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/*
* Copyright (C) 2015 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.0+
*
* This 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 of the License, or (at your option) any later version.
*
* This 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 this library. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "libglnx.h"
#include "libostreetest.h"
/* This function hovers in a quantum superposition of horrifying and
* beautiful. Future generations may interpret it as modern art.
*/
gboolean
ot_test_run_libtest (const char *cmd, GError **error)
{
const char *srcdir = g_getenv ("G_TEST_SRCDIR");
g_assert (srcdir != NULL);
g_assert (cmd != NULL);
g_autoptr (GPtrArray) argv = g_ptr_array_new ();
g_ptr_array_add (argv, "bash");
g_ptr_array_add (argv, "-c");
g_autoptr (GString) cmdstr = g_string_new ("");
g_string_append (cmdstr, "set -xeuo pipefail; . ");
g_string_append (cmdstr, srcdir);
g_string_append (cmdstr, "/tests/libtest.sh; ");
g_string_append (cmdstr, cmd);
g_ptr_array_add (argv, cmdstr->str);
g_ptr_array_add (argv, NULL);
int estatus;
if (!g_spawn_sync (NULL, (char **)argv->pdata, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, NULL,
&estatus, error))
return FALSE;
if (!g_spawn_check_exit_status (estatus, error))
return FALSE;
return TRUE;
}
OstreeRepo *
ot_test_setup_repo (GCancellable *cancellable, GError **error)
{
if (!ot_test_run_libtest ("setup_test_repository archive", error))
return NULL;
g_autoptr (GFile) repo_path = g_file_new_for_path ("repo");
g_autoptr (OstreeRepo) ret_repo = ostree_repo_new (repo_path);
if (!ostree_repo_open (ret_repo, cancellable, error))
return NULL;
return g_steal_pointer (&ret_repo);
}
/* Determine whether we're able to relabel files. Needed for bare tests. */
gboolean
ot_check_relabeling (gboolean *can_relabel, GError **error)
{
g_auto (GLnxTmpfile) tmpf = {
0,
};
if (!glnx_open_tmpfile_linkable_at (AT_FDCWD, ".", O_RDWR | O_CLOEXEC, &tmpf, error))
return FALSE;
g_autoptr (GError) local_error = NULL;
g_autoptr (GBytes) bytes = glnx_fgetxattr_bytes (tmpf.fd, "security.selinux", &local_error);
if (!bytes)
{
/* libglnx preserves errno. The EOPNOTSUPP case can't be part of a
* 'case' statement because on most but not all architectures,
* it's numerically equal to ENOTSUP. */
if (G_IN_SET (errno, ENOTSUP, ENODATA) || errno == EOPNOTSUPP)
{
*can_relabel = FALSE;
return TRUE;
}
g_propagate_error (error, g_steal_pointer (&local_error));
return FALSE;
}
gsize data_len;
const guint8 *data = g_bytes_get_data (bytes, &data_len);
if (fsetxattr (tmpf.fd, "security.selinux", data, data_len, 0) < 0)
{
if (errno == ENOTSUP || errno == EOPNOTSUPP)
{
*can_relabel = FALSE;
return TRUE;
}
return glnx_throw_errno_prefix (error, "fsetxattr");
}
*can_relabel = TRUE;
return TRUE;
}
/* Determine whether the filesystem supports getting/setting user xattrs. */
gboolean
ot_check_user_xattrs (gboolean *has_user_xattrs, GError **error)
{
g_auto (GLnxTmpfile) tmpf = {
0,
};
if (!glnx_open_tmpfile_linkable_at (AT_FDCWD, ".", O_RDWR | O_CLOEXEC, &tmpf, error))
return FALSE;
if (fsetxattr (tmpf.fd, "user.test", "novalue", strlen ("novalue"), 0) < 0)
{
if (errno == ENOTSUP || errno == EOPNOTSUPP)
{
*has_user_xattrs = FALSE;
return TRUE;
}
return glnx_throw_errno_prefix (error, "fsetxattr");
}
*has_user_xattrs = TRUE;
return TRUE;
}
OstreeSysroot *
ot_test_setup_sysroot (GCancellable *cancellable, GError **error)
{
if (!ot_test_run_libtest ("setup_os_repository \"archive\" \"syslinux\"", error))
return FALSE;
g_autoptr (GString) buf = g_string_new ("mutable-deployments");
gboolean can_relabel = FALSE;
if (!ot_check_relabeling (&can_relabel, error))
return FALSE;
if (!can_relabel)
{
g_print ("libostreetest: can't relabel, turning off xattrs\n");
g_string_append (buf, ",no-xattrs");
}
/* Make sure deployments are mutable */
if (!g_setenv ("OSTREE_SYSROOT_DEBUG", buf->str, TRUE))
return glnx_null_throw (error, "Failed to set environment variable OSTREE_SYSROOT_DEBUG");
g_autoptr (GFile) sysroot_path = g_file_new_for_path ("sysroot");
return ostree_sysroot_new (sysroot_path);
}
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