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/*
* get_class_dev_attr.c
*
* Utility to find an attr of a class device
*
* Copyright (C) IBM Corp. 2003-2005
*
* 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"
static void print_usage(void)
{
fprintf(stdout, "Usage: get_class_dev_attr [class name] [class_device] [attribute]\n");
}
int main(int argc, char *argv[])
{
struct sysfs_class *cls = NULL;
struct sysfs_class_device *cdev = NULL;
struct sysfs_device *dev = NULL;
struct sysfs_attribute *attr;
struct dlist *list;
if (argc != 4) {
print_usage();
return 1;
}
cls = sysfs_open_class(argv[1]);
if (!cls) {
fprintf(stdout, "Error opening class\n");
return 1;
}
list = sysfs_get_class_devices(cls);
if (!list)
return 1;
dlist_for_each_data(list, cdev, struct sysfs_class_device) {
if (!cdev) {
fprintf(stdout, "Device \"%s\" not found\n", argv[2]);
return 1;
}
fprintf(stdout, "Class device \"%s\"\n", cdev->name);
fprintf(stdout, "Class \"%s\"\n", cdev->classname);
attr = sysfs_get_classdev_attr(cdev, argv[3]);
if (attr)
fprintf(stdout, "\t%-20s : %s", attr->name, attr->value);
fprintf(stdout, "\n");
dev = sysfs_get_classdev_device(cdev);
if (dev)
fprintf(stdout, "device is %s on bus %s using driver %s\n",
dev->name, dev->bus, dev->driver_name);
else
fprintf(stdout, "no device found\n");
}
sysfs_close_class(cls);
return 0;
}
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