ioctl.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/*
 * linux/arch/parisc/hpux/ioctl.c
 *
 * implements some necessary HPUX ioctls.
 */

/*
 * Supported ioctls:
 *   TCGETA
 *   TCSETA
 *   TCSETAW
 *   TCSETAF
 *   TCSBRK
 *   TCXONC
 *   TCFLSH
 *   TIOCGWINSZ
 *   TIOCSWINSZ
 *   TIOCGPGRP
 *   TIOCSPGRP
 */

#include <linux/smp_lock.h>
#include <asm/errno.h>
#include <asm/ioctl.h>
#include <asm/termios.h>
#include <asm/uaccess.h>

int sys_ioctl(unsigned int, unsigned int, unsigned long);
 
static int hpux_ioctl_t(int fd, unsigned long cmd, unsigned long arg)
{
	int result = -EOPNOTSUPP;
	int nr = _IOC_NR(cmd);
	switch (nr) {
	case 106:
		result = sys_ioctl(fd, TIOCSWINSZ, arg);
		break;
	case 107:
		result = sys_ioctl(fd, TIOCGWINSZ, arg);
		break;
	}
	return result;
}

int hpux_ioctl(int fd, unsigned long cmd, unsigned long arg)
{
	int result = -EOPNOTSUPP;
	int type = _IOC_TYPE(cmd);
	switch (type) {
	case 'T':
		/* Our structures are now compatible with HPUX's */
		result = sys_ioctl(fd, cmd, arg);
		break;
	case 't':
		result = hpux_ioctl_t(fd, cmd, arg);
		break;
	default:
		/* If my mother ever sees this, I hope she disowns me.
		 * Take this out after NYLWE. */
		result = sys_ioctl(fd, cmd, arg);
	}
	return result;
}