]>
git.proxmox.com Git - mirror_lxc.git/blob - src/lxc/namespace.c
2 * lxc: linux Container library
4 * (C) Copyright IBM Corp. 2007, 2009
7 * Daniel Lezcano <dlezcano at fr.ibm.com>
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.
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.
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
29 #include <sys/param.h>
30 #include <sys/types.h>
34 #include "namespace.h"
37 lxc_log_define(lxc_namespace
, lxc
);
44 static int do_clone(void *arg
)
46 struct clone_arg
*clone_arg
= arg
;
47 return clone_arg
->fn(clone_arg
->arg
);
50 pid_t
lxc_clone(int (*fn
)(void *), void *arg
, int flags
)
52 struct clone_arg clone_arg
= {
57 long stack_size
= sysconf(_SC_PAGESIZE
);
58 void *stack
= alloca(stack_size
);
62 ret
= __clone2(do_clone
, stack
,
63 stack_size
, flags
| SIGCHLD
, &clone_arg
);
65 ret
= clone(do_clone
, stack
+ stack_size
, flags
| SIGCHLD
, &clone_arg
);
68 ERROR("failed to clone(0x%x): %s", flags
, strerror(errno
));
73 static char *namespaces_list
[] = {
74 "MOUNT", "PID", "UTSNAME", "IPC",
77 static int cloneflags_list
[] = {
78 CLONE_NEWNS
, CLONE_NEWPID
, CLONE_NEWUTS
, CLONE_NEWIPC
,
79 CLONE_NEWUSER
, CLONE_NEWNET
82 int lxc_namespace_2_cloneflag(char *namespace)
85 len
= sizeof(namespaces_list
)/sizeof(namespaces_list
[0]);
86 for (i
= 0; i
< len
; i
++)
87 if (!strcmp(namespaces_list
[i
], namespace))
88 return cloneflags_list
[i
];
90 ERROR("invalid namespace name %s", namespace);
94 int lxc_fill_namespace_flags(char *flaglist
, int *flags
)
96 char *token
, *saveptr
= NULL
;
100 ERROR("need at least one namespace to unshare");
104 token
= strtok_r(flaglist
, "|", &saveptr
);
107 aflag
= lxc_namespace_2_cloneflag(token
);
113 token
= strtok_r(NULL
, "|", &saveptr
);