//-------------------------------------------------------------------
//	realtimers.c
//
//	This module creates a pseudo-file (named '/proc/realtimers')
//	which shows current tasks that have an active 'real_timer'.
//
//	programmer: ALLAN CRUSE
//	date begun: 19 SEP 2004
//-------------------------------------------------------------------

#include <linux/module.h>	// for init_module() 
#include <linux/proc_fs.h>	// for create_proc_read_entry() 

static char modname[] = "realtimers";

static int my_proc_read( char *buf, char **start, off_t off,
			int count, int *eof, void *data )
{
	struct task_struct	*tsk = &init_task;
	struct timer_list	*tlp;
	int			len = 0;

	len += sprintf( buf+len, "\n%s ", modname );
	len += sprintf( buf+len, "(jiffies=%d)\n", jiffies );
	do	{
		tlp = &tsk->real_timer;
		if ( tlp->list.next == NULL ) continue;
		len += sprintf( buf+len, "next=%08X ", tlp->list.next );
		len += sprintf( buf+len, "prev=%08X ", tlp->list.prev );
		len += sprintf( buf+len, "expires=%-10u ", tlp->expires );
		len += sprintf( buf+len, "(pid=%5d): ", tsk->pid );
		len += sprintf( buf+len, "%-16s ", tsk->comm );
		len += sprintf( buf+len, "\n" );
		}
	while ( ( tsk = tsk->next_task ) != &init_task );
	len += sprintf( buf+len, "\n" );
	return	len;
}

void cleanup_module( void )
{
	remove_proc_entry( modname, NULL );
	printk( "<1>Removing \'%s\' module\n", modname );
}


int init_module( void )
{
	printk( "<1>\nInstalling \'%s\' module\n", modname );
	create_proc_read_entry( modname, 0, NULL, my_proc_read, NULL );
	return	0; // SUCCESS;
}

MODULE_LICENSE("GPL");