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/* Test setgroups as root and in the presence of threads (Bug 26248)
Copyright (C) 2020-2021 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
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <limits.h>
#include <grp.h>
#include <errno.h>
#include <error.h>
#include <support/xthread.h>
#include <support/support.h>
#include <support/test-driver.h>
#include <support/xunistd.h>
/* The purpose of this test is to test the setgroups API as root and in
the presence of threads. Once we create a thread the setgroups
implementation must ensure that all threads are set to the same
group and this operation should not fail. Lastly we test setgroups
with a zero sized group and a bad address and verify we get EPERM. */
static void *
start_routine (void *args)
{
return NULL;
}
static int
do_test (void)
{
int size;
/* NB: Stack address can be at 0xfffXXXXX on 32-bit OSes. */
gid_t list[NGROUPS_MAX];
int status = EXIT_SUCCESS;
pthread_t thread = xpthread_create (NULL, start_routine, NULL);
size = getgroups (sizeof (list) / sizeof (list[0]), list);
if (size < 0)
{
status = EXIT_FAILURE;
error (0, errno, "getgroups failed");
}
if (setgroups (size, list) < 0)
{
if (errno == EPERM)
status = EXIT_UNSUPPORTED;
else
{
status = EXIT_FAILURE;
error (0, errno, "setgroups failed");
}
}
if (status == EXIT_SUCCESS && setgroups (0, list) < 0)
{
status = EXIT_FAILURE;
error (0, errno, "setgroups failed");
}
xpthread_join (thread);
return status;
}
#include <support/test-driver.c>
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