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/*
* linux/fs/ioctl.c
*
* (C) 1991 Linus Torvalds
*/
/* #include <string.h>*/
#include <errno.h>
#include <sys/stat.h>
#include <linux/sched.h>
extern int tty_ioctl(int dev, int cmd, int arg);
typedef int (*ioctl_ptr)(int dev,int cmd,int arg);
#define NRDEVS ((sizeof (ioctl_table))/(sizeof (ioctl_ptr)))
static ioctl_ptr ioctl_table[]={
NULL, /* nodev */
NULL, /* /dev/mem */
NULL, /* /dev/fd */
NULL, /* /dev/hd */
tty_ioctl, /* /dev/ttyx */
tty_ioctl, /* /dev/tty */
NULL, /* /dev/lp */
NULL}; /* named pipes */
int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
struct file * filp;
int dev,mode;
if (fd >= NR_OPEN || !(filp = current->filp[fd]))
return -EBADF;
mode=filp->f_inode->i_mode;
if (!S_ISCHR(mode) && !S_ISBLK(mode))
return -EINVAL;
dev = filp->f_inode->i_zone[0];
if (MAJOR(dev) >= NRDEVS)
return -ENODEV;
if (!ioctl_table[MAJOR(dev)])
return -ENOTTY;
return ioctl_table[MAJOR(dev)](dev,cmd,arg);
}
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