/*
 *  hello-5.c - Demonstrates command line argument passing to a module.
 */
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/stat.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Peter Jay Salzman");

static short int myshort = 1;
static int myint = 420;
static long int mylong = 9999;
static char *mystring = "blah";

/* 
 * module_param(foo, int, 0000)
 * The first param is the parameters name
 * The second param is it's data type
 * The final argument is the permissions bits, 
 * for exposing parameters in sysfs (if non-zero) at a later stage.
 */

module_param(myshort, short, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
MODULE_PARM_DESC(myshort, "A short integer");
module_param(myint, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
MODULE_PARM_DESC(myint, "An integer");
module_param(mylong, long, S_IRUSR);
MODULE_PARM_DESC(mylong, "A long integer");
module_param(mystring, charp, 0000);
MODULE_PARM_DESC(mystring, "A character string");

static int __init hello_5_init(void)
{
	printk(KERN_ALERT "Hello, world 5\n=============\n");
	printk(KERN_ALERT "myshort is a short integer: %hd\n", myshort);
	printk(KERN_ALERT "myint is an integer: %d\n", myint);
	printk(KERN_ALERT "mylong is a long integer: %ld\n", mylong);
	printk(KERN_ALERT "mystring is a string: %s\n", mystring);
	return 0;
}

static void __exit hello_5_exit(void)
{
	printk(KERN_ALERT "Goodbye, world 5\n");
}

module_init(hello_5_init);
module_exit(hello_5_exit);