); | |
1884 | if (r < 0) { | |
4c2630eb | 1885 | log_open(); |
ff0af2a1 LP |
1886 | log_unit_struct(params->unit_id, |
1887 | LOG_ERR, | |
1888 | LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), | |
1889 | "EXECUTABLE=%s", command->path, | |
1890 | LOG_MESSAGE("Failed at step %s spawning %s: %s", | |
1891 | exit_status_to_string(exit_status, EXIT_STATUS_SYSTEMD), | |
1892 | command->path, strerror(-r)), | |
1893 | LOG_ERRNO(r), | |
1894 | NULL); | |
4c2630eb MS |
1895 | } |
1896 | ||
ff0af2a1 | 1897 | _exit(exit_status); |
034c6ed7 LP |
1898 | } |
1899 | ||
ff0af2a1 | 1900 | log_unit_debug(params->unit_id, "Forked %s as "PID_FMT, command->path, pid); |
23635a85 | 1901 | |
80876c20 LP |
1902 | /* We add the new process to the cgroup both in the child (so |
1903 | * that we can be sure that no user code is ever executed | |
1904 | * outside of the cgroup) and in the parent (so that we can be | |
1905 | * sure that when we kill the cgroup the process will be | |
1906 | * killed too). */ | |
d35fbf6b DM |
1907 | if (params->cgroup_path) |
1908 | cg_attach(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, pid); | |
2da3263a | 1909 | |
b58b4116 | 1910 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 1911 | |
034c6ed7 | 1912 | *ret = pid; |
5cb5a6ff LP |
1913 | return 0; |
1914 | } | |
1915 | ||
034c6ed7 LP |
1916 | void exec_context_init(ExecContext *c) { |
1917 | assert(c); | |
1918 | ||
4c12626c | 1919 | c->umask = 0022; |
9eba9da4 | 1920 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 1921 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 1922 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 1923 | c->syslog_level_prefix = true; |
353e12c2 | 1924 | c->ignore_sigpipe = true; |
3a43da28 | 1925 | c->timer_slack_nsec = NSEC_INFINITY; |
ac45f971 | 1926 | c->personality = 0xffffffffUL; |
e66cf1a3 | 1927 | c->runtime_directory_mode = 0755; |
034c6ed7 LP |
1928 | } |
1929 | ||
613b411c | 1930 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
1931 | unsigned l; |
1932 | ||
1933 | assert(c); | |
1934 | ||
1935 | strv_free(c->environment); | |
034c6ed7 | 1936 | c->environment = NULL; |
5cb5a6ff | 1937 | |
8c7be95e LP |
1938 | strv_free(c->environment_files); |
1939 | c->environment_files = NULL; | |
1940 | ||
034c6ed7 | 1941 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) { |
5cb5a6ff | 1942 | free(c->rlimit[l]); |
034c6ed7 LP |
1943 | c->rlimit[l] = NULL; |
1944 | } | |
1945 | ||
9eba9da4 LP |
1946 | free(c->working_directory); |
1947 | c->working_directory = NULL; | |
1948 | free(c->root_directory); | |
1949 | c->root_directory = NULL; | |
5cb5a6ff | 1950 | |
80876c20 LP |
1951 | free(c->tty_path); |
1952 | c->tty_path = NULL; | |
1953 | ||
071830ff LP |
1954 | free(c->syslog_identifier); |
1955 | c->syslog_identifier = NULL; | |
1956 | ||
5cb5a6ff | 1957 | free(c->user); |
034c6ed7 LP |
1958 | c->user = NULL; |
1959 | ||
5cb5a6ff | 1960 | free(c->group); |
034c6ed7 LP |
1961 | c->group = NULL; |
1962 | ||
1963 | strv_free(c->supplementary_groups); | |
1964 | c->supplementary_groups = NULL; | |
94f04347 | 1965 | |
5b6319dc LP |
1966 | free(c->pam_name); |
1967 | c->pam_name = NULL; | |
1968 | ||
94f04347 LP |
1969 | if (c->capabilities) { |
1970 | cap_free(c->capabilities); | |
1971 | c->capabilities = NULL; | |
1972 | } | |
15ae422b LP |
1973 | |
1974 | strv_free(c->read_only_dirs); | |
1975 | c->read_only_dirs = NULL; | |
1976 | ||
1977 | strv_free(c->read_write_dirs); | |
1978 | c->read_write_dirs = NULL; | |
1979 | ||
1980 | strv_free(c->inaccessible_dirs); | |
1981 | c->inaccessible_dirs = NULL; | |
82c121a4 LP |
1982 | |
1983 | if (c->cpuset) | |
1984 | CPU_FREE(c->cpuset); | |
86a3475b LP |
1985 | |
1986 | free(c->utmp_id); | |
1987 | c->utmp_id = NULL; | |
b9a0e010 | 1988 | |
7b52a628 MS |
1989 | free(c->selinux_context); |
1990 | c->selinux_context = NULL; | |
1991 | ||
eef65bf3 MS |
1992 | free(c->apparmor_profile); |
1993 | c->apparmor_profile = NULL; | |
1994 | ||
17df7223 LP |
1995 | set_free(c->syscall_filter); |
1996 | c->syscall_filter = NULL; | |
57183d11 LP |
1997 | |
1998 | set_free(c->syscall_archs); | |
1999 | c->syscall_archs = NULL; | |
4298d0b5 LP |
2000 | |
2001 | set_free(c->address_families); | |
2002 | c->address_families = NULL; | |
e66cf1a3 LP |
2003 | |
2004 | strv_free(c->runtime_directory); | |
2005 | c->runtime_directory = NULL; | |
bb7dd0b0 DM |
2006 | |
2007 | bus_endpoint_free(c->bus_endpoint); | |
2008 | c->bus_endpoint = NULL; | |
e66cf1a3 LP |
2009 | } |
2010 | ||
2011 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) { | |
2012 | char **i; | |
2013 | ||
2014 | assert(c); | |
2015 | ||
2016 | if (!runtime_prefix) | |
2017 | return 0; | |
2018 | ||
2019 | STRV_FOREACH(i, c->runtime_directory) { | |
2020 | _cleanup_free_ char *p; | |
2021 | ||
2022 | p = strjoin(runtime_prefix, "/", *i, NULL); | |
2023 | if (!p) | |
2024 | return -ENOMEM; | |
2025 | ||
2026 | /* We execute this synchronously, since we need to be | |
2027 | * sure this is gone when we start the service | |
2028 | * next. */ | |
24167f3d | 2029 | rm_rf(p, false, true, false); |
e66cf1a3 LP |
2030 | } |
2031 | ||
2032 | return 0; | |
5cb5a6ff LP |
2033 | } |
2034 | ||
43d0fcbd LP |
2035 | void exec_command_done(ExecCommand *c) { |
2036 | assert(c); | |
2037 | ||
2038 | free(c->path); | |
2039 | c->path = NULL; | |
2040 | ||
2041 | strv_free(c->argv); | |
2042 | c->argv = NULL; | |
2043 | } | |
2044 | ||
2045 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
2046 | unsigned i; | |
2047 | ||
2048 | for (i = 0; i < n; i++) | |
2049 | exec_command_done(c+i); | |
2050 | } | |
2051 | ||
f1acf85a | 2052 | ExecCommand* exec_command_free_list(ExecCommand *c) { |
5cb5a6ff LP |
2053 | ExecCommand *i; |
2054 | ||
2055 | while ((i = c)) { | |
71fda00f | 2056 | LIST_REMOVE(command, c, i); |
43d0fcbd | 2057 | exec_command_done(i); |
5cb5a6ff LP |
2058 | free(i); |
2059 | } | |
f1acf85a ZJS |
2060 | |
2061 | return NULL; | |
5cb5a6ff LP |
2062 | } |
2063 | ||
034c6ed7 LP |
2064 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
2065 | unsigned i; | |
2066 | ||
f1acf85a ZJS |
2067 | for (i = 0; i < n; i++) |
2068 | c[i] = exec_command_free_list(c[i]); | |
034c6ed7 LP |
2069 | } |
2070 | ||
039f0e70 LP |
2071 | typedef struct InvalidEnvInfo { |
2072 | const char *unit_id; | |
2073 | const char *path; | |
2074 | } InvalidEnvInfo; | |
2075 | ||
2076 | static void invalid_env(const char *p, void *userdata) { | |
2077 | InvalidEnvInfo *info = userdata; | |
2078 | ||
2079 | log_unit_error(info->unit_id, "Ignoring invalid environment assignment '%s': %s", p, info->path); | |
2080 | } | |
2081 | ||
7491ccf2 | 2082 | int exec_context_load_environment(const ExecContext *c, const char *unit_id, char ***l) { |
8c7be95e LP |
2083 | char **i, **r = NULL; |
2084 | ||
2085 | assert(c); | |
2086 | assert(l); | |
2087 | ||
2088 | STRV_FOREACH(i, c->environment_files) { | |
2089 | char *fn; | |
2090 | int k; | |
2091 | bool ignore = false; | |
2092 | char **p; | |
7fd1b19b | 2093 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 2094 | int count, n; |
8c7be95e LP |
2095 | |
2096 | fn = *i; | |
2097 | ||
2098 | if (fn[0] == '-') { | |
2099 | ignore = true; | |
2100 | fn ++; | |
2101 | } | |
2102 | ||
2103 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
2104 | if (ignore) |
2105 | continue; | |
2106 | ||
2107 | strv_free(r); | |
2108 | return -EINVAL; | |
2109 | } | |
2110 | ||
2bef10ab | 2111 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
2112 | errno = 0; |
2113 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
2114 | if (ignore) |
2115 | continue; | |
8c7be95e | 2116 | |
2bef10ab PL |
2117 | strv_free(r); |
2118 | return errno ? -errno : -EINVAL; | |
2119 | } | |
2120 | count = pglob.gl_pathc; | |
2121 | if (count == 0) { | |
8c7be95e LP |
2122 | if (ignore) |
2123 | continue; | |
2124 | ||
2125 | strv_free(r); | |
2bef10ab | 2126 | return -EINVAL; |
8c7be95e | 2127 | } |
2bef10ab | 2128 | for (n = 0; n < count; n++) { |
717603e3 | 2129 | k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
2130 | if (k < 0) { |
2131 | if (ignore) | |
2132 | continue; | |
8c7be95e | 2133 | |
2bef10ab | 2134 | strv_free(r); |
2bef10ab | 2135 | return k; |
e9c1ea9d | 2136 | } |
ebc05a09 | 2137 | /* Log invalid environment variables with filename */ |
039f0e70 LP |
2138 | if (p) { |
2139 | InvalidEnvInfo info = { | |
2140 | .unit_id = unit_id, | |
2141 | .path = pglob.gl_pathv[n] | |
2142 | }; | |
2143 | ||
2144 | p = strv_env_clean_with_callback(p, invalid_env, &info); | |
2145 | } | |
8c7be95e | 2146 | |
2bef10ab PL |
2147 | if (r == NULL) |
2148 | r = p; | |
2149 | else { | |
2150 | char **m; | |
8c7be95e | 2151 | |
2bef10ab PL |
2152 | m = strv_env_merge(2, r, p); |
2153 | strv_free(r); | |
2154 | strv_free(p); | |
c84a9488 | 2155 | if (!m) |
2bef10ab | 2156 | return -ENOMEM; |
2bef10ab PL |
2157 | |
2158 | r = m; | |
2159 | } | |
8c7be95e LP |
2160 | } |
2161 | } | |
2162 | ||
2163 | *l = r; | |
2164 | ||
2165 | return 0; | |
2166 | } | |
2167 | ||
6ac8fdc9 | 2168 | static bool tty_may_match_dev_console(const char *tty) { |
e1d75803 RC |
2169 | _cleanup_free_ char *active = NULL; |
2170 | char *console; | |
6ac8fdc9 MS |
2171 | |
2172 | if (startswith(tty, "/dev/")) | |
2173 | tty += 5; | |
2174 | ||
2175 | /* trivial identity? */ | |
2176 | if (streq(tty, "console")) | |
2177 | return true; | |
2178 | ||
2179 | console = resolve_dev_console(&active); | |
2180 | /* if we could not resolve, assume it may */ | |
2181 | if (!console) | |
2182 | return true; | |
2183 | ||
2184 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
e1d75803 | 2185 | return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
2186 | } |
2187 | ||
2188 | bool exec_context_may_touch_console(ExecContext *ec) { | |
2189 | return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate || | |
2190 | is_terminal_input(ec->std_input) || | |
2191 | is_terminal_output(ec->std_output) || | |
2192 | is_terminal_output(ec->std_error)) && | |
2193 | tty_may_match_dev_console(tty_path(ec)); | |
2194 | } | |
2195 | ||
15ae422b LP |
2196 | static void strv_fprintf(FILE *f, char **l) { |
2197 | char **g; | |
2198 | ||
2199 | assert(f); | |
2200 | ||
2201 | STRV_FOREACH(g, l) | |
2202 | fprintf(f, " %s", *g); | |
2203 | } | |
2204 | ||
5cb5a6ff | 2205 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
507f22bd | 2206 | char **e; |
94f04347 | 2207 | unsigned i; |
9eba9da4 | 2208 | |
5cb5a6ff LP |
2209 | assert(c); |
2210 | assert(f); | |
2211 | ||
4ad49000 | 2212 | prefix = strempty(prefix); |
5cb5a6ff LP |
2213 | |
2214 | fprintf(f, | |
94f04347 LP |
2215 | "%sUMask: %04o\n" |
2216 | "%sWorkingDirectory: %s\n" | |
451a074f | 2217 | "%sRootDirectory: %s\n" |
15ae422b | 2218 | "%sNonBlocking: %s\n" |
64747e2d | 2219 | "%sPrivateTmp: %s\n" |
4819ff03 | 2220 | "%sPrivateNetwork: %s\n" |
7f112f50 | 2221 | "%sPrivateDevices: %s\n" |
1b8689f9 LP |
2222 | "%sProtectHome: %s\n" |
2223 | "%sProtectSystem: %s\n" | |
3bb07b76 | 2224 | "%sIgnoreSIGPIPE: %s\n", |
5cb5a6ff | 2225 | prefix, c->umask, |
9eba9da4 | 2226 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 2227 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 2228 | prefix, yes_no(c->non_blocking), |
64747e2d | 2229 | prefix, yes_no(c->private_tmp), |
4819ff03 | 2230 | prefix, yes_no(c->private_network), |
7f112f50 | 2231 | prefix, yes_no(c->private_devices), |
1b8689f9 LP |
2232 | prefix, protect_home_to_string(c->protect_home), |
2233 | prefix, protect_system_to_string(c->protect_system), | |
3bb07b76 | 2234 | prefix, yes_no(c->ignore_sigpipe)); |
fb33a393 | 2235 | |
8c7be95e LP |
2236 | STRV_FOREACH(e, c->environment) |
2237 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
2238 | ||
2239 | STRV_FOREACH(e, c->environment_files) | |
2240 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 2241 | |
fb33a393 LP |
2242 | if (c->nice_set) |
2243 | fprintf(f, | |
2244 | "%sNice: %i\n", | |
2245 | prefix, c->nice); | |
2246 | ||
dd6c17b1 | 2247 | if (c->oom_score_adjust_set) |
fb33a393 | 2248 | fprintf(f, |
dd6c17b1 LP |
2249 | "%sOOMScoreAdjust: %i\n", |
2250 | prefix, c->oom_score_adjust); | |
9eba9da4 | 2251 | |
94f04347 LP |
2252 | for (i = 0; i < RLIM_NLIMITS; i++) |
2253 | if (c->rlimit[i]) | |
de0671ee ZJS |
2254 | fprintf(f, "%s%s: "RLIM_FMT"\n", |
2255 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); | |
94f04347 | 2256 | |
f8b69d1d | 2257 | if (c->ioprio_set) { |
1756a011 | 2258 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 2259 | |
1756a011 | 2260 | ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); |
9eba9da4 LP |
2261 | fprintf(f, |
2262 | "%sIOSchedulingClass: %s\n" | |
2263 | "%sIOPriority: %i\n", | |
f8b69d1d | 2264 | prefix, strna(class_str), |
9eba9da4 | 2265 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d | 2266 | } |
94f04347 | 2267 | |
f8b69d1d | 2268 | if (c->cpu_sched_set) { |
1756a011 | 2269 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 2270 | |
1756a011 | 2271 | sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
94f04347 LP |
2272 | fprintf(f, |
2273 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
2274 | "%sCPUSchedulingPriority: %i\n" |
2275 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 2276 | prefix, strna(policy_str), |
38b48754 LP |
2277 | prefix, c->cpu_sched_priority, |
2278 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 2279 | } |
94f04347 | 2280 | |
82c121a4 | 2281 | if (c->cpuset) { |
94f04347 | 2282 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
2283 | for (i = 0; i < c->cpuset_ncpus; i++) |
2284 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
43a99a7a | 2285 | fprintf(f, " %u", i); |
94f04347 LP |
2286 | fputs("\n", f); |
2287 | } | |
2288 | ||
3a43da28 | 2289 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 2290 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
2291 | |
2292 | fprintf(f, | |
80876c20 LP |
2293 | "%sStandardInput: %s\n" |
2294 | "%sStandardOutput: %s\n" | |
2295 | "%sStandardError: %s\n", | |
2296 | prefix, exec_input_to_string(c->std_input), | |
2297 | prefix, exec_output_to_string(c->std_output), | |
2298 | prefix, exec_output_to_string(c->std_error)); | |
2299 | ||
2300 | if (c->tty_path) | |
2301 | fprintf(f, | |
6ea832a2 LP |
2302 | "%sTTYPath: %s\n" |
2303 | "%sTTYReset: %s\n" | |
2304 | "%sTTYVHangup: %s\n" | |
2305 | "%sTTYVTDisallocate: %s\n", | |
2306 | prefix, c->tty_path, | |
2307 | prefix, yes_no(c->tty_reset), | |
2308 | prefix, yes_no(c->tty_vhangup), | |
2309 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 2310 | |
5ce70e5b ZJS |
2311 | if (c->std_output == EXEC_OUTPUT_SYSLOG || |
2312 | c->std_output == EXEC_OUTPUT_KMSG || | |
2313 | c->std_output == EXEC_OUTPUT_JOURNAL || | |
2314 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2315 | c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2316 | c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
2317 | c->std_error == EXEC_OUTPUT_SYSLOG || | |
2318 | c->std_error == EXEC_OUTPUT_KMSG || | |
2319 | c->std_error == EXEC_OUTPUT_JOURNAL || | |
2320 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2321 | c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2322 | c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { | |
f8b69d1d | 2323 | |
5ce70e5b | 2324 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 2325 | |
5ce70e5b ZJS |
2326 | log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
2327 | log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
f8b69d1d | 2328 | |
94f04347 LP |
2329 | fprintf(f, |
2330 | "%sSyslogFacility: %s\n" | |
2331 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
2332 | prefix, strna(fac_str), |
2333 | prefix, strna(lvl_str)); | |
f8b69d1d | 2334 | } |
94f04347 LP |
2335 | |
2336 | if (c->capabilities) { | |
5ce70e5b ZJS |
2337 | _cleanup_cap_free_charp_ char *t; |
2338 | ||
2339 | t = cap_to_text(c->capabilities, NULL); | |
2340 | if (t) | |
2341 | fprintf(f, "%sCapabilities: %s\n", prefix, t); | |
94f04347 LP |
2342 | } |
2343 | ||
2344 | if (c->secure_bits) | |
2345 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
2346 | prefix, | |
cbb21cca ZJS |
2347 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
2348 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
2349 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
2350 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
2351 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
2352 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 LP |
2353 | |
2354 | if (c->capability_bounding_set_drop) { | |
ae556c21 | 2355 | unsigned long l; |
260abb78 | 2356 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2357 | |
64685e0c | 2358 | for (l = 0; l <= cap_last_cap(); l++) |
2822da4f LP |
2359 | if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) |
2360 | fprintf(f, " %s", strna(capability_to_name(l))); | |
94f04347 LP |
2361 | |
2362 | fputs("\n", f); | |
2363 | } | |
2364 | ||
2365 | if (c->user) | |
f2d3769a | 2366 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2367 | if (c->group) |
f2d3769a | 2368 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2369 | |
15ae422b | 2370 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2371 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2372 | strv_fprintf(f, c->supplementary_groups); |
2373 | fputs("\n", f); | |
2374 | } | |
94f04347 | 2375 | |
5b6319dc | 2376 | if (c->pam_name) |
f2d3769a | 2377 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2378 | |
15ae422b LP |
2379 | if (strv_length(c->read_write_dirs) > 0) { |
2380 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2381 | strv_fprintf(f, c->read_write_dirs); | |
2382 | fputs("\n", f); | |
2383 | } | |
2384 | ||
2385 | if (strv_length(c->read_only_dirs) > 0) { | |
2386 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2387 | strv_fprintf(f, c->read_only_dirs); | |
2388 | fputs("\n", f); | |
2389 | } | |
94f04347 | 2390 | |
15ae422b LP |
2391 | if (strv_length(c->inaccessible_dirs) > 0) { |
2392 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2393 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2394 | fputs("\n", f); |
2395 | } | |
2e22afe9 | 2396 | |
169c1bda LP |
2397 | if (c->utmp_id) |
2398 | fprintf(f, | |
2399 | "%sUtmpIdentifier: %s\n", | |
2400 | prefix, c->utmp_id); | |
7b52a628 MS |
2401 | |
2402 | if (c->selinux_context) | |
2403 | fprintf(f, | |
5f8640fb LP |
2404 | "%sSELinuxContext: %s%s\n", |
2405 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 2406 | |
ac45f971 LP |
2407 | if (c->personality != 0xffffffffUL) |
2408 | fprintf(f, | |
2409 | "%sPersonality: %s\n", | |
2410 | prefix, strna(personality_to_string(c->personality))); | |
2411 | ||
17df7223 | 2412 | if (c->syscall_filter) { |
351a19b1 | 2413 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2414 | Iterator j; |
2415 | void *id; | |
2416 | bool first = true; | |
351a19b1 | 2417 | #endif |
17df7223 LP |
2418 | |
2419 | fprintf(f, | |
57183d11 | 2420 | "%sSystemCallFilter: ", |
17df7223 LP |
2421 | prefix); |
2422 | ||
2423 | if (!c->syscall_whitelist) | |
2424 | fputc('~', f); | |
2425 | ||
351a19b1 | 2426 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2427 | SET_FOREACH(id, c->syscall_filter, j) { |
2428 | _cleanup_free_ char *name = NULL; | |
2429 | ||
2430 | if (first) | |
2431 | first = false; | |
2432 | else | |
2433 | fputc(' ', f); | |
2434 | ||
57183d11 | 2435 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 LP |
2436 | fputs(strna(name), f); |
2437 | } | |
351a19b1 | 2438 | #endif |
17df7223 LP |
2439 | |
2440 | fputc('\n', f); | |
2441 | } | |
2442 | ||
57183d11 LP |
2443 | if (c->syscall_archs) { |
2444 | #ifdef HAVE_SECCOMP | |
2445 | Iterator j; | |
2446 | void *id; | |
2447 | #endif | |
2448 | ||
2449 | fprintf(f, | |
2450 | "%sSystemCallArchitectures:", | |
2451 | prefix); | |
2452 | ||
2453 | #ifdef HAVE_SECCOMP | |
2454 | SET_FOREACH(id, c->syscall_archs, j) | |
2455 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); | |
2456 | #endif | |
2457 | fputc('\n', f); | |
2458 | } | |
2459 | ||
17df7223 LP |
2460 | if (c->syscall_errno != 0) |
2461 | fprintf(f, | |
2462 | "%sSystemCallErrorNumber: %s\n", | |
2463 | prefix, strna(errno_to_name(c->syscall_errno))); | |
eef65bf3 MS |
2464 | |
2465 | if (c->apparmor_profile) | |
2466 | fprintf(f, | |
2467 | "%sAppArmorProfile: %s%s\n", | |
2468 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
5cb5a6ff LP |
2469 | } |
2470 | ||
a931ad47 LP |
2471 | bool exec_context_maintains_privileges(ExecContext *c) { |
2472 | assert(c); | |
2473 | ||
2474 | /* Returns true if the process forked off would run run under | |
2475 | * an unchanged UID or as root. */ | |
2476 | ||
2477 | if (!c->user) | |
2478 | return true; | |
2479 | ||
2480 | if (streq(c->user, "root") || streq(c->user, "0")) | |
2481 | return true; | |
2482 | ||
2483 | return false; | |
2484 | } | |
2485 | ||
b58b4116 | 2486 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2487 | assert(s); |
5cb5a6ff | 2488 | |
b58b4116 LP |
2489 | zero(*s); |
2490 | s->pid = pid; | |
2491 | dual_timestamp_get(&s->start_timestamp); | |
2492 | } | |
2493 | ||
6ea832a2 | 2494 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2495 | assert(s); |
2496 | ||
0b1f4ae6 | 2497 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2498 | zero(*s); |
2499 | ||
034c6ed7 | 2500 | s->pid = pid; |
63983207 | 2501 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2502 | |
034c6ed7 LP |
2503 | s->code = code; |
2504 | s->status = status; | |
169c1bda | 2505 | |
6ea832a2 LP |
2506 | if (context) { |
2507 | if (context->utmp_id) | |
2508 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2509 | ||
2510 | exec_context_tty_reset(context); | |
2511 | } | |
9fb86720 LP |
2512 | } |
2513 | ||
2514 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2515 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2516 | ||
2517 | assert(s); | |
2518 | assert(f); | |
2519 | ||
9fb86720 LP |
2520 | if (s->pid <= 0) |
2521 | return; | |
2522 | ||
4c940960 LP |
2523 | prefix = strempty(prefix); |
2524 | ||
9fb86720 | 2525 | fprintf(f, |
ccd06097 ZJS |
2526 | "%sPID: "PID_FMT"\n", |
2527 | prefix, s->pid); | |
9fb86720 | 2528 | |
63983207 | 2529 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2530 | fprintf(f, |
2531 | "%sStart Timestamp: %s\n", | |
63983207 | 2532 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2533 | |
63983207 | 2534 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2535 | fprintf(f, |
2536 | "%sExit Timestamp: %s\n" | |
2537 | "%sExit Code: %s\n" | |
2538 | "%sExit Status: %i\n", | |
63983207 | 2539 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2540 | prefix, sigchld_code_to_string(s->code), |
2541 | prefix, s->status); | |
5cb5a6ff | 2542 | } |
44d8db9e | 2543 | |
9e2f7c11 | 2544 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2545 | size_t k; |
2546 | char *n, *p, **a; | |
2547 | bool first = true; | |
2548 | ||
9e2f7c11 | 2549 | assert(argv); |
44d8db9e | 2550 | |
9164977d | 2551 | k = 1; |
9e2f7c11 | 2552 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2553 | k += strlen(*a)+3; |
2554 | ||
2555 | if (!(n = new(char, k))) | |
2556 | return NULL; | |
2557 | ||
2558 | p = n; | |
9e2f7c11 | 2559 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2560 | |
2561 | if (!first) | |
2562 | *(p++) = ' '; | |
2563 | else | |
2564 | first = false; | |
2565 | ||
2566 | if (strpbrk(*a, WHITESPACE)) { | |
2567 | *(p++) = '\''; | |
2568 | p = stpcpy(p, *a); | |
2569 | *(p++) = '\''; | |
2570 | } else | |
2571 | p = stpcpy(p, *a); | |
2572 | ||
2573 | } | |
2574 | ||
9164977d LP |
2575 | *p = 0; |
2576 | ||
44d8db9e LP |
2577 | /* FIXME: this doesn't really handle arguments that have |
2578 | * spaces and ticks in them */ | |
2579 | ||
2580 | return n; | |
2581 | } | |
2582 | ||
2583 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
e1d75803 | 2584 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 2585 | const char *prefix2; |
44d8db9e LP |
2586 | |
2587 | assert(c); | |
2588 | assert(f); | |
2589 | ||
4c940960 | 2590 | prefix = strempty(prefix); |
63c372cb | 2591 | prefix2 = strjoina(prefix, "\t"); |
44d8db9e | 2592 | |
9e2f7c11 | 2593 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2594 | fprintf(f, |
2595 | "%sCommand Line: %s\n", | |
2596 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2597 | ||
9fb86720 | 2598 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
2599 | } |
2600 | ||
2601 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2602 | assert(f); | |
2603 | ||
4c940960 | 2604 | prefix = strempty(prefix); |
44d8db9e LP |
2605 | |
2606 | LIST_FOREACH(command, c, c) | |
2607 | exec_command_dump(c, f, prefix); | |
2608 | } | |
94f04347 | 2609 | |
a6a80b4f LP |
2610 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2611 | ExecCommand *end; | |
2612 | ||
2613 | assert(l); | |
2614 | assert(e); | |
2615 | ||
2616 | if (*l) { | |
35b8ca3a | 2617 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2618 | LIST_FIND_TAIL(command, *l, end); |
2619 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2620 | } else |
2621 | *l = e; | |
2622 | } | |
2623 | ||
26fd040d LP |
2624 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2625 | va_list ap; | |
2626 | char **l, *p; | |
2627 | ||
2628 | assert(c); | |
2629 | assert(path); | |
2630 | ||
2631 | va_start(ap, path); | |
2632 | l = strv_new_ap(path, ap); | |
2633 | va_end(ap); | |
2634 | ||
2635 | if (!l) | |
2636 | return -ENOMEM; | |
2637 | ||
250a918d LP |
2638 | p = strdup(path); |
2639 | if (!p) { | |
26fd040d LP |
2640 | strv_free(l); |
2641 | return -ENOMEM; | |
2642 | } | |
2643 | ||
2644 | free(c->path); | |
2645 | c->path = p; | |
2646 | ||
2647 | strv_free(c->argv); | |
2648 | c->argv = l; | |
2649 | ||
2650 | return 0; | |
2651 | } | |
2652 | ||
86b23b07 | 2653 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 2654 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 2655 | va_list ap; |
86b23b07 JS |
2656 | int r; |
2657 | ||
2658 | assert(c); | |
2659 | assert(path); | |
2660 | ||
2661 | va_start(ap, path); | |
2662 | l = strv_new_ap(path, ap); | |
2663 | va_end(ap); | |
2664 | ||
2665 | if (!l) | |
2666 | return -ENOMEM; | |
2667 | ||
2668 | r = strv_extend_strv(&c->argv, l); | |
e63ff941 | 2669 | if (r < 0) |
86b23b07 | 2670 | return r; |
86b23b07 JS |
2671 | |
2672 | return 0; | |
2673 | } | |
2674 | ||
2675 | ||
613b411c LP |
2676 | static int exec_runtime_allocate(ExecRuntime **rt) { |
2677 | ||
2678 | if (*rt) | |
2679 | return 0; | |
2680 | ||
2681 | *rt = new0(ExecRuntime, 1); | |
f146f5e1 | 2682 | if (!*rt) |
613b411c LP |
2683 | return -ENOMEM; |
2684 | ||
2685 | (*rt)->n_ref = 1; | |
2686 | (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1; | |
2687 | ||
2688 | return 0; | |
2689 | } | |
2690 | ||
2691 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) { | |
2692 | int r; | |
2693 | ||
2694 | assert(rt); | |
2695 | assert(c); | |
2696 | assert(id); | |
2697 | ||
2698 | if (*rt) | |
2699 | return 1; | |
2700 | ||
2701 | if (!c->private_network && !c->private_tmp) | |
2702 | return 0; | |
2703 | ||
2704 | r = exec_runtime_allocate(rt); | |
2705 | if (r < 0) | |
2706 | return r; | |
2707 | ||
2708 | if (c->private_network && (*rt)->netns_storage_socket[0] < 0) { | |
2709 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0) | |
2710 | return -errno; | |
2711 | } | |
2712 | ||
2713 | if (c->private_tmp && !(*rt)->tmp_dir) { | |
2714 | r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir); | |
2715 | if (r < 0) | |
2716 | return r; | |
2717 | } | |
2718 | ||
2719 | return 1; | |
2720 | } | |
2721 | ||
2722 | ExecRuntime *exec_runtime_ref(ExecRuntime *r) { | |
2723 | assert(r); | |
2724 | assert(r->n_ref > 0); | |
2725 | ||
2726 | r->n_ref++; | |
2727 | return r; | |
2728 | } | |
2729 | ||
2730 | ExecRuntime *exec_runtime_unref(ExecRuntime *r) { | |
2731 | ||
2732 | if (!r) | |
2733 | return NULL; | |
2734 | ||
2735 | assert(r->n_ref > 0); | |
2736 | ||
2737 | r->n_ref--; | |
2738 | if (r->n_ref <= 0) { | |
2739 | free(r->tmp_dir); | |
2740 | free(r->var_tmp_dir); | |
3d94f76c | 2741 | safe_close_pair(r->netns_storage_socket); |
613b411c LP |
2742 | free(r); |
2743 | } | |
2744 | ||
2745 | return NULL; | |
2746 | } | |
2747 | ||
2748 | int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds) { | |
2749 | assert(u); | |
2750 | assert(f); | |
2751 | assert(fds); | |
2752 | ||
2753 | if (!rt) | |
2754 | return 0; | |
2755 | ||
2756 | if (rt->tmp_dir) | |
2757 | unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir); | |
2758 | ||
2759 | if (rt->var_tmp_dir) | |
2760 | unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir); | |
2761 | ||
2762 | if (rt->netns_storage_socket[0] >= 0) { | |
2763 | int copy; | |
2764 | ||
2765 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); | |
2766 | if (copy < 0) | |
2767 | return copy; | |
2768 | ||
2769 | unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy); | |
2770 | } | |
2771 | ||
2772 | if (rt->netns_storage_socket[1] >= 0) { | |
2773 | int copy; | |
2774 | ||
2775 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); | |
2776 | if (copy < 0) | |
2777 | return copy; | |
2778 | ||
2779 | unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy); | |
2780 | } | |
2781 | ||
2782 | return 0; | |
2783 | } | |
2784 | ||
2785 | int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds) { | |
2786 | int r; | |
2787 | ||
2788 | assert(rt); | |
2789 | assert(key); | |
2790 | assert(value); | |
2791 | ||
2792 | if (streq(key, "tmp-dir")) { | |
2793 | char *copy; | |
2794 | ||
2795 | r = exec_runtime_allocate(rt); | |
2796 | if (r < 0) | |
2797 | return r; | |
2798 | ||
2799 | copy = strdup(value); | |
2800 | if (!copy) | |
2801 | return log_oom(); | |
2802 | ||
2803 | free((*rt)->tmp_dir); | |
2804 | (*rt)->tmp_dir = copy; | |
2805 | ||
2806 | } else if (streq(key, "var-tmp-dir")) { | |
2807 | char *copy; | |
2808 | ||
2809 | r = exec_runtime_allocate(rt); | |
2810 | if (r < 0) | |
2811 | return r; | |
2812 | ||
2813 | copy = strdup(value); | |
2814 | if (!copy) | |
2815 | return log_oom(); | |
2816 | ||
2817 | free((*rt)->var_tmp_dir); | |
2818 | (*rt)->var_tmp_dir = copy; | |
2819 | ||
2820 | } else if (streq(key, "netns-socket-0")) { | |
2821 | int fd; | |
2822 | ||
2823 | r = exec_runtime_allocate(rt); | |
2824 | if (r < 0) | |
2825 | return r; | |
2826 | ||
2827 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2828 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2829 | else { |
03e334a1 | 2830 | safe_close((*rt)->netns_storage_socket[0]); |
613b411c LP |
2831 | (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd); |
2832 | } | |
2833 | } else if (streq(key, "netns-socket-1")) { | |
2834 | int fd; | |
2835 | ||
2836 | r = exec_runtime_allocate(rt); | |
2837 | if (r < 0) | |
2838 | return r; | |
2839 | ||
2840 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2841 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2842 | else { |
03e334a1 | 2843 | safe_close((*rt)->netns_storage_socket[1]); |
613b411c LP |
2844 | (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd); |
2845 | } | |
2846 | } else | |
2847 | return 0; | |
2848 | ||
2849 | return 1; | |
2850 | } | |
2851 | ||
2852 | static void *remove_tmpdir_thread(void *p) { | |
2853 | _cleanup_free_ char *path = p; | |
2854 | ||
2855 | rm_rf_dangerous(path, false, true, false); | |
2856 | return NULL; | |
2857 | } | |
2858 | ||
2859 | void exec_runtime_destroy(ExecRuntime *rt) { | |
98b47d54 LP |
2860 | int r; |
2861 | ||
613b411c LP |
2862 | if (!rt) |
2863 | return; | |
2864 | ||
2865 | /* If there are multiple users of this, let's leave the stuff around */ | |
2866 | if (rt->n_ref > 1) | |
2867 | return; | |
2868 | ||
2869 | if (rt->tmp_dir) { | |
2870 | log_debug("Spawning thread to nuke %s", rt->tmp_dir); | |
98b47d54 LP |
2871 | |
2872 | r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir); | |
2873 | if (r < 0) { | |
da927ba9 | 2874 | log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir); |
98b47d54 LP |
2875 | free(rt->tmp_dir); |
2876 | } | |
2877 | ||
613b411c LP |
2878 | rt->tmp_dir = NULL; |
2879 | } | |
2880 | ||
2881 | if (rt->var_tmp_dir) { | |
2882 | log_debug("Spawning thread to nuke %s", rt->var_tmp_dir); | |
98b47d54 LP |
2883 | |
2884 | r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir); | |
2885 | if (r < 0) { | |
da927ba9 | 2886 | log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir); |
98b47d54 LP |
2887 | free(rt->var_tmp_dir); |
2888 | } | |
2889 | ||
613b411c LP |
2890 | rt->var_tmp_dir = NULL; |
2891 | } | |
2892 | ||
3d94f76c | 2893 | safe_close_pair(rt->netns_storage_socket); |
613b411c LP |
2894 | } |
2895 | ||
80876c20 LP |
2896 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
2897 | [EXEC_INPUT_NULL] = "null", | |
2898 | [EXEC_INPUT_TTY] = "tty", | |
2899 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
2900 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
2901 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
2902 | }; |
2903 | ||
8a0867d6 LP |
2904 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
2905 | ||
94f04347 | 2906 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 2907 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 2908 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 2909 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 2910 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 2911 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 2912 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 2913 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
2914 | [EXEC_OUTPUT_JOURNAL] = "journal", |
2915 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 2916 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
2917 | }; |
2918 | ||
2919 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); |