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Commit | Line | Data |
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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
0ad19a3f | 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 | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
0ad19a3f | 22 | */ |
23 | ||
f549edcc GK |
24 | #include "config.h" |
25 | ||
0ad19a3f | 26 | #include <stdio.h> |
27 | #undef _GNU_SOURCE | |
28 | #include <string.h> | |
29 | #include <stdlib.h> | |
30 | #include <dirent.h> | |
31 | #include <errno.h> | |
32 | #include <unistd.h> | |
33 | #include <signal.h> | |
b0a33c1e | 34 | #include <fcntl.h> |
35 | #include <termios.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> |
8173e600 | 41 | #include <sys/socket.h> |
0ad19a3f | 42 | #include <sys/prctl.h> |
ddceb1f9 | 43 | #include <sys/types.h> |
0ad19a3f | 44 | #include <sys/wait.h> |
b0a33c1e | 45 | #include <sys/un.h> |
46 | #include <sys/poll.h> | |
8173e600 | 47 | #include <sys/syscall.h> |
ff218c25 | 48 | |
495d2046 SG |
49 | #if HAVE_SYS_CAPABILITY_H |
50 | #include <sys/capability.h> | |
51 | #endif | |
52 | ||
656994bb MH |
53 | #if !HAVE_DECL_PR_CAPBSET_DROP |
54 | #define PR_CAPBSET_DROP 24 | |
55 | #endif | |
56 | ||
63376d7d DL |
57 | #include "start.h" |
58 | #include "conf.h" | |
59 | #include "log.h" | |
563f2f2c | 60 | #include "cgroup.h" |
e2bcd7db | 61 | #include "error.h" |
b0a33c1e | 62 | #include "af_unix.h" |
63 | #include "mainloop.h" | |
63376d7d | 64 | #include "utils.h" |
565c2d76 | 65 | #include "lxcutmp.h" |
63376d7d | 66 | #include "monitor.h" |
96fa1ff0 | 67 | #include "commands.h" |
63376d7d | 68 | #include "console.h" |
3c22086f | 69 | #include "sync.h" |
f549edcc | 70 | #include "namespace.h" |
0d0527a9 | 71 | #include "lxcseccomp.h" |
8173e600 | 72 | #include "caps.h" |
025ed0f3 | 73 | #include "lxclock.h" |
fe4de9a6 | 74 | #include "lsm/lsm.h" |
36eb9bde CLG |
75 | |
76 | lxc_log_define(lxc_start, lxc); | |
77 | ||
9f30a190 MM |
78 | const struct ns_info ns_info[LXC_NS_MAX] = { |
79 | [LXC_NS_MNT] = {"mnt", CLONE_NEWNS}, | |
80 | [LXC_NS_PID] = {"pid", CLONE_NEWPID}, | |
81 | [LXC_NS_UTS] = {"uts", CLONE_NEWUTS}, | |
82 | [LXC_NS_IPC] = {"ipc", CLONE_NEWIPC}, | |
83 | [LXC_NS_USER] = {"user", CLONE_NEWUSER}, | |
84 | [LXC_NS_NET] = {"net", CLONE_NEWNET} | |
85 | }; | |
86 | ||
87 | static void close_ns(int ns_fd[LXC_NS_MAX]) { | |
88 | int i; | |
89 | ||
90 | process_lock(); | |
91 | for (i = 0; i < LXC_NS_MAX; i++) { | |
92 | if (ns_fd[i] > -1) { | |
93 | close(ns_fd[i]); | |
94 | ns_fd[i] = -1; | |
95 | } | |
96 | } | |
97 | process_unlock(); | |
98 | } | |
99 | ||
100 | static int preserve_ns(int ns_fd[LXC_NS_MAX], int clone_flags) { | |
101 | int i, saved_errno; | |
102 | char path[MAXPATHLEN]; | |
103 | ||
104 | if (access("/proc/self/ns", X_OK)) { | |
105 | ERROR("Does this kernel version support 'attach'?"); | |
106 | return -1; | |
107 | } | |
108 | ||
109 | for (i = 0; i < LXC_NS_MAX; i++) | |
110 | ns_fd[i] = -1; | |
111 | ||
112 | for (i = 0; i < LXC_NS_MAX; i++) { | |
113 | if ((clone_flags & ns_info[i].clone_flag) == 0) | |
114 | continue; | |
115 | snprintf(path, MAXPATHLEN, "/proc/self/ns/%s", ns_info[i].proc_name); | |
116 | process_lock(); | |
117 | ns_fd[i] = open(path, O_RDONLY | O_CLOEXEC); | |
118 | process_unlock(); | |
119 | if (ns_fd[i] < 0) | |
120 | goto error; | |
121 | } | |
122 | ||
123 | return 0; | |
124 | ||
125 | error: | |
126 | saved_errno = errno; | |
127 | close_ns(ns_fd); | |
128 | errno = saved_errno; | |
129 | SYSERROR("failed to open '%s'", path); | |
130 | return -1; | |
131 | } | |
132 | ||
133 | static int attach_ns(const int ns_fd[LXC_NS_MAX]) { | |
134 | int i; | |
135 | ||
136 | for (i = 0; i < LXC_NS_MAX; i++) { | |
137 | if (ns_fd[i] < 0) | |
138 | continue; | |
139 | ||
140 | if (setns(ns_fd[i], 0) != 0) | |
141 | goto error; | |
142 | } | |
143 | return 0; | |
144 | ||
145 | error: | |
146 | SYSERROR("failed to set namespace '%s'", ns_info[i].proc_name); | |
147 | return -1; | |
148 | } | |
149 | ||
80090207 CLG |
150 | static int match_fd(int fd) |
151 | { | |
152 | return (fd == 0 || fd == 1 || fd == 2); | |
153 | } | |
154 | ||
b119f362 | 155 | int lxc_check_inherited(struct lxc_conf *conf, int fd_to_ignore) |
80090207 CLG |
156 | { |
157 | struct dirent dirent, *direntp; | |
158 | int fd, fddir; | |
159 | DIR *dir; | |
80090207 | 160 | |
b119f362 | 161 | restart: |
025ed0f3 | 162 | process_lock(); |
80090207 | 163 | dir = opendir("/proc/self/fd"); |
025ed0f3 | 164 | process_unlock(); |
80090207 CLG |
165 | if (!dir) { |
166 | WARN("failed to open directory: %m"); | |
167 | return -1; | |
168 | } | |
169 | ||
170 | fddir = dirfd(dir); | |
171 | ||
172 | while (!readdir_r(dir, &dirent, &direntp)) { | |
80090207 CLG |
173 | if (!direntp) |
174 | break; | |
175 | ||
176 | if (!strcmp(direntp->d_name, ".")) | |
177 | continue; | |
178 | ||
179 | if (!strcmp(direntp->d_name, "..")) | |
180 | continue; | |
181 | ||
182 | fd = atoi(direntp->d_name); | |
183 | ||
f2faa8fa | 184 | if (fd == fddir || fd == lxc_log_fd || fd == fd_to_ignore) |
80090207 CLG |
185 | continue; |
186 | ||
187 | if (match_fd(fd)) | |
188 | continue; | |
80090207 | 189 | |
b119f362 | 190 | if (conf->close_all_fds) { |
025ed0f3 | 191 | process_lock(); |
b119f362 SH |
192 | close(fd); |
193 | closedir(dir); | |
025ed0f3 | 194 | process_unlock(); |
b119f362 SH |
195 | INFO("closed inherited fd %d", fd); |
196 | goto restart; | |
197 | } | |
92c7f629 | 198 | WARN("inherited fd %d", fd); |
80090207 CLG |
199 | } |
200 | ||
025ed0f3 | 201 | process_lock(); |
92c7f629 | 202 | closedir(dir); /* cannot fail */ |
025ed0f3 | 203 | process_unlock(); |
92c7f629 | 204 | return 0; |
80090207 CLG |
205 | } |
206 | ||
83ee7875 | 207 | static int setup_signal_fd(sigset_t *oldmask) |
b0a33c1e | 208 | { |
209 | sigset_t mask; | |
210 | int fd; | |
211 | ||
f3304a29 FW |
212 | /* Block everything except serious error signals */ |
213 | if (sigfillset(&mask) || | |
214 | sigdelset(&mask, SIGILL) || | |
215 | sigdelset(&mask, SIGSEGV) || | |
216 | sigdelset(&mask, SIGBUS) || | |
b5159817 | 217 | sigdelset(&mask, SIGWINCH) || |
f3304a29 FW |
218 | sigprocmask(SIG_BLOCK, &mask, oldmask)) { |
219 | SYSERROR("failed to set signal mask"); | |
b0a33c1e | 220 | return -1; |
221 | } | |
222 | ||
223 | fd = signalfd(-1, &mask, 0); | |
224 | if (fd < 0) { | |
36eb9bde | 225 | SYSERROR("failed to create the signal fd"); |
b0a33c1e | 226 | return -1; |
227 | } | |
228 | ||
229 | if (fcntl(fd, F_SETFD, FD_CLOEXEC)) { | |
36eb9bde | 230 | SYSERROR("failed to set sigfd to close-on-exec"); |
b0a33c1e | 231 | close(fd); |
232 | return -1; | |
233 | } | |
234 | ||
1ac470c0 DL |
235 | DEBUG("sigchild handler set"); |
236 | ||
b0a33c1e | 237 | return fd; |
238 | } | |
239 | ||
84c92abd | 240 | static int signal_handler(int fd, uint32_t events, void *data, |
b0a33c1e | 241 | struct lxc_epoll_descr *descr) |
242 | { | |
15cd25fd | 243 | struct signalfd_siginfo siginfo; |
80507ee8 | 244 | siginfo_t info; |
15cd25fd | 245 | int ret; |
82d89dce | 246 | pid_t *pid = data; |
80507ee8 | 247 | bool init_died = false; |
15cd25fd DL |
248 | |
249 | ret = read(fd, &siginfo, sizeof(siginfo)); | |
250 | if (ret < 0) { | |
f3304a29 | 251 | ERROR("failed to read signal info"); |
15cd25fd DL |
252 | return -1; |
253 | } | |
254 | ||
255 | if (ret != sizeof(siginfo)) { | |
256 | ERROR("unexpected siginfo size"); | |
257 | return -1; | |
258 | } | |
259 | ||
80507ee8 SH |
260 | // check whether init is running |
261 | info.si_pid = 0; | |
262 | ret = waitid(P_PID, *pid, &info, WEXITED | WNOWAIT | WNOHANG); | |
263 | if (ret == 0 && info.si_pid == *pid) { | |
264 | init_died = true; | |
265 | } | |
266 | ||
f3304a29 FW |
267 | if (siginfo.ssi_signo != SIGCHLD) { |
268 | kill(*pid, siginfo.ssi_signo); | |
269 | INFO("forwarded signal %d to pid %d", siginfo.ssi_signo, *pid); | |
80507ee8 | 270 | return init_died ? 1 : 0; |
f3304a29 FW |
271 | } |
272 | ||
15cd25fd DL |
273 | if (siginfo.ssi_code == CLD_STOPPED || |
274 | siginfo.ssi_code == CLD_CONTINUED) { | |
275 | INFO("container init process was stopped/continued"); | |
80507ee8 | 276 | return init_died ? 1 : 0; |
15cd25fd | 277 | } |
1ac470c0 | 278 | |
82d89dce DL |
279 | /* more robustness, protect ourself from a SIGCHLD sent |
280 | * by a process different from the container init | |
281 | */ | |
282 | if (siginfo.ssi_pid != *pid) { | |
283 | WARN("invalid pid for SIGCHLD"); | |
80507ee8 | 284 | return init_died ? 1 : 0; |
82d89dce DL |
285 | } |
286 | ||
15cd25fd | 287 | DEBUG("container init process exited"); |
b0a33c1e | 288 | return 1; |
289 | } | |
290 | ||
25c2aca5 | 291 | int lxc_set_state(const char *name, struct lxc_handler *handler, lxc_state_t state) |
66aeffc7 DL |
292 | { |
293 | handler->state = state; | |
9123e471 | 294 | lxc_monitor_send_state(name, state, handler->lxcpath); |
66aeffc7 DL |
295 | return 0; |
296 | } | |
297 | ||
1bc5cc8c | 298 | int lxc_poll(const char *name, struct lxc_handler *handler) |
b0a33c1e | 299 | { |
ca5f7926 DL |
300 | int sigfd = handler->sigfd; |
301 | int pid = handler->pid; | |
b0a33c1e | 302 | struct lxc_epoll_descr descr; |
303 | ||
a9e61274 | 304 | if (lxc_mainloop_open(&descr)) { |
36eb9bde | 305 | ERROR("failed to create mainloop"); |
50c8bf05 | 306 | goto out_sigfd; |
b0a33c1e | 307 | } |
308 | ||
83ee7875 | 309 | if (lxc_mainloop_add_handler(&descr, sigfd, signal_handler, &pid)) { |
36eb9bde | 310 | ERROR("failed to add handler for the signal"); |
b0a33c1e | 311 | goto out_mainloop_open; |
312 | } | |
313 | ||
63376d7d DL |
314 | if (lxc_console_mainloop_add(&descr, handler)) { |
315 | ERROR("failed to add console handler to mainloop"); | |
316 | goto out_mainloop_open; | |
317 | } | |
318 | ||
ef6e34ee | 319 | if (lxc_cmd_mainloop_add(name, &descr, handler)) { |
563f2f2c | 320 | ERROR("failed to add command handler to mainloop"); |
96fa1ff0 | 321 | goto out_mainloop_open; |
563f2f2c DL |
322 | } |
323 | ||
828695d9 | 324 | if (handler->conf->need_utmp_watch) { |
495d2046 | 325 | #if HAVE_SYS_CAPABILITY_H |
828695d9 SH |
326 | if (lxc_utmp_mainloop_add(&descr, handler)) { |
327 | ERROR("failed to add utmp handler to mainloop"); | |
328 | goto out_mainloop_open; | |
329 | } | |
495d2046 SG |
330 | #else |
331 | DEBUG("not starting utmp handler as cap_sys_boot cannot be dropped without capabilities support\n"); | |
332 | #endif | |
563f2f2c | 333 | } |
b0a33c1e | 334 | |
e51d4895 | 335 | return lxc_mainloop(&descr, -1); |
b0a33c1e | 336 | |
337 | out_mainloop_open: | |
338 | lxc_mainloop_close(&descr); | |
b0a33c1e | 339 | out_sigfd: |
025ed0f3 | 340 | process_lock(); |
b0a33c1e | 341 | close(sigfd); |
025ed0f3 | 342 | process_unlock(); |
c3e13372 | 343 | return -1; |
b0a33c1e | 344 | } |
345 | ||
13f5be62 | 346 | struct lxc_handler *lxc_init(const char *name, struct lxc_conf *conf, const char *lxcpath) |
59eb99ba | 347 | { |
3a0f472d DL |
348 | struct lxc_handler *handler; |
349 | ||
350 | handler = malloc(sizeof(*handler)); | |
351 | if (!handler) | |
352 | return NULL; | |
59eb99ba DL |
353 | |
354 | memset(handler, 0, sizeof(*handler)); | |
355 | ||
fae349da | 356 | handler->conf = conf; |
9123e471 | 357 | handler->lxcpath = lxcpath; |
5c068da9 | 358 | handler->pinfd = -1; |
fae349da | 359 | |
fe4de9a6 DE |
360 | lsm_init(); |
361 | ||
3bdf52d7 DL |
362 | handler->name = strdup(name); |
363 | if (!handler->name) { | |
364 | ERROR("failed to allocate memory"); | |
365 | goto out_free; | |
366 | } | |
367 | ||
ef6e34ee | 368 | if (lxc_cmd_init(name, handler, lxcpath)) |
d2e30e99 DE |
369 | goto out_free_name; |
370 | ||
8f2c3a70 SH |
371 | if (lxc_read_seccomp_config(conf) != 0) { |
372 | ERROR("failed loading seccomp policy"); | |
d2e30e99 | 373 | goto out_close_maincmd_fd; |
8f2c3a70 SH |
374 | } |
375 | ||
051151de | 376 | /* Begin by setting the state to STARTING */ |
25c2aca5 | 377 | if (lxc_set_state(name, handler, STARTING)) { |
59eb99ba | 378 | ERROR("failed to set state '%s'", lxc_state2str(STARTING)); |
051151de | 379 | goto out_close_maincmd_fd; |
0ad19a3f | 380 | } |
381 | ||
f7bee6c6 MW |
382 | /* Start of environment variable setup for hooks */ |
383 | if (setenv("LXC_NAME", name, 1)) { | |
384 | SYSERROR("failed to set environment variable for container name"); | |
385 | } | |
386 | if (setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) { | |
387 | SYSERROR("failed to set environment variable for config path"); | |
388 | } | |
389 | if (setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) { | |
390 | SYSERROR("failed to set environment variable for rootfs mount"); | |
391 | } | |
392 | if (setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) { | |
393 | SYSERROR("failed to set environment variable for rootfs mount"); | |
394 | } | |
395 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) { | |
396 | SYSERROR("failed to set environment variable for console path"); | |
397 | } | |
398 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) { | |
399 | SYSERROR("failed to set environment variable for console log"); | |
400 | } | |
401 | /* End of environment variable setup for hooks */ | |
402 | ||
283678ed | 403 | if (run_lxc_hooks(name, "pre-start", conf, handler->lxcpath, NULL)) { |
773fb9ca SH |
404 | ERROR("failed to run pre-start hooks for container '%s'.", name); |
405 | goto out_aborting; | |
406 | } | |
26ddeedd | 407 | |
fae349da | 408 | if (lxc_create_tty(name, conf)) { |
36eb9bde | 409 | ERROR("failed to create the ttys"); |
59eb99ba | 410 | goto out_aborting; |
b0a33c1e | 411 | } |
412 | ||
413 | /* the signal fd has to be created before forking otherwise | |
414 | * if the child process exits before we setup the signal fd, | |
415 | * the event will be lost and the command will be stuck */ | |
83ee7875 | 416 | handler->sigfd = setup_signal_fd(&handler->oldmask); |
59eb99ba | 417 | if (handler->sigfd < 0) { |
36eb9bde | 418 | ERROR("failed to set sigchild fd handler"); |
b5159817 DE |
419 | goto out_delete_tty; |
420 | } | |
421 | ||
422 | /* do this after setting up signals since it might unblock SIGWINCH */ | |
423 | if (lxc_console_create(conf)) { | |
424 | ERROR("failed to create console"); | |
425 | goto out_restore_sigmask; | |
b0a33c1e | 426 | } |
427 | ||
c4d10a05 SH |
428 | if (ttys_shift_ids(conf) < 0) { |
429 | ERROR("Failed to shift tty into container"); | |
430 | goto out_restore_sigmask; | |
431 | } | |
432 | ||
c3e13372 | 433 | INFO("'%s' is initialized", name); |
3a0f472d | 434 | return handler; |
59eb99ba | 435 | |
b5159817 DE |
436 | out_restore_sigmask: |
437 | sigprocmask(SIG_SETMASK, &handler->oldmask, NULL); | |
59eb99ba | 438 | out_delete_tty: |
fae349da | 439 | lxc_delete_tty(&conf->tty_info); |
59eb99ba | 440 | out_aborting: |
25c2aca5 | 441 | lxc_set_state(name, handler, ABORTING); |
d2e30e99 | 442 | out_close_maincmd_fd: |
025ed0f3 | 443 | process_lock(); |
d2e30e99 | 444 | close(conf->maincmd_fd); |
025ed0f3 | 445 | process_unlock(); |
d2e30e99 | 446 | conf->maincmd_fd = -1; |
3bdf52d7 DL |
447 | out_free_name: |
448 | free(handler->name); | |
449 | handler->name = NULL; | |
3a0f472d DL |
450 | out_free: |
451 | free(handler); | |
c3e13372 | 452 | return NULL; |
59eb99ba DL |
453 | } |
454 | ||
ae5c8b8e | 455 | static void lxc_fini(const char *name, struct lxc_handler *handler) |
59eb99ba DL |
456 | { |
457 | /* The STOPPING state is there for future cleanup code | |
458 | * which can take awhile | |
459 | */ | |
25c2aca5 MN |
460 | lxc_set_state(name, handler, STOPPING); |
461 | lxc_set_state(name, handler, STOPPED); | |
59eb99ba | 462 | |
283678ed | 463 | if (run_lxc_hooks(name, "post-stop", handler->conf, handler->lxcpath, NULL)) |
773fb9ca | 464 | ERROR("failed to run post-stop hooks for container '%s'.", name); |
26ddeedd | 465 | |
83ee7875 | 466 | /* reset mask set by setup_signal_fd */ |
8f64a3f6 MN |
467 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) |
468 | WARN("failed to restore sigprocmask"); | |
469 | ||
b5159817 | 470 | lxc_console_delete(&handler->conf->console); |
b2431939 | 471 | lxc_delete_tty(&handler->conf->tty_info); |
025ed0f3 | 472 | process_lock(); |
d2e30e99 | 473 | close(handler->conf->maincmd_fd); |
025ed0f3 | 474 | process_unlock(); |
d2e30e99 | 475 | handler->conf->maincmd_fd = -1; |
3bdf52d7 | 476 | free(handler->name); |
ae5c8b8e | 477 | if (handler->cgroup) { |
33ad9f1a | 478 | lxc_cgroup_process_info_free_and_remove(handler->cgroup); |
ae5c8b8e SH |
479 | handler->cgroup = NULL; |
480 | } | |
b2431939 | 481 | free(handler); |
59eb99ba DL |
482 | } |
483 | ||
1bc5cc8c | 484 | void lxc_abort(const char *name, struct lxc_handler *handler) |
59eb99ba | 485 | { |
73e608b2 SH |
486 | int ret, status; |
487 | ||
25c2aca5 | 488 | lxc_set_state(name, handler, ABORTING); |
7d9fb3e9 DL |
489 | if (handler->pid > 0) |
490 | kill(handler->pid, SIGKILL); | |
73e608b2 | 491 | while ((ret = waitpid(-1, &status, 0)) > 0) ; |
59eb99ba DL |
492 | } |
493 | ||
828695d9 SH |
494 | #include <sys/reboot.h> |
495 | #include <linux/reboot.h> | |
496 | ||
e2fa1520 SH |
497 | /* |
498 | * reboot(LINUX_REBOOT_CMD_CAD_ON) will return -EINVAL | |
499 | * in a child pid namespace if container reboot support exists. | |
500 | * Otherwise, it will either succeed or return -EPERM. | |
501 | */ | |
502 | static int container_reboot_supported(void *arg) | |
828695d9 | 503 | { |
e2fa1520 | 504 | int *cmd = arg; |
828695d9 | 505 | int ret; |
828695d9 | 506 | |
e2fa1520 SH |
507 | ret = reboot(*cmd); |
508 | if (ret == -1 && errno == EINVAL) | |
509 | return 1; | |
510 | return 0; | |
511 | } | |
512 | ||
b60ed720 | 513 | static int must_drop_cap_sys_boot(struct lxc_conf *conf) |
e2fa1520 | 514 | { |
025ed0f3 | 515 | FILE *f; |
b60ed720 | 516 | int ret, cmd, v, flags; |
e2fa1520 | 517 | long stack_size = 4096; |
7f145a6d | 518 | void *stack = alloca(stack_size); |
e2fa1520 SH |
519 | int status; |
520 | pid_t pid; | |
521 | ||
025ed0f3 SH |
522 | process_lock(); |
523 | f = fopen("/proc/sys/kernel/ctrl-alt-del", "r"); | |
524 | process_unlock(); | |
e2fa1520 SH |
525 | if (!f) { |
526 | DEBUG("failed to open /proc/sys/kernel/ctrl-alt-del"); | |
828695d9 | 527 | return 1; |
e2fa1520 | 528 | } |
828695d9 SH |
529 | |
530 | ret = fscanf(f, "%d", &v); | |
025ed0f3 | 531 | process_lock(); |
828695d9 | 532 | fclose(f); |
025ed0f3 | 533 | process_unlock(); |
e2fa1520 SH |
534 | if (ret != 1) { |
535 | DEBUG("Failed to read /proc/sys/kernel/ctrl-alt-del"); | |
828695d9 | 536 | return 1; |
e2fa1520 SH |
537 | } |
538 | cmd = v ? LINUX_REBOOT_CMD_CAD_ON : LINUX_REBOOT_CMD_CAD_OFF; | |
539 | ||
b60ed720 SH |
540 | flags = CLONE_NEWPID | SIGCHLD; |
541 | if (!lxc_list_empty(&conf->id_map)) | |
542 | flags |= CLONE_NEWUSER; | |
543 | ||
7f145a6d | 544 | #ifdef __ia64__ |
b60ed720 | 545 | pid = __clone2(container_reboot_supported, stack, stack_size, flags, &cmd); |
7f145a6d DS |
546 | #else |
547 | stack += stack_size; | |
b60ed720 | 548 | pid = clone(container_reboot_supported, stack, flags, &cmd); |
7f145a6d | 549 | #endif |
e2fa1520 SH |
550 | if (pid < 0) { |
551 | SYSERROR("failed to clone\n"); | |
552 | return -1; | |
553 | } | |
554 | if (wait(&status) < 0) { | |
555 | SYSERROR("unexpected wait error: %m\n"); | |
556 | return -1; | |
557 | } | |
558 | ||
559 | if (WEXITSTATUS(status) != 1) | |
828695d9 | 560 | return 1; |
e2fa1520 | 561 | |
828695d9 SH |
562 | return 0; |
563 | } | |
564 | ||
ffe1e01a | 565 | static int do_start(void *data) |
50e98013 | 566 | { |
23c53af9 | 567 | struct lxc_handler *handler = data; |
e0b6898a | 568 | const char *lsm_label = NULL; |
50e98013 DL |
569 | |
570 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) { | |
571 | SYSERROR("failed to set sigprocmask"); | |
9d7f9e52 | 572 | return -1; |
50e98013 DL |
573 | } |
574 | ||
743ecd2e DL |
575 | /* This prctl must be before the synchro, so if the parent |
576 | * dies before we set the parent death signal, we will detect | |
577 | * its death with the synchro right after, otherwise we have | |
578 | * a window where the parent can exit before we set the pdeath | |
579 | * signal leading to a unsupervized container. | |
580 | */ | |
581 | if (prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0)) { | |
582 | SYSERROR("failed to set pdeath signal"); | |
583 | return -1; | |
584 | } | |
585 | ||
3c22086f | 586 | lxc_sync_fini_parent(handler); |
50e98013 | 587 | |
2b0e17e4 | 588 | /* don't leak the pinfd to the container */ |
025ed0f3 SH |
589 | if (handler->pinfd >= 0) { |
590 | process_lock(); | |
0d03360a | 591 | close(handler->pinfd); |
025ed0f3 SH |
592 | process_unlock(); |
593 | } | |
2b0e17e4 | 594 | |
3c22086f CLG |
595 | /* Tell the parent task it can begin to configure the |
596 | * container and wait for it to finish | |
597 | */ | |
598 | if (lxc_sync_barrier_parent(handler, LXC_SYNC_CONFIGURE)) | |
9d7f9e52 | 599 | return -1; |
50e98013 | 600 | |
f6d3e3e4 SH |
601 | /* |
602 | * if we are in a new user namespace, become root there to have | |
603 | * privilege over our namespace | |
604 | */ | |
605 | if (!lxc_list_empty(&handler->conf->id_map)) { | |
606 | NOTICE("switching to gid/uid 0 in new user namespace"); | |
607 | if (setgid(0)) { | |
608 | SYSERROR("setgid"); | |
609 | goto out_warn_father; | |
610 | } | |
611 | if (setuid(0)) { | |
612 | SYSERROR("setuid"); | |
613 | goto out_warn_father; | |
614 | } | |
615 | } | |
616 | ||
495d2046 | 617 | #if HAVE_SYS_CAPABILITY_H |
69182a31 | 618 | if (handler->conf->need_utmp_watch) { |
828695d9 SH |
619 | if (prctl(PR_CAPBSET_DROP, CAP_SYS_BOOT, 0, 0, 0)) { |
620 | SYSERROR("failed to remove CAP_SYS_BOOT capability"); | |
c4ea60df | 621 | goto out_warn_father; |
828695d9 | 622 | } |
e2fa1520 | 623 | DEBUG("Dropped cap_sys_boot\n"); |
e2fa1520 | 624 | } |
495d2046 | 625 | #endif |
e2fa1520 SH |
626 | |
627 | /* Setup the container, ip, names, utsname, ... */ | |
bc6928ff | 628 | if (lxc_setup(handler->name, handler->conf, handler->lxcpath, handler->cgroup, handler->data) ){ |
e2fa1520 SH |
629 | ERROR("failed to setup the container"); |
630 | goto out_warn_father; | |
631 | } | |
50e98013 | 632 | |
544a48a0 SH |
633 | /* ask father to setup cgroups and wait for him to finish */ |
634 | if (lxc_sync_barrier_parent(handler, LXC_SYNC_CGROUP)) | |
635 | return -1; | |
636 | ||
72863294 | 637 | /* Set the label to change to when we exec(2) the container's init */ |
e0b6898a DE |
638 | if (!strcmp(lsm_name(), "AppArmor")) |
639 | lsm_label = handler->conf->lsm_aa_profile; | |
640 | else if (!strcmp(lsm_name(), "SELinux")) | |
641 | lsm_label = handler->conf->lsm_se_context; | |
642 | if (lsm_process_label_set(lsm_label, 1, 1) < 0) | |
e075f5d9 | 643 | goto out_warn_father; |
fe4de9a6 | 644 | lsm_proc_unmount(handler->conf); |
e075f5d9 | 645 | |
8f2c3a70 SH |
646 | if (lxc_seccomp_load(handler->conf) != 0) |
647 | goto out_warn_father; | |
648 | ||
283678ed | 649 | if (run_lxc_hooks(handler->name, "start", handler->conf, handler->lxcpath, NULL)) { |
773fb9ca SH |
650 | ERROR("failed to run start hooks for container '%s'.", handler->name); |
651 | goto out_warn_father; | |
652 | } | |
fc25b815 | 653 | |
f7bee6c6 MW |
654 | /* The clearenv() and putenv() calls have been moved here |
655 | * to allow us to use enviroment variables passed to the various | |
656 | * hooks, such as the start hook above. Not all of the | |
657 | * variables like CONFIG_PATH or ROOTFS are valid in this | |
658 | * context but others are. */ | |
659 | if (clearenv()) { | |
660 | SYSERROR("failed to clear environment"); | |
661 | /* don't error out though */ | |
662 | } | |
663 | ||
664 | if (putenv("container=lxc")) { | |
665 | SYSERROR("failed to set environment variable"); | |
c4ea60df | 666 | goto out_warn_father; |
f7bee6c6 MW |
667 | } |
668 | ||
025ed0f3 | 669 | process_lock(); |
773fb9ca | 670 | close(handler->sigfd); |
025ed0f3 | 671 | process_unlock(); |
26ddeedd | 672 | |
e6126dbe MN |
673 | /* after this call, we are in error because this |
674 | * ops should not return as it execs */ | |
c4ea60df | 675 | handler->ops->start(handler, handler->data); |
50e98013 DL |
676 | |
677 | out_warn_father: | |
544a48a0 SH |
678 | /* we want the parent to know something went wrong, so any |
679 | * value other than what it expects is ok. */ | |
3c22086f | 680 | lxc_sync_wake_parent(handler, LXC_SYNC_POST_CONFIGURE); |
50e98013 DL |
681 | return -1; |
682 | } | |
683 | ||
7b35f3d6 SH |
684 | int save_phys_nics(struct lxc_conf *conf) |
685 | { | |
686 | struct lxc_list *iterator; | |
687 | ||
688 | lxc_list_for_each(iterator, &conf->network) { | |
689 | struct lxc_netdev *netdev = iterator->elem; | |
690 | ||
691 | if (netdev->type != LXC_NET_PHYS) | |
692 | continue; | |
693 | conf->saved_nics = realloc(conf->saved_nics, | |
694 | (conf->num_savednics+1)*sizeof(struct saved_nic)); | |
695 | if (!conf->saved_nics) { | |
696 | SYSERROR("failed to allocate memory"); | |
697 | return -1; | |
698 | } | |
699 | conf->saved_nics[conf->num_savednics].ifindex = netdev->ifindex; | |
700 | conf->saved_nics[conf->num_savednics].orig_name = strdup(netdev->link); | |
701 | if (!conf->saved_nics[conf->num_savednics].orig_name) { | |
702 | SYSERROR("failed to allocate memory"); | |
703 | return -1; | |
704 | } | |
705 | INFO("stored saved_nic #%d idx %d name %s\n", conf->num_savednics, | |
706 | conf->saved_nics[conf->num_savednics].ifindex, | |
707 | conf->saved_nics[conf->num_savednics].orig_name); | |
708 | conf->num_savednics++; | |
709 | } | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
23c53af9 | 714 | int lxc_spawn(struct lxc_handler *handler) |
59eb99ba | 715 | { |
b98f7d6e | 716 | int failed_before_rename = 0; |
ffe1e01a | 717 | const char *name = handler->name; |
33ad9f1a CS |
718 | struct cgroup_meta_data *cgroup_meta = NULL; |
719 | const char *cgroup_pattern = NULL; | |
9f30a190 MM |
720 | int saved_ns_fd[LXC_NS_MAX]; |
721 | int preserve_mask = 0, i; | |
722 | ||
723 | for (i = 0; i < LXC_NS_MAX; i++) | |
6c544cb3 | 724 | if (handler->conf->inherit_ns_fd[i] != -1) |
9f30a190 | 725 | preserve_mask |= ns_info[i].clone_flag; |
50e98013 | 726 | |
3c22086f | 727 | if (lxc_sync_init(handler)) |
9d7f9e52 | 728 | return -1; |
0ad19a3f | 729 | |
6c544cb3 | 730 | handler->clone_flags = CLONE_NEWPID|CLONE_NEWNS; |
f6d3e3e4 SH |
731 | if (!lxc_list_empty(&handler->conf->id_map)) { |
732 | INFO("Cloning a new user namespace"); | |
733 | handler->clone_flags |= CLONE_NEWUSER; | |
734 | } | |
0ad19a3f | 735 | |
9f30a190 MM |
736 | if (handler->conf->inherit_ns_fd[LXC_NS_NET] == -1) { |
737 | if (!lxc_list_empty(&handler->conf->network)) { | |
738 | ||
739 | handler->clone_flags |= CLONE_NEWNET; | |
740 | ||
741 | /* Find gateway addresses from the link device, which is | |
742 | * no longer accessible inside the container. Do this | |
743 | * before creating network interfaces, since goto | |
744 | * out_delete_net does not work before lxc_clone. */ | |
745 | if (lxc_find_gateway_addresses(handler)) { | |
746 | ERROR("failed to find gateway addresses"); | |
747 | lxc_sync_fini(handler); | |
748 | return -1; | |
749 | } | |
750 | ||
751 | /* that should be done before the clone because we will | |
752 | * fill the netdev index and use them in the child | |
753 | */ | |
754 | if (lxc_create_network(handler)) { | |
38521a3b | 755 | ERROR("failed to create the network"); |
9f30a190 MM |
756 | lxc_sync_fini(handler); |
757 | return -1; | |
758 | } | |
19a26f82 MK |
759 | } |
760 | ||
9f30a190 MM |
761 | if (save_phys_nics(handler->conf)) { |
762 | ERROR("failed to save physical nic info"); | |
763 | goto out_abort; | |
82d5ae15 | 764 | } |
9f30a190 MM |
765 | } else { |
766 | INFO("Inheriting a net namespace"); | |
82d5ae15 DL |
767 | } |
768 | ||
3c93577b MM |
769 | if (handler->conf->inherit_ns_fd[LXC_NS_IPC] == -1) { |
770 | handler->clone_flags |= CLONE_NEWIPC; | |
771 | } else { | |
772 | INFO("Inheriting an IPC namespace"); | |
7b35f3d6 SH |
773 | } |
774 | ||
6c544cb3 MM |
775 | if (handler->conf->inherit_ns_fd[LXC_NS_UTS] == -1) { |
776 | handler->clone_flags |= CLONE_NEWUTS; | |
777 | } else { | |
778 | INFO("Inheriting a UTS namespace"); | |
779 | } | |
780 | ||
7b35f3d6 | 781 | |
33ad9f1a CS |
782 | cgroup_meta = lxc_cgroup_load_meta(); |
783 | if (!cgroup_meta) { | |
784 | ERROR("failed to detect cgroup metadata"); | |
785 | goto out_delete_net; | |
786 | } | |
787 | ||
788 | /* if we are running as root, use system cgroup pattern, otherwise | |
789 | * just create a cgroup under the current one. But also fall back to | |
790 | * that if for some reason reading the configuration fails and no | |
791 | * default value is available | |
792 | */ | |
793 | if (getuid() == 0) | |
052616eb | 794 | cgroup_pattern = default_cgroup_pattern(); |
33ad9f1a CS |
795 | if (!cgroup_pattern) |
796 | cgroup_pattern = "%n"; | |
797 | ||
47d8fb3b CS |
798 | /* Create cgroup before doing clone(), so the child will know from |
799 | * handler which cgroup it is going to be put in later. | |
800 | */ | |
801 | if ((handler->cgroup = lxc_cgroup_create(name, cgroup_pattern, cgroup_meta, NULL)) == NULL) { | |
802 | ERROR("failed to create cgroups for '%s'", name); | |
803 | goto out_delete_net; | |
804 | } | |
805 | ||
0c547523 SH |
806 | /* |
807 | * if the rootfs is not a blockdev, prevent the container from | |
808 | * marking it readonly. | |
809 | */ | |
810 | ||
2b0e17e4 | 811 | handler->pinfd = pin_rootfs(handler->conf->rootfs.path); |
00ec333b SH |
812 | if (handler->pinfd == -1) |
813 | INFO("failed to pin the container's rootfs"); | |
0c547523 | 814 | |
9f30a190 MM |
815 | preserve_ns(saved_ns_fd, preserve_mask); |
816 | attach_ns(handler->conf->inherit_ns_fd); | |
817 | ||
0ad19a3f | 818 | /* Create a process in a new set of namespaces */ |
d5088cf2 | 819 | handler->pid = lxc_clone(do_start, handler, handler->clone_flags); |
59eb99ba | 820 | if (handler->pid < 0) { |
36eb9bde | 821 | SYSERROR("failed to fork into a new namespace"); |
7fef7a06 | 822 | goto out_delete_net; |
0ad19a3f | 823 | } |
824 | ||
9f30a190 MM |
825 | attach_ns(saved_ns_fd); |
826 | ||
3c22086f CLG |
827 | lxc_sync_fini_child(handler); |
828 | ||
829 | if (lxc_sync_wait_child(handler, LXC_SYNC_CONFIGURE)) | |
99a6af52 | 830 | failed_before_rename = 1; |
0ad19a3f | 831 | |
47d8fb3b CS |
832 | /* In case there is still legacy ns cgroup support in the kernel. |
833 | * Should be removed at some later point in time. | |
834 | */ | |
835 | if (lxc_cgroup_create_legacy(handler->cgroup, name, handler->pid) < 0) { | |
836 | ERROR("failed to create legacy ns cgroups for '%s'", name); | |
ae5c8b8e | 837 | goto out_delete_net; |
33ad9f1a | 838 | } |
e51d4895 | 839 | |
33ad9f1a | 840 | if (lxc_setup_cgroup_without_devices(handler, &handler->conf->cgroup)) { |
6031a6e5 DE |
841 | ERROR("failed to setup the cgroups for '%s'", name); |
842 | goto out_delete_net; | |
843 | } | |
844 | ||
33ad9f1a | 845 | if (lxc_cgroup_enter(handler->cgroup, handler->pid, false) < 0) |
7fef7a06 | 846 | goto out_delete_net; |
218d4250 | 847 | |
99a6af52 MN |
848 | if (failed_before_rename) |
849 | goto out_delete_net; | |
850 | ||
0ad19a3f | 851 | /* Create the network configuration */ |
d5088cf2 | 852 | if (handler->clone_flags & CLONE_NEWNET) { |
fae349da | 853 | if (lxc_assign_network(&handler->conf->network, handler->pid)) { |
82d5ae15 | 854 | ERROR("failed to create the configured network"); |
7fef7a06 | 855 | goto out_delete_net; |
82d5ae15 | 856 | } |
0ad19a3f | 857 | } |
858 | ||
f6d3e3e4 SH |
859 | /* map the container uids - the container became an invalid |
860 | * userid the moment it was cloned with CLONE_NEWUSER - this | |
861 | * call doesn't change anything immediately, but allows the | |
862 | * container to setuid(0) (0 being mapped to something else on | |
863 | * the host) later to become a valid uid again */ | |
864 | if (lxc_map_ids(&handler->conf->id_map, handler->pid)) { | |
865 | ERROR("failed to set up id mapping"); | |
866 | goto out_delete_net; | |
867 | } | |
868 | ||
544a48a0 SH |
869 | /* Tell the child to continue its initialization. we'll get |
870 | * LXC_SYNC_CGROUP when it is ready for us to setup cgroups | |
3c22086f CLG |
871 | */ |
872 | if (lxc_sync_barrier_child(handler, LXC_SYNC_POST_CONFIGURE)) | |
544a48a0 SH |
873 | goto out_delete_net; |
874 | ||
33ad9f1a | 875 | if (lxc_setup_cgroup_devices(handler, &handler->conf->cgroup)) { |
b98f7d6e SH |
876 | ERROR("failed to setup the devices cgroup for '%s'", name); |
877 | goto out_delete_net; | |
544a48a0 SH |
878 | } |
879 | ||
544a48a0 SH |
880 | /* Tell the child to complete its initialization and wait for |
881 | * it to exec or return an error. (the child will never | |
882 | * return LXC_SYNC_POST_CGROUP+1. It will either close the | |
883 | * sync pipe, causing lxc_sync_barrier_child to return | |
884 | * success, or return a different value, causing us to error | |
885 | * out). | |
886 | */ | |
887 | if (lxc_sync_barrier_child(handler, LXC_SYNC_POST_CGROUP)) | |
3c22086f | 888 | return -1; |
0ad19a3f | 889 | |
cc28d0b0 SH |
890 | if (detect_shared_rootfs()) |
891 | umount2(handler->conf->rootfs.mount, MNT_DETACH); | |
892 | ||
23c53af9 | 893 | if (handler->ops->post_start(handler, handler->data)) |
e6126dbe MN |
894 | goto out_abort; |
895 | ||
25c2aca5 | 896 | if (lxc_set_state(name, handler, RUNNING)) { |
59eb99ba DL |
897 | ERROR("failed to set state to %s", |
898 | lxc_state2str(RUNNING)); | |
899 | goto out_abort; | |
3f21c114 | 900 | } |
22ebac19 | 901 | |
33ad9f1a | 902 | lxc_cgroup_put_meta(cgroup_meta); |
3c22086f | 903 | lxc_sync_fini(handler); |
0c547523 | 904 | |
e6126dbe | 905 | return 0; |
1ac470c0 | 906 | |
7fef7a06 | 907 | out_delete_net: |
d5088cf2 | 908 | if (handler->clone_flags & CLONE_NEWNET) |
74a2b586 | 909 | lxc_delete_network(handler); |
59eb99ba | 910 | out_abort: |
33ad9f1a | 911 | lxc_cgroup_put_meta(cgroup_meta); |
59eb99ba | 912 | lxc_abort(name, handler); |
3c22086f | 913 | lxc_sync_fini(handler); |
5c068da9 | 914 | if (handler->pinfd >= 0) { |
025ed0f3 | 915 | process_lock(); |
5c068da9 | 916 | close(handler->pinfd); |
025ed0f3 | 917 | process_unlock(); |
5c068da9 SH |
918 | handler->pinfd = -1; |
919 | } | |
920 | ||
b79fcd86 | 921 | return -1; |
59eb99ba | 922 | } |
0ad19a3f | 923 | |
ee70bf78 | 924 | int __lxc_start(const char *name, struct lxc_conf *conf, |
13f5be62 | 925 | struct lxc_operations* ops, void *data, const char *lxcpath) |
59eb99ba | 926 | { |
3a0f472d | 927 | struct lxc_handler *handler; |
e043236e | 928 | int err = -1; |
59eb99ba | 929 | int status; |
80090207 | 930 | |
13f5be62 | 931 | handler = lxc_init(name, conf, lxcpath); |
3a0f472d | 932 | if (!handler) { |
59eb99ba | 933 | ERROR("failed to initialize the container"); |
66aeffc7 | 934 | return -1; |
0ad19a3f | 935 | } |
ee70bf78 CLG |
936 | handler->ops = ops; |
937 | handler->data = data; | |
e6126dbe | 938 | |
b60ed720 | 939 | if (must_drop_cap_sys_boot(handler->conf)) { |
495d2046 | 940 | #if HAVE_SYS_CAPABILITY_H |
f51db2b3 | 941 | DEBUG("Dropping cap_sys_boot\n"); |
495d2046 SG |
942 | #else |
943 | DEBUG("Can't drop cap_sys_boot as capabilities aren't supported\n"); | |
944 | #endif | |
69182a31 SH |
945 | } else { |
946 | DEBUG("Not dropping cap_sys_boot or watching utmp\n"); | |
947 | handler->conf->need_utmp_watch = 0; | |
948 | } | |
949 | ||
23c53af9 | 950 | err = lxc_spawn(handler); |
59eb99ba | 951 | if (err) { |
ee70bf78 | 952 | ERROR("failed to spawn '%s'", name); |
74a2b586 | 953 | goto out_fini_nonet; |
0ad19a3f | 954 | } |
955 | ||
3a0f472d | 956 | err = lxc_poll(name, handler); |
e043236e | 957 | if (err) { |
59eb99ba DL |
958 | ERROR("mainloop exited with an error"); |
959 | goto out_abort; | |
960 | } | |
0ad19a3f | 961 | |
3a0f472d | 962 | while (waitpid(handler->pid, &status, 0) < 0 && errno == EINTR) |
1bc5cc8c | 963 | continue; |
e043236e | 964 | |
8b004f07 SH |
965 | /* |
966 | * If the child process exited but was not signaled, | |
967 | * it didn't call reboot. This should mean it was an | |
968 | * lxc-execute which simply exited. In any case, treat | |
969 | * it as a 'halt' | |
970 | */ | |
971 | if (WIFSIGNALED(status)) { | |
972 | switch(WTERMSIG(status)) { | |
973 | case SIGINT: /* halt */ | |
974 | DEBUG("Container halting"); | |
975 | break; | |
976 | case SIGHUP: /* reboot */ | |
977 | DEBUG("Container rebooting"); | |
978 | handler->conf->reboot = 1; | |
979 | break; | |
980 | default: | |
981 | DEBUG("unknown exit status for init: %d\n", WTERMSIG(status)); | |
982 | break; | |
983 | } | |
828695d9 SH |
984 | } |
985 | ||
7b35f3d6 SH |
986 | lxc_rename_phys_nics_on_shutdown(handler->conf); |
987 | ||
5c068da9 | 988 | if (handler->pinfd >= 0) { |
025ed0f3 | 989 | process_lock(); |
5c068da9 | 990 | close(handler->pinfd); |
025ed0f3 | 991 | process_unlock(); |
5c068da9 SH |
992 | handler->pinfd = -1; |
993 | } | |
994 | ||
3a0f472d | 995 | err = lxc_error_set_and_log(handler->pid, status); |
9d7f9e52 | 996 | out_fini: |
74a2b586 JK |
997 | lxc_delete_network(handler); |
998 | ||
999 | out_fini_nonet: | |
3a0f472d | 1000 | lxc_fini(name, handler); |
0ad19a3f | 1001 | return err; |
1002 | ||
59eb99ba | 1003 | out_abort: |
3a0f472d | 1004 | lxc_abort(name, handler); |
9d7f9e52 | 1005 | goto out_fini; |
0ad19a3f | 1006 | } |
ee70bf78 CLG |
1007 | |
1008 | struct start_args { | |
1009 | char *const *argv; | |
1010 | }; | |
1011 | ||
1012 | static int start(struct lxc_handler *handler, void* data) | |
1013 | { | |
1014 | struct start_args *arg = data; | |
1015 | ||
1016 | NOTICE("exec'ing '%s'", arg->argv[0]); | |
1017 | ||
1018 | execvp(arg->argv[0], arg->argv); | |
1019 | SYSERROR("failed to exec %s", arg->argv[0]); | |
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | static int post_start(struct lxc_handler *handler, void* data) | |
1024 | { | |
1025 | struct start_args *arg = data; | |
1026 | ||
1027 | NOTICE("'%s' started with pid '%d'", arg->argv[0], handler->pid); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | static struct lxc_operations start_ops = { | |
1032 | .start = start, | |
1033 | .post_start = post_start | |
1034 | }; | |
1035 | ||
13f5be62 SH |
1036 | int lxc_start(const char *name, char *const argv[], struct lxc_conf *conf, |
1037 | const char *lxcpath) | |
ee70bf78 CLG |
1038 | { |
1039 | struct start_args start_arg = { | |
1040 | .argv = argv, | |
1041 | }; | |
1042 | ||
b119f362 | 1043 | if (lxc_check_inherited(conf, -1)) |
ee70bf78 CLG |
1044 | return -1; |
1045 | ||
828695d9 | 1046 | conf->need_utmp_watch = 1; |
13f5be62 | 1047 | return __lxc_start(name, conf, &start_ops, &start_arg, lxcpath); |
ee70bf78 | 1048 | } |