Mercurial > hg > toybox
annotate toys/other/unshare.c @ 656:6df4ccc0acbe
Regularize command headers, update links to standards documents.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Sat, 25 Aug 2012 18:08:51 -0500 |
| parents | 2986aa63a021 |
| children | 786841fdb1e0 |
| rev | line source |
|---|---|
| 398 | 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 USE_UNSHARE(NEWTOY(unshare, "<1^nium", TOYFLAG_USR|TOYFLAG_BIN)) | |
| 8 | |
| 9 config UNSHARE | |
| 10 bool "unshare" | |
| 11 default y | |
|
426
8b0487639db9
Add autodetect for container support.
Rob Landley <rob@landley.net>
parents:
398
diff
changeset
|
12 depends on TOYBOX_CONTAINER |
| 398 | 13 help |
| 14 usage: unshare [-muin] COMMAND... | |
| 15 | |
| 16 Create new namespace(s) for this process and its children, so some | |
| 17 attribute is not shared with the parent process. This is part of | |
| 18 Linux Containers. Each process can have its own: | |
| 19 | |
| 20 -m Mount/unmount tree | |
| 21 -u Host and domain names | |
| 22 -i SysV IPC (message queues, semaphores, shared memory) | |
| 23 -n Network address, sockets, routing, iptables | |
| 24 */ | |
| 25 | |
| 26 #include "toys.h" | |
|
537
f70187762108
Work around glibc regression by including Linux header directly.
Rob Landley <rob@landley.net>
parents:
533
diff
changeset
|
27 #include <linux/sched.h> |
|
548
99cb6ad605ee
The linux header doesn't prototype unshare, and the glibc header introduced a regression in recent versions inexplicably crediting a linux feature to the FSF, so add the prototype ourselves.
Rob Landley <rob@landley.net>
parents:
537
diff
changeset
|
28 extern int unshare (int __flags); |
| 398 | 29 |
| 30 void unshare_main(void) | |
| 31 { | |
| 32 unsigned flags[]={CLONE_NEWNS, CLONE_NEWUTS, CLONE_NEWIPC, CLONE_NEWNET,0}; | |
| 33 unsigned f=0; | |
| 34 int i; | |
| 35 | |
| 36 for (i=0; flags[i]; i++) | |
| 37 if (toys.optflags & (1<<i)) | |
| 38 f |= flags[i]; | |
| 39 | |
| 40 if(unshare(f)) perror_exit("failed"); | |
| 41 | |
| 42 xexec(toys.optargs); | |
| 43 } |