NetBSD/sys/compat/irix/irix_ioctl.c

154 lines
4.9 KiB
C

/* $NetBSD: irix_ioctl.c,v 1.2 2002/05/22 05:14:01 manu Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emmanuel Dreyfus
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: irix_ioctl.c,v 1.2 2002/05/22 05:14:01 manu Exp $");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/file.h>
#include <sys/filio.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/vnode.h>
#include <sys/types.h>
#include <sys/syscallargs.h>
#include <miscfs/specfs/specdev.h>
#include <compat/common/compat_util.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_lwp.h>
#include <compat/svr4/svr4_ucontext.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_syscall.h>
#include <compat/svr4/svr4_syscallargs.h>
#include <compat/irix/irix_ioctl.h>
#include <compat/irix/irix_usema.h>
#include <compat/irix/irix_signal.h>
#include <compat/irix/irix_types.h>
#include <compat/irix/irix_exec.h>
#include <compat/irix/irix_syscallargs.h>
int
irix_sys_ioctl(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct irix_sys_ioctl_args /* {
syscallarg(int) fd;
syscallarg(u_long) com;
syscallarg(caddr_t) data;
} */ *uap = v;
u_long cmd;
caddr_t data;
struct file *fp;
struct filedesc *fdp;
struct vnode *vp;
struct irix_ioctl_usrdata iiu;
struct irix_ioctl_usrdata *iiup;
caddr_t sg = stackgap_init(p, 0);
int error;
/*
* This duplicates 6 lines from svr4_sys_ioctl()
* It would be nice to merge it.
*/
fdp = p->p_fd;
cmd = SCARG(uap, com);
data = SCARG(uap, data);
if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
return EBADF;
if ((fp->f_flag & (FREAD | FWRITE)) == 0)
return EBADF;
/*
* A special hook for /dev/usemaclone ioctls. Some of the ioctl
* commands need to set the return value, which is normally
* impossible in the file methods and lower. We do the job by
* copying the retval address and the data argument to a
* struct irix_ioctl_usrdata in the stackgap. The data argument
* is set to the address of the structure, and the underlying
* code will be able to retreive both data and the retval address
* by fecthing the struct irix_ioctl_usrdata.
*
* We also bypass the checks in sys_ioctl() because theses ioctl
* are defined _IO but really are _IOR. XXX need security review.
*/
if ((cmd & IRIX_UIOC_MASK) == IRIX_UIOC) {
FILE_USE(fp);
vp = (struct vnode*)fp->f_data;
if (vp->v_type != VCHR || vp->v_rdev != irix_usemaclonedev) {
error = ENOTTY;
goto out;
}
iiup = stackgap_alloc(p, &sg, sizeof(iiu));
iiu.iiu_data = data;
iiu.iiu_retval = retval;
data = (caddr_t)iiup;
if ((error = copyout(&iiu, iiup, sizeof(iiu))) != 0)
goto out;
error = (*fp->f_ops->fo_ioctl)(fp, cmd, data, p);
out:
FILE_UNUSE(fp, p);
return error;
}
switch (cmd) {
case IRIX_SIOCNREAD: /* number of bytes to read */
return (*(fp->f_ops->fo_ioctl))(fp, FIONREAD,
SCARG(uap, data), p);
break;
default: /* Fallback to the standard SVR4 ioctl's */
error = svr4_sys_ioctl(p, v, retval);
break;
}
return error;
}