Mercurial > hg > toybox
view toys/other/unshare.c @ 694:786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
The actual code should be the same afterward, this is just cosmetic refactoring.
author | Rob Landley <rob@landley.net> |
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date | Tue, 13 Nov 2012 17:14:08 -0600 |
parents | 6df4ccc0acbe |
children | 144d5ba7d410 |
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/* unshare.c - run command in new context * * Copyright 2011 Rob Landley <rob@landley.net> USE_UNSHARE(NEWTOY(unshare, "<1^nium", TOYFLAG_USR|TOYFLAG_BIN)) config UNSHARE bool "unshare" default y depends on TOYBOX_CONTAINER help usage: unshare [-muin] COMMAND... Create new namespace(s) for this process and its children, so some attribute is not shared with the parent process. This is part of Linux Containers. Each process can have its own: -m Mount/unmount tree -u Host and domain names -i SysV IPC (message queues, semaphores, shared memory) -n Network address, sockets, routing, iptables */ #include "toys.h" #include <linux/sched.h> extern int unshare (int __flags); void unshare_main(void) { unsigned flags[]={CLONE_NEWNS, CLONE_NEWUTS, CLONE_NEWIPC, CLONE_NEWNET, 0}; unsigned f=0; int i; for (i=0; flags[i]; i++) if (toys.optflags & (1<<i)) f |= flags[i]; if(unshare(f)) perror_exit("failed"); xexec(toys.optargs); }