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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
5cb5a6ff | 22 | #include <assert.h> |
034c6ed7 LP |
23 | #include <dirent.h> |
24 | #include <errno.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
44d8db9e | 27 | #include <string.h> |
309bff19 | 28 | #include <signal.h> |
071830ff LP |
29 | #include <sys/socket.h> |
30 | #include <sys/un.h> | |
94f04347 | 31 | #include <sys/prctl.h> |
66ee3769 | 32 | #include <linux/sched.h> |
451a074f LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
81a2b7ce LP |
35 | #include <grp.h> |
36 | #include <pwd.h> | |
15ae422b | 37 | #include <sys/mount.h> |
25e870b5 | 38 | #include <linux/fs.h> |
dd6c17b1 | 39 | #include <linux/oom.h> |
f2b68789 | 40 | #include <sys/poll.h> |
2bef10ab | 41 | #include <glob.h> |
ac45f971 | 42 | #include <sys/personality.h> |
d34cd374 | 43 | #include <libgen.h> |
2b6bf07d | 44 | #undef basename |
5cb5a6ff | 45 | |
5b6319dc LP |
46 | #ifdef HAVE_PAM |
47 | #include <security/pam_appl.h> | |
48 | #endif | |
49 | ||
7b52a628 MS |
50 | #ifdef HAVE_SELINUX |
51 | #include <selinux/selinux.h> | |
52 | #endif | |
53 | ||
17df7223 LP |
54 | #ifdef HAVE_SECCOMP |
55 | #include <seccomp.h> | |
56 | #endif | |
57 | ||
eef65bf3 MS |
58 | #ifdef HAVE_APPARMOR |
59 | #include <sys/apparmor.h> | |
60 | #endif | |
61 | ||
5cb5a6ff LP |
62 | #include "execute.h" |
63 | #include "strv.h" | |
64 | #include "macro.h" | |
d7832d2c | 65 | #include "capability.h" |
5cb5a6ff | 66 | #include "util.h" |
acbb0225 | 67 | #include "log.h" |
20ad4cfd | 68 | #include "sd-messages.h" |
9eba9da4 | 69 | #include "ioprio.h" |
94f04347 | 70 | #include "securebits.h" |
15ae422b | 71 | #include "namespace.h" |
d06dacd0 | 72 | #include "exit-status.h" |
dd6c17b1 | 73 | #include "missing.h" |
169c1bda | 74 | #include "utmp-wtmp.h" |
f6a6225e | 75 | #include "def.h" |
9eb977db | 76 | #include "path-util.h" |
4d1a6904 | 77 | #include "env-util.h" |
a5c32cff | 78 | #include "fileio.h" |
4ad49000 | 79 | #include "unit.h" |
f485606b | 80 | #include "async.h" |
0d3f7bb3 | 81 | #include "selinux-util.h" |
17df7223 | 82 | #include "errno-list.h" |
4298d0b5 | 83 | #include "af-list.h" |
e66cf1a3 | 84 | #include "mkdir.h" |
eef65bf3 | 85 | #include "apparmor-util.h" |
2ca620c4 | 86 | #include "smack-util.h" |
e44da745 | 87 | #include "bus-kernel.h" |
16115b0a | 88 | #include "label.h" |
5cb5a6ff | 89 | |
57183d11 LP |
90 | #ifdef HAVE_SECCOMP |
91 | #include "seccomp-util.h" | |
92 | #endif | |
93 | ||
e056b01d | 94 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 95 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 96 | |
02a51aba LP |
97 | /* This assumes there is a 'tty' group */ |
98 | #define TTY_MODE 0620 | |
99 | ||
531dca78 LP |
100 | #define SNDBUF_SIZE (8*1024*1024) |
101 | ||
034c6ed7 LP |
102 | static int shift_fds(int fds[], unsigned n_fds) { |
103 | int start, restart_from; | |
104 | ||
105 | if (n_fds <= 0) | |
106 | return 0; | |
107 | ||
a0d40ac5 LP |
108 | /* Modifies the fds array! (sorts it) */ |
109 | ||
034c6ed7 LP |
110 | assert(fds); |
111 | ||
112 | start = 0; | |
113 | for (;;) { | |
114 | int i; | |
115 | ||
116 | restart_from = -1; | |
117 | ||
118 | for (i = start; i < (int) n_fds; i++) { | |
119 | int nfd; | |
120 | ||
121 | /* Already at right index? */ | |
122 | if (fds[i] == i+3) | |
123 | continue; | |
124 | ||
125 | if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0) | |
126 | return -errno; | |
127 | ||
03e334a1 | 128 | safe_close(fds[i]); |
034c6ed7 LP |
129 | fds[i] = nfd; |
130 | ||
131 | /* Hmm, the fd we wanted isn't free? Then | |
132 | * let's remember that and try again from here*/ | |
133 | if (nfd != i+3 && restart_from < 0) | |
134 | restart_from = i; | |
135 | } | |
136 | ||
137 | if (restart_from < 0) | |
138 | break; | |
139 | ||
140 | start = restart_from; | |
141 | } | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
c2748801 | 146 | static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) { |
47a71eed | 147 | unsigned i; |
e2c76839 | 148 | int r; |
47a71eed LP |
149 | |
150 | if (n_fds <= 0) | |
151 | return 0; | |
152 | ||
153 | assert(fds); | |
154 | ||
451a074f | 155 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */ |
47a71eed LP |
156 | |
157 | for (i = 0; i < n_fds; i++) { | |
47a71eed | 158 | |
e2c76839 LP |
159 | if ((r = fd_nonblock(fds[i], nonblock)) < 0) |
160 | return r; | |
47a71eed | 161 | |
451a074f LP |
162 | /* We unconditionally drop FD_CLOEXEC from the fds, |
163 | * since after all we want to pass these fds to our | |
164 | * children */ | |
47a71eed | 165 | |
e2c76839 LP |
166 | if ((r = fd_cloexec(fds[i], false)) < 0) |
167 | return r; | |
47a71eed LP |
168 | } |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
44a6b1b6 | 173 | _pure_ static const char *tty_path(const ExecContext *context) { |
80876c20 LP |
174 | assert(context); |
175 | ||
176 | if (context->tty_path) | |
177 | return context->tty_path; | |
178 | ||
179 | return "/dev/console"; | |
180 | } | |
181 | ||
9588bc32 | 182 | static void exec_context_tty_reset(const ExecContext *context) { |
6ea832a2 LP |
183 | assert(context); |
184 | ||
185 | if (context->tty_vhangup) | |
186 | terminal_vhangup(tty_path(context)); | |
187 | ||
188 | if (context->tty_reset) | |
189 | reset_terminal(tty_path(context)); | |
190 | ||
191 | if (context->tty_vt_disallocate && context->tty_path) | |
192 | vt_disallocate(context->tty_path); | |
193 | } | |
194 | ||
3a1286b6 MS |
195 | static bool is_terminal_output(ExecOutput o) { |
196 | return | |
197 | o == EXEC_OUTPUT_TTY || | |
198 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
199 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
200 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
201 | } | |
202 | ||
80876c20 LP |
203 | static int open_null_as(int flags, int nfd) { |
204 | int fd, r; | |
071830ff | 205 | |
80876c20 | 206 | assert(nfd >= 0); |
071830ff | 207 | |
613b411c LP |
208 | fd = open("/dev/null", flags|O_NOCTTY); |
209 | if (fd < 0) | |
071830ff LP |
210 | return -errno; |
211 | ||
80876c20 LP |
212 | if (fd != nfd) { |
213 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 214 | safe_close(fd); |
80876c20 LP |
215 | } else |
216 | r = nfd; | |
071830ff | 217 | |
80876c20 | 218 | return r; |
071830ff LP |
219 | } |
220 | ||
62bca2c6 | 221 | static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, const char *unit_id, int nfd) { |
80876c20 | 222 | int fd, r; |
b92bea5d ZJS |
223 | union sockaddr_union sa = { |
224 | .un.sun_family = AF_UNIX, | |
225 | .un.sun_path = "/run/systemd/journal/stdout", | |
226 | }; | |
071830ff LP |
227 | |
228 | assert(context); | |
80876c20 LP |
229 | assert(output < _EXEC_OUTPUT_MAX); |
230 | assert(ident); | |
231 | assert(nfd >= 0); | |
071830ff | 232 | |
54fe0cdb LP |
233 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
234 | if (fd < 0) | |
80876c20 | 235 | return -errno; |
071830ff | 236 | |
54fe0cdb LP |
237 | r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); |
238 | if (r < 0) { | |
03e334a1 | 239 | safe_close(fd); |
80876c20 LP |
240 | return -errno; |
241 | } | |
071830ff | 242 | |
80876c20 | 243 | if (shutdown(fd, SHUT_RD) < 0) { |
03e334a1 | 244 | safe_close(fd); |
80876c20 LP |
245 | return -errno; |
246 | } | |
071830ff | 247 | |
531dca78 LP |
248 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
249 | ||
80876c20 | 250 | dprintf(fd, |
62bca2c6 | 251 | "%s\n" |
80876c20 LP |
252 | "%s\n" |
253 | "%i\n" | |
54fe0cdb LP |
254 | "%i\n" |
255 | "%i\n" | |
256 | "%i\n" | |
4f4a1dbf | 257 | "%i\n", |
4f4a1dbf | 258 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 259 | unit_id, |
54fe0cdb LP |
260 | context->syslog_priority, |
261 | !!context->syslog_level_prefix, | |
262 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
263 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 264 | is_terminal_output(output)); |
80876c20 LP |
265 | |
266 | if (fd != nfd) { | |
267 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 268 | safe_close(fd); |
80876c20 LP |
269 | } else |
270 | r = nfd; | |
071830ff | 271 | |
80876c20 LP |
272 | return r; |
273 | } | |
274 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
275 | int fd, r; | |
071830ff | 276 | |
80876c20 LP |
277 | assert(path); |
278 | assert(nfd >= 0); | |
071830ff | 279 | |
80876c20 LP |
280 | if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0) |
281 | return fd; | |
071830ff | 282 | |
80876c20 LP |
283 | if (fd != nfd) { |
284 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
03e334a1 | 285 | safe_close(fd); |
80876c20 LP |
286 | } else |
287 | r = nfd; | |
071830ff | 288 | |
80876c20 LP |
289 | return r; |
290 | } | |
071830ff | 291 | |
80876c20 LP |
292 | static bool is_terminal_input(ExecInput i) { |
293 | return | |
294 | i == EXEC_INPUT_TTY || | |
295 | i == EXEC_INPUT_TTY_FORCE || | |
296 | i == EXEC_INPUT_TTY_FAIL; | |
297 | } | |
071830ff | 298 | |
1e3ad081 LP |
299 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
300 | ||
301 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
302 | return EXEC_INPUT_NULL; | |
071830ff | 303 | |
03fd9c49 | 304 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
305 | return EXEC_INPUT_NULL; |
306 | ||
03fd9c49 | 307 | return std_input; |
4f2d528d LP |
308 | } |
309 | ||
03fd9c49 | 310 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 311 | |
03fd9c49 | 312 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
313 | return EXEC_OUTPUT_INHERIT; |
314 | ||
03fd9c49 | 315 | return std_output; |
4f2d528d LP |
316 | } |
317 | ||
1e3ad081 | 318 | static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) { |
4f2d528d LP |
319 | ExecInput i; |
320 | ||
321 | assert(context); | |
322 | ||
1e3ad081 | 323 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
4f2d528d LP |
324 | |
325 | switch (i) { | |
071830ff | 326 | |
80876c20 LP |
327 | case EXEC_INPUT_NULL: |
328 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
329 | ||
330 | case EXEC_INPUT_TTY: | |
331 | case EXEC_INPUT_TTY_FORCE: | |
332 | case EXEC_INPUT_TTY_FAIL: { | |
333 | int fd, r; | |
071830ff | 334 | |
970edce6 ZJS |
335 | fd = acquire_terminal(tty_path(context), |
336 | i == EXEC_INPUT_TTY_FAIL, | |
337 | i == EXEC_INPUT_TTY_FORCE, | |
338 | false, | |
3a43da28 | 339 | USEC_INFINITY); |
970edce6 | 340 | if (fd < 0) |
80876c20 LP |
341 | return fd; |
342 | ||
343 | if (fd != STDIN_FILENO) { | |
344 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
03e334a1 | 345 | safe_close(fd); |
80876c20 LP |
346 | } else |
347 | r = STDIN_FILENO; | |
348 | ||
349 | return r; | |
350 | } | |
351 | ||
4f2d528d LP |
352 | case EXEC_INPUT_SOCKET: |
353 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
354 | ||
80876c20 LP |
355 | default: |
356 | assert_not_reached("Unknown input type"); | |
357 | } | |
358 | } | |
359 | ||
eb17e935 | 360 | static int setup_output(const ExecContext *context, int fileno, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin) { |
4f2d528d LP |
361 | ExecOutput o; |
362 | ExecInput i; | |
47c1d80d | 363 | int r; |
4f2d528d | 364 | |
80876c20 LP |
365 | assert(context); |
366 | assert(ident); | |
367 | ||
1e3ad081 | 368 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
03fd9c49 | 369 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 370 | |
eb17e935 MS |
371 | if (fileno == STDERR_FILENO) { |
372 | ExecOutput e; | |
373 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 374 | |
eb17e935 MS |
375 | /* This expects the input and output are already set up */ |
376 | ||
377 | /* Don't change the stderr file descriptor if we inherit all | |
378 | * the way and are not on a tty */ | |
379 | if (e == EXEC_OUTPUT_INHERIT && | |
380 | o == EXEC_OUTPUT_INHERIT && | |
381 | i == EXEC_INPUT_NULL && | |
382 | !is_terminal_input(context->std_input) && | |
383 | getppid () != 1) | |
384 | return fileno; | |
385 | ||
386 | /* Duplicate from stdout if possible */ | |
387 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
388 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 389 | |
eb17e935 | 390 | o = e; |
80876c20 | 391 | |
eb17e935 | 392 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
393 | /* If input got downgraded, inherit the original value */ |
394 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
eb17e935 | 395 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 396 | |
acb591e4 | 397 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 398 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 399 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 400 | |
acb591e4 LP |
401 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
402 | if (getppid() != 1) | |
eb17e935 | 403 | return fileno; |
94f04347 | 404 | |
eb17e935 MS |
405 | /* We need to open /dev/null here anew, to get the right access mode. */ |
406 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 407 | } |
94f04347 | 408 | |
eb17e935 | 409 | switch (o) { |
80876c20 LP |
410 | |
411 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 412 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
413 | |
414 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 415 | if (is_terminal_input(i)) |
eb17e935 | 416 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
417 | |
418 | /* We don't reset the terminal if this is just about output */ | |
eb17e935 | 419 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
420 | |
421 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 422 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 423 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 424 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
425 | case EXEC_OUTPUT_JOURNAL: |
426 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
eb17e935 | 427 | r = connect_logger_as(context, o, ident, unit_id, fileno); |
47c1d80d | 428 | if (r < 0) { |
79008bdd | 429 | log_unit_struct(LOG_CRIT, unit_id, |
80cbda35 | 430 | "MESSAGE=Failed to connect std%s of %s to the journal socket: %s", |
eb17e935 | 431 | fileno == STDOUT_FILENO ? "out" : "err", |
80cbda35 MS |
432 | unit_id, strerror(-r), |
433 | "ERRNO=%d", -r, | |
434 | NULL); | |
eb17e935 | 435 | r = open_null_as(O_WRONLY, fileno); |
47c1d80d MS |
436 | } |
437 | return r; | |
4f2d528d LP |
438 | |
439 | case EXEC_OUTPUT_SOCKET: | |
440 | assert(socket_fd >= 0); | |
eb17e935 | 441 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
442 | |
443 | default: | |
80876c20 | 444 | assert_not_reached("Unknown error type"); |
94f04347 | 445 | } |
071830ff LP |
446 | } |
447 | ||
02a51aba LP |
448 | static int chown_terminal(int fd, uid_t uid) { |
449 | struct stat st; | |
450 | ||
451 | assert(fd >= 0); | |
02a51aba LP |
452 | |
453 | /* This might fail. What matters are the results. */ | |
bab45044 LP |
454 | (void) fchown(fd, uid, -1); |
455 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
456 | |
457 | if (fstat(fd, &st) < 0) | |
458 | return -errno; | |
459 | ||
d8b4e2e9 | 460 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
461 | return -EPERM; |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
af6da548 | 466 | static int setup_confirm_stdio(int *_saved_stdin, |
80876c20 LP |
467 | int *_saved_stdout) { |
468 | int fd = -1, saved_stdin, saved_stdout = -1, r; | |
469 | ||
80876c20 LP |
470 | assert(_saved_stdin); |
471 | assert(_saved_stdout); | |
472 | ||
af6da548 LP |
473 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
474 | if (saved_stdin < 0) | |
475 | return -errno; | |
80876c20 | 476 | |
af6da548 LP |
477 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
478 | if (saved_stdout < 0) { | |
479 | r = errno; | |
80876c20 LP |
480 | goto fail; |
481 | } | |
482 | ||
af6da548 LP |
483 | fd = acquire_terminal( |
484 | "/dev/console", | |
485 | false, | |
486 | false, | |
487 | false, | |
488 | DEFAULT_CONFIRM_USEC); | |
489 | if (fd < 0) { | |
490 | r = fd; | |
80876c20 LP |
491 | goto fail; |
492 | } | |
493 | ||
af6da548 LP |
494 | r = chown_terminal(fd, getuid()); |
495 | if (r < 0) | |
02a51aba | 496 | goto fail; |
02a51aba | 497 | |
80876c20 | 498 | if (dup2(fd, STDIN_FILENO) < 0) { |
af6da548 | 499 | r = -errno; |
80876c20 LP |
500 | goto fail; |
501 | } | |
502 | ||
503 | if (dup2(fd, STDOUT_FILENO) < 0) { | |
af6da548 | 504 | r = -errno; |
80876c20 LP |
505 | goto fail; |
506 | } | |
507 | ||
508 | if (fd >= 2) | |
03e334a1 | 509 | safe_close(fd); |
80876c20 LP |
510 | |
511 | *_saved_stdin = saved_stdin; | |
512 | *_saved_stdout = saved_stdout; | |
513 | ||
514 | return 0; | |
515 | ||
516 | fail: | |
03e334a1 LP |
517 | safe_close(saved_stdout); |
518 | safe_close(saved_stdin); | |
519 | safe_close(fd); | |
80876c20 LP |
520 | |
521 | return r; | |
522 | } | |
523 | ||
44b601bc | 524 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
03e334a1 | 525 | _cleanup_close_ int fd = -1; |
af6da548 | 526 | va_list ap; |
80876c20 | 527 | |
af6da548 | 528 | assert(format); |
80876c20 | 529 | |
af6da548 LP |
530 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
531 | if (fd < 0) | |
532 | return fd; | |
80876c20 | 533 | |
af6da548 LP |
534 | va_start(ap, format); |
535 | vdprintf(fd, format, ap); | |
536 | va_end(ap); | |
80876c20 | 537 | |
af6da548 LP |
538 | return 0; |
539 | } | |
80876c20 | 540 | |
af6da548 LP |
541 | static int restore_confirm_stdio(int *saved_stdin, |
542 | int *saved_stdout) { | |
80876c20 | 543 | |
af6da548 | 544 | int r = 0; |
80876c20 | 545 | |
af6da548 LP |
546 | assert(saved_stdin); |
547 | assert(saved_stdout); | |
548 | ||
549 | release_terminal(); | |
550 | ||
551 | if (*saved_stdin >= 0) | |
80876c20 | 552 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 553 | r = -errno; |
80876c20 | 554 | |
af6da548 | 555 | if (*saved_stdout >= 0) |
80876c20 | 556 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 557 | r = -errno; |
80876c20 | 558 | |
03e334a1 LP |
559 | safe_close(*saved_stdin); |
560 | safe_close(*saved_stdout); | |
af6da548 LP |
561 | |
562 | return r; | |
563 | } | |
564 | ||
565 | static int ask_for_confirmation(char *response, char **argv) { | |
566 | int saved_stdout = -1, saved_stdin = -1, r; | |
e1d75803 | 567 | _cleanup_free_ char *line = NULL; |
af6da548 LP |
568 | |
569 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
570 | if (r < 0) | |
571 | return r; | |
572 | ||
573 | line = exec_command_line(argv); | |
574 | if (!line) | |
575 | return -ENOMEM; | |
576 | ||
418b9be5 | 577 | r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line); |
af6da548 LP |
578 | |
579 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
580 | ||
581 | return r; | |
80876c20 LP |
582 | } |
583 | ||
81a2b7ce LP |
584 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
585 | bool keep_groups = false; | |
586 | int r; | |
587 | ||
588 | assert(context); | |
589 | ||
35b8ca3a | 590 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
591 | * we avoid NSS lookups for gid=0. */ |
592 | ||
593 | if (context->group || username) { | |
594 | ||
4b67834e LP |
595 | if (context->group) { |
596 | const char *g = context->group; | |
597 | ||
598 | if ((r = get_group_creds(&g, &gid)) < 0) | |
81a2b7ce | 599 | return r; |
4b67834e | 600 | } |
81a2b7ce LP |
601 | |
602 | /* First step, initialize groups from /etc/groups */ | |
603 | if (username && gid != 0) { | |
604 | if (initgroups(username, gid) < 0) | |
605 | return -errno; | |
606 | ||
607 | keep_groups = true; | |
608 | } | |
609 | ||
610 | /* Second step, set our gids */ | |
611 | if (setresgid(gid, gid, gid) < 0) | |
612 | return -errno; | |
613 | } | |
614 | ||
615 | if (context->supplementary_groups) { | |
616 | int ngroups_max, k; | |
617 | gid_t *gids; | |
618 | char **i; | |
619 | ||
620 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 621 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
622 | |
623 | if (!(gids = new(gid_t, ngroups_max))) | |
624 | return -ENOMEM; | |
625 | ||
626 | if (keep_groups) { | |
627 | if ((k = getgroups(ngroups_max, gids)) < 0) { | |
628 | free(gids); | |
629 | return -errno; | |
630 | } | |
631 | } else | |
632 | k = 0; | |
633 | ||
634 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 635 | const char *g; |
81a2b7ce LP |
636 | |
637 | if (k >= ngroups_max) { | |
638 | free(gids); | |
639 | return -E2BIG; | |
640 | } | |
641 | ||
4b67834e LP |
642 | g = *i; |
643 | r = get_group_creds(&g, gids+k); | |
644 | if (r < 0) { | |
81a2b7ce LP |
645 | free(gids); |
646 | return r; | |
647 | } | |
648 | ||
649 | k++; | |
650 | } | |
651 | ||
652 | if (setgroups(k, gids) < 0) { | |
653 | free(gids); | |
654 | return -errno; | |
655 | } | |
656 | ||
657 | free(gids); | |
658 | } | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
81a2b7ce LP |
664 | assert(context); |
665 | ||
666 | /* Sets (but doesn't lookup) the uid and make sure we keep the | |
667 | * capabilities while doing so. */ | |
668 | ||
669 | if (context->capabilities) { | |
5ce70e5b | 670 | _cleanup_cap_free_ cap_t d = NULL; |
81a2b7ce LP |
671 | static const cap_value_t bits[] = { |
672 | CAP_SETUID, /* Necessary so that we can run setresuid() below */ | |
673 | CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */ | |
674 | }; | |
675 | ||
676 | /* First step: If we need to keep capabilities but | |
677 | * drop privileges we need to make sure we keep our | |
cbb21cca | 678 | * caps, while we drop privileges. */ |
693ced48 | 679 | if (uid != 0) { |
cbb21cca | 680 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
681 | |
682 | if (prctl(PR_GET_SECUREBITS) != sb) | |
683 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
684 | return -errno; | |
685 | } | |
81a2b7ce | 686 | |
35b8ca3a | 687 | /* Second step: set the capabilities. This will reduce |
81a2b7ce LP |
688 | * the capabilities to the minimum we need. */ |
689 | ||
5ce70e5b ZJS |
690 | d = cap_dup(context->capabilities); |
691 | if (!d) | |
81a2b7ce LP |
692 | return -errno; |
693 | ||
694 | if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 || | |
5ce70e5b ZJS |
695 | cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) |
696 | return -errno; | |
81a2b7ce | 697 | |
5ce70e5b ZJS |
698 | if (cap_set_proc(d) < 0) |
699 | return -errno; | |
81a2b7ce LP |
700 | } |
701 | ||
702 | /* Third step: actually set the uids */ | |
703 | if (setresuid(uid, uid, uid) < 0) | |
704 | return -errno; | |
705 | ||
706 | /* At this point we should have all necessary capabilities but | |
707 | are otherwise a normal user. However, the caps might got | |
708 | corrupted due to the setresuid() so we need clean them up | |
709 | later. This is done outside of this call. */ | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
5b6319dc LP |
714 | #ifdef HAVE_PAM |
715 | ||
716 | static int null_conv( | |
717 | int num_msg, | |
718 | const struct pam_message **msg, | |
719 | struct pam_response **resp, | |
720 | void *appdata_ptr) { | |
721 | ||
722 | /* We don't support conversations */ | |
723 | ||
724 | return PAM_CONV_ERR; | |
725 | } | |
726 | ||
727 | static int setup_pam( | |
728 | const char *name, | |
729 | const char *user, | |
940c5210 | 730 | uid_t uid, |
5b6319dc LP |
731 | const char *tty, |
732 | char ***pam_env, | |
733 | int fds[], unsigned n_fds) { | |
734 | ||
735 | static const struct pam_conv conv = { | |
736 | .conv = null_conv, | |
737 | .appdata_ptr = NULL | |
738 | }; | |
739 | ||
740 | pam_handle_t *handle = NULL; | |
741 | sigset_t ss, old_ss; | |
742 | int pam_code = PAM_SUCCESS; | |
9ba35398 | 743 | int err; |
5b6319dc LP |
744 | char **e = NULL; |
745 | bool close_session = false; | |
746 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 747 | int flags = 0; |
5b6319dc LP |
748 | |
749 | assert(name); | |
750 | assert(user); | |
751 | assert(pam_env); | |
752 | ||
753 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 754 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
755 | * systemd via the cgroup logic. It will then remove the PAM |
756 | * session again. The parent process will exec() the actual | |
757 | * daemon. We do things this way to ensure that the main PID | |
758 | * of the daemon is the one we initially fork()ed. */ | |
759 | ||
970edce6 ZJS |
760 | if (log_get_max_level() < LOG_PRI(LOG_DEBUG)) |
761 | flags |= PAM_SILENT; | |
762 | ||
f546241b ZJS |
763 | pam_code = pam_start(name, user, &conv, &handle); |
764 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
765 | handle = NULL; |
766 | goto fail; | |
767 | } | |
768 | ||
f546241b ZJS |
769 | if (tty) { |
770 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
771 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 772 | goto fail; |
f546241b | 773 | } |
5b6319dc | 774 | |
970edce6 | 775 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 776 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
777 | goto fail; |
778 | ||
970edce6 | 779 | pam_code = pam_open_session(handle, flags); |
f546241b | 780 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
781 | goto fail; |
782 | ||
783 | close_session = true; | |
784 | ||
f546241b ZJS |
785 | e = pam_getenvlist(handle); |
786 | if (!e) { | |
5b6319dc LP |
787 | pam_code = PAM_BUF_ERR; |
788 | goto fail; | |
789 | } | |
790 | ||
791 | /* Block SIGTERM, so that we know that it won't get lost in | |
792 | * the child */ | |
793 | if (sigemptyset(&ss) < 0 || | |
794 | sigaddset(&ss, SIGTERM) < 0 || | |
795 | sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0) | |
796 | goto fail; | |
797 | ||
798 | parent_pid = getpid(); | |
799 | ||
f546241b ZJS |
800 | pam_pid = fork(); |
801 | if (pam_pid < 0) | |
5b6319dc LP |
802 | goto fail; |
803 | ||
804 | if (pam_pid == 0) { | |
805 | int sig; | |
806 | int r = EXIT_PAM; | |
807 | ||
808 | /* The child's job is to reset the PAM session on | |
809 | * termination */ | |
810 | ||
811 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
812 | * of "/sbin/init"), to look pretty in /bin/ps */ |
813 | rename_process("(sd-pam)"); | |
5b6319dc LP |
814 | |
815 | /* Make sure we don't keep open the passed fds in this | |
816 | child. We assume that otherwise only those fds are | |
817 | open here that have been opened by PAM. */ | |
818 | close_many(fds, n_fds); | |
819 | ||
940c5210 AK |
820 | /* Drop privileges - we don't need any to pam_close_session |
821 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
822 | * If this fails, ignore the error - but expect sd-pam threads | |
823 | * to fail to exit normally */ | |
824 | if (setresuid(uid, uid, uid) < 0) | |
825 | log_error("Error: Failed to setresuid() in sd-pam: %s", strerror(-r)); | |
826 | ||
827 | /* Wait until our parent died. This will only work if | |
828 | * the above setresuid() succeeds, otherwise the kernel | |
829 | * will not allow unprivileged parents kill their privileged | |
830 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
831 | * to do the rest for us. */ |
832 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
833 | goto child_finish; | |
834 | ||
835 | /* Check if our parent process might already have | |
836 | * died? */ | |
837 | if (getppid() == parent_pid) { | |
3dead8d9 LP |
838 | for (;;) { |
839 | if (sigwait(&ss, &sig) < 0) { | |
840 | if (errno == EINTR) | |
841 | continue; | |
842 | ||
843 | goto child_finish; | |
844 | } | |
5b6319dc | 845 | |
3dead8d9 LP |
846 | assert(sig == SIGTERM); |
847 | break; | |
848 | } | |
5b6319dc LP |
849 | } |
850 | ||
3dead8d9 | 851 | /* If our parent died we'll end the session */ |
f546241b | 852 | if (getppid() != parent_pid) { |
970edce6 | 853 | pam_code = pam_close_session(handle, flags); |
f546241b | 854 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 855 | goto child_finish; |
f546241b | 856 | } |
5b6319dc LP |
857 | |
858 | r = 0; | |
859 | ||
860 | child_finish: | |
970edce6 | 861 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
862 | _exit(r); |
863 | } | |
864 | ||
865 | /* If the child was forked off successfully it will do all the | |
866 | * cleanups, so forget about the handle here. */ | |
867 | handle = NULL; | |
868 | ||
3b8bddde | 869 | /* Unblock SIGTERM again in the parent */ |
5b6319dc LP |
870 | if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0) |
871 | goto fail; | |
872 | ||
873 | /* We close the log explicitly here, since the PAM modules | |
874 | * might have opened it, but we don't want this fd around. */ | |
875 | closelog(); | |
876 | ||
aa87e624 LP |
877 | *pam_env = e; |
878 | e = NULL; | |
879 | ||
5b6319dc LP |
880 | return 0; |
881 | ||
882 | fail: | |
970edce6 ZJS |
883 | if (pam_code != PAM_SUCCESS) { |
884 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
9ba35398 | 885 | err = -EPERM; /* PAM errors do not map to errno */ |
970edce6 ZJS |
886 | } else { |
887 | log_error("PAM failed: %m"); | |
9ba35398 | 888 | err = -errno; |
970edce6 | 889 | } |
9ba35398 | 890 | |
5b6319dc LP |
891 | if (handle) { |
892 | if (close_session) | |
970edce6 | 893 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 894 | |
970edce6 | 895 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
896 | } |
897 | ||
898 | strv_free(e); | |
899 | ||
900 | closelog(); | |
901 | ||
430c18ed | 902 | if (pam_pid > 1) { |
5b6319dc | 903 | kill(pam_pid, SIGTERM); |
430c18ed LP |
904 | kill(pam_pid, SIGCONT); |
905 | } | |
5b6319dc | 906 | |
9ba35398 | 907 | return err; |
5b6319dc LP |
908 | } |
909 | #endif | |
910 | ||
5d6b1584 LP |
911 | static void rename_process_from_path(const char *path) { |
912 | char process_name[11]; | |
913 | const char *p; | |
914 | size_t l; | |
915 | ||
916 | /* This resulting string must fit in 10 chars (i.e. the length | |
917 | * of "/sbin/init") to look pretty in /bin/ps */ | |
918 | ||
2b6bf07d | 919 | p = basename(path); |
5d6b1584 LP |
920 | if (isempty(p)) { |
921 | rename_process("(...)"); | |
922 | return; | |
923 | } | |
924 | ||
925 | l = strlen(p); | |
926 | if (l > 8) { | |
927 | /* The end of the process name is usually more | |
928 | * interesting, since the first bit might just be | |
929 | * "systemd-" */ | |
930 | p = p + l - 8; | |
931 | l = 8; | |
932 | } | |
933 | ||
934 | process_name[0] = '('; | |
935 | memcpy(process_name+1, p, l); | |
936 | process_name[1+l] = ')'; | |
937 | process_name[1+l+1] = 0; | |
938 | ||
939 | rename_process(process_name); | |
940 | } | |
941 | ||
c0467cf3 | 942 | #ifdef HAVE_SECCOMP |
17df7223 | 943 | |
822a5960 | 944 | static int apply_seccomp(const ExecContext *c) { |
17df7223 LP |
945 | uint32_t negative_action, action; |
946 | scmp_filter_ctx *seccomp; | |
c0467cf3 RC |
947 | Iterator i; |
948 | void *id; | |
17df7223 | 949 | int r; |
8351ceae | 950 | |
c0467cf3 | 951 | assert(c); |
8351ceae | 952 | |
17df7223 LP |
953 | negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno); |
954 | ||
955 | seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW); | |
956 | if (!seccomp) | |
957 | return -ENOMEM; | |
8351ceae | 958 | |
e9642be2 LP |
959 | if (c->syscall_archs) { |
960 | ||
961 | SET_FOREACH(id, c->syscall_archs, i) { | |
962 | r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); | |
963 | if (r == -EEXIST) | |
964 | continue; | |
7c66bae2 LP |
965 | if (r < 0) |
966 | goto finish; | |
e9642be2 | 967 | } |
e9642be2 | 968 | |
7c66bae2 | 969 | } else { |
e9642be2 | 970 | r = seccomp_add_secondary_archs(seccomp); |
7c66bae2 LP |
971 | if (r < 0) |
972 | goto finish; | |
57183d11 | 973 | } |
8351ceae | 974 | |
57183d11 | 975 | action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action; |
17df7223 LP |
976 | SET_FOREACH(id, c->syscall_filter, i) { |
977 | r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0); | |
7c66bae2 LP |
978 | if (r < 0) |
979 | goto finish; | |
c0467cf3 | 980 | } |
8351ceae | 981 | |
7c66bae2 LP |
982 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); |
983 | if (r < 0) | |
984 | goto finish; | |
985 | ||
17df7223 | 986 | r = seccomp_load(seccomp); |
7c66bae2 LP |
987 | |
988 | finish: | |
17df7223 | 989 | seccomp_release(seccomp); |
4298d0b5 LP |
990 | return r; |
991 | } | |
992 | ||
822a5960 | 993 | static int apply_address_families(const ExecContext *c) { |
4298d0b5 LP |
994 | scmp_filter_ctx *seccomp; |
995 | Iterator i; | |
996 | int r; | |
997 | ||
998 | assert(c); | |
999 | ||
1000 | seccomp = seccomp_init(SCMP_ACT_ALLOW); | |
1001 | if (!seccomp) | |
1002 | return -ENOMEM; | |
1003 | ||
1004 | r = seccomp_add_secondary_archs(seccomp); | |
1005 | if (r < 0) | |
1006 | goto finish; | |
1007 | ||
1008 | if (c->address_families_whitelist) { | |
1009 | int af, first = 0, last = 0; | |
1010 | void *afp; | |
1011 | ||
1012 | /* If this is a whitelist, we first block the address | |
1013 | * families that are out of range and then everything | |
1014 | * that is not in the set. First, we find the lowest | |
1015 | * and highest address family in the set. */ | |
1016 | ||
1017 | SET_FOREACH(afp, c->address_families, i) { | |
1018 | af = PTR_TO_INT(afp); | |
17df7223 | 1019 | |
4298d0b5 LP |
1020 | if (af <= 0 || af >= af_max()) |
1021 | continue; | |
1022 | ||
1023 | if (first == 0 || af < first) | |
1024 | first = af; | |
1025 | ||
1026 | if (last == 0 || af > last) | |
1027 | last = af; | |
1028 | } | |
1029 | ||
1030 | assert((first == 0) == (last == 0)); | |
1031 | ||
1032 | if (first == 0) { | |
1033 | ||
1034 | /* No entries in the valid range, block everything */ | |
1035 | r = seccomp_rule_add( | |
1036 | seccomp, | |
1037 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1038 | SCMP_SYS(socket), | |
1039 | 0); | |
1040 | if (r < 0) | |
1041 | goto finish; | |
1042 | ||
1043 | } else { | |
1044 | ||
1045 | /* Block everything below the first entry */ | |
1046 | r = seccomp_rule_add( | |
1047 | seccomp, | |
1048 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1049 | SCMP_SYS(socket), | |
1050 | 1, | |
1051 | SCMP_A0(SCMP_CMP_LT, first)); | |
1052 | if (r < 0) | |
1053 | goto finish; | |
1054 | ||
1055 | /* Block everything above the last entry */ | |
1056 | r = seccomp_rule_add( | |
1057 | seccomp, | |
1058 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1059 | SCMP_SYS(socket), | |
1060 | 1, | |
1061 | SCMP_A0(SCMP_CMP_GT, last)); | |
1062 | if (r < 0) | |
1063 | goto finish; | |
1064 | ||
1065 | /* Block everything between the first and last | |
1066 | * entry */ | |
1067 | for (af = 1; af < af_max(); af++) { | |
1068 | ||
1069 | if (set_contains(c->address_families, INT_TO_PTR(af))) | |
1070 | continue; | |
1071 | ||
1072 | r = seccomp_rule_add( | |
1073 | seccomp, | |
1074 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1075 | SCMP_SYS(socket), | |
1076 | 1, | |
1077 | SCMP_A0(SCMP_CMP_EQ, af)); | |
1078 | if (r < 0) | |
1079 | goto finish; | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | } else { | |
1084 | void *af; | |
1085 | ||
1086 | /* If this is a blacklist, then generate one rule for | |
1087 | * each address family that are then combined in OR | |
1088 | * checks. */ | |
1089 | ||
1090 | SET_FOREACH(af, c->address_families, i) { | |
1091 | ||
1092 | r = seccomp_rule_add( | |
1093 | seccomp, | |
1094 | SCMP_ACT_ERRNO(EPROTONOSUPPORT), | |
1095 | SCMP_SYS(socket), | |
1096 | 1, | |
1097 | SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af))); | |
1098 | if (r < 0) | |
1099 | goto finish; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); | |
1104 | if (r < 0) | |
1105 | goto finish; | |
1106 | ||
1107 | r = seccomp_load(seccomp); | |
1108 | ||
1109 | finish: | |
1110 | seccomp_release(seccomp); | |
17df7223 | 1111 | return r; |
8351ceae | 1112 | } |
4298d0b5 | 1113 | |
c0467cf3 | 1114 | #endif |
8351ceae | 1115 | |
31a7eb86 ZJS |
1116 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
1117 | assert(idle_pipe); | |
1118 | ||
03e334a1 LP |
1119 | |
1120 | safe_close(idle_pipe[1]); | |
1121 | safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1122 | |
1123 | if (idle_pipe[0] >= 0) { | |
1124 | int r; | |
1125 | ||
1126 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1127 | ||
1128 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
1129 | /* Signal systemd that we are bored and want to continue. */ | |
1130 | write(idle_pipe[3], "x", 1); | |
1131 | ||
1132 | /* Wait for systemd to react to the signal above. */ | |
1133 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
1134 | } | |
1135 | ||
03e334a1 | 1136 | safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1137 | |
1138 | } | |
1139 | ||
03e334a1 | 1140 | safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1141 | } |
1142 | ||
7cae38c4 | 1143 | static int build_environment( |
9fa95f85 | 1144 | const ExecContext *c, |
7cae38c4 | 1145 | unsigned n_fds, |
09812eb7 | 1146 | usec_t watchdog_usec, |
7cae38c4 LP |
1147 | const char *home, |
1148 | const char *username, | |
1149 | const char *shell, | |
1150 | char ***ret) { | |
1151 | ||
1152 | _cleanup_strv_free_ char **our_env = NULL; | |
1153 | unsigned n_env = 0; | |
1154 | char *x; | |
1155 | ||
1156 | assert(c); | |
1157 | assert(ret); | |
1158 | ||
09812eb7 | 1159 | our_env = new0(char*, 10); |
7cae38c4 LP |
1160 | if (!our_env) |
1161 | return -ENOMEM; | |
1162 | ||
1163 | if (n_fds > 0) { | |
ccd06097 | 1164 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0) |
7cae38c4 LP |
1165 | return -ENOMEM; |
1166 | our_env[n_env++] = x; | |
1167 | ||
1168 | if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0) | |
1169 | return -ENOMEM; | |
1170 | our_env[n_env++] = x; | |
1171 | } | |
1172 | ||
09812eb7 | 1173 | if (watchdog_usec > 0) { |
ccd06097 | 1174 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0) |
09812eb7 LP |
1175 | return -ENOMEM; |
1176 | our_env[n_env++] = x; | |
1177 | ||
de0671ee | 1178 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, watchdog_usec) < 0) |
09812eb7 LP |
1179 | return -ENOMEM; |
1180 | our_env[n_env++] = x; | |
1181 | } | |
1182 | ||
7cae38c4 LP |
1183 | if (home) { |
1184 | x = strappend("HOME=", home); | |
1185 | if (!x) | |
1186 | return -ENOMEM; | |
1187 | our_env[n_env++] = x; | |
1188 | } | |
1189 | ||
1190 | if (username) { | |
1191 | x = strappend("LOGNAME=", username); | |
1192 | if (!x) | |
1193 | return -ENOMEM; | |
1194 | our_env[n_env++] = x; | |
1195 | ||
1196 | x = strappend("USER=", username); | |
1197 | if (!x) | |
1198 | return -ENOMEM; | |
1199 | our_env[n_env++] = x; | |
1200 | } | |
1201 | ||
1202 | if (shell) { | |
1203 | x = strappend("SHELL=", shell); | |
1204 | if (!x) | |
1205 | return -ENOMEM; | |
1206 | our_env[n_env++] = x; | |
1207 | } | |
1208 | ||
1209 | if (is_terminal_input(c->std_input) || | |
1210 | c->std_output == EXEC_OUTPUT_TTY || | |
1211 | c->std_error == EXEC_OUTPUT_TTY || | |
1212 | c->tty_path) { | |
1213 | ||
1214 | x = strdup(default_term_for_tty(tty_path(c))); | |
1215 | if (!x) | |
1216 | return -ENOMEM; | |
1217 | our_env[n_env++] = x; | |
1218 | } | |
1219 | ||
1220 | our_env[n_env++] = NULL; | |
09812eb7 | 1221 | assert(n_env <= 10); |
7cae38c4 LP |
1222 | |
1223 | *ret = our_env; | |
1224 | our_env = NULL; | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
d35fbf6b DM |
1229 | static int exec_child(ExecCommand *command, |
1230 | const ExecContext *context, | |
1231 | const ExecParameters *params, | |
1232 | ExecRuntime *runtime, | |
1233 | char **argv, | |
1234 | int socket_fd, | |
1235 | int *fds, unsigned n_fds, | |
1236 | char **files_env, | |
1237 | int *error) { | |
1238 | ||
1239 | _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL; | |
1240 | const char *username = NULL, *home = NULL, *shell = NULL; | |
1241 | unsigned n_dont_close = 0; | |
e44da745 | 1242 | int dont_close[n_fds + 4]; |
d35fbf6b DM |
1243 | uid_t uid = (uid_t) -1; |
1244 | gid_t gid = (gid_t) -1; | |
1245 | int i, err; | |
034c6ed7 | 1246 | |
5cb5a6ff LP |
1247 | assert(command); |
1248 | assert(context); | |
d35fbf6b DM |
1249 | assert(params); |
1250 | assert(error); | |
1251 | ||
1252 | rename_process_from_path(command->path); | |
1253 | ||
1254 | /* We reset exactly these signals, since they are the | |
1255 | * only ones we set to SIG_IGN in the main daemon. All | |
1256 | * others we leave untouched because we set them to | |
1257 | * SIG_DFL or a valid handler initially, both of which | |
1258 | * will be demoted to SIG_DFL. */ | |
1259 | default_signals(SIGNALS_CRASH_HANDLER, | |
1260 | SIGNALS_IGNORE, -1); | |
1261 | ||
1262 | if (context->ignore_sigpipe) | |
1263 | ignore_signals(SIGPIPE, -1); | |
1264 | ||
1265 | err = reset_signal_mask(); | |
1266 | if (err < 0) { | |
1267 | *error = EXIT_SIGNAL_MASK; | |
1268 | return err; | |
1269 | } | |
034c6ed7 | 1270 | |
d35fbf6b DM |
1271 | if (params->idle_pipe) |
1272 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 1273 | |
d35fbf6b DM |
1274 | /* Close sockets very early to make sure we don't |
1275 | * block init reexecution because it cannot bind its | |
1276 | * sockets */ | |
1277 | log_forget_fds(); | |
4f2d528d | 1278 | |
d35fbf6b DM |
1279 | if (socket_fd >= 0) |
1280 | dont_close[n_dont_close++] = socket_fd; | |
1281 | if (n_fds > 0) { | |
1282 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
1283 | n_dont_close += n_fds; | |
1284 | } | |
e44da745 DM |
1285 | if (params->bus_endpoint_fd >= 0) |
1286 | dont_close[n_dont_close++] = params->bus_endpoint_fd; | |
d35fbf6b DM |
1287 | if (runtime) { |
1288 | if (runtime->netns_storage_socket[0] >= 0) | |
1289 | dont_close[n_dont_close++] = runtime->netns_storage_socket[0]; | |
1290 | if (runtime->netns_storage_socket[1] >= 0) | |
1291 | dont_close[n_dont_close++] = runtime->netns_storage_socket[1]; | |
9fa95f85 | 1292 | } |
4f2d528d | 1293 | |
d35fbf6b DM |
1294 | err = close_all_fds(dont_close, n_dont_close); |
1295 | if (err < 0) { | |
1296 | *error = EXIT_FDS; | |
1297 | return err; | |
8c7be95e LP |
1298 | } |
1299 | ||
d35fbf6b DM |
1300 | if (!context->same_pgrp) |
1301 | if (setsid() < 0) { | |
1302 | *error = EXIT_SETSID; | |
1303 | return -errno; | |
1304 | } | |
9e2f7c11 | 1305 | |
d35fbf6b DM |
1306 | exec_context_tty_reset(context); |
1307 | ||
1308 | if (params->confirm_spawn) { | |
1309 | char response; | |
1310 | ||
1311 | err = ask_for_confirmation(&response, argv); | |
1312 | if (err == -ETIMEDOUT) | |
1313 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); | |
1314 | else if (err < 0) | |
1315 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-err)); | |
1316 | else if (response == 's') { | |
1317 | write_confirm_message("Skipping execution.\n"); | |
1318 | *error = EXIT_CONFIRM; | |
1319 | return -ECANCELED; | |
1320 | } else if (response == 'n') { | |
1321 | write_confirm_message("Failing execution.\n"); | |
1322 | *error = 0; | |
1323 | return 0; | |
1324 | } | |
1325 | } | |
1a63a750 | 1326 | |
d35fbf6b DM |
1327 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1328 | * must sure to drop O_NONBLOCK */ | |
1329 | if (socket_fd >= 0) | |
1330 | fd_nonblock(socket_fd, false); | |
acbb0225 | 1331 | |
d35fbf6b DM |
1332 | err = setup_input(context, socket_fd, params->apply_tty_stdin); |
1333 | if (err < 0) { | |
1334 | *error = EXIT_STDIN; | |
1335 | return err; | |
1336 | } | |
034c6ed7 | 1337 | |
d35fbf6b DM |
1338 | err = setup_output(context, STDOUT_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin); |
1339 | if (err < 0) { | |
1340 | *error = EXIT_STDOUT; | |
1341 | return err; | |
1342 | } | |
1343 | ||
1344 | err = setup_output(context, STDERR_FILENO, socket_fd, basename(command->path), params->unit_id, params->apply_tty_stdin); | |
1345 | if (err < 0) { | |
1346 | *error = EXIT_STDERR; | |
1347 | return err; | |
1348 | } | |
1349 | ||
1350 | if (params->cgroup_path) { | |
1351 | err = cg_attach_everywhere(params->cgroup_supported, params->cgroup_path, 0); | |
1b6d7fa7 | 1352 | if (err < 0) { |
d35fbf6b DM |
1353 | *error = EXIT_CGROUP; |
1354 | return err; | |
309bff19 | 1355 | } |
d35fbf6b | 1356 | } |
309bff19 | 1357 | |
d35fbf6b DM |
1358 | if (context->oom_score_adjust_set) { |
1359 | char t[16]; | |
f2b68789 | 1360 | |
d35fbf6b DM |
1361 | snprintf(t, sizeof(t), "%i", context->oom_score_adjust); |
1362 | char_array_0(t); | |
613b411c | 1363 | |
d35fbf6b DM |
1364 | if (write_string_file("/proc/self/oom_score_adj", t) < 0) { |
1365 | *error = EXIT_OOM_ADJUST; | |
1366 | return -errno; | |
613b411c | 1367 | } |
d35fbf6b DM |
1368 | } |
1369 | ||
1370 | if (context->nice_set) | |
1371 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
1372 | *error = EXIT_NICE; | |
1373 | return -errno; | |
613b411c LP |
1374 | } |
1375 | ||
d35fbf6b DM |
1376 | if (context->cpu_sched_set) { |
1377 | struct sched_param param = { | |
1378 | .sched_priority = context->cpu_sched_priority, | |
1379 | }; | |
1380 | ||
1381 | err = sched_setscheduler(0, | |
1382 | context->cpu_sched_policy | | |
1383 | (context->cpu_sched_reset_on_fork ? | |
1384 | SCHED_RESET_ON_FORK : 0), | |
1385 | ¶m); | |
4c2630eb | 1386 | if (err < 0) { |
d35fbf6b DM |
1387 | *error = EXIT_SETSCHEDULER; |
1388 | return -errno; | |
fc9b2a84 | 1389 | } |
d35fbf6b | 1390 | } |
fc9b2a84 | 1391 | |
d35fbf6b DM |
1392 | if (context->cpuset) |
1393 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
1394 | *error = EXIT_CPUAFFINITY; | |
1395 | return -errno; | |
034c6ed7 LP |
1396 | } |
1397 | ||
d35fbf6b DM |
1398 | if (context->ioprio_set) |
1399 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
1400 | *error = EXIT_IOPRIO; | |
1401 | return -errno; | |
1402 | } | |
da726a4d | 1403 | |
d35fbf6b DM |
1404 | if (context->timer_slack_nsec != NSEC_INFINITY) |
1405 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
1406 | *error = EXIT_TIMERSLACK; | |
1407 | return -errno; | |
4c2630eb | 1408 | } |
9eba9da4 | 1409 | |
d35fbf6b DM |
1410 | if (context->personality != 0xffffffffUL) |
1411 | if (personality(context->personality) < 0) { | |
1412 | *error = EXIT_PERSONALITY; | |
1413 | return -errno; | |
4c2630eb | 1414 | } |
94f04347 | 1415 | |
d35fbf6b DM |
1416 | if (context->utmp_id) |
1417 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path); | |
1418 | ||
1419 | if (context->user) { | |
1420 | username = context->user; | |
1421 | err = get_user_creds(&username, &uid, &gid, &home, &shell); | |
4c2630eb | 1422 | if (err < 0) { |
d35fbf6b DM |
1423 | *error = EXIT_USER; |
1424 | return err; | |
071830ff LP |
1425 | } |
1426 | ||
d35fbf6b DM |
1427 | if (is_terminal_input(context->std_input)) { |
1428 | err = chown_terminal(STDIN_FILENO, uid); | |
4c2630eb | 1429 | if (err < 0) { |
d35fbf6b DM |
1430 | *error = EXIT_STDIN; |
1431 | return err; | |
8e274523 | 1432 | } |
4c2630eb | 1433 | } |
d35fbf6b | 1434 | } |
8e274523 | 1435 | |
e44da745 DM |
1436 | #ifdef ENABLE_KDBUS |
1437 | if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) { | |
1438 | uid_t ep_uid = (uid == (uid_t) -1) ? 0 : uid; | |
1439 | ||
1440 | err = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint); | |
1441 | if (err < 0) { | |
1442 | *error = EXIT_BUS_ENDPOINT; | |
1443 | return err; | |
1444 | } | |
1445 | } | |
1446 | #endif | |
1447 | ||
a931ad47 LP |
1448 | /* If delegation is enabled we'll pass ownership of the cgroup |
1449 | * (but only in systemd's own controller hierarchy!) to the | |
1450 | * user of the new process. */ | |
1451 | if (params->cgroup_path && context->user && params->cgroup_delegate) { | |
d35fbf6b DM |
1452 | err = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid); |
1453 | if (err < 0) { | |
1454 | *error = EXIT_CGROUP; | |
1455 | return err; | |
1456 | } | |
034c6ed7 | 1457 | |
034c6ed7 | 1458 | |
d35fbf6b DM |
1459 | err = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0755, uid, gid); |
1460 | if (err < 0) { | |
1461 | *error = EXIT_CGROUP; | |
1462 | return err; | |
034c6ed7 | 1463 | } |
d35fbf6b | 1464 | } |
034c6ed7 | 1465 | |
d35fbf6b DM |
1466 | if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) { |
1467 | char **rt; | |
fb33a393 | 1468 | |
d35fbf6b DM |
1469 | STRV_FOREACH(rt, context->runtime_directory) { |
1470 | _cleanup_free_ char *p; | |
94f04347 | 1471 | |
d35fbf6b DM |
1472 | p = strjoin(params->runtime_prefix, "/", *rt, NULL); |
1473 | if (!p) { | |
1474 | *error = EXIT_RUNTIME_DIRECTORY; | |
1475 | return -ENOMEM; | |
94f04347 | 1476 | } |
94f04347 | 1477 | |
d35fbf6b DM |
1478 | err = mkdir_safe(p, context->runtime_directory_mode, uid, gid); |
1479 | if (err < 0) { | |
1480 | *error = EXIT_RUNTIME_DIRECTORY; | |
1481 | return err; | |
94f04347 | 1482 | } |
d35fbf6b DM |
1483 | } |
1484 | } | |
94f04347 | 1485 | |
d35fbf6b DM |
1486 | if (params->apply_permissions) { |
1487 | err = enforce_groups(context, username, gid); | |
1488 | if (err < 0) { | |
1489 | *error = EXIT_GROUP; | |
1490 | return err; | |
1491 | } | |
1492 | } | |
9eba9da4 | 1493 | |
d35fbf6b | 1494 | umask(context->umask); |
94f04347 | 1495 | |
d35fbf6b DM |
1496 | #ifdef HAVE_PAM |
1497 | if (params->apply_permissions && context->pam_name && username) { | |
1498 | err = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds); | |
1499 | if (err < 0) { | |
1500 | *error = EXIT_PAM; | |
1501 | return err; | |
1502 | } | |
1503 | } | |
1504 | #endif | |
ac45f971 | 1505 | |
d35fbf6b DM |
1506 | if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) { |
1507 | err = setup_netns(runtime->netns_storage_socket); | |
1508 | if (err < 0) { | |
1509 | *error = EXIT_NETWORK; | |
1510 | return err; | |
1511 | } | |
1512 | } | |
169c1bda | 1513 | |
d35fbf6b DM |
1514 | if (!strv_isempty(context->read_write_dirs) || |
1515 | !strv_isempty(context->read_only_dirs) || | |
1516 | !strv_isempty(context->inaccessible_dirs) || | |
1517 | context->mount_flags != 0 || | |
1518 | (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) || | |
e44da745 | 1519 | params->bus_endpoint_path || |
d35fbf6b DM |
1520 | context->private_devices || |
1521 | context->protect_system != PROTECT_SYSTEM_NO || | |
1522 | context->protect_home != PROTECT_HOME_NO) { | |
1523 | ||
1524 | char *tmp = NULL, *var = NULL; | |
1525 | ||
1526 | /* The runtime struct only contains the parent | |
1527 | * of the private /tmp, which is | |
1528 | * non-accessible to world users. Inside of it | |
1529 | * there's a /tmp that is sticky, and that's | |
1530 | * the one we want to use here. */ | |
1531 | ||
1532 | if (context->private_tmp && runtime) { | |
1533 | if (runtime->tmp_dir) | |
1534 | tmp = strappenda(runtime->tmp_dir, "/tmp"); | |
1535 | if (runtime->var_tmp_dir) | |
1536 | var = strappenda(runtime->var_tmp_dir, "/tmp"); | |
1537 | } | |
d8b4e2e9 | 1538 | |
d35fbf6b DM |
1539 | err = setup_namespace( |
1540 | context->read_write_dirs, | |
1541 | context->read_only_dirs, | |
1542 | context->inaccessible_dirs, | |
1543 | tmp, | |
1544 | var, | |
e44da745 | 1545 | params->bus_endpoint_path, |
d35fbf6b DM |
1546 | context->private_devices, |
1547 | context->protect_home, | |
1548 | context->protect_system, | |
1549 | context->mount_flags); | |
0015ebf3 MS |
1550 | |
1551 | if (err == -EPERM) | |
79008bdd | 1552 | log_unit_warning(params->unit_id, "Failed to set up file system namespace due to lack of privileges. Execution sandbox will not be in effect: %s", strerror(-err)); |
0015ebf3 | 1553 | else if (err < 0) { |
d35fbf6b DM |
1554 | *error = EXIT_NAMESPACE; |
1555 | return err; | |
81a2b7ce | 1556 | } |
d35fbf6b | 1557 | } |
81a2b7ce | 1558 | |
d35fbf6b DM |
1559 | if (params->apply_chroot) { |
1560 | if (context->root_directory) | |
1561 | if (chroot(context->root_directory) < 0) { | |
1562 | *error = EXIT_CHROOT; | |
1563 | return -errno; | |
8aa75193 LP |
1564 | } |
1565 | ||
d35fbf6b DM |
1566 | if (chdir(context->working_directory ? context->working_directory : "/") < 0) { |
1567 | *error = EXIT_CHDIR; | |
1568 | return -errno; | |
1569 | } | |
1570 | } else { | |
1571 | _cleanup_free_ char *d = NULL; | |
8aa75193 | 1572 | |
d35fbf6b DM |
1573 | if (asprintf(&d, "%s/%s", |
1574 | context->root_directory ? context->root_directory : "", | |
1575 | context->working_directory ? context->working_directory : "") < 0) { | |
1576 | *error = EXIT_MEMORY; | |
1577 | return -ENOMEM; | |
8aa75193 | 1578 | } |
8aa75193 | 1579 | |
d35fbf6b DM |
1580 | if (chdir(d) < 0) { |
1581 | *error = EXIT_CHDIR; | |
1582 | return -errno; | |
1583 | } | |
1584 | } | |
e66cf1a3 | 1585 | |
d35fbf6b DM |
1586 | /* We repeat the fd closing here, to make sure that |
1587 | * nothing is leaked from the PAM modules. Note that | |
1588 | * we are more aggressive this time since socket_fd | |
e44da745 DM |
1589 | * and the netns fds we don't need anymore. The custom |
1590 | * endpoint fd was needed to upload the policy and can | |
1591 | * now be closed as well. */ | |
d35fbf6b DM |
1592 | err = close_all_fds(fds, n_fds); |
1593 | if (err >= 0) | |
1594 | err = shift_fds(fds, n_fds); | |
1595 | if (err >= 0) | |
1596 | err = flags_fds(fds, n_fds, context->non_blocking); | |
1597 | if (err < 0) { | |
1598 | *error = EXIT_FDS; | |
1599 | return err; | |
1600 | } | |
e66cf1a3 | 1601 | |
d35fbf6b | 1602 | if (params->apply_permissions) { |
e66cf1a3 | 1603 | |
d35fbf6b DM |
1604 | for (i = 0; i < _RLIMIT_MAX; i++) { |
1605 | if (!context->rlimit[i]) | |
1606 | continue; | |
1607 | ||
1608 | if (setrlimit_closest(i, context->rlimit[i]) < 0) { | |
1609 | *error = EXIT_LIMITS; | |
1610 | return -errno; | |
e66cf1a3 LP |
1611 | } |
1612 | } | |
1613 | ||
d35fbf6b DM |
1614 | if (context->capability_bounding_set_drop) { |
1615 | err = capability_bounding_set_drop(context->capability_bounding_set_drop, false); | |
4c2630eb | 1616 | if (err < 0) { |
d35fbf6b DM |
1617 | *error = EXIT_CAPABILITIES; |
1618 | return err; | |
3b8bddde | 1619 | } |
4c2630eb | 1620 | } |
3b8bddde | 1621 | |
2ca620c4 WC |
1622 | #ifdef HAVE_SMACK |
1623 | if (context->smack_process_label) { | |
1624 | err = mac_smack_apply_pid(0, context->smack_process_label); | |
1625 | if (err < 0) { | |
1626 | *error = EXIT_SMACK_PROCESS_LABEL; | |
1627 | return err; | |
1628 | } | |
1629 | } | |
1630 | #endif | |
1631 | ||
d35fbf6b DM |
1632 | if (context->user) { |
1633 | err = enforce_user(context, uid); | |
4c2630eb | 1634 | if (err < 0) { |
d35fbf6b DM |
1635 | *error = EXIT_USER; |
1636 | return err; | |
5b6319dc LP |
1637 | } |
1638 | } | |
d35fbf6b DM |
1639 | |
1640 | /* PR_GET_SECUREBITS is not privileged, while | |
1641 | * PR_SET_SECUREBITS is. So to suppress | |
1642 | * potential EPERMs we'll try not to call | |
1643 | * PR_SET_SECUREBITS unless necessary. */ | |
1644 | if (prctl(PR_GET_SECUREBITS) != context->secure_bits) | |
1645 | if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) { | |
1646 | *error = EXIT_SECUREBITS; | |
1647 | return -errno; | |
ff01d048 | 1648 | } |
5b6319dc | 1649 | |
d35fbf6b DM |
1650 | if (context->capabilities) |
1651 | if (cap_set_proc(context->capabilities) < 0) { | |
1652 | *error = EXIT_CAPABILITIES; | |
1653 | return -errno; | |
613b411c LP |
1654 | } |
1655 | ||
d35fbf6b DM |
1656 | if (context->no_new_privileges) |
1657 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { | |
1658 | *error = EXIT_NO_NEW_PRIVILEGES; | |
1659 | return -errno; | |
1660 | } | |
1661 | ||
1662 | #ifdef HAVE_SECCOMP | |
1663 | if (context->address_families_whitelist || | |
1664 | !set_isempty(context->address_families)) { | |
1665 | err = apply_address_families(context); | |
4c2630eb | 1666 | if (err < 0) { |
d35fbf6b DM |
1667 | *error = EXIT_ADDRESS_FAMILIES; |
1668 | return err; | |
4c2630eb MS |
1669 | } |
1670 | } | |
04aa0cb9 | 1671 | |
d35fbf6b DM |
1672 | if (context->syscall_whitelist || |
1673 | !set_isempty(context->syscall_filter) || | |
1674 | !set_isempty(context->syscall_archs)) { | |
1675 | err = apply_seccomp(context); | |
1676 | if (err < 0) { | |
1677 | *error = EXIT_SECCOMP; | |
1678 | return err; | |
81a2b7ce | 1679 | } |
d35fbf6b DM |
1680 | } |
1681 | #endif | |
81a2b7ce | 1682 | |
d35fbf6b | 1683 | #ifdef HAVE_SELINUX |
6baa7db0 | 1684 | if (mac_selinux_use()) { |
16115b0a MS |
1685 | if (context->selinux_context) { |
1686 | err = setexeccon(context->selinux_context); | |
1687 | if (err < 0 && !context->selinux_context_ignore) { | |
1688 | *error = EXIT_SELINUX_CONTEXT; | |
1689 | return err; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | if (params->selinux_context_net && socket_fd >= 0) { | |
1694 | _cleanup_free_ char *label = NULL; | |
1695 | ||
cc56fafe | 1696 | err = mac_selinux_get_child_mls_label(socket_fd, command->path, &label); |
16115b0a MS |
1697 | if (err < 0) { |
1698 | *error = EXIT_SELINUX_CONTEXT; | |
1699 | return err; | |
1700 | } | |
1701 | ||
1702 | err = setexeccon(label); | |
1703 | if (err < 0) { | |
1704 | *error = EXIT_SELINUX_CONTEXT; | |
1705 | return err; | |
1706 | } | |
81a2b7ce | 1707 | } |
81a2b7ce | 1708 | } |
d35fbf6b | 1709 | #endif |
81a2b7ce | 1710 | |
d35fbf6b | 1711 | #ifdef HAVE_APPARMOR |
6baa7db0 | 1712 | if (context->apparmor_profile && mac_apparmor_use()) { |
d35fbf6b DM |
1713 | err = aa_change_onexec(context->apparmor_profile); |
1714 | if (err < 0 && !context->apparmor_profile_ignore) { | |
1715 | *error = EXIT_APPARMOR_PROFILE; | |
5482192e | 1716 | return -errno; |
d35fbf6b | 1717 | } |
034c6ed7 | 1718 | } |
d35fbf6b DM |
1719 | #endif |
1720 | } | |
034c6ed7 | 1721 | |
d35fbf6b DM |
1722 | err = build_environment(context, n_fds, params->watchdog_usec, home, username, shell, &our_env); |
1723 | if (err < 0) { | |
1724 | *error = EXIT_MEMORY; | |
1725 | return err; | |
1726 | } | |
034c6ed7 | 1727 | |
d35fbf6b DM |
1728 | final_env = strv_env_merge(5, |
1729 | params->environment, | |
1730 | our_env, | |
1731 | context->environment, | |
1732 | files_env, | |
1733 | pam_env, | |
1734 | NULL); | |
1735 | if (!final_env) { | |
1736 | *error = EXIT_MEMORY; | |
1737 | return -ENOMEM; | |
1738 | } | |
81a2b7ce | 1739 | |
d35fbf6b DM |
1740 | final_argv = replace_env_argv(argv, final_env); |
1741 | if (!final_argv) { | |
1742 | *error = EXIT_MEMORY; | |
1743 | return -ENOMEM; | |
1744 | } | |
034c6ed7 | 1745 | |
d35fbf6b | 1746 | final_env = strv_env_clean(final_env); |
260abb78 | 1747 | |
d35fbf6b DM |
1748 | if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) { |
1749 | _cleanup_free_ char *line; | |
81a2b7ce | 1750 | |
d35fbf6b DM |
1751 | line = exec_command_line(final_argv); |
1752 | if (line) { | |
1753 | log_open(); | |
79008bdd | 1754 | log_unit_struct(LOG_DEBUG, |
d35fbf6b DM |
1755 | params->unit_id, |
1756 | "EXECUTABLE=%s", command->path, | |
1757 | "MESSAGE=Executing: %s", line, | |
1758 | NULL); | |
1759 | log_close(); | |
1760 | } | |
1761 | } | |
1762 | execve(command->path, final_argv, final_env); | |
1763 | *error = EXIT_EXEC; | |
1764 | return -errno; | |
1765 | } | |
81a2b7ce | 1766 | |
d35fbf6b DM |
1767 | int exec_spawn(ExecCommand *command, |
1768 | const ExecContext *context, | |
1769 | const ExecParameters *params, | |
1770 | ExecRuntime *runtime, | |
1771 | pid_t *ret) { | |
8351ceae | 1772 | |
d35fbf6b DM |
1773 | _cleanup_strv_free_ char **files_env = NULL; |
1774 | int *fds = NULL; unsigned n_fds = 0; | |
1775 | char *line, **argv; | |
1776 | int socket_fd; | |
1777 | pid_t pid; | |
1778 | int err; | |
8351ceae | 1779 | |
d35fbf6b DM |
1780 | assert(command); |
1781 | assert(context); | |
1782 | assert(ret); | |
1783 | assert(params); | |
1784 | assert(params->fds || params->n_fds <= 0); | |
4298d0b5 | 1785 | |
d35fbf6b DM |
1786 | if (context->std_input == EXEC_INPUT_SOCKET || |
1787 | context->std_output == EXEC_OUTPUT_SOCKET || | |
1788 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 1789 | |
d35fbf6b DM |
1790 | if (params->n_fds != 1) |
1791 | return -EINVAL; | |
eef65bf3 | 1792 | |
d35fbf6b DM |
1793 | socket_fd = params->fds[0]; |
1794 | } else { | |
1795 | socket_fd = -1; | |
1796 | fds = params->fds; | |
1797 | n_fds = params->n_fds; | |
1798 | } | |
94f04347 | 1799 | |
7491ccf2 | 1800 | err = exec_context_load_environment(context, params->unit_id, &files_env); |
d35fbf6b | 1801 | if (err < 0) { |
79008bdd | 1802 | log_unit_struct(LOG_ERR, |
d35fbf6b DM |
1803 | params->unit_id, |
1804 | "MESSAGE=Failed to load environment files: %s", strerror(-err), | |
1805 | "ERRNO=%d", -err, | |
1806 | NULL); | |
1807 | return err; | |
1808 | } | |
034c6ed7 | 1809 | |
d35fbf6b | 1810 | argv = params->argv ?: command->argv; |
034c6ed7 | 1811 | |
d35fbf6b DM |
1812 | line = exec_command_line(argv); |
1813 | if (!line) | |
1814 | return log_oom(); | |
fab56fc5 | 1815 | |
79008bdd | 1816 | log_unit_struct(LOG_DEBUG, |
d35fbf6b DM |
1817 | params->unit_id, |
1818 | "EXECUTABLE=%s", command->path, | |
1819 | "MESSAGE=About to execute: %s", line, | |
1820 | NULL); | |
1821 | free(line); | |
1822 | ||
1823 | pid = fork(); | |
1824 | if (pid < 0) | |
1825 | return -errno; | |
1826 | ||
1827 | if (pid == 0) { | |
1828 | int r; | |
034c6ed7 | 1829 | |
d35fbf6b DM |
1830 | err = exec_child(command, |
1831 | context, | |
1832 | params, | |
1833 | runtime, | |
1834 | argv, | |
1835 | socket_fd, | |
1836 | fds, n_fds, | |
1837 | files_env, | |
1838 | &r); | |
4c2630eb MS |
1839 | if (r != 0) { |
1840 | log_open(); | |
23635a85 ZJS |
1841 | log_struct(LOG_ERR, MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), |
1842 | "EXECUTABLE=%s", command->path, | |
1843 | "MESSAGE=Failed at step %s spawning %s: %s", | |
1844 | exit_status_to_string(r, EXIT_STATUS_SYSTEMD), | |
1845 | command->path, strerror(-err), | |
1846 | "ERRNO=%d", -err, | |
1847 | NULL); | |
1848 | log_close(); | |
4c2630eb MS |
1849 | } |
1850 | ||
034c6ed7 LP |
1851 | _exit(r); |
1852 | } | |
1853 | ||
79008bdd | 1854 | log_unit_struct(LOG_DEBUG, |
d35fbf6b | 1855 | params->unit_id, |
ccd06097 ZJS |
1856 | "MESSAGE=Forked %s as "PID_FMT, |
1857 | command->path, pid, | |
e62d8c39 | 1858 | NULL); |
23635a85 | 1859 | |
80876c20 LP |
1860 | /* We add the new process to the cgroup both in the child (so |
1861 | * that we can be sure that no user code is ever executed | |
1862 | * outside of the cgroup) and in the parent (so that we can be | |
1863 | * sure that when we kill the cgroup the process will be | |
1864 | * killed too). */ | |
d35fbf6b DM |
1865 | if (params->cgroup_path) |
1866 | cg_attach(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, pid); | |
2da3263a | 1867 | |
b58b4116 | 1868 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 1869 | |
034c6ed7 | 1870 | *ret = pid; |
5cb5a6ff LP |
1871 | return 0; |
1872 | } | |
1873 | ||
034c6ed7 LP |
1874 | void exec_context_init(ExecContext *c) { |
1875 | assert(c); | |
1876 | ||
4c12626c | 1877 | c->umask = 0022; |
9eba9da4 | 1878 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 1879 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 1880 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 1881 | c->syslog_level_prefix = true; |
353e12c2 | 1882 | c->ignore_sigpipe = true; |
3a43da28 | 1883 | c->timer_slack_nsec = NSEC_INFINITY; |
ac45f971 | 1884 | c->personality = 0xffffffffUL; |
e66cf1a3 | 1885 | c->runtime_directory_mode = 0755; |
034c6ed7 LP |
1886 | } |
1887 | ||
613b411c | 1888 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
1889 | unsigned l; |
1890 | ||
1891 | assert(c); | |
1892 | ||
1893 | strv_free(c->environment); | |
034c6ed7 | 1894 | c->environment = NULL; |
5cb5a6ff | 1895 | |
8c7be95e LP |
1896 | strv_free(c->environment_files); |
1897 | c->environment_files = NULL; | |
1898 | ||
034c6ed7 | 1899 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) { |
5cb5a6ff | 1900 | free(c->rlimit[l]); |
034c6ed7 LP |
1901 | c->rlimit[l] = NULL; |
1902 | } | |
1903 | ||
9eba9da4 LP |
1904 | free(c->working_directory); |
1905 | c->working_directory = NULL; | |
1906 | free(c->root_directory); | |
1907 | c->root_directory = NULL; | |
5cb5a6ff | 1908 | |
80876c20 LP |
1909 | free(c->tty_path); |
1910 | c->tty_path = NULL; | |
1911 | ||
071830ff LP |
1912 | free(c->syslog_identifier); |
1913 | c->syslog_identifier = NULL; | |
1914 | ||
5cb5a6ff | 1915 | free(c->user); |
034c6ed7 LP |
1916 | c->user = NULL; |
1917 | ||
5cb5a6ff | 1918 | free(c->group); |
034c6ed7 LP |
1919 | c->group = NULL; |
1920 | ||
1921 | strv_free(c->supplementary_groups); | |
1922 | c->supplementary_groups = NULL; | |
94f04347 | 1923 | |
5b6319dc LP |
1924 | free(c->pam_name); |
1925 | c->pam_name = NULL; | |
1926 | ||
94f04347 LP |
1927 | if (c->capabilities) { |
1928 | cap_free(c->capabilities); | |
1929 | c->capabilities = NULL; | |
1930 | } | |
15ae422b LP |
1931 | |
1932 | strv_free(c->read_only_dirs); | |
1933 | c->read_only_dirs = NULL; | |
1934 | ||
1935 | strv_free(c->read_write_dirs); | |
1936 | c->read_write_dirs = NULL; | |
1937 | ||
1938 | strv_free(c->inaccessible_dirs); | |
1939 | c->inaccessible_dirs = NULL; | |
82c121a4 LP |
1940 | |
1941 | if (c->cpuset) | |
1942 | CPU_FREE(c->cpuset); | |
86a3475b LP |
1943 | |
1944 | free(c->utmp_id); | |
1945 | c->utmp_id = NULL; | |
b9a0e010 | 1946 | |
7b52a628 MS |
1947 | free(c->selinux_context); |
1948 | c->selinux_context = NULL; | |
1949 | ||
eef65bf3 MS |
1950 | free(c->apparmor_profile); |
1951 | c->apparmor_profile = NULL; | |
1952 | ||
17df7223 LP |
1953 | set_free(c->syscall_filter); |
1954 | c->syscall_filter = NULL; | |
57183d11 LP |
1955 | |
1956 | set_free(c->syscall_archs); | |
1957 | c->syscall_archs = NULL; | |
4298d0b5 LP |
1958 | |
1959 | set_free(c->address_families); | |
1960 | c->address_families = NULL; | |
e66cf1a3 LP |
1961 | |
1962 | strv_free(c->runtime_directory); | |
1963 | c->runtime_directory = NULL; | |
bb7dd0b0 DM |
1964 | |
1965 | bus_endpoint_free(c->bus_endpoint); | |
1966 | c->bus_endpoint = NULL; | |
e66cf1a3 LP |
1967 | } |
1968 | ||
1969 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_prefix) { | |
1970 | char **i; | |
1971 | ||
1972 | assert(c); | |
1973 | ||
1974 | if (!runtime_prefix) | |
1975 | return 0; | |
1976 | ||
1977 | STRV_FOREACH(i, c->runtime_directory) { | |
1978 | _cleanup_free_ char *p; | |
1979 | ||
1980 | p = strjoin(runtime_prefix, "/", *i, NULL); | |
1981 | if (!p) | |
1982 | return -ENOMEM; | |
1983 | ||
1984 | /* We execute this synchronously, since we need to be | |
1985 | * sure this is gone when we start the service | |
1986 | * next. */ | |
1987 | rm_rf_dangerous(p, false, true, false); | |
1988 | } | |
1989 | ||
1990 | return 0; | |
5cb5a6ff LP |
1991 | } |
1992 | ||
43d0fcbd LP |
1993 | void exec_command_done(ExecCommand *c) { |
1994 | assert(c); | |
1995 | ||
1996 | free(c->path); | |
1997 | c->path = NULL; | |
1998 | ||
1999 | strv_free(c->argv); | |
2000 | c->argv = NULL; | |
2001 | } | |
2002 | ||
2003 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
2004 | unsigned i; | |
2005 | ||
2006 | for (i = 0; i < n; i++) | |
2007 | exec_command_done(c+i); | |
2008 | } | |
2009 | ||
5cb5a6ff LP |
2010 | void exec_command_free_list(ExecCommand *c) { |
2011 | ExecCommand *i; | |
2012 | ||
2013 | while ((i = c)) { | |
71fda00f | 2014 | LIST_REMOVE(command, c, i); |
43d0fcbd | 2015 | exec_command_done(i); |
5cb5a6ff LP |
2016 | free(i); |
2017 | } | |
2018 | } | |
2019 | ||
034c6ed7 LP |
2020 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
2021 | unsigned i; | |
2022 | ||
2023 | for (i = 0; i < n; i++) { | |
2024 | exec_command_free_list(c[i]); | |
2025 | c[i] = NULL; | |
2026 | } | |
2027 | } | |
2028 | ||
7491ccf2 | 2029 | int exec_context_load_environment(const ExecContext *c, const char *unit_id, char ***l) { |
8c7be95e LP |
2030 | char **i, **r = NULL; |
2031 | ||
2032 | assert(c); | |
2033 | assert(l); | |
2034 | ||
2035 | STRV_FOREACH(i, c->environment_files) { | |
2036 | char *fn; | |
2037 | int k; | |
2038 | bool ignore = false; | |
2039 | char **p; | |
7fd1b19b | 2040 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 2041 | int count, n; |
8c7be95e LP |
2042 | |
2043 | fn = *i; | |
2044 | ||
2045 | if (fn[0] == '-') { | |
2046 | ignore = true; | |
2047 | fn ++; | |
2048 | } | |
2049 | ||
2050 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
2051 | if (ignore) |
2052 | continue; | |
2053 | ||
2054 | strv_free(r); | |
2055 | return -EINVAL; | |
2056 | } | |
2057 | ||
2bef10ab | 2058 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
2059 | errno = 0; |
2060 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
2061 | if (ignore) |
2062 | continue; | |
8c7be95e | 2063 | |
2bef10ab PL |
2064 | strv_free(r); |
2065 | return errno ? -errno : -EINVAL; | |
2066 | } | |
2067 | count = pglob.gl_pathc; | |
2068 | if (count == 0) { | |
8c7be95e LP |
2069 | if (ignore) |
2070 | continue; | |
2071 | ||
2072 | strv_free(r); | |
2bef10ab | 2073 | return -EINVAL; |
8c7be95e | 2074 | } |
2bef10ab | 2075 | for (n = 0; n < count; n++) { |
717603e3 | 2076 | k = load_env_file(NULL, pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
2077 | if (k < 0) { |
2078 | if (ignore) | |
2079 | continue; | |
8c7be95e | 2080 | |
2bef10ab | 2081 | strv_free(r); |
2bef10ab | 2082 | return k; |
e9c1ea9d | 2083 | } |
ebc05a09 | 2084 | /* Log invalid environment variables with filename */ |
e9c1ea9d | 2085 | if (p) |
7491ccf2 | 2086 | p = strv_env_clean_log(p, unit_id, pglob.gl_pathv[n]); |
8c7be95e | 2087 | |
2bef10ab PL |
2088 | if (r == NULL) |
2089 | r = p; | |
2090 | else { | |
2091 | char **m; | |
8c7be95e | 2092 | |
2bef10ab PL |
2093 | m = strv_env_merge(2, r, p); |
2094 | strv_free(r); | |
2095 | strv_free(p); | |
c84a9488 | 2096 | if (!m) |
2bef10ab | 2097 | return -ENOMEM; |
2bef10ab PL |
2098 | |
2099 | r = m; | |
2100 | } | |
8c7be95e LP |
2101 | } |
2102 | } | |
2103 | ||
2104 | *l = r; | |
2105 | ||
2106 | return 0; | |
2107 | } | |
2108 | ||
6ac8fdc9 | 2109 | static bool tty_may_match_dev_console(const char *tty) { |
e1d75803 RC |
2110 | _cleanup_free_ char *active = NULL; |
2111 | char *console; | |
6ac8fdc9 MS |
2112 | |
2113 | if (startswith(tty, "/dev/")) | |
2114 | tty += 5; | |
2115 | ||
2116 | /* trivial identity? */ | |
2117 | if (streq(tty, "console")) | |
2118 | return true; | |
2119 | ||
2120 | console = resolve_dev_console(&active); | |
2121 | /* if we could not resolve, assume it may */ | |
2122 | if (!console) | |
2123 | return true; | |
2124 | ||
2125 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
e1d75803 | 2126 | return streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
2127 | } |
2128 | ||
2129 | bool exec_context_may_touch_console(ExecContext *ec) { | |
2130 | return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate || | |
2131 | is_terminal_input(ec->std_input) || | |
2132 | is_terminal_output(ec->std_output) || | |
2133 | is_terminal_output(ec->std_error)) && | |
2134 | tty_may_match_dev_console(tty_path(ec)); | |
2135 | } | |
2136 | ||
15ae422b LP |
2137 | static void strv_fprintf(FILE *f, char **l) { |
2138 | char **g; | |
2139 | ||
2140 | assert(f); | |
2141 | ||
2142 | STRV_FOREACH(g, l) | |
2143 | fprintf(f, " %s", *g); | |
2144 | } | |
2145 | ||
5cb5a6ff | 2146 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
507f22bd | 2147 | char **e; |
94f04347 | 2148 | unsigned i; |
9eba9da4 | 2149 | |
5cb5a6ff LP |
2150 | assert(c); |
2151 | assert(f); | |
2152 | ||
4ad49000 | 2153 | prefix = strempty(prefix); |
5cb5a6ff LP |
2154 | |
2155 | fprintf(f, | |
94f04347 LP |
2156 | "%sUMask: %04o\n" |
2157 | "%sWorkingDirectory: %s\n" | |
451a074f | 2158 | "%sRootDirectory: %s\n" |
15ae422b | 2159 | "%sNonBlocking: %s\n" |
64747e2d | 2160 | "%sPrivateTmp: %s\n" |
4819ff03 | 2161 | "%sPrivateNetwork: %s\n" |
7f112f50 | 2162 | "%sPrivateDevices: %s\n" |
1b8689f9 LP |
2163 | "%sProtectHome: %s\n" |
2164 | "%sProtectSystem: %s\n" | |
3bb07b76 | 2165 | "%sIgnoreSIGPIPE: %s\n", |
5cb5a6ff | 2166 | prefix, c->umask, |
9eba9da4 | 2167 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 2168 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 2169 | prefix, yes_no(c->non_blocking), |
64747e2d | 2170 | prefix, yes_no(c->private_tmp), |
4819ff03 | 2171 | prefix, yes_no(c->private_network), |
7f112f50 | 2172 | prefix, yes_no(c->private_devices), |
1b8689f9 LP |
2173 | prefix, protect_home_to_string(c->protect_home), |
2174 | prefix, protect_system_to_string(c->protect_system), | |
3bb07b76 | 2175 | prefix, yes_no(c->ignore_sigpipe)); |
fb33a393 | 2176 | |
8c7be95e LP |
2177 | STRV_FOREACH(e, c->environment) |
2178 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
2179 | ||
2180 | STRV_FOREACH(e, c->environment_files) | |
2181 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 2182 | |
fb33a393 LP |
2183 | if (c->nice_set) |
2184 | fprintf(f, | |
2185 | "%sNice: %i\n", | |
2186 | prefix, c->nice); | |
2187 | ||
dd6c17b1 | 2188 | if (c->oom_score_adjust_set) |
fb33a393 | 2189 | fprintf(f, |
dd6c17b1 LP |
2190 | "%sOOMScoreAdjust: %i\n", |
2191 | prefix, c->oom_score_adjust); | |
9eba9da4 | 2192 | |
94f04347 LP |
2193 | for (i = 0; i < RLIM_NLIMITS; i++) |
2194 | if (c->rlimit[i]) | |
de0671ee ZJS |
2195 | fprintf(f, "%s%s: "RLIM_FMT"\n", |
2196 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); | |
94f04347 | 2197 | |
f8b69d1d | 2198 | if (c->ioprio_set) { |
1756a011 | 2199 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 2200 | |
1756a011 | 2201 | ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); |
9eba9da4 LP |
2202 | fprintf(f, |
2203 | "%sIOSchedulingClass: %s\n" | |
2204 | "%sIOPriority: %i\n", | |
f8b69d1d | 2205 | prefix, strna(class_str), |
9eba9da4 | 2206 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d | 2207 | } |
94f04347 | 2208 | |
f8b69d1d | 2209 | if (c->cpu_sched_set) { |
1756a011 | 2210 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 2211 | |
1756a011 | 2212 | sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
94f04347 LP |
2213 | fprintf(f, |
2214 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
2215 | "%sCPUSchedulingPriority: %i\n" |
2216 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 2217 | prefix, strna(policy_str), |
38b48754 LP |
2218 | prefix, c->cpu_sched_priority, |
2219 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 2220 | } |
94f04347 | 2221 | |
82c121a4 | 2222 | if (c->cpuset) { |
94f04347 | 2223 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
2224 | for (i = 0; i < c->cpuset_ncpus; i++) |
2225 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
43a99a7a | 2226 | fprintf(f, " %u", i); |
94f04347 LP |
2227 | fputs("\n", f); |
2228 | } | |
2229 | ||
3a43da28 | 2230 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 2231 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
2232 | |
2233 | fprintf(f, | |
80876c20 LP |
2234 | "%sStandardInput: %s\n" |
2235 | "%sStandardOutput: %s\n" | |
2236 | "%sStandardError: %s\n", | |
2237 | prefix, exec_input_to_string(c->std_input), | |
2238 | prefix, exec_output_to_string(c->std_output), | |
2239 | prefix, exec_output_to_string(c->std_error)); | |
2240 | ||
2241 | if (c->tty_path) | |
2242 | fprintf(f, | |
6ea832a2 LP |
2243 | "%sTTYPath: %s\n" |
2244 | "%sTTYReset: %s\n" | |
2245 | "%sTTYVHangup: %s\n" | |
2246 | "%sTTYVTDisallocate: %s\n", | |
2247 | prefix, c->tty_path, | |
2248 | prefix, yes_no(c->tty_reset), | |
2249 | prefix, yes_no(c->tty_vhangup), | |
2250 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 2251 | |
5ce70e5b ZJS |
2252 | if (c->std_output == EXEC_OUTPUT_SYSLOG || |
2253 | c->std_output == EXEC_OUTPUT_KMSG || | |
2254 | c->std_output == EXEC_OUTPUT_JOURNAL || | |
2255 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2256 | c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2257 | c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
2258 | c->std_error == EXEC_OUTPUT_SYSLOG || | |
2259 | c->std_error == EXEC_OUTPUT_KMSG || | |
2260 | c->std_error == EXEC_OUTPUT_JOURNAL || | |
2261 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
2262 | c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
2263 | c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { | |
f8b69d1d | 2264 | |
5ce70e5b | 2265 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 2266 | |
5ce70e5b ZJS |
2267 | log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
2268 | log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
f8b69d1d | 2269 | |
94f04347 LP |
2270 | fprintf(f, |
2271 | "%sSyslogFacility: %s\n" | |
2272 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
2273 | prefix, strna(fac_str), |
2274 | prefix, strna(lvl_str)); | |
f8b69d1d | 2275 | } |
94f04347 LP |
2276 | |
2277 | if (c->capabilities) { | |
5ce70e5b ZJS |
2278 | _cleanup_cap_free_charp_ char *t; |
2279 | ||
2280 | t = cap_to_text(c->capabilities, NULL); | |
2281 | if (t) | |
2282 | fprintf(f, "%sCapabilities: %s\n", prefix, t); | |
94f04347 LP |
2283 | } |
2284 | ||
2285 | if (c->secure_bits) | |
2286 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
2287 | prefix, | |
cbb21cca ZJS |
2288 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
2289 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
2290 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
2291 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
2292 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
2293 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 LP |
2294 | |
2295 | if (c->capability_bounding_set_drop) { | |
ae556c21 | 2296 | unsigned long l; |
260abb78 | 2297 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2298 | |
64685e0c | 2299 | for (l = 0; l <= cap_last_cap(); l++) |
ae556c21 | 2300 | if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) { |
5ce70e5b | 2301 | _cleanup_cap_free_charp_ char *t; |
94f04347 | 2302 | |
5ce70e5b ZJS |
2303 | t = cap_to_name(l); |
2304 | if (t) | |
94f04347 | 2305 | fprintf(f, " %s", t); |
94f04347 LP |
2306 | } |
2307 | ||
2308 | fputs("\n", f); | |
2309 | } | |
2310 | ||
2311 | if (c->user) | |
f2d3769a | 2312 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2313 | if (c->group) |
f2d3769a | 2314 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2315 | |
15ae422b | 2316 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2317 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2318 | strv_fprintf(f, c->supplementary_groups); |
2319 | fputs("\n", f); | |
2320 | } | |
94f04347 | 2321 | |
5b6319dc | 2322 | if (c->pam_name) |
f2d3769a | 2323 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2324 | |
15ae422b LP |
2325 | if (strv_length(c->read_write_dirs) > 0) { |
2326 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2327 | strv_fprintf(f, c->read_write_dirs); | |
2328 | fputs("\n", f); | |
2329 | } | |
2330 | ||
2331 | if (strv_length(c->read_only_dirs) > 0) { | |
2332 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2333 | strv_fprintf(f, c->read_only_dirs); | |
2334 | fputs("\n", f); | |
2335 | } | |
94f04347 | 2336 | |
15ae422b LP |
2337 | if (strv_length(c->inaccessible_dirs) > 0) { |
2338 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2339 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2340 | fputs("\n", f); |
2341 | } | |
2e22afe9 | 2342 | |
169c1bda LP |
2343 | if (c->utmp_id) |
2344 | fprintf(f, | |
2345 | "%sUtmpIdentifier: %s\n", | |
2346 | prefix, c->utmp_id); | |
7b52a628 MS |
2347 | |
2348 | if (c->selinux_context) | |
2349 | fprintf(f, | |
5f8640fb LP |
2350 | "%sSELinuxContext: %s%s\n", |
2351 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 2352 | |
ac45f971 LP |
2353 | if (c->personality != 0xffffffffUL) |
2354 | fprintf(f, | |
2355 | "%sPersonality: %s\n", | |
2356 | prefix, strna(personality_to_string(c->personality))); | |
2357 | ||
17df7223 | 2358 | if (c->syscall_filter) { |
351a19b1 | 2359 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2360 | Iterator j; |
2361 | void *id; | |
2362 | bool first = true; | |
351a19b1 | 2363 | #endif |
17df7223 LP |
2364 | |
2365 | fprintf(f, | |
57183d11 | 2366 | "%sSystemCallFilter: ", |
17df7223 LP |
2367 | prefix); |
2368 | ||
2369 | if (!c->syscall_whitelist) | |
2370 | fputc('~', f); | |
2371 | ||
351a19b1 | 2372 | #ifdef HAVE_SECCOMP |
17df7223 LP |
2373 | SET_FOREACH(id, c->syscall_filter, j) { |
2374 | _cleanup_free_ char *name = NULL; | |
2375 | ||
2376 | if (first) | |
2377 | first = false; | |
2378 | else | |
2379 | fputc(' ', f); | |
2380 | ||
57183d11 | 2381 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 LP |
2382 | fputs(strna(name), f); |
2383 | } | |
351a19b1 | 2384 | #endif |
17df7223 LP |
2385 | |
2386 | fputc('\n', f); | |
2387 | } | |
2388 | ||
57183d11 LP |
2389 | if (c->syscall_archs) { |
2390 | #ifdef HAVE_SECCOMP | |
2391 | Iterator j; | |
2392 | void *id; | |
2393 | #endif | |
2394 | ||
2395 | fprintf(f, | |
2396 | "%sSystemCallArchitectures:", | |
2397 | prefix); | |
2398 | ||
2399 | #ifdef HAVE_SECCOMP | |
2400 | SET_FOREACH(id, c->syscall_archs, j) | |
2401 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); | |
2402 | #endif | |
2403 | fputc('\n', f); | |
2404 | } | |
2405 | ||
17df7223 LP |
2406 | if (c->syscall_errno != 0) |
2407 | fprintf(f, | |
2408 | "%sSystemCallErrorNumber: %s\n", | |
2409 | prefix, strna(errno_to_name(c->syscall_errno))); | |
eef65bf3 MS |
2410 | |
2411 | if (c->apparmor_profile) | |
2412 | fprintf(f, | |
2413 | "%sAppArmorProfile: %s%s\n", | |
2414 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
5cb5a6ff LP |
2415 | } |
2416 | ||
a931ad47 LP |
2417 | bool exec_context_maintains_privileges(ExecContext *c) { |
2418 | assert(c); | |
2419 | ||
2420 | /* Returns true if the process forked off would run run under | |
2421 | * an unchanged UID or as root. */ | |
2422 | ||
2423 | if (!c->user) | |
2424 | return true; | |
2425 | ||
2426 | if (streq(c->user, "root") || streq(c->user, "0")) | |
2427 | return true; | |
2428 | ||
2429 | return false; | |
2430 | } | |
2431 | ||
b58b4116 | 2432 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2433 | assert(s); |
5cb5a6ff | 2434 | |
b58b4116 LP |
2435 | zero(*s); |
2436 | s->pid = pid; | |
2437 | dual_timestamp_get(&s->start_timestamp); | |
2438 | } | |
2439 | ||
6ea832a2 | 2440 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2441 | assert(s); |
2442 | ||
0b1f4ae6 | 2443 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2444 | zero(*s); |
2445 | ||
034c6ed7 | 2446 | s->pid = pid; |
63983207 | 2447 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2448 | |
034c6ed7 LP |
2449 | s->code = code; |
2450 | s->status = status; | |
169c1bda | 2451 | |
6ea832a2 LP |
2452 | if (context) { |
2453 | if (context->utmp_id) | |
2454 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2455 | ||
2456 | exec_context_tty_reset(context); | |
2457 | } | |
9fb86720 LP |
2458 | } |
2459 | ||
2460 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2461 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2462 | ||
2463 | assert(s); | |
2464 | assert(f); | |
2465 | ||
9fb86720 LP |
2466 | if (s->pid <= 0) |
2467 | return; | |
2468 | ||
4c940960 LP |
2469 | prefix = strempty(prefix); |
2470 | ||
9fb86720 | 2471 | fprintf(f, |
ccd06097 ZJS |
2472 | "%sPID: "PID_FMT"\n", |
2473 | prefix, s->pid); | |
9fb86720 | 2474 | |
63983207 | 2475 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2476 | fprintf(f, |
2477 | "%sStart Timestamp: %s\n", | |
63983207 | 2478 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2479 | |
63983207 | 2480 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2481 | fprintf(f, |
2482 | "%sExit Timestamp: %s\n" | |
2483 | "%sExit Code: %s\n" | |
2484 | "%sExit Status: %i\n", | |
63983207 | 2485 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2486 | prefix, sigchld_code_to_string(s->code), |
2487 | prefix, s->status); | |
5cb5a6ff | 2488 | } |
44d8db9e | 2489 | |
9e2f7c11 | 2490 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2491 | size_t k; |
2492 | char *n, *p, **a; | |
2493 | bool first = true; | |
2494 | ||
9e2f7c11 | 2495 | assert(argv); |
44d8db9e | 2496 | |
9164977d | 2497 | k = 1; |
9e2f7c11 | 2498 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2499 | k += strlen(*a)+3; |
2500 | ||
2501 | if (!(n = new(char, k))) | |
2502 | return NULL; | |
2503 | ||
2504 | p = n; | |
9e2f7c11 | 2505 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2506 | |
2507 | if (!first) | |
2508 | *(p++) = ' '; | |
2509 | else | |
2510 | first = false; | |
2511 | ||
2512 | if (strpbrk(*a, WHITESPACE)) { | |
2513 | *(p++) = '\''; | |
2514 | p = stpcpy(p, *a); | |
2515 | *(p++) = '\''; | |
2516 | } else | |
2517 | p = stpcpy(p, *a); | |
2518 | ||
2519 | } | |
2520 | ||
9164977d LP |
2521 | *p = 0; |
2522 | ||
44d8db9e LP |
2523 | /* FIXME: this doesn't really handle arguments that have |
2524 | * spaces and ticks in them */ | |
2525 | ||
2526 | return n; | |
2527 | } | |
2528 | ||
2529 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
e1d75803 | 2530 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 2531 | const char *prefix2; |
44d8db9e LP |
2532 | |
2533 | assert(c); | |
2534 | assert(f); | |
2535 | ||
4c940960 LP |
2536 | prefix = strempty(prefix); |
2537 | prefix2 = strappenda(prefix, "\t"); | |
44d8db9e | 2538 | |
9e2f7c11 | 2539 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2540 | fprintf(f, |
2541 | "%sCommand Line: %s\n", | |
2542 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2543 | ||
9fb86720 | 2544 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
2545 | } |
2546 | ||
2547 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2548 | assert(f); | |
2549 | ||
4c940960 | 2550 | prefix = strempty(prefix); |
44d8db9e LP |
2551 | |
2552 | LIST_FOREACH(command, c, c) | |
2553 | exec_command_dump(c, f, prefix); | |
2554 | } | |
94f04347 | 2555 | |
a6a80b4f LP |
2556 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2557 | ExecCommand *end; | |
2558 | ||
2559 | assert(l); | |
2560 | assert(e); | |
2561 | ||
2562 | if (*l) { | |
35b8ca3a | 2563 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2564 | LIST_FIND_TAIL(command, *l, end); |
2565 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2566 | } else |
2567 | *l = e; | |
2568 | } | |
2569 | ||
26fd040d LP |
2570 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2571 | va_list ap; | |
2572 | char **l, *p; | |
2573 | ||
2574 | assert(c); | |
2575 | assert(path); | |
2576 | ||
2577 | va_start(ap, path); | |
2578 | l = strv_new_ap(path, ap); | |
2579 | va_end(ap); | |
2580 | ||
2581 | if (!l) | |
2582 | return -ENOMEM; | |
2583 | ||
250a918d LP |
2584 | p = strdup(path); |
2585 | if (!p) { | |
26fd040d LP |
2586 | strv_free(l); |
2587 | return -ENOMEM; | |
2588 | } | |
2589 | ||
2590 | free(c->path); | |
2591 | c->path = p; | |
2592 | ||
2593 | strv_free(c->argv); | |
2594 | c->argv = l; | |
2595 | ||
2596 | return 0; | |
2597 | } | |
2598 | ||
86b23b07 | 2599 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 2600 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 2601 | va_list ap; |
86b23b07 JS |
2602 | int r; |
2603 | ||
2604 | assert(c); | |
2605 | assert(path); | |
2606 | ||
2607 | va_start(ap, path); | |
2608 | l = strv_new_ap(path, ap); | |
2609 | va_end(ap); | |
2610 | ||
2611 | if (!l) | |
2612 | return -ENOMEM; | |
2613 | ||
2614 | r = strv_extend_strv(&c->argv, l); | |
e63ff941 | 2615 | if (r < 0) |
86b23b07 | 2616 | return r; |
86b23b07 JS |
2617 | |
2618 | return 0; | |
2619 | } | |
2620 | ||
2621 | ||
613b411c LP |
2622 | static int exec_runtime_allocate(ExecRuntime **rt) { |
2623 | ||
2624 | if (*rt) | |
2625 | return 0; | |
2626 | ||
2627 | *rt = new0(ExecRuntime, 1); | |
f146f5e1 | 2628 | if (!*rt) |
613b411c LP |
2629 | return -ENOMEM; |
2630 | ||
2631 | (*rt)->n_ref = 1; | |
2632 | (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1; | |
2633 | ||
2634 | return 0; | |
2635 | } | |
2636 | ||
2637 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) { | |
2638 | int r; | |
2639 | ||
2640 | assert(rt); | |
2641 | assert(c); | |
2642 | assert(id); | |
2643 | ||
2644 | if (*rt) | |
2645 | return 1; | |
2646 | ||
2647 | if (!c->private_network && !c->private_tmp) | |
2648 | return 0; | |
2649 | ||
2650 | r = exec_runtime_allocate(rt); | |
2651 | if (r < 0) | |
2652 | return r; | |
2653 | ||
2654 | if (c->private_network && (*rt)->netns_storage_socket[0] < 0) { | |
2655 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0) | |
2656 | return -errno; | |
2657 | } | |
2658 | ||
2659 | if (c->private_tmp && !(*rt)->tmp_dir) { | |
2660 | r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir); | |
2661 | if (r < 0) | |
2662 | return r; | |
2663 | } | |
2664 | ||
2665 | return 1; | |
2666 | } | |
2667 | ||
2668 | ExecRuntime *exec_runtime_ref(ExecRuntime *r) { | |
2669 | assert(r); | |
2670 | assert(r->n_ref > 0); | |
2671 | ||
2672 | r->n_ref++; | |
2673 | return r; | |
2674 | } | |
2675 | ||
2676 | ExecRuntime *exec_runtime_unref(ExecRuntime *r) { | |
2677 | ||
2678 | if (!r) | |
2679 | return NULL; | |
2680 | ||
2681 | assert(r->n_ref > 0); | |
2682 | ||
2683 | r->n_ref--; | |
2684 | if (r->n_ref <= 0) { | |
2685 | free(r->tmp_dir); | |
2686 | free(r->var_tmp_dir); | |
3d94f76c | 2687 | safe_close_pair(r->netns_storage_socket); |
613b411c LP |
2688 | free(r); |
2689 | } | |
2690 | ||
2691 | return NULL; | |
2692 | } | |
2693 | ||
2694 | int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds) { | |
2695 | assert(u); | |
2696 | assert(f); | |
2697 | assert(fds); | |
2698 | ||
2699 | if (!rt) | |
2700 | return 0; | |
2701 | ||
2702 | if (rt->tmp_dir) | |
2703 | unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir); | |
2704 | ||
2705 | if (rt->var_tmp_dir) | |
2706 | unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir); | |
2707 | ||
2708 | if (rt->netns_storage_socket[0] >= 0) { | |
2709 | int copy; | |
2710 | ||
2711 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); | |
2712 | if (copy < 0) | |
2713 | return copy; | |
2714 | ||
2715 | unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy); | |
2716 | } | |
2717 | ||
2718 | if (rt->netns_storage_socket[1] >= 0) { | |
2719 | int copy; | |
2720 | ||
2721 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); | |
2722 | if (copy < 0) | |
2723 | return copy; | |
2724 | ||
2725 | unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy); | |
2726 | } | |
2727 | ||
2728 | return 0; | |
2729 | } | |
2730 | ||
2731 | int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds) { | |
2732 | int r; | |
2733 | ||
2734 | assert(rt); | |
2735 | assert(key); | |
2736 | assert(value); | |
2737 | ||
2738 | if (streq(key, "tmp-dir")) { | |
2739 | char *copy; | |
2740 | ||
2741 | r = exec_runtime_allocate(rt); | |
2742 | if (r < 0) | |
2743 | return r; | |
2744 | ||
2745 | copy = strdup(value); | |
2746 | if (!copy) | |
2747 | return log_oom(); | |
2748 | ||
2749 | free((*rt)->tmp_dir); | |
2750 | (*rt)->tmp_dir = copy; | |
2751 | ||
2752 | } else if (streq(key, "var-tmp-dir")) { | |
2753 | char *copy; | |
2754 | ||
2755 | r = exec_runtime_allocate(rt); | |
2756 | if (r < 0) | |
2757 | return r; | |
2758 | ||
2759 | copy = strdup(value); | |
2760 | if (!copy) | |
2761 | return log_oom(); | |
2762 | ||
2763 | free((*rt)->var_tmp_dir); | |
2764 | (*rt)->var_tmp_dir = copy; | |
2765 | ||
2766 | } else if (streq(key, "netns-socket-0")) { | |
2767 | int fd; | |
2768 | ||
2769 | r = exec_runtime_allocate(rt); | |
2770 | if (r < 0) | |
2771 | return r; | |
2772 | ||
2773 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2774 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2775 | else { |
03e334a1 | 2776 | safe_close((*rt)->netns_storage_socket[0]); |
613b411c LP |
2777 | (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd); |
2778 | } | |
2779 | } else if (streq(key, "netns-socket-1")) { | |
2780 | int fd; | |
2781 | ||
2782 | r = exec_runtime_allocate(rt); | |
2783 | if (r < 0) | |
2784 | return r; | |
2785 | ||
2786 | if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd)) | |
79008bdd | 2787 | log_unit_debug(u->id, "Failed to parse netns socket value %s", value); |
613b411c | 2788 | else { |
03e334a1 | 2789 | safe_close((*rt)->netns_storage_socket[1]); |
613b411c LP |
2790 | (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd); |
2791 | } | |
2792 | } else | |
2793 | return 0; | |
2794 | ||
2795 | return 1; | |
2796 | } | |
2797 | ||
2798 | static void *remove_tmpdir_thread(void *p) { | |
2799 | _cleanup_free_ char *path = p; | |
2800 | ||
2801 | rm_rf_dangerous(path, false, true, false); | |
2802 | return NULL; | |
2803 | } | |
2804 | ||
2805 | void exec_runtime_destroy(ExecRuntime *rt) { | |
98b47d54 LP |
2806 | int r; |
2807 | ||
613b411c LP |
2808 | if (!rt) |
2809 | return; | |
2810 | ||
2811 | /* If there are multiple users of this, let's leave the stuff around */ | |
2812 | if (rt->n_ref > 1) | |
2813 | return; | |
2814 | ||
2815 | if (rt->tmp_dir) { | |
2816 | log_debug("Spawning thread to nuke %s", rt->tmp_dir); | |
98b47d54 LP |
2817 | |
2818 | r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir); | |
2819 | if (r < 0) { | |
2820 | log_warning("Failed to nuke %s: %s", rt->tmp_dir, strerror(-r)); | |
2821 | free(rt->tmp_dir); | |
2822 | } | |
2823 | ||
613b411c LP |
2824 | rt->tmp_dir = NULL; |
2825 | } | |
2826 | ||
2827 | if (rt->var_tmp_dir) { | |
2828 | log_debug("Spawning thread to nuke %s", rt->var_tmp_dir); | |
98b47d54 LP |
2829 | |
2830 | r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir); | |
2831 | if (r < 0) { | |
2832 | log_warning("Failed to nuke %s: %s", rt->var_tmp_dir, strerror(-r)); | |
2833 | free(rt->var_tmp_dir); | |
2834 | } | |
2835 | ||
613b411c LP |
2836 | rt->var_tmp_dir = NULL; |
2837 | } | |
2838 | ||
3d94f76c | 2839 | safe_close_pair(rt->netns_storage_socket); |
613b411c LP |
2840 | } |
2841 | ||
80876c20 LP |
2842 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
2843 | [EXEC_INPUT_NULL] = "null", | |
2844 | [EXEC_INPUT_TTY] = "tty", | |
2845 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
2846 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
2847 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
2848 | }; |
2849 | ||
8a0867d6 LP |
2850 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
2851 | ||
94f04347 | 2852 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 2853 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 2854 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 2855 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 2856 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 2857 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 2858 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 2859 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
2860 | [EXEC_OUTPUT_JOURNAL] = "journal", |
2861 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 2862 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
2863 | }; |
2864 | ||
2865 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); |