/*
 *  linux/fs/minix/chrdev.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file README.legal in the main directory of this archive
 * for more details.
 */

#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/minix_fs.h>
#include <linux/tty.h>
#include <linux/stat.h>
#include <linux/fcntl.h>

/*
 * Called every time a minix character special file is opened
 */
static int chrdev_open(struct inode * inode, struct file * filp)
{
	int i;

	i = MAJOR(inode->i_rdev);
 	if (i >= MAX_CHRDEV || !chrdev_fops[i])
 		return -ENODEV;
 	filp->f_op = chrdev_fops[i];
 	if (filp->f_op->open)
 		return filp->f_op->open(inode,filp);
	return 0;
}

/*
 * Dummy default file-operations: the only thing this does
 * is contain the open that then fills in the correct operations
 * depending on the special file...
 */
static struct file_operations def_chr_fops = {
	NULL,		/* lseek */
	NULL,		/* read */
	NULL,		/* write */
	NULL,		/* readdir */
	NULL,		/* select */
	NULL,		/* ioctl */
	NULL,		/* mmap */
	chrdev_open,	/* open */
	NULL,		/* release */
};

struct inode_operations minix_chrdev_inode_operations = {
	&def_chr_fops,		/* default file operations */
	NULL,			/* create */
	NULL,			/* lookup */
	NULL,			/* link */
	NULL,			/* unlink */
	NULL,			/* symlink */
	NULL,			/* mkdir */
	NULL,			/* rmdir */
	NULL,			/* mknod */
	NULL,			/* rename */
	NULL,			/* readlink */
	NULL,			/* follow_link */
	NULL,			/* bmap */
	NULL,			/* truncate */
	NULL			/* permission */
};