NetBSD/sys/compat/irix/irix_mount.c

111 lines
3.6 KiB
C

/* $NetBSD: irix_mount.c,v 1.4 2002/03/16 20:43:52 christos Exp $ */
/*-
* Copyright (c) 2001 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_mount.c,v 1.4 2002/03/16 20:43:52 christos Exp $");
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/vnode_if.h>
#include <compat/common/compat_util.h>
#include <compat/irix/irix_types.h>
#include <compat/irix/irix_signal.h>
#include <compat/irix/irix_syscall.h>
#include <compat/irix/irix_syscallargs.h>
int
irix_sys_getmountid(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct irix_sys_getmountid_args /* {
syscallarg(const char *) path;
syscallarg(irix_mountid_t *) buf;
} */ *uap = v;
caddr_t sg = stackgap_init(p, 0);
struct ucred *cred = crget();
struct vnode *vp;
int error = 0;
struct nameidata nd;
irix_mountid_t mountid;
void *addr;
CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
(void)memcpy(cred, p->p_ucred, sizeof(*cred));
cred->cr_ref = 1;
cred->cr_uid = p->p_cred->p_ruid;
cred->cr_gid = p->p_cred->p_rgid;
/* Get the vnode for the requested path */
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
nd.ni_cnd.cn_cred = cred;
if ((error = namei(&nd)) != 0)
goto out;
vp = nd.ni_vp;
/* Check for accessibility */
if ((error = VOP_ACCESS(vp, VREAD | VEXEC, cred, p)) != 0)
goto bad;
/*
* Return the address of the mount structure
* as the unique ID for the filesystem
*/
addr = (void *)&vp->v_mount;
bzero((void *)&mountid, sizeof(mountid));
(void)memcpy((void *)&mountid, &addr, sizeof(addr));
error = copyout(&mountid, SCARG(uap, buf), sizeof(mountid));
bad:
vput(vp);
out:
crfree(cred);
return (error);
}