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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
5cb5a6ff | 22 | #include <assert.h> |
034c6ed7 LP |
23 | #include <dirent.h> |
24 | #include <errno.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
44d8db9e | 27 | #include <string.h> |
309bff19 | 28 | #include <signal.h> |
071830ff LP |
29 | #include <sys/socket.h> |
30 | #include <sys/un.h> | |
94f04347 | 31 | #include <sys/prctl.h> |
66ee3769 | 32 | #include <linux/sched.h> |
451a074f LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
81a2b7ce LP |
35 | #include <grp.h> |
36 | #include <pwd.h> | |
15ae422b | 37 | #include <sys/mount.h> |
25e870b5 | 38 | #include <linux/fs.h> |
dd6c17b1 | 39 | #include <linux/oom.h> |
f2b68789 | 40 | #include <sys/poll.h> |
8351ceae | 41 | #include <linux/seccomp-bpf.h> |
2bef10ab | 42 | #include <glob.h> |
d34cd374 | 43 | #include <libgen.h> |
5cb5a6ff | 44 | |
5b6319dc LP |
45 | #ifdef HAVE_PAM |
46 | #include <security/pam_appl.h> | |
47 | #endif | |
48 | ||
5cb5a6ff LP |
49 | #include "execute.h" |
50 | #include "strv.h" | |
51 | #include "macro.h" | |
d7832d2c | 52 | #include "capability.h" |
5cb5a6ff | 53 | #include "util.h" |
acbb0225 | 54 | #include "log.h" |
20ad4cfd | 55 | #include "sd-messages.h" |
9eba9da4 | 56 | #include "ioprio.h" |
94f04347 | 57 | #include "securebits.h" |
15ae422b | 58 | #include "namespace.h" |
df1f0afe | 59 | #include "tcpwrap.h" |
d06dacd0 | 60 | #include "exit-status.h" |
dd6c17b1 | 61 | #include "missing.h" |
169c1bda | 62 | #include "utmp-wtmp.h" |
f6a6225e | 63 | #include "def.h" |
ff01d048 | 64 | #include "loopback-setup.h" |
9eb977db | 65 | #include "path-util.h" |
8351ceae | 66 | #include "syscall-list.h" |
4d1a6904 | 67 | #include "env-util.h" |
a5c32cff | 68 | #include "fileio.h" |
4ad49000 | 69 | #include "unit.h" |
f485606b | 70 | #include "async.h" |
5cb5a6ff | 71 | |
e056b01d | 72 | #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC) |
31a7eb86 | 73 | #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC) |
e6a26745 | 74 | |
02a51aba LP |
75 | /* This assumes there is a 'tty' group */ |
76 | #define TTY_MODE 0620 | |
77 | ||
034c6ed7 LP |
78 | static int shift_fds(int fds[], unsigned n_fds) { |
79 | int start, restart_from; | |
80 | ||
81 | if (n_fds <= 0) | |
82 | return 0; | |
83 | ||
a0d40ac5 LP |
84 | /* Modifies the fds array! (sorts it) */ |
85 | ||
034c6ed7 LP |
86 | assert(fds); |
87 | ||
88 | start = 0; | |
89 | for (;;) { | |
90 | int i; | |
91 | ||
92 | restart_from = -1; | |
93 | ||
94 | for (i = start; i < (int) n_fds; i++) { | |
95 | int nfd; | |
96 | ||
97 | /* Already at right index? */ | |
98 | if (fds[i] == i+3) | |
99 | continue; | |
100 | ||
101 | if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0) | |
102 | return -errno; | |
103 | ||
e1f5e051 | 104 | close_nointr_nofail(fds[i]); |
034c6ed7 LP |
105 | fds[i] = nfd; |
106 | ||
107 | /* Hmm, the fd we wanted isn't free? Then | |
108 | * let's remember that and try again from here*/ | |
109 | if (nfd != i+3 && restart_from < 0) | |
110 | restart_from = i; | |
111 | } | |
112 | ||
113 | if (restart_from < 0) | |
114 | break; | |
115 | ||
116 | start = restart_from; | |
117 | } | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
c2748801 | 122 | static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) { |
47a71eed | 123 | unsigned i; |
e2c76839 | 124 | int r; |
47a71eed LP |
125 | |
126 | if (n_fds <= 0) | |
127 | return 0; | |
128 | ||
129 | assert(fds); | |
130 | ||
451a074f | 131 | /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */ |
47a71eed LP |
132 | |
133 | for (i = 0; i < n_fds; i++) { | |
47a71eed | 134 | |
e2c76839 LP |
135 | if ((r = fd_nonblock(fds[i], nonblock)) < 0) |
136 | return r; | |
47a71eed | 137 | |
451a074f LP |
138 | /* We unconditionally drop FD_CLOEXEC from the fds, |
139 | * since after all we want to pass these fds to our | |
140 | * children */ | |
47a71eed | 141 | |
e2c76839 LP |
142 | if ((r = fd_cloexec(fds[i], false)) < 0) |
143 | return r; | |
47a71eed LP |
144 | } |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
44a6b1b6 | 149 | _pure_ static const char *tty_path(const ExecContext *context) { |
80876c20 LP |
150 | assert(context); |
151 | ||
152 | if (context->tty_path) | |
153 | return context->tty_path; | |
154 | ||
155 | return "/dev/console"; | |
156 | } | |
157 | ||
6ea832a2 LP |
158 | void exec_context_tty_reset(const ExecContext *context) { |
159 | assert(context); | |
160 | ||
161 | if (context->tty_vhangup) | |
162 | terminal_vhangup(tty_path(context)); | |
163 | ||
164 | if (context->tty_reset) | |
165 | reset_terminal(tty_path(context)); | |
166 | ||
167 | if (context->tty_vt_disallocate && context->tty_path) | |
168 | vt_disallocate(context->tty_path); | |
169 | } | |
170 | ||
3a1286b6 MS |
171 | static bool is_terminal_output(ExecOutput o) { |
172 | return | |
173 | o == EXEC_OUTPUT_TTY || | |
174 | o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || | |
175 | o == EXEC_OUTPUT_KMSG_AND_CONSOLE || | |
176 | o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE; | |
177 | } | |
178 | ||
c17ec25e MS |
179 | void exec_context_serialize(const ExecContext *context, Unit *u, FILE *f) { |
180 | assert(context); | |
181 | assert(u); | |
182 | assert(f); | |
183 | ||
184 | if (context->tmp_dir) | |
185 | unit_serialize_item(u, f, "tmp-dir", context->tmp_dir); | |
186 | ||
187 | if (context->var_tmp_dir) | |
188 | unit_serialize_item(u, f, "var-tmp-dir", context->var_tmp_dir); | |
189 | } | |
190 | ||
80876c20 LP |
191 | static int open_null_as(int flags, int nfd) { |
192 | int fd, r; | |
071830ff | 193 | |
80876c20 | 194 | assert(nfd >= 0); |
071830ff | 195 | |
80876c20 | 196 | if ((fd = open("/dev/null", flags|O_NOCTTY)) < 0) |
071830ff LP |
197 | return -errno; |
198 | ||
80876c20 LP |
199 | if (fd != nfd) { |
200 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
e1f5e051 | 201 | close_nointr_nofail(fd); |
80876c20 LP |
202 | } else |
203 | r = nfd; | |
071830ff | 204 | |
80876c20 | 205 | return r; |
071830ff LP |
206 | } |
207 | ||
62bca2c6 | 208 | static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, const char *unit_id, int nfd) { |
80876c20 | 209 | int fd, r; |
b92bea5d ZJS |
210 | union sockaddr_union sa = { |
211 | .un.sun_family = AF_UNIX, | |
212 | .un.sun_path = "/run/systemd/journal/stdout", | |
213 | }; | |
071830ff LP |
214 | |
215 | assert(context); | |
80876c20 LP |
216 | assert(output < _EXEC_OUTPUT_MAX); |
217 | assert(ident); | |
218 | assert(nfd >= 0); | |
071830ff | 219 | |
54fe0cdb LP |
220 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
221 | if (fd < 0) | |
80876c20 | 222 | return -errno; |
071830ff | 223 | |
54fe0cdb LP |
224 | r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)); |
225 | if (r < 0) { | |
80876c20 LP |
226 | close_nointr_nofail(fd); |
227 | return -errno; | |
228 | } | |
071830ff | 229 | |
80876c20 LP |
230 | if (shutdown(fd, SHUT_RD) < 0) { |
231 | close_nointr_nofail(fd); | |
232 | return -errno; | |
233 | } | |
071830ff | 234 | |
80876c20 | 235 | dprintf(fd, |
62bca2c6 | 236 | "%s\n" |
80876c20 LP |
237 | "%s\n" |
238 | "%i\n" | |
54fe0cdb LP |
239 | "%i\n" |
240 | "%i\n" | |
241 | "%i\n" | |
4f4a1dbf | 242 | "%i\n", |
4f4a1dbf | 243 | context->syslog_identifier ? context->syslog_identifier : ident, |
62bca2c6 | 244 | unit_id, |
54fe0cdb LP |
245 | context->syslog_priority, |
246 | !!context->syslog_level_prefix, | |
247 | output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
248 | output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
3a1286b6 | 249 | is_terminal_output(output)); |
80876c20 LP |
250 | |
251 | if (fd != nfd) { | |
252 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
e1f5e051 | 253 | close_nointr_nofail(fd); |
80876c20 LP |
254 | } else |
255 | r = nfd; | |
071830ff | 256 | |
80876c20 LP |
257 | return r; |
258 | } | |
259 | static int open_terminal_as(const char *path, mode_t mode, int nfd) { | |
260 | int fd, r; | |
071830ff | 261 | |
80876c20 LP |
262 | assert(path); |
263 | assert(nfd >= 0); | |
071830ff | 264 | |
80876c20 LP |
265 | if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0) |
266 | return fd; | |
071830ff | 267 | |
80876c20 LP |
268 | if (fd != nfd) { |
269 | r = dup2(fd, nfd) < 0 ? -errno : nfd; | |
270 | close_nointr_nofail(fd); | |
271 | } else | |
272 | r = nfd; | |
071830ff | 273 | |
80876c20 LP |
274 | return r; |
275 | } | |
071830ff | 276 | |
80876c20 LP |
277 | static bool is_terminal_input(ExecInput i) { |
278 | return | |
279 | i == EXEC_INPUT_TTY || | |
280 | i == EXEC_INPUT_TTY_FORCE || | |
281 | i == EXEC_INPUT_TTY_FAIL; | |
282 | } | |
071830ff | 283 | |
1e3ad081 LP |
284 | static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) { |
285 | ||
286 | if (is_terminal_input(std_input) && !apply_tty_stdin) | |
287 | return EXEC_INPUT_NULL; | |
071830ff | 288 | |
03fd9c49 | 289 | if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
290 | return EXEC_INPUT_NULL; |
291 | ||
03fd9c49 | 292 | return std_input; |
4f2d528d LP |
293 | } |
294 | ||
03fd9c49 | 295 | static int fixup_output(ExecOutput std_output, int socket_fd) { |
4f2d528d | 296 | |
03fd9c49 | 297 | if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0) |
4f2d528d LP |
298 | return EXEC_OUTPUT_INHERIT; |
299 | ||
03fd9c49 | 300 | return std_output; |
4f2d528d LP |
301 | } |
302 | ||
1e3ad081 | 303 | static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) { |
4f2d528d LP |
304 | ExecInput i; |
305 | ||
306 | assert(context); | |
307 | ||
1e3ad081 | 308 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
4f2d528d LP |
309 | |
310 | switch (i) { | |
071830ff | 311 | |
80876c20 LP |
312 | case EXEC_INPUT_NULL: |
313 | return open_null_as(O_RDONLY, STDIN_FILENO); | |
314 | ||
315 | case EXEC_INPUT_TTY: | |
316 | case EXEC_INPUT_TTY_FORCE: | |
317 | case EXEC_INPUT_TTY_FAIL: { | |
318 | int fd, r; | |
071830ff | 319 | |
970edce6 ZJS |
320 | fd = acquire_terminal(tty_path(context), |
321 | i == EXEC_INPUT_TTY_FAIL, | |
322 | i == EXEC_INPUT_TTY_FORCE, | |
323 | false, | |
324 | (usec_t) -1); | |
325 | if (fd < 0) | |
80876c20 LP |
326 | return fd; |
327 | ||
328 | if (fd != STDIN_FILENO) { | |
329 | r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
071830ff | 330 | close_nointr_nofail(fd); |
80876c20 LP |
331 | } else |
332 | r = STDIN_FILENO; | |
333 | ||
334 | return r; | |
335 | } | |
336 | ||
4f2d528d LP |
337 | case EXEC_INPUT_SOCKET: |
338 | return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO; | |
339 | ||
80876c20 LP |
340 | default: |
341 | assert_not_reached("Unknown input type"); | |
342 | } | |
343 | } | |
344 | ||
eb17e935 | 345 | static int setup_output(const ExecContext *context, int fileno, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin) { |
4f2d528d LP |
346 | ExecOutput o; |
347 | ExecInput i; | |
47c1d80d | 348 | int r; |
4f2d528d | 349 | |
80876c20 LP |
350 | assert(context); |
351 | assert(ident); | |
352 | ||
1e3ad081 | 353 | i = fixup_input(context->std_input, socket_fd, apply_tty_stdin); |
03fd9c49 | 354 | o = fixup_output(context->std_output, socket_fd); |
4f2d528d | 355 | |
eb17e935 MS |
356 | if (fileno == STDERR_FILENO) { |
357 | ExecOutput e; | |
358 | e = fixup_output(context->std_error, socket_fd); | |
80876c20 | 359 | |
eb17e935 MS |
360 | /* This expects the input and output are already set up */ |
361 | ||
362 | /* Don't change the stderr file descriptor if we inherit all | |
363 | * the way and are not on a tty */ | |
364 | if (e == EXEC_OUTPUT_INHERIT && | |
365 | o == EXEC_OUTPUT_INHERIT && | |
366 | i == EXEC_INPUT_NULL && | |
367 | !is_terminal_input(context->std_input) && | |
368 | getppid () != 1) | |
369 | return fileno; | |
370 | ||
371 | /* Duplicate from stdout if possible */ | |
372 | if (e == o || e == EXEC_OUTPUT_INHERIT) | |
373 | return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno; | |
071830ff | 374 | |
eb17e935 | 375 | o = e; |
80876c20 | 376 | |
eb17e935 | 377 | } else if (o == EXEC_OUTPUT_INHERIT) { |
21d21ea4 LP |
378 | /* If input got downgraded, inherit the original value */ |
379 | if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input)) | |
eb17e935 | 380 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
21d21ea4 | 381 | |
acb591e4 | 382 | /* If the input is connected to anything that's not a /dev/null, inherit that... */ |
ff876e28 | 383 | if (i != EXEC_INPUT_NULL) |
eb17e935 | 384 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
071830ff | 385 | |
acb591e4 LP |
386 | /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */ |
387 | if (getppid() != 1) | |
eb17e935 | 388 | return fileno; |
94f04347 | 389 | |
eb17e935 MS |
390 | /* We need to open /dev/null here anew, to get the right access mode. */ |
391 | return open_null_as(O_WRONLY, fileno); | |
071830ff | 392 | } |
94f04347 | 393 | |
eb17e935 | 394 | switch (o) { |
80876c20 LP |
395 | |
396 | case EXEC_OUTPUT_NULL: | |
eb17e935 | 397 | return open_null_as(O_WRONLY, fileno); |
80876c20 LP |
398 | |
399 | case EXEC_OUTPUT_TTY: | |
4f2d528d | 400 | if (is_terminal_input(i)) |
eb17e935 | 401 | return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno; |
80876c20 LP |
402 | |
403 | /* We don't reset the terminal if this is just about output */ | |
eb17e935 | 404 | return open_terminal_as(tty_path(context), O_WRONLY, fileno); |
80876c20 LP |
405 | |
406 | case EXEC_OUTPUT_SYSLOG: | |
28dbc1e8 | 407 | case EXEC_OUTPUT_SYSLOG_AND_CONSOLE: |
9a6bca7a | 408 | case EXEC_OUTPUT_KMSG: |
28dbc1e8 | 409 | case EXEC_OUTPUT_KMSG_AND_CONSOLE: |
706343f4 LP |
410 | case EXEC_OUTPUT_JOURNAL: |
411 | case EXEC_OUTPUT_JOURNAL_AND_CONSOLE: | |
eb17e935 | 412 | r = connect_logger_as(context, o, ident, unit_id, fileno); |
47c1d80d | 413 | if (r < 0) { |
80cbda35 MS |
414 | log_struct_unit(LOG_CRIT, unit_id, |
415 | "MESSAGE=Failed to connect std%s of %s to the journal socket: %s", | |
eb17e935 | 416 | fileno == STDOUT_FILENO ? "out" : "err", |
80cbda35 MS |
417 | unit_id, strerror(-r), |
418 | "ERRNO=%d", -r, | |
419 | NULL); | |
eb17e935 | 420 | r = open_null_as(O_WRONLY, fileno); |
47c1d80d MS |
421 | } |
422 | return r; | |
4f2d528d LP |
423 | |
424 | case EXEC_OUTPUT_SOCKET: | |
425 | assert(socket_fd >= 0); | |
eb17e935 | 426 | return dup2(socket_fd, fileno) < 0 ? -errno : fileno; |
94f04347 LP |
427 | |
428 | default: | |
80876c20 | 429 | assert_not_reached("Unknown error type"); |
94f04347 | 430 | } |
071830ff LP |
431 | } |
432 | ||
02a51aba LP |
433 | static int chown_terminal(int fd, uid_t uid) { |
434 | struct stat st; | |
435 | ||
436 | assert(fd >= 0); | |
02a51aba LP |
437 | |
438 | /* This might fail. What matters are the results. */ | |
bab45044 LP |
439 | (void) fchown(fd, uid, -1); |
440 | (void) fchmod(fd, TTY_MODE); | |
02a51aba LP |
441 | |
442 | if (fstat(fd, &st) < 0) | |
443 | return -errno; | |
444 | ||
d8b4e2e9 | 445 | if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE) |
02a51aba LP |
446 | return -EPERM; |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
af6da548 | 451 | static int setup_confirm_stdio(int *_saved_stdin, |
80876c20 LP |
452 | int *_saved_stdout) { |
453 | int fd = -1, saved_stdin, saved_stdout = -1, r; | |
454 | ||
80876c20 LP |
455 | assert(_saved_stdin); |
456 | assert(_saved_stdout); | |
457 | ||
af6da548 LP |
458 | saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3); |
459 | if (saved_stdin < 0) | |
460 | return -errno; | |
80876c20 | 461 | |
af6da548 LP |
462 | saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3); |
463 | if (saved_stdout < 0) { | |
464 | r = errno; | |
80876c20 LP |
465 | goto fail; |
466 | } | |
467 | ||
af6da548 LP |
468 | fd = acquire_terminal( |
469 | "/dev/console", | |
470 | false, | |
471 | false, | |
472 | false, | |
473 | DEFAULT_CONFIRM_USEC); | |
474 | if (fd < 0) { | |
475 | r = fd; | |
80876c20 LP |
476 | goto fail; |
477 | } | |
478 | ||
af6da548 LP |
479 | r = chown_terminal(fd, getuid()); |
480 | if (r < 0) | |
02a51aba | 481 | goto fail; |
02a51aba | 482 | |
80876c20 | 483 | if (dup2(fd, STDIN_FILENO) < 0) { |
af6da548 | 484 | r = -errno; |
80876c20 LP |
485 | goto fail; |
486 | } | |
487 | ||
488 | if (dup2(fd, STDOUT_FILENO) < 0) { | |
af6da548 | 489 | r = -errno; |
80876c20 LP |
490 | goto fail; |
491 | } | |
492 | ||
493 | if (fd >= 2) | |
494 | close_nointr_nofail(fd); | |
495 | ||
496 | *_saved_stdin = saved_stdin; | |
497 | *_saved_stdout = saved_stdout; | |
498 | ||
499 | return 0; | |
500 | ||
501 | fail: | |
502 | if (saved_stdout >= 0) | |
503 | close_nointr_nofail(saved_stdout); | |
504 | ||
505 | if (saved_stdin >= 0) | |
506 | close_nointr_nofail(saved_stdin); | |
507 | ||
508 | if (fd >= 0) | |
509 | close_nointr_nofail(fd); | |
510 | ||
511 | return r; | |
512 | } | |
513 | ||
44b601bc | 514 | _printf_(1, 2) static int write_confirm_message(const char *format, ...) { |
af6da548 LP |
515 | int fd; |
516 | va_list ap; | |
80876c20 | 517 | |
af6da548 | 518 | assert(format); |
80876c20 | 519 | |
af6da548 LP |
520 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
521 | if (fd < 0) | |
522 | return fd; | |
80876c20 | 523 | |
af6da548 LP |
524 | va_start(ap, format); |
525 | vdprintf(fd, format, ap); | |
526 | va_end(ap); | |
80876c20 | 527 | |
af6da548 | 528 | close_nointr_nofail(fd); |
80876c20 | 529 | |
af6da548 LP |
530 | return 0; |
531 | } | |
80876c20 | 532 | |
af6da548 LP |
533 | static int restore_confirm_stdio(int *saved_stdin, |
534 | int *saved_stdout) { | |
80876c20 | 535 | |
af6da548 | 536 | int r = 0; |
80876c20 | 537 | |
af6da548 LP |
538 | assert(saved_stdin); |
539 | assert(saved_stdout); | |
540 | ||
541 | release_terminal(); | |
542 | ||
543 | if (*saved_stdin >= 0) | |
80876c20 | 544 | if (dup2(*saved_stdin, STDIN_FILENO) < 0) |
af6da548 | 545 | r = -errno; |
80876c20 | 546 | |
af6da548 | 547 | if (*saved_stdout >= 0) |
80876c20 | 548 | if (dup2(*saved_stdout, STDOUT_FILENO) < 0) |
af6da548 | 549 | r = -errno; |
80876c20 | 550 | |
af6da548 LP |
551 | if (*saved_stdin >= 0) |
552 | close_nointr_nofail(*saved_stdin); | |
80876c20 | 553 | |
af6da548 LP |
554 | if (*saved_stdout >= 0) |
555 | close_nointr_nofail(*saved_stdout); | |
556 | ||
557 | return r; | |
558 | } | |
559 | ||
560 | static int ask_for_confirmation(char *response, char **argv) { | |
561 | int saved_stdout = -1, saved_stdin = -1, r; | |
562 | char *line; | |
563 | ||
564 | r = setup_confirm_stdio(&saved_stdin, &saved_stdout); | |
565 | if (r < 0) | |
566 | return r; | |
567 | ||
568 | line = exec_command_line(argv); | |
569 | if (!line) | |
570 | return -ENOMEM; | |
571 | ||
572 | r = ask(response, "yns", "Execute %s? [Yes, No, Skip] ", line); | |
573 | free(line); | |
574 | ||
575 | restore_confirm_stdio(&saved_stdin, &saved_stdout); | |
576 | ||
577 | return r; | |
80876c20 LP |
578 | } |
579 | ||
81a2b7ce LP |
580 | static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) { |
581 | bool keep_groups = false; | |
582 | int r; | |
583 | ||
584 | assert(context); | |
585 | ||
35b8ca3a | 586 | /* Lookup and set GID and supplementary group list. Here too |
81a2b7ce LP |
587 | * we avoid NSS lookups for gid=0. */ |
588 | ||
589 | if (context->group || username) { | |
590 | ||
4b67834e LP |
591 | if (context->group) { |
592 | const char *g = context->group; | |
593 | ||
594 | if ((r = get_group_creds(&g, &gid)) < 0) | |
81a2b7ce | 595 | return r; |
4b67834e | 596 | } |
81a2b7ce LP |
597 | |
598 | /* First step, initialize groups from /etc/groups */ | |
599 | if (username && gid != 0) { | |
600 | if (initgroups(username, gid) < 0) | |
601 | return -errno; | |
602 | ||
603 | keep_groups = true; | |
604 | } | |
605 | ||
606 | /* Second step, set our gids */ | |
607 | if (setresgid(gid, gid, gid) < 0) | |
608 | return -errno; | |
609 | } | |
610 | ||
611 | if (context->supplementary_groups) { | |
612 | int ngroups_max, k; | |
613 | gid_t *gids; | |
614 | char **i; | |
615 | ||
616 | /* Final step, initialize any manually set supplementary groups */ | |
da19d5c1 | 617 | assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0); |
81a2b7ce LP |
618 | |
619 | if (!(gids = new(gid_t, ngroups_max))) | |
620 | return -ENOMEM; | |
621 | ||
622 | if (keep_groups) { | |
623 | if ((k = getgroups(ngroups_max, gids)) < 0) { | |
624 | free(gids); | |
625 | return -errno; | |
626 | } | |
627 | } else | |
628 | k = 0; | |
629 | ||
630 | STRV_FOREACH(i, context->supplementary_groups) { | |
4b67834e | 631 | const char *g; |
81a2b7ce LP |
632 | |
633 | if (k >= ngroups_max) { | |
634 | free(gids); | |
635 | return -E2BIG; | |
636 | } | |
637 | ||
4b67834e LP |
638 | g = *i; |
639 | r = get_group_creds(&g, gids+k); | |
640 | if (r < 0) { | |
81a2b7ce LP |
641 | free(gids); |
642 | return r; | |
643 | } | |
644 | ||
645 | k++; | |
646 | } | |
647 | ||
648 | if (setgroups(k, gids) < 0) { | |
649 | free(gids); | |
650 | return -errno; | |
651 | } | |
652 | ||
653 | free(gids); | |
654 | } | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | static int enforce_user(const ExecContext *context, uid_t uid) { | |
660 | int r; | |
661 | assert(context); | |
662 | ||
663 | /* Sets (but doesn't lookup) the uid and make sure we keep the | |
664 | * capabilities while doing so. */ | |
665 | ||
666 | if (context->capabilities) { | |
667 | cap_t d; | |
668 | static const cap_value_t bits[] = { | |
669 | CAP_SETUID, /* Necessary so that we can run setresuid() below */ | |
670 | CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */ | |
671 | }; | |
672 | ||
673 | /* First step: If we need to keep capabilities but | |
674 | * drop privileges we need to make sure we keep our | |
cbb21cca | 675 | * caps, while we drop privileges. */ |
693ced48 | 676 | if (uid != 0) { |
cbb21cca | 677 | int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS; |
693ced48 LP |
678 | |
679 | if (prctl(PR_GET_SECUREBITS) != sb) | |
680 | if (prctl(PR_SET_SECUREBITS, sb) < 0) | |
681 | return -errno; | |
682 | } | |
81a2b7ce | 683 | |
35b8ca3a | 684 | /* Second step: set the capabilities. This will reduce |
81a2b7ce LP |
685 | * the capabilities to the minimum we need. */ |
686 | ||
687 | if (!(d = cap_dup(context->capabilities))) | |
688 | return -errno; | |
689 | ||
690 | if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 || | |
691 | cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) { | |
692 | r = -errno; | |
693 | cap_free(d); | |
694 | return r; | |
695 | } | |
696 | ||
697 | if (cap_set_proc(d) < 0) { | |
698 | r = -errno; | |
699 | cap_free(d); | |
700 | return r; | |
701 | } | |
702 | ||
703 | cap_free(d); | |
704 | } | |
705 | ||
706 | /* Third step: actually set the uids */ | |
707 | if (setresuid(uid, uid, uid) < 0) | |
708 | return -errno; | |
709 | ||
710 | /* At this point we should have all necessary capabilities but | |
711 | are otherwise a normal user. However, the caps might got | |
712 | corrupted due to the setresuid() so we need clean them up | |
713 | later. This is done outside of this call. */ | |
714 | ||
715 | return 0; | |
716 | } | |
717 | ||
5b6319dc LP |
718 | #ifdef HAVE_PAM |
719 | ||
720 | static int null_conv( | |
721 | int num_msg, | |
722 | const struct pam_message **msg, | |
723 | struct pam_response **resp, | |
724 | void *appdata_ptr) { | |
725 | ||
726 | /* We don't support conversations */ | |
727 | ||
728 | return PAM_CONV_ERR; | |
729 | } | |
730 | ||
731 | static int setup_pam( | |
732 | const char *name, | |
733 | const char *user, | |
940c5210 | 734 | uid_t uid, |
5b6319dc LP |
735 | const char *tty, |
736 | char ***pam_env, | |
737 | int fds[], unsigned n_fds) { | |
738 | ||
739 | static const struct pam_conv conv = { | |
740 | .conv = null_conv, | |
741 | .appdata_ptr = NULL | |
742 | }; | |
743 | ||
744 | pam_handle_t *handle = NULL; | |
745 | sigset_t ss, old_ss; | |
746 | int pam_code = PAM_SUCCESS; | |
9ba35398 | 747 | int err; |
5b6319dc LP |
748 | char **e = NULL; |
749 | bool close_session = false; | |
750 | pid_t pam_pid = 0, parent_pid; | |
970edce6 | 751 | int flags = 0; |
5b6319dc LP |
752 | |
753 | assert(name); | |
754 | assert(user); | |
755 | assert(pam_env); | |
756 | ||
757 | /* We set up PAM in the parent process, then fork. The child | |
35b8ca3a | 758 | * will then stay around until killed via PR_GET_PDEATHSIG or |
5b6319dc LP |
759 | * systemd via the cgroup logic. It will then remove the PAM |
760 | * session again. The parent process will exec() the actual | |
761 | * daemon. We do things this way to ensure that the main PID | |
762 | * of the daemon is the one we initially fork()ed. */ | |
763 | ||
970edce6 ZJS |
764 | if (log_get_max_level() < LOG_PRI(LOG_DEBUG)) |
765 | flags |= PAM_SILENT; | |
766 | ||
f546241b ZJS |
767 | pam_code = pam_start(name, user, &conv, &handle); |
768 | if (pam_code != PAM_SUCCESS) { | |
5b6319dc LP |
769 | handle = NULL; |
770 | goto fail; | |
771 | } | |
772 | ||
f546241b ZJS |
773 | if (tty) { |
774 | pam_code = pam_set_item(handle, PAM_TTY, tty); | |
775 | if (pam_code != PAM_SUCCESS) | |
5b6319dc | 776 | goto fail; |
f546241b | 777 | } |
5b6319dc | 778 | |
970edce6 | 779 | pam_code = pam_acct_mgmt(handle, flags); |
f546241b | 780 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
781 | goto fail; |
782 | ||
970edce6 | 783 | pam_code = pam_open_session(handle, flags); |
f546241b | 784 | if (pam_code != PAM_SUCCESS) |
5b6319dc LP |
785 | goto fail; |
786 | ||
787 | close_session = true; | |
788 | ||
f546241b ZJS |
789 | e = pam_getenvlist(handle); |
790 | if (!e) { | |
5b6319dc LP |
791 | pam_code = PAM_BUF_ERR; |
792 | goto fail; | |
793 | } | |
794 | ||
795 | /* Block SIGTERM, so that we know that it won't get lost in | |
796 | * the child */ | |
797 | if (sigemptyset(&ss) < 0 || | |
798 | sigaddset(&ss, SIGTERM) < 0 || | |
799 | sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0) | |
800 | goto fail; | |
801 | ||
802 | parent_pid = getpid(); | |
803 | ||
f546241b ZJS |
804 | pam_pid = fork(); |
805 | if (pam_pid < 0) | |
5b6319dc LP |
806 | goto fail; |
807 | ||
808 | if (pam_pid == 0) { | |
809 | int sig; | |
810 | int r = EXIT_PAM; | |
811 | ||
812 | /* The child's job is to reset the PAM session on | |
813 | * termination */ | |
814 | ||
815 | /* This string must fit in 10 chars (i.e. the length | |
5d6b1584 LP |
816 | * of "/sbin/init"), to look pretty in /bin/ps */ |
817 | rename_process("(sd-pam)"); | |
5b6319dc LP |
818 | |
819 | /* Make sure we don't keep open the passed fds in this | |
820 | child. We assume that otherwise only those fds are | |
821 | open here that have been opened by PAM. */ | |
822 | close_many(fds, n_fds); | |
823 | ||
940c5210 AK |
824 | /* Drop privileges - we don't need any to pam_close_session |
825 | * and this will make PR_SET_PDEATHSIG work in most cases. | |
826 | * If this fails, ignore the error - but expect sd-pam threads | |
827 | * to fail to exit normally */ | |
828 | if (setresuid(uid, uid, uid) < 0) | |
829 | log_error("Error: Failed to setresuid() in sd-pam: %s", strerror(-r)); | |
830 | ||
831 | /* Wait until our parent died. This will only work if | |
832 | * the above setresuid() succeeds, otherwise the kernel | |
833 | * will not allow unprivileged parents kill their privileged | |
834 | * children this way. We rely on the control groups kill logic | |
5b6319dc LP |
835 | * to do the rest for us. */ |
836 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
837 | goto child_finish; | |
838 | ||
839 | /* Check if our parent process might already have | |
840 | * died? */ | |
841 | if (getppid() == parent_pid) { | |
3dead8d9 LP |
842 | for (;;) { |
843 | if (sigwait(&ss, &sig) < 0) { | |
844 | if (errno == EINTR) | |
845 | continue; | |
846 | ||
847 | goto child_finish; | |
848 | } | |
5b6319dc | 849 | |
3dead8d9 LP |
850 | assert(sig == SIGTERM); |
851 | break; | |
852 | } | |
5b6319dc LP |
853 | } |
854 | ||
3dead8d9 | 855 | /* If our parent died we'll end the session */ |
f546241b | 856 | if (getppid() != parent_pid) { |
970edce6 | 857 | pam_code = pam_close_session(handle, flags); |
f546241b | 858 | if (pam_code != PAM_SUCCESS) |
5b6319dc | 859 | goto child_finish; |
f546241b | 860 | } |
5b6319dc LP |
861 | |
862 | r = 0; | |
863 | ||
864 | child_finish: | |
970edce6 | 865 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
866 | _exit(r); |
867 | } | |
868 | ||
869 | /* If the child was forked off successfully it will do all the | |
870 | * cleanups, so forget about the handle here. */ | |
871 | handle = NULL; | |
872 | ||
3b8bddde | 873 | /* Unblock SIGTERM again in the parent */ |
5b6319dc LP |
874 | if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0) |
875 | goto fail; | |
876 | ||
877 | /* We close the log explicitly here, since the PAM modules | |
878 | * might have opened it, but we don't want this fd around. */ | |
879 | closelog(); | |
880 | ||
aa87e624 LP |
881 | *pam_env = e; |
882 | e = NULL; | |
883 | ||
5b6319dc LP |
884 | return 0; |
885 | ||
886 | fail: | |
970edce6 ZJS |
887 | if (pam_code != PAM_SUCCESS) { |
888 | log_error("PAM failed: %s", pam_strerror(handle, pam_code)); | |
9ba35398 | 889 | err = -EPERM; /* PAM errors do not map to errno */ |
970edce6 ZJS |
890 | } else { |
891 | log_error("PAM failed: %m"); | |
9ba35398 | 892 | err = -errno; |
970edce6 | 893 | } |
9ba35398 | 894 | |
5b6319dc LP |
895 | if (handle) { |
896 | if (close_session) | |
970edce6 | 897 | pam_code = pam_close_session(handle, flags); |
5b6319dc | 898 | |
970edce6 | 899 | pam_end(handle, pam_code | flags); |
5b6319dc LP |
900 | } |
901 | ||
902 | strv_free(e); | |
903 | ||
904 | closelog(); | |
905 | ||
430c18ed | 906 | if (pam_pid > 1) { |
5b6319dc | 907 | kill(pam_pid, SIGTERM); |
430c18ed LP |
908 | kill(pam_pid, SIGCONT); |
909 | } | |
5b6319dc | 910 | |
9ba35398 | 911 | return err; |
5b6319dc LP |
912 | } |
913 | #endif | |
914 | ||
5d6b1584 LP |
915 | static void rename_process_from_path(const char *path) { |
916 | char process_name[11]; | |
917 | const char *p; | |
918 | size_t l; | |
919 | ||
920 | /* This resulting string must fit in 10 chars (i.e. the length | |
921 | * of "/sbin/init") to look pretty in /bin/ps */ | |
922 | ||
9eb977db | 923 | p = path_get_file_name(path); |
5d6b1584 LP |
924 | if (isempty(p)) { |
925 | rename_process("(...)"); | |
926 | return; | |
927 | } | |
928 | ||
929 | l = strlen(p); | |
930 | if (l > 8) { | |
931 | /* The end of the process name is usually more | |
932 | * interesting, since the first bit might just be | |
933 | * "systemd-" */ | |
934 | p = p + l - 8; | |
935 | l = 8; | |
936 | } | |
937 | ||
938 | process_name[0] = '('; | |
939 | memcpy(process_name+1, p, l); | |
940 | process_name[1+l] = ')'; | |
941 | process_name[1+l+1] = 0; | |
942 | ||
943 | rename_process(process_name); | |
944 | } | |
945 | ||
8351ceae LP |
946 | static int apply_seccomp(uint32_t *syscall_filter) { |
947 | static const struct sock_filter header[] = { | |
948 | VALIDATE_ARCHITECTURE, | |
949 | EXAMINE_SYSCALL | |
950 | }; | |
951 | static const struct sock_filter footer[] = { | |
952 | _KILL_PROCESS | |
953 | }; | |
954 | ||
955 | int i; | |
956 | unsigned n; | |
957 | struct sock_filter *f; | |
b92bea5d | 958 | struct sock_fprog prog = {}; |
8351ceae LP |
959 | |
960 | assert(syscall_filter); | |
961 | ||
962 | /* First: count the syscalls to check for */ | |
963 | for (i = 0, n = 0; i < syscall_max(); i++) | |
964 | if (syscall_filter[i >> 4] & (1 << (i & 31))) | |
965 | n++; | |
966 | ||
967 | /* Second: build the filter program from a header the syscall | |
968 | * matches and the footer */ | |
969 | f = alloca(sizeof(struct sock_filter) * (ELEMENTSOF(header) + 2*n + ELEMENTSOF(footer))); | |
970 | memcpy(f, header, sizeof(header)); | |
971 | ||
972 | for (i = 0, n = 0; i < syscall_max(); i++) | |
973 | if (syscall_filter[i >> 4] & (1 << (i & 31))) { | |
974 | struct sock_filter item[] = { | |
843fc7f7 | 975 | BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, INDEX_TO_SYSCALL(i), 0, 1), |
8351ceae LP |
976 | BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW) |
977 | }; | |
978 | ||
979 | assert_cc(ELEMENTSOF(item) == 2); | |
980 | ||
981 | f[ELEMENTSOF(header) + 2*n] = item[0]; | |
982 | f[ELEMENTSOF(header) + 2*n+1] = item[1]; | |
983 | ||
984 | n++; | |
985 | } | |
986 | ||
987 | memcpy(f + (ELEMENTSOF(header) + 2*n), footer, sizeof(footer)); | |
988 | ||
989 | /* Third: install the filter */ | |
8351ceae LP |
990 | prog.len = ELEMENTSOF(header) + ELEMENTSOF(footer) + 2*n; |
991 | prog.filter = f; | |
992 | if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog) < 0) | |
993 | return -errno; | |
994 | ||
995 | return 0; | |
996 | } | |
997 | ||
31a7eb86 ZJS |
998 | static void do_idle_pipe_dance(int idle_pipe[4]) { |
999 | assert(idle_pipe); | |
1000 | ||
1001 | if (idle_pipe[1] >= 0) | |
1002 | close_nointr_nofail(idle_pipe[1]); | |
1003 | if (idle_pipe[2] >= 0) | |
1004 | close_nointr_nofail(idle_pipe[2]); | |
1005 | ||
1006 | if (idle_pipe[0] >= 0) { | |
1007 | int r; | |
1008 | ||
1009 | r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC); | |
1010 | ||
1011 | if (idle_pipe[3] >= 0 && r == 0 /* timeout */) { | |
1012 | /* Signal systemd that we are bored and want to continue. */ | |
1013 | write(idle_pipe[3], "x", 1); | |
1014 | ||
1015 | /* Wait for systemd to react to the signal above. */ | |
1016 | fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC); | |
1017 | } | |
1018 | ||
1019 | close_nointr_nofail(idle_pipe[0]); | |
1020 | ||
1021 | } | |
1022 | ||
1023 | if (idle_pipe[3] >= 0) | |
1024 | close_nointr_nofail(idle_pipe[3]); | |
1025 | } | |
1026 | ||
9fb86720 | 1027 | int exec_spawn(ExecCommand *command, |
9e2f7c11 | 1028 | char **argv, |
c17ec25e | 1029 | ExecContext *context, |
c2748801 | 1030 | int fds[], unsigned n_fds, |
1137a57c | 1031 | char **environment, |
81a2b7ce LP |
1032 | bool apply_permissions, |
1033 | bool apply_chroot, | |
1e3ad081 | 1034 | bool apply_tty_stdin, |
80876c20 | 1035 | bool confirm_spawn, |
13b84ec7 | 1036 | CGroupControllerMask cgroup_supported, |
4ad49000 | 1037 | const char *cgroup_path, |
62bca2c6 | 1038 | const char *unit_id, |
31a7eb86 | 1039 | int idle_pipe[4], |
81a2b7ce LP |
1040 | pid_t *ret) { |
1041 | ||
4ad49000 LP |
1042 | _cleanup_strv_free_ char **files_env = NULL; |
1043 | int socket_fd; | |
1044 | char *line; | |
034c6ed7 | 1045 | pid_t pid; |
8e274523 | 1046 | int r; |
034c6ed7 | 1047 | |
5cb5a6ff LP |
1048 | assert(command); |
1049 | assert(context); | |
1050 | assert(ret); | |
034c6ed7 LP |
1051 | assert(fds || n_fds <= 0); |
1052 | ||
4f2d528d LP |
1053 | if (context->std_input == EXEC_INPUT_SOCKET || |
1054 | context->std_output == EXEC_OUTPUT_SOCKET || | |
1055 | context->std_error == EXEC_OUTPUT_SOCKET) { | |
1056 | ||
1057 | if (n_fds != 1) | |
1058 | return -EINVAL; | |
1059 | ||
1060 | socket_fd = fds[0]; | |
1061 | ||
1062 | fds = NULL; | |
1063 | n_fds = 0; | |
1064 | } else | |
1065 | socket_fd = -1; | |
1066 | ||
b66871da ZJS |
1067 | r = exec_context_load_environment(context, &files_env); |
1068 | if (r < 0) { | |
bbc9006e MT |
1069 | log_struct_unit(LOG_ERR, |
1070 | unit_id, | |
23635a85 ZJS |
1071 | "MESSAGE=Failed to load environment files: %s", strerror(-r), |
1072 | "ERRNO=%d", -r, | |
1073 | NULL); | |
8c7be95e LP |
1074 | return r; |
1075 | } | |
1076 | ||
9e2f7c11 LP |
1077 | if (!argv) |
1078 | argv = command->argv; | |
1079 | ||
af6da548 | 1080 | line = exec_command_line(argv); |
b66871da ZJS |
1081 | if (!line) |
1082 | return log_oom(); | |
1a63a750 | 1083 | |
bbc9006e | 1084 | log_struct_unit(LOG_DEBUG, |
099a804b LP |
1085 | unit_id, |
1086 | "EXECUTABLE=%s", command->path, | |
1087 | "MESSAGE=About to execute: %s", line, | |
1088 | NULL); | |
1a63a750 | 1089 | free(line); |
acbb0225 | 1090 | |
c17ec25e MS |
1091 | if (context->private_tmp && !context->tmp_dir && !context->var_tmp_dir) { |
1092 | r = setup_tmpdirs(&context->tmp_dir, &context->var_tmp_dir); | |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | } | |
1096 | ||
b66871da ZJS |
1097 | pid = fork(); |
1098 | if (pid < 0) | |
1099 | return -errno; | |
034c6ed7 LP |
1100 | |
1101 | if (pid == 0) { | |
4c2630eb | 1102 | int i, err; |
309bff19 | 1103 | sigset_t ss; |
59fccd82 | 1104 | const char *username = NULL, *home = NULL, *shell = NULL; |
81a2b7ce LP |
1105 | uid_t uid = (uid_t) -1; |
1106 | gid_t gid = (gid_t) -1; | |
7fd1b19b | 1107 | _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, |
b66871da | 1108 | **final_env = NULL, **final_argv = NULL; |
81a2b7ce | 1109 | unsigned n_env = 0; |
309bff19 | 1110 | |
034c6ed7 | 1111 | /* child */ |
5cb5a6ff | 1112 | |
5d6b1584 | 1113 | rename_process_from_path(command->path); |
5b6319dc | 1114 | |
1b91d3e8 LP |
1115 | /* We reset exactly these signals, since they are the |
1116 | * only ones we set to SIG_IGN in the main daemon. All | |
1117 | * others we leave untouched because we set them to | |
1118 | * SIG_DFL or a valid handler initially, both of which | |
1119 | * will be demoted to SIG_DFL. */ | |
1120 | default_signals(SIGNALS_CRASH_HANDLER, | |
9a34ec5f | 1121 | SIGNALS_IGNORE, -1); |
7b683879 | 1122 | |
353e12c2 LP |
1123 | if (context->ignore_sigpipe) |
1124 | ignore_signals(SIGPIPE, -1); | |
1125 | ||
1126 | assert_se(sigemptyset(&ss) == 0); | |
1127 | if (sigprocmask(SIG_SETMASK, &ss, NULL) < 0) { | |
4c2630eb | 1128 | err = -errno; |
309bff19 | 1129 | r = EXIT_SIGNAL_MASK; |
8c7be95e | 1130 | goto fail_child; |
309bff19 LP |
1131 | } |
1132 | ||
31a7eb86 ZJS |
1133 | if (idle_pipe) |
1134 | do_idle_pipe_dance(idle_pipe); | |
f2b68789 | 1135 | |
85d73053 LP |
1136 | /* Close sockets very early to make sure we don't |
1137 | * block init reexecution because it cannot bind its | |
1138 | * sockets */ | |
4d8a7798 | 1139 | log_forget_fds(); |
4c2630eb MS |
1140 | err = close_all_fds(socket_fd >= 0 ? &socket_fd : fds, |
1141 | socket_fd >= 0 ? 1 : n_fds); | |
1142 | if (err < 0) { | |
fc9b2a84 | 1143 | r = EXIT_FDS; |
8c7be95e | 1144 | goto fail_child; |
fc9b2a84 LP |
1145 | } |
1146 | ||
74922904 | 1147 | if (!context->same_pgrp) |
8d567588 | 1148 | if (setsid() < 0) { |
4c2630eb | 1149 | err = -errno; |
8d567588 | 1150 | r = EXIT_SETSID; |
8c7be95e | 1151 | goto fail_child; |
8d567588 | 1152 | } |
80876c20 | 1153 | |
c5da34ef LP |
1154 | if (context->tcpwrap_name) { |
1155 | if (socket_fd >= 0) | |
1156 | if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) { | |
4c2630eb | 1157 | err = -EACCES; |
c5da34ef | 1158 | r = EXIT_TCPWRAP; |
8c7be95e | 1159 | goto fail_child; |
c5da34ef LP |
1160 | } |
1161 | ||
1162 | for (i = 0; i < (int) n_fds; i++) { | |
1163 | if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) { | |
4c2630eb | 1164 | err = -EACCES; |
c5da34ef | 1165 | r = EXIT_TCPWRAP; |
8c7be95e | 1166 | goto fail_child; |
c5da34ef | 1167 | } |
df1f0afe | 1168 | } |
c5da34ef | 1169 | } |
df1f0afe | 1170 | |
6ea832a2 LP |
1171 | exec_context_tty_reset(context); |
1172 | ||
af6da548 | 1173 | if (confirm_spawn) { |
80876c20 LP |
1174 | char response; |
1175 | ||
af6da548 LP |
1176 | err = ask_for_confirmation(&response, argv); |
1177 | if (err == -ETIMEDOUT) | |
1178 | write_confirm_message("Confirmation question timed out, assuming positive response.\n"); | |
1179 | else if (err < 0) | |
1180 | write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-err)); | |
1181 | else if (response == 's') { | |
1182 | write_confirm_message("Skipping execution.\n"); | |
4c2630eb | 1183 | err = -ECANCELED; |
80876c20 | 1184 | r = EXIT_CONFIRM; |
8c7be95e | 1185 | goto fail_child; |
af6da548 LP |
1186 | } else if (response == 'n') { |
1187 | write_confirm_message("Failing execution.\n"); | |
4c2630eb | 1188 | err = r = 0; |
8c7be95e | 1189 | goto fail_child; |
ee2b4894 | 1190 | } |
034c6ed7 LP |
1191 | } |
1192 | ||
da726a4d LP |
1193 | /* If a socket is connected to STDIN/STDOUT/STDERR, we |
1194 | * must sure to drop O_NONBLOCK */ | |
1195 | if (socket_fd >= 0) | |
1196 | fd_nonblock(socket_fd, false); | |
1197 | ||
af6da548 LP |
1198 | err = setup_input(context, socket_fd, apply_tty_stdin); |
1199 | if (err < 0) { | |
1200 | r = EXIT_STDIN; | |
1201 | goto fail_child; | |
4c2630eb | 1202 | } |
9eba9da4 | 1203 | |
eb17e935 | 1204 | err = setup_output(context, STDOUT_FILENO, socket_fd, path_get_file_name(command->path), unit_id, apply_tty_stdin); |
af6da548 LP |
1205 | if (err < 0) { |
1206 | r = EXIT_STDOUT; | |
1207 | goto fail_child; | |
4c2630eb | 1208 | } |
94f04347 | 1209 | |
eb17e935 | 1210 | err = setup_output(context, STDERR_FILENO, socket_fd, path_get_file_name(command->path), unit_id, apply_tty_stdin); |
4c2630eb | 1211 | if (err < 0) { |
80876c20 | 1212 | r = EXIT_STDERR; |
8c7be95e | 1213 | goto fail_child; |
071830ff LP |
1214 | } |
1215 | ||
4ad49000 | 1216 | if (cgroup_path) { |
13b84ec7 | 1217 | err = cg_attach_everywhere(cgroup_supported, cgroup_path, 0); |
4c2630eb | 1218 | if (err < 0) { |
8e274523 | 1219 | r = EXIT_CGROUP; |
8c7be95e | 1220 | goto fail_child; |
8e274523 | 1221 | } |
4c2630eb | 1222 | } |
8e274523 | 1223 | |
dd6c17b1 | 1224 | if (context->oom_score_adjust_set) { |
fb33a393 | 1225 | char t[16]; |
034c6ed7 | 1226 | |
dd6c17b1 | 1227 | snprintf(t, sizeof(t), "%i", context->oom_score_adjust); |
fb33a393 | 1228 | char_array_0(t); |
034c6ed7 | 1229 | |
574d5f2d | 1230 | if (write_string_file("/proc/self/oom_score_adj", t) < 0) { |
8600c525 KS |
1231 | err = -errno; |
1232 | r = EXIT_OOM_ADJUST; | |
1233 | goto fail_child; | |
fb33a393 | 1234 | } |
034c6ed7 LP |
1235 | } |
1236 | ||
fb33a393 LP |
1237 | if (context->nice_set) |
1238 | if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { | |
4c2630eb | 1239 | err = -errno; |
fb33a393 | 1240 | r = EXIT_NICE; |
8c7be95e | 1241 | goto fail_child; |
fb33a393 LP |
1242 | } |
1243 | ||
94f04347 | 1244 | if (context->cpu_sched_set) { |
b92bea5d ZJS |
1245 | struct sched_param param = { |
1246 | .sched_priority = context->cpu_sched_priority, | |
1247 | }; | |
94f04347 | 1248 | |
e62d8c39 ZJS |
1249 | r = sched_setscheduler(0, |
1250 | context->cpu_sched_policy | | |
1251 | (context->cpu_sched_reset_on_fork ? | |
1252 | SCHED_RESET_ON_FORK : 0), | |
1253 | ¶m); | |
1254 | if (r < 0) { | |
4c2630eb | 1255 | err = -errno; |
94f04347 | 1256 | r = EXIT_SETSCHEDULER; |
8c7be95e | 1257 | goto fail_child; |
94f04347 LP |
1258 | } |
1259 | } | |
1260 | ||
82c121a4 LP |
1261 | if (context->cpuset) |
1262 | if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { | |
4c2630eb | 1263 | err = -errno; |
94f04347 | 1264 | r = EXIT_CPUAFFINITY; |
8c7be95e | 1265 | goto fail_child; |
94f04347 LP |
1266 | } |
1267 | ||
9eba9da4 LP |
1268 | if (context->ioprio_set) |
1269 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { | |
4c2630eb | 1270 | err = -errno; |
9eba9da4 | 1271 | r = EXIT_IOPRIO; |
8c7be95e | 1272 | goto fail_child; |
9eba9da4 LP |
1273 | } |
1274 | ||
d88a251b | 1275 | if (context->timer_slack_nsec != (nsec_t) -1) |
03fae018 | 1276 | if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { |
4c2630eb | 1277 | err = -errno; |
94f04347 | 1278 | r = EXIT_TIMERSLACK; |
8c7be95e | 1279 | goto fail_child; |
94f04347 LP |
1280 | } |
1281 | ||
169c1bda | 1282 | if (context->utmp_id) |
0ad26e09 | 1283 | utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path); |
169c1bda | 1284 | |
81a2b7ce LP |
1285 | if (context->user) { |
1286 | username = context->user; | |
59fccd82 | 1287 | err = get_user_creds(&username, &uid, &gid, &home, &shell); |
4c2630eb | 1288 | if (err < 0) { |
81a2b7ce | 1289 | r = EXIT_USER; |
8c7be95e | 1290 | goto fail_child; |
81a2b7ce | 1291 | } |
d8b4e2e9 | 1292 | |
4c2630eb MS |
1293 | if (is_terminal_input(context->std_input)) { |
1294 | err = chown_terminal(STDIN_FILENO, uid); | |
1295 | if (err < 0) { | |
d8b4e2e9 | 1296 | r = EXIT_STDIN; |
8c7be95e | 1297 | goto fail_child; |
d8b4e2e9 | 1298 | } |
4c2630eb | 1299 | } |
81a2b7ce LP |
1300 | } |
1301 | ||
8aa75193 LP |
1302 | #ifdef HAVE_PAM |
1303 | if (cgroup_path && context->user && context->pam_name) { | |
1304 | err = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, 0644, uid, gid); | |
1305 | if (err < 0) { | |
1306 | r = EXIT_CGROUP; | |
1307 | goto fail_child; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | err = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, 0755, uid, gid); | |
1312 | if (err < 0) { | |
1313 | r = EXIT_CGROUP; | |
1314 | goto fail_child; | |
1315 | } | |
1316 | } | |
1317 | #endif | |
1318 | ||
4c2630eb MS |
1319 | if (apply_permissions) { |
1320 | err = enforce_groups(context, username, gid); | |
1321 | if (err < 0) { | |
3b8bddde LP |
1322 | r = EXIT_GROUP; |
1323 | goto fail_child; | |
1324 | } | |
4c2630eb | 1325 | } |
3b8bddde LP |
1326 | |
1327 | umask(context->umask); | |
1328 | ||
5b6319dc | 1329 | #ifdef HAVE_PAM |
b7848021 | 1330 | if (apply_permissions && context->pam_name && username) { |
940c5210 | 1331 | err = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds); |
4c2630eb | 1332 | if (err < 0) { |
5b6319dc | 1333 | r = EXIT_PAM; |
8c7be95e | 1334 | goto fail_child; |
5b6319dc LP |
1335 | } |
1336 | } | |
1337 | #endif | |
ff01d048 LP |
1338 | if (context->private_network) { |
1339 | if (unshare(CLONE_NEWNET) < 0) { | |
4c2630eb | 1340 | err = -errno; |
ff01d048 LP |
1341 | r = EXIT_NETWORK; |
1342 | goto fail_child; | |
1343 | } | |
1344 | ||
1345 | loopback_setup(); | |
1346 | } | |
5b6319dc | 1347 | |
04aa0cb9 LP |
1348 | if (strv_length(context->read_write_dirs) > 0 || |
1349 | strv_length(context->read_only_dirs) > 0 || | |
1350 | strv_length(context->inaccessible_dirs) > 0 || | |
ac0930c8 | 1351 | context->mount_flags != 0 || |
4c2630eb MS |
1352 | context->private_tmp) { |
1353 | err = setup_namespace(context->read_write_dirs, | |
1354 | context->read_only_dirs, | |
1355 | context->inaccessible_dirs, | |
c17ec25e MS |
1356 | context->tmp_dir, |
1357 | context->var_tmp_dir, | |
4c2630eb MS |
1358 | context->private_tmp, |
1359 | context->mount_flags); | |
1360 | if (err < 0) { | |
1361 | r = EXIT_NAMESPACE; | |
8c7be95e | 1362 | goto fail_child; |
4c2630eb MS |
1363 | } |
1364 | } | |
04aa0cb9 | 1365 | |
81a2b7ce LP |
1366 | if (apply_chroot) { |
1367 | if (context->root_directory) | |
1368 | if (chroot(context->root_directory) < 0) { | |
4c2630eb | 1369 | err = -errno; |
81a2b7ce | 1370 | r = EXIT_CHROOT; |
8c7be95e | 1371 | goto fail_child; |
81a2b7ce LP |
1372 | } |
1373 | ||
1374 | if (chdir(context->working_directory ? context->working_directory : "/") < 0) { | |
4c2630eb | 1375 | err = -errno; |
81a2b7ce | 1376 | r = EXIT_CHDIR; |
8c7be95e | 1377 | goto fail_child; |
81a2b7ce LP |
1378 | } |
1379 | } else { | |
7fd1b19b | 1380 | _cleanup_free_ char *d = NULL; |
81a2b7ce LP |
1381 | |
1382 | if (asprintf(&d, "%s/%s", | |
1383 | context->root_directory ? context->root_directory : "", | |
1384 | context->working_directory ? context->working_directory : "") < 0) { | |
4c2630eb | 1385 | err = -ENOMEM; |
81a2b7ce | 1386 | r = EXIT_MEMORY; |
8c7be95e | 1387 | goto fail_child; |
81a2b7ce LP |
1388 | } |
1389 | ||
1390 | if (chdir(d) < 0) { | |
4c2630eb | 1391 | err = -errno; |
81a2b7ce | 1392 | r = EXIT_CHDIR; |
8c7be95e | 1393 | goto fail_child; |
81a2b7ce | 1394 | } |
81a2b7ce LP |
1395 | } |
1396 | ||
fc9b2a84 LP |
1397 | /* We repeat the fd closing here, to make sure that |
1398 | * nothing is leaked from the PAM modules */ | |
4c2630eb MS |
1399 | err = close_all_fds(fds, n_fds); |
1400 | if (err >= 0) | |
1401 | err = shift_fds(fds, n_fds); | |
1402 | if (err >= 0) | |
1403 | err = flags_fds(fds, n_fds, context->non_blocking); | |
1404 | if (err < 0) { | |
034c6ed7 | 1405 | r = EXIT_FDS; |
8c7be95e | 1406 | goto fail_child; |
034c6ed7 LP |
1407 | } |
1408 | ||
81a2b7ce | 1409 | if (apply_permissions) { |
034c6ed7 | 1410 | |
81a2b7ce LP |
1411 | for (i = 0; i < RLIMIT_NLIMITS; i++) { |
1412 | if (!context->rlimit[i]) | |
1413 | continue; | |
1414 | ||
68faf98c | 1415 | if (setrlimit_closest(i, context->rlimit[i]) < 0) { |
4c2630eb | 1416 | err = -errno; |
81a2b7ce | 1417 | r = EXIT_LIMITS; |
8c7be95e | 1418 | goto fail_child; |
81a2b7ce | 1419 | } |
034c6ed7 | 1420 | } |
034c6ed7 | 1421 | |
4c2630eb | 1422 | if (context->capability_bounding_set_drop) { |
ec8927ca | 1423 | err = capability_bounding_set_drop(context->capability_bounding_set_drop, false); |
4c2630eb | 1424 | if (err < 0) { |
73090dc8 LP |
1425 | r = EXIT_CAPABILITIES; |
1426 | goto fail_child; | |
1427 | } | |
4c2630eb | 1428 | } |
260abb78 | 1429 | |
4c2630eb MS |
1430 | if (context->user) { |
1431 | err = enforce_user(context, uid); | |
1432 | if (err < 0) { | |
81a2b7ce | 1433 | r = EXIT_USER; |
8c7be95e | 1434 | goto fail_child; |
81a2b7ce | 1435 | } |
4c2630eb | 1436 | } |
81a2b7ce | 1437 | |
35b8ca3a | 1438 | /* PR_GET_SECUREBITS is not privileged, while |
693ced48 LP |
1439 | * PR_SET_SECUREBITS is. So to suppress |
1440 | * potential EPERMs we'll try not to call | |
1441 | * PR_SET_SECUREBITS unless necessary. */ | |
1442 | if (prctl(PR_GET_SECUREBITS) != context->secure_bits) | |
1443 | if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) { | |
4c2630eb | 1444 | err = -errno; |
693ced48 | 1445 | r = EXIT_SECUREBITS; |
8c7be95e | 1446 | goto fail_child; |
693ced48 | 1447 | } |
81a2b7ce LP |
1448 | |
1449 | if (context->capabilities) | |
1450 | if (cap_set_proc(context->capabilities) < 0) { | |
4c2630eb | 1451 | err = -errno; |
81a2b7ce | 1452 | r = EXIT_CAPABILITIES; |
8c7be95e | 1453 | goto fail_child; |
81a2b7ce | 1454 | } |
8351ceae LP |
1455 | |
1456 | if (context->no_new_privileges) | |
1457 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) { | |
1458 | err = -errno; | |
1459 | r = EXIT_NO_NEW_PRIVILEGES; | |
1460 | goto fail_child; | |
1461 | } | |
1462 | ||
1463 | if (context->syscall_filter) { | |
1464 | err = apply_seccomp(context->syscall_filter); | |
1465 | if (err < 0) { | |
1466 | r = EXIT_SECCOMP; | |
1467 | goto fail_child; | |
1468 | } | |
1469 | } | |
94f04347 LP |
1470 | } |
1471 | ||
59fccd82 ZJS |
1472 | our_env = new(char*, 8); |
1473 | if (!our_env || | |
1474 | (n_fds > 0 && ( | |
1475 | asprintf(our_env + n_env++, "LISTEN_PID=%lu", (unsigned long) getpid()) < 0 || | |
1476 | asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0)) || | |
1477 | (home && asprintf(our_env + n_env++, "HOME=%s", home) < 0) || | |
1478 | (username && ( | |
1479 | asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 || | |
1480 | asprintf(our_env + n_env++, "USER=%s", username) < 0)) || | |
1481 | (shell && asprintf(our_env + n_env++, "SHELL=%s", shell) < 0) || | |
1482 | ((is_terminal_input(context->std_input) || | |
1483 | context->std_output == EXEC_OUTPUT_TTY || | |
1484 | context->std_error == EXEC_OUTPUT_TTY) && ( | |
1485 | !(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))))) { | |
1486 | ||
4c2630eb | 1487 | err = -ENOMEM; |
81a2b7ce | 1488 | r = EXIT_MEMORY; |
8c7be95e | 1489 | goto fail_child; |
81a2b7ce | 1490 | } |
034c6ed7 | 1491 | |
59fccd82 ZJS |
1492 | our_env[n_env++] = NULL; |
1493 | assert(n_env <= 8); | |
4e85aff4 | 1494 | |
e62d8c39 ZJS |
1495 | final_env = strv_env_merge(5, |
1496 | environment, | |
1497 | our_env, | |
1498 | context->environment, | |
1499 | files_env, | |
1500 | pam_env, | |
1501 | NULL); | |
1502 | if (!final_env) { | |
4c2630eb | 1503 | err = -ENOMEM; |
81a2b7ce | 1504 | r = EXIT_MEMORY; |
8c7be95e | 1505 | goto fail_child; |
81a2b7ce | 1506 | } |
034c6ed7 | 1507 | |
e62d8c39 ZJS |
1508 | final_argv = replace_env_argv(argv, final_env); |
1509 | if (!final_argv) { | |
4c2630eb | 1510 | err = -ENOMEM; |
fab56fc5 | 1511 | r = EXIT_MEMORY; |
8c7be95e | 1512 | goto fail_child; |
fab56fc5 LP |
1513 | } |
1514 | ||
a6ff950e LP |
1515 | final_env = strv_env_clean(final_env); |
1516 | ||
03bb799e HH |
1517 | if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) { |
1518 | line = exec_command_line(final_argv); | |
1519 | if (line) { | |
1520 | log_open(); | |
1521 | log_struct_unit(LOG_DEBUG, | |
1522 | unit_id, | |
1523 | "EXECUTABLE=%s", command->path, | |
099a804b LP |
1524 | "MESSAGE=Executing: %s", line, |
1525 | NULL); | |
03bb799e HH |
1526 | log_close(); |
1527 | free(line); | |
1528 | line = NULL; | |
1529 | } | |
1530 | } | |
fab56fc5 | 1531 | execve(command->path, final_argv, final_env); |
4c2630eb | 1532 | err = -errno; |
034c6ed7 LP |
1533 | r = EXIT_EXEC; |
1534 | ||
8c7be95e | 1535 | fail_child: |
4c2630eb MS |
1536 | if (r != 0) { |
1537 | log_open(); | |
23635a85 ZJS |
1538 | log_struct(LOG_ERR, MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED), |
1539 | "EXECUTABLE=%s", command->path, | |
1540 | "MESSAGE=Failed at step %s spawning %s: %s", | |
1541 | exit_status_to_string(r, EXIT_STATUS_SYSTEMD), | |
1542 | command->path, strerror(-err), | |
1543 | "ERRNO=%d", -err, | |
1544 | NULL); | |
1545 | log_close(); | |
4c2630eb MS |
1546 | } |
1547 | ||
034c6ed7 LP |
1548 | _exit(r); |
1549 | } | |
1550 | ||
bbc9006e | 1551 | log_struct_unit(LOG_DEBUG, |
e62d8c39 ZJS |
1552 | unit_id, |
1553 | "MESSAGE=Forked %s as %lu", | |
1554 | command->path, (unsigned long) pid, | |
1555 | NULL); | |
23635a85 | 1556 | |
80876c20 LP |
1557 | /* We add the new process to the cgroup both in the child (so |
1558 | * that we can be sure that no user code is ever executed | |
1559 | * outside of the cgroup) and in the parent (so that we can be | |
1560 | * sure that when we kill the cgroup the process will be | |
1561 | * killed too). */ | |
4ad49000 LP |
1562 | if (cgroup_path) |
1563 | cg_attach(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, pid); | |
2da3263a | 1564 | |
b58b4116 | 1565 | exec_status_start(&command->exec_status, pid); |
9fb86720 | 1566 | |
034c6ed7 | 1567 | *ret = pid; |
5cb5a6ff LP |
1568 | return 0; |
1569 | } | |
1570 | ||
034c6ed7 LP |
1571 | void exec_context_init(ExecContext *c) { |
1572 | assert(c); | |
1573 | ||
4c12626c | 1574 | c->umask = 0022; |
9eba9da4 | 1575 | c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0); |
94f04347 | 1576 | c->cpu_sched_policy = SCHED_OTHER; |
071830ff | 1577 | c->syslog_priority = LOG_DAEMON|LOG_INFO; |
74922904 | 1578 | c->syslog_level_prefix = true; |
353e12c2 | 1579 | c->ignore_sigpipe = true; |
d88a251b | 1580 | c->timer_slack_nsec = (nsec_t) -1; |
034c6ed7 LP |
1581 | } |
1582 | ||
f485606b ZJS |
1583 | static void *remove_tmpdir_thread(void *p) { |
1584 | int r; | |
1585 | _cleanup_free_ char *dirp = p; | |
1586 | char *dir; | |
1587 | ||
1588 | assert(dirp); | |
1589 | ||
1590 | r = rm_rf_dangerous(dirp, false, true, false); | |
1591 | dir = dirname(dirp); | |
1592 | if (r < 0) | |
1593 | log_warning("Failed to remove content of temporary directory %s: %s", | |
1594 | dir, strerror(-r)); | |
1595 | else { | |
1596 | r = rmdir(dir); | |
1597 | if (r < 0) | |
1598 | log_warning("Failed to remove temporary directory %s: %s", | |
1599 | dir, strerror(-r)); | |
1600 | } | |
1601 | ||
1602 | return NULL; | |
1603 | } | |
1604 | ||
c17ec25e | 1605 | void exec_context_tmp_dirs_done(ExecContext *c) { |
d34cd374 ZJS |
1606 | char* dirs[] = {c->tmp_dir ? c->tmp_dir : c->var_tmp_dir, |
1607 | c->tmp_dir ? c->var_tmp_dir : NULL, | |
1608 | NULL}; | |
1609 | char **dirp; | |
c17ec25e | 1610 | |
d34cd374 | 1611 | for(dirp = dirs; *dirp; dirp++) { |
f485606b ZJS |
1612 | log_debug("Spawning thread to nuke %s", *dirp); |
1613 | asynchronous_job(remove_tmpdir_thread, *dirp); | |
c17ec25e | 1614 | } |
d34cd374 ZJS |
1615 | |
1616 | c->tmp_dir = c->var_tmp_dir = NULL; | |
c17ec25e MS |
1617 | } |
1618 | ||
1619 | void exec_context_done(ExecContext *c, bool reloading_or_reexecuting) { | |
5cb5a6ff LP |
1620 | unsigned l; |
1621 | ||
1622 | assert(c); | |
1623 | ||
1624 | strv_free(c->environment); | |
034c6ed7 | 1625 | c->environment = NULL; |
5cb5a6ff | 1626 | |
8c7be95e LP |
1627 | strv_free(c->environment_files); |
1628 | c->environment_files = NULL; | |
1629 | ||
034c6ed7 | 1630 | for (l = 0; l < ELEMENTSOF(c->rlimit); l++) { |
5cb5a6ff | 1631 | free(c->rlimit[l]); |
034c6ed7 LP |
1632 | c->rlimit[l] = NULL; |
1633 | } | |
1634 | ||
9eba9da4 LP |
1635 | free(c->working_directory); |
1636 | c->working_directory = NULL; | |
1637 | free(c->root_directory); | |
1638 | c->root_directory = NULL; | |
5cb5a6ff | 1639 | |
80876c20 LP |
1640 | free(c->tty_path); |
1641 | c->tty_path = NULL; | |
1642 | ||
df1f0afe LP |
1643 | free(c->tcpwrap_name); |
1644 | c->tcpwrap_name = NULL; | |
1645 | ||
071830ff LP |
1646 | free(c->syslog_identifier); |
1647 | c->syslog_identifier = NULL; | |
1648 | ||
5cb5a6ff | 1649 | free(c->user); |
034c6ed7 LP |
1650 | c->user = NULL; |
1651 | ||
5cb5a6ff | 1652 | free(c->group); |
034c6ed7 LP |
1653 | c->group = NULL; |
1654 | ||
1655 | strv_free(c->supplementary_groups); | |
1656 | c->supplementary_groups = NULL; | |
94f04347 | 1657 | |
5b6319dc LP |
1658 | free(c->pam_name); |
1659 | c->pam_name = NULL; | |
1660 | ||
94f04347 LP |
1661 | if (c->capabilities) { |
1662 | cap_free(c->capabilities); | |
1663 | c->capabilities = NULL; | |
1664 | } | |
15ae422b LP |
1665 | |
1666 | strv_free(c->read_only_dirs); | |
1667 | c->read_only_dirs = NULL; | |
1668 | ||
1669 | strv_free(c->read_write_dirs); | |
1670 | c->read_write_dirs = NULL; | |
1671 | ||
1672 | strv_free(c->inaccessible_dirs); | |
1673 | c->inaccessible_dirs = NULL; | |
82c121a4 LP |
1674 | |
1675 | if (c->cpuset) | |
1676 | CPU_FREE(c->cpuset); | |
86a3475b LP |
1677 | |
1678 | free(c->utmp_id); | |
1679 | c->utmp_id = NULL; | |
b9a0e010 LP |
1680 | |
1681 | free(c->syscall_filter); | |
1682 | c->syscall_filter = NULL; | |
c17ec25e MS |
1683 | |
1684 | if (!reloading_or_reexecuting) | |
1685 | exec_context_tmp_dirs_done(c); | |
5cb5a6ff LP |
1686 | } |
1687 | ||
43d0fcbd LP |
1688 | void exec_command_done(ExecCommand *c) { |
1689 | assert(c); | |
1690 | ||
1691 | free(c->path); | |
1692 | c->path = NULL; | |
1693 | ||
1694 | strv_free(c->argv); | |
1695 | c->argv = NULL; | |
1696 | } | |
1697 | ||
1698 | void exec_command_done_array(ExecCommand *c, unsigned n) { | |
1699 | unsigned i; | |
1700 | ||
1701 | for (i = 0; i < n; i++) | |
1702 | exec_command_done(c+i); | |
1703 | } | |
1704 | ||
5cb5a6ff LP |
1705 | void exec_command_free_list(ExecCommand *c) { |
1706 | ExecCommand *i; | |
1707 | ||
1708 | while ((i = c)) { | |
71fda00f | 1709 | LIST_REMOVE(command, c, i); |
43d0fcbd | 1710 | exec_command_done(i); |
5cb5a6ff LP |
1711 | free(i); |
1712 | } | |
1713 | } | |
1714 | ||
034c6ed7 LP |
1715 | void exec_command_free_array(ExecCommand **c, unsigned n) { |
1716 | unsigned i; | |
1717 | ||
1718 | for (i = 0; i < n; i++) { | |
1719 | exec_command_free_list(c[i]); | |
1720 | c[i] = NULL; | |
1721 | } | |
1722 | } | |
1723 | ||
8c7be95e LP |
1724 | int exec_context_load_environment(const ExecContext *c, char ***l) { |
1725 | char **i, **r = NULL; | |
1726 | ||
1727 | assert(c); | |
1728 | assert(l); | |
1729 | ||
1730 | STRV_FOREACH(i, c->environment_files) { | |
1731 | char *fn; | |
1732 | int k; | |
1733 | bool ignore = false; | |
1734 | char **p; | |
7fd1b19b | 1735 | _cleanup_globfree_ glob_t pglob = {}; |
2bef10ab | 1736 | int count, n; |
8c7be95e LP |
1737 | |
1738 | fn = *i; | |
1739 | ||
1740 | if (fn[0] == '-') { | |
1741 | ignore = true; | |
1742 | fn ++; | |
1743 | } | |
1744 | ||
1745 | if (!path_is_absolute(fn)) { | |
8c7be95e LP |
1746 | if (ignore) |
1747 | continue; | |
1748 | ||
1749 | strv_free(r); | |
1750 | return -EINVAL; | |
1751 | } | |
1752 | ||
2bef10ab | 1753 | /* Filename supports globbing, take all matching files */ |
2bef10ab PL |
1754 | errno = 0; |
1755 | if (glob(fn, 0, NULL, &pglob) != 0) { | |
2bef10ab PL |
1756 | if (ignore) |
1757 | continue; | |
8c7be95e | 1758 | |
2bef10ab PL |
1759 | strv_free(r); |
1760 | return errno ? -errno : -EINVAL; | |
1761 | } | |
1762 | count = pglob.gl_pathc; | |
1763 | if (count == 0) { | |
8c7be95e LP |
1764 | if (ignore) |
1765 | continue; | |
1766 | ||
1767 | strv_free(r); | |
2bef10ab | 1768 | return -EINVAL; |
8c7be95e | 1769 | } |
2bef10ab | 1770 | for (n = 0; n < count; n++) { |
f73141d7 | 1771 | k = load_env_file(pglob.gl_pathv[n], NULL, &p); |
2bef10ab PL |
1772 | if (k < 0) { |
1773 | if (ignore) | |
1774 | continue; | |
8c7be95e | 1775 | |
2bef10ab | 1776 | strv_free(r); |
2bef10ab | 1777 | return k; |
e9c1ea9d | 1778 | } |
ebc05a09 | 1779 | /* Log invalid environment variables with filename */ |
e9c1ea9d JSJ |
1780 | if (p) |
1781 | p = strv_env_clean_log(p, pglob.gl_pathv[n]); | |
8c7be95e | 1782 | |
2bef10ab PL |
1783 | if (r == NULL) |
1784 | r = p; | |
1785 | else { | |
1786 | char **m; | |
8c7be95e | 1787 | |
2bef10ab PL |
1788 | m = strv_env_merge(2, r, p); |
1789 | strv_free(r); | |
1790 | strv_free(p); | |
c84a9488 | 1791 | if (!m) |
2bef10ab | 1792 | return -ENOMEM; |
2bef10ab PL |
1793 | |
1794 | r = m; | |
1795 | } | |
8c7be95e LP |
1796 | } |
1797 | } | |
1798 | ||
1799 | *l = r; | |
1800 | ||
1801 | return 0; | |
1802 | } | |
1803 | ||
6ac8fdc9 MS |
1804 | static bool tty_may_match_dev_console(const char *tty) { |
1805 | char *active = NULL, *console; | |
1806 | bool b; | |
1807 | ||
1808 | if (startswith(tty, "/dev/")) | |
1809 | tty += 5; | |
1810 | ||
1811 | /* trivial identity? */ | |
1812 | if (streq(tty, "console")) | |
1813 | return true; | |
1814 | ||
1815 | console = resolve_dev_console(&active); | |
1816 | /* if we could not resolve, assume it may */ | |
1817 | if (!console) | |
1818 | return true; | |
1819 | ||
1820 | /* "tty0" means the active VC, so it may be the same sometimes */ | |
1821 | b = streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty)); | |
1822 | free(active); | |
1823 | ||
1824 | return b; | |
1825 | } | |
1826 | ||
1827 | bool exec_context_may_touch_console(ExecContext *ec) { | |
1828 | return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate || | |
1829 | is_terminal_input(ec->std_input) || | |
1830 | is_terminal_output(ec->std_output) || | |
1831 | is_terminal_output(ec->std_error)) && | |
1832 | tty_may_match_dev_console(tty_path(ec)); | |
1833 | } | |
1834 | ||
15ae422b LP |
1835 | static void strv_fprintf(FILE *f, char **l) { |
1836 | char **g; | |
1837 | ||
1838 | assert(f); | |
1839 | ||
1840 | STRV_FOREACH(g, l) | |
1841 | fprintf(f, " %s", *g); | |
1842 | } | |
1843 | ||
5cb5a6ff | 1844 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { |
507f22bd | 1845 | char **e; |
94f04347 | 1846 | unsigned i; |
9eba9da4 | 1847 | |
5cb5a6ff LP |
1848 | assert(c); |
1849 | assert(f); | |
1850 | ||
4ad49000 | 1851 | prefix = strempty(prefix); |
5cb5a6ff LP |
1852 | |
1853 | fprintf(f, | |
94f04347 LP |
1854 | "%sUMask: %04o\n" |
1855 | "%sWorkingDirectory: %s\n" | |
451a074f | 1856 | "%sRootDirectory: %s\n" |
15ae422b | 1857 | "%sNonBlocking: %s\n" |
64747e2d | 1858 | "%sPrivateTmp: %s\n" |
4819ff03 LP |
1859 | "%sPrivateNetwork: %s\n" |
1860 | "%sIgnoreSIGPIPE: %s\n", | |
5cb5a6ff | 1861 | prefix, c->umask, |
9eba9da4 | 1862 | prefix, c->working_directory ? c->working_directory : "/", |
451a074f | 1863 | prefix, c->root_directory ? c->root_directory : "/", |
15ae422b | 1864 | prefix, yes_no(c->non_blocking), |
64747e2d | 1865 | prefix, yes_no(c->private_tmp), |
4819ff03 LP |
1866 | prefix, yes_no(c->private_network), |
1867 | prefix, yes_no(c->ignore_sigpipe)); | |
fb33a393 | 1868 | |
8c7be95e LP |
1869 | STRV_FOREACH(e, c->environment) |
1870 | fprintf(f, "%sEnvironment: %s\n", prefix, *e); | |
1871 | ||
1872 | STRV_FOREACH(e, c->environment_files) | |
1873 | fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e); | |
94f04347 | 1874 | |
df1f0afe LP |
1875 | if (c->tcpwrap_name) |
1876 | fprintf(f, | |
1877 | "%sTCPWrapName: %s\n", | |
1878 | prefix, c->tcpwrap_name); | |
1879 | ||
fb33a393 LP |
1880 | if (c->nice_set) |
1881 | fprintf(f, | |
1882 | "%sNice: %i\n", | |
1883 | prefix, c->nice); | |
1884 | ||
dd6c17b1 | 1885 | if (c->oom_score_adjust_set) |
fb33a393 | 1886 | fprintf(f, |
dd6c17b1 LP |
1887 | "%sOOMScoreAdjust: %i\n", |
1888 | prefix, c->oom_score_adjust); | |
9eba9da4 | 1889 | |
94f04347 LP |
1890 | for (i = 0; i < RLIM_NLIMITS; i++) |
1891 | if (c->rlimit[i]) | |
ea430986 | 1892 | fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max); |
94f04347 | 1893 | |
f8b69d1d MS |
1894 | if (c->ioprio_set) { |
1895 | char *class_str; | |
1896 | int r; | |
1897 | ||
1898 | r = ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str); | |
1899 | if (r < 0) | |
1900 | class_str = NULL; | |
9eba9da4 LP |
1901 | fprintf(f, |
1902 | "%sIOSchedulingClass: %s\n" | |
1903 | "%sIOPriority: %i\n", | |
f8b69d1d | 1904 | prefix, strna(class_str), |
9eba9da4 | 1905 | prefix, (int) IOPRIO_PRIO_DATA(c->ioprio)); |
f8b69d1d MS |
1906 | free(class_str); |
1907 | } | |
94f04347 | 1908 | |
f8b69d1d MS |
1909 | if (c->cpu_sched_set) { |
1910 | char *policy_str; | |
1911 | int r; | |
1912 | ||
1913 | r = sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str); | |
1914 | if (r < 0) | |
1915 | policy_str = NULL; | |
94f04347 LP |
1916 | fprintf(f, |
1917 | "%sCPUSchedulingPolicy: %s\n" | |
38b48754 LP |
1918 | "%sCPUSchedulingPriority: %i\n" |
1919 | "%sCPUSchedulingResetOnFork: %s\n", | |
f8b69d1d | 1920 | prefix, strna(policy_str), |
38b48754 LP |
1921 | prefix, c->cpu_sched_priority, |
1922 | prefix, yes_no(c->cpu_sched_reset_on_fork)); | |
f8b69d1d | 1923 | free(policy_str); |
b929bf04 | 1924 | } |
94f04347 | 1925 | |
82c121a4 | 1926 | if (c->cpuset) { |
94f04347 | 1927 | fprintf(f, "%sCPUAffinity:", prefix); |
82c121a4 LP |
1928 | for (i = 0; i < c->cpuset_ncpus; i++) |
1929 | if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset)) | |
94f04347 LP |
1930 | fprintf(f, " %i", i); |
1931 | fputs("\n", f); | |
1932 | } | |
1933 | ||
d88a251b | 1934 | if (c->timer_slack_nsec != (nsec_t) -1) |
f96096db | 1935 | fprintf(f, "%sTimerSlackNSec: %lu\n", prefix, (unsigned long)c->timer_slack_nsec); |
94f04347 LP |
1936 | |
1937 | fprintf(f, | |
80876c20 LP |
1938 | "%sStandardInput: %s\n" |
1939 | "%sStandardOutput: %s\n" | |
1940 | "%sStandardError: %s\n", | |
1941 | prefix, exec_input_to_string(c->std_input), | |
1942 | prefix, exec_output_to_string(c->std_output), | |
1943 | prefix, exec_output_to_string(c->std_error)); | |
1944 | ||
1945 | if (c->tty_path) | |
1946 | fprintf(f, | |
6ea832a2 LP |
1947 | "%sTTYPath: %s\n" |
1948 | "%sTTYReset: %s\n" | |
1949 | "%sTTYVHangup: %s\n" | |
1950 | "%sTTYVTDisallocate: %s\n", | |
1951 | prefix, c->tty_path, | |
1952 | prefix, yes_no(c->tty_reset), | |
1953 | prefix, yes_no(c->tty_vhangup), | |
1954 | prefix, yes_no(c->tty_vt_disallocate)); | |
94f04347 | 1955 | |
706343f4 LP |
1956 | if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG || c->std_output == EXEC_OUTPUT_JOURNAL || |
1957 | c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE || | |
1958 | c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG || c->std_error == EXEC_OUTPUT_JOURNAL || | |
f8b69d1d MS |
1959 | c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) { |
1960 | char *fac_str, *lvl_str; | |
1961 | int r; | |
1962 | ||
1963 | r = log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str); | |
1964 | if (r < 0) | |
1965 | fac_str = NULL; | |
1966 | ||
1967 | r = log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str); | |
1968 | if (r < 0) | |
1969 | lvl_str = NULL; | |
1970 | ||
94f04347 LP |
1971 | fprintf(f, |
1972 | "%sSyslogFacility: %s\n" | |
1973 | "%sSyslogLevel: %s\n", | |
f8b69d1d MS |
1974 | prefix, strna(fac_str), |
1975 | prefix, strna(lvl_str)); | |
1976 | free(lvl_str); | |
1977 | free(fac_str); | |
1978 | } | |
94f04347 LP |
1979 | |
1980 | if (c->capabilities) { | |
1981 | char *t; | |
1982 | if ((t = cap_to_text(c->capabilities, NULL))) { | |
1983 | fprintf(f, "%sCapabilities: %s\n", | |
1984 | prefix, t); | |
1985 | cap_free(t); | |
1986 | } | |
1987 | } | |
1988 | ||
1989 | if (c->secure_bits) | |
1990 | fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n", | |
1991 | prefix, | |
cbb21cca ZJS |
1992 | (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "", |
1993 | (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "", | |
1994 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "", | |
1995 | (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "", | |
1996 | (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "", | |
1997 | (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : ""); | |
94f04347 LP |
1998 | |
1999 | if (c->capability_bounding_set_drop) { | |
ae556c21 | 2000 | unsigned long l; |
260abb78 | 2001 | fprintf(f, "%sCapabilityBoundingSet:", prefix); |
94f04347 | 2002 | |
64685e0c | 2003 | for (l = 0; l <= cap_last_cap(); l++) |
ae556c21 | 2004 | if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) { |
94f04347 LP |
2005 | char *t; |
2006 | ||
ae556c21 | 2007 | if ((t = cap_to_name(l))) { |
94f04347 | 2008 | fprintf(f, " %s", t); |
260abb78 | 2009 | cap_free(t); |
94f04347 LP |
2010 | } |
2011 | } | |
2012 | ||
2013 | fputs("\n", f); | |
2014 | } | |
2015 | ||
2016 | if (c->user) | |
f2d3769a | 2017 | fprintf(f, "%sUser: %s\n", prefix, c->user); |
94f04347 | 2018 | if (c->group) |
f2d3769a | 2019 | fprintf(f, "%sGroup: %s\n", prefix, c->group); |
94f04347 | 2020 | |
15ae422b | 2021 | if (strv_length(c->supplementary_groups) > 0) { |
94f04347 | 2022 | fprintf(f, "%sSupplementaryGroups:", prefix); |
15ae422b LP |
2023 | strv_fprintf(f, c->supplementary_groups); |
2024 | fputs("\n", f); | |
2025 | } | |
94f04347 | 2026 | |
5b6319dc | 2027 | if (c->pam_name) |
f2d3769a | 2028 | fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name); |
5b6319dc | 2029 | |
15ae422b LP |
2030 | if (strv_length(c->read_write_dirs) > 0) { |
2031 | fprintf(f, "%sReadWriteDirs:", prefix); | |
2032 | strv_fprintf(f, c->read_write_dirs); | |
2033 | fputs("\n", f); | |
2034 | } | |
2035 | ||
2036 | if (strv_length(c->read_only_dirs) > 0) { | |
2037 | fprintf(f, "%sReadOnlyDirs:", prefix); | |
2038 | strv_fprintf(f, c->read_only_dirs); | |
2039 | fputs("\n", f); | |
2040 | } | |
94f04347 | 2041 | |
15ae422b LP |
2042 | if (strv_length(c->inaccessible_dirs) > 0) { |
2043 | fprintf(f, "%sInaccessibleDirs:", prefix); | |
2044 | strv_fprintf(f, c->inaccessible_dirs); | |
94f04347 LP |
2045 | fputs("\n", f); |
2046 | } | |
2e22afe9 | 2047 | |
169c1bda LP |
2048 | if (c->utmp_id) |
2049 | fprintf(f, | |
2050 | "%sUtmpIdentifier: %s\n", | |
2051 | prefix, c->utmp_id); | |
5cb5a6ff LP |
2052 | } |
2053 | ||
b58b4116 | 2054 | void exec_status_start(ExecStatus *s, pid_t pid) { |
034c6ed7 | 2055 | assert(s); |
5cb5a6ff | 2056 | |
b58b4116 LP |
2057 | zero(*s); |
2058 | s->pid = pid; | |
2059 | dual_timestamp_get(&s->start_timestamp); | |
2060 | } | |
2061 | ||
6ea832a2 | 2062 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) { |
b58b4116 LP |
2063 | assert(s); |
2064 | ||
0b1f4ae6 | 2065 | if (s->pid && s->pid != pid) |
b58b4116 LP |
2066 | zero(*s); |
2067 | ||
034c6ed7 | 2068 | s->pid = pid; |
63983207 | 2069 | dual_timestamp_get(&s->exit_timestamp); |
9fb86720 | 2070 | |
034c6ed7 LP |
2071 | s->code = code; |
2072 | s->status = status; | |
169c1bda | 2073 | |
6ea832a2 LP |
2074 | if (context) { |
2075 | if (context->utmp_id) | |
2076 | utmp_put_dead_process(context->utmp_id, pid, code, status); | |
2077 | ||
2078 | exec_context_tty_reset(context); | |
2079 | } | |
9fb86720 LP |
2080 | } |
2081 | ||
2082 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) { | |
2083 | char buf[FORMAT_TIMESTAMP_MAX]; | |
2084 | ||
2085 | assert(s); | |
2086 | assert(f); | |
2087 | ||
2088 | if (!prefix) | |
2089 | prefix = ""; | |
2090 | ||
2091 | if (s->pid <= 0) | |
2092 | return; | |
2093 | ||
2094 | fprintf(f, | |
bb00e604 LP |
2095 | "%sPID: %lu\n", |
2096 | prefix, (unsigned long) s->pid); | |
9fb86720 | 2097 | |
63983207 | 2098 | if (s->start_timestamp.realtime > 0) |
9fb86720 LP |
2099 | fprintf(f, |
2100 | "%sStart Timestamp: %s\n", | |
63983207 | 2101 | prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime)); |
9fb86720 | 2102 | |
63983207 | 2103 | if (s->exit_timestamp.realtime > 0) |
9fb86720 LP |
2104 | fprintf(f, |
2105 | "%sExit Timestamp: %s\n" | |
2106 | "%sExit Code: %s\n" | |
2107 | "%sExit Status: %i\n", | |
63983207 | 2108 | prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime), |
9fb86720 LP |
2109 | prefix, sigchld_code_to_string(s->code), |
2110 | prefix, s->status); | |
5cb5a6ff | 2111 | } |
44d8db9e | 2112 | |
9e2f7c11 | 2113 | char *exec_command_line(char **argv) { |
44d8db9e LP |
2114 | size_t k; |
2115 | char *n, *p, **a; | |
2116 | bool first = true; | |
2117 | ||
9e2f7c11 | 2118 | assert(argv); |
44d8db9e | 2119 | |
9164977d | 2120 | k = 1; |
9e2f7c11 | 2121 | STRV_FOREACH(a, argv) |
44d8db9e LP |
2122 | k += strlen(*a)+3; |
2123 | ||
2124 | if (!(n = new(char, k))) | |
2125 | return NULL; | |
2126 | ||
2127 | p = n; | |
9e2f7c11 | 2128 | STRV_FOREACH(a, argv) { |
44d8db9e LP |
2129 | |
2130 | if (!first) | |
2131 | *(p++) = ' '; | |
2132 | else | |
2133 | first = false; | |
2134 | ||
2135 | if (strpbrk(*a, WHITESPACE)) { | |
2136 | *(p++) = '\''; | |
2137 | p = stpcpy(p, *a); | |
2138 | *(p++) = '\''; | |
2139 | } else | |
2140 | p = stpcpy(p, *a); | |
2141 | ||
2142 | } | |
2143 | ||
9164977d LP |
2144 | *p = 0; |
2145 | ||
44d8db9e LP |
2146 | /* FIXME: this doesn't really handle arguments that have |
2147 | * spaces and ticks in them */ | |
2148 | ||
2149 | return n; | |
2150 | } | |
2151 | ||
2152 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) { | |
9fb86720 LP |
2153 | char *p2; |
2154 | const char *prefix2; | |
2155 | ||
44d8db9e LP |
2156 | char *cmd; |
2157 | ||
2158 | assert(c); | |
2159 | assert(f); | |
2160 | ||
2161 | if (!prefix) | |
2162 | prefix = ""; | |
9fb86720 LP |
2163 | p2 = strappend(prefix, "\t"); |
2164 | prefix2 = p2 ? p2 : prefix; | |
44d8db9e | 2165 | |
9e2f7c11 | 2166 | cmd = exec_command_line(c->argv); |
44d8db9e LP |
2167 | |
2168 | fprintf(f, | |
2169 | "%sCommand Line: %s\n", | |
2170 | prefix, cmd ? cmd : strerror(ENOMEM)); | |
2171 | ||
2172 | free(cmd); | |
9fb86720 LP |
2173 | |
2174 | exec_status_dump(&c->exec_status, f, prefix2); | |
2175 | ||
2176 | free(p2); | |
44d8db9e LP |
2177 | } |
2178 | ||
2179 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) { | |
2180 | assert(f); | |
2181 | ||
2182 | if (!prefix) | |
2183 | prefix = ""; | |
2184 | ||
2185 | LIST_FOREACH(command, c, c) | |
2186 | exec_command_dump(c, f, prefix); | |
2187 | } | |
94f04347 | 2188 | |
a6a80b4f LP |
2189 | void exec_command_append_list(ExecCommand **l, ExecCommand *e) { |
2190 | ExecCommand *end; | |
2191 | ||
2192 | assert(l); | |
2193 | assert(e); | |
2194 | ||
2195 | if (*l) { | |
35b8ca3a | 2196 | /* It's kind of important, that we keep the order here */ |
71fda00f LP |
2197 | LIST_FIND_TAIL(command, *l, end); |
2198 | LIST_INSERT_AFTER(command, *l, end, e); | |
a6a80b4f LP |
2199 | } else |
2200 | *l = e; | |
2201 | } | |
2202 | ||
26fd040d LP |
2203 | int exec_command_set(ExecCommand *c, const char *path, ...) { |
2204 | va_list ap; | |
2205 | char **l, *p; | |
2206 | ||
2207 | assert(c); | |
2208 | assert(path); | |
2209 | ||
2210 | va_start(ap, path); | |
2211 | l = strv_new_ap(path, ap); | |
2212 | va_end(ap); | |
2213 | ||
2214 | if (!l) | |
2215 | return -ENOMEM; | |
2216 | ||
2217 | if (!(p = strdup(path))) { | |
2218 | strv_free(l); | |
2219 | return -ENOMEM; | |
2220 | } | |
2221 | ||
2222 | free(c->path); | |
2223 | c->path = p; | |
2224 | ||
2225 | strv_free(c->argv); | |
2226 | c->argv = l; | |
2227 | ||
2228 | return 0; | |
2229 | } | |
2230 | ||
80876c20 LP |
2231 | static const char* const exec_input_table[_EXEC_INPUT_MAX] = { |
2232 | [EXEC_INPUT_NULL] = "null", | |
2233 | [EXEC_INPUT_TTY] = "tty", | |
2234 | [EXEC_INPUT_TTY_FORCE] = "tty-force", | |
4f2d528d LP |
2235 | [EXEC_INPUT_TTY_FAIL] = "tty-fail", |
2236 | [EXEC_INPUT_SOCKET] = "socket" | |
80876c20 LP |
2237 | }; |
2238 | ||
8a0867d6 LP |
2239 | DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput); |
2240 | ||
94f04347 | 2241 | static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = { |
80876c20 | 2242 | [EXEC_OUTPUT_INHERIT] = "inherit", |
94f04347 | 2243 | [EXEC_OUTPUT_NULL] = "null", |
80876c20 | 2244 | [EXEC_OUTPUT_TTY] = "tty", |
94f04347 | 2245 | [EXEC_OUTPUT_SYSLOG] = "syslog", |
28dbc1e8 | 2246 | [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console", |
9a6bca7a | 2247 | [EXEC_OUTPUT_KMSG] = "kmsg", |
28dbc1e8 | 2248 | [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console", |
706343f4 LP |
2249 | [EXEC_OUTPUT_JOURNAL] = "journal", |
2250 | [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console", | |
4f2d528d | 2251 | [EXEC_OUTPUT_SOCKET] = "socket" |
94f04347 LP |
2252 | }; |
2253 | ||
2254 | DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput); |