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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a7334b09 | 2 | |
034c6ed7 LP |
3 | #include <errno.h> |
4 | #include <fcntl.h> | |
8dd4c05b | 5 | #include <poll.h> |
d251207d | 6 | #include <sys/eventfd.h> |
ac8db36c | 7 | #include <sys/file.h> |
f5947a5e | 8 | #include <sys/ioctl.h> |
f3e43635 | 9 | #include <sys/mman.h> |
8dd4c05b | 10 | #include <sys/personality.h> |
94f04347 | 11 | #include <sys/prctl.h> |
d2ffa389 | 12 | #include <sys/shm.h> |
d2ffa389 | 13 | #include <sys/types.h> |
8dd4c05b LP |
14 | #include <sys/un.h> |
15 | #include <unistd.h> | |
023a4f67 | 16 | #include <utmpx.h> |
5cb5a6ff | 17 | |
9c0c6701 DDM |
18 | #include <linux/fs.h> /* Must be included after <sys/mount.h> */ |
19 | ||
349cc4a5 | 20 | #if HAVE_PAM |
5b6319dc LP |
21 | #include <security/pam_appl.h> |
22 | #endif | |
23 | ||
349cc4a5 | 24 | #if HAVE_SELINUX |
7b52a628 MS |
25 | #include <selinux/selinux.h> |
26 | #endif | |
27 | ||
349cc4a5 | 28 | #if HAVE_APPARMOR |
eef65bf3 MS |
29 | #include <sys/apparmor.h> |
30 | #endif | |
31 | ||
24882e06 | 32 | #include "sd-messages.h" |
8dd4c05b LP |
33 | |
34 | #include "af-list.h" | |
b5efdb8a | 35 | #include "alloc-util.h" |
349cc4a5 | 36 | #if HAVE_APPARMOR |
3ffd4af2 LP |
37 | #include "apparmor-util.h" |
38 | #endif | |
ee617a4e | 39 | #include "argv-util.h" |
8dd4c05b LP |
40 | #include "async.h" |
41 | #include "barrier.h" | |
b1994387 | 42 | #include "bpf-lsm.h" |
9c0c6701 | 43 | #include "btrfs-util.h" |
8dd4c05b | 44 | #include "cap-list.h" |
430f0182 | 45 | #include "capability-util.h" |
9c0c6701 | 46 | #include "chattr-util.h" |
fdb3deca | 47 | #include "cgroup-setup.h" |
f461a28d | 48 | #include "chase.h" |
bb0c0d6f | 49 | #include "chown-recursive.h" |
28db6fbf | 50 | #include "constants.h" |
da681e1b | 51 | #include "cpu-set-util.h" |
6a818c3c | 52 | #include "data-fd-util.h" |
686d13b9 | 53 | #include "env-file.h" |
4d1a6904 | 54 | #include "env-util.h" |
17df7223 | 55 | #include "errno-list.h" |
8a62620e | 56 | #include "escape.h" |
43962c30 | 57 | #include "exec-credential.h" |
3ffd4af2 | 58 | #include "execute.h" |
8dd4c05b | 59 | #include "exit-status.h" |
3ffd4af2 | 60 | #include "fd-util.h" |
f97b34a6 | 61 | #include "format-util.h" |
7d50b32a | 62 | #include "glob-util.h" |
0389f4fa | 63 | #include "hexdecoct.h" |
c004493c | 64 | #include "io-util.h" |
032b3afb | 65 | #include "ioprio-util.h" |
9c0c6701 | 66 | #include "lock-util.h" |
8dd4c05b LP |
67 | #include "log.h" |
68 | #include "macro.h" | |
e8a565cb | 69 | #include "manager.h" |
2a341bb9 | 70 | #include "manager-dump.h" |
0a970718 | 71 | #include "memory-util.h" |
f5947a5e | 72 | #include "missing_fs.h" |
5bead76e | 73 | #include "missing_ioprio.h" |
7a114ed4 | 74 | #include "missing_prctl.h" |
35cd0ba5 | 75 | #include "mkdir-label.h" |
8dd4c05b | 76 | #include "namespace.h" |
6bedfcbb | 77 | #include "parse-util.h" |
8dd4c05b | 78 | #include "path-util.h" |
4d62ee55 | 79 | #include "proc-cmdline.h" |
0b452006 | 80 | #include "process-util.h" |
6bb00842 | 81 | #include "psi-util.h" |
78f22b97 | 82 | #include "rlimit-util.h" |
8dd4c05b | 83 | #include "rm-rf.h" |
3ffd4af2 | 84 | #include "seccomp-util.h" |
07d46372 | 85 | #include "securebits-util.h" |
8dd4c05b | 86 | #include "selinux-util.h" |
24882e06 | 87 | #include "signal-util.h" |
8dd4c05b | 88 | #include "smack-util.h" |
57b7a260 | 89 | #include "socket-util.h" |
a2ab603c | 90 | #include "sort-util.h" |
fd63e712 | 91 | #include "special.h" |
949befd3 | 92 | #include "stat-util.h" |
8b43440b | 93 | #include "string-table.h" |
07630cea | 94 | #include "string-util.h" |
8dd4c05b | 95 | #include "strv.h" |
7ccbd1ae | 96 | #include "syslog-util.h" |
8dd4c05b | 97 | #include "terminal-util.h" |
bb0c0d6f | 98 | #include "tmpfile-util.h" |
566b7d23 | 99 | #include "umask-util.h" |
2d3b784d | 100 | #include "unit-serialize.h" |
b1d4f8e1 | 101 | #include "user-util.h" |
8dd4c05b | 102 | #include "utmp-wtmp.h" |
5cb5a6ff | 103 | |
e056b01d | 104 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 105 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 106 | |
531dca78 LP |
107 | #define SNDBUF_SIZE (8*1024*1024) |
108 | ||
da6053d0 | 109 | static int shift_fds(int fds[], size_t n_fds) { |
034c6ed7 LP |
110 | if (n_fds <= 0) |
111 | return 0; | |
112 | ||
a0d40ac5 LP |
113 | /* Modifies the fds array! (sorts it) */ |
114 | ||
034c6ed7 LP |
115 | assert(fds); |
116 | ||
5b10116e ZJS |
117 | for (int start = 0;;) { |
118 | int restart_from = -1; | |
034c6ed7 | 119 | |
5b10116e | 120 | for (int i = start; i < (int) n_fds; i++) { |
034c6ed7 LP |
121 | int nfd; |
122 | ||
123 | /* Already at right index? */ | |
124 | if (fds[i] == i+3) | |
125 | continue; | |
126 | ||
3cc2aff1 LP |
127 | nfd = fcntl(fds[i], F_DUPFD, i + 3); |
128 | if (nfd < 0) | |
034c6ed7 LP |
129 | return -errno; |
130 | ||
03e334a1 | 131 | safe_close(fds[i]); |
034c6ed7 LP |
132 | fds[i] = nfd; |
133 | ||
134 | /* Hmm, the fd we wanted isn't free? Then | |
ee33e53a | 135 | * let's remember that and try again from here */ |
034c6ed7 LP |
136 | if (nfd != i+3 && restart_from < 0) |
137 | restart_from = i; | |
138 | } | |
139 | ||
140 | if (restart_from < 0) | |
141 | break; | |
142 | ||
143 | start = restart_from; | |
144 | } | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
cd48e23f RP |
149 | static int flags_fds( |
150 | const int fds[], | |
151 | size_t n_socket_fds, | |
152 | size_t n_fds, | |
153 | bool nonblock) { | |
154 | ||
e2c76839 | 155 | int r; |
47a71eed LP |
156 | |
157 | if (n_fds <= 0) | |
158 | return 0; | |
159 | ||
160 | assert(fds); | |
161 | ||
9b141911 FB |
162 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags. |
163 | * O_NONBLOCK only applies to socket activation though. */ | |
47a71eed | 164 | |
5b10116e | 165 | for (size_t i = 0; i < n_fds; i++) { |
47a71eed | 166 | |
9b141911 FB |
167 | if (i < n_socket_fds) { |
168 | r = fd_nonblock(fds[i], nonblock); | |
169 | if (r < 0) | |
170 | return r; | |
171 | } | |
47a71eed | 172 | |
451a074f LP |
173 | /* We unconditionally drop FD_CLOEXEC from the fds, |
174 | * since after all we want to pass these fds to our | |
175 | * children */ | |
47a71eed | 176 | |
3cc2aff1 LP |
177 | r = fd_cloexec(fds[i], false); |
178 | if (r < 0) | |
e2c76839 | 179 | return r; |
47a71eed LP |
180 | } |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
1e22b5cd | 185 | static const char *exec_context_tty_path(const ExecContext *context) { |
80876c20 LP |
186 | assert(context); |
187 | ||
1e22b5cd LP |
188 | if (context->stdio_as_fds) |
189 | return NULL; | |
190 | ||
80876c20 LP |
191 | if (context->tty_path) |
192 | return context->tty_path; | |
193 | ||
194 | return "/dev/console"; | |
195 | } | |
196 | ||
4d62ee55 | 197 | static int exec_context_tty_size(const ExecContext *context, unsigned *ret_rows, unsigned *ret_cols) { |
4d62ee55 DDM |
198 | unsigned rows, cols; |
199 | const char *tty; | |
4d62ee55 DDM |
200 | |
201 | assert(context); | |
202 | assert(ret_rows); | |
203 | assert(ret_cols); | |
204 | ||
205 | rows = context->tty_rows; | |
206 | cols = context->tty_cols; | |
207 | ||
208 | tty = exec_context_tty_path(context); | |
29f5a5ae DDM |
209 | if (tty) |
210 | (void) proc_cmdline_tty_size(tty, rows == UINT_MAX ? &rows : NULL, cols == UINT_MAX ? &cols : NULL); | |
4d62ee55 DDM |
211 | |
212 | *ret_rows = rows; | |
213 | *ret_cols = cols; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
1e22b5cd | 218 | static void exec_context_tty_reset(const ExecContext *context, const ExecParameters *p) { |
a0043bfa ZJS |
219 | _cleanup_close_ int fd = -EBADF; |
220 | const char *path = exec_context_tty_path(ASSERT_PTR(context)); | |
1e22b5cd | 221 | |
a0043bfa ZJS |
222 | /* Take a lock around the device for the duration of the setup that we do here. |
223 | * systemd-vconsole-setup.service also takes the lock to avoid being interrupted. | |
224 | * We open a new fd that will be closed automatically, and operate on it for convenience. | |
225 | */ | |
6ea832a2 | 226 | |
a0043bfa ZJS |
227 | if (p && p->stdin_fd >= 0) { |
228 | fd = xopenat_lock(p->stdin_fd, NULL, | |
229 | O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY, 0, 0, LOCK_BSD, LOCK_EX); | |
230 | if (fd < 0) | |
231 | return; | |
232 | } else if (path) { | |
233 | fd = open_terminal(path, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK); | |
234 | if (fd < 0) | |
235 | return; | |
6ea832a2 | 236 | |
a0043bfa ZJS |
237 | if (lock_generic(fd, LOCK_BSD, LOCK_EX) < 0) |
238 | return; | |
239 | } else | |
240 | return; /* nothing to do */ | |
6ea832a2 | 241 | |
a0043bfa ZJS |
242 | if (context->tty_vhangup) |
243 | (void) terminal_vhangup_fd(fd); | |
244 | ||
245 | if (context->tty_reset) | |
246 | (void) reset_terminal_fd(fd, true); | |
1e22b5cd | 247 | |
4d62ee55 DDM |
248 | if (p && p->stdin_fd >= 0) { |
249 | unsigned rows = context->tty_rows, cols = context->tty_cols; | |
250 | ||
251 | (void) exec_context_tty_size(context, &rows, &cols); | |
252 | (void) terminal_set_size_fd(p->stdin_fd, path, rows, cols); | |
253 | } | |
51462135 | 254 | |
1e22b5cd LP |
255 | if (context->tty_vt_disallocate && path) |
256 | (void) vt_disallocate(path); | |
6ea832a2 LP |
257 | } |
258 | ||
6af760f3 LP |
259 | static bool is_terminal_input(ExecInput i) { |
260 | return IN_SET(i, | |
261 | EXEC_INPUT_TTY, | |
262 | EXEC_INPUT_TTY_FORCE, | |
263 | EXEC_INPUT_TTY_FAIL); | |
264 | } | |
265 | ||
3a1286b6 | 266 | static bool is_terminal_output(ExecOutput o) { |
6af760f3 LP |
267 | return IN_SET(o, |
268 | EXEC_OUTPUT_TTY, | |
6af760f3 LP |
269 | EXEC_OUTPUT_KMSG_AND_CONSOLE, |
270 | EXEC_OUTPUT_JOURNAL_AND_CONSOLE); | |
271 | } | |
272 | ||
aac8c0c3 LP |
273 | static bool is_kmsg_output(ExecOutput o) { |
274 | return IN_SET(o, | |
275 | EXEC_OUTPUT_KMSG, | |
276 | EXEC_OUTPUT_KMSG_AND_CONSOLE); | |
277 | } | |
278 | ||
6af760f3 LP |
279 | static bool exec_context_needs_term(const ExecContext *c) { |
280 | assert(c); | |
281 | ||
282 | /* Return true if the execution context suggests we should set $TERM to something useful. */ | |
283 | ||
284 | if (is_terminal_input(c->std_input)) | |
285 | return true; | |
286 | ||
287 | if (is_terminal_output(c->std_output)) | |
288 | return true; | |
289 | ||
290 | if (is_terminal_output(c->std_error)) | |
291 | return true; | |
292 | ||
293 | return !!c->tty_path; | |
3a1286b6 MS |
294 | } |
295 | ||
80876c20 | 296 | static int open_null_as(int flags, int nfd) { |
046a82c1 | 297 | int fd; |
071830ff | 298 | |
80876c20 | 299 | assert(nfd >= 0); |
071830ff | 300 | |
613b411c LP |
301 | fd = open("/dev/null", flags|O_NOCTTY); |
302 | if (fd < 0) | |
071830ff LP |
303 | return -errno; |
304 | ||
046a82c1 | 305 | return move_fd(fd, nfd, false); |
071830ff LP |
306 | } |
307 | ||
91dd5f7c LP |
308 | static int connect_journal_socket( |
309 | int fd, | |
310 | const char *log_namespace, | |
311 | uid_t uid, | |
312 | gid_t gid) { | |
313 | ||
524daa8c ZJS |
314 | uid_t olduid = UID_INVALID; |
315 | gid_t oldgid = GID_INVALID; | |
91dd5f7c | 316 | const char *j; |
524daa8c ZJS |
317 | int r; |
318 | ||
91dd5f7c LP |
319 | j = log_namespace ? |
320 | strjoina("/run/systemd/journal.", log_namespace, "/stdout") : | |
321 | "/run/systemd/journal/stdout"; | |
91dd5f7c | 322 | |
cad93f29 | 323 | if (gid_is_valid(gid)) { |
524daa8c ZJS |
324 | oldgid = getgid(); |
325 | ||
92a17af9 | 326 | if (setegid(gid) < 0) |
524daa8c ZJS |
327 | return -errno; |
328 | } | |
329 | ||
cad93f29 | 330 | if (uid_is_valid(uid)) { |
524daa8c ZJS |
331 | olduid = getuid(); |
332 | ||
92a17af9 | 333 | if (seteuid(uid) < 0) { |
524daa8c ZJS |
334 | r = -errno; |
335 | goto restore_gid; | |
336 | } | |
337 | } | |
338 | ||
1861986a | 339 | r = connect_unix_path(fd, AT_FDCWD, j); |
524daa8c | 340 | |
1861986a LP |
341 | /* If we fail to restore the uid or gid, things will likely fail later on. This should only happen if |
342 | an LSM interferes. */ | |
524daa8c | 343 | |
cad93f29 | 344 | if (uid_is_valid(uid)) |
524daa8c ZJS |
345 | (void) seteuid(olduid); |
346 | ||
347 | restore_gid: | |
cad93f29 | 348 | if (gid_is_valid(gid)) |
524daa8c ZJS |
349 | (void) setegid(oldgid); |
350 | ||
351 | return r; | |
352 | } | |
353 | ||
fd1f9c89 | 354 | static int connect_logger_as( |
34cf6c43 | 355 | const Unit *unit, |
fd1f9c89 | 356 | const ExecContext *context, |
af635cf3 | 357 | const ExecParameters *params, |
fd1f9c89 LP |
358 | ExecOutput output, |
359 | const char *ident, | |
fd1f9c89 LP |
360 | int nfd, |
361 | uid_t uid, | |
362 | gid_t gid) { | |
363 | ||
254d1313 | 364 | _cleanup_close_ int fd = -EBADF; |
2ac1ff68 | 365 | int r; |
071830ff LP |
366 | |
367 | assert(context); | |
af635cf3 | 368 | assert(params); |
80876c20 LP |
369 | assert(output < _EXEC_OUTPUT_MAX); |
370 | assert(ident); | |
371 | assert(nfd >= 0); | |
071830ff | 372 | |
54fe0cdb LP |
373 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
374 | if (fd < 0) | |
80876c20 | 375 | return -errno; |
071830ff | 376 | |
91dd5f7c | 377 | r = connect_journal_socket(fd, context->log_namespace, uid, gid); |
524daa8c ZJS |
378 | if (r < 0) |
379 | return r; | |
071830ff | 380 | |
2ac1ff68 | 381 | if (shutdown(fd, SHUT_RD) < 0) |
80876c20 | 382 | return -errno; |
071830ff | 383 | |
fd1f9c89 | 384 | (void) fd_inc_sndbuf(fd, SNDBUF_SIZE); |
531dca78 | 385 | |
2ac1ff68 | 386 | if (dprintf(fd, |
62bca2c6 | 387 | "%s\n" |
80876c20 LP |
388 | "%s\n" |
389 | "%i\n" | |
54fe0cdb LP |
390 | "%i\n" |
391 | "%i\n" | |
392 | "%i\n" | |
4f4a1dbf | 393 | "%i\n", |
c867611e | 394 | context->syslog_identifier ?: ident, |
af635cf3 | 395 | params->flags & EXEC_PASS_LOG_UNIT ? unit->id : "", |
54fe0cdb LP |
396 | context->syslog_priority, |
397 | !!context->syslog_level_prefix, | |
f3dc6af2 | 398 | false, |
aac8c0c3 | 399 | is_kmsg_output(output), |
2ac1ff68 EV |
400 | is_terminal_output(output)) < 0) |
401 | return -errno; | |
80876c20 | 402 | |
2ac1ff68 | 403 | return move_fd(TAKE_FD(fd), nfd, false); |
80876c20 | 404 | } |
2ac1ff68 | 405 | |
3a274a21 | 406 | static int open_terminal_as(const char *path, int flags, int nfd) { |
046a82c1 | 407 | int fd; |
071830ff | 408 | |
80876c20 LP |
409 | assert(path); |
410 | assert(nfd >= 0); | |
fd1f9c89 | 411 | |
3a274a21 | 412 | fd = open_terminal(path, flags | O_NOCTTY); |
3cc2aff1 | 413 | if (fd < 0) |
80876c20 | 414 | return fd; |
071830ff | 415 | |
046a82c1 | 416 | return move_fd(fd, nfd, false); |
80876c20 | 417 | } |
071830ff | 418 | |
2038c3f5 | 419 | static int acquire_path(const char *path, int flags, mode_t mode) { |
254d1313 | 420 | _cleanup_close_ int fd = -EBADF; |
86fca584 | 421 | int r; |
071830ff | 422 | |
80876c20 | 423 | assert(path); |
071830ff | 424 | |
2038c3f5 LP |
425 | if (IN_SET(flags & O_ACCMODE, O_WRONLY, O_RDWR)) |
426 | flags |= O_CREAT; | |
427 | ||
428 | fd = open(path, flags|O_NOCTTY, mode); | |
429 | if (fd >= 0) | |
15a3e96f | 430 | return TAKE_FD(fd); |
071830ff | 431 | |
2038c3f5 LP |
432 | if (errno != ENXIO) /* ENXIO is returned when we try to open() an AF_UNIX file system socket on Linux */ |
433 | return -errno; | |
2038c3f5 LP |
434 | |
435 | /* So, it appears the specified path could be an AF_UNIX socket. Let's see if we can connect to it. */ | |
436 | ||
437 | fd = socket(AF_UNIX, SOCK_STREAM, 0); | |
438 | if (fd < 0) | |
439 | return -errno; | |
440 | ||
1861986a LP |
441 | r = connect_unix_path(fd, AT_FDCWD, path); |
442 | if (IN_SET(r, -ENOTSOCK, -EINVAL)) | |
443 | /* Propagate initial error if we get ENOTSOCK or EINVAL, i.e. we have indication that this | |
444 | * wasn't an AF_UNIX socket after all */ | |
445 | return -ENXIO; | |
446 | if (r < 0) | |
447 | return r; | |
071830ff | 448 | |
2038c3f5 LP |
449 | if ((flags & O_ACCMODE) == O_RDONLY) |
450 | r = shutdown(fd, SHUT_WR); | |
451 | else if ((flags & O_ACCMODE) == O_WRONLY) | |
452 | r = shutdown(fd, SHUT_RD); | |
453 | else | |
86fca584 | 454 | r = 0; |
15a3e96f | 455 | if (r < 0) |
2038c3f5 | 456 | return -errno; |
2038c3f5 | 457 | |
15a3e96f | 458 | return TAKE_FD(fd); |
80876c20 | 459 | } |
071830ff | 460 | |
08f3be7a LP |
461 | static int fixup_input( |
462 | const ExecContext *context, | |
463 | int socket_fd, | |
464 | bool apply_tty_stdin) { | |
465 | ||
466 | ExecInput std_input; | |
467 | ||
468 | assert(context); | |
469 | ||
470 | std_input = context->std_input; | |
1e3ad081 LP |
471 | |
472 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
473 | return EXEC_INPUT_NULL; | |
071830ff | 474 | |
03fd9c49 | 475 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
476 | return EXEC_INPUT_NULL; |
477 | ||
08f3be7a LP |
478 | if (std_input == EXEC_INPUT_DATA && context->stdin_data_size == 0) |
479 | return EXEC_INPUT_NULL; | |
480 | ||
03fd9c49 | 481 | return std_input; |
4f2d528d LP |
482 | } |
483 | ||
7966a916 | 484 | static int fixup_output(ExecOutput output, int socket_fd) { |
4f2d528d | 485 | |
7966a916 | 486 | if (output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
487 | return EXEC_OUTPUT_INHERIT; |
488 | ||
7966a916 | 489 | return output; |
4f2d528d LP |
490 | } |
491 | ||
a34ceba6 LP |
492 | static int setup_input( |
493 | const ExecContext *context, | |
494 | const ExecParameters *params, | |
52c239d7 | 495 | int socket_fd, |
2caa38e9 | 496 | const int named_iofds[static 3]) { |
a34ceba6 | 497 | |
4f2d528d | 498 | ExecInput i; |
51462135 | 499 | int r; |
4f2d528d LP |
500 | |
501 | assert(context); | |
a34ceba6 | 502 | assert(params); |
2caa38e9 | 503 | assert(named_iofds); |
a34ceba6 LP |
504 | |
505 | if (params->stdin_fd >= 0) { | |
506 | if (dup2(params->stdin_fd, STDIN_FILENO) < 0) | |
507 | return -errno; | |
508 | ||
509 | /* Try to make this the controlling tty, if it is a tty, and reset it */ | |
1fb0682e | 510 | if (isatty(STDIN_FILENO)) { |
4d62ee55 DDM |
511 | unsigned rows = context->tty_rows, cols = context->tty_cols; |
512 | ||
513 | (void) exec_context_tty_size(context, &rows, &cols); | |
1fb0682e LP |
514 | (void) ioctl(STDIN_FILENO, TIOCSCTTY, context->std_input == EXEC_INPUT_TTY_FORCE); |
515 | (void) reset_terminal_fd(STDIN_FILENO, true); | |
4d62ee55 | 516 | (void) terminal_set_size_fd(STDIN_FILENO, NULL, rows, cols); |
1fb0682e | 517 | } |
a34ceba6 LP |
518 | |
519 | return STDIN_FILENO; | |
520 | } | |
4f2d528d | 521 | |
08f3be7a | 522 | i = fixup_input(context, socket_fd, params->flags & EXEC_APPLY_TTY_STDIN); |
4f2d528d LP |
523 | |
524 | switch (i) { | |
071830ff | 525 | |
80876c20 LP |
526 | case EXEC_INPUT_NULL: |
527 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
528 | ||
529 | case EXEC_INPUT_TTY: | |
530 | case EXEC_INPUT_TTY_FORCE: | |
531 | case EXEC_INPUT_TTY_FAIL: { | |
4d62ee55 | 532 | unsigned rows, cols; |
046a82c1 | 533 | int fd; |
071830ff | 534 | |
1e22b5cd | 535 | fd = acquire_terminal(exec_context_tty_path(context), |
8854d795 LP |
536 | i == EXEC_INPUT_TTY_FAIL ? ACQUIRE_TERMINAL_TRY : |
537 | i == EXEC_INPUT_TTY_FORCE ? ACQUIRE_TERMINAL_FORCE : | |
538 | ACQUIRE_TERMINAL_WAIT, | |
3a43da28 | 539 | USEC_INFINITY); |
970edce6 | 540 | if (fd < 0) |
80876c20 LP |
541 | return fd; |
542 | ||
4d62ee55 DDM |
543 | r = exec_context_tty_size(context, &rows, &cols); |
544 | if (r < 0) | |
545 | return r; | |
546 | ||
547 | r = terminal_set_size_fd(fd, exec_context_tty_path(context), rows, cols); | |
51462135 DDM |
548 | if (r < 0) |
549 | return r; | |
550 | ||
046a82c1 | 551 | return move_fd(fd, STDIN_FILENO, false); |
80876c20 LP |
552 | } |
553 | ||
4f2d528d | 554 | case EXEC_INPUT_SOCKET: |
e75a9ed1 LP |
555 | assert(socket_fd >= 0); |
556 | ||
7c248223 | 557 | return RET_NERRNO(dup2(socket_fd, STDIN_FILENO)); |
4f2d528d | 558 | |
52c239d7 | 559 | case EXEC_INPUT_NAMED_FD: |
e75a9ed1 LP |
560 | assert(named_iofds[STDIN_FILENO] >= 0); |
561 | ||
52c239d7 | 562 | (void) fd_nonblock(named_iofds[STDIN_FILENO], false); |
7c248223 | 563 | return RET_NERRNO(dup2(named_iofds[STDIN_FILENO], STDIN_FILENO)); |
52c239d7 | 564 | |
08f3be7a LP |
565 | case EXEC_INPUT_DATA: { |
566 | int fd; | |
567 | ||
568 | fd = acquire_data_fd(context->stdin_data, context->stdin_data_size, 0); | |
569 | if (fd < 0) | |
570 | return fd; | |
571 | ||
572 | return move_fd(fd, STDIN_FILENO, false); | |
573 | } | |
574 | ||
2038c3f5 LP |
575 | case EXEC_INPUT_FILE: { |
576 | bool rw; | |
577 | int fd; | |
578 | ||
579 | assert(context->stdio_file[STDIN_FILENO]); | |
580 | ||
581 | rw = (context->std_output == EXEC_OUTPUT_FILE && streq_ptr(context->stdio_file[STDIN_FILENO], context->stdio_file[STDOUT_FILENO])) || | |
582 | (context->std_error == EXEC_OUTPUT_FILE && streq_ptr(context->stdio_file[STDIN_FILENO], context->stdio_file[STDERR_FILENO])); | |
583 | ||
584 | fd = acquire_path(context->stdio_file[STDIN_FILENO], rw ? O_RDWR : O_RDONLY, 0666 & ~context->umask); | |
585 | if (fd < 0) | |
586 | return fd; | |
587 | ||
588 | return move_fd(fd, STDIN_FILENO, false); | |
589 | } | |
590 | ||
80876c20 | 591 | default: |
04499a70 | 592 | assert_not_reached(); |
80876c20 LP |
593 | } |
594 | } | |
595 | ||
41fc585a LP |
596 | static bool can_inherit_stderr_from_stdout( |
597 | const ExecContext *context, | |
598 | ExecOutput o, | |
599 | ExecOutput e) { | |
600 | ||
601 | assert(context); | |
602 | ||
603 | /* Returns true, if given the specified STDERR and STDOUT output we can directly dup() the stdout fd to the | |
604 | * stderr fd */ | |
605 | ||
606 | if (e == EXEC_OUTPUT_INHERIT) | |
607 | return true; | |
608 | if (e != o) | |
609 | return false; | |
610 | ||
611 | if (e == EXEC_OUTPUT_NAMED_FD) | |
612 | return streq_ptr(context->stdio_fdname[STDOUT_FILENO], context->stdio_fdname[STDERR_FILENO]); | |
613 | ||
8d7dab1f | 614 | if (IN_SET(e, EXEC_OUTPUT_FILE, EXEC_OUTPUT_FILE_APPEND, EXEC_OUTPUT_FILE_TRUNCATE)) |
41fc585a LP |
615 | return streq_ptr(context->stdio_file[STDOUT_FILENO], context->stdio_file[STDERR_FILENO]); |
616 | ||
617 | return true; | |
618 | } | |
619 | ||
a34ceba6 | 620 | static int setup_output( |
34cf6c43 | 621 | const Unit *unit, |
a34ceba6 LP |
622 | const ExecContext *context, |
623 | const ExecParameters *params, | |
624 | int fileno, | |
625 | int socket_fd, | |
2caa38e9 | 626 | const int named_iofds[static 3], |
a34ceba6 | 627 | const char *ident, |
7bce046b LP |
628 | uid_t uid, |
629 | gid_t gid, | |
630 | dev_t *journal_stream_dev, | |
631 | ino_t *journal_stream_ino) { | |
a34ceba6 | 632 | |
4f2d528d LP |
633 | ExecOutput o; |
634 | ExecInput i; | |
47c1d80d | 635 | int r; |
4f2d528d | 636 | |
f2341e0a | 637 | assert(unit); |
80876c20 | 638 | assert(context); |
a34ceba6 | 639 | assert(params); |
80876c20 | 640 | assert(ident); |
7bce046b LP |
641 | assert(journal_stream_dev); |
642 | assert(journal_stream_ino); | |
80876c20 | 643 | |
a34ceba6 LP |
644 | if (fileno == STDOUT_FILENO && params->stdout_fd >= 0) { |
645 | ||
646 | if (dup2(params->stdout_fd, STDOUT_FILENO) < 0) | |
647 | return -errno; | |
648 | ||
649 | return STDOUT_FILENO; | |
650 | } | |
651 | ||
652 | if (fileno == STDERR_FILENO && params->stderr_fd >= 0) { | |
653 | if (dup2(params->stderr_fd, STDERR_FILENO) < 0) | |
654 | return -errno; | |
655 | ||
656 | return STDERR_FILENO; | |
657 | } | |
658 | ||
08f3be7a | 659 | i = fixup_input(context, socket_fd, params->flags & EXEC_APPLY_TTY_STDIN); |
03fd9c49 | 660 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 661 | |
eb17e935 MS |
662 | if (fileno == STDERR_FILENO) { |
663 | ExecOutput e; | |
664 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 665 | |
eb17e935 MS |
666 | /* This expects the input and output are already set up */ |
667 | ||
668 | /* Don't change the stderr file descriptor if we inherit all | |
669 | * the way and are not on a tty */ | |
670 | if (e == EXEC_OUTPUT_INHERIT && | |
671 | o == EXEC_OUTPUT_INHERIT && | |
672 | i == EXEC_INPUT_NULL && | |
673 | !is_terminal_input(context->std_input) && | |
7966a916 | 674 | getppid() != 1) |
eb17e935 MS |
675 | return fileno; |
676 | ||
677 | /* Duplicate from stdout if possible */ | |
41fc585a | 678 | if (can_inherit_stderr_from_stdout(context, o, e)) |
7c248223 | 679 | return RET_NERRNO(dup2(STDOUT_FILENO, fileno)); |
071830ff | 680 | |
eb17e935 | 681 | o = e; |
80876c20 | 682 | |
eb17e935 | 683 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
684 | /* If input got downgraded, inherit the original value */ |
685 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
1e22b5cd | 686 | return open_terminal_as(exec_context_tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 687 | |
08f3be7a LP |
688 | /* If the input is connected to anything that's not a /dev/null or a data fd, inherit that... */ |
689 | if (!IN_SET(i, EXEC_INPUT_NULL, EXEC_INPUT_DATA)) | |
7c248223 | 690 | return RET_NERRNO(dup2(STDIN_FILENO, fileno)); |
071830ff | 691 | |
acb591e4 LP |
692 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
693 | if (getppid() != 1) | |
eb17e935 | 694 | return fileno; |
94f04347 | 695 | |
eb17e935 MS |
696 | /* We need to open /dev/null here anew, to get the right access mode. */ |
697 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 698 | } |
94f04347 | 699 | |
eb17e935 | 700 | switch (o) { |
80876c20 LP |
701 | |
702 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 703 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
704 | |
705 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 706 | if (is_terminal_input(i)) |
7c248223 | 707 | return RET_NERRNO(dup2(STDIN_FILENO, fileno)); |
80876c20 LP |
708 | |
709 | /* We don't reset the terminal if this is just about output */ | |
1e22b5cd | 710 | return open_terminal_as(exec_context_tty_path(context), O_WRONLY, fileno); |
80876c20 | 711 | |
9a6bca7a | 712 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 713 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
714 | case EXEC_OUTPUT_JOURNAL: |
715 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
af635cf3 | 716 | r = connect_logger_as(unit, context, params, o, ident, fileno, uid, gid); |
47c1d80d | 717 | if (r < 0) { |
7966a916 ZJS |
718 | log_unit_warning_errno(unit, r, "Failed to connect %s to the journal socket, ignoring: %m", |
719 | fileno == STDOUT_FILENO ? "stdout" : "stderr"); | |
eb17e935 | 720 | r = open_null_as(O_WRONLY, fileno); |
7bce046b LP |
721 | } else { |
722 | struct stat st; | |
723 | ||
724 | /* If we connected this fd to the journal via a stream, patch the device/inode into the passed | |
725 | * parameters, but only then. This is useful so that we can set $JOURNAL_STREAM that permits | |
ab2116b1 LP |
726 | * services to detect whether they are connected to the journal or not. |
727 | * | |
728 | * If both stdout and stderr are connected to a stream then let's make sure to store the data | |
729 | * about STDERR as that's usually the best way to do logging. */ | |
7bce046b | 730 | |
ab2116b1 LP |
731 | if (fstat(fileno, &st) >= 0 && |
732 | (*journal_stream_ino == 0 || fileno == STDERR_FILENO)) { | |
7bce046b LP |
733 | *journal_stream_dev = st.st_dev; |
734 | *journal_stream_ino = st.st_ino; | |
735 | } | |
47c1d80d MS |
736 | } |
737 | return r; | |
4f2d528d LP |
738 | |
739 | case EXEC_OUTPUT_SOCKET: | |
740 | assert(socket_fd >= 0); | |
e75a9ed1 | 741 | |
7c248223 | 742 | return RET_NERRNO(dup2(socket_fd, fileno)); |
94f04347 | 743 | |
52c239d7 | 744 | case EXEC_OUTPUT_NAMED_FD: |
e75a9ed1 LP |
745 | assert(named_iofds[fileno] >= 0); |
746 | ||
52c239d7 | 747 | (void) fd_nonblock(named_iofds[fileno], false); |
7c248223 | 748 | return RET_NERRNO(dup2(named_iofds[fileno], fileno)); |
52c239d7 | 749 | |
566b7d23 | 750 | case EXEC_OUTPUT_FILE: |
8d7dab1f LW |
751 | case EXEC_OUTPUT_FILE_APPEND: |
752 | case EXEC_OUTPUT_FILE_TRUNCATE: { | |
2038c3f5 | 753 | bool rw; |
566b7d23 | 754 | int fd, flags; |
2038c3f5 LP |
755 | |
756 | assert(context->stdio_file[fileno]); | |
757 | ||
758 | rw = context->std_input == EXEC_INPUT_FILE && | |
759 | streq_ptr(context->stdio_file[fileno], context->stdio_file[STDIN_FILENO]); | |
760 | ||
761 | if (rw) | |
7c248223 | 762 | return RET_NERRNO(dup2(STDIN_FILENO, fileno)); |
2038c3f5 | 763 | |
566b7d23 ZD |
764 | flags = O_WRONLY; |
765 | if (o == EXEC_OUTPUT_FILE_APPEND) | |
766 | flags |= O_APPEND; | |
8d7dab1f LW |
767 | else if (o == EXEC_OUTPUT_FILE_TRUNCATE) |
768 | flags |= O_TRUNC; | |
566b7d23 ZD |
769 | |
770 | fd = acquire_path(context->stdio_file[fileno], flags, 0666 & ~context->umask); | |
2038c3f5 LP |
771 | if (fd < 0) |
772 | return fd; | |
773 | ||
566b7d23 | 774 | return move_fd(fd, fileno, 0); |
2038c3f5 LP |
775 | } |
776 | ||
94f04347 | 777 | default: |
04499a70 | 778 | assert_not_reached(); |
94f04347 | 779 | } |
071830ff LP |
780 | } |
781 | ||
02a51aba | 782 | static int chown_terminal(int fd, uid_t uid) { |
4b3b5bc7 | 783 | int r; |
02a51aba LP |
784 | |
785 | assert(fd >= 0); | |
02a51aba | 786 | |
1ff74fb6 | 787 | /* Before we chown/chmod the TTY, let's ensure this is actually a tty */ |
4b3b5bc7 LP |
788 | if (isatty(fd) < 1) { |
789 | if (IN_SET(errno, EINVAL, ENOTTY)) | |
790 | return 0; /* not a tty */ | |
1ff74fb6 | 791 | |
02a51aba | 792 | return -errno; |
4b3b5bc7 | 793 | } |
02a51aba | 794 | |
4b3b5bc7 | 795 | /* This might fail. What matters are the results. */ |
f2df231f | 796 | r = fchmod_and_chown(fd, TTY_MODE, uid, GID_INVALID); |
4b3b5bc7 LP |
797 | if (r < 0) |
798 | return r; | |
02a51aba | 799 | |
4b3b5bc7 | 800 | return 1; |
02a51aba LP |
801 | } |
802 | ||
aedec452 | 803 | static int setup_confirm_stdio( |
51462135 | 804 | const ExecContext *context, |
aedec452 LP |
805 | const char *vc, |
806 | int *ret_saved_stdin, | |
807 | int *ret_saved_stdout) { | |
808 | ||
254d1313 | 809 | _cleanup_close_ int fd = -EBADF, saved_stdin = -EBADF, saved_stdout = -EBADF; |
4d62ee55 | 810 | unsigned rows, cols; |
3d18b167 | 811 | int r; |
80876c20 | 812 | |
aedec452 LP |
813 | assert(ret_saved_stdin); |
814 | assert(ret_saved_stdout); | |
80876c20 | 815 | |
af6da548 LP |
816 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
817 | if (saved_stdin < 0) | |
818 | return -errno; | |
80876c20 | 819 | |
af6da548 | 820 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
3d18b167 LP |
821 | if (saved_stdout < 0) |
822 | return -errno; | |
80876c20 | 823 | |
8854d795 | 824 | fd = acquire_terminal(vc, ACQUIRE_TERMINAL_WAIT, DEFAULT_CONFIRM_USEC); |
3d18b167 LP |
825 | if (fd < 0) |
826 | return fd; | |
80876c20 | 827 | |
af6da548 LP |
828 | r = chown_terminal(fd, getuid()); |
829 | if (r < 0) | |
3d18b167 | 830 | return r; |
02a51aba | 831 | |
3d18b167 LP |
832 | r = reset_terminal_fd(fd, true); |
833 | if (r < 0) | |
834 | return r; | |
80876c20 | 835 | |
4d62ee55 DDM |
836 | r = exec_context_tty_size(context, &rows, &cols); |
837 | if (r < 0) | |
838 | return r; | |
839 | ||
840 | r = terminal_set_size_fd(fd, vc, rows, cols); | |
51462135 DDM |
841 | if (r < 0) |
842 | return r; | |
843 | ||
aedec452 LP |
844 | r = rearrange_stdio(fd, fd, STDERR_FILENO); /* Invalidates 'fd' also on failure */ |
845 | TAKE_FD(fd); | |
2b33ab09 LP |
846 | if (r < 0) |
847 | return r; | |
80876c20 | 848 | |
aedec452 LP |
849 | *ret_saved_stdin = TAKE_FD(saved_stdin); |
850 | *ret_saved_stdout = TAKE_FD(saved_stdout); | |
3d18b167 | 851 | return 0; |
80876c20 LP |
852 | } |
853 | ||
63d77c92 | 854 | static void write_confirm_error_fd(int err, int fd, const Unit *u) { |
3b20f877 FB |
855 | assert(err < 0); |
856 | ||
857 | if (err == -ETIMEDOUT) | |
63d77c92 | 858 | dprintf(fd, "Confirmation question timed out for %s, assuming positive response.\n", u->id); |
3b20f877 FB |
859 | else { |
860 | errno = -err; | |
63d77c92 | 861 | dprintf(fd, "Couldn't ask confirmation for %s: %m, assuming positive response.\n", u->id); |
3b20f877 FB |
862 | } |
863 | } | |
864 | ||
63d77c92 | 865 | static void write_confirm_error(int err, const char *vc, const Unit *u) { |
254d1313 | 866 | _cleanup_close_ int fd = -EBADF; |
80876c20 | 867 | |
3b20f877 | 868 | assert(vc); |
80876c20 | 869 | |
7d5ceb64 | 870 | fd = open_terminal(vc, O_WRONLY|O_NOCTTY|O_CLOEXEC); |
af6da548 | 871 | if (fd < 0) |
3b20f877 | 872 | return; |
80876c20 | 873 | |
63d77c92 | 874 | write_confirm_error_fd(err, fd, u); |
af6da548 | 875 | } |
80876c20 | 876 | |
3d18b167 | 877 | static int restore_confirm_stdio(int *saved_stdin, int *saved_stdout) { |
af6da548 | 878 | int r = 0; |
80876c20 | 879 | |
af6da548 LP |
880 | assert(saved_stdin); |
881 | assert(saved_stdout); | |
882 | ||
883 | release_terminal(); | |
884 | ||
885 | if (*saved_stdin >= 0) | |
80876c20 | 886 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 887 | r = -errno; |
80876c20 | 888 | |
af6da548 | 889 | if (*saved_stdout >= 0) |
80876c20 | 890 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 891 | r = -errno; |
80876c20 | 892 | |
3d18b167 LP |
893 | *saved_stdin = safe_close(*saved_stdin); |
894 | *saved_stdout = safe_close(*saved_stdout); | |
af6da548 LP |
895 | |
896 | return r; | |
897 | } | |
898 | ||
3b20f877 FB |
899 | enum { |
900 | CONFIRM_PRETEND_FAILURE = -1, | |
901 | CONFIRM_PRETEND_SUCCESS = 0, | |
902 | CONFIRM_EXECUTE = 1, | |
903 | }; | |
904 | ||
51462135 | 905 | static int ask_for_confirmation(const ExecContext *context, const char *vc, Unit *u, const char *cmdline) { |
af6da548 | 906 | int saved_stdout = -1, saved_stdin = -1, r; |
2bcd3c26 | 907 | _cleanup_free_ char *e = NULL; |
3b20f877 | 908 | char c; |
af6da548 | 909 | |
3b20f877 | 910 | /* For any internal errors, assume a positive response. */ |
51462135 | 911 | r = setup_confirm_stdio(context, vc, &saved_stdin, &saved_stdout); |
3b20f877 | 912 | if (r < 0) { |
63d77c92 | 913 | write_confirm_error(r, vc, u); |
3b20f877 FB |
914 | return CONFIRM_EXECUTE; |
915 | } | |
af6da548 | 916 | |
b0eb2944 FB |
917 | /* confirm_spawn might have been disabled while we were sleeping. */ |
918 | if (manager_is_confirm_spawn_disabled(u->manager)) { | |
919 | r = 1; | |
920 | goto restore_stdio; | |
921 | } | |
af6da548 | 922 | |
2bcd3c26 FB |
923 | e = ellipsize(cmdline, 60, 100); |
924 | if (!e) { | |
925 | log_oom(); | |
926 | r = CONFIRM_EXECUTE; | |
927 | goto restore_stdio; | |
928 | } | |
af6da548 | 929 | |
d172b175 | 930 | for (;;) { |
539622bd | 931 | r = ask_char(&c, "yfshiDjcn", "Execute %s? [y, f, s – h for help] ", e); |
d172b175 | 932 | if (r < 0) { |
63d77c92 | 933 | write_confirm_error_fd(r, STDOUT_FILENO, u); |
d172b175 FB |
934 | r = CONFIRM_EXECUTE; |
935 | goto restore_stdio; | |
936 | } | |
af6da548 | 937 | |
d172b175 | 938 | switch (c) { |
b0eb2944 FB |
939 | case 'c': |
940 | printf("Resuming normal execution.\n"); | |
941 | manager_disable_confirm_spawn(); | |
942 | r = 1; | |
943 | break; | |
dd6f9ac0 FB |
944 | case 'D': |
945 | unit_dump(u, stdout, " "); | |
946 | continue; /* ask again */ | |
d172b175 FB |
947 | case 'f': |
948 | printf("Failing execution.\n"); | |
949 | r = CONFIRM_PRETEND_FAILURE; | |
950 | break; | |
951 | case 'h': | |
b0eb2944 FB |
952 | printf(" c - continue, proceed without asking anymore\n" |
953 | " D - dump, show the state of the unit\n" | |
dd6f9ac0 | 954 | " f - fail, don't execute the command and pretend it failed\n" |
d172b175 | 955 | " h - help\n" |
eedf223a | 956 | " i - info, show a short summary of the unit\n" |
56fde33a | 957 | " j - jobs, show jobs that are in progress\n" |
d172b175 FB |
958 | " s - skip, don't execute the command and pretend it succeeded\n" |
959 | " y - yes, execute the command\n"); | |
dd6f9ac0 | 960 | continue; /* ask again */ |
eedf223a FB |
961 | case 'i': |
962 | printf(" Description: %s\n" | |
963 | " Unit: %s\n" | |
964 | " Command: %s\n", | |
965 | u->id, u->description, cmdline); | |
966 | continue; /* ask again */ | |
56fde33a | 967 | case 'j': |
d1d8786c | 968 | manager_dump_jobs(u->manager, stdout, /* patterns= */ NULL, " "); |
56fde33a | 969 | continue; /* ask again */ |
539622bd FB |
970 | case 'n': |
971 | /* 'n' was removed in favor of 'f'. */ | |
972 | printf("Didn't understand 'n', did you mean 'f'?\n"); | |
973 | continue; /* ask again */ | |
d172b175 FB |
974 | case 's': |
975 | printf("Skipping execution.\n"); | |
976 | r = CONFIRM_PRETEND_SUCCESS; | |
977 | break; | |
978 | case 'y': | |
979 | r = CONFIRM_EXECUTE; | |
980 | break; | |
981 | default: | |
04499a70 | 982 | assert_not_reached(); |
d172b175 | 983 | } |
3b20f877 | 984 | break; |
3b20f877 | 985 | } |
af6da548 | 986 | |
3b20f877 | 987 | restore_stdio: |
af6da548 | 988 | restore_confirm_stdio(&saved_stdin, &saved_stdout); |
af6da548 | 989 | return r; |
80876c20 LP |
990 | } |
991 | ||
4d885bd3 DH |
992 | static int get_fixed_user(const ExecContext *c, const char **user, |
993 | uid_t *uid, gid_t *gid, | |
994 | const char **home, const char **shell) { | |
81a2b7ce | 995 | int r; |
4d885bd3 | 996 | const char *name; |
81a2b7ce | 997 | |
4d885bd3 | 998 | assert(c); |
81a2b7ce | 999 | |
23deef88 LP |
1000 | if (!c->user) |
1001 | return 0; | |
1002 | ||
4d885bd3 DH |
1003 | /* Note that we don't set $HOME or $SHELL if they are not particularly enlightening anyway |
1004 | * (i.e. are "/" or "/bin/nologin"). */ | |
81a2b7ce | 1005 | |
23deef88 | 1006 | name = c->user; |
fafff8f1 | 1007 | r = get_user_creds(&name, uid, gid, home, shell, USER_CREDS_CLEAN); |
4d885bd3 DH |
1008 | if (r < 0) |
1009 | return r; | |
81a2b7ce | 1010 | |
4d885bd3 DH |
1011 | *user = name; |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | static int get_fixed_group(const ExecContext *c, const char **group, gid_t *gid) { | |
1016 | int r; | |
1017 | const char *name; | |
1018 | ||
1019 | assert(c); | |
1020 | ||
1021 | if (!c->group) | |
1022 | return 0; | |
1023 | ||
1024 | name = c->group; | |
fafff8f1 | 1025 | r = get_group_creds(&name, gid, 0); |
4d885bd3 DH |
1026 | if (r < 0) |
1027 | return r; | |
1028 | ||
1029 | *group = name; | |
1030 | return 0; | |
1031 | } | |
1032 | ||
cdc5d5c5 DH |
1033 | static int get_supplementary_groups(const ExecContext *c, const char *user, |
1034 | const char *group, gid_t gid, | |
1035 | gid_t **supplementary_gids, int *ngids) { | |
4d885bd3 DH |
1036 | int r, k = 0; |
1037 | int ngroups_max; | |
1038 | bool keep_groups = false; | |
1039 | gid_t *groups = NULL; | |
1040 | _cleanup_free_ gid_t *l_gids = NULL; | |
1041 | ||
1042 | assert(c); | |
1043 | ||
bbeea271 DH |
1044 | /* |
1045 | * If user is given, then lookup GID and supplementary groups list. | |
1046 | * We avoid NSS lookups for gid=0. Also we have to initialize groups | |
cdc5d5c5 DH |
1047 | * here and as early as possible so we keep the list of supplementary |
1048 | * groups of the caller. | |
bbeea271 DH |
1049 | */ |
1050 | if (user && gid_is_valid(gid) && gid != 0) { | |
1051 | /* First step, initialize groups from /etc/groups */ | |
1052 | if (initgroups(user, gid) < 0) | |
1053 | return -errno; | |
1054 | ||
1055 | keep_groups = true; | |
1056 | } | |
1057 | ||
ac6e8be6 | 1058 | if (strv_isempty(c->supplementary_groups)) |
4d885bd3 DH |
1059 | return 0; |
1060 | ||
366ddd25 DH |
1061 | /* |
1062 | * If SupplementaryGroups= was passed then NGROUPS_MAX has to | |
1063 | * be positive, otherwise fail. | |
1064 | */ | |
1065 | errno = 0; | |
1066 | ngroups_max = (int) sysconf(_SC_NGROUPS_MAX); | |
66855de7 LP |
1067 | if (ngroups_max <= 0) |
1068 | return errno_or_else(EOPNOTSUPP); | |
366ddd25 | 1069 | |
4d885bd3 DH |
1070 | l_gids = new(gid_t, ngroups_max); |
1071 | if (!l_gids) | |
1072 | return -ENOMEM; | |
81a2b7ce | 1073 | |
4d885bd3 DH |
1074 | if (keep_groups) { |
1075 | /* | |
1076 | * Lookup the list of groups that the user belongs to, we | |
1077 | * avoid NSS lookups here too for gid=0. | |
1078 | */ | |
1079 | k = ngroups_max; | |
1080 | if (getgrouplist(user, gid, l_gids, &k) < 0) | |
1081 | return -EINVAL; | |
1082 | } else | |
1083 | k = 0; | |
81a2b7ce | 1084 | |
4d885bd3 DH |
1085 | STRV_FOREACH(i, c->supplementary_groups) { |
1086 | const char *g; | |
81a2b7ce | 1087 | |
4d885bd3 DH |
1088 | if (k >= ngroups_max) |
1089 | return -E2BIG; | |
81a2b7ce | 1090 | |
4d885bd3 | 1091 | g = *i; |
fafff8f1 | 1092 | r = get_group_creds(&g, l_gids+k, 0); |
4d885bd3 DH |
1093 | if (r < 0) |
1094 | return r; | |
81a2b7ce | 1095 | |
4d885bd3 DH |
1096 | k++; |
1097 | } | |
81a2b7ce | 1098 | |
4d885bd3 DH |
1099 | /* |
1100 | * Sets ngids to zero to drop all supplementary groups, happens | |
1101 | * when we are under root and SupplementaryGroups= is empty. | |
1102 | */ | |
1103 | if (k == 0) { | |
1104 | *ngids = 0; | |
1105 | return 0; | |
1106 | } | |
81a2b7ce | 1107 | |
4d885bd3 DH |
1108 | /* Otherwise get the final list of supplementary groups */ |
1109 | groups = memdup(l_gids, sizeof(gid_t) * k); | |
1110 | if (!groups) | |
1111 | return -ENOMEM; | |
1112 | ||
1113 | *supplementary_gids = groups; | |
1114 | *ngids = k; | |
1115 | ||
1116 | groups = NULL; | |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
34cf6c43 | 1121 | static int enforce_groups(gid_t gid, const gid_t *supplementary_gids, int ngids) { |
4d885bd3 DH |
1122 | int r; |
1123 | ||
709dbeac YW |
1124 | /* Handle SupplementaryGroups= if it is not empty */ |
1125 | if (ngids > 0) { | |
4d885bd3 DH |
1126 | r = maybe_setgroups(ngids, supplementary_gids); |
1127 | if (r < 0) | |
97f0e76f | 1128 | return r; |
4d885bd3 | 1129 | } |
81a2b7ce | 1130 | |
4d885bd3 DH |
1131 | if (gid_is_valid(gid)) { |
1132 | /* Then set our gids */ | |
1133 | if (setresgid(gid, gid, gid) < 0) | |
1134 | return -errno; | |
81a2b7ce LP |
1135 | } |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
a954b249 LP |
1140 | static int set_securebits(unsigned bits, unsigned mask) { |
1141 | unsigned applied; | |
1142 | int current; | |
1143 | ||
dbdc4098 TK |
1144 | current = prctl(PR_GET_SECUREBITS); |
1145 | if (current < 0) | |
1146 | return -errno; | |
a954b249 | 1147 | |
dbdc4098 | 1148 | /* Clear all securebits defined in mask and set bits */ |
a954b249 LP |
1149 | applied = ((unsigned) current & ~mask) | bits; |
1150 | if ((unsigned) current == applied) | |
dbdc4098 | 1151 | return 0; |
a954b249 | 1152 | |
dbdc4098 TK |
1153 | if (prctl(PR_SET_SECUREBITS, applied) < 0) |
1154 | return -errno; | |
a954b249 | 1155 | |
dbdc4098 TK |
1156 | return 1; |
1157 | } | |
1158 | ||
638fd8cc LP |
1159 | static int enforce_user( |
1160 | const ExecContext *context, | |
1161 | uid_t uid, | |
1162 | uint64_t capability_ambient_set) { | |
81a2b7ce | 1163 | assert(context); |
dbdc4098 | 1164 | int r; |
81a2b7ce | 1165 | |
4d885bd3 DH |
1166 | if (!uid_is_valid(uid)) |
1167 | return 0; | |
1168 | ||
a954b249 LP |
1169 | /* Sets (but doesn't look up) the UIS and makes sure we keep the capabilities while doing so. For |
1170 | * setting secure bits the capability CAP_SETPCAP is required, so we also need keep-caps in this | |
1171 | * case. */ | |
81a2b7ce | 1172 | |
638fd8cc | 1173 | if ((capability_ambient_set != 0 || context->secure_bits != 0) && uid != 0) { |
81a2b7ce | 1174 | |
a954b249 LP |
1175 | /* First step: If we need to keep capabilities but drop privileges we need to make sure we |
1176 | * keep our caps, while we drop privileges. Add KEEP_CAPS to the securebits */ | |
1177 | r = set_securebits(1U << SECURE_KEEP_CAPS, 0); | |
1178 | if (r < 0) | |
1179 | return r; | |
81a2b7ce LP |
1180 | } |
1181 | ||
479050b3 | 1182 | /* Second step: actually set the uids */ |
81a2b7ce LP |
1183 | if (setresuid(uid, uid, uid) < 0) |
1184 | return -errno; | |
1185 | ||
a954b249 LP |
1186 | /* At this point we should have all necessary capabilities but are otherwise a normal user. However, |
1187 | * the caps might got corrupted due to the setresuid() so we need clean them up later. This is done | |
1188 | * outside of this call. */ | |
81a2b7ce LP |
1189 | return 0; |
1190 | } | |
1191 | ||
349cc4a5 | 1192 | #if HAVE_PAM |
5b6319dc LP |
1193 | |
1194 | static int null_conv( | |
1195 | int num_msg, | |
1196 | const struct pam_message **msg, | |
1197 | struct pam_response **resp, | |
1198 | void *appdata_ptr) { | |
1199 | ||
1200 | /* We don't support conversations */ | |
1201 | ||
1202 | return PAM_CONV_ERR; | |
1203 | } | |
1204 | ||
cefc33ae LP |
1205 | #endif |
1206 | ||
5b6319dc LP |
1207 | static int setup_pam( |
1208 | const char *name, | |
1209 | const char *user, | |
940c5210 | 1210 | uid_t uid, |
2d6fce8d | 1211 | gid_t gid, |
5b6319dc | 1212 | const char *tty, |
421bb42d | 1213 | char ***env, /* updated on success */ |
5b8d1f6b | 1214 | const int fds[], size_t n_fds) { |
5b6319dc | 1215 | |
349cc4a5 | 1216 | #if HAVE_PAM |
cefc33ae | 1217 | |
5b6319dc LP |
1218 | static const struct pam_conv conv = { |
1219 | .conv = null_conv, | |
1220 | .appdata_ptr = NULL | |
1221 | }; | |
1222 | ||
2d7c6aa2 | 1223 | _cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL; |
46e5bbab | 1224 | _cleanup_strv_free_ char **e = NULL; |
5b6319dc | 1225 | pam_handle_t *handle = NULL; |
d6e5f3ad | 1226 | sigset_t old_ss; |
7bb70b6e | 1227 | int pam_code = PAM_SUCCESS, r; |
5b6319dc LP |
1228 | bool close_session = false; |
1229 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 1230 | int flags = 0; |
5b6319dc LP |
1231 | |
1232 | assert(name); | |
1233 | assert(user); | |
2065ca69 | 1234 | assert(env); |
5b6319dc LP |
1235 | |
1236 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 1237 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
1238 | * systemd via the cgroup logic. It will then remove the PAM |
1239 | * session again. The parent process will exec() the actual | |
1240 | * daemon. We do things this way to ensure that the main PID | |
1241 | * of the daemon is the one we initially fork()ed. */ | |
1242 | ||
7bb70b6e LP |
1243 | r = barrier_create(&barrier); |
1244 | if (r < 0) | |
2d7c6aa2 DH |
1245 | goto fail; |
1246 | ||
553d2243 | 1247 | if (log_get_max_level() < LOG_DEBUG) |
970edce6 ZJS |
1248 | flags |= PAM_SILENT; |
1249 | ||
f546241b ZJS |
1250 | pam_code = pam_start(name, user, &conv, &handle); |
1251 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
1252 | handle = NULL; |
1253 | goto fail; | |
1254 | } | |
1255 | ||
3cd24c1a LP |
1256 | if (!tty) { |
1257 | _cleanup_free_ char *q = NULL; | |
1258 | ||
1259 | /* Hmm, so no TTY was explicitly passed, but an fd passed to us directly might be a TTY. Let's figure | |
1260 | * out if that's the case, and read the TTY off it. */ | |
1261 | ||
1262 | if (getttyname_malloc(STDIN_FILENO, &q) >= 0) | |
1263 | tty = strjoina("/dev/", q); | |
1264 | } | |
1265 | ||
513cf7da MS |
1266 | if (tty) { |
1267 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
1268 | if (pam_code != PAM_SUCCESS) | |
1269 | goto fail; | |
1270 | } | |
5b6319dc | 1271 | |
84eada2f JW |
1272 | STRV_FOREACH(nv, *env) { |
1273 | pam_code = pam_putenv(handle, *nv); | |
2065ca69 JW |
1274 | if (pam_code != PAM_SUCCESS) |
1275 | goto fail; | |
1276 | } | |
1277 | ||
970edce6 | 1278 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 1279 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
1280 | goto fail; |
1281 | ||
3bb39ea9 DG |
1282 | pam_code = pam_setcred(handle, PAM_ESTABLISH_CRED | flags); |
1283 | if (pam_code != PAM_SUCCESS) | |
46d7c6af | 1284 | log_debug("pam_setcred() failed, ignoring: %s", pam_strerror(handle, pam_code)); |
3bb39ea9 | 1285 | |
970edce6 | 1286 | pam_code = pam_open_session(handle, flags); |
f546241b | 1287 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
1288 | goto fail; |
1289 | ||
1290 | close_session = true; | |
1291 | ||
f546241b ZJS |
1292 | e = pam_getenvlist(handle); |
1293 | if (!e) { | |
5b6319dc LP |
1294 | pam_code = PAM_BUF_ERR; |
1295 | goto fail; | |
1296 | } | |
1297 | ||
cafc5ca1 | 1298 | /* Block SIGTERM, so that we know that it won't get lost in the child */ |
ce30c8dc | 1299 | |
72c0a2c2 | 1300 | assert_se(sigprocmask_many(SIG_BLOCK, &old_ss, SIGTERM, -1) >= 0); |
5b6319dc | 1301 | |
df0ff127 | 1302 | parent_pid = getpid_cached(); |
5b6319dc | 1303 | |
4c253ed1 LP |
1304 | r = safe_fork("(sd-pam)", 0, &pam_pid); |
1305 | if (r < 0) | |
5b6319dc | 1306 | goto fail; |
4c253ed1 | 1307 | if (r == 0) { |
7bb70b6e | 1308 | int sig, ret = EXIT_PAM; |
5b6319dc | 1309 | |
cafc5ca1 | 1310 | /* The child's job is to reset the PAM session on termination */ |
2d7c6aa2 | 1311 | barrier_set_role(&barrier, BARRIER_CHILD); |
5b6319dc | 1312 | |
1da37e58 ZJS |
1313 | /* Make sure we don't keep open the passed fds in this child. We assume that otherwise only |
1314 | * those fds are open here that have been opened by PAM. */ | |
4c253ed1 | 1315 | (void) close_many(fds, n_fds); |
5b6319dc | 1316 | |
cafc5ca1 LP |
1317 | /* Drop privileges - we don't need any to pam_close_session and this will make |
1318 | * PR_SET_PDEATHSIG work in most cases. If this fails, ignore the error - but expect sd-pam | |
1319 | * threads to fail to exit normally */ | |
2d6fce8d | 1320 | |
97f0e76f LP |
1321 | r = maybe_setgroups(0, NULL); |
1322 | if (r < 0) | |
1323 | log_warning_errno(r, "Failed to setgroups() in sd-pam: %m"); | |
2d6fce8d LP |
1324 | if (setresgid(gid, gid, gid) < 0) |
1325 | log_warning_errno(errno, "Failed to setresgid() in sd-pam: %m"); | |
940c5210 | 1326 | if (setresuid(uid, uid, uid) < 0) |
2d6fce8d | 1327 | log_warning_errno(errno, "Failed to setresuid() in sd-pam: %m"); |
940c5210 | 1328 | |
9c274488 | 1329 | (void) ignore_signals(SIGPIPE); |
ce30c8dc | 1330 | |
cafc5ca1 LP |
1331 | /* Wait until our parent died. This will only work if the above setresuid() succeeds, |
1332 | * otherwise the kernel will not allow unprivileged parents kill their privileged children | |
1333 | * this way. We rely on the control groups kill logic to do the rest for us. */ | |
5b6319dc LP |
1334 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) |
1335 | goto child_finish; | |
1336 | ||
cafc5ca1 LP |
1337 | /* Tell the parent that our setup is done. This is especially important regarding dropping |
1338 | * privileges. Otherwise, unit setup might race against our setresuid(2) call. | |
643f4706 | 1339 | * |
cafc5ca1 | 1340 | * If the parent aborted, we'll detect this below, hence ignore return failure here. */ |
643f4706 | 1341 | (void) barrier_place(&barrier); |
2d7c6aa2 | 1342 | |
643f4706 | 1343 | /* Check if our parent process might already have died? */ |
5b6319dc | 1344 | if (getppid() == parent_pid) { |
d6e5f3ad DM |
1345 | sigset_t ss; |
1346 | ||
1347 | assert_se(sigemptyset(&ss) >= 0); | |
1348 | assert_se(sigaddset(&ss, SIGTERM) >= 0); | |
1349 | ||
3dead8d9 LP |
1350 | for (;;) { |
1351 | if (sigwait(&ss, &sig) < 0) { | |
1352 | if (errno == EINTR) | |
1353 | continue; | |
1354 | ||
1355 | goto child_finish; | |
1356 | } | |
5b6319dc | 1357 | |
3dead8d9 LP |
1358 | assert(sig == SIGTERM); |
1359 | break; | |
1360 | } | |
5b6319dc LP |
1361 | } |
1362 | ||
3bb39ea9 DG |
1363 | pam_code = pam_setcred(handle, PAM_DELETE_CRED | flags); |
1364 | if (pam_code != PAM_SUCCESS) | |
1365 | goto child_finish; | |
1366 | ||
3dead8d9 | 1367 | /* If our parent died we'll end the session */ |
f546241b | 1368 | if (getppid() != parent_pid) { |
970edce6 | 1369 | pam_code = pam_close_session(handle, flags); |
f546241b | 1370 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 1371 | goto child_finish; |
f546241b | 1372 | } |
5b6319dc | 1373 | |
7bb70b6e | 1374 | ret = 0; |
5b6319dc LP |
1375 | |
1376 | child_finish: | |
7feb2b57 LP |
1377 | /* NB: pam_end() when called in child processes should set PAM_DATA_SILENT to let the module |
1378 | * know about this. See pam_end(3) */ | |
1379 | (void) pam_end(handle, pam_code | flags | PAM_DATA_SILENT); | |
7bb70b6e | 1380 | _exit(ret); |
5b6319dc LP |
1381 | } |
1382 | ||
2d7c6aa2 DH |
1383 | barrier_set_role(&barrier, BARRIER_PARENT); |
1384 | ||
cafc5ca1 LP |
1385 | /* If the child was forked off successfully it will do all the cleanups, so forget about the handle |
1386 | * here. */ | |
5b6319dc LP |
1387 | handle = NULL; |
1388 | ||
3b8bddde | 1389 | /* Unblock SIGTERM again in the parent */ |
72c0a2c2 | 1390 | assert_se(sigprocmask(SIG_SETMASK, &old_ss, NULL) >= 0); |
5b6319dc | 1391 | |
cafc5ca1 LP |
1392 | /* We close the log explicitly here, since the PAM modules might have opened it, but we don't want |
1393 | * this fd around. */ | |
5b6319dc LP |
1394 | closelog(); |
1395 | ||
cafc5ca1 LP |
1396 | /* Synchronously wait for the child to initialize. We don't care for errors as we cannot |
1397 | * recover. However, warn loudly if it happens. */ | |
2d7c6aa2 DH |
1398 | if (!barrier_place_and_sync(&barrier)) |
1399 | log_error("PAM initialization failed"); | |
1400 | ||
130d3d22 | 1401 | return strv_free_and_replace(*env, e); |
5b6319dc LP |
1402 | |
1403 | fail: | |
970edce6 ZJS |
1404 | if (pam_code != PAM_SUCCESS) { |
1405 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
7bb70b6e LP |
1406 | r = -EPERM; /* PAM errors do not map to errno */ |
1407 | } else | |
1408 | log_error_errno(r, "PAM failed: %m"); | |
9ba35398 | 1409 | |
5b6319dc LP |
1410 | if (handle) { |
1411 | if (close_session) | |
970edce6 | 1412 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 1413 | |
7feb2b57 | 1414 | (void) pam_end(handle, pam_code | flags); |
5b6319dc LP |
1415 | } |
1416 | ||
5b6319dc | 1417 | closelog(); |
7bb70b6e | 1418 | return r; |
cefc33ae LP |
1419 | #else |
1420 | return 0; | |
5b6319dc | 1421 | #endif |
cefc33ae | 1422 | } |
5b6319dc | 1423 | |
5d6b1584 | 1424 | static void rename_process_from_path(const char *path) { |
a99626c1 | 1425 | _cleanup_free_ char *buf = NULL; |
5d6b1584 | 1426 | const char *p; |
5d6b1584 | 1427 | |
a99626c1 LP |
1428 | assert(path); |
1429 | ||
1430 | /* This resulting string must fit in 10 chars (i.e. the length of "/sbin/init") to look pretty in | |
1431 | * /bin/ps */ | |
5d6b1584 | 1432 | |
a99626c1 | 1433 | if (path_extract_filename(path, &buf) < 0) { |
5d6b1584 LP |
1434 | rename_process("(...)"); |
1435 | return; | |
1436 | } | |
1437 | ||
a99626c1 | 1438 | size_t l = strlen(buf); |
5d6b1584 | 1439 | if (l > 8) { |
a99626c1 | 1440 | /* The end of the process name is usually more interesting, since the first bit might just be |
5d6b1584 | 1441 | * "systemd-" */ |
a99626c1 | 1442 | p = buf + l - 8; |
5d6b1584 | 1443 | l = 8; |
a99626c1 LP |
1444 | } else |
1445 | p = buf; | |
5d6b1584 | 1446 | |
a99626c1 | 1447 | char process_name[11]; |
5d6b1584 LP |
1448 | process_name[0] = '('; |
1449 | memcpy(process_name+1, p, l); | |
1450 | process_name[1+l] = ')'; | |
1451 | process_name[1+l+1] = 0; | |
1452 | ||
1453 | rename_process(process_name); | |
1454 | } | |
1455 | ||
469830d1 LP |
1456 | static bool context_has_address_families(const ExecContext *c) { |
1457 | assert(c); | |
1458 | ||
6b000af4 | 1459 | return c->address_families_allow_list || |
469830d1 LP |
1460 | !set_isempty(c->address_families); |
1461 | } | |
1462 | ||
1463 | static bool context_has_syscall_filters(const ExecContext *c) { | |
1464 | assert(c); | |
1465 | ||
6b000af4 | 1466 | return c->syscall_allow_list || |
8cfa775f | 1467 | !hashmap_isempty(c->syscall_filter); |
469830d1 LP |
1468 | } |
1469 | ||
9df2cdd8 TM |
1470 | static bool context_has_syscall_logs(const ExecContext *c) { |
1471 | assert(c); | |
1472 | ||
1473 | return c->syscall_log_allow_list || | |
1474 | !hashmap_isempty(c->syscall_log); | |
1475 | } | |
1476 | ||
469830d1 LP |
1477 | static bool context_has_no_new_privileges(const ExecContext *c) { |
1478 | assert(c); | |
1479 | ||
1480 | if (c->no_new_privileges) | |
1481 | return true; | |
1482 | ||
26c45a6c | 1483 | if (have_effective_cap(CAP_SYS_ADMIN) > 0) /* if we are privileged, we don't need NNP */ |
469830d1 LP |
1484 | return false; |
1485 | ||
1486 | /* We need NNP if we have any form of seccomp and are unprivileged */ | |
0538d2a8 | 1487 | return c->lock_personality || |
469830d1 | 1488 | c->memory_deny_write_execute || |
0538d2a8 | 1489 | c->private_devices || |
fc64760d | 1490 | c->protect_clock || |
0538d2a8 | 1491 | c->protect_hostname || |
469830d1 LP |
1492 | c->protect_kernel_tunables || |
1493 | c->protect_kernel_modules || | |
84703040 | 1494 | c->protect_kernel_logs || |
0538d2a8 YW |
1495 | context_has_address_families(c) || |
1496 | exec_context_restrict_namespaces_set(c) || | |
1497 | c->restrict_realtime || | |
1498 | c->restrict_suid_sgid || | |
78e864e5 | 1499 | !set_isempty(c->syscall_archs) || |
0538d2a8 YW |
1500 | context_has_syscall_filters(c) || |
1501 | context_has_syscall_logs(c); | |
469830d1 LP |
1502 | } |
1503 | ||
349cc4a5 | 1504 | #if HAVE_SECCOMP |
17df7223 | 1505 | |
83f12b27 | 1506 | static bool skip_seccomp_unavailable(const Unit* u, const char* msg) { |
f673b62d LP |
1507 | |
1508 | if (is_seccomp_available()) | |
1509 | return false; | |
1510 | ||
f673b62d | 1511 | log_unit_debug(u, "SECCOMP features not detected in the kernel, skipping %s", msg); |
f673b62d | 1512 | return true; |
83f12b27 FS |
1513 | } |
1514 | ||
165a31c0 | 1515 | static int apply_syscall_filter(const Unit* u, const ExecContext *c, bool needs_ambient_hack) { |
469830d1 | 1516 | uint32_t negative_action, default_action, action; |
165a31c0 | 1517 | int r; |
8351ceae | 1518 | |
469830d1 | 1519 | assert(u); |
c0467cf3 | 1520 | assert(c); |
8351ceae | 1521 | |
469830d1 | 1522 | if (!context_has_syscall_filters(c)) |
83f12b27 FS |
1523 | return 0; |
1524 | ||
469830d1 LP |
1525 | if (skip_seccomp_unavailable(u, "SystemCallFilter=")) |
1526 | return 0; | |
e9642be2 | 1527 | |
005bfaf1 | 1528 | negative_action = c->syscall_errno == SECCOMP_ERROR_NUMBER_KILL ? scmp_act_kill_process() : SCMP_ACT_ERRNO(c->syscall_errno); |
e9642be2 | 1529 | |
6b000af4 | 1530 | if (c->syscall_allow_list) { |
469830d1 LP |
1531 | default_action = negative_action; |
1532 | action = SCMP_ACT_ALLOW; | |
7c66bae2 | 1533 | } else { |
469830d1 LP |
1534 | default_action = SCMP_ACT_ALLOW; |
1535 | action = negative_action; | |
57183d11 | 1536 | } |
8351ceae | 1537 | |
165a31c0 | 1538 | if (needs_ambient_hack) { |
6b000af4 | 1539 | r = seccomp_filter_set_add(c->syscall_filter, c->syscall_allow_list, syscall_filter_sets + SYSCALL_FILTER_SET_SETUID); |
165a31c0 LP |
1540 | if (r < 0) |
1541 | return r; | |
1542 | } | |
1543 | ||
b54f36c6 | 1544 | return seccomp_load_syscall_filter_set_raw(default_action, c->syscall_filter, action, false); |
4298d0b5 LP |
1545 | } |
1546 | ||
9df2cdd8 TM |
1547 | static int apply_syscall_log(const Unit* u, const ExecContext *c) { |
1548 | #ifdef SCMP_ACT_LOG | |
1549 | uint32_t default_action, action; | |
1550 | #endif | |
1551 | ||
1552 | assert(u); | |
1553 | assert(c); | |
1554 | ||
1555 | if (!context_has_syscall_logs(c)) | |
1556 | return 0; | |
1557 | ||
1558 | #ifdef SCMP_ACT_LOG | |
1559 | if (skip_seccomp_unavailable(u, "SystemCallLog=")) | |
1560 | return 0; | |
1561 | ||
1562 | if (c->syscall_log_allow_list) { | |
1563 | /* Log nothing but the ones listed */ | |
1564 | default_action = SCMP_ACT_ALLOW; | |
1565 | action = SCMP_ACT_LOG; | |
1566 | } else { | |
1567 | /* Log everything but the ones listed */ | |
1568 | default_action = SCMP_ACT_LOG; | |
1569 | action = SCMP_ACT_ALLOW; | |
1570 | } | |
1571 | ||
1572 | return seccomp_load_syscall_filter_set_raw(default_action, c->syscall_log, action, false); | |
1573 | #else | |
1574 | /* old libseccomp */ | |
1575 | log_unit_debug(u, "SECCOMP feature SCMP_ACT_LOG not available, skipping SystemCallLog="); | |
1576 | return 0; | |
1577 | #endif | |
1578 | } | |
1579 | ||
469830d1 LP |
1580 | static int apply_syscall_archs(const Unit *u, const ExecContext *c) { |
1581 | assert(u); | |
4298d0b5 LP |
1582 | assert(c); |
1583 | ||
469830d1 | 1584 | if (set_isempty(c->syscall_archs)) |
83f12b27 FS |
1585 | return 0; |
1586 | ||
469830d1 LP |
1587 | if (skip_seccomp_unavailable(u, "SystemCallArchitectures=")) |
1588 | return 0; | |
4298d0b5 | 1589 | |
469830d1 LP |
1590 | return seccomp_restrict_archs(c->syscall_archs); |
1591 | } | |
4298d0b5 | 1592 | |
469830d1 LP |
1593 | static int apply_address_families(const Unit* u, const ExecContext *c) { |
1594 | assert(u); | |
1595 | assert(c); | |
4298d0b5 | 1596 | |
469830d1 LP |
1597 | if (!context_has_address_families(c)) |
1598 | return 0; | |
4298d0b5 | 1599 | |
469830d1 LP |
1600 | if (skip_seccomp_unavailable(u, "RestrictAddressFamilies=")) |
1601 | return 0; | |
4298d0b5 | 1602 | |
6b000af4 | 1603 | return seccomp_restrict_address_families(c->address_families, c->address_families_allow_list); |
8351ceae | 1604 | } |
4298d0b5 | 1605 | |
83f12b27 | 1606 | static int apply_memory_deny_write_execute(const Unit* u, const ExecContext *c) { |
7a114ed4 TM |
1607 | int r; |
1608 | ||
469830d1 | 1609 | assert(u); |
f3e43635 TM |
1610 | assert(c); |
1611 | ||
469830d1 | 1612 | if (!c->memory_deny_write_execute) |
83f12b27 FS |
1613 | return 0; |
1614 | ||
7a114ed4 TM |
1615 | /* use prctl() if kernel supports it (6.3) */ |
1616 | r = prctl(PR_SET_MDWE, PR_MDWE_REFUSE_EXEC_GAIN, 0, 0, 0); | |
1617 | if (r == 0) { | |
1618 | log_unit_debug(u, "Enabled MemoryDenyWriteExecute= with PR_SET_MDWE"); | |
1619 | return 0; | |
1620 | } | |
1621 | if (r < 0 && errno != EINVAL) | |
1622 | return log_unit_debug_errno(u, errno, "Failed to enable MemoryDenyWriteExecute= with PR_SET_MDWE: %m"); | |
1623 | /* else use seccomp */ | |
1624 | log_unit_debug(u, "Kernel doesn't support PR_SET_MDWE: falling back to seccomp"); | |
1625 | ||
469830d1 LP |
1626 | if (skip_seccomp_unavailable(u, "MemoryDenyWriteExecute=")) |
1627 | return 0; | |
f3e43635 | 1628 | |
469830d1 | 1629 | return seccomp_memory_deny_write_execute(); |
f3e43635 TM |
1630 | } |
1631 | ||
83f12b27 | 1632 | static int apply_restrict_realtime(const Unit* u, const ExecContext *c) { |
469830d1 | 1633 | assert(u); |
f4170c67 LP |
1634 | assert(c); |
1635 | ||
469830d1 | 1636 | if (!c->restrict_realtime) |
83f12b27 FS |
1637 | return 0; |
1638 | ||
469830d1 LP |
1639 | if (skip_seccomp_unavailable(u, "RestrictRealtime=")) |
1640 | return 0; | |
f4170c67 | 1641 | |
469830d1 | 1642 | return seccomp_restrict_realtime(); |
f4170c67 LP |
1643 | } |
1644 | ||
f69567cb LP |
1645 | static int apply_restrict_suid_sgid(const Unit* u, const ExecContext *c) { |
1646 | assert(u); | |
1647 | assert(c); | |
1648 | ||
1649 | if (!c->restrict_suid_sgid) | |
1650 | return 0; | |
1651 | ||
1652 | if (skip_seccomp_unavailable(u, "RestrictSUIDSGID=")) | |
1653 | return 0; | |
1654 | ||
1655 | return seccomp_restrict_suid_sgid(); | |
1656 | } | |
1657 | ||
59e856c7 | 1658 | static int apply_protect_sysctl(const Unit *u, const ExecContext *c) { |
469830d1 | 1659 | assert(u); |
59eeb84b LP |
1660 | assert(c); |
1661 | ||
1662 | /* Turn off the legacy sysctl() system call. Many distributions turn this off while building the kernel, but | |
1663 | * let's protect even those systems where this is left on in the kernel. */ | |
1664 | ||
469830d1 | 1665 | if (!c->protect_kernel_tunables) |
59eeb84b LP |
1666 | return 0; |
1667 | ||
469830d1 LP |
1668 | if (skip_seccomp_unavailable(u, "ProtectKernelTunables=")) |
1669 | return 0; | |
59eeb84b | 1670 | |
469830d1 | 1671 | return seccomp_protect_sysctl(); |
59eeb84b LP |
1672 | } |
1673 | ||
59e856c7 | 1674 | static int apply_protect_kernel_modules(const Unit *u, const ExecContext *c) { |
469830d1 | 1675 | assert(u); |
502d704e DH |
1676 | assert(c); |
1677 | ||
25a8d8a0 | 1678 | /* Turn off module syscalls on ProtectKernelModules=yes */ |
502d704e | 1679 | |
469830d1 LP |
1680 | if (!c->protect_kernel_modules) |
1681 | return 0; | |
1682 | ||
502d704e DH |
1683 | if (skip_seccomp_unavailable(u, "ProtectKernelModules=")) |
1684 | return 0; | |
1685 | ||
b54f36c6 | 1686 | return seccomp_load_syscall_filter_set(SCMP_ACT_ALLOW, syscall_filter_sets + SYSCALL_FILTER_SET_MODULE, SCMP_ACT_ERRNO(EPERM), false); |
502d704e DH |
1687 | } |
1688 | ||
84703040 KK |
1689 | static int apply_protect_kernel_logs(const Unit *u, const ExecContext *c) { |
1690 | assert(u); | |
1691 | assert(c); | |
1692 | ||
1693 | if (!c->protect_kernel_logs) | |
1694 | return 0; | |
1695 | ||
1696 | if (skip_seccomp_unavailable(u, "ProtectKernelLogs=")) | |
1697 | return 0; | |
1698 | ||
1699 | return seccomp_protect_syslog(); | |
1700 | } | |
1701 | ||
daf8f72b | 1702 | static int apply_protect_clock(const Unit *u, const ExecContext *c) { |
fc64760d KK |
1703 | assert(u); |
1704 | assert(c); | |
1705 | ||
1706 | if (!c->protect_clock) | |
1707 | return 0; | |
1708 | ||
1709 | if (skip_seccomp_unavailable(u, "ProtectClock=")) | |
1710 | return 0; | |
1711 | ||
1712 | return seccomp_load_syscall_filter_set(SCMP_ACT_ALLOW, syscall_filter_sets + SYSCALL_FILTER_SET_CLOCK, SCMP_ACT_ERRNO(EPERM), false); | |
1713 | } | |
1714 | ||
59e856c7 | 1715 | static int apply_private_devices(const Unit *u, const ExecContext *c) { |
469830d1 | 1716 | assert(u); |
ba128bb8 LP |
1717 | assert(c); |
1718 | ||
8f81a5f6 | 1719 | /* If PrivateDevices= is set, also turn off iopl and all @raw-io syscalls. */ |
ba128bb8 | 1720 | |
469830d1 LP |
1721 | if (!c->private_devices) |
1722 | return 0; | |
1723 | ||
ba128bb8 LP |
1724 | if (skip_seccomp_unavailable(u, "PrivateDevices=")) |
1725 | return 0; | |
1726 | ||
b54f36c6 | 1727 | return seccomp_load_syscall_filter_set(SCMP_ACT_ALLOW, syscall_filter_sets + SYSCALL_FILTER_SET_RAW_IO, SCMP_ACT_ERRNO(EPERM), false); |
ba128bb8 LP |
1728 | } |
1729 | ||
34cf6c43 | 1730 | static int apply_restrict_namespaces(const Unit *u, const ExecContext *c) { |
469830d1 | 1731 | assert(u); |
add00535 LP |
1732 | assert(c); |
1733 | ||
1734 | if (!exec_context_restrict_namespaces_set(c)) | |
1735 | return 0; | |
1736 | ||
1737 | if (skip_seccomp_unavailable(u, "RestrictNamespaces=")) | |
1738 | return 0; | |
1739 | ||
1740 | return seccomp_restrict_namespaces(c->restrict_namespaces); | |
1741 | } | |
1742 | ||
78e864e5 | 1743 | static int apply_lock_personality(const Unit* u, const ExecContext *c) { |
e8132d63 LP |
1744 | unsigned long personality; |
1745 | int r; | |
78e864e5 TM |
1746 | |
1747 | assert(u); | |
1748 | assert(c); | |
1749 | ||
1750 | if (!c->lock_personality) | |
1751 | return 0; | |
1752 | ||
1753 | if (skip_seccomp_unavailable(u, "LockPersonality=")) | |
1754 | return 0; | |
1755 | ||
e8132d63 LP |
1756 | personality = c->personality; |
1757 | ||
1758 | /* If personality is not specified, use either PER_LINUX or PER_LINUX32 depending on what is currently set. */ | |
1759 | if (personality == PERSONALITY_INVALID) { | |
1760 | ||
1761 | r = opinionated_personality(&personality); | |
1762 | if (r < 0) | |
1763 | return r; | |
1764 | } | |
78e864e5 TM |
1765 | |
1766 | return seccomp_lock_personality(personality); | |
1767 | } | |
1768 | ||
c0467cf3 | 1769 | #endif |
8351ceae | 1770 | |
7a8288f6 | 1771 | #if HAVE_LIBBPF |
7a8288f6 DM |
1772 | static int apply_restrict_filesystems(Unit *u, const ExecContext *c) { |
1773 | assert(u); | |
1774 | assert(c); | |
1775 | ||
1776 | if (!exec_context_restrict_filesystems_set(c)) | |
1777 | return 0; | |
1778 | ||
46004616 ZJS |
1779 | if (!u->manager->restrict_fs) { |
1780 | /* LSM BPF is unsupported or lsm_bpf_setup failed */ | |
1781 | log_unit_debug(u, "LSM BPF not supported, skipping RestrictFileSystems="); | |
7a8288f6 | 1782 | return 0; |
46004616 | 1783 | } |
7a8288f6 DM |
1784 | |
1785 | return lsm_bpf_unit_restrict_filesystems(u, c->restrict_filesystems, c->restrict_filesystems_allow_list); | |
1786 | } | |
1787 | #endif | |
1788 | ||
daf8f72b | 1789 | static int apply_protect_hostname(const Unit *u, const ExecContext *c, int *ret_exit_status) { |
daf8f72b LP |
1790 | assert(u); |
1791 | assert(c); | |
1792 | ||
1793 | if (!c->protect_hostname) | |
1794 | return 0; | |
1795 | ||
1796 | if (ns_type_supported(NAMESPACE_UTS)) { | |
1797 | if (unshare(CLONE_NEWUTS) < 0) { | |
1798 | if (!ERRNO_IS_NOT_SUPPORTED(errno) && !ERRNO_IS_PRIVILEGE(errno)) { | |
1799 | *ret_exit_status = EXIT_NAMESPACE; | |
1800 | return log_unit_error_errno(u, errno, "Failed to set up UTS namespacing: %m"); | |
1801 | } | |
1802 | ||
1803 | log_unit_warning(u, "ProtectHostname=yes is configured, but UTS namespace setup is prohibited (container manager?), ignoring namespace setup."); | |
1804 | } | |
1805 | } else | |
1806 | log_unit_warning(u, "ProtectHostname=yes is configured, but the kernel does not support UTS namespaces, ignoring namespace setup."); | |
1807 | ||
1808 | #if HAVE_SECCOMP | |
8f3e342f ZJS |
1809 | int r; |
1810 | ||
daf8f72b LP |
1811 | if (skip_seccomp_unavailable(u, "ProtectHostname=")) |
1812 | return 0; | |
1813 | ||
1814 | r = seccomp_protect_hostname(); | |
1815 | if (r < 0) { | |
1816 | *ret_exit_status = EXIT_SECCOMP; | |
1817 | return log_unit_error_errno(u, r, "Failed to apply hostname restrictions: %m"); | |
1818 | } | |
1819 | #endif | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
3042bbeb | 1824 | static void do_idle_pipe_dance(int idle_pipe[static 4]) { |
31a7eb86 ZJS |
1825 | assert(idle_pipe); |
1826 | ||
54eb2300 LP |
1827 | idle_pipe[1] = safe_close(idle_pipe[1]); |
1828 | idle_pipe[2] = safe_close(idle_pipe[2]); | |
31a7eb86 ZJS |
1829 | |
1830 | if (idle_pipe[0] >= 0) { | |
1831 | int r; | |
1832 | ||
1833 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1834 | ||
1835 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
c7cc737f LP |
1836 | ssize_t n; |
1837 | ||
31a7eb86 | 1838 | /* Signal systemd that we are bored and want to continue. */ |
c7cc737f LP |
1839 | n = write(idle_pipe[3], "x", 1); |
1840 | if (n > 0) | |
cd972d69 | 1841 | /* Wait for systemd to react to the signal above. */ |
54756dce | 1842 | (void) fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); |
31a7eb86 ZJS |
1843 | } |
1844 | ||
54eb2300 | 1845 | idle_pipe[0] = safe_close(idle_pipe[0]); |
31a7eb86 ZJS |
1846 | |
1847 | } | |
1848 | ||
54eb2300 | 1849 | idle_pipe[3] = safe_close(idle_pipe[3]); |
31a7eb86 ZJS |
1850 | } |
1851 | ||
fb2042dd YW |
1852 | static const char *exec_directory_env_name_to_string(ExecDirectoryType t); |
1853 | ||
7cae38c4 | 1854 | static int build_environment( |
34cf6c43 | 1855 | const Unit *u, |
9fa95f85 | 1856 | const ExecContext *c, |
1e22b5cd | 1857 | const ExecParameters *p, |
6bb00842 | 1858 | const CGroupContext *cgroup_context, |
da6053d0 | 1859 | size_t n_fds, |
cd48e23f | 1860 | char **fdnames, |
7cae38c4 LP |
1861 | const char *home, |
1862 | const char *username, | |
1863 | const char *shell, | |
7bce046b LP |
1864 | dev_t journal_stream_dev, |
1865 | ino_t journal_stream_ino, | |
6bb00842 | 1866 | const char *memory_pressure_path, |
7cae38c4 LP |
1867 | char ***ret) { |
1868 | ||
1869 | _cleanup_strv_free_ char **our_env = NULL; | |
da6053d0 | 1870 | size_t n_env = 0; |
7cae38c4 | 1871 | char *x; |
4d62ee55 | 1872 | int r; |
7cae38c4 | 1873 | |
4b58153d | 1874 | assert(u); |
7cae38c4 | 1875 | assert(c); |
7c1cb6f1 | 1876 | assert(p); |
7cae38c4 LP |
1877 | assert(ret); |
1878 | ||
6bb00842 | 1879 | #define N_ENV_VARS 19 |
8d5bb13d | 1880 | our_env = new0(char*, N_ENV_VARS + _EXEC_DIRECTORY_TYPE_MAX); |
7cae38c4 LP |
1881 | if (!our_env) |
1882 | return -ENOMEM; | |
1883 | ||
1884 | if (n_fds > 0) { | |
8dd4c05b LP |
1885 | _cleanup_free_ char *joined = NULL; |
1886 | ||
df0ff127 | 1887 | if (asprintf(&x, "LISTEN_PID="PID_FMT, getpid_cached()) < 0) |
7cae38c4 LP |
1888 | return -ENOMEM; |
1889 | our_env[n_env++] = x; | |
1890 | ||
da6053d0 | 1891 | if (asprintf(&x, "LISTEN_FDS=%zu", n_fds) < 0) |
7cae38c4 LP |
1892 | return -ENOMEM; |
1893 | our_env[n_env++] = x; | |
8dd4c05b | 1894 | |
cd48e23f | 1895 | joined = strv_join(fdnames, ":"); |
8dd4c05b LP |
1896 | if (!joined) |
1897 | return -ENOMEM; | |
1898 | ||
605405c6 | 1899 | x = strjoin("LISTEN_FDNAMES=", joined); |
8dd4c05b LP |
1900 | if (!x) |
1901 | return -ENOMEM; | |
1902 | our_env[n_env++] = x; | |
7cae38c4 LP |
1903 | } |
1904 | ||
b08af3b1 | 1905 | if ((p->flags & EXEC_SET_WATCHDOG) && p->watchdog_usec > 0) { |
df0ff127 | 1906 | if (asprintf(&x, "WATCHDOG_PID="PID_FMT, getpid_cached()) < 0) |
09812eb7 LP |
1907 | return -ENOMEM; |
1908 | our_env[n_env++] = x; | |
1909 | ||
1e22b5cd | 1910 | if (asprintf(&x, "WATCHDOG_USEC="USEC_FMT, p->watchdog_usec) < 0) |
09812eb7 LP |
1911 | return -ENOMEM; |
1912 | our_env[n_env++] = x; | |
1913 | } | |
1914 | ||
de90700f LP |
1915 | /* If this is D-Bus, tell the nss-systemd module, since it relies on being able to use blocking |
1916 | * Varlink calls back to us for look up dynamic users in PID 1. Break the deadlock between D-Bus and | |
1917 | * PID 1 by disabling use of PID1' NSS interface for looking up dynamic users. */ | |
1918 | if (p->flags & EXEC_NSS_DYNAMIC_BYPASS) { | |
1919 | x = strdup("SYSTEMD_NSS_DYNAMIC_BYPASS=1"); | |
fd63e712 LP |
1920 | if (!x) |
1921 | return -ENOMEM; | |
1922 | our_env[n_env++] = x; | |
1923 | } | |
1924 | ||
7cae38c4 | 1925 | if (home) { |
b910cc72 | 1926 | x = strjoin("HOME=", home); |
7cae38c4 LP |
1927 | if (!x) |
1928 | return -ENOMEM; | |
7bbead1d | 1929 | |
4ff361cc | 1930 | path_simplify(x + 5); |
7cae38c4 LP |
1931 | our_env[n_env++] = x; |
1932 | } | |
1933 | ||
1934 | if (username) { | |
b910cc72 | 1935 | x = strjoin("LOGNAME=", username); |
7cae38c4 LP |
1936 | if (!x) |
1937 | return -ENOMEM; | |
1938 | our_env[n_env++] = x; | |
1939 | ||
b910cc72 | 1940 | x = strjoin("USER=", username); |
7cae38c4 LP |
1941 | if (!x) |
1942 | return -ENOMEM; | |
1943 | our_env[n_env++] = x; | |
1944 | } | |
1945 | ||
1946 | if (shell) { | |
b910cc72 | 1947 | x = strjoin("SHELL=", shell); |
7cae38c4 LP |
1948 | if (!x) |
1949 | return -ENOMEM; | |
7bbead1d | 1950 | |
4ff361cc | 1951 | path_simplify(x + 6); |
7cae38c4 LP |
1952 | our_env[n_env++] = x; |
1953 | } | |
1954 | ||
4b58153d LP |
1955 | if (!sd_id128_is_null(u->invocation_id)) { |
1956 | if (asprintf(&x, "INVOCATION_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)) < 0) | |
1957 | return -ENOMEM; | |
1958 | ||
1959 | our_env[n_env++] = x; | |
1960 | } | |
1961 | ||
6af760f3 | 1962 | if (exec_context_needs_term(c)) { |
4d62ee55 | 1963 | _cleanup_free_ char *cmdline = NULL; |
6af760f3 LP |
1964 | const char *tty_path, *term = NULL; |
1965 | ||
1966 | tty_path = exec_context_tty_path(c); | |
1967 | ||
e8cf09b2 LP |
1968 | /* If we are forked off PID 1 and we are supposed to operate on /dev/console, then let's try |
1969 | * to inherit the $TERM set for PID 1. This is useful for containers so that the $TERM the | |
1970 | * container manager passes to PID 1 ends up all the way in the console login shown. */ | |
6af760f3 | 1971 | |
e8cf09b2 | 1972 | if (path_equal_ptr(tty_path, "/dev/console") && getppid() == 1) |
6af760f3 | 1973 | term = getenv("TERM"); |
4d62ee55 DDM |
1974 | else if (tty_path && in_charset(skip_dev_prefix(tty_path), ALPHANUMERICAL)) { |
1975 | _cleanup_free_ char *key = NULL; | |
1976 | ||
1977 | key = strjoin("systemd.tty.term.", skip_dev_prefix(tty_path)); | |
1978 | if (!key) | |
1979 | return -ENOMEM; | |
1980 | ||
1981 | r = proc_cmdline_get_key(key, 0, &cmdline); | |
1982 | if (r < 0) | |
1983 | log_debug_errno(r, "Failed to read %s from kernel cmdline, ignoring: %m", key); | |
1984 | else if (r > 0) | |
1985 | term = cmdline; | |
1986 | } | |
e8cf09b2 | 1987 | |
6af760f3 LP |
1988 | if (!term) |
1989 | term = default_term_for_tty(tty_path); | |
7cae38c4 | 1990 | |
b910cc72 | 1991 | x = strjoin("TERM=", term); |
7cae38c4 LP |
1992 | if (!x) |
1993 | return -ENOMEM; | |
1994 | our_env[n_env++] = x; | |
1995 | } | |
1996 | ||
7bce046b LP |
1997 | if (journal_stream_dev != 0 && journal_stream_ino != 0) { |
1998 | if (asprintf(&x, "JOURNAL_STREAM=" DEV_FMT ":" INO_FMT, journal_stream_dev, journal_stream_ino) < 0) | |
1999 | return -ENOMEM; | |
2000 | ||
2001 | our_env[n_env++] = x; | |
2002 | } | |
2003 | ||
91dd5f7c LP |
2004 | if (c->log_namespace) { |
2005 | x = strjoin("LOG_NAMESPACE=", c->log_namespace); | |
2006 | if (!x) | |
2007 | return -ENOMEM; | |
2008 | ||
2009 | our_env[n_env++] = x; | |
2010 | } | |
2011 | ||
5b10116e | 2012 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) { |
211a3d87 | 2013 | _cleanup_free_ char *joined = NULL; |
fb2042dd YW |
2014 | const char *n; |
2015 | ||
2016 | if (!p->prefix[t]) | |
2017 | continue; | |
2018 | ||
211a3d87 | 2019 | if (c->directories[t].n_items == 0) |
fb2042dd YW |
2020 | continue; |
2021 | ||
2022 | n = exec_directory_env_name_to_string(t); | |
2023 | if (!n) | |
2024 | continue; | |
2025 | ||
211a3d87 LB |
2026 | for (size_t i = 0; i < c->directories[t].n_items; i++) { |
2027 | _cleanup_free_ char *prefixed = NULL; | |
fb2042dd | 2028 | |
211a3d87 LB |
2029 | prefixed = path_join(p->prefix[t], c->directories[t].items[i].path); |
2030 | if (!prefixed) | |
2031 | return -ENOMEM; | |
2032 | ||
2033 | if (!strextend_with_separator(&joined, ":", prefixed)) | |
2034 | return -ENOMEM; | |
2035 | } | |
fb2042dd YW |
2036 | |
2037 | x = strjoin(n, "=", joined); | |
2038 | if (!x) | |
2039 | return -ENOMEM; | |
2040 | ||
2041 | our_env[n_env++] = x; | |
2042 | } | |
2043 | ||
133e4de2 YW |
2044 | _cleanup_free_ char *creds_dir = NULL; |
2045 | r = exec_context_get_credential_directory(c, p, u->id, &creds_dir); | |
2046 | if (r < 0) | |
2047 | return r; | |
2048 | if (r > 0) { | |
2049 | x = strjoin("CREDENTIALS_DIRECTORY=", creds_dir); | |
bb0c0d6f LP |
2050 | if (!x) |
2051 | return -ENOMEM; | |
2052 | ||
2053 | our_env[n_env++] = x; | |
2054 | } | |
2055 | ||
dc4e2940 YW |
2056 | if (asprintf(&x, "SYSTEMD_EXEC_PID=" PID_FMT, getpid_cached()) < 0) |
2057 | return -ENOMEM; | |
2058 | ||
2059 | our_env[n_env++] = x; | |
2060 | ||
6bb00842 LP |
2061 | if (memory_pressure_path) { |
2062 | x = strjoin("MEMORY_PRESSURE_WATCH=", memory_pressure_path); | |
2063 | if (!x) | |
2064 | return -ENOMEM; | |
2065 | ||
2066 | our_env[n_env++] = x; | |
2067 | ||
2068 | if (cgroup_context && !path_equal(memory_pressure_path, "/dev/null")) { | |
2069 | _cleanup_free_ char *b = NULL, *e = NULL; | |
2070 | ||
2071 | if (asprintf(&b, "%s " USEC_FMT " " USEC_FMT, | |
2072 | MEMORY_PRESSURE_DEFAULT_TYPE, | |
2073 | cgroup_context->memory_pressure_threshold_usec == USEC_INFINITY ? MEMORY_PRESSURE_DEFAULT_THRESHOLD_USEC : | |
2074 | CLAMP(cgroup_context->memory_pressure_threshold_usec, 1U, MEMORY_PRESSURE_DEFAULT_WINDOW_USEC), | |
2075 | MEMORY_PRESSURE_DEFAULT_WINDOW_USEC) < 0) | |
2076 | return -ENOMEM; | |
2077 | ||
2078 | if (base64mem(b, strlen(b) + 1, &e) < 0) | |
2079 | return -ENOMEM; | |
2080 | ||
2081 | x = strjoin("MEMORY_PRESSURE_WRITE=", e); | |
2082 | if (!x) | |
2083 | return -ENOMEM; | |
2084 | ||
2085 | our_env[n_env++] = x; | |
2086 | } | |
2087 | } | |
2088 | ||
2089 | assert(n_env < N_ENV_VARS + _EXEC_DIRECTORY_TYPE_MAX); | |
8d5bb13d | 2090 | #undef N_ENV_VARS |
7cae38c4 | 2091 | |
ae2a15bc | 2092 | *ret = TAKE_PTR(our_env); |
7cae38c4 LP |
2093 | |
2094 | return 0; | |
2095 | } | |
2096 | ||
b4c14404 FB |
2097 | static int build_pass_environment(const ExecContext *c, char ***ret) { |
2098 | _cleanup_strv_free_ char **pass_env = NULL; | |
319a4f4b | 2099 | size_t n_env = 0; |
b4c14404 FB |
2100 | |
2101 | STRV_FOREACH(i, c->pass_environment) { | |
2102 | _cleanup_free_ char *x = NULL; | |
2103 | char *v; | |
2104 | ||
2105 | v = getenv(*i); | |
2106 | if (!v) | |
2107 | continue; | |
605405c6 | 2108 | x = strjoin(*i, "=", v); |
b4c14404 FB |
2109 | if (!x) |
2110 | return -ENOMEM; | |
00819cc1 | 2111 | |
319a4f4b | 2112 | if (!GREEDY_REALLOC(pass_env, n_env + 2)) |
b4c14404 | 2113 | return -ENOMEM; |
00819cc1 | 2114 | |
1cc6c93a | 2115 | pass_env[n_env++] = TAKE_PTR(x); |
b4c14404 | 2116 | pass_env[n_env] = NULL; |
b4c14404 FB |
2117 | } |
2118 | ||
ae2a15bc | 2119 | *ret = TAKE_PTR(pass_env); |
b4c14404 FB |
2120 | |
2121 | return 0; | |
2122 | } | |
2123 | ||
fbbb9697 YW |
2124 | bool exec_needs_network_namespace(const ExecContext *context) { |
2125 | assert(context); | |
2126 | ||
2127 | return context->private_network || context->network_namespace_path; | |
2128 | } | |
2129 | ||
9c0c6701 DDM |
2130 | static bool exec_needs_ephemeral(const ExecContext *context) { |
2131 | return (context->root_image || context->root_directory) && context->root_ephemeral; | |
2132 | } | |
2133 | ||
fde36d25 YW |
2134 | static bool exec_needs_ipc_namespace(const ExecContext *context) { |
2135 | assert(context); | |
2136 | ||
2137 | return context->private_ipc || context->ipc_namespace_path; | |
2138 | } | |
2139 | ||
5e8deb94 | 2140 | bool exec_needs_mount_namespace( |
8b44a3d2 LP |
2141 | const ExecContext *context, |
2142 | const ExecParameters *params, | |
28135da3 | 2143 | const ExecRuntime *runtime) { |
8b44a3d2 LP |
2144 | |
2145 | assert(context); | |
8b44a3d2 | 2146 | |
915e6d16 LP |
2147 | if (context->root_image) |
2148 | return true; | |
2149 | ||
2a624c36 AP |
2150 | if (!strv_isempty(context->read_write_paths) || |
2151 | !strv_isempty(context->read_only_paths) || | |
ddc155b2 TM |
2152 | !strv_isempty(context->inaccessible_paths) || |
2153 | !strv_isempty(context->exec_paths) || | |
2154 | !strv_isempty(context->no_exec_paths)) | |
8b44a3d2 LP |
2155 | return true; |
2156 | ||
42b1d8e0 | 2157 | if (context->n_bind_mounts > 0) |
d2d6c096 LP |
2158 | return true; |
2159 | ||
2abd4e38 YW |
2160 | if (context->n_temporary_filesystems > 0) |
2161 | return true; | |
2162 | ||
b3d13314 LB |
2163 | if (context->n_mount_images > 0) |
2164 | return true; | |
2165 | ||
93f59701 LB |
2166 | if (context->n_extension_images > 0) |
2167 | return true; | |
2168 | ||
a07b9926 LB |
2169 | if (!strv_isempty(context->extension_directories)) |
2170 | return true; | |
2171 | ||
874cdcbc | 2172 | if (!IN_SET(context->mount_propagation_flag, 0, MS_SHARED)) |
8b44a3d2 LP |
2173 | return true; |
2174 | ||
28135da3 | 2175 | if (context->private_tmp && runtime && runtime->shared && (runtime->shared->tmp_dir || runtime->shared->var_tmp_dir)) |
8b44a3d2 LP |
2176 | return true; |
2177 | ||
8b44a3d2 | 2178 | if (context->private_devices || |
24002121 | 2179 | context->private_mounts > 0 || |
c2da3bf2 | 2180 | (context->private_mounts < 0 && exec_needs_network_namespace(context)) || |
8b44a3d2 | 2181 | context->protect_system != PROTECT_SYSTEM_NO || |
59eeb84b LP |
2182 | context->protect_home != PROTECT_HOME_NO || |
2183 | context->protect_kernel_tunables || | |
c575770b | 2184 | context->protect_kernel_modules || |
94a7b275 | 2185 | context->protect_kernel_logs || |
4e399953 LP |
2186 | context->protect_control_groups || |
2187 | context->protect_proc != PROTECT_PROC_DEFAULT || | |
80271a44 | 2188 | context->proc_subset != PROC_SUBSET_ALL || |
fde36d25 | 2189 | exec_needs_ipc_namespace(context)) |
8b44a3d2 LP |
2190 | return true; |
2191 | ||
37c56f89 | 2192 | if (context->root_directory) { |
5e98086d | 2193 | if (exec_context_get_effective_mount_apivfs(context)) |
37c56f89 YW |
2194 | return true; |
2195 | ||
5b10116e | 2196 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) { |
5e8deb94 | 2197 | if (params && !params->prefix[t]) |
37c56f89 YW |
2198 | continue; |
2199 | ||
211a3d87 | 2200 | if (context->directories[t].n_items > 0) |
37c56f89 YW |
2201 | return true; |
2202 | } | |
2203 | } | |
5d997827 | 2204 | |
42b1d8e0 | 2205 | if (context->dynamic_user && |
211a3d87 LB |
2206 | (context->directories[EXEC_DIRECTORY_STATE].n_items > 0 || |
2207 | context->directories[EXEC_DIRECTORY_CACHE].n_items > 0 || | |
2208 | context->directories[EXEC_DIRECTORY_LOGS].n_items > 0)) | |
42b1d8e0 YW |
2209 | return true; |
2210 | ||
91dd5f7c LP |
2211 | if (context->log_namespace) |
2212 | return true; | |
2213 | ||
8b44a3d2 LP |
2214 | return false; |
2215 | } | |
2216 | ||
5749f855 | 2217 | static int setup_private_users(uid_t ouid, gid_t ogid, uid_t uid, gid_t gid) { |
d251207d | 2218 | _cleanup_free_ char *uid_map = NULL, *gid_map = NULL; |
19ee48a6 | 2219 | _cleanup_close_pair_ int errno_pipe[2] = PIPE_EBADF; |
254d1313 | 2220 | _cleanup_close_ int unshare_ready_fd = -EBADF; |
d251207d LP |
2221 | _cleanup_(sigkill_waitp) pid_t pid = 0; |
2222 | uint64_t c = 1; | |
d251207d LP |
2223 | ssize_t n; |
2224 | int r; | |
2225 | ||
5749f855 AZ |
2226 | /* Set up a user namespace and map the original UID/GID (IDs from before any user or group changes, i.e. |
2227 | * the IDs from the user or system manager(s)) to itself, the selected UID/GID to itself, and everything else to | |
d251207d LP |
2228 | * nobody. In order to be able to write this mapping we need CAP_SETUID in the original user namespace, which |
2229 | * we however lack after opening the user namespace. To work around this we fork() a temporary child process, | |
2230 | * which waits for the parent to create the new user namespace while staying in the original namespace. The | |
2231 | * child then writes the UID mapping, under full privileges. The parent waits for the child to finish and | |
5749f855 AZ |
2232 | * continues execution normally. |
2233 | * For unprivileged users (i.e. without capabilities), the root to root mapping is excluded. As such, it | |
2234 | * does not need CAP_SETUID to write the single line mapping to itself. */ | |
d251207d | 2235 | |
5749f855 | 2236 | /* Can only set up multiple mappings with CAP_SETUID. */ |
26c45a6c | 2237 | if (have_effective_cap(CAP_SETUID) > 0 && uid != ouid && uid_is_valid(uid)) |
587ab01b | 2238 | r = asprintf(&uid_map, |
5749f855 | 2239 | UID_FMT " " UID_FMT " 1\n" /* Map $OUID → $OUID */ |
587ab01b | 2240 | UID_FMT " " UID_FMT " 1\n", /* Map $UID → $UID */ |
5749f855 AZ |
2241 | ouid, ouid, uid, uid); |
2242 | else | |
2243 | r = asprintf(&uid_map, | |
2244 | UID_FMT " " UID_FMT " 1\n", /* Map $OUID → $OUID */ | |
2245 | ouid, ouid); | |
d251207d | 2246 | |
5749f855 AZ |
2247 | if (r < 0) |
2248 | return -ENOMEM; | |
2249 | ||
2250 | /* Can only set up multiple mappings with CAP_SETGID. */ | |
26c45a6c | 2251 | if (have_effective_cap(CAP_SETGID) > 0 && gid != ogid && gid_is_valid(gid)) |
587ab01b | 2252 | r = asprintf(&gid_map, |
5749f855 | 2253 | GID_FMT " " GID_FMT " 1\n" /* Map $OGID → $OGID */ |
587ab01b | 2254 | GID_FMT " " GID_FMT " 1\n", /* Map $GID → $GID */ |
5749f855 AZ |
2255 | ogid, ogid, gid, gid); |
2256 | else | |
2257 | r = asprintf(&gid_map, | |
2258 | GID_FMT " " GID_FMT " 1\n", /* Map $OGID -> $OGID */ | |
2259 | ogid, ogid); | |
2260 | ||
2261 | if (r < 0) | |
2262 | return -ENOMEM; | |
d251207d LP |
2263 | |
2264 | /* Create a communication channel so that the parent can tell the child when it finished creating the user | |
2265 | * namespace. */ | |
2266 | unshare_ready_fd = eventfd(0, EFD_CLOEXEC); | |
2267 | if (unshare_ready_fd < 0) | |
2268 | return -errno; | |
2269 | ||
2270 | /* Create a communication channel so that the child can tell the parent a proper error code in case it | |
2271 | * failed. */ | |
2272 | if (pipe2(errno_pipe, O_CLOEXEC) < 0) | |
2273 | return -errno; | |
2274 | ||
4c253ed1 LP |
2275 | r = safe_fork("(sd-userns)", FORK_RESET_SIGNALS|FORK_DEATHSIG, &pid); |
2276 | if (r < 0) | |
2277 | return r; | |
2278 | if (r == 0) { | |
254d1313 | 2279 | _cleanup_close_ int fd = -EBADF; |
d251207d LP |
2280 | const char *a; |
2281 | pid_t ppid; | |
2282 | ||
2283 | /* Child process, running in the original user namespace. Let's update the parent's UID/GID map from | |
2284 | * here, after the parent opened its own user namespace. */ | |
2285 | ||
2286 | ppid = getppid(); | |
2287 | errno_pipe[0] = safe_close(errno_pipe[0]); | |
2288 | ||
2289 | /* Wait until the parent unshared the user namespace */ | |
2290 | if (read(unshare_ready_fd, &c, sizeof(c)) < 0) { | |
2291 | r = -errno; | |
2292 | goto child_fail; | |
2293 | } | |
2294 | ||
2295 | /* Disable the setgroups() system call in the child user namespace, for good. */ | |
2296 | a = procfs_file_alloca(ppid, "setgroups"); | |
2297 | fd = open(a, O_WRONLY|O_CLOEXEC); | |
2298 | if (fd < 0) { | |
2299 | if (errno != ENOENT) { | |
2300 | r = -errno; | |
2301 | goto child_fail; | |
2302 | } | |
2303 | ||
2304 | /* If the file is missing the kernel is too old, let's continue anyway. */ | |
2305 | } else { | |
2306 | if (write(fd, "deny\n", 5) < 0) { | |
2307 | r = -errno; | |
2308 | goto child_fail; | |
2309 | } | |
2310 | ||
2311 | fd = safe_close(fd); | |
2312 | } | |
2313 | ||
2314 | /* First write the GID map */ | |
2315 | a = procfs_file_alloca(ppid, "gid_map"); | |
2316 | fd = open(a, O_WRONLY|O_CLOEXEC); | |
2317 | if (fd < 0) { | |
2318 | r = -errno; | |
2319 | goto child_fail; | |
2320 | } | |
2321 | if (write(fd, gid_map, strlen(gid_map)) < 0) { | |
2322 | r = -errno; | |
2323 | goto child_fail; | |
2324 | } | |
2325 | fd = safe_close(fd); | |
2326 | ||
2327 | /* The write the UID map */ | |
2328 | a = procfs_file_alloca(ppid, "uid_map"); | |
2329 | fd = open(a, O_WRONLY|O_CLOEXEC); | |
2330 | if (fd < 0) { | |
2331 | r = -errno; | |
2332 | goto child_fail; | |
2333 | } | |
2334 | if (write(fd, uid_map, strlen(uid_map)) < 0) { | |
2335 | r = -errno; | |
2336 | goto child_fail; | |
2337 | } | |
2338 | ||
2339 | _exit(EXIT_SUCCESS); | |
2340 | ||
2341 | child_fail: | |
2342 | (void) write(errno_pipe[1], &r, sizeof(r)); | |
2343 | _exit(EXIT_FAILURE); | |
2344 | } | |
2345 | ||
2346 | errno_pipe[1] = safe_close(errno_pipe[1]); | |
2347 | ||
2348 | if (unshare(CLONE_NEWUSER) < 0) | |
2349 | return -errno; | |
2350 | ||
2351 | /* Let the child know that the namespace is ready now */ | |
2352 | if (write(unshare_ready_fd, &c, sizeof(c)) < 0) | |
2353 | return -errno; | |
2354 | ||
2355 | /* Try to read an error code from the child */ | |
2356 | n = read(errno_pipe[0], &r, sizeof(r)); | |
2357 | if (n < 0) | |
2358 | return -errno; | |
2359 | if (n == sizeof(r)) { /* an error code was sent to us */ | |
2360 | if (r < 0) | |
2361 | return r; | |
2362 | return -EIO; | |
2363 | } | |
2364 | if (n != 0) /* on success we should have read 0 bytes */ | |
2365 | return -EIO; | |
2366 | ||
8f03de53 | 2367 | r = wait_for_terminate_and_check("(sd-userns)", TAKE_PID(pid), 0); |
d251207d LP |
2368 | if (r < 0) |
2369 | return r; | |
2e87a1fd | 2370 | if (r != EXIT_SUCCESS) /* If something strange happened with the child, let's consider this fatal, too */ |
d251207d LP |
2371 | return -EIO; |
2372 | ||
2373 | return 0; | |
2374 | } | |
2375 | ||
494d0247 | 2376 | static bool exec_directory_is_private(const ExecContext *context, ExecDirectoryType type) { |
e43911a7 LP |
2377 | assert(context); |
2378 | ||
494d0247 YW |
2379 | if (!context->dynamic_user) |
2380 | return false; | |
2381 | ||
2382 | if (type == EXEC_DIRECTORY_CONFIGURATION) | |
2383 | return false; | |
2384 | ||
2385 | if (type == EXEC_DIRECTORY_RUNTIME && context->runtime_directory_preserve_mode == EXEC_PRESERVE_NO) | |
2386 | return false; | |
2387 | ||
2388 | return true; | |
2389 | } | |
2390 | ||
211a3d87 LB |
2391 | static int create_many_symlinks(const char *root, const char *source, char **symlinks) { |
2392 | _cleanup_free_ char *src_abs = NULL; | |
211a3d87 LB |
2393 | int r; |
2394 | ||
2395 | assert(source); | |
2396 | ||
2397 | src_abs = path_join(root, source); | |
2398 | if (!src_abs) | |
2399 | return -ENOMEM; | |
2400 | ||
2401 | STRV_FOREACH(dst, symlinks) { | |
2402 | _cleanup_free_ char *dst_abs = NULL; | |
2403 | ||
2404 | dst_abs = path_join(root, *dst); | |
2405 | if (!dst_abs) | |
2406 | return -ENOMEM; | |
2407 | ||
2408 | r = mkdir_parents_label(dst_abs, 0755); | |
2409 | if (r < 0) | |
2410 | return r; | |
2411 | ||
2412 | r = symlink_idempotent(src_abs, dst_abs, true); | |
2413 | if (r < 0) | |
2414 | return r; | |
2415 | } | |
2416 | ||
2417 | return 0; | |
2418 | } | |
2419 | ||
3536f49e | 2420 | static int setup_exec_directory( |
59dd2bbb | 2421 | Unit *u, |
07689d5d LP |
2422 | const ExecContext *context, |
2423 | const ExecParameters *params, | |
2424 | uid_t uid, | |
3536f49e | 2425 | gid_t gid, |
3536f49e | 2426 | ExecDirectoryType type, |
211a3d87 | 2427 | bool needs_mount_namespace, |
3536f49e | 2428 | int *exit_status) { |
07689d5d | 2429 | |
72fd1768 | 2430 | static const int exit_status_table[_EXEC_DIRECTORY_TYPE_MAX] = { |
3536f49e YW |
2431 | [EXEC_DIRECTORY_RUNTIME] = EXIT_RUNTIME_DIRECTORY, |
2432 | [EXEC_DIRECTORY_STATE] = EXIT_STATE_DIRECTORY, | |
2433 | [EXEC_DIRECTORY_CACHE] = EXIT_CACHE_DIRECTORY, | |
2434 | [EXEC_DIRECTORY_LOGS] = EXIT_LOGS_DIRECTORY, | |
2435 | [EXEC_DIRECTORY_CONFIGURATION] = EXIT_CONFIGURATION_DIRECTORY, | |
2436 | }; | |
07689d5d LP |
2437 | int r; |
2438 | ||
2439 | assert(context); | |
2440 | assert(params); | |
72fd1768 | 2441 | assert(type >= 0 && type < _EXEC_DIRECTORY_TYPE_MAX); |
3536f49e | 2442 | assert(exit_status); |
07689d5d | 2443 | |
3536f49e YW |
2444 | if (!params->prefix[type]) |
2445 | return 0; | |
2446 | ||
8679efde | 2447 | if (params->flags & EXEC_CHOWN_DIRECTORIES) { |
3536f49e YW |
2448 | if (!uid_is_valid(uid)) |
2449 | uid = 0; | |
2450 | if (!gid_is_valid(gid)) | |
2451 | gid = 0; | |
2452 | } | |
2453 | ||
211a3d87 | 2454 | for (size_t i = 0; i < context->directories[type].n_items; i++) { |
6c47cd7d | 2455 | _cleanup_free_ char *p = NULL, *pp = NULL; |
07689d5d | 2456 | |
211a3d87 | 2457 | p = path_join(params->prefix[type], context->directories[type].items[i].path); |
3536f49e YW |
2458 | if (!p) { |
2459 | r = -ENOMEM; | |
2460 | goto fail; | |
2461 | } | |
07689d5d | 2462 | |
23a7448e YW |
2463 | r = mkdir_parents_label(p, 0755); |
2464 | if (r < 0) | |
3536f49e | 2465 | goto fail; |
23a7448e | 2466 | |
f9c91932 LP |
2467 | if (IN_SET(type, EXEC_DIRECTORY_STATE, EXEC_DIRECTORY_LOGS) && params->runtime_scope == RUNTIME_SCOPE_USER) { |
2468 | ||
2469 | /* If we are in user mode, and a configuration directory exists but a state directory | |
2470 | * doesn't exist, then we likely are upgrading from an older systemd version that | |
2471 | * didn't know the more recent addition to the xdg-basedir spec: the $XDG_STATE_HOME | |
2472 | * directory. In older systemd versions EXEC_DIRECTORY_STATE was aliased to | |
2473 | * EXEC_DIRECTORY_CONFIGURATION, with the advent of $XDG_STATE_HOME is is now | |
627cdcc7 | 2474 | * separated. If a service has both dirs configured but only the configuration dir |
f9c91932 LP |
2475 | * exists and the state dir does not, we assume we are looking at an update |
2476 | * situation. Hence, create a compatibility symlink, so that all expectations are | |
2477 | * met. | |
2478 | * | |
2479 | * (We also do something similar with the log directory, which still doesn't exist in | |
2480 | * the xdg basedir spec. We'll make it a subdir of the state dir.) */ | |
2481 | ||
2482 | /* this assumes the state dir is always created before the configuration dir */ | |
2483 | assert_cc(EXEC_DIRECTORY_STATE < EXEC_DIRECTORY_LOGS); | |
2484 | assert_cc(EXEC_DIRECTORY_LOGS < EXEC_DIRECTORY_CONFIGURATION); | |
2485 | ||
2486 | r = laccess(p, F_OK); | |
2487 | if (r == -ENOENT) { | |
2488 | _cleanup_free_ char *q = NULL; | |
2489 | ||
2490 | /* OK, we know that the state dir does not exist. Let's see if the dir exists | |
2491 | * under the configuration hierarchy. */ | |
2492 | ||
2493 | if (type == EXEC_DIRECTORY_STATE) | |
2494 | q = path_join(params->prefix[EXEC_DIRECTORY_CONFIGURATION], context->directories[type].items[i].path); | |
2495 | else if (type == EXEC_DIRECTORY_LOGS) | |
2496 | q = path_join(params->prefix[EXEC_DIRECTORY_CONFIGURATION], "log", context->directories[type].items[i].path); | |
2497 | else | |
2498 | assert_not_reached(); | |
2499 | if (!q) { | |
2500 | r = -ENOMEM; | |
2501 | goto fail; | |
2502 | } | |
2503 | ||
2504 | r = laccess(q, F_OK); | |
2505 | if (r >= 0) { | |
2506 | /* It does exist! This hence looks like an update. Symlink the | |
2507 | * configuration directory into the state directory. */ | |
2508 | ||
2509 | r = symlink_idempotent(q, p, /* make_relative= */ true); | |
2510 | if (r < 0) | |
2511 | goto fail; | |
2512 | ||
59dd2bbb | 2513 | log_unit_notice(u, "Unit state directory %s missing but matching configuration directory %s exists, assuming update from systemd 253 or older, creating compatibility symlink.", p, q); |
f9c91932 LP |
2514 | continue; |
2515 | } else if (r != -ENOENT) | |
59dd2bbb | 2516 | log_unit_warning_errno(u, r, "Unable to detect whether unit configuration directory '%s' exists, assuming not: %m", q); |
f9c91932 LP |
2517 | |
2518 | } else if (r < 0) | |
59dd2bbb | 2519 | log_unit_warning_errno(u, r, "Unable to detect whether unit state directory '%s' is missing, assuming it is: %m", p); |
f9c91932 LP |
2520 | } |
2521 | ||
494d0247 | 2522 | if (exec_directory_is_private(context, type)) { |
3f5b1508 LP |
2523 | /* So, here's one extra complication when dealing with DynamicUser=1 units. In that |
2524 | * case we want to avoid leaving a directory around fully accessible that is owned by | |
2525 | * a dynamic user whose UID is later on reused. To lock this down we use the same | |
2526 | * trick used by container managers to prohibit host users to get access to files of | |
2527 | * the same UID in containers: we place everything inside a directory that has an | |
2528 | * access mode of 0700 and is owned root:root, so that it acts as security boundary | |
2529 | * for unprivileged host code. We then use fs namespacing to make this directory | |
2530 | * permeable for the service itself. | |
6c47cd7d | 2531 | * |
3f5b1508 LP |
2532 | * Specifically: for a service which wants a special directory "foo/" we first create |
2533 | * a directory "private/" with access mode 0700 owned by root:root. Then we place | |
2534 | * "foo" inside of that directory (i.e. "private/foo/"), and make "foo" a symlink to | |
2535 | * "private/foo". This way, privileged host users can access "foo/" as usual, but | |
2536 | * unprivileged host users can't look into it. Inside of the namespace of the unit | |
2537 | * "private/" is replaced by a more liberally accessible tmpfs, into which the host's | |
2538 | * "private/foo/" is mounted under the same name, thus disabling the access boundary | |
2539 | * for the service and making sure it only gets access to the dirs it needs but no | |
2540 | * others. Tricky? Yes, absolutely, but it works! | |
6c47cd7d | 2541 | * |
3f5b1508 LP |
2542 | * Note that we don't do this for EXEC_DIRECTORY_CONFIGURATION as that's assumed not |
2543 | * to be owned by the service itself. | |
2544 | * | |
2545 | * Also, note that we don't do this for EXEC_DIRECTORY_RUNTIME as that's often used | |
2546 | * for sharing files or sockets with other services. */ | |
6c47cd7d | 2547 | |
4ede9802 LP |
2548 | pp = path_join(params->prefix[type], "private"); |
2549 | if (!pp) { | |
6c47cd7d LP |
2550 | r = -ENOMEM; |
2551 | goto fail; | |
2552 | } | |
2553 | ||
2554 | /* First set up private root if it doesn't exist yet, with access mode 0700 and owned by root:root */ | |
4ede9802 | 2555 | r = mkdir_safe_label(pp, 0700, 0, 0, MKDIR_WARN_MODE); |
6c47cd7d LP |
2556 | if (r < 0) |
2557 | goto fail; | |
2558 | ||
211a3d87 | 2559 | if (!path_extend(&pp, context->directories[type].items[i].path)) { |
6c47cd7d LP |
2560 | r = -ENOMEM; |
2561 | goto fail; | |
2562 | } | |
2563 | ||
2564 | /* Create all directories between the configured directory and this private root, and mark them 0755 */ | |
2565 | r = mkdir_parents_label(pp, 0755); | |
2566 | if (r < 0) | |
2567 | goto fail; | |
2568 | ||
949befd3 | 2569 | if (is_dir(p, false) > 0 && |
b93d24e0 | 2570 | (laccess(pp, F_OK) == -ENOENT)) { |
949befd3 LP |
2571 | |
2572 | /* Hmm, the private directory doesn't exist yet, but the normal one exists? If so, move | |
2573 | * it over. Most likely the service has been upgraded from one that didn't use | |
2574 | * DynamicUser=1, to one that does. */ | |
2575 | ||
59dd2bbb LP |
2576 | log_unit_info(u, "Found pre-existing public %s= directory %s, migrating to %s.\n" |
2577 | "Apparently, service previously had DynamicUser= turned off, and has now turned it on.", | |
2578 | exec_directory_type_to_string(type), p, pp); | |
cf52c45d | 2579 | |
db58f5de LP |
2580 | r = RET_NERRNO(rename(p, pp)); |
2581 | if (r < 0) | |
949befd3 | 2582 | goto fail; |
949befd3 LP |
2583 | } else { |
2584 | /* Otherwise, create the actual directory for the service */ | |
2585 | ||
2586 | r = mkdir_label(pp, context->directories[type].mode); | |
2587 | if (r < 0 && r != -EEXIST) | |
2588 | goto fail; | |
2589 | } | |
6c47cd7d | 2590 | |
a2ab603c YW |
2591 | if (!context->directories[type].items[i].only_create) { |
2592 | /* And link it up from the original place. | |
2593 | * Notes | |
2594 | * 1) If a mount namespace is going to be used, then this symlink remains on | |
2595 | * the host, and a new one for the child namespace will be created later. | |
2596 | * 2) It is not necessary to create this symlink when one of its parent | |
2597 | * directories is specified and already created. E.g. | |
2598 | * StateDirectory=foo foo/bar | |
2599 | * In that case, the inode points to pp and p for "foo/bar" are the same: | |
2600 | * pp = "/var/lib/private/foo/bar" | |
2601 | * p = "/var/lib/foo/bar" | |
2602 | * and, /var/lib/foo is a symlink to /var/lib/private/foo. So, not only | |
2603 | * we do not need to create the symlink, but we cannot create the symlink. | |
2604 | * See issue #24783. */ | |
2605 | r = symlink_idempotent(pp, p, true); | |
2606 | if (r < 0) | |
2607 | goto fail; | |
2608 | } | |
6c47cd7d | 2609 | |
6c47cd7d | 2610 | } else { |
5c6d40d1 LP |
2611 | _cleanup_free_ char *target = NULL; |
2612 | ||
2613 | if (type != EXEC_DIRECTORY_CONFIGURATION && | |
2614 | readlink_and_make_absolute(p, &target) >= 0) { | |
578dc69f | 2615 | _cleanup_free_ char *q = NULL, *q_resolved = NULL, *target_resolved = NULL; |
5c6d40d1 LP |
2616 | |
2617 | /* This already exists and is a symlink? Interesting. Maybe it's one created | |
2193f17c LP |
2618 | * by DynamicUser=1 (see above)? |
2619 | * | |
2620 | * We do this for all directory types except for ConfigurationDirectory=, | |
2621 | * since they all support the private/ symlink logic at least in some | |
2622 | * configurations, see above. */ | |
5c6d40d1 | 2623 | |
f461a28d | 2624 | r = chase(target, NULL, 0, &target_resolved, NULL); |
578dc69f YW |
2625 | if (r < 0) |
2626 | goto fail; | |
2627 | ||
211a3d87 | 2628 | q = path_join(params->prefix[type], "private", context->directories[type].items[i].path); |
5c6d40d1 LP |
2629 | if (!q) { |
2630 | r = -ENOMEM; | |
2631 | goto fail; | |
2632 | } | |
2633 | ||
578dc69f | 2634 | /* /var/lib or friends may be symlinks. So, let's chase them also. */ |
f461a28d | 2635 | r = chase(q, NULL, CHASE_NONEXISTENT, &q_resolved, NULL); |
578dc69f YW |
2636 | if (r < 0) |
2637 | goto fail; | |
2638 | ||
2639 | if (path_equal(q_resolved, target_resolved)) { | |
5c6d40d1 LP |
2640 | |
2641 | /* Hmm, apparently DynamicUser= was once turned on for this service, | |
2642 | * but is no longer. Let's move the directory back up. */ | |
2643 | ||
59dd2bbb LP |
2644 | log_unit_info(u, "Found pre-existing private %s= directory %s, migrating to %s.\n" |
2645 | "Apparently, service previously had DynamicUser= turned on, and has now turned it off.", | |
2646 | exec_directory_type_to_string(type), q, p); | |
cf52c45d | 2647 | |
db58f5de LP |
2648 | r = RET_NERRNO(unlink(p)); |
2649 | if (r < 0) | |
5c6d40d1 | 2650 | goto fail; |
5c6d40d1 | 2651 | |
db58f5de LP |
2652 | r = RET_NERRNO(rename(q, p)); |
2653 | if (r < 0) | |
5c6d40d1 | 2654 | goto fail; |
5c6d40d1 LP |
2655 | } |
2656 | } | |
2657 | ||
6c47cd7d | 2658 | r = mkdir_label(p, context->directories[type].mode); |
d484580c | 2659 | if (r < 0) { |
d484580c LP |
2660 | if (r != -EEXIST) |
2661 | goto fail; | |
2662 | ||
206e9864 LP |
2663 | if (type == EXEC_DIRECTORY_CONFIGURATION) { |
2664 | struct stat st; | |
2665 | ||
2666 | /* Don't change the owner/access mode of the configuration directory, | |
2667 | * as in the common case it is not written to by a service, and shall | |
2668 | * not be writable. */ | |
2669 | ||
db58f5de LP |
2670 | r = RET_NERRNO(stat(p, &st)); |
2671 | if (r < 0) | |
206e9864 | 2672 | goto fail; |
206e9864 LP |
2673 | |
2674 | /* Still complain if the access mode doesn't match */ | |
2675 | if (((st.st_mode ^ context->directories[type].mode) & 07777) != 0) | |
59dd2bbb LP |
2676 | log_unit_warning(u, "%s \'%s\' already exists but the mode is different. " |
2677 | "(File system: %o %sMode: %o)", | |
2678 | exec_directory_type_to_string(type), context->directories[type].items[i].path, | |
2679 | st.st_mode & 07777, exec_directory_type_to_string(type), context->directories[type].mode & 07777); | |
206e9864 | 2680 | |
6cff72eb | 2681 | continue; |
206e9864 | 2682 | } |
6cff72eb | 2683 | } |
a1164ae3 | 2684 | } |
07689d5d | 2685 | |
206e9864 | 2686 | /* Lock down the access mode (we use chmod_and_chown() to make this idempotent. We don't |
5238e957 | 2687 | * specify UID/GID here, so that path_chown_recursive() can optimize things depending on the |
206e9864 LP |
2688 | * current UID/GID ownership.) */ |
2689 | r = chmod_and_chown(pp ?: p, context->directories[type].mode, UID_INVALID, GID_INVALID); | |
2690 | if (r < 0) | |
2691 | goto fail; | |
c71b2eb7 | 2692 | |
f5bb36dc LP |
2693 | /* Skip the rest (which deals with ownership) in user mode, since ownership changes are not |
2694 | * available to user code anyway */ | |
2695 | if (params->runtime_scope != RUNTIME_SCOPE_SYSTEM) | |
2696 | continue; | |
2697 | ||
607b358e LP |
2698 | /* Then, change the ownership of the whole tree, if necessary. When dynamic users are used we |
2699 | * drop the suid/sgid bits, since we really don't want SUID/SGID files for dynamic UID/GID | |
7802194a | 2700 | * assignments to exist. */ |
d5602c16 | 2701 | r = path_chown_recursive(pp ?: p, uid, gid, context->dynamic_user ? 01777 : 07777, AT_SYMLINK_FOLLOW); |
07689d5d | 2702 | if (r < 0) |
3536f49e | 2703 | goto fail; |
07689d5d LP |
2704 | } |
2705 | ||
211a3d87 LB |
2706 | /* If we are not going to run in a namespace, set up the symlinks - otherwise |
2707 | * they are set up later, to allow configuring empty var/run/etc. */ | |
2708 | if (!needs_mount_namespace) | |
2709 | for (size_t i = 0; i < context->directories[type].n_items; i++) { | |
2710 | r = create_many_symlinks(params->prefix[type], | |
2711 | context->directories[type].items[i].path, | |
2712 | context->directories[type].items[i].symlinks); | |
2713 | if (r < 0) | |
2714 | goto fail; | |
2715 | } | |
2716 | ||
07689d5d | 2717 | return 0; |
3536f49e YW |
2718 | |
2719 | fail: | |
2720 | *exit_status = exit_status_table[type]; | |
3536f49e | 2721 | return r; |
07689d5d LP |
2722 | } |
2723 | ||
92b423b9 | 2724 | #if ENABLE_SMACK |
cefc33ae | 2725 | static int setup_smack( |
aa5ae971 | 2726 | const Manager *manager, |
cefc33ae | 2727 | const ExecContext *context, |
b83d5050 | 2728 | int executable_fd) { |
cefc33ae LP |
2729 | int r; |
2730 | ||
2731 | assert(context); | |
b83d5050 | 2732 | assert(executable_fd >= 0); |
cefc33ae | 2733 | |
cefc33ae LP |
2734 | if (context->smack_process_label) { |
2735 | r = mac_smack_apply_pid(0, context->smack_process_label); | |
2736 | if (r < 0) | |
2737 | return r; | |
c9e120e0 | 2738 | } else if (manager->defaults.smack_process_label) { |
cefc33ae LP |
2739 | _cleanup_free_ char *exec_label = NULL; |
2740 | ||
b83d5050 | 2741 | r = mac_smack_read_fd(executable_fd, SMACK_ATTR_EXEC, &exec_label); |
00675c36 | 2742 | if (r < 0 && !ERRNO_IS_XATTR_ABSENT(r)) |
cefc33ae LP |
2743 | return r; |
2744 | ||
c9e120e0 | 2745 | r = mac_smack_apply_pid(0, exec_label ?: manager->defaults.smack_process_label); |
cefc33ae LP |
2746 | if (r < 0) |
2747 | return r; | |
2748 | } | |
cefc33ae LP |
2749 | |
2750 | return 0; | |
2751 | } | |
92b423b9 | 2752 | #endif |
cefc33ae | 2753 | |
6c47cd7d LP |
2754 | static int compile_bind_mounts( |
2755 | const ExecContext *context, | |
2756 | const ExecParameters *params, | |
2757 | BindMount **ret_bind_mounts, | |
da6053d0 | 2758 | size_t *ret_n_bind_mounts, |
6c47cd7d LP |
2759 | char ***ret_empty_directories) { |
2760 | ||
2761 | _cleanup_strv_free_ char **empty_directories = NULL; | |
ed8267c7 | 2762 | BindMount *bind_mounts = NULL; |
5b10116e | 2763 | size_t n, h = 0; |
6c47cd7d LP |
2764 | int r; |
2765 | ||
2766 | assert(context); | |
2767 | assert(params); | |
2768 | assert(ret_bind_mounts); | |
2769 | assert(ret_n_bind_mounts); | |
2770 | assert(ret_empty_directories); | |
2771 | ||
ed8267c7 DT |
2772 | CLEANUP_ARRAY(bind_mounts, h, bind_mount_free_many); |
2773 | ||
6c47cd7d | 2774 | n = context->n_bind_mounts; |
5b10116e | 2775 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) { |
6c47cd7d LP |
2776 | if (!params->prefix[t]) |
2777 | continue; | |
2778 | ||
a2ab603c YW |
2779 | for (size_t i = 0; i < context->directories[t].n_items; i++) |
2780 | n += !context->directories[t].items[i].only_create; | |
6c47cd7d LP |
2781 | } |
2782 | ||
2783 | if (n <= 0) { | |
2784 | *ret_bind_mounts = NULL; | |
2785 | *ret_n_bind_mounts = 0; | |
2786 | *ret_empty_directories = NULL; | |
2787 | return 0; | |
2788 | } | |
2789 | ||
2790 | bind_mounts = new(BindMount, n); | |
2791 | if (!bind_mounts) | |
2792 | return -ENOMEM; | |
2793 | ||
5b10116e | 2794 | for (size_t i = 0; i < context->n_bind_mounts; i++) { |
6c47cd7d | 2795 | BindMount *item = context->bind_mounts + i; |
93404d34 | 2796 | _cleanup_free_ char *s = NULL, *d = NULL; |
6c47cd7d LP |
2797 | |
2798 | s = strdup(item->source); | |
ed8267c7 DT |
2799 | if (!s) |
2800 | return -ENOMEM; | |
6c47cd7d LP |
2801 | |
2802 | d = strdup(item->destination); | |
93404d34 | 2803 | if (!d) |
ed8267c7 | 2804 | return -ENOMEM; |
6c47cd7d LP |
2805 | |
2806 | bind_mounts[h++] = (BindMount) { | |
93404d34 DT |
2807 | .source = TAKE_PTR(s), |
2808 | .destination = TAKE_PTR(d), | |
6c47cd7d LP |
2809 | .read_only = item->read_only, |
2810 | .recursive = item->recursive, | |
2811 | .ignore_enoent = item->ignore_enoent, | |
2812 | }; | |
2813 | } | |
2814 | ||
5b10116e | 2815 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) { |
6c47cd7d LP |
2816 | if (!params->prefix[t]) |
2817 | continue; | |
2818 | ||
211a3d87 | 2819 | if (context->directories[t].n_items == 0) |
6c47cd7d LP |
2820 | continue; |
2821 | ||
494d0247 | 2822 | if (exec_directory_is_private(context, t) && |
74e12520 | 2823 | !exec_context_with_rootfs(context)) { |
6c47cd7d LP |
2824 | char *private_root; |
2825 | ||
2826 | /* So this is for a dynamic user, and we need to make sure the process can access its own | |
2827 | * directory. For that we overmount the usually inaccessible "private" subdirectory with a | |
2828 | * tmpfs that makes it accessible and is empty except for the submounts we do this for. */ | |
2829 | ||
657ee2d8 | 2830 | private_root = path_join(params->prefix[t], "private"); |
ed8267c7 DT |
2831 | if (!private_root) |
2832 | return -ENOMEM; | |
6c47cd7d LP |
2833 | |
2834 | r = strv_consume(&empty_directories, private_root); | |
a635a7ae | 2835 | if (r < 0) |
ed8267c7 | 2836 | return r; |
6c47cd7d LP |
2837 | } |
2838 | ||
211a3d87 | 2839 | for (size_t i = 0; i < context->directories[t].n_items; i++) { |
93404d34 | 2840 | _cleanup_free_ char *s = NULL, *d = NULL; |
6c47cd7d | 2841 | |
a2ab603c YW |
2842 | /* When one of the parent directories is in the list, we cannot create the symlink |
2843 | * for the child directory. See also the comments in setup_exec_directory(). */ | |
2844 | if (context->directories[t].items[i].only_create) | |
2845 | continue; | |
2846 | ||
494d0247 | 2847 | if (exec_directory_is_private(context, t)) |
211a3d87 | 2848 | s = path_join(params->prefix[t], "private", context->directories[t].items[i].path); |
6c47cd7d | 2849 | else |
211a3d87 | 2850 | s = path_join(params->prefix[t], context->directories[t].items[i].path); |
ed8267c7 DT |
2851 | if (!s) |
2852 | return -ENOMEM; | |
6c47cd7d | 2853 | |
494d0247 | 2854 | if (exec_directory_is_private(context, t) && |
74e12520 | 2855 | exec_context_with_rootfs(context)) |
5609f688 YW |
2856 | /* When RootDirectory= or RootImage= are set, then the symbolic link to the private |
2857 | * directory is not created on the root directory. So, let's bind-mount the directory | |
2858 | * on the 'non-private' place. */ | |
211a3d87 | 2859 | d = path_join(params->prefix[t], context->directories[t].items[i].path); |
5609f688 YW |
2860 | else |
2861 | d = strdup(s); | |
93404d34 | 2862 | if (!d) |
ed8267c7 | 2863 | return -ENOMEM; |
6c47cd7d LP |
2864 | |
2865 | bind_mounts[h++] = (BindMount) { | |
93404d34 DT |
2866 | .source = TAKE_PTR(s), |
2867 | .destination = TAKE_PTR(d), | |
6c47cd7d | 2868 | .read_only = false, |
9ce4e4b0 | 2869 | .nosuid = context->dynamic_user, /* don't allow suid/sgid when DynamicUser= is on */ |
6c47cd7d LP |
2870 | .recursive = true, |
2871 | .ignore_enoent = false, | |
2872 | }; | |
2873 | } | |
2874 | } | |
2875 | ||
2876 | assert(h == n); | |
2877 | ||
ed8267c7 | 2878 | *ret_bind_mounts = TAKE_PTR(bind_mounts); |
6c47cd7d | 2879 | *ret_n_bind_mounts = n; |
ae2a15bc | 2880 | *ret_empty_directories = TAKE_PTR(empty_directories); |
6c47cd7d LP |
2881 | |
2882 | return (int) n; | |
6c47cd7d LP |
2883 | } |
2884 | ||
df61e79a LB |
2885 | /* ret_symlinks will contain a list of pairs src:dest that describes |
2886 | * the symlinks to create later on. For example, the symlinks needed | |
2887 | * to safely give private directories to DynamicUser=1 users. */ | |
2888 | static int compile_symlinks( | |
2889 | const ExecContext *context, | |
2890 | const ExecParameters *params, | |
663e2756 | 2891 | bool setup_os_release_symlink, |
df61e79a LB |
2892 | char ***ret_symlinks) { |
2893 | ||
2894 | _cleanup_strv_free_ char **symlinks = NULL; | |
2895 | int r; | |
2896 | ||
2897 | assert(context); | |
2898 | assert(params); | |
2899 | assert(ret_symlinks); | |
2900 | ||
2901 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { | |
211a3d87 LB |
2902 | for (size_t i = 0; i < context->directories[dt].n_items; i++) { |
2903 | _cleanup_free_ char *private_path = NULL, *path = NULL; | |
df61e79a | 2904 | |
211a3d87 LB |
2905 | STRV_FOREACH(symlink, context->directories[dt].items[i].symlinks) { |
2906 | _cleanup_free_ char *src_abs = NULL, *dst_abs = NULL; | |
df61e79a | 2907 | |
211a3d87 LB |
2908 | src_abs = path_join(params->prefix[dt], context->directories[dt].items[i].path); |
2909 | dst_abs = path_join(params->prefix[dt], *symlink); | |
2910 | if (!src_abs || !dst_abs) | |
2911 | return -ENOMEM; | |
df61e79a | 2912 | |
211a3d87 LB |
2913 | r = strv_consume_pair(&symlinks, TAKE_PTR(src_abs), TAKE_PTR(dst_abs)); |
2914 | if (r < 0) | |
2915 | return r; | |
2916 | } | |
2917 | ||
a2ab603c YW |
2918 | if (!exec_directory_is_private(context, dt) || |
2919 | exec_context_with_rootfs(context) || | |
2920 | context->directories[dt].items[i].only_create) | |
211a3d87 LB |
2921 | continue; |
2922 | ||
2923 | private_path = path_join(params->prefix[dt], "private", context->directories[dt].items[i].path); | |
df61e79a LB |
2924 | if (!private_path) |
2925 | return -ENOMEM; | |
2926 | ||
211a3d87 | 2927 | path = path_join(params->prefix[dt], context->directories[dt].items[i].path); |
df61e79a LB |
2928 | if (!path) |
2929 | return -ENOMEM; | |
2930 | ||
2931 | r = strv_consume_pair(&symlinks, TAKE_PTR(private_path), TAKE_PTR(path)); | |
2932 | if (r < 0) | |
2933 | return r; | |
2934 | } | |
2935 | } | |
2936 | ||
663e2756 LB |
2937 | /* We make the host's os-release available via a symlink, so that we can copy it atomically |
2938 | * and readers will never get a half-written version. Note that, while the paths specified here are | |
2939 | * absolute, when they are processed in namespace.c they will be made relative automatically, i.e.: | |
2940 | * 'os-release -> .os-release-stage/os-release' is what will be created. */ | |
2941 | if (setup_os_release_symlink) { | |
2942 | r = strv_extend(&symlinks, "/run/host/.os-release-stage/os-release"); | |
2943 | if (r < 0) | |
2944 | return r; | |
2945 | ||
2946 | r = strv_extend(&symlinks, "/run/host/os-release"); | |
2947 | if (r < 0) | |
2948 | return r; | |
2949 | } | |
2950 | ||
df61e79a LB |
2951 | *ret_symlinks = TAKE_PTR(symlinks); |
2952 | ||
2953 | return 0; | |
2954 | } | |
2955 | ||
4e677599 LP |
2956 | static bool insist_on_sandboxing( |
2957 | const ExecContext *context, | |
2958 | const char *root_dir, | |
2959 | const char *root_image, | |
2960 | const BindMount *bind_mounts, | |
2961 | size_t n_bind_mounts) { | |
2962 | ||
4e677599 LP |
2963 | assert(context); |
2964 | assert(n_bind_mounts == 0 || bind_mounts); | |
2965 | ||
2966 | /* Checks whether we need to insist on fs namespacing. i.e. whether we have settings configured that | |
86b52a39 | 2967 | * would alter the view on the file system beyond making things read-only or invisible, i.e. would |
4e677599 LP |
2968 | * rearrange stuff in a way we cannot ignore gracefully. */ |
2969 | ||
2970 | if (context->n_temporary_filesystems > 0) | |
2971 | return true; | |
2972 | ||
2973 | if (root_dir || root_image) | |
2974 | return true; | |
2975 | ||
b3d13314 LB |
2976 | if (context->n_mount_images > 0) |
2977 | return true; | |
2978 | ||
4e677599 LP |
2979 | if (context->dynamic_user) |
2980 | return true; | |
2981 | ||
4355c04f LB |
2982 | if (context->n_extension_images > 0 || !strv_isempty(context->extension_directories)) |
2983 | return true; | |
2984 | ||
4e677599 LP |
2985 | /* If there are any bind mounts set that don't map back onto themselves, fs namespacing becomes |
2986 | * essential. */ | |
5b10116e | 2987 | for (size_t i = 0; i < n_bind_mounts; i++) |
4e677599 LP |
2988 | if (!path_equal(bind_mounts[i].source, bind_mounts[i].destination)) |
2989 | return true; | |
2990 | ||
91dd5f7c LP |
2991 | if (context->log_namespace) |
2992 | return true; | |
2993 | ||
4e677599 LP |
2994 | return false; |
2995 | } | |
2996 | ||
9c0c6701 DDM |
2997 | static int setup_ephemeral(const ExecContext *context, ExecRuntime *runtime) { |
2998 | _cleanup_close_ int fd = -EBADF; | |
2999 | int r; | |
3000 | ||
3001 | if (!runtime || !runtime->ephemeral_copy) | |
3002 | return 0; | |
3003 | ||
3004 | r = posix_lock(runtime->ephemeral_storage_socket[0], LOCK_EX); | |
3005 | if (r < 0) | |
3006 | return log_debug_errno(r, "Failed to lock ephemeral storage socket: %m"); | |
3007 | ||
3008 | CLEANUP_POSIX_UNLOCK(runtime->ephemeral_storage_socket[0]); | |
3009 | ||
3010 | fd = receive_one_fd(runtime->ephemeral_storage_socket[0], MSG_PEEK|MSG_DONTWAIT); | |
3011 | if (fd >= 0) | |
3012 | /* We got an fd! That means ephemeral has already been set up, so nothing to do here. */ | |
3013 | return 0; | |
3014 | ||
3015 | if (fd != -EAGAIN) | |
3016 | return log_debug_errno(fd, "Failed to receive file descriptor queued on ephemeral storage socket: %m"); | |
3017 | ||
3018 | log_debug("Making ephemeral snapshot of %s to %s", | |
3019 | context->root_image ?: context->root_directory, runtime->ephemeral_copy); | |
3020 | ||
3021 | if (context->root_image) | |
3022 | fd = copy_file(context->root_image, runtime->ephemeral_copy, O_EXCL, 0600, | |
3023 | COPY_LOCK_BSD|COPY_REFLINK|COPY_CRTIME); | |
3024 | else | |
3025 | fd = btrfs_subvol_snapshot_at(AT_FDCWD, context->root_directory, | |
3026 | AT_FDCWD, runtime->ephemeral_copy, | |
3027 | BTRFS_SNAPSHOT_FALLBACK_COPY | | |
3028 | BTRFS_SNAPSHOT_FALLBACK_DIRECTORY | | |
3029 | BTRFS_SNAPSHOT_RECURSIVE | | |
3030 | BTRFS_SNAPSHOT_LOCK_BSD); | |
3031 | if (fd < 0) | |
3032 | return log_debug_errno(fd, "Failed to snapshot %s to %s: %m", | |
3033 | context->root_image ?: context->root_directory, runtime->ephemeral_copy); | |
3034 | ||
3035 | if (context->root_image) { | |
3036 | /* A root image might be subject to lots of random writes so let's try to disable COW on it | |
3037 | * which tends to not perform well in combination with lots of random writes. | |
3038 | * | |
3039 | * Note: btrfs actually isn't impressed by us setting the flag after making the reflink'ed | |
3040 | * copy, but we at least want to make the intention clear. | |
3041 | */ | |
3042 | r = chattr_fd(fd, FS_NOCOW_FL, FS_NOCOW_FL, NULL); | |
3043 | if (r < 0) | |
3044 | log_debug_errno(fd, "Failed to disable copy-on-write for %s, ignoring: %m", runtime->ephemeral_copy); | |
3045 | } | |
3046 | ||
3047 | r = send_one_fd(runtime->ephemeral_storage_socket[1], fd, MSG_DONTWAIT); | |
3048 | if (r < 0) | |
3049 | return log_debug_errno(r, "Failed to queue file descriptor on ephemeral storage socket: %m"); | |
3050 | ||
3051 | return 1; | |
3052 | } | |
3053 | ||
66130f0a DDM |
3054 | static int verity_settings_prepare( |
3055 | VeritySettings *verity, | |
3056 | const char *root_image, | |
3057 | const void *root_hash, | |
3058 | size_t root_hash_size, | |
3059 | const char *root_hash_path, | |
3060 | const void *root_hash_sig, | |
3061 | size_t root_hash_sig_size, | |
3062 | const char *root_hash_sig_path, | |
3063 | const char *verity_data_path) { | |
3064 | ||
3065 | int r; | |
3066 | ||
3067 | assert(verity); | |
3068 | ||
3069 | if (root_hash) { | |
3070 | void *d; | |
3071 | ||
3072 | d = memdup(root_hash, root_hash_size); | |
3073 | if (!d) | |
3074 | return -ENOMEM; | |
3075 | ||
3076 | free_and_replace(verity->root_hash, d); | |
3077 | verity->root_hash_size = root_hash_size; | |
3078 | verity->designator = PARTITION_ROOT; | |
3079 | } | |
3080 | ||
3081 | if (root_hash_sig) { | |
3082 | void *d; | |
3083 | ||
3084 | d = memdup(root_hash_sig, root_hash_sig_size); | |
3085 | if (!d) | |
3086 | return -ENOMEM; | |
3087 | ||
3088 | free_and_replace(verity->root_hash_sig, d); | |
3089 | verity->root_hash_sig_size = root_hash_sig_size; | |
3090 | verity->designator = PARTITION_ROOT; | |
3091 | } | |
3092 | ||
3093 | if (verity_data_path) { | |
3094 | r = free_and_strdup(&verity->data_path, verity_data_path); | |
3095 | if (r < 0) | |
3096 | return r; | |
3097 | } | |
3098 | ||
3099 | r = verity_settings_load( | |
3100 | verity, | |
3101 | root_image, | |
3102 | root_hash_path, | |
3103 | root_hash_sig_path); | |
3104 | if (r < 0) | |
3105 | return log_debug_errno(r, "Failed to load root hash: %m"); | |
3106 | ||
3107 | return 0; | |
3108 | } | |
3109 | ||
6818c54c | 3110 | static int apply_mount_namespace( |
34cf6c43 | 3111 | const Unit *u, |
9f71ba8d | 3112 | ExecCommandFlags command_flags, |
6818c54c LP |
3113 | const ExecContext *context, |
3114 | const ExecParameters *params, | |
9c0c6701 | 3115 | ExecRuntime *runtime, |
d4b6ec98 | 3116 | const char *memory_pressure_path, |
7cc5ef5f | 3117 | char **error_path) { |
6818c54c | 3118 | |
66130f0a | 3119 | _cleanup_(verity_settings_done) VeritySettings verity = VERITY_SETTINGS_DEFAULT; |
d4b6ec98 LB |
3120 | _cleanup_strv_free_ char **empty_directories = NULL, **symlinks = NULL, |
3121 | **read_write_paths_cleanup = NULL; | |
73ff4d48 | 3122 | _cleanup_free_ char *creds_path = NULL, *incoming_dir = NULL, *propagate_dir = NULL, |
663e2756 | 3123 | *extension_dir = NULL, *host_os_release_stage = NULL; |
66130f0a | 3124 | const char *root_dir = NULL, *root_image = NULL, *tmp_dir = NULL, *var_tmp_dir = NULL; |
d4b6ec98 | 3125 | char **read_write_paths; |
228af36f | 3126 | NamespaceInfo ns_info; |
663e2756 | 3127 | bool needs_sandboxing, setup_os_release_symlink; |
6c47cd7d | 3128 | BindMount *bind_mounts = NULL; |
da6053d0 | 3129 | size_t n_bind_mounts = 0; |
6818c54c | 3130 | int r; |
93c6bb51 | 3131 | |
2b3c1b9e DH |
3132 | assert(context); |
3133 | ||
29933daf DT |
3134 | CLEANUP_ARRAY(bind_mounts, n_bind_mounts, bind_mount_free_many); |
3135 | ||
915e6d16 | 3136 | if (params->flags & EXEC_APPLY_CHROOT) { |
9c0c6701 DDM |
3137 | r = setup_ephemeral(context, runtime); |
3138 | if (r < 0) | |
3139 | return r; | |
915e6d16 | 3140 | |
9c0c6701 DDM |
3141 | if (context->root_image) |
3142 | root_image = (runtime ? runtime->ephemeral_copy : NULL) ?: context->root_image; | |
3143 | else | |
3144 | root_dir = (runtime ? runtime->ephemeral_copy : NULL) ?: context->root_directory; | |
915e6d16 | 3145 | } |
93c6bb51 | 3146 | |
6c47cd7d LP |
3147 | r = compile_bind_mounts(context, params, &bind_mounts, &n_bind_mounts, &empty_directories); |
3148 | if (r < 0) | |
3149 | return r; | |
3150 | ||
d4b6ec98 LB |
3151 | /* We need to make the pressure path writable even if /sys/fs/cgroups is made read-only, as the |
3152 | * service will need to write to it in order to start the notifications. */ | |
3153 | if (context->protect_control_groups && memory_pressure_path && !streq(memory_pressure_path, "/dev/null")) { | |
3154 | read_write_paths_cleanup = strv_copy(context->read_write_paths); | |
29933daf DT |
3155 | if (!read_write_paths_cleanup) |
3156 | return -ENOMEM; | |
d4b6ec98 LB |
3157 | |
3158 | r = strv_extend(&read_write_paths_cleanup, memory_pressure_path); | |
3159 | if (r < 0) | |
29933daf | 3160 | return r; |
d4b6ec98 LB |
3161 | |
3162 | read_write_paths = read_write_paths_cleanup; | |
3163 | } else | |
3164 | read_write_paths = context->read_write_paths; | |
3165 | ||
9f71ba8d | 3166 | needs_sandboxing = (params->flags & EXEC_APPLY_SANDBOXING) && !(command_flags & EXEC_COMMAND_FULLY_PRIVILEGED); |
ecf63c91 NJ |
3167 | if (needs_sandboxing) { |
3168 | /* The runtime struct only contains the parent of the private /tmp, | |
3169 | * which is non-accessible to world users. Inside of it there's a /tmp | |
56a13a49 ZJS |
3170 | * that is sticky, and that's the one we want to use here. |
3171 | * This does not apply when we are using /run/systemd/empty as fallback. */ | |
ecf63c91 | 3172 | |
28135da3 DDM |
3173 | if (context->private_tmp && runtime && runtime->shared) { |
3174 | if (streq_ptr(runtime->shared->tmp_dir, RUN_SYSTEMD_EMPTY)) | |
3175 | tmp_dir = runtime->shared->tmp_dir; | |
3176 | else if (runtime->shared->tmp_dir) | |
3177 | tmp_dir = strjoina(runtime->shared->tmp_dir, "/tmp"); | |
56a13a49 | 3178 | |
28135da3 DDM |
3179 | if (streq_ptr(runtime->shared->var_tmp_dir, RUN_SYSTEMD_EMPTY)) |
3180 | var_tmp_dir = runtime->shared->var_tmp_dir; | |
3181 | else if (runtime->shared->var_tmp_dir) | |
3182 | var_tmp_dir = strjoina(runtime->shared->var_tmp_dir, "/tmp"); | |
ecf63c91 NJ |
3183 | } |
3184 | ||
b5a33299 YW |
3185 | ns_info = (NamespaceInfo) { |
3186 | .ignore_protect_paths = false, | |
3187 | .private_dev = context->private_devices, | |
3188 | .protect_control_groups = context->protect_control_groups, | |
3189 | .protect_kernel_tunables = context->protect_kernel_tunables, | |
3190 | .protect_kernel_modules = context->protect_kernel_modules, | |
94a7b275 | 3191 | .protect_kernel_logs = context->protect_kernel_logs, |
aecd5ac6 | 3192 | .protect_hostname = context->protect_hostname, |
5e98086d | 3193 | .mount_apivfs = exec_context_get_effective_mount_apivfs(context), |
52b3d652 LP |
3194 | .protect_home = context->protect_home, |
3195 | .protect_system = context->protect_system, | |
4e399953 LP |
3196 | .protect_proc = context->protect_proc, |
3197 | .proc_subset = context->proc_subset, | |
c2da3bf2 | 3198 | .private_network = exec_needs_network_namespace(context), |
fde36d25 | 3199 | .private_ipc = exec_needs_ipc_namespace(context), |
6720e356 | 3200 | /* If NNP is on, we can turn on MS_NOSUID, since it won't have any effect anymore. */ |
5181630f | 3201 | .mount_nosuid = context->no_new_privileges && !mac_selinux_use(), |
b5a33299 | 3202 | }; |
ecf63c91 | 3203 | } else if (!context->dynamic_user && root_dir) |
228af36f LP |
3204 | /* |
3205 | * If DynamicUser=no and RootDirectory= is set then lets pass a relaxed | |
3206 | * sandbox info, otherwise enforce it, don't ignore protected paths and | |
3207 | * fail if we are enable to apply the sandbox inside the mount namespace. | |
3208 | */ | |
3209 | ns_info = (NamespaceInfo) { | |
3210 | .ignore_protect_paths = true, | |
3211 | }; | |
3212 | else | |
3213 | ns_info = (NamespaceInfo) {}; | |
b5a33299 | 3214 | |
663e2756 LB |
3215 | /* Symlinks (exec dirs, os-release) are set up after other mounts, before they are made read-only. */ |
3216 | setup_os_release_symlink = ns_info.mount_apivfs && (root_dir || root_image); | |
3217 | r = compile_symlinks(context, params, setup_os_release_symlink, &symlinks); | |
3218 | if (r < 0) | |
3219 | return r; | |
3220 | ||
874cdcbc | 3221 | if (context->mount_propagation_flag == MS_SHARED) |
37ed15d7 FB |
3222 | log_unit_debug(u, "shared mount propagation hidden by other fs namespacing unit settings: ignoring"); |
3223 | ||
133e4de2 YW |
3224 | if (FLAGS_SET(params->flags, EXEC_WRITE_CREDENTIALS)) { |
3225 | r = exec_context_get_credential_directory(context, params, u->id, &creds_path); | |
3226 | if (r < 0) | |
3227 | return r; | |
73ff4d48 YW |
3228 | } |
3229 | ||
170d978b | 3230 | if (params->runtime_scope == RUNTIME_SCOPE_SYSTEM) { |
5e8deb94 | 3231 | propagate_dir = path_join("/run/systemd/propagate/", u->id); |
29933daf DT |
3232 | if (!propagate_dir) |
3233 | return -ENOMEM; | |
f2550b98 | 3234 | |
5e8deb94 | 3235 | incoming_dir = strdup("/run/systemd/incoming"); |
29933daf DT |
3236 | if (!incoming_dir) |
3237 | return -ENOMEM; | |
24759d8f LB |
3238 | |
3239 | extension_dir = strdup("/run/systemd/unit-extensions"); | |
29933daf DT |
3240 | if (!extension_dir) |
3241 | return -ENOMEM; | |
3f37a825 LB |
3242 | |
3243 | /* If running under a different root filesystem, propagate the host's os-release. We make a | |
3244 | * copy rather than just bind mounting it, so that it can be updated on soft-reboot. */ | |
663e2756 LB |
3245 | if (setup_os_release_symlink) { |
3246 | host_os_release_stage = strdup("/run/systemd/propagate/.os-release-stage"); | |
3247 | if (!host_os_release_stage) | |
3f37a825 LB |
3248 | return -ENOMEM; |
3249 | } | |
170d978b LP |
3250 | } else { |
3251 | assert(params->runtime_scope == RUNTIME_SCOPE_USER); | |
3252 | ||
29933daf DT |
3253 | if (asprintf(&extension_dir, "/run/user/" UID_FMT "/systemd/unit-extensions", geteuid()) < 0) |
3254 | return -ENOMEM; | |
3f37a825 | 3255 | |
663e2756 LB |
3256 | if (setup_os_release_symlink) { |
3257 | if (asprintf(&host_os_release_stage, | |
3258 | "/run/user/" UID_FMT "/systemd/propagate/.os-release-stage", | |
3259 | geteuid()) < 0) | |
3f37a825 LB |
3260 | return -ENOMEM; |
3261 | } | |
170d978b | 3262 | } |
5e8deb94 | 3263 | |
66130f0a DDM |
3264 | if (root_image) { |
3265 | r = verity_settings_prepare( | |
3266 | &verity, | |
3267 | root_image, | |
3268 | context->root_hash, context->root_hash_size, context->root_hash_path, | |
3269 | context->root_hash_sig, context->root_hash_sig_size, context->root_hash_sig_path, | |
3270 | context->root_verity); | |
3271 | if (r < 0) | |
3272 | return r; | |
3273 | } | |
3274 | ||
84be0c71 LP |
3275 | r = setup_namespace( |
3276 | root_dir, | |
3277 | root_image, | |
3278 | context->root_image_options, | |
3279 | context->root_image_policy ?: &image_policy_service, | |
3280 | &ns_info, | |
3281 | read_write_paths, | |
3282 | needs_sandboxing ? context->read_only_paths : NULL, | |
3283 | needs_sandboxing ? context->inaccessible_paths : NULL, | |
3284 | needs_sandboxing ? context->exec_paths : NULL, | |
3285 | needs_sandboxing ? context->no_exec_paths : NULL, | |
3286 | empty_directories, | |
3287 | symlinks, | |
3288 | bind_mounts, | |
3289 | n_bind_mounts, | |
3290 | context->temporary_filesystems, | |
3291 | context->n_temporary_filesystems, | |
3292 | context->mount_images, | |
3293 | context->n_mount_images, | |
3294 | context->mount_image_policy ?: &image_policy_service, | |
3295 | tmp_dir, | |
3296 | var_tmp_dir, | |
3297 | creds_path, | |
3298 | context->log_namespace, | |
3299 | context->mount_propagation_flag, | |
66130f0a | 3300 | &verity, |
84be0c71 LP |
3301 | context->extension_images, |
3302 | context->n_extension_images, | |
3303 | context->extension_image_policy ?: &image_policy_sysext, | |
3304 | context->extension_directories, | |
3305 | propagate_dir, | |
3306 | incoming_dir, | |
3307 | extension_dir, | |
3308 | root_dir || root_image ? params->notify_socket : NULL, | |
663e2756 | 3309 | host_os_release_stage, |
84be0c71 | 3310 | error_path); |
93c6bb51 | 3311 | |
1beab8b0 | 3312 | /* If we couldn't set up the namespace this is probably due to a missing capability. setup_namespace() reports |
5238e957 | 3313 | * that with a special, recognizable error ENOANO. In this case, silently proceed, but only if exclusively |
1beab8b0 LP |
3314 | * sandboxing options were used, i.e. nothing such as RootDirectory= or BindMount= that would result in a |
3315 | * completely different execution environment. */ | |
aca835ed | 3316 | if (r == -ENOANO) { |
4e677599 LP |
3317 | if (insist_on_sandboxing( |
3318 | context, | |
3319 | root_dir, root_image, | |
3320 | bind_mounts, | |
29933daf DT |
3321 | n_bind_mounts)) |
3322 | return log_unit_debug_errno(u, | |
3323 | SYNTHETIC_ERRNO(EOPNOTSUPP), | |
3324 | "Failed to set up namespace, and refusing to continue since " | |
3325 | "the selected namespacing options alter mount environment non-trivially.\n" | |
3326 | "Bind mounts: %zu, temporary filesystems: %zu, root directory: %s, root image: %s, dynamic user: %s", | |
3327 | n_bind_mounts, | |
3328 | context->n_temporary_filesystems, | |
3329 | yes_no(root_dir), | |
3330 | yes_no(root_image), | |
3331 | yes_no(context->dynamic_user)); | |
3332 | ||
3333 | log_unit_debug(u, "Failed to set up namespace, assuming containerized execution and ignoring."); | |
3334 | return 0; | |
93c6bb51 DH |
3335 | } |
3336 | ||
3337 | return r; | |
3338 | } | |
3339 | ||
915e6d16 LP |
3340 | static int apply_working_directory( |
3341 | const ExecContext *context, | |
3342 | const ExecParameters *params, | |
9c0c6701 | 3343 | ExecRuntime *runtime, |
915e6d16 | 3344 | const char *home, |
376fecf6 | 3345 | int *exit_status) { |
915e6d16 | 3346 | |
6732edab | 3347 | const char *d, *wd; |
2b3c1b9e DH |
3348 | |
3349 | assert(context); | |
376fecf6 | 3350 | assert(exit_status); |
2b3c1b9e | 3351 | |
6732edab LP |
3352 | if (context->working_directory_home) { |
3353 | ||
376fecf6 LP |
3354 | if (!home) { |
3355 | *exit_status = EXIT_CHDIR; | |
6732edab | 3356 | return -ENXIO; |
376fecf6 | 3357 | } |
6732edab | 3358 | |
2b3c1b9e | 3359 | wd = home; |
6732edab | 3360 | |
14eb3285 LP |
3361 | } else |
3362 | wd = empty_to_root(context->working_directory); | |
e7f1e7c6 | 3363 | |
fa97f630 | 3364 | if (params->flags & EXEC_APPLY_CHROOT) |
2b3c1b9e | 3365 | d = wd; |
fa97f630 | 3366 | else |
9c0c6701 | 3367 | d = prefix_roota((runtime ? runtime->ephemeral_copy : NULL) ?: context->root_directory, wd); |
e7f1e7c6 | 3368 | |
376fecf6 LP |
3369 | if (chdir(d) < 0 && !context->working_directory_missing_ok) { |
3370 | *exit_status = EXIT_CHDIR; | |
2b3c1b9e | 3371 | return -errno; |
376fecf6 | 3372 | } |
e7f1e7c6 DH |
3373 | |
3374 | return 0; | |
3375 | } | |
3376 | ||
fa97f630 JB |
3377 | static int apply_root_directory( |
3378 | const ExecContext *context, | |
3379 | const ExecParameters *params, | |
9c0c6701 | 3380 | ExecRuntime *runtime, |
fa97f630 JB |
3381 | const bool needs_mount_ns, |
3382 | int *exit_status) { | |
3383 | ||
3384 | assert(context); | |
3385 | assert(exit_status); | |
3386 | ||
5b10116e | 3387 | if (params->flags & EXEC_APPLY_CHROOT) |
fa97f630 | 3388 | if (!needs_mount_ns && context->root_directory) |
9c0c6701 | 3389 | if (chroot((runtime ? runtime->ephemeral_copy : NULL) ?: context->root_directory) < 0) { |
fa97f630 JB |
3390 | *exit_status = EXIT_CHROOT; |
3391 | return -errno; | |
3392 | } | |
fa97f630 JB |
3393 | |
3394 | return 0; | |
3395 | } | |
3396 | ||
b1edf445 | 3397 | static int setup_keyring( |
34cf6c43 | 3398 | const Unit *u, |
b1edf445 LP |
3399 | const ExecContext *context, |
3400 | const ExecParameters *p, | |
3401 | uid_t uid, gid_t gid) { | |
3402 | ||
74dd6b51 | 3403 | key_serial_t keyring; |
e64c2d0b DJL |
3404 | int r = 0; |
3405 | uid_t saved_uid; | |
3406 | gid_t saved_gid; | |
74dd6b51 LP |
3407 | |
3408 | assert(u); | |
b1edf445 | 3409 | assert(context); |
74dd6b51 LP |
3410 | assert(p); |
3411 | ||
3412 | /* Let's set up a new per-service "session" kernel keyring for each system service. This has the benefit that | |
3413 | * each service runs with its own keyring shared among all processes of the service, but with no hook-up beyond | |
3414 | * that scope, and in particular no link to the per-UID keyring. If we don't do this the keyring will be | |
3415 | * automatically created on-demand and then linked to the per-UID keyring, by the kernel. The kernel's built-in | |
3416 | * on-demand behaviour is very appropriate for login users, but probably not so much for system services, where | |
3417 | * UIDs are not necessarily specific to a service but reused (at least in the case of UID 0). */ | |
3418 | ||
b1edf445 LP |
3419 | if (context->keyring_mode == EXEC_KEYRING_INHERIT) |
3420 | return 0; | |
3421 | ||
e64c2d0b DJL |
3422 | /* Acquiring a reference to the user keyring is nasty. We briefly change identity in order to get things set up |
3423 | * properly by the kernel. If we don't do that then we can't create it atomically, and that sucks for parallel | |
3424 | * execution. This mimics what pam_keyinit does, too. Setting up session keyring, to be owned by the right user | |
3425 | * & group is just as nasty as acquiring a reference to the user keyring. */ | |
3426 | ||
3427 | saved_uid = getuid(); | |
3428 | saved_gid = getgid(); | |
3429 | ||
3430 | if (gid_is_valid(gid) && gid != saved_gid) { | |
3431 | if (setregid(gid, -1) < 0) | |
3432 | return log_unit_error_errno(u, errno, "Failed to change GID for user keyring: %m"); | |
3433 | } | |
3434 | ||
3435 | if (uid_is_valid(uid) && uid != saved_uid) { | |
3436 | if (setreuid(uid, -1) < 0) { | |
3437 | r = log_unit_error_errno(u, errno, "Failed to change UID for user keyring: %m"); | |
3438 | goto out; | |
3439 | } | |
3440 | } | |
3441 | ||
74dd6b51 LP |
3442 | keyring = keyctl(KEYCTL_JOIN_SESSION_KEYRING, 0, 0, 0, 0); |
3443 | if (keyring == -1) { | |
3444 | if (errno == ENOSYS) | |
8002fb97 | 3445 | log_unit_debug_errno(u, errno, "Kernel keyring not supported, ignoring."); |
065b4774 | 3446 | else if (ERRNO_IS_PRIVILEGE(errno)) |
8002fb97 | 3447 | log_unit_debug_errno(u, errno, "Kernel keyring access prohibited, ignoring."); |
74dd6b51 | 3448 | else if (errno == EDQUOT) |
8002fb97 | 3449 | log_unit_debug_errno(u, errno, "Out of kernel keyrings to allocate, ignoring."); |
74dd6b51 | 3450 | else |
e64c2d0b | 3451 | r = log_unit_error_errno(u, errno, "Setting up kernel keyring failed: %m"); |
74dd6b51 | 3452 | |
e64c2d0b | 3453 | goto out; |
74dd6b51 LP |
3454 | } |
3455 | ||
e64c2d0b DJL |
3456 | /* When requested link the user keyring into the session keyring. */ |
3457 | if (context->keyring_mode == EXEC_KEYRING_SHARED) { | |
3458 | ||
3459 | if (keyctl(KEYCTL_LINK, | |
3460 | KEY_SPEC_USER_KEYRING, | |
3461 | KEY_SPEC_SESSION_KEYRING, 0, 0) < 0) { | |
3462 | r = log_unit_error_errno(u, errno, "Failed to link user keyring into session keyring: %m"); | |
3463 | goto out; | |
3464 | } | |
3465 | } | |
3466 | ||
3467 | /* Restore uid/gid back */ | |
3468 | if (uid_is_valid(uid) && uid != saved_uid) { | |
3469 | if (setreuid(saved_uid, -1) < 0) { | |
3470 | r = log_unit_error_errno(u, errno, "Failed to change UID back for user keyring: %m"); | |
3471 | goto out; | |
3472 | } | |
3473 | } | |
3474 | ||
3475 | if (gid_is_valid(gid) && gid != saved_gid) { | |
3476 | if (setregid(saved_gid, -1) < 0) | |
3477 | return log_unit_error_errno(u, errno, "Failed to change GID back for user keyring: %m"); | |
3478 | } | |
3479 | ||
3480 | /* Populate they keyring with the invocation ID by default, as original saved_uid. */ | |
b3415f5d LP |
3481 | if (!sd_id128_is_null(u->invocation_id)) { |
3482 | key_serial_t key; | |
3483 | ||
3484 | key = add_key("user", "invocation_id", &u->invocation_id, sizeof(u->invocation_id), KEY_SPEC_SESSION_KEYRING); | |
3485 | if (key == -1) | |
8002fb97 | 3486 | log_unit_debug_errno(u, errno, "Failed to add invocation ID to keyring, ignoring: %m"); |
b3415f5d LP |
3487 | else { |
3488 | if (keyctl(KEYCTL_SETPERM, key, | |
3489 | KEY_POS_VIEW|KEY_POS_READ|KEY_POS_SEARCH| | |
3490 | KEY_USR_VIEW|KEY_USR_READ|KEY_USR_SEARCH, 0, 0) < 0) | |
e64c2d0b | 3491 | r = log_unit_error_errno(u, errno, "Failed to restrict invocation ID permission: %m"); |
b3415f5d LP |
3492 | } |
3493 | } | |
3494 | ||
e64c2d0b | 3495 | out: |
37b22b3b | 3496 | /* Revert back uid & gid for the last time, and exit */ |
e64c2d0b DJL |
3497 | /* no extra logging, as only the first already reported error matters */ |
3498 | if (getuid() != saved_uid) | |
3499 | (void) setreuid(saved_uid, -1); | |
b1edf445 | 3500 | |
e64c2d0b DJL |
3501 | if (getgid() != saved_gid) |
3502 | (void) setregid(saved_gid, -1); | |
b1edf445 | 3503 | |
e64c2d0b | 3504 | return r; |
74dd6b51 LP |
3505 | } |
3506 | ||
3042bbeb | 3507 | static void append_socket_pair(int *array, size_t *n, const int pair[static 2]) { |
29206d46 LP |
3508 | assert(array); |
3509 | assert(n); | |
2caa38e9 | 3510 | assert(pair); |
29206d46 LP |
3511 | |
3512 | if (pair[0] >= 0) | |
3513 | array[(*n)++] = pair[0]; | |
3514 | if (pair[1] >= 0) | |
3515 | array[(*n)++] = pair[1]; | |
3516 | } | |
3517 | ||
a34ceba6 LP |
3518 | static int close_remaining_fds( |
3519 | const ExecParameters *params, | |
28135da3 | 3520 | const ExecRuntime *runtime, |
00d9ef85 | 3521 | int user_lookup_fd, |
a34ceba6 | 3522 | int socket_fd, |
5b8d1f6b | 3523 | const int *fds, size_t n_fds) { |
a34ceba6 | 3524 | |
da6053d0 | 3525 | size_t n_dont_close = 0; |
9c0c6701 | 3526 | int dont_close[n_fds + 14]; |
a34ceba6 LP |
3527 | |
3528 | assert(params); | |
3529 | ||
3530 | if (params->stdin_fd >= 0) | |
3531 | dont_close[n_dont_close++] = params->stdin_fd; | |
3532 | if (params->stdout_fd >= 0) | |
3533 | dont_close[n_dont_close++] = params->stdout_fd; | |
3534 | if (params->stderr_fd >= 0) | |
3535 | dont_close[n_dont_close++] = params->stderr_fd; | |
3536 | ||
3537 | if (socket_fd >= 0) | |
3538 | dont_close[n_dont_close++] = socket_fd; | |
3539 | if (n_fds > 0) { | |
3540 | memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds); | |
3541 | n_dont_close += n_fds; | |
3542 | } | |
3543 | ||
9c0c6701 DDM |
3544 | if (runtime) |
3545 | append_socket_pair(dont_close, &n_dont_close, runtime->ephemeral_storage_socket); | |
3546 | ||
28135da3 DDM |
3547 | if (runtime && runtime->shared) { |
3548 | append_socket_pair(dont_close, &n_dont_close, runtime->shared->netns_storage_socket); | |
3549 | append_socket_pair(dont_close, &n_dont_close, runtime->shared->ipcns_storage_socket); | |
a70581ff | 3550 | } |
29206d46 | 3551 | |
15220772 DDM |
3552 | if (runtime && runtime->dynamic_creds) { |
3553 | if (runtime->dynamic_creds->user) | |
3554 | append_socket_pair(dont_close, &n_dont_close, runtime->dynamic_creds->user->storage_socket); | |
3555 | if (runtime->dynamic_creds->group) | |
3556 | append_socket_pair(dont_close, &n_dont_close, runtime->dynamic_creds->group->storage_socket); | |
a34ceba6 LP |
3557 | } |
3558 | ||
00d9ef85 LP |
3559 | if (user_lookup_fd >= 0) |
3560 | dont_close[n_dont_close++] = user_lookup_fd; | |
3561 | ||
a34ceba6 LP |
3562 | return close_all_fds(dont_close, n_dont_close); |
3563 | } | |
3564 | ||
00d9ef85 LP |
3565 | static int send_user_lookup( |
3566 | Unit *unit, | |
3567 | int user_lookup_fd, | |
3568 | uid_t uid, | |
3569 | gid_t gid) { | |
3570 | ||
3571 | assert(unit); | |
3572 | ||
3573 | /* Send the resolved UID/GID to PID 1 after we learnt it. We send a single datagram, containing the UID/GID | |
3574 | * data as well as the unit name. Note that we suppress sending this if no user/group to resolve was | |
3575 | * specified. */ | |
3576 | ||
3577 | if (user_lookup_fd < 0) | |
3578 | return 0; | |
3579 | ||
3580 | if (!uid_is_valid(uid) && !gid_is_valid(gid)) | |
3581 | return 0; | |
3582 | ||
3583 | if (writev(user_lookup_fd, | |
3584 | (struct iovec[]) { | |
ce16d177 YW |
3585 | IOVEC_MAKE(&uid, sizeof(uid)), |
3586 | IOVEC_MAKE(&gid, sizeof(gid)), | |
3587 | IOVEC_MAKE_STRING(unit->id) }, 3) < 0) | |
00d9ef85 LP |
3588 | return -errno; |
3589 | ||
3590 | return 0; | |
3591 | } | |
3592 | ||
6732edab LP |
3593 | static int acquire_home(const ExecContext *c, uid_t uid, const char** home, char **buf) { |
3594 | int r; | |
3595 | ||
3596 | assert(c); | |
3597 | assert(home); | |
3598 | assert(buf); | |
3599 | ||
3600 | /* If WorkingDirectory=~ is set, try to acquire a usable home directory. */ | |
3601 | ||
3602 | if (*home) | |
3603 | return 0; | |
3604 | ||
3605 | if (!c->working_directory_home) | |
3606 | return 0; | |
3607 | ||
6732edab LP |
3608 | r = get_home_dir(buf); |
3609 | if (r < 0) | |
3610 | return r; | |
3611 | ||
3612 | *home = *buf; | |
3613 | return 1; | |
3614 | } | |
3615 | ||
da50b85a LP |
3616 | static int compile_suggested_paths(const ExecContext *c, const ExecParameters *p, char ***ret) { |
3617 | _cleanup_strv_free_ char ** list = NULL; | |
da50b85a LP |
3618 | int r; |
3619 | ||
3620 | assert(c); | |
3621 | assert(p); | |
3622 | assert(ret); | |
3623 | ||
3624 | assert(c->dynamic_user); | |
3625 | ||
3626 | /* Compile a list of paths that it might make sense to read the owning UID from to use as initial candidate for | |
3627 | * dynamic UID allocation, in order to save us from doing costly recursive chown()s of the special | |
3628 | * directories. */ | |
3629 | ||
5b10116e | 3630 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) { |
da50b85a LP |
3631 | if (t == EXEC_DIRECTORY_CONFIGURATION) |
3632 | continue; | |
3633 | ||
3634 | if (!p->prefix[t]) | |
3635 | continue; | |
3636 | ||
211a3d87 | 3637 | for (size_t i = 0; i < c->directories[t].n_items; i++) { |
da50b85a LP |
3638 | char *e; |
3639 | ||
494d0247 | 3640 | if (exec_directory_is_private(c, t)) |
211a3d87 | 3641 | e = path_join(p->prefix[t], "private", c->directories[t].items[i].path); |
494d0247 | 3642 | else |
211a3d87 | 3643 | e = path_join(p->prefix[t], c->directories[t].items[i].path); |
da50b85a LP |
3644 | if (!e) |
3645 | return -ENOMEM; | |
3646 | ||
3647 | r = strv_consume(&list, e); | |
3648 | if (r < 0) | |
3649 | return r; | |
3650 | } | |
3651 | } | |
3652 | ||
ae2a15bc | 3653 | *ret = TAKE_PTR(list); |
da50b85a LP |
3654 | |
3655 | return 0; | |
3656 | } | |
3657 | ||
a8b993dc LP |
3658 | static int exec_parameters_get_cgroup_path( |
3659 | const ExecParameters *params, | |
3660 | const CGroupContext *c, | |
3661 | char **ret) { | |
3662 | ||
3663 | const char *subgroup = NULL; | |
78f93209 LP |
3664 | char *p; |
3665 | ||
3666 | assert(params); | |
3667 | assert(ret); | |
3668 | ||
3669 | if (!params->cgroup_path) | |
3670 | return -EINVAL; | |
3671 | ||
3672 | /* If we are called for a unit where cgroup delegation is on, and the payload created its own populated | |
3673 | * subcgroup (which we expect it to do, after all it asked for delegation), then we cannot place the control | |
3674 | * processes started after the main unit's process in the unit's main cgroup because it is now an inner one, | |
3675 | * and inner cgroups may not contain processes. Hence, if delegation is on, and this is a control process, | |
3676 | * let's use ".control" as subcgroup instead. Note that we do so only for ExecStartPost=, ExecReload=, | |
3677 | * ExecStop=, ExecStopPost=, i.e. for the commands where the main process is already forked. For ExecStartPre= | |
3678 | * this is not necessary, the cgroup is still empty. We distinguish these cases with the EXEC_CONTROL_CGROUP | |
3679 | * flag, which is only passed for the former statements, not for the latter. */ | |
3680 | ||
a8b993dc LP |
3681 | if (FLAGS_SET(params->flags, EXEC_CGROUP_DELEGATE) && (FLAGS_SET(params->flags, EXEC_CONTROL_CGROUP) || c->delegate_subgroup)) { |
3682 | if (FLAGS_SET(params->flags, EXEC_IS_CONTROL)) | |
3683 | subgroup = ".control"; | |
3684 | else | |
3685 | subgroup = c->delegate_subgroup; | |
3686 | } | |
3687 | ||
3688 | if (subgroup) | |
3689 | p = path_join(params->cgroup_path, subgroup); | |
78f93209 LP |
3690 | else |
3691 | p = strdup(params->cgroup_path); | |
3692 | if (!p) | |
3693 | return -ENOMEM; | |
3694 | ||
3695 | *ret = p; | |
a8b993dc | 3696 | return !!subgroup; |
78f93209 LP |
3697 | } |
3698 | ||
e2b2fb7f MS |
3699 | static int exec_context_cpu_affinity_from_numa(const ExecContext *c, CPUSet *ret) { |
3700 | _cleanup_(cpu_set_reset) CPUSet s = {}; | |
3701 | int r; | |
3702 | ||
3703 | assert(c); | |
3704 | assert(ret); | |
3705 | ||
3706 | if (!c->numa_policy.nodes.set) { | |
3707 | log_debug("Can't derive CPU affinity mask from NUMA mask because NUMA mask is not set, ignoring"); | |
3708 | return 0; | |
3709 | } | |
3710 | ||
3711 | r = numa_to_cpu_set(&c->numa_policy, &s); | |
3712 | if (r < 0) | |
3713 | return r; | |
3714 | ||
3715 | cpu_set_reset(ret); | |
3716 | ||
3717 | return cpu_set_add_all(ret, &s); | |
3718 | } | |
3719 | ||
3720 | bool exec_context_get_cpu_affinity_from_numa(const ExecContext *c) { | |
3721 | assert(c); | |
3722 | ||
3723 | return c->cpu_affinity_from_numa; | |
3724 | } | |
3725 | ||
1da37e58 ZJS |
3726 | static int add_shifted_fd(int *fds, size_t fds_size, size_t *n_fds, int fd, int *ret_fd) { |
3727 | int r; | |
3728 | ||
3729 | assert(fds); | |
3730 | assert(n_fds); | |
3731 | assert(*n_fds < fds_size); | |
3732 | assert(ret_fd); | |
3733 | ||
3734 | if (fd < 0) { | |
254d1313 | 3735 | *ret_fd = -EBADF; |
1da37e58 ZJS |
3736 | return 0; |
3737 | } | |
3738 | ||
3739 | if (fd < 3 + (int) *n_fds) { | |
3740 | /* Let's move the fd up, so that it's outside of the fd range we will use to store | |
3741 | * the fds we pass to the process (or which are closed only during execve). */ | |
3742 | ||
3743 | r = fcntl(fd, F_DUPFD_CLOEXEC, 3 + (int) *n_fds); | |
3744 | if (r < 0) | |
3745 | return -errno; | |
3746 | ||
ee3455cf | 3747 | close_and_replace(fd, r); |
1da37e58 ZJS |
3748 | } |
3749 | ||
3750 | *ret_fd = fds[*n_fds] = fd; | |
3751 | (*n_fds) ++; | |
3752 | return 1; | |
3753 | } | |
3754 | ||
cd48e23f RP |
3755 | static int connect_unix_harder(Unit *u, const OpenFile *of, int ofd) { |
3756 | union sockaddr_union addr = { | |
3757 | .un.sun_family = AF_UNIX, | |
3758 | }; | |
3759 | socklen_t sa_len; | |
3760 | static const int socket_types[] = { SOCK_DGRAM, SOCK_STREAM, SOCK_SEQPACKET }; | |
3761 | int r; | |
3762 | ||
3763 | assert(u); | |
3764 | assert(of); | |
3765 | assert(ofd >= 0); | |
3766 | ||
3767 | r = sockaddr_un_set_path(&addr.un, FORMAT_PROC_FD_PATH(ofd)); | |
3768 | if (r < 0) | |
3769 | return log_unit_error_errno(u, r, "Failed to set sockaddr for %s: %m", of->path); | |
3770 | ||
3771 | sa_len = r; | |
3772 | ||
3773 | for (size_t i = 0; i < ELEMENTSOF(socket_types); i++) { | |
3774 | _cleanup_close_ int fd = -EBADF; | |
3775 | ||
3776 | fd = socket(AF_UNIX, socket_types[i] | SOCK_CLOEXEC, 0); | |
3777 | if (fd < 0) | |
3778 | return log_unit_error_errno(u, errno, "Failed to create socket for %s: %m", of->path); | |
3779 | ||
3780 | r = RET_NERRNO(connect(fd, &addr.sa, sa_len)); | |
3781 | if (r == -EPROTOTYPE) | |
3782 | continue; | |
3783 | if (r < 0) | |
3784 | return log_unit_error_errno(u, r, "Failed to connect socket for %s: %m", of->path); | |
3785 | ||
3786 | return TAKE_FD(fd); | |
3787 | } | |
3788 | ||
3789 | return log_unit_error_errno(u, SYNTHETIC_ERRNO(EPROTOTYPE), "Failed to connect socket for \"%s\".", of->path); | |
3790 | } | |
3791 | ||
3792 | static int get_open_file_fd(Unit *u, const OpenFile *of) { | |
3793 | struct stat st; | |
3794 | _cleanup_close_ int fd = -EBADF, ofd = -EBADF; | |
3795 | ||
3796 | assert(u); | |
3797 | assert(of); | |
3798 | ||
3799 | ofd = open(of->path, O_PATH | O_CLOEXEC); | |
3800 | if (ofd < 0) | |
dcebb015 DDM |
3801 | return log_unit_error_errno(u, errno, "Could not open \"%s\": %m", of->path); |
3802 | ||
cd48e23f | 3803 | if (fstat(ofd, &st) < 0) |
dcebb015 | 3804 | return log_unit_error_errno(u, errno, "Failed to stat %s: %m", of->path); |
cd48e23f RP |
3805 | |
3806 | if (S_ISSOCK(st.st_mode)) { | |
3807 | fd = connect_unix_harder(u, of, ofd); | |
3808 | if (fd < 0) | |
3809 | return fd; | |
3810 | ||
3811 | if (FLAGS_SET(of->flags, OPENFILE_READ_ONLY) && shutdown(fd, SHUT_WR) < 0) | |
dcebb015 DDM |
3812 | return log_unit_error_errno(u, errno, "Failed to shutdown send for socket %s: %m", |
3813 | of->path); | |
cd48e23f RP |
3814 | |
3815 | log_unit_debug(u, "socket %s opened (fd=%d)", of->path, fd); | |
3816 | } else { | |
3817 | int flags = FLAGS_SET(of->flags, OPENFILE_READ_ONLY) ? O_RDONLY : O_RDWR; | |
3818 | if (FLAGS_SET(of->flags, OPENFILE_APPEND)) | |
3819 | flags |= O_APPEND; | |
3820 | else if (FLAGS_SET(of->flags, OPENFILE_TRUNCATE)) | |
3821 | flags |= O_TRUNC; | |
3822 | ||
3823 | fd = fd_reopen(ofd, flags | O_CLOEXEC); | |
3824 | if (fd < 0) | |
3825 | return log_unit_error_errno(u, fd, "Failed to open file %s: %m", of->path); | |
3826 | ||
3827 | log_unit_debug(u, "file %s opened (fd=%d)", of->path, fd); | |
3828 | } | |
3829 | ||
3830 | return TAKE_FD(fd); | |
3831 | } | |
3832 | ||
3833 | static int collect_open_file_fds( | |
3834 | Unit *u, | |
3835 | OpenFile* open_files, | |
3836 | int **fds, | |
3837 | char ***fdnames, | |
3838 | size_t *n_fds) { | |
3839 | int r; | |
3840 | ||
3841 | assert(u); | |
3842 | assert(fds); | |
3843 | assert(fdnames); | |
3844 | assert(n_fds); | |
3845 | ||
3846 | LIST_FOREACH(open_files, of, open_files) { | |
3847 | _cleanup_close_ int fd = -EBADF; | |
3848 | ||
3849 | fd = get_open_file_fd(u, of); | |
3850 | if (fd < 0) { | |
3851 | if (FLAGS_SET(of->flags, OPENFILE_GRACEFUL)) { | |
3852 | log_unit_debug_errno(u, fd, "Failed to get OpenFile= file descriptor for %s, ignoring: %m", of->path); | |
3853 | continue; | |
3854 | } | |
3855 | ||
3856 | return fd; | |
3857 | } | |
3858 | ||
3859 | if (!GREEDY_REALLOC(*fds, *n_fds + 1)) | |
3860 | return -ENOMEM; | |
3861 | ||
3862 | r = strv_extend(fdnames, of->fdname); | |
3863 | if (r < 0) | |
3864 | return r; | |
3865 | ||
3866 | (*fds)[*n_fds] = TAKE_FD(fd); | |
3867 | ||
3868 | (*n_fds)++; | |
3869 | } | |
3870 | ||
3871 | return 0; | |
3872 | } | |
3873 | ||
3ff67ec4 ZJS |
3874 | static void log_command_line(Unit *unit, const char *msg, const char *executable, char **argv) { |
3875 | assert(unit); | |
3876 | assert(msg); | |
3877 | assert(executable); | |
3878 | ||
3879 | if (!DEBUG_LOGGING) | |
3880 | return; | |
3881 | ||
3882 | _cleanup_free_ char *cmdline = quote_command_line(argv, SHELL_ESCAPE_EMPTY); | |
3883 | ||
3884 | log_unit_struct(unit, LOG_DEBUG, | |
3885 | "EXECUTABLE=%s", executable, | |
3886 | LOG_UNIT_MESSAGE(unit, "%s: %s", msg, strnull(cmdline)), | |
3887 | LOG_UNIT_INVOCATION_ID(unit)); | |
3888 | } | |
3889 | ||
170d978b LP |
3890 | static bool exec_context_need_unprivileged_private_users( |
3891 | const ExecContext *context, | |
3892 | const ExecParameters *params) { | |
3893 | ||
6ef721cb | 3894 | assert(context); |
170d978b | 3895 | assert(params); |
6ef721cb LB |
3896 | |
3897 | /* These options require PrivateUsers= when used in user units, as we need to be in a user namespace | |
3898 | * to have permission to enable them when not running as root. If we have effective CAP_SYS_ADMIN | |
3899 | * (system manager) then we have privileges and don't need this. */ | |
170d978b | 3900 | if (params->runtime_scope != RUNTIME_SCOPE_USER) |
6ef721cb LB |
3901 | return false; |
3902 | ||
3903 | return context->private_users || | |
3904 | context->private_tmp || | |
3905 | context->private_devices || | |
3906 | context->private_network || | |
3907 | context->network_namespace_path || | |
3908 | context->private_ipc || | |
3909 | context->ipc_namespace_path || | |
adeff822 | 3910 | context->private_mounts > 0 || |
6ef721cb LB |
3911 | context->mount_apivfs || |
3912 | context->n_bind_mounts > 0 || | |
3913 | context->n_temporary_filesystems > 0 || | |
3914 | context->root_directory || | |
3915 | !strv_isempty(context->extension_directories) || | |
3916 | context->protect_system != PROTECT_SYSTEM_NO || | |
3917 | context->protect_home != PROTECT_HOME_NO || | |
3918 | context->protect_kernel_tunables || | |
3919 | context->protect_kernel_modules || | |
3920 | context->protect_kernel_logs || | |
3921 | context->protect_control_groups || | |
3922 | context->protect_clock || | |
3923 | context->protect_hostname || | |
3924 | !strv_isempty(context->read_write_paths) || | |
3925 | !strv_isempty(context->read_only_paths) || | |
3926 | !strv_isempty(context->inaccessible_paths) || | |
3927 | !strv_isempty(context->exec_paths) || | |
3928 | !strv_isempty(context->no_exec_paths); | |
3929 | } | |
3930 | ||
ff0af2a1 | 3931 | static int exec_child( |
f2341e0a | 3932 | Unit *unit, |
34cf6c43 | 3933 | const ExecCommand *command, |
ff0af2a1 LP |
3934 | const ExecContext *context, |
3935 | const ExecParameters *params, | |
28135da3 | 3936 | ExecRuntime *runtime, |
6bb00842 | 3937 | const CGroupContext *cgroup_context, |
ff0af2a1 | 3938 | int socket_fd, |
2caa38e9 | 3939 | const int named_iofds[static 3], |
cd48e23f | 3940 | int *params_fds, |
da6053d0 | 3941 | size_t n_socket_fds, |
25b583d7 | 3942 | size_t n_storage_fds, |
ff0af2a1 | 3943 | char **files_env, |
00d9ef85 | 3944 | int user_lookup_fd, |
12145637 | 3945 | int *exit_status) { |
d35fbf6b | 3946 | |
8c35c10d | 3947 | _cleanup_strv_free_ char **our_env = NULL, **pass_env = NULL, **joined_exec_search_path = NULL, **accum_env = NULL, **replaced_argv = NULL; |
1da37e58 | 3948 | int r, ngids = 0, exec_fd; |
4d885bd3 DH |
3949 | _cleanup_free_ gid_t *supplementary_gids = NULL; |
3950 | const char *username = NULL, *groupname = NULL; | |
73ff4d48 | 3951 | _cleanup_free_ char *home_buffer = NULL, *memory_pressure_path = NULL; |
2b3c1b9e | 3952 | const char *home = NULL, *shell = NULL; |
7ca69792 | 3953 | char **final_argv = NULL; |
7bce046b LP |
3954 | dev_t journal_stream_dev = 0; |
3955 | ino_t journal_stream_ino = 0; | |
5749f855 | 3956 | bool userns_set_up = false; |
165a31c0 LP |
3957 | bool needs_sandboxing, /* Do we need to set up full sandboxing? (i.e. all namespacing, all MAC stuff, caps, yadda yadda */ |
3958 | needs_setuid, /* Do we need to do the actual setresuid()/setresgid() calls? */ | |
3959 | needs_mount_namespace, /* Do we need to set up a mount namespace for this kernel? */ | |
3960 | needs_ambient_hack; /* Do we need to apply the ambient capabilities hack? */ | |
349cc4a5 | 3961 | #if HAVE_SELINUX |
7f59dd35 | 3962 | _cleanup_free_ char *mac_selinux_context_net = NULL; |
43b1f709 | 3963 | bool use_selinux = false; |
ecfbc84f | 3964 | #endif |
f9fa32f0 | 3965 | #if ENABLE_SMACK |
43b1f709 | 3966 | bool use_smack = false; |
ecfbc84f | 3967 | #endif |
349cc4a5 | 3968 | #if HAVE_APPARMOR |
43b1f709 | 3969 | bool use_apparmor = false; |
ecfbc84f | 3970 | #endif |
5749f855 AZ |
3971 | uid_t saved_uid = getuid(); |
3972 | gid_t saved_gid = getgid(); | |
fed1e721 LP |
3973 | uid_t uid = UID_INVALID; |
3974 | gid_t gid = GID_INVALID; | |
1da37e58 ZJS |
3975 | size_t n_fds = n_socket_fds + n_storage_fds, /* fds to pass to the child */ |
3976 | n_keep_fds; /* total number of fds not to close */ | |
165a31c0 | 3977 | int secure_bits; |
afb11bf1 DG |
3978 | _cleanup_free_ gid_t *gids_after_pam = NULL; |
3979 | int ngids_after_pam = 0; | |
cd48e23f RP |
3980 | _cleanup_free_ int *fds = NULL; |
3981 | _cleanup_strv_free_ char **fdnames = NULL; | |
034c6ed7 | 3982 | |
f2341e0a | 3983 | assert(unit); |
5cb5a6ff LP |
3984 | assert(command); |
3985 | assert(context); | |
d35fbf6b | 3986 | assert(params); |
ff0af2a1 | 3987 | assert(exit_status); |
d35fbf6b | 3988 | |
69339ae9 LP |
3989 | /* Explicitly test for CVE-2021-4034 inspired invocations */ |
3990 | assert(command->path); | |
3991 | assert(!strv_isempty(command->argv)); | |
3992 | ||
d35fbf6b DM |
3993 | rename_process_from_path(command->path); |
3994 | ||
9c274488 LP |
3995 | /* We reset exactly these signals, since they are the only ones we set to SIG_IGN in the main |
3996 | * daemon. All others we leave untouched because we set them to SIG_DFL or a valid handler initially, | |
3997 | * both of which will be demoted to SIG_DFL. */ | |
ce30c8dc | 3998 | (void) default_signals(SIGNALS_CRASH_HANDLER, |
9c274488 | 3999 | SIGNALS_IGNORE); |
d35fbf6b DM |
4000 | |
4001 | if (context->ignore_sigpipe) | |
9c274488 | 4002 | (void) ignore_signals(SIGPIPE); |
d35fbf6b | 4003 | |
ff0af2a1 LP |
4004 | r = reset_signal_mask(); |
4005 | if (r < 0) { | |
4006 | *exit_status = EXIT_SIGNAL_MASK; | |
12145637 | 4007 | return log_unit_error_errno(unit, r, "Failed to set process signal mask: %m"); |
d35fbf6b | 4008 | } |
034c6ed7 | 4009 | |
d35fbf6b DM |
4010 | if (params->idle_pipe) |
4011 | do_idle_pipe_dance(params->idle_pipe); | |
4f2d528d | 4012 | |
2c027c62 LP |
4013 | /* Close fds we don't need very early to make sure we don't block init reexecution because it cannot bind its |
4014 | * sockets. Among the fds we close are the logging fds, and we want to keep them closed, so that we don't have | |
4015 | * any fds open we don't really want open during the transition. In order to make logging work, we switch the | |
4016 | * log subsystem into open_when_needed mode, so that it reopens the logs on every single log call. */ | |
ff0af2a1 | 4017 | |
d35fbf6b | 4018 | log_forget_fds(); |
2c027c62 | 4019 | log_set_open_when_needed(true); |
a3b00f91 | 4020 | log_settle_target(); |
4f2d528d | 4021 | |
40a80078 LP |
4022 | /* In case anything used libc syslog(), close this here, too */ |
4023 | closelog(); | |
4024 | ||
cd48e23f RP |
4025 | fds = newdup(int, params_fds, n_fds); |
4026 | if (!fds) { | |
4027 | *exit_status = EXIT_MEMORY; | |
4028 | return log_oom(); | |
4029 | } | |
4030 | ||
4031 | fdnames = strv_copy((char**) params->fd_names); | |
4032 | if (!fdnames) { | |
4033 | *exit_status = EXIT_MEMORY; | |
4034 | return log_oom(); | |
4035 | } | |
4036 | ||
4037 | r = collect_open_file_fds(unit, params->open_files, &fds, &fdnames, &n_fds); | |
4038 | if (r < 0) { | |
4039 | *exit_status = EXIT_FDS; | |
4040 | return log_unit_error_errno(unit, r, "Failed to get OpenFile= file descriptors: %m"); | |
4041 | } | |
4042 | ||
b1994387 | 4043 | int keep_fds[n_fds + 3]; |
1da37e58 ZJS |
4044 | memcpy_safe(keep_fds, fds, n_fds * sizeof(int)); |
4045 | n_keep_fds = n_fds; | |
4046 | ||
4047 | r = add_shifted_fd(keep_fds, ELEMENTSOF(keep_fds), &n_keep_fds, params->exec_fd, &exec_fd); | |
4048 | if (r < 0) { | |
4049 | *exit_status = EXIT_FDS; | |
4050 | return log_unit_error_errno(unit, r, "Failed to shift fd and set FD_CLOEXEC: %m"); | |
4051 | } | |
4052 | ||
b1994387 | 4053 | #if HAVE_LIBBPF |
46004616 ZJS |
4054 | if (unit->manager->restrict_fs) { |
4055 | int bpf_map_fd = lsm_bpf_map_restrict_fs_fd(unit); | |
b1994387 ILG |
4056 | if (bpf_map_fd < 0) { |
4057 | *exit_status = EXIT_FDS; | |
46004616 | 4058 | return log_unit_error_errno(unit, bpf_map_fd, "Failed to get restrict filesystems BPF map fd: %m"); |
b1994387 ILG |
4059 | } |
4060 | ||
4061 | r = add_shifted_fd(keep_fds, ELEMENTSOF(keep_fds), &n_keep_fds, bpf_map_fd, &bpf_map_fd); | |
4062 | if (r < 0) { | |
4063 | *exit_status = EXIT_FDS; | |
4064 | return log_unit_error_errno(unit, r, "Failed to shift fd and set FD_CLOEXEC: %m"); | |
4065 | } | |
4066 | } | |
4067 | #endif | |
4068 | ||
15220772 | 4069 | r = close_remaining_fds(params, runtime, user_lookup_fd, socket_fd, keep_fds, n_keep_fds); |
ff0af2a1 LP |
4070 | if (r < 0) { |
4071 | *exit_status = EXIT_FDS; | |
12145637 | 4072 | return log_unit_error_errno(unit, r, "Failed to close unwanted file descriptors: %m"); |
8c7be95e LP |
4073 | } |
4074 | ||
0af07108 ZJS |
4075 | if (!context->same_pgrp && |
4076 | setsid() < 0) { | |
4077 | *exit_status = EXIT_SETSID; | |
4078 | return log_unit_error_errno(unit, errno, "Failed to create new process session: %m"); | |
4079 | } | |
9e2f7c11 | 4080 | |
1e22b5cd | 4081 | exec_context_tty_reset(context, params); |
d35fbf6b | 4082 | |
c891efaf | 4083 | if (unit_shall_confirm_spawn(unit)) { |
3b20f877 FB |
4084 | _cleanup_free_ char *cmdline = NULL; |
4085 | ||
4ef15008 | 4086 | cmdline = quote_command_line(command->argv, SHELL_ESCAPE_EMPTY); |
3b20f877 | 4087 | if (!cmdline) { |
0460aa5c | 4088 | *exit_status = EXIT_MEMORY; |
12145637 | 4089 | return log_oom(); |
3b20f877 | 4090 | } |
d35fbf6b | 4091 | |
4ef15008 | 4092 | r = ask_for_confirmation(context, params->confirm_spawn, unit, cmdline); |
3b20f877 FB |
4093 | if (r != CONFIRM_EXECUTE) { |
4094 | if (r == CONFIRM_PRETEND_SUCCESS) { | |
4095 | *exit_status = EXIT_SUCCESS; | |
4096 | return 0; | |
4097 | } | |
5fa01ac0 | 4098 | |
ff0af2a1 | 4099 | *exit_status = EXIT_CONFIRM; |
0af07108 ZJS |
4100 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(ECANCELED), |
4101 | "Execution cancelled by the user"); | |
d35fbf6b DM |
4102 | } |
4103 | } | |
1a63a750 | 4104 | |
d521916d LP |
4105 | /* We are about to invoke NSS and PAM modules. Let's tell them what we are doing here, maybe they care. This is |
4106 | * used by nss-resolve to disable itself when we are about to start systemd-resolved, to avoid deadlocks. Note | |
4107 | * that these env vars do not survive the execve(), which means they really only apply to the PAM and NSS | |
4108 | * invocations themselves. Also note that while we'll only invoke NSS modules involved in user management they | |
4109 | * might internally call into other NSS modules that are involved in hostname resolution, we never know. */ | |
4110 | if (setenv("SYSTEMD_ACTIVATION_UNIT", unit->id, true) != 0 || | |
170d978b | 4111 | setenv("SYSTEMD_ACTIVATION_SCOPE", runtime_scope_to_string(params->runtime_scope), true) != 0) { |
d521916d LP |
4112 | *exit_status = EXIT_MEMORY; |
4113 | return log_unit_error_errno(unit, errno, "Failed to update environment: %m"); | |
4114 | } | |
4115 | ||
15220772 | 4116 | if (context->dynamic_user && runtime && runtime->dynamic_creds) { |
da50b85a | 4117 | _cleanup_strv_free_ char **suggested_paths = NULL; |
29206d46 | 4118 | |
d521916d | 4119 | /* On top of that, make sure we bypass our own NSS module nss-systemd comprehensively for any NSS |
7802194a | 4120 | * checks, if DynamicUser=1 is used, as we shouldn't create a feedback loop with ourselves here. */ |
409093fe LP |
4121 | if (putenv((char*) "SYSTEMD_NSS_DYNAMIC_BYPASS=1") != 0) { |
4122 | *exit_status = EXIT_USER; | |
12145637 | 4123 | return log_unit_error_errno(unit, errno, "Failed to update environment: %m"); |
409093fe LP |
4124 | } |
4125 | ||
da50b85a LP |
4126 | r = compile_suggested_paths(context, params, &suggested_paths); |
4127 | if (r < 0) { | |
4128 | *exit_status = EXIT_MEMORY; | |
4129 | return log_oom(); | |
4130 | } | |
4131 | ||
15220772 | 4132 | r = dynamic_creds_realize(runtime->dynamic_creds, suggested_paths, &uid, &gid); |
ff0af2a1 LP |
4133 | if (r < 0) { |
4134 | *exit_status = EXIT_USER; | |
d85ff944 YW |
4135 | if (r == -EILSEQ) |
4136 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(EOPNOTSUPP), | |
4137 | "Failed to update dynamic user credentials: User or group with specified name already exists."); | |
12145637 | 4138 | return log_unit_error_errno(unit, r, "Failed to update dynamic user credentials: %m"); |
524daa8c | 4139 | } |
524daa8c | 4140 | |
70dd455c | 4141 | if (!uid_is_valid(uid)) { |
29206d46 | 4142 | *exit_status = EXIT_USER; |
d85ff944 | 4143 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(ESRCH), "UID validation failed for \""UID_FMT"\"", uid); |
70dd455c ZJS |
4144 | } |
4145 | ||
4146 | if (!gid_is_valid(gid)) { | |
4147 | *exit_status = EXIT_USER; | |
d85ff944 | 4148 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(ESRCH), "GID validation failed for \""GID_FMT"\"", gid); |
29206d46 | 4149 | } |
5bc7452b | 4150 | |
15220772 DDM |
4151 | if (runtime->dynamic_creds->user) |
4152 | username = runtime->dynamic_creds->user->name; | |
29206d46 LP |
4153 | |
4154 | } else { | |
4d885bd3 DH |
4155 | r = get_fixed_user(context, &username, &uid, &gid, &home, &shell); |
4156 | if (r < 0) { | |
4157 | *exit_status = EXIT_USER; | |
12145637 | 4158 | return log_unit_error_errno(unit, r, "Failed to determine user credentials: %m"); |
5bc7452b | 4159 | } |
5bc7452b | 4160 | |
4d885bd3 DH |
4161 | r = get_fixed_group(context, &groupname, &gid); |
4162 | if (r < 0) { | |
4163 | *exit_status = EXIT_GROUP; | |
12145637 | 4164 | return log_unit_error_errno(unit, r, "Failed to determine group credentials: %m"); |
4d885bd3 | 4165 | } |
cdc5d5c5 | 4166 | } |
29206d46 | 4167 | |
cdc5d5c5 DH |
4168 | /* Initialize user supplementary groups and get SupplementaryGroups= ones */ |
4169 | r = get_supplementary_groups(context, username, groupname, gid, | |
4170 | &supplementary_gids, &ngids); | |
4171 | if (r < 0) { | |
4172 | *exit_status = EXIT_GROUP; | |
12145637 | 4173 | return log_unit_error_errno(unit, r, "Failed to determine supplementary groups: %m"); |
29206d46 | 4174 | } |
5bc7452b | 4175 | |
00d9ef85 LP |
4176 | r = send_user_lookup(unit, user_lookup_fd, uid, gid); |
4177 | if (r < 0) { | |
4178 | *exit_status = EXIT_USER; | |
12145637 | 4179 | return log_unit_error_errno(unit, r, "Failed to send user credentials to PID1: %m"); |
00d9ef85 LP |
4180 | } |
4181 | ||
4182 | user_lookup_fd = safe_close(user_lookup_fd); | |
4183 | ||
6732edab LP |
4184 | r = acquire_home(context, uid, &home, &home_buffer); |
4185 | if (r < 0) { | |
4186 | *exit_status = EXIT_CHDIR; | |
12145637 | 4187 | return log_unit_error_errno(unit, r, "Failed to determine $HOME for user: %m"); |
6732edab LP |
4188 | } |
4189 | ||
4a055e5a | 4190 | /* If a socket is connected to STDIN/STDOUT/STDERR, we must drop O_NONBLOCK */ |
d35fbf6b | 4191 | if (socket_fd >= 0) |
a34ceba6 | 4192 | (void) fd_nonblock(socket_fd, false); |
acbb0225 | 4193 | |
4c70a4a7 MS |
4194 | /* Journald will try to look-up our cgroup in order to populate _SYSTEMD_CGROUP and _SYSTEMD_UNIT fields. |
4195 | * Hence we need to migrate to the target cgroup from init.scope before connecting to journald */ | |
4196 | if (params->cgroup_path) { | |
4197 | _cleanup_free_ char *p = NULL; | |
4198 | ||
a8b993dc | 4199 | r = exec_parameters_get_cgroup_path(params, cgroup_context, &p); |
4c70a4a7 MS |
4200 | if (r < 0) { |
4201 | *exit_status = EXIT_CGROUP; | |
4202 | return log_unit_error_errno(unit, r, "Failed to acquire cgroup path: %m"); | |
4203 | } | |
4204 | ||
4205 | r = cg_attach_everywhere(params->cgroup_supported, p, 0, NULL, NULL); | |
702cf08f YW |
4206 | if (r == -EUCLEAN) { |
4207 | *exit_status = EXIT_CGROUP; | |
4208 | return log_unit_error_errno(unit, r, "Failed to attach process to cgroup %s " | |
4209 | "because the cgroup or one of its parents or " | |
4210 | "siblings is in the threaded mode: %m", p); | |
4211 | } | |
4c70a4a7 MS |
4212 | if (r < 0) { |
4213 | *exit_status = EXIT_CGROUP; | |
4214 | return log_unit_error_errno(unit, r, "Failed to attach to cgroup %s: %m", p); | |
4215 | } | |
4216 | } | |
4217 | ||
28135da3 DDM |
4218 | if (context->network_namespace_path && runtime && runtime->shared && runtime->shared->netns_storage_socket[0] >= 0) { |
4219 | r = open_shareable_ns_path(runtime->shared->netns_storage_socket, context->network_namespace_path, CLONE_NEWNET); | |
a8d08f39 LP |
4220 | if (r < 0) { |
4221 | *exit_status = EXIT_NETWORK; | |
4222 | return log_unit_error_errno(unit, r, "Failed to open network namespace path %s: %m", context->network_namespace_path); | |
4223 | } | |
4224 | } | |
4225 | ||
28135da3 DDM |
4226 | if (context->ipc_namespace_path && runtime && runtime->shared && runtime->shared->ipcns_storage_socket[0] >= 0) { |
4227 | r = open_shareable_ns_path(runtime->shared->ipcns_storage_socket, context->ipc_namespace_path, CLONE_NEWIPC); | |
a70581ff XR |
4228 | if (r < 0) { |
4229 | *exit_status = EXIT_NAMESPACE; | |
4230 | return log_unit_error_errno(unit, r, "Failed to open IPC namespace path %s: %m", context->ipc_namespace_path); | |
4231 | } | |
4232 | } | |
4233 | ||
52c239d7 | 4234 | r = setup_input(context, params, socket_fd, named_iofds); |
ff0af2a1 LP |
4235 | if (r < 0) { |
4236 | *exit_status = EXIT_STDIN; | |
12145637 | 4237 | return log_unit_error_errno(unit, r, "Failed to set up standard input: %m"); |
d35fbf6b | 4238 | } |
034c6ed7 | 4239 | |
52c239d7 | 4240 | r = setup_output(unit, context, params, STDOUT_FILENO, socket_fd, named_iofds, basename(command->path), uid, gid, &journal_stream_dev, &journal_stream_ino); |
ff0af2a1 LP |
4241 | if (r < 0) { |
4242 | *exit_status = EXIT_STDOUT; | |
12145637 | 4243 | return log_unit_error_errno(unit, r, "Failed to set up standard output: %m"); |
d35fbf6b DM |
4244 | } |
4245 | ||
52c239d7 | 4246 | r = setup_output(unit, context, params, STDERR_FILENO, socket_fd, named_iofds, basename(command->path), uid, gid, &journal_stream_dev, &journal_stream_ino); |
ff0af2a1 LP |
4247 | if (r < 0) { |
4248 | *exit_status = EXIT_STDERR; | |
12145637 | 4249 | return log_unit_error_errno(unit, r, "Failed to set up standard error output: %m"); |
d35fbf6b DM |
4250 | } |
4251 | ||
d35fbf6b | 4252 | if (context->oom_score_adjust_set) { |
bb44fd07 ZJS |
4253 | /* When we can't make this change due to EPERM, then let's silently skip over it. User |
4254 | * namespaces prohibit write access to this file, and we shouldn't trip up over that. */ | |
9f8168eb | 4255 | r = set_oom_score_adjust(context->oom_score_adjust); |
bb44fd07 ZJS |
4256 | if (ERRNO_IS_NEG_PRIVILEGE(r)) |
4257 | log_unit_debug_errno(unit, r, | |
4258 | "Failed to adjust OOM setting, assuming containerized execution, ignoring: %m"); | |
4259 | else if (r < 0) { | |
4260 | *exit_status = EXIT_OOM_ADJUST; | |
4261 | return log_unit_error_errno(unit, r, "Failed to adjust OOM setting: %m"); | |
613b411c | 4262 | } |
d35fbf6b DM |
4263 | } |
4264 | ||
ad21e542 ZJS |
4265 | if (context->coredump_filter_set) { |
4266 | r = set_coredump_filter(context->coredump_filter); | |
bb44fd07 ZJS |
4267 | if (ERRNO_IS_NEG_PRIVILEGE(r)) |
4268 | log_unit_debug_errno(unit, r, "Failed to adjust coredump_filter, ignoring: %m"); | |
5fa01ac0 ZJS |
4269 | else if (r < 0) { |
4270 | *exit_status = EXIT_LIMITS; | |
bb44fd07 | 4271 | return log_unit_error_errno(unit, r, "Failed to adjust coredump_filter: %m"); |
5cf4c468 | 4272 | } |
ad21e542 ZJS |
4273 | } |
4274 | ||
39090201 DJL |
4275 | if (context->nice_set) { |
4276 | r = setpriority_closest(context->nice); | |
5fa01ac0 ZJS |
4277 | if (r < 0) { |
4278 | *exit_status = EXIT_NICE; | |
39090201 | 4279 | return log_unit_error_errno(unit, r, "Failed to set up process scheduling priority (nice level): %m"); |
5fa01ac0 | 4280 | } |
39090201 | 4281 | } |
613b411c | 4282 | |
d35fbf6b DM |
4283 | if (context->cpu_sched_set) { |
4284 | struct sched_param param = { | |
4285 | .sched_priority = context->cpu_sched_priority, | |
4286 | }; | |
4287 | ||
ff0af2a1 LP |
4288 | r = sched_setscheduler(0, |
4289 | context->cpu_sched_policy | | |
4290 | (context->cpu_sched_reset_on_fork ? | |
4291 | SCHED_RESET_ON_FORK : 0), | |
4292 | ¶m); | |
4293 | if (r < 0) { | |
4294 | *exit_status = EXIT_SETSCHEDULER; | |
12145637 | 4295 | return log_unit_error_errno(unit, errno, "Failed to set up CPU scheduling: %m"); |
fc9b2a84 | 4296 | } |
d35fbf6b | 4297 | } |
fc9b2a84 | 4298 | |
e2b2fb7f MS |
4299 | if (context->cpu_affinity_from_numa || context->cpu_set.set) { |
4300 | _cleanup_(cpu_set_reset) CPUSet converted_cpu_set = {}; | |
4301 | const CPUSet *cpu_set; | |
4302 | ||
4303 | if (context->cpu_affinity_from_numa) { | |
4304 | r = exec_context_cpu_affinity_from_numa(context, &converted_cpu_set); | |
4305 | if (r < 0) { | |
4306 | *exit_status = EXIT_CPUAFFINITY; | |
4307 | return log_unit_error_errno(unit, r, "Failed to derive CPU affinity mask from NUMA mask: %m"); | |
4308 | } | |
4309 | ||
4310 | cpu_set = &converted_cpu_set; | |
4311 | } else | |
4312 | cpu_set = &context->cpu_set; | |
4313 | ||
4314 | if (sched_setaffinity(0, cpu_set->allocated, cpu_set->set) < 0) { | |
ff0af2a1 | 4315 | *exit_status = EXIT_CPUAFFINITY; |
12145637 | 4316 | return log_unit_error_errno(unit, errno, "Failed to set up CPU affinity: %m"); |
034c6ed7 | 4317 | } |
e2b2fb7f | 4318 | } |
034c6ed7 | 4319 | |
b070c7c0 MS |
4320 | if (mpol_is_valid(numa_policy_get_type(&context->numa_policy))) { |
4321 | r = apply_numa_policy(&context->numa_policy); | |
bb44fd07 ZJS |
4322 | if (ERRNO_IS_NEG_NOT_SUPPORTED(r)) |
4323 | log_unit_debug_errno(unit, r, "NUMA support not available, ignoring."); | |
4324 | else if (r < 0) { | |
4325 | *exit_status = EXIT_NUMA_POLICY; | |
4326 | return log_unit_error_errno(unit, r, "Failed to set NUMA memory policy: %m"); | |
b070c7c0 MS |
4327 | } |
4328 | } | |
4329 | ||
d35fbf6b DM |
4330 | if (context->ioprio_set) |
4331 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
ff0af2a1 | 4332 | *exit_status = EXIT_IOPRIO; |
12145637 | 4333 | return log_unit_error_errno(unit, errno, "Failed to set up IO scheduling priority: %m"); |
d35fbf6b | 4334 | } |
da726a4d | 4335 | |
d35fbf6b DM |
4336 | if (context->timer_slack_nsec != NSEC_INFINITY) |
4337 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { | |
ff0af2a1 | 4338 | *exit_status = EXIT_TIMERSLACK; |
12145637 | 4339 | return log_unit_error_errno(unit, errno, "Failed to set up timer slack: %m"); |
4c2630eb | 4340 | } |
9eba9da4 | 4341 | |
21022b9d LP |
4342 | if (context->personality != PERSONALITY_INVALID) { |
4343 | r = safe_personality(context->personality); | |
4344 | if (r < 0) { | |
ff0af2a1 | 4345 | *exit_status = EXIT_PERSONALITY; |
12145637 | 4346 | return log_unit_error_errno(unit, r, "Failed to set up execution domain (personality): %m"); |
4c2630eb | 4347 | } |
21022b9d | 4348 | } |
94f04347 | 4349 | |
33331d11 VB |
4350 | if (context->utmp_id) { |
4351 | const char *line = context->tty_path ? | |
4352 | (path_startswith(context->tty_path, "/dev/") ?: context->tty_path) : | |
4353 | NULL; | |
df0ff127 | 4354 | utmp_put_init_process(context->utmp_id, getpid_cached(), getsid(0), |
33331d11 | 4355 | line, |
023a4f67 LP |
4356 | context->utmp_mode == EXEC_UTMP_INIT ? INIT_PROCESS : |
4357 | context->utmp_mode == EXEC_UTMP_LOGIN ? LOGIN_PROCESS : | |
4358 | USER_PROCESS, | |
6a93917d | 4359 | username); |
33331d11 | 4360 | } |
d35fbf6b | 4361 | |
08f67696 | 4362 | if (uid_is_valid(uid)) { |
ff0af2a1 LP |
4363 | r = chown_terminal(STDIN_FILENO, uid); |
4364 | if (r < 0) { | |
4365 | *exit_status = EXIT_STDIN; | |
12145637 | 4366 | return log_unit_error_errno(unit, r, "Failed to change ownership of terminal: %m"); |
071830ff | 4367 | } |
d35fbf6b | 4368 | } |
8e274523 | 4369 | |
6bb00842 LP |
4370 | if (params->cgroup_path) { |
4371 | /* If delegation is enabled we'll pass ownership of the cgroup to the user of the new process. On cgroup v1 | |
4372 | * this is only about systemd's own hierarchy, i.e. not the controller hierarchies, simply because that's not | |
4373 | * safe. On cgroup v2 there's only one hierarchy anyway, and delegation is safe there, hence in that case only | |
4374 | * touch a single hierarchy too. */ | |
4375 | ||
4376 | if (params->flags & EXEC_CGROUP_DELEGATE) { | |
a8b993dc LP |
4377 | _cleanup_free_ char *p = NULL; |
4378 | ||
6bb00842 LP |
4379 | r = cg_set_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, uid, gid); |
4380 | if (r < 0) { | |
4381 | *exit_status = EXIT_CGROUP; | |
4382 | return log_unit_error_errno(unit, r, "Failed to adjust control group access: %m"); | |
4383 | } | |
a8b993dc LP |
4384 | |
4385 | r = exec_parameters_get_cgroup_path(params, cgroup_context, &p); | |
4386 | if (r < 0) { | |
4387 | *exit_status = EXIT_CGROUP; | |
4388 | return log_unit_error_errno(unit, r, "Failed to acquire cgroup path: %m"); | |
4389 | } | |
4390 | if (r > 0) { | |
bcd9b981 | 4391 | r = cg_set_access_recursive(SYSTEMD_CGROUP_CONTROLLER, p, uid, gid); |
a8b993dc LP |
4392 | if (r < 0) { |
4393 | *exit_status = EXIT_CGROUP; | |
4394 | return log_unit_error_errno(unit, r, "Failed to adjust control subgroup access: %m"); | |
4395 | } | |
4396 | } | |
6bb00842 LP |
4397 | } |
4398 | ||
4399 | if (cgroup_context && cg_unified() > 0 && is_pressure_supported() > 0) { | |
4400 | if (cgroup_context_want_memory_pressure(cgroup_context)) { | |
4401 | r = cg_get_path("memory", params->cgroup_path, "memory.pressure", &memory_pressure_path); | |
4402 | if (r < 0) { | |
4403 | *exit_status = EXIT_MEMORY; | |
4404 | return log_oom(); | |
4405 | } | |
4406 | ||
4407 | r = chmod_and_chown(memory_pressure_path, 0644, uid, gid); | |
4408 | if (r < 0) { | |
4409 | log_unit_full_errno(unit, r == -ENOENT || ERRNO_IS_PRIVILEGE(r) ? LOG_DEBUG : LOG_WARNING, r, | |
4410 | "Failed to adjust ownership of '%s', ignoring: %m", memory_pressure_path); | |
4411 | memory_pressure_path = mfree(memory_pressure_path); | |
4412 | } | |
4413 | } else if (cgroup_context->memory_pressure_watch == CGROUP_PRESSURE_WATCH_OFF) { | |
4414 | memory_pressure_path = strdup("/dev/null"); /* /dev/null is explicit indicator for turning of memory pressure watch */ | |
4415 | if (!memory_pressure_path) { | |
4416 | *exit_status = EXIT_MEMORY; | |
4417 | return log_oom(); | |
4418 | } | |
4419 | } | |
034c6ed7 | 4420 | } |
d35fbf6b | 4421 | } |
034c6ed7 | 4422 | |
211a3d87 LB |
4423 | needs_mount_namespace = exec_needs_mount_namespace(context, params, runtime); |
4424 | ||
5b10116e | 4425 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
59dd2bbb | 4426 | r = setup_exec_directory(unit, context, params, uid, gid, dt, needs_mount_namespace, exit_status); |
12145637 LP |
4427 | if (r < 0) |
4428 | return log_unit_error_errno(unit, r, "Failed to set up special execution directory in %s: %m", params->prefix[dt]); | |
d35fbf6b | 4429 | } |
94f04347 | 4430 | |
bb0c0d6f | 4431 | if (FLAGS_SET(params->flags, EXEC_WRITE_CREDENTIALS)) { |
43962c30 | 4432 | r = exec_setup_credentials(context, params, unit->id, uid, gid); |
bb0c0d6f LP |
4433 | if (r < 0) { |
4434 | *exit_status = EXIT_CREDENTIALS; | |
4435 | return log_unit_error_errno(unit, r, "Failed to set up credentials: %m"); | |
4436 | } | |
4437 | } | |
4438 | ||
7bce046b | 4439 | r = build_environment( |
fd63e712 | 4440 | unit, |
7bce046b LP |
4441 | context, |
4442 | params, | |
6bb00842 | 4443 | cgroup_context, |
7bce046b | 4444 | n_fds, |
cd48e23f | 4445 | fdnames, |
7bce046b LP |
4446 | home, |
4447 | username, | |
4448 | shell, | |
4449 | journal_stream_dev, | |
4450 | journal_stream_ino, | |
6bb00842 | 4451 | memory_pressure_path, |
7bce046b | 4452 | &our_env); |
2065ca69 JW |
4453 | if (r < 0) { |
4454 | *exit_status = EXIT_MEMORY; | |
12145637 | 4455 | return log_oom(); |
2065ca69 JW |
4456 | } |
4457 | ||
4458 | r = build_pass_environment(context, &pass_env); | |
4459 | if (r < 0) { | |
4460 | *exit_status = EXIT_MEMORY; | |
12145637 | 4461 | return log_oom(); |
2065ca69 JW |
4462 | } |
4463 | ||
adf769b0 ZJS |
4464 | /* The $PATH variable is set to the default path in params->environment. However, this is overridden |
4465 | * if user-specified fields have $PATH set. The intention is to also override $PATH if the unit does | |
4466 | * not specify PATH but the unit has ExecSearchPath. */ | |
8c35c10d | 4467 | if (!strv_isempty(context->exec_search_path)) { |
4468 | _cleanup_free_ char *joined = NULL; | |
4469 | ||
4470 | joined = strv_join(context->exec_search_path, ":"); | |
4471 | if (!joined) { | |
4472 | *exit_status = EXIT_MEMORY; | |
4473 | return log_oom(); | |
4474 | } | |
4475 | ||
4476 | r = strv_env_assign(&joined_exec_search_path, "PATH", joined); | |
4477 | if (r < 0) { | |
4478 | *exit_status = EXIT_MEMORY; | |
4479 | return log_oom(); | |
4480 | } | |
4481 | } | |
4482 | ||
4ab3d29f | 4483 | accum_env = strv_env_merge(params->environment, |
2065ca69 | 4484 | our_env, |
8c35c10d | 4485 | joined_exec_search_path, |
2065ca69 JW |
4486 | pass_env, |
4487 | context->environment, | |
44e5d006 | 4488 | files_env); |
2065ca69 JW |
4489 | if (!accum_env) { |
4490 | *exit_status = EXIT_MEMORY; | |
12145637 | 4491 | return log_oom(); |
2065ca69 | 4492 | } |
1280503b | 4493 | accum_env = strv_env_clean(accum_env); |
2065ca69 | 4494 | |
096424d1 | 4495 | (void) umask(context->umask); |
b213e1c1 | 4496 | |
b1edf445 | 4497 | r = setup_keyring(unit, context, params, uid, gid); |
74dd6b51 LP |
4498 | if (r < 0) { |
4499 | *exit_status = EXIT_KEYRING; | |
12145637 | 4500 | return log_unit_error_errno(unit, r, "Failed to set up kernel keyring: %m"); |
74dd6b51 LP |
4501 | } |
4502 | ||
adf769b0 ZJS |
4503 | /* We need sandboxing if the caller asked us to apply it and the command isn't explicitly excepted |
4504 | * from it. */ | |
1703fa41 | 4505 | needs_sandboxing = (params->flags & EXEC_APPLY_SANDBOXING) && !(command->flags & EXEC_COMMAND_FULLY_PRIVILEGED); |
7f18ef0a | 4506 | |
adf769b0 ZJS |
4507 | /* We need the ambient capability hack, if the caller asked us to apply it and the command is marked |
4508 | * for it, and the kernel doesn't actually support ambient caps. */ | |
165a31c0 | 4509 | needs_ambient_hack = (params->flags & EXEC_APPLY_SANDBOXING) && (command->flags & EXEC_COMMAND_AMBIENT_MAGIC) && !ambient_capabilities_supported(); |
7f18ef0a | 4510 | |
adf769b0 ZJS |
4511 | /* We need setresuid() if the caller asked us to apply sandboxing and the command isn't explicitly |
4512 | * excepted from either whole sandboxing or just setresuid() itself, and the ambient hack is not | |
4513 | * desired. */ | |
165a31c0 LP |
4514 | if (needs_ambient_hack) |
4515 | needs_setuid = false; | |
4516 | else | |
4517 | needs_setuid = (params->flags & EXEC_APPLY_SANDBOXING) && !(command->flags & (EXEC_COMMAND_FULLY_PRIVILEGED|EXEC_COMMAND_NO_SETUID)); | |
4518 | ||
638fd8cc LP |
4519 | uint64_t capability_ambient_set = context->capability_ambient_set; |
4520 | ||
165a31c0 | 4521 | if (needs_sandboxing) { |
adf769b0 ZJS |
4522 | /* MAC enablement checks need to be done before a new mount ns is created, as they rely on |
4523 | * /sys being present. The actual MAC context application will happen later, as late as | |
4524 | * possible, to avoid impacting our own code paths. */ | |
7f18ef0a | 4525 | |
349cc4a5 | 4526 | #if HAVE_SELINUX |
43b1f709 | 4527 | use_selinux = mac_selinux_use(); |
7f18ef0a | 4528 | #endif |
f9fa32f0 | 4529 | #if ENABLE_SMACK |
43b1f709 | 4530 | use_smack = mac_smack_use(); |
7f18ef0a | 4531 | #endif |
349cc4a5 | 4532 | #if HAVE_APPARMOR |
43b1f709 | 4533 | use_apparmor = mac_apparmor_use(); |
7f18ef0a | 4534 | #endif |
165a31c0 | 4535 | } |
7f18ef0a | 4536 | |
ce932d2d LP |
4537 | if (needs_sandboxing) { |
4538 | int which_failed; | |
4539 | ||
4540 | /* Let's set the resource limits before we call into PAM, so that pam_limits wins over what | |
4541 | * is set here. (See below.) */ | |
4542 | ||
4543 | r = setrlimit_closest_all((const struct rlimit* const *) context->rlimit, &which_failed); | |
4544 | if (r < 0) { | |
4545 | *exit_status = EXIT_LIMITS; | |
4546 | return log_unit_error_errno(unit, r, "Failed to adjust resource limit RLIMIT_%s: %m", rlimit_to_string(which_failed)); | |
4547 | } | |
4548 | } | |
4549 | ||
0af07108 | 4550 | if (needs_setuid && context->pam_name && username) { |
ce932d2d LP |
4551 | /* Let's call into PAM after we set up our own idea of resource limits to that pam_limits |
4552 | * wins here. (See above.) */ | |
4553 | ||
1da37e58 | 4554 | /* All fds passed in the fds array will be closed in the pam child process. */ |
0af07108 ZJS |
4555 | r = setup_pam(context->pam_name, username, uid, gid, context->tty_path, &accum_env, fds, n_fds); |
4556 | if (r < 0) { | |
4557 | *exit_status = EXIT_PAM; | |
4558 | return log_unit_error_errno(unit, r, "Failed to set up PAM session: %m"); | |
165a31c0 | 4559 | } |
ac45f971 | 4560 | |
638fd8cc LP |
4561 | if (ambient_capabilities_supported()) { |
4562 | uint64_t ambient_after_pam; | |
4563 | ||
4564 | /* PAM modules might have set some ambient caps. Query them here and merge them into | |
4565 | * the caps we want to set in the end, so that we don't end up unsetting them. */ | |
4566 | r = capability_get_ambient(&ambient_after_pam); | |
4567 | if (r < 0) { | |
4568 | *exit_status = EXIT_CAPABILITIES; | |
4569 | return log_unit_error_errno(unit, r, "Failed to query ambient caps: %m"); | |
4570 | } | |
4571 | ||
4572 | capability_ambient_set |= ambient_after_pam; | |
4573 | } | |
4574 | ||
0af07108 ZJS |
4575 | ngids_after_pam = getgroups_alloc(&gids_after_pam); |
4576 | if (ngids_after_pam < 0) { | |
4577 | *exit_status = EXIT_MEMORY; | |
4578 | return log_unit_error_errno(unit, ngids_after_pam, "Failed to obtain groups after setting up PAM: %m"); | |
5749f855 | 4579 | } |
b213e1c1 | 4580 | } |
5749f855 | 4581 | |
170d978b | 4582 | if (needs_sandboxing && exec_context_need_unprivileged_private_users(context, params)) { |
5749f855 AZ |
4583 | /* If we're unprivileged, set up the user namespace first to enable use of the other namespaces. |
4584 | * Users with CAP_SYS_ADMIN can set up user namespaces last because they will be able to | |
4585 | * set up the all of the other namespaces (i.e. network, mount, UTS) without a user namespace. */ | |
0af07108 | 4586 | |
0af07108 | 4587 | r = setup_private_users(saved_uid, saved_gid, uid, gid); |
6ef721cb LB |
4588 | /* If it was requested explicitly and we can't set it up, fail early. Otherwise, continue and let |
4589 | * the actual requested operations fail (or silently continue). */ | |
4590 | if (r < 0 && context->private_users) { | |
0af07108 ZJS |
4591 | *exit_status = EXIT_USER; |
4592 | return log_unit_error_errno(unit, r, "Failed to set up user namespacing for unprivileged user: %m"); | |
5749f855 | 4593 | } |
6ef721cb LB |
4594 | if (r < 0) |
4595 | log_unit_info_errno(unit, r, "Failed to set up user namespacing for unprivileged user, ignoring: %m"); | |
4596 | else | |
4597 | userns_set_up = true; | |
5749f855 AZ |
4598 | } |
4599 | ||
28135da3 | 4600 | if (exec_needs_network_namespace(context) && runtime && runtime->shared && runtime->shared->netns_storage_socket[0] >= 0) { |
a8d08f39 | 4601 | |
5a3627e5 LP |
4602 | /* Try to enable network namespacing if network namespacing is available and we have |
4603 | * CAP_NET_ADMIN. We need CAP_NET_ADMIN to be able to configure the loopback device in the | |
4604 | * new network namespace. And if we don't have that, then we could only create a network | |
4605 | * namespace without the ability to set up "lo". Hence gracefully skip things then. */ | |
4606 | if (ns_type_supported(NAMESPACE_NET) && have_effective_cap(CAP_NET_ADMIN) > 0) { | |
28135da3 | 4607 | r = setup_shareable_ns(runtime->shared->netns_storage_socket, CLONE_NEWNET); |
bb44fd07 ZJS |
4608 | if (ERRNO_IS_NEG_PRIVILEGE(r)) |
4609 | log_unit_notice_errno(unit, r, | |
4610 | "PrivateNetwork=yes is configured, but network namespace setup not permitted, proceeding without: %m"); | |
4611 | else if (r < 0) { | |
4612 | *exit_status = EXIT_NETWORK; | |
4613 | return log_unit_error_errno(unit, r, "Failed to set up network namespacing: %m"); | |
6e2d7c4f | 4614 | } |
a8d08f39 LP |
4615 | } else if (context->network_namespace_path) { |
4616 | *exit_status = EXIT_NETWORK; | |
ee00d1e9 ZJS |
4617 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(EOPNOTSUPP), |
4618 | "NetworkNamespacePath= is not supported, refusing."); | |
6e2d7c4f | 4619 | } else |
5a3627e5 | 4620 | log_unit_notice(unit, "PrivateNetwork=yes is configured, but the kernel does not support or we lack privileges for network namespace, proceeding without."); |
d35fbf6b | 4621 | } |
169c1bda | 4622 | |
28135da3 | 4623 | if (exec_needs_ipc_namespace(context) && runtime && runtime->shared && runtime->shared->ipcns_storage_socket[0] >= 0) { |
a70581ff XR |
4624 | |
4625 | if (ns_type_supported(NAMESPACE_IPC)) { | |
28135da3 | 4626 | r = setup_shareable_ns(runtime->shared->ipcns_storage_socket, CLONE_NEWIPC); |
a70581ff XR |
4627 | if (r == -EPERM) |
4628 | log_unit_warning_errno(unit, r, | |
4629 | "PrivateIPC=yes is configured, but IPC namespace setup failed, ignoring: %m"); | |
4630 | else if (r < 0) { | |
4631 | *exit_status = EXIT_NAMESPACE; | |
4632 | return log_unit_error_errno(unit, r, "Failed to set up IPC namespacing: %m"); | |
4633 | } | |
4634 | } else if (context->ipc_namespace_path) { | |
4635 | *exit_status = EXIT_NAMESPACE; | |
4636 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(EOPNOTSUPP), | |
4637 | "IPCNamespacePath= is not supported, refusing."); | |
4638 | } else | |
4639 | log_unit_warning(unit, "PrivateIPC=yes is configured, but the kernel does not support IPC namespaces, ignoring."); | |
4640 | } | |
4641 | ||
ee818b89 | 4642 | if (needs_mount_namespace) { |
7cc5ef5f ZJS |
4643 | _cleanup_free_ char *error_path = NULL; |
4644 | ||
73ff4d48 | 4645 | r = apply_mount_namespace(unit, command->flags, context, params, runtime, memory_pressure_path, &error_path); |
3fbe8dbe LP |
4646 | if (r < 0) { |
4647 | *exit_status = EXIT_NAMESPACE; | |
7cc5ef5f ZJS |
4648 | return log_unit_error_errno(unit, r, "Failed to set up mount namespacing%s%s: %m", |
4649 | error_path ? ": " : "", strempty(error_path)); | |
3fbe8dbe | 4650 | } |
d35fbf6b | 4651 | } |
81a2b7ce | 4652 | |
daf8f72b LP |
4653 | if (needs_sandboxing) { |
4654 | r = apply_protect_hostname(unit, context, exit_status); | |
4655 | if (r < 0) | |
4656 | return r; | |
aecd5ac6 TM |
4657 | } |
4658 | ||
85614c6e SR |
4659 | if (context->memory_ksm >= 0) |
4660 | if (prctl(PR_SET_MEMORY_MERGE, context->memory_ksm) < 0) { | |
4661 | if (ERRNO_IS_NOT_SUPPORTED(errno)) | |
4662 | log_unit_debug_errno(unit, errno, "KSM support not available, ignoring."); | |
4663 | else { | |
4664 | *exit_status = EXIT_KSM; | |
4665 | return log_unit_error_errno(unit, errno, "Failed to set KSM: %m"); | |
4666 | } | |
4667 | } | |
4668 | ||
5749f855 AZ |
4669 | /* Drop groups as early as possible. |
4670 | * This needs to be done after PrivateDevices=y setup as device nodes should be owned by the host's root. | |
4671 | * For non-root in a userns, devices will be owned by the user/group before the group change, and nobody. */ | |
165a31c0 | 4672 | if (needs_setuid) { |
afb11bf1 DG |
4673 | _cleanup_free_ gid_t *gids_to_enforce = NULL; |
4674 | int ngids_to_enforce = 0; | |
4675 | ||
4676 | ngids_to_enforce = merge_gid_lists(supplementary_gids, | |
4677 | ngids, | |
4678 | gids_after_pam, | |
4679 | ngids_after_pam, | |
4680 | &gids_to_enforce); | |
4681 | if (ngids_to_enforce < 0) { | |
4682 | *exit_status = EXIT_MEMORY; | |
4683 | return log_unit_error_errno(unit, | |
4684 | ngids_to_enforce, | |
4685 | "Failed to merge group lists. Group membership might be incorrect: %m"); | |
4686 | } | |
4687 | ||
4688 | r = enforce_groups(gid, gids_to_enforce, ngids_to_enforce); | |
096424d1 LP |
4689 | if (r < 0) { |
4690 | *exit_status = EXIT_GROUP; | |
12145637 | 4691 | return log_unit_error_errno(unit, r, "Changing group credentials failed: %m"); |
096424d1 | 4692 | } |
165a31c0 | 4693 | } |
096424d1 | 4694 | |
5749f855 AZ |
4695 | /* If the user namespace was not set up above, try to do it now. |
4696 | * It's preferred to set up the user namespace later (after all other namespaces) so as not to be | |
d09df6b9 | 4697 | * restricted by rules pertaining to combining user namespaces with other namespaces (e.g. in the |
5749f855 AZ |
4698 | * case of mount namespaces being less privileged when the mount point list is copied from a |
4699 | * different user namespace). */ | |
9008e1ac | 4700 | |
5749f855 AZ |
4701 | if (needs_sandboxing && context->private_users && !userns_set_up) { |
4702 | r = setup_private_users(saved_uid, saved_gid, uid, gid); | |
4703 | if (r < 0) { | |
4704 | *exit_status = EXIT_USER; | |
4705 | return log_unit_error_errno(unit, r, "Failed to set up user namespacing: %m"); | |
d251207d LP |
4706 | } |
4707 | } | |
4708 | ||
9f71ba8d ZJS |
4709 | /* Now that the mount namespace has been set up and privileges adjusted, let's look for the thing we |
4710 | * shall execute. */ | |
4711 | ||
4712 | _cleanup_free_ char *executable = NULL; | |
254d1313 | 4713 | _cleanup_close_ int executable_fd = -EBADF; |
8c35c10d | 4714 | r = find_executable_full(command->path, /* root= */ NULL, context->exec_search_path, false, &executable, &executable_fd); |
9f71ba8d ZJS |
4715 | if (r < 0) { |
4716 | if (r != -ENOMEM && (command->flags & EXEC_COMMAND_IGNORE_FAILURE)) { | |
c2503e35 RH |
4717 | log_unit_struct_errno(unit, LOG_INFO, r, |
4718 | "MESSAGE_ID=" SD_MESSAGE_SPAWN_FAILED_STR, | |
4719 | LOG_UNIT_INVOCATION_ID(unit), | |
4720 | LOG_UNIT_MESSAGE(unit, "Executable %s missing, skipping: %m", | |
4721 | command->path), | |
4722 | "EXECUTABLE=%s", command->path); | |
5fa01ac0 | 4723 | *exit_status = EXIT_SUCCESS; |
9f71ba8d ZJS |
4724 | return 0; |
4725 | } | |
4726 | ||
4727 | *exit_status = EXIT_EXEC; | |
c2503e35 RH |
4728 | return log_unit_struct_errno(unit, LOG_INFO, r, |
4729 | "MESSAGE_ID=" SD_MESSAGE_SPAWN_FAILED_STR, | |
4730 | LOG_UNIT_INVOCATION_ID(unit), | |
4731 | LOG_UNIT_MESSAGE(unit, "Failed to locate executable %s: %m", | |
4732 | command->path), | |
4733 | "EXECUTABLE=%s", command->path); | |
9f71ba8d ZJS |
4734 | } |
4735 | ||
b83d5050 ZJS |
4736 | r = add_shifted_fd(keep_fds, ELEMENTSOF(keep_fds), &n_keep_fds, executable_fd, &executable_fd); |
4737 | if (r < 0) { | |
4738 | *exit_status = EXIT_FDS; | |
4739 | return log_unit_error_errno(unit, r, "Failed to shift fd and set FD_CLOEXEC: %m"); | |
4740 | } | |
4741 | ||
9f71ba8d | 4742 | #if HAVE_SELINUX |
49590d67 | 4743 | if (needs_sandboxing && use_selinux && params->selinux_context_net) { |
254d1313 | 4744 | int fd = -EBADF; |
49590d67 MS |
4745 | |
4746 | if (socket_fd >= 0) | |
4747 | fd = socket_fd; | |
4748 | else if (params->n_socket_fds == 1) | |
4749 | /* If stdin is not connected to a socket but we are triggered by exactly one socket unit then we | |
4750 | * use context from that fd to compute the label. */ | |
4751 | fd = params->fds[0]; | |
4752 | ||
4753 | if (fd >= 0) { | |
4754 | r = mac_selinux_get_child_mls_label(fd, executable, context->selinux_context, &mac_selinux_context_net); | |
006d1864 TM |
4755 | if (r < 0) { |
4756 | if (!context->selinux_context_ignore) { | |
4757 | *exit_status = EXIT_SELINUX_CONTEXT; | |
4758 | return log_unit_error_errno(unit, r, "Failed to determine SELinux context: %m"); | |
4759 | } | |
4760 | log_unit_debug_errno(unit, r, "Failed to determine SELinux context, ignoring: %m"); | |
49590d67 | 4761 | } |
9f71ba8d ZJS |
4762 | } |
4763 | } | |
4764 | #endif | |
4765 | ||
4a055e5a ZJS |
4766 | /* We repeat the fd closing here, to make sure that nothing is leaked from the PAM modules. Note that |
4767 | * we are more aggressive this time, since we don't need socket_fd and the netns and ipcns fds any | |
4768 | * more. We do keep exec_fd however, if we have it, since we need to keep it open until the final | |
4769 | * execve(). */ | |
5686391b | 4770 | |
1da37e58 | 4771 | r = close_all_fds(keep_fds, n_keep_fds); |
ff0af2a1 LP |
4772 | if (r >= 0) |
4773 | r = shift_fds(fds, n_fds); | |
4774 | if (r >= 0) | |
cd48e23f | 4775 | r = flags_fds(fds, n_socket_fds, n_fds, context->non_blocking); |
ff0af2a1 LP |
4776 | if (r < 0) { |
4777 | *exit_status = EXIT_FDS; | |
12145637 | 4778 | return log_unit_error_errno(unit, r, "Failed to adjust passed file descriptors: %m"); |
d35fbf6b | 4779 | } |
e66cf1a3 | 4780 | |
5686391b LP |
4781 | /* At this point, the fds we want to pass to the program are all ready and set up, with O_CLOEXEC turned off |
4782 | * and at the right fd numbers. The are no other fds open, with one exception: the exec_fd if it is defined, | |
4783 | * and it has O_CLOEXEC set, after all we want it to be closed by the execve(), so that our parent knows we | |
4784 | * came this far. */ | |
4785 | ||
165a31c0 | 4786 | secure_bits = context->secure_bits; |
e66cf1a3 | 4787 | |
165a31c0 LP |
4788 | if (needs_sandboxing) { |
4789 | uint64_t bset; | |
e66cf1a3 | 4790 | |
4a055e5a ZJS |
4791 | /* Set the RTPRIO resource limit to 0, but only if nothing else was explicitly requested. |
4792 | * (Note this is placed after the general resource limit initialization, see above, in order | |
4793 | * to take precedence.) */ | |
f4170c67 LP |
4794 | if (context->restrict_realtime && !context->rlimit[RLIMIT_RTPRIO]) { |
4795 | if (setrlimit(RLIMIT_RTPRIO, &RLIMIT_MAKE_CONST(0)) < 0) { | |
4796 | *exit_status = EXIT_LIMITS; | |
12145637 | 4797 | return log_unit_error_errno(unit, errno, "Failed to adjust RLIMIT_RTPRIO resource limit: %m"); |
f4170c67 LP |
4798 | } |
4799 | } | |
4800 | ||
37ac2744 JB |
4801 | #if ENABLE_SMACK |
4802 | /* LSM Smack needs the capability CAP_MAC_ADMIN to change the current execution security context of the | |
4803 | * process. This is the latest place before dropping capabilities. Other MAC context are set later. */ | |
4804 | if (use_smack) { | |
aa5ae971 | 4805 | r = setup_smack(unit->manager, context, executable_fd); |
29ff6247 | 4806 | if (r < 0 && !context->smack_process_label_ignore) { |
37ac2744 JB |
4807 | *exit_status = EXIT_SMACK_PROCESS_LABEL; |
4808 | return log_unit_error_errno(unit, r, "Failed to set SMACK process label: %m"); | |
4809 | } | |
4810 | } | |
4811 | #endif | |
4812 | ||
165a31c0 LP |
4813 | bset = context->capability_bounding_set; |
4814 | /* If the ambient caps hack is enabled (which means the kernel can't do them, and the user asked for | |
4815 | * our magic fallback), then let's add some extra caps, so that the service can drop privs of its own, | |
4816 | * instead of us doing that */ | |
4817 | if (needs_ambient_hack) | |
4818 | bset |= (UINT64_C(1) << CAP_SETPCAP) | | |
4819 | (UINT64_C(1) << CAP_SETUID) | | |
4820 | (UINT64_C(1) << CAP_SETGID); | |
4821 | ||
4822 | if (!cap_test_all(bset)) { | |
638fd8cc | 4823 | r = capability_bounding_set_drop(bset, /* right_now= */ false); |
ff0af2a1 LP |
4824 | if (r < 0) { |
4825 | *exit_status = EXIT_CAPABILITIES; | |
12145637 | 4826 | return log_unit_error_errno(unit, r, "Failed to drop capabilities: %m"); |
3b8bddde | 4827 | } |
4c2630eb | 4828 | } |
3b8bddde | 4829 | |
16fcb191 TK |
4830 | /* Ambient capabilities are cleared during setresuid() (in enforce_user()) even with |
4831 | * keep-caps set. | |
a954b249 LP |
4832 | * |
4833 | * To be able to raise the ambient capabilities after setresuid() they have to be added to | |
4834 | * the inherited set and keep caps has to be set (done in enforce_user()). After setresuid() | |
4835 | * the ambient capabilities can be raised as they are present in the permitted and | |
4836 | * inhertiable set. However it is possible that someone wants to set ambient capabilities | |
4837 | * without changing the user, so we also set the ambient capabilities here. | |
4838 | * | |
4839 | * The requested ambient capabilities are raised in the inheritable set if the second | |
4840 | * argument is true. */ | |
943800f4 | 4841 | if (!needs_ambient_hack) { |
638fd8cc | 4842 | r = capability_ambient_set_apply(capability_ambient_set, /* also_inherit= */ true); |
755d4b67 IP |
4843 | if (r < 0) { |
4844 | *exit_status = EXIT_CAPABILITIES; | |
12145637 | 4845 | return log_unit_error_errno(unit, r, "Failed to apply ambient capabilities (before UID change): %m"); |
755d4b67 | 4846 | } |
755d4b67 | 4847 | } |
165a31c0 | 4848 | } |
755d4b67 | 4849 | |
fa97f630 | 4850 | /* chroot to root directory first, before we lose the ability to chroot */ |
9c0c6701 | 4851 | r = apply_root_directory(context, params, runtime, needs_mount_namespace, exit_status); |
fa97f630 JB |
4852 | if (r < 0) |
4853 | return log_unit_error_errno(unit, r, "Chrooting to the requested root directory failed: %m"); | |
4854 | ||
165a31c0 | 4855 | if (needs_setuid) { |
08f67696 | 4856 | if (uid_is_valid(uid)) { |
638fd8cc | 4857 | r = enforce_user(context, uid, capability_ambient_set); |
ff0af2a1 LP |
4858 | if (r < 0) { |
4859 | *exit_status = EXIT_USER; | |
12145637 | 4860 | return log_unit_error_errno(unit, r, "Failed to change UID to " UID_FMT ": %m", uid); |
5b6319dc | 4861 | } |
165a31c0 | 4862 | |
638fd8cc | 4863 | if (!needs_ambient_hack && capability_ambient_set != 0) { |
755d4b67 | 4864 | |
16fcb191 | 4865 | /* Raise the ambient capabilities after user change. */ |
638fd8cc | 4866 | r = capability_ambient_set_apply(capability_ambient_set, /* also_inherit= */ false); |
755d4b67 IP |
4867 | if (r < 0) { |
4868 | *exit_status = EXIT_CAPABILITIES; | |
12145637 | 4869 | return log_unit_error_errno(unit, r, "Failed to apply ambient capabilities (after UID change): %m"); |
755d4b67 | 4870 | } |
755d4b67 | 4871 | } |
5b6319dc | 4872 | } |
165a31c0 | 4873 | } |
d35fbf6b | 4874 | |
56ef8db9 JB |
4875 | /* Apply working directory here, because the working directory might be on NFS and only the user running |
4876 | * this service might have the correct privilege to change to the working directory */ | |
9c0c6701 | 4877 | r = apply_working_directory(context, params, runtime, home, exit_status); |
56ef8db9 JB |
4878 | if (r < 0) |
4879 | return log_unit_error_errno(unit, r, "Changing to the requested working directory failed: %m"); | |
4880 | ||
165a31c0 | 4881 | if (needs_sandboxing) { |
37ac2744 | 4882 | /* Apply other MAC contexts late, but before seccomp syscall filtering, as those should really be last to |
5cd9cd35 LP |
4883 | * influence our own codepaths as little as possible. Moreover, applying MAC contexts usually requires |
4884 | * syscalls that are subject to seccomp filtering, hence should probably be applied before the syscalls | |
4885 | * are restricted. */ | |
4886 | ||
349cc4a5 | 4887 | #if HAVE_SELINUX |
43b1f709 | 4888 | if (use_selinux) { |
5cd9cd35 LP |
4889 | char *exec_context = mac_selinux_context_net ?: context->selinux_context; |
4890 | ||
4891 | if (exec_context) { | |
4892 | r = setexeccon(exec_context); | |
006d1864 TM |
4893 | if (r < 0) { |
4894 | if (!context->selinux_context_ignore) { | |
4895 | *exit_status = EXIT_SELINUX_CONTEXT; | |
4896 | return log_unit_error_errno(unit, r, "Failed to change SELinux context to %s: %m", exec_context); | |
4897 | } | |
4898 | log_unit_debug_errno(unit, r, "Failed to change SELinux context to %s, ignoring: %m", exec_context); | |
5cd9cd35 LP |
4899 | } |
4900 | } | |
4901 | } | |
4902 | #endif | |
4903 | ||
349cc4a5 | 4904 | #if HAVE_APPARMOR |
43b1f709 | 4905 | if (use_apparmor && context->apparmor_profile) { |
5cd9cd35 LP |
4906 | r = aa_change_onexec(context->apparmor_profile); |
4907 | if (r < 0 && !context->apparmor_profile_ignore) { | |
4908 | *exit_status = EXIT_APPARMOR_PROFILE; | |
12145637 | 4909 | return log_unit_error_errno(unit, errno, "Failed to prepare AppArmor profile change to %s: %m", context->apparmor_profile); |
5cd9cd35 LP |
4910 | } |
4911 | } | |
4912 | #endif | |
4913 | ||
a954b249 LP |
4914 | /* PR_GET_SECUREBITS is not privileged, while PR_SET_SECUREBITS is. So to suppress potential |
4915 | * EPERMs we'll try not to call PR_SET_SECUREBITS unless necessary. Setting securebits | |
4916 | * requires CAP_SETPCAP. */ | |
dbdc4098 | 4917 | if (prctl(PR_GET_SECUREBITS) != secure_bits) { |
69e3234d | 4918 | /* CAP_SETPCAP is required to set securebits. This capability is raised into the |
dbdc4098 | 4919 | * effective set here. |
a954b249 LP |
4920 | * |
4921 | * The effective set is overwritten during execve() with the following values: | |
4922 | * | |
dbdc4098 | 4923 | * - ambient set (for non-root processes) |
a954b249 | 4924 | * |
dbdc4098 TK |
4925 | * - (inheritable | bounding) set for root processes) |
4926 | * | |
4927 | * Hence there is no security impact to raise it in the effective set before execve | |
4928 | */ | |
a954b249 | 4929 | r = capability_gain_cap_setpcap(/* return_caps= */ NULL); |
dbdc4098 TK |
4930 | if (r < 0) { |
4931 | *exit_status = EXIT_CAPABILITIES; | |
4932 | return log_unit_error_errno(unit, r, "Failed to gain CAP_SETPCAP for setting secure bits"); | |
4933 | } | |
755d4b67 | 4934 | if (prctl(PR_SET_SECUREBITS, secure_bits) < 0) { |
ff0af2a1 | 4935 | *exit_status = EXIT_SECUREBITS; |
12145637 | 4936 | return log_unit_error_errno(unit, errno, "Failed to set process secure bits: %m"); |
ff01d048 | 4937 | } |
dbdc4098 | 4938 | } |
5b6319dc | 4939 | |
59eeb84b | 4940 | if (context_has_no_new_privileges(context)) |
d35fbf6b | 4941 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { |
ff0af2a1 | 4942 | *exit_status = EXIT_NO_NEW_PRIVILEGES; |
12145637 | 4943 | return log_unit_error_errno(unit, errno, "Failed to disable new privileges: %m"); |
d35fbf6b DM |
4944 | } |
4945 | ||
349cc4a5 | 4946 | #if HAVE_SECCOMP |
469830d1 LP |
4947 | r = apply_address_families(unit, context); |
4948 | if (r < 0) { | |
4949 | *exit_status = EXIT_ADDRESS_FAMILIES; | |
12145637 | 4950 | return log_unit_error_errno(unit, r, "Failed to restrict address families: %m"); |
4c2630eb | 4951 | } |
04aa0cb9 | 4952 | |
469830d1 LP |
4953 | r = apply_memory_deny_write_execute(unit, context); |
4954 | if (r < 0) { | |
4955 | *exit_status = EXIT_SECCOMP; | |
12145637 | 4956 | return log_unit_error_errno(unit, r, "Failed to disable writing to executable memory: %m"); |
f3e43635 | 4957 | } |
f4170c67 | 4958 | |
469830d1 LP |
4959 | r = apply_restrict_realtime(unit, context); |
4960 | if (r < 0) { | |
4961 | *exit_status = EXIT_SECCOMP; | |
12145637 | 4962 | return log_unit_error_errno(unit, r, "Failed to apply realtime restrictions: %m"); |
f4170c67 LP |
4963 | } |
4964 | ||
f69567cb LP |
4965 | r = apply_restrict_suid_sgid(unit, context); |
4966 | if (r < 0) { | |
4967 | *exit_status = EXIT_SECCOMP; | |
4968 | return log_unit_error_errno(unit, r, "Failed to apply SUID/SGID restrictions: %m"); | |
4969 | } | |
4970 | ||
add00535 LP |
4971 | r = apply_restrict_namespaces(unit, context); |
4972 | if (r < 0) { | |
4973 | *exit_status = EXIT_SECCOMP; | |
12145637 | 4974 | return log_unit_error_errno(unit, r, "Failed to apply namespace restrictions: %m"); |
add00535 LP |
4975 | } |
4976 | ||
469830d1 LP |
4977 | r = apply_protect_sysctl(unit, context); |
4978 | if (r < 0) { | |
4979 | *exit_status = EXIT_SECCOMP; | |
12145637 | 4980 | return log_unit_error_errno(unit, r, "Failed to apply sysctl restrictions: %m"); |
502d704e DH |
4981 | } |
4982 | ||
469830d1 LP |
4983 | r = apply_protect_kernel_modules(unit, context); |
4984 | if (r < 0) { | |
4985 | *exit_status = EXIT_SECCOMP; | |
12145637 | 4986 | return log_unit_error_errno(unit, r, "Failed to apply module loading restrictions: %m"); |
59eeb84b LP |
4987 | } |
4988 | ||
84703040 KK |
4989 | r = apply_protect_kernel_logs(unit, context); |
4990 | if (r < 0) { | |
4991 | *exit_status = EXIT_SECCOMP; | |
4992 | return log_unit_error_errno(unit, r, "Failed to apply kernel log restrictions: %m"); | |
4993 | } | |
4994 | ||
fc64760d KK |
4995 | r = apply_protect_clock(unit, context); |
4996 | if (r < 0) { | |
4997 | *exit_status = EXIT_SECCOMP; | |
4998 | return log_unit_error_errno(unit, r, "Failed to apply clock restrictions: %m"); | |
4999 | } | |
5000 | ||
469830d1 LP |
5001 | r = apply_private_devices(unit, context); |
5002 | if (r < 0) { | |
5003 | *exit_status = EXIT_SECCOMP; | |
12145637 | 5004 | return log_unit_error_errno(unit, r, "Failed to set up private devices: %m"); |
469830d1 LP |
5005 | } |
5006 | ||
5007 | r = apply_syscall_archs(unit, context); | |
5008 | if (r < 0) { | |
5009 | *exit_status = EXIT_SECCOMP; | |
12145637 | 5010 | return log_unit_error_errno(unit, r, "Failed to apply syscall architecture restrictions: %m"); |
ba128bb8 LP |
5011 | } |
5012 | ||
78e864e5 TM |
5013 | r = apply_lock_personality(unit, context); |
5014 | if (r < 0) { | |
5015 | *exit_status = EXIT_SECCOMP; | |
12145637 | 5016 | return log_unit_error_errno(unit, r, "Failed to lock personalities: %m"); |
78e864e5 TM |
5017 | } |
5018 | ||
9df2cdd8 TM |
5019 | r = apply_syscall_log(unit, context); |
5020 | if (r < 0) { | |
5021 | *exit_status = EXIT_SECCOMP; | |
5022 | return log_unit_error_errno(unit, r, "Failed to apply system call log filters: %m"); | |
5023 | } | |
5024 | ||
5cd9cd35 LP |
5025 | /* This really should remain the last step before the execve(), to make sure our own code is unaffected |
5026 | * by the filter as little as possible. */ | |
165a31c0 | 5027 | r = apply_syscall_filter(unit, context, needs_ambient_hack); |
469830d1 LP |
5028 | if (r < 0) { |
5029 | *exit_status = EXIT_SECCOMP; | |
12145637 | 5030 | return log_unit_error_errno(unit, r, "Failed to apply system call filters: %m"); |
d35fbf6b DM |
5031 | } |
5032 | #endif | |
b1994387 ILG |
5033 | |
5034 | #if HAVE_LIBBPF | |
5035 | r = apply_restrict_filesystems(unit, context); | |
5036 | if (r < 0) { | |
5037 | *exit_status = EXIT_BPF; | |
5038 | return log_unit_error_errno(unit, r, "Failed to restrict filesystems: %m"); | |
5039 | } | |
5040 | #endif | |
5041 | ||
d35fbf6b | 5042 | } |
034c6ed7 | 5043 | |
00819cc1 LP |
5044 | if (!strv_isempty(context->unset_environment)) { |
5045 | char **ee = NULL; | |
5046 | ||
5047 | ee = strv_env_delete(accum_env, 1, context->unset_environment); | |
5048 | if (!ee) { | |
5049 | *exit_status = EXIT_MEMORY; | |
12145637 | 5050 | return log_oom(); |
00819cc1 LP |
5051 | } |
5052 | ||
130d3d22 | 5053 | strv_free_and_replace(accum_env, ee); |
00819cc1 LP |
5054 | } |
5055 | ||
7ca69792 | 5056 | if (!FLAGS_SET(command->flags, EXEC_COMMAND_NO_ENV_EXPAND)) { |
f331434d LP |
5057 | _cleanup_strv_free_ char **unset_variables = NULL, **bad_variables = NULL; |
5058 | ||
5059 | r = replace_env_argv(command->argv, accum_env, &replaced_argv, &unset_variables, &bad_variables); | |
5060 | if (r < 0) { | |
7ca69792 | 5061 | *exit_status = EXIT_MEMORY; |
f331434d | 5062 | return log_unit_error_errno(unit, r, "Failed to replace environment variables: %m"); |
7ca69792 AZ |
5063 | } |
5064 | final_argv = replaced_argv; | |
f331434d LP |
5065 | |
5066 | if (!strv_isempty(unset_variables)) { | |
5067 | _cleanup_free_ char *ju = strv_join(unset_variables, ", "); | |
5068 | log_unit_warning(unit, "Referenced but unset environment variable evaluates to an empty string: %s", strna(ju)); | |
5069 | } | |
5070 | ||
5071 | if (!strv_isempty(bad_variables)) { | |
5072 | _cleanup_free_ char *jb = strv_join(bad_variables, ", "); | |
5073 | log_unit_warning(unit, "Invalid environment variable name evaluates to an empty string: %s", strna(jb));; | |
5074 | } | |
7ca69792 AZ |
5075 | } else |
5076 | final_argv = command->argv; | |
034c6ed7 | 5077 | |
3ff67ec4 | 5078 | log_command_line(unit, "Executing", executable, final_argv); |
dd305ec9 | 5079 | |
5686391b LP |
5080 | if (exec_fd >= 0) { |
5081 | uint8_t hot = 1; | |
5082 | ||
5083 | /* We have finished with all our initializations. Let's now let the manager know that. From this point | |
5084 | * on, if the manager sees POLLHUP on the exec_fd, then execve() was successful. */ | |
5085 | ||
5086 | if (write(exec_fd, &hot, sizeof(hot)) < 0) { | |
5087 | *exit_status = EXIT_EXEC; | |
5088 | return log_unit_error_errno(unit, errno, "Failed to enable exec_fd: %m"); | |
5089 | } | |
5090 | } | |
5091 | ||
a6d9111c | 5092 | r = fexecve_or_execve(executable_fd, executable, final_argv, accum_env); |
5686391b LP |
5093 | |
5094 | if (exec_fd >= 0) { | |
5095 | uint8_t hot = 0; | |
5096 | ||
5097 | /* The execve() failed. This means the exec_fd is still open. Which means we need to tell the manager | |
5098 | * that POLLHUP on it no longer means execve() succeeded. */ | |
5099 | ||
5100 | if (write(exec_fd, &hot, sizeof(hot)) < 0) { | |
5101 | *exit_status = EXIT_EXEC; | |
5102 | return log_unit_error_errno(unit, errno, "Failed to disable exec_fd: %m"); | |
5103 | } | |
5104 | } | |
12145637 | 5105 | |
ff0af2a1 | 5106 | *exit_status = EXIT_EXEC; |
9f71ba8d | 5107 | return log_unit_error_errno(unit, r, "Failed to execute %s: %m", executable); |
d35fbf6b | 5108 | } |
81a2b7ce | 5109 | |
34cf6c43 | 5110 | static int exec_context_load_environment(const Unit *unit, const ExecContext *c, char ***l); |
2caa38e9 | 5111 | static int exec_context_named_iofds(const ExecContext *c, const ExecParameters *p, int named_iofds[static 3]); |
34cf6c43 | 5112 | |
f2341e0a LP |
5113 | int exec_spawn(Unit *unit, |
5114 | ExecCommand *command, | |
d35fbf6b DM |
5115 | const ExecContext *context, |
5116 | const ExecParameters *params, | |
28135da3 | 5117 | ExecRuntime *runtime, |
6bb00842 | 5118 | const CGroupContext *cgroup_context, |
d35fbf6b | 5119 | pid_t *ret) { |
8351ceae | 5120 | |
ee39ca20 | 5121 | int socket_fd, r, named_iofds[3] = { -1, -1, -1 }, *fds = NULL; |
78f93209 | 5122 | _cleanup_free_ char *subcgroup_path = NULL; |
d35fbf6b | 5123 | _cleanup_strv_free_ char **files_env = NULL; |
da6053d0 | 5124 | size_t n_storage_fds = 0, n_socket_fds = 0; |
d35fbf6b | 5125 | pid_t pid; |
8351ceae | 5126 | |
f2341e0a | 5127 | assert(unit); |
d35fbf6b DM |
5128 | assert(command); |
5129 | assert(context); | |
5130 | assert(ret); | |
5131 | assert(params); | |
25b583d7 | 5132 | assert(params->fds || (params->n_socket_fds + params->n_storage_fds <= 0)); |
4298d0b5 | 5133 | |
4b2af439 DDM |
5134 | LOG_CONTEXT_PUSH_UNIT(unit); |
5135 | ||
d35fbf6b DM |
5136 | if (context->std_input == EXEC_INPUT_SOCKET || |
5137 | context->std_output == EXEC_OUTPUT_SOCKET || | |
5138 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
17df7223 | 5139 | |
d85ff944 YW |
5140 | if (params->n_socket_fds > 1) |
5141 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(EINVAL), "Got more than one socket."); | |
eef65bf3 | 5142 | |
d85ff944 YW |
5143 | if (params->n_socket_fds == 0) |
5144 | return log_unit_error_errno(unit, SYNTHETIC_ERRNO(EINVAL), "Got no socket."); | |
488ab41c | 5145 | |
d35fbf6b DM |
5146 | socket_fd = params->fds[0]; |
5147 | } else { | |
254d1313 | 5148 | socket_fd = -EBADF; |
d35fbf6b | 5149 | fds = params->fds; |
9b141911 | 5150 | n_socket_fds = params->n_socket_fds; |
25b583d7 | 5151 | n_storage_fds = params->n_storage_fds; |
d35fbf6b | 5152 | } |
94f04347 | 5153 | |
34cf6c43 | 5154 | r = exec_context_named_iofds(context, params, named_iofds); |
52c239d7 LB |
5155 | if (r < 0) |
5156 | return log_unit_error_errno(unit, r, "Failed to load a named file descriptor: %m"); | |
5157 | ||
f2341e0a | 5158 | r = exec_context_load_environment(unit, context, &files_env); |
ff0af2a1 | 5159 | if (r < 0) |
f2341e0a | 5160 | return log_unit_error_errno(unit, r, "Failed to load environment files: %m"); |
034c6ed7 | 5161 | |
9f71ba8d ZJS |
5162 | /* Fork with up-to-date SELinux label database, so the child inherits the up-to-date db |
5163 | and, until the next SELinux policy changes, we save further reloads in future children. */ | |
2df2152c CG |
5164 | mac_selinux_maybe_reload(); |
5165 | ||
3ff67ec4 ZJS |
5166 | /* We won't know the real executable path until we create the mount namespace in the child, but we |
5167 | want to log from the parent, so we use the possibly inaccurate path here. */ | |
5168 | log_command_line(unit, "About to execute", command->path, command->argv); | |
12145637 | 5169 | |
78f93209 | 5170 | if (params->cgroup_path) { |
a8b993dc | 5171 | r = exec_parameters_get_cgroup_path(params, cgroup_context, &subcgroup_path); |
78f93209 LP |
5172 | if (r < 0) |
5173 | return log_unit_error_errno(unit, r, "Failed to acquire subcgroup path: %m"); | |
18c1e481 LP |
5174 | if (r > 0) { |
5175 | /* If there's a subcgroup, then let's create it here now (the main cgroup was already | |
5176 | * realized by the unit logic) */ | |
5177 | ||
78f93209 LP |
5178 | r = cg_create(SYSTEMD_CGROUP_CONTROLLER, subcgroup_path); |
5179 | if (r < 0) | |
a8b993dc | 5180 | return log_unit_error_errno(unit, r, "Failed to create subcgroup '%s': %m", subcgroup_path); |
78f93209 LP |
5181 | } |
5182 | } | |
5183 | ||
d35fbf6b DM |
5184 | pid = fork(); |
5185 | if (pid < 0) | |
74129a12 | 5186 | return log_unit_error_errno(unit, errno, "Failed to fork: %m"); |
d35fbf6b DM |
5187 | |
5188 | if (pid == 0) { | |
5fa01ac0 | 5189 | int exit_status; |
ff0af2a1 | 5190 | |
f2341e0a LP |
5191 | r = exec_child(unit, |
5192 | command, | |
ff0af2a1 LP |
5193 | context, |
5194 | params, | |
5195 | runtime, | |
6bb00842 | 5196 | cgroup_context, |
ff0af2a1 | 5197 | socket_fd, |
52c239d7 | 5198 | named_iofds, |
4c47affc | 5199 | fds, |
9b141911 | 5200 | n_socket_fds, |
25b583d7 | 5201 | n_storage_fds, |
ff0af2a1 | 5202 | files_env, |
00d9ef85 | 5203 | unit->manager->user_lookup_fds[1], |
12145637 LP |
5204 | &exit_status); |
5205 | ||
e1714f02 | 5206 | if (r < 0) { |
5fa01ac0 ZJS |
5207 | const char *status = ASSERT_PTR( |
5208 | exit_status_to_string(exit_status, EXIT_STATUS_LIBC | EXIT_STATUS_SYSTEMD)); | |
e1714f02 | 5209 | |
c2503e35 RH |
5210 | log_unit_struct_errno(unit, LOG_ERR, r, |
5211 | "MESSAGE_ID=" SD_MESSAGE_SPAWN_FAILED_STR, | |
5212 | LOG_UNIT_INVOCATION_ID(unit), | |
5213 | LOG_UNIT_MESSAGE(unit, "Failed at step %s spawning %s: %m", | |
5214 | status, command->path), | |
5215 | "EXECUTABLE=%s", command->path); | |
5fa01ac0 ZJS |
5216 | } else |
5217 | assert(exit_status == EXIT_SUCCESS); | |
4c2630eb | 5218 | |
ff0af2a1 | 5219 | _exit(exit_status); |
034c6ed7 LP |
5220 | } |
5221 | ||
f2341e0a | 5222 | log_unit_debug(unit, "Forked %s as "PID_FMT, command->path, pid); |
23635a85 | 5223 | |
78f93209 LP |
5224 | /* We add the new process to the cgroup both in the child (so that we can be sure that no user code is ever |
5225 | * executed outside of the cgroup) and in the parent (so that we can be sure that when we kill the cgroup the | |
5226 | * process will be killed too). */ | |
5227 | if (subcgroup_path) | |
5228 | (void) cg_attach(SYSTEMD_CGROUP_CONTROLLER, subcgroup_path, pid); | |
2da3263a | 5229 | |
b58b4116 | 5230 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 5231 | |
034c6ed7 | 5232 | *ret = pid; |
5cb5a6ff LP |
5233 | return 0; |
5234 | } | |
5235 | ||
034c6ed7 LP |
5236 | void exec_context_init(ExecContext *c) { |
5237 | assert(c); | |
5238 | ||
4c12626c | 5239 | c->umask = 0022; |
0692548c | 5240 | c->ioprio = IOPRIO_DEFAULT_CLASS_AND_PRIO; |
94f04347 | 5241 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 5242 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 5243 | c->syslog_level_prefix = true; |
353e12c2 | 5244 | c->ignore_sigpipe = true; |
3a43da28 | 5245 | c->timer_slack_nsec = NSEC_INFINITY; |
050f7277 | 5246 | c->personality = PERSONALITY_INVALID; |
5b10116e ZJS |
5247 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) |
5248 | c->directories[t].mode = 0755; | |
12213aed | 5249 | c->timeout_clean_usec = USEC_INFINITY; |
3fd5190b | 5250 | c->capability_bounding_set = CAP_MASK_UNSET; |
aa9d574d YW |
5251 | assert_cc(NAMESPACE_FLAGS_INITIAL != NAMESPACE_FLAGS_ALL); |
5252 | c->restrict_namespaces = NAMESPACE_FLAGS_INITIAL; | |
d3070fbd | 5253 | c->log_level_max = -1; |
005bfaf1 TM |
5254 | #if HAVE_SECCOMP |
5255 | c->syscall_errno = SECCOMP_ERROR_NUMBER_KILL; | |
5256 | #endif | |
51462135 DDM |
5257 | c->tty_rows = UINT_MAX; |
5258 | c->tty_cols = UINT_MAX; | |
b070c7c0 | 5259 | numa_policy_reset(&c->numa_policy); |
24002121 | 5260 | c->private_mounts = -1; |
85614c6e | 5261 | c->memory_ksm = -1; |
034c6ed7 LP |
5262 | } |
5263 | ||
613b411c | 5264 | void exec_context_done(ExecContext *c) { |
5cb5a6ff LP |
5265 | assert(c); |
5266 | ||
6796073e LP |
5267 | c->environment = strv_free(c->environment); |
5268 | c->environment_files = strv_free(c->environment_files); | |
b4c14404 | 5269 | c->pass_environment = strv_free(c->pass_environment); |
00819cc1 | 5270 | c->unset_environment = strv_free(c->unset_environment); |
8c7be95e | 5271 | |
31ce987c | 5272 | rlimit_free_all(c->rlimit); |
034c6ed7 | 5273 | |
5b10116e | 5274 | for (size_t l = 0; l < 3; l++) { |
52c239d7 | 5275 | c->stdio_fdname[l] = mfree(c->stdio_fdname[l]); |
2038c3f5 LP |
5276 | c->stdio_file[l] = mfree(c->stdio_file[l]); |
5277 | } | |
52c239d7 | 5278 | |
a1e58e8e LP |
5279 | c->working_directory = mfree(c->working_directory); |
5280 | c->root_directory = mfree(c->root_directory); | |
915e6d16 | 5281 | c->root_image = mfree(c->root_image); |
18d73705 | 5282 | c->root_image_options = mount_options_free_all(c->root_image_options); |
0389f4fa LB |
5283 | c->root_hash = mfree(c->root_hash); |
5284 | c->root_hash_size = 0; | |
5285 | c->root_hash_path = mfree(c->root_hash_path); | |
d4d55b0d LB |
5286 | c->root_hash_sig = mfree(c->root_hash_sig); |
5287 | c->root_hash_sig_size = 0; | |
5288 | c->root_hash_sig_path = mfree(c->root_hash_sig_path); | |
0389f4fa | 5289 | c->root_verity = mfree(c->root_verity); |
93f59701 | 5290 | c->extension_images = mount_image_free_many(c->extension_images, &c->n_extension_images); |
a07b9926 | 5291 | c->extension_directories = strv_free(c->extension_directories); |
a1e58e8e LP |
5292 | c->tty_path = mfree(c->tty_path); |
5293 | c->syslog_identifier = mfree(c->syslog_identifier); | |
5294 | c->user = mfree(c->user); | |
5295 | c->group = mfree(c->group); | |
034c6ed7 | 5296 | |
6796073e | 5297 | c->supplementary_groups = strv_free(c->supplementary_groups); |
94f04347 | 5298 | |
a1e58e8e | 5299 | c->pam_name = mfree(c->pam_name); |
5b6319dc | 5300 | |
2a624c36 AP |
5301 | c->read_only_paths = strv_free(c->read_only_paths); |
5302 | c->read_write_paths = strv_free(c->read_write_paths); | |
5303 | c->inaccessible_paths = strv_free(c->inaccessible_paths); | |
ddc155b2 TM |
5304 | c->exec_paths = strv_free(c->exec_paths); |
5305 | c->no_exec_paths = strv_free(c->no_exec_paths); | |
8c35c10d | 5306 | c->exec_search_path = strv_free(c->exec_search_path); |
82c121a4 | 5307 | |
d2d6c096 | 5308 | bind_mount_free_many(c->bind_mounts, c->n_bind_mounts); |
8e06d57c YW |
5309 | c->bind_mounts = NULL; |
5310 | c->n_bind_mounts = 0; | |
2abd4e38 YW |
5311 | temporary_filesystem_free_many(c->temporary_filesystems, c->n_temporary_filesystems); |
5312 | c->temporary_filesystems = NULL; | |
5313 | c->n_temporary_filesystems = 0; | |
b3d13314 | 5314 | c->mount_images = mount_image_free_many(c->mount_images, &c->n_mount_images); |
d2d6c096 | 5315 | |
0985c7c4 | 5316 | cpu_set_reset(&c->cpu_set); |
b070c7c0 | 5317 | numa_policy_reset(&c->numa_policy); |
86a3475b | 5318 | |
a1e58e8e LP |
5319 | c->utmp_id = mfree(c->utmp_id); |
5320 | c->selinux_context = mfree(c->selinux_context); | |
5321 | c->apparmor_profile = mfree(c->apparmor_profile); | |
5b8e1b77 | 5322 | c->smack_process_label = mfree(c->smack_process_label); |
eef65bf3 | 5323 | |
9b412709 | 5324 | c->restrict_filesystems = set_free_free(c->restrict_filesystems); |
b1994387 | 5325 | |
8cfa775f | 5326 | c->syscall_filter = hashmap_free(c->syscall_filter); |
525d3cc7 LP |
5327 | c->syscall_archs = set_free(c->syscall_archs); |
5328 | c->address_families = set_free(c->address_families); | |
e66cf1a3 | 5329 | |
5b10116e | 5330 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) |
211a3d87 | 5331 | exec_directory_done(&c->directories[t]); |
d3070fbd LP |
5332 | |
5333 | c->log_level_max = -1; | |
5334 | ||
5335 | exec_context_free_log_extra_fields(c); | |
9b412709 FS |
5336 | c->log_filter_allowed_patterns = set_free_free(c->log_filter_allowed_patterns); |
5337 | c->log_filter_denied_patterns = set_free_free(c->log_filter_denied_patterns); | |
08f3be7a | 5338 | |
5ac1530e ZJS |
5339 | c->log_ratelimit_interval_usec = 0; |
5340 | c->log_ratelimit_burst = 0; | |
90fc172e | 5341 | |
08f3be7a LP |
5342 | c->stdin_data = mfree(c->stdin_data); |
5343 | c->stdin_data_size = 0; | |
a8d08f39 LP |
5344 | |
5345 | c->network_namespace_path = mfree(c->network_namespace_path); | |
71d1e583 | 5346 | c->ipc_namespace_path = mfree(c->ipc_namespace_path); |
91dd5f7c LP |
5347 | |
5348 | c->log_namespace = mfree(c->log_namespace); | |
bb0c0d6f | 5349 | |
43144be4 | 5350 | c->load_credentials = hashmap_free(c->load_credentials); |
bb0c0d6f | 5351 | c->set_credentials = hashmap_free(c->set_credentials); |
9b412709 | 5352 | c->import_credentials = set_free_free(c->import_credentials); |
84be0c71 LP |
5353 | |
5354 | c->root_image_policy = image_policy_free(c->root_image_policy); | |
5355 | c->mount_image_policy = image_policy_free(c->mount_image_policy); | |
5356 | c->extension_image_policy = image_policy_free(c->extension_image_policy); | |
e66cf1a3 LP |
5357 | } |
5358 | ||
34cf6c43 | 5359 | int exec_context_destroy_runtime_directory(const ExecContext *c, const char *runtime_prefix) { |
e66cf1a3 LP |
5360 | assert(c); |
5361 | ||
5362 | if (!runtime_prefix) | |
5363 | return 0; | |
5364 | ||
211a3d87 | 5365 | for (size_t i = 0; i < c->directories[EXEC_DIRECTORY_RUNTIME].n_items; i++) { |
c2b2df60 | 5366 | _cleanup_free_ char *p = NULL; |
e66cf1a3 | 5367 | |
494d0247 | 5368 | if (exec_directory_is_private(c, EXEC_DIRECTORY_RUNTIME)) |
211a3d87 | 5369 | p = path_join(runtime_prefix, "private", c->directories[EXEC_DIRECTORY_RUNTIME].items[i].path); |
494d0247 | 5370 | else |
211a3d87 | 5371 | p = path_join(runtime_prefix, c->directories[EXEC_DIRECTORY_RUNTIME].items[i].path); |
e66cf1a3 LP |
5372 | if (!p) |
5373 | return -ENOMEM; | |
5374 | ||
7bc4bf4a LP |
5375 | /* We execute this synchronously, since we need to be sure this is gone when we start the |
5376 | * service next. */ | |
c6878637 | 5377 | (void) rm_rf(p, REMOVE_ROOT); |
211a3d87 | 5378 | |
211a3d87 LB |
5379 | STRV_FOREACH(symlink, c->directories[EXEC_DIRECTORY_RUNTIME].items[i].symlinks) { |
5380 | _cleanup_free_ char *symlink_abs = NULL; | |
5381 | ||
5382 | if (exec_directory_is_private(c, EXEC_DIRECTORY_RUNTIME)) | |
5383 | symlink_abs = path_join(runtime_prefix, "private", *symlink); | |
5384 | else | |
5385 | symlink_abs = path_join(runtime_prefix, *symlink); | |
5386 | if (!symlink_abs) | |
5387 | return -ENOMEM; | |
5388 | ||
5389 | (void) unlink(symlink_abs); | |
5390 | } | |
e66cf1a3 LP |
5391 | } |
5392 | ||
5393 | return 0; | |
5cb5a6ff LP |
5394 | } |
5395 | ||
b9f976fb MK |
5396 | int exec_context_destroy_mount_ns_dir(Unit *u) { |
5397 | _cleanup_free_ char *p = NULL; | |
5398 | ||
5399 | if (!u || !MANAGER_IS_SYSTEM(u->manager)) | |
5400 | return 0; | |
5401 | ||
5402 | p = path_join("/run/systemd/propagate/", u->id); | |
5403 | if (!p) | |
5404 | return -ENOMEM; | |
5405 | ||
5406 | /* This is only filled transiently (see mount_in_namespace()), should be empty or even non-existent*/ | |
5407 | if (rmdir(p) < 0 && errno != ENOENT) | |
5408 | log_unit_debug_errno(u, errno, "Unable to remove propagation dir '%s', ignoring: %m", p); | |
5409 | ||
5410 | return 0; | |
5411 | } | |
5412 | ||
34cf6c43 | 5413 | static void exec_command_done(ExecCommand *c) { |
43d0fcbd LP |
5414 | assert(c); |
5415 | ||
a1e58e8e | 5416 | c->path = mfree(c->path); |
6796073e | 5417 | c->argv = strv_free(c->argv); |
43d0fcbd LP |
5418 | } |
5419 | ||
da6053d0 | 5420 | void exec_command_done_array(ExecCommand *c, size_t n) { |
fe96c0f8 | 5421 | for (size_t i = 0; i < n; i++) |
43d0fcbd LP |
5422 | exec_command_done(c+i); |
5423 | } | |
5424 | ||
f1acf85a | 5425 | ExecCommand* exec_command_free_list(ExecCommand *c) { |
5cb5a6ff LP |
5426 | ExecCommand *i; |
5427 | ||
52e3671b | 5428 | while ((i = LIST_POP(command, c))) { |
43d0fcbd | 5429 | exec_command_done(i); |
5cb5a6ff LP |
5430 | free(i); |
5431 | } | |
f1acf85a ZJS |
5432 | |
5433 | return NULL; | |
5cb5a6ff LP |
5434 | } |
5435 | ||
da6053d0 | 5436 | void exec_command_free_array(ExecCommand **c, size_t n) { |
5b10116e | 5437 | for (size_t i = 0; i < n; i++) |
f1acf85a | 5438 | c[i] = exec_command_free_list(c[i]); |
034c6ed7 LP |
5439 | } |
5440 | ||
6a1d4d9f | 5441 | void exec_command_reset_status_array(ExecCommand *c, size_t n) { |
5b10116e | 5442 | for (size_t i = 0; i < n; i++) |
6a1d4d9f LP |
5443 | exec_status_reset(&c[i].exec_status); |
5444 | } | |
5445 | ||
5446 | void exec_command_reset_status_list_array(ExecCommand **c, size_t n) { | |
03677889 | 5447 | for (size_t i = 0; i < n; i++) |
6a1d4d9f LP |
5448 | LIST_FOREACH(command, z, c[i]) |
5449 | exec_status_reset(&z->exec_status); | |
6a1d4d9f LP |
5450 | } |
5451 | ||
039f0e70 | 5452 | typedef struct InvalidEnvInfo { |
34cf6c43 | 5453 | const Unit *unit; |
039f0e70 LP |
5454 | const char *path; |
5455 | } InvalidEnvInfo; | |
5456 | ||
5457 | static void invalid_env(const char *p, void *userdata) { | |
5458 | InvalidEnvInfo *info = userdata; | |
5459 | ||
f2341e0a | 5460 | log_unit_error(info->unit, "Ignoring invalid environment assignment '%s': %s", p, info->path); |
039f0e70 LP |
5461 | } |
5462 | ||
52c239d7 LB |
5463 | const char* exec_context_fdname(const ExecContext *c, int fd_index) { |
5464 | assert(c); | |
5465 | ||
5466 | switch (fd_index) { | |
5073ff6b | 5467 | |
52c239d7 LB |
5468 | case STDIN_FILENO: |
5469 | if (c->std_input != EXEC_INPUT_NAMED_FD) | |
5470 | return NULL; | |
5073ff6b | 5471 | |
52c239d7 | 5472 | return c->stdio_fdname[STDIN_FILENO] ?: "stdin"; |
5073ff6b | 5473 | |
52c239d7 LB |
5474 | case STDOUT_FILENO: |
5475 | if (c->std_output != EXEC_OUTPUT_NAMED_FD) | |
5476 | return NULL; | |
5073ff6b | 5477 | |
52c239d7 | 5478 | return c->stdio_fdname[STDOUT_FILENO] ?: "stdout"; |
5073ff6b | 5479 | |
52c239d7 LB |
5480 | case STDERR_FILENO: |
5481 | if (c->std_error != EXEC_OUTPUT_NAMED_FD) | |
5482 | return NULL; | |
5073ff6b | 5483 | |
52c239d7 | 5484 | return c->stdio_fdname[STDERR_FILENO] ?: "stderr"; |
5073ff6b | 5485 | |
52c239d7 LB |
5486 | default: |
5487 | return NULL; | |
5488 | } | |
5489 | } | |
5490 | ||
2caa38e9 LP |
5491 | static int exec_context_named_iofds( |
5492 | const ExecContext *c, | |
5493 | const ExecParameters *p, | |
5494 | int named_iofds[static 3]) { | |
5495 | ||
5b10116e | 5496 | size_t targets; |
56fbd561 | 5497 | const char* stdio_fdname[3]; |
da6053d0 | 5498 | size_t n_fds; |
52c239d7 LB |
5499 | |
5500 | assert(c); | |
5501 | assert(p); | |
2caa38e9 | 5502 | assert(named_iofds); |
52c239d7 LB |
5503 | |
5504 | targets = (c->std_input == EXEC_INPUT_NAMED_FD) + | |
5505 | (c->std_output == EXEC_OUTPUT_NAMED_FD) + | |
5506 | (c->std_error == EXEC_OUTPUT_NAMED_FD); | |
5507 | ||
5b10116e | 5508 | for (size_t i = 0; i < 3; i++) |
52c239d7 LB |
5509 | stdio_fdname[i] = exec_context_fdname(c, i); |
5510 | ||
4c47affc FB |
5511 | n_fds = p->n_storage_fds + p->n_socket_fds; |
5512 | ||
5b10116e | 5513 | for (size_t i = 0; i < n_fds && targets > 0; i++) |
56fbd561 ZJS |
5514 | if (named_iofds[STDIN_FILENO] < 0 && |
5515 | c->std_input == EXEC_INPUT_NAMED_FD && | |
5516 | stdio_fdname[STDIN_FILENO] && | |
5517 | streq(p->fd_names[i], stdio_fdname[STDIN_FILENO])) { | |
5518 | ||
52c239d7 LB |
5519 | named_iofds[STDIN_FILENO] = p->fds[i]; |
5520 | targets--; | |
56fbd561 ZJS |
5521 | |
5522 | } else if (named_iofds[STDOUT_FILENO] < 0 && | |
5523 | c->std_output == EXEC_OUTPUT_NAMED_FD && | |
5524 | stdio_fdname[STDOUT_FILENO] && | |
5525 | streq(p->fd_names[i], stdio_fdname[STDOUT_FILENO])) { | |
5526 | ||
52c239d7 LB |
5527 | named_iofds[STDOUT_FILENO] = p->fds[i]; |
5528 | targets--; | |
56fbd561 ZJS |
5529 | |
5530 | } else if (named_iofds[STDERR_FILENO] < 0 && | |
5531 | c->std_error == EXEC_OUTPUT_NAMED_FD && | |
5532 | stdio_fdname[STDERR_FILENO] && | |
5533 | streq(p->fd_names[i], stdio_fdname[STDERR_FILENO])) { | |
5534 | ||
52c239d7 LB |
5535 | named_iofds[STDERR_FILENO] = p->fds[i]; |
5536 | targets--; | |
5537 | } | |
5538 | ||
56fbd561 | 5539 | return targets == 0 ? 0 : -ENOENT; |
52c239d7 LB |
5540 | } |
5541 | ||
398a5009 ZJS |
5542 | static int exec_context_load_environment(const Unit *unit, const ExecContext *c, char ***ret) { |
5543 | _cleanup_strv_free_ char **v = NULL; | |
398a5009 | 5544 | int r; |
8c7be95e LP |
5545 | |
5546 | assert(c); | |
398a5009 | 5547 | assert(ret); |
8c7be95e LP |
5548 | |
5549 | STRV_FOREACH(i, c->environment_files) { | |
7fd1b19b | 5550 | _cleanup_globfree_ glob_t pglob = {}; |
398a5009 ZJS |
5551 | bool ignore = false; |
5552 | char *fn = *i; | |
8c7be95e LP |
5553 | |
5554 | if (fn[0] == '-') { | |
5555 | ignore = true; | |
313cefa1 | 5556 | fn++; |
8c7be95e LP |
5557 | } |
5558 | ||
5559 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
5560 | if (ignore) |
5561 | continue; | |
8c7be95e LP |
5562 | return -EINVAL; |
5563 | } | |
5564 | ||
2bef10ab | 5565 | /* Filename supports globbing, take all matching files */ |
398a5009 ZJS |
5566 | r = safe_glob(fn, 0, &pglob); |
5567 | if (r < 0) { | |
2bef10ab PL |
5568 | if (ignore) |
5569 | continue; | |
398a5009 | 5570 | return r; |
2bef10ab | 5571 | } |
8c7be95e | 5572 | |
d8c92e8b ZJS |
5573 | /* When we don't match anything, -ENOENT should be returned */ |
5574 | assert(pglob.gl_pathc > 0); | |
5575 | ||
fcc06682 | 5576 | for (size_t n = 0; n < pglob.gl_pathc; n++) { |
398a5009 ZJS |
5577 | _cleanup_strv_free_ char **p = NULL; |
5578 | ||
5579 | r = load_env_file(NULL, pglob.gl_pathv[n], &p); | |
5580 | if (r < 0) { | |
2bef10ab PL |
5581 | if (ignore) |
5582 | continue; | |
398a5009 | 5583 | return r; |
e9c1ea9d | 5584 | } |
398a5009 | 5585 | |
ebc05a09 | 5586 | /* Log invalid environment variables with filename */ |
039f0e70 LP |
5587 | if (p) { |
5588 | InvalidEnvInfo info = { | |
f2341e0a | 5589 | .unit = unit, |
039f0e70 LP |
5590 | .path = pglob.gl_pathv[n] |
5591 | }; | |
5592 | ||
5593 | p = strv_env_clean_with_callback(p, invalid_env, &info); | |
5594 | } | |
8c7be95e | 5595 | |
398a5009 ZJS |
5596 | if (!v) |
5597 | v = TAKE_PTR(p); | |
2bef10ab | 5598 | else { |
398a5009 | 5599 | char **m = strv_env_merge(v, p); |
c84a9488 | 5600 | if (!m) |
2bef10ab | 5601 | return -ENOMEM; |
2bef10ab | 5602 | |
398a5009 | 5603 | strv_free_and_replace(v, m); |
2bef10ab | 5604 | } |
8c7be95e LP |
5605 | } |
5606 | } | |
5607 | ||
398a5009 | 5608 | *ret = TAKE_PTR(v); |
8c7be95e LP |
5609 | |
5610 | return 0; | |
5611 | } | |
5612 | ||
6ac8fdc9 | 5613 | static bool tty_may_match_dev_console(const char *tty) { |
7b912648 | 5614 | _cleanup_free_ char *resolved = NULL; |
6ac8fdc9 | 5615 | |
1e22b5cd LP |
5616 | if (!tty) |
5617 | return true; | |
5618 | ||
a119ec7c | 5619 | tty = skip_dev_prefix(tty); |
6ac8fdc9 MS |
5620 | |
5621 | /* trivial identity? */ | |
5622 | if (streq(tty, "console")) | |
5623 | return true; | |
5624 | ||
7b912648 LP |
5625 | if (resolve_dev_console(&resolved) < 0) |
5626 | return true; /* if we could not resolve, assume it may */ | |
6ac8fdc9 MS |
5627 | |
5628 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
955f1c85 | 5629 | return path_equal(resolved, tty) || (streq(resolved, "tty0") && tty_is_vc(tty)); |
6ac8fdc9 MS |
5630 | } |
5631 | ||
6c0ae739 LP |
5632 | static bool exec_context_may_touch_tty(const ExecContext *ec) { |
5633 | assert(ec); | |
1e22b5cd | 5634 | |
6c0ae739 | 5635 | return ec->tty_reset || |
1e22b5cd LP |
5636 | ec->tty_vhangup || |
5637 | ec->tty_vt_disallocate || | |
6ac8fdc9 MS |
5638 | is_terminal_input(ec->std_input) || |
5639 | is_terminal_output(ec->std_output) || | |
6c0ae739 LP |
5640 | is_terminal_output(ec->std_error); |
5641 | } | |
5642 | ||
5643 | bool exec_context_may_touch_console(const ExecContext *ec) { | |
5644 | ||
5645 | return exec_context_may_touch_tty(ec) && | |
1e22b5cd | 5646 | tty_may_match_dev_console(exec_context_tty_path(ec)); |
6ac8fdc9 MS |
5647 | } |
5648 | ||
15ae422b | 5649 | static void strv_fprintf(FILE *f, char **l) { |
15ae422b LP |
5650 | assert(f); |
5651 | ||
5652 | STRV_FOREACH(g, l) | |
5653 | fprintf(f, " %s", *g); | |
5654 | } | |
5655 | ||
ddc155b2 TM |
5656 | static void strv_dump(FILE* f, const char *prefix, const char *name, char **strv) { |
5657 | assert(f); | |
5658 | assert(prefix); | |
5659 | assert(name); | |
5660 | ||
5661 | if (!strv_isempty(strv)) { | |
a7bd1656 | 5662 | fprintf(f, "%s%s:", prefix, name); |
ddc155b2 TM |
5663 | strv_fprintf(f, strv); |
5664 | fputs("\n", f); | |
5665 | } | |
5666 | } | |
5667 | ||
34cf6c43 | 5668 | void exec_context_dump(const ExecContext *c, FILE* f, const char *prefix) { |
add00535 | 5669 | int r; |
9eba9da4 | 5670 | |
5cb5a6ff LP |
5671 | assert(c); |
5672 | assert(f); | |
5673 | ||
4ad49000 | 5674 | prefix = strempty(prefix); |
5cb5a6ff LP |
5675 | |
5676 | fprintf(f, | |
94f04347 LP |
5677 | "%sUMask: %04o\n" |
5678 | "%sWorkingDirectory: %s\n" | |
451a074f | 5679 | "%sRootDirectory: %s\n" |
9c0c6701 | 5680 | "%sRootEphemeral: %s\n" |
15ae422b | 5681 | "%sNonBlocking: %s\n" |
64747e2d | 5682 | "%sPrivateTmp: %s\n" |
7f112f50 | 5683 | "%sPrivateDevices: %s\n" |
59eeb84b | 5684 | "%sProtectKernelTunables: %s\n" |
e66a2f65 | 5685 | "%sProtectKernelModules: %s\n" |
84703040 | 5686 | "%sProtectKernelLogs: %s\n" |
fc64760d | 5687 | "%sProtectClock: %s\n" |
59eeb84b | 5688 | "%sProtectControlGroups: %s\n" |
d251207d LP |
5689 | "%sPrivateNetwork: %s\n" |
5690 | "%sPrivateUsers: %s\n" | |
1b8689f9 LP |
5691 | "%sProtectHome: %s\n" |
5692 | "%sProtectSystem: %s\n" | |
5d997827 | 5693 | "%sMountAPIVFS: %s\n" |
f3e43635 | 5694 | "%sIgnoreSIGPIPE: %s\n" |
f4170c67 | 5695 | "%sMemoryDenyWriteExecute: %s\n" |
b1edf445 | 5696 | "%sRestrictRealtime: %s\n" |
f69567cb | 5697 | "%sRestrictSUIDSGID: %s\n" |
aecd5ac6 | 5698 | "%sKeyringMode: %s\n" |
4e399953 LP |
5699 | "%sProtectHostname: %s\n" |
5700 | "%sProtectProc: %s\n" | |
5701 | "%sProcSubset: %s\n", | |
5cb5a6ff | 5702 | prefix, c->umask, |
14eb3285 LP |
5703 | prefix, empty_to_root(c->working_directory), |
5704 | prefix, empty_to_root(c->root_directory), | |
9c0c6701 | 5705 | prefix, yes_no(c->root_ephemeral), |
15ae422b | 5706 | prefix, yes_no(c->non_blocking), |
64747e2d | 5707 | prefix, yes_no(c->private_tmp), |
7f112f50 | 5708 | prefix, yes_no(c->private_devices), |
59eeb84b | 5709 | prefix, yes_no(c->protect_kernel_tunables), |
e66a2f65 | 5710 | prefix, yes_no(c->protect_kernel_modules), |
84703040 | 5711 | prefix, yes_no(c->protect_kernel_logs), |
fc64760d | 5712 | prefix, yes_no(c->protect_clock), |
59eeb84b | 5713 | prefix, yes_no(c->protect_control_groups), |
d251207d LP |
5714 | prefix, yes_no(c->private_network), |
5715 | prefix, yes_no(c->private_users), | |
1b8689f9 LP |
5716 | prefix, protect_home_to_string(c->protect_home), |
5717 | prefix, protect_system_to_string(c->protect_system), | |
5e98086d | 5718 | prefix, yes_no(exec_context_get_effective_mount_apivfs(c)), |
f3e43635 | 5719 | prefix, yes_no(c->ignore_sigpipe), |
f4170c67 | 5720 | prefix, yes_no(c->memory_deny_write_execute), |
b1edf445 | 5721 | prefix, yes_no(c->restrict_realtime), |
f69567cb | 5722 | prefix, yes_no(c->restrict_suid_sgid), |
aecd5ac6 | 5723 | prefix, exec_keyring_mode_to_string(c->keyring_mode), |
4e399953 LP |
5724 | prefix, yes_no(c->protect_hostname), |
5725 | prefix, protect_proc_to_string(c->protect_proc), | |
5726 | prefix, proc_subset_to_string(c->proc_subset)); | |
fb33a393 | 5727 | |
915e6d16 LP |
5728 | if (c->root_image) |
5729 | fprintf(f, "%sRootImage: %s\n", prefix, c->root_image); | |
5730 | ||
18d73705 | 5731 | if (c->root_image_options) { |
18d73705 LB |
5732 | fprintf(f, "%sRootImageOptions:", prefix); |
5733 | LIST_FOREACH(mount_options, o, c->root_image_options) | |
5734 | if (!isempty(o->options)) | |
9ece6444 LB |
5735 | fprintf(f, " %s:%s", |
5736 | partition_designator_to_string(o->partition_designator), | |
5737 | o->options); | |
18d73705 LB |
5738 | fprintf(f, "\n"); |
5739 | } | |
5740 | ||
0389f4fa LB |
5741 | if (c->root_hash) { |
5742 | _cleanup_free_ char *encoded = NULL; | |
5743 | encoded = hexmem(c->root_hash, c->root_hash_size); | |
5744 | if (encoded) | |
5745 | fprintf(f, "%sRootHash: %s\n", prefix, encoded); | |
5746 | } | |
5747 | ||
5748 | if (c->root_hash_path) | |
5749 | fprintf(f, "%sRootHash: %s\n", prefix, c->root_hash_path); | |
5750 | ||
d4d55b0d LB |
5751 | if (c->root_hash_sig) { |
5752 | _cleanup_free_ char *encoded = NULL; | |
5753 | ssize_t len; | |
5754 | len = base64mem(c->root_hash_sig, c->root_hash_sig_size, &encoded); | |
5755 | if (len) | |
5756 | fprintf(f, "%sRootHashSignature: base64:%s\n", prefix, encoded); | |
5757 | } | |
5758 | ||
5759 | if (c->root_hash_sig_path) | |
5760 | fprintf(f, "%sRootHashSignature: %s\n", prefix, c->root_hash_sig_path); | |
5761 | ||
0389f4fa LB |
5762 | if (c->root_verity) |
5763 | fprintf(f, "%sRootVerity: %s\n", prefix, c->root_verity); | |
5764 | ||
8c7be95e LP |
5765 | STRV_FOREACH(e, c->environment) |
5766 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
5767 | ||
5768 | STRV_FOREACH(e, c->environment_files) | |
5769 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 5770 | |
b4c14404 FB |
5771 | STRV_FOREACH(e, c->pass_environment) |
5772 | fprintf(f, "%sPassEnvironment: %s\n", prefix, *e); | |
5773 | ||
00819cc1 LP |
5774 | STRV_FOREACH(e, c->unset_environment) |
5775 | fprintf(f, "%sUnsetEnvironment: %s\n", prefix, *e); | |
5776 | ||
53f47dfc YW |
5777 | fprintf(f, "%sRuntimeDirectoryPreserve: %s\n", prefix, exec_preserve_mode_to_string(c->runtime_directory_preserve_mode)); |
5778 | ||
5b10116e | 5779 | for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { |
3536f49e YW |
5780 | fprintf(f, "%s%sMode: %04o\n", prefix, exec_directory_type_to_string(dt), c->directories[dt].mode); |
5781 | ||
211a3d87 LB |
5782 | for (size_t i = 0; i < c->directories[dt].n_items; i++) { |
5783 | fprintf(f, "%s%s: %s\n", prefix, exec_directory_type_to_string(dt), c->directories[dt].items[i].path); | |
5784 | ||
5785 | STRV_FOREACH(d, c->directories[dt].items[i].symlinks) | |
5786 | fprintf(f, "%s%s: %s:%s\n", prefix, exec_directory_type_symlink_to_string(dt), c->directories[dt].items[i].path, *d); | |
5787 | } | |
3536f49e | 5788 | } |
c2bbd90b | 5789 | |
5291f26d | 5790 | fprintf(f, "%sTimeoutCleanSec: %s\n", prefix, FORMAT_TIMESPAN(c->timeout_clean_usec, USEC_PER_SEC)); |
12213aed | 5791 | |
fb33a393 | 5792 | if (c->nice_set) |
5291f26d | 5793 | fprintf(f, "%sNice: %i\n", prefix, c->nice); |
fb33a393 | 5794 | |
dd6c17b1 | 5795 | if (c->oom_score_adjust_set) |
5291f26d | 5796 | fprintf(f, "%sOOMScoreAdjust: %i\n", prefix, c->oom_score_adjust); |
9eba9da4 | 5797 | |
ad21e542 | 5798 | if (c->coredump_filter_set) |
5291f26d | 5799 | fprintf(f, "%sCoredumpFilter: 0x%"PRIx64"\n", prefix, c->coredump_filter); |
ad21e542 | 5800 | |
5b10116e | 5801 | for (unsigned i = 0; i < RLIM_NLIMITS; i++) |
3c11da9d | 5802 | if (c->rlimit[i]) { |
4c3a2b84 | 5803 | fprintf(f, "%sLimit%s: " RLIM_FMT "\n", |
3c11da9d | 5804 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_max); |
4c3a2b84 | 5805 | fprintf(f, "%sLimit%sSoft: " RLIM_FMT "\n", |
3c11da9d EV |
5806 | prefix, rlimit_to_string(i), c->rlimit[i]->rlim_cur); |
5807 | } | |
94f04347 | 5808 | |
f8b69d1d | 5809 | if (c->ioprio_set) { |
1756a011 | 5810 | _cleanup_free_ char *class_str = NULL; |
f8b69d1d | 5811 | |
5bead76e | 5812 | r = ioprio_class_to_string_alloc(ioprio_prio_class(c->ioprio), &class_str); |
837df140 YW |
5813 | if (r >= 0) |
5814 | fprintf(f, "%sIOSchedulingClass: %s\n", prefix, class_str); | |
5815 | ||
5bead76e | 5816 | fprintf(f, "%sIOPriority: %d\n", prefix, ioprio_prio_data(c->ioprio)); |
f8b69d1d | 5817 | } |
94f04347 | 5818 | |
f8b69d1d | 5819 | if (c->cpu_sched_set) { |
1756a011 | 5820 | _cleanup_free_ char *policy_str = NULL; |
f8b69d1d | 5821 | |
837df140 YW |
5822 | r = sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); |
5823 | if (r >= 0) | |
5824 | fprintf(f, "%sCPUSchedulingPolicy: %s\n", prefix, policy_str); | |
5825 | ||
94f04347 | 5826 | fprintf(f, |
38b48754 LP |
5827 | "%sCPUSchedulingPriority: %i\n" |
5828 | "%sCPUSchedulingResetOnFork: %s\n", | |
38b48754 LP |
5829 | prefix, c->cpu_sched_priority, |
5830 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
b929bf04 | 5831 | } |
94f04347 | 5832 | |
0985c7c4 | 5833 | if (c->cpu_set.set) { |
e7fca352 MS |
5834 | _cleanup_free_ char *affinity = NULL; |
5835 | ||
5836 | affinity = cpu_set_to_range_string(&c->cpu_set); | |
5837 | fprintf(f, "%sCPUAffinity: %s\n", prefix, affinity); | |
94f04347 LP |
5838 | } |
5839 | ||
b070c7c0 MS |
5840 | if (mpol_is_valid(numa_policy_get_type(&c->numa_policy))) { |
5841 | _cleanup_free_ char *nodes = NULL; | |
5842 | ||
5843 | nodes = cpu_set_to_range_string(&c->numa_policy.nodes); | |
5844 | fprintf(f, "%sNUMAPolicy: %s\n", prefix, mpol_to_string(numa_policy_get_type(&c->numa_policy))); | |
5845 | fprintf(f, "%sNUMAMask: %s\n", prefix, strnull(nodes)); | |
5846 | } | |
5847 | ||
3a43da28 | 5848 | if (c->timer_slack_nsec != NSEC_INFINITY) |
ccd06097 | 5849 | fprintf(f, "%sTimerSlackNSec: "NSEC_FMT "\n", prefix, c->timer_slack_nsec); |
94f04347 LP |
5850 | |
5851 | fprintf(f, | |
80876c20 LP |
5852 | "%sStandardInput: %s\n" |
5853 | "%sStandardOutput: %s\n" | |
5854 | "%sStandardError: %s\n", | |
5855 | prefix, exec_input_to_string(c->std_input), | |
5856 | prefix, exec_output_to_string(c->std_output), | |
5857 | prefix, exec_output_to_string(c->std_error)); | |
5858 | ||
befc4a80 LP |
5859 | if (c->std_input == EXEC_INPUT_NAMED_FD) |
5860 | fprintf(f, "%sStandardInputFileDescriptorName: %s\n", prefix, c->stdio_fdname[STDIN_FILENO]); | |
5861 | if (c->std_output == EXEC_OUTPUT_NAMED_FD) | |
5862 | fprintf(f, "%sStandardOutputFileDescriptorName: %s\n", prefix, c->stdio_fdname[STDOUT_FILENO]); | |
5863 | if (c->std_error == EXEC_OUTPUT_NAMED_FD) | |
5864 | fprintf(f, "%sStandardErrorFileDescriptorName: %s\n", prefix, c->stdio_fdname[STDERR_FILENO]); | |
5865 | ||
5866 | if (c->std_input == EXEC_INPUT_FILE) | |
5867 | fprintf(f, "%sStandardInputFile: %s\n", prefix, c->stdio_file[STDIN_FILENO]); | |
5868 | if (c->std_output == EXEC_OUTPUT_FILE) | |
5869 | fprintf(f, "%sStandardOutputFile: %s\n", prefix, c->stdio_file[STDOUT_FILENO]); | |
566b7d23 ZD |
5870 | if (c->std_output == EXEC_OUTPUT_FILE_APPEND) |
5871 | fprintf(f, "%sStandardOutputFileToAppend: %s\n", prefix, c->stdio_file[STDOUT_FILENO]); | |
8d7dab1f LW |
5872 | if (c->std_output == EXEC_OUTPUT_FILE_TRUNCATE) |
5873 | fprintf(f, "%sStandardOutputFileToTruncate: %s\n", prefix, c->stdio_file[STDOUT_FILENO]); | |
befc4a80 LP |
5874 | if (c->std_error == EXEC_OUTPUT_FILE) |
5875 | fprintf(f, "%sStandardErrorFile: %s\n", prefix, c->stdio_file[STDERR_FILENO]); | |
566b7d23 ZD |
5876 | if (c->std_error == EXEC_OUTPUT_FILE_APPEND) |
5877 | fprintf(f, "%sStandardErrorFileToAppend: %s\n", prefix, c->stdio_file[STDERR_FILENO]); | |
8d7dab1f LW |
5878 | if (c->std_error == EXEC_OUTPUT_FILE_TRUNCATE) |
5879 | fprintf(f, "%sStandardErrorFileToTruncate: %s\n", prefix, c->stdio_file[STDERR_FILENO]); | |
befc4a80 | 5880 | |
80876c20 LP |
5881 | if (c->tty_path) |
5882 | fprintf(f, | |
6ea832a2 LP |
5883 | "%sTTYPath: %s\n" |
5884 | "%sTTYReset: %s\n" | |
5885 | "%sTTYVHangup: %s\n" | |
51462135 DDM |
5886 | "%sTTYVTDisallocate: %s\n" |
5887 | "%sTTYRows: %u\n" | |
5888 | "%sTTYColumns: %u\n", | |
6ea832a2 LP |
5889 | prefix, c->tty_path, |
5890 | prefix, yes_no(c->tty_reset), | |
5891 | prefix, yes_no(c->tty_vhangup), | |
51462135 DDM |
5892 | prefix, yes_no(c->tty_vt_disallocate), |
5893 | prefix, c->tty_rows, | |
5894 | prefix, c->tty_cols); | |
94f04347 | 5895 | |
9f6444eb | 5896 | if (IN_SET(c->std_output, |
9f6444eb LP |
5897 | EXEC_OUTPUT_KMSG, |
5898 | EXEC_OUTPUT_JOURNAL, | |
9f6444eb LP |
5899 | EXEC_OUTPUT_KMSG_AND_CONSOLE, |
5900 | EXEC_OUTPUT_JOURNAL_AND_CONSOLE) || | |
5901 | IN_SET(c->std_error, | |
9f6444eb LP |
5902 | EXEC_OUTPUT_KMSG, |
5903 | EXEC_OUTPUT_JOURNAL, | |
9f6444eb LP |
5904 | EXEC_OUTPUT_KMSG_AND_CONSOLE, |
5905 | EXEC_OUTPUT_JOURNAL_AND_CONSOLE)) { | |
f8b69d1d | 5906 | |
5ce70e5b | 5907 | _cleanup_free_ char *fac_str = NULL, *lvl_str = NULL; |
f8b69d1d | 5908 | |
837df140 YW |
5909 | r = log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); |
5910 | if (r >= 0) | |
5911 | fprintf(f, "%sSyslogFacility: %s\n", prefix, fac_str); | |
f8b69d1d | 5912 | |
837df140 YW |
5913 | r = log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); |
5914 | if (r >= 0) | |
5915 | fprintf(f, "%sSyslogLevel: %s\n", prefix, lvl_str); | |
f8b69d1d | 5916 | } |
94f04347 | 5917 | |
d3070fbd LP |
5918 | if (c->log_level_max >= 0) { |
5919 | _cleanup_free_ char *t = NULL; | |
5920 | ||
5921 | (void) log_level_to_string_alloc(c->log_level_max, &t); | |
5922 | ||
5923 | fprintf(f, "%sLogLevelMax: %s\n", prefix, strna(t)); | |
5924 | } | |
5925 | ||
5291f26d | 5926 | if (c->log_ratelimit_interval_usec > 0) |
90fc172e AZ |
5927 | fprintf(f, |
5928 | "%sLogRateLimitIntervalSec: %s\n", | |
5291f26d | 5929 | prefix, FORMAT_TIMESPAN(c->log_ratelimit_interval_usec, USEC_PER_SEC)); |
90fc172e | 5930 | |
5ac1530e ZJS |
5931 | if (c->log_ratelimit_burst > 0) |
5932 | fprintf(f, "%sLogRateLimitBurst: %u\n", prefix, c->log_ratelimit_burst); | |
90fc172e | 5933 | |
523ea123 QD |
5934 | if (!set_isempty(c->log_filter_allowed_patterns) || !set_isempty(c->log_filter_denied_patterns)) { |
5935 | fprintf(f, "%sLogFilterPatterns:", prefix); | |
5936 | ||
5937 | char *pattern; | |
5938 | SET_FOREACH(pattern, c->log_filter_allowed_patterns) | |
5939 | fprintf(f, " %s", pattern); | |
5940 | SET_FOREACH(pattern, c->log_filter_denied_patterns) | |
5941 | fprintf(f, " ~%s", pattern); | |
5942 | fputc('\n', f); | |
5943 | } | |
5944 | ||
5b10116e ZJS |
5945 | for (size_t j = 0; j < c->n_log_extra_fields; j++) { |
5946 | fprintf(f, "%sLogExtraFields: ", prefix); | |
5947 | fwrite(c->log_extra_fields[j].iov_base, | |
5948 | 1, c->log_extra_fields[j].iov_len, | |
5949 | f); | |
5950 | fputc('\n', f); | |
d3070fbd LP |
5951 | } |
5952 | ||
91dd5f7c LP |
5953 | if (c->log_namespace) |
5954 | fprintf(f, "%sLogNamespace: %s\n", prefix, c->log_namespace); | |
5955 | ||
07d46372 YW |
5956 | if (c->secure_bits) { |
5957 | _cleanup_free_ char *str = NULL; | |
5958 | ||
5959 | r = secure_bits_to_string_alloc(c->secure_bits, &str); | |
5960 | if (r >= 0) | |
5961 | fprintf(f, "%sSecure Bits: %s\n", prefix, str); | |
5962 | } | |
94f04347 | 5963 | |
3fd5190b | 5964 | if (c->capability_bounding_set != CAP_MASK_UNSET) { |
dd1f5bd0 | 5965 | _cleanup_free_ char *str = NULL; |
94f04347 | 5966 | |
8142d735 | 5967 | r = capability_set_to_string(c->capability_bounding_set, &str); |
dd1f5bd0 YW |
5968 | if (r >= 0) |
5969 | fprintf(f, "%sCapabilityBoundingSet: %s\n", prefix, str); | |
755d4b67 IP |
5970 | } |
5971 | ||
5972 | if (c->capability_ambient_set != 0) { | |
dd1f5bd0 | 5973 | _cleanup_free_ char *str = NULL; |
755d4b67 | 5974 | |
8142d735 | 5975 | r = capability_set_to_string(c->capability_ambient_set, &str); |
dd1f5bd0 YW |
5976 | if (r >= 0) |
5977 | fprintf(f, "%sAmbientCapabilities: %s\n", prefix, str); | |
94f04347 LP |
5978 | } |
5979 | ||
5980 | if (c->user) | |
f2d3769a | 5981 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 5982 | if (c->group) |
f2d3769a | 5983 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 5984 | |
29206d46 LP |
5985 | fprintf(f, "%sDynamicUser: %s\n", prefix, yes_no(c->dynamic_user)); |
5986 | ||
ddc155b2 | 5987 | strv_dump(f, prefix, "SupplementaryGroups", c->supplementary_groups); |
94f04347 | 5988 | |
5b6319dc | 5989 | if (c->pam_name) |
f2d3769a | 5990 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 5991 | |
ddc155b2 TM |
5992 | strv_dump(f, prefix, "ReadWritePaths", c->read_write_paths); |
5993 | strv_dump(f, prefix, "ReadOnlyPaths", c->read_only_paths); | |
5994 | strv_dump(f, prefix, "InaccessiblePaths", c->inaccessible_paths); | |
5995 | strv_dump(f, prefix, "ExecPaths", c->exec_paths); | |
5996 | strv_dump(f, prefix, "NoExecPaths", c->no_exec_paths); | |
8c35c10d | 5997 | strv_dump(f, prefix, "ExecSearchPath", c->exec_search_path); |
2e22afe9 | 5998 | |
5b10116e ZJS |
5999 | for (size_t i = 0; i < c->n_bind_mounts; i++) |
6000 | fprintf(f, "%s%s: %s%s:%s:%s\n", prefix, | |
6001 | c->bind_mounts[i].read_only ? "BindReadOnlyPaths" : "BindPaths", | |
6002 | c->bind_mounts[i].ignore_enoent ? "-": "", | |
6003 | c->bind_mounts[i].source, | |
6004 | c->bind_mounts[i].destination, | |
6005 | c->bind_mounts[i].recursive ? "rbind" : "norbind"); | |
d2d6c096 | 6006 | |
5b10116e ZJS |
6007 | for (size_t i = 0; i < c->n_temporary_filesystems; i++) { |
6008 | const TemporaryFileSystem *t = c->temporary_filesystems + i; | |
2abd4e38 | 6009 | |
5b10116e ZJS |
6010 | fprintf(f, "%sTemporaryFileSystem: %s%s%s\n", prefix, |
6011 | t->path, | |
6012 | isempty(t->options) ? "" : ":", | |
6013 | strempty(t->options)); | |
6014 | } | |
2abd4e38 | 6015 | |
169c1bda LP |
6016 | if (c->utmp_id) |
6017 | fprintf(f, | |
6018 | "%sUtmpIdentifier: %s\n", | |
6019 | prefix, c->utmp_id); | |
7b52a628 MS |
6020 | |
6021 | if (c->selinux_context) | |
6022 | fprintf(f, | |
5f8640fb LP |
6023 | "%sSELinuxContext: %s%s\n", |
6024 | prefix, c->selinux_context_ignore ? "-" : "", c->selinux_context); | |
17df7223 | 6025 | |
80c21aea WC |
6026 | if (c->apparmor_profile) |
6027 | fprintf(f, | |
6028 | "%sAppArmorProfile: %s%s\n", | |
6029 | prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile); | |
6030 | ||
6031 | if (c->smack_process_label) | |
6032 | fprintf(f, | |
6033 | "%sSmackProcessLabel: %s%s\n", | |
6034 | prefix, c->smack_process_label_ignore ? "-" : "", c->smack_process_label); | |
6035 | ||
050f7277 | 6036 | if (c->personality != PERSONALITY_INVALID) |
ac45f971 LP |
6037 | fprintf(f, |
6038 | "%sPersonality: %s\n", | |
6039 | prefix, strna(personality_to_string(c->personality))); | |
6040 | ||
78e864e5 TM |
6041 | fprintf(f, |
6042 | "%sLockPersonality: %s\n", | |
6043 | prefix, yes_no(c->lock_personality)); | |
6044 | ||
17df7223 | 6045 | if (c->syscall_filter) { |
17df7223 | 6046 | fprintf(f, |
57183d11 | 6047 | "%sSystemCallFilter: ", |
17df7223 LP |
6048 | prefix); |
6049 | ||
6b000af4 | 6050 | if (!c->syscall_allow_list) |
17df7223 LP |
6051 | fputc('~', f); |
6052 | ||
349cc4a5 | 6053 | #if HAVE_SECCOMP |
d5a99b7c JJ |
6054 | void *id, *val; |
6055 | bool first = true; | |
90e74a66 | 6056 | HASHMAP_FOREACH_KEY(val, id, c->syscall_filter) { |
17df7223 | 6057 | _cleanup_free_ char *name = NULL; |
8cfa775f YW |
6058 | const char *errno_name = NULL; |
6059 | int num = PTR_TO_INT(val); | |
17df7223 LP |
6060 | |
6061 | if (first) | |
6062 | first = false; | |
6063 | else | |
6064 | fputc(' ', f); | |
6065 | ||
57183d11 | 6066 | name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1); |
17df7223 | 6067 | fputs(strna(name), f); |
8cfa775f YW |
6068 | |
6069 | if (num >= 0) { | |
005bfaf1 | 6070 | errno_name = seccomp_errno_or_action_to_string(num); |
8cfa775f YW |
6071 | if (errno_name) |
6072 | fprintf(f, ":%s", errno_name); | |
6073 | else | |
6074 | fprintf(f, ":%d", num); | |
6075 | } | |
17df7223 | 6076 | } |
351a19b1 | 6077 | #endif |
17df7223 LP |
6078 | |
6079 | fputc('\n', f); | |
6080 | } | |
6081 | ||
57183d11 | 6082 | if (c->syscall_archs) { |
57183d11 LP |
6083 | fprintf(f, |
6084 | "%sSystemCallArchitectures:", | |
6085 | prefix); | |
6086 | ||
349cc4a5 | 6087 | #if HAVE_SECCOMP |
d5a99b7c | 6088 | void *id; |
90e74a66 | 6089 | SET_FOREACH(id, c->syscall_archs) |
57183d11 LP |
6090 | fprintf(f, " %s", strna(seccomp_arch_to_string(PTR_TO_UINT32(id) - 1))); |
6091 | #endif | |
6092 | fputc('\n', f); | |
6093 | } | |
6094 | ||
add00535 LP |
6095 | if (exec_context_restrict_namespaces_set(c)) { |
6096 | _cleanup_free_ char *s = NULL; | |
6097 | ||
86c2a9f1 | 6098 | r = namespace_flags_to_string(c->restrict_namespaces, &s); |
add00535 LP |
6099 | if (r >= 0) |
6100 | fprintf(f, "%sRestrictNamespaces: %s\n", | |
dd0395b5 | 6101 | prefix, strna(s)); |
add00535 LP |
6102 | } |
6103 | ||
b1994387 | 6104 | #if HAVE_LIBBPF |
8fe84dc8 YW |
6105 | if (exec_context_restrict_filesystems_set(c)) { |
6106 | char *fs; | |
6107 | SET_FOREACH(fs, c->restrict_filesystems) | |
6108 | fprintf(f, "%sRestrictFileSystems: %s\n", prefix, fs); | |
6109 | } | |
b1994387 ILG |
6110 | #endif |
6111 | ||
a8d08f39 LP |
6112 | if (c->network_namespace_path) |
6113 | fprintf(f, | |
6114 | "%sNetworkNamespacePath: %s\n", | |
6115 | prefix, c->network_namespace_path); | |
6116 | ||
3df90f24 | 6117 | if (c->syscall_errno > 0) { |
3df90f24 YW |
6118 | fprintf(f, "%sSystemCallErrorNumber: ", prefix); |
6119 | ||
005bfaf1 | 6120 | #if HAVE_SECCOMP |
d5a99b7c | 6121 | const char *errno_name = seccomp_errno_or_action_to_string(c->syscall_errno); |
3df90f24 | 6122 | if (errno_name) |
005bfaf1 | 6123 | fputs(errno_name, f); |
3df90f24 | 6124 | else |
005bfaf1 TM |
6125 | fprintf(f, "%d", c->syscall_errno); |
6126 | #endif | |
6127 | fputc('\n', f); | |
3df90f24 | 6128 | } |
b3d13314 | 6129 | |
5b10116e | 6130 | for (size_t i = 0; i < c->n_mount_images; i++) { |
79e20ceb | 6131 | fprintf(f, "%sMountImages: %s%s:%s", prefix, |
b3d13314 LB |
6132 | c->mount_images[i].ignore_enoent ? "-": "", |
6133 | c->mount_images[i].source, | |
79e20ceb | 6134 | c->mount_images[i].destination); |
427353f6 | 6135 | LIST_FOREACH(mount_options, o, c->mount_images[i].mount_options) |
79e20ceb | 6136 | fprintf(f, ":%s:%s", |
427353f6 | 6137 | partition_designator_to_string(o->partition_designator), |
79e20ceb | 6138 | strempty(o->options)); |
427353f6 LB |
6139 | fprintf(f, "\n"); |
6140 | } | |
93f59701 LB |
6141 | |
6142 | for (size_t i = 0; i < c->n_extension_images; i++) { | |
93f59701 LB |
6143 | fprintf(f, "%sExtensionImages: %s%s", prefix, |
6144 | c->extension_images[i].ignore_enoent ? "-": "", | |
6145 | c->extension_images[i].source); | |
6146 | LIST_FOREACH(mount_options, o, c->extension_images[i].mount_options) | |
6147 | fprintf(f, ":%s:%s", | |
6148 | partition_designator_to_string(o->partition_designator), | |
6149 | strempty(o->options)); | |
6150 | fprintf(f, "\n"); | |
6151 | } | |
a07b9926 LB |
6152 | |
6153 | strv_dump(f, prefix, "ExtensionDirectories", c->extension_directories); | |
5cb5a6ff LP |
6154 | } |
6155 | ||
34cf6c43 | 6156 | bool exec_context_maintains_privileges(const ExecContext *c) { |
a931ad47 LP |
6157 | assert(c); |
6158 | ||
61233823 | 6159 | /* Returns true if the process forked off would run under |
a931ad47 LP |
6160 | * an unchanged UID or as root. */ |
6161 | ||
6162 | if (!c->user) | |
6163 | return true; | |
6164 | ||
6165 | if (streq(c->user, "root") || streq(c->user, "0")) | |
6166 | return true; | |
6167 | ||
6168 | return false; | |
6169 | } | |
6170 | ||
34cf6c43 | 6171 | int exec_context_get_effective_ioprio(const ExecContext *c) { |
7f452159 LP |
6172 | int p; |
6173 | ||
6174 | assert(c); | |
6175 | ||
6176 | if (c->ioprio_set) | |
6177 | return c->ioprio; | |
6178 | ||
6179 | p = ioprio_get(IOPRIO_WHO_PROCESS, 0); | |
6180 | if (p < 0) | |
0692548c | 6181 | return IOPRIO_DEFAULT_CLASS_AND_PRIO; |
7f452159 | 6182 | |
8b330d7d | 6183 | return ioprio_normalize(p); |
7f452159 LP |
6184 | } |
6185 | ||
5e98086d ZJS |
6186 | bool exec_context_get_effective_mount_apivfs(const ExecContext *c) { |
6187 | assert(c); | |
6188 | ||
61198784 | 6189 | /* Explicit setting wins */ |
5e98086d ZJS |
6190 | if (c->mount_apivfs_set) |
6191 | return c->mount_apivfs; | |
6192 | ||
61198784 | 6193 | /* Default to "yes" if root directory or image are specified */ |
74e12520 | 6194 | if (exec_context_with_rootfs(c)) |
61198784 ZJS |
6195 | return true; |
6196 | ||
5e98086d ZJS |
6197 | return false; |
6198 | } | |
6199 | ||
d3070fbd | 6200 | void exec_context_free_log_extra_fields(ExecContext *c) { |
d3070fbd LP |
6201 | assert(c); |
6202 | ||
5b10116e | 6203 | for (size_t l = 0; l < c->n_log_extra_fields; l++) |
d3070fbd LP |
6204 | free(c->log_extra_fields[l].iov_base); |
6205 | c->log_extra_fields = mfree(c->log_extra_fields); | |
6206 | c->n_log_extra_fields = 0; | |
6207 | } | |
6208 | ||
6f765baf | 6209 | void exec_context_revert_tty(ExecContext *c) { |
254d1313 | 6210 | _cleanup_close_ int fd = -EBADF; |
0ba976e8 LP |
6211 | const char *path; |
6212 | struct stat st; | |
6f765baf LP |
6213 | int r; |
6214 | ||
6215 | assert(c); | |
6216 | ||
6217 | /* First, reset the TTY (possibly kicking everybody else from the TTY) */ | |
6218 | exec_context_tty_reset(c, NULL); | |
6219 | ||
6220 | /* And then undo what chown_terminal() did earlier. Note that we only do this if we have a path | |
6221 | * configured. If the TTY was passed to us as file descriptor we assume the TTY is opened and managed | |
6222 | * by whoever passed it to us and thus knows better when and how to chmod()/chown() it back. */ | |
0ba976e8 LP |
6223 | if (!exec_context_may_touch_tty(c)) |
6224 | return; | |
6f765baf | 6225 | |
0ba976e8 LP |
6226 | path = exec_context_tty_path(c); |
6227 | if (!path) | |
6228 | return; | |
6f765baf | 6229 | |
0ba976e8 LP |
6230 | fd = open(path, O_PATH|O_CLOEXEC); |
6231 | if (fd < 0) | |
6232 | return (void) log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno, | |
6233 | "Failed to open TTY inode of '%s' to adjust ownership/access mode, ignoring: %m", | |
6234 | path); | |
6235 | ||
6236 | if (fstat(fd, &st) < 0) | |
6237 | return (void) log_warning_errno(errno, "Failed to stat TTY '%s', ignoring: %m", path); | |
6238 | ||
6239 | /* Let's add a superficial check that we only do this for stuff that looks like a TTY. We only check | |
6240 | * if things are a character device, since a proper check either means we'd have to open the TTY and | |
6241 | * use isatty(), but we'd rather not do that since opening TTYs comes with all kinds of side-effects | |
6242 | * and is slow. Or we'd have to hardcode dev_t major information, which we'd rather avoid. Why bother | |
6243 | * with this at all? → https://github.com/systemd/systemd/issues/19213 */ | |
6244 | if (!S_ISCHR(st.st_mode)) | |
6245 | return log_warning("Configured TTY '%s' is not actually a character device, ignoring.", path); | |
6246 | ||
6247 | r = fchmod_and_chown(fd, TTY_MODE, 0, TTY_GID); | |
6248 | if (r < 0) | |
6249 | log_warning_errno(r, "Failed to reset TTY ownership/access mode of %s, ignoring: %m", path); | |
6f765baf LP |
6250 | } |
6251 | ||
4c2f5842 LP |
6252 | int exec_context_get_clean_directories( |
6253 | ExecContext *c, | |
6254 | char **prefix, | |
6255 | ExecCleanMask mask, | |
6256 | char ***ret) { | |
6257 | ||
6258 | _cleanup_strv_free_ char **l = NULL; | |
4c2f5842 LP |
6259 | int r; |
6260 | ||
6261 | assert(c); | |
6262 | assert(prefix); | |
6263 | assert(ret); | |
6264 | ||
5b10116e | 6265 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) { |
4c2f5842 LP |
6266 | if (!FLAGS_SET(mask, 1U << t)) |
6267 | continue; | |
6268 | ||
6269 | if (!prefix[t]) | |
6270 | continue; | |
6271 | ||
211a3d87 | 6272 | for (size_t i = 0; i < c->directories[t].n_items; i++) { |
4c2f5842 LP |
6273 | char *j; |
6274 | ||
211a3d87 | 6275 | j = path_join(prefix[t], c->directories[t].items[i].path); |
4c2f5842 LP |
6276 | if (!j) |
6277 | return -ENOMEM; | |
6278 | ||
6279 | r = strv_consume(&l, j); | |
6280 | if (r < 0) | |
6281 | return r; | |
7f622a19 YW |
6282 | |
6283 | /* Also remove private directories unconditionally. */ | |
6284 | if (t != EXEC_DIRECTORY_CONFIGURATION) { | |
211a3d87 LB |
6285 | j = path_join(prefix[t], "private", c->directories[t].items[i].path); |
6286 | if (!j) | |
6287 | return -ENOMEM; | |
6288 | ||
6289 | r = strv_consume(&l, j); | |
6290 | if (r < 0) | |
6291 | return r; | |
6292 | } | |
6293 | ||
211a3d87 LB |
6294 | STRV_FOREACH(symlink, c->directories[t].items[i].symlinks) { |
6295 | j = path_join(prefix[t], *symlink); | |
7f622a19 YW |
6296 | if (!j) |
6297 | return -ENOMEM; | |
6298 | ||
6299 | r = strv_consume(&l, j); | |
6300 | if (r < 0) | |
6301 | return r; | |
6302 | } | |
4c2f5842 LP |
6303 | } |
6304 | } | |
6305 | ||
6306 | *ret = TAKE_PTR(l); | |
6307 | return 0; | |
6308 | } | |
6309 | ||
6310 | int exec_context_get_clean_mask(ExecContext *c, ExecCleanMask *ret) { | |
6311 | ExecCleanMask mask = 0; | |
6312 | ||
6313 | assert(c); | |
6314 | assert(ret); | |
6315 | ||
6316 | for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) | |
211a3d87 | 6317 | if (c->directories[t].n_items > 0) |
4c2f5842 LP |
6318 | mask |= 1U << t; |
6319 | ||
6320 | *ret = mask; | |
6321 | return 0; | |
6322 | } | |
6323 | ||
b58b4116 | 6324 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 6325 | assert(s); |
5cb5a6ff | 6326 | |
2ed26ed0 LP |
6327 | *s = (ExecStatus) { |
6328 | .pid = pid, | |
6329 | }; | |
6330 | ||
b58b4116 LP |
6331 | dual_timestamp_get(&s->start_timestamp); |
6332 | } | |
6333 | ||
34cf6c43 | 6334 | void exec_status_exit(ExecStatus *s, const ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
6335 | assert(s); |
6336 | ||
d46b79bb | 6337 | if (s->pid != pid) |
2ed26ed0 LP |
6338 | *s = (ExecStatus) { |
6339 | .pid = pid, | |
6340 | }; | |
b58b4116 | 6341 | |
63983207 | 6342 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 6343 | |
034c6ed7 LP |
6344 | s->code = code; |
6345 | s->status = status; | |
169c1bda | 6346 | |
6f765baf LP |
6347 | if (context && context->utmp_id) |
6348 | (void) utmp_put_dead_process(context->utmp_id, pid, code, status); | |
9fb86720 LP |
6349 | } |
6350 | ||
6a1d4d9f LP |
6351 | void exec_status_reset(ExecStatus *s) { |
6352 | assert(s); | |
6353 | ||
6354 | *s = (ExecStatus) {}; | |
6355 | } | |
6356 | ||
34cf6c43 | 6357 | void exec_status_dump(const ExecStatus *s, FILE *f, const char *prefix) { |
9fb86720 LP |
6358 | assert(s); |
6359 | assert(f); | |
6360 | ||
9fb86720 LP |
6361 | if (s->pid <= 0) |
6362 | return; | |
6363 | ||
4c940960 LP |
6364 | prefix = strempty(prefix); |
6365 | ||
9fb86720 | 6366 | fprintf(f, |
ccd06097 ZJS |
6367 | "%sPID: "PID_FMT"\n", |
6368 | prefix, s->pid); | |
9fb86720 | 6369 | |
af9d16e1 | 6370 | if (dual_timestamp_is_set(&s->start_timestamp)) |
9fb86720 LP |
6371 | fprintf(f, |
6372 | "%sStart Timestamp: %s\n", | |
04f5c018 | 6373 | prefix, FORMAT_TIMESTAMP(s->start_timestamp.realtime)); |
9fb86720 | 6374 | |
af9d16e1 | 6375 | if (dual_timestamp_is_set(&s->exit_timestamp)) |
9fb86720 LP |
6376 | fprintf(f, |
6377 | "%sExit Timestamp: %s\n" | |
6378 | "%sExit Code: %s\n" | |
6379 | "%sExit Status: %i\n", | |
04f5c018 | 6380 | prefix, FORMAT_TIMESTAMP(s->exit_timestamp.realtime), |
9fb86720 LP |
6381 | prefix, sigchld_code_to_string(s->code), |
6382 | prefix, s->status); | |
5cb5a6ff | 6383 | } |
44d8db9e | 6384 | |
34cf6c43 | 6385 | static void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { |
e1d75803 | 6386 | _cleanup_free_ char *cmd = NULL; |
4c940960 | 6387 | const char *prefix2; |
44d8db9e LP |
6388 | |
6389 | assert(c); | |
6390 | assert(f); | |
6391 | ||
4c940960 | 6392 | prefix = strempty(prefix); |
63c372cb | 6393 | prefix2 = strjoina(prefix, "\t"); |
44d8db9e | 6394 | |
4ef15008 | 6395 | cmd = quote_command_line(c->argv, SHELL_ESCAPE_EMPTY); |
38553034 | 6396 | |
44d8db9e LP |
6397 | fprintf(f, |
6398 | "%sCommand Line: %s\n", | |
38553034 | 6399 | prefix, strnull(cmd)); |
44d8db9e | 6400 | |
9fb86720 | 6401 | exec_status_dump(&c->exec_status, f, prefix2); |
44d8db9e LP |
6402 | } |
6403 | ||
6404 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
6405 | assert(f); | |
6406 | ||
4c940960 | 6407 | prefix = strempty(prefix); |
44d8db9e | 6408 | |
03677889 YW |
6409 | LIST_FOREACH(command, i, c) |
6410 | exec_command_dump(i, f, prefix); | |
44d8db9e | 6411 | } |
94f04347 | 6412 | |
a6a80b4f LP |
6413 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
6414 | ExecCommand *end; | |
6415 | ||
6416 | assert(l); | |
6417 | assert(e); | |
6418 | ||
6419 | if (*l) { | |
35b8ca3a | 6420 | /* It's kind of important, that we keep the order here */ |
cc232fa0 | 6421 | end = LIST_FIND_TAIL(command, *l); |
71fda00f | 6422 | LIST_INSERT_AFTER(command, *l, end, e); |
a6a80b4f | 6423 | } else |
3ff67ec4 | 6424 | *l = e; |
a6a80b4f LP |
6425 | } |
6426 | ||
26fd040d LP |
6427 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
6428 | va_list ap; | |
6429 | char **l, *p; | |
6430 | ||
6431 | assert(c); | |
6432 | assert(path); | |
6433 | ||
6434 | va_start(ap, path); | |
6435 | l = strv_new_ap(path, ap); | |
6436 | va_end(ap); | |
6437 | ||
6438 | if (!l) | |
6439 | return -ENOMEM; | |
6440 | ||
250a918d LP |
6441 | p = strdup(path); |
6442 | if (!p) { | |
26fd040d LP |
6443 | strv_free(l); |
6444 | return -ENOMEM; | |
6445 | } | |
6446 | ||
6897dfe8 | 6447 | free_and_replace(c->path, p); |
26fd040d | 6448 | |
130d3d22 | 6449 | return strv_free_and_replace(c->argv, l); |
26fd040d LP |
6450 | } |
6451 | ||
86b23b07 | 6452 | int exec_command_append(ExecCommand *c, const char *path, ...) { |
e63ff941 | 6453 | _cleanup_strv_free_ char **l = NULL; |
86b23b07 | 6454 | va_list ap; |
86b23b07 JS |
6455 | int r; |
6456 | ||
6457 | assert(c); | |
6458 | assert(path); | |
6459 | ||
6460 | va_start(ap, path); | |
6461 | l = strv_new_ap(path, ap); | |
6462 | va_end(ap); | |
6463 | ||
6464 | if (!l) | |
6465 | return -ENOMEM; | |
6466 | ||
e287086b | 6467 | r = strv_extend_strv(&c->argv, l, false); |
e63ff941 | 6468 | if (r < 0) |
86b23b07 | 6469 | return r; |
86b23b07 JS |
6470 | |
6471 | return 0; | |
6472 | } | |
6473 | ||
437f3e35 LP |
6474 | static char *destroy_tree(char *path) { |
6475 | if (!path) | |
6476 | return NULL; | |
9c0c6701 | 6477 | |
437f3e35 LP |
6478 | if (!path_equal(path, RUN_SYSTEMD_EMPTY)) { |
6479 | log_debug("Spawning process to nuke '%s'", path); | |
9c0c6701 | 6480 | |
437f3e35 LP |
6481 | (void) asynchronous_rm_rf(path, REMOVE_ROOT|REMOVE_SUBVOLUME|REMOVE_PHYSICAL); |
6482 | } | |
9c0c6701 | 6483 | |
437f3e35 | 6484 | return mfree(path); |
9c0c6701 DDM |
6485 | } |
6486 | ||
e52a696a | 6487 | static ExecSharedRuntime* exec_shared_runtime_free(ExecSharedRuntime *rt) { |
e8a565cb YW |
6488 | if (!rt) |
6489 | return NULL; | |
6490 | ||
6491 | if (rt->manager) | |
e76506b7 | 6492 | (void) hashmap_remove(rt->manager->exec_shared_runtime_by_id, rt->id); |
e8a565cb | 6493 | |
e52a696a DDM |
6494 | rt->id = mfree(rt->id); |
6495 | rt->tmp_dir = mfree(rt->tmp_dir); | |
6496 | rt->var_tmp_dir = mfree(rt->var_tmp_dir); | |
6497 | safe_close_pair(rt->netns_storage_socket); | |
6498 | safe_close_pair(rt->ipcns_storage_socket); | |
6499 | return mfree(rt); | |
6500 | } | |
6501 | ||
6502 | DEFINE_TRIVIAL_UNREF_FUNC(ExecSharedRuntime, exec_shared_runtime, exec_shared_runtime_free); | |
6503 | DEFINE_TRIVIAL_CLEANUP_FUNC(ExecSharedRuntime*, exec_shared_runtime_free); | |
6504 | ||
6505 | ExecSharedRuntime* exec_shared_runtime_destroy(ExecSharedRuntime *rt) { | |
e52a696a DDM |
6506 | if (!rt) |
6507 | return NULL; | |
6508 | ||
6509 | assert(rt->n_ref > 0); | |
6510 | rt->n_ref--; | |
6511 | ||
6512 | if (rt->n_ref > 0) | |
6513 | return NULL; | |
56a13a49 | 6514 | |
437f3e35 LP |
6515 | rt->tmp_dir = destroy_tree(rt->tmp_dir); |
6516 | rt->var_tmp_dir = destroy_tree(rt->var_tmp_dir); | |
e8a565cb | 6517 | |
e52a696a | 6518 | return exec_shared_runtime_free(rt); |
e8a565cb YW |
6519 | } |
6520 | ||
e76506b7 | 6521 | static int exec_shared_runtime_allocate(ExecSharedRuntime **ret, const char *id) { |
56a13a49 | 6522 | _cleanup_free_ char *id_copy = NULL; |
e76506b7 | 6523 | ExecSharedRuntime *n; |
613b411c | 6524 | |
8e8009dc | 6525 | assert(ret); |
613b411c | 6526 | |
56a13a49 ZJS |
6527 | id_copy = strdup(id); |
6528 | if (!id_copy) | |
6529 | return -ENOMEM; | |
6530 | ||
e76506b7 | 6531 | n = new(ExecSharedRuntime, 1); |
8e8009dc | 6532 | if (!n) |
613b411c LP |
6533 | return -ENOMEM; |
6534 | ||
e76506b7 | 6535 | *n = (ExecSharedRuntime) { |
56a13a49 | 6536 | .id = TAKE_PTR(id_copy), |
19ee48a6 YW |
6537 | .netns_storage_socket = PIPE_EBADF, |
6538 | .ipcns_storage_socket = PIPE_EBADF, | |
8e8009dc LP |
6539 | }; |
6540 | ||
6541 | *ret = n; | |
613b411c LP |
6542 | return 0; |
6543 | } | |
6544 | ||
e76506b7 | 6545 | static int exec_shared_runtime_add( |
e8a565cb YW |
6546 | Manager *m, |
6547 | const char *id, | |
56a13a49 ZJS |
6548 | char **tmp_dir, |
6549 | char **var_tmp_dir, | |
6550 | int netns_storage_socket[2], | |
a70581ff | 6551 | int ipcns_storage_socket[2], |
e76506b7 | 6552 | ExecSharedRuntime **ret) { |
e8a565cb | 6553 | |
e76506b7 | 6554 | _cleanup_(exec_shared_runtime_freep) ExecSharedRuntime *rt = NULL; |
613b411c LP |
6555 | int r; |
6556 | ||
e8a565cb | 6557 | assert(m); |
613b411c LP |
6558 | assert(id); |
6559 | ||
a70581ff | 6560 | /* tmp_dir, var_tmp_dir, {net,ipc}ns_storage_socket fds are donated on success */ |
56a13a49 | 6561 | |
e76506b7 | 6562 | r = exec_shared_runtime_allocate(&rt, id); |
613b411c LP |
6563 | if (r < 0) |
6564 | return r; | |
6565 | ||
e76506b7 | 6566 | r = hashmap_ensure_put(&m->exec_shared_runtime_by_id, &string_hash_ops, rt->id, rt); |
56a13a49 ZJS |
6567 | if (r < 0) |
6568 | return r; | |
e8a565cb | 6569 | |
56a13a49 ZJS |
6570 | assert(!!rt->tmp_dir == !!rt->var_tmp_dir); /* We require both to be set together */ |
6571 | rt->tmp_dir = TAKE_PTR(*tmp_dir); | |
6572 | rt->var_tmp_dir = TAKE_PTR(*var_tmp_dir); | |
e8a565cb YW |
6573 | |
6574 | if (netns_storage_socket) { | |
56a13a49 ZJS |
6575 | rt->netns_storage_socket[0] = TAKE_FD(netns_storage_socket[0]); |
6576 | rt->netns_storage_socket[1] = TAKE_FD(netns_storage_socket[1]); | |
613b411c LP |
6577 | } |
6578 | ||
a70581ff XR |
6579 | if (ipcns_storage_socket) { |
6580 | rt->ipcns_storage_socket[0] = TAKE_FD(ipcns_storage_socket[0]); | |
6581 | rt->ipcns_storage_socket[1] = TAKE_FD(ipcns_storage_socket[1]); | |
6582 | } | |
6583 | ||
e8a565cb YW |
6584 | rt->manager = m; |
6585 | ||
6586 | if (ret) | |
6587 | *ret = rt; | |
e76506b7 | 6588 | /* do not remove created ExecSharedRuntime object when the operation succeeds. */ |
56a13a49 | 6589 | TAKE_PTR(rt); |
e8a565cb YW |
6590 | return 0; |
6591 | } | |
6592 | ||
e76506b7 | 6593 | static int exec_shared_runtime_make( |
74aaf59b LP |
6594 | Manager *m, |
6595 | const ExecContext *c, | |
6596 | const char *id, | |
e76506b7 | 6597 | ExecSharedRuntime **ret) { |
74aaf59b | 6598 | |
56a13a49 | 6599 | _cleanup_(namespace_cleanup_tmpdirp) char *tmp_dir = NULL, *var_tmp_dir = NULL; |
19ee48a6 | 6600 | _cleanup_close_pair_ int netns_storage_socket[2] = PIPE_EBADF, ipcns_storage_socket[2] = PIPE_EBADF; |
e8a565cb YW |
6601 | int r; |
6602 | ||
6603 | assert(m); | |
6604 | assert(c); | |
6605 | assert(id); | |
6606 | ||
e76506b7 | 6607 | /* It is not necessary to create ExecSharedRuntime object. */ |
fde36d25 | 6608 | if (!exec_needs_network_namespace(c) && !exec_needs_ipc_namespace(c) && !c->private_tmp) { |
74aaf59b | 6609 | *ret = NULL; |
e8a565cb | 6610 | return 0; |
74aaf59b | 6611 | } |
e8a565cb | 6612 | |
efa2f3a1 TM |
6613 | if (c->private_tmp && |
6614 | !(prefixed_path_strv_contains(c->inaccessible_paths, "/tmp") && | |
6615 | (prefixed_path_strv_contains(c->inaccessible_paths, "/var/tmp") || | |
6616 | prefixed_path_strv_contains(c->inaccessible_paths, "/var")))) { | |
e8a565cb | 6617 | r = setup_tmp_dirs(id, &tmp_dir, &var_tmp_dir); |
613b411c LP |
6618 | if (r < 0) |
6619 | return r; | |
6620 | } | |
6621 | ||
fbbb9697 | 6622 | if (exec_needs_network_namespace(c)) { |
e8a565cb YW |
6623 | if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, netns_storage_socket) < 0) |
6624 | return -errno; | |
6625 | } | |
6626 | ||
fde36d25 | 6627 | if (exec_needs_ipc_namespace(c)) { |
a70581ff XR |
6628 | if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, ipcns_storage_socket) < 0) |
6629 | return -errno; | |
6630 | } | |
6631 | ||
e76506b7 | 6632 | r = exec_shared_runtime_add(m, id, &tmp_dir, &var_tmp_dir, netns_storage_socket, ipcns_storage_socket, ret); |
e8a565cb YW |
6633 | if (r < 0) |
6634 | return r; | |
6635 | ||
613b411c LP |
6636 | return 1; |
6637 | } | |
6638 | ||
e76506b7 DDM |
6639 | int exec_shared_runtime_acquire(Manager *m, const ExecContext *c, const char *id, bool create, ExecSharedRuntime **ret) { |
6640 | ExecSharedRuntime *rt; | |
e8a565cb | 6641 | int r; |
613b411c | 6642 | |
e8a565cb YW |
6643 | assert(m); |
6644 | assert(id); | |
6645 | assert(ret); | |
6646 | ||
e76506b7 | 6647 | rt = hashmap_get(m->exec_shared_runtime_by_id, id); |
e8a565cb | 6648 | if (rt) |
e76506b7 | 6649 | /* We already have an ExecSharedRuntime object, let's increase the ref count and reuse it */ |
e8a565cb YW |
6650 | goto ref; |
6651 | ||
74aaf59b LP |
6652 | if (!create) { |
6653 | *ret = NULL; | |
e8a565cb | 6654 | return 0; |
74aaf59b | 6655 | } |
e8a565cb YW |
6656 | |
6657 | /* If not found, then create a new object. */ | |
e76506b7 | 6658 | r = exec_shared_runtime_make(m, c, id, &rt); |
74aaf59b | 6659 | if (r < 0) |
e8a565cb | 6660 | return r; |
74aaf59b | 6661 | if (r == 0) { |
e76506b7 | 6662 | /* When r == 0, it is not necessary to create ExecSharedRuntime object. */ |
74aaf59b LP |
6663 | *ret = NULL; |
6664 | return 0; | |
6665 | } | |
613b411c | 6666 | |
e8a565cb YW |
6667 | ref: |
6668 | /* increment reference counter. */ | |
6669 | rt->n_ref++; | |
6670 | *ret = rt; | |
6671 | return 1; | |
6672 | } | |
613b411c | 6673 | |
e76506b7 DDM |
6674 | int exec_shared_runtime_serialize(const Manager *m, FILE *f, FDSet *fds) { |
6675 | ExecSharedRuntime *rt; | |
e8a565cb YW |
6676 | |
6677 | assert(m); | |
613b411c LP |
6678 | assert(f); |
6679 | assert(fds); | |
6680 | ||
e76506b7 | 6681 | HASHMAP_FOREACH(rt, m->exec_shared_runtime_by_id) { |
e8a565cb | 6682 | fprintf(f, "exec-runtime=%s", rt->id); |
613b411c | 6683 | |
e8a565cb YW |
6684 | if (rt->tmp_dir) |
6685 | fprintf(f, " tmp-dir=%s", rt->tmp_dir); | |
613b411c | 6686 | |
e8a565cb YW |
6687 | if (rt->var_tmp_dir) |
6688 | fprintf(f, " var-tmp-dir=%s", rt->var_tmp_dir); | |
613b411c | 6689 | |
e8a565cb YW |
6690 | if (rt->netns_storage_socket[0] >= 0) { |
6691 | int copy; | |
613b411c | 6692 | |
e8a565cb YW |
6693 | copy = fdset_put_dup(fds, rt->netns_storage_socket[0]); |
6694 | if (copy < 0) | |
6695 | return copy; | |
613b411c | 6696 | |
e8a565cb YW |
6697 | fprintf(f, " netns-socket-0=%i", copy); |
6698 | } | |
613b411c | 6699 | |
e8a565cb YW |
6700 | if (rt->netns_storage_socket[1] >= 0) { |
6701 | int copy; | |
613b411c | 6702 | |
e8a565cb YW |
6703 | copy = fdset_put_dup(fds, rt->netns_storage_socket[1]); |
6704 | if (copy < 0) | |
6705 | return copy; | |
613b411c | 6706 | |
e8a565cb YW |
6707 | fprintf(f, " netns-socket-1=%i", copy); |
6708 | } | |
6709 | ||
a70581ff XR |
6710 | if (rt->ipcns_storage_socket[0] >= 0) { |
6711 | int copy; | |
6712 | ||
6713 | copy = fdset_put_dup(fds, rt->ipcns_storage_socket[0]); | |
6714 | if (copy < 0) | |
6715 | return copy; | |
6716 | ||
6717 | fprintf(f, " ipcns-socket-0=%i", copy); | |
6718 | } | |
6719 | ||
6720 | if (rt->ipcns_storage_socket[1] >= 0) { | |
6721 | int copy; | |
6722 | ||
6723 | copy = fdset_put_dup(fds, rt->ipcns_storage_socket[1]); | |
6724 | if (copy < 0) | |
6725 | return copy; | |
6726 | ||
6727 | fprintf(f, " ipcns-socket-1=%i", copy); | |
6728 | } | |
6729 | ||
e8a565cb | 6730 | fputc('\n', f); |
613b411c LP |
6731 | } |
6732 | ||
6733 | return 0; | |
6734 | } | |
6735 | ||
e76506b7 DDM |
6736 | int exec_shared_runtime_deserialize_compat(Unit *u, const char *key, const char *value, FDSet *fds) { |
6737 | _cleanup_(exec_shared_runtime_freep) ExecSharedRuntime *rt_create = NULL; | |
6738 | ExecSharedRuntime *rt; | |
613b411c LP |
6739 | int r; |
6740 | ||
e8a565cb YW |
6741 | /* This is for the migration from old (v237 or earlier) deserialization text. |
6742 | * Due to the bug #7790, this may not work with the units that use JoinsNamespaceOf=. | |
e76506b7 | 6743 | * Even if the ExecSharedRuntime object originally created by the other unit, we cannot judge |
e8a565cb YW |
6744 | * so or not from the serialized text, then we always creates a new object owned by this. */ |
6745 | ||
6746 | assert(u); | |
613b411c LP |
6747 | assert(key); |
6748 | assert(value); | |
6749 | ||
e76506b7 | 6750 | /* Manager manages ExecSharedRuntime objects by the unit id. |
e8a565cb YW |
6751 | * So, we omit the serialized text when the unit does not have id (yet?)... */ |
6752 | if (isempty(u->id)) { | |
6753 | log_unit_debug(u, "Invocation ID not found. Dropping runtime parameter."); | |
6754 | return 0; | |
6755 | } | |
613b411c | 6756 | |
e76506b7 | 6757 | if (hashmap_ensure_allocated(&u->manager->exec_shared_runtime_by_id, &string_hash_ops) < 0) |
cbc165d1 | 6758 | return log_oom(); |
e8a565cb | 6759 | |
e76506b7 | 6760 | rt = hashmap_get(u->manager->exec_shared_runtime_by_id, u->id); |
e8a565cb | 6761 | if (!rt) { |
e76506b7 | 6762 | if (exec_shared_runtime_allocate(&rt_create, u->id) < 0) |
f2341e0a | 6763 | return log_oom(); |
613b411c | 6764 | |
e8a565cb YW |
6765 | rt = rt_create; |
6766 | } | |
6767 | ||
6768 | if (streq(key, "tmp-dir")) { | |
cbc165d1 ZJS |
6769 | if (free_and_strdup_warn(&rt->tmp_dir, value) < 0) |
6770 | return -ENOMEM; | |
613b411c LP |
6771 | |
6772 | } else if (streq(key, "var-tmp-dir")) { | |
cbc165d1 ZJS |
6773 | if (free_and_strdup_warn(&rt->var_tmp_dir, value) < 0) |
6774 | return -ENOMEM; | |
613b411c LP |
6775 | |
6776 | } else if (streq(key, "netns-socket-0")) { | |
6777 | int fd; | |
6778 | ||
e652663a | 6779 | if ((fd = parse_fd(value)) < 0 || !fdset_contains(fds, fd)) { |
f2341e0a | 6780 | log_unit_debug(u, "Failed to parse netns socket value: %s", value); |
e8a565cb | 6781 | return 0; |
613b411c | 6782 | } |
e8a565cb YW |
6783 | |
6784 | safe_close(rt->netns_storage_socket[0]); | |
6785 | rt->netns_storage_socket[0] = fdset_remove(fds, fd); | |
6786 | ||
613b411c LP |
6787 | } else if (streq(key, "netns-socket-1")) { |
6788 | int fd; | |
6789 | ||
e652663a | 6790 | if ((fd = parse_fd(value)) < 0 || !fdset_contains(fds, fd)) { |
f2341e0a | 6791 | log_unit_debug(u, "Failed to parse netns socket value: %s", value); |
e8a565cb | 6792 | return 0; |
613b411c | 6793 | } |
e8a565cb YW |
6794 | |
6795 | safe_close(rt->netns_storage_socket[1]); | |
6796 | rt->netns_storage_socket[1] = fdset_remove(fds, fd); | |
a70581ff | 6797 | |
613b411c LP |
6798 | } else |
6799 | return 0; | |
6800 | ||
e76506b7 | 6801 | /* If the object is newly created, then put it to the hashmap which manages ExecSharedRuntime objects. */ |
e8a565cb | 6802 | if (rt_create) { |
e76506b7 | 6803 | r = hashmap_put(u->manager->exec_shared_runtime_by_id, rt_create->id, rt_create); |
e8a565cb | 6804 | if (r < 0) { |
3fe91079 | 6805 | log_unit_debug_errno(u, r, "Failed to put runtime parameter to manager's storage: %m"); |
e8a565cb YW |
6806 | return 0; |
6807 | } | |
613b411c | 6808 | |
e8a565cb | 6809 | rt_create->manager = u->manager; |
613b411c | 6810 | |
e8a565cb | 6811 | /* Avoid cleanup */ |
56a13a49 | 6812 | TAKE_PTR(rt_create); |
e8a565cb | 6813 | } |
98b47d54 | 6814 | |
e8a565cb YW |
6815 | return 1; |
6816 | } | |
613b411c | 6817 | |
e76506b7 | 6818 | int exec_shared_runtime_deserialize_one(Manager *m, const char *value, FDSet *fds) { |
56a13a49 ZJS |
6819 | _cleanup_free_ char *tmp_dir = NULL, *var_tmp_dir = NULL; |
6820 | char *id = NULL; | |
a70581ff | 6821 | int r, netns_fdpair[] = {-1, -1}, ipcns_fdpair[] = {-1, -1}; |
99534007 | 6822 | const char *p, *v = ASSERT_PTR(value); |
e8a565cb | 6823 | size_t n; |
613b411c | 6824 | |
e8a565cb | 6825 | assert(m); |
e8a565cb | 6826 | assert(fds); |
98b47d54 | 6827 | |
e8a565cb | 6828 | n = strcspn(v, " "); |
2f82562b | 6829 | id = strndupa_safe(v, n); |
e8a565cb YW |
6830 | if (v[n] != ' ') |
6831 | goto finalize; | |
6832 | p = v + n + 1; | |
6833 | ||
6834 | v = startswith(p, "tmp-dir="); | |
6835 | if (v) { | |
6836 | n = strcspn(v, " "); | |
56a13a49 ZJS |
6837 | tmp_dir = strndup(v, n); |
6838 | if (!tmp_dir) | |
6839 | return log_oom(); | |
e8a565cb YW |
6840 | if (v[n] != ' ') |
6841 | goto finalize; | |
6842 | p = v + n + 1; | |
6843 | } | |
6844 | ||
6845 | v = startswith(p, "var-tmp-dir="); | |
6846 | if (v) { | |
6847 | n = strcspn(v, " "); | |
56a13a49 ZJS |
6848 | var_tmp_dir = strndup(v, n); |
6849 | if (!var_tmp_dir) | |
6850 | return log_oom(); | |
e8a565cb YW |
6851 | if (v[n] != ' ') |
6852 | goto finalize; | |
6853 | p = v + n + 1; | |
6854 | } | |
6855 | ||
6856 | v = startswith(p, "netns-socket-0="); | |
6857 | if (v) { | |
6858 | char *buf; | |
6859 | ||
6860 | n = strcspn(v, " "); | |
2f82562b | 6861 | buf = strndupa_safe(v, n); |
c413bb28 | 6862 | |
e652663a DT |
6863 | netns_fdpair[0] = parse_fd(buf); |
6864 | if (netns_fdpair[0] < 0) | |
6865 | return log_debug_errno(netns_fdpair[0], "Unable to parse exec-runtime specification netns-socket-0=%s: %m", buf); | |
a70581ff | 6866 | if (!fdset_contains(fds, netns_fdpair[0])) |
c413bb28 | 6867 | return log_debug_errno(SYNTHETIC_ERRNO(EBADF), |
a70581ff XR |
6868 | "exec-runtime specification netns-socket-0= refers to unknown fd %d: %m", netns_fdpair[0]); |
6869 | netns_fdpair[0] = fdset_remove(fds, netns_fdpair[0]); | |
e8a565cb YW |
6870 | if (v[n] != ' ') |
6871 | goto finalize; | |
6872 | p = v + n + 1; | |
613b411c LP |
6873 | } |
6874 | ||
e8a565cb YW |
6875 | v = startswith(p, "netns-socket-1="); |
6876 | if (v) { | |
6877 | char *buf; | |
98b47d54 | 6878 | |
e8a565cb | 6879 | n = strcspn(v, " "); |
2f82562b | 6880 | buf = strndupa_safe(v, n); |
a70581ff | 6881 | |
e652663a DT |
6882 | netns_fdpair[1] = parse_fd(buf); |
6883 | if (netns_fdpair[1] < 0) | |
6884 | return log_debug_errno(netns_fdpair[1], "Unable to parse exec-runtime specification netns-socket-1=%s: %m", buf); | |
a70581ff XR |
6885 | if (!fdset_contains(fds, netns_fdpair[1])) |
6886 | return log_debug_errno(SYNTHETIC_ERRNO(EBADF), | |
6887 | "exec-runtime specification netns-socket-1= refers to unknown fd %d: %m", netns_fdpair[1]); | |
6888 | netns_fdpair[1] = fdset_remove(fds, netns_fdpair[1]); | |
6889 | if (v[n] != ' ') | |
6890 | goto finalize; | |
6891 | p = v + n + 1; | |
6892 | } | |
6893 | ||
6894 | v = startswith(p, "ipcns-socket-0="); | |
6895 | if (v) { | |
6896 | char *buf; | |
6897 | ||
6898 | n = strcspn(v, " "); | |
2f82562b | 6899 | buf = strndupa_safe(v, n); |
a70581ff | 6900 | |
e652663a DT |
6901 | ipcns_fdpair[0] = parse_fd(buf); |
6902 | if (ipcns_fdpair[0] < 0) | |
6903 | return log_debug_errno(ipcns_fdpair[0], "Unable to parse exec-runtime specification ipcns-socket-0=%s: %m", buf); | |
a70581ff XR |
6904 | if (!fdset_contains(fds, ipcns_fdpair[0])) |
6905 | return log_debug_errno(SYNTHETIC_ERRNO(EBADF), | |
6906 | "exec-runtime specification ipcns-socket-0= refers to unknown fd %d: %m", ipcns_fdpair[0]); | |
6907 | ipcns_fdpair[0] = fdset_remove(fds, ipcns_fdpair[0]); | |
6908 | if (v[n] != ' ') | |
6909 | goto finalize; | |
6910 | p = v + n + 1; | |
6911 | } | |
6912 | ||
6913 | v = startswith(p, "ipcns-socket-1="); | |
6914 | if (v) { | |
6915 | char *buf; | |
6916 | ||
6917 | n = strcspn(v, " "); | |
2f82562b | 6918 | buf = strndupa_safe(v, n); |
a70581ff | 6919 | |
e652663a DT |
6920 | ipcns_fdpair[1] = parse_fd(buf); |
6921 | if (ipcns_fdpair[1] < 0) | |
6922 | return log_debug_errno(ipcns_fdpair[1], "Unable to parse exec-runtime specification ipcns-socket-1=%s: %m", buf); | |
a70581ff | 6923 | if (!fdset_contains(fds, ipcns_fdpair[1])) |
c413bb28 | 6924 | return log_debug_errno(SYNTHETIC_ERRNO(EBADF), |
a70581ff XR |
6925 | "exec-runtime specification ipcns-socket-1= refers to unknown fd %d: %m", ipcns_fdpair[1]); |
6926 | ipcns_fdpair[1] = fdset_remove(fds, ipcns_fdpair[1]); | |
e8a565cb | 6927 | } |
98b47d54 | 6928 | |
e8a565cb | 6929 | finalize: |
e76506b7 | 6930 | r = exec_shared_runtime_add(m, id, &tmp_dir, &var_tmp_dir, netns_fdpair, ipcns_fdpair, NULL); |
7d853ca6 | 6931 | if (r < 0) |
56a13a49 ZJS |
6932 | return log_debug_errno(r, "Failed to add exec-runtime: %m"); |
6933 | return 0; | |
e8a565cb | 6934 | } |
613b411c | 6935 | |
e76506b7 DDM |
6936 | void exec_shared_runtime_vacuum(Manager *m) { |
6937 | ExecSharedRuntime *rt; | |
e8a565cb YW |
6938 | |
6939 | assert(m); | |
6940 | ||
e76506b7 | 6941 | /* Free unreferenced ExecSharedRuntime objects. This is used after manager deserialization process. */ |
e8a565cb | 6942 | |
e76506b7 | 6943 | HASHMAP_FOREACH(rt, m->exec_shared_runtime_by_id) { |
e8a565cb YW |
6944 | if (rt->n_ref > 0) |
6945 | continue; | |
6946 | ||
e52a696a | 6947 | (void) exec_shared_runtime_free(rt); |
e8a565cb | 6948 | } |
613b411c LP |
6949 | } |
6950 | ||
9c0c6701 DDM |
6951 | int exec_runtime_make( |
6952 | const Unit *unit, | |
6953 | const ExecContext *context, | |
6954 | ExecSharedRuntime *shared, | |
6955 | DynamicCreds *creds, | |
6956 | ExecRuntime **ret) { | |
6957 | _cleanup_close_pair_ int ephemeral_storage_socket[2] = PIPE_EBADF; | |
6958 | _cleanup_free_ char *ephemeral = NULL; | |
28135da3 | 6959 | _cleanup_(exec_runtime_freep) ExecRuntime *rt = NULL; |
9c0c6701 | 6960 | int r; |
28135da3 | 6961 | |
9c0c6701 DDM |
6962 | assert(unit); |
6963 | assert(context); | |
28135da3 DDM |
6964 | assert(ret); |
6965 | ||
9c0c6701 | 6966 | if (!shared && !creds && !exec_needs_ephemeral(context)) { |
28135da3 DDM |
6967 | *ret = NULL; |
6968 | return 0; | |
6969 | } | |
6970 | ||
9c0c6701 DDM |
6971 | if (exec_needs_ephemeral(context)) { |
6972 | r = mkdir_p("/var/lib/systemd/ephemeral-trees", 0755); | |
6973 | if (r < 0) | |
6974 | return r; | |
6975 | ||
6976 | r = tempfn_random_child("/var/lib/systemd/ephemeral-trees", unit->id, &ephemeral); | |
6977 | if (r < 0) | |
6978 | return r; | |
6979 | ||
6980 | if (socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, ephemeral_storage_socket) < 0) | |
6981 | return -errno; | |
6982 | } | |
6983 | ||
28135da3 DDM |
6984 | rt = new(ExecRuntime, 1); |
6985 | if (!rt) | |
6986 | return -ENOMEM; | |
6987 | ||
6988 | *rt = (ExecRuntime) { | |
6989 | .shared = shared, | |
15220772 | 6990 | .dynamic_creds = creds, |
9c0c6701 DDM |
6991 | .ephemeral_copy = TAKE_PTR(ephemeral), |
6992 | .ephemeral_storage_socket[0] = TAKE_FD(ephemeral_storage_socket[0]), | |
6993 | .ephemeral_storage_socket[1] = TAKE_FD(ephemeral_storage_socket[1]), | |
28135da3 DDM |
6994 | }; |
6995 | ||
6996 | *ret = TAKE_PTR(rt); | |
6997 | return 1; | |
6998 | } | |
6999 | ||
7000 | ExecRuntime* exec_runtime_free(ExecRuntime *rt) { | |
7001 | if (!rt) | |
7002 | return NULL; | |
7003 | ||
7004 | exec_shared_runtime_unref(rt->shared); | |
15220772 | 7005 | dynamic_creds_unref(rt->dynamic_creds); |
9c0c6701 | 7006 | |
437f3e35 | 7007 | rt->ephemeral_copy = destroy_tree(rt->ephemeral_copy); |
9c0c6701 | 7008 | |
9c0c6701 | 7009 | safe_close_pair(rt->ephemeral_storage_socket); |
28135da3 DDM |
7010 | return mfree(rt); |
7011 | } | |
7012 | ||
7013 | ExecRuntime* exec_runtime_destroy(ExecRuntime *rt) { | |
7014 | if (!rt) | |
7015 | return NULL; | |
7016 | ||
7017 | rt->shared = exec_shared_runtime_destroy(rt->shared); | |
15220772 | 7018 | rt->dynamic_creds = dynamic_creds_destroy(rt->dynamic_creds); |
28135da3 DDM |
7019 | return exec_runtime_free(rt); |
7020 | } | |
7021 | ||
b9c04eaf YW |
7022 | void exec_params_clear(ExecParameters *p) { |
7023 | if (!p) | |
7024 | return; | |
7025 | ||
c3f8a065 LP |
7026 | p->environment = strv_free(p->environment); |
7027 | p->fd_names = strv_free(p->fd_names); | |
7028 | p->fds = mfree(p->fds); | |
7029 | p->exec_fd = safe_close(p->exec_fd); | |
b9c04eaf YW |
7030 | } |
7031 | ||
211a3d87 LB |
7032 | void exec_directory_done(ExecDirectory *d) { |
7033 | if (!d) | |
7034 | return; | |
7035 | ||
7036 | for (size_t i = 0; i < d->n_items; i++) { | |
7037 | free(d->items[i].path); | |
7038 | strv_free(d->items[i].symlinks); | |
7039 | } | |
7040 | ||
7041 | d->items = mfree(d->items); | |
7042 | d->n_items = 0; | |
7043 | d->mode = 0755; | |
7044 | } | |
7045 | ||
564e5c98 YW |
7046 | static ExecDirectoryItem *exec_directory_find(ExecDirectory *d, const char *path) { |
7047 | assert(d); | |
7048 | assert(path); | |
7049 | ||
7050 | for (size_t i = 0; i < d->n_items; i++) | |
7051 | if (path_equal(d->items[i].path, path)) | |
7052 | return &d->items[i]; | |
7053 | ||
7054 | return NULL; | |
7055 | } | |
7056 | ||
7057 | int exec_directory_add(ExecDirectory *d, const char *path, const char *symlink) { | |
211a3d87 LB |
7058 | _cleanup_strv_free_ char **s = NULL; |
7059 | _cleanup_free_ char *p = NULL; | |
564e5c98 YW |
7060 | ExecDirectoryItem *existing; |
7061 | int r; | |
211a3d87 LB |
7062 | |
7063 | assert(d); | |
211a3d87 LB |
7064 | assert(path); |
7065 | ||
564e5c98 YW |
7066 | existing = exec_directory_find(d, path); |
7067 | if (existing) { | |
7068 | r = strv_extend(&existing->symlinks, symlink); | |
7069 | if (r < 0) | |
7070 | return r; | |
7071 | ||
7072 | return 0; /* existing item is updated */ | |
7073 | } | |
7074 | ||
211a3d87 LB |
7075 | p = strdup(path); |
7076 | if (!p) | |
7077 | return -ENOMEM; | |
7078 | ||
564e5c98 YW |
7079 | if (symlink) { |
7080 | s = strv_new(symlink); | |
211a3d87 LB |
7081 | if (!s) |
7082 | return -ENOMEM; | |
7083 | } | |
7084 | ||
564e5c98 | 7085 | if (!GREEDY_REALLOC(d->items, d->n_items + 1)) |
211a3d87 LB |
7086 | return -ENOMEM; |
7087 | ||
564e5c98 | 7088 | d->items[d->n_items++] = (ExecDirectoryItem) { |
211a3d87 LB |
7089 | .path = TAKE_PTR(p), |
7090 | .symlinks = TAKE_PTR(s), | |
7091 | }; | |
7092 | ||
564e5c98 | 7093 | return 1; /* new item is added */ |
211a3d87 LB |
7094 | } |
7095 | ||
a2ab603c YW |
7096 | static int exec_directory_item_compare_func(const ExecDirectoryItem *a, const ExecDirectoryItem *b) { |
7097 | assert(a); | |
7098 | assert(b); | |
7099 | ||
7100 | return path_compare(a->path, b->path); | |
7101 | } | |
7102 | ||
7103 | void exec_directory_sort(ExecDirectory *d) { | |
7104 | assert(d); | |
7105 | ||
7106 | /* Sort the exec directories to make always parent directories processed at first in | |
7107 | * setup_exec_directory(), e.g., even if StateDirectory=foo/bar foo, we need to create foo at first, | |
7108 | * then foo/bar. Also, set .only_create flag if one of the parent directories is contained in the | |
7109 | * list. See also comments in setup_exec_directory() and issue #24783. */ | |
7110 | ||
7111 | if (d->n_items <= 1) | |
7112 | return; | |
7113 | ||
7114 | typesafe_qsort(d->items, d->n_items, exec_directory_item_compare_func); | |
7115 | ||
7116 | for (size_t i = 1; i < d->n_items; i++) | |
7117 | for (size_t j = 0; j < i; j++) | |
7118 | if (path_startswith(d->items[i].path, d->items[j].path)) { | |
7119 | d->items[i].only_create = true; | |
7120 | break; | |
7121 | } | |
211a3d87 LB |
7122 | } |
7123 | ||
4fb8f1e8 LP |
7124 | ExecCleanMask exec_clean_mask_from_string(const char *s) { |
7125 | ExecDirectoryType t; | |
7126 | ||
7127 | assert(s); | |
7128 | ||
7129 | if (streq(s, "all")) | |
7130 | return EXEC_CLEAN_ALL; | |
7131 | if (streq(s, "fdstore")) | |
7132 | return EXEC_CLEAN_FDSTORE; | |
7133 | ||
7134 | t = exec_resource_type_from_string(s); | |
7135 | if (t < 0) | |
7136 | return (ExecCleanMask) t; | |
7137 | ||
7138 | return 1U << t; | |
7139 | } | |
7140 | ||
80876c20 LP |
7141 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
7142 | [EXEC_INPUT_NULL] = "null", | |
7143 | [EXEC_INPUT_TTY] = "tty", | |
7144 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d | 7145 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
52c239d7 LB |
7146 | [EXEC_INPUT_SOCKET] = "socket", |
7147 | [EXEC_INPUT_NAMED_FD] = "fd", | |
08f3be7a | 7148 | [EXEC_INPUT_DATA] = "data", |
2038c3f5 | 7149 | [EXEC_INPUT_FILE] = "file", |
80876c20 LP |
7150 | }; |
7151 | ||
8a0867d6 LP |
7152 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
7153 | ||
94f04347 | 7154 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 7155 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 7156 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 7157 | [EXEC_OUTPUT_TTY] = "tty", |
9a6bca7a | 7158 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 7159 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
7160 | [EXEC_OUTPUT_JOURNAL] = "journal", |
7161 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
52c239d7 LB |
7162 | [EXEC_OUTPUT_SOCKET] = "socket", |
7163 | [EXEC_OUTPUT_NAMED_FD] = "fd", | |
2038c3f5 | 7164 | [EXEC_OUTPUT_FILE] = "file", |
566b7d23 | 7165 | [EXEC_OUTPUT_FILE_APPEND] = "append", |
8d7dab1f | 7166 | [EXEC_OUTPUT_FILE_TRUNCATE] = "truncate", |
94f04347 LP |
7167 | }; |
7168 | ||
7169 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); | |
023a4f67 LP |
7170 | |
7171 | static const char* const exec_utmp_mode_table[_EXEC_UTMP_MODE_MAX] = { | |
7172 | [EXEC_UTMP_INIT] = "init", | |
7173 | [EXEC_UTMP_LOGIN] = "login", | |
7174 | [EXEC_UTMP_USER] = "user", | |
7175 | }; | |
7176 | ||
7177 | DEFINE_STRING_TABLE_LOOKUP(exec_utmp_mode, ExecUtmpMode); | |
53f47dfc YW |
7178 | |
7179 | static const char* const exec_preserve_mode_table[_EXEC_PRESERVE_MODE_MAX] = { | |
7180 | [EXEC_PRESERVE_NO] = "no", | |
7181 | [EXEC_PRESERVE_YES] = "yes", | |
7182 | [EXEC_PRESERVE_RESTART] = "restart", | |
7183 | }; | |
7184 | ||
7185 | DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(exec_preserve_mode, ExecPreserveMode, EXEC_PRESERVE_YES); | |
3536f49e | 7186 | |
6b7b2ed9 | 7187 | /* This table maps ExecDirectoryType to the setting it is configured with in the unit */ |
72fd1768 | 7188 | static const char* const exec_directory_type_table[_EXEC_DIRECTORY_TYPE_MAX] = { |
3536f49e YW |
7189 | [EXEC_DIRECTORY_RUNTIME] = "RuntimeDirectory", |
7190 | [EXEC_DIRECTORY_STATE] = "StateDirectory", | |
7191 | [EXEC_DIRECTORY_CACHE] = "CacheDirectory", | |
7192 | [EXEC_DIRECTORY_LOGS] = "LogsDirectory", | |
7193 | [EXEC_DIRECTORY_CONFIGURATION] = "ConfigurationDirectory", | |
7194 | }; | |
7195 | ||
7196 | DEFINE_STRING_TABLE_LOOKUP(exec_directory_type, ExecDirectoryType); | |
b1edf445 | 7197 | |
211a3d87 LB |
7198 | /* This table maps ExecDirectoryType to the symlink setting it is configured with in the unit */ |
7199 | static const char* const exec_directory_type_symlink_table[_EXEC_DIRECTORY_TYPE_MAX] = { | |
7200 | [EXEC_DIRECTORY_RUNTIME] = "RuntimeDirectorySymlink", | |
7201 | [EXEC_DIRECTORY_STATE] = "StateDirectorySymlink", | |
7202 | [EXEC_DIRECTORY_CACHE] = "CacheDirectorySymlink", | |
7203 | [EXEC_DIRECTORY_LOGS] = "LogsDirectorySymlink", | |
7204 | [EXEC_DIRECTORY_CONFIGURATION] = "ConfigurationDirectorySymlink", | |
7205 | }; | |
7206 | ||
7207 | DEFINE_STRING_TABLE_LOOKUP(exec_directory_type_symlink, ExecDirectoryType); | |
7208 | ||
6b7b2ed9 LP |
7209 | /* And this table maps ExecDirectoryType too, but to a generic term identifying the type of resource. This |
7210 | * one is supposed to be generic enough to be used for unit types that don't use ExecContext and per-unit | |
7211 | * directories, specifically .timer units with their timestamp touch file. */ | |
7212 | static const char* const exec_resource_type_table[_EXEC_DIRECTORY_TYPE_MAX] = { | |
7213 | [EXEC_DIRECTORY_RUNTIME] = "runtime", | |
7214 | [EXEC_DIRECTORY_STATE] = "state", | |
7215 | [EXEC_DIRECTORY_CACHE] = "cache", | |
7216 | [EXEC_DIRECTORY_LOGS] = "logs", | |
7217 | [EXEC_DIRECTORY_CONFIGURATION] = "configuration", | |
7218 | }; | |
7219 | ||
7220 | DEFINE_STRING_TABLE_LOOKUP(exec_resource_type, ExecDirectoryType); | |
7221 | ||
7222 | /* And this table also maps ExecDirectoryType, to the environment variable we pass the selected directory to | |
7223 | * the service payload in. */ | |
fb2042dd YW |
7224 | static const char* const exec_directory_env_name_table[_EXEC_DIRECTORY_TYPE_MAX] = { |
7225 | [EXEC_DIRECTORY_RUNTIME] = "RUNTIME_DIRECTORY", | |
7226 | [EXEC_DIRECTORY_STATE] = "STATE_DIRECTORY", | |
7227 | [EXEC_DIRECTORY_CACHE] = "CACHE_DIRECTORY", | |
7228 | [EXEC_DIRECTORY_LOGS] = "LOGS_DIRECTORY", | |
7229 | [EXEC_DIRECTORY_CONFIGURATION] = "CONFIGURATION_DIRECTORY", | |
7230 | }; | |
7231 | ||
7232 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(exec_directory_env_name, ExecDirectoryType); | |
7233 | ||
b1edf445 LP |
7234 | static const char* const exec_keyring_mode_table[_EXEC_KEYRING_MODE_MAX] = { |
7235 | [EXEC_KEYRING_INHERIT] = "inherit", | |
7236 | [EXEC_KEYRING_PRIVATE] = "private", | |
7237 | [EXEC_KEYRING_SHARED] = "shared", | |
7238 | }; | |
7239 | ||
7240 | DEFINE_STRING_TABLE_LOOKUP(exec_keyring_mode, ExecKeyringMode); |