111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/* $NetBSD: irix_mount.c,v 1.9 2005/02/26 23:10:18 perry Exp $ */
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/*-
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* Copyright (c) 2001 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_mount.c,v 1.9 2005/02/26 23:10:18 perry Exp $");
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#include <sys/types.h>
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#include <sys/signal.h>
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/vnode_if.h>
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#include <compat/common/compat_util.h>
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#include <compat/irix/irix_types.h>
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#include <compat/irix/irix_signal.h>
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#include <compat/irix/irix_syscall.h>
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#include <compat/irix/irix_syscallargs.h>
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int
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irix_sys_getmountid(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct irix_sys_getmountid_args /* {
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syscallarg(const char *) path;
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syscallarg(irix_mountid_t *) buf;
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} */ *uap = v;
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struct proc *p = l->l_proc;
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caddr_t sg = stackgap_init(p, 0);
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struct ucred *cred;
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struct vnode *vp;
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int error = 0;
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struct nameidata nd;
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irix_mountid_t mountid;
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void *addr;
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CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
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cred = crdup(p->p_ucred);
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cred->cr_uid = p->p_cred->p_ruid;
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cred->cr_gid = p->p_cred->p_rgid;
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/* Get the vnode for the requested path */
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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SCARG(uap, path), p);
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nd.ni_cnd.cn_cred = cred;
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if ((error = namei(&nd)) != 0)
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goto out;
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vp = nd.ni_vp;
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/* Check for accessibility */
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if ((error = VOP_ACCESS(vp, VREAD | VEXEC, cred, p)) != 0)
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goto bad;
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/*
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* Return the address of the mount structure
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* as the unique ID for the filesystem
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*/
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addr = (void *)&vp->v_mount;
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bzero((void *)&mountid, sizeof(mountid));
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(void)memcpy((void *)&mountid, &addr, sizeof(addr));
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error = copyout(&mountid, SCARG(uap, buf), sizeof(mountid));
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bad:
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vput(vp);
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out:
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crfree(cred);
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return (error);
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}
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