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/* Setup a chroot environment for use within tests.
Copyright (C) 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 <stdlib.h>
#include <support/check.h>
#include <support/namespace.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/test-driver.h>
#include <support/xunistd.h>
/* If CONTENTS is not NULL, write it to the file at DIRECTORY/RELPATH,
and store the name in *ABSPATH. If CONTENTS is NULL, store NULL in
*ABSPATH. */
static void
write_file (const char *directory, const char *relpath, const char *contents,
char **abspath)
{
if (contents != NULL)
{
*abspath = xasprintf ("%s/%s", directory, relpath);
add_temp_file (*abspath);
support_write_file_string (*abspath, contents);
}
else
*abspath = NULL;
}
struct support_chroot *
support_chroot_create (struct support_chroot_configuration conf)
{
struct support_chroot *chroot = xmalloc (sizeof (*chroot));
chroot->path_chroot = xasprintf ("%s/tst-resolv-res_init-XXXXXX", test_dir);
if (mkdtemp (chroot->path_chroot) == NULL)
FAIL_EXIT1 ("mkdtemp (\"%s\"): %m", chroot->path_chroot);
add_temp_file (chroot->path_chroot);
/* Create the /etc directory in the chroot environment. */
char *path_etc = xasprintf ("%s/etc", chroot->path_chroot);
xmkdir (path_etc, 0777);
add_temp_file (path_etc);
write_file (path_etc, "resolv.conf", conf.resolv_conf,
&chroot->path_resolv_conf);
write_file (path_etc, "hosts", conf.hosts, &chroot->path_hosts);
write_file (path_etc, "host.conf", conf.host_conf, &chroot->path_host_conf);
free (path_etc);
/* valgrind needs a temporary directory in the chroot. */
{
char *path_tmp = xasprintf ("%s/tmp", chroot->path_chroot);
xmkdir (path_tmp, 0777);
add_temp_file (path_tmp);
free (path_tmp);
}
return chroot;
}
void
support_chroot_free (struct support_chroot *chroot)
{
free (chroot->path_chroot);
free (chroot->path_resolv_conf);
free (chroot->path_hosts);
free (chroot->path_host_conf);
free (chroot);
}
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