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selinux: explicitly relabel /run/initramfs/root-fsck and friends
[thirdparty/systemd.git] / src / execute.c
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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
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
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
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
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>
5cb5a6ff 40
5b6319dc
LP		 41#ifdef HAVE_PAM
42#include <security/pam_appl.h>
43#endif
44
5cb5a6ff
LP		 45#include "execute.h"
46#include "strv.h"
47#include "macro.h"
48#include "util.h"
acbb0225 49#include "log.h"
9eba9da4 50#include "ioprio.h"
94f04347 51#include "securebits.h"
8e274523 52#include "cgroup.h"
15ae422b 53#include "namespace.h"
df1f0afe 54#include "tcpwrap.h"
d06dacd0 55#include "exit-status.h"
dd6c17b1 56#include "missing.h"
169c1bda 57#include "utmp-wtmp.h"
f6a6225e 58#include "def.h"
ff01d048 59#include "loopback-setup.h"
5cb5a6ff 60
02a51aba
LP		 61/* This assumes there is a 'tty' group */
62#define TTY_MODE 0620
63
034c6ed7
LP		 64static int shift_fds(int fds[], unsigned n_fds) {
65 int start, restart_from;
66
67 if (n_fds <= 0)
68 return 0;
69
a0d40ac5
LP		 70 /* Modifies the fds array! (sorts it) */
71
034c6ed7
LP		 72 assert(fds);
73
74 start = 0;
75 for (;;) {
76 int i;
77
78 restart_from = -1;
79
80 for (i = start; i < (int) n_fds; i++) {
81 int nfd;
82
83 /* Already at right index? */
84 if (fds[i] == i+3)
85 continue;
86
87 if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0)
88 return -errno;
89
e1f5e051 90 close_nointr_nofail(fds[i]);
034c6ed7
LP		 91 fds[i] = nfd;
92
93 /* Hmm, the fd we wanted isn't free? Then
94 * let's remember that and try again from here*/
95 if (nfd != i+3 && restart_from < 0)
96 restart_from = i;
97 }
98
99 if (restart_from < 0)
100 break;
101
102 start = restart_from;
103 }
104
105 return 0;
106}
107
c2748801 108static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) {
47a71eed 109 unsigned i;
e2c76839 110 int r;
47a71eed
LP		 111
112 if (n_fds <= 0)
113 return 0;
114
115 assert(fds);
116
451a074f 117 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
47a71eed
LP		 118
119 for (i = 0; i < n_fds; i++) {
47a71eed 120
e2c76839
LP		 121 if ((r = fd_nonblock(fds[i], nonblock)) < 0)
122 return r;
47a71eed 123
451a074f
LP		 124 /* We unconditionally drop FD_CLOEXEC from the fds,
125 * since after all we want to pass these fds to our
126 * children */
47a71eed 127
e2c76839
LP		 128 if ((r = fd_cloexec(fds[i], false)) < 0)
129 return r;
47a71eed
LP		 130 }
131
132 return 0;
133}
134
80876c20
LP		 135static const char *tty_path(const ExecContext *context) {
136 assert(context);
137
138 if (context->tty_path)
139 return context->tty_path;
140
141 return "/dev/console";
142}
143
6ea832a2
LP		 144void exec_context_tty_reset(const ExecContext *context) {
145 assert(context);
146
147 if (context->tty_vhangup)
148 terminal_vhangup(tty_path(context));
149
150 if (context->tty_reset)
151 reset_terminal(tty_path(context));
152
153 if (context->tty_vt_disallocate && context->tty_path)
154 vt_disallocate(context->tty_path);
155}
156
80876c20
LP		 157static int open_null_as(int flags, int nfd) {
158 int fd, r;
071830ff 159
80876c20 160 assert(nfd >= 0);
071830ff 161
80876c20 162 if ((fd = open("/dev/null", flags|O_NOCTTY)) < 0)
071830ff
LP		 163 return -errno;
164
80876c20
LP		 165 if (fd != nfd) {
166 r = dup2(fd, nfd) < 0 ? -errno : nfd;
e1f5e051 167 close_nointr_nofail(fd);
80876c20
LP		 168 } else
169 r = nfd;
071830ff 170
80876c20 171 return r;
071830ff
LP		 172}
173
80876c20
LP		 174static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, int nfd) {
175 int fd, r;
176 union {
177 struct sockaddr sa;
178 struct sockaddr_un un;
179 } sa;
071830ff
LP		 180
181 assert(context);
80876c20
LP		 182 assert(output < _EXEC_OUTPUT_MAX);
183 assert(ident);
184 assert(nfd >= 0);
071830ff 185
80876c20
LP		 186 if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
187 return -errno;
071830ff 188
80876c20
LP		 189 zero(sa);
190 sa.sa.sa_family = AF_UNIX;
91b22f21 191 strncpy(sa.un.sun_path, LOGGER_SOCKET, sizeof(sa.un.sun_path));
071830ff 192
91b22f21 193 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + sizeof(LOGGER_SOCKET) - 1) < 0) {
80876c20
LP		 194 close_nointr_nofail(fd);
195 return -errno;
196 }
071830ff 197
80876c20
LP		 198 if (shutdown(fd, SHUT_RD) < 0) {
199 close_nointr_nofail(fd);
200 return -errno;
201 }
071830ff 202
80876c20
LP		 203 /* We speak a very simple protocol between log server
204 * and client: one line for the log destination (kmsg
205 * or syslog), followed by the priority field,
206 * followed by the process name. Since we replaced
207 * stdin/stderr we simple use stdio to write to
208 * it. Note that we use stderr, to minimize buffer
209 * flushing issues. */
210
211 dprintf(fd,
212 "%s\n"
213 "%i\n"
4f4a1dbf
LP		 214 "%s\n"
215 "%i\n",
28dbc1e8
LP		 216 output == EXEC_OUTPUT_KMSG ? "kmsg" :
217 output == EXEC_OUTPUT_KMSG_AND_CONSOLE ? "kmsg+console" :
218 output == EXEC_OUTPUT_SYSLOG ? "syslog" :
219 "syslog+console",
80876c20 220 context->syslog_priority,
4f4a1dbf 221 context->syslog_identifier ? context->syslog_identifier : ident,
74922904 222 context->syslog_level_prefix);
80876c20
LP		 223
224 if (fd != nfd) {
225 r = dup2(fd, nfd) < 0 ? -errno : nfd;
e1f5e051 226 close_nointr_nofail(fd);
80876c20
LP		 227 } else
228 r = nfd;
071830ff 229
80876c20
LP		 230 return r;
231}
232static int open_terminal_as(const char *path, mode_t mode, int nfd) {
233 int fd, r;
071830ff 234
80876c20
LP		 235 assert(path);
236 assert(nfd >= 0);
071830ff 237
80876c20
LP		 238 if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0)
239 return fd;
071830ff 240
80876c20
LP		 241 if (fd != nfd) {
242 r = dup2(fd, nfd) < 0 ? -errno : nfd;
243 close_nointr_nofail(fd);
244 } else
245 r = nfd;
071830ff 246
80876c20
LP		 247 return r;
248}
071830ff 249
80876c20
LP		 250static bool is_terminal_input(ExecInput i) {
251 return
252 i == EXEC_INPUT_TTY ||
253 i == EXEC_INPUT_TTY_FORCE ||
254 i == EXEC_INPUT_TTY_FAIL;
255}
071830ff 256
1e3ad081
LP		 257static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) {
258
259 if (is_terminal_input(std_input) && !apply_tty_stdin)
260 return EXEC_INPUT_NULL;
071830ff 261
03fd9c49 262 if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0)
4f2d528d
LP		 263 return EXEC_INPUT_NULL;
264
03fd9c49 265 return std_input;
4f2d528d
LP		 266}
267
03fd9c49 268static int fixup_output(ExecOutput std_output, int socket_fd) {
4f2d528d 269
03fd9c49 270 if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0)
4f2d528d
LP		 271 return EXEC_OUTPUT_INHERIT;
272
03fd9c49 273 return std_output;
4f2d528d
LP		 274}
275
1e3ad081 276static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) {
4f2d528d
LP		 277 ExecInput i;
278
279 assert(context);
280
1e3ad081 281 i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
4f2d528d
LP		 282
283 switch (i) {
071830ff 284
80876c20
LP		 285 case EXEC_INPUT_NULL:
286 return open_null_as(O_RDONLY, STDIN_FILENO);
287
288 case EXEC_INPUT_TTY:
289 case EXEC_INPUT_TTY_FORCE:
290 case EXEC_INPUT_TTY_FAIL: {
291 int fd, r;
071830ff 292
80876c20
LP		 293 if ((fd = acquire_terminal(
294 tty_path(context),
4f2d528d 295 i == EXEC_INPUT_TTY_FAIL,
21de3988
LP		 296 i == EXEC_INPUT_TTY_FORCE,
297 false)) < 0)
80876c20
LP		 298 return fd;
299
300 if (fd != STDIN_FILENO) {
301 r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
071830ff 302 close_nointr_nofail(fd);
80876c20
LP		 303 } else
304 r = STDIN_FILENO;
305
306 return r;
307 }
308
4f2d528d
LP		 309 case EXEC_INPUT_SOCKET:
310 return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
311
80876c20
LP		 312 default:
313 assert_not_reached("Unknown input type");
314 }
315}
316
1e3ad081 317static int setup_output(const ExecContext *context, int socket_fd, const char *ident, bool apply_tty_stdin) {
4f2d528d
LP		 318 ExecOutput o;
319 ExecInput i;
320
80876c20
LP		 321 assert(context);
322 assert(ident);
323
1e3ad081 324 i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
03fd9c49 325 o = fixup_output(context->std_output, socket_fd);
4f2d528d 326
80876c20
LP		 327 /* This expects the input is already set up */
328
4f2d528d 329 switch (o) {
071830ff 330
80876c20
LP		 331 case EXEC_OUTPUT_INHERIT:
332
21d21ea4
LP		 333 /* If input got downgraded, inherit the original value */
334 if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input))
335 return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
336
acb591e4 337 /* If the input is connected to anything that's not a /dev/null, inherit that... */
ff876e28 338 if (i != EXEC_INPUT_NULL)
80876c20 339 return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
071830ff 340
acb591e4
LP		 341 /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */
342 if (getppid() != 1)
343 return STDOUT_FILENO;
ff876e28 344
acb591e4
LP		 345 /* We need to open /dev/null here anew, to get the
346 * right access mode. So we fall through */
80876c20
LP		 347
348 case EXEC_OUTPUT_NULL:
349 return open_null_as(O_WRONLY, STDOUT_FILENO);
350
4f2d528d
LP		 351 case EXEC_OUTPUT_TTY:
352 if (is_terminal_input(i))
80876c20
LP		 353 return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
354
355 /* We don't reset the terminal if this is just about output */
356 return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
94f04347 357
80876c20 358 case EXEC_OUTPUT_SYSLOG:
28dbc1e8 359 case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
9a6bca7a 360 case EXEC_OUTPUT_KMSG:
28dbc1e8 361 case EXEC_OUTPUT_KMSG_AND_CONSOLE:
4f2d528d
LP		 362 return connect_logger_as(context, o, ident, STDOUT_FILENO);
363
364 case EXEC_OUTPUT_SOCKET:
365 assert(socket_fd >= 0);
366 return dup2(socket_fd, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
80876c20 367
94f04347
LP		 368 default:
369 assert_not_reached("Unknown output type");
071830ff 370 }
94f04347
LP		 371}
372
1e3ad081 373static int setup_error(const ExecContext *context, int socket_fd, const char *ident, bool apply_tty_stdin) {
4f2d528d
LP		 374 ExecOutput o, e;
375 ExecInput i;
376
94f04347 377 assert(context);
02a51aba 378 assert(ident);
071830ff 379
1e3ad081 380 i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
03fd9c49
LP		 381 o = fixup_output(context->std_output, socket_fd);
382 e = fixup_output(context->std_error, socket_fd);
4f2d528d 383
80876c20 384 /* This expects the input and output are already set up */
94f04347 385
80876c20
LP		 386 /* Don't change the stderr file descriptor if we inherit all
387 * the way and are not on a tty */
4f2d528d
LP		 388 if (e == EXEC_OUTPUT_INHERIT &&
389 o == EXEC_OUTPUT_INHERIT &&
acb591e4 390 i == EXEC_INPUT_NULL &&
21d21ea4 391 !is_terminal_input(context->std_input) &&
dec5d552 392 getppid () != 1)
80876c20 393 return STDERR_FILENO;
94f04347 394
21d21ea4 395 /* Duplicate from stdout if possible */
4f2d528d 396 if (e == o || e == EXEC_OUTPUT_INHERIT)
80876c20 397 return dup2(STDOUT_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
94f04347 398
4f2d528d 399 switch (e) {
80876c20
LP		 400
401 case EXEC_OUTPUT_NULL:
402 return open_null_as(O_WRONLY, STDERR_FILENO);
403
404 case EXEC_OUTPUT_TTY:
4f2d528d 405 if (is_terminal_input(i))
80876c20
LP		 406 return dup2(STDIN_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
407
408 /* We don't reset the terminal if this is just about output */
409 return open_terminal_as(tty_path(context), O_WRONLY, STDERR_FILENO);
410
411 case EXEC_OUTPUT_SYSLOG:
28dbc1e8 412 case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
9a6bca7a 413 case EXEC_OUTPUT_KMSG:
28dbc1e8 414 case EXEC_OUTPUT_KMSG_AND_CONSOLE:
4f2d528d
LP		 415 return connect_logger_as(context, e, ident, STDERR_FILENO);
416
417 case EXEC_OUTPUT_SOCKET:
418 assert(socket_fd >= 0);
419 return dup2(socket_fd, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
94f04347
LP		 420
421 default:
80876c20 422 assert_not_reached("Unknown error type");
94f04347 423 }
071830ff
LP		 424}
425
02a51aba
LP		 426static int chown_terminal(int fd, uid_t uid) {
427 struct stat st;
428
429 assert(fd >= 0);
02a51aba
LP		 430
431 /* This might fail. What matters are the results. */
bab45044
LP		 432 (void) fchown(fd, uid, -1);
433 (void) fchmod(fd, TTY_MODE);
02a51aba
LP		 434
435 if (fstat(fd, &st) < 0)
436 return -errno;
437
d8b4e2e9 438 if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE)
02a51aba
LP		 439 return -EPERM;
440
441 return 0;
442}
443
80876c20
LP		 444static int setup_confirm_stdio(const ExecContext *context,
445 int *_saved_stdin,
446 int *_saved_stdout) {
447 int fd = -1, saved_stdin, saved_stdout = -1, r;
448
449 assert(context);
450 assert(_saved_stdin);
451 assert(_saved_stdout);
452
453 /* This returns positive EXIT_xxx return values instead of
454 * negative errno style values! */
455
456 if ((saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3)) < 0)
457 return EXIT_STDIN;
458
459 if ((saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3)) < 0) {
460 r = EXIT_STDOUT;
461 goto fail;
462 }
463
464 if ((fd = acquire_terminal(
465 tty_path(context),
466 context->std_input == EXEC_INPUT_TTY_FAIL,
21de3988
LP		 467 context->std_input == EXEC_INPUT_TTY_FORCE,
468 false)) < 0) {
80876c20
LP		 469 r = EXIT_STDIN;
470 goto fail;
471 }
472
02a51aba
LP		 473 if (chown_terminal(fd, getuid()) < 0) {
474 r = EXIT_STDIN;
475 goto fail;
476 }
477
80876c20
LP		 478 if (dup2(fd, STDIN_FILENO) < 0) {
479 r = EXIT_STDIN;
480 goto fail;
481 }
482
483 if (dup2(fd, STDOUT_FILENO) < 0) {
484 r = EXIT_STDOUT;
485 goto fail;
486 }
487
488 if (fd >= 2)
489 close_nointr_nofail(fd);
490
491 *_saved_stdin = saved_stdin;
492 *_saved_stdout = saved_stdout;
493
494 return 0;
495
496fail:
497 if (saved_stdout >= 0)
498 close_nointr_nofail(saved_stdout);
499
500 if (saved_stdin >= 0)
501 close_nointr_nofail(saved_stdin);
502
503 if (fd >= 0)
504 close_nointr_nofail(fd);
505
506 return r;
507}
508
2608882f 509static int restore_confirm_stdio(const ExecContext *context,
80876c20
LP		 510 int *saved_stdin,
511 int *saved_stdout,
512 bool *keep_stdin,
513 bool *keep_stdout) {
514
515 assert(context);
516 assert(saved_stdin);
517 assert(*saved_stdin >= 0);
518 assert(saved_stdout);
519 assert(*saved_stdout >= 0);
520
521 /* This returns positive EXIT_xxx return values instead of
522 * negative errno style values! */
523
524 if (is_terminal_input(context->std_input)) {
525
526 /* The service wants terminal input. */
527
528 *keep_stdin = true;
529 *keep_stdout =
530 context->std_output == EXEC_OUTPUT_INHERIT ||
531 context->std_output == EXEC_OUTPUT_TTY;
532
533 } else {
534 /* If the service doesn't want a controlling terminal,
535 * then we need to get rid entirely of what we have
536 * already. */
537
538 if (release_terminal() < 0)
539 return EXIT_STDIN;
540
541 if (dup2(*saved_stdin, STDIN_FILENO) < 0)
542 return EXIT_STDIN;
543
544 if (dup2(*saved_stdout, STDOUT_FILENO) < 0)
545 return EXIT_STDOUT;
546
547 *keep_stdout = *keep_stdin = false;
548 }
549
550 return 0;
551}
552
81a2b7ce
LP		 553static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) {
554 bool keep_groups = false;
555 int r;
556
557 assert(context);
558
35b8ca3a 559 /* Lookup and set GID and supplementary group list. Here too
81a2b7ce
LP		 560 * we avoid NSS lookups for gid=0. */
561
562 if (context->group || username) {
563
4b67834e
LP		 564 if (context->group) {
565 const char *g = context->group;
566
567 if ((r = get_group_creds(&g, &gid)) < 0)
81a2b7ce 568 return r;
4b67834e 569 }
81a2b7ce
LP		 570
571 /* First step, initialize groups from /etc/groups */
572 if (username && gid != 0) {
573 if (initgroups(username, gid) < 0)
574 return -errno;
575
576 keep_groups = true;
577 }
578
579 /* Second step, set our gids */
580 if (setresgid(gid, gid, gid) < 0)
581 return -errno;
582 }
583
584 if (context->supplementary_groups) {
585 int ngroups_max, k;
586 gid_t *gids;
587 char **i;
588
589 /* Final step, initialize any manually set supplementary groups */
da19d5c1 590 assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0);
81a2b7ce
LP		 591
592 if (!(gids = new(gid_t, ngroups_max)))
593 return -ENOMEM;
594
595 if (keep_groups) {
596 if ((k = getgroups(ngroups_max, gids)) < 0) {
597 free(gids);
598 return -errno;
599 }
600 } else
601 k = 0;
602
603 STRV_FOREACH(i, context->supplementary_groups) {
4b67834e 604 const char *g;
81a2b7ce
LP		 605
606 if (k >= ngroups_max) {
607 free(gids);
608 return -E2BIG;
609 }
610
4b67834e
LP		 611 g = *i;
612 r = get_group_creds(&g, gids+k);
613 if (r < 0) {
81a2b7ce
LP		 614 free(gids);
615 return r;
616 }
617
618 k++;
619 }
620
621 if (setgroups(k, gids) < 0) {
622 free(gids);
623 return -errno;
624 }
625
626 free(gids);
627 }
628
629 return 0;
630}
631
632static int enforce_user(const ExecContext *context, uid_t uid) {
633 int r;
634 assert(context);
635
636 /* Sets (but doesn't lookup) the uid and make sure we keep the
637 * capabilities while doing so. */
638
639 if (context->capabilities) {
640 cap_t d;
641 static const cap_value_t bits[] = {
642 CAP_SETUID, /* Necessary so that we can run setresuid() below */
643 CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */
644 };
645
646 /* First step: If we need to keep capabilities but
647 * drop privileges we need to make sure we keep our
35b8ca3a 648 * caps, whiel we drop privileges. */
693ced48
LP		 649 if (uid != 0) {
650 int sb = context->secure_bits|SECURE_KEEP_CAPS;
651
652 if (prctl(PR_GET_SECUREBITS) != sb)
653 if (prctl(PR_SET_SECUREBITS, sb) < 0)
654 return -errno;
655 }
81a2b7ce 656
35b8ca3a 657 /* Second step: set the capabilities. This will reduce
81a2b7ce
LP		 658 * the capabilities to the minimum we need. */
659
660 if (!(d = cap_dup(context->capabilities)))
661 return -errno;
662
663 if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 ||
664 cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) {
665 r = -errno;
666 cap_free(d);
667 return r;
668 }
669
670 if (cap_set_proc(d) < 0) {
671 r = -errno;
672 cap_free(d);
673 return r;
674 }
675
676 cap_free(d);
677 }
678
679 /* Third step: actually set the uids */
680 if (setresuid(uid, uid, uid) < 0)
681 return -errno;
682
683 /* At this point we should have all necessary capabilities but
684 are otherwise a normal user. However, the caps might got
685 corrupted due to the setresuid() so we need clean them up
686 later. This is done outside of this call. */
687
688 return 0;
689}
690
5b6319dc
LP		 691#ifdef HAVE_PAM
692
693static int null_conv(
694 int num_msg,
695 const struct pam_message **msg,
696 struct pam_response **resp,
697 void *appdata_ptr) {
698
699 /* We don't support conversations */
700
701 return PAM_CONV_ERR;
702}
703
704static int setup_pam(
705 const char *name,
706 const char *user,
707 const char *tty,
708 char ***pam_env,
709 int fds[], unsigned n_fds) {
710
711 static const struct pam_conv conv = {
712 .conv = null_conv,
713 .appdata_ptr = NULL
714 };
715
716 pam_handle_t *handle = NULL;
717 sigset_t ss, old_ss;
718 int pam_code = PAM_SUCCESS;
719 char **e = NULL;
720 bool close_session = false;
721 pid_t pam_pid = 0, parent_pid;
722
723 assert(name);
724 assert(user);
725 assert(pam_env);
726
727 /* We set up PAM in the parent process, then fork. The child
35b8ca3a 728 * will then stay around until killed via PR_GET_PDEATHSIG or
5b6319dc
LP		 729 * systemd via the cgroup logic. It will then remove the PAM
730 * session again. The parent process will exec() the actual
731 * daemon. We do things this way to ensure that the main PID
732 * of the daemon is the one we initially fork()ed. */
733
734 if ((pam_code = pam_start(name, user, &conv, &handle)) != PAM_SUCCESS) {
735 handle = NULL;
736 goto fail;
737 }
738
739 if (tty)
740 if ((pam_code = pam_set_item(handle, PAM_TTY, tty)) != PAM_SUCCESS)
741 goto fail;
742
743 if ((pam_code = pam_acct_mgmt(handle, PAM_SILENT)) != PAM_SUCCESS)
744 goto fail;
745
746 if ((pam_code = pam_open_session(handle, PAM_SILENT)) != PAM_SUCCESS)
747 goto fail;
748
749 close_session = true;
750
5b6319dc
LP		 751 if ((!(e = pam_getenvlist(handle)))) {
752 pam_code = PAM_BUF_ERR;
753 goto fail;
754 }
755
756 /* Block SIGTERM, so that we know that it won't get lost in
757 * the child */
758 if (sigemptyset(&ss) < 0 ||
759 sigaddset(&ss, SIGTERM) < 0 ||
760 sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0)
761 goto fail;
762
763 parent_pid = getpid();
764
765 if ((pam_pid = fork()) < 0)
766 goto fail;
767
768 if (pam_pid == 0) {
769 int sig;
770 int r = EXIT_PAM;
771
772 /* The child's job is to reset the PAM session on
773 * termination */
774
775 /* This string must fit in 10 chars (i.e. the length
776 * of "/sbin/init") */
3dead8d9 777 rename_process("sd(PAM)");
5b6319dc
LP		 778
779 /* Make sure we don't keep open the passed fds in this
780 child. We assume that otherwise only those fds are
781 open here that have been opened by PAM. */
782 close_many(fds, n_fds);
783
784 /* Wait until our parent died. This will most likely
785 * not work since the kernel does not allow
35b8ca3a 786 * unprivileged parents kill their privileged children
5b6319dc
LP		 787 * this way. We rely on the control groups kill logic
788 * to do the rest for us. */
789 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
790 goto child_finish;
791
792 /* Check if our parent process might already have
793 * died? */
794 if (getppid() == parent_pid) {
3dead8d9
LP		 795 for (;;) {
796 if (sigwait(&ss, &sig) < 0) {
797 if (errno == EINTR)
798 continue;
799
800 goto child_finish;
801 }
5b6319dc 802
3dead8d9
LP		 803 assert(sig == SIGTERM);
804 break;
805 }
5b6319dc
LP		 806 }
807
3dead8d9 808 /* If our parent died we'll end the session */
5b6319dc
LP		 809 if (getppid() != parent_pid)
810 if ((pam_code = pam_close_session(handle, PAM_DATA_SILENT)) != PAM_SUCCESS)
811 goto child_finish;
812
813 r = 0;
814
815 child_finish:
816 pam_end(handle, pam_code | PAM_DATA_SILENT);
817 _exit(r);
818 }
819
820 /* If the child was forked off successfully it will do all the
821 * cleanups, so forget about the handle here. */
822 handle = NULL;
823
3b8bddde 824 /* Unblock SIGTERM again in the parent */
5b6319dc
LP		 825 if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0)
826 goto fail;
827
828 /* We close the log explicitly here, since the PAM modules
829 * might have opened it, but we don't want this fd around. */
830 closelog();
831
aa87e624
LP		 832 *pam_env = e;
833 e = NULL;
834
5b6319dc
LP		 835 return 0;
836
837fail:
838 if (handle) {
839 if (close_session)
840 pam_code = pam_close_session(handle, PAM_DATA_SILENT);
841
842 pam_end(handle, pam_code | PAM_DATA_SILENT);
843 }
844
845 strv_free(e);
846
847 closelog();
848
430c18ed 849 if (pam_pid > 1) {
5b6319dc 850 kill(pam_pid, SIGTERM);
430c18ed
LP		 851 kill(pam_pid, SIGCONT);
852 }
5b6319dc
LP		 853
854 return EXIT_PAM;
855}
856#endif
857
73090dc8
LP		 858static int do_capability_bounding_set_drop(uint64_t drop) {
859 unsigned long i;
860 cap_t old_cap = NULL, new_cap = NULL;
861 cap_flag_value_t fv;
862 int r;
863
864 /* If we are run as PID 1 we will lack CAP_SETPCAP by default
865 * in the effective set (yes, the kernel drops that when
866 * executing init!), so get it back temporarily so that we can
867 * call PR_CAPBSET_DROP. */
868
869 old_cap = cap_get_proc();
870 if (!old_cap)
871 return -errno;
872
873 if (cap_get_flag(old_cap, CAP_SETPCAP, CAP_EFFECTIVE, &fv) < 0) {
874 r = -errno;
875 goto finish;
876 }
877
878 if (fv != CAP_SET) {
879 static const cap_value_t v = CAP_SETPCAP;
880
881 new_cap = cap_dup(old_cap);
882 if (!new_cap) {
883 r = -errno;
884 goto finish;
885 }
886
887 if (cap_set_flag(new_cap, CAP_EFFECTIVE, 1, &v, CAP_SET) < 0) {
888 r = -errno;
889 goto finish;
890 }
891
892 if (cap_set_proc(new_cap) < 0) {
893 r = -errno;
894 goto finish;
895 }
896 }
897
ae556c21 898 for (i = 0; i <= MAX(63LU, (unsigned long) CAP_LAST_CAP); i++)
73090dc8
LP		 899 if (drop & ((uint64_t) 1ULL << (uint64_t) i)) {
900 if (prctl(PR_CAPBSET_DROP, i) < 0) {
ae556c21
LP		 901 if (errno == EINVAL)
902 break;
903
73090dc8
LP		 904 r = -errno;
905 goto finish;
906 }
907 }
908
909 r = 0;
910
911finish:
912 if (new_cap)
913 cap_free(new_cap);
914
915 if (old_cap) {
916 cap_set_proc(old_cap);
917 cap_free(old_cap);
918 }
919
920 return r;
921}
922
9fb86720 923int exec_spawn(ExecCommand *command,
9e2f7c11 924 char **argv,
81a2b7ce 925 const ExecContext *context,
c2748801 926 int fds[], unsigned n_fds,
1137a57c 927 char **environment,
81a2b7ce
LP		 928 bool apply_permissions,
929 bool apply_chroot,
1e3ad081 930 bool apply_tty_stdin,
80876c20 931 bool confirm_spawn,
8e274523 932 CGroupBonding *cgroup_bondings,
ab1f0633 933 CGroupAttribute *cgroup_attributes,
81a2b7ce
LP		 934 pid_t *ret) {
935
034c6ed7 936 pid_t pid;
8e274523 937 int r;
1a63a750 938 char *line;
4f2d528d 939 int socket_fd;
8c7be95e 940 char **files_env = NULL;
034c6ed7 941
5cb5a6ff
LP		 942 assert(command);
943 assert(context);
944 assert(ret);
034c6ed7
LP		 945 assert(fds || n_fds <= 0);
946
4f2d528d
LP		 947 if (context->std_input == EXEC_INPUT_SOCKET ||
948 context->std_output == EXEC_OUTPUT_SOCKET ||
949 context->std_error == EXEC_OUTPUT_SOCKET) {
950
951 if (n_fds != 1)
952 return -EINVAL;
953
954 socket_fd = fds[0];
955
956 fds = NULL;
957 n_fds = 0;
958 } else
959 socket_fd = -1;
960
8c7be95e
LP		 961 if ((r = exec_context_load_environment(context, &files_env)) < 0) {
962 log_error("Failed to load environment files: %s", strerror(-r));
963 return r;
964 }
965
9e2f7c11
LP		 966 if (!argv)
967 argv = command->argv;
968
8c7be95e
LP		 969 if (!(line = exec_command_line(argv))) {
970 r = -ENOMEM;
971 goto fail_parent;
972 }
1a63a750
LP		 973
974 log_debug("About to execute: %s", line);
975 free(line);
acbb0225 976
ab1f0633
LP		 977 r = cgroup_bonding_realize_list(cgroup_bondings);
978 if (r < 0)
979 goto fail_parent;
980
981 cgroup_attribute_apply_list(cgroup_attributes, cgroup_bondings);
8e274523 982
8c7be95e
LP		 983 if ((pid = fork()) < 0) {
984 r = -errno;
985 goto fail_parent;
986 }
034c6ed7
LP		 987
988 if (pid == 0) {
8e274523 989 int i;
309bff19 990 sigset_t ss;
81a2b7ce
LP		 991 const char *username = NULL, *home = NULL;
992 uid_t uid = (uid_t) -1;
993 gid_t gid = (gid_t) -1;
fab56fc5 994 char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL;
81a2b7ce 995 unsigned n_env = 0;
80876c20
LP		 996 int saved_stdout = -1, saved_stdin = -1;
997 bool keep_stdout = false, keep_stdin = false;
309bff19 998
034c6ed7 999 /* child */
5cb5a6ff 1000
5b6319dc
LP		 1001 /* This string must fit in 10 chars (i.e. the length
1002 * of "/sbin/init") */
aa87e624 1003 rename_process("sd(EXEC)");
5b6319dc 1004
1b91d3e8
LP		 1005 /* We reset exactly these signals, since they are the
1006 * only ones we set to SIG_IGN in the main daemon. All
1007 * others we leave untouched because we set them to
1008 * SIG_DFL or a valid handler initially, both of which
1009 * will be demoted to SIG_DFL. */
1010 default_signals(SIGNALS_CRASH_HANDLER,
9a34ec5f 1011 SIGNALS_IGNORE, -1);
7b683879 1012
309bff19
LP		 1013 if (sigemptyset(&ss) < 0 ||
1014 sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
1015 r = EXIT_SIGNAL_MASK;
8c7be95e 1016 goto fail_child;
309bff19
LP		 1017 }
1018
85d73053
LP		 1019 /* Close sockets very early to make sure we don't
1020 * block init reexecution because it cannot bind its
1021 * sockets */
73883adc
LP		 1022 if (close_all_fds(socket_fd >= 0 ? &socket_fd : fds,
1023 socket_fd >= 0 ? 1 : n_fds) < 0) {
fc9b2a84 1024 r = EXIT_FDS;
8c7be95e 1025 goto fail_child;
fc9b2a84
LP		 1026 }
1027
74922904 1028 if (!context->same_pgrp)
8d567588
LP		 1029 if (setsid() < 0) {
1030 r = EXIT_SETSID;
8c7be95e 1031 goto fail_child;
8d567588 1032 }
80876c20 1033
c5da34ef
LP		 1034 if (context->tcpwrap_name) {
1035 if (socket_fd >= 0)
1036 if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
1037 r = EXIT_TCPWRAP;
8c7be95e 1038 goto fail_child;
c5da34ef
LP		 1039 }
1040
1041 for (i = 0; i < (int) n_fds; i++) {
1042 if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) {
1043 r = EXIT_TCPWRAP;
8c7be95e 1044 goto fail_child;
c5da34ef 1045 }
df1f0afe 1046 }
c5da34ef 1047 }
df1f0afe 1048
6ea832a2
LP		 1049 exec_context_tty_reset(context);
1050
1e3ad081
LP		 1051 /* We skip the confirmation step if we shall not apply the TTY */
1052 if (confirm_spawn &&
1053 (!is_terminal_input(context->std_input) || apply_tty_stdin)) {
80876c20
LP		 1054 char response;
1055
1056 /* Set up terminal for the question */
1057 if ((r = setup_confirm_stdio(context,
1058 &saved_stdin, &saved_stdout)))
8c7be95e 1059 goto fail_child;
80876c20
LP		 1060
1061 /* Now ask the question. */
9e2f7c11 1062 if (!(line = exec_command_line(argv))) {
80876c20 1063 r = EXIT_MEMORY;
8c7be95e 1064 goto fail_child;
ee2b4894 1065 }
80876c20
LP		 1066
1067 r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
1068 free(line);
1069
1070 if (r < 0 || response == 'n') {
1071 r = EXIT_CONFIRM;
8c7be95e 1072 goto fail_child;
80876c20
LP		 1073 } else if (response == 's') {
1074 r = 0;
8c7be95e 1075 goto fail_child;
ee2b4894 1076 }
80876c20
LP		 1077
1078 /* Release terminal for the question */
2608882f 1079 if ((r = restore_confirm_stdio(context,
80876c20
LP		 1080 &saved_stdin, &saved_stdout,
1081 &keep_stdin, &keep_stdout)))
8c7be95e 1082 goto fail_child;
034c6ed7
LP		 1083 }
1084
da726a4d
LP		 1085 /* If a socket is connected to STDIN/STDOUT/STDERR, we
1086 * must sure to drop O_NONBLOCK */
1087 if (socket_fd >= 0)
1088 fd_nonblock(socket_fd, false);
1089
80876c20 1090 if (!keep_stdin)
1e3ad081 1091 if (setup_input(context, socket_fd, apply_tty_stdin) < 0) {
80876c20 1092 r = EXIT_STDIN;
8c7be95e 1093 goto fail_child;
80876c20 1094 }
9eba9da4 1095
80876c20 1096 if (!keep_stdout)
1e3ad081 1097 if (setup_output(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
80876c20 1098 r = EXIT_STDOUT;
8c7be95e 1099 goto fail_child;
80876c20 1100 }
94f04347 1101
1e3ad081 1102 if (setup_error(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
80876c20 1103 r = EXIT_STDERR;
8c7be95e 1104 goto fail_child;
071830ff
LP		 1105 }
1106
8e274523 1107 if (cgroup_bondings)
e364ad06 1108 if (cgroup_bonding_install_list(cgroup_bondings, 0) < 0) {
8e274523 1109 r = EXIT_CGROUP;
8c7be95e 1110 goto fail_child;
8e274523
LP		 1111 }
1112
dd6c17b1 1113 if (context->oom_score_adjust_set) {
fb33a393 1114 char t[16];
034c6ed7 1115
dd6c17b1 1116 snprintf(t, sizeof(t), "%i", context->oom_score_adjust);
fb33a393 1117 char_array_0(t);
034c6ed7 1118
dd6c17b1
LP		 1119 if (write_one_line_file("/proc/self/oom_score_adj", t) < 0) {
1120 /* Compatibility with Linux <= 2.6.35 */
1121
1122 int adj;
1123
1124 adj = (context->oom_score_adjust * -OOM_DISABLE) / OOM_SCORE_ADJ_MAX;
1125 adj = CLAMP(adj, OOM_DISABLE, OOM_ADJUST_MAX);
1126
1127 snprintf(t, sizeof(t), "%i", adj);
1128 char_array_0(t);
1129
90a5f6e4
LP		 1130 if (write_one_line_file("/proc/self/oom_adj", t) < 0
1131 && errno != EACCES) {
dd6c17b1 1132 r = EXIT_OOM_ADJUST;
8c7be95e 1133 goto fail_child;
dd6c17b1 1134 }
fb33a393 1135 }
034c6ed7
LP		 1136 }
1137
fb33a393
LP		 1138 if (context->nice_set)
1139 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
1140 r = EXIT_NICE;
8c7be95e 1141 goto fail_child;
fb33a393
LP		 1142 }
1143
94f04347
LP		 1144 if (context->cpu_sched_set) {
1145 struct sched_param param;
1146
1147 zero(param);
1148 param.sched_priority = context->cpu_sched_priority;
1149
38b48754
LP		 1150 if (sched_setscheduler(0, context->cpu_sched_policy |
1151 (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), &param) < 0) {
94f04347 1152 r = EXIT_SETSCHEDULER;
8c7be95e 1153 goto fail_child;
94f04347
LP		 1154 }
1155 }
1156
82c121a4
LP		 1157 if (context->cpuset)
1158 if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) {
94f04347 1159 r = EXIT_CPUAFFINITY;
8c7be95e 1160 goto fail_child;
94f04347
LP		 1161 }
1162
9eba9da4
LP		 1163 if (context->ioprio_set)
1164 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
1165 r = EXIT_IOPRIO;
8c7be95e 1166 goto fail_child;
9eba9da4
LP		 1167 }
1168
03fae018
LP		 1169 if (context->timer_slack_nsec_set)
1170 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
94f04347 1171 r = EXIT_TIMERSLACK;
8c7be95e 1172 goto fail_child;
94f04347
LP		 1173 }
1174
169c1bda
LP		 1175 if (context->utmp_id)
1176 utmp_put_init_process(0, context->utmp_id, getpid(), getsid(0), context->tty_path);
1177
81a2b7ce
LP		 1178 if (context->user) {
1179 username = context->user;
1180 if (get_user_creds(&username, &uid, &gid, &home) < 0) {
1181 r = EXIT_USER;
8c7be95e 1182 goto fail_child;
81a2b7ce 1183 }
d8b4e2e9
LP		 1184
1185 if (is_terminal_input(context->std_input))
1186 if (chown_terminal(STDIN_FILENO, uid) < 0) {
1187 r = EXIT_STDIN;
8c7be95e 1188 goto fail_child;
d8b4e2e9 1189 }
64747e2d
LP		 1190
1191 if (cgroup_bondings && context->control_group_modify)
1192 if (cgroup_bonding_set_group_access_list(cgroup_bondings, 0755, uid, gid) < 0 ||
1193 cgroup_bonding_set_task_access_list(cgroup_bondings, 0644, uid, gid) < 0) {
1194 r = EXIT_CGROUP;
1195 goto fail_child;
1196 }
81a2b7ce
LP		 1197 }
1198
3b8bddde 1199 if (apply_permissions)
fa8f36ac 1200 if (enforce_groups(context, username, gid) < 0) {
3b8bddde
LP		 1201 r = EXIT_GROUP;
1202 goto fail_child;
1203 }
1204
1205 umask(context->umask);
1206
5b6319dc
LP		 1207#ifdef HAVE_PAM
1208 if (context->pam_name && username) {
7fbf31df 1209 if (setup_pam(context->pam_name, username, context->tty_path, &pam_env, fds, n_fds) != 0) {
5b6319dc 1210 r = EXIT_PAM;
8c7be95e 1211 goto fail_child;
5b6319dc
LP		 1212 }
1213 }
1214#endif
ff01d048
LP		 1215 if (context->private_network) {
1216 if (unshare(CLONE_NEWNET) < 0) {
1217 r = EXIT_NETWORK;
1218 goto fail_child;
1219 }
1220
1221 loopback_setup();
1222 }
5b6319dc 1223
04aa0cb9
LP		 1224 if (strv_length(context->read_write_dirs) > 0 ||
1225 strv_length(context->read_only_dirs) > 0 ||
1226 strv_length(context->inaccessible_dirs) > 0 ||
1227 context->mount_flags != MS_SHARED ||
1228 context->private_tmp)
1229 if ((r = setup_namespace(
1230 context->read_write_dirs,
1231 context->read_only_dirs,
1232 context->inaccessible_dirs,
1233 context->private_tmp,
1234 context->mount_flags)) < 0)
8c7be95e 1235 goto fail_child;
04aa0cb9 1236
81a2b7ce
LP		 1237 if (apply_chroot) {
1238 if (context->root_directory)
1239 if (chroot(context->root_directory) < 0) {
1240 r = EXIT_CHROOT;
8c7be95e 1241 goto fail_child;
81a2b7ce
LP		 1242 }
1243
1244 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
1245 r = EXIT_CHDIR;
8c7be95e 1246 goto fail_child;
81a2b7ce
LP		 1247 }
1248 } else {
1249
1250 char *d;
1251
1252 if (asprintf(&d, "%s/%s",
1253 context->root_directory ? context->root_directory : "",
1254 context->working_directory ? context->working_directory : "") < 0) {
1255 r = EXIT_MEMORY;
8c7be95e 1256 goto fail_child;
81a2b7ce
LP		 1257 }
1258
1259 if (chdir(d) < 0) {
1260 free(d);
1261 r = EXIT_CHDIR;
8c7be95e 1262 goto fail_child;
81a2b7ce
LP		 1263 }
1264
1265 free(d);
1266 }
1267
fc9b2a84
LP		 1268 /* We repeat the fd closing here, to make sure that
1269 * nothing is leaked from the PAM modules */
a0d40ac5 1270 if (close_all_fds(fds, n_fds) < 0 ||
47a71eed 1271 shift_fds(fds, n_fds) < 0 ||
451a074f 1272 flags_fds(fds, n_fds, context->non_blocking) < 0) {
034c6ed7 1273 r = EXIT_FDS;
8c7be95e 1274 goto fail_child;
034c6ed7
LP		 1275 }
1276
81a2b7ce 1277 if (apply_permissions) {
034c6ed7 1278
81a2b7ce
LP		 1279 for (i = 0; i < RLIMIT_NLIMITS; i++) {
1280 if (!context->rlimit[i])
1281 continue;
1282
1283 if (setrlimit(i, context->rlimit[i]) < 0) {
1284 r = EXIT_LIMITS;
8c7be95e 1285 goto fail_child;
81a2b7ce 1286 }
034c6ed7 1287 }
034c6ed7 1288
260abb78 1289 if (context->capability_bounding_set_drop)
73090dc8
LP		 1290 if (do_capability_bounding_set_drop(context->capability_bounding_set_drop) < 0) {
1291 r = EXIT_CAPABILITIES;
1292 goto fail_child;
1293 }
260abb78 1294
81a2b7ce
LP		 1295 if (context->user)
1296 if (enforce_user(context, uid) < 0) {
1297 r = EXIT_USER;
8c7be95e 1298 goto fail_child;
81a2b7ce
LP		 1299 }
1300
35b8ca3a 1301 /* PR_GET_SECUREBITS is not privileged, while
693ced48
LP		 1302 * PR_SET_SECUREBITS is. So to suppress
1303 * potential EPERMs we'll try not to call
1304 * PR_SET_SECUREBITS unless necessary. */
1305 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
1306 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
1307 r = EXIT_SECUREBITS;
8c7be95e 1308 goto fail_child;
693ced48 1309 }
81a2b7ce
LP		 1310
1311 if (context->capabilities)
1312 if (cap_set_proc(context->capabilities) < 0) {
1313 r = EXIT_CAPABILITIES;
8c7be95e 1314 goto fail_child;
81a2b7ce 1315 }
94f04347
LP		 1316 }
1317
e3aa71c3 1318 if (!(our_env = new0(char*, 7))) {
81a2b7ce 1319 r = EXIT_MEMORY;
8c7be95e 1320 goto fail_child;
81a2b7ce 1321 }
034c6ed7 1322
81a2b7ce 1323 if (n_fds > 0)
bb00e604 1324 if (asprintf(our_env + n_env++, "LISTEN_PID=%lu", (unsigned long) getpid()) < 0 ||
81a2b7ce
LP		 1325 asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
1326 r = EXIT_MEMORY;
8c7be95e 1327 goto fail_child;
81a2b7ce 1328 }
034c6ed7 1329
81a2b7ce
LP		 1330 if (home)
1331 if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
1332 r = EXIT_MEMORY;
8c7be95e 1333 goto fail_child;
81a2b7ce 1334 }
034c6ed7 1335
81a2b7ce
LP		 1336 if (username)
1337 if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
1338 asprintf(our_env + n_env++, "USER=%s", username) < 0) {
1339 r = EXIT_MEMORY;
8c7be95e 1340 goto fail_child;
81a2b7ce 1341 }
034c6ed7 1342
e3aa71c3
LP		 1343 if (is_terminal_input(context->std_input) ||
1344 context->std_output == EXEC_OUTPUT_TTY ||
1345 context->std_error == EXEC_OUTPUT_TTY)
1346 if (!(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))) {
1347 r = EXIT_MEMORY;
8c7be95e 1348 goto fail_child;
e3aa71c3
LP		 1349 }
1350
1351 assert(n_env <= 7);
4e85aff4 1352
5b6319dc 1353 if (!(final_env = strv_env_merge(
8c7be95e 1354 5,
5b6319dc
LP		 1355 environment,
1356 our_env,
1357 context->environment,
8c7be95e 1358 files_env,
5b6319dc
LP		 1359 pam_env,
1360 NULL))) {
81a2b7ce 1361 r = EXIT_MEMORY;
8c7be95e 1362 goto fail_child;
81a2b7ce 1363 }
034c6ed7 1364
fab56fc5
LP		 1365 if (!(final_argv = replace_env_argv(argv, final_env))) {
1366 r = EXIT_MEMORY;
8c7be95e 1367 goto fail_child;
fab56fc5
LP		 1368 }
1369
a6ff950e
LP		 1370 final_env = strv_env_clean(final_env);
1371
fab56fc5 1372 execve(command->path, final_argv, final_env);
034c6ed7
LP		 1373 r = EXIT_EXEC;
1374
8c7be95e 1375 fail_child:
81a2b7ce
LP		 1376 strv_free(our_env);
1377 strv_free(final_env);
5b6319dc 1378 strv_free(pam_env);
8c7be95e 1379 strv_free(files_env);
fab56fc5 1380 strv_free(final_argv);
81a2b7ce 1381
80876c20
LP		 1382 if (saved_stdin >= 0)
1383 close_nointr_nofail(saved_stdin);
1384
1385 if (saved_stdout >= 0)
1386 close_nointr_nofail(saved_stdout);
1387
034c6ed7
LP		 1388 _exit(r);
1389 }
1390
8c7be95e
LP		 1391 strv_free(files_env);
1392
80876c20
LP		 1393 /* We add the new process to the cgroup both in the child (so
1394 * that we can be sure that no user code is ever executed
1395 * outside of the cgroup) and in the parent (so that we can be
1396 * sure that when we kill the cgroup the process will be
1397 * killed too). */
1398 if (cgroup_bondings)
4e85aff4 1399 cgroup_bonding_install_list(cgroup_bondings, pid);
2da3263a 1400
bb00e604 1401 log_debug("Forked %s as %lu", command->path, (unsigned long) pid);
2da3263a 1402
b58b4116 1403 exec_status_start(&command->exec_status, pid);
9fb86720 1404
034c6ed7 1405 *ret = pid;
5cb5a6ff 1406 return 0;
8c7be95e
LP		 1407
1408fail_parent:
1409 strv_free(files_env);
1410
1411 return r;
5cb5a6ff
LP		 1412}
1413
034c6ed7
LP		 1414void exec_context_init(ExecContext *c) {
1415 assert(c);
1416
4c12626c 1417 c->umask = 0022;
9eba9da4 1418 c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
94f04347 1419 c->cpu_sched_policy = SCHED_OTHER;
071830ff 1420 c->syslog_priority = LOG_DAEMON|LOG_INFO;
74922904 1421 c->syslog_level_prefix = true;
15ae422b 1422 c->mount_flags = MS_SHARED;
2e22afe9 1423 c->kill_signal = SIGTERM;
ba035df2 1424 c->send_sigkill = true;
034c6ed7
LP		 1425}
1426
1427void exec_context_done(ExecContext *c) {
5cb5a6ff
LP		 1428 unsigned l;
1429
1430 assert(c);
1431
1432 strv_free(c->environment);
034c6ed7 1433 c->environment = NULL;
5cb5a6ff 1434
8c7be95e
LP		 1435 strv_free(c->environment_files);
1436 c->environment_files = NULL;
1437
034c6ed7 1438 for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
5cb5a6ff 1439 free(c->rlimit[l]);
034c6ed7
LP		 1440 c->rlimit[l] = NULL;
1441 }
1442
9eba9da4
LP		 1443 free(c->working_directory);
1444 c->working_directory = NULL;
1445 free(c->root_directory);
1446 c->root_directory = NULL;
5cb5a6ff 1447
80876c20
LP		 1448 free(c->tty_path);
1449 c->tty_path = NULL;
1450
df1f0afe
LP		 1451 free(c->tcpwrap_name);
1452 c->tcpwrap_name = NULL;
1453
071830ff
LP		 1454 free(c->syslog_identifier);
1455 c->syslog_identifier = NULL;
1456
5cb5a6ff 1457 free(c->user);
034c6ed7
LP		 1458 c->user = NULL;
1459
5cb5a6ff 1460 free(c->group);
034c6ed7
LP		 1461 c->group = NULL;
1462
1463 strv_free(c->supplementary_groups);
1464 c->supplementary_groups = NULL;
94f04347 1465
5b6319dc
LP		 1466 free(c->pam_name);
1467 c->pam_name = NULL;
1468
94f04347
LP		 1469 if (c->capabilities) {
1470 cap_free(c->capabilities);
1471 c->capabilities = NULL;
1472 }
15ae422b
LP		 1473
1474 strv_free(c->read_only_dirs);
1475 c->read_only_dirs = NULL;
1476
1477 strv_free(c->read_write_dirs);
1478 c->read_write_dirs = NULL;
1479
1480 strv_free(c->inaccessible_dirs);
1481 c->inaccessible_dirs = NULL;
82c121a4
LP		 1482
1483 if (c->cpuset)
1484 CPU_FREE(c->cpuset);
86a3475b
LP		 1485
1486 free(c->utmp_id);
1487 c->utmp_id = NULL;
5cb5a6ff
LP		 1488}
1489
43d0fcbd
LP		 1490void exec_command_done(ExecCommand *c) {
1491 assert(c);
1492
1493 free(c->path);
1494 c->path = NULL;
1495
1496 strv_free(c->argv);
1497 c->argv = NULL;
1498}
1499
1500void exec_command_done_array(ExecCommand *c, unsigned n) {
1501 unsigned i;
1502
1503 for (i = 0; i < n; i++)
1504 exec_command_done(c+i);
1505}
1506
5cb5a6ff
LP		 1507void exec_command_free_list(ExecCommand *c) {
1508 ExecCommand *i;
1509
1510 while ((i = c)) {
034c6ed7 1511 LIST_REMOVE(ExecCommand, command, c, i);
43d0fcbd 1512 exec_command_done(i);
5cb5a6ff
LP		 1513 free(i);
1514 }
1515}
1516
034c6ed7
LP		 1517void exec_command_free_array(ExecCommand **c, unsigned n) {
1518 unsigned i;
1519
1520 for (i = 0; i < n; i++) {
1521 exec_command_free_list(c[i]);
1522 c[i] = NULL;
1523 }
1524}
1525
8c7be95e
LP		 1526int exec_context_load_environment(const ExecContext *c, char ***l) {
1527 char **i, **r = NULL;
1528
1529 assert(c);
1530 assert(l);
1531
1532 STRV_FOREACH(i, c->environment_files) {
1533 char *fn;
1534 int k;
1535 bool ignore = false;
1536 char **p;
1537
1538 fn = *i;
1539
1540 if (fn[0] == '-') {
1541 ignore = true;
1542 fn ++;
1543 }
1544
1545 if (!path_is_absolute(fn)) {
1546
1547 if (ignore)
1548 continue;
1549
1550 strv_free(r);
1551 return -EINVAL;
1552 }
1553
1554 if ((k = load_env_file(fn, &p)) < 0) {
1555
1556 if (ignore)
1557 continue;
1558
1559 strv_free(r);
1560 return k;
1561 }
1562
1563 if (r == NULL)
1564 r = p;
1565 else {
1566 char **m;
1567
1568 m = strv_env_merge(2, r, p);
1569 strv_free(r);
1570 strv_free(p);
1571
1572 if (!m)
1573 return -ENOMEM;
1574
1575 r = m;
1576 }
1577 }
1578
1579 *l = r;
1580
1581 return 0;
1582}
1583
15ae422b
LP		 1584static void strv_fprintf(FILE *f, char **l) {
1585 char **g;
1586
1587 assert(f);
1588
1589 STRV_FOREACH(g, l)
1590 fprintf(f, " %s", *g);
1591}
1592
5cb5a6ff 1593void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
94f04347
LP		 1594 char ** e;
1595 unsigned i;
9eba9da4 1596
5cb5a6ff
LP		 1597 assert(c);
1598 assert(f);
1599
1600 if (!prefix)
1601 prefix = "";
1602
1603 fprintf(f,
94f04347
LP		 1604 "%sUMask: %04o\n"
1605 "%sWorkingDirectory: %s\n"
451a074f 1606 "%sRootDirectory: %s\n"
15ae422b 1607 "%sNonBlocking: %s\n"
64747e2d 1608 "%sPrivateTmp: %s\n"
ff01d048
LP		 1609 "%sControlGroupModify: %s\n"
1610 "%sPrivateNetwork: %s\n",
5cb5a6ff 1611 prefix, c->umask,
9eba9da4 1612 prefix, c->working_directory ? c->working_directory : "/",
451a074f 1613 prefix, c->root_directory ? c->root_directory : "/",
15ae422b 1614 prefix, yes_no(c->non_blocking),
64747e2d 1615 prefix, yes_no(c->private_tmp),
ff01d048
LP		 1616 prefix, yes_no(c->control_group_modify),
1617 prefix, yes_no(c->private_network));
fb33a393 1618
8c7be95e
LP		 1619 STRV_FOREACH(e, c->environment)
1620 fprintf(f, "%sEnvironment: %s\n", prefix, *e);
1621
1622 STRV_FOREACH(e, c->environment_files)
1623 fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e);
94f04347 1624
df1f0afe
LP		 1625 if (c->tcpwrap_name)
1626 fprintf(f,
1627 "%sTCPWrapName: %s\n",
1628 prefix, c->tcpwrap_name);
1629
fb33a393
LP		 1630 if (c->nice_set)
1631 fprintf(f,
1632 "%sNice: %i\n",
1633 prefix, c->nice);
1634
dd6c17b1 1635 if (c->oom_score_adjust_set)
fb33a393 1636 fprintf(f,
dd6c17b1
LP		 1637 "%sOOMScoreAdjust: %i\n",
1638 prefix, c->oom_score_adjust);
9eba9da4 1639
94f04347
LP		 1640 for (i = 0; i < RLIM_NLIMITS; i++)
1641 if (c->rlimit[i])
ea430986 1642 fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
94f04347 1643
9eba9da4
LP		 1644 if (c->ioprio_set)
1645 fprintf(f,
1646 "%sIOSchedulingClass: %s\n"
1647 "%sIOPriority: %i\n",
94f04347 1648 prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
9eba9da4 1649 prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
94f04347
LP		 1650
1651 if (c->cpu_sched_set)
1652 fprintf(f,
1653 "%sCPUSchedulingPolicy: %s\n"
38b48754
LP		 1654 "%sCPUSchedulingPriority: %i\n"
1655 "%sCPUSchedulingResetOnFork: %s\n",
94f04347 1656 prefix, sched_policy_to_string(c->cpu_sched_policy),
38b48754
LP		 1657 prefix, c->cpu_sched_priority,
1658 prefix, yes_no(c->cpu_sched_reset_on_fork));
94f04347 1659
82c121a4 1660 if (c->cpuset) {
94f04347 1661 fprintf(f, "%sCPUAffinity:", prefix);
82c121a4
LP		 1662 for (i = 0; i < c->cpuset_ncpus; i++)
1663 if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset))
94f04347
LP		 1664 fprintf(f, " %i", i);
1665 fputs("\n", f);
1666 }
1667
03fae018
LP		 1668 if (c->timer_slack_nsec_set)
1669 fprintf(f, "%sTimerSlackNSec: %lu\n", prefix, c->timer_slack_nsec);
94f04347
LP		 1670
1671 fprintf(f,
80876c20
LP		 1672 "%sStandardInput: %s\n"
1673 "%sStandardOutput: %s\n"
1674 "%sStandardError: %s\n",
1675 prefix, exec_input_to_string(c->std_input),
1676 prefix, exec_output_to_string(c->std_output),
1677 prefix, exec_output_to_string(c->std_error));
1678
1679 if (c->tty_path)
1680 fprintf(f,
6ea832a2
LP		 1681 "%sTTYPath: %s\n"
1682 "%sTTYReset: %s\n"
1683 "%sTTYVHangup: %s\n"
1684 "%sTTYVTDisallocate: %s\n",
1685 prefix, c->tty_path,
1686 prefix, yes_no(c->tty_reset),
1687 prefix, yes_no(c->tty_vhangup),
1688 prefix, yes_no(c->tty_vt_disallocate));
94f04347 1689
9a6bca7a 1690 if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG ||
28dbc1e8
LP		 1691 c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
1692 c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG ||
1693 c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE)
94f04347
LP		 1694 fprintf(f,
1695 "%sSyslogFacility: %s\n"
1696 "%sSyslogLevel: %s\n",
7d76f312 1697 prefix, log_facility_unshifted_to_string(c->syslog_priority >> 3),
94f04347
LP		 1698 prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
1699
1700 if (c->capabilities) {
1701 char *t;
1702 if ((t = cap_to_text(c->capabilities, NULL))) {
1703 fprintf(f, "%sCapabilities: %s\n",
1704 prefix, t);
1705 cap_free(t);
1706 }
1707 }
1708
1709 if (c->secure_bits)
1710 fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
1711 prefix,
1712 (c->secure_bits & SECURE_KEEP_CAPS) ? " keep-caps" : "",
1713 (c->secure_bits & SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
1714 (c->secure_bits & SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
1715 (c->secure_bits & SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
1716 (c->secure_bits & SECURE_NOROOT) ? " noroot" : "",
1717 (c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
1718
1719 if (c->capability_bounding_set_drop) {
ae556c21 1720 unsigned long l;
260abb78 1721 fprintf(f, "%sCapabilityBoundingSet:", prefix);
94f04347 1722
ae556c21
LP		 1723 for (l = 0; l <= (unsigned long) CAP_LAST_CAP; l++)
1724 if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) {
94f04347
LP		 1725 char *t;
1726
ae556c21 1727 if ((t = cap_to_name(l))) {
94f04347 1728 fprintf(f, " %s", t);
260abb78 1729 cap_free(t);
94f04347
LP		 1730 }
1731 }
1732
1733 fputs("\n", f);
1734 }
1735
1736 if (c->user)
f2d3769a 1737 fprintf(f, "%sUser: %s\n", prefix, c->user);
94f04347 1738 if (c->group)
f2d3769a 1739 fprintf(f, "%sGroup: %s\n", prefix, c->group);
94f04347 1740
15ae422b 1741 if (strv_length(c->supplementary_groups) > 0) {
94f04347 1742 fprintf(f, "%sSupplementaryGroups:", prefix);
15ae422b
LP		 1743 strv_fprintf(f, c->supplementary_groups);
1744 fputs("\n", f);
1745 }
94f04347 1746
5b6319dc 1747 if (c->pam_name)
f2d3769a 1748 fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name);
5b6319dc 1749
15ae422b
LP		 1750 if (strv_length(c->read_write_dirs) > 0) {
1751 fprintf(f, "%sReadWriteDirs:", prefix);
1752 strv_fprintf(f, c->read_write_dirs);
1753 fputs("\n", f);
1754 }
1755
1756 if (strv_length(c->read_only_dirs) > 0) {
1757 fprintf(f, "%sReadOnlyDirs:", prefix);
1758 strv_fprintf(f, c->read_only_dirs);
1759 fputs("\n", f);
1760 }
94f04347 1761
15ae422b
LP		 1762 if (strv_length(c->inaccessible_dirs) > 0) {
1763 fprintf(f, "%sInaccessibleDirs:", prefix);
1764 strv_fprintf(f, c->inaccessible_dirs);
94f04347
LP		 1765 fputs("\n", f);
1766 }
2e22afe9
LP		 1767
1768 fprintf(f,
1769 "%sKillMode: %s\n"
ba035df2
LP		 1770 "%sKillSignal: SIG%s\n"
1771 "%sSendSIGKILL: %s\n",
2e22afe9 1772 prefix, kill_mode_to_string(c->kill_mode),
ba035df2
LP		 1773 prefix, signal_to_string(c->kill_signal),
1774 prefix, yes_no(c->send_sigkill));
169c1bda
LP		 1775
1776 if (c->utmp_id)
1777 fprintf(f,
1778 "%sUtmpIdentifier: %s\n",
1779 prefix, c->utmp_id);
5cb5a6ff
LP		 1780}
1781
b58b4116 1782void exec_status_start(ExecStatus *s, pid_t pid) {
034c6ed7 1783 assert(s);
5cb5a6ff 1784
b58b4116
LP		 1785 zero(*s);
1786 s->pid = pid;
1787 dual_timestamp_get(&s->start_timestamp);
1788}
1789
6ea832a2 1790void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) {
b58b4116
LP		 1791 assert(s);
1792
1793 if ((s->pid && s->pid != pid) ||
1794 !s->start_timestamp.realtime <= 0)
1795 zero(*s);
1796
034c6ed7 1797 s->pid = pid;
63983207 1798 dual_timestamp_get(&s->exit_timestamp);
9fb86720 1799
034c6ed7
LP		 1800 s->code = code;
1801 s->status = status;
169c1bda 1802
6ea832a2
LP		 1803 if (context) {
1804 if (context->utmp_id)
1805 utmp_put_dead_process(context->utmp_id, pid, code, status);
1806
1807 exec_context_tty_reset(context);
1808 }
9fb86720
LP		 1809}
1810
1811void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
1812 char buf[FORMAT_TIMESTAMP_MAX];
1813
1814 assert(s);
1815 assert(f);
1816
1817 if (!prefix)
1818 prefix = "";
1819
1820 if (s->pid <= 0)
1821 return;
1822
1823 fprintf(f,
bb00e604
LP		 1824 "%sPID: %lu\n",
1825 prefix, (unsigned long) s->pid);
9fb86720 1826
63983207 1827 if (s->start_timestamp.realtime > 0)
9fb86720
LP		 1828 fprintf(f,
1829 "%sStart Timestamp: %s\n",
63983207 1830 prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime));
9fb86720 1831
63983207 1832 if (s->exit_timestamp.realtime > 0)
9fb86720
LP		 1833 fprintf(f,
1834 "%sExit Timestamp: %s\n"
1835 "%sExit Code: %s\n"
1836 "%sExit Status: %i\n",
63983207 1837 prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime),
9fb86720
LP		 1838 prefix, sigchld_code_to_string(s->code),
1839 prefix, s->status);
5cb5a6ff 1840}
44d8db9e 1841
9e2f7c11 1842char *exec_command_line(char **argv) {
44d8db9e
LP		 1843 size_t k;
1844 char *n, *p, **a;
1845 bool first = true;
1846
9e2f7c11 1847 assert(argv);
44d8db9e 1848
9164977d 1849 k = 1;
9e2f7c11 1850 STRV_FOREACH(a, argv)
44d8db9e
LP		 1851 k += strlen(*a)+3;
1852
1853 if (!(n = new(char, k)))
1854 return NULL;
1855
1856 p = n;
9e2f7c11 1857 STRV_FOREACH(a, argv) {
44d8db9e
LP		 1858
1859 if (!first)
1860 *(p++) = ' ';
1861 else
1862 first = false;
1863
1864 if (strpbrk(*a, WHITESPACE)) {
1865 *(p++) = '\'';
1866 p = stpcpy(p, *a);
1867 *(p++) = '\'';
1868 } else
1869 p = stpcpy(p, *a);
1870
1871 }
1872
9164977d
LP		 1873 *p = 0;
1874
44d8db9e
LP		 1875 /* FIXME: this doesn't really handle arguments that have
1876 * spaces and ticks in them */
1877
1878 return n;
1879}
1880
1881void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
9fb86720
LP		 1882 char *p2;
1883 const char *prefix2;
1884
44d8db9e
LP		 1885 char *cmd;
1886
1887 assert(c);
1888 assert(f);
1889
1890 if (!prefix)
1891 prefix = "";
9fb86720
LP		 1892 p2 = strappend(prefix, "\t");
1893 prefix2 = p2 ? p2 : prefix;
44d8db9e 1894
9e2f7c11 1895 cmd = exec_command_line(c->argv);
44d8db9e
LP		 1896
1897 fprintf(f,
1898 "%sCommand Line: %s\n",
1899 prefix, cmd ? cmd : strerror(ENOMEM));
1900
1901 free(cmd);
9fb86720
LP		 1902
1903 exec_status_dump(&c->exec_status, f, prefix2);
1904
1905 free(p2);
44d8db9e
LP		 1906}
1907
1908void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
1909 assert(f);
1910
1911 if (!prefix)
1912 prefix = "";
1913
1914 LIST_FOREACH(command, c, c)
1915 exec_command_dump(c, f, prefix);
1916}
94f04347 1917
a6a80b4f
LP		 1918void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
1919 ExecCommand *end;
1920
1921 assert(l);
1922 assert(e);
1923
1924 if (*l) {
35b8ca3a 1925 /* It's kind of important, that we keep the order here */
a6a80b4f
LP		 1926 LIST_FIND_TAIL(ExecCommand, command, *l, end);
1927 LIST_INSERT_AFTER(ExecCommand, command, *l, end, e);
1928 } else
1929 *l = e;
1930}
1931
26fd040d
LP		 1932int exec_command_set(ExecCommand *c, const char *path, ...) {
1933 va_list ap;
1934 char **l, *p;
1935
1936 assert(c);
1937 assert(path);
1938
1939 va_start(ap, path);
1940 l = strv_new_ap(path, ap);
1941 va_end(ap);
1942
1943 if (!l)
1944 return -ENOMEM;
1945
1946 if (!(p = strdup(path))) {
1947 strv_free(l);
1948 return -ENOMEM;
1949 }
1950
1951 free(c->path);
1952 c->path = p;
1953
1954 strv_free(c->argv);
1955 c->argv = l;
1956
1957 return 0;
1958}
1959
80876c20
LP		 1960static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
1961 [EXEC_INPUT_NULL] = "null",
1962 [EXEC_INPUT_TTY] = "tty",
1963 [EXEC_INPUT_TTY_FORCE] = "tty-force",
4f2d528d
LP		 1964 [EXEC_INPUT_TTY_FAIL] = "tty-fail",
1965 [EXEC_INPUT_SOCKET] = "socket"
80876c20
LP		 1966};
1967
8a0867d6
LP		 1968DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
1969
94f04347 1970static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
80876c20 1971 [EXEC_OUTPUT_INHERIT] = "inherit",
94f04347 1972 [EXEC_OUTPUT_NULL] = "null",
80876c20 1973 [EXEC_OUTPUT_TTY] = "tty",
94f04347 1974 [EXEC_OUTPUT_SYSLOG] = "syslog",
28dbc1e8 1975 [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console",
9a6bca7a 1976 [EXEC_OUTPUT_KMSG] = "kmsg",
28dbc1e8 1977 [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console",
4f2d528d 1978 [EXEC_OUTPUT_SOCKET] = "socket"
94f04347
LP		 1979};
1980
1981DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
1982
8a0867d6
LP		 1983static const char* const kill_mode_table[_KILL_MODE_MAX] = {
1984 [KILL_CONTROL_GROUP] = "control-group",
8a0867d6
LP		 1985 [KILL_PROCESS] = "process",
1986 [KILL_NONE] = "none"
1987};
1988
1989DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);
1990
1991static const char* const kill_who_table[_KILL_WHO_MAX] = {
1992 [KILL_MAIN] = "main",
1993 [KILL_CONTROL] = "control",
1994 [KILL_ALL] = "all"
1995};
1996
1997DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho);
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