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5bb3ba8a DL |
1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2009 | |
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 | ||
24 | #include <unistd.h> | |
25 | #include <alloca.h> | |
26 | #include <errno.h> | |
27 | #include <signal.h> | |
28 | #include <namespace.h> | |
29 | ||
00b3c2e2 | 30 | #include <lxc/log.h> |
5bb3ba8a DL |
31 | |
32 | lxc_log_define(lxc_namespace, lxc); | |
33 | ||
34 | struct clone_arg { | |
35 | int (*fn)(void *); | |
36 | void *arg; | |
37 | }; | |
38 | ||
39 | static int do_clone(void *arg) | |
40 | { | |
41 | struct clone_arg *clone_arg = arg; | |
42 | return clone_arg->fn(clone_arg->arg); | |
43 | } | |
44 | ||
45 | pid_t lxc_clone(int (*fn)(void *), void *arg, int flags) | |
46 | { | |
47 | struct clone_arg clone_arg = { | |
48 | .fn = fn, | |
49 | .arg = arg, | |
50 | }; | |
51 | ||
52 | long stack_size = sysconf(_SC_PAGESIZE); | |
d983b93c | 53 | void *stack = alloca(stack_size) + stack_size; |
5bb3ba8a DL |
54 | pid_t ret; |
55 | ||
246091b9 DL |
56 | #ifdef __ia64__ |
57 | ret = __clone2(do_clone, stack, | |
58 | stack_size, flags | SIGCHLD, &clone_arg); | |
59 | #else | |
5bb3ba8a | 60 | ret = clone(do_clone, stack, flags | SIGCHLD, &clone_arg); |
246091b9 | 61 | #endif |
5bb3ba8a DL |
62 | if (ret < 0) |
63 | ERROR("failed to clone(0x%x): %s", flags, strerror(errno)); | |
64 | ||
65 | return ret; | |
66 | } |