Viewing file:  irixioctl.c (5.63 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* irixioctl.c: A fucking mess...
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/tty.h>
#include <linux/file.h>
#include <asm/uaccess.h>
#include <asm/ioctl.h>
#include <asm/ioctls.h>
#undef DEBUG_IOCTLS
#undef DEBUG_MISSING_IOCTL
struct irix_termios {
tcflag_t c_iflag, c_oflag, c_cflag, c_lflag;
cc_t c_cc[NCCS];
};
extern asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd,
unsigned long arg);
extern asmlinkage int sys_write(unsigned int fd,char * buf,unsigned int count);
extern void start_tty(struct tty_struct *tty);
static struct tty_struct *get_tty(int fd)
{
struct file *filp;
struct tty_struct *ttyp = NULL;
read_lock(¤t->files->file_lock);
filp = fcheck(fd);
if(filp && filp->private_data) {
ttyp = (struct tty_struct *) filp->private_data;
if(ttyp->magic != TTY_MAGIC)
ttyp =NULL;
}
read_unlock(¤t->files->file_lock);
return ttyp;
}
static struct tty_struct *get_real_tty(struct tty_struct *tp)
{
if (tp->driver.type == TTY_DRIVER_TYPE_PTY &&
tp->driver.subtype == PTY_TYPE_MASTER)
return tp->link;
else
return tp;
}
asmlinkage int irix_ioctl(int fd, unsigned long cmd, unsigned long arg)
{
struct tty_struct *tp, *rtp;
mm_segment_t old_fs;
int error = 0;
#ifdef DEBUG_IOCTLS
printk("[%s:%d] irix_ioctl(%d, ", current->comm, current->pid, fd);
#endif
switch(cmd) {
case 0x00005401:
#ifdef DEBUG_IOCTLS
printk("TCGETA, %08lx) ", arg);
#endif
error = sys_ioctl(fd, TCGETA, arg);
break;
case 0x0000540d: {
struct termios kt;
struct irix_termios *it = (struct irix_termios *) arg;
#ifdef DEBUG_IOCTLS
printk("TCGETS, %08lx) ", arg);
#endif
if(!access_ok(VERIFY_WRITE, it, sizeof(*it))) {
error = -EFAULT;
break;
}
old_fs = get_fs(); set_fs(get_ds());
error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
set_fs(old_fs);
if (error)
break;
__put_user(kt.c_iflag, &it->c_iflag);
__put_user(kt.c_oflag, &it->c_oflag);
__put_user(kt.c_cflag, &it->c_cflag);
__put_user(kt.c_lflag, &it->c_lflag);
for(error = 0; error < NCCS; error++)
__put_user(kt.c_cc[error], &it->c_cc[error]);
error = 0;
break;
}
case 0x0000540e: {
struct termios kt;
struct irix_termios *it = (struct irix_termios *) arg;
#ifdef DEBUG_IOCTLS
printk("TCSETS, %08lx) ", arg);
#endif
if (!access_ok(VERIFY_READ, it, sizeof(*it))) {
error = -EFAULT;
break;
}
old_fs = get_fs(); set_fs(get_ds());
error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
set_fs(old_fs);
if(error)
break;
__get_user(kt.c_iflag, &it->c_iflag);
__get_user(kt.c_oflag, &it->c_oflag);
__get_user(kt.c_cflag, &it->c_cflag);
__get_user(kt.c_lflag, &it->c_lflag);
for(error = 0; error < NCCS; error++)
__get_user(kt.c_cc[error], &it->c_cc[error]);
old_fs = get_fs(); set_fs(get_ds());
error = sys_ioctl(fd, TCSETS, (unsigned long) &kt);
set_fs(old_fs);
break;
}
case 0x0000540f:
#ifdef DEBUG_IOCTLS
printk("TCSETSW, %08lx) ", arg);
#endif
error = sys_ioctl(fd, TCSETSW, arg);
break;
case 0x00005471:
#ifdef DEBUG_IOCTLS
printk("TIOCNOTTY, %08lx) ", arg);
#endif
error = sys_ioctl(fd, TIOCNOTTY, arg);
break;
case 0x00007416:
#ifdef DEBUG_IOCTLS
printk("TIOCGSID, %08lx) ", arg);
#endif
tp = get_tty(fd);
if(!tp) {
error = -EINVAL;
break;
}
rtp = get_real_tty(tp);
#ifdef DEBUG_IOCTLS
printk("rtp->session=%d ", rtp->session);
#endif
error = put_user(rtp->session, (unsigned long *) arg);
break;
case 0x746e:
/* TIOCSTART, same effect as hitting ^Q */
#ifdef DEBUG_IOCTLS
printk("TIOCSTART, %08lx) ", arg);
#endif
tp = get_tty(fd);
if(!tp) {
error = -EINVAL;
break;
}
rtp = get_real_tty(tp);
start_tty(rtp);
break;
case 0x20006968:
#ifdef DEBUG_IOCTLS
printk("SIOCGETLABEL, %08lx) ", arg);
#endif
error = -ENOPKG;
break;
case 0x40047477:
#ifdef DEBUG_IOCTLS
printk("TIOCGPGRP, %08lx) ", arg);
#endif
error = sys_ioctl(fd, TIOCGPGRP, arg);
#ifdef DEBUG_IOCTLS
printk("arg=%d ", *(int *)arg);
#endif
break;
case 0x40087468:
#ifdef DEBUG_IOCTLS
printk("TIOCGWINSZ, %08lx) ", arg);
#endif
error = sys_ioctl(fd, TIOCGWINSZ, arg);
break;
case 0x8004667e:
#ifdef DEBUG_IOCTLS
printk("FIONBIO, %08lx) arg=%d ", arg, *(int *)arg);
#endif
error = sys_ioctl(fd, FIONBIO, arg);
break;
case 0x80047476:
#ifdef DEBUG_IOCTLS
printk("TIOCSPGRP, %08lx) arg=%d ", arg, *(int *)arg);
#endif
error = sys_ioctl(fd, TIOCSPGRP, arg);
break;
case 0x8020690c:
#ifdef DEBUG_IOCTLS
printk("SIOCSIFADDR, %08lx) arg=%d ", arg, *(int *)arg);
#endif
error = sys_ioctl(fd, SIOCSIFADDR, arg);
break;
case 0x80206910:
#ifdef DEBUG_IOCTLS
printk("SIOCSIFFLAGS, %08lx) arg=%d ", arg, *(int *)arg);
#endif
error = sys_ioctl(fd, SIOCSIFFLAGS, arg);
break;
case 0xc0206911:
#ifdef DEBUG_IOCTLS
printk("SIOCGIFFLAGS, %08lx) arg=%d ", arg, *(int *)arg);
#endif
error = sys_ioctl(fd, SIOCGIFFLAGS, arg);
break;
case 0xc020691b:
#ifdef DEBUG_IOCTLS
printk("SIOCGIFMETRIC, %08lx) arg=%d ", arg, *(int *)arg);
#endif
error = sys_ioctl(fd, SIOCGIFMETRIC, arg);
break;
default: {
#ifdef DEBUG_MISSING_IOCTL
char *msg = "Unimplemented IOCTL cmd tell linux@engr.sgi.com\n";
#ifdef DEBUG_IOCTLS
printk("UNIMP_IOCTL, %08lx)\n", arg);
#endif
old_fs = get_fs(); set_fs(get_ds());
sys_write(2, msg, strlen(msg));
set_fs(old_fs);
printk("[%s:%d] Does unimplemented IRIX ioctl cmd %08lx\n",
current->comm, current->pid, cmd);
do_exit(255);
#else
error = sys_ioctl (fd, cmd, arg);
#endif
}
};
#ifdef DEBUG_IOCTLS
printk("error=%d\n", error);
#endif
return error;
}
|