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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
034c6ed7 LP |
22 | #include <errno.h> |
23 | #include <fcntl.h> | |
24 | #include <unistd.h> | |
44d8db9e | 25 | #include <string.h> |
309bff19 | 26 | #include <signal.h> |
071830ff LP |
27 | #include <sys/socket.h> |
28 | #include <sys/un.h> | |
94f04347 | 29 | #include <sys/prctl.h> |
451a074f | 30 | #include <sys/stat.h> |
81a2b7ce | 31 | #include <grp.h> |
0a6f50c0 | 32 | #include <poll.h> |
2bef10ab | 33 | #include <glob.h> |
ac45f971 | 34 | #include <sys/personality.h> |
5cb5a6ff | 35 | |
5b6319dc LP |
36 | #ifdef HAVE_PAM |
37 | #include <security/pam_appl.h> | |
38 | #endif | |
39 | ||
7b52a628 MS |
40 | #ifdef HAVE_SELINUX |
41 | #include <selinux/selinux.h> | |
42 | #endif | |
43 | ||
17df7223 LP |
44 | #ifdef HAVE_SECCOMP |
45 | #include <seccomp.h> | |
46 | #endif | |
47 | ||
eef65bf3 MS |
48 | #ifdef HAVE_APPARMOR |
49 | #include <sys/apparmor.h> | |
50 | #endif | |
51 | ||
c6878637 | 52 | #include "rm-rf.h" |
5cb5a6ff LP |
53 | #include "execute.h" |
54 | #include "strv.h" | |
55 | #include "macro.h" | |
d7832d2c | 56 | #include "capability.h" |
5cb5a6ff | 57 | #include "util.h" |
acbb0225 | 58 | #include "log.h" |
20ad4cfd | 59 | #include "sd-messages.h" |
9eba9da4 | 60 | #include "ioprio.h" |
94f04347 | 61 | #include "securebits.h" |
15ae422b | 62 | #include "namespace.h" |
d06dacd0 | 63 | #include "exit-status.h" |
dd6c17b1 | 64 | #include "missing.h" |
169c1bda | 65 | #include "utmp-wtmp.h" |
f6a6225e | 66 | #include "def.h" |
9eb977db | 67 | #include "path-util.h" |
4d1a6904 | 68 | #include "env-util.h" |
a5c32cff | 69 | #include "fileio.h" |
4ad49000 | 70 | #include "unit.h" |
f485606b | 71 | #include "async.h" |
0d3f7bb3 | 72 | #include "selinux-util.h" |
17df7223 | 73 | #include "errno-list.h" |
4298d0b5 | 74 | #include "af-list.h" |
e66cf1a3 | 75 | #include "mkdir.h" |
2ca620c4 | 76 | #include "smack-util.h" |
3c70e3bb | 77 | #include "bus-endpoint.h" |
2822da4f | 78 | #include "cap-list.h" |
5cb5a6ff | 79 | |
2eec67ac TA |
80 | #ifdef HAVE_APPARMOR |
81 | #include "apparmor-util.h" | |
82 | #endif | |
83 | ||
57183d11 LP |
84 | #ifdef HAVE_SECCOMP |
85 | #include "seccomp-util.h" | |
86 | #endif | |
87 | ||
e056b01d | 88 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 89 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 90 | |
02a51aba LP |
91 | /* This assumes there is a 'tty' group */ |
92 | #define TTY_MODE 0620 | |
93 | ||
531dca78 LP |
94 | #define SNDBUF_SIZE (8*1024*1024) |
95 | ||
034c6ed7 LP |
96 | static int shift_fds(int fds[], unsigned n_fds) { |
97 | int start, restart_from; | |
98 | ||
99 | if (n_fds <= 0) | |
100 | return 0; | |
101 | ||
a0d40ac5 LP |
102 | /* Modifies the fds array! (sorts it) */ |
103 | ||
034c6ed7 LP |
104 | assert(fds); |
105 | ||
106 | start = 0; | |
107 | for (;;) { | |
108 | int i; | |
109 | ||
110 | restart_from = -1; | |
111 | ||
112 | for (i = start; i < (int) n_fds; i++) { | |
113 | int nfd; | |
114 | ||
115 | /* Already at right index? */ | |
116 | if (fds[i] == i+3) | |
117 | continue; | |
118 | ||
119 | if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0) | |
120 | return -errno; | |
121 | ||
03e334a1 | 122 | safe_close(fds[i]); |
034c6ed7 LP |
123 | fds[i] = nfd; |
124 | ||
125 | /* Hmm, the fd we wanted isn't free? Then | |
ee33e53a | 126 | * let's remember that and try again from here */ |
034c6ed7 LP |
127 | if (nfd != i+3 && restart_from < 0) |
128 | restart_from = i; | |
129 | } | |
130 | ||
131 | if (restart_from < 0) | |
132 | break; | |
133 | ||
134 | start = restart_from; | |
135 | } | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
c2748801 | 140 | static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) { |
47a71eed | 141 | unsigned i; |
e2c76839 | 142 | int r; |
47a71eed LP |
143 | |
144 | if (n_fds <= 0) | |
145 | return 0; | |
146 | ||
147 | assert(fds); | |
148 | ||
451a074f | 149 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */ |
47a71eed LP |
150 | |
151 | for (i = 0; i < n_fds; i++) { | |
47a71eed | 152 | |
e2c76839 LP |
153 | if ((r = fd_nonblock(fds[i], nonblock)) < 0) |
154 | return r; | |
47a71eed | 155 | |
451a074f LP |
156 | /* We unconditionally drop FD_CLOEXEC from the fds, |
157 | * since after all we want to pass these fds to our | |
158 | * children */ | |
47a71eed | 159 | |
e2c76839 LP |
160 | if ((r = fd_cloexec(fds[i], false)) < 0) |
161 | return r; | |
47a71eed LP |
162 | } |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
44a6b1b6 | 167 | _pure_ static const char *tty_path(const ExecContext *context) { |
80876c20 LP |
168 | assert(context); |
169 | ||
170 | if (context->tty_path) | |
171 | return context->tty_path; | |
172 | ||
173 | return "/dev/console"; | |
174 | } | |
175 | ||
9588bc32 | 176 | static void exec_context_tty_reset(const ExecContext *context) { |
6ea832a2 LP |
177 | assert(context); |
178 | ||
179 | if (context->tty_vhangup) | |
180 | terminal_vhangup(tty_path(context)); | |
181 | ||
182 | if (context->tty_reset) | |
183 | reset_terminal(tty_path(context)); | |
184 | ||
185 | if (context->tty_vt_disallocate && context->tty_path) | |
186 | vt_disallocate(context->tty_path); | |
187 | } | |
188 | ||
3a1286b6 MS |
189 | static bool is_terminal_output(ExecOutput o) { |
190 | return | |
191 | o == EXEC_OUTPUT_TTY || | |
192 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
193 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
194 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
195 | } | |
196 | ||
80876c20 LP |
197 | static int open_null_as(int flags, int nfd) { |
198 | int fd, r; | |
071830ff | 199 | |
80876c20 | 200 | assert(nfd >= 0); |
071830ff | 201 | |
613b411c LP |
202 | fd = open("/dev/null", flags|O_NOCTTY); |
203 | if (fd < 0) | |
071830ff LP |
204 | return -errno; |
205 | ||
80876c20 LP |
206 | if (fd != nfd) { |
207 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 208 | safe_close(fd); |
80876c20 LP |
209 | } else |
210 | r = nfd; | |
071830ff | 211 | |
80876c20 | 212 | return r; |
071830ff LP |
213 | } |
214 | ||
524daa8c | 215 | static int connect_journal_socket(int fd, uid_t uid, gid_t gid) { |
b92bea5d ZJS |
216 | union sockaddr_union sa = { |
217 | .un.sun_family = AF_UNIX, | |
218 | .un.sun_path = "/run/systemd/journal/stdout", | |
219 | }; | |
524daa8c ZJS |
220 | uid_t olduid = UID_INVALID; |
221 | gid_t oldgid = GID_INVALID; | |
222 | int r; | |
223 | ||
224 | if (gid != GID_INVALID) { | |
225 | oldgid = getgid(); | |
226 | ||
227 | r = setegid(gid); | |
228 | if (r < 0) | |
229 | return -errno; | |
230 | } | |
231 | ||
232 | if (uid != UID_INVALID) { | |
233 | olduid = getuid(); | |
234 | ||
235 | r = seteuid(uid); | |
236 | if (r < 0) { | |
237 | r = -errno; | |
238 | goto restore_gid; | |
239 | } | |
240 | } | |
241 | ||
242 | r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); | |
243 | if (r < 0) | |
244 | r = -errno; | |
245 | ||
246 | /* If we fail to restore the uid or gid, things will likely | |
247 | fail later on. This should only happen if an LSM interferes. */ | |
248 | ||
249 | if (uid != UID_INVALID) | |
250 | (void) seteuid(olduid); | |
251 | ||
252 | restore_gid: | |
253 | if (gid != GID_INVALID) | |
254 | (void) setegid(oldgid); | |
255 | ||
256 | return r; | |
257 | } | |
258 | ||
259 | 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) { | |
260 | int fd, r; | |
071830ff LP |
261 | |
262 | assert(context); | |
80876c20 LP |
263 | assert(output < _EXEC_OUTPUT_MAX); |
264 | assert(ident); | |
265 | assert(nfd >= 0); | |
071830ff | 266 | |
54fe0cdb LP |
267 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
268 | if (fd < 0) | |
80876c20 | 269 | return -errno; |
071830ff | 270 | |
524daa8c ZJS |
271 | r = connect_journal_socket(fd, uid, gid); |
272 | if (r < 0) | |
273 | return r; | |
071830ff | 274 | |
80876c20 | 275 | if (shutdown(fd, SHUT_RD) < 0) { |
03e334a1 | 276 | safe_close(fd); |
80876c20 LP |
277 | return -errno; |
278 | } | |
071830ff | 279 | |
531dca78 LP |
280 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
281 | ||
80876c20 | 282 | dprintf(fd, |
62bca2c6 | 283 | "%s\n" |
80876c20 LP |
284 | "%s\n" |
285 | "%i\n" | |
54fe0cdb LP |
286 | "%i\n" |
287 | "%i\n" | |
288 | "%i\n" | |
4f4a1dbf | 289 | "%i\n", |
4f4a1dbf | 290 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 291 | unit_id, |
54fe0cdb LP |
292 | context->syslog_priority, |
293 | !!context->syslog_level_prefix, | |
294 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
295 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 296 | is_terminal_output(output)); |
80876c20 LP |
297 | |
298 | if (fd != nfd) { | |
299 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 300 | safe_close(fd); |
80876c20 LP |
301 | } else |
302 | r = nfd; | |
071830ff | 303 | |
80876c20 LP |
304 | return r; |
305 | } | |
306 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
307 | int fd, r; | |
071830ff | 308 | |
80876c20 LP |
309 | assert(path); |
310 | assert(nfd >= 0); | |
071830ff | 311 | |
80876c20 LP |
312 | if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0) |
313 | return fd; | |
071830ff | 314 | |
80876c20 LP |
315 | if (fd != nfd) { |
316 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 317 | safe_close(fd); |
80876c20 LP |
318 | } else |
319 | r = nfd; | |
071830ff | 320 | |
80876c20 LP |
321 | return r; |
322 | } | |
071830ff | 323 | |
80876c20 LP |
324 | static bool is_terminal_input(ExecInput i) { |
325 | return | |
326 | i == EXEC_INPUT_TTY || | |
327 | i == EXEC_INPUT_TTY_FORCE || | |
328 | i == EXEC_INPUT_TTY_FAIL; | |
329 | } | |
071830ff | 330 | |
1e3ad081 LP |
331 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
332 | ||
333 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
334 | return EXEC_INPUT_NULL; | |
071830ff | 335 | |
03fd9c49 | 336 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
337 | return EXEC_INPUT_NULL; |
338 | ||
03fd9c49 | 339 | return std_input; |
4f2d528d LP |
340 | } |
341 | ||
03fd9c49 | 342 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 343 | |
03fd9c49 | 344 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
345 | return EXEC_OUTPUT_INHERIT; |
346 | ||
03fd9c49 | 347 | return std_output; |
4f2d528d LP |
348 | } |
349 | ||
1e3ad081 | 350 | static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) { |
4f2d528d LP |
351 | ExecInput i; |
352 | ||
353 | assert(context); | |
354 | ||
1e3ad081 | 355 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
4f2d528d LP |
356 | |
357 | switch (i) { | |
071830ff | 358 | |
80876c20 LP |
359 | case EXEC_INPUT_NULL: |
360 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
361 | ||
362 | case EXEC_INPUT_TTY: | |
363 | case EXEC_INPUT_TTY_FORCE: | |
364 | case EXEC_INPUT_TTY_FAIL: { | |
365 | int fd, r; | |
071830ff | 366 | |
970edce6 ZJS |
367 | fd = acquire_terminal(tty_path(context), |
368 | i == EXEC_INPUT_TTY_FAIL, | |
369 | i == EXEC_INPUT_TTY_FORCE, | |
370 | false, | |
3a43da28 | 371 | USEC_INFINITY); |
970edce6 | 372 | if (fd < 0) |
80876c20 LP |
373 | return fd; |
374 | ||
375 | if (fd != STDIN_FILENO) { | |
376 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
03e334a1 | 377 | safe_close(fd); |
80876c20 LP |
378 | } else |
379 | r = STDIN_FILENO; | |
380 | ||
381 | return r; | |
382 | } | |
383 | ||
4f2d528d LP |
384 | case EXEC_INPUT_SOCKET: |
385 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
386 | ||
80876c20 LP |
387 | default: |
388 | assert_not_reached("Unknown input type"); | |
389 | } | |
390 | } | |
391 | ||
524daa8c | 392 | 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 |
393 | ExecOutput o; |
394 | ExecInput i; | |
47c1d80d | 395 | int r; |
4f2d528d | 396 | |
80876c20 LP |
397 | assert(context); |
398 | assert(ident); | |
399 | ||
1e3ad081 | 400 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
03fd9c49 | 401 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 402 | |
eb17e935 MS |
403 | if (fileno == STDERR_FILENO) { |
404 | ExecOutput e; | |
405 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 406 | |
eb17e935 MS |
407 | /* This expects the input and output are already set up */ |
408 | ||
409 | /* Don't change the stderr file descriptor if we inherit all | |
410 | * the way and are not on a tty */ | |
411 | if (e == EXEC_OUTPUT_INHERIT && | |
412 | o == EXEC_OUTPUT_INHERIT && | |
413 | i == EXEC_INPUT_NULL && | |
414 | !is_terminal_input(context->std_input) && | |
415 | getppid () != 1) | |
416 | return fileno; | |
417 | ||
418 | /* Duplicate from stdout if possible */ | |
419 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
420 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 421 | |
eb17e935 | 422 | o = e; |
80876c20 | 423 | |
eb17e935 | 424 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
425 | /* If input got downgraded, inherit the original value */ |
426 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
eb17e935 | 427 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 428 | |
acb591e4 | 429 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 430 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 431 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 432 | |
acb591e4 LP |
433 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
434 | if (getppid() != 1) | |
eb17e935 | 435 | return fileno; |
94f04347 | 436 | |
eb17e935 MS |
437 | /* We need to open /dev/null here anew, to get the right access mode. */ |
438 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 439 | } |
94f04347 | 440 | |
eb17e935 | 441 | switch (o) { |
80876c20 LP |
442 | |
443 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 444 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
445 | |
446 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 447 | if (is_terminal_input(i)) |
eb17e935 | 448 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
449 | |
450 | /* We don't reset the terminal if this is just about output */ | |
eb17e935 | 451 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
452 | |
453 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 454 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 455 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 456 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
457 | case EXEC_OUTPUT_JOURNAL: |
458 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
524daa8c | 459 | r = connect_logger_as(context, o, ident, unit_id, fileno, uid, gid); |
47c1d80d | 460 | if (r < 0) { |
e2cc6eca | 461 | log_unit_struct(unit_id, |
524daa8c | 462 | LOG_ERR, |
e2cc6eca LP |
463 | LOG_MESSAGE("Failed to connect %s of %s to the journal socket: %s", |
464 | fileno == STDOUT_FILENO ? "stdout" : "stderr", | |
465 | unit_id, strerror(-r)), | |
466 | LOG_ERRNO(-r), | |
467 | NULL); | |
eb17e935 | 468 | r = open_null_as(O_WRONLY, fileno); |
47c1d80d MS |
469 | } |
470 | return r; | |
4f2d528d LP |
471 | |
472 | case EXEC_OUTPUT_SOCKET: | |
473 | assert(socket_fd >= 0); | |
eb17e935 | 474 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
475 | |
476 | default: | |
80876c20 | 477 | assert_not_reached("Unknown error type"); |
94f04347 | 478 | } |
071830ff LP |
479 | } |
480 | ||
02a51aba LP |
481 | static int chown_terminal(int fd, uid_t uid) { |
482 | struct stat st; | |
483 | ||
484 | assert(fd >= 0); | |
02a51aba LP |
485 | |
486 | /* This might fail. What matters are the results. */ | |
bab45044 LP |
487 | (void) fchown(fd, uid, -1); |
488 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
489 | |
490 | if (fstat(fd, &st) < 0) | |
491 | return -errno; | |
492 | ||
d8b4e2e9 | 493 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
494 | return -EPERM; |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
af6da548 | 499 | static int setup_confirm_stdio(int *_saved_stdin, |
80876c20 LP |
500 | int *_saved_stdout) { |
501 | int fd = -1, saved_stdin, saved_stdout = -1, r; | |
502 | ||
80876c20 LP |
503 | assert(_saved_stdin); |
504 | assert(_saved_stdout); | |
505 | ||
af6da548 LP |
506 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
507 | if (saved_stdin < 0) | |
508 | return -errno; | |
80876c20 | 509 | |
af6da548 LP |
510 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
511 | if (saved_stdout < 0) { | |
512 | r = errno; | |
80876c20 LP |
513 | goto fail; |
514 | } | |
515 | ||
af6da548 LP |
516 | fd = acquire_terminal( |
517 | "/dev/console", | |
518 | false, | |
519 | false, | |
520 | false, | |
521 | DEFAULT_CONFIRM_USEC); | |
522 | if (fd < 0) { | |
523 | r = fd; | |
80876c20 LP |
524 | goto fail; |
525 | } | |
526 | ||
af6da548 LP |
527 | r = chown_terminal(fd, getuid()); |
528 | if (r < 0) | |
02a51aba | 529 | goto fail; |
02a51aba | 530 | |
80876c20 | 531 | if (dup2(fd, STDIN_FILENO) < 0) { |
af6da548 | 532 | r = -errno; |
80876c20 LP |
533 | goto fail; |
534 | } | |
535 | ||
536 | if (dup2(fd, STDOUT_FILENO) < 0) { | |
af6da548 | 537 | r = -errno; |
80876c20 LP |
538 | goto fail; |
539 | } | |
540 | ||
541 | if (fd >= 2) | |
03e334a1 | 542 | safe_close(fd); |
80876c20 LP |
543 | |
544 | *_saved_stdin = saved_stdin; | |
545 | *_saved_stdout = saved_stdout; | |
546 | ||
547 | return 0; | |
548 | ||
549 | fail: | |
03e334a1 LP |
550 | safe_close(saved_stdout); |
551 | safe_close(saved_stdin); | |
552 | safe_close(fd); | |
80876c20 LP |
553 | |
554 | return r; | |
555 | } | |
556 | ||
44b601bc | 557 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
03e334a1 | 558 | _cleanup_close_ int fd = -1; |
af6da548 | 559 | va_list ap; |
80876c20 | 560 | |
af6da548 | 561 | assert(format); |
80876c20 | 562 | |
af6da548 LP |
563 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
564 | if (fd < 0) | |
565 | return fd; | |
80876c20 | 566 | |
af6da548 LP |
567 | va_start(ap, format); |
568 | vdprintf(fd, format, ap); | |
569 | va_end(ap); | |
80876c20 | 570 | |
af6da548 LP |
571 | return 0; |
572 | } | |
80876c20 | 573 | |
af6da548 LP |
574 | static int restore_confirm_stdio(int *saved_stdin, |
575 | int *saved_stdout) { | |
80876c20 | 576 | |
af6da548 | 577 | int r = 0; |
80876c20 | 578 | |
af6da548 LP |
579 | assert(saved_stdin); |
580 | assert(saved_stdout); | |
581 | ||
582 | release_terminal(); | |
583 | ||
584 | if (*saved_stdin >= 0) | |
80876c20 | 585 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 586 | r = -errno; |
80876c20 | 587 | |
af6da548 | 588 | if (*saved_stdout >= 0) |
80876c20 | 589 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 590 | r = -errno; |
80876c20 | 591 | |
03e334a1 LP |
592 | safe_close(*saved_stdin); |
593 | safe_close(*saved_stdout); | |
af6da548 LP |
594 | |
595 | return r; | |
596 | } | |
597 | ||
598 | static int ask_for_confirmation(char *response, char **argv) { | |
599 | int saved_stdout = -1, saved_stdin = -1, r; | |
e1d75803 | 600 | _cleanup_free_ char *line = NULL; |
af6da548 LP |
601 | |
602 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
603 | if (r < 0) | |
604 | return r; | |
605 | ||
606 | line = exec_command_line(argv); | |
607 | if (!line) | |
608 | return -ENOMEM; | |
609 | ||
418b9be5 | 610 | r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line); |
af6da548 LP |
611 | |
612 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
613 | ||
614 | return r; | |
80876c20 LP |
615 | } |
616 | ||
81a2b7ce LP |
617 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
618 | bool keep_groups = false; | |
619 | int r; | |
620 | ||
621 | assert(context); | |
622 | ||
35b8ca3a | 623 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
624 | * we avoid NSS lookups for gid=0. */ |
625 | ||
626 | if (context->group || username) { | |
627 | ||
4b67834e LP |
628 | if (context->group) { |
629 | const char *g = context->group; | |
630 | ||
631 | if ((r = get_group_creds(&g, &gid)) < 0) | |
81a2b7ce | 632 | return r; |
4b67834e | 633 | } |
81a2b7ce LP |
634 | |
635 | /* First step, initialize groups from /etc/groups */ | |
636 | if (username && gid != 0) { | |
637 | if (initgroups(username, gid) < 0) | |
638 | return -errno; | |
639 | ||
640 | keep_groups = true; | |
641 | } | |
642 | ||
643 | /* Second step, set our gids */ | |
644 | if (setresgid(gid, gid, gid) < 0) | |
645 | return -errno; | |
646 | } | |
647 | ||
648 | if (context->supplementary_groups) { | |
649 | int ngroups_max, k; | |
650 | gid_t *gids; | |
651 | char **i; | |
652 | ||
653 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 654 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
655 | |
656 | if (!(gids = new(gid_t, ngroups_max))) | |
657 | return -ENOMEM; | |
658 | ||
659 | if (keep_groups) { | |
660 | if ((k = getgroups(ngroups_max, gids)) < 0) { | |
661 | free(gids); | |
662 | return -errno; | |
663 | } | |
664 | } else | |
665 | k = 0; | |
666 | ||
667 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 668 | const char *g; |
81a2b7ce LP |
669 | |
670 | if (k >= ngroups_max) { | |
671 | free(gids); | |
672 | return -E2BIG; | |
673 | } | |
674 | ||
4b67834e LP |
675 | g = *i; |
676 | r = get_group_creds(&g, gids+k); | |
677 | if (r < 0) { | |
81a2b7ce LP |
678 | free(gids); |
679 | return r; | |
680 | } | |
681 | ||
682 | k++; | |
683 | } | |
684 | ||
685 | if (setgroups(k, gids) < 0) { | |
686 | free(gids); | |
687 | return -errno; | |
688 | } | |
689 | ||
690 | free(gids); | |
691 | } | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
81a2b7ce LP |
697 | assert(context); |
698 | ||
699 | /* Sets (but doesn't lookup) the uid and make sure we keep the | |
700 | * capabilities while doing so. */ | |
701 | ||
702 | if (context->capabilities) { | |
5ce70e5b | 703 | _cleanup_cap_free_ cap_t d = NULL; |
81a2b7ce LP |
704 | static const cap_value_t bits[] = { |
705 | CAP_SETUID, /* Necessary so that we can run setresuid() below */ | |
706 | CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */ | |
707 | }; | |
708 | ||
709 | /* First step: If we need to keep capabilities but | |
710 | * drop privileges we need to make sure we keep our | |
cbb21cca | 711 | * caps, while we drop privileges. */ |
693ced48 | 712 | if (uid != 0) { |
cbb21cca | 713 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
714 | |
715 | if (prctl(PR_GET_SECUREBITS) != sb) | |
716 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
717 | return -errno; | |
718 | } | |
81a2b7ce | 719 | |
35b8ca3a | 720 | /* Second step: set the capabilities. This will reduce |
81a2b7ce LP |
721 | * the capabilities to the minimum we need. */ |
722 | ||
5ce70e5b ZJS |
723 | d = cap_dup(context->capabilities); |
724 | if (!d) | |
81a2b7ce LP |
725 | return -errno; |
726 | ||
727 | if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 || | |
5ce70e5b ZJS |
728 | cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) |
729 | return -errno; | |
81a2b7ce | 730 | |
5ce70e5b ZJS |
731 | if (cap_set_proc(d) < 0) |
732 | return -errno; | |
81a2b7ce LP |
733 | } |
734 | ||
735 | /* Third step: actually set the uids */ | |
736 | if (setresuid(uid, uid, uid) < 0) | |
737 | return -errno; | |
738 | ||
739 | /* At this point we should have all necessary capabilities but | |
740 | are otherwise a normal user. However, the caps might got | |
741 | corrupted due to the setresuid() so we need clean them up | |
742 | later. This is done outside of this call. */ | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
5b6319dc LP |
747 | #ifdef HAVE_PAM |
748 | ||
749 | static int null_conv( | |
750 | int num_msg, | |
751 | const struct pam_message **msg, | |
752 | struct pam_response **resp, | |
753 | void *appdata_ptr) { | |
754 | ||
755 | /* We don't support conversations */ | |
756 | ||
757 | return PAM_CONV_ERR; | |
758 | } | |
759 | ||
760 | static int setup_pam( | |
761 | const char *name, | |
762 | const char *user, | |
940c5210 | 763 | uid_t uid, |
5b6319dc LP |
764 | const char *tty, |
765 | char ***pam_env, | |
766 | int fds[], unsigned n_fds) { | |
767 | ||
768 | static const struct pam_conv conv = { | |
769 | .conv = null_conv, | |
770 | .appdata_ptr = NULL | |
771 | }; | |
772 | ||
773 | pam_handle_t *handle = NULL; | |
774 | sigset_t ss, old_ss; | |
775 | int pam_code = PAM_SUCCESS; | |
9ba35398 | 776 | int err; |
5b6319dc LP |
777 | char **e = NULL; |
778 | bool close_session = false; | |
779 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 780 | int flags = 0; |
5b6319dc LP |
781 | |
782 | assert(name); | |
783 | assert(user); | |
784 | assert(pam_env); | |
785 | ||
786 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 787 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
788 | * systemd via the cgroup logic. It will then remove the PAM |
789 | * session again. The parent process will exec() the actual | |
790 | * daemon. We do things this way to ensure that the main PID | |
791 | * of the daemon is the one we initially fork()ed. */ | |
792 | ||
553d2243 | 793 | if (log_get_max_level() < LOG_DEBUG) |
970edce6 ZJS |
794 | flags |= PAM_SILENT; |
795 | ||
f546241b ZJS |
796 | pam_code = pam_start(name, user, &conv, &handle); |
797 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
798 | handle = NULL; |
799 | goto fail; | |
800 | } | |
801 | ||
f546241b ZJS |
802 | if (tty) { |
803 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
804 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 805 | goto fail; |
f546241b | 806 | } |
5b6319dc | 807 | |
970edce6 | 808 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 809 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
810 | goto fail; |
811 | ||
970edce6 | 812 | pam_code = pam_open_session(handle, flags); |
f546241b | 813 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
814 | goto fail; |
815 | ||
816 | close_session = true; | |
817 | ||
f546241b ZJS |
818 | e = pam_getenvlist(handle); |
819 | if (!e) { | |
5b6319dc LP |
820 | pam_code = PAM_BUF_ERR; |
821 | goto fail; | |
822 | } | |
823 | ||
824 | /* Block SIGTERM, so that we know that it won't get lost in | |
825 | * the child */ | |
826 | if (sigemptyset(&ss) < 0 || | |
827 | sigaddset(&ss, SIGTERM) < 0 || | |
828 | sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0) | |
829 | goto fail; | |
830 | ||
831 | parent_pid = getpid(); | |
832 | ||
f546241b ZJS |
833 | pam_pid = fork(); |
834 | if (pam_pid < 0) | |
5b6319dc LP |
835 | goto fail; |
836 | ||
837 | if (pam_pid == 0) { | |
838 | int sig; | |
839 | int r = EXIT_PAM; | |
840 | ||
841 | /* The child's job is to reset the PAM session on | |
842 | * termination */ | |
843 | ||
844 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
845 | * of "/sbin/init"), to look pretty in /bin/ps */ |
846 | rename_process("(sd-pam)"); | |
5b6319dc LP |
847 | |
848 | /* Make sure we don't keep open the passed fds in this | |
849 | child. We assume that otherwise only those fds are | |
850 | open here that have been opened by PAM. */ | |
851 | close_many(fds, n_fds); | |
852 | ||
940c5210 AK |
853 | /* Drop privileges - we don't need any to pam_close_session |
854 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
855 | * If this fails, ignore the error - but expect sd-pam threads | |
856 | * to fail to exit normally */ | |
857 | if (setresuid(uid, uid, uid) < 0) | |
da927ba9 | 858 | log_error_errno(r, "Error: Failed to setresuid() in sd-pam: %m"); |
940c5210 AK |
859 | |
860 | /* Wait until our parent died. This will only work if | |
861 | * the above setresuid() succeeds, otherwise the kernel | |
862 | * will not allow unprivileged parents kill their privileged | |
863 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
864 | * to do the rest for us. */ |
865 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
866 | goto child_finish; | |
867 | ||
868 | /* Check if our parent process might already have | |
869 | * died? */ | |
870 | if (getppid() == parent_pid) { | |
3dead8d9 LP |
871 | for (;;) { |
872 | if (sigwait(&ss, &sig) < 0) { | |
873 | if (errno == EINTR) | |
874 | continue; | |
875 | ||
876 | goto child_finish; | |
877 | } | |
5b6319dc | 878 | |
3dead8d9 LP |
879 | assert(sig == SIGTERM); |
880 | break; | |
881 | } | |
5b6319dc LP |
882 | } |
883 | ||
3dead8d9 | 884 | /* If our parent died we'll end the session */ |
f546241b | 885 | if (getppid() != parent_pid) { |
970edce6 | 886 | pam_code = pam_close_session(handle, flags); |
f546241b | 887 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 888 | goto child_finish; |
f546241b | 889 | } |
5b6319dc LP |
890 | |
891 | r = 0; | |
892 | ||
893 | child_finish: | |
970edce6 | 894 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
895 | _exit(r); |
896 | } | |
897 | ||
898 | /* If the child was forked off successfully it will do all the | |
899 | * cleanups, so forget about the handle here. */ | |
900 | handle = NULL; | |
901 | ||
3b8bddde | 902 | /* Unblock SIGTERM again in the parent */ |
5b6319dc LP |
903 | if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0) |
904 | goto fail; | |
905 | ||
906 | /* We close the log explicitly here, since the PAM modules | |
907 | * might have opened it, but we don't want this fd around. */ | |
908 | closelog(); | |
909 | ||
aa87e624 LP |
910 | *pam_env = e; |
911 | e = NULL; | |
912 | ||
5b6319dc LP |
913 | return 0; |
914 | ||
915 | fail: | |
970edce6 ZJS |
916 | if (pam_code != PAM_SUCCESS) { |
917 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
9ba35398 | 918 | err = -EPERM; /* PAM errors do not map to errno */ |
970edce6 | 919 | } else { |
56f64d95 | 920 | log_error_errno(errno, "PAM failed: %m"); |
9ba35398 | 921 | err = -errno; |
970edce6 | 922 | } |
9ba35398 | 923 | |
5b6319dc LP |
924 | if (handle) { |
925 | if (close_session) | |
970edce6 | 926 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 927 | |
970edce6 | 928 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
929 | } |
930 | ||
931 | strv_free(e); | |
932 | ||
933 | closelog(); | |
934 | ||
430c18ed | 935 | if (pam_pid > 1) { |
5b6319dc | 936 | kill(pam_pid, SIGTERM); |
430c18ed LP |
937 | kill(pam_pid, SIGCONT); |
938 | } | |
5b6319dc | 939 | |
9ba35398 | 940 | return err; |
5b6319dc LP |
941 | } |
942 | #endif | |
943 | ||
5d6b1584 LP |
944 | static void rename_process_from_path(const char *path) { |
945 | char process_name[11]; | |
946 | const char *p; | |
947 | size_t l; | |
948 | ||
949 | /* This resulting string must fit in 10 chars (i.e. the length | |
950 | * of "/sbin/init") to look pretty in /bin/ps */ | |
951 | ||
2b6bf07d | 952 | p = basename(path); |
5d6b1584 LP |
953 | if (isempty(p)) { |
954 | rename_process("(...)"); | |
955 | return; | |
956 | } | |
957 | ||
958 | l = strlen(p); | |
959 | if (l > 8) { | |
960 | /* The end of the process name is usually more | |
961 | * interesting, since the first bit might just be | |
962 | * "systemd-" */ | |
963 | p = p + l - 8; | |
964 | l = 8; | |
965 | } | |
966 | ||
967 | process_name[0] = '('; | |
968 | memcpy(process_name+1, p, l); | |
969 | process_name[1+l] = ')'; | |
970 | process_name[1+l+1] = 0; | |
971 | ||
972 | rename_process(process_name); | |
973 | } | |
974 | ||
c0467cf3 | 975 | #ifdef HAVE_SECCOMP |
17df7223 | 976 | |
822a5960 | 977 | static int apply_seccomp(const ExecContext *c) { |
17df7223 LP |
978 | uint32_t negative_action, action; |
979 | scmp_filter_ctx *seccomp; | |
c0467cf3 RC |
980 | Iterator i; |
981 | void *id; | |
17df7223 | 982 | int r; |
8351ceae | 983 | |
c0467cf3 | 984 | assert(c); |
8351ceae | 985 | |
17df7223 LP |
986 | negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); |
987 | ||
988 | seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); | |
989 | if (!seccomp) | |
990 | return -ENOMEM; | |
8351ceae | 991 | |
e9642be2 LP |
992 | if (c->syscall_archs) { |
993 | ||
994 | SET_FOREACH(id, c->syscall_archs, i) { | |
995 | r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); | |
996 | if (r == -EEXIST) | |
997 | continue; | |
7c66bae2 LP |
998 | if (r < 0) |
999 | goto finish; | |
e9642be2 | 1000 | } |
e9642be2 | 1001 | |
7c66bae2 | 1002 | } else { |
e9642be2 | 1003 | r = seccomp_add_secondary_archs(seccomp); |
7c66bae2 LP |
1004 | if (r < 0) |
1005 | goto finish; | |
57183d11 | 1006 | } |
8351ceae | 1007 | |
57183d11 | 1008 | action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action; |
17df7223 LP |
1009 | SET_FOREACH(id, c->syscall_filter, i) { |
1010 | r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0); | |
7c66bae2 LP |
1011 | if (r < 0) |
1012 | goto finish; | |
c0467cf3 | 1013 | } |
8351ceae | 1014 | |
7c66bae2 LP |
1015 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); |
1016 | if (r < 0) | |
1017 | goto finish; | |
1018 | ||
17df7223 | 1019 | r = seccomp_load(seccomp); |
7c66bae2 LP |
1020 | |
1021 | finish: | |
17df7223 | 1022 | seccomp_release(seccomp); |
4298d0b5 LP |
1023 | return r; |
1024 | } | |
1025 | ||
822a5960 | 1026 | static int apply_address_families(const ExecContext *c) { |
4298d0b5 LP |
1027 | scmp_filter_ctx *seccomp; |
1028 | Iterator i; | |
1029 | int r; | |
1030 | ||
1031 | assert(c); | |
1032 | ||
1033 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1034 | if (!seccomp) | |
1035 | return -ENOMEM; | |
1036 | ||
1037 | r = seccomp_add_secondary_archs(seccomp); | |
1038 | if (r < 0) | |
1039 | goto finish; | |
1040 | ||
1041 | if (c->address_families_whitelist) { | |
1042 | int af, first = 0, last = 0; | |
1043 | void *afp; | |
1044 | ||
1045 | /* If this is a whitelist, we first block the address | |
1046 | * families that are out of range and then everything | |
1047 | * that is not in the set. First, we find the lowest | |
1048 | * and highest address family in the set. */ | |
1049 | ||
1050 | SET_FOREACH(afp, c->address_families, i) { | |
1051 | af = PTR_TO_INT(afp); | |
17df7223 | 1052 | |
4298d0b5 LP |
1053 | if (af <= 0 || af >= af_max()) |
1054 | continue; | |
1055 | ||
1056 | if (first == 0 || af < first) | |
1057 | first = af; | |
1058 | ||
1059 | if (last == 0 || af > last) | |
1060 | last = af; | |
1061 | } | |
1062 | ||
1063 | assert((first == 0) == (last == 0)); | |
1064 | ||
1065 | if (first == 0) { | |
1066 | ||
1067 | /* No entries in the valid range, block everything */ | |
1068 | r = seccomp_rule_add( | |
1069 | seccomp, | |
1070 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1071 | SCMP_SYS(socket), | |
1072 | 0); | |
1073 | if (r < 0) | |
1074 | goto finish; | |
1075 | ||
1076 | } else { | |
1077 | ||
1078 | /* Block everything below the first entry */ | |
1079 | r = seccomp_rule_add( | |
1080 | seccomp, | |
1081 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1082 | SCMP_SYS(socket), | |
1083 | 1, | |
1084 | SCMP_A0(SCMP_CMP_LT, first)); | |
1085 | if (r < 0) | |
1086 | goto finish; | |
1087 | ||
1088 | /* Block everything above the last entry */ | |
1089 | r = seccomp_rule_add( | |
1090 | seccomp, | |
1091 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1092 | SCMP_SYS(socket), | |
1093 | 1, | |
1094 | SCMP_A0(SCMP_CMP_GT, last)); | |
1095 | if (r < 0) | |
1096 | goto finish; | |
1097 | ||
1098 | /* Block everything between the first and last | |
1099 | * entry */ | |
1100 | for (af = 1; af < af_max(); af++) { | |
1101 | ||
1102 | if (set_contains(c->address_families, INT_TO_PTR(af))) | |
1103 | continue; | |
1104 | ||
1105 | r = seccomp_rule_add( | |
1106 | seccomp, | |
1107 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1108 | SCMP_SYS(socket), | |
1109 | 1, | |
1110 | SCMP_A0(SCMP_CMP_EQ, af)); | |
1111 | if (r < 0) | |
1112 | goto finish; | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | } else { | |
1117 | void *af; | |
1118 | ||
1119 | /* If this is a blacklist, then generate one rule for | |
1120 | * each address family that are then combined in OR | |
1121 | * checks. */ | |
1122 | ||
1123 | SET_FOREACH(af, c->address_families, i) { | |
1124 | ||
1125 | r = seccomp_rule_add( | |
1126 | seccomp, | |
1127 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1128 | SCMP_SYS(socket), | |
1129 | 1, | |
1130 | SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af))); | |
1131 | if (r < 0) | |
1132 | goto finish; | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1137 | if (r < 0) | |
1138 | goto finish; | |
1139 | ||
1140 | r = seccomp_load(seccomp); | |
1141 | ||
1142 | finish: | |
1143 | seccomp_release(seccomp); | |
17df7223 | 1144 | return r; |
8351ceae | 1145 | } |
4298d0b5 | 1146 | |
c0467cf3 | 1147 | #endif |
8351ceae | 1148 | |
31a7eb86 ZJS |
1149 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
1150 | assert(idle_pipe); | |
1151 | ||
03e334a1 LP |
1152 | |
1153 | safe_close(idle_pipe[1]); | |
1154 | safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1155 | |
1156 | if (idle_pipe[0] >= 0) { | |
1157 | int r; | |
1158 | ||
1159 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1160 | ||
1161 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
1162 | /* Signal systemd that we are bored and want to continue. */ | |
cd972d69 ZJS |
1163 | r = write(idle_pipe[3], "x", 1); |
1164 | if (r > 0) | |
1165 | /* Wait for systemd to react to the signal above. */ | |
1166 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
31a7eb86 ZJS |
1167 | } |
1168 | ||
03e334a1 | 1169 | safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1170 | |
1171 | } | |
1172 | ||
03e334a1 | 1173 | safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1174 | } |
1175 | ||
7cae38c4 | 1176 | static int build_environment( |
9fa95f85 | 1177 | const ExecContext *c, |
7cae38c4 | 1178 | unsigned n_fds, |
09812eb7 | 1179 | usec_t watchdog_usec, |
7cae38c4 LP |
1180 | const char *home, |
1181 | const char *username, | |
1182 | const char *shell, | |
1183 | char ***ret) { | |
1184 | ||
1185 | _cleanup_strv_free_ char **our_env = NULL; | |
1186 | unsigned n_env = 0; | |
1187 | char *x; | |
1188 | ||
1189 | assert(c); | |
1190 | assert(ret); | |
1191 | ||
09812eb7 | 1192 | our_env = new0(char*, 10); |
7cae38c4 LP |
1193 | if (!our_env) |
1194 | return -ENOMEM; | |
1195 | ||
1196 | if (n_fds > 0) { | |
ccd06097 | 1197 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0) |
7cae38c4 LP |
1198 | return -ENOMEM; |
1199 | our_env[n_env++] = x; | |
1200 | ||
1201 | if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0) | |
1202 | return -ENOMEM; | |
1203 | our_env[n_env++] = x; | |
1204 | } | |
1205 | ||
09812eb7 | 1206 | if (watchdog_usec > 0) { |
ccd06097 | 1207 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0) |
09812eb7 LP |
1208 | return -ENOMEM; |
1209 | our_env[n_env++] = x; | |
1210 | ||
de0671ee | 1211 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, watchdog_usec) < 0) |
09812eb7 LP |
1212 | return -ENOMEM; |
1213 | our_env[n_env++] = x; | |
1214 | } | |
1215 | ||
7cae38c4 LP |
1216 | if (home) { |
1217 | x = strappend("HOME=", home); | |
1218 | if (!x) | |
1219 | return -ENOMEM; | |
1220 | our_env[n_env++] = x; | |
1221 | } | |
1222 | ||
1223 | if (username) { | |
1224 | x = strappend("LOGNAME=", username); | |
1225 | if (!x) | |
1226 | return -ENOMEM; | |
1227 | our_env[n_env++] = x; | |
1228 | ||
1229 | x = strappend("USER=", username); | |
1230 | if (!x) | |
1231 | return -ENOMEM; | |
1232 | our_env[n_env++] = x; | |
1233 | } | |
1234 | ||
1235 | if (shell) { | |
1236 | x = strappend("SHELL=", shell); | |
1237 | if (!x) | |
1238 | return -ENOMEM; | |
1239 | our_env[n_env++] = x; | |
1240 | } | |
1241 | ||
1242 | if (is_terminal_input(c->std_input) || | |
1243 | c->std_output == EXEC_OUTPUT_TTY || | |
1244 | c->std_error == EXEC_OUTPUT_TTY || | |
1245 | c->tty_path) { | |
1246 | ||
1247 | x = strdup(default_term_for_tty(tty_path(c))); | |
1248 | if (!x) | |
1249 | return -ENOMEM; | |
1250 | our_env[n_env++] = x; | |
1251 | } | |
1252 | ||
1253 | our_env[n_env++] = NULL; | |
09812eb7 | 1254 | assert(n_env <= 10); |
7cae38c4 LP |
1255 | |
1256 | *ret = our_env; | |
1257 | our_env = NULL; | |
1258 | ||
1259 | return 0; | |
1260 | } | |
1261 | ||
ff0af2a1 LP |
1262 | static int exec_child( |
1263 | ExecCommand *command, | |
1264 | const ExecContext *context, | |
1265 | const ExecParameters *params, | |
1266 | ExecRuntime *runtime, | |
1267 | char **argv, | |
1268 | int socket_fd, | |
1269 | int *fds, unsigned n_fds, | |
1270 | char **files_env, | |
1271 | int *exit_status) { | |
d35fbf6b DM |
1272 | |
1273 | _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL; | |
9008e1ac | 1274 | _cleanup_free_ char *mac_selinux_context_net = NULL; |
d35fbf6b DM |
1275 | const char *username = NULL, *home = NULL, *shell = NULL; |
1276 | unsigned n_dont_close = 0; | |
e44da745 | 1277 | int dont_close[n_fds + 4]; |
fed1e721 LP |
1278 | uid_t uid = UID_INVALID; |
1279 | gid_t gid = GID_INVALID; | |
ff0af2a1 | 1280 | int i, r; |
034c6ed7 | 1281 | |
5cb5a6ff LP |
1282 | assert(command); |
1283 | assert(context); | |
d35fbf6b | 1284 | assert(params); |
ff0af2a1 | 1285 | assert(exit_status); |
d35fbf6b DM |
1286 | |
1287 | rename_process_from_path(command->path); | |
1288 | ||
1289 | /* We reset exactly these signals, since they are the | |
1290 | * only ones we set to SIG_IGN in the main daemon. All | |
1291 | * others we leave untouched because we set them to | |
1292 | * SIG_DFL or a valid handler initially, both of which | |
1293 | * will be demoted to SIG_DFL. */ | |
1294 | default_signals(SIGNALS_CRASH_HANDLER, | |
1295 | SIGNALS_IGNORE, -1); | |
1296 | ||
1297 | if (context->ignore_sigpipe) | |
1298 | ignore_signals(SIGPIPE, -1); | |
1299 | ||
ff0af2a1 LP |
1300 | r = reset_signal_mask(); |
1301 | if (r < 0) { | |
1302 | *exit_status = EXIT_SIGNAL_MASK; | |
1303 | return r; | |
d35fbf6b | 1304 | } |
034c6ed7 | 1305 | |
d35fbf6b DM |
1306 | if (params->idle_pipe) |
1307 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 1308 | |
d35fbf6b DM |
1309 | /* Close sockets very early to make sure we don't |
1310 | * block init reexecution because it cannot bind its | |
1311 | * sockets */ | |
ff0af2a1 | 1312 | |
d35fbf6b | 1313 | log_forget_fds(); |
4f2d528d | 1314 | |
d35fbf6b DM |
1315 | if (socket_fd >= 0) |
1316 | dont_close[n_dont_close++] = socket_fd; | |
1317 | if (n_fds > 0) { | |
1318 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
1319 | n_dont_close += n_fds; | |
1320 | } | |
e44da745 DM |
1321 | if (params->bus_endpoint_fd >= 0) |
1322 | dont_close[n_dont_close++] = params->bus_endpoint_fd; | |
d35fbf6b DM |
1323 | if (runtime) { |
1324 | if (runtime->netns_storage_socket[0] >= 0) | |
1325 | dont_close[n_dont_close++] = runtime->netns_storage_socket[0]; | |
1326 | if (runtime->netns_storage_socket[1] >= 0) | |
1327 | dont_close[n_dont_close++] = runtime->netns_storage_socket[1]; | |
9fa95f85 | 1328 | } |
4f2d528d | 1329 | |
ff0af2a1 LP |
1330 | r = close_all_fds(dont_close, n_dont_close); |
1331 | if (r < 0) { | |
1332 | *exit_status = EXIT_FDS; | |
1333 | return r; | |
8c7be95e LP |
1334 | } |
1335 | ||
d35fbf6b DM |
1336 | if (!context->same_pgrp) |
1337 | if (setsid() < 0) { | |
ff0af2a1 | 1338 | *exit_status = EXIT_SETSID; |
d35fbf6b DM |
1339 | return -errno; |
1340 | } | |
9e2f7c11 | 1341 | |
d35fbf6b DM |
1342 | exec_context_tty_reset(context); |
1343 | ||
1344 | if (params->confirm_spawn) { | |
1345 | char response; | |
1346 | ||
ff0af2a1 LP |
1347 | r = ask_for_confirmation(&response, argv); |
1348 | if (r == -ETIMEDOUT) | |
d35fbf6b | 1349 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); |
ff0af2a1 LP |
1350 | else if (r < 0) |
1351 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-r)); | |
d35fbf6b DM |
1352 | else if (response == 's') { |
1353 | write_confirm_message("Skipping execution.\n"); | |
ff0af2a1 | 1354 | *exit_status = EXIT_CONFIRM; |
d35fbf6b DM |
1355 | return -ECANCELED; |
1356 | } else if (response == 'n') { | |
1357 | write_confirm_message("Failing execution.\n"); | |
ff0af2a1 | 1358 | *exit_status = 0; |
d35fbf6b DM |
1359 | return 0; |
1360 | } | |
1361 | } | |
1a63a750 | 1362 | |
524daa8c ZJS |
1363 | if (context->user) { |
1364 | username = context->user; | |
ff0af2a1 LP |
1365 | r = get_user_creds(&username, &uid, &gid, &home, &shell); |
1366 | if (r < 0) { | |
1367 | *exit_status = EXIT_USER; | |
1368 | return r; | |
524daa8c ZJS |
1369 | } |
1370 | } | |
1371 | ||
d35fbf6b DM |
1372 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1373 | * must sure to drop O_NONBLOCK */ | |
1374 | if (socket_fd >= 0) | |
1375 | fd_nonblock(socket_fd, false); | |
acbb0225 | 1376 | |
ff0af2a1 LP |
1377 | r = setup_input(context, socket_fd, params->apply_tty_stdin); |
1378 | if (r < 0) { | |
1379 | *exit_status = EXIT_STDIN; | |
1380 | return r; | |
d35fbf6b | 1381 | } |
034c6ed7 | 1382 | |
ff0af2a1 LP |
1383 | r = setup_output(context, STDOUT_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin, uid, gid); |
1384 | if (r < 0) { | |
1385 | *exit_status = EXIT_STDOUT; | |
1386 | return r; | |
d35fbf6b DM |
1387 | } |
1388 | ||
ff0af2a1 LP |
1389 | r = setup_output(context, STDERR_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin, uid, gid); |
1390 | if (r < 0) { | |
1391 | *exit_status = EXIT_STDERR; | |
1392 | return r; | |
d35fbf6b DM |
1393 | } |
1394 | ||
1395 | if (params->cgroup_path) { | |
ff0af2a1 LP |
1396 | r = cg_attach_everywhere(params->cgroup_supported, params->cgroup_path, 0, NULL, NULL); |
1397 | if (r < 0) { | |
1398 | *exit_status = EXIT_CGROUP; | |
1399 | return r; | |
309bff19 | 1400 | } |
d35fbf6b | 1401 | } |
309bff19 | 1402 | |
d35fbf6b | 1403 | if (context->oom_score_adjust_set) { |
d5243d62 | 1404 | char t[DECIMAL_STR_MAX(context->oom_score_adjust)]; |
f2b68789 | 1405 | |
d5243d62 LP |
1406 | /* When we can't make this change due to EPERM, then |
1407 | * let's silently skip over it. User namespaces | |
1408 | * prohibit write access to this file, and we | |
1409 | * shouldn't trip up over that. */ | |
613b411c | 1410 | |
d5243d62 | 1411 | sprintf(t, "%i", context->oom_score_adjust); |
ff0af2a1 | 1412 | r = write_string_file("/proc/self/oom_score_adj", t); |
6cb7fa17 | 1413 | if (r == -EPERM || r == -EACCES) { |
ff0af2a1 LP |
1414 | log_open(); |
1415 | log_unit_debug_errno(params->unit_id, r, "Failed to adjust OOM setting, assuming containerized execution, ignoring: %m"); | |
1416 | log_close(); | |
1417 | } else if (r < 0) { | |
1418 | *exit_status = EXIT_OOM_ADJUST; | |
d35fbf6b | 1419 | return -errno; |
613b411c | 1420 | } |
d35fbf6b DM |
1421 | } |
1422 | ||
1423 | if (context->nice_set) | |
1424 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
ff0af2a1 | 1425 | *exit_status = EXIT_NICE; |
d35fbf6b | 1426 | return -errno; |
613b411c LP |
1427 | } |
1428 | ||
d35fbf6b DM |
1429 | if (context->cpu_sched_set) { |
1430 | struct sched_param param = { | |
1431 | .sched_priority = context->cpu_sched_priority, | |
1432 | }; | |
1433 | ||
ff0af2a1 LP |
1434 | r = sched_setscheduler(0, |
1435 | context->cpu_sched_policy | | |
1436 | (context->cpu_sched_reset_on_fork ? | |
1437 | SCHED_RESET_ON_FORK : 0), | |
1438 | ¶m); | |
1439 | if (r < 0) { | |
1440 | *exit_status = EXIT_SETSCHEDULER; | |
d35fbf6b | 1441 | return -errno; |
fc9b2a84 | 1442 | } |
d35fbf6b | 1443 | } |
fc9b2a84 | 1444 | |
d35fbf6b DM |
1445 | if (context->cpuset) |
1446 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
ff0af2a1 | 1447 | *exit_status = EXIT_CPUAFFINITY; |
d35fbf6b | 1448 | return -errno; |
034c6ed7 LP |
1449 | } |
1450 | ||
d35fbf6b DM |
1451 | if (context->ioprio_set) |
1452 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
ff0af2a1 | 1453 | *exit_status = EXIT_IOPRIO; |
d35fbf6b DM |
1454 | return -errno; |
1455 | } | |
da726a4d | 1456 | |
d35fbf6b DM |
1457 | if (context->timer_slack_nsec != NSEC_INFINITY) |
1458 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
ff0af2a1 | 1459 | *exit_status = EXIT_TIMERSLACK; |
d35fbf6b | 1460 | return -errno; |
4c2630eb | 1461 | } |
9eba9da4 | 1462 | |
d35fbf6b DM |
1463 | if (context->personality != 0xffffffffUL) |
1464 | if (personality(context->personality) < 0) { | |
ff0af2a1 | 1465 | *exit_status = EXIT_PERSONALITY; |
d35fbf6b | 1466 | return -errno; |
4c2630eb | 1467 | } |
94f04347 | 1468 | |
d35fbf6b DM |
1469 | if (context->utmp_id) |
1470 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path); | |
1471 | ||
524daa8c | 1472 | if (context->user && is_terminal_input(context->std_input)) { |
ff0af2a1 LP |
1473 | r = chown_terminal(STDIN_FILENO, uid); |
1474 | if (r < 0) { | |
1475 | *exit_status = EXIT_STDIN; | |
1476 | return r; | |
071830ff | 1477 | } |
d35fbf6b | 1478 | } |
8e274523 | 1479 | |
e44da745 DM |
1480 | #ifdef ENABLE_KDBUS |
1481 | if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) { | |
fed1e721 | 1482 | uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid; |
e44da745 | 1483 | |
ff0af2a1 LP |
1484 | r = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint); |
1485 | if (r < 0) { | |
1486 | *exit_status = EXIT_BUS_ENDPOINT; | |
1487 | return r; | |
e44da745 DM |
1488 | } |
1489 | } | |
1490 | #endif | |
1491 | ||
a931ad47 LP |
1492 | /* If delegation is enabled we'll pass ownership of the cgroup |
1493 | * (but only in systemd's own controller hierarchy!) to the | |
1494 | * user of the new process. */ | |
1495 | if (params->cgroup_path && context->user && params->cgroup_delegate) { | |
ff0af2a1 LP |
1496 | r = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid); |
1497 | if (r < 0) { | |
1498 | *exit_status = EXIT_CGROUP; | |
1499 | return r; | |
d35fbf6b | 1500 | } |
034c6ed7 | 1501 | |
034c6ed7 | 1502 | |
ff0af2a1 LP |
1503 | r = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0755, uid, gid); |
1504 | if (r < 0) { | |
1505 | *exit_status = EXIT_CGROUP; | |
1506 | return r; | |
034c6ed7 | 1507 | } |
d35fbf6b | 1508 | } |
034c6ed7 | 1509 | |
d35fbf6b DM |
1510 | if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) { |
1511 | char **rt; | |
fb33a393 | 1512 | |
d35fbf6b DM |
1513 | STRV_FOREACH(rt, context->runtime_directory) { |
1514 | _cleanup_free_ char *p; | |
94f04347 | 1515 | |
d35fbf6b DM |
1516 | p = strjoin(params->runtime_prefix, "/", *rt, NULL); |
1517 | if (!p) { | |
ff0af2a1 | 1518 | *exit_status = EXIT_RUNTIME_DIRECTORY; |
d35fbf6b | 1519 | return -ENOMEM; |
94f04347 | 1520 | } |
94f04347 | 1521 | |
ca905b2f | 1522 | r = mkdir_safe_label(p, context->runtime_directory_mode, uid, gid); |
ff0af2a1 LP |
1523 | if (r < 0) { |
1524 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1525 | return r; | |
94f04347 | 1526 | } |
d35fbf6b DM |
1527 | } |
1528 | } | |
94f04347 | 1529 | |
d35fbf6b | 1530 | if (params->apply_permissions) { |
ff0af2a1 LP |
1531 | r = enforce_groups(context, username, gid); |
1532 | if (r < 0) { | |
1533 | *exit_status = EXIT_GROUP; | |
1534 | return r; | |
d35fbf6b DM |
1535 | } |
1536 | } | |
9eba9da4 | 1537 | |
d35fbf6b | 1538 | umask(context->umask); |
94f04347 | 1539 | |
d35fbf6b DM |
1540 | #ifdef HAVE_PAM |
1541 | if (params->apply_permissions && context->pam_name && username) { | |
ff0af2a1 LP |
1542 | r = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds); |
1543 | if (r < 0) { | |
1544 | *exit_status = EXIT_PAM; | |
1545 | return r; | |
d35fbf6b DM |
1546 | } |
1547 | } | |
1548 | #endif | |
ac45f971 | 1549 | |
d35fbf6b | 1550 | if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) { |
ff0af2a1 LP |
1551 | r = setup_netns(runtime->netns_storage_socket); |
1552 | if (r < 0) { | |
1553 | *exit_status = EXIT_NETWORK; | |
1554 | return r; | |
d35fbf6b DM |
1555 | } |
1556 | } | |
169c1bda | 1557 | |
d35fbf6b DM |
1558 | if (!strv_isempty(context->read_write_dirs) || |
1559 | !strv_isempty(context->read_only_dirs) || | |
1560 | !strv_isempty(context->inaccessible_dirs) || | |
1561 | context->mount_flags != 0 || | |
1562 | (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) || | |
e44da745 | 1563 | params->bus_endpoint_path || |
d35fbf6b DM |
1564 | context->private_devices || |
1565 | context->protect_system != PROTECT_SYSTEM_NO || | |
1566 | context->protect_home != PROTECT_HOME_NO) { | |
1567 | ||
1568 | char *tmp = NULL, *var = NULL; | |
1569 | ||
1570 | /* The runtime struct only contains the parent | |
1571 | * of the private /tmp, which is | |
1572 | * non-accessible to world users. Inside of it | |
1573 | * there's a /tmp that is sticky, and that's | |
1574 | * the one we want to use here. */ | |
1575 | ||
1576 | if (context->private_tmp && runtime) { | |
1577 | if (runtime->tmp_dir) | |
63c372cb | 1578 | tmp = strjoina(runtime->tmp_dir, "/tmp"); |
d35fbf6b | 1579 | if (runtime->var_tmp_dir) |
63c372cb | 1580 | var = strjoina(runtime->var_tmp_dir, "/tmp"); |
d35fbf6b | 1581 | } |
d8b4e2e9 | 1582 | |
ff0af2a1 | 1583 | r = setup_namespace( |
d35fbf6b DM |
1584 | context->read_write_dirs, |
1585 | context->read_only_dirs, | |
1586 | context->inaccessible_dirs, | |
1587 | tmp, | |
1588 | var, | |
e44da745 | 1589 | params->bus_endpoint_path, |
d35fbf6b DM |
1590 | context->private_devices, |
1591 | context->protect_home, | |
1592 | context->protect_system, | |
1593 | context->mount_flags); | |
0015ebf3 | 1594 | |
ff0af2a1 LP |
1595 | /* If we couldn't set up the namespace this is |
1596 | * probably due to a missing capability. In this case, | |
1597 | * silently proceeed. */ | |
1598 | if (r == -EPERM || r == -EACCES) { | |
1599 | log_open(); | |
1600 | log_unit_debug_errno(params->unit_id, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m"); | |
1601 | log_close(); | |
1602 | } else if (r < 0) { | |
1603 | *exit_status = EXIT_NAMESPACE; | |
1604 | return r; | |
81a2b7ce | 1605 | } |
d35fbf6b | 1606 | } |
81a2b7ce | 1607 | |
d35fbf6b DM |
1608 | if (params->apply_chroot) { |
1609 | if (context->root_directory) | |
1610 | if (chroot(context->root_directory) < 0) { | |
ff0af2a1 | 1611 | *exit_status = EXIT_CHROOT; |
d35fbf6b | 1612 | return -errno; |
8aa75193 LP |
1613 | } |
1614 | ||
4c08c824 LP |
1615 | if (chdir(context->working_directory ?: "/") < 0 && |
1616 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1617 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1618 | return -errno; |
1619 | } | |
1620 | } else { | |
1621 | _cleanup_free_ char *d = NULL; | |
8aa75193 | 1622 | |
d35fbf6b | 1623 | if (asprintf(&d, "%s/%s", |
cf1d0302 LP |
1624 | context->root_directory ?: "", |
1625 | context->working_directory ?: "") < 0) { | |
ff0af2a1 | 1626 | *exit_status = EXIT_MEMORY; |
d35fbf6b | 1627 | return -ENOMEM; |
8aa75193 | 1628 | } |
8aa75193 | 1629 | |
cf1d0302 LP |
1630 | if (chdir(d) < 0 && |
1631 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1632 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1633 | return -errno; |
1634 | } | |
1635 | } | |
e66cf1a3 | 1636 | |
9008e1ac MS |
1637 | #ifdef HAVE_SELINUX |
1638 | if (params->apply_permissions && mac_selinux_use() && params->selinux_context_net && socket_fd >= 0) { | |
ff0af2a1 LP |
1639 | r = mac_selinux_get_child_mls_label(socket_fd, command->path, context->selinux_context, &mac_selinux_context_net); |
1640 | if (r < 0) { | |
1641 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1642 | return r; | |
9008e1ac MS |
1643 | } |
1644 | } | |
1645 | #endif | |
1646 | ||
d35fbf6b DM |
1647 | /* We repeat the fd closing here, to make sure that |
1648 | * nothing is leaked from the PAM modules. Note that | |
1649 | * we are more aggressive this time since socket_fd | |
e44da745 DM |
1650 | * and the netns fds we don't need anymore. The custom |
1651 | * endpoint fd was needed to upload the policy and can | |
1652 | * now be closed as well. */ | |
ff0af2a1 LP |
1653 | r = close_all_fds(fds, n_fds); |
1654 | if (r >= 0) | |
1655 | r = shift_fds(fds, n_fds); | |
1656 | if (r >= 0) | |
1657 | r = flags_fds(fds, n_fds, context->non_blocking); | |
1658 | if (r < 0) { | |
1659 | *exit_status = EXIT_FDS; | |
1660 | return r; | |
d35fbf6b | 1661 | } |
e66cf1a3 | 1662 | |
d35fbf6b | 1663 | if (params->apply_permissions) { |
e66cf1a3 | 1664 | |
d35fbf6b DM |
1665 | for (i = 0; i < _RLIMIT_MAX; i++) { |
1666 | if (!context->rlimit[i]) | |
1667 | continue; | |
1668 | ||
1669 | if (setrlimit_closest(i, context->rlimit[i]) < 0) { | |
ff0af2a1 | 1670 | *exit_status = EXIT_LIMITS; |
d35fbf6b | 1671 | return -errno; |
e66cf1a3 LP |
1672 | } |
1673 | } | |
1674 | ||
d35fbf6b | 1675 | if (context->capability_bounding_set_drop) { |
ff0af2a1 LP |
1676 | r = capability_bounding_set_drop(context->capability_bounding_set_drop, false); |
1677 | if (r < 0) { | |
1678 | *exit_status = EXIT_CAPABILITIES; | |
1679 | return r; | |
3b8bddde | 1680 | } |
4c2630eb | 1681 | } |
3b8bddde | 1682 | |
2ca620c4 WC |
1683 | #ifdef HAVE_SMACK |
1684 | if (context->smack_process_label) { | |
ff0af2a1 LP |
1685 | r = mac_smack_apply_pid(0, context->smack_process_label); |
1686 | if (r < 0) { | |
1687 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1688 | return r; | |
2ca620c4 WC |
1689 | } |
1690 | } | |
1691 | #endif | |
1692 | ||
d35fbf6b | 1693 | if (context->user) { |
ff0af2a1 LP |
1694 | r = enforce_user(context, uid); |
1695 | if (r < 0) { | |
1696 | *exit_status = EXIT_USER; | |
1697 | return r; | |
5b6319dc LP |
1698 | } |
1699 | } | |
d35fbf6b DM |
1700 | |
1701 | /* PR_GET_SECUREBITS is not privileged, while | |
1702 | * PR_SET_SECUREBITS is. So to suppress | |
1703 | * potential EPERMs we'll try not to call | |
1704 | * PR_SET_SECUREBITS unless necessary. */ | |
1705 | if (prctl(PR_GET_SECUREBITS) != context->secure_bits) | |
1706 | if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) { | |
ff0af2a1 | 1707 | *exit_status = EXIT_SECUREBITS; |
d35fbf6b | 1708 | return -errno; |
ff01d048 | 1709 | } |
5b6319dc | 1710 | |
d35fbf6b DM |
1711 | if (context->capabilities) |
1712 | if (cap_set_proc(context->capabilities) < 0) { | |
ff0af2a1 | 1713 | *exit_status = EXIT_CAPABILITIES; |
d35fbf6b | 1714 | return -errno; |
613b411c LP |
1715 | } |
1716 | ||
d35fbf6b DM |
1717 | if (context->no_new_privileges) |
1718 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { | |
ff0af2a1 | 1719 | *exit_status = EXIT_NO_NEW_PRIVILEGES; |
d35fbf6b DM |
1720 | return -errno; |
1721 | } | |
1722 | ||
1723 | #ifdef HAVE_SECCOMP | |
1724 | if (context->address_families_whitelist || | |
1725 | !set_isempty(context->address_families)) { | |
ff0af2a1 LP |
1726 | r = apply_address_families(context); |
1727 | if (r < 0) { | |
1728 | *exit_status = EXIT_ADDRESS_FAMILIES; | |
1729 | return r; | |
4c2630eb MS |
1730 | } |
1731 | } | |
04aa0cb9 | 1732 | |
d35fbf6b DM |
1733 | if (context->syscall_whitelist || |
1734 | !set_isempty(context->syscall_filter) || | |
1735 | !set_isempty(context->syscall_archs)) { | |
ff0af2a1 LP |
1736 | r = apply_seccomp(context); |
1737 | if (r < 0) { | |
1738 | *exit_status = EXIT_SECCOMP; | |
1739 | return r; | |
81a2b7ce | 1740 | } |
d35fbf6b DM |
1741 | } |
1742 | #endif | |
81a2b7ce | 1743 | |
d35fbf6b | 1744 | #ifdef HAVE_SELINUX |
6baa7db0 | 1745 | if (mac_selinux_use()) { |
9008e1ac | 1746 | char *exec_context = mac_selinux_context_net ?: context->selinux_context; |
16115b0a | 1747 | |
9008e1ac | 1748 | if (exec_context) { |
ff0af2a1 LP |
1749 | r = setexeccon(exec_context); |
1750 | if (r < 0) { | |
1751 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1752 | return r; | |
16115b0a | 1753 | } |
81a2b7ce | 1754 | } |
81a2b7ce | 1755 | } |
d35fbf6b | 1756 | #endif |
81a2b7ce | 1757 | |
d35fbf6b | 1758 | #ifdef HAVE_APPARMOR |
6baa7db0 | 1759 | if (context->apparmor_profile && mac_apparmor_use()) { |
ff0af2a1 LP |
1760 | r = aa_change_onexec(context->apparmor_profile); |
1761 | if (r < 0 && !context->apparmor_profile_ignore) { | |
1762 | *exit_status = EXIT_APPARMOR_PROFILE; | |
5482192e | 1763 | return -errno; |
d35fbf6b | 1764 | } |
034c6ed7 | 1765 | } |
d35fbf6b DM |
1766 | #endif |
1767 | } | |
034c6ed7 | 1768 | |
ff0af2a1 LP |
1769 | r = build_environment(context, n_fds, params->watchdog_usec, home, username, shell, &our_env); |
1770 | if (r < 0) { | |
1771 | *exit_status = EXIT_MEMORY; | |
1772 | return r; | |
d35fbf6b | 1773 | } |
034c6ed7 | 1774 | |
d35fbf6b DM |
1775 | final_env = strv_env_merge(5, |
1776 | params->environment, | |
1777 | our_env, | |
1778 | context->environment, | |
1779 | files_env, | |
1780 | pam_env, | |
1781 | NULL); | |
1782 | if (!final_env) { | |
ff0af2a1 | 1783 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
1784 | return -ENOMEM; |
1785 | } | |
81a2b7ce | 1786 | |
d35fbf6b DM |
1787 | final_argv = replace_env_argv(argv, final_env); |
1788 | if (!final_argv) { | |
ff0af2a1 | 1789 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
1790 | return -ENOMEM; |
1791 | } | |
034c6ed7 | 1792 | |
d35fbf6b | 1793 | final_env = strv_env_clean(final_env); |
260abb78 | 1794 | |
553d2243 | 1795 | if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { |
d35fbf6b | 1796 | _cleanup_free_ char *line; |
81a2b7ce | 1797 | |
d35fbf6b DM |
1798 | line = exec_command_line(final_argv); |
1799 | if (line) { | |
1800 | log_open(); | |
e2cc6eca LP |
1801 | log_unit_struct(params->unit_id, |
1802 | LOG_DEBUG, | |
d35fbf6b | 1803 | "EXECUTABLE=%s", command->path, |
e2cc6eca | 1804 | LOG_MESSAGE("Executing: %s", line), |
d35fbf6b DM |
1805 | NULL); |
1806 | log_close(); | |
1807 | } | |
1808 | } | |
1809 | execve(command->path, final_argv, final_env); | |
ff0af2a1 | 1810 | *exit_status = EXIT_EXEC; |
d35fbf6b DM |
1811 | return -errno; |
1812 | } | |
81a2b7ce | 1813 | |
d35fbf6b DM |
1814 | int exec_spawn(ExecCommand *command, |
1815 | const ExecContext *context, | |
1816 | const ExecParameters *params, | |
1817 | ExecRuntime *runtime, | |
1818 | pid_t *ret) { | |
8351ceae | 1819 | |
d35fbf6b DM |
1820 | _cleanup_strv_free_ char **files_env = NULL; |
1821 | int *fds = NULL; unsigned n_fds = 0; | |
ff0af2a1 LP |
1822 | _cleanup_free_ char *line = NULL; |
1823 | int socket_fd, r; | |
1824 | char **argv; | |
d35fbf6b | 1825 | pid_t pid; |
8351ceae | 1826 | |
d35fbf6b DM |
1827 | assert(command); |
1828 | assert(context); | |
1829 | assert(ret); | |
1830 | assert(params); | |
1831 | assert(params->fds || params->n_fds <= 0); | |
4298d0b5 | 1832 | |
d35fbf6b DM |
1833 | if (context->std_input == EXEC_INPUT_SOCKET || |
1834 | context->std_output == EXEC_OUTPUT_SOCKET || | |
1835 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 1836 | |
ff0af2a1 LP |
1837 | if (params->n_fds != 1) { |
1838 | log_unit_error(params->unit_id, "Got more than one socket."); | |
d35fbf6b | 1839 | return -EINVAL; |
ff0af2a1 | 1840 | } |
eef65bf3 | 1841 | |
d35fbf6b DM |
1842 | socket_fd = params->fds[0]; |
1843 | } else { | |
1844 | socket_fd = -1; | |
1845 | fds = params->fds; | |
1846 | n_fds = params->n_fds; | |
1847 | } | |
94f04347 | 1848 | |
ff0af2a1 LP |
1849 | r = exec_context_load_environment(context, params->unit_id, &files_env); |
1850 | if (r < 0) | |
1851 | return log_unit_error_errno(params->unit_id, r, "Failed to load environment files: %m"); | |
034c6ed7 | 1852 | |
d35fbf6b | 1853 | argv = params->argv ?: command->argv; |
d35fbf6b DM |
1854 | line = exec_command_line(argv); |
1855 | if (!line) | |
1856 | return log_oom(); | |
fab56fc5 | 1857 | |
e2cc6eca LP |
1858 | log_unit_struct(params->unit_id, |
1859 | LOG_DEBUG, | |
d35fbf6b | 1860 | "EXECUTABLE=%s", command->path, |
e2cc6eca | 1861 | LOG_MESSAGE("About to execute: %s", line), |
d35fbf6b | 1862 | NULL); |
d35fbf6b DM |
1863 | pid = fork(); |
1864 | if (pid < 0) | |
ff0af2a1 | 1865 | return log_unit_error_errno(params->unit_id, r, "Failed to fork: %m"); |
d35fbf6b DM |
1866 | |
1867 | if (pid == 0) { | |
ff0af2a1 LP |
1868 | int exit_status; |
1869 | ||
1870 | r = exec_child(command, | |
1871 | context, | |
1872 | params, | |
1873 | runtime, | |
1874 | argv, | |
1875 | socket_fd, | |
1876 | fds, n_fds, | |
1877 | files_env, | |
1878 | &exit_status); | |
1879 | if (r < 0) { | |
4c2630eb | 1880 | log_open(); |
ff0af2a1 LP |
1881 | log_unit_struct(params->unit_id, |
1882 | LOG_ERR, | |
1883 | LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), | |
1884 | "EXECUTABLE=%s", command->path, | |
1885 | LOG_MESSAGE("Failed at step %s spawning %s: %s", | |
1886 | exit_status_to_string(exit_status, EXIT_STATUS_SYSTEMD), | |
1887 | command->path, strerror(-r)), | |
1888 | LOG_ERRNO(r), | |
1889 | NULL); | |
4c2630eb MS |
1890 | } |
1891 | ||
ff0af2a1 | 1892 | _exit(exit_status); |
034c6ed7 LP |
1893 | } |
1894 | ||
ff0af2a1 | 1895 | log_unit_debug(params->unit_id, "Forked %s as "PID_FMT, command->path, pid); |
23635a85 | 1896 | |
80876c20 LP |
1897 | /* We add the new process to the cgroup both in the child (so |
1898 | * that we can be sure that no user code is ever executed | |
1899 | * outside of the cgroup) and in the parent (so that we can be | |
1900 | * sure that when we kill the cgroup the process will be | |
1901 | * killed too). */ | |
d35fbf6b DM |
1902 | if (params->cgroup_path) |
1903 | cg_attach(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, pid); | |
2da3263a | 1904 | |
b58b4116 | 1905 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 1906 | |
034c6ed7 | 1907 | *ret = pid; |
5cb5a6ff LP |
1908 | return 0; |
1909 | } | |
1910 | ||
034c6ed7 LP |
1911 | void exec_context_init(ExecContext *c) { |
1912 | assert(c); | |
1913 | ||
4c12626c | 1914 | c->umask = 0022; |
9eba9da4 | 1915 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 1916 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 1917 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 1918 | c->syslog_level_prefix = true; |
353e12c2 | 1919 | c->ignore_sigpipe = true; |
3a43da28 | 1920 | c->timer_slack_nsec = NSEC_INFINITY; |
ac45f971 | 1921 | c->personality = 0xffffffffUL; |
e66cf1a3 | 1922 | c->runtime_directory_mode = 0755; |
034c6ed7 LP |
1923 | } |
1924 | ||
613b411c | 1925 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
1926 | unsigned l; |
1927 | ||
1928 | assert(c); | |
1929 | ||
1930 | strv_free(c->environment); | |
034c6ed7 | 1931 | c->environment = NULL; |
5cb5a6ff | 1932 | |
8c7be95e LP |
1933 | strv_free(c->environment_files); |
1934 | c->environment_files = NULL; | |
1935 | ||
034c6ed7 | 1936 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) { |
5cb5a6ff | 1937 | free(c->rlimit[l]); |
034c6ed7 LP |
1938 | c->rlimit[l] = NULL; |
1939 | } | |
1940 | ||
9eba9da4 LP |
1941 | free(c->working_directory); |
1942 | c->working_directory = NULL; | |
1943 | free(c->root_directory); | |
1944 | c->root_directory = NULL; | |
5cb5a6ff | 1945 | |
80876c20 LP |
1946 | free(c->tty_path); |
1947 | c->tty_path = NULL; | |
1948 | ||
071830ff LP |
1949 | free(c->syslog_identifier); |
1950 | c->syslog_identifier = NULL; | |
1951 | ||
5cb5a6ff | 1952 | free(c->user); |
034c6ed7 LP |
1953 | c->user = NULL; |
1954 | ||
5cb5a6ff | 1955 | free(c->group); |
034c6ed7 LP |
1956 | c->group = NULL; |
1957 | ||
1958 | strv_free(c->supplementary_groups); | |
1959 | c->supplementary_groups = NULL; | |
94f04347 | 1960 | |
5b6319dc LP |
1961 | free(c->pam_name); |
1962 | c->pam_name = NULL; | |
1963 | ||
94f04347 LP |
1964 | if (c->capabilities) { |
1965 | cap_free(c->capabilities); | |
1966 | c->capabilities = NULL; | |
1967 | } | |
15ae422b LP |
1968 | |
1969 | strv_free(c->read_only_dirs); | |
1970 | c->read_only_dirs = NULL; | |
1971 | ||
1972 | strv_free(c->read_write_dirs); | |
1973 | c->read_write_dirs = NULL; | |
1974 | ||
1975 | strv_free(c->inaccessible_dirs); | |
1976 | c->inaccessible_dirs = NULL; | |
82c121a4 LP |
1977 | |
1978 | if (c->cpuset) | |
1979 | CPU_FREE(c->cpuset); | |
86a3475b LP |
1980 | |
1981 | free(c->utmp_id); | |
1982 | c->utmp_id = NULL; | |
b9a0e010 | 1983 | |
7b52a628 MS |
1984 | free(c->selinux_context); |
1985 | c->selinux_context = NULL; | |
1986 | ||
eef65bf3 MS |
1987 | free(c->apparmor_profile); |
1988 | c->apparmor_profile = NULL; | |
1989 | ||
17df7223 LP |
1990 | set_free(c->syscall_filter); |
1991 | c->syscall_filter = NULL; | |
57183d11 LP |
1992 | |
1993 | set_free(c->syscall_archs); | |
1994 | c->syscall_archs = NULL; | |
4298d0b5 LP |
1995 | |
1996 | set_free(c->address_families); | |
1997 | c->address_families = NULL; | |
e66cf1a3 LP |
1998 | |
1999 | strv_free(c->runtime_directory); | |
2000 | c->runtime_directory = NULL; | |
bb7dd0b0 DM |
2001 | |
2002 | bus_endpoint_free(c->bus_endpoint); | |
2003 | c->bus_endpoint = NULL; | |
e66cf1a3 LP |
2004 | } |
2005 | ||
2006 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) { | |
2007 | char **i; | |
2008 | ||
2009 | assert(c); | |
2010 | ||
2011 | if (!runtime_prefix) | |
2012 | return 0; | |
2013 | ||
2014 | STRV_FOREACH(i, c->runtime_directory) { | |
2015 | _cleanup_free_ char *p; | |
2016 | ||
2017 | p = strjoin(runtime_prefix, "/", *i, NULL); | |
2018 | if (!p) | |
2019 | return -ENOMEM; | |
2020 | ||
2021 | /* We execute this synchronously, since we need to be | |
2022 | * sure this is gone when we start the service | |
2023 | * next. */ | |
c6878637 | 2024 | (void) rm_rf(p, REMOVE_ROOT); |
e66cf1a3 LP |
2025 | } |
2026 | ||
2027 | return 0; | |
5cb5a6ff LP |
2028 | } |
2029 | ||
43d0fcbd LP |
2030 | void exec_command_done(ExecCommand *c) { |
2031 | assert(c); | |
2032 | ||
2033 | free(c->path); | |
2034 | c->path = NULL; | |
2035 | ||
2036 | strv_free(c->argv); | |
2037 | c->argv = NULL; | |
2038 | } | |
2039 | ||
2040 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
2041 | unsigned i; | |
2042 | ||
2043 | for (i = 0; i < n; i++) | |
2044 | exec_command_done(c+i); | |
2045 | } | |
2046 | ||
f1acf85a | 2047 | ExecCommand* exec_command_free_list(ExecCommand *c) { |
5cb5a6ff LP |
2048 | ExecCommand *i; |
2049 | ||
2050 | while ((i = c)) { | |
71fda00f | 2051 | LIST_REMOVE(command, c, i); |
43d0fcbd | 2052 | exec_command_done(i); |
5cb5a6ff LP |
2053 | free(i); |
2054 | } | |
f1acf85a ZJS |
2055 | |
2056 | return NULL; | |
5cb5a6ff LP |
2057 | } |
2058 | ||
034c6ed7 LP |
2059 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
2060 | unsigned i; | |
2061 | ||
f1acf85a ZJS |
2062 | for (i = 0; i < n; i++) |
2063 | c[i] = exec_command_free_list(c[i]); | |
034c6ed7 LP |
2064 | } |
2065 | ||
039f0e70 LP |
2066 | typedef struct InvalidEnvInfo { |
2067 | const char *unit_id; | |
2068 | const char *path; | |
2069 | } InvalidEnvInfo; | |
2070 | ||
2071 | static void invalid_env(const char *p, void *userdata) { | |
2072 | InvalidEnvInfo *info = userdata; | |
2073 | ||
2074 | log_unit_error(info->unit_id, "Ignoring invalid environment assignment '%s': %s", p, info->path); | |
2075 | } | |
2076 | ||
7491ccf2 | 2077 | int exec_context_load_environment(const ExecContext *c, const char *unit_id, char ***l) { |
8c7be95e LP |
2078 | char **i, **r = NULL; |
2079 | ||
2080 | assert(c); | |
2081 | assert(l); | |
2082 | ||
2083 | STRV_FOREACH(i, c->environment_files) { | |
2084 | char *fn; | |
2085 | int k; | |
2086 | bool ignore = false; | |
2087 | char **p; | |
7fd1b19b | 2088 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 2089 | int count, n; |
8c7be95e LP |
2090 | |
2091 | fn = *i; | |
2092 | ||
2093 | if (fn[0] == '-') { | |
2094 | ignore = true; | |
2095 | fn ++; | |
2096 | } | |
2097 | ||
2098 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
2099 | if (ignore) |
2100 | continue; | |
2101 | ||
2102 | strv_free(r); | |
2103 | return -EINVAL; | |
2104 | } | |
2105 | ||
2bef10ab | 2106 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
2107 | errno = 0; |
2108 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
2109 | if (ignore) |
2110 | continue; | |
8c7be95e | 2111 | |
2bef10ab PL |
2112 | strv_free(r); |
2113 | return errno ? -errno : -EINVAL; | |
2114 | } | |
2115 | count = pglob.gl_pathc; | |
2116 | if (count == 0) { | |
8c7be95e LP |
2117 | if (ignore) |
2118 | continue; | |
2119 | ||
2120 | strv_free(r); | |
2bef10ab | 2121 | return -EINVAL; |
8c7be95e | 2122 | } |
2bef10ab | 2123 | for (n = 0; n < count; n++) { |
717603e3 | 2124 | k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
2125 | if (k < 0) { |
2126 | if (ignore) | |
2127 | continue; | |
8c7be95e | 2128 | |
2bef10ab | 2129 | strv_free(r); |
2bef10ab | 2130 | return k; |
e9c1ea9d | 2131 | } |
ebc05a09 | 2132 | /* Log invalid environment variables with filename */ |
039f0e70 LP |
2133 | if (p) { |
2134 | InvalidEnvInfo info = { | |
2135 | .unit_id = unit_id, | |
2136 | .path = pglob.gl_pathv[n] | |
2137 | }; | |
2138 | ||
2139 | p = strv_env_clean_with_callback(p, invalid_env, &info); | |
2140 | } | |
8c7be95e | 2141 | |
2bef10ab PL |
2142 | if (r == NULL) |
2143 | r = p; | |
2144 | else { | |
2145 | char **m; | |
8c7be95e | 2146 | |
2bef10ab PL |
2147 | m = strv_env_merge(2, r, p); |
2148 | strv_free(r); | |
2149 | strv_free(p); | |
c84a9488 | 2150 | if (!m) |
2bef10ab | 2151 | return -ENOMEM; |
2bef10ab PL |
2152 | |
2153 | r = m; | |
2154 | } | |
8c7be95e LP |
2155 | } |
2156 | } | |
2157 | ||
2158 | *l = r; | |
2159 | ||
2160 | return 0; | |
2161 | } | |
2162 | ||
6ac8fdc9 | 2163 | static bool tty_may_match_dev_console(const char *tty) { |
e1d75803 RC |
2164 | _cleanup_free_ char *active = NULL; |
2165 | char *console; | |
6ac8fdc9 MS |
2166 | |
2167 | if (startswith(tty, "/dev/")) | |
2168 | tty += 5; | |
2169 | ||
2170 | /* trivial identity? */ | |
2171 | if (streq(tty, "console")) | |
2172 | return true; | |
2173 | ||
2174 | console = resolve_dev_console(&active); | |
2175 | /* if we could not resolve, assume it may */ | |
2176 | if (!console) | |
2177 | return true; | |
2178 | ||
2179 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
e1d75803 | 2180 | return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
2181 | } |
2182 | ||
2183 | bool exec_context_may_touch_console(ExecContext *ec) { | |
2184 | return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate || | |
2185 | is_terminal_input(ec->std_input) || | |
2186 | is_terminal_output(ec->std_output) || | |
2187 | is_terminal_output(ec->std_error)) && | |
2188 | tty_may_match_dev_console(tty_path(ec)); | |
2189 | } | |
2190 | ||
15ae422b LP |
2191 | static void strv_fprintf(FILE *f, char **l) { |
2192 | char **g; | |
2193 | ||
2194 | assert(f); | |
2195 | ||
2196 | STRV_FOREACH(g, l) | |
2197 | fprintf(f, " %s", *g); | |
2198 | } | |
2199 | ||
5cb5a6ff | 2200 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
507f22bd | 2201 | char **e; |
94f04347 | 2202 | unsigned i; |
9eba9da4 | 2203 | |
5cb5a6ff LP |
2204 | assert(c); |
2205 | assert(f); | |
2206 | ||
4ad49000 | 2207 | prefix = strempty(prefix); |
5cb5a6ff LP |
2208 | |
2209 | fprintf(f, | |
94f04347 LP |
2210 | "%sUMask: %04o\n" |
2211 | "%sWorkingDirectory: %s\n" | |
451a074f | 2212 | "%sRootDirectory: %s\n" |
15ae422b | 2213 | "%sNonBlocking: %s\n" |
64747e2d | 2214 | "%sPrivateTmp: %s\n" |
4819ff03 | 2215 | "%sPrivateNetwork: %s\n" |
7f112f50 | 2216 | "%sPrivateDevices: %s\n" |
1b8689f9 LP |
2217 | "%sProtectHome: %s\n" |
2218 | "%sProtectSystem: %s\n" | |
3bb07b76 | 2219 | "%sIgnoreSIGPIPE: %s\n", |
5cb5a6ff | 2220 | prefix, c->umask, |
9eba9da4 | 2221 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 2222 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 2223 | prefix, yes_no(c->non_blocking), |
64747e2d | 2224 | prefix, yes_no(c->private_tmp), |
4819ff03 | 2225 | prefix, yes_no(c->private_network), |
7f112f50 | 2226 | prefix, yes_no(c->private_devices), |
1b8689f9 LP |
2227 | prefix, protect_home_to_string(c->protect_home), |
2228 | prefix, protect_system_to_string(c->protect_system), | |
3bb07b76 | 2229 | prefix, yes_no(c->ignore_sigpipe)); |
fb33a393 | 2230 | |
8c7be95e LP |
2231 | STRV_FOREACH(e, c->environment) |
2232 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
2233 | ||
2234 | STRV_FOREACH(e, c->environment_files) | |
2235 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 2236 | |
fb33a393 LP |
2237 | if (c->nice_set) |
2238 | fprintf(f, | |
2239 | "%sNice: %i\n", | |
2240 | prefix, c->nice); | |
2241 | ||
dd6c17b1 | 2242 | if (c->oom_score_adjust_set) |
fb33a393 | 2243 | fprintf(f, |
dd6c17b1 LP |
2244 | "%sOOMScoreAdjust: %i\n", |
2245 | prefix, c->oom_score_adjust); | |
9eba9da4 | 2246 | |
94f04347 LP |
2247 | for (i = 0; i < RLIM_NLIMITS; i++) |
2248 | if (c->rlimit[i]) | |
de0671ee ZJS |
2249 | fprintf(f, "%s%s: "RLIM_FMT"\n", |
2250 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); | |
94f04347 | 2251 | |
f8b69d1d | 2252 | if (c->ioprio_set) { |
1756a011 | 2253 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 2254 | |
1756a011 | 2255 | ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); |
9eba9da4 LP |
2256 | fprintf(f, |
2257 | "%sIOSchedulingClass: %s\n" | |
2258 | "%sIOPriority: %i\n", | |
f8b69d1d | 2259 | prefix, strna(class_str), |
9eba9da4 | 2260 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d | 2261 | } |
94f04347 | 2262 | |
f8b69d1d | 2263 | if (c->cpu_sched_set) { |
1756a011 | 2264 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 2265 | |
1756a011 | 2266 | sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
94f04347 LP |
2267 | fprintf(f, |
2268 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
2269 | "%sCPUSchedulingPriority: %i\n" |
2270 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 2271 | prefix, strna(policy_str), |
38b48754 LP |
2272 | prefix, c->cpu_sched_priority, |
2273 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 2274 | } |
94f04347 | 2275 | |
82c121a4 | 2276 | if (c->cpuset) { |
94f04347 | 2277 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
2278 | for (i = 0; i < c->cpuset_ncpus; i++) |
2279 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
43a99a7a | 2280 | fprintf(f, " %u", i); |
94f04347 LP |
2281 | fputs("\n", f); |
2282 | } | |
2283 | ||
3a43da28 | 2284 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 2285 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
2286 | |
2287 | fprintf(f, | |
80876c20 LP |
2288 | "%sStandardInput: %s\n" |
2289 | "%sStandardOutput: %s\n" | |
2290 | "%sStandardError: %s\n", | |
2291 | prefix, exec_input_to_string(c->std_input), | |
2292 | prefix, exec_output_to_string(c->std_output), | |
2293 | prefix, exec_output_to_string(c->std_error)); | |
2294 | ||
2295 | if (c->tty_path) | |
2296 | fprintf(f, | |
6ea832a2 LP |
2297 | "%sTTYPath: %s\n" |
2298 | "%sTTYReset: %s\n" | |
2299 | "%sTTYVHangup: %s\n" | |
2300 | "%sTTYVTDisallocate: %s\n", | |
2301 | prefix, c->tty_path, | |
2302 | prefix, yes_no(c->tty_reset), | |
2303 | prefix, yes_no(c->tty_vhangup), | |
2304 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 2305 | |
5ce70e5b ZJS |
2306 | if (c->std_output == EXEC_OUTPUT_SYSLOG || |
2307 | c->std_output == EXEC_OUTPUT_KMSG || | |
2308 | c->std_output == EXEC_OUTPUT_JOURNAL || | |
2309 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2310 | c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2311 | c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
2312 | c->std_error == EXEC_OUTPUT_SYSLOG || | |
2313 | c->std_error == EXEC_OUTPUT_KMSG || | |
2314 | c->std_error == EXEC_OUTPUT_JOURNAL || | |
2315 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2316 | c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2317 | c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { | |
f8b69d1d | 2318 | |
5ce70e5b | 2319 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 2320 | |
5ce70e5b ZJS |
2321 | log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
2322 | log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
f8b69d1d | 2323 | |
94f04347 LP |
2324 | fprintf(f, |
2325 | "%sSyslogFacility: %s\n" | |
2326 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
2327 | prefix, strna(fac_str), |
2328 | prefix, strna(lvl_str)); | |
f8b69d1d | 2329 | } |
94f04347 LP |
2330 | |
2331 | if (c->capabilities) { | |
5ce70e5b ZJS |
2332 | _cleanup_cap_free_charp_ char *t; |
2333 | ||
2334 | t = cap_to_text(c->capabilities, NULL); | |
2335 | if (t) | |
2336 | fprintf(f, "%sCapabilities: %s\n", prefix, t); | |
94f04347 LP |
2337 | } |
2338 | ||
2339 | if (c->secure_bits) | |
2340 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
2341 | prefix, | |
cbb21cca ZJS |
2342 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
2343 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
2344 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
2345 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
2346 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
2347 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 LP |
2348 | |
2349 | if (c->capability_bounding_set_drop) { | |
ae556c21 | 2350 | unsigned long l; |
260abb78 | 2351 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2352 | |
64685e0c | 2353 | for (l = 0; l <= cap_last_cap(); l++) |
2822da4f LP |
2354 | if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) |
2355 | fprintf(f, " %s", strna(capability_to_name(l))); | |
94f04347 LP |
2356 | |
2357 | fputs("\n", f); | |
2358 | } | |
2359 | ||
2360 | if (c->user) | |
f2d3769a | 2361 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2362 | if (c->group) |
f2d3769a | 2363 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2364 | |
15ae422b | 2365 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2366 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2367 | strv_fprintf(f, c->supplementary_groups); |
2368 | fputs("\n", f); | |
2369 | } | |
94f04347 | 2370 | |
5b6319dc | 2371 | if (c->pam_name) |
f2d3769a | 2372 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2373 | |
15ae422b LP |
2374 | if (strv_length(c->read_write_dirs) > 0) { |
2375 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2376 | strv_fprintf(f, c->read_write_dirs); | |
2377 | fputs("\n", f); | |
2378 | } | |
2379 | ||
2380 | if (strv_length(c->read_only_dirs) > 0) { | |
2381 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2382 | strv_fprintf(f, c->read_only_dirs); | |
2383 | fputs("\n", f); | |
2384 | } | |
94f04347 | 2385 | |
15ae422b LP |
2386 | if (strv_length(c->inaccessible_dirs) > 0) { |
2387 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2388 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2389 | fputs("\n", f); |
2390 | } | |
2e22afe9 | 2391 | |
169c1bda LP |
2392 | if (c->utmp_id) |
2393 | fprintf(f, | |
2394 | "%sUtmpIdentifier: %s\n", | |
2395 | prefix, c->utmp_id); | |
7b52a628 MS |
2396 | |
2397 | if (c->selinux_context) | |
2398 | fprintf(f, | |
5f8640fb LP |
2399 | "%sSELinuxContext: %s%s\n", |
2400 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 2401 | |
ac45f971 LP |
2402 | if (c->personality != 0xffffffffUL) |
2403 | fprintf(f, | |
2404 | "%sPersonality: %s\n", | |
2405 | prefix, strna(personality_to_string(c->personality))); | |
2406 | ||
17df7223 | 2407 | if (c->syscall_filter) { |
351a19b1 | 2408 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2409 | Iterator j; |
2410 | void *id; | |
2411 | bool first = true; | |
351a19b1 | 2412 | #endif |
17df7223 LP |
2413 | |
2414 | fprintf(f, | |
57183d11 | 2415 | "%sSystemCallFilter: ", |
17df7223 LP |
2416 | prefix); |
2417 | ||
2418 | if (!c->syscall_whitelist) | |
2419 | fputc('~', f); | |
2420 | ||
351a19b1 | 2421 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2422 | SET_FOREACH(id, c->syscall_filter, j) { |
2423 | _cleanup_free_ char *name = NULL; | |
2424 | ||
2425 | if (first) | |
2426 | first = false; | |
2427 | else | |
2428 | fputc(' ', f); | |
2429 | ||
57183d11 | 2430 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 LP |
2431 | fputs(strna(name), f); |
2432 | } | |
351a19b1 | 2433 | #endif |
17df7223 LP |
2434 | |
2435 | fputc('\n', f); | |
2436 | } | |
2437 | ||
57183d11 LP |
2438 | if (c->syscall_archs) { |
2439 | #ifdef HAVE_SECCOMP | |
2440 | Iterator j; | |
2441 | void *id; | |
2442 | #endif | |
2443 | ||
2444 | fprintf(f, | |
2445 | "%sSystemCallArchitectures:", | |
2446 | prefix); | |
2447 | ||
2448 | #ifdef HAVE_SECCOMP | |
2449 | SET_FOREACH(id, c->syscall_archs, j) | |
2450 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); | |
2451 | #endif | |
2452 | fputc('\n', f); | |
2453 | } | |
2454 | ||
17df7223 LP |
2455 | if (c->syscall_errno != 0) |
2456 | fprintf(f, | |
2457 | "%sSystemCallErrorNumber: %s\n", | |
2458 | prefix, strna(errno_to_name(c->syscall_errno))); | |
eef65bf3 MS |
2459 | |
2460 | if (c->apparmor_profile) | |
2461 | fprintf(f, | |
2462 | "%sAppArmorProfile: %s%s\n", | |
2463 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
5cb5a6ff LP |
2464 | } |
2465 | ||
a931ad47 LP |
2466 | bool exec_context_maintains_privileges(ExecContext *c) { |
2467 | assert(c); | |
2468 | ||
2469 | /* Returns true if the process forked off would run run under | |
2470 | * an unchanged UID or as root. */ | |
2471 | ||
2472 | if (!c->user) | |
2473 | return true; | |
2474 | ||
2475 | if (streq(c->user, "root") || streq(c->user, "0")) | |
2476 | return true; | |
2477 | ||
2478 | return false; | |
2479 | } | |
2480 | ||
b58b4116 | 2481 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2482 | assert(s); |
5cb5a6ff | 2483 | |
b58b4116 LP |
2484 | zero(*s); |
2485 | s->pid = pid; | |
2486 | dual_timestamp_get(&s->start_timestamp); | |
2487 | } | |
2488 | ||
6ea832a2 | 2489 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2490 | assert(s); |
2491 | ||
0b1f4ae6 | 2492 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2493 | zero(*s); |
2494 | ||
034c6ed7 | 2495 | s->pid = pid; |
63983207 | 2496 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2497 | |
034c6ed7 LP |
2498 | s->code = code; |
2499 | s->status = status; | |
169c1bda | 2500 | |
6ea832a2 LP |
2501 | if (context) { |
2502 | if (context->utmp_id) | |
2503 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2504 | ||
2505 | exec_context_tty_reset(context); | |
2506 | } | |
9fb86720 LP |
2507 | } |
2508 | ||
2509 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2510 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2511 | ||
2512 | assert(s); | |
2513 | assert(f); | |
2514 | ||
9fb86720 LP |
2515 | if (s->pid <= 0) |
2516 | return; | |
2517 | ||
4c940960 LP |
2518 | prefix = strempty(prefix); |
2519 | ||
9fb86720 | 2520 | fprintf(f, |
ccd06097 ZJS |
2521 | "%sPID: "PID_FMT"\n", |
2522 | prefix, s->pid); | |
9fb86720 | 2523 | |
63983207 | 2524 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2525 | fprintf(f, |
2526 | "%sStart Timestamp: %s\n", | |
63983207 | 2527 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2528 | |
63983207 | 2529 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2530 | fprintf(f, |
2531 | "%sExit Timestamp: %s\n" | |
2532 | "%sExit Code: %s\n" | |
2533 | "%sExit Status: %i\n", | |
63983207 | 2534 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2535 | prefix, sigchld_code_to_string(s->code), |
2536 | prefix, s->status); | |
5cb5a6ff | 2537 | } |
44d8db9e | 2538 | |
9e2f7c11 | 2539 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2540 | size_t k; |
2541 | char *n, *p, **a; | |
2542 | bool first = true; | |
2543 | ||
9e2f7c11 | 2544 | assert(argv); |
44d8db9e | 2545 | |
9164977d | 2546 | k = 1; |
9e2f7c11 | 2547 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2548 | k += strlen(*a)+3; |
2549 | ||
2550 | if (!(n = new(char, k))) | |
2551 | return NULL; | |
2552 | ||
2553 | p = n; | |
9e2f7c11 | 2554 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2555 | |
2556 | if (!first) | |
2557 | *(p++) = ' '; | |
2558 | else | |
2559 | first = false; | |
2560 | ||
2561 | if (strpbrk(*a, WHITESPACE)) { | |
2562 | *(p++) = '\''; | |
2563 | p = stpcpy(p, *a); | |
2564 | *(p++) = '\''; | |
2565 | } else | |
2566 | p = stpcpy(p, *a); | |
2567 | ||
2568 | } | |
2569 | ||
9164977d LP |
2570 | *p = 0; |
2571 | ||
44d8db9e LP |
2572 | /* FIXME: this doesn't really handle arguments that have |
2573 | * spaces and ticks in them */ | |
2574 | ||
2575 | return n; | |
2576 | } | |
2577 | ||
2578 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
e1d75803 | 2579 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 2580 | const char *prefix2; |
44d8db9e LP |
2581 | |
2582 | assert(c); | |
2583 | assert(f); | |
2584 | ||
4c940960 | 2585 | prefix = strempty(prefix); |
63c372cb | 2586 | prefix2 = strjoina(prefix, "\t"); |
44d8db9e | 2587 | |
9e2f7c11 | 2588 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2589 | fprintf(f, |
2590 | "%sCommand Line: %s\n", | |
2591 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2592 | ||
9fb86720 | 2593 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
2594 | } |
2595 | ||
2596 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2597 | assert(f); | |
2598 | ||
4c940960 | 2599 | prefix = strempty(prefix); |
44d8db9e LP |
2600 | |
2601 | LIST_FOREACH(command, c, c) | |
2602 | exec_command_dump(c, f, prefix); | |
2603 | } | |
94f04347 | 2604 | |
a6a80b4f LP |
2605 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2606 | ExecCommand *end; | |
2607 | ||
2608 | assert(l); | |
2609 | assert(e); | |
2610 | ||
2611 | if (*l) { | |
35b8ca3a | 2612 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2613 | LIST_FIND_TAIL(command, *l, end); |
2614 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2615 | } else |
2616 | *l = e; | |
2617 | } | |
2618 | ||
26fd040d LP |
2619 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2620 | va_list ap; | |
2621 | char **l, *p; | |
2622 | ||
2623 | assert(c); | |
2624 | assert(path); | |
2625 | ||
2626 | va_start(ap, path); | |
2627 | l = strv_new_ap(path, ap); | |
2628 | va_end(ap); | |
2629 | ||
2630 | if (!l) | |
2631 | return -ENOMEM; | |
2632 | ||
250a918d LP |
2633 | p = strdup(path); |
2634 | if (!p) { | |
26fd040d LP |
2635 | strv_free(l); |
2636 | return -ENOMEM; | |
2637 | } | |
2638 | ||
2639 | free(c->path); | |
2640 | c->path = p; | |
2641 | ||
2642 | strv_free(c->argv); | |
2643 | c->argv = l; | |
2644 | ||
2645 | return 0; | |
2646 | } | |
2647 | ||
86b23b07 | 2648 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 2649 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 2650 | va_list ap; |
86b23b07 JS |
2651 | int r; |
2652 | ||
2653 | assert(c); | |
2654 | assert(path); | |
2655 | ||
2656 | va_start(ap, path); | |
2657 | l = strv_new_ap(path, ap); | |
2658 | va_end(ap); | |
2659 | ||
2660 | if (!l) | |
2661 | return -ENOMEM; | |
2662 | ||
2663 | r = strv_extend_strv(&c->argv, l); | |
e63ff941 | 2664 | if (r < 0) |
86b23b07 | 2665 | return r; |
86b23b07 JS |
2666 | |
2667 | return 0; | |
2668 | } | |
2669 | ||
2670 | ||
613b411c LP |
2671 | static int exec_runtime_allocate(ExecRuntime **rt) { |
2672 | ||
2673 | if (*rt) | |
2674 | return 0; | |
2675 | ||
2676 | *rt = new0(ExecRuntime, 1); | |
f146f5e1 | 2677 | if (!*rt) |
613b411c LP |
2678 | return -ENOMEM; |
2679 | ||
2680 | (*rt)->n_ref = 1; | |
2681 | (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1; | |
2682 | ||
2683 | return 0; | |
2684 | } | |
2685 | ||
2686 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) { | |
2687 | int r; | |
2688 | ||
2689 | assert(rt); | |
2690 | assert(c); | |
2691 | assert(id); | |
2692 | ||
2693 | if (*rt) | |
2694 | return 1; | |
2695 | ||
2696 | if (!c->private_network && !c->private_tmp) | |
2697 | return 0; | |
2698 | ||
2699 | r = exec_runtime_allocate(rt); | |
2700 | if (r < 0) | |
2701 | return r; | |
2702 | ||
2703 | if (c->private_network && (*rt)->netns_storage_socket[0] < 0) { | |
2704 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0) | |
2705 | return -errno; | |
2706 | } | |
2707 | ||
2708 | if (c->private_tmp && !(*rt)->tmp_dir) { | |
2709 | r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir); | |
2710 | if (r < 0) | |
2711 | return r; | |
2712 | } | |
2713 | ||
2714 | return 1; | |
2715 | } | |
2716 | ||
2717 | ExecRuntime *exec_runtime_ref(ExecRuntime *r) { | |
2718 | assert(r); | |
2719 | assert(r->n_ref > 0); | |
2720 | ||
2721 | r->n_ref++; | |
2722 | return r; | |
2723 | } | |
2724 | ||
2725 | ExecRuntime *exec_runtime_unref(ExecRuntime *r) { | |
2726 | ||
2727 | if (!r) | |
2728 | return NULL; | |
2729 | ||
2730 | assert(r->n_ref > 0); | |
2731 | ||
2732 | r->n_ref--; | |
2733 | if (r->n_ref <= 0) { | |
2734 | free(r->tmp_dir); | |
2735 | free(r->var_tmp_dir); | |
3d94f76c | 2736 | safe_close_pair(r->netns_storage_socket); |
613b411c LP |
2737 | free(r); |
2738 | } | |
2739 | ||
2740 | return NULL; | |
2741 | } | |
2742 | ||
2743 | int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds) { | |
2744 | assert(u); | |
2745 | assert(f); | |
2746 | assert(fds); | |
2747 | ||
2748 | if (!rt) | |
2749 | return 0; | |
2750 | ||
2751 | if (rt->tmp_dir) | |
2752 | unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir); | |
2753 | ||
2754 | if (rt->var_tmp_dir) | |
2755 | unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir); | |
2756 | ||
2757 | if (rt->netns_storage_socket[0] >= 0) { | |
2758 | int copy; | |
2759 | ||
2760 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); | |
2761 | if (copy < 0) | |
2762 | return copy; | |
2763 | ||
2764 | unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy); | |
2765 | } | |
2766 | ||
2767 | if (rt->netns_storage_socket[1] >= 0) { | |
2768 | int copy; | |
2769 | ||
2770 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); | |
2771 | if (copy < 0) | |
2772 | return copy; | |
2773 | ||
2774 | unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy); | |
2775 | } | |
2776 | ||
2777 | return 0; | |
2778 | } | |
2779 | ||
2780 | int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds) { | |
2781 | int r; | |
2782 | ||
2783 | assert(rt); | |
2784 | assert(key); | |
2785 | assert(value); | |
2786 | ||
2787 | if (streq(key, "tmp-dir")) { | |
2788 | char *copy; | |
2789 | ||
2790 | r = exec_runtime_allocate(rt); | |
2791 | if (r < 0) | |
2792 | return r; | |
2793 | ||
2794 | copy = strdup(value); | |
2795 | if (!copy) | |
2796 | return log_oom(); | |
2797 | ||
2798 | free((*rt)->tmp_dir); | |
2799 | (*rt)->tmp_dir = copy; | |
2800 | ||
2801 | } else if (streq(key, "var-tmp-dir")) { | |
2802 | char *copy; | |
2803 | ||
2804 | r = exec_runtime_allocate(rt); | |
2805 | if (r < 0) | |
2806 | return r; | |
2807 | ||
2808 | copy = strdup(value); | |
2809 | if (!copy) | |
2810 | return log_oom(); | |
2811 | ||
2812 | free((*rt)->var_tmp_dir); | |
2813 | (*rt)->var_tmp_dir = copy; | |
2814 | ||
2815 | } else if (streq(key, "netns-socket-0")) { | |
2816 | int fd; | |
2817 | ||
2818 | r = exec_runtime_allocate(rt); | |
2819 | if (r < 0) | |
2820 | return r; | |
2821 | ||
2822 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2823 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2824 | else { |
03e334a1 | 2825 | safe_close((*rt)->netns_storage_socket[0]); |
613b411c LP |
2826 | (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd); |
2827 | } | |
2828 | } else if (streq(key, "netns-socket-1")) { | |
2829 | int fd; | |
2830 | ||
2831 | r = exec_runtime_allocate(rt); | |
2832 | if (r < 0) | |
2833 | return r; | |
2834 | ||
2835 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2836 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2837 | else { |
03e334a1 | 2838 | safe_close((*rt)->netns_storage_socket[1]); |
613b411c LP |
2839 | (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd); |
2840 | } | |
2841 | } else | |
2842 | return 0; | |
2843 | ||
2844 | return 1; | |
2845 | } | |
2846 | ||
2847 | static void *remove_tmpdir_thread(void *p) { | |
2848 | _cleanup_free_ char *path = p; | |
2849 | ||
c6878637 | 2850 | (void) rm_rf(path, REMOVE_ROOT|REMOVE_PHYSICAL); |
613b411c LP |
2851 | return NULL; |
2852 | } | |
2853 | ||
2854 | void exec_runtime_destroy(ExecRuntime *rt) { | |
98b47d54 LP |
2855 | int r; |
2856 | ||
613b411c LP |
2857 | if (!rt) |
2858 | return; | |
2859 | ||
2860 | /* If there are multiple users of this, let's leave the stuff around */ | |
2861 | if (rt->n_ref > 1) | |
2862 | return; | |
2863 | ||
2864 | if (rt->tmp_dir) { | |
2865 | log_debug("Spawning thread to nuke %s", rt->tmp_dir); | |
98b47d54 LP |
2866 | |
2867 | r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir); | |
2868 | if (r < 0) { | |
da927ba9 | 2869 | log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir); |
98b47d54 LP |
2870 | free(rt->tmp_dir); |
2871 | } | |
2872 | ||
613b411c LP |
2873 | rt->tmp_dir = NULL; |
2874 | } | |
2875 | ||
2876 | if (rt->var_tmp_dir) { | |
2877 | log_debug("Spawning thread to nuke %s", rt->var_tmp_dir); | |
98b47d54 LP |
2878 | |
2879 | r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir); | |
2880 | if (r < 0) { | |
da927ba9 | 2881 | log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir); |
98b47d54 LP |
2882 | free(rt->var_tmp_dir); |
2883 | } | |
2884 | ||
613b411c LP |
2885 | rt->var_tmp_dir = NULL; |
2886 | } | |
2887 | ||
3d94f76c | 2888 | safe_close_pair(rt->netns_storage_socket); |
613b411c LP |
2889 | } |
2890 | ||
80876c20 LP |
2891 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
2892 | [EXEC_INPUT_NULL] = "null", | |
2893 | [EXEC_INPUT_TTY] = "tty", | |
2894 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
2895 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
2896 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
2897 | }; |
2898 | ||
8a0867d6 LP |
2899 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
2900 | ||
94f04347 | 2901 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 2902 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 2903 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 2904 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 2905 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 2906 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 2907 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 2908 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
2909 | [EXEC_OUTPUT_JOURNAL] = "journal", |
2910 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 2911 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
2912 | }; |
2913 | ||
2914 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); |