Mercurial > hg > toybox
view toys/unshare.c @ 481:e1b9a8579ddb
mkswap helpstring and argument string
author | Elie De Brauwer <eliedebrauwer@gmail.com> |
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date | Sat, 18 Feb 2012 14:13:55 +0100 |
parents | 8b0487639db9 |
children | 31215cc6c9f2 |
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/* vi: set sw=4 ts=4: * * unshare.c - run command in new context * * Copyright 2011 Rob Landley <rob@landley.net> * * Not in SUSv4. 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 <sched.h> 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); }