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/* Test that reloading is disabled after a chroot.
Copyright (C) 2020-2024 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 <nss.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <netdb.h>
#include <support/support.h>
#include <support/check.h>
#include <support/xunistd.h>
#include "nss_test.h"
#ifndef PATH_MAX
# define PATH_MAX 1024
#endif
static struct passwd pwd_table1[] =
{
PWD_N (1234, "test1"),
PWD_N (4321, "test2"),
PWD_LAST ()
};
static const char *group_4[] = {
"alpha", "beta", "gamma", "fred", NULL
};
static struct group group_table_data1[] =
{
GRP (4),
GRP_LAST ()
};
void
_nss_test1_init_hook (test_tables *t)
{
t->pwd_table = pwd_table1;
t->grp_table = group_table_data1;
}
static struct passwd pwd_table2[] =
{
PWD_N (5, "test1"),
PWD_N (2468, "test2"),
PWD_LAST ()
};
static const char *group_5[] = {
"fred", NULL
};
static struct group group_table_data2[] =
{
GRP (5),
GRP_LAST ()
};
void
_nss_test2_init_hook (test_tables *t)
{
t->pwd_table = pwd_table2;
t->grp_table = group_table_data2;
}
static int
do_test (void)
{
struct passwd *pw;
struct group *gr;
struct hostent *he;
char buf1[PATH_MAX];
char buf2[PATH_MAX];
support_need_proc ("Our xmkdirp fails if we can't map our uid, which requires /proc.");
sprintf (buf1, "/subdir%s", support_slibdir_prefix);
xmkdirp (buf1, 0777);
/* Copy this DSO into the chroot so it *could* be loaded. */
sprintf (buf1, "%s/libnss_files.so.2", support_slibdir_prefix);
sprintf (buf2, "/subdir%s/libnss_files.so.2", support_slibdir_prefix);
support_copy_file (buf1, buf2);
/* Check we're using the "outer" nsswitch.conf. */
/* This uses the test1 DSO. */
pw = getpwnam ("test1");
TEST_VERIFY (pw != NULL);
if (pw)
TEST_COMPARE (pw->pw_uid, 1234);
/* This just loads the test2 DSO. */
gr = getgrgid (5);
TEST_VERIFY (gr != NULL);
/* Change the root dir. */
TEST_VERIFY (chroot ("/subdir") == 0);
xchdir ("/");
/* Check we're NOT using the "inner" nsswitch.conf. */
/* Both DSOs are loaded, which is used? */
pw = getpwnam ("test2");
TEST_VERIFY (pw != NULL);
if (pw)
TEST_VERIFY (pw->pw_uid != 2468);
/* We should still be using the old configuration. */
pw = getpwnam ("test1");
TEST_VERIFY (pw != NULL);
if (pw)
TEST_COMPARE (pw->pw_uid, 1234);
gr = getgrgid (5);
TEST_VERIFY (gr != NULL);
gr = getgrnam ("name4");
TEST_VERIFY (gr == NULL);
/* hosts in the outer nsswitch is files; the inner one is test1.
Verify that we're still using the outer nsswitch *and* that we
can load the files DSO. */
he = gethostbyname ("test2");
TEST_VERIFY (he != NULL);
return 0;
}
#include <support/test-driver.c>
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