Unable to get new root in new namespace

[Prabhunath G]

Hi All,

       Here is the complete code attempting to work in the new root of the
new namespace. This program is built and executed successfully.
       But within the child context, my root is still the original root
directory. My intention is to make */opt/lxc/ *as my new root.
       Required executables (bash and ls) along with the required libraries
are placed in /opt/lxc.
       ** New PID Namespace is working right.
       # ls /proc is showing the processes that are executed only in the
new namespace.
      Any help is appreciated.

-----------------------------------------------------------------------------------------------------------------------------------------
#define STACK_SIZE (8 * 1024)
unsigned char stack[STACK_SIZE];
char *args[] = { "/usr/bin/bash", NULL };

int child_function (void *arg)
{

    ret = mount("", "/", "", MS_REC|MS_PRIVATE, NULL);
    ret = mount("/opt/lxc/", "/", "", MS_BIND|MS_REC, NULL);
    ret = mount("proc", "/proc", "proc", 0, NULL);
    execv(args[0],args);
    return 0;
}
int main()
{
        unshare (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC | CLONE_NEWPID |
CLONE_NEWNET);

        clone(child_function, stack+STACK_SIZE, CLONE_PARENT | SIGCHLD,
NULL);

         return 0;
}
-----------------------------------------------------------------------------------------------------------------------------------------------------

Regards,
Prabhu
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