swupd-server/src/chroot.c

/*
 *   Software Updater - server side
 *
 *      Copyright © 2012-2016 Intel Corporation.
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, version 2 or later of the License.
 *
 *   This program 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Authors:
 *         Arjan van de Ven <arjan@linux.intel.com>
 *
 */

#define _GNU_SOURCE
#include <assert.h>
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "swupd.h"

void chroot_create_full(int newversion)
{
	char *group;
	char *param;
	char *full_dir;

	string_or_die(&full_dir, "%s/%i/full/", image_dir, newversion);
	if (!access(full_dir, R_OK | X_OK)) {
		free(full_dir);
		return;
	}

	g_mkdir_with_parents(full_dir, S_IRWXU);

	/* start with base */
	string_or_die(&param, "%s/%i/os-core/", image_dir, newversion);
	if (!access(param, F_OK)) {
		LOG(NULL, "Copying chroot os-core to full", "");
		char *const rsynccmd[] = { "rsync", "-aAX", param, full_dir, NULL };
		if (system_argv(rsynccmd) != 0) {
			assert(0);
		}
	}
	free(param);

	/* overlay any new files from each group */
	while (1) {
		group = next_group();
		if (!group) {
			break;
		}

		string_or_die(&param, "%s/%i/%s/", image_dir, newversion, group);
		if (!access(param, F_OK)) {
			LOG(NULL, "Overlaying bundle chroot onto full", "%s", group);
			char *const rsynccmd[] = { "rsync", "-aAX", "--ignore-existing", param, full_dir, NULL };
			if (system_argv(rsynccmd) != 0) {
				assert(0);
			}
		}
		free(param);
	}
	free(full_dir);
}