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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" |
6482f626 | 79 | #include "formats-util.h" |
0b452006 | 80 | #include "process-util.h" |
5cb5a6ff | 81 | |
2eec67ac TA |
82 | #ifdef HAVE_APPARMOR |
83 | #include "apparmor-util.h" | |
84 | #endif | |
85 | ||
57183d11 LP |
86 | #ifdef HAVE_SECCOMP |
87 | #include "seccomp-util.h" | |
88 | #endif | |
89 | ||
e056b01d | 90 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 91 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 92 | |
02a51aba LP |
93 | /* This assumes there is a 'tty' group */ |
94 | #define TTY_MODE 0620 | |
95 | ||
531dca78 LP |
96 | #define SNDBUF_SIZE (8*1024*1024) |
97 | ||
034c6ed7 LP |
98 | static int shift_fds(int fds[], unsigned n_fds) { |
99 | int start, restart_from; | |
100 | ||
101 | if (n_fds <= 0) | |
102 | return 0; | |
103 | ||
a0d40ac5 LP |
104 | /* Modifies the fds array! (sorts it) */ |
105 | ||
034c6ed7 LP |
106 | assert(fds); |
107 | ||
108 | start = 0; | |
109 | for (;;) { | |
110 | int i; | |
111 | ||
112 | restart_from = -1; | |
113 | ||
114 | for (i = start; i < (int) n_fds; i++) { | |
115 | int nfd; | |
116 | ||
117 | /* Already at right index? */ | |
118 | if (fds[i] == i+3) | |
119 | continue; | |
120 | ||
121 | if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0) | |
122 | return -errno; | |
123 | ||
03e334a1 | 124 | safe_close(fds[i]); |
034c6ed7 LP |
125 | fds[i] = nfd; |
126 | ||
127 | /* Hmm, the fd we wanted isn't free? Then | |
ee33e53a | 128 | * let's remember that and try again from here */ |
034c6ed7 LP |
129 | if (nfd != i+3 && restart_from < 0) |
130 | restart_from = i; | |
131 | } | |
132 | ||
133 | if (restart_from < 0) | |
134 | break; | |
135 | ||
136 | start = restart_from; | |
137 | } | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
c2748801 | 142 | static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) { |
47a71eed | 143 | unsigned i; |
e2c76839 | 144 | int r; |
47a71eed LP |
145 | |
146 | if (n_fds <= 0) | |
147 | return 0; | |
148 | ||
149 | assert(fds); | |
150 | ||
451a074f | 151 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */ |
47a71eed LP |
152 | |
153 | for (i = 0; i < n_fds; i++) { | |
47a71eed | 154 | |
e2c76839 LP |
155 | if ((r = fd_nonblock(fds[i], nonblock)) < 0) |
156 | return r; | |
47a71eed | 157 | |
451a074f LP |
158 | /* We unconditionally drop FD_CLOEXEC from the fds, |
159 | * since after all we want to pass these fds to our | |
160 | * children */ | |
47a71eed | 161 | |
e2c76839 LP |
162 | if ((r = fd_cloexec(fds[i], false)) < 0) |
163 | return r; | |
47a71eed LP |
164 | } |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
44a6b1b6 | 169 | _pure_ static const char *tty_path(const ExecContext *context) { |
80876c20 LP |
170 | assert(context); |
171 | ||
172 | if (context->tty_path) | |
173 | return context->tty_path; | |
174 | ||
175 | return "/dev/console"; | |
176 | } | |
177 | ||
9588bc32 | 178 | static void exec_context_tty_reset(const ExecContext *context) { |
6ea832a2 LP |
179 | assert(context); |
180 | ||
181 | if (context->tty_vhangup) | |
182 | terminal_vhangup(tty_path(context)); | |
183 | ||
184 | if (context->tty_reset) | |
185 | reset_terminal(tty_path(context)); | |
186 | ||
187 | if (context->tty_vt_disallocate && context->tty_path) | |
188 | vt_disallocate(context->tty_path); | |
189 | } | |
190 | ||
3a1286b6 MS |
191 | static bool is_terminal_output(ExecOutput o) { |
192 | return | |
193 | o == EXEC_OUTPUT_TTY || | |
194 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
195 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
196 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
197 | } | |
198 | ||
80876c20 LP |
199 | static int open_null_as(int flags, int nfd) { |
200 | int fd, r; | |
071830ff | 201 | |
80876c20 | 202 | assert(nfd >= 0); |
071830ff | 203 | |
613b411c LP |
204 | fd = open("/dev/null", flags|O_NOCTTY); |
205 | if (fd < 0) | |
071830ff LP |
206 | return -errno; |
207 | ||
80876c20 LP |
208 | if (fd != nfd) { |
209 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 210 | safe_close(fd); |
80876c20 LP |
211 | } else |
212 | r = nfd; | |
071830ff | 213 | |
80876c20 | 214 | return r; |
071830ff LP |
215 | } |
216 | ||
524daa8c | 217 | static int connect_journal_socket(int fd, uid_t uid, gid_t gid) { |
b92bea5d ZJS |
218 | union sockaddr_union sa = { |
219 | .un.sun_family = AF_UNIX, | |
220 | .un.sun_path = "/run/systemd/journal/stdout", | |
221 | }; | |
524daa8c ZJS |
222 | uid_t olduid = UID_INVALID; |
223 | gid_t oldgid = GID_INVALID; | |
224 | int r; | |
225 | ||
226 | if (gid != GID_INVALID) { | |
227 | oldgid = getgid(); | |
228 | ||
229 | r = setegid(gid); | |
230 | if (r < 0) | |
231 | return -errno; | |
232 | } | |
233 | ||
234 | if (uid != UID_INVALID) { | |
235 | olduid = getuid(); | |
236 | ||
237 | r = seteuid(uid); | |
238 | if (r < 0) { | |
239 | r = -errno; | |
240 | goto restore_gid; | |
241 | } | |
242 | } | |
243 | ||
244 | r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); | |
245 | if (r < 0) | |
246 | r = -errno; | |
247 | ||
248 | /* If we fail to restore the uid or gid, things will likely | |
249 | fail later on. This should only happen if an LSM interferes. */ | |
250 | ||
251 | if (uid != UID_INVALID) | |
252 | (void) seteuid(olduid); | |
253 | ||
254 | restore_gid: | |
255 | if (gid != GID_INVALID) | |
256 | (void) setegid(oldgid); | |
257 | ||
258 | return r; | |
259 | } | |
260 | ||
261 | 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) { | |
262 | int fd, r; | |
071830ff LP |
263 | |
264 | assert(context); | |
80876c20 LP |
265 | assert(output < _EXEC_OUTPUT_MAX); |
266 | assert(ident); | |
267 | assert(nfd >= 0); | |
071830ff | 268 | |
54fe0cdb LP |
269 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
270 | if (fd < 0) | |
80876c20 | 271 | return -errno; |
071830ff | 272 | |
524daa8c ZJS |
273 | r = connect_journal_socket(fd, uid, gid); |
274 | if (r < 0) | |
275 | return r; | |
071830ff | 276 | |
80876c20 | 277 | if (shutdown(fd, SHUT_RD) < 0) { |
03e334a1 | 278 | safe_close(fd); |
80876c20 LP |
279 | return -errno; |
280 | } | |
071830ff | 281 | |
531dca78 LP |
282 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
283 | ||
80876c20 | 284 | dprintf(fd, |
62bca2c6 | 285 | "%s\n" |
80876c20 LP |
286 | "%s\n" |
287 | "%i\n" | |
54fe0cdb LP |
288 | "%i\n" |
289 | "%i\n" | |
290 | "%i\n" | |
4f4a1dbf | 291 | "%i\n", |
4f4a1dbf | 292 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 293 | unit_id, |
54fe0cdb LP |
294 | context->syslog_priority, |
295 | !!context->syslog_level_prefix, | |
296 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
297 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 298 | is_terminal_output(output)); |
80876c20 LP |
299 | |
300 | if (fd != nfd) { | |
301 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 302 | safe_close(fd); |
80876c20 LP |
303 | } else |
304 | r = nfd; | |
071830ff | 305 | |
80876c20 LP |
306 | return r; |
307 | } | |
308 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
309 | int fd, r; | |
071830ff | 310 | |
80876c20 LP |
311 | assert(path); |
312 | assert(nfd >= 0); | |
071830ff | 313 | |
80876c20 LP |
314 | if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0) |
315 | return fd; | |
071830ff | 316 | |
80876c20 LP |
317 | if (fd != nfd) { |
318 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 319 | safe_close(fd); |
80876c20 LP |
320 | } else |
321 | r = nfd; | |
071830ff | 322 | |
80876c20 LP |
323 | return r; |
324 | } | |
071830ff | 325 | |
80876c20 LP |
326 | static bool is_terminal_input(ExecInput i) { |
327 | return | |
328 | i == EXEC_INPUT_TTY || | |
329 | i == EXEC_INPUT_TTY_FORCE || | |
330 | i == EXEC_INPUT_TTY_FAIL; | |
331 | } | |
071830ff | 332 | |
1e3ad081 LP |
333 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
334 | ||
335 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
336 | return EXEC_INPUT_NULL; | |
071830ff | 337 | |
03fd9c49 | 338 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
339 | return EXEC_INPUT_NULL; |
340 | ||
03fd9c49 | 341 | return std_input; |
4f2d528d LP |
342 | } |
343 | ||
03fd9c49 | 344 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 345 | |
03fd9c49 | 346 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
347 | return EXEC_OUTPUT_INHERIT; |
348 | ||
03fd9c49 | 349 | return std_output; |
4f2d528d LP |
350 | } |
351 | ||
1e3ad081 | 352 | static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) { |
4f2d528d LP |
353 | ExecInput i; |
354 | ||
355 | assert(context); | |
356 | ||
1e3ad081 | 357 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
4f2d528d LP |
358 | |
359 | switch (i) { | |
071830ff | 360 | |
80876c20 LP |
361 | case EXEC_INPUT_NULL: |
362 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
363 | ||
364 | case EXEC_INPUT_TTY: | |
365 | case EXEC_INPUT_TTY_FORCE: | |
366 | case EXEC_INPUT_TTY_FAIL: { | |
367 | int fd, r; | |
071830ff | 368 | |
970edce6 ZJS |
369 | fd = acquire_terminal(tty_path(context), |
370 | i == EXEC_INPUT_TTY_FAIL, | |
371 | i == EXEC_INPUT_TTY_FORCE, | |
372 | false, | |
3a43da28 | 373 | USEC_INFINITY); |
970edce6 | 374 | if (fd < 0) |
80876c20 LP |
375 | return fd; |
376 | ||
377 | if (fd != STDIN_FILENO) { | |
378 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
03e334a1 | 379 | safe_close(fd); |
80876c20 LP |
380 | } else |
381 | r = STDIN_FILENO; | |
382 | ||
383 | return r; | |
384 | } | |
385 | ||
4f2d528d LP |
386 | case EXEC_INPUT_SOCKET: |
387 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
388 | ||
80876c20 LP |
389 | default: |
390 | assert_not_reached("Unknown input type"); | |
391 | } | |
392 | } | |
393 | ||
524daa8c | 394 | 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 |
395 | ExecOutput o; |
396 | ExecInput i; | |
47c1d80d | 397 | int r; |
4f2d528d | 398 | |
80876c20 LP |
399 | assert(context); |
400 | assert(ident); | |
401 | ||
1e3ad081 | 402 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
03fd9c49 | 403 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 404 | |
eb17e935 MS |
405 | if (fileno == STDERR_FILENO) { |
406 | ExecOutput e; | |
407 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 408 | |
eb17e935 MS |
409 | /* This expects the input and output are already set up */ |
410 | ||
411 | /* Don't change the stderr file descriptor if we inherit all | |
412 | * the way and are not on a tty */ | |
413 | if (e == EXEC_OUTPUT_INHERIT && | |
414 | o == EXEC_OUTPUT_INHERIT && | |
415 | i == EXEC_INPUT_NULL && | |
416 | !is_terminal_input(context->std_input) && | |
417 | getppid () != 1) | |
418 | return fileno; | |
419 | ||
420 | /* Duplicate from stdout if possible */ | |
421 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
422 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 423 | |
eb17e935 | 424 | o = e; |
80876c20 | 425 | |
eb17e935 | 426 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
427 | /* If input got downgraded, inherit the original value */ |
428 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
eb17e935 | 429 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 430 | |
acb591e4 | 431 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 432 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 433 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 434 | |
acb591e4 LP |
435 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
436 | if (getppid() != 1) | |
eb17e935 | 437 | return fileno; |
94f04347 | 438 | |
eb17e935 MS |
439 | /* We need to open /dev/null here anew, to get the right access mode. */ |
440 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 441 | } |
94f04347 | 442 | |
eb17e935 | 443 | switch (o) { |
80876c20 LP |
444 | |
445 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 446 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
447 | |
448 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 449 | if (is_terminal_input(i)) |
eb17e935 | 450 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
451 | |
452 | /* We don't reset the terminal if this is just about output */ | |
eb17e935 | 453 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
454 | |
455 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 456 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 457 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 458 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
459 | case EXEC_OUTPUT_JOURNAL: |
460 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
524daa8c | 461 | r = connect_logger_as(context, o, ident, unit_id, fileno, uid, gid); |
47c1d80d | 462 | if (r < 0) { |
e2cc6eca | 463 | log_unit_struct(unit_id, |
524daa8c | 464 | LOG_ERR, |
e2cc6eca LP |
465 | LOG_MESSAGE("Failed to connect %s of %s to the journal socket: %s", |
466 | fileno == STDOUT_FILENO ? "stdout" : "stderr", | |
467 | unit_id, strerror(-r)), | |
468 | LOG_ERRNO(-r), | |
469 | NULL); | |
eb17e935 | 470 | r = open_null_as(O_WRONLY, fileno); |
47c1d80d MS |
471 | } |
472 | return r; | |
4f2d528d LP |
473 | |
474 | case EXEC_OUTPUT_SOCKET: | |
475 | assert(socket_fd >= 0); | |
eb17e935 | 476 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
477 | |
478 | default: | |
80876c20 | 479 | assert_not_reached("Unknown error type"); |
94f04347 | 480 | } |
071830ff LP |
481 | } |
482 | ||
02a51aba LP |
483 | static int chown_terminal(int fd, uid_t uid) { |
484 | struct stat st; | |
485 | ||
486 | assert(fd >= 0); | |
02a51aba LP |
487 | |
488 | /* This might fail. What matters are the results. */ | |
bab45044 LP |
489 | (void) fchown(fd, uid, -1); |
490 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
491 | |
492 | if (fstat(fd, &st) < 0) | |
493 | return -errno; | |
494 | ||
d8b4e2e9 | 495 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
496 | return -EPERM; |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
af6da548 | 501 | static int setup_confirm_stdio(int *_saved_stdin, |
80876c20 LP |
502 | int *_saved_stdout) { |
503 | int fd = -1, saved_stdin, saved_stdout = -1, r; | |
504 | ||
80876c20 LP |
505 | assert(_saved_stdin); |
506 | assert(_saved_stdout); | |
507 | ||
af6da548 LP |
508 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
509 | if (saved_stdin < 0) | |
510 | return -errno; | |
80876c20 | 511 | |
af6da548 LP |
512 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
513 | if (saved_stdout < 0) { | |
514 | r = errno; | |
80876c20 LP |
515 | goto fail; |
516 | } | |
517 | ||
af6da548 LP |
518 | fd = acquire_terminal( |
519 | "/dev/console", | |
520 | false, | |
521 | false, | |
522 | false, | |
523 | DEFAULT_CONFIRM_USEC); | |
524 | if (fd < 0) { | |
525 | r = fd; | |
80876c20 LP |
526 | goto fail; |
527 | } | |
528 | ||
af6da548 LP |
529 | r = chown_terminal(fd, getuid()); |
530 | if (r < 0) | |
02a51aba | 531 | goto fail; |
02a51aba | 532 | |
80876c20 | 533 | if (dup2(fd, STDIN_FILENO) < 0) { |
af6da548 | 534 | r = -errno; |
80876c20 LP |
535 | goto fail; |
536 | } | |
537 | ||
538 | if (dup2(fd, STDOUT_FILENO) < 0) { | |
af6da548 | 539 | r = -errno; |
80876c20 LP |
540 | goto fail; |
541 | } | |
542 | ||
543 | if (fd >= 2) | |
03e334a1 | 544 | safe_close(fd); |
80876c20 LP |
545 | |
546 | *_saved_stdin = saved_stdin; | |
547 | *_saved_stdout = saved_stdout; | |
548 | ||
549 | return 0; | |
550 | ||
551 | fail: | |
03e334a1 LP |
552 | safe_close(saved_stdout); |
553 | safe_close(saved_stdin); | |
554 | safe_close(fd); | |
80876c20 LP |
555 | |
556 | return r; | |
557 | } | |
558 | ||
44b601bc | 559 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
03e334a1 | 560 | _cleanup_close_ int fd = -1; |
af6da548 | 561 | va_list ap; |
80876c20 | 562 | |
af6da548 | 563 | assert(format); |
80876c20 | 564 | |
af6da548 LP |
565 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
566 | if (fd < 0) | |
567 | return fd; | |
80876c20 | 568 | |
af6da548 LP |
569 | va_start(ap, format); |
570 | vdprintf(fd, format, ap); | |
571 | va_end(ap); | |
80876c20 | 572 | |
af6da548 LP |
573 | return 0; |
574 | } | |
80876c20 | 575 | |
af6da548 LP |
576 | static int restore_confirm_stdio(int *saved_stdin, |
577 | int *saved_stdout) { | |
80876c20 | 578 | |
af6da548 | 579 | int r = 0; |
80876c20 | 580 | |
af6da548 LP |
581 | assert(saved_stdin); |
582 | assert(saved_stdout); | |
583 | ||
584 | release_terminal(); | |
585 | ||
586 | if (*saved_stdin >= 0) | |
80876c20 | 587 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 588 | r = -errno; |
80876c20 | 589 | |
af6da548 | 590 | if (*saved_stdout >= 0) |
80876c20 | 591 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 592 | r = -errno; |
80876c20 | 593 | |
03e334a1 LP |
594 | safe_close(*saved_stdin); |
595 | safe_close(*saved_stdout); | |
af6da548 LP |
596 | |
597 | return r; | |
598 | } | |
599 | ||
600 | static int ask_for_confirmation(char *response, char **argv) { | |
601 | int saved_stdout = -1, saved_stdin = -1, r; | |
e1d75803 | 602 | _cleanup_free_ char *line = NULL; |
af6da548 LP |
603 | |
604 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
605 | if (r < 0) | |
606 | return r; | |
607 | ||
608 | line = exec_command_line(argv); | |
609 | if (!line) | |
610 | return -ENOMEM; | |
611 | ||
418b9be5 | 612 | r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line); |
af6da548 LP |
613 | |
614 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
615 | ||
616 | return r; | |
80876c20 LP |
617 | } |
618 | ||
81a2b7ce LP |
619 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
620 | bool keep_groups = false; | |
621 | int r; | |
622 | ||
623 | assert(context); | |
624 | ||
35b8ca3a | 625 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
626 | * we avoid NSS lookups for gid=0. */ |
627 | ||
628 | if (context->group || username) { | |
629 | ||
4b67834e LP |
630 | if (context->group) { |
631 | const char *g = context->group; | |
632 | ||
633 | if ((r = get_group_creds(&g, &gid)) < 0) | |
81a2b7ce | 634 | return r; |
4b67834e | 635 | } |
81a2b7ce LP |
636 | |
637 | /* First step, initialize groups from /etc/groups */ | |
638 | if (username && gid != 0) { | |
639 | if (initgroups(username, gid) < 0) | |
640 | return -errno; | |
641 | ||
642 | keep_groups = true; | |
643 | } | |
644 | ||
645 | /* Second step, set our gids */ | |
646 | if (setresgid(gid, gid, gid) < 0) | |
647 | return -errno; | |
648 | } | |
649 | ||
650 | if (context->supplementary_groups) { | |
651 | int ngroups_max, k; | |
652 | gid_t *gids; | |
653 | char **i; | |
654 | ||
655 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 656 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
657 | |
658 | if (!(gids = new(gid_t, ngroups_max))) | |
659 | return -ENOMEM; | |
660 | ||
661 | if (keep_groups) { | |
662 | if ((k = getgroups(ngroups_max, gids)) < 0) { | |
663 | free(gids); | |
664 | return -errno; | |
665 | } | |
666 | } else | |
667 | k = 0; | |
668 | ||
669 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 670 | const char *g; |
81a2b7ce LP |
671 | |
672 | if (k >= ngroups_max) { | |
673 | free(gids); | |
674 | return -E2BIG; | |
675 | } | |
676 | ||
4b67834e LP |
677 | g = *i; |
678 | r = get_group_creds(&g, gids+k); | |
679 | if (r < 0) { | |
81a2b7ce LP |
680 | free(gids); |
681 | return r; | |
682 | } | |
683 | ||
684 | k++; | |
685 | } | |
686 | ||
687 | if (setgroups(k, gids) < 0) { | |
688 | free(gids); | |
689 | return -errno; | |
690 | } | |
691 | ||
692 | free(gids); | |
693 | } | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
81a2b7ce LP |
699 | assert(context); |
700 | ||
701 | /* Sets (but doesn't lookup) the uid and make sure we keep the | |
702 | * capabilities while doing so. */ | |
703 | ||
704 | if (context->capabilities) { | |
5ce70e5b | 705 | _cleanup_cap_free_ cap_t d = NULL; |
81a2b7ce LP |
706 | static const cap_value_t bits[] = { |
707 | CAP_SETUID, /* Necessary so that we can run setresuid() below */ | |
708 | CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */ | |
709 | }; | |
710 | ||
711 | /* First step: If we need to keep capabilities but | |
712 | * drop privileges we need to make sure we keep our | |
cbb21cca | 713 | * caps, while we drop privileges. */ |
693ced48 | 714 | if (uid != 0) { |
cbb21cca | 715 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
716 | |
717 | if (prctl(PR_GET_SECUREBITS) != sb) | |
718 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
719 | return -errno; | |
720 | } | |
81a2b7ce | 721 | |
35b8ca3a | 722 | /* Second step: set the capabilities. This will reduce |
81a2b7ce LP |
723 | * the capabilities to the minimum we need. */ |
724 | ||
5ce70e5b ZJS |
725 | d = cap_dup(context->capabilities); |
726 | if (!d) | |
81a2b7ce LP |
727 | return -errno; |
728 | ||
729 | if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 || | |
5ce70e5b ZJS |
730 | cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) |
731 | return -errno; | |
81a2b7ce | 732 | |
5ce70e5b ZJS |
733 | if (cap_set_proc(d) < 0) |
734 | return -errno; | |
81a2b7ce LP |
735 | } |
736 | ||
737 | /* Third step: actually set the uids */ | |
738 | if (setresuid(uid, uid, uid) < 0) | |
739 | return -errno; | |
740 | ||
741 | /* At this point we should have all necessary capabilities but | |
742 | are otherwise a normal user. However, the caps might got | |
743 | corrupted due to the setresuid() so we need clean them up | |
744 | later. This is done outside of this call. */ | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
5b6319dc LP |
749 | #ifdef HAVE_PAM |
750 | ||
751 | static int null_conv( | |
752 | int num_msg, | |
753 | const struct pam_message **msg, | |
754 | struct pam_response **resp, | |
755 | void *appdata_ptr) { | |
756 | ||
757 | /* We don't support conversations */ | |
758 | ||
759 | return PAM_CONV_ERR; | |
760 | } | |
761 | ||
762 | static int setup_pam( | |
763 | const char *name, | |
764 | const char *user, | |
940c5210 | 765 | uid_t uid, |
5b6319dc LP |
766 | const char *tty, |
767 | char ***pam_env, | |
768 | int fds[], unsigned n_fds) { | |
769 | ||
770 | static const struct pam_conv conv = { | |
771 | .conv = null_conv, | |
772 | .appdata_ptr = NULL | |
773 | }; | |
774 | ||
775 | pam_handle_t *handle = NULL; | |
776 | sigset_t ss, old_ss; | |
777 | int pam_code = PAM_SUCCESS; | |
9ba35398 | 778 | int err; |
5b6319dc LP |
779 | char **e = NULL; |
780 | bool close_session = false; | |
781 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 782 | int flags = 0; |
5b6319dc LP |
783 | |
784 | assert(name); | |
785 | assert(user); | |
786 | assert(pam_env); | |
787 | ||
788 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 789 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
790 | * systemd via the cgroup logic. It will then remove the PAM |
791 | * session again. The parent process will exec() the actual | |
792 | * daemon. We do things this way to ensure that the main PID | |
793 | * of the daemon is the one we initially fork()ed. */ | |
794 | ||
553d2243 | 795 | if (log_get_max_level() < LOG_DEBUG) |
970edce6 ZJS |
796 | flags |= PAM_SILENT; |
797 | ||
f546241b ZJS |
798 | pam_code = pam_start(name, user, &conv, &handle); |
799 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
800 | handle = NULL; |
801 | goto fail; | |
802 | } | |
803 | ||
f546241b ZJS |
804 | if (tty) { |
805 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
806 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 807 | goto fail; |
f546241b | 808 | } |
5b6319dc | 809 | |
970edce6 | 810 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 811 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
812 | goto fail; |
813 | ||
970edce6 | 814 | pam_code = pam_open_session(handle, flags); |
f546241b | 815 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
816 | goto fail; |
817 | ||
818 | close_session = true; | |
819 | ||
f546241b ZJS |
820 | e = pam_getenvlist(handle); |
821 | if (!e) { | |
5b6319dc LP |
822 | pam_code = PAM_BUF_ERR; |
823 | goto fail; | |
824 | } | |
825 | ||
826 | /* Block SIGTERM, so that we know that it won't get lost in | |
827 | * the child */ | |
828 | if (sigemptyset(&ss) < 0 || | |
829 | sigaddset(&ss, SIGTERM) < 0 || | |
830 | sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0) | |
831 | goto fail; | |
832 | ||
833 | parent_pid = getpid(); | |
834 | ||
f546241b ZJS |
835 | pam_pid = fork(); |
836 | if (pam_pid < 0) | |
5b6319dc LP |
837 | goto fail; |
838 | ||
839 | if (pam_pid == 0) { | |
840 | int sig; | |
841 | int r = EXIT_PAM; | |
842 | ||
843 | /* The child's job is to reset the PAM session on | |
844 | * termination */ | |
845 | ||
846 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
847 | * of "/sbin/init"), to look pretty in /bin/ps */ |
848 | rename_process("(sd-pam)"); | |
5b6319dc LP |
849 | |
850 | /* Make sure we don't keep open the passed fds in this | |
851 | child. We assume that otherwise only those fds are | |
852 | open here that have been opened by PAM. */ | |
853 | close_many(fds, n_fds); | |
854 | ||
940c5210 AK |
855 | /* Drop privileges - we don't need any to pam_close_session |
856 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
857 | * If this fails, ignore the error - but expect sd-pam threads | |
858 | * to fail to exit normally */ | |
859 | if (setresuid(uid, uid, uid) < 0) | |
da927ba9 | 860 | log_error_errno(r, "Error: Failed to setresuid() in sd-pam: %m"); |
940c5210 AK |
861 | |
862 | /* Wait until our parent died. This will only work if | |
863 | * the above setresuid() succeeds, otherwise the kernel | |
864 | * will not allow unprivileged parents kill their privileged | |
865 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
866 | * to do the rest for us. */ |
867 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
868 | goto child_finish; | |
869 | ||
870 | /* Check if our parent process might already have | |
871 | * died? */ | |
872 | if (getppid() == parent_pid) { | |
3dead8d9 LP |
873 | for (;;) { |
874 | if (sigwait(&ss, &sig) < 0) { | |
875 | if (errno == EINTR) | |
876 | continue; | |
877 | ||
878 | goto child_finish; | |
879 | } | |
5b6319dc | 880 | |
3dead8d9 LP |
881 | assert(sig == SIGTERM); |
882 | break; | |
883 | } | |
5b6319dc LP |
884 | } |
885 | ||
3dead8d9 | 886 | /* If our parent died we'll end the session */ |
f546241b | 887 | if (getppid() != parent_pid) { |
970edce6 | 888 | pam_code = pam_close_session(handle, flags); |
f546241b | 889 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 890 | goto child_finish; |
f546241b | 891 | } |
5b6319dc LP |
892 | |
893 | r = 0; | |
894 | ||
895 | child_finish: | |
970edce6 | 896 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
897 | _exit(r); |
898 | } | |
899 | ||
900 | /* If the child was forked off successfully it will do all the | |
901 | * cleanups, so forget about the handle here. */ | |
902 | handle = NULL; | |
903 | ||
3b8bddde | 904 | /* Unblock SIGTERM again in the parent */ |
5b6319dc LP |
905 | if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0) |
906 | goto fail; | |
907 | ||
908 | /* We close the log explicitly here, since the PAM modules | |
909 | * might have opened it, but we don't want this fd around. */ | |
910 | closelog(); | |
911 | ||
aa87e624 LP |
912 | *pam_env = e; |
913 | e = NULL; | |
914 | ||
5b6319dc LP |
915 | return 0; |
916 | ||
917 | fail: | |
970edce6 ZJS |
918 | if (pam_code != PAM_SUCCESS) { |
919 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
9ba35398 | 920 | err = -EPERM; /* PAM errors do not map to errno */ |
970edce6 | 921 | } else { |
56f64d95 | 922 | log_error_errno(errno, "PAM failed: %m"); |
9ba35398 | 923 | err = -errno; |
970edce6 | 924 | } |
9ba35398 | 925 | |
5b6319dc LP |
926 | if (handle) { |
927 | if (close_session) | |
970edce6 | 928 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 929 | |
970edce6 | 930 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
931 | } |
932 | ||
933 | strv_free(e); | |
934 | ||
935 | closelog(); | |
936 | ||
430c18ed | 937 | if (pam_pid > 1) { |
5b6319dc | 938 | kill(pam_pid, SIGTERM); |
430c18ed LP |
939 | kill(pam_pid, SIGCONT); |
940 | } | |
5b6319dc | 941 | |
9ba35398 | 942 | return err; |
5b6319dc LP |
943 | } |
944 | #endif | |
945 | ||
5d6b1584 LP |
946 | static void rename_process_from_path(const char *path) { |
947 | char process_name[11]; | |
948 | const char *p; | |
949 | size_t l; | |
950 | ||
951 | /* This resulting string must fit in 10 chars (i.e. the length | |
952 | * of "/sbin/init") to look pretty in /bin/ps */ | |
953 | ||
2b6bf07d | 954 | p = basename(path); |
5d6b1584 LP |
955 | if (isempty(p)) { |
956 | rename_process("(...)"); | |
957 | return; | |
958 | } | |
959 | ||
960 | l = strlen(p); | |
961 | if (l > 8) { | |
962 | /* The end of the process name is usually more | |
963 | * interesting, since the first bit might just be | |
964 | * "systemd-" */ | |
965 | p = p + l - 8; | |
966 | l = 8; | |
967 | } | |
968 | ||
969 | process_name[0] = '('; | |
970 | memcpy(process_name+1, p, l); | |
971 | process_name[1+l] = ')'; | |
972 | process_name[1+l+1] = 0; | |
973 | ||
974 | rename_process(process_name); | |
975 | } | |
976 | ||
c0467cf3 | 977 | #ifdef HAVE_SECCOMP |
17df7223 | 978 | |
822a5960 | 979 | static int apply_seccomp(const ExecContext *c) { |
17df7223 LP |
980 | uint32_t negative_action, action; |
981 | scmp_filter_ctx *seccomp; | |
c0467cf3 RC |
982 | Iterator i; |
983 | void *id; | |
17df7223 | 984 | int r; |
8351ceae | 985 | |
c0467cf3 | 986 | assert(c); |
8351ceae | 987 | |
17df7223 LP |
988 | negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); |
989 | ||
990 | seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); | |
991 | if (!seccomp) | |
992 | return -ENOMEM; | |
8351ceae | 993 | |
e9642be2 LP |
994 | if (c->syscall_archs) { |
995 | ||
996 | SET_FOREACH(id, c->syscall_archs, i) { | |
997 | r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); | |
998 | if (r == -EEXIST) | |
999 | continue; | |
7c66bae2 LP |
1000 | if (r < 0) |
1001 | goto finish; | |
e9642be2 | 1002 | } |
e9642be2 | 1003 | |
7c66bae2 | 1004 | } else { |
e9642be2 | 1005 | r = seccomp_add_secondary_archs(seccomp); |
7c66bae2 LP |
1006 | if (r < 0) |
1007 | goto finish; | |
57183d11 | 1008 | } |
8351ceae | 1009 | |
57183d11 | 1010 | action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action; |
17df7223 LP |
1011 | SET_FOREACH(id, c->syscall_filter, i) { |
1012 | r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0); | |
7c66bae2 LP |
1013 | if (r < 0) |
1014 | goto finish; | |
c0467cf3 | 1015 | } |
8351ceae | 1016 | |
7c66bae2 LP |
1017 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); |
1018 | if (r < 0) | |
1019 | goto finish; | |
1020 | ||
17df7223 | 1021 | r = seccomp_load(seccomp); |
7c66bae2 LP |
1022 | |
1023 | finish: | |
17df7223 | 1024 | seccomp_release(seccomp); |
4298d0b5 LP |
1025 | return r; |
1026 | } | |
1027 | ||
822a5960 | 1028 | static int apply_address_families(const ExecContext *c) { |
4298d0b5 LP |
1029 | scmp_filter_ctx *seccomp; |
1030 | Iterator i; | |
1031 | int r; | |
1032 | ||
1033 | assert(c); | |
1034 | ||
1035 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1036 | if (!seccomp) | |
1037 | return -ENOMEM; | |
1038 | ||
1039 | r = seccomp_add_secondary_archs(seccomp); | |
1040 | if (r < 0) | |
1041 | goto finish; | |
1042 | ||
1043 | if (c->address_families_whitelist) { | |
1044 | int af, first = 0, last = 0; | |
1045 | void *afp; | |
1046 | ||
1047 | /* If this is a whitelist, we first block the address | |
1048 | * families that are out of range and then everything | |
1049 | * that is not in the set. First, we find the lowest | |
1050 | * and highest address family in the set. */ | |
1051 | ||
1052 | SET_FOREACH(afp, c->address_families, i) { | |
1053 | af = PTR_TO_INT(afp); | |
17df7223 | 1054 | |
4298d0b5 LP |
1055 | if (af <= 0 || af >= af_max()) |
1056 | continue; | |
1057 | ||
1058 | if (first == 0 || af < first) | |
1059 | first = af; | |
1060 | ||
1061 | if (last == 0 || af > last) | |
1062 | last = af; | |
1063 | } | |
1064 | ||
1065 | assert((first == 0) == (last == 0)); | |
1066 | ||
1067 | if (first == 0) { | |
1068 | ||
1069 | /* No entries in the valid range, block everything */ | |
1070 | r = seccomp_rule_add( | |
1071 | seccomp, | |
1072 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1073 | SCMP_SYS(socket), | |
1074 | 0); | |
1075 | if (r < 0) | |
1076 | goto finish; | |
1077 | ||
1078 | } else { | |
1079 | ||
1080 | /* Block everything below the first entry */ | |
1081 | r = seccomp_rule_add( | |
1082 | seccomp, | |
1083 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1084 | SCMP_SYS(socket), | |
1085 | 1, | |
1086 | SCMP_A0(SCMP_CMP_LT, first)); | |
1087 | if (r < 0) | |
1088 | goto finish; | |
1089 | ||
1090 | /* Block everything above the last entry */ | |
1091 | r = seccomp_rule_add( | |
1092 | seccomp, | |
1093 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1094 | SCMP_SYS(socket), | |
1095 | 1, | |
1096 | SCMP_A0(SCMP_CMP_GT, last)); | |
1097 | if (r < 0) | |
1098 | goto finish; | |
1099 | ||
1100 | /* Block everything between the first and last | |
1101 | * entry */ | |
1102 | for (af = 1; af < af_max(); af++) { | |
1103 | ||
1104 | if (set_contains(c->address_families, INT_TO_PTR(af))) | |
1105 | continue; | |
1106 | ||
1107 | r = seccomp_rule_add( | |
1108 | seccomp, | |
1109 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1110 | SCMP_SYS(socket), | |
1111 | 1, | |
1112 | SCMP_A0(SCMP_CMP_EQ, af)); | |
1113 | if (r < 0) | |
1114 | goto finish; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | } else { | |
1119 | void *af; | |
1120 | ||
1121 | /* If this is a blacklist, then generate one rule for | |
1122 | * each address family that are then combined in OR | |
1123 | * checks. */ | |
1124 | ||
1125 | SET_FOREACH(af, c->address_families, i) { | |
1126 | ||
1127 | r = seccomp_rule_add( | |
1128 | seccomp, | |
1129 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1130 | SCMP_SYS(socket), | |
1131 | 1, | |
1132 | SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af))); | |
1133 | if (r < 0) | |
1134 | goto finish; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1139 | if (r < 0) | |
1140 | goto finish; | |
1141 | ||
1142 | r = seccomp_load(seccomp); | |
1143 | ||
1144 | finish: | |
1145 | seccomp_release(seccomp); | |
17df7223 | 1146 | return r; |
8351ceae | 1147 | } |
4298d0b5 | 1148 | |
c0467cf3 | 1149 | #endif |
8351ceae | 1150 | |
31a7eb86 ZJS |
1151 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
1152 | assert(idle_pipe); | |
1153 | ||
03e334a1 LP |
1154 | |
1155 | safe_close(idle_pipe[1]); | |
1156 | safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1157 | |
1158 | if (idle_pipe[0] >= 0) { | |
1159 | int r; | |
1160 | ||
1161 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1162 | ||
1163 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
1164 | /* Signal systemd that we are bored and want to continue. */ | |
cd972d69 ZJS |
1165 | r = write(idle_pipe[3], "x", 1); |
1166 | if (r > 0) | |
1167 | /* Wait for systemd to react to the signal above. */ | |
1168 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
31a7eb86 ZJS |
1169 | } |
1170 | ||
03e334a1 | 1171 | safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1172 | |
1173 | } | |
1174 | ||
03e334a1 | 1175 | safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1176 | } |
1177 | ||
7cae38c4 | 1178 | static int build_environment( |
9fa95f85 | 1179 | const ExecContext *c, |
7cae38c4 | 1180 | unsigned n_fds, |
09812eb7 | 1181 | usec_t watchdog_usec, |
7cae38c4 LP |
1182 | const char *home, |
1183 | const char *username, | |
1184 | const char *shell, | |
1185 | char ***ret) { | |
1186 | ||
1187 | _cleanup_strv_free_ char **our_env = NULL; | |
1188 | unsigned n_env = 0; | |
1189 | char *x; | |
1190 | ||
1191 | assert(c); | |
1192 | assert(ret); | |
1193 | ||
09812eb7 | 1194 | our_env = new0(char*, 10); |
7cae38c4 LP |
1195 | if (!our_env) |
1196 | return -ENOMEM; | |
1197 | ||
1198 | if (n_fds > 0) { | |
ccd06097 | 1199 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0) |
7cae38c4 LP |
1200 | return -ENOMEM; |
1201 | our_env[n_env++] = x; | |
1202 | ||
1203 | if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0) | |
1204 | return -ENOMEM; | |
1205 | our_env[n_env++] = x; | |
1206 | } | |
1207 | ||
09812eb7 | 1208 | if (watchdog_usec > 0) { |
ccd06097 | 1209 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0) |
09812eb7 LP |
1210 | return -ENOMEM; |
1211 | our_env[n_env++] = x; | |
1212 | ||
de0671ee | 1213 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, watchdog_usec) < 0) |
09812eb7 LP |
1214 | return -ENOMEM; |
1215 | our_env[n_env++] = x; | |
1216 | } | |
1217 | ||
7cae38c4 LP |
1218 | if (home) { |
1219 | x = strappend("HOME=", home); | |
1220 | if (!x) | |
1221 | return -ENOMEM; | |
1222 | our_env[n_env++] = x; | |
1223 | } | |
1224 | ||
1225 | if (username) { | |
1226 | x = strappend("LOGNAME=", username); | |
1227 | if (!x) | |
1228 | return -ENOMEM; | |
1229 | our_env[n_env++] = x; | |
1230 | ||
1231 | x = strappend("USER=", username); | |
1232 | if (!x) | |
1233 | return -ENOMEM; | |
1234 | our_env[n_env++] = x; | |
1235 | } | |
1236 | ||
1237 | if (shell) { | |
1238 | x = strappend("SHELL=", shell); | |
1239 | if (!x) | |
1240 | return -ENOMEM; | |
1241 | our_env[n_env++] = x; | |
1242 | } | |
1243 | ||
1244 | if (is_terminal_input(c->std_input) || | |
1245 | c->std_output == EXEC_OUTPUT_TTY || | |
1246 | c->std_error == EXEC_OUTPUT_TTY || | |
1247 | c->tty_path) { | |
1248 | ||
1249 | x = strdup(default_term_for_tty(tty_path(c))); | |
1250 | if (!x) | |
1251 | return -ENOMEM; | |
1252 | our_env[n_env++] = x; | |
1253 | } | |
1254 | ||
1255 | our_env[n_env++] = NULL; | |
09812eb7 | 1256 | assert(n_env <= 10); |
7cae38c4 LP |
1257 | |
1258 | *ret = our_env; | |
1259 | our_env = NULL; | |
1260 | ||
1261 | return 0; | |
1262 | } | |
1263 | ||
ff0af2a1 LP |
1264 | static int exec_child( |
1265 | ExecCommand *command, | |
1266 | const ExecContext *context, | |
1267 | const ExecParameters *params, | |
1268 | ExecRuntime *runtime, | |
1269 | char **argv, | |
1270 | int socket_fd, | |
1271 | int *fds, unsigned n_fds, | |
1272 | char **files_env, | |
1273 | int *exit_status) { | |
d35fbf6b DM |
1274 | |
1275 | _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL; | |
9008e1ac | 1276 | _cleanup_free_ char *mac_selinux_context_net = NULL; |
d35fbf6b DM |
1277 | const char *username = NULL, *home = NULL, *shell = NULL; |
1278 | unsigned n_dont_close = 0; | |
e44da745 | 1279 | int dont_close[n_fds + 4]; |
fed1e721 LP |
1280 | uid_t uid = UID_INVALID; |
1281 | gid_t gid = GID_INVALID; | |
ff0af2a1 | 1282 | int i, r; |
034c6ed7 | 1283 | |
5cb5a6ff LP |
1284 | assert(command); |
1285 | assert(context); | |
d35fbf6b | 1286 | assert(params); |
ff0af2a1 | 1287 | assert(exit_status); |
d35fbf6b DM |
1288 | |
1289 | rename_process_from_path(command->path); | |
1290 | ||
1291 | /* We reset exactly these signals, since they are the | |
1292 | * only ones we set to SIG_IGN in the main daemon. All | |
1293 | * others we leave untouched because we set them to | |
1294 | * SIG_DFL or a valid handler initially, both of which | |
1295 | * will be demoted to SIG_DFL. */ | |
1296 | default_signals(SIGNALS_CRASH_HANDLER, | |
1297 | SIGNALS_IGNORE, -1); | |
1298 | ||
1299 | if (context->ignore_sigpipe) | |
1300 | ignore_signals(SIGPIPE, -1); | |
1301 | ||
ff0af2a1 LP |
1302 | r = reset_signal_mask(); |
1303 | if (r < 0) { | |
1304 | *exit_status = EXIT_SIGNAL_MASK; | |
1305 | return r; | |
d35fbf6b | 1306 | } |
034c6ed7 | 1307 | |
d35fbf6b DM |
1308 | if (params->idle_pipe) |
1309 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 1310 | |
d35fbf6b DM |
1311 | /* Close sockets very early to make sure we don't |
1312 | * block init reexecution because it cannot bind its | |
1313 | * sockets */ | |
ff0af2a1 | 1314 | |
d35fbf6b | 1315 | log_forget_fds(); |
4f2d528d | 1316 | |
d35fbf6b DM |
1317 | if (socket_fd >= 0) |
1318 | dont_close[n_dont_close++] = socket_fd; | |
1319 | if (n_fds > 0) { | |
1320 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
1321 | n_dont_close += n_fds; | |
1322 | } | |
e44da745 DM |
1323 | if (params->bus_endpoint_fd >= 0) |
1324 | dont_close[n_dont_close++] = params->bus_endpoint_fd; | |
d35fbf6b DM |
1325 | if (runtime) { |
1326 | if (runtime->netns_storage_socket[0] >= 0) | |
1327 | dont_close[n_dont_close++] = runtime->netns_storage_socket[0]; | |
1328 | if (runtime->netns_storage_socket[1] >= 0) | |
1329 | dont_close[n_dont_close++] = runtime->netns_storage_socket[1]; | |
9fa95f85 | 1330 | } |
4f2d528d | 1331 | |
ff0af2a1 LP |
1332 | r = close_all_fds(dont_close, n_dont_close); |
1333 | if (r < 0) { | |
1334 | *exit_status = EXIT_FDS; | |
1335 | return r; | |
8c7be95e LP |
1336 | } |
1337 | ||
d35fbf6b DM |
1338 | if (!context->same_pgrp) |
1339 | if (setsid() < 0) { | |
ff0af2a1 | 1340 | *exit_status = EXIT_SETSID; |
d35fbf6b DM |
1341 | return -errno; |
1342 | } | |
9e2f7c11 | 1343 | |
d35fbf6b DM |
1344 | exec_context_tty_reset(context); |
1345 | ||
1346 | if (params->confirm_spawn) { | |
1347 | char response; | |
1348 | ||
ff0af2a1 LP |
1349 | r = ask_for_confirmation(&response, argv); |
1350 | if (r == -ETIMEDOUT) | |
d35fbf6b | 1351 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); |
ff0af2a1 LP |
1352 | else if (r < 0) |
1353 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-r)); | |
d35fbf6b DM |
1354 | else if (response == 's') { |
1355 | write_confirm_message("Skipping execution.\n"); | |
ff0af2a1 | 1356 | *exit_status = EXIT_CONFIRM; |
d35fbf6b DM |
1357 | return -ECANCELED; |
1358 | } else if (response == 'n') { | |
1359 | write_confirm_message("Failing execution.\n"); | |
ff0af2a1 | 1360 | *exit_status = 0; |
d35fbf6b DM |
1361 | return 0; |
1362 | } | |
1363 | } | |
1a63a750 | 1364 | |
524daa8c ZJS |
1365 | if (context->user) { |
1366 | username = context->user; | |
ff0af2a1 LP |
1367 | r = get_user_creds(&username, &uid, &gid, &home, &shell); |
1368 | if (r < 0) { | |
1369 | *exit_status = EXIT_USER; | |
1370 | return r; | |
524daa8c ZJS |
1371 | } |
1372 | } | |
1373 | ||
d35fbf6b DM |
1374 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1375 | * must sure to drop O_NONBLOCK */ | |
1376 | if (socket_fd >= 0) | |
1377 | fd_nonblock(socket_fd, false); | |
acbb0225 | 1378 | |
ff0af2a1 LP |
1379 | r = setup_input(context, socket_fd, params->apply_tty_stdin); |
1380 | if (r < 0) { | |
1381 | *exit_status = EXIT_STDIN; | |
1382 | return r; | |
d35fbf6b | 1383 | } |
034c6ed7 | 1384 | |
ff0af2a1 LP |
1385 | r = setup_output(context, STDOUT_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin, uid, gid); |
1386 | if (r < 0) { | |
1387 | *exit_status = EXIT_STDOUT; | |
1388 | return r; | |
d35fbf6b DM |
1389 | } |
1390 | ||
ff0af2a1 LP |
1391 | r = setup_output(context, STDERR_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin, uid, gid); |
1392 | if (r < 0) { | |
1393 | *exit_status = EXIT_STDERR; | |
1394 | return r; | |
d35fbf6b DM |
1395 | } |
1396 | ||
1397 | if (params->cgroup_path) { | |
ff0af2a1 LP |
1398 | r = cg_attach_everywhere(params->cgroup_supported, params->cgroup_path, 0, NULL, NULL); |
1399 | if (r < 0) { | |
1400 | *exit_status = EXIT_CGROUP; | |
1401 | return r; | |
309bff19 | 1402 | } |
d35fbf6b | 1403 | } |
309bff19 | 1404 | |
d35fbf6b | 1405 | if (context->oom_score_adjust_set) { |
d5243d62 | 1406 | char t[DECIMAL_STR_MAX(context->oom_score_adjust)]; |
f2b68789 | 1407 | |
d5243d62 LP |
1408 | /* When we can't make this change due to EPERM, then |
1409 | * let's silently skip over it. User namespaces | |
1410 | * prohibit write access to this file, and we | |
1411 | * shouldn't trip up over that. */ | |
613b411c | 1412 | |
d5243d62 | 1413 | sprintf(t, "%i", context->oom_score_adjust); |
ff0af2a1 | 1414 | r = write_string_file("/proc/self/oom_score_adj", t); |
6cb7fa17 | 1415 | if (r == -EPERM || r == -EACCES) { |
ff0af2a1 LP |
1416 | log_open(); |
1417 | log_unit_debug_errno(params->unit_id, r, "Failed to adjust OOM setting, assuming containerized execution, ignoring: %m"); | |
1418 | log_close(); | |
1419 | } else if (r < 0) { | |
1420 | *exit_status = EXIT_OOM_ADJUST; | |
d35fbf6b | 1421 | return -errno; |
613b411c | 1422 | } |
d35fbf6b DM |
1423 | } |
1424 | ||
1425 | if (context->nice_set) | |
1426 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
ff0af2a1 | 1427 | *exit_status = EXIT_NICE; |
d35fbf6b | 1428 | return -errno; |
613b411c LP |
1429 | } |
1430 | ||
d35fbf6b DM |
1431 | if (context->cpu_sched_set) { |
1432 | struct sched_param param = { | |
1433 | .sched_priority = context->cpu_sched_priority, | |
1434 | }; | |
1435 | ||
ff0af2a1 LP |
1436 | r = sched_setscheduler(0, |
1437 | context->cpu_sched_policy | | |
1438 | (context->cpu_sched_reset_on_fork ? | |
1439 | SCHED_RESET_ON_FORK : 0), | |
1440 | ¶m); | |
1441 | if (r < 0) { | |
1442 | *exit_status = EXIT_SETSCHEDULER; | |
d35fbf6b | 1443 | return -errno; |
fc9b2a84 | 1444 | } |
d35fbf6b | 1445 | } |
fc9b2a84 | 1446 | |
d35fbf6b DM |
1447 | if (context->cpuset) |
1448 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
ff0af2a1 | 1449 | *exit_status = EXIT_CPUAFFINITY; |
d35fbf6b | 1450 | return -errno; |
034c6ed7 LP |
1451 | } |
1452 | ||
d35fbf6b DM |
1453 | if (context->ioprio_set) |
1454 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
ff0af2a1 | 1455 | *exit_status = EXIT_IOPRIO; |
d35fbf6b DM |
1456 | return -errno; |
1457 | } | |
da726a4d | 1458 | |
d35fbf6b DM |
1459 | if (context->timer_slack_nsec != NSEC_INFINITY) |
1460 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
ff0af2a1 | 1461 | *exit_status = EXIT_TIMERSLACK; |
d35fbf6b | 1462 | return -errno; |
4c2630eb | 1463 | } |
9eba9da4 | 1464 | |
d35fbf6b DM |
1465 | if (context->personality != 0xffffffffUL) |
1466 | if (personality(context->personality) < 0) { | |
ff0af2a1 | 1467 | *exit_status = EXIT_PERSONALITY; |
d35fbf6b | 1468 | return -errno; |
4c2630eb | 1469 | } |
94f04347 | 1470 | |
d35fbf6b DM |
1471 | if (context->utmp_id) |
1472 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path); | |
1473 | ||
524daa8c | 1474 | if (context->user && is_terminal_input(context->std_input)) { |
ff0af2a1 LP |
1475 | r = chown_terminal(STDIN_FILENO, uid); |
1476 | if (r < 0) { | |
1477 | *exit_status = EXIT_STDIN; | |
1478 | return r; | |
071830ff | 1479 | } |
d35fbf6b | 1480 | } |
8e274523 | 1481 | |
e44da745 DM |
1482 | #ifdef ENABLE_KDBUS |
1483 | if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) { | |
fed1e721 | 1484 | uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid; |
e44da745 | 1485 | |
ff0af2a1 LP |
1486 | r = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint); |
1487 | if (r < 0) { | |
1488 | *exit_status = EXIT_BUS_ENDPOINT; | |
1489 | return r; | |
e44da745 DM |
1490 | } |
1491 | } | |
1492 | #endif | |
1493 | ||
a931ad47 LP |
1494 | /* If delegation is enabled we'll pass ownership of the cgroup |
1495 | * (but only in systemd's own controller hierarchy!) to the | |
1496 | * user of the new process. */ | |
1497 | if (params->cgroup_path && context->user && params->cgroup_delegate) { | |
ff0af2a1 LP |
1498 | r = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid); |
1499 | if (r < 0) { | |
1500 | *exit_status = EXIT_CGROUP; | |
1501 | return r; | |
d35fbf6b | 1502 | } |
034c6ed7 | 1503 | |
034c6ed7 | 1504 | |
ff0af2a1 LP |
1505 | r = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0755, uid, gid); |
1506 | if (r < 0) { | |
1507 | *exit_status = EXIT_CGROUP; | |
1508 | return r; | |
034c6ed7 | 1509 | } |
d35fbf6b | 1510 | } |
034c6ed7 | 1511 | |
d35fbf6b DM |
1512 | if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) { |
1513 | char **rt; | |
fb33a393 | 1514 | |
d35fbf6b DM |
1515 | STRV_FOREACH(rt, context->runtime_directory) { |
1516 | _cleanup_free_ char *p; | |
94f04347 | 1517 | |
d35fbf6b DM |
1518 | p = strjoin(params->runtime_prefix, "/", *rt, NULL); |
1519 | if (!p) { | |
ff0af2a1 | 1520 | *exit_status = EXIT_RUNTIME_DIRECTORY; |
d35fbf6b | 1521 | return -ENOMEM; |
94f04347 | 1522 | } |
94f04347 | 1523 | |
ca905b2f | 1524 | r = mkdir_safe_label(p, context->runtime_directory_mode, uid, gid); |
ff0af2a1 LP |
1525 | if (r < 0) { |
1526 | *exit_status = EXIT_RUNTIME_DIRECTORY; | |
1527 | return r; | |
94f04347 | 1528 | } |
d35fbf6b DM |
1529 | } |
1530 | } | |
94f04347 | 1531 | |
d35fbf6b | 1532 | if (params->apply_permissions) { |
ff0af2a1 LP |
1533 | r = enforce_groups(context, username, gid); |
1534 | if (r < 0) { | |
1535 | *exit_status = EXIT_GROUP; | |
1536 | return r; | |
d35fbf6b DM |
1537 | } |
1538 | } | |
9eba9da4 | 1539 | |
d35fbf6b | 1540 | umask(context->umask); |
94f04347 | 1541 | |
d35fbf6b DM |
1542 | #ifdef HAVE_PAM |
1543 | if (params->apply_permissions && context->pam_name && username) { | |
ff0af2a1 LP |
1544 | r = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds); |
1545 | if (r < 0) { | |
1546 | *exit_status = EXIT_PAM; | |
1547 | return r; | |
d35fbf6b DM |
1548 | } |
1549 | } | |
1550 | #endif | |
ac45f971 | 1551 | |
d35fbf6b | 1552 | if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) { |
ff0af2a1 LP |
1553 | r = setup_netns(runtime->netns_storage_socket); |
1554 | if (r < 0) { | |
1555 | *exit_status = EXIT_NETWORK; | |
1556 | return r; | |
d35fbf6b DM |
1557 | } |
1558 | } | |
169c1bda | 1559 | |
d35fbf6b DM |
1560 | if (!strv_isempty(context->read_write_dirs) || |
1561 | !strv_isempty(context->read_only_dirs) || | |
1562 | !strv_isempty(context->inaccessible_dirs) || | |
1563 | context->mount_flags != 0 || | |
1564 | (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) || | |
e44da745 | 1565 | params->bus_endpoint_path || |
d35fbf6b DM |
1566 | context->private_devices || |
1567 | context->protect_system != PROTECT_SYSTEM_NO || | |
1568 | context->protect_home != PROTECT_HOME_NO) { | |
1569 | ||
1570 | char *tmp = NULL, *var = NULL; | |
1571 | ||
1572 | /* The runtime struct only contains the parent | |
1573 | * of the private /tmp, which is | |
1574 | * non-accessible to world users. Inside of it | |
1575 | * there's a /tmp that is sticky, and that's | |
1576 | * the one we want to use here. */ | |
1577 | ||
1578 | if (context->private_tmp && runtime) { | |
1579 | if (runtime->tmp_dir) | |
63c372cb | 1580 | tmp = strjoina(runtime->tmp_dir, "/tmp"); |
d35fbf6b | 1581 | if (runtime->var_tmp_dir) |
63c372cb | 1582 | var = strjoina(runtime->var_tmp_dir, "/tmp"); |
d35fbf6b | 1583 | } |
d8b4e2e9 | 1584 | |
ff0af2a1 | 1585 | r = setup_namespace( |
d35fbf6b DM |
1586 | context->read_write_dirs, |
1587 | context->read_only_dirs, | |
1588 | context->inaccessible_dirs, | |
1589 | tmp, | |
1590 | var, | |
e44da745 | 1591 | params->bus_endpoint_path, |
d35fbf6b DM |
1592 | context->private_devices, |
1593 | context->protect_home, | |
1594 | context->protect_system, | |
1595 | context->mount_flags); | |
0015ebf3 | 1596 | |
ff0af2a1 LP |
1597 | /* If we couldn't set up the namespace this is |
1598 | * probably due to a missing capability. In this case, | |
1599 | * silently proceeed. */ | |
1600 | if (r == -EPERM || r == -EACCES) { | |
1601 | log_open(); | |
1602 | log_unit_debug_errno(params->unit_id, r, "Failed to set up namespace, assuming containerized execution, ignoring: %m"); | |
1603 | log_close(); | |
1604 | } else if (r < 0) { | |
1605 | *exit_status = EXIT_NAMESPACE; | |
1606 | return r; | |
81a2b7ce | 1607 | } |
d35fbf6b | 1608 | } |
81a2b7ce | 1609 | |
d35fbf6b DM |
1610 | if (params->apply_chroot) { |
1611 | if (context->root_directory) | |
1612 | if (chroot(context->root_directory) < 0) { | |
ff0af2a1 | 1613 | *exit_status = EXIT_CHROOT; |
d35fbf6b | 1614 | return -errno; |
8aa75193 LP |
1615 | } |
1616 | ||
4c08c824 LP |
1617 | if (chdir(context->working_directory ?: "/") < 0 && |
1618 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1619 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1620 | return -errno; |
1621 | } | |
1622 | } else { | |
1623 | _cleanup_free_ char *d = NULL; | |
8aa75193 | 1624 | |
d35fbf6b | 1625 | if (asprintf(&d, "%s/%s", |
cf1d0302 LP |
1626 | context->root_directory ?: "", |
1627 | context->working_directory ?: "") < 0) { | |
ff0af2a1 | 1628 | *exit_status = EXIT_MEMORY; |
d35fbf6b | 1629 | return -ENOMEM; |
8aa75193 | 1630 | } |
8aa75193 | 1631 | |
cf1d0302 LP |
1632 | if (chdir(d) < 0 && |
1633 | !context->working_directory_missing_ok) { | |
ff0af2a1 | 1634 | *exit_status = EXIT_CHDIR; |
d35fbf6b DM |
1635 | return -errno; |
1636 | } | |
1637 | } | |
e66cf1a3 | 1638 | |
9008e1ac MS |
1639 | #ifdef HAVE_SELINUX |
1640 | if (params->apply_permissions && mac_selinux_use() && params->selinux_context_net && socket_fd >= 0) { | |
ff0af2a1 LP |
1641 | r = mac_selinux_get_child_mls_label(socket_fd, command->path, context->selinux_context, &mac_selinux_context_net); |
1642 | if (r < 0) { | |
1643 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1644 | return r; | |
9008e1ac MS |
1645 | } |
1646 | } | |
1647 | #endif | |
1648 | ||
d35fbf6b DM |
1649 | /* We repeat the fd closing here, to make sure that |
1650 | * nothing is leaked from the PAM modules. Note that | |
1651 | * we are more aggressive this time since socket_fd | |
e44da745 DM |
1652 | * and the netns fds we don't need anymore. The custom |
1653 | * endpoint fd was needed to upload the policy and can | |
1654 | * now be closed as well. */ | |
ff0af2a1 LP |
1655 | r = close_all_fds(fds, n_fds); |
1656 | if (r >= 0) | |
1657 | r = shift_fds(fds, n_fds); | |
1658 | if (r >= 0) | |
1659 | r = flags_fds(fds, n_fds, context->non_blocking); | |
1660 | if (r < 0) { | |
1661 | *exit_status = EXIT_FDS; | |
1662 | return r; | |
d35fbf6b | 1663 | } |
e66cf1a3 | 1664 | |
d35fbf6b | 1665 | if (params->apply_permissions) { |
e66cf1a3 | 1666 | |
d35fbf6b DM |
1667 | for (i = 0; i < _RLIMIT_MAX; i++) { |
1668 | if (!context->rlimit[i]) | |
1669 | continue; | |
1670 | ||
1671 | if (setrlimit_closest(i, context->rlimit[i]) < 0) { | |
ff0af2a1 | 1672 | *exit_status = EXIT_LIMITS; |
d35fbf6b | 1673 | return -errno; |
e66cf1a3 LP |
1674 | } |
1675 | } | |
1676 | ||
d35fbf6b | 1677 | if (context->capability_bounding_set_drop) { |
ff0af2a1 LP |
1678 | r = capability_bounding_set_drop(context->capability_bounding_set_drop, false); |
1679 | if (r < 0) { | |
1680 | *exit_status = EXIT_CAPABILITIES; | |
1681 | return r; | |
3b8bddde | 1682 | } |
4c2630eb | 1683 | } |
3b8bddde | 1684 | |
2ca620c4 WC |
1685 | #ifdef HAVE_SMACK |
1686 | if (context->smack_process_label) { | |
ff0af2a1 LP |
1687 | r = mac_smack_apply_pid(0, context->smack_process_label); |
1688 | if (r < 0) { | |
1689 | *exit_status = EXIT_SMACK_PROCESS_LABEL; | |
1690 | return r; | |
2ca620c4 WC |
1691 | } |
1692 | } | |
1693 | #endif | |
1694 | ||
d35fbf6b | 1695 | if (context->user) { |
ff0af2a1 LP |
1696 | r = enforce_user(context, uid); |
1697 | if (r < 0) { | |
1698 | *exit_status = EXIT_USER; | |
1699 | return r; | |
5b6319dc LP |
1700 | } |
1701 | } | |
d35fbf6b DM |
1702 | |
1703 | /* PR_GET_SECUREBITS is not privileged, while | |
1704 | * PR_SET_SECUREBITS is. So to suppress | |
1705 | * potential EPERMs we'll try not to call | |
1706 | * PR_SET_SECUREBITS unless necessary. */ | |
1707 | if (prctl(PR_GET_SECUREBITS) != context->secure_bits) | |
1708 | if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) { | |
ff0af2a1 | 1709 | *exit_status = EXIT_SECUREBITS; |
d35fbf6b | 1710 | return -errno; |
ff01d048 | 1711 | } |
5b6319dc | 1712 | |
d35fbf6b DM |
1713 | if (context->capabilities) |
1714 | if (cap_set_proc(context->capabilities) < 0) { | |
ff0af2a1 | 1715 | *exit_status = EXIT_CAPABILITIES; |
d35fbf6b | 1716 | return -errno; |
613b411c LP |
1717 | } |
1718 | ||
d35fbf6b DM |
1719 | if (context->no_new_privileges) |
1720 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { | |
ff0af2a1 | 1721 | *exit_status = EXIT_NO_NEW_PRIVILEGES; |
d35fbf6b DM |
1722 | return -errno; |
1723 | } | |
1724 | ||
1725 | #ifdef HAVE_SECCOMP | |
1726 | if (context->address_families_whitelist || | |
1727 | !set_isempty(context->address_families)) { | |
ff0af2a1 LP |
1728 | r = apply_address_families(context); |
1729 | if (r < 0) { | |
1730 | *exit_status = EXIT_ADDRESS_FAMILIES; | |
1731 | return r; | |
4c2630eb MS |
1732 | } |
1733 | } | |
04aa0cb9 | 1734 | |
d35fbf6b DM |
1735 | if (context->syscall_whitelist || |
1736 | !set_isempty(context->syscall_filter) || | |
1737 | !set_isempty(context->syscall_archs)) { | |
ff0af2a1 LP |
1738 | r = apply_seccomp(context); |
1739 | if (r < 0) { | |
1740 | *exit_status = EXIT_SECCOMP; | |
1741 | return r; | |
81a2b7ce | 1742 | } |
d35fbf6b DM |
1743 | } |
1744 | #endif | |
81a2b7ce | 1745 | |
d35fbf6b | 1746 | #ifdef HAVE_SELINUX |
6baa7db0 | 1747 | if (mac_selinux_use()) { |
9008e1ac | 1748 | char *exec_context = mac_selinux_context_net ?: context->selinux_context; |
16115b0a | 1749 | |
9008e1ac | 1750 | if (exec_context) { |
ff0af2a1 LP |
1751 | r = setexeccon(exec_context); |
1752 | if (r < 0) { | |
1753 | *exit_status = EXIT_SELINUX_CONTEXT; | |
1754 | return r; | |
16115b0a | 1755 | } |
81a2b7ce | 1756 | } |
81a2b7ce | 1757 | } |
d35fbf6b | 1758 | #endif |
81a2b7ce | 1759 | |
d35fbf6b | 1760 | #ifdef HAVE_APPARMOR |
6baa7db0 | 1761 | if (context->apparmor_profile && mac_apparmor_use()) { |
ff0af2a1 LP |
1762 | r = aa_change_onexec(context->apparmor_profile); |
1763 | if (r < 0 && !context->apparmor_profile_ignore) { | |
1764 | *exit_status = EXIT_APPARMOR_PROFILE; | |
5482192e | 1765 | return -errno; |
d35fbf6b | 1766 | } |
034c6ed7 | 1767 | } |
d35fbf6b DM |
1768 | #endif |
1769 | } | |
034c6ed7 | 1770 | |
ff0af2a1 LP |
1771 | r = build_environment(context, n_fds, params->watchdog_usec, home, username, shell, &our_env); |
1772 | if (r < 0) { | |
1773 | *exit_status = EXIT_MEMORY; | |
1774 | return r; | |
d35fbf6b | 1775 | } |
034c6ed7 | 1776 | |
d35fbf6b DM |
1777 | final_env = strv_env_merge(5, |
1778 | params->environment, | |
1779 | our_env, | |
1780 | context->environment, | |
1781 | files_env, | |
1782 | pam_env, | |
1783 | NULL); | |
1784 | if (!final_env) { | |
ff0af2a1 | 1785 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
1786 | return -ENOMEM; |
1787 | } | |
81a2b7ce | 1788 | |
d35fbf6b DM |
1789 | final_argv = replace_env_argv(argv, final_env); |
1790 | if (!final_argv) { | |
ff0af2a1 | 1791 | *exit_status = EXIT_MEMORY; |
d35fbf6b DM |
1792 | return -ENOMEM; |
1793 | } | |
034c6ed7 | 1794 | |
d35fbf6b | 1795 | final_env = strv_env_clean(final_env); |
260abb78 | 1796 | |
553d2243 | 1797 | if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { |
d35fbf6b | 1798 | _cleanup_free_ char *line; |
81a2b7ce | 1799 | |
d35fbf6b DM |
1800 | line = exec_command_line(final_argv); |
1801 | if (line) { | |
1802 | log_open(); | |
e2cc6eca LP |
1803 | log_unit_struct(params->unit_id, |
1804 | LOG_DEBUG, | |
d35fbf6b | 1805 | "EXECUTABLE=%s", command->path, |
e2cc6eca | 1806 | LOG_MESSAGE("Executing: %s", line), |
d35fbf6b DM |
1807 | NULL); |
1808 | log_close(); | |
1809 | } | |
1810 | } | |
1811 | execve(command->path, final_argv, final_env); | |
ff0af2a1 | 1812 | *exit_status = EXIT_EXEC; |
d35fbf6b DM |
1813 | return -errno; |
1814 | } | |
81a2b7ce | 1815 | |
d35fbf6b DM |
1816 | int exec_spawn(ExecCommand *command, |
1817 | const ExecContext *context, | |
1818 | const ExecParameters *params, | |
1819 | ExecRuntime *runtime, | |
1820 | pid_t *ret) { | |
8351ceae | 1821 | |
d35fbf6b DM |
1822 | _cleanup_strv_free_ char **files_env = NULL; |
1823 | int *fds = NULL; unsigned n_fds = 0; | |
ff0af2a1 LP |
1824 | _cleanup_free_ char *line = NULL; |
1825 | int socket_fd, r; | |
1826 | char **argv; | |
d35fbf6b | 1827 | pid_t pid; |
8351ceae | 1828 | |
d35fbf6b DM |
1829 | assert(command); |
1830 | assert(context); | |
1831 | assert(ret); | |
1832 | assert(params); | |
1833 | assert(params->fds || params->n_fds <= 0); | |
4298d0b5 | 1834 | |
d35fbf6b DM |
1835 | if (context->std_input == EXEC_INPUT_SOCKET || |
1836 | context->std_output == EXEC_OUTPUT_SOCKET || | |
1837 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 1838 | |
ff0af2a1 LP |
1839 | if (params->n_fds != 1) { |
1840 | log_unit_error(params->unit_id, "Got more than one socket."); | |
d35fbf6b | 1841 | return -EINVAL; |
ff0af2a1 | 1842 | } |
eef65bf3 | 1843 | |
d35fbf6b DM |
1844 | socket_fd = params->fds[0]; |
1845 | } else { | |
1846 | socket_fd = -1; | |
1847 | fds = params->fds; | |
1848 | n_fds = params->n_fds; | |
1849 | } | |
94f04347 | 1850 | |
ff0af2a1 LP |
1851 | r = exec_context_load_environment(context, params->unit_id, &files_env); |
1852 | if (r < 0) | |
1853 | return log_unit_error_errno(params->unit_id, r, "Failed to load environment files: %m"); | |
034c6ed7 | 1854 | |
d35fbf6b | 1855 | argv = params->argv ?: command->argv; |
d35fbf6b DM |
1856 | line = exec_command_line(argv); |
1857 | if (!line) | |
1858 | return log_oom(); | |
fab56fc5 | 1859 | |
e2cc6eca LP |
1860 | log_unit_struct(params->unit_id, |
1861 | LOG_DEBUG, | |
d35fbf6b | 1862 | "EXECUTABLE=%s", command->path, |
e2cc6eca | 1863 | LOG_MESSAGE("About to execute: %s", line), |
d35fbf6b | 1864 | NULL); |
d35fbf6b DM |
1865 | pid = fork(); |
1866 | if (pid < 0) | |
ff0af2a1 | 1867 | return log_unit_error_errno(params->unit_id, r, "Failed to fork: %m"); |
d35fbf6b DM |
1868 | |
1869 | if (pid == 0) { | |
ff0af2a1 LP |
1870 | int exit_status; |
1871 | ||
1872 | r = exec_child(command, | |
1873 | context, | |
1874 | params, | |
1875 | runtime, | |
1876 | argv, | |
1877 | socket_fd, | |
1878 | fds, n_fds, | |
1879 | files_env, | |
1880 | &exit_status); | |
1881 | if (r < 0) { | |
4c2630eb | 1882 | log_open(); |
ff0af2a1 LP |
1883 | log_unit_struct(params->unit_id, |
1884 | LOG_ERR, | |
1885 | LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), | |
1886 | "EXECUTABLE=%s", command->path, | |
1887 | LOG_MESSAGE("Failed at step %s spawning %s: %s", | |
1888 | exit_status_to_string(exit_status, EXIT_STATUS_SYSTEMD), | |
1889 | command->path, strerror(-r)), | |
1890 | LOG_ERRNO(r), | |
1891 | NULL); | |
4c2630eb MS |
1892 | } |
1893 | ||
ff0af2a1 | 1894 | _exit(exit_status); |
034c6ed7 LP |
1895 | } |
1896 | ||
ff0af2a1 | 1897 | log_unit_debug(params->unit_id, "Forked %s as "PID_FMT, command->path, pid); |
23635a85 | 1898 | |
80876c20 LP |
1899 | /* We add the new process to the cgroup both in the child (so |
1900 | * that we can be sure that no user code is ever executed | |
1901 | * outside of the cgroup) and in the parent (so that we can be | |
1902 | * sure that when we kill the cgroup the process will be | |
1903 | * killed too). */ | |
d35fbf6b DM |
1904 | if (params->cgroup_path) |
1905 | cg_attach(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, pid); | |
2da3263a | 1906 | |
b58b4116 | 1907 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 1908 | |
034c6ed7 | 1909 | *ret = pid; |
5cb5a6ff LP |
1910 | return 0; |
1911 | } | |
1912 | ||
034c6ed7 LP |
1913 | void exec_context_init(ExecContext *c) { |
1914 | assert(c); | |
1915 | ||
4c12626c | 1916 | c->umask = 0022; |
9eba9da4 | 1917 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 1918 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 1919 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 1920 | c->syslog_level_prefix = true; |
353e12c2 | 1921 | c->ignore_sigpipe = true; |
3a43da28 | 1922 | c->timer_slack_nsec = NSEC_INFINITY; |
ac45f971 | 1923 | c->personality = 0xffffffffUL; |
e66cf1a3 | 1924 | c->runtime_directory_mode = 0755; |
034c6ed7 LP |
1925 | } |
1926 | ||
613b411c | 1927 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
1928 | unsigned l; |
1929 | ||
1930 | assert(c); | |
1931 | ||
1932 | strv_free(c->environment); | |
034c6ed7 | 1933 | c->environment = NULL; |
5cb5a6ff | 1934 | |
8c7be95e LP |
1935 | strv_free(c->environment_files); |
1936 | c->environment_files = NULL; | |
1937 | ||
034c6ed7 | 1938 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) { |
5cb5a6ff | 1939 | free(c->rlimit[l]); |
034c6ed7 LP |
1940 | c->rlimit[l] = NULL; |
1941 | } | |
1942 | ||
9eba9da4 LP |
1943 | free(c->working_directory); |
1944 | c->working_directory = NULL; | |
1945 | free(c->root_directory); | |
1946 | c->root_directory = NULL; | |
5cb5a6ff | 1947 | |
80876c20 LP |
1948 | free(c->tty_path); |
1949 | c->tty_path = NULL; | |
1950 | ||
071830ff LP |
1951 | free(c->syslog_identifier); |
1952 | c->syslog_identifier = NULL; | |
1953 | ||
5cb5a6ff | 1954 | free(c->user); |
034c6ed7 LP |
1955 | c->user = NULL; |
1956 | ||
5cb5a6ff | 1957 | free(c->group); |
034c6ed7 LP |
1958 | c->group = NULL; |
1959 | ||
1960 | strv_free(c->supplementary_groups); | |
1961 | c->supplementary_groups = NULL; | |
94f04347 | 1962 | |
5b6319dc LP |
1963 | free(c->pam_name); |
1964 | c->pam_name = NULL; | |
1965 | ||
94f04347 LP |
1966 | if (c->capabilities) { |
1967 | cap_free(c->capabilities); | |
1968 | c->capabilities = NULL; | |
1969 | } | |
15ae422b LP |
1970 | |
1971 | strv_free(c->read_only_dirs); | |
1972 | c->read_only_dirs = NULL; | |
1973 | ||
1974 | strv_free(c->read_write_dirs); | |
1975 | c->read_write_dirs = NULL; | |
1976 | ||
1977 | strv_free(c->inaccessible_dirs); | |
1978 | c->inaccessible_dirs = NULL; | |
82c121a4 LP |
1979 | |
1980 | if (c->cpuset) | |
1981 | CPU_FREE(c->cpuset); | |
86a3475b LP |
1982 | |
1983 | free(c->utmp_id); | |
1984 | c->utmp_id = NULL; | |
b9a0e010 | 1985 | |
7b52a628 MS |
1986 | free(c->selinux_context); |
1987 | c->selinux_context = NULL; | |
1988 | ||
eef65bf3 MS |
1989 | free(c->apparmor_profile); |
1990 | c->apparmor_profile = NULL; | |
1991 | ||
17df7223 LP |
1992 | set_free(c->syscall_filter); |
1993 | c->syscall_filter = NULL; | |
57183d11 LP |
1994 | |
1995 | set_free(c->syscall_archs); | |
1996 | c->syscall_archs = NULL; | |
4298d0b5 LP |
1997 | |
1998 | set_free(c->address_families); | |
1999 | c->address_families = NULL; | |
e66cf1a3 LP |
2000 | |
2001 | strv_free(c->runtime_directory); | |
2002 | c->runtime_directory = NULL; | |
bb7dd0b0 DM |
2003 | |
2004 | bus_endpoint_free(c->bus_endpoint); | |
2005 | c->bus_endpoint = NULL; | |
e66cf1a3 LP |
2006 | } |
2007 | ||
2008 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) { | |
2009 | char **i; | |
2010 | ||
2011 | assert(c); | |
2012 | ||
2013 | if (!runtime_prefix) | |
2014 | return 0; | |
2015 | ||
2016 | STRV_FOREACH(i, c->runtime_directory) { | |
2017 | _cleanup_free_ char *p; | |
2018 | ||
2019 | p = strjoin(runtime_prefix, "/", *i, NULL); | |
2020 | if (!p) | |
2021 | return -ENOMEM; | |
2022 | ||
2023 | /* We execute this synchronously, since we need to be | |
2024 | * sure this is gone when we start the service | |
2025 | * next. */ | |
c6878637 | 2026 | (void) rm_rf(p, REMOVE_ROOT); |
e66cf1a3 LP |
2027 | } |
2028 | ||
2029 | return 0; | |
5cb5a6ff LP |
2030 | } |
2031 | ||
43d0fcbd LP |
2032 | void exec_command_done(ExecCommand *c) { |
2033 | assert(c); | |
2034 | ||
2035 | free(c->path); | |
2036 | c->path = NULL; | |
2037 | ||
2038 | strv_free(c->argv); | |
2039 | c->argv = NULL; | |
2040 | } | |
2041 | ||
2042 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
2043 | unsigned i; | |
2044 | ||
2045 | for (i = 0; i < n; i++) | |
2046 | exec_command_done(c+i); | |
2047 | } | |
2048 | ||
f1acf85a | 2049 | ExecCommand* exec_command_free_list(ExecCommand *c) { |
5cb5a6ff LP |
2050 | ExecCommand *i; |
2051 | ||
2052 | while ((i = c)) { | |
71fda00f | 2053 | LIST_REMOVE(command, c, i); |
43d0fcbd | 2054 | exec_command_done(i); |
5cb5a6ff LP |
2055 | free(i); |
2056 | } | |
f1acf85a ZJS |
2057 | |
2058 | return NULL; | |
5cb5a6ff LP |
2059 | } |
2060 | ||
034c6ed7 LP |
2061 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
2062 | unsigned i; | |
2063 | ||
f1acf85a ZJS |
2064 | for (i = 0; i < n; i++) |
2065 | c[i] = exec_command_free_list(c[i]); | |
034c6ed7 LP |
2066 | } |
2067 | ||
039f0e70 LP |
2068 | typedef struct InvalidEnvInfo { |
2069 | const char *unit_id; | |
2070 | const char *path; | |
2071 | } InvalidEnvInfo; | |
2072 | ||
2073 | static void invalid_env(const char *p, void *userdata) { | |
2074 | InvalidEnvInfo *info = userdata; | |
2075 | ||
2076 | log_unit_error(info->unit_id, "Ignoring invalid environment assignment '%s': %s", p, info->path); | |
2077 | } | |
2078 | ||
7491ccf2 | 2079 | int exec_context_load_environment(const ExecContext *c, const char *unit_id, char ***l) { |
8c7be95e LP |
2080 | char **i, **r = NULL; |
2081 | ||
2082 | assert(c); | |
2083 | assert(l); | |
2084 | ||
2085 | STRV_FOREACH(i, c->environment_files) { | |
2086 | char *fn; | |
2087 | int k; | |
2088 | bool ignore = false; | |
2089 | char **p; | |
7fd1b19b | 2090 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 2091 | int count, n; |
8c7be95e LP |
2092 | |
2093 | fn = *i; | |
2094 | ||
2095 | if (fn[0] == '-') { | |
2096 | ignore = true; | |
2097 | fn ++; | |
2098 | } | |
2099 | ||
2100 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
2101 | if (ignore) |
2102 | continue; | |
2103 | ||
2104 | strv_free(r); | |
2105 | return -EINVAL; | |
2106 | } | |
2107 | ||
2bef10ab | 2108 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
2109 | errno = 0; |
2110 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
2111 | if (ignore) |
2112 | continue; | |
8c7be95e | 2113 | |
2bef10ab PL |
2114 | strv_free(r); |
2115 | return errno ? -errno : -EINVAL; | |
2116 | } | |
2117 | count = pglob.gl_pathc; | |
2118 | if (count == 0) { | |
8c7be95e LP |
2119 | if (ignore) |
2120 | continue; | |
2121 | ||
2122 | strv_free(r); | |
2bef10ab | 2123 | return -EINVAL; |
8c7be95e | 2124 | } |
2bef10ab | 2125 | for (n = 0; n < count; n++) { |
717603e3 | 2126 | k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
2127 | if (k < 0) { |
2128 | if (ignore) | |
2129 | continue; | |
8c7be95e | 2130 | |
2bef10ab | 2131 | strv_free(r); |
2bef10ab | 2132 | return k; |
e9c1ea9d | 2133 | } |
ebc05a09 | 2134 | /* Log invalid environment variables with filename */ |
039f0e70 LP |
2135 | if (p) { |
2136 | InvalidEnvInfo info = { | |
2137 | .unit_id = unit_id, | |
2138 | .path = pglob.gl_pathv[n] | |
2139 | }; | |
2140 | ||
2141 | p = strv_env_clean_with_callback(p, invalid_env, &info); | |
2142 | } | |
8c7be95e | 2143 | |
2bef10ab PL |
2144 | if (r == NULL) |
2145 | r = p; | |
2146 | else { | |
2147 | char **m; | |
8c7be95e | 2148 | |
2bef10ab PL |
2149 | m = strv_env_merge(2, r, p); |
2150 | strv_free(r); | |
2151 | strv_free(p); | |
c84a9488 | 2152 | if (!m) |
2bef10ab | 2153 | return -ENOMEM; |
2bef10ab PL |
2154 | |
2155 | r = m; | |
2156 | } | |
8c7be95e LP |
2157 | } |
2158 | } | |
2159 | ||
2160 | *l = r; | |
2161 | ||
2162 | return 0; | |
2163 | } | |
2164 | ||
6ac8fdc9 | 2165 | static bool tty_may_match_dev_console(const char *tty) { |
e1d75803 RC |
2166 | _cleanup_free_ char *active = NULL; |
2167 | char *console; | |
6ac8fdc9 MS |
2168 | |
2169 | if (startswith(tty, "/dev/")) | |
2170 | tty += 5; | |
2171 | ||
2172 | /* trivial identity? */ | |
2173 | if (streq(tty, "console")) | |
2174 | return true; | |
2175 | ||
2176 | console = resolve_dev_console(&active); | |
2177 | /* if we could not resolve, assume it may */ | |
2178 | if (!console) | |
2179 | return true; | |
2180 | ||
2181 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
e1d75803 | 2182 | return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
2183 | } |
2184 | ||
2185 | bool exec_context_may_touch_console(ExecContext *ec) { | |
2186 | return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate || | |
2187 | is_terminal_input(ec->std_input) || | |
2188 | is_terminal_output(ec->std_output) || | |
2189 | is_terminal_output(ec->std_error)) && | |
2190 | tty_may_match_dev_console(tty_path(ec)); | |
2191 | } | |
2192 | ||
15ae422b LP |
2193 | static void strv_fprintf(FILE *f, char **l) { |
2194 | char **g; | |
2195 | ||
2196 | assert(f); | |
2197 | ||
2198 | STRV_FOREACH(g, l) | |
2199 | fprintf(f, " %s", *g); | |
2200 | } | |
2201 | ||
5cb5a6ff | 2202 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
507f22bd | 2203 | char **e; |
94f04347 | 2204 | unsigned i; |
9eba9da4 | 2205 | |
5cb5a6ff LP |
2206 | assert(c); |
2207 | assert(f); | |
2208 | ||
4ad49000 | 2209 | prefix = strempty(prefix); |
5cb5a6ff LP |
2210 | |
2211 | fprintf(f, | |
94f04347 LP |
2212 | "%sUMask: %04o\n" |
2213 | "%sWorkingDirectory: %s\n" | |
451a074f | 2214 | "%sRootDirectory: %s\n" |
15ae422b | 2215 | "%sNonBlocking: %s\n" |
64747e2d | 2216 | "%sPrivateTmp: %s\n" |
4819ff03 | 2217 | "%sPrivateNetwork: %s\n" |
7f112f50 | 2218 | "%sPrivateDevices: %s\n" |
1b8689f9 LP |
2219 | "%sProtectHome: %s\n" |
2220 | "%sProtectSystem: %s\n" | |
3bb07b76 | 2221 | "%sIgnoreSIGPIPE: %s\n", |
5cb5a6ff | 2222 | prefix, c->umask, |
9eba9da4 | 2223 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 2224 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 2225 | prefix, yes_no(c->non_blocking), |
64747e2d | 2226 | prefix, yes_no(c->private_tmp), |
4819ff03 | 2227 | prefix, yes_no(c->private_network), |
7f112f50 | 2228 | prefix, yes_no(c->private_devices), |
1b8689f9 LP |
2229 | prefix, protect_home_to_string(c->protect_home), |
2230 | prefix, protect_system_to_string(c->protect_system), | |
3bb07b76 | 2231 | prefix, yes_no(c->ignore_sigpipe)); |
fb33a393 | 2232 | |
8c7be95e LP |
2233 | STRV_FOREACH(e, c->environment) |
2234 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
2235 | ||
2236 | STRV_FOREACH(e, c->environment_files) | |
2237 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 2238 | |
fb33a393 LP |
2239 | if (c->nice_set) |
2240 | fprintf(f, | |
2241 | "%sNice: %i\n", | |
2242 | prefix, c->nice); | |
2243 | ||
dd6c17b1 | 2244 | if (c->oom_score_adjust_set) |
fb33a393 | 2245 | fprintf(f, |
dd6c17b1 LP |
2246 | "%sOOMScoreAdjust: %i\n", |
2247 | prefix, c->oom_score_adjust); | |
9eba9da4 | 2248 | |
94f04347 LP |
2249 | for (i = 0; i < RLIM_NLIMITS; i++) |
2250 | if (c->rlimit[i]) | |
de0671ee ZJS |
2251 | fprintf(f, "%s%s: "RLIM_FMT"\n", |
2252 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); | |
94f04347 | 2253 | |
f8b69d1d | 2254 | if (c->ioprio_set) { |
1756a011 | 2255 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 2256 | |
1756a011 | 2257 | ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); |
9eba9da4 LP |
2258 | fprintf(f, |
2259 | "%sIOSchedulingClass: %s\n" | |
2260 | "%sIOPriority: %i\n", | |
f8b69d1d | 2261 | prefix, strna(class_str), |
9eba9da4 | 2262 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d | 2263 | } |
94f04347 | 2264 | |
f8b69d1d | 2265 | if (c->cpu_sched_set) { |
1756a011 | 2266 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 2267 | |
1756a011 | 2268 | sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
94f04347 LP |
2269 | fprintf(f, |
2270 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
2271 | "%sCPUSchedulingPriority: %i\n" |
2272 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 2273 | prefix, strna(policy_str), |
38b48754 LP |
2274 | prefix, c->cpu_sched_priority, |
2275 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 2276 | } |
94f04347 | 2277 | |
82c121a4 | 2278 | if (c->cpuset) { |
94f04347 | 2279 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
2280 | for (i = 0; i < c->cpuset_ncpus; i++) |
2281 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
43a99a7a | 2282 | fprintf(f, " %u", i); |
94f04347 LP |
2283 | fputs("\n", f); |
2284 | } | |
2285 | ||
3a43da28 | 2286 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 2287 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
2288 | |
2289 | fprintf(f, | |
80876c20 LP |
2290 | "%sStandardInput: %s\n" |
2291 | "%sStandardOutput: %s\n" | |
2292 | "%sStandardError: %s\n", | |
2293 | prefix, exec_input_to_string(c->std_input), | |
2294 | prefix, exec_output_to_string(c->std_output), | |
2295 | prefix, exec_output_to_string(c->std_error)); | |
2296 | ||
2297 | if (c->tty_path) | |
2298 | fprintf(f, | |
6ea832a2 LP |
2299 | "%sTTYPath: %s\n" |
2300 | "%sTTYReset: %s\n" | |
2301 | "%sTTYVHangup: %s\n" | |
2302 | "%sTTYVTDisallocate: %s\n", | |
2303 | prefix, c->tty_path, | |
2304 | prefix, yes_no(c->tty_reset), | |
2305 | prefix, yes_no(c->tty_vhangup), | |
2306 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 2307 | |
5ce70e5b ZJS |
2308 | if (c->std_output == EXEC_OUTPUT_SYSLOG || |
2309 | c->std_output == EXEC_OUTPUT_KMSG || | |
2310 | c->std_output == EXEC_OUTPUT_JOURNAL || | |
2311 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2312 | c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2313 | c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
2314 | c->std_error == EXEC_OUTPUT_SYSLOG || | |
2315 | c->std_error == EXEC_OUTPUT_KMSG || | |
2316 | c->std_error == EXEC_OUTPUT_JOURNAL || | |
2317 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2318 | c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2319 | c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { | |
f8b69d1d | 2320 | |
5ce70e5b | 2321 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 2322 | |
5ce70e5b ZJS |
2323 | log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
2324 | log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
f8b69d1d | 2325 | |
94f04347 LP |
2326 | fprintf(f, |
2327 | "%sSyslogFacility: %s\n" | |
2328 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
2329 | prefix, strna(fac_str), |
2330 | prefix, strna(lvl_str)); | |
f8b69d1d | 2331 | } |
94f04347 LP |
2332 | |
2333 | if (c->capabilities) { | |
5ce70e5b ZJS |
2334 | _cleanup_cap_free_charp_ char *t; |
2335 | ||
2336 | t = cap_to_text(c->capabilities, NULL); | |
2337 | if (t) | |
2338 | fprintf(f, "%sCapabilities: %s\n", prefix, t); | |
94f04347 LP |
2339 | } |
2340 | ||
2341 | if (c->secure_bits) | |
2342 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
2343 | prefix, | |
cbb21cca ZJS |
2344 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
2345 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
2346 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
2347 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
2348 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
2349 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 LP |
2350 | |
2351 | if (c->capability_bounding_set_drop) { | |
ae556c21 | 2352 | unsigned long l; |
260abb78 | 2353 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2354 | |
64685e0c | 2355 | for (l = 0; l <= cap_last_cap(); l++) |
2822da4f LP |
2356 | if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) |
2357 | fprintf(f, " %s", strna(capability_to_name(l))); | |
94f04347 LP |
2358 | |
2359 | fputs("\n", f); | |
2360 | } | |
2361 | ||
2362 | if (c->user) | |
f2d3769a | 2363 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2364 | if (c->group) |
f2d3769a | 2365 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2366 | |
15ae422b | 2367 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2368 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2369 | strv_fprintf(f, c->supplementary_groups); |
2370 | fputs("\n", f); | |
2371 | } | |
94f04347 | 2372 | |
5b6319dc | 2373 | if (c->pam_name) |
f2d3769a | 2374 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2375 | |
15ae422b LP |
2376 | if (strv_length(c->read_write_dirs) > 0) { |
2377 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2378 | strv_fprintf(f, c->read_write_dirs); | |
2379 | fputs("\n", f); | |
2380 | } | |
2381 | ||
2382 | if (strv_length(c->read_only_dirs) > 0) { | |
2383 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2384 | strv_fprintf(f, c->read_only_dirs); | |
2385 | fputs("\n", f); | |
2386 | } | |
94f04347 | 2387 | |
15ae422b LP |
2388 | if (strv_length(c->inaccessible_dirs) > 0) { |
2389 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2390 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2391 | fputs("\n", f); |
2392 | } | |
2e22afe9 | 2393 | |
169c1bda LP |
2394 | if (c->utmp_id) |
2395 | fprintf(f, | |
2396 | "%sUtmpIdentifier: %s\n", | |
2397 | prefix, c->utmp_id); | |
7b52a628 MS |
2398 | |
2399 | if (c->selinux_context) | |
2400 | fprintf(f, | |
5f8640fb LP |
2401 | "%sSELinuxContext: %s%s\n", |
2402 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 2403 | |
ac45f971 LP |
2404 | if (c->personality != 0xffffffffUL) |
2405 | fprintf(f, | |
2406 | "%sPersonality: %s\n", | |
2407 | prefix, strna(personality_to_string(c->personality))); | |
2408 | ||
17df7223 | 2409 | if (c->syscall_filter) { |
351a19b1 | 2410 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2411 | Iterator j; |
2412 | void *id; | |
2413 | bool first = true; | |
351a19b1 | 2414 | #endif |
17df7223 LP |
2415 | |
2416 | fprintf(f, | |
57183d11 | 2417 | "%sSystemCallFilter: ", |
17df7223 LP |
2418 | prefix); |
2419 | ||
2420 | if (!c->syscall_whitelist) | |
2421 | fputc('~', f); | |
2422 | ||
351a19b1 | 2423 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2424 | SET_FOREACH(id, c->syscall_filter, j) { |
2425 | _cleanup_free_ char *name = NULL; | |
2426 | ||
2427 | if (first) | |
2428 | first = false; | |
2429 | else | |
2430 | fputc(' ', f); | |
2431 | ||
57183d11 | 2432 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 LP |
2433 | fputs(strna(name), f); |
2434 | } | |
351a19b1 | 2435 | #endif |
17df7223 LP |
2436 | |
2437 | fputc('\n', f); | |
2438 | } | |
2439 | ||
57183d11 LP |
2440 | if (c->syscall_archs) { |
2441 | #ifdef HAVE_SECCOMP | |
2442 | Iterator j; | |
2443 | void *id; | |
2444 | #endif | |
2445 | ||
2446 | fprintf(f, | |
2447 | "%sSystemCallArchitectures:", | |
2448 | prefix); | |
2449 | ||
2450 | #ifdef HAVE_SECCOMP | |
2451 | SET_FOREACH(id, c->syscall_archs, j) | |
2452 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); | |
2453 | #endif | |
2454 | fputc('\n', f); | |
2455 | } | |
2456 | ||
17df7223 LP |
2457 | if (c->syscall_errno != 0) |
2458 | fprintf(f, | |
2459 | "%sSystemCallErrorNumber: %s\n", | |
2460 | prefix, strna(errno_to_name(c->syscall_errno))); | |
eef65bf3 MS |
2461 | |
2462 | if (c->apparmor_profile) | |
2463 | fprintf(f, | |
2464 | "%sAppArmorProfile: %s%s\n", | |
2465 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
5cb5a6ff LP |
2466 | } |
2467 | ||
a931ad47 LP |
2468 | bool exec_context_maintains_privileges(ExecContext *c) { |
2469 | assert(c); | |
2470 | ||
2471 | /* Returns true if the process forked off would run run under | |
2472 | * an unchanged UID or as root. */ | |
2473 | ||
2474 | if (!c->user) | |
2475 | return true; | |
2476 | ||
2477 | if (streq(c->user, "root") || streq(c->user, "0")) | |
2478 | return true; | |
2479 | ||
2480 | return false; | |
2481 | } | |
2482 | ||
b58b4116 | 2483 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2484 | assert(s); |
5cb5a6ff | 2485 | |
b58b4116 LP |
2486 | zero(*s); |
2487 | s->pid = pid; | |
2488 | dual_timestamp_get(&s->start_timestamp); | |
2489 | } | |
2490 | ||
6ea832a2 | 2491 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2492 | assert(s); |
2493 | ||
0b1f4ae6 | 2494 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2495 | zero(*s); |
2496 | ||
034c6ed7 | 2497 | s->pid = pid; |
63983207 | 2498 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2499 | |
034c6ed7 LP |
2500 | s->code = code; |
2501 | s->status = status; | |
169c1bda | 2502 | |
6ea832a2 LP |
2503 | if (context) { |
2504 | if (context->utmp_id) | |
2505 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2506 | ||
2507 | exec_context_tty_reset(context); | |
2508 | } | |
9fb86720 LP |
2509 | } |
2510 | ||
2511 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2512 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2513 | ||
2514 | assert(s); | |
2515 | assert(f); | |
2516 | ||
9fb86720 LP |
2517 | if (s->pid <= 0) |
2518 | return; | |
2519 | ||
4c940960 LP |
2520 | prefix = strempty(prefix); |
2521 | ||
9fb86720 | 2522 | fprintf(f, |
ccd06097 ZJS |
2523 | "%sPID: "PID_FMT"\n", |
2524 | prefix, s->pid); | |
9fb86720 | 2525 | |
63983207 | 2526 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2527 | fprintf(f, |
2528 | "%sStart Timestamp: %s\n", | |
63983207 | 2529 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2530 | |
63983207 | 2531 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2532 | fprintf(f, |
2533 | "%sExit Timestamp: %s\n" | |
2534 | "%sExit Code: %s\n" | |
2535 | "%sExit Status: %i\n", | |
63983207 | 2536 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2537 | prefix, sigchld_code_to_string(s->code), |
2538 | prefix, s->status); | |
5cb5a6ff | 2539 | } |
44d8db9e | 2540 | |
9e2f7c11 | 2541 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2542 | size_t k; |
2543 | char *n, *p, **a; | |
2544 | bool first = true; | |
2545 | ||
9e2f7c11 | 2546 | assert(argv); |
44d8db9e | 2547 | |
9164977d | 2548 | k = 1; |
9e2f7c11 | 2549 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2550 | k += strlen(*a)+3; |
2551 | ||
2552 | if (!(n = new(char, k))) | |
2553 | return NULL; | |
2554 | ||
2555 | p = n; | |
9e2f7c11 | 2556 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2557 | |
2558 | if (!first) | |
2559 | *(p++) = ' '; | |
2560 | else | |
2561 | first = false; | |
2562 | ||
2563 | if (strpbrk(*a, WHITESPACE)) { | |
2564 | *(p++) = '\''; | |
2565 | p = stpcpy(p, *a); | |
2566 | *(p++) = '\''; | |
2567 | } else | |
2568 | p = stpcpy(p, *a); | |
2569 | ||
2570 | } | |
2571 | ||
9164977d LP |
2572 | *p = 0; |
2573 | ||
44d8db9e LP |
2574 | /* FIXME: this doesn't really handle arguments that have |
2575 | * spaces and ticks in them */ | |
2576 | ||
2577 | return n; | |
2578 | } | |
2579 | ||
2580 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
e1d75803 | 2581 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 2582 | const char *prefix2; |
44d8db9e LP |
2583 | |
2584 | assert(c); | |
2585 | assert(f); | |
2586 | ||
4c940960 | 2587 | prefix = strempty(prefix); |
63c372cb | 2588 | prefix2 = strjoina(prefix, "\t"); |
44d8db9e | 2589 | |
9e2f7c11 | 2590 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2591 | fprintf(f, |
2592 | "%sCommand Line: %s\n", | |
2593 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2594 | ||
9fb86720 | 2595 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
2596 | } |
2597 | ||
2598 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2599 | assert(f); | |
2600 | ||
4c940960 | 2601 | prefix = strempty(prefix); |
44d8db9e LP |
2602 | |
2603 | LIST_FOREACH(command, c, c) | |
2604 | exec_command_dump(c, f, prefix); | |
2605 | } | |
94f04347 | 2606 | |
a6a80b4f LP |
2607 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2608 | ExecCommand *end; | |
2609 | ||
2610 | assert(l); | |
2611 | assert(e); | |
2612 | ||
2613 | if (*l) { | |
35b8ca3a | 2614 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2615 | LIST_FIND_TAIL(command, *l, end); |
2616 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2617 | } else |
2618 | *l = e; | |
2619 | } | |
2620 | ||
26fd040d LP |
2621 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2622 | va_list ap; | |
2623 | char **l, *p; | |
2624 | ||
2625 | assert(c); | |
2626 | assert(path); | |
2627 | ||
2628 | va_start(ap, path); | |
2629 | l = strv_new_ap(path, ap); | |
2630 | va_end(ap); | |
2631 | ||
2632 | if (!l) | |
2633 | return -ENOMEM; | |
2634 | ||
250a918d LP |
2635 | p = strdup(path); |
2636 | if (!p) { | |
26fd040d LP |
2637 | strv_free(l); |
2638 | return -ENOMEM; | |
2639 | } | |
2640 | ||
2641 | free(c->path); | |
2642 | c->path = p; | |
2643 | ||
2644 | strv_free(c->argv); | |
2645 | c->argv = l; | |
2646 | ||
2647 | return 0; | |
2648 | } | |
2649 | ||
86b23b07 | 2650 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 2651 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 2652 | va_list ap; |
86b23b07 JS |
2653 | int r; |
2654 | ||
2655 | assert(c); | |
2656 | assert(path); | |
2657 | ||
2658 | va_start(ap, path); | |
2659 | l = strv_new_ap(path, ap); | |
2660 | va_end(ap); | |
2661 | ||
2662 | if (!l) | |
2663 | return -ENOMEM; | |
2664 | ||
2665 | r = strv_extend_strv(&c->argv, l); | |
e63ff941 | 2666 | if (r < 0) |
86b23b07 | 2667 | return r; |
86b23b07 JS |
2668 | |
2669 | return 0; | |
2670 | } | |
2671 | ||
2672 | ||
613b411c LP |
2673 | static int exec_runtime_allocate(ExecRuntime **rt) { |
2674 | ||
2675 | if (*rt) | |
2676 | return 0; | |
2677 | ||
2678 | *rt = new0(ExecRuntime, 1); | |
f146f5e1 | 2679 | if (!*rt) |
613b411c LP |
2680 | return -ENOMEM; |
2681 | ||
2682 | (*rt)->n_ref = 1; | |
2683 | (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1; | |
2684 | ||
2685 | return 0; | |
2686 | } | |
2687 | ||
2688 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) { | |
2689 | int r; | |
2690 | ||
2691 | assert(rt); | |
2692 | assert(c); | |
2693 | assert(id); | |
2694 | ||
2695 | if (*rt) | |
2696 | return 1; | |
2697 | ||
2698 | if (!c->private_network && !c->private_tmp) | |
2699 | return 0; | |
2700 | ||
2701 | r = exec_runtime_allocate(rt); | |
2702 | if (r < 0) | |
2703 | return r; | |
2704 | ||
2705 | if (c->private_network && (*rt)->netns_storage_socket[0] < 0) { | |
2706 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0) | |
2707 | return -errno; | |
2708 | } | |
2709 | ||
2710 | if (c->private_tmp && !(*rt)->tmp_dir) { | |
2711 | r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir); | |
2712 | if (r < 0) | |
2713 | return r; | |
2714 | } | |
2715 | ||
2716 | return 1; | |
2717 | } | |
2718 | ||
2719 | ExecRuntime *exec_runtime_ref(ExecRuntime *r) { | |
2720 | assert(r); | |
2721 | assert(r->n_ref > 0); | |
2722 | ||
2723 | r->n_ref++; | |
2724 | return r; | |
2725 | } | |
2726 | ||
2727 | ExecRuntime *exec_runtime_unref(ExecRuntime *r) { | |
2728 | ||
2729 | if (!r) | |
2730 | return NULL; | |
2731 | ||
2732 | assert(r->n_ref > 0); | |
2733 | ||
2734 | r->n_ref--; | |
2735 | if (r->n_ref <= 0) { | |
2736 | free(r->tmp_dir); | |
2737 | free(r->var_tmp_dir); | |
3d94f76c | 2738 | safe_close_pair(r->netns_storage_socket); |
613b411c LP |
2739 | free(r); |
2740 | } | |
2741 | ||
2742 | return NULL; | |
2743 | } | |
2744 | ||
2745 | int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds) { | |
2746 | assert(u); | |
2747 | assert(f); | |
2748 | assert(fds); | |
2749 | ||
2750 | if (!rt) | |
2751 | return 0; | |
2752 | ||
2753 | if (rt->tmp_dir) | |
2754 | unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir); | |
2755 | ||
2756 | if (rt->var_tmp_dir) | |
2757 | unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir); | |
2758 | ||
2759 | if (rt->netns_storage_socket[0] >= 0) { | |
2760 | int copy; | |
2761 | ||
2762 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); | |
2763 | if (copy < 0) | |
2764 | return copy; | |
2765 | ||
2766 | unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy); | |
2767 | } | |
2768 | ||
2769 | if (rt->netns_storage_socket[1] >= 0) { | |
2770 | int copy; | |
2771 | ||
2772 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); | |
2773 | if (copy < 0) | |
2774 | return copy; | |
2775 | ||
2776 | unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy); | |
2777 | } | |
2778 | ||
2779 | return 0; | |
2780 | } | |
2781 | ||
2782 | int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds) { | |
2783 | int r; | |
2784 | ||
2785 | assert(rt); | |
2786 | assert(key); | |
2787 | assert(value); | |
2788 | ||
2789 | if (streq(key, "tmp-dir")) { | |
2790 | char *copy; | |
2791 | ||
2792 | r = exec_runtime_allocate(rt); | |
2793 | if (r < 0) | |
2794 | return r; | |
2795 | ||
2796 | copy = strdup(value); | |
2797 | if (!copy) | |
2798 | return log_oom(); | |
2799 | ||
2800 | free((*rt)->tmp_dir); | |
2801 | (*rt)->tmp_dir = copy; | |
2802 | ||
2803 | } else if (streq(key, "var-tmp-dir")) { | |
2804 | char *copy; | |
2805 | ||
2806 | r = exec_runtime_allocate(rt); | |
2807 | if (r < 0) | |
2808 | return r; | |
2809 | ||
2810 | copy = strdup(value); | |
2811 | if (!copy) | |
2812 | return log_oom(); | |
2813 | ||
2814 | free((*rt)->var_tmp_dir); | |
2815 | (*rt)->var_tmp_dir = copy; | |
2816 | ||
2817 | } else if (streq(key, "netns-socket-0")) { | |
2818 | int fd; | |
2819 | ||
2820 | r = exec_runtime_allocate(rt); | |
2821 | if (r < 0) | |
2822 | return r; | |
2823 | ||
2824 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2825 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2826 | else { |
03e334a1 | 2827 | safe_close((*rt)->netns_storage_socket[0]); |
613b411c LP |
2828 | (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd); |
2829 | } | |
2830 | } else if (streq(key, "netns-socket-1")) { | |
2831 | int fd; | |
2832 | ||
2833 | r = exec_runtime_allocate(rt); | |
2834 | if (r < 0) | |
2835 | return r; | |
2836 | ||
2837 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2838 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2839 | else { |
03e334a1 | 2840 | safe_close((*rt)->netns_storage_socket[1]); |
613b411c LP |
2841 | (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd); |
2842 | } | |
2843 | } else | |
2844 | return 0; | |
2845 | ||
2846 | return 1; | |
2847 | } | |
2848 | ||
2849 | static void *remove_tmpdir_thread(void *p) { | |
2850 | _cleanup_free_ char *path = p; | |
2851 | ||
c6878637 | 2852 | (void) rm_rf(path, REMOVE_ROOT|REMOVE_PHYSICAL); |
613b411c LP |
2853 | return NULL; |
2854 | } | |
2855 | ||
2856 | void exec_runtime_destroy(ExecRuntime *rt) { | |
98b47d54 LP |
2857 | int r; |
2858 | ||
613b411c LP |
2859 | if (!rt) |
2860 | return; | |
2861 | ||
2862 | /* If there are multiple users of this, let's leave the stuff around */ | |
2863 | if (rt->n_ref > 1) | |
2864 | return; | |
2865 | ||
2866 | if (rt->tmp_dir) { | |
2867 | log_debug("Spawning thread to nuke %s", rt->tmp_dir); | |
98b47d54 LP |
2868 | |
2869 | r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir); | |
2870 | if (r < 0) { | |
da927ba9 | 2871 | log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir); |
98b47d54 LP |
2872 | free(rt->tmp_dir); |
2873 | } | |
2874 | ||
613b411c LP |
2875 | rt->tmp_dir = NULL; |
2876 | } | |
2877 | ||
2878 | if (rt->var_tmp_dir) { | |
2879 | log_debug("Spawning thread to nuke %s", rt->var_tmp_dir); | |
98b47d54 LP |
2880 | |
2881 | r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir); | |
2882 | if (r < 0) { | |
da927ba9 | 2883 | log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir); |
98b47d54 LP |
2884 | free(rt->var_tmp_dir); |
2885 | } | |
2886 | ||
613b411c LP |
2887 | rt->var_tmp_dir = NULL; |
2888 | } | |
2889 | ||
3d94f76c | 2890 | safe_close_pair(rt->netns_storage_socket); |
613b411c LP |
2891 | } |
2892 | ||
80876c20 LP |
2893 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
2894 | [EXEC_INPUT_NULL] = "null", | |
2895 | [EXEC_INPUT_TTY] = "tty", | |
2896 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
2897 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
2898 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
2899 | }; |
2900 | ||
8a0867d6 LP |
2901 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
2902 | ||
94f04347 | 2903 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 2904 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 2905 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 2906 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 2907 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 2908 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 2909 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 2910 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
2911 | [EXEC_OUTPUT_JOURNAL] = "journal", |
2912 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 2913 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
2914 | }; |
2915 | ||
2916 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); |