mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +00:00
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* Acquire root privileges.
|
|
Copyright (C) 2016-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <support/namespace.h>
|
|
|
|
#include <sched.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
bool
|
|
support_become_root (void)
|
|
{
|
|
#ifdef CLONE_NEWUSER
|
|
if (unshare (CLONE_NEWUSER | CLONE_NEWNS) == 0)
|
|
/* Even if we do not have UID zero, we have extended privileges at
|
|
this point. */
|
|
return true;
|
|
#endif
|
|
if (setuid (0) != 0)
|
|
{
|
|
printf ("warning: could not become root outside namespace (%m)\n");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|