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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Daniel Lezcano <dlezcano at fr.ibm.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
ff218c25 | 24 | #include "../config.h" |
0ad19a3f | 25 | #include <stdio.h> |
26 | #undef _GNU_SOURCE | |
27 | #include <string.h> | |
28 | #include <stdlib.h> | |
29 | #include <dirent.h> | |
30 | #include <errno.h> | |
31 | #include <unistd.h> | |
32 | #include <signal.h> | |
b0a33c1e | 33 | #include <fcntl.h> |
34 | #include <termios.h> | |
50e98013 | 35 | #include <namespace.h> |
0ad19a3f | 36 | #include <sys/param.h> |
37 | #include <sys/file.h> | |
f4d507d5 | 38 | #include <sys/mount.h> |
b4f8660e | 39 | #include <sys/stat.h> |
0ad19a3f | 40 | #include <sys/types.h> |
0ad19a3f | 41 | #include <sys/prctl.h> |
ddceb1f9 | 42 | #include <sys/types.h> |
42ff343d | 43 | #include <sys/capability.h> |
0ad19a3f | 44 | #include <sys/wait.h> |
b0a33c1e | 45 | #include <sys/un.h> |
46 | #include <sys/poll.h> | |
ff218c25 | 47 | |
48 | #ifdef HAVE_SYS_SIGNALFD_H | |
8ca61733 | 49 | # include <sys/signalfd.h> |
ff218c25 | 50 | #else |
8ca61733 MJ |
51 | # ifndef __NR_signalfd4 |
52 | /* assume kernel headers are too old */ | |
53 | # if __i386__ | |
54 | # define __NR_signalfd4 327 | |
55 | # elif __x86_64__ | |
56 | # define __NR_signalfd4 289 | |
bfa38025 MH |
57 | # elif __powerpc__ |
58 | # define __NR_signalfd4 313 | |
47f38330 SH |
59 | # elif __s390x__ |
60 | # define __NR_signalfd4 322 | |
8ca61733 MJ |
61 | # endif |
62 | #endif | |
63 | ||
64 | # ifndef __NR_signalfd | |
65 | /* assume kernel headers are too old */ | |
66 | # if __i386__ | |
67 | # define __NR_signalfd 321 | |
68 | # elif __x86_64__ | |
69 | # define __NR_signalfd 282 | |
bfa38025 MH |
70 | # elif __powerpc__ |
71 | # define __NR_signalfd 305 | |
47f38330 SH |
72 | # elif __s390x__ |
73 | # define __NR_signalfd 316 | |
8ca61733 MJ |
74 | # endif |
75 | #endif | |
76 | ||
77 | int signalfd(int fd, const sigset_t *mask, int flags) | |
78 | { | |
79 | int retval; | |
80 | ||
81 | retval = syscall (__NR_signalfd4, fd, mask, _NSIG / 8, flags); | |
82 | if (errno == ENOSYS && flags == 0) | |
83 | retval = syscall (__NR_signalfd, fd, mask, _NSIG / 8); | |
84 | return retval; | |
85 | } | |
ff218c25 | 86 | #endif |
0ad19a3f | 87 | |
656994bb MH |
88 | #if !HAVE_DECL_PR_CAPBSET_DROP |
89 | #define PR_CAPBSET_DROP 24 | |
90 | #endif | |
91 | ||
63376d7d DL |
92 | #include "start.h" |
93 | #include "conf.h" | |
6a3111b8 | 94 | #include "cgroup.h" |
63376d7d | 95 | #include "log.h" |
563f2f2c | 96 | #include "cgroup.h" |
e2bcd7db | 97 | #include "error.h" |
b0a33c1e | 98 | #include "af_unix.h" |
99 | #include "mainloop.h" | |
63376d7d | 100 | #include "utils.h" |
563f2f2c | 101 | #include "utmp.h" |
63376d7d | 102 | #include "monitor.h" |
96fa1ff0 | 103 | #include "commands.h" |
63376d7d | 104 | #include "console.h" |
36eb9bde CLG |
105 | |
106 | lxc_log_define(lxc_start, lxc); | |
107 | ||
0ad19a3f | 108 | LXC_TTY_HANDLER(SIGINT); |
109 | LXC_TTY_HANDLER(SIGQUIT); | |
110 | ||
80090207 CLG |
111 | static int match_fd(int fd) |
112 | { | |
113 | return (fd == 0 || fd == 1 || fd == 2); | |
114 | } | |
115 | ||
116 | int lxc_check_inherited(void) | |
117 | { | |
118 | struct dirent dirent, *direntp; | |
119 | int fd, fddir; | |
120 | DIR *dir; | |
121 | int ret = 0; | |
122 | ||
123 | dir = opendir("/proc/self/fd"); | |
124 | if (!dir) { | |
125 | WARN("failed to open directory: %m"); | |
126 | return -1; | |
127 | } | |
128 | ||
129 | fddir = dirfd(dir); | |
130 | ||
131 | while (!readdir_r(dir, &dirent, &direntp)) { | |
132 | char procpath[64]; | |
133 | char path[PATH_MAX]; | |
134 | ||
135 | if (!direntp) | |
136 | break; | |
137 | ||
138 | if (!strcmp(direntp->d_name, ".")) | |
139 | continue; | |
140 | ||
141 | if (!strcmp(direntp->d_name, "..")) | |
142 | continue; | |
143 | ||
144 | fd = atoi(direntp->d_name); | |
145 | ||
146 | if (fd == fddir || fd == lxc_log_fd) | |
147 | continue; | |
148 | ||
149 | if (match_fd(fd)) | |
150 | continue; | |
151 | /* | |
152 | * found inherited fd | |
153 | */ | |
154 | ret = -1; | |
155 | ||
156 | snprintf(procpath, sizeof(procpath), "/proc/self/fd/%d", fd); | |
157 | ||
158 | if (readlink(procpath, path, sizeof(path)) == -1) | |
159 | ERROR("readlink(%s) failed : %m", procpath); | |
160 | else | |
161 | ERROR("inherited fd %d on %s", fd, path); | |
162 | } | |
163 | ||
164 | if (closedir(dir)) | |
165 | ERROR("failed to close directory"); | |
166 | return ret; | |
167 | } | |
168 | ||
b0a33c1e | 169 | static int setup_sigchld_fd(sigset_t *oldmask) |
170 | { | |
171 | sigset_t mask; | |
172 | int fd; | |
173 | ||
174 | if (sigprocmask(SIG_BLOCK, NULL, &mask)) { | |
36eb9bde | 175 | SYSERROR("failed to get mask signal"); |
b0a33c1e | 176 | return -1; |
177 | } | |
178 | ||
179 | if (sigaddset(&mask, SIGCHLD) || sigprocmask(SIG_BLOCK, &mask, oldmask)) { | |
36eb9bde | 180 | SYSERROR("failed to set mask signal"); |
b0a33c1e | 181 | return -1; |
182 | } | |
183 | ||
184 | fd = signalfd(-1, &mask, 0); | |
185 | if (fd < 0) { | |
36eb9bde | 186 | SYSERROR("failed to create the signal fd"); |
b0a33c1e | 187 | return -1; |
188 | } | |
189 | ||
190 | if (fcntl(fd, F_SETFD, FD_CLOEXEC)) { | |
36eb9bde | 191 | SYSERROR("failed to set sigfd to close-on-exec"); |
b0a33c1e | 192 | close(fd); |
193 | return -1; | |
194 | } | |
195 | ||
1ac470c0 DL |
196 | DEBUG("sigchild handler set"); |
197 | ||
b0a33c1e | 198 | return fd; |
199 | } | |
200 | ||
b0a33c1e | 201 | static int sigchld_handler(int fd, void *data, |
202 | struct lxc_epoll_descr *descr) | |
203 | { | |
1ac470c0 DL |
204 | DEBUG("child exited"); |
205 | ||
b0a33c1e | 206 | return 1; |
207 | } | |
208 | ||
0a3ec350 DL |
209 | int lxc_pid_callback(int fd, struct lxc_request *request, |
210 | struct lxc_handler *handler) | |
81c75799 DL |
211 | { |
212 | struct lxc_answer answer; | |
213 | int ret; | |
214 | ||
215 | answer.pid = handler->pid; | |
216 | answer.ret = 0; | |
217 | ||
218 | ret = send(fd, &answer, sizeof(answer), 0); | |
219 | if (ret < 0) { | |
220 | WARN("failed to send answer to the peer"); | |
221 | return -1; | |
222 | } | |
223 | ||
224 | if (ret != sizeof(answer)) { | |
225 | ERROR("partial answer sent"); | |
226 | return -1; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
25c2aca5 | 232 | int lxc_set_state(const char *name, struct lxc_handler *handler, lxc_state_t state) |
66aeffc7 DL |
233 | { |
234 | handler->state = state; | |
235 | lxc_monitor_send_state(name, state); | |
236 | return 0; | |
237 | } | |
238 | ||
1bc5cc8c | 239 | int lxc_poll(const char *name, struct lxc_handler *handler) |
b0a33c1e | 240 | { |
ca5f7926 DL |
241 | int sigfd = handler->sigfd; |
242 | int pid = handler->pid; | |
b0a33c1e | 243 | struct lxc_epoll_descr descr; |
244 | ||
a9e61274 | 245 | if (lxc_mainloop_open(&descr)) { |
36eb9bde | 246 | ERROR("failed to create mainloop"); |
50c8bf05 | 247 | goto out_sigfd; |
b0a33c1e | 248 | } |
249 | ||
250 | if (lxc_mainloop_add_handler(&descr, sigfd, sigchld_handler, &pid)) { | |
36eb9bde | 251 | ERROR("failed to add handler for the signal"); |
b0a33c1e | 252 | goto out_mainloop_open; |
253 | } | |
254 | ||
63376d7d DL |
255 | if (lxc_console_mainloop_add(&descr, handler)) { |
256 | ERROR("failed to add console handler to mainloop"); | |
257 | goto out_mainloop_open; | |
258 | } | |
259 | ||
563f2f2c DL |
260 | if (lxc_command_mainloop_add(name, &descr, handler)) { |
261 | ERROR("failed to add command handler to mainloop"); | |
96fa1ff0 | 262 | goto out_mainloop_open; |
563f2f2c DL |
263 | } |
264 | ||
265 | if (lxc_utmp_mainloop_add(&descr, handler)) { | |
266 | ERROR("failed to add utmp handler to mainloop"); | |
267 | goto out_mainloop_open; | |
268 | } | |
b0a33c1e | 269 | |
c3e13372 | 270 | return lxc_mainloop(&descr); |
b0a33c1e | 271 | |
272 | out_mainloop_open: | |
273 | lxc_mainloop_close(&descr); | |
b0a33c1e | 274 | out_sigfd: |
275 | close(sigfd); | |
c3e13372 | 276 | return -1; |
b0a33c1e | 277 | } |
278 | ||
fae349da | 279 | struct lxc_handler *lxc_init(const char *name, struct lxc_conf *conf) |
59eb99ba | 280 | { |
3a0f472d DL |
281 | struct lxc_handler *handler; |
282 | ||
283 | handler = malloc(sizeof(*handler)); | |
284 | if (!handler) | |
285 | return NULL; | |
59eb99ba DL |
286 | |
287 | memset(handler, 0, sizeof(*handler)); | |
288 | ||
fae349da DL |
289 | handler->conf = conf; |
290 | ||
3bdf52d7 DL |
291 | handler->name = strdup(name); |
292 | if (!handler->name) { | |
293 | ERROR("failed to allocate memory"); | |
294 | goto out_free; | |
295 | } | |
296 | ||
0ad19a3f | 297 | /* Begin the set the state to STARTING*/ |
25c2aca5 | 298 | if (lxc_set_state(name, handler, STARTING)) { |
59eb99ba | 299 | ERROR("failed to set state '%s'", lxc_state2str(STARTING)); |
3bdf52d7 | 300 | goto out_free_name; |
0ad19a3f | 301 | } |
302 | ||
fae349da | 303 | if (lxc_create_tty(name, conf)) { |
36eb9bde | 304 | ERROR("failed to create the ttys"); |
59eb99ba | 305 | goto out_aborting; |
b0a33c1e | 306 | } |
307 | ||
1560f6c9 | 308 | if (lxc_create_console(conf)) { |
63376d7d DL |
309 | ERROR("failed to create console"); |
310 | goto out_delete_tty; | |
311 | } | |
312 | ||
b0a33c1e | 313 | /* the signal fd has to be created before forking otherwise |
314 | * if the child process exits before we setup the signal fd, | |
315 | * the event will be lost and the command will be stuck */ | |
59eb99ba DL |
316 | handler->sigfd = setup_sigchld_fd(&handler->oldmask); |
317 | if (handler->sigfd < 0) { | |
36eb9bde | 318 | ERROR("failed to set sigchild fd handler"); |
63376d7d | 319 | goto out_delete_console; |
b0a33c1e | 320 | } |
321 | ||
59eb99ba DL |
322 | /* Avoid signals from terminal */ |
323 | LXC_TTY_ADD_HANDLER(SIGINT); | |
324 | LXC_TTY_ADD_HANDLER(SIGQUIT); | |
325 | ||
c3e13372 | 326 | INFO("'%s' is initialized", name); |
3a0f472d | 327 | return handler; |
59eb99ba | 328 | |
63376d7d DL |
329 | out_delete_console: |
330 | lxc_delete_console(&conf->console); | |
59eb99ba | 331 | out_delete_tty: |
fae349da | 332 | lxc_delete_tty(&conf->tty_info); |
59eb99ba | 333 | out_aborting: |
25c2aca5 | 334 | lxc_set_state(name, handler, ABORTING); |
3bdf52d7 DL |
335 | out_free_name: |
336 | free(handler->name); | |
337 | handler->name = NULL; | |
3a0f472d DL |
338 | out_free: |
339 | free(handler); | |
c3e13372 | 340 | return NULL; |
59eb99ba DL |
341 | } |
342 | ||
1bc5cc8c | 343 | void lxc_fini(const char *name, struct lxc_handler *handler) |
59eb99ba DL |
344 | { |
345 | /* The STOPPING state is there for future cleanup code | |
346 | * which can take awhile | |
347 | */ | |
25c2aca5 MN |
348 | lxc_set_state(name, handler, STOPPING); |
349 | lxc_set_state(name, handler, STOPPED); | |
59eb99ba DL |
350 | lxc_unlink_nsgroup(name); |
351 | ||
63376d7d | 352 | lxc_delete_console(&handler->conf->console); |
b2431939 | 353 | lxc_delete_tty(&handler->conf->tty_info); |
3bdf52d7 | 354 | free(handler->name); |
b2431939 | 355 | free(handler); |
59eb99ba DL |
356 | |
357 | LXC_TTY_DEL_HANDLER(SIGQUIT); | |
358 | LXC_TTY_DEL_HANDLER(SIGINT); | |
359 | } | |
360 | ||
1bc5cc8c | 361 | void lxc_abort(const char *name, struct lxc_handler *handler) |
59eb99ba | 362 | { |
25c2aca5 | 363 | lxc_set_state(name, handler, ABORTING); |
7d9fb3e9 DL |
364 | if (handler->pid > 0) |
365 | kill(handler->pid, SIGKILL); | |
59eb99ba DL |
366 | } |
367 | ||
50e98013 DL |
368 | struct start_arg { |
369 | const char *name; | |
370 | char *const *argv; | |
371 | struct lxc_handler *handler; | |
372 | int *sv; | |
373 | }; | |
374 | ||
375 | static int do_start(void *arg) | |
376 | { | |
377 | struct start_arg *start_arg = arg; | |
378 | struct lxc_handler *handler = start_arg->handler; | |
379 | const char *name = start_arg->name; | |
380 | char *const *argv = start_arg->argv; | |
381 | int *sv = start_arg->sv; | |
382 | int err = -1, sync; | |
383 | ||
384 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) { | |
385 | SYSERROR("failed to set sigprocmask"); | |
9d7f9e52 | 386 | return -1; |
50e98013 DL |
387 | } |
388 | ||
389 | close(sv[1]); | |
390 | ||
391 | /* Be sure we don't inherit this after the exec */ | |
392 | fcntl(sv[0], F_SETFD, FD_CLOEXEC); | |
393 | ||
394 | /* Tell our father he can begin to configure the container */ | |
395 | if (write(sv[0], &sync, sizeof(sync)) < 0) { | |
396 | SYSERROR("failed to write socket"); | |
9d7f9e52 | 397 | return -1; |
50e98013 DL |
398 | } |
399 | ||
400 | /* Wait for the father to finish the configuration */ | |
401 | if (read(sv[0], &sync, sizeof(sync)) < 0) { | |
402 | SYSERROR("failed to read socket"); | |
9d7f9e52 | 403 | return -1; |
50e98013 DL |
404 | } |
405 | ||
406 | /* Setup the container, ip, names, utsname, ... */ | |
fae349da | 407 | if (lxc_setup(name, handler->conf)) { |
50e98013 DL |
408 | ERROR("failed to setup the container"); |
409 | goto out_warn_father; | |
410 | } | |
411 | ||
412 | if (prctl(PR_CAPBSET_DROP, CAP_SYS_BOOT, 0, 0, 0)) { | |
413 | SYSERROR("failed to remove CAP_SYS_BOOT capability"); | |
9d7f9e52 | 414 | return -1; |
50e98013 DL |
415 | } |
416 | ||
6a6ad7af DL |
417 | if (prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0)) { |
418 | SYSERROR("failed to set pdeath signal"); | |
9d7f9e52 | 419 | return -1; |
6a6ad7af DL |
420 | } |
421 | ||
1ac470c0 DL |
422 | NOTICE("exec'ing '%s'", argv[0]); |
423 | ||
50e98013 DL |
424 | execvp(argv[0], argv); |
425 | SYSERROR("failed to exec %s", argv[0]); | |
426 | ||
427 | out_warn_father: | |
428 | /* If the exec fails, tell that to our father */ | |
429 | if (write(sv[0], &err, sizeof(err)) < 0) | |
430 | SYSERROR("failed to write the socket"); | |
50e98013 DL |
431 | return -1; |
432 | } | |
433 | ||
9618063c | 434 | int lxc_spawn(const char *name, struct lxc_handler *handler, char *const argv[]) |
59eb99ba DL |
435 | { |
436 | int sv[2]; | |
437 | int clone_flags; | |
438 | int err = -1, sync; | |
439 | ||
50e98013 DL |
440 | struct start_arg start_arg = { |
441 | .name = name, | |
442 | .argv = argv, | |
443 | .handler = handler, | |
444 | .sv = sv, | |
445 | }; | |
446 | ||
0ad19a3f | 447 | /* Synchro socketpair */ |
448 | if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sv)) { | |
36eb9bde | 449 | SYSERROR("failed to create communication socketpair"); |
9d7f9e52 | 450 | return -1; |
0ad19a3f | 451 | } |
452 | ||
1ea6db29 | 453 | clone_flags = CLONE_NEWUTS|CLONE_NEWPID|CLONE_NEWIPC|CLONE_NEWNS; |
fae349da | 454 | if (!lxc_list_empty(&handler->conf->network)) { |
82d5ae15 | 455 | |
0ad19a3f | 456 | clone_flags |= CLONE_NEWNET; |
457 | ||
82d5ae15 DL |
458 | /* that should be done before the clone because we will |
459 | * fill the netdev index and use them in the child | |
460 | */ | |
fae349da | 461 | if (lxc_create_network(&handler->conf->network)) { |
82d5ae15 DL |
462 | ERROR("failed to create the network"); |
463 | goto out_close; | |
464 | } | |
465 | } | |
466 | ||
0ad19a3f | 467 | /* Create a process in a new set of namespaces */ |
50e98013 | 468 | handler->pid = lxc_clone(do_start, &start_arg, clone_flags); |
59eb99ba | 469 | if (handler->pid < 0) { |
36eb9bde | 470 | SYSERROR("failed to fork into a new namespace"); |
7fef7a06 | 471 | goto out_delete_net; |
0ad19a3f | 472 | } |
473 | ||
0ad19a3f | 474 | close(sv[0]); |
475 | ||
476 | /* Wait for the child to be ready */ | |
477 | if (read(sv[1], &sync, sizeof(sync)) < 0) { | |
36eb9bde | 478 | SYSERROR("failed to read the socket"); |
7fef7a06 | 479 | goto out_delete_net; |
0ad19a3f | 480 | } |
481 | ||
9f44c578 | 482 | if (lxc_rename_nsgroup(name, handler)) |
7fef7a06 | 483 | goto out_delete_net; |
218d4250 | 484 | |
0ad19a3f | 485 | /* Create the network configuration */ |
82d5ae15 | 486 | if (clone_flags & CLONE_NEWNET) { |
fae349da | 487 | if (lxc_assign_network(&handler->conf->network, handler->pid)) { |
82d5ae15 | 488 | ERROR("failed to create the configured network"); |
7fef7a06 | 489 | goto out_delete_net; |
82d5ae15 | 490 | } |
0ad19a3f | 491 | } |
492 | ||
493 | /* Tell the child to continue its initialization */ | |
494 | if (write(sv[1], &sync, sizeof(sync)) < 0) { | |
36eb9bde | 495 | SYSERROR("failed to write the socket"); |
59eb99ba | 496 | goto out_abort; |
0ad19a3f | 497 | } |
498 | ||
499 | /* Wait for the child to exec or returning an error */ | |
e043236e | 500 | if (read(sv[1], &sync, sizeof(sync)) < 0) { |
36eb9bde | 501 | ERROR("failed to read the socket"); |
59eb99ba | 502 | goto out_abort; |
0ad19a3f | 503 | } |
504 | ||
25c2aca5 | 505 | if (lxc_set_state(name, handler, RUNNING)) { |
59eb99ba DL |
506 | ERROR("failed to set state to %s", |
507 | lxc_state2str(RUNNING)); | |
508 | goto out_abort; | |
3f21c114 | 509 | } |
22ebac19 | 510 | |
59eb99ba | 511 | err = 0; |
22ebac19 | 512 | |
1ac470c0 DL |
513 | NOTICE("'%s' started with pid '%d'", argv[0], handler->pid); |
514 | ||
59eb99ba DL |
515 | out_close: |
516 | close(sv[0]); | |
517 | close(sv[1]); | |
59eb99ba | 518 | return err; |
0ad19a3f | 519 | |
7fef7a06 DL |
520 | out_delete_net: |
521 | if (clone_flags & CLONE_NEWNET) | |
522 | lxc_delete_network(&handler->conf->network); | |
59eb99ba DL |
523 | out_abort: |
524 | lxc_abort(name, handler); | |
b79fcd86 GK |
525 | close(sv[1]); |
526 | return -1; | |
59eb99ba | 527 | } |
0ad19a3f | 528 | |
fae349da | 529 | int lxc_start(const char *name, char *const argv[], struct lxc_conf *conf) |
59eb99ba | 530 | { |
3a0f472d | 531 | struct lxc_handler *handler; |
e043236e | 532 | int err = -1; |
59eb99ba DL |
533 | int status; |
534 | ||
80090207 CLG |
535 | if (lxc_check_inherited()) |
536 | return -1; | |
537 | ||
fae349da | 538 | handler = lxc_init(name, conf); |
3a0f472d | 539 | if (!handler) { |
59eb99ba | 540 | ERROR("failed to initialize the container"); |
66aeffc7 | 541 | return -1; |
0ad19a3f | 542 | } |
543 | ||
3a0f472d | 544 | err = lxc_spawn(name, handler, argv); |
59eb99ba DL |
545 | if (err) { |
546 | ERROR("failed to spawn '%s'", argv[0]); | |
9d7f9e52 | 547 | goto out_fini; |
0ad19a3f | 548 | } |
549 | ||
affaa6da MN |
550 | /* no need of other inherited fds but stderr */ |
551 | close(fileno(stdin)); | |
552 | close(fileno(stdout)); | |
553 | ||
3a0f472d | 554 | err = lxc_poll(name, handler); |
e043236e | 555 | if (err) { |
59eb99ba DL |
556 | ERROR("mainloop exited with an error"); |
557 | goto out_abort; | |
558 | } | |
0ad19a3f | 559 | |
3a0f472d | 560 | while (waitpid(handler->pid, &status, 0) < 0 && errno == EINTR) |
1bc5cc8c | 561 | continue; |
e043236e | 562 | |
91480a0f DL |
563 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) |
564 | WARN("failed to restore sigprocmask"); | |
565 | ||
3a0f472d | 566 | err = lxc_error_set_and_log(handler->pid, status); |
9d7f9e52 | 567 | out_fini: |
3a0f472d | 568 | lxc_fini(name, handler); |
0ad19a3f | 569 | return err; |
570 | ||
59eb99ba | 571 | out_abort: |
3a0f472d | 572 | lxc_abort(name, handler); |
9d7f9e52 | 573 | goto out_fini; |
0ad19a3f | 574 | } |