Mercurial > hg > toybox
view toys/other/unshare.c @ 1526:33b3b5f9e6c6 draft
unshare: Fix help and option parsing
The help text was inconsistent, and option parsing was completely broken
(the options mostly did the wrong thing).
author | Andy Lutomirski <luto@amacapital.net> |
---|---|
date | Fri, 17 Oct 2014 18:40:03 -0700 |
parents | 0d0c01ac5c63 |
children |
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/* unshare.c - run command in new context * * Copyright 2011 Rob Landley <rob@landley.net> USE_UNSHARE(NEWTOY(unshare, "<1^imnpuU", TOYFLAG_USR|TOYFLAG_BIN)) config UNSHARE bool "unshare" default y depends on TOYBOX_CONTAINER help usage: unshare [-imnpuU] 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: -i SysV IPC (message queues, semaphores, shared memory) -m Mount/unmount tree -n Network address, sockets, routing, iptables -p Process IDs and init -u Host and domain names -U UIDs, GIDs, capabilities */ #include "toys.h" #include <linux/sched.h> extern int unshare (int __flags); void unshare_main(void) { unsigned flags[]={CLONE_NEWUSER, CLONE_NEWUTS, CLONE_NEWPID, CLONE_NEWNET, CLONE_NEWNS, CLONE_NEWIPC, 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_optargs(0); }