]>
Commit | Line | Data |
---|---|---|
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> |
0ad19a3f | 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> | |
c476bdce | 35 | #include <grp.h> |
37515ebd | 36 | #include <poll.h> |
0ad19a3f | 37 | #include <sys/param.h> |
38 | #include <sys/file.h> | |
f4d507d5 | 39 | #include <sys/mount.h> |
b4f8660e | 40 | #include <sys/stat.h> |
0ad19a3f | 41 | #include <sys/types.h> |
8173e600 | 42 | #include <sys/socket.h> |
0ad19a3f | 43 | #include <sys/prctl.h> |
ddceb1f9 | 44 | #include <sys/types.h> |
0ad19a3f | 45 | #include <sys/wait.h> |
b0a33c1e | 46 | #include <sys/un.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" |
fe4de9a6 | 73 | #include "lsm/lsm.h" |
36eb9bde CLG |
74 | |
75 | lxc_log_define(lxc_start, lxc); | |
76 | ||
9f30a190 MM |
77 | const struct ns_info ns_info[LXC_NS_MAX] = { |
78 | [LXC_NS_MNT] = {"mnt", CLONE_NEWNS}, | |
79 | [LXC_NS_PID] = {"pid", CLONE_NEWPID}, | |
80 | [LXC_NS_UTS] = {"uts", CLONE_NEWUTS}, | |
81 | [LXC_NS_IPC] = {"ipc", CLONE_NEWIPC}, | |
82 | [LXC_NS_USER] = {"user", CLONE_NEWUSER}, | |
83 | [LXC_NS_NET] = {"net", CLONE_NEWNET} | |
84 | }; | |
85 | ||
c8154066 SH |
86 | static void print_top_failing_dir(const char *path) |
87 | { | |
88 | size_t len = strlen(path); | |
89 | char *copy = alloca(len+1), *p, *e, saved; | |
90 | strcpy(copy, path); | |
91 | ||
92 | p = copy; | |
93 | e = copy + len; | |
94 | while (p < e) { | |
95 | while (p < e && *p == '/') p++; | |
96 | while (p < e && *p != '/') p++; | |
97 | if (p >= e) | |
98 | return; | |
99 | saved = *p; | |
100 | *p = '\0'; | |
101 | if (access(copy, X_OK)) { | |
102 | SYSERROR("could not access %s. Please grant it 'x' " \ | |
103 | "access, or add an ACL for the container root.", | |
104 | copy); | |
105 | return; | |
106 | } | |
107 | *p = saved; | |
108 | } | |
109 | } | |
110 | ||
9f30a190 MM |
111 | static void close_ns(int ns_fd[LXC_NS_MAX]) { |
112 | int i; | |
113 | ||
9f30a190 MM |
114 | for (i = 0; i < LXC_NS_MAX; i++) { |
115 | if (ns_fd[i] > -1) { | |
116 | close(ns_fd[i]); | |
117 | ns_fd[i] = -1; | |
118 | } | |
119 | } | |
9f30a190 MM |
120 | } |
121 | ||
122 | static int preserve_ns(int ns_fd[LXC_NS_MAX], int clone_flags) { | |
123 | int i, saved_errno; | |
124 | char path[MAXPATHLEN]; | |
125 | ||
9f30a190 MM |
126 | for (i = 0; i < LXC_NS_MAX; i++) |
127 | ns_fd[i] = -1; | |
128 | ||
cd43d2d1 SH |
129 | if (access("/proc/self/ns", X_OK)) { |
130 | WARN("Kernel does not support attach; preserve_ns ignored"); | |
131 | return 0; | |
132 | } | |
133 | ||
9f30a190 MM |
134 | for (i = 0; i < LXC_NS_MAX; i++) { |
135 | if ((clone_flags & ns_info[i].clone_flag) == 0) | |
136 | continue; | |
137 | snprintf(path, MAXPATHLEN, "/proc/self/ns/%s", ns_info[i].proc_name); | |
9f30a190 | 138 | ns_fd[i] = open(path, O_RDONLY | O_CLOEXEC); |
9f30a190 MM |
139 | if (ns_fd[i] < 0) |
140 | goto error; | |
141 | } | |
142 | ||
143 | return 0; | |
144 | ||
145 | error: | |
146 | saved_errno = errno; | |
147 | close_ns(ns_fd); | |
148 | errno = saved_errno; | |
149 | SYSERROR("failed to open '%s'", path); | |
150 | return -1; | |
151 | } | |
152 | ||
153 | static int attach_ns(const int ns_fd[LXC_NS_MAX]) { | |
154 | int i; | |
155 | ||
156 | for (i = 0; i < LXC_NS_MAX; i++) { | |
157 | if (ns_fd[i] < 0) | |
158 | continue; | |
159 | ||
160 | if (setns(ns_fd[i], 0) != 0) | |
161 | goto error; | |
162 | } | |
163 | return 0; | |
164 | ||
165 | error: | |
166 | SYSERROR("failed to set namespace '%s'", ns_info[i].proc_name); | |
167 | return -1; | |
168 | } | |
169 | ||
80090207 CLG |
170 | static int match_fd(int fd) |
171 | { | |
172 | return (fd == 0 || fd == 1 || fd == 2); | |
173 | } | |
174 | ||
b119f362 | 175 | int lxc_check_inherited(struct lxc_conf *conf, int fd_to_ignore) |
80090207 CLG |
176 | { |
177 | struct dirent dirent, *direntp; | |
178 | int fd, fddir; | |
179 | DIR *dir; | |
80090207 | 180 | |
b119f362 | 181 | restart: |
80090207 CLG |
182 | dir = opendir("/proc/self/fd"); |
183 | if (!dir) { | |
184 | WARN("failed to open directory: %m"); | |
185 | return -1; | |
186 | } | |
187 | ||
188 | fddir = dirfd(dir); | |
189 | ||
190 | while (!readdir_r(dir, &dirent, &direntp)) { | |
80090207 CLG |
191 | if (!direntp) |
192 | break; | |
193 | ||
194 | if (!strcmp(direntp->d_name, ".")) | |
195 | continue; | |
196 | ||
197 | if (!strcmp(direntp->d_name, "..")) | |
198 | continue; | |
199 | ||
200 | fd = atoi(direntp->d_name); | |
201 | ||
f2faa8fa | 202 | if (fd == fddir || fd == lxc_log_fd || fd == fd_to_ignore) |
80090207 CLG |
203 | continue; |
204 | ||
205 | if (match_fd(fd)) | |
206 | continue; | |
80090207 | 207 | |
b119f362 SH |
208 | if (conf->close_all_fds) { |
209 | close(fd); | |
210 | closedir(dir); | |
211 | INFO("closed inherited fd %d", fd); | |
212 | goto restart; | |
213 | } | |
92c7f629 | 214 | WARN("inherited fd %d", fd); |
80090207 CLG |
215 | } |
216 | ||
92c7f629 GK |
217 | closedir(dir); /* cannot fail */ |
218 | return 0; | |
80090207 CLG |
219 | } |
220 | ||
83ee7875 | 221 | static int setup_signal_fd(sigset_t *oldmask) |
b0a33c1e | 222 | { |
223 | sigset_t mask; | |
224 | int fd; | |
225 | ||
f3304a29 FW |
226 | /* Block everything except serious error signals */ |
227 | if (sigfillset(&mask) || | |
228 | sigdelset(&mask, SIGILL) || | |
229 | sigdelset(&mask, SIGSEGV) || | |
230 | sigdelset(&mask, SIGBUS) || | |
b5159817 | 231 | sigdelset(&mask, SIGWINCH) || |
f3304a29 FW |
232 | sigprocmask(SIG_BLOCK, &mask, oldmask)) { |
233 | SYSERROR("failed to set signal mask"); | |
b0a33c1e | 234 | return -1; |
235 | } | |
236 | ||
237 | fd = signalfd(-1, &mask, 0); | |
238 | if (fd < 0) { | |
36eb9bde | 239 | SYSERROR("failed to create the signal fd"); |
b0a33c1e | 240 | return -1; |
241 | } | |
242 | ||
243 | if (fcntl(fd, F_SETFD, FD_CLOEXEC)) { | |
36eb9bde | 244 | SYSERROR("failed to set sigfd to close-on-exec"); |
b0a33c1e | 245 | close(fd); |
246 | return -1; | |
247 | } | |
248 | ||
1ac470c0 DL |
249 | DEBUG("sigchild handler set"); |
250 | ||
b0a33c1e | 251 | return fd; |
252 | } | |
253 | ||
84c92abd | 254 | static int signal_handler(int fd, uint32_t events, void *data, |
b0a33c1e | 255 | struct lxc_epoll_descr *descr) |
256 | { | |
15cd25fd | 257 | struct signalfd_siginfo siginfo; |
80507ee8 | 258 | siginfo_t info; |
15cd25fd | 259 | int ret; |
82d89dce | 260 | pid_t *pid = data; |
80507ee8 | 261 | bool init_died = false; |
15cd25fd DL |
262 | |
263 | ret = read(fd, &siginfo, sizeof(siginfo)); | |
264 | if (ret < 0) { | |
f3304a29 | 265 | ERROR("failed to read signal info"); |
15cd25fd DL |
266 | return -1; |
267 | } | |
268 | ||
269 | if (ret != sizeof(siginfo)) { | |
270 | ERROR("unexpected siginfo size"); | |
271 | return -1; | |
272 | } | |
273 | ||
80507ee8 SH |
274 | // check whether init is running |
275 | info.si_pid = 0; | |
276 | ret = waitid(P_PID, *pid, &info, WEXITED | WNOWAIT | WNOHANG); | |
277 | if (ret == 0 && info.si_pid == *pid) { | |
278 | init_died = true; | |
279 | } | |
280 | ||
f3304a29 FW |
281 | if (siginfo.ssi_signo != SIGCHLD) { |
282 | kill(*pid, siginfo.ssi_signo); | |
283 | INFO("forwarded signal %d to pid %d", siginfo.ssi_signo, *pid); | |
80507ee8 | 284 | return init_died ? 1 : 0; |
f3304a29 FW |
285 | } |
286 | ||
15cd25fd DL |
287 | if (siginfo.ssi_code == CLD_STOPPED || |
288 | siginfo.ssi_code == CLD_CONTINUED) { | |
289 | INFO("container init process was stopped/continued"); | |
80507ee8 | 290 | return init_died ? 1 : 0; |
15cd25fd | 291 | } |
1ac470c0 | 292 | |
82d89dce DL |
293 | /* more robustness, protect ourself from a SIGCHLD sent |
294 | * by a process different from the container init | |
295 | */ | |
296 | if (siginfo.ssi_pid != *pid) { | |
297 | WARN("invalid pid for SIGCHLD"); | |
80507ee8 | 298 | return init_died ? 1 : 0; |
82d89dce DL |
299 | } |
300 | ||
15cd25fd | 301 | DEBUG("container init process exited"); |
b0a33c1e | 302 | return 1; |
303 | } | |
304 | ||
74a3920a | 305 | static int lxc_set_state(const char *name, struct lxc_handler *handler, lxc_state_t state) |
66aeffc7 DL |
306 | { |
307 | handler->state = state; | |
9123e471 | 308 | lxc_monitor_send_state(name, state, handler->lxcpath); |
66aeffc7 DL |
309 | return 0; |
310 | } | |
311 | ||
74a3920a | 312 | static int lxc_poll(const char *name, struct lxc_handler *handler) |
b0a33c1e | 313 | { |
ca5f7926 DL |
314 | int sigfd = handler->sigfd; |
315 | int pid = handler->pid; | |
b0a33c1e | 316 | struct lxc_epoll_descr descr; |
317 | ||
a9e61274 | 318 | if (lxc_mainloop_open(&descr)) { |
36eb9bde | 319 | ERROR("failed to create mainloop"); |
50c8bf05 | 320 | goto out_sigfd; |
b0a33c1e | 321 | } |
322 | ||
83ee7875 | 323 | if (lxc_mainloop_add_handler(&descr, sigfd, signal_handler, &pid)) { |
36eb9bde | 324 | ERROR("failed to add handler for the signal"); |
b0a33c1e | 325 | goto out_mainloop_open; |
326 | } | |
327 | ||
63376d7d DL |
328 | if (lxc_console_mainloop_add(&descr, handler)) { |
329 | ERROR("failed to add console handler to mainloop"); | |
330 | goto out_mainloop_open; | |
331 | } | |
332 | ||
ef6e34ee | 333 | if (lxc_cmd_mainloop_add(name, &descr, handler)) { |
563f2f2c | 334 | ERROR("failed to add command handler to mainloop"); |
96fa1ff0 | 335 | goto out_mainloop_open; |
563f2f2c DL |
336 | } |
337 | ||
828695d9 | 338 | if (handler->conf->need_utmp_watch) { |
495d2046 | 339 | #if HAVE_SYS_CAPABILITY_H |
828695d9 SH |
340 | if (lxc_utmp_mainloop_add(&descr, handler)) { |
341 | ERROR("failed to add utmp handler to mainloop"); | |
342 | goto out_mainloop_open; | |
343 | } | |
495d2046 | 344 | #else |
959aee9c | 345 | DEBUG("not starting utmp handler as cap_sys_boot cannot be dropped without capabilities support"); |
495d2046 | 346 | #endif |
563f2f2c | 347 | } |
b0a33c1e | 348 | |
e51d4895 | 349 | return lxc_mainloop(&descr, -1); |
b0a33c1e | 350 | |
351 | out_mainloop_open: | |
352 | lxc_mainloop_close(&descr); | |
b0a33c1e | 353 | out_sigfd: |
354 | close(sigfd); | |
c3e13372 | 355 | return -1; |
b0a33c1e | 356 | } |
357 | ||
13f5be62 | 358 | struct lxc_handler *lxc_init(const char *name, struct lxc_conf *conf, const char *lxcpath) |
59eb99ba | 359 | { |
3a0f472d DL |
360 | struct lxc_handler *handler; |
361 | ||
362 | handler = malloc(sizeof(*handler)); | |
363 | if (!handler) | |
364 | return NULL; | |
59eb99ba DL |
365 | |
366 | memset(handler, 0, sizeof(*handler)); | |
367 | ||
fae349da | 368 | handler->conf = conf; |
9123e471 | 369 | handler->lxcpath = lxcpath; |
5c068da9 | 370 | handler->pinfd = -1; |
fae349da | 371 | |
fe4de9a6 DE |
372 | lsm_init(); |
373 | ||
3bdf52d7 DL |
374 | handler->name = strdup(name); |
375 | if (!handler->name) { | |
376 | ERROR("failed to allocate memory"); | |
377 | goto out_free; | |
378 | } | |
379 | ||
ef6e34ee | 380 | if (lxc_cmd_init(name, handler, lxcpath)) |
d2e30e99 DE |
381 | goto out_free_name; |
382 | ||
8f2c3a70 SH |
383 | if (lxc_read_seccomp_config(conf) != 0) { |
384 | ERROR("failed loading seccomp policy"); | |
d2e30e99 | 385 | goto out_close_maincmd_fd; |
8f2c3a70 SH |
386 | } |
387 | ||
051151de | 388 | /* Begin by setting the state to STARTING */ |
25c2aca5 | 389 | if (lxc_set_state(name, handler, STARTING)) { |
59eb99ba | 390 | ERROR("failed to set state '%s'", lxc_state2str(STARTING)); |
051151de | 391 | goto out_close_maincmd_fd; |
0ad19a3f | 392 | } |
393 | ||
f7bee6c6 MW |
394 | /* Start of environment variable setup for hooks */ |
395 | if (setenv("LXC_NAME", name, 1)) { | |
396 | SYSERROR("failed to set environment variable for container name"); | |
397 | } | |
398 | if (setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) { | |
399 | SYSERROR("failed to set environment variable for config path"); | |
400 | } | |
401 | if (setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) { | |
402 | SYSERROR("failed to set environment variable for rootfs mount"); | |
403 | } | |
404 | if (setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) { | |
405 | SYSERROR("failed to set environment variable for rootfs mount"); | |
406 | } | |
407 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) { | |
408 | SYSERROR("failed to set environment variable for console path"); | |
409 | } | |
410 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) { | |
411 | SYSERROR("failed to set environment variable for console log"); | |
412 | } | |
413 | /* End of environment variable setup for hooks */ | |
414 | ||
283678ed | 415 | if (run_lxc_hooks(name, "pre-start", conf, handler->lxcpath, NULL)) { |
773fb9ca SH |
416 | ERROR("failed to run pre-start hooks for container '%s'.", name); |
417 | goto out_aborting; | |
418 | } | |
26ddeedd | 419 | |
fae349da | 420 | if (lxc_create_tty(name, conf)) { |
36eb9bde | 421 | ERROR("failed to create the ttys"); |
59eb99ba | 422 | goto out_aborting; |
b0a33c1e | 423 | } |
424 | ||
425 | /* the signal fd has to be created before forking otherwise | |
426 | * if the child process exits before we setup the signal fd, | |
427 | * the event will be lost and the command will be stuck */ | |
83ee7875 | 428 | handler->sigfd = setup_signal_fd(&handler->oldmask); |
59eb99ba | 429 | if (handler->sigfd < 0) { |
36eb9bde | 430 | ERROR("failed to set sigchild fd handler"); |
b5159817 DE |
431 | goto out_delete_tty; |
432 | } | |
433 | ||
434 | /* do this after setting up signals since it might unblock SIGWINCH */ | |
435 | if (lxc_console_create(conf)) { | |
436 | ERROR("failed to create console"); | |
437 | goto out_restore_sigmask; | |
b0a33c1e | 438 | } |
439 | ||
c4d10a05 SH |
440 | if (ttys_shift_ids(conf) < 0) { |
441 | ERROR("Failed to shift tty into container"); | |
442 | goto out_restore_sigmask; | |
443 | } | |
444 | ||
c3e13372 | 445 | INFO("'%s' is initialized", name); |
3a0f472d | 446 | return handler; |
59eb99ba | 447 | |
b5159817 DE |
448 | out_restore_sigmask: |
449 | sigprocmask(SIG_SETMASK, &handler->oldmask, NULL); | |
59eb99ba | 450 | out_delete_tty: |
fae349da | 451 | lxc_delete_tty(&conf->tty_info); |
59eb99ba | 452 | out_aborting: |
25c2aca5 | 453 | lxc_set_state(name, handler, ABORTING); |
d2e30e99 DE |
454 | out_close_maincmd_fd: |
455 | close(conf->maincmd_fd); | |
456 | conf->maincmd_fd = -1; | |
3bdf52d7 DL |
457 | out_free_name: |
458 | free(handler->name); | |
459 | handler->name = NULL; | |
3a0f472d DL |
460 | out_free: |
461 | free(handler); | |
c3e13372 | 462 | return NULL; |
59eb99ba DL |
463 | } |
464 | ||
ae5c8b8e | 465 | static void lxc_fini(const char *name, struct lxc_handler *handler) |
59eb99ba DL |
466 | { |
467 | /* The STOPPING state is there for future cleanup code | |
468 | * which can take awhile | |
469 | */ | |
25c2aca5 MN |
470 | lxc_set_state(name, handler, STOPPING); |
471 | lxc_set_state(name, handler, STOPPED); | |
59eb99ba | 472 | |
283678ed | 473 | if (run_lxc_hooks(name, "post-stop", handler->conf, handler->lxcpath, NULL)) |
773fb9ca | 474 | ERROR("failed to run post-stop hooks for container '%s'.", name); |
26ddeedd | 475 | |
83ee7875 | 476 | /* reset mask set by setup_signal_fd */ |
8f64a3f6 MN |
477 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) |
478 | WARN("failed to restore sigprocmask"); | |
479 | ||
b5159817 | 480 | lxc_console_delete(&handler->conf->console); |
b2431939 | 481 | lxc_delete_tty(&handler->conf->tty_info); |
d2e30e99 DE |
482 | close(handler->conf->maincmd_fd); |
483 | handler->conf->maincmd_fd = -1; | |
3bdf52d7 | 484 | free(handler->name); |
d4ef7c50 | 485 | cgroup_destroy(handler); |
b2431939 | 486 | free(handler); |
59eb99ba DL |
487 | } |
488 | ||
74a3920a | 489 | static void lxc_abort(const char *name, struct lxc_handler *handler) |
59eb99ba | 490 | { |
73e608b2 SH |
491 | int ret, status; |
492 | ||
25c2aca5 | 493 | lxc_set_state(name, handler, ABORTING); |
7d9fb3e9 DL |
494 | if (handler->pid > 0) |
495 | kill(handler->pid, SIGKILL); | |
73e608b2 | 496 | while ((ret = waitpid(-1, &status, 0)) > 0) ; |
59eb99ba DL |
497 | } |
498 | ||
828695d9 SH |
499 | #include <sys/reboot.h> |
500 | #include <linux/reboot.h> | |
501 | ||
e2fa1520 SH |
502 | /* |
503 | * reboot(LINUX_REBOOT_CMD_CAD_ON) will return -EINVAL | |
504 | * in a child pid namespace if container reboot support exists. | |
505 | * Otherwise, it will either succeed or return -EPERM. | |
506 | */ | |
507 | static int container_reboot_supported(void *arg) | |
828695d9 | 508 | { |
e2fa1520 | 509 | int *cmd = arg; |
828695d9 | 510 | int ret; |
828695d9 | 511 | |
e2fa1520 SH |
512 | ret = reboot(*cmd); |
513 | if (ret == -1 && errno == EINVAL) | |
514 | return 1; | |
515 | return 0; | |
516 | } | |
517 | ||
b60ed720 | 518 | static int must_drop_cap_sys_boot(struct lxc_conf *conf) |
e2fa1520 | 519 | { |
025ed0f3 | 520 | FILE *f; |
b60ed720 | 521 | int ret, cmd, v, flags; |
e2fa1520 | 522 | long stack_size = 4096; |
7f145a6d | 523 | void *stack = alloca(stack_size); |
e2fa1520 SH |
524 | int status; |
525 | pid_t pid; | |
526 | ||
025ed0f3 | 527 | f = fopen("/proc/sys/kernel/ctrl-alt-del", "r"); |
e2fa1520 SH |
528 | if (!f) { |
529 | DEBUG("failed to open /proc/sys/kernel/ctrl-alt-del"); | |
828695d9 | 530 | return 1; |
e2fa1520 | 531 | } |
828695d9 SH |
532 | |
533 | ret = fscanf(f, "%d", &v); | |
534 | fclose(f); | |
e2fa1520 SH |
535 | if (ret != 1) { |
536 | DEBUG("Failed to read /proc/sys/kernel/ctrl-alt-del"); | |
828695d9 | 537 | return 1; |
e2fa1520 SH |
538 | } |
539 | cmd = v ? LINUX_REBOOT_CMD_CAD_ON : LINUX_REBOOT_CMD_CAD_OFF; | |
540 | ||
b60ed720 SH |
541 | flags = CLONE_NEWPID | SIGCHLD; |
542 | if (!lxc_list_empty(&conf->id_map)) | |
543 | flags |= CLONE_NEWUSER; | |
544 | ||
7f145a6d | 545 | #ifdef __ia64__ |
959aee9c | 546 | pid = __clone2(container_reboot_supported, stack, stack_size, flags, &cmd); |
7f145a6d | 547 | #else |
959aee9c SG |
548 | stack += stack_size; |
549 | pid = clone(container_reboot_supported, stack, flags, &cmd); | |
7f145a6d | 550 | #endif |
959aee9c SG |
551 | if (pid < 0) { |
552 | SYSERROR("failed to clone"); | |
553 | return -1; | |
554 | } | |
555 | if (wait(&status) < 0) { | |
556 | SYSERROR("unexpected wait error: %m"); | |
557 | return -1; | |
558 | } | |
e2fa1520 SH |
559 | |
560 | if (WEXITSTATUS(status) != 1) | |
828695d9 | 561 | return 1; |
e2fa1520 | 562 | |
828695d9 SH |
563 | return 0; |
564 | } | |
565 | ||
ffe1e01a | 566 | static int do_start(void *data) |
50e98013 | 567 | { |
23c53af9 | 568 | struct lxc_handler *handler = data; |
e0b6898a | 569 | const char *lsm_label = NULL; |
50e98013 DL |
570 | |
571 | if (sigprocmask(SIG_SETMASK, &handler->oldmask, NULL)) { | |
572 | SYSERROR("failed to set sigprocmask"); | |
9d7f9e52 | 573 | return -1; |
50e98013 DL |
574 | } |
575 | ||
743ecd2e DL |
576 | /* This prctl must be before the synchro, so if the parent |
577 | * dies before we set the parent death signal, we will detect | |
578 | * its death with the synchro right after, otherwise we have | |
579 | * a window where the parent can exit before we set the pdeath | |
580 | * signal leading to a unsupervized container. | |
581 | */ | |
582 | if (prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0)) { | |
583 | SYSERROR("failed to set pdeath signal"); | |
584 | return -1; | |
585 | } | |
586 | ||
3c22086f | 587 | lxc_sync_fini_parent(handler); |
50e98013 | 588 | |
2b0e17e4 | 589 | /* don't leak the pinfd to the container */ |
025ed0f3 | 590 | if (handler->pinfd >= 0) { |
0d03360a | 591 | close(handler->pinfd); |
025ed0f3 | 592 | } |
2b0e17e4 | 593 | |
3c22086f CLG |
594 | /* Tell the parent task it can begin to configure the |
595 | * container and wait for it to finish | |
596 | */ | |
597 | if (lxc_sync_barrier_parent(handler, LXC_SYNC_CONFIGURE)) | |
9d7f9e52 | 598 | return -1; |
50e98013 | 599 | |
f6d3e3e4 SH |
600 | /* |
601 | * if we are in a new user namespace, become root there to have | |
602 | * privilege over our namespace | |
603 | */ | |
604 | if (!lxc_list_empty(&handler->conf->id_map)) { | |
605 | NOTICE("switching to gid/uid 0 in new user namespace"); | |
606 | if (setgid(0)) { | |
607 | SYSERROR("setgid"); | |
608 | goto out_warn_father; | |
609 | } | |
610 | if (setuid(0)) { | |
611 | SYSERROR("setuid"); | |
612 | goto out_warn_father; | |
613 | } | |
c476bdce SH |
614 | if (setgroups(0, NULL)) { |
615 | SYSERROR("setgroups"); | |
616 | goto out_warn_father; | |
617 | } | |
f6d3e3e4 SH |
618 | } |
619 | ||
c8154066 SH |
620 | if (access(handler->lxcpath, R_OK)) { |
621 | print_top_failing_dir(handler->lxcpath); | |
622 | goto out_warn_father; | |
623 | } | |
624 | ||
495d2046 | 625 | #if HAVE_SYS_CAPABILITY_H |
69182a31 | 626 | if (handler->conf->need_utmp_watch) { |
828695d9 SH |
627 | if (prctl(PR_CAPBSET_DROP, CAP_SYS_BOOT, 0, 0, 0)) { |
628 | SYSERROR("failed to remove CAP_SYS_BOOT capability"); | |
c4ea60df | 629 | goto out_warn_father; |
828695d9 | 630 | } |
959aee9c | 631 | DEBUG("Dropped cap_sys_boot"); |
e2fa1520 | 632 | } |
495d2046 | 633 | #endif |
e2fa1520 SH |
634 | |
635 | /* Setup the container, ip, names, utsname, ... */ | |
d4ef7c50 | 636 | if (lxc_setup(handler)) { |
e2fa1520 SH |
637 | ERROR("failed to setup the container"); |
638 | goto out_warn_father; | |
639 | } | |
50e98013 | 640 | |
544a48a0 SH |
641 | /* ask father to setup cgroups and wait for him to finish */ |
642 | if (lxc_sync_barrier_parent(handler, LXC_SYNC_CGROUP)) | |
643 | return -1; | |
644 | ||
72863294 | 645 | /* Set the label to change to when we exec(2) the container's init */ |
e0b6898a DE |
646 | if (!strcmp(lsm_name(), "AppArmor")) |
647 | lsm_label = handler->conf->lsm_aa_profile; | |
648 | else if (!strcmp(lsm_name(), "SELinux")) | |
649 | lsm_label = handler->conf->lsm_se_context; | |
650 | if (lsm_process_label_set(lsm_label, 1, 1) < 0) | |
e075f5d9 | 651 | goto out_warn_father; |
5112cd70 SH |
652 | |
653 | /* If we mounted a temporary proc, then unmount it now */ | |
654 | tmp_proc_unmount(handler->conf); | |
e075f5d9 | 655 | |
8f2c3a70 SH |
656 | if (lxc_seccomp_load(handler->conf) != 0) |
657 | goto out_warn_father; | |
658 | ||
283678ed | 659 | if (run_lxc_hooks(handler->name, "start", handler->conf, handler->lxcpath, NULL)) { |
773fb9ca SH |
660 | ERROR("failed to run start hooks for container '%s'.", handler->name); |
661 | goto out_warn_father; | |
662 | } | |
fc25b815 | 663 | |
f7bee6c6 MW |
664 | /* The clearenv() and putenv() calls have been moved here |
665 | * to allow us to use enviroment variables passed to the various | |
666 | * hooks, such as the start hook above. Not all of the | |
667 | * variables like CONFIG_PATH or ROOTFS are valid in this | |
668 | * context but others are. */ | |
669 | if (clearenv()) { | |
670 | SYSERROR("failed to clear environment"); | |
671 | /* don't error out though */ | |
672 | } | |
673 | ||
674 | if (putenv("container=lxc")) { | |
675 | SYSERROR("failed to set environment variable"); | |
c4ea60df | 676 | goto out_warn_father; |
f7bee6c6 MW |
677 | } |
678 | ||
773fb9ca | 679 | close(handler->sigfd); |
26ddeedd | 680 | |
1d167857 SH |
681 | if (lxc_check_inherited(handler->conf, -1)) |
682 | return -1; | |
683 | ||
e6126dbe MN |
684 | /* after this call, we are in error because this |
685 | * ops should not return as it execs */ | |
c4ea60df | 686 | handler->ops->start(handler, handler->data); |
50e98013 DL |
687 | |
688 | out_warn_father: | |
544a48a0 SH |
689 | /* we want the parent to know something went wrong, so any |
690 | * value other than what it expects is ok. */ | |
3c22086f | 691 | lxc_sync_wake_parent(handler, LXC_SYNC_POST_CONFIGURE); |
50e98013 DL |
692 | return -1; |
693 | } | |
694 | ||
74a3920a | 695 | static int save_phys_nics(struct lxc_conf *conf) |
7b35f3d6 SH |
696 | { |
697 | struct lxc_list *iterator; | |
698 | ||
699 | lxc_list_for_each(iterator, &conf->network) { | |
700 | struct lxc_netdev *netdev = iterator->elem; | |
701 | ||
702 | if (netdev->type != LXC_NET_PHYS) | |
703 | continue; | |
704 | conf->saved_nics = realloc(conf->saved_nics, | |
705 | (conf->num_savednics+1)*sizeof(struct saved_nic)); | |
706 | if (!conf->saved_nics) { | |
707 | SYSERROR("failed to allocate memory"); | |
708 | return -1; | |
709 | } | |
710 | conf->saved_nics[conf->num_savednics].ifindex = netdev->ifindex; | |
711 | conf->saved_nics[conf->num_savednics].orig_name = strdup(netdev->link); | |
712 | if (!conf->saved_nics[conf->num_savednics].orig_name) { | |
713 | SYSERROR("failed to allocate memory"); | |
714 | return -1; | |
715 | } | |
959aee9c | 716 | INFO("stored saved_nic #%d idx %d name %s", conf->num_savednics, |
7b35f3d6 SH |
717 | conf->saved_nics[conf->num_savednics].ifindex, |
718 | conf->saved_nics[conf->num_savednics].orig_name); | |
719 | conf->num_savednics++; | |
720 | } | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
74a3920a | 725 | static int lxc_spawn(struct lxc_handler *handler) |
59eb99ba | 726 | { |
b98f7d6e | 727 | int failed_before_rename = 0; |
ffe1e01a | 728 | const char *name = handler->name; |
9f30a190 MM |
729 | int saved_ns_fd[LXC_NS_MAX]; |
730 | int preserve_mask = 0, i; | |
731 | ||
732 | for (i = 0; i < LXC_NS_MAX; i++) | |
6c544cb3 | 733 | if (handler->conf->inherit_ns_fd[i] != -1) |
9f30a190 | 734 | preserve_mask |= ns_info[i].clone_flag; |
50e98013 | 735 | |
3c22086f | 736 | if (lxc_sync_init(handler)) |
9d7f9e52 | 737 | return -1; |
0ad19a3f | 738 | |
6c544cb3 | 739 | handler->clone_flags = CLONE_NEWPID|CLONE_NEWNS; |
f6d3e3e4 SH |
740 | if (!lxc_list_empty(&handler->conf->id_map)) { |
741 | INFO("Cloning a new user namespace"); | |
742 | handler->clone_flags |= CLONE_NEWUSER; | |
743 | } | |
0ad19a3f | 744 | |
9f30a190 | 745 | if (handler->conf->inherit_ns_fd[LXC_NS_NET] == -1) { |
26b797f3 | 746 | if (!lxc_requests_empty_network(handler)) |
9f30a190 MM |
747 | handler->clone_flags |= CLONE_NEWNET; |
748 | ||
26b797f3 SH |
749 | if (!lxc_list_empty(&handler->conf->network)) { |
750 | ||
9f30a190 MM |
751 | /* Find gateway addresses from the link device, which is |
752 | * no longer accessible inside the container. Do this | |
753 | * before creating network interfaces, since goto | |
754 | * out_delete_net does not work before lxc_clone. */ | |
755 | if (lxc_find_gateway_addresses(handler)) { | |
756 | ERROR("failed to find gateway addresses"); | |
757 | lxc_sync_fini(handler); | |
758 | return -1; | |
759 | } | |
760 | ||
761 | /* that should be done before the clone because we will | |
762 | * fill the netdev index and use them in the child | |
763 | */ | |
764 | if (lxc_create_network(handler)) { | |
38521a3b | 765 | ERROR("failed to create the network"); |
9f30a190 MM |
766 | lxc_sync_fini(handler); |
767 | return -1; | |
768 | } | |
19a26f82 MK |
769 | } |
770 | ||
9f30a190 MM |
771 | if (save_phys_nics(handler->conf)) { |
772 | ERROR("failed to save physical nic info"); | |
773 | goto out_abort; | |
82d5ae15 | 774 | } |
9f30a190 MM |
775 | } else { |
776 | INFO("Inheriting a net namespace"); | |
82d5ae15 DL |
777 | } |
778 | ||
3c93577b MM |
779 | if (handler->conf->inherit_ns_fd[LXC_NS_IPC] == -1) { |
780 | handler->clone_flags |= CLONE_NEWIPC; | |
781 | } else { | |
782 | INFO("Inheriting an IPC namespace"); | |
7b35f3d6 SH |
783 | } |
784 | ||
6c544cb3 MM |
785 | if (handler->conf->inherit_ns_fd[LXC_NS_UTS] == -1) { |
786 | handler->clone_flags |= CLONE_NEWUTS; | |
787 | } else { | |
788 | INFO("Inheriting a UTS namespace"); | |
789 | } | |
790 | ||
7b35f3d6 | 791 | |
d4ef7c50 SH |
792 | if (!cgroup_init(handler)) { |
793 | ERROR("failed initializing cgroup support"); | |
33ad9f1a CS |
794 | goto out_delete_net; |
795 | } | |
796 | ||
d4ef7c50 SH |
797 | if (!cgroup_create(handler)) { |
798 | ERROR("failed creating cgroups"); | |
47d8fb3b CS |
799 | goto out_delete_net; |
800 | } | |
801 | ||
0c547523 SH |
802 | /* |
803 | * if the rootfs is not a blockdev, prevent the container from | |
804 | * marking it readonly. | |
5e32a990 ÇO |
805 | * |
806 | * if the container is unprivileged then skip rootfs pinning | |
0c547523 | 807 | */ |
5e32a990 ÇO |
808 | if (lxc_list_empty(&handler->conf->id_map)) { |
809 | handler->pinfd = pin_rootfs(handler->conf->rootfs.path); | |
810 | if (handler->pinfd == -1) | |
811 | INFO("failed to pin the container's rootfs"); | |
812 | } | |
0c547523 | 813 | |
cd43d2d1 SH |
814 | if (preserve_ns(saved_ns_fd, preserve_mask) < 0) |
815 | goto out_delete_net; | |
816 | if (attach_ns(handler->conf->inherit_ns_fd) < 0) | |
817 | goto out_delete_net; | |
9f30a190 | 818 | |
0ad19a3f | 819 | /* Create a process in a new set of namespaces */ |
d5088cf2 | 820 | handler->pid = lxc_clone(do_start, handler, handler->clone_flags); |
59eb99ba | 821 | if (handler->pid < 0) { |
36eb9bde | 822 | SYSERROR("failed to fork into a new namespace"); |
7fef7a06 | 823 | goto out_delete_net; |
0ad19a3f | 824 | } |
825 | ||
cd43d2d1 SH |
826 | if (attach_ns(saved_ns_fd)) |
827 | WARN("failed to restore saved namespaces"); | |
9f30a190 | 828 | |
3c22086f CLG |
829 | lxc_sync_fini_child(handler); |
830 | ||
831 | if (lxc_sync_wait_child(handler, LXC_SYNC_CONFIGURE)) | |
99a6af52 | 832 | failed_before_rename = 1; |
0ad19a3f | 833 | |
d4ef7c50 SH |
834 | if (!cgroup_create_legacy(handler)) { |
835 | ERROR("failed to setup the legacy cgroups for %s", name); | |
ae5c8b8e | 836 | goto out_delete_net; |
33ad9f1a | 837 | } |
9daf6f5d SH |
838 | if (!cgroup_setup_limits(handler, false)) { |
839 | ERROR("failed to setup the cgroup limits for '%s'", name); | |
6031a6e5 DE |
840 | goto out_delete_net; |
841 | } | |
842 | ||
d4ef7c50 | 843 | if (!cgroup_enter(handler)) |
7fef7a06 | 844 | goto out_delete_net; |
218d4250 | 845 | |
0996e18a SH |
846 | if (!cgroup_chown(handler)) |
847 | goto out_delete_net; | |
848 | ||
99a6af52 MN |
849 | if (failed_before_rename) |
850 | goto out_delete_net; | |
851 | ||
0ad19a3f | 852 | /* Create the network configuration */ |
d5088cf2 | 853 | if (handler->clone_flags & CLONE_NEWNET) { |
fae349da | 854 | if (lxc_assign_network(&handler->conf->network, handler->pid)) { |
82d5ae15 | 855 | ERROR("failed to create the configured network"); |
7fef7a06 | 856 | goto out_delete_net; |
82d5ae15 | 857 | } |
0ad19a3f | 858 | } |
859 | ||
f6d3e3e4 SH |
860 | /* map the container uids - the container became an invalid |
861 | * userid the moment it was cloned with CLONE_NEWUSER - this | |
862 | * call doesn't change anything immediately, but allows the | |
863 | * container to setuid(0) (0 being mapped to something else on | |
864 | * the host) later to become a valid uid again */ | |
865 | if (lxc_map_ids(&handler->conf->id_map, handler->pid)) { | |
866 | ERROR("failed to set up id mapping"); | |
867 | goto out_delete_net; | |
868 | } | |
869 | ||
544a48a0 SH |
870 | /* Tell the child to continue its initialization. we'll get |
871 | * LXC_SYNC_CGROUP when it is ready for us to setup cgroups | |
3c22086f CLG |
872 | */ |
873 | if (lxc_sync_barrier_child(handler, LXC_SYNC_POST_CONFIGURE)) | |
544a48a0 SH |
874 | goto out_delete_net; |
875 | ||
9daf6f5d | 876 | if (!cgroup_setup_limits(handler, true)) { |
b98f7d6e SH |
877 | ERROR("failed to setup the devices cgroup for '%s'", name); |
878 | goto out_delete_net; | |
544a48a0 SH |
879 | } |
880 | ||
544a48a0 SH |
881 | /* Tell the child to complete its initialization and wait for |
882 | * it to exec or return an error. (the child will never | |
883 | * return LXC_SYNC_POST_CGROUP+1. It will either close the | |
884 | * sync pipe, causing lxc_sync_barrier_child to return | |
885 | * success, or return a different value, causing us to error | |
886 | * out). | |
887 | */ | |
888 | if (lxc_sync_barrier_child(handler, LXC_SYNC_POST_CGROUP)) | |
3c22086f | 889 | return -1; |
0ad19a3f | 890 | |
cc28d0b0 SH |
891 | if (detect_shared_rootfs()) |
892 | umount2(handler->conf->rootfs.mount, MNT_DETACH); | |
893 | ||
23c53af9 | 894 | if (handler->ops->post_start(handler, handler->data)) |
e6126dbe MN |
895 | goto out_abort; |
896 | ||
25c2aca5 | 897 | if (lxc_set_state(name, handler, RUNNING)) { |
59eb99ba DL |
898 | ERROR("failed to set state to %s", |
899 | lxc_state2str(RUNNING)); | |
900 | goto out_abort; | |
3f21c114 | 901 | } |
22ebac19 | 902 | |
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 DL |
910 | out_abort: |
911 | lxc_abort(name, handler); | |
3c22086f | 912 | lxc_sync_fini(handler); |
5c068da9 SH |
913 | if (handler->pinfd >= 0) { |
914 | close(handler->pinfd); | |
915 | handler->pinfd = -1; | |
916 | } | |
917 | ||
b79fcd86 | 918 | return -1; |
59eb99ba | 919 | } |
0ad19a3f | 920 | |
ee70bf78 | 921 | int __lxc_start(const char *name, struct lxc_conf *conf, |
13f5be62 | 922 | struct lxc_operations* ops, void *data, const char *lxcpath) |
59eb99ba | 923 | { |
3a0f472d | 924 | struct lxc_handler *handler; |
e043236e | 925 | int err = -1; |
59eb99ba | 926 | int status; |
80090207 | 927 | |
13f5be62 | 928 | handler = lxc_init(name, conf, lxcpath); |
3a0f472d | 929 | if (!handler) { |
59eb99ba | 930 | ERROR("failed to initialize the container"); |
66aeffc7 | 931 | return -1; |
0ad19a3f | 932 | } |
ee70bf78 CLG |
933 | handler->ops = ops; |
934 | handler->data = data; | |
e6126dbe | 935 | |
b60ed720 | 936 | if (must_drop_cap_sys_boot(handler->conf)) { |
495d2046 | 937 | #if HAVE_SYS_CAPABILITY_H |
959aee9c | 938 | DEBUG("Dropping cap_sys_boot"); |
495d2046 | 939 | #else |
959aee9c | 940 | DEBUG("Can't drop cap_sys_boot as capabilities aren't supported"); |
495d2046 | 941 | #endif |
69182a31 | 942 | } else { |
959aee9c | 943 | DEBUG("Not dropping cap_sys_boot or watching utmp"); |
69182a31 SH |
944 | handler->conf->need_utmp_watch = 0; |
945 | } | |
946 | ||
23c53af9 | 947 | err = lxc_spawn(handler); |
59eb99ba | 948 | if (err) { |
ee70bf78 | 949 | ERROR("failed to spawn '%s'", name); |
74a2b586 | 950 | goto out_fini_nonet; |
0ad19a3f | 951 | } |
952 | ||
3a0f472d | 953 | err = lxc_poll(name, handler); |
e043236e | 954 | if (err) { |
59eb99ba DL |
955 | ERROR("mainloop exited with an error"); |
956 | goto out_abort; | |
957 | } | |
0ad19a3f | 958 | |
3a0f472d | 959 | while (waitpid(handler->pid, &status, 0) < 0 && errno == EINTR) |
1bc5cc8c | 960 | continue; |
e043236e | 961 | |
8b004f07 SH |
962 | /* |
963 | * If the child process exited but was not signaled, | |
964 | * it didn't call reboot. This should mean it was an | |
965 | * lxc-execute which simply exited. In any case, treat | |
966 | * it as a 'halt' | |
967 | */ | |
968 | if (WIFSIGNALED(status)) { | |
969 | switch(WTERMSIG(status)) { | |
970 | case SIGINT: /* halt */ | |
971 | DEBUG("Container halting"); | |
972 | break; | |
973 | case SIGHUP: /* reboot */ | |
974 | DEBUG("Container rebooting"); | |
975 | handler->conf->reboot = 1; | |
976 | break; | |
977 | default: | |
959aee9c | 978 | DEBUG("unknown exit status for init: %d", WTERMSIG(status)); |
8b004f07 SH |
979 | break; |
980 | } | |
828695d9 SH |
981 | } |
982 | ||
7b35f3d6 SH |
983 | lxc_rename_phys_nics_on_shutdown(handler->conf); |
984 | ||
5c068da9 SH |
985 | if (handler->pinfd >= 0) { |
986 | close(handler->pinfd); | |
987 | handler->pinfd = -1; | |
988 | } | |
989 | ||
3a0f472d | 990 | err = lxc_error_set_and_log(handler->pid, status); |
9d7f9e52 | 991 | out_fini: |
74a2b586 JK |
992 | lxc_delete_network(handler); |
993 | ||
994 | out_fini_nonet: | |
3a0f472d | 995 | lxc_fini(name, handler); |
0ad19a3f | 996 | return err; |
997 | ||
59eb99ba | 998 | out_abort: |
3a0f472d | 999 | lxc_abort(name, handler); |
9d7f9e52 | 1000 | goto out_fini; |
0ad19a3f | 1001 | } |
ee70bf78 CLG |
1002 | |
1003 | struct start_args { | |
1004 | char *const *argv; | |
1005 | }; | |
1006 | ||
1007 | static int start(struct lxc_handler *handler, void* data) | |
1008 | { | |
1009 | struct start_args *arg = data; | |
1010 | ||
1011 | NOTICE("exec'ing '%s'", arg->argv[0]); | |
1012 | ||
1013 | execvp(arg->argv[0], arg->argv); | |
1014 | SYSERROR("failed to exec %s", arg->argv[0]); | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | static int post_start(struct lxc_handler *handler, void* data) | |
1019 | { | |
1020 | struct start_args *arg = data; | |
1021 | ||
1022 | NOTICE("'%s' started with pid '%d'", arg->argv[0], handler->pid); | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static struct lxc_operations start_ops = { | |
1027 | .start = start, | |
1028 | .post_start = post_start | |
1029 | }; | |
1030 | ||
13f5be62 SH |
1031 | int lxc_start(const char *name, char *const argv[], struct lxc_conf *conf, |
1032 | const char *lxcpath) | |
ee70bf78 CLG |
1033 | { |
1034 | struct start_args start_arg = { | |
1035 | .argv = argv, | |
1036 | }; | |
1037 | ||
828695d9 | 1038 | conf->need_utmp_watch = 1; |
13f5be62 | 1039 | return __lxc_start(name, conf, &start_ops, &start_arg, lxcpath); |
ee70bf78 | 1040 | } |