]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/core/execute.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
build-sys: prefer using ln --relative -s where appropriate
[thirdparty/systemd.git] / src / core / execute.c
CommitLineData
d6c9574f 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
5cb5a6ff 2
a7334b09
LP		 3/***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
5430f7f2
LP		 9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
a7334b09
LP		 11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5430f7f2 16 Lesser General Public License for more details.
a7334b09 17
5430f7f2 18 You should have received a copy of the GNU Lesser General Public License
a7334b09
LP		 19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
5cb5a6ff 22#include <assert.h>
034c6ed7
LP		 23#include <dirent.h>
24#include <errno.h>
25#include <fcntl.h>
26#include <unistd.h>
44d8db9e 27#include <string.h>
309bff19 28#include <signal.h>
071830ff
LP		 29#include <sys/socket.h>
30#include <sys/un.h>
94f04347 31#include <sys/prctl.h>
66ee3769 32#include <linux/sched.h>
451a074f
LP		 33#include <sys/types.h>
34#include <sys/stat.h>
81a2b7ce
LP		 35#include <grp.h>
36#include <pwd.h>
15ae422b 37#include <sys/mount.h>
25e870b5 38#include <linux/fs.h>
dd6c17b1 39#include <linux/oom.h>
f2b68789 40#include <sys/poll.h>
2bef10ab 41#include <glob.h>
ac45f971 42#include <sys/personality.h>
d34cd374 43#include <libgen.h>
2b6bf07d 44#undef basename
5cb5a6ff 45
5b6319dc
LP		 46#ifdef HAVE_PAM
47#include <security/pam_appl.h>
48#endif
49
7b52a628
MS		 50#ifdef HAVE_SELINUX
51#include <selinux/selinux.h>
52#endif
53
17df7223
LP		 54#ifdef HAVE_SECCOMP
55#include <seccomp.h>
56#endif
57
eef65bf3
MS		 58#ifdef HAVE_APPARMOR
59#include <sys/apparmor.h>
60#endif
61
5cb5a6ff
LP		 62#include "execute.h"
63#include "strv.h"
64#include "macro.h"
d7832d2c 65#include "capability.h"
5cb5a6ff 66#include "util.h"
acbb0225 67#include "log.h"
20ad4cfd 68#include "sd-messages.h"
9eba9da4 69#include "ioprio.h"
94f04347 70#include "securebits.h"
15ae422b 71#include "namespace.h"
df1f0afe 72#include "tcpwrap.h"
d06dacd0 73#include "exit-status.h"
dd6c17b1 74#include "missing.h"
169c1bda 75#include "utmp-wtmp.h"
f6a6225e 76#include "def.h"
9eb977db 77#include "path-util.h"
4d1a6904 78#include "env-util.h"
a5c32cff 79#include "fileio.h"
4ad49000 80#include "unit.h"
f485606b 81#include "async.h"
0d3f7bb3 82#include "selinux-util.h"
17df7223 83#include "errno-list.h"
4298d0b5 84#include "af-list.h"
eef65bf3 85#include "apparmor-util.h"
5cb5a6ff 86
57183d11
LP		 87#ifdef HAVE_SECCOMP
88#include "seccomp-util.h"
89#endif
90
e056b01d 91#define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC)
31a7eb86 92#define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC)
e6a26745 93
02a51aba
LP		 94/* This assumes there is a 'tty' group */
95#define TTY_MODE 0620
96
531dca78
LP		 97#define SNDBUF_SIZE (8*1024*1024)
98
034c6ed7
LP		 99static int shift_fds(int fds[], unsigned n_fds) {
100 int start, restart_from;
101
102 if (n_fds <= 0)
103 return 0;
104
a0d40ac5
LP		 105 /* Modifies the fds array! (sorts it) */
106
034c6ed7
LP		 107 assert(fds);
108
109 start = 0;
110 for (;;) {
111 int i;
112
113 restart_from = -1;
114
115 for (i = start; i < (int) n_fds; i++) {
116 int nfd;
117
118 /* Already at right index? */
119 if (fds[i] == i+3)
120 continue;
121
122 if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0)
123 return -errno;
124
e1f5e051 125 close_nointr_nofail(fds[i]);
034c6ed7
LP		 126 fds[i] = nfd;
127
128 /* Hmm, the fd we wanted isn't free? Then
129 * let's remember that and try again from here*/
130 if (nfd != i+3 && restart_from < 0)
131 restart_from = i;
132 }
133
134 if (restart_from < 0)
135 break;
136
137 start = restart_from;
138 }
139
140 return 0;
141}
142
c2748801 143static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) {
47a71eed 144 unsigned i;
e2c76839 145 int r;
47a71eed
LP		 146
147 if (n_fds <= 0)
148 return 0;
149
150 assert(fds);
151
451a074f 152 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
47a71eed
LP		 153
154 for (i = 0; i < n_fds; i++) {
47a71eed 155
e2c76839
LP		 156 if ((r = fd_nonblock(fds[i], nonblock)) < 0)
157 return r;
47a71eed 158
451a074f
LP		 159 /* We unconditionally drop FD_CLOEXEC from the fds,
160 * since after all we want to pass these fds to our
161 * children */
47a71eed 162
e2c76839
LP		 163 if ((r = fd_cloexec(fds[i], false)) < 0)
164 return r;
47a71eed
LP		 165 }
166
167 return 0;
168}
169
44a6b1b6 170_pure_ static const char *tty_path(const ExecContext *context) {
80876c20
LP		 171 assert(context);
172
173 if (context->tty_path)
174 return context->tty_path;
175
176 return "/dev/console";
177}
178
9588bc32 179static void exec_context_tty_reset(const ExecContext *context) {
6ea832a2
LP		 180 assert(context);
181
182 if (context->tty_vhangup)
183 terminal_vhangup(tty_path(context));
184
185 if (context->tty_reset)
186 reset_terminal(tty_path(context));
187
188 if (context->tty_vt_disallocate && context->tty_path)
189 vt_disallocate(context->tty_path);
190}
191
3a1286b6
MS		 192static bool is_terminal_output(ExecOutput o) {
193 return
194 o == EXEC_OUTPUT_TTY ||
195 o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE ||
196 o == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
197 o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE;
198}
199
80876c20
LP		 200static int open_null_as(int flags, int nfd) {
201 int fd, r;
071830ff 202
80876c20 203 assert(nfd >= 0);
071830ff 204
613b411c
LP		 205 fd = open("/dev/null", flags|O_NOCTTY);
206 if (fd < 0)
071830ff
LP		 207 return -errno;
208
80876c20
LP		 209 if (fd != nfd) {
210 r = dup2(fd, nfd) < 0 ? -errno : nfd;
e1f5e051 211 close_nointr_nofail(fd);
80876c20
LP		 212 } else
213 r = nfd;
071830ff 214
80876c20 215 return r;
071830ff
LP		 216}
217
62bca2c6 218static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, const char *unit_id, int nfd) {
80876c20 219 int fd, r;
b92bea5d
ZJS		 220 union sockaddr_union sa = {
221 .un.sun_family = AF_UNIX,
222 .un.sun_path = "/run/systemd/journal/stdout",
223 };
071830ff
LP		 224
225 assert(context);
80876c20
LP		 226 assert(output < _EXEC_OUTPUT_MAX);
227 assert(ident);
228 assert(nfd >= 0);
071830ff 229
54fe0cdb
LP		 230 fd = socket(AF_UNIX, SOCK_STREAM, 0);
231 if (fd < 0)
80876c20 232 return -errno;
071830ff 233
54fe0cdb
LP		 234 r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));
235 if (r < 0) {
80876c20
LP		 236 close_nointr_nofail(fd);
237 return -errno;
238 }
071830ff 239
80876c20
LP		 240 if (shutdown(fd, SHUT_RD) < 0) {
241 close_nointr_nofail(fd);
242 return -errno;
243 }
071830ff 244
531dca78
LP		 245 fd_inc_sndbuf(fd, SNDBUF_SIZE);
246
80876c20 247 dprintf(fd,
62bca2c6 248 "%s\n"
80876c20
LP		 249 "%s\n"
250 "%i\n"
54fe0cdb
LP		 251 "%i\n"
252 "%i\n"
253 "%i\n"
4f4a1dbf 254 "%i\n",
4f4a1dbf 255 context->syslog_identifier ? context->syslog_identifier : ident,
62bca2c6 256 unit_id,
54fe0cdb
LP		 257 context->syslog_priority,
258 !!context->syslog_level_prefix,
259 output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE,
260 output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE,
3a1286b6 261 is_terminal_output(output));
80876c20
LP		 262
263 if (fd != nfd) {
264 r = dup2(fd, nfd) < 0 ? -errno : nfd;
e1f5e051 265 close_nointr_nofail(fd);
80876c20
LP		 266 } else
267 r = nfd;
071830ff 268
80876c20
LP		 269 return r;
270}
271static int open_terminal_as(const char *path, mode_t mode, int nfd) {
272 int fd, r;
071830ff 273
80876c20
LP		 274 assert(path);
275 assert(nfd >= 0);
071830ff 276
80876c20
LP		 277 if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0)
278 return fd;
071830ff 279
80876c20
LP		 280 if (fd != nfd) {
281 r = dup2(fd, nfd) < 0 ? -errno : nfd;
282 close_nointr_nofail(fd);
283 } else
284 r = nfd;
071830ff 285
80876c20
LP		 286 return r;
287}
071830ff 288
80876c20
LP		 289static bool is_terminal_input(ExecInput i) {
290 return
291 i == EXEC_INPUT_TTY ||
292 i == EXEC_INPUT_TTY_FORCE ||
293 i == EXEC_INPUT_TTY_FAIL;
294}
071830ff 295
1e3ad081
LP		 296static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) {
297
298 if (is_terminal_input(std_input) && !apply_tty_stdin)
299 return EXEC_INPUT_NULL;
071830ff 300
03fd9c49 301 if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0)
4f2d528d
LP		 302 return EXEC_INPUT_NULL;
303
03fd9c49 304 return std_input;
4f2d528d
LP		 305}
306
03fd9c49 307static int fixup_output(ExecOutput std_output, int socket_fd) {
4f2d528d 308
03fd9c49 309 if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0)
4f2d528d
LP		 310 return EXEC_OUTPUT_INHERIT;
311
03fd9c49 312 return std_output;
4f2d528d
LP		 313}
314
1e3ad081 315static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) {
4f2d528d
LP		 316 ExecInput i;
317
318 assert(context);
319
1e3ad081 320 i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
4f2d528d
LP		 321
322 switch (i) {
071830ff 323
80876c20
LP		 324 case EXEC_INPUT_NULL:
325 return open_null_as(O_RDONLY, STDIN_FILENO);
326
327 case EXEC_INPUT_TTY:
328 case EXEC_INPUT_TTY_FORCE:
329 case EXEC_INPUT_TTY_FAIL: {
330 int fd, r;
071830ff 331
970edce6
ZJS		 332 fd = acquire_terminal(tty_path(context),
333 i == EXEC_INPUT_TTY_FAIL,
334 i == EXEC_INPUT_TTY_FORCE,
335 false,
336 (usec_t) -1);
337 if (fd < 0)
80876c20
LP		 338 return fd;
339
340 if (fd != STDIN_FILENO) {
341 r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
071830ff 342 close_nointr_nofail(fd);
80876c20
LP		 343 } else
344 r = STDIN_FILENO;
345
346 return r;
347 }
348
4f2d528d
LP		 349 case EXEC_INPUT_SOCKET:
350 return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
351
80876c20
LP		 352 default:
353 assert_not_reached("Unknown input type");
354 }
355}
356
eb17e935 357static int setup_output(const ExecContext *context, int fileno, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin) {
4f2d528d
LP		 358 ExecOutput o;
359 ExecInput i;
47c1d80d 360 int r;
4f2d528d 361
80876c20
LP		 362 assert(context);
363 assert(ident);
364
1e3ad081 365 i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
03fd9c49 366 o = fixup_output(context->std_output, socket_fd);
4f2d528d 367
eb17e935
MS		 368 if (fileno == STDERR_FILENO) {
369 ExecOutput e;
370 e = fixup_output(context->std_error, socket_fd);
80876c20 371
eb17e935
MS		 372 /* This expects the input and output are already set up */
373
374 /* Don't change the stderr file descriptor if we inherit all
375 * the way and are not on a tty */
376 if (e == EXEC_OUTPUT_INHERIT &&
377 o == EXEC_OUTPUT_INHERIT &&
378 i == EXEC_INPUT_NULL &&
379 !is_terminal_input(context->std_input) &&
380 getppid () != 1)
381 return fileno;
382
383 /* Duplicate from stdout if possible */
384 if (e == o || e == EXEC_OUTPUT_INHERIT)
385 return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno;
071830ff 386
eb17e935 387 o = e;
80876c20 388
eb17e935 389 } else if (o == EXEC_OUTPUT_INHERIT) {
21d21ea4
LP		 390 /* If input got downgraded, inherit the original value */
391 if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input))
eb17e935 392 return open_terminal_as(tty_path(context), O_WRONLY, fileno);
21d21ea4 393
acb591e4 394 /* If the input is connected to anything that's not a /dev/null, inherit that... */
ff876e28 395 if (i != EXEC_INPUT_NULL)
eb17e935 396 return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno;
071830ff 397
acb591e4
LP		 398 /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */
399 if (getppid() != 1)
eb17e935 400 return fileno;
94f04347 401
eb17e935
MS		 402 /* We need to open /dev/null here anew, to get the right access mode. */
403 return open_null_as(O_WRONLY, fileno);
071830ff 404 }
94f04347 405
eb17e935 406 switch (o) {
80876c20
LP		 407
408 case EXEC_OUTPUT_NULL:
eb17e935 409 return open_null_as(O_WRONLY, fileno);
80876c20
LP		 410
411 case EXEC_OUTPUT_TTY:
4f2d528d 412 if (is_terminal_input(i))
eb17e935 413 return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno;
80876c20
LP		 414
415 /* We don't reset the terminal if this is just about output */
eb17e935 416 return open_terminal_as(tty_path(context), O_WRONLY, fileno);
80876c20
LP		 417
418 case EXEC_OUTPUT_SYSLOG:
28dbc1e8 419 case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
9a6bca7a 420 case EXEC_OUTPUT_KMSG:
28dbc1e8 421 case EXEC_OUTPUT_KMSG_AND_CONSOLE:
706343f4
LP		 422 case EXEC_OUTPUT_JOURNAL:
423 case EXEC_OUTPUT_JOURNAL_AND_CONSOLE:
eb17e935 424 r = connect_logger_as(context, o, ident, unit_id, fileno);
47c1d80d 425 if (r < 0) {
80cbda35
MS		 426 log_struct_unit(LOG_CRIT, unit_id,
427 "MESSAGE=Failed to connect std%s of %s to the journal socket: %s",
eb17e935 428 fileno == STDOUT_FILENO ? "out" : "err",
80cbda35
MS		 429 unit_id, strerror(-r),
430 "ERRNO=%d", -r,
431 NULL);
eb17e935 432 r = open_null_as(O_WRONLY, fileno);
47c1d80d
MS		 433 }
434 return r;
4f2d528d
LP		 435
436 case EXEC_OUTPUT_SOCKET:
437 assert(socket_fd >= 0);
eb17e935 438 return dup2(socket_fd, fileno) < 0 ? -errno : fileno;
94f04347
LP		 439
440 default:
80876c20 441 assert_not_reached("Unknown error type");
94f04347 442 }
071830ff
LP		 443}
444
02a51aba
LP		 445static int chown_terminal(int fd, uid_t uid) {
446 struct stat st;
447
448 assert(fd >= 0);
02a51aba
LP		 449
450 /* This might fail. What matters are the results. */
bab45044
LP		 451 (void) fchown(fd, uid, -1);
452 (void) fchmod(fd, TTY_MODE);
02a51aba
LP		 453
454 if (fstat(fd, &st) < 0)
455 return -errno;
456
d8b4e2e9 457 if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE)
02a51aba
LP		 458 return -EPERM;
459
460 return 0;
461}
462
af6da548 463static int setup_confirm_stdio(int *_saved_stdin,
80876c20
LP		 464 int *_saved_stdout) {
465 int fd = -1, saved_stdin, saved_stdout = -1, r;
466
80876c20
LP		 467 assert(_saved_stdin);
468 assert(_saved_stdout);
469
af6da548
LP		 470 saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3);
471 if (saved_stdin < 0)
472 return -errno;
80876c20 473
af6da548
LP		 474 saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3);
475 if (saved_stdout < 0) {
476 r = errno;
80876c20
LP		 477 goto fail;
478 }
479
af6da548
LP		 480 fd = acquire_terminal(
481 "/dev/console",
482 false,
483 false,
484 false,
485 DEFAULT_CONFIRM_USEC);
486 if (fd < 0) {
487 r = fd;
80876c20
LP		 488 goto fail;
489 }
490
af6da548
LP		 491 r = chown_terminal(fd, getuid());
492 if (r < 0)
02a51aba 493 goto fail;
02a51aba 494
80876c20 495 if (dup2(fd, STDIN_FILENO) < 0) {
af6da548 496 r = -errno;
80876c20
LP		 497 goto fail;
498 }
499
500 if (dup2(fd, STDOUT_FILENO) < 0) {
af6da548 501 r = -errno;
80876c20
LP		 502 goto fail;
503 }
504
505 if (fd >= 2)
506 close_nointr_nofail(fd);
507
508 *_saved_stdin = saved_stdin;
509 *_saved_stdout = saved_stdout;
510
511 return 0;
512
513fail:
514 if (saved_stdout >= 0)
515 close_nointr_nofail(saved_stdout);
516
517 if (saved_stdin >= 0)
518 close_nointr_nofail(saved_stdin);
519
520 if (fd >= 0)
521 close_nointr_nofail(fd);
522
523 return r;
524}
525
44b601bc 526_printf_(1, 2) static int write_confirm_message(const char *format, ...) {
af6da548
LP		 527 int fd;
528 va_list ap;
80876c20 529
af6da548 530 assert(format);
80876c20 531
af6da548
LP		 532 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
533 if (fd < 0)
534 return fd;
80876c20 535
af6da548
LP		 536 va_start(ap, format);
537 vdprintf(fd, format, ap);
538 va_end(ap);
80876c20 539
af6da548 540 close_nointr_nofail(fd);
80876c20 541
af6da548
LP		 542 return 0;
543}
80876c20 544
af6da548
LP		 545static int restore_confirm_stdio(int *saved_stdin,
546 int *saved_stdout) {
80876c20 547
af6da548 548 int r = 0;
80876c20 549
af6da548
LP		 550 assert(saved_stdin);
551 assert(saved_stdout);
552
553 release_terminal();
554
555 if (*saved_stdin >= 0)
80876c20 556 if (dup2(*saved_stdin, STDIN_FILENO) < 0)
af6da548 557 r = -errno;
80876c20 558
af6da548 559 if (*saved_stdout >= 0)
80876c20 560 if (dup2(*saved_stdout, STDOUT_FILENO) < 0)
af6da548 561 r = -errno;
80876c20 562
af6da548
LP		 563 if (*saved_stdin >= 0)
564 close_nointr_nofail(*saved_stdin);
80876c20 565
af6da548
LP		 566 if (*saved_stdout >= 0)
567 close_nointr_nofail(*saved_stdout);
568
569 return r;
570}
571
572static int ask_for_confirmation(char *response, char **argv) {
573 int saved_stdout = -1, saved_stdin = -1, r;
574 char *line;
575
576 r = setup_confirm_stdio(&saved_stdin, &saved_stdout);
577 if (r < 0)
578 return r;
579
580 line = exec_command_line(argv);
581 if (!line)
582 return -ENOMEM;
583
584 r = ask(response, "yns", "Execute %s? [Yes, No, Skip] ", line);
585 free(line);
586
587 restore_confirm_stdio(&saved_stdin, &saved_stdout);
588
589 return r;
80876c20
LP		 590}
591
81a2b7ce
LP		 592static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) {
593 bool keep_groups = false;
594 int r;
595
596 assert(context);
597
35b8ca3a 598 /* Lookup and set GID and supplementary group list. Here too
81a2b7ce
LP		 599 * we avoid NSS lookups for gid=0. */
600
601 if (context->group || username) {
602
4b67834e
LP		 603 if (context->group) {
604 const char *g = context->group;
605
606 if ((r = get_group_creds(&g, &gid)) < 0)
81a2b7ce 607 return r;
4b67834e 608 }
81a2b7ce
LP		 609
610 /* First step, initialize groups from /etc/groups */
611 if (username && gid != 0) {
612 if (initgroups(username, gid) < 0)
613 return -errno;
614
615 keep_groups = true;
616 }
617
618 /* Second step, set our gids */
619 if (setresgid(gid, gid, gid) < 0)
620 return -errno;
621 }
622
623 if (context->supplementary_groups) {
624 int ngroups_max, k;
625 gid_t *gids;
626 char **i;
627
628 /* Final step, initialize any manually set supplementary groups */
da19d5c1 629 assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0);
81a2b7ce
LP		 630
631 if (!(gids = new(gid_t, ngroups_max)))
632 return -ENOMEM;
633
634 if (keep_groups) {
635 if ((k = getgroups(ngroups_max, gids)) < 0) {
636 free(gids);
637 return -errno;
638 }
639 } else
640 k = 0;
641
642 STRV_FOREACH(i, context->supplementary_groups) {
4b67834e 643 const char *g;
81a2b7ce
LP		 644
645 if (k >= ngroups_max) {
646 free(gids);
647 return -E2BIG;
648 }
649
4b67834e
LP		 650 g = *i;
651 r = get_group_creds(&g, gids+k);
652 if (r < 0) {
81a2b7ce
LP		 653 free(gids);
654 return r;
655 }
656
657 k++;
658 }
659
660 if (setgroups(k, gids) < 0) {
661 free(gids);
662 return -errno;
663 }
664
665 free(gids);
666 }
667
668 return 0;
669}
670
671static int enforce_user(const ExecContext *context, uid_t uid) {
81a2b7ce
LP		 672 assert(context);
673
674 /* Sets (but doesn't lookup) the uid and make sure we keep the
675 * capabilities while doing so. */
676
677 if (context->capabilities) {
5ce70e5b 678 _cleanup_cap_free_ cap_t d = NULL;
81a2b7ce
LP		 679 static const cap_value_t bits[] = {
680 CAP_SETUID, /* Necessary so that we can run setresuid() below */
681 CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */
682 };
683
684 /* First step: If we need to keep capabilities but
685 * drop privileges we need to make sure we keep our
cbb21cca 686 * caps, while we drop privileges. */
693ced48 687 if (uid != 0) {
cbb21cca 688 int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS;
693ced48
LP		 689
690 if (prctl(PR_GET_SECUREBITS) != sb)
691 if (prctl(PR_SET_SECUREBITS, sb) < 0)
692 return -errno;
693 }
81a2b7ce 694
35b8ca3a 695 /* Second step: set the capabilities. This will reduce
81a2b7ce
LP		 696 * the capabilities to the minimum we need. */
697
5ce70e5b
ZJS		 698 d = cap_dup(context->capabilities);
699 if (!d)
81a2b7ce
LP		 700 return -errno;
701
702 if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 ||
5ce70e5b
ZJS		 703 cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0)
704 return -errno;
81a2b7ce 705
5ce70e5b
ZJS		 706 if (cap_set_proc(d) < 0)
707 return -errno;
81a2b7ce
LP		 708 }
709
710 /* Third step: actually set the uids */
711 if (setresuid(uid, uid, uid) < 0)
712 return -errno;
713
714 /* At this point we should have all necessary capabilities but
715 are otherwise a normal user. However, the caps might got
716 corrupted due to the setresuid() so we need clean them up
717 later. This is done outside of this call. */
718
719 return 0;
720}
721
5b6319dc
LP		 722#ifdef HAVE_PAM
723
724static int null_conv(
725 int num_msg,
726 const struct pam_message **msg,
727 struct pam_response **resp,
728 void *appdata_ptr) {
729
730 /* We don't support conversations */
731
732 return PAM_CONV_ERR;
733}
734
735static int setup_pam(
736 const char *name,
737 const char *user,
940c5210 738 uid_t uid,
5b6319dc
LP		 739 const char *tty,
740 char ***pam_env,
741 int fds[], unsigned n_fds) {
742
743 static const struct pam_conv conv = {
744 .conv = null_conv,
745 .appdata_ptr = NULL
746 };
747
748 pam_handle_t *handle = NULL;
749 sigset_t ss, old_ss;
750 int pam_code = PAM_SUCCESS;
9ba35398 751 int err;
5b6319dc
LP		 752 char **e = NULL;
753 bool close_session = false;
754 pid_t pam_pid = 0, parent_pid;
970edce6 755 int flags = 0;
5b6319dc
LP		 756
757 assert(name);
758 assert(user);
759 assert(pam_env);
760
761 /* We set up PAM in the parent process, then fork. The child
35b8ca3a 762 * will then stay around until killed via PR_GET_PDEATHSIG or
5b6319dc
LP		 763 * systemd via the cgroup logic. It will then remove the PAM
764 * session again. The parent process will exec() the actual
765 * daemon. We do things this way to ensure that the main PID
766 * of the daemon is the one we initially fork()ed. */
767
970edce6
ZJS		 768 if (log_get_max_level() < LOG_PRI(LOG_DEBUG))
769 flags |= PAM_SILENT;
770
f546241b
ZJS		 771 pam_code = pam_start(name, user, &conv, &handle);
772 if (pam_code != PAM_SUCCESS) {
5b6319dc
LP		 773 handle = NULL;
774 goto fail;
775 }
776
f546241b
ZJS		 777 if (tty) {
778 pam_code = pam_set_item(handle, PAM_TTY, tty);
779 if (pam_code != PAM_SUCCESS)
5b6319dc 780 goto fail;
f546241b 781 }
5b6319dc 782
970edce6 783 pam_code = pam_acct_mgmt(handle, flags);
f546241b 784 if (pam_code != PAM_SUCCESS)
5b6319dc
LP		 785 goto fail;
786
970edce6 787 pam_code = pam_open_session(handle, flags);
f546241b 788 if (pam_code != PAM_SUCCESS)
5b6319dc
LP		 789 goto fail;
790
791 close_session = true;
792
f546241b
ZJS		 793 e = pam_getenvlist(handle);
794 if (!e) {
5b6319dc
LP		 795 pam_code = PAM_BUF_ERR;
796 goto fail;
797 }
798
799 /* Block SIGTERM, so that we know that it won't get lost in
800 * the child */
801 if (sigemptyset(&ss) < 0 ||
802 sigaddset(&ss, SIGTERM) < 0 ||
803 sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0)
804 goto fail;
805
806 parent_pid = getpid();
807
f546241b
ZJS		 808 pam_pid = fork();
809 if (pam_pid < 0)
5b6319dc
LP		 810 goto fail;
811
812 if (pam_pid == 0) {
813 int sig;
814 int r = EXIT_PAM;
815
816 /* The child's job is to reset the PAM session on
817 * termination */
818
819 /* This string must fit in 10 chars (i.e. the length
5d6b1584
LP		 820 * of "/sbin/init"), to look pretty in /bin/ps */
821 rename_process("(sd-pam)");
5b6319dc
LP		 822
823 /* Make sure we don't keep open the passed fds in this
824 child. We assume that otherwise only those fds are
825 open here that have been opened by PAM. */
826 close_many(fds, n_fds);
827
940c5210
AK		 828 /* Drop privileges - we don't need any to pam_close_session
829 * and this will make PR_SET_PDEATHSIG work in most cases.
830 * If this fails, ignore the error - but expect sd-pam threads
831 * to fail to exit normally */
832 if (setresuid(uid, uid, uid) < 0)
833 log_error("Error: Failed to setresuid() in sd-pam: %s", strerror(-r));
834
835 /* Wait until our parent died. This will only work if
836 * the above setresuid() succeeds, otherwise the kernel
837 * will not allow unprivileged parents kill their privileged
838 * children this way. We rely on the control groups kill logic
5b6319dc
LP		 839 * to do the rest for us. */
840 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
841 goto child_finish;
842
843 /* Check if our parent process might already have
844 * died? */
845 if (getppid() == parent_pid) {
3dead8d9
LP		 846 for (;;) {
847 if (sigwait(&ss, &sig) < 0) {
848 if (errno == EINTR)
849 continue;
850
851 goto child_finish;
852 }
5b6319dc 853
3dead8d9
LP		 854 assert(sig == SIGTERM);
855 break;
856 }
5b6319dc
LP		 857 }
858
3dead8d9 859 /* If our parent died we'll end the session */
f546241b 860 if (getppid() != parent_pid) {
970edce6 861 pam_code = pam_close_session(handle, flags);
f546241b 862 if (pam_code != PAM_SUCCESS)
5b6319dc 863 goto child_finish;
f546241b 864 }
5b6319dc
LP		 865
866 r = 0;
867
868 child_finish:
970edce6 869 pam_end(handle, pam_code | flags);
5b6319dc
LP		 870 _exit(r);
871 }
872
873 /* If the child was forked off successfully it will do all the
874 * cleanups, so forget about the handle here. */
875 handle = NULL;
876
3b8bddde 877 /* Unblock SIGTERM again in the parent */
5b6319dc
LP		 878 if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0)
879 goto fail;
880
881 /* We close the log explicitly here, since the PAM modules
882 * might have opened it, but we don't want this fd around. */
883 closelog();
884
aa87e624
LP		 885 *pam_env = e;
886 e = NULL;
887
5b6319dc
LP		 888 return 0;
889
890fail:
970edce6
ZJS		 891 if (pam_code != PAM_SUCCESS) {
892 log_error("PAM failed: %s", pam_strerror(handle, pam_code));
9ba35398 893 err = -EPERM; /* PAM errors do not map to errno */
970edce6
ZJS		 894 } else {
895 log_error("PAM failed: %m");
9ba35398 896 err = -errno;
970edce6 897 }
9ba35398 898
5b6319dc
LP		 899 if (handle) {
900 if (close_session)
970edce6 901 pam_code = pam_close_session(handle, flags);
5b6319dc 902
970edce6 903 pam_end(handle, pam_code | flags);
5b6319dc
LP		 904 }
905
906 strv_free(e);
907
908 closelog();
909
430c18ed 910 if (pam_pid > 1) {
5b6319dc 911 kill(pam_pid, SIGTERM);
430c18ed
LP		 912 kill(pam_pid, SIGCONT);
913 }
5b6319dc 914
9ba35398 915 return err;
5b6319dc
LP		 916}
917#endif
918
5d6b1584
LP		 919static void rename_process_from_path(const char *path) {
920 char process_name[11];
921 const char *p;
922 size_t l;
923
924 /* This resulting string must fit in 10 chars (i.e. the length
925 * of "/sbin/init") to look pretty in /bin/ps */
926
2b6bf07d 927 p = basename(path);
5d6b1584
LP		 928 if (isempty(p)) {
929 rename_process("(...)");
930 return;
931 }
932
933 l = strlen(p);
934 if (l > 8) {
935 /* The end of the process name is usually more
936 * interesting, since the first bit might just be
937 * "systemd-" */
938 p = p + l - 8;
939 l = 8;
940 }
941
942 process_name[0] = '(';
943 memcpy(process_name+1, p, l);
944 process_name[1+l] = ')';
945 process_name[1+l+1] = 0;
946
947 rename_process(process_name);
948}
949
c0467cf3 950#ifdef HAVE_SECCOMP
17df7223 951
c0467cf3 952static int apply_seccomp(ExecContext *c) {
17df7223
LP		 953 uint32_t negative_action, action;
954 scmp_filter_ctx *seccomp;
c0467cf3
RC		 955 Iterator i;
956 void *id;
17df7223 957 int r;
8351ceae 958
c0467cf3 959 assert(c);
8351ceae 960
17df7223
LP		 961 negative_action = c->syscall_errno == 0 ? SCMP_ACT_KILL : SCMP_ACT_ERRNO(c->syscall_errno);
962
963 seccomp = seccomp_init(c->syscall_whitelist ? negative_action : SCMP_ACT_ALLOW);
964 if (!seccomp)
965 return -ENOMEM;
8351ceae 966
e9642be2
LP		 967 if (c->syscall_archs) {
968
969 SET_FOREACH(id, c->syscall_archs, i) {
970 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
971 if (r == -EEXIST)
972 continue;
7c66bae2
LP		 973 if (r < 0)
974 goto finish;
e9642be2 975 }
e9642be2 976
7c66bae2 977 } else {
e9642be2 978 r = seccomp_add_secondary_archs(seccomp);
7c66bae2
LP		 979 if (r < 0)
980 goto finish;
57183d11 981 }
8351ceae 982
57183d11 983 action = c->syscall_whitelist ? SCMP_ACT_ALLOW : negative_action;
17df7223
LP		 984 SET_FOREACH(id, c->syscall_filter, i) {
985 r = seccomp_rule_add(seccomp, action, PTR_TO_INT(id) - 1, 0);
7c66bae2
LP		 986 if (r < 0)
987 goto finish;
c0467cf3 988 }
8351ceae 989
7c66bae2
LP		 990 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
991 if (r < 0)
992 goto finish;
993
17df7223 994 r = seccomp_load(seccomp);
7c66bae2
LP		 995
996finish:
17df7223 997 seccomp_release(seccomp);
4298d0b5
LP		 998 return r;
999}
1000
1001static int apply_address_families(ExecContext *c) {
1002 scmp_filter_ctx *seccomp;
1003 Iterator i;
1004 int r;
1005
1006 assert(c);
1007
1008 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1009 if (!seccomp)
1010 return -ENOMEM;
1011
1012 r = seccomp_add_secondary_archs(seccomp);
1013 if (r < 0)
1014 goto finish;
1015
1016 if (c->address_families_whitelist) {
1017 int af, first = 0, last = 0;
1018 void *afp;
1019
1020 /* If this is a whitelist, we first block the address
1021 * families that are out of range and then everything
1022 * that is not in the set. First, we find the lowest
1023 * and highest address family in the set. */
1024
1025 SET_FOREACH(afp, c->address_families, i) {
1026 af = PTR_TO_INT(afp);
17df7223 1027
4298d0b5
LP		 1028 if (af <= 0 || af >= af_max())
1029 continue;
1030
1031 if (first == 0 || af < first)
1032 first = af;
1033
1034 if (last == 0 || af > last)
1035 last = af;
1036 }
1037
1038 assert((first == 0) == (last == 0));
1039
1040 if (first == 0) {
1041
1042 /* No entries in the valid range, block everything */
1043 r = seccomp_rule_add(
1044 seccomp,
1045 SCMP_ACT_ERRNO(EPROTONOSUPPORT),
1046 SCMP_SYS(socket),
1047 0);
1048 if (r < 0)
1049 goto finish;
1050
1051 } else {
1052
1053 /* Block everything below the first entry */
1054 r = seccomp_rule_add(
1055 seccomp,
1056 SCMP_ACT_ERRNO(EPROTONOSUPPORT),
1057 SCMP_SYS(socket),
1058 1,
1059 SCMP_A0(SCMP_CMP_LT, first));
1060 if (r < 0)
1061 goto finish;
1062
1063 /* Block everything above the last entry */
1064 r = seccomp_rule_add(
1065 seccomp,
1066 SCMP_ACT_ERRNO(EPROTONOSUPPORT),
1067 SCMP_SYS(socket),
1068 1,
1069 SCMP_A0(SCMP_CMP_GT, last));
1070 if (r < 0)
1071 goto finish;
1072
1073 /* Block everything between the first and last
1074 * entry */
1075 for (af = 1; af < af_max(); af++) {
1076
1077 if (set_contains(c->address_families, INT_TO_PTR(af)))
1078 continue;
1079
1080 r = seccomp_rule_add(
1081 seccomp,
1082 SCMP_ACT_ERRNO(EPROTONOSUPPORT),
1083 SCMP_SYS(socket),
1084 1,
1085 SCMP_A0(SCMP_CMP_EQ, af));
1086 if (r < 0)
1087 goto finish;
1088 }
1089 }
1090
1091 } else {
1092 void *af;
1093
1094 /* If this is a blacklist, then generate one rule for
1095 * each address family that are then combined in OR
1096 * checks. */
1097
1098 SET_FOREACH(af, c->address_families, i) {
1099
1100 r = seccomp_rule_add(
1101 seccomp,
1102 SCMP_ACT_ERRNO(EPROTONOSUPPORT),
1103 SCMP_SYS(socket),
1104 1,
1105 SCMP_A0(SCMP_CMP_EQ, PTR_TO_INT(af)));
1106 if (r < 0)
1107 goto finish;
1108 }
1109 }
1110
1111 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1112 if (r < 0)
1113 goto finish;
1114
1115 r = seccomp_load(seccomp);
1116
1117finish:
1118 seccomp_release(seccomp);
17df7223 1119 return r;
8351ceae 1120}
4298d0b5 1121
c0467cf3 1122#endif
8351ceae 1123
31a7eb86
ZJS		 1124static void do_idle_pipe_dance(int idle_pipe[4]) {
1125 assert(idle_pipe);
1126
1127 if (idle_pipe[1] >= 0)
1128 close_nointr_nofail(idle_pipe[1]);
1129 if (idle_pipe[2] >= 0)
1130 close_nointr_nofail(idle_pipe[2]);
1131
1132 if (idle_pipe[0] >= 0) {
1133 int r;
1134
1135 r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC);
1136
1137 if (idle_pipe[3] >= 0 && r == 0 /* timeout */) {
1138 /* Signal systemd that we are bored and want to continue. */
1139 write(idle_pipe[3], "x", 1);
1140
1141 /* Wait for systemd to react to the signal above. */
1142 fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC);
1143 }
1144
1145 close_nointr_nofail(idle_pipe[0]);
1146
1147 }
1148
1149 if (idle_pipe[3] >= 0)
1150 close_nointr_nofail(idle_pipe[3]);
1151}
1152
7cae38c4
LP		 1153static int build_environment(
1154 ExecContext *c,
1155 unsigned n_fds,
09812eb7 1156 usec_t watchdog_usec,
7cae38c4
LP		 1157 const char *home,
1158 const char *username,
1159 const char *shell,
1160 char ***ret) {
1161
1162 _cleanup_strv_free_ char **our_env = NULL;
1163 unsigned n_env = 0;
1164 char *x;
1165
1166 assert(c);
1167 assert(ret);
1168
09812eb7 1169 our_env = new0(char*, 10);
7cae38c4
LP		 1170 if (!our_env)
1171 return -ENOMEM;
1172
1173 if (n_fds > 0) {
ccd06097 1174 if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid()) < 0)
7cae38c4
LP		 1175 return -ENOMEM;
1176 our_env[n_env++] = x;
1177
1178 if (asprintf(&x, "LISTEN_FDS=%u", n_fds) < 0)
1179 return -ENOMEM;
1180 our_env[n_env++] = x;
1181 }
1182
09812eb7 1183 if (watchdog_usec > 0) {
ccd06097 1184 if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid()) < 0)
09812eb7
LP		 1185 return -ENOMEM;
1186 our_env[n_env++] = x;
1187
1188 if (asprintf(&x, "WATCHDOG_USEC=%llu", (unsigned long long) watchdog_usec) < 0)
1189 return -ENOMEM;
1190 our_env[n_env++] = x;
1191 }
1192
7cae38c4
LP		 1193 if (home) {
1194 x = strappend("HOME=", home);
1195 if (!x)
1196 return -ENOMEM;
1197 our_env[n_env++] = x;
1198 }
1199
1200 if (username) {
1201 x = strappend("LOGNAME=", username);
1202 if (!x)
1203 return -ENOMEM;
1204 our_env[n_env++] = x;
1205
1206 x = strappend("USER=", username);
1207 if (!x)
1208 return -ENOMEM;
1209 our_env[n_env++] = x;
1210 }
1211
1212 if (shell) {
1213 x = strappend("SHELL=", shell);
1214 if (!x)
1215 return -ENOMEM;
1216 our_env[n_env++] = x;
1217 }
1218
1219 if (is_terminal_input(c->std_input) ||
1220 c->std_output == EXEC_OUTPUT_TTY ||
1221 c->std_error == EXEC_OUTPUT_TTY ||
1222 c->tty_path) {
1223
1224 x = strdup(default_term_for_tty(tty_path(c)));
1225 if (!x)
1226 return -ENOMEM;
1227 our_env[n_env++] = x;
1228 }
1229
1230 our_env[n_env++] = NULL;
09812eb7 1231 assert(n_env <= 10);
7cae38c4
LP		 1232
1233 *ret = our_env;
1234 our_env = NULL;
1235
1236 return 0;
1237}
1238
9fb86720 1239int exec_spawn(ExecCommand *command,
9e2f7c11 1240 char **argv,
c17ec25e 1241 ExecContext *context,
c2748801 1242 int fds[], unsigned n_fds,
1137a57c 1243 char **environment,
81a2b7ce
LP		 1244 bool apply_permissions,
1245 bool apply_chroot,
1e3ad081 1246 bool apply_tty_stdin,
80876c20 1247 bool confirm_spawn,
13b84ec7 1248 CGroupControllerMask cgroup_supported,
4ad49000 1249 const char *cgroup_path,
62bca2c6 1250 const char *unit_id,
09812eb7 1251 usec_t watchdog_usec,
31a7eb86 1252 int idle_pipe[4],
613b411c 1253 ExecRuntime *runtime,
81a2b7ce
LP		 1254 pid_t *ret) {
1255
4ad49000
LP		 1256 _cleanup_strv_free_ char **files_env = NULL;
1257 int socket_fd;
1258 char *line;
034c6ed7 1259 pid_t pid;
8e274523 1260 int r;
034c6ed7 1261
5cb5a6ff
LP		 1262 assert(command);
1263 assert(context);
1264 assert(ret);
034c6ed7
LP		 1265 assert(fds || n_fds <= 0);
1266
4f2d528d
LP		 1267 if (context->std_input == EXEC_INPUT_SOCKET ||
1268 context->std_output == EXEC_OUTPUT_SOCKET ||
1269 context->std_error == EXEC_OUTPUT_SOCKET) {
1270
1271 if (n_fds != 1)
1272 return -EINVAL;
1273
1274 socket_fd = fds[0];
1275
1276 fds = NULL;
1277 n_fds = 0;
1278 } else
1279 socket_fd = -1;
1280
b66871da
ZJS		 1281 r = exec_context_load_environment(context, &files_env);
1282 if (r < 0) {
bbc9006e
MT		 1283 log_struct_unit(LOG_ERR,
1284 unit_id,
23635a85
ZJS		 1285 "MESSAGE=Failed to load environment files: %s", strerror(-r),
1286 "ERRNO=%d", -r,
1287 NULL);
8c7be95e
LP		 1288 return r;
1289 }
1290
9e2f7c11
LP		 1291 if (!argv)
1292 argv = command->argv;
1293
af6da548 1294 line = exec_command_line(argv);
b66871da
ZJS		 1295 if (!line)
1296 return log_oom();
1a63a750 1297
bbc9006e 1298 log_struct_unit(LOG_DEBUG,
099a804b
LP		 1299 unit_id,
1300 "EXECUTABLE=%s", command->path,
1301 "MESSAGE=About to execute: %s", line,
1302 NULL);
1a63a750 1303 free(line);
acbb0225 1304
b66871da
ZJS		 1305 pid = fork();
1306 if (pid < 0)
1307 return -errno;
034c6ed7
LP		 1308
1309 if (pid == 0) {
613b411c 1310 _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL;
59fccd82 1311 const char *username = NULL, *home = NULL, *shell = NULL;
7cae38c4 1312 unsigned n_dont_close = 0;
613b411c 1313 int dont_close[n_fds + 3];
81a2b7ce
LP		 1314 uid_t uid = (uid_t) -1;
1315 gid_t gid = (gid_t) -1;
613b411c
LP		 1316 sigset_t ss;
1317 int i, err;
309bff19 1318
034c6ed7 1319 /* child */
5cb5a6ff 1320
5d6b1584 1321 rename_process_from_path(command->path);
5b6319dc 1322
1b91d3e8
LP		 1323 /* We reset exactly these signals, since they are the
1324 * only ones we set to SIG_IGN in the main daemon. All
1325 * others we leave untouched because we set them to
1326 * SIG_DFL or a valid handler initially, both of which
1327 * will be demoted to SIG_DFL. */
1328 default_signals(SIGNALS_CRASH_HANDLER,
9a34ec5f 1329 SIGNALS_IGNORE, -1);
7b683879 1330
353e12c2
LP		 1331 if (context->ignore_sigpipe)
1332 ignore_signals(SIGPIPE, -1);
1333
1334 assert_se(sigemptyset(&ss) == 0);
1335 if (sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
4c2630eb 1336 err = -errno;
309bff19 1337 r = EXIT_SIGNAL_MASK;
8c7be95e 1338 goto fail_child;
309bff19
LP		 1339 }
1340
31a7eb86
ZJS		 1341 if (idle_pipe)
1342 do_idle_pipe_dance(idle_pipe);
f2b68789 1343
85d73053
LP		 1344 /* Close sockets very early to make sure we don't
1345 * block init reexecution because it cannot bind its
1346 * sockets */
4d8a7798 1347 log_forget_fds();
613b411c
LP		 1348
1349 if (socket_fd >= 0)
1350 dont_close[n_dont_close++] = socket_fd;
1351 if (n_fds > 0) {
1352 memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds);
1353 n_dont_close += n_fds;
1354 }
1355 if (runtime) {
1356 if (runtime->netns_storage_socket[0] >= 0)
1357 dont_close[n_dont_close++] = runtime->netns_storage_socket[0];
1358 if (runtime->netns_storage_socket[1] >= 0)
1359 dont_close[n_dont_close++] = runtime->netns_storage_socket[1];
1360 }
1361
1362 err = close_all_fds(dont_close, n_dont_close);
4c2630eb 1363 if (err < 0) {
fc9b2a84 1364 r = EXIT_FDS;
8c7be95e 1365 goto fail_child;
fc9b2a84
LP		 1366 }
1367
74922904 1368 if (!context->same_pgrp)
8d567588 1369 if (setsid() < 0) {
4c2630eb 1370 err = -errno;
8d567588 1371 r = EXIT_SETSID;
8c7be95e 1372 goto fail_child;
8d567588 1373 }
80876c20 1374
c5da34ef
LP		 1375 if (context->tcpwrap_name) {
1376 if (socket_fd >= 0)
1377 if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
4c2630eb 1378 err = -EACCES;
c5da34ef 1379 r = EXIT_TCPWRAP;
8c7be95e 1380 goto fail_child;
c5da34ef
LP		 1381 }
1382
1383 for (i = 0; i < (int) n_fds; i++) {
1384 if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) {
4c2630eb 1385 err = -EACCES;
c5da34ef 1386 r = EXIT_TCPWRAP;
8c7be95e 1387 goto fail_child;
c5da34ef 1388 }
df1f0afe 1389 }
c5da34ef 1390 }
df1f0afe 1391
6ea832a2
LP		 1392 exec_context_tty_reset(context);
1393
af6da548 1394 if (confirm_spawn) {
80876c20
LP		 1395 char response;
1396
af6da548
LP		 1397 err = ask_for_confirmation(&response, argv);
1398 if (err == -ETIMEDOUT)
1399 write_confirm_message("Confirmation question timed out, assuming positive response.\n");
1400 else if (err < 0)
1401 write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-err));
1402 else if (response == 's') {
1403 write_confirm_message("Skipping execution.\n");
4c2630eb 1404 err = -ECANCELED;
80876c20 1405 r = EXIT_CONFIRM;
8c7be95e 1406 goto fail_child;
af6da548
LP		 1407 } else if (response == 'n') {
1408 write_confirm_message("Failing execution.\n");
4c2630eb 1409 err = r = 0;
8c7be95e 1410 goto fail_child;
ee2b4894 1411 }
034c6ed7
LP		 1412 }
1413
da726a4d
LP		 1414 /* If a socket is connected to STDIN/STDOUT/STDERR, we
1415 * must sure to drop O_NONBLOCK */
1416 if (socket_fd >= 0)
1417 fd_nonblock(socket_fd, false);
1418
af6da548
LP		 1419 err = setup_input(context, socket_fd, apply_tty_stdin);
1420 if (err < 0) {
1421 r = EXIT_STDIN;
1422 goto fail_child;
4c2630eb 1423 }
9eba9da4 1424
2b6bf07d 1425 err = setup_output(context, STDOUT_FILENO, socket_fd, basename(command->path), unit_id, apply_tty_stdin);
af6da548
LP		 1426 if (err < 0) {
1427 r = EXIT_STDOUT;
1428 goto fail_child;
4c2630eb 1429 }
94f04347 1430
2b6bf07d 1431 err = setup_output(context, STDERR_FILENO, socket_fd, basename(command->path), unit_id, apply_tty_stdin);
4c2630eb 1432 if (err < 0) {
80876c20 1433 r = EXIT_STDERR;
8c7be95e 1434 goto fail_child;
071830ff
LP		 1435 }
1436
4ad49000 1437 if (cgroup_path) {
13b84ec7 1438 err = cg_attach_everywhere(cgroup_supported, cgroup_path, 0);
4c2630eb 1439 if (err < 0) {
8e274523 1440 r = EXIT_CGROUP;
8c7be95e 1441 goto fail_child;
8e274523 1442 }
4c2630eb 1443 }
8e274523 1444
dd6c17b1 1445 if (context->oom_score_adjust_set) {
fb33a393 1446 char t[16];
034c6ed7 1447
dd6c17b1 1448 snprintf(t, sizeof(t), "%i", context->oom_score_adjust);
fb33a393 1449 char_array_0(t);
034c6ed7 1450
574d5f2d 1451 if (write_string_file("/proc/self/oom_score_adj", t) < 0) {
8600c525
KS		 1452 err = -errno;
1453 r = EXIT_OOM_ADJUST;
1454 goto fail_child;
fb33a393 1455 }
034c6ed7
LP		 1456 }
1457
fb33a393
LP		 1458 if (context->nice_set)
1459 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
4c2630eb 1460 err = -errno;
fb33a393 1461 r = EXIT_NICE;
8c7be95e 1462 goto fail_child;
fb33a393
LP		 1463 }
1464
94f04347 1465 if (context->cpu_sched_set) {
b92bea5d
ZJS		 1466 struct sched_param param = {
1467 .sched_priority = context->cpu_sched_priority,
1468 };
94f04347 1469
e62d8c39
ZJS		 1470 r = sched_setscheduler(0,
1471 context->cpu_sched_policy |
1472 (context->cpu_sched_reset_on_fork ?
1473 SCHED_RESET_ON_FORK : 0),
1474 &param);
1475 if (r < 0) {
4c2630eb 1476 err = -errno;
94f04347 1477 r = EXIT_SETSCHEDULER;
8c7be95e 1478 goto fail_child;
94f04347
LP		 1479 }
1480 }
1481
82c121a4
LP		 1482 if (context->cpuset)
1483 if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) {
4c2630eb 1484 err = -errno;
94f04347 1485 r = EXIT_CPUAFFINITY;
8c7be95e 1486 goto fail_child;
94f04347
LP		 1487 }
1488
9eba9da4
LP		 1489 if (context->ioprio_set)
1490 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
4c2630eb 1491 err = -errno;
9eba9da4 1492 r = EXIT_IOPRIO;
8c7be95e 1493 goto fail_child;
9eba9da4
LP		 1494 }
1495
d88a251b 1496 if (context->timer_slack_nsec != (nsec_t) -1)
03fae018 1497 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
4c2630eb 1498 err = -errno;
94f04347 1499 r = EXIT_TIMERSLACK;
8c7be95e 1500 goto fail_child;
94f04347
LP		 1501 }
1502
ac45f971
LP		 1503 if (context->personality != 0xffffffffUL)
1504 if (personality(context->personality) < 0) {
1505 err = -errno;
1506 r = EXIT_PERSONALITY;
1507 goto fail_child;
1508 }
1509
169c1bda 1510 if (context->utmp_id)
0ad26e09 1511 utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path);
169c1bda 1512
81a2b7ce
LP		 1513 if (context->user) {
1514 username = context->user;
59fccd82 1515 err = get_user_creds(&username, &uid, &gid, &home, &shell);
4c2630eb 1516 if (err < 0) {
81a2b7ce 1517 r = EXIT_USER;
8c7be95e 1518 goto fail_child;
81a2b7ce 1519 }
d8b4e2e9 1520
4c2630eb
MS		 1521 if (is_terminal_input(context->std_input)) {
1522 err = chown_terminal(STDIN_FILENO, uid);
1523 if (err < 0) {
d8b4e2e9 1524 r = EXIT_STDIN;
8c7be95e 1525 goto fail_child;
d8b4e2e9 1526 }
4c2630eb 1527 }
81a2b7ce
LP		 1528 }
1529
8aa75193
LP		 1530#ifdef HAVE_PAM
1531 if (cgroup_path && context->user && context->pam_name) {
1532 err = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, 0644, uid, gid);
1533 if (err < 0) {
1534 r = EXIT_CGROUP;
1535 goto fail_child;
1536 }
1537
1538
1539 err = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, 0755, uid, gid);
1540 if (err < 0) {
1541 r = EXIT_CGROUP;
1542 goto fail_child;
1543 }
1544 }
1545#endif
1546
4c2630eb
MS		 1547 if (apply_permissions) {
1548 err = enforce_groups(context, username, gid);
1549 if (err < 0) {
3b8bddde
LP		 1550 r = EXIT_GROUP;
1551 goto fail_child;
1552 }
4c2630eb 1553 }
3b8bddde
LP		 1554
1555 umask(context->umask);
1556
5b6319dc 1557#ifdef HAVE_PAM
b7848021 1558 if (apply_permissions && context->pam_name && username) {
940c5210 1559 err = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds);
4c2630eb 1560 if (err < 0) {
5b6319dc 1561 r = EXIT_PAM;
8c7be95e 1562 goto fail_child;
5b6319dc
LP		 1563 }
1564 }
1565#endif
613b411c
LP		 1566 if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) {
1567 err = setup_netns(runtime->netns_storage_socket);
1568 if (err < 0) {
ff01d048
LP		 1569 r = EXIT_NETWORK;
1570 goto fail_child;
1571 }
ff01d048 1572 }
5b6319dc 1573
613b411c
LP		 1574 if (!strv_isempty(context->read_write_dirs) ||
1575 !strv_isempty(context->read_only_dirs) ||
1576 !strv_isempty(context->inaccessible_dirs) ||
ac0930c8 1577 context->mount_flags != 0 ||
7f112f50
LP		 1578 (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir)) ||
1579 context->private_devices) {
613b411c
LP		 1580
1581 char *tmp = NULL, *var = NULL;
1582
1583 /* The runtime struct only contains the parent
1584 * of the private /tmp, which is
1585 * non-accessible to world users. Inside of it
1586 * there's a /tmp that is sticky, and that's
1587 * the one we want to use here. */
1588
1589 if (context->private_tmp && runtime) {
1590 if (runtime->tmp_dir)
1591 tmp = strappenda(runtime->tmp_dir, "/tmp");
1592 if (runtime->var_tmp_dir)
1593 var = strappenda(runtime->var_tmp_dir, "/tmp");
1594 }
1595
1596 err = setup_namespace(
1597 context->read_write_dirs,
1598 context->read_only_dirs,
1599 context->inaccessible_dirs,
1600 tmp,
1601 var,
7f112f50 1602 context->private_devices,
613b411c
LP		 1603 context->mount_flags);
1604
4c2630eb
MS		 1605 if (err < 0) {
1606 r = EXIT_NAMESPACE;
8c7be95e 1607 goto fail_child;
4c2630eb
MS		 1608 }
1609 }
04aa0cb9 1610
81a2b7ce
LP		 1611 if (apply_chroot) {
1612 if (context->root_directory)
1613 if (chroot(context->root_directory) < 0) {
4c2630eb 1614 err = -errno;
81a2b7ce 1615 r = EXIT_CHROOT;
8c7be95e 1616 goto fail_child;
81a2b7ce
LP		 1617 }
1618
1619 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
4c2630eb 1620 err = -errno;
81a2b7ce 1621 r = EXIT_CHDIR;
8c7be95e 1622 goto fail_child;
81a2b7ce
LP		 1623 }
1624 } else {
7fd1b19b 1625 _cleanup_free_ char *d = NULL;
81a2b7ce
LP		 1626
1627 if (asprintf(&d, "%s/%s",
1628 context->root_directory ? context->root_directory : "",
1629 context->working_directory ? context->working_directory : "") < 0) {
4c2630eb 1630 err = -ENOMEM;
81a2b7ce 1631 r = EXIT_MEMORY;
8c7be95e 1632 goto fail_child;
81a2b7ce
LP		 1633 }
1634
1635 if (chdir(d) < 0) {
4c2630eb 1636 err = -errno;
81a2b7ce 1637 r = EXIT_CHDIR;
8c7be95e 1638 goto fail_child;
81a2b7ce 1639 }
81a2b7ce
LP		 1640 }
1641
fc9b2a84
LP		 1642 /* We repeat the fd closing here, to make sure that
1643 * nothing is leaked from the PAM modules */
4c2630eb
MS		 1644 err = close_all_fds(fds, n_fds);
1645 if (err >= 0)
1646 err = shift_fds(fds, n_fds);
1647 if (err >= 0)
1648 err = flags_fds(fds, n_fds, context->non_blocking);
1649 if (err < 0) {
034c6ed7 1650 r = EXIT_FDS;
8c7be95e 1651 goto fail_child;
034c6ed7
LP		 1652 }
1653
81a2b7ce 1654 if (apply_permissions) {
034c6ed7 1655
81a2b7ce
LP		 1656 for (i = 0; i < RLIMIT_NLIMITS; i++) {
1657 if (!context->rlimit[i])
1658 continue;
1659
68faf98c 1660 if (setrlimit_closest(i, context->rlimit[i]) < 0) {
4c2630eb 1661 err = -errno;
81a2b7ce 1662 r = EXIT_LIMITS;
8c7be95e 1663 goto fail_child;
81a2b7ce 1664 }
034c6ed7 1665 }
034c6ed7 1666
4c2630eb 1667 if (context->capability_bounding_set_drop) {
ec8927ca 1668 err = capability_bounding_set_drop(context->capability_bounding_set_drop, false);
4c2630eb 1669 if (err < 0) {
73090dc8
LP		 1670 r = EXIT_CAPABILITIES;
1671 goto fail_child;
1672 }
4c2630eb 1673 }
260abb78 1674
4c2630eb
MS		 1675 if (context->user) {
1676 err = enforce_user(context, uid);
1677 if (err < 0) {
81a2b7ce 1678 r = EXIT_USER;
8c7be95e 1679 goto fail_child;
81a2b7ce 1680 }
4c2630eb 1681 }
81a2b7ce 1682
35b8ca3a 1683 /* PR_GET_SECUREBITS is not privileged, while
693ced48
LP		 1684 * PR_SET_SECUREBITS is. So to suppress
1685 * potential EPERMs we'll try not to call
1686 * PR_SET_SECUREBITS unless necessary. */
1687 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
1688 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
4c2630eb 1689 err = -errno;
693ced48 1690 r = EXIT_SECUREBITS;
8c7be95e 1691 goto fail_child;
693ced48 1692 }
81a2b7ce
LP		 1693
1694 if (context->capabilities)
1695 if (cap_set_proc(context->capabilities) < 0) {
4c2630eb 1696 err = -errno;
81a2b7ce 1697 r = EXIT_CAPABILITIES;
8c7be95e 1698 goto fail_child;
81a2b7ce 1699 }
8351ceae
LP		 1700
1701 if (context->no_new_privileges)
1702 if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) {
1703 err = -errno;
1704 r = EXIT_NO_NEW_PRIVILEGES;
1705 goto fail_child;
1706 }
1707
c0467cf3 1708#ifdef HAVE_SECCOMP
f513e420
LP		 1709 if (context->address_families_whitelist ||
1710 !set_isempty(context->address_families)) {
4298d0b5
LP		 1711 err = apply_address_families(context);
1712 if (err < 0) {
1713 r = EXIT_ADDRESS_FAMILIES;
1714 goto fail_child;
1715 }
1716 }
1717
f513e420
LP		 1718 if (context->syscall_whitelist ||
1719 !set_isempty(context->syscall_filter) ||
1720 !set_isempty(context->syscall_archs)) {
c0467cf3 1721 err = apply_seccomp(context);
8351ceae
LP		 1722 if (err < 0) {
1723 r = EXIT_SECCOMP;
1724 goto fail_child;
1725 }
1726 }
c0467cf3 1727#endif
17df7223 1728
7b52a628 1729#ifdef HAVE_SELINUX
5c56a259 1730 if (context->selinux_context && use_selinux()) {
5f8640fb
LP		 1731 err = setexeccon(context->selinux_context);
1732 if (err < 0 && !context->selinux_context_ignore) {
7b52a628
MS		 1733 r = EXIT_SELINUX_CONTEXT;
1734 goto fail_child;
1735 }
1736 }
1737#endif
eef65bf3
MS		 1738
1739#ifdef HAVE_APPARMOR
1740 if (context->apparmor_profile && use_apparmor()) {
1741 err = aa_change_onexec(context->apparmor_profile);
1742 if (err < 0 && !context->apparmor_profile_ignore) {
1743 r = EXIT_APPARMOR_PROFILE;
1744 goto fail_child;
1745 }
1746 }
1747#endif
94f04347
LP		 1748 }
1749
09812eb7 1750 err = build_environment(context, n_fds, watchdog_usec, home, username, shell, &our_env);
7cae38c4 1751 if (r < 0) {
81a2b7ce 1752 r = EXIT_MEMORY;
8c7be95e 1753 goto fail_child;
81a2b7ce 1754 }
034c6ed7 1755
e62d8c39
ZJS		 1756 final_env = strv_env_merge(5,
1757 environment,
1758 our_env,
1759 context->environment,
1760 files_env,
1761 pam_env,
1762 NULL);
1763 if (!final_env) {
4c2630eb 1764 err = -ENOMEM;
81a2b7ce 1765 r = EXIT_MEMORY;
8c7be95e 1766 goto fail_child;
81a2b7ce 1767 }
034c6ed7 1768
e62d8c39
ZJS		 1769 final_argv = replace_env_argv(argv, final_env);
1770 if (!final_argv) {
4c2630eb 1771 err = -ENOMEM;
fab56fc5 1772 r = EXIT_MEMORY;
8c7be95e 1773 goto fail_child;
fab56fc5
LP		 1774 }
1775
a6ff950e
LP		 1776 final_env = strv_env_clean(final_env);
1777
03bb799e
HH		 1778 if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) {
1779 line = exec_command_line(final_argv);
1780 if (line) {
1781 log_open();
1782 log_struct_unit(LOG_DEBUG,
1783 unit_id,
1784 "EXECUTABLE=%s", command->path,
099a804b
LP		 1785 "MESSAGE=Executing: %s", line,
1786 NULL);
03bb799e
HH		 1787 log_close();
1788 free(line);
1789 line = NULL;
1790 }
1791 }
fab56fc5 1792 execve(command->path, final_argv, final_env);
4c2630eb 1793 err = -errno;
034c6ed7
LP		 1794 r = EXIT_EXEC;
1795
8c7be95e 1796 fail_child:
4c2630eb
MS		 1797 if (r != 0) {
1798 log_open();
23635a85
ZJS		 1799 log_struct(LOG_ERR, MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED),
1800 "EXECUTABLE=%s", command->path,
1801 "MESSAGE=Failed at step %s spawning %s: %s",
1802 exit_status_to_string(r, EXIT_STATUS_SYSTEMD),
1803 command->path, strerror(-err),
1804 "ERRNO=%d", -err,
1805 NULL);
1806 log_close();
4c2630eb
MS		 1807 }
1808
034c6ed7
LP		 1809 _exit(r);
1810 }
1811
bbc9006e 1812 log_struct_unit(LOG_DEBUG,
e62d8c39 1813 unit_id,
ccd06097
ZJS		 1814 "MESSAGE=Forked %s as "PID_FMT,
1815 command->path, pid,
e62d8c39 1816 NULL);
23635a85 1817
80876c20
LP		 1818 /* We add the new process to the cgroup both in the child (so
1819 * that we can be sure that no user code is ever executed
1820 * outside of the cgroup) and in the parent (so that we can be
1821 * sure that when we kill the cgroup the process will be
1822 * killed too). */
4ad49000
LP		 1823 if (cgroup_path)
1824 cg_attach(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, pid);
2da3263a 1825
b58b4116 1826 exec_status_start(&command->exec_status, pid);
9fb86720 1827
034c6ed7 1828 *ret = pid;
5cb5a6ff
LP		 1829 return 0;
1830}
1831
034c6ed7
LP		 1832void exec_context_init(ExecContext *c) {
1833 assert(c);
1834
4c12626c 1835 c->umask = 0022;
9eba9da4 1836 c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
94f04347 1837 c->cpu_sched_policy = SCHED_OTHER;
071830ff 1838 c->syslog_priority = LOG_DAEMON|LOG_INFO;
74922904 1839 c->syslog_level_prefix = true;
353e12c2 1840 c->ignore_sigpipe = true;
d88a251b 1841 c->timer_slack_nsec = (nsec_t) -1;
ac45f971 1842 c->personality = 0xffffffffUL;
034c6ed7
LP		 1843}
1844
613b411c 1845void exec_context_done(ExecContext *c) {
5cb5a6ff
LP		 1846 unsigned l;
1847
1848 assert(c);
1849
1850 strv_free(c->environment);
034c6ed7 1851 c->environment = NULL;
5cb5a6ff 1852
8c7be95e
LP		 1853 strv_free(c->environment_files);
1854 c->environment_files = NULL;
1855
034c6ed7 1856 for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
5cb5a6ff 1857 free(c->rlimit[l]);
034c6ed7
LP		 1858 c->rlimit[l] = NULL;
1859 }
1860
9eba9da4
LP		 1861 free(c->working_directory);
1862 c->working_directory = NULL;
1863 free(c->root_directory);
1864 c->root_directory = NULL;
5cb5a6ff 1865
80876c20
LP		 1866 free(c->tty_path);
1867 c->tty_path = NULL;
1868
df1f0afe
LP		 1869 free(c->tcpwrap_name);
1870 c->tcpwrap_name = NULL;
1871
071830ff
LP		 1872 free(c->syslog_identifier);
1873 c->syslog_identifier = NULL;
1874
5cb5a6ff 1875 free(c->user);
034c6ed7
LP		 1876 c->user = NULL;
1877
5cb5a6ff 1878 free(c->group);
034c6ed7
LP		 1879 c->group = NULL;
1880
1881 strv_free(c->supplementary_groups);
1882 c->supplementary_groups = NULL;
94f04347 1883
5b6319dc
LP		 1884 free(c->pam_name);
1885 c->pam_name = NULL;
1886
94f04347
LP		 1887 if (c->capabilities) {
1888 cap_free(c->capabilities);
1889 c->capabilities = NULL;
1890 }
15ae422b
LP		 1891
1892 strv_free(c->read_only_dirs);
1893 c->read_only_dirs = NULL;
1894
1895 strv_free(c->read_write_dirs);
1896 c->read_write_dirs = NULL;
1897
1898 strv_free(c->inaccessible_dirs);
1899 c->inaccessible_dirs = NULL;
82c121a4
LP		 1900
1901 if (c->cpuset)
1902 CPU_FREE(c->cpuset);
86a3475b
LP		 1903
1904 free(c->utmp_id);
1905 c->utmp_id = NULL;
b9a0e010 1906
7b52a628
MS		 1907 free(c->selinux_context);
1908 c->selinux_context = NULL;
1909
eef65bf3
MS		 1910 free(c->apparmor_profile);
1911 c->apparmor_profile = NULL;
1912
17df7223
LP		 1913 set_free(c->syscall_filter);
1914 c->syscall_filter = NULL;
57183d11
LP		 1915
1916 set_free(c->syscall_archs);
1917 c->syscall_archs = NULL;
4298d0b5
LP		 1918
1919 set_free(c->address_families);
1920 c->address_families = NULL;
5cb5a6ff
LP		 1921}
1922
43d0fcbd
LP		 1923void exec_command_done(ExecCommand *c) {
1924 assert(c);
1925
1926 free(c->path);
1927 c->path = NULL;
1928
1929 strv_free(c->argv);
1930 c->argv = NULL;
1931}
1932
1933void exec_command_done_array(ExecCommand *c, unsigned n) {
1934 unsigned i;
1935
1936 for (i = 0; i < n; i++)
1937 exec_command_done(c+i);
1938}
1939
5cb5a6ff
LP		 1940void exec_command_free_list(ExecCommand *c) {
1941 ExecCommand *i;
1942
1943 while ((i = c)) {
71fda00f 1944 LIST_REMOVE(command, c, i);
43d0fcbd 1945 exec_command_done(i);
5cb5a6ff
LP		 1946 free(i);
1947 }
1948}
1949
034c6ed7
LP		 1950void exec_command_free_array(ExecCommand **c, unsigned n) {
1951 unsigned i;
1952
1953 for (i = 0; i < n; i++) {
1954 exec_command_free_list(c[i]);
1955 c[i] = NULL;
1956 }
1957}
1958
8c7be95e
LP		 1959int exec_context_load_environment(const ExecContext *c, char ***l) {
1960 char **i, **r = NULL;
1961
1962 assert(c);
1963 assert(l);
1964
1965 STRV_FOREACH(i, c->environment_files) {
1966 char *fn;
1967 int k;
1968 bool ignore = false;
1969 char **p;
7fd1b19b 1970 _cleanup_globfree_ glob_t pglob = {};
2bef10ab 1971 int count, n;
8c7be95e
LP		 1972
1973 fn = *i;
1974
1975 if (fn[0] == '-') {
1976 ignore = true;
1977 fn ++;
1978 }
1979
1980 if (!path_is_absolute(fn)) {
8c7be95e
LP		 1981 if (ignore)
1982 continue;
1983
1984 strv_free(r);
1985 return -EINVAL;
1986 }
1987
2bef10ab 1988 /* Filename supports globbing, take all matching files */
2bef10ab
PL		 1989 errno = 0;
1990 if (glob(fn, 0, NULL, &pglob) != 0) {
2bef10ab
PL		 1991 if (ignore)
1992 continue;
8c7be95e 1993
2bef10ab
PL		 1994 strv_free(r);
1995 return errno ? -errno : -EINVAL;
1996 }
1997 count = pglob.gl_pathc;
1998 if (count == 0) {
8c7be95e
LP		 1999 if (ignore)
2000 continue;
2001
2002 strv_free(r);
2bef10ab 2003 return -EINVAL;
8c7be95e 2004 }
2bef10ab 2005 for (n = 0; n < count; n++) {
f73141d7 2006 k = load_env_file(pglob.gl_pathv[n], NULL, &p);
2bef10ab
PL		 2007 if (k < 0) {
2008 if (ignore)
2009 continue;
8c7be95e 2010
2bef10ab 2011 strv_free(r);
2bef10ab 2012 return k;
e9c1ea9d 2013 }
ebc05a09 2014 /* Log invalid environment variables with filename */
e9c1ea9d
JSJ		 2015 if (p)
2016 p = strv_env_clean_log(p, pglob.gl_pathv[n]);
8c7be95e 2017
2bef10ab
PL		 2018 if (r == NULL)
2019 r = p;
2020 else {
2021 char **m;
8c7be95e 2022
2bef10ab
PL		 2023 m = strv_env_merge(2, r, p);
2024 strv_free(r);
2025 strv_free(p);
c84a9488 2026 if (!m)
2bef10ab 2027 return -ENOMEM;
2bef10ab
PL		 2028
2029 r = m;
2030 }
8c7be95e
LP		 2031 }
2032 }
2033
2034 *l = r;
2035
2036 return 0;
2037}
2038
6ac8fdc9
MS		 2039static bool tty_may_match_dev_console(const char *tty) {
2040 char *active = NULL, *console;
2041 bool b;
2042
2043 if (startswith(tty, "/dev/"))
2044 tty += 5;
2045
2046 /* trivial identity? */
2047 if (streq(tty, "console"))
2048 return true;
2049
2050 console = resolve_dev_console(&active);
2051 /* if we could not resolve, assume it may */
2052 if (!console)
2053 return true;
2054
2055 /* "tty0" means the active VC, so it may be the same sometimes */
2056 b = streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty));
2057 free(active);
2058
2059 return b;
2060}
2061
2062bool exec_context_may_touch_console(ExecContext *ec) {
2063 return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate ||
2064 is_terminal_input(ec->std_input) ||
2065 is_terminal_output(ec->std_output) ||
2066 is_terminal_output(ec->std_error)) &&
2067 tty_may_match_dev_console(tty_path(ec));
2068}
2069
15ae422b
LP		 2070static void strv_fprintf(FILE *f, char **l) {
2071 char **g;
2072
2073 assert(f);
2074
2075 STRV_FOREACH(g, l)
2076 fprintf(f, " %s", *g);
2077}
2078
5cb5a6ff 2079void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
507f22bd 2080 char **e;
94f04347 2081 unsigned i;
9eba9da4 2082
5cb5a6ff
LP		 2083 assert(c);
2084 assert(f);
2085
4ad49000 2086 prefix = strempty(prefix);
5cb5a6ff
LP		 2087
2088 fprintf(f,
94f04347
LP		 2089 "%sUMask: %04o\n"
2090 "%sWorkingDirectory: %s\n"
451a074f 2091 "%sRootDirectory: %s\n"
15ae422b 2092 "%sNonBlocking: %s\n"
64747e2d 2093 "%sPrivateTmp: %s\n"
4819ff03 2094 "%sPrivateNetwork: %s\n"
7f112f50 2095 "%sPrivateDevices: %s\n"
4819ff03 2096 "%sIgnoreSIGPIPE: %s\n",
5cb5a6ff 2097 prefix, c->umask,
9eba9da4 2098 prefix, c->working_directory ? c->working_directory : "/",
451a074f 2099 prefix, c->root_directory ? c->root_directory : "/",
15ae422b 2100 prefix, yes_no(c->non_blocking),
64747e2d 2101 prefix, yes_no(c->private_tmp),
4819ff03 2102 prefix, yes_no(c->private_network),
7f112f50 2103 prefix, yes_no(c->private_devices),
4819ff03 2104 prefix, yes_no(c->ignore_sigpipe));
fb33a393 2105
8c7be95e
LP		 2106 STRV_FOREACH(e, c->environment)
2107 fprintf(f, "%sEnvironment: %s\n", prefix, *e);
2108
2109 STRV_FOREACH(e, c->environment_files)
2110 fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e);
94f04347 2111
df1f0afe
LP		 2112 if (c->tcpwrap_name)
2113 fprintf(f,
2114 "%sTCPWrapName: %s\n",
2115 prefix, c->tcpwrap_name);
2116
fb33a393
LP		 2117 if (c->nice_set)
2118 fprintf(f,
2119 "%sNice: %i\n",
2120 prefix, c->nice);
2121
dd6c17b1 2122 if (c->oom_score_adjust_set)
fb33a393 2123 fprintf(f,
dd6c17b1
LP		 2124 "%sOOMScoreAdjust: %i\n",
2125 prefix, c->oom_score_adjust);
9eba9da4 2126
94f04347
LP		 2127 for (i = 0; i < RLIM_NLIMITS; i++)
2128 if (c->rlimit[i])
ea430986 2129 fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
94f04347 2130
f8b69d1d 2131 if (c->ioprio_set) {
1756a011 2132 _cleanup_free_ char *class_str = NULL;
f8b69d1d 2133
1756a011 2134 ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str);
9eba9da4
LP		 2135 fprintf(f,
2136 "%sIOSchedulingClass: %s\n"
2137 "%sIOPriority: %i\n",
f8b69d1d 2138 prefix, strna(class_str),
9eba9da4 2139 prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
f8b69d1d 2140 }
94f04347 2141
f8b69d1d 2142 if (c->cpu_sched_set) {
1756a011 2143 _cleanup_free_ char *policy_str = NULL;
f8b69d1d 2144
1756a011 2145 sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str);
94f04347
LP		 2146 fprintf(f,
2147 "%sCPUSchedulingPolicy: %s\n"
38b48754
LP		 2148 "%sCPUSchedulingPriority: %i\n"
2149 "%sCPUSchedulingResetOnFork: %s\n",
f8b69d1d 2150 prefix, strna(policy_str),
38b48754
LP		 2151 prefix, c->cpu_sched_priority,
2152 prefix, yes_no(c->cpu_sched_reset_on_fork));
b929bf04 2153 }
94f04347 2154
82c121a4 2155 if (c->cpuset) {
94f04347 2156 fprintf(f, "%sCPUAffinity:", prefix);
82c121a4
LP		 2157 for (i = 0; i < c->cpuset_ncpus; i++)
2158 if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset))
43a99a7a 2159 fprintf(f, " %u", i);
94f04347
LP		 2160 fputs("\n", f);
2161 }
2162
d88a251b 2163 if (c->timer_slack_nsec != (nsec_t) -1)
ccd06097 2164 fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec);
94f04347
LP		 2165
2166 fprintf(f,
80876c20
LP		 2167 "%sStandardInput: %s\n"
2168 "%sStandardOutput: %s\n"
2169 "%sStandardError: %s\n",
2170 prefix, exec_input_to_string(c->std_input),
2171 prefix, exec_output_to_string(c->std_output),
2172 prefix, exec_output_to_string(c->std_error));
2173
2174 if (c->tty_path)
2175 fprintf(f,
6ea832a2
LP		 2176 "%sTTYPath: %s\n"
2177 "%sTTYReset: %s\n"
2178 "%sTTYVHangup: %s\n"
2179 "%sTTYVTDisallocate: %s\n",
2180 prefix, c->tty_path,
2181 prefix, yes_no(c->tty_reset),
2182 prefix, yes_no(c->tty_vhangup),
2183 prefix, yes_no(c->tty_vt_disallocate));
94f04347 2184
5ce70e5b
ZJS		 2185 if (c->std_output == EXEC_OUTPUT_SYSLOG ||
2186 c->std_output == EXEC_OUTPUT_KMSG ||
2187 c->std_output == EXEC_OUTPUT_JOURNAL ||
2188 c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE ||
2189 c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
2190 c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE ||
2191 c->std_error == EXEC_OUTPUT_SYSLOG ||
2192 c->std_error == EXEC_OUTPUT_KMSG ||
2193 c->std_error == EXEC_OUTPUT_JOURNAL ||
2194 c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE ||
2195 c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
2196 c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) {
f8b69d1d 2197
5ce70e5b 2198 _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL;
f8b69d1d 2199
5ce70e5b
ZJS		 2200 log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str);
2201 log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str);
f8b69d1d 2202
94f04347
LP		 2203 fprintf(f,
2204 "%sSyslogFacility: %s\n"
2205 "%sSyslogLevel: %s\n",
f8b69d1d
MS		 2206 prefix, strna(fac_str),
2207 prefix, strna(lvl_str));
f8b69d1d 2208 }
94f04347
LP		 2209
2210 if (c->capabilities) {
5ce70e5b
ZJS		 2211 _cleanup_cap_free_charp_ char *t;
2212
2213 t = cap_to_text(c->capabilities, NULL);
2214 if (t)
2215 fprintf(f, "%sCapabilities: %s\n", prefix, t);
94f04347
LP		 2216 }
2217
2218 if (c->secure_bits)
2219 fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
2220 prefix,
cbb21cca
ZJS		 2221 (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "",
2222 (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
2223 (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
2224 (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
2225 (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "",
2226 (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
94f04347
LP		 2227
2228 if (c->capability_bounding_set_drop) {
ae556c21 2229 unsigned long l;
260abb78 2230 fprintf(f, "%sCapabilityBoundingSet:", prefix);
94f04347 2231
64685e0c 2232 for (l = 0; l <= cap_last_cap(); l++)
ae556c21 2233 if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) {
5ce70e5b 2234 _cleanup_cap_free_charp_ char *t;
94f04347 2235
5ce70e5b
ZJS		 2236 t = cap_to_name(l);
2237 if (t)
94f04347 2238 fprintf(f, " %s", t);
94f04347
LP		 2239 }
2240
2241 fputs("\n", f);
2242 }
2243
2244 if (c->user)
f2d3769a 2245 fprintf(f, "%sUser: %s\n", prefix, c->user);
94f04347 2246 if (c->group)
f2d3769a 2247 fprintf(f, "%sGroup: %s\n", prefix, c->group);
94f04347 2248
15ae422b 2249 if (strv_length(c->supplementary_groups) > 0) {
94f04347 2250 fprintf(f, "%sSupplementaryGroups:", prefix);
15ae422b
LP		 2251 strv_fprintf(f, c->supplementary_groups);
2252 fputs("\n", f);
2253 }
94f04347 2254
5b6319dc 2255 if (c->pam_name)
f2d3769a 2256 fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name);
5b6319dc 2257
15ae422b
LP		 2258 if (strv_length(c->read_write_dirs) > 0) {
2259 fprintf(f, "%sReadWriteDirs:", prefix);
2260 strv_fprintf(f, c->read_write_dirs);
2261 fputs("\n", f);
2262 }
2263
2264 if (strv_length(c->read_only_dirs) > 0) {
2265 fprintf(f, "%sReadOnlyDirs:", prefix);
2266 strv_fprintf(f, c->read_only_dirs);
2267 fputs("\n", f);
2268 }
94f04347 2269
15ae422b
LP		 2270 if (strv_length(c->inaccessible_dirs) > 0) {
2271 fprintf(f, "%sInaccessibleDirs:", prefix);
2272 strv_fprintf(f, c->inaccessible_dirs);
94f04347
LP		 2273 fputs("\n", f);
2274 }
2e22afe9 2275
169c1bda
LP		 2276 if (c->utmp_id)
2277 fprintf(f,
2278 "%sUtmpIdentifier: %s\n",
2279 prefix, c->utmp_id);
7b52a628
MS		 2280
2281 if (c->selinux_context)
2282 fprintf(f,
5f8640fb
LP		 2283 "%sSELinuxContext: %s%s\n",
2284 prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context);
17df7223 2285
ac45f971
LP		 2286 if (c->personality != 0xffffffffUL)
2287 fprintf(f,
2288 "%sPersonality: %s\n",
2289 prefix, strna(personality_to_string(c->personality)));
2290
17df7223 2291 if (c->syscall_filter) {
351a19b1 2292#ifdef HAVE_SECCOMP
17df7223
LP		 2293 Iterator j;
2294 void *id;
2295 bool first = true;
351a19b1 2296#endif
17df7223
LP		 2297
2298 fprintf(f,
57183d11 2299 "%sSystemCallFilter: ",
17df7223
LP		 2300 prefix);
2301
2302 if (!c->syscall_whitelist)
2303 fputc('~', f);
2304
351a19b1 2305#ifdef HAVE_SECCOMP
17df7223
LP		 2306 SET_FOREACH(id, c->syscall_filter, j) {
2307 _cleanup_free_ char *name = NULL;
2308
2309 if (first)
2310 first = false;
2311 else
2312 fputc(' ', f);
2313
57183d11 2314 name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1);
17df7223
LP		 2315 fputs(strna(name), f);
2316 }
351a19b1 2317#endif
17df7223
LP		 2318
2319 fputc('\n', f);
2320 }
2321
57183d11
LP		 2322 if (c->syscall_archs) {
2323#ifdef HAVE_SECCOMP
2324 Iterator j;
2325 void *id;
2326#endif
2327
2328 fprintf(f,
2329 "%sSystemCallArchitectures:",
2330 prefix);
2331
2332#ifdef HAVE_SECCOMP
2333 SET_FOREACH(id, c->syscall_archs, j)
2334 fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1)));
2335#endif
2336 fputc('\n', f);
2337 }
2338
17df7223
LP		 2339 if (c->syscall_errno != 0)
2340 fprintf(f,
2341 "%sSystemCallErrorNumber: %s\n",
2342 prefix, strna(errno_to_name(c->syscall_errno)));
eef65bf3
MS		 2343
2344 if (c->apparmor_profile)
2345 fprintf(f,
2346 "%sAppArmorProfile: %s%s\n",
2347 prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile);
5cb5a6ff
LP		 2348}
2349
b58b4116 2350void exec_status_start(ExecStatus *s, pid_t pid) {
034c6ed7 2351 assert(s);
5cb5a6ff 2352
b58b4116
LP		 2353 zero(*s);
2354 s->pid = pid;
2355 dual_timestamp_get(&s->start_timestamp);
2356}
2357
6ea832a2 2358void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) {
b58b4116
LP		 2359 assert(s);
2360
0b1f4ae6 2361 if (s->pid && s->pid != pid)
b58b4116
LP		 2362 zero(*s);
2363
034c6ed7 2364 s->pid = pid;
63983207 2365 dual_timestamp_get(&s->exit_timestamp);
9fb86720 2366
034c6ed7
LP		 2367 s->code = code;
2368 s->status = status;
169c1bda 2369
6ea832a2
LP		 2370 if (context) {
2371 if (context->utmp_id)
2372 utmp_put_dead_process(context->utmp_id, pid, code, status);
2373
2374 exec_context_tty_reset(context);
2375 }
9fb86720
LP		 2376}
2377
2378void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
2379 char buf[FORMAT_TIMESTAMP_MAX];
2380
2381 assert(s);
2382 assert(f);
2383
2384 if (!prefix)
2385 prefix = "";
2386
2387 if (s->pid <= 0)
2388 return;
2389
2390 fprintf(f,
ccd06097
ZJS		 2391 "%sPID: "PID_FMT"\n",
2392 prefix, s->pid);
9fb86720 2393
63983207 2394 if (s->start_timestamp.realtime > 0)
9fb86720
LP		 2395 fprintf(f,
2396 "%sStart Timestamp: %s\n",
63983207 2397 prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime));
9fb86720 2398
63983207 2399 if (s->exit_timestamp.realtime > 0)
9fb86720
LP		 2400 fprintf(f,
2401 "%sExit Timestamp: %s\n"
2402 "%sExit Code: %s\n"
2403 "%sExit Status: %i\n",
63983207 2404 prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime),
9fb86720
LP		 2405 prefix, sigchld_code_to_string(s->code),
2406 prefix, s->status);
5cb5a6ff 2407}
44d8db9e 2408
9e2f7c11 2409char *exec_command_line(char **argv) {
44d8db9e
LP		 2410 size_t k;
2411 char *n, *p, **a;
2412 bool first = true;
2413
9e2f7c11 2414 assert(argv);
44d8db9e 2415
9164977d 2416 k = 1;
9e2f7c11 2417 STRV_FOREACH(a, argv)
44d8db9e
LP		 2418 k += strlen(*a)+3;
2419
2420 if (!(n = new(char, k)))
2421 return NULL;
2422
2423 p = n;
9e2f7c11 2424 STRV_FOREACH(a, argv) {
44d8db9e
LP		 2425
2426 if (!first)
2427 *(p++) = ' ';
2428 else
2429 first = false;
2430
2431 if (strpbrk(*a, WHITESPACE)) {
2432 *(p++) = '\'';
2433 p = stpcpy(p, *a);
2434 *(p++) = '\'';
2435 } else
2436 p = stpcpy(p, *a);
2437
2438 }
2439
9164977d
LP		 2440 *p = 0;
2441
44d8db9e
LP		 2442 /* FIXME: this doesn't really handle arguments that have
2443 * spaces and ticks in them */
2444
2445 return n;
2446}
2447
2448void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
9fb86720
LP		 2449 char *p2;
2450 const char *prefix2;
2451
44d8db9e
LP		 2452 char *cmd;
2453
2454 assert(c);
2455 assert(f);
2456
2457 if (!prefix)
2458 prefix = "";
9fb86720
LP		 2459 p2 = strappend(prefix, "\t");
2460 prefix2 = p2 ? p2 : prefix;
44d8db9e 2461
9e2f7c11 2462 cmd = exec_command_line(c->argv);
44d8db9e
LP		 2463
2464 fprintf(f,
2465 "%sCommand Line: %s\n",
2466 prefix, cmd ? cmd : strerror(ENOMEM));
2467
2468 free(cmd);
9fb86720
LP		 2469
2470 exec_status_dump(&c->exec_status, f, prefix2);
2471
2472 free(p2);
44d8db9e
LP		 2473}
2474
2475void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
2476 assert(f);
2477
2478 if (!prefix)
2479 prefix = "";
2480
2481 LIST_FOREACH(command, c, c)
2482 exec_command_dump(c, f, prefix);
2483}
94f04347 2484
a6a80b4f
LP		 2485void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
2486 ExecCommand *end;
2487
2488 assert(l);
2489 assert(e);
2490
2491 if (*l) {
35b8ca3a 2492 /* It's kind of important, that we keep the order here */
71fda00f
LP		 2493 LIST_FIND_TAIL(command, *l, end);
2494 LIST_INSERT_AFTER(command, *l, end, e);
a6a80b4f
LP		 2495 } else
2496 *l = e;
2497}
2498
26fd040d
LP		 2499int exec_command_set(ExecCommand *c, const char *path, ...) {
2500 va_list ap;
2501 char **l, *p;
2502
2503 assert(c);
2504 assert(path);
2505
2506 va_start(ap, path);
2507 l = strv_new_ap(path, ap);
2508 va_end(ap);
2509
2510 if (!l)
2511 return -ENOMEM;
2512
250a918d
LP		 2513 p = strdup(path);
2514 if (!p) {
26fd040d
LP		 2515 strv_free(l);
2516 return -ENOMEM;
2517 }
2518
2519 free(c->path);
2520 c->path = p;
2521
2522 strv_free(c->argv);
2523 c->argv = l;
2524
2525 return 0;
2526}
2527
613b411c
LP		 2528static int exec_runtime_allocate(ExecRuntime **rt) {
2529
2530 if (*rt)
2531 return 0;
2532
2533 *rt = new0(ExecRuntime, 1);
f146f5e1 2534 if (!*rt)
613b411c
LP		 2535 return -ENOMEM;
2536
2537 (*rt)->n_ref = 1;
2538 (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1;
2539
2540 return 0;
2541}
2542
2543int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) {
2544 int r;
2545
2546 assert(rt);
2547 assert(c);
2548 assert(id);
2549
2550 if (*rt)
2551 return 1;
2552
2553 if (!c->private_network && !c->private_tmp)
2554 return 0;
2555
2556 r = exec_runtime_allocate(rt);
2557 if (r < 0)
2558 return r;
2559
2560 if (c->private_network && (*rt)->netns_storage_socket[0] < 0) {
2561 if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0)
2562 return -errno;
2563 }
2564
2565 if (c->private_tmp && !(*rt)->tmp_dir) {
2566 r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir);
2567 if (r < 0)
2568 return r;
2569 }
2570
2571 return 1;
2572}
2573
2574ExecRuntime *exec_runtime_ref(ExecRuntime *r) {
2575 assert(r);
2576 assert(r->n_ref > 0);
2577
2578 r->n_ref++;
2579 return r;
2580}
2581
2582ExecRuntime *exec_runtime_unref(ExecRuntime *r) {
2583
2584 if (!r)
2585 return NULL;
2586
2587 assert(r->n_ref > 0);
2588
2589 r->n_ref--;
2590 if (r->n_ref <= 0) {
2591 free(r->tmp_dir);
2592 free(r->var_tmp_dir);
2593 close_pipe(r->netns_storage_socket);
2594 free(r);
2595 }
2596
2597 return NULL;
2598}
2599
2600int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds) {
2601 assert(u);
2602 assert(f);
2603 assert(fds);
2604
2605 if (!rt)
2606 return 0;
2607
2608 if (rt->tmp_dir)
2609 unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir);
2610
2611 if (rt->var_tmp_dir)
2612 unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir);
2613
2614 if (rt->netns_storage_socket[0] >= 0) {
2615 int copy;
2616
2617 copy = fdset_put_dup(fds, rt->netns_storage_socket[0]);
2618 if (copy < 0)
2619 return copy;
2620
2621 unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy);
2622 }
2623
2624 if (rt->netns_storage_socket[1] >= 0) {
2625 int copy;
2626
2627 copy = fdset_put_dup(fds, rt->netns_storage_socket[1]);
2628 if (copy < 0)
2629 return copy;
2630
2631 unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy);
2632 }
2633
2634 return 0;
2635}
2636
2637int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds) {
2638 int r;
2639
2640 assert(rt);
2641 assert(key);
2642 assert(value);
2643
2644 if (streq(key, "tmp-dir")) {
2645 char *copy;
2646
2647 r = exec_runtime_allocate(rt);
2648 if (r < 0)
2649 return r;
2650
2651 copy = strdup(value);
2652 if (!copy)
2653 return log_oom();
2654
2655 free((*rt)->tmp_dir);
2656 (*rt)->tmp_dir = copy;
2657
2658 } else if (streq(key, "var-tmp-dir")) {
2659 char *copy;
2660
2661 r = exec_runtime_allocate(rt);
2662 if (r < 0)
2663 return r;
2664
2665 copy = strdup(value);
2666 if (!copy)
2667 return log_oom();
2668
2669 free((*rt)->var_tmp_dir);
2670 (*rt)->var_tmp_dir = copy;
2671
2672 } else if (streq(key, "netns-socket-0")) {
2673 int fd;
2674
2675 r = exec_runtime_allocate(rt);
2676 if (r < 0)
2677 return r;
2678
2679 if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd))
2680 log_debug_unit(u->id, "Failed to parse netns socket value %s", value);
2681 else {
2682 if ((*rt)->netns_storage_socket[0] >= 0)
2683 close_nointr_nofail((*rt)->netns_storage_socket[0]);
2684
2685 (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd);
2686 }
2687 } else if (streq(key, "netns-socket-1")) {
2688 int fd;
2689
2690 r = exec_runtime_allocate(rt);
2691 if (r < 0)
2692 return r;
2693
2694 if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd))
2695 log_debug_unit(u->id, "Failed to parse netns socket value %s", value);
2696 else {
2697 if ((*rt)->netns_storage_socket[1] >= 0)
2698 close_nointr_nofail((*rt)->netns_storage_socket[1]);
2699
2700 (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd);
2701 }
2702 } else
2703 return 0;
2704
2705 return 1;
2706}
2707
2708static void *remove_tmpdir_thread(void *p) {
2709 _cleanup_free_ char *path = p;
2710
2711 rm_rf_dangerous(path, false, true, false);
2712 return NULL;
2713}
2714
2715void exec_runtime_destroy(ExecRuntime *rt) {
2716 if (!rt)
2717 return;
2718
2719 /* If there are multiple users of this, let's leave the stuff around */
2720 if (rt->n_ref > 1)
2721 return;
2722
2723 if (rt->tmp_dir) {
2724 log_debug("Spawning thread to nuke %s", rt->tmp_dir);
2725 asynchronous_job(remove_tmpdir_thread, rt->tmp_dir);
2726 rt->tmp_dir = NULL;
2727 }
2728
2729 if (rt->var_tmp_dir) {
2730 log_debug("Spawning thread to nuke %s", rt->var_tmp_dir);
2731 asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir);
2732 rt->var_tmp_dir = NULL;
2733 }
2734
2735 close_pipe(rt->netns_storage_socket);
2736}
2737
80876c20
LP		 2738static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
2739 [EXEC_INPUT_NULL] = "null",
2740 [EXEC_INPUT_TTY] = "tty",
2741 [EXEC_INPUT_TTY_FORCE] = "tty-force",
4f2d528d
LP		 2742 [EXEC_INPUT_TTY_FAIL] = "tty-fail",
2743 [EXEC_INPUT_SOCKET] = "socket"
80876c20
LP		 2744};
2745
8a0867d6
LP		 2746DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
2747
94f04347 2748static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
80876c20 2749 [EXEC_OUTPUT_INHERIT] = "inherit",
94f04347 2750 [EXEC_OUTPUT_NULL] = "null",
80876c20 2751 [EXEC_OUTPUT_TTY] = "tty",
94f04347 2752 [EXEC_OUTPUT_SYSLOG] = "syslog",
28dbc1e8 2753 [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console",
9a6bca7a 2754 [EXEC_OUTPUT_KMSG] = "kmsg",
28dbc1e8 2755 [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console",
706343f4
LP		 2756 [EXEC_OUTPUT_JOURNAL] = "journal",
2757 [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console",
4f2d528d 2758 [EXEC_OUTPUT_SOCKET] = "socket"
94f04347
LP		 2759};
2760
2761DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
Unnamed repository; edit this file 'description' to name the repository.