/*
 * get_classdev_parent.c
 *
 * Utility to get a given class device as well as its parent if available
 *
 * Copyright (C) IBM Corp. 2003
 *
 *      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 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, write to the Free Software Foundation, Inc.,
 *      675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <stdio.h>
#include <stdlib.h>

#include "libsysfs.h"

int main(int argc, char *argv[])
{
	struct sysfs_class_device *cdev = NULL, *parent = NULL;
	struct sysfs_attribute *attr = NULL;
	struct dlist *attrlist = NULL;
	struct sysfs_device *device = NULL;
	struct sysfs_driver *driver = NULL;

	/* FIXME: edit this path to any valid path on your system to test */
	cdev = sysfs_open_class_device_path("/sys/block/sda/sda1");
	if (cdev == NULL) {
		fprintf(stdout, "Class device not found\n");
		return 1;
	}
	
	fprintf(stdout, "Class device \"%s\"\n", cdev->name);
	
	attrlist = sysfs_get_classdev_attributes(cdev);
	if (attrlist != NULL) {
		dlist_for_each_data(attrlist, attr, struct sysfs_attribute) 
			fprintf(stdout, "\t%-20s : %s", 
					attr->name, attr->value);
	}
	fprintf(stdout, "\n");
		
	device = sysfs_get_classdev_device(cdev);
	if (device)
		fprintf(stdout, "\tDevice : \"%s\"\n", cdev->sysdevice->bus_id);
	driver = sysfs_get_classdev_driver(cdev);
	if (driver)
		fprintf(stdout, "\tDriver : \"%s\"\n", cdev->driver->name);

	parent = sysfs_get_classdev_parent(cdev);
	if (parent != NULL) {
		fprintf(stdout, "Device \"%s\"'s parent is \"%s\"\n", 
				cdev->name, parent->name);
		attrlist = sysfs_get_classdev_attributes(parent);
		if (attrlist != NULL) {
			dlist_for_each_data(attrlist, attr, 
					struct sysfs_attribute) 
				fprintf(stdout, "\t%-20s : %s", 
						attr->name, attr->value);
		}
		fprintf(stdout, "\n");
	} else
		fprintf(stdout, "No parent device found\n");

	sysfs_close_class_device(cdev);
	return 0;
}