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