Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*
 *  linux/fs/proc/kmsg.c
 *
 *  Copyright (C) 1992  by Linus Torvalds
 *
 */
 
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/fs.h>
 
#include <asm/uaccess.h>
#include <asm/io.h>
 
extern wait_queue_head_t log_wait;
 
extern int do_syslog(int type, char __user *bug, int count);
 
static int kmsg_open(struct inode * inode, struct file * file)
{
	return do_syslog(1,NULL,0);
}
 
static int kmsg_release(struct inode * inode, struct file * file)
{
	(void) do_syslog(0,NULL,0);
	return 0;
}
 
static ssize_t kmsg_read(struct file *file, char __user *buf,
			 size_t count, loff_t *ppos)
{
	if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
		return -EAGAIN;
	return do_syslog(2, buf, count);
}
 
static unsigned int kmsg_poll(struct file *file, poll_table *wait)
{
	poll_wait(file, &log_wait, wait);
	if (do_syslog(9, NULL, 0))
		return POLLIN | POLLRDNORM;
	return 0;
}
 
 
const struct file_operations proc_kmsg_operations = {
	.read		= kmsg_read,
	.poll		= kmsg_poll,
	.open		= kmsg_open,
	.release	= kmsg_release,
};