src/lxc/namespace.h

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2009
   5  *
   6  * Authors:
   7  * Daniel Lezcano <dlezcano at fr.ibm.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23 #ifndef __namespace_h
  24 #define __namespace_h
  25
  26 #include <syscall.h>
  27 #define _GNU_SOURCE
  28 #include <sched.h>
  29
  30 #ifndef CLONE_FS
  31 #  define CLONE_FS                0x00000200
  32 #endif
  33 #ifndef CLONE_NEWNS
  34 #  define CLONE_NEWNS             0x00020000
  35 #endif
  36 #ifndef CLONE_NEWUTS
  37 #  define CLONE_NEWUTS            0x04000000
  38 #endif
  39 #ifndef CLONE_NEWIPC
  40 #  define CLONE_NEWIPC            0x08000000
  41 #endif
  42 #ifndef CLONE_NEWUSER
  43 #  define CLONE_NEWUSER           0x10000000
  44 #endif
  45 #ifndef CLONE_NEWPID
  46 #  define CLONE_NEWPID            0x20000000
  47 #endif
  48 #ifndef CLONE_NEWNET
  49 #  define CLONE_NEWNET            0x40000000
  50 #endif
  51
  52 #if __i386__ || __x86_64__ || __powerpc__
  53 #   define fork_ns(flags) syscall(SYS_clone, flags|SIGCHLD, NULL)
  54 #elif __s390__
  55 #   define fork_ns(flags) syscall(SYS_clone, NULL, flags|SIGCHLD)
  56 #elif __ia64__
  57 #   define fork_ns(flags) syscall(SYS_clone2, flags|SIGCHLD, NULL)
  58 #else
  59 #   error "unsupported architecture"
  60 #endif
  61
  62 #define unshare_ns(flags) unshare(flags)
  63
  64 extern pid_t lxc_clone(int (*fn)(void *), void *arg, int flags);
  65
  66 #endif