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comparison toys/other/unshare.c @ 653:2986aa63a021

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Move commands into "posix", "lsb", and "other" menus/directories.
author Rob Landley <rob@landley.net>
date Sat, 25 Aug 2012 14:25:22 -0500
parents toys/unshare.c@99cb6ad605ee
children 6df4ccc0acbe
comparison
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652:2d7c56913fda 653:2986aa63a021
1 /* vi: set sw=4 ts=4:
2 *
3 * unshare.c - run command in new context
4 *
5 * Copyright 2011 Rob Landley <rob@landley.net>
6 *
7 * Not in SUSv4.
8
9 USE_UNSHARE(NEWTOY(unshare, "<1^nium", TOYFLAG_USR|TOYFLAG_BIN))
10
11 config UNSHARE
12 bool "unshare"
13 default y
14 depends on TOYBOX_CONTAINER
15 help
16 usage: unshare [-muin] COMMAND...
17
18 Create new namespace(s) for this process and its children, so some
19 attribute is not shared with the parent process. This is part of
20 Linux Containers. Each process can have its own:
21
22 -m Mount/unmount tree
23 -u Host and domain names
24 -i SysV IPC (message queues, semaphores, shared memory)
25 -n Network address, sockets, routing, iptables
26 */
27
28 #include "toys.h"
29 #include <linux/sched.h>
30 extern int unshare (int __flags);
31
32 void unshare_main(void)
33 {
34 unsigned flags[]={CLONE_NEWNS, CLONE_NEWUTS, CLONE_NEWIPC, CLONE_NEWNET,0};
35 unsigned f=0;
36 int i;
37
38 for (i=0; flags[i]; i++)
39 if (toys.optflags & (1<<i))
40 f |= flags[i];
41
42 if(unshare(f)) perror_exit("failed");
43
44 xexec(toys.optargs);
45 }