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Fix same expression on both sides of '&&'
[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;
346bce1f 191 strncpy(sa.un.sun_path, STDOUT_SYSLOG_BRIDGE_SOCKET, sizeof(sa.un.sun_path));
071830ff 192
346bce1f 193 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + sizeof(STDOUT_SYSLOG_BRIDGE_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
64685e0c 898 for (i = 0; i <= cap_last_cap(); i++)
73090dc8
LP		 899 if (drop & ((uint64_t) 1ULL << (uint64_t) i)) {
900 if (prctl(PR_CAPBSET_DROP, i) < 0) {
901 r = -errno;
902 goto finish;
903 }
904 }
905
906 r = 0;
907
908finish:
909 if (new_cap)
910 cap_free(new_cap);
911
912 if (old_cap) {
913 cap_set_proc(old_cap);
914 cap_free(old_cap);
915 }
916
917 return r;
918}
919
9fb86720 920int exec_spawn(ExecCommand *command,
9e2f7c11 921 char **argv,
81a2b7ce 922 const ExecContext *context,
c2748801 923 int fds[], unsigned n_fds,
1137a57c 924 char **environment,
81a2b7ce
LP		 925 bool apply_permissions,
926 bool apply_chroot,
1e3ad081 927 bool apply_tty_stdin,
80876c20 928 bool confirm_spawn,
8e274523 929 CGroupBonding *cgroup_bondings,
ab1f0633 930 CGroupAttribute *cgroup_attributes,
81a2b7ce
LP		 931 pid_t *ret) {
932
034c6ed7 933 pid_t pid;
8e274523 934 int r;
1a63a750 935 char *line;
4f2d528d 936 int socket_fd;
8c7be95e 937 char **files_env = NULL;
034c6ed7 938
5cb5a6ff
LP		 939 assert(command);
940 assert(context);
941 assert(ret);
034c6ed7
LP		 942 assert(fds || n_fds <= 0);
943
4f2d528d
LP		 944 if (context->std_input == EXEC_INPUT_SOCKET ||
945 context->std_output == EXEC_OUTPUT_SOCKET ||
946 context->std_error == EXEC_OUTPUT_SOCKET) {
947
948 if (n_fds != 1)
949 return -EINVAL;
950
951 socket_fd = fds[0];
952
953 fds = NULL;
954 n_fds = 0;
955 } else
956 socket_fd = -1;
957
8c7be95e
LP		 958 if ((r = exec_context_load_environment(context, &files_env)) < 0) {
959 log_error("Failed to load environment files: %s", strerror(-r));
960 return r;
961 }
962
9e2f7c11
LP		 963 if (!argv)
964 argv = command->argv;
965
8c7be95e
LP		 966 if (!(line = exec_command_line(argv))) {
967 r = -ENOMEM;
968 goto fail_parent;
969 }
1a63a750
LP		 970
971 log_debug("About to execute: %s", line);
972 free(line);
acbb0225 973
ab1f0633
LP		 974 r = cgroup_bonding_realize_list(cgroup_bondings);
975 if (r < 0)
976 goto fail_parent;
977
978 cgroup_attribute_apply_list(cgroup_attributes, cgroup_bondings);
8e274523 979
8c7be95e
LP		 980 if ((pid = fork()) < 0) {
981 r = -errno;
982 goto fail_parent;
983 }
034c6ed7
LP		 984
985 if (pid == 0) {
8e274523 986 int i;
309bff19 987 sigset_t ss;
81a2b7ce
LP		 988 const char *username = NULL, *home = NULL;
989 uid_t uid = (uid_t) -1;
990 gid_t gid = (gid_t) -1;
fab56fc5 991 char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL;
81a2b7ce 992 unsigned n_env = 0;
80876c20
LP		 993 int saved_stdout = -1, saved_stdin = -1;
994 bool keep_stdout = false, keep_stdin = false;
309bff19 995
034c6ed7 996 /* child */
5cb5a6ff 997
5b6319dc
LP		 998 /* This string must fit in 10 chars (i.e. the length
999 * of "/sbin/init") */
aa87e624 1000 rename_process("sd(EXEC)");
5b6319dc 1001
1b91d3e8
LP		 1002 /* We reset exactly these signals, since they are the
1003 * only ones we set to SIG_IGN in the main daemon. All
1004 * others we leave untouched because we set them to
1005 * SIG_DFL or a valid handler initially, both of which
1006 * will be demoted to SIG_DFL. */
1007 default_signals(SIGNALS_CRASH_HANDLER,
9a34ec5f 1008 SIGNALS_IGNORE, -1);
7b683879 1009
309bff19
LP		 1010 if (sigemptyset(&ss) < 0 ||
1011 sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
1012 r = EXIT_SIGNAL_MASK;
8c7be95e 1013 goto fail_child;
309bff19
LP		 1014 }
1015
85d73053
LP		 1016 /* Close sockets very early to make sure we don't
1017 * block init reexecution because it cannot bind its
1018 * sockets */
73883adc
LP		 1019 if (close_all_fds(socket_fd >= 0 ? &socket_fd : fds,
1020 socket_fd >= 0 ? 1 : n_fds) < 0) {
fc9b2a84 1021 r = EXIT_FDS;
8c7be95e 1022 goto fail_child;
fc9b2a84
LP		 1023 }
1024
74922904 1025 if (!context->same_pgrp)
8d567588
LP		 1026 if (setsid() < 0) {
1027 r = EXIT_SETSID;
8c7be95e 1028 goto fail_child;
8d567588 1029 }
80876c20 1030
c5da34ef
LP		 1031 if (context->tcpwrap_name) {
1032 if (socket_fd >= 0)
1033 if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
1034 r = EXIT_TCPWRAP;
8c7be95e 1035 goto fail_child;
c5da34ef
LP		 1036 }
1037
1038 for (i = 0; i < (int) n_fds; i++) {
1039 if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) {
1040 r = EXIT_TCPWRAP;
8c7be95e 1041 goto fail_child;
c5da34ef 1042 }
df1f0afe 1043 }
c5da34ef 1044 }
df1f0afe 1045
6ea832a2
LP		 1046 exec_context_tty_reset(context);
1047
1e3ad081
LP		 1048 /* We skip the confirmation step if we shall not apply the TTY */
1049 if (confirm_spawn &&
1050 (!is_terminal_input(context->std_input) || apply_tty_stdin)) {
80876c20
LP		 1051 char response;
1052
1053 /* Set up terminal for the question */
1054 if ((r = setup_confirm_stdio(context,
1055 &saved_stdin, &saved_stdout)))
8c7be95e 1056 goto fail_child;
80876c20
LP		 1057
1058 /* Now ask the question. */
9e2f7c11 1059 if (!(line = exec_command_line(argv))) {
80876c20 1060 r = EXIT_MEMORY;
8c7be95e 1061 goto fail_child;
ee2b4894 1062 }
80876c20
LP		 1063
1064 r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
1065 free(line);
1066
1067 if (r < 0 || response == 'n') {
1068 r = EXIT_CONFIRM;
8c7be95e 1069 goto fail_child;
80876c20
LP		 1070 } else if (response == 's') {
1071 r = 0;
8c7be95e 1072 goto fail_child;
ee2b4894 1073 }
80876c20
LP		 1074
1075 /* Release terminal for the question */
2608882f 1076 if ((r = restore_confirm_stdio(context,
80876c20
LP		 1077 &saved_stdin, &saved_stdout,
1078 &keep_stdin, &keep_stdout)))
8c7be95e 1079 goto fail_child;
034c6ed7
LP		 1080 }
1081
da726a4d
LP		 1082 /* If a socket is connected to STDIN/STDOUT/STDERR, we
1083 * must sure to drop O_NONBLOCK */
1084 if (socket_fd >= 0)
1085 fd_nonblock(socket_fd, false);
1086
80876c20 1087 if (!keep_stdin)
1e3ad081 1088 if (setup_input(context, socket_fd, apply_tty_stdin) < 0) {
80876c20 1089 r = EXIT_STDIN;
8c7be95e 1090 goto fail_child;
80876c20 1091 }
9eba9da4 1092
80876c20 1093 if (!keep_stdout)
1e3ad081 1094 if (setup_output(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
80876c20 1095 r = EXIT_STDOUT;
8c7be95e 1096 goto fail_child;
80876c20 1097 }
94f04347 1098
1e3ad081 1099 if (setup_error(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
80876c20 1100 r = EXIT_STDERR;
8c7be95e 1101 goto fail_child;
071830ff
LP		 1102 }
1103
8e274523 1104 if (cgroup_bondings)
e364ad06 1105 if (cgroup_bonding_install_list(cgroup_bondings, 0) < 0) {
8e274523 1106 r = EXIT_CGROUP;
8c7be95e 1107 goto fail_child;
8e274523
LP		 1108 }
1109
dd6c17b1 1110 if (context->oom_score_adjust_set) {
fb33a393 1111 char t[16];
034c6ed7 1112
dd6c17b1 1113 snprintf(t, sizeof(t), "%i", context->oom_score_adjust);
fb33a393 1114 char_array_0(t);
034c6ed7 1115
dd6c17b1
LP		 1116 if (write_one_line_file("/proc/self/oom_score_adj", t) < 0) {
1117 /* Compatibility with Linux <= 2.6.35 */
1118
1119 int adj;
1120
1121 adj = (context->oom_score_adjust * -OOM_DISABLE) / OOM_SCORE_ADJ_MAX;
1122 adj = CLAMP(adj, OOM_DISABLE, OOM_ADJUST_MAX);
1123
1124 snprintf(t, sizeof(t), "%i", adj);
1125 char_array_0(t);
1126
90a5f6e4
LP		 1127 if (write_one_line_file("/proc/self/oom_adj", t) < 0
1128 && errno != EACCES) {
dd6c17b1 1129 r = EXIT_OOM_ADJUST;
8c7be95e 1130 goto fail_child;
dd6c17b1 1131 }
fb33a393 1132 }
034c6ed7
LP		 1133 }
1134
fb33a393
LP		 1135 if (context->nice_set)
1136 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
1137 r = EXIT_NICE;
8c7be95e 1138 goto fail_child;
fb33a393
LP		 1139 }
1140
94f04347
LP		 1141 if (context->cpu_sched_set) {
1142 struct sched_param param;
1143
1144 zero(param);
1145 param.sched_priority = context->cpu_sched_priority;
1146
38b48754
LP		 1147 if (sched_setscheduler(0, context->cpu_sched_policy |
1148 (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), &param) < 0) {
94f04347 1149 r = EXIT_SETSCHEDULER;
8c7be95e 1150 goto fail_child;
94f04347
LP		 1151 }
1152 }
1153
82c121a4
LP		 1154 if (context->cpuset)
1155 if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) {
94f04347 1156 r = EXIT_CPUAFFINITY;
8c7be95e 1157 goto fail_child;
94f04347
LP		 1158 }
1159
9eba9da4
LP		 1160 if (context->ioprio_set)
1161 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
1162 r = EXIT_IOPRIO;
8c7be95e 1163 goto fail_child;
9eba9da4
LP		 1164 }
1165
03fae018
LP		 1166 if (context->timer_slack_nsec_set)
1167 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
94f04347 1168 r = EXIT_TIMERSLACK;
8c7be95e 1169 goto fail_child;
94f04347
LP		 1170 }
1171
169c1bda 1172 if (context->utmp_id)
0ad26e09 1173 utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path);
169c1bda 1174
81a2b7ce
LP		 1175 if (context->user) {
1176 username = context->user;
1177 if (get_user_creds(&username, &uid, &gid, &home) < 0) {
1178 r = EXIT_USER;
8c7be95e 1179 goto fail_child;
81a2b7ce 1180 }
d8b4e2e9
LP		 1181
1182 if (is_terminal_input(context->std_input))
1183 if (chown_terminal(STDIN_FILENO, uid) < 0) {
1184 r = EXIT_STDIN;
8c7be95e 1185 goto fail_child;
d8b4e2e9 1186 }
64747e2d
LP		 1187
1188 if (cgroup_bondings && context->control_group_modify)
1189 if (cgroup_bonding_set_group_access_list(cgroup_bondings, 0755, uid, gid) < 0 ||
1190 cgroup_bonding_set_task_access_list(cgroup_bondings, 0644, uid, gid) < 0) {
1191 r = EXIT_CGROUP;
1192 goto fail_child;
1193 }
81a2b7ce
LP		 1194 }
1195
3b8bddde 1196 if (apply_permissions)
fa8f36ac 1197 if (enforce_groups(context, username, gid) < 0) {
3b8bddde
LP		 1198 r = EXIT_GROUP;
1199 goto fail_child;
1200 }
1201
1202 umask(context->umask);
1203
5b6319dc
LP		 1204#ifdef HAVE_PAM
1205 if (context->pam_name && username) {
7fbf31df 1206 if (setup_pam(context->pam_name, username, context->tty_path, &pam_env, fds, n_fds) != 0) {
5b6319dc 1207 r = EXIT_PAM;
8c7be95e 1208 goto fail_child;
5b6319dc
LP		 1209 }
1210 }
1211#endif
ff01d048
LP		 1212 if (context->private_network) {
1213 if (unshare(CLONE_NEWNET) < 0) {
1214 r = EXIT_NETWORK;
1215 goto fail_child;
1216 }
1217
1218 loopback_setup();
1219 }
5b6319dc 1220
04aa0cb9
LP		 1221 if (strv_length(context->read_write_dirs) > 0 ||
1222 strv_length(context->read_only_dirs) > 0 ||
1223 strv_length(context->inaccessible_dirs) > 0 ||
1224 context->mount_flags != MS_SHARED ||
1225 context->private_tmp)
1226 if ((r = setup_namespace(
1227 context->read_write_dirs,
1228 context->read_only_dirs,
1229 context->inaccessible_dirs,
1230 context->private_tmp,
1231 context->mount_flags)) < 0)
8c7be95e 1232 goto fail_child;
04aa0cb9 1233
81a2b7ce
LP		 1234 if (apply_chroot) {
1235 if (context->root_directory)
1236 if (chroot(context->root_directory) < 0) {
1237 r = EXIT_CHROOT;
8c7be95e 1238 goto fail_child;
81a2b7ce
LP		 1239 }
1240
1241 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
1242 r = EXIT_CHDIR;
8c7be95e 1243 goto fail_child;
81a2b7ce
LP		 1244 }
1245 } else {
1246
1247 char *d;
1248
1249 if (asprintf(&d, "%s/%s",
1250 context->root_directory ? context->root_directory : "",
1251 context->working_directory ? context->working_directory : "") < 0) {
1252 r = EXIT_MEMORY;
8c7be95e 1253 goto fail_child;
81a2b7ce
LP		 1254 }
1255
1256 if (chdir(d) < 0) {
1257 free(d);
1258 r = EXIT_CHDIR;
8c7be95e 1259 goto fail_child;
81a2b7ce
LP		 1260 }
1261
1262 free(d);
1263 }
1264
fc9b2a84
LP		 1265 /* We repeat the fd closing here, to make sure that
1266 * nothing is leaked from the PAM modules */
a0d40ac5 1267 if (close_all_fds(fds, n_fds) < 0 ||
47a71eed 1268 shift_fds(fds, n_fds) < 0 ||
451a074f 1269 flags_fds(fds, n_fds, context->non_blocking) < 0) {
034c6ed7 1270 r = EXIT_FDS;
8c7be95e 1271 goto fail_child;
034c6ed7
LP		 1272 }
1273
81a2b7ce 1274 if (apply_permissions) {
034c6ed7 1275
81a2b7ce
LP		 1276 for (i = 0; i < RLIMIT_NLIMITS; i++) {
1277 if (!context->rlimit[i])
1278 continue;
1279
1280 if (setrlimit(i, context->rlimit[i]) < 0) {
1281 r = EXIT_LIMITS;
8c7be95e 1282 goto fail_child;
81a2b7ce 1283 }
034c6ed7 1284 }
034c6ed7 1285
260abb78 1286 if (context->capability_bounding_set_drop)
73090dc8
LP		 1287 if (do_capability_bounding_set_drop(context->capability_bounding_set_drop) < 0) {
1288 r = EXIT_CAPABILITIES;
1289 goto fail_child;
1290 }
260abb78 1291
81a2b7ce
LP		 1292 if (context->user)
1293 if (enforce_user(context, uid) < 0) {
1294 r = EXIT_USER;
8c7be95e 1295 goto fail_child;
81a2b7ce
LP		 1296 }
1297
35b8ca3a 1298 /* PR_GET_SECUREBITS is not privileged, while
693ced48
LP		 1299 * PR_SET_SECUREBITS is. So to suppress
1300 * potential EPERMs we'll try not to call
1301 * PR_SET_SECUREBITS unless necessary. */
1302 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
1303 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
1304 r = EXIT_SECUREBITS;
8c7be95e 1305 goto fail_child;
693ced48 1306 }
81a2b7ce
LP		 1307
1308 if (context->capabilities)
1309 if (cap_set_proc(context->capabilities) < 0) {
1310 r = EXIT_CAPABILITIES;
8c7be95e 1311 goto fail_child;
81a2b7ce 1312 }
94f04347
LP		 1313 }
1314
e3aa71c3 1315 if (!(our_env = new0(char*, 7))) {
81a2b7ce 1316 r = EXIT_MEMORY;
8c7be95e 1317 goto fail_child;
81a2b7ce 1318 }
034c6ed7 1319
81a2b7ce 1320 if (n_fds > 0)
bb00e604 1321 if (asprintf(our_env + n_env++, "LISTEN_PID=%lu", (unsigned long) getpid()) < 0 ||
81a2b7ce
LP		 1322 asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
1323 r = EXIT_MEMORY;
8c7be95e 1324 goto fail_child;
81a2b7ce 1325 }
034c6ed7 1326
81a2b7ce
LP		 1327 if (home)
1328 if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
1329 r = EXIT_MEMORY;
8c7be95e 1330 goto fail_child;
81a2b7ce 1331 }
034c6ed7 1332
81a2b7ce
LP		 1333 if (username)
1334 if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
1335 asprintf(our_env + n_env++, "USER=%s", username) < 0) {
1336 r = EXIT_MEMORY;
8c7be95e 1337 goto fail_child;
81a2b7ce 1338 }
034c6ed7 1339
e3aa71c3
LP		 1340 if (is_terminal_input(context->std_input) ||
1341 context->std_output == EXEC_OUTPUT_TTY ||
1342 context->std_error == EXEC_OUTPUT_TTY)
1343 if (!(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))) {
1344 r = EXIT_MEMORY;
8c7be95e 1345 goto fail_child;
e3aa71c3
LP		 1346 }
1347
1348 assert(n_env <= 7);
4e85aff4 1349
5b6319dc 1350 if (!(final_env = strv_env_merge(
8c7be95e 1351 5,
5b6319dc
LP		 1352 environment,
1353 our_env,
1354 context->environment,
8c7be95e 1355 files_env,
5b6319dc
LP		 1356 pam_env,
1357 NULL))) {
81a2b7ce 1358 r = EXIT_MEMORY;
8c7be95e 1359 goto fail_child;
81a2b7ce 1360 }
034c6ed7 1361
fab56fc5
LP		 1362 if (!(final_argv = replace_env_argv(argv, final_env))) {
1363 r = EXIT_MEMORY;
8c7be95e 1364 goto fail_child;
fab56fc5
LP		 1365 }
1366
a6ff950e
LP		 1367 final_env = strv_env_clean(final_env);
1368
fab56fc5 1369 execve(command->path, final_argv, final_env);
034c6ed7
LP		 1370 r = EXIT_EXEC;
1371
8c7be95e 1372 fail_child:
81a2b7ce
LP		 1373 strv_free(our_env);
1374 strv_free(final_env);
5b6319dc 1375 strv_free(pam_env);
8c7be95e 1376 strv_free(files_env);
fab56fc5 1377 strv_free(final_argv);
81a2b7ce 1378
80876c20
LP		 1379 if (saved_stdin >= 0)
1380 close_nointr_nofail(saved_stdin);
1381
1382 if (saved_stdout >= 0)
1383 close_nointr_nofail(saved_stdout);
1384
034c6ed7
LP		 1385 _exit(r);
1386 }
1387
8c7be95e
LP		 1388 strv_free(files_env);
1389
80876c20
LP		 1390 /* We add the new process to the cgroup both in the child (so
1391 * that we can be sure that no user code is ever executed
1392 * outside of the cgroup) and in the parent (so that we can be
1393 * sure that when we kill the cgroup the process will be
1394 * killed too). */
1395 if (cgroup_bondings)
4e85aff4 1396 cgroup_bonding_install_list(cgroup_bondings, pid);
2da3263a 1397
bb00e604 1398 log_debug("Forked %s as %lu", command->path, (unsigned long) pid);
2da3263a 1399
b58b4116 1400 exec_status_start(&command->exec_status, pid);
9fb86720 1401
034c6ed7 1402 *ret = pid;
5cb5a6ff 1403 return 0;
8c7be95e
LP		 1404
1405fail_parent:
1406 strv_free(files_env);
1407
1408 return r;
5cb5a6ff
LP		 1409}
1410
034c6ed7
LP		 1411void exec_context_init(ExecContext *c) {
1412 assert(c);
1413
4c12626c 1414 c->umask = 0022;
9eba9da4 1415 c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
94f04347 1416 c->cpu_sched_policy = SCHED_OTHER;
071830ff 1417 c->syslog_priority = LOG_DAEMON|LOG_INFO;
74922904 1418 c->syslog_level_prefix = true;
15ae422b 1419 c->mount_flags = MS_SHARED;
2e22afe9 1420 c->kill_signal = SIGTERM;
ba035df2 1421 c->send_sigkill = true;
034c6ed7
LP		 1422}
1423
1424void exec_context_done(ExecContext *c) {
5cb5a6ff
LP		 1425 unsigned l;
1426
1427 assert(c);
1428
1429 strv_free(c->environment);
034c6ed7 1430 c->environment = NULL;
5cb5a6ff 1431
8c7be95e
LP		 1432 strv_free(c->environment_files);
1433 c->environment_files = NULL;
1434
034c6ed7 1435 for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
5cb5a6ff 1436 free(c->rlimit[l]);
034c6ed7
LP		 1437 c->rlimit[l] = NULL;
1438 }
1439
9eba9da4
LP		 1440 free(c->working_directory);
1441 c->working_directory = NULL;
1442 free(c->root_directory);
1443 c->root_directory = NULL;
5cb5a6ff 1444
80876c20
LP		 1445 free(c->tty_path);
1446 c->tty_path = NULL;
1447
df1f0afe
LP		 1448 free(c->tcpwrap_name);
1449 c->tcpwrap_name = NULL;
1450
071830ff
LP		 1451 free(c->syslog_identifier);
1452 c->syslog_identifier = NULL;
1453
5cb5a6ff 1454 free(c->user);
034c6ed7
LP		 1455 c->user = NULL;
1456
5cb5a6ff 1457 free(c->group);
034c6ed7
LP		 1458 c->group = NULL;
1459
1460 strv_free(c->supplementary_groups);
1461 c->supplementary_groups = NULL;
94f04347 1462
5b6319dc
LP		 1463 free(c->pam_name);
1464 c->pam_name = NULL;
1465
94f04347
LP		 1466 if (c->capabilities) {
1467 cap_free(c->capabilities);
1468 c->capabilities = NULL;
1469 }
15ae422b
LP		 1470
1471 strv_free(c->read_only_dirs);
1472 c->read_only_dirs = NULL;
1473
1474 strv_free(c->read_write_dirs);
1475 c->read_write_dirs = NULL;
1476
1477 strv_free(c->inaccessible_dirs);
1478 c->inaccessible_dirs = NULL;
82c121a4
LP		 1479
1480 if (c->cpuset)
1481 CPU_FREE(c->cpuset);
86a3475b
LP		 1482
1483 free(c->utmp_id);
1484 c->utmp_id = NULL;
5cb5a6ff
LP		 1485}
1486
43d0fcbd
LP		 1487void exec_command_done(ExecCommand *c) {
1488 assert(c);
1489
1490 free(c->path);
1491 c->path = NULL;
1492
1493 strv_free(c->argv);
1494 c->argv = NULL;
1495}
1496
1497void exec_command_done_array(ExecCommand *c, unsigned n) {
1498 unsigned i;
1499
1500 for (i = 0; i < n; i++)
1501 exec_command_done(c+i);
1502}
1503
5cb5a6ff
LP		 1504void exec_command_free_list(ExecCommand *c) {
1505 ExecCommand *i;
1506
1507 while ((i = c)) {
034c6ed7 1508 LIST_REMOVE(ExecCommand, command, c, i);
43d0fcbd 1509 exec_command_done(i);
5cb5a6ff
LP		 1510 free(i);
1511 }
1512}
1513
034c6ed7
LP		 1514void exec_command_free_array(ExecCommand **c, unsigned n) {
1515 unsigned i;
1516
1517 for (i = 0; i < n; i++) {
1518 exec_command_free_list(c[i]);
1519 c[i] = NULL;
1520 }
1521}
1522
8c7be95e
LP		 1523int exec_context_load_environment(const ExecContext *c, char ***l) {
1524 char **i, **r = NULL;
1525
1526 assert(c);
1527 assert(l);
1528
1529 STRV_FOREACH(i, c->environment_files) {
1530 char *fn;
1531 int k;
1532 bool ignore = false;
1533 char **p;
1534
1535 fn = *i;
1536
1537 if (fn[0] == '-') {
1538 ignore = true;
1539 fn ++;
1540 }
1541
1542 if (!path_is_absolute(fn)) {
1543
1544 if (ignore)
1545 continue;
1546
1547 strv_free(r);
1548 return -EINVAL;
1549 }
1550
1551 if ((k = load_env_file(fn, &p)) < 0) {
1552
1553 if (ignore)
1554 continue;
1555
1556 strv_free(r);
1557 return k;
1558 }
1559
1560 if (r == NULL)
1561 r = p;
1562 else {
1563 char **m;
1564
1565 m = strv_env_merge(2, r, p);
1566 strv_free(r);
1567 strv_free(p);
1568
1569 if (!m)
1570 return -ENOMEM;
1571
1572 r = m;
1573 }
1574 }
1575
1576 *l = r;
1577
1578 return 0;
1579}
1580
15ae422b
LP		 1581static void strv_fprintf(FILE *f, char **l) {
1582 char **g;
1583
1584 assert(f);
1585
1586 STRV_FOREACH(g, l)
1587 fprintf(f, " %s", *g);
1588}
1589
5cb5a6ff 1590void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
94f04347
LP		 1591 char ** e;
1592 unsigned i;
9eba9da4 1593
5cb5a6ff
LP		 1594 assert(c);
1595 assert(f);
1596
1597 if (!prefix)
1598 prefix = "";
1599
1600 fprintf(f,
94f04347
LP		 1601 "%sUMask: %04o\n"
1602 "%sWorkingDirectory: %s\n"
451a074f 1603 "%sRootDirectory: %s\n"
15ae422b 1604 "%sNonBlocking: %s\n"
64747e2d 1605 "%sPrivateTmp: %s\n"
ff01d048
LP		 1606 "%sControlGroupModify: %s\n"
1607 "%sPrivateNetwork: %s\n",
5cb5a6ff 1608 prefix, c->umask,
9eba9da4 1609 prefix, c->working_directory ? c->working_directory : "/",
451a074f 1610 prefix, c->root_directory ? c->root_directory : "/",
15ae422b 1611 prefix, yes_no(c->non_blocking),
64747e2d 1612 prefix, yes_no(c->private_tmp),
ff01d048
LP		 1613 prefix, yes_no(c->control_group_modify),
1614 prefix, yes_no(c->private_network));
fb33a393 1615
8c7be95e
LP		 1616 STRV_FOREACH(e, c->environment)
1617 fprintf(f, "%sEnvironment: %s\n", prefix, *e);
1618
1619 STRV_FOREACH(e, c->environment_files)
1620 fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e);
94f04347 1621
df1f0afe
LP		 1622 if (c->tcpwrap_name)
1623 fprintf(f,
1624 "%sTCPWrapName: %s\n",
1625 prefix, c->tcpwrap_name);
1626
fb33a393
LP		 1627 if (c->nice_set)
1628 fprintf(f,
1629 "%sNice: %i\n",
1630 prefix, c->nice);
1631
dd6c17b1 1632 if (c->oom_score_adjust_set)
fb33a393 1633 fprintf(f,
dd6c17b1
LP		 1634 "%sOOMScoreAdjust: %i\n",
1635 prefix, c->oom_score_adjust);
9eba9da4 1636
94f04347
LP		 1637 for (i = 0; i < RLIM_NLIMITS; i++)
1638 if (c->rlimit[i])
ea430986 1639 fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
94f04347 1640
9eba9da4
LP		 1641 if (c->ioprio_set)
1642 fprintf(f,
1643 "%sIOSchedulingClass: %s\n"
1644 "%sIOPriority: %i\n",
94f04347 1645 prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
9eba9da4 1646 prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
94f04347
LP		 1647
1648 if (c->cpu_sched_set)
1649 fprintf(f,
1650 "%sCPUSchedulingPolicy: %s\n"
38b48754
LP		 1651 "%sCPUSchedulingPriority: %i\n"
1652 "%sCPUSchedulingResetOnFork: %s\n",
94f04347 1653 prefix, sched_policy_to_string(c->cpu_sched_policy),
38b48754
LP		 1654 prefix, c->cpu_sched_priority,
1655 prefix, yes_no(c->cpu_sched_reset_on_fork));
94f04347 1656
82c121a4 1657 if (c->cpuset) {
94f04347 1658 fprintf(f, "%sCPUAffinity:", prefix);
82c121a4
LP		 1659 for (i = 0; i < c->cpuset_ncpus; i++)
1660 if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset))
94f04347
LP		 1661 fprintf(f, " %i", i);
1662 fputs("\n", f);
1663 }
1664
03fae018
LP		 1665 if (c->timer_slack_nsec_set)
1666 fprintf(f, "%sTimerSlackNSec: %lu\n", prefix, c->timer_slack_nsec);
94f04347
LP		 1667
1668 fprintf(f,
80876c20
LP		 1669 "%sStandardInput: %s\n"
1670 "%sStandardOutput: %s\n"
1671 "%sStandardError: %s\n",
1672 prefix, exec_input_to_string(c->std_input),
1673 prefix, exec_output_to_string(c->std_output),
1674 prefix, exec_output_to_string(c->std_error));
1675
1676 if (c->tty_path)
1677 fprintf(f,
6ea832a2
LP		 1678 "%sTTYPath: %s\n"
1679 "%sTTYReset: %s\n"
1680 "%sTTYVHangup: %s\n"
1681 "%sTTYVTDisallocate: %s\n",
1682 prefix, c->tty_path,
1683 prefix, yes_no(c->tty_reset),
1684 prefix, yes_no(c->tty_vhangup),
1685 prefix, yes_no(c->tty_vt_disallocate));
94f04347 1686
9a6bca7a 1687 if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG ||
28dbc1e8
LP		 1688 c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
1689 c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG ||
1690 c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE)
94f04347
LP		 1691 fprintf(f,
1692 "%sSyslogFacility: %s\n"
1693 "%sSyslogLevel: %s\n",
7d76f312 1694 prefix, log_facility_unshifted_to_string(c->syslog_priority >> 3),
94f04347
LP		 1695 prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
1696
1697 if (c->capabilities) {
1698 char *t;
1699 if ((t = cap_to_text(c->capabilities, NULL))) {
1700 fprintf(f, "%sCapabilities: %s\n",
1701 prefix, t);
1702 cap_free(t);
1703 }
1704 }
1705
1706 if (c->secure_bits)
1707 fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
1708 prefix,
1709 (c->secure_bits & SECURE_KEEP_CAPS) ? " keep-caps" : "",
1710 (c->secure_bits & SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
1711 (c->secure_bits & SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
1712 (c->secure_bits & SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
1713 (c->secure_bits & SECURE_NOROOT) ? " noroot" : "",
1714 (c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
1715
1716 if (c->capability_bounding_set_drop) {
ae556c21 1717 unsigned long l;
260abb78 1718 fprintf(f, "%sCapabilityBoundingSet:", prefix);
94f04347 1719
64685e0c 1720 for (l = 0; l <= cap_last_cap(); l++)
ae556c21 1721 if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) {
94f04347
LP		 1722 char *t;
1723
ae556c21 1724 if ((t = cap_to_name(l))) {
94f04347 1725 fprintf(f, " %s", t);
260abb78 1726 cap_free(t);
94f04347
LP		 1727 }
1728 }
1729
1730 fputs("\n", f);
1731 }
1732
1733 if (c->user)
f2d3769a 1734 fprintf(f, "%sUser: %s\n", prefix, c->user);
94f04347 1735 if (c->group)
f2d3769a 1736 fprintf(f, "%sGroup: %s\n", prefix, c->group);
94f04347 1737
15ae422b 1738 if (strv_length(c->supplementary_groups) > 0) {
94f04347 1739 fprintf(f, "%sSupplementaryGroups:", prefix);
15ae422b
LP		 1740 strv_fprintf(f, c->supplementary_groups);
1741 fputs("\n", f);
1742 }
94f04347 1743
5b6319dc 1744 if (c->pam_name)
f2d3769a 1745 fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name);
5b6319dc 1746
15ae422b
LP		 1747 if (strv_length(c->read_write_dirs) > 0) {
1748 fprintf(f, "%sReadWriteDirs:", prefix);
1749 strv_fprintf(f, c->read_write_dirs);
1750 fputs("\n", f);
1751 }
1752
1753 if (strv_length(c->read_only_dirs) > 0) {
1754 fprintf(f, "%sReadOnlyDirs:", prefix);
1755 strv_fprintf(f, c->read_only_dirs);
1756 fputs("\n", f);
1757 }
94f04347 1758
15ae422b
LP		 1759 if (strv_length(c->inaccessible_dirs) > 0) {
1760 fprintf(f, "%sInaccessibleDirs:", prefix);
1761 strv_fprintf(f, c->inaccessible_dirs);
94f04347
LP		 1762 fputs("\n", f);
1763 }
2e22afe9
LP		 1764
1765 fprintf(f,
1766 "%sKillMode: %s\n"
ba035df2
LP		 1767 "%sKillSignal: SIG%s\n"
1768 "%sSendSIGKILL: %s\n",
2e22afe9 1769 prefix, kill_mode_to_string(c->kill_mode),
ba035df2
LP		 1770 prefix, signal_to_string(c->kill_signal),
1771 prefix, yes_no(c->send_sigkill));
169c1bda
LP		 1772
1773 if (c->utmp_id)
1774 fprintf(f,
1775 "%sUtmpIdentifier: %s\n",
1776 prefix, c->utmp_id);
5cb5a6ff
LP		 1777}
1778
b58b4116 1779void exec_status_start(ExecStatus *s, pid_t pid) {
034c6ed7 1780 assert(s);
5cb5a6ff 1781
b58b4116
LP		 1782 zero(*s);
1783 s->pid = pid;
1784 dual_timestamp_get(&s->start_timestamp);
1785}
1786
6ea832a2 1787void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) {
b58b4116
LP		 1788 assert(s);
1789
1790 if ((s->pid && s->pid != pid) ||
1791 !s->start_timestamp.realtime <= 0)
1792 zero(*s);
1793
034c6ed7 1794 s->pid = pid;
63983207 1795 dual_timestamp_get(&s->exit_timestamp);
9fb86720 1796
034c6ed7
LP		 1797 s->code = code;
1798 s->status = status;
169c1bda 1799
6ea832a2
LP		 1800 if (context) {
1801 if (context->utmp_id)
1802 utmp_put_dead_process(context->utmp_id, pid, code, status);
1803
1804 exec_context_tty_reset(context);
1805 }
9fb86720
LP		 1806}
1807
1808void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
1809 char buf[FORMAT_TIMESTAMP_MAX];
1810
1811 assert(s);
1812 assert(f);
1813
1814 if (!prefix)
1815 prefix = "";
1816
1817 if (s->pid <= 0)
1818 return;
1819
1820 fprintf(f,
bb00e604
LP		 1821 "%sPID: %lu\n",
1822 prefix, (unsigned long) s->pid);
9fb86720 1823
63983207 1824 if (s->start_timestamp.realtime > 0)
9fb86720
LP		 1825 fprintf(f,
1826 "%sStart Timestamp: %s\n",
63983207 1827 prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime));
9fb86720 1828
63983207 1829 if (s->exit_timestamp.realtime > 0)
9fb86720
LP		 1830 fprintf(f,
1831 "%sExit Timestamp: %s\n"
1832 "%sExit Code: %s\n"
1833 "%sExit Status: %i\n",
63983207 1834 prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime),
9fb86720
LP		 1835 prefix, sigchld_code_to_string(s->code),
1836 prefix, s->status);
5cb5a6ff 1837}
44d8db9e 1838
9e2f7c11 1839char *exec_command_line(char **argv) {
44d8db9e
LP		 1840 size_t k;
1841 char *n, *p, **a;
1842 bool first = true;
1843
9e2f7c11 1844 assert(argv);
44d8db9e 1845
9164977d 1846 k = 1;
9e2f7c11 1847 STRV_FOREACH(a, argv)
44d8db9e
LP		 1848 k += strlen(*a)+3;
1849
1850 if (!(n = new(char, k)))
1851 return NULL;
1852
1853 p = n;
9e2f7c11 1854 STRV_FOREACH(a, argv) {
44d8db9e
LP		 1855
1856 if (!first)
1857 *(p++) = ' ';
1858 else
1859 first = false;
1860
1861 if (strpbrk(*a, WHITESPACE)) {
1862 *(p++) = '\'';
1863 p = stpcpy(p, *a);
1864 *(p++) = '\'';
1865 } else
1866 p = stpcpy(p, *a);
1867
1868 }
1869
9164977d
LP		 1870 *p = 0;
1871
44d8db9e
LP		 1872 /* FIXME: this doesn't really handle arguments that have
1873 * spaces and ticks in them */
1874
1875 return n;
1876}
1877
1878void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
9fb86720
LP		 1879 char *p2;
1880 const char *prefix2;
1881
44d8db9e
LP		 1882 char *cmd;
1883
1884 assert(c);
1885 assert(f);
1886
1887 if (!prefix)
1888 prefix = "";
9fb86720
LP		 1889 p2 = strappend(prefix, "\t");
1890 prefix2 = p2 ? p2 : prefix;
44d8db9e 1891
9e2f7c11 1892 cmd = exec_command_line(c->argv);
44d8db9e
LP		 1893
1894 fprintf(f,
1895 "%sCommand Line: %s\n",
1896 prefix, cmd ? cmd : strerror(ENOMEM));
1897
1898 free(cmd);
9fb86720
LP		 1899
1900 exec_status_dump(&c->exec_status, f, prefix2);
1901
1902 free(p2);
44d8db9e
LP		 1903}
1904
1905void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
1906 assert(f);
1907
1908 if (!prefix)
1909 prefix = "";
1910
1911 LIST_FOREACH(command, c, c)
1912 exec_command_dump(c, f, prefix);
1913}
94f04347 1914
a6a80b4f
LP		 1915void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
1916 ExecCommand *end;
1917
1918 assert(l);
1919 assert(e);
1920
1921 if (*l) {
35b8ca3a 1922 /* It's kind of important, that we keep the order here */
a6a80b4f
LP		 1923 LIST_FIND_TAIL(ExecCommand, command, *l, end);
1924 LIST_INSERT_AFTER(ExecCommand, command, *l, end, e);
1925 } else
1926 *l = e;
1927}
1928
26fd040d
LP		 1929int exec_command_set(ExecCommand *c, const char *path, ...) {
1930 va_list ap;
1931 char **l, *p;
1932
1933 assert(c);
1934 assert(path);
1935
1936 va_start(ap, path);
1937 l = strv_new_ap(path, ap);
1938 va_end(ap);
1939
1940 if (!l)
1941 return -ENOMEM;
1942
1943 if (!(p = strdup(path))) {
1944 strv_free(l);
1945 return -ENOMEM;
1946 }
1947
1948 free(c->path);
1949 c->path = p;
1950
1951 strv_free(c->argv);
1952 c->argv = l;
1953
1954 return 0;
1955}
1956
80876c20
LP		 1957static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
1958 [EXEC_INPUT_NULL] = "null",
1959 [EXEC_INPUT_TTY] = "tty",
1960 [EXEC_INPUT_TTY_FORCE] = "tty-force",
4f2d528d
LP		 1961 [EXEC_INPUT_TTY_FAIL] = "tty-fail",
1962 [EXEC_INPUT_SOCKET] = "socket"
80876c20
LP		 1963};
1964
8a0867d6
LP		 1965DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
1966
94f04347 1967static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
80876c20 1968 [EXEC_OUTPUT_INHERIT] = "inherit",
94f04347 1969 [EXEC_OUTPUT_NULL] = "null",
80876c20 1970 [EXEC_OUTPUT_TTY] = "tty",
94f04347 1971 [EXEC_OUTPUT_SYSLOG] = "syslog",
28dbc1e8 1972 [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console",
9a6bca7a 1973 [EXEC_OUTPUT_KMSG] = "kmsg",
28dbc1e8 1974 [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console",
4f2d528d 1975 [EXEC_OUTPUT_SOCKET] = "socket"
94f04347
LP		 1976};
1977
1978DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
1979
8a0867d6
LP		 1980static const char* const kill_mode_table[_KILL_MODE_MAX] = {
1981 [KILL_CONTROL_GROUP] = "control-group",
8a0867d6
LP		 1982 [KILL_PROCESS] = "process",
1983 [KILL_NONE] = "none"
1984};
1985
1986DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);
1987
1988static const char* const kill_who_table[_KILL_WHO_MAX] = {
1989 [KILL_MAIN] = "main",
1990 [KILL_CONTROL] = "control",
1991 [KILL_ALL] = "all"
1992};
1993
1994DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho);
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