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