]>
Commit | Line | Data |
---|---|---|
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 | |
15cd25fd | 48 | #ifdef HAVE_SYS_SIGNALFD_H |
8ca61733 | 49 | # include <sys/signalfd.h> |
ff218c25 | 50 | #else |
15cd25fd DL |
51 | /* assume kernel headers are too old */ |
52 | struct signalfd_siginfo | |
53 | { | |
da2aef7f DL |
54 | uint32_t ssi_signo; |
55 | int32_t ssi_errno; | |
56 | int32_t ssi_code; | |
57 | uint32_t ssi_pid; | |
58 | uint32_t ssi_uid; | |
59 | int32_t ssi_fd; | |
60 | uint32_t ssi_tid; | |
61 | uint32_t ssi_band; | |
62 | uint32_t ssi_overrun; | |
63 | uint32_t ssi_trapno; | |
64 | int32_t ssi_status; | |
65 | int32_t ssi_int; | |
66 | uint64_t ssi_ptr; | |
67 | uint64_t ssi_utime; | |
68 | uint64_t ssi_stime; | |
69 | uint64_t ssi_addr; | |
70 | uint8_t __pad[48]; | |
15cd25fd DL |
71 | }; |
72 | ||
8ca61733 MJ |
73 | # ifndef __NR_signalfd4 |
74 | /* assume kernel headers are too old */ | |
75 | # if __i386__ | |
76 | # define __NR_signalfd4 327 | |
77 | # elif __x86_64__ | |
78 | # define __NR_signalfd4 289 | |
bfa38025 MH |
79 | # elif __powerpc__ |
80 | # define __NR_signalfd4 313 | |
47f38330 SH |
81 | # elif __s390x__ |
82 | # define __NR_signalfd4 322 | |
8ca61733 MJ |
83 | # endif |
84 | #endif | |
85 | ||
86 | # ifndef __NR_signalfd | |
87 | /* assume kernel headers are too old */ | |
88 | # if __i386__ | |
89 | # define __NR_signalfd 321 | |
90 | # elif __x86_64__ | |
91 | # define __NR_signalfd 282 | |
bfa38025 MH |
92 | # elif __powerpc__ |
93 | # define __NR_signalfd 305 | |
47f38330 SH |
94 | # elif __s390x__ |
95 | # define __NR_signalfd 316 | |
8ca61733 MJ |
96 | # endif |
97 | #endif | |
98 | ||
99 | int signalfd(int fd, const sigset_t *mask, int flags) | |
100 | { | |
101 | int retval; | |
102 | ||
103 | retval = syscall (__NR_signalfd4, fd, mask, _NSIG / 8, flags); | |
104 | if (errno == ENOSYS && flags == 0) | |
105 | retval = syscall (__NR_signalfd, fd, mask, _NSIG / 8); | |
106 | return retval; | |
107 | } | |
ff218c25 | 108 | #endif |
0ad19a3f | 109 | |
656994bb MH |
110 | #if !HAVE_DECL_PR_CAPBSET_DROP |
111 | #define PR_CAPBSET_DROP 24 | |
112 | #endif | |
113 | ||
63376d7d DL |
114 | #include "start.h" |
115 | #include "conf.h" | |
6a3111b8 | 116 | #include "cgroup.h" |
63376d7d | 117 | #include "log.h" |
563f2f2c | 118 | #include "cgroup.h" |
e2bcd7db | 119 | #include "error.h" |
b0a33c1e | 120 | #include "af_unix.h" |
121 | #include "mainloop.h" | |
63376d7d | 122 | #include "utils.h" |
563f2f2c | 123 | #include "utmp.h" |
63376d7d | 124 | #include "monitor.h" |
96fa1ff0 | 125 | #include "commands.h" |
63376d7d | 126 | #include "console.h" |
3c22086f | 127 | #include "sync.h" |
36eb9bde CLG |
128 | |
129 | lxc_log_define(lxc_start, lxc); | |
130 | ||
0ad19a3f | 131 | LXC_TTY_HANDLER(SIGINT); |
132 | LXC_TTY_HANDLER(SIGQUIT); | |
133 | ||
80090207 CLG |
134 | static int match_fd(int fd) |
135 | { | |
136 | return (fd == 0 || fd == 1 || fd == 2); | |
137 | } | |
138 | ||
f2faa8fa | 139 | int lxc_check_inherited(int fd_to_ignore) |
80090207 CLG |
140 | { |
141 | struct dirent dirent, *direntp; | |
142 | int fd, fddir; | |
143 | DIR *dir; | |
144 | int ret = 0; | |
145 | ||
146 | dir = opendir("/proc/self/fd"); | |
147 | if (!dir) { | |
148 | WARN("failed to open directory: %m"); | |
149 | return -1; | |
150 | } | |
151 | ||
152 | fddir = dirfd(dir); | |
153 | ||
154 | while (!readdir_r(dir, &dirent, &direntp)) { | |
155 | char procpath[64]; | |
156 | char path[PATH_MAX]; | |
157 | ||
158 | if (!direntp) | |
159 | break; | |
160 | ||
161 | if (!strcmp(direntp->d_name, ".")) | |
162 | continue; | |
163 | ||
164 | if (!strcmp(direntp->d_name, "..")) | |
165 | continue; | |
166 | ||
167 | fd = atoi(direntp->d_name); | |
168 | ||
f2faa8fa | 169 | if (fd == fddir || fd == lxc_log_fd || fd == fd_to_ignore) |
80090207 CLG |
170 | continue; |
171 | ||
172 | if (match_fd(fd)) | |
173 | continue; | |
174 | /* | |
175 | * found inherited fd | |
176 | */ | |
177 | ret = -1; | |
178 | ||
179 | snprintf(procpath, sizeof(procpath), "/proc/self/fd/%d", fd); | |
180 | ||
181 | if (readlink(procpath, path, sizeof(path)) == -1) | |
182 | ERROR("readlink(%s) failed : %m", procpath); | |
183 | else | |
184 | ERROR("inherited fd %d on %s", fd, path); | |
185 | } | |
186 | ||
187 | if (closedir(dir)) | |
188 | ERROR("failed to close directory"); | |
189 | return ret; | |
190 | } | |
191 | ||
b0a33c1e | 192 | static int setup_sigchld_fd(sigset_t *oldmask) |
193 | { | |
194 | sigset_t mask; | |
195 | int fd; | |
196 | ||
197 | if (sigprocmask(SIG_BLOCK, NULL, &mask)) { | |
36eb9bde | 198 | SYSERROR("failed to get mask signal"); |
b0a33c1e | 199 | return -1; |
200 | } | |
201 | ||
202 | if (sigaddset(&mask, SIGCHLD) || sigprocmask(SIG_BLOCK, &mask, oldmask)) { | |
36eb9bde | 203 | SYSERROR("failed to set mask signal"); |
b0a33c1e | 204 | return -1; |
205 | } | |
206 | ||
207 | fd = signalfd(-1, &mask, 0); | |
208 | if (fd < 0) { | |
36eb9bde | 209 | SYSERROR("failed to create the signal fd"); |
b0a33c1e | 210 | return -1; |
211 | } | |
212 | ||
213 | if (fcntl(fd, F_SETFD, FD_CLOEXEC)) { | |
36eb9bde | 214 | SYSERROR("failed to set sigfd to close-on-exec"); |
b0a33c1e | 215 | close(fd); |
216 | return -1; | |
217 | } | |
218 | ||
1ac470c0 DL |
219 | DEBUG("sigchild handler set"); |
220 | ||
b0a33c1e | 221 | return fd; |
222 | } | |
223 | ||
15cd25fd | 224 | static int sigchld_handler(int fd, void *data, |
b0a33c1e | 225 | struct lxc_epoll_descr *descr) |
226 | { | |
15cd25fd DL |
227 | struct signalfd_siginfo siginfo; |
228 | int ret; | |
82d89dce | 229 | pid_t *pid = data; |
15cd25fd DL |
230 | |
231 | ret = read(fd, &siginfo, sizeof(siginfo)); | |
232 | if (ret < 0) { | |
233 | ERROR("failed to read sigchld info"); | |
234 | return -1; | |
235 | } | |
236 | ||
237 | if (ret != sizeof(siginfo)) { | |
238 | ERROR("unexpected siginfo size"); | |
239 | return -1; | |
240 | } | |
241 | ||
242 | if (siginfo.ssi_code == CLD_STOPPED || | |
243 | siginfo.ssi_code == CLD_CONTINUED) { | |
244 | INFO("container init process was stopped/continued"); | |
245 | return 0; | |
246 | } | |
1ac470c0 | 247 | |
82d89dce DL |
248 | /* more robustness, protect ourself from a SIGCHLD sent |
249 | * by a process different from the container init | |
250 | */ | |
251 | if (siginfo.ssi_pid != *pid) { | |
252 | WARN("invalid pid for SIGCHLD"); | |
253 | return 0; | |
254 | } | |
255 | ||
15cd25fd | 256 | DEBUG("container init process exited"); |
b0a33c1e | 257 | return 1; |
258 | } | |
259 | ||
0a3ec350 DL |
260 | int lxc_pid_callback(int fd, struct lxc_request *request, |
261 | struct lxc_handler *handler) | |
81c75799 DL |
262 | { |
263 | struct lxc_answer answer; | |
264 | int ret; | |
265 | ||
266 | answer.pid = handler->pid; | |
267 | answer.ret = 0; | |
268 | ||
269 | ret = send(fd, &answer, sizeof(answer), 0); | |
270 | if (ret < 0) { | |
271 | WARN("failed to send answer to the peer"); | |
272 | return -1; | |
273 | } | |
274 | ||
275 | if (ret != sizeof(answer)) { | |
276 | ERROR("partial answer sent"); | |
277 | return -1; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
25c2aca5 | 283 | int lxc_set_state(const char *name, struct lxc_handler *handler, lxc_state_t state) |
66aeffc7 DL |
284 | { |
285 | handler->state = state; | |
286 | lxc_monitor_send_state(name, state); | |
287 | return 0; | |
288 | } | |
289 | ||
1bc5cc8c | 290 | int lxc_poll(const char *name, struct lxc_handler *handler) |
b0a33c1e | 291 | { |
ca5f7926 DL |
292 | int sigfd = handler->sigfd; |
293 | int pid = handler->pid; | |
b0a33c1e | 294 | struct lxc_epoll_descr descr; |
295 | ||
a9e61274 | 296 | if (lxc_mainloop_open(&descr)) { |
36eb9bde | 297 | ERROR("failed to create mainloop"); |
50c8bf05 | 298 | goto out_sigfd; |
b0a33c1e | 299 | } |
300 | ||
301 | if (lxc_mainloop_add_handler(&descr, sigfd, sigchld_handler, &pid)) { | |
36eb9bde | 302 | ERROR("failed to add handler for the signal"); |
b0a33c1e | 303 | goto out_mainloop_open; |
304 | } | |
305 | ||
63376d7d DL |
306 | if (lxc_console_mainloop_add(&descr, handler)) { |
307 | ERROR("failed to add console handler to mainloop"); | |
308 | goto out_mainloop_open; | |
309 | } | |
310 | ||
563f2f2c DL |
311 | if (lxc_command_mainloop_add(name, &descr, handler)) { |
312 | ERROR("failed to add command handler to mainloop"); | |
96fa1ff0 | 313 | goto out_mainloop_open; |
563f2f2c DL |
314 | } |
315 | ||
316 | if (lxc_utmp_mainloop_add(&descr, handler)) { | |
317 | ERROR("failed to add utmp handler to mainloop"); | |
318 | goto out_mainloop_open; | |
319 | } | |
b0a33c1e | 320 | |
c3e13372 | 321 | return lxc_mainloop(&descr); |
b0a33c1e | 322 | |
323 | out_mainloop_open: | |
324 | lxc_mainloop_close(&descr); | |
b0a33c1e | 325 | out_sigfd: |
326 | close(sigfd); | |
c3e13372 | 327 | return -1; |
b0a33c1e | 328 | } |
329 | ||
fae349da | 330 | struct lxc_handler *lxc_init(const char *name, struct lxc_conf *conf) |
59eb99ba | 331 | { |
3a0f472d DL |
332 | struct lxc_handler *handler; |
333 | ||
334 | handler = malloc(sizeof(*handler)); | |
335 | if (!handler) | |
336 | return NULL; | |
59eb99ba DL |
337 | |
338 | memset(handler, 0, sizeof(*handler)); | |
339 | ||
fae349da DL |
340 | handler->conf = conf; |
341 | ||
3bdf52d7 DL |
342 | handler->name = strdup(name); |
343 | if (!handler->name) { | |
344 | ERROR("failed to allocate memory"); | |
345 | goto out_free; | |
346 | } | |
347 | ||
0ad19a3f | 348 | /* Begin the set the state to STARTING*/ |
25c2aca5 | 349 | if (lxc_set_state(name, handler, STARTING)) { |
59eb99ba | 350 | ERROR("failed to set state '%s'", lxc_state2str(STARTING)); |
3bdf52d7 | 351 | goto out_free_name; |
0ad19a3f | 352 | } |
353 | ||
fae349da | 354 | if (lxc_create_tty(name, conf)) { |
36eb9bde | 355 | ERROR("failed to create the ttys"); |
59eb99ba | 356 | goto out_aborting; |
b0a33c1e | 357 | } |
358 | ||
1560f6c9 | 359 | if (lxc_create_console(conf)) { |
63376d7d DL |
360 | ERROR("failed to create console"); |
361 | goto out_delete_tty; | |
362 | } | |
363 | ||
b0a33c1e | 364 | /* the signal fd has to be created before forking otherwise |
365 | * if the child process exits before we setup the signal fd, | |
366 | * the event will be lost and the command will be stuck */ | |
59eb99ba DL |
367 | handler->sigfd = setup_sigchld_fd(&handler->oldmask); |
368 | if (handler->sigfd < 0) { | |
36eb9bde | 369 | ERROR("failed to set sigchild fd handler"); |
63376d7d | 370 | goto out_delete_console; |
b0a33c1e | 371 | } |
372 | ||
c3e13372 | 373 | INFO("'%s' is initialized", name); |
3a0f472d | 374 | return handler; |
59eb99ba | 375 | |
63376d7d DL |
376 | out_delete_console: |
377 | lxc_delete_console(&conf->console); | |
59eb99ba | 378 | out_delete_tty: |
fae349da | 379 | lxc_delete_tty(&conf->tty_info); |
59eb99ba | 380 | out_aborting: |
25c2aca5 | 381 | lxc_set_state(name, handler, ABORTING); |
3bdf52d7 DL |
382 | out_free_name: |
383 | free(handler->name); | |
384 | handler->name = NULL; | |
3a0f472d DL |
385 | out_free: |
386 | free(handler); | |
c3e13372 | 387 | return NULL; |
59eb99ba DL |
388 | } |
389 | ||
1bc5cc8c | 390 | void lxc_fini(const char *name, struct lxc_handler *handler) |
59eb99ba DL |
391 | { |
392 | /* The STOPPING state is there for future cleanup code | |
393 | * which can take awhile | |
394 | */ | |
25c2aca5 MN |
395 | lxc_set_state(name, handler, STOPPING); |
396 | lxc_set_state(name, handler, STOPPED); | |
59eb99ba | 397 | |
8f64a3f6 MN |
398 | /* reset mask set by setup_sigchld_fd */ |
399 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) | |
400 | WARN("failed to restore sigprocmask"); | |
401 | ||
63376d7d | 402 | lxc_delete_console(&handler->conf->console); |
b2431939 | 403 | lxc_delete_tty(&handler->conf->tty_info); |
3bdf52d7 | 404 | free(handler->name); |
b2431939 | 405 | free(handler); |
59eb99ba DL |
406 | } |
407 | ||
1bc5cc8c | 408 | void lxc_abort(const char *name, struct lxc_handler *handler) |
59eb99ba | 409 | { |
25c2aca5 | 410 | lxc_set_state(name, handler, ABORTING); |
7d9fb3e9 DL |
411 | if (handler->pid > 0) |
412 | kill(handler->pid, SIGKILL); | |
59eb99ba DL |
413 | } |
414 | ||
ffe1e01a | 415 | static int do_start(void *data) |
50e98013 | 416 | { |
23c53af9 | 417 | struct lxc_handler *handler = data; |
50e98013 DL |
418 | |
419 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) { | |
420 | SYSERROR("failed to set sigprocmask"); | |
9d7f9e52 | 421 | return -1; |
50e98013 DL |
422 | } |
423 | ||
3c22086f | 424 | lxc_sync_fini_parent(handler); |
50e98013 | 425 | |
3c22086f CLG |
426 | /* Tell the parent task it can begin to configure the |
427 | * container and wait for it to finish | |
428 | */ | |
429 | if (lxc_sync_barrier_parent(handler, LXC_SYNC_CONFIGURE)) | |
9d7f9e52 | 430 | return -1; |
50e98013 DL |
431 | |
432 | /* Setup the container, ip, names, utsname, ... */ | |
ffe1e01a | 433 | if (lxc_setup(handler->name, handler->conf)) { |
50e98013 DL |
434 | ERROR("failed to setup the container"); |
435 | goto out_warn_father; | |
436 | } | |
437 | ||
438 | if (prctl(PR_CAPBSET_DROP, CAP_SYS_BOOT, 0, 0, 0)) { | |
439 | SYSERROR("failed to remove CAP_SYS_BOOT capability"); | |
9d7f9e52 | 440 | return -1; |
50e98013 DL |
441 | } |
442 | ||
6a6ad7af DL |
443 | if (prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0)) { |
444 | SYSERROR("failed to set pdeath signal"); | |
9d7f9e52 | 445 | return -1; |
6a6ad7af DL |
446 | } |
447 | ||
fc25b815 MN |
448 | close(handler->sigfd); |
449 | ||
e6126dbe MN |
450 | /* after this call, we are in error because this |
451 | * ops should not return as it execs */ | |
23c53af9 | 452 | if (handler->ops->start(handler, handler->data)) |
e6126dbe | 453 | return -1; |
50e98013 DL |
454 | |
455 | out_warn_father: | |
3c22086f | 456 | lxc_sync_wake_parent(handler, LXC_SYNC_POST_CONFIGURE); |
50e98013 DL |
457 | return -1; |
458 | } | |
459 | ||
23c53af9 | 460 | int lxc_spawn(struct lxc_handler *handler) |
59eb99ba | 461 | { |
59eb99ba | 462 | int clone_flags; |
99a6af52 | 463 | int failed_before_rename = 0; |
ffe1e01a | 464 | const char *name = handler->name; |
50e98013 | 465 | |
3c22086f | 466 | if (lxc_sync_init(handler)) |
9d7f9e52 | 467 | return -1; |
0ad19a3f | 468 | |
1ea6db29 | 469 | clone_flags = CLONE_NEWUTS|CLONE_NEWPID|CLONE_NEWIPC|CLONE_NEWNS; |
fae349da | 470 | if (!lxc_list_empty(&handler->conf->network)) { |
82d5ae15 | 471 | |
0ad19a3f | 472 | clone_flags |= CLONE_NEWNET; |
473 | ||
82d5ae15 DL |
474 | /* that should be done before the clone because we will |
475 | * fill the netdev index and use them in the child | |
476 | */ | |
fae349da | 477 | if (lxc_create_network(&handler->conf->network)) { |
82d5ae15 | 478 | ERROR("failed to create the network"); |
3c22086f | 479 | lxc_sync_fini(handler); |
32e1c760 | 480 | return -1; |
82d5ae15 DL |
481 | } |
482 | } | |
483 | ||
ffe1e01a | 484 | |
0ad19a3f | 485 | /* Create a process in a new set of namespaces */ |
23c53af9 | 486 | handler->pid = lxc_clone(do_start, handler, clone_flags); |
59eb99ba | 487 | if (handler->pid < 0) { |
36eb9bde | 488 | SYSERROR("failed to fork into a new namespace"); |
7fef7a06 | 489 | goto out_delete_net; |
0ad19a3f | 490 | } |
491 | ||
3c22086f CLG |
492 | lxc_sync_fini_child(handler); |
493 | ||
494 | if (lxc_sync_wait_child(handler, LXC_SYNC_CONFIGURE)) | |
99a6af52 | 495 | failed_before_rename = 1; |
0ad19a3f | 496 | |
9f44c578 | 497 | if (lxc_rename_nsgroup(name, handler)) |
7fef7a06 | 498 | goto out_delete_net; |
218d4250 | 499 | |
99a6af52 MN |
500 | if (failed_before_rename) |
501 | goto out_delete_net; | |
502 | ||
0ad19a3f | 503 | /* Create the network configuration */ |
82d5ae15 | 504 | if (clone_flags & CLONE_NEWNET) { |
fae349da | 505 | if (lxc_assign_network(&handler->conf->network, handler->pid)) { |
82d5ae15 | 506 | ERROR("failed to create the configured network"); |
7fef7a06 | 507 | goto out_delete_net; |
82d5ae15 | 508 | } |
0ad19a3f | 509 | } |
510 | ||
3c22086f CLG |
511 | /* Tell the child to continue its initialization and wait for |
512 | * it to exec or return an error | |
513 | */ | |
514 | if (lxc_sync_barrier_child(handler, LXC_SYNC_POST_CONFIGURE)) | |
515 | return -1; | |
0ad19a3f | 516 | |
23c53af9 | 517 | if (handler->ops->post_start(handler, handler->data)) |
e6126dbe MN |
518 | goto out_abort; |
519 | ||
25c2aca5 | 520 | if (lxc_set_state(name, handler, RUNNING)) { |
59eb99ba DL |
521 | ERROR("failed to set state to %s", |
522 | lxc_state2str(RUNNING)); | |
523 | goto out_abort; | |
3f21c114 | 524 | } |
22ebac19 | 525 | |
3c22086f | 526 | lxc_sync_fini(handler); |
e6126dbe | 527 | return 0; |
1ac470c0 | 528 | |
7fef7a06 DL |
529 | out_delete_net: |
530 | if (clone_flags & CLONE_NEWNET) | |
531 | lxc_delete_network(&handler->conf->network); | |
59eb99ba DL |
532 | out_abort: |
533 | lxc_abort(name, handler); | |
3c22086f | 534 | lxc_sync_fini(handler); |
b79fcd86 | 535 | return -1; |
59eb99ba | 536 | } |
0ad19a3f | 537 | |
ee70bf78 CLG |
538 | int __lxc_start(const char *name, struct lxc_conf *conf, |
539 | struct lxc_operations* ops, void *data) | |
59eb99ba | 540 | { |
3a0f472d | 541 | struct lxc_handler *handler; |
e043236e | 542 | int err = -1; |
59eb99ba | 543 | int status; |
80090207 | 544 | |
fae349da | 545 | handler = lxc_init(name, conf); |
3a0f472d | 546 | if (!handler) { |
59eb99ba | 547 | ERROR("failed to initialize the container"); |
66aeffc7 | 548 | return -1; |
0ad19a3f | 549 | } |
ee70bf78 CLG |
550 | handler->ops = ops; |
551 | handler->data = data; | |
e6126dbe | 552 | |
23c53af9 | 553 | err = lxc_spawn(handler); |
59eb99ba | 554 | if (err) { |
ee70bf78 | 555 | ERROR("failed to spawn '%s'", name); |
9d7f9e52 | 556 | goto out_fini; |
0ad19a3f | 557 | } |
558 | ||
69ffa311 MN |
559 | /* Avoid signals from terminal */ |
560 | LXC_TTY_ADD_HANDLER(SIGINT); | |
561 | LXC_TTY_ADD_HANDLER(SIGQUIT); | |
562 | ||
3a0f472d | 563 | err = lxc_poll(name, handler); |
e043236e | 564 | if (err) { |
59eb99ba DL |
565 | ERROR("mainloop exited with an error"); |
566 | goto out_abort; | |
567 | } | |
0ad19a3f | 568 | |
3a0f472d | 569 | while (waitpid(handler->pid, &status, 0) < 0 && errno == EINTR) |
1bc5cc8c | 570 | continue; |
e043236e | 571 | |
3a0f472d | 572 | err = lxc_error_set_and_log(handler->pid, status); |
9d7f9e52 | 573 | out_fini: |
69ffa311 MN |
574 | LXC_TTY_DEL_HANDLER(SIGQUIT); |
575 | LXC_TTY_DEL_HANDLER(SIGINT); | |
4d2e2ec6 | 576 | lxc_unlink_nsgroup(name); |
3a0f472d | 577 | lxc_fini(name, handler); |
0ad19a3f | 578 | return err; |
579 | ||
59eb99ba | 580 | out_abort: |
3a0f472d | 581 | lxc_abort(name, handler); |
9d7f9e52 | 582 | goto out_fini; |
0ad19a3f | 583 | } |
ee70bf78 CLG |
584 | |
585 | struct start_args { | |
586 | char *const *argv; | |
587 | }; | |
588 | ||
589 | static int start(struct lxc_handler *handler, void* data) | |
590 | { | |
591 | struct start_args *arg = data; | |
592 | ||
593 | NOTICE("exec'ing '%s'", arg->argv[0]); | |
594 | ||
595 | execvp(arg->argv[0], arg->argv); | |
596 | SYSERROR("failed to exec %s", arg->argv[0]); | |
597 | return 0; | |
598 | } | |
599 | ||
600 | static int post_start(struct lxc_handler *handler, void* data) | |
601 | { | |
602 | struct start_args *arg = data; | |
603 | ||
604 | NOTICE("'%s' started with pid '%d'", arg->argv[0], handler->pid); | |
605 | return 0; | |
606 | } | |
607 | ||
608 | static struct lxc_operations start_ops = { | |
609 | .start = start, | |
610 | .post_start = post_start | |
611 | }; | |
612 | ||
613 | int lxc_start(const char *name, char *const argv[], struct lxc_conf *conf) | |
614 | { | |
615 | struct start_args start_arg = { | |
616 | .argv = argv, | |
617 | }; | |
618 | ||
619 | if (lxc_check_inherited(-1)) | |
620 | return -1; | |
621 | ||
622 | return __lxc_start(name, conf, &start_ops, &start_arg); | |
623 | } |