common/syscall/mknod.c

	mknod.c revision ae115bc77f6fcde83175c75b4206dc2e50747966
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/param.h>
#include <sys/isa_defs.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/user.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mode.h>
#include <sys/uio.h>
#include <sys/mkdev.h>
#include <sys/policy.h>
#include <sys/debug.h>

/*
 * Create a special file, a regular file, or a FIFO.
 * fname - pathname passed by user
 * fmode - mode of pathname
 * dev = device number - b/c specials only
 */
int
mknod(char *fname, mode_t fmode, dev_t dev)
{
    vnode_t *vp;
    struct vattr vattr;
    int error;
    enum create why;

    /*
     * Zero type is equivalent to a regular file.
     */
    if ((fmode & S_IFMT) == 0)
        fmode |= S_IFREG;

    /*
     * Must be privileged unless making a FIFO node.
     */
    if (((fmode & S_IFMT) != S_IFIFO) && secpolicy_sys_devices(CRED()) != 0)
        return (set_errno(EPERM));
    /*
     * Set up desired attributes and vn_create the file.
     */
    vattr.va_type = IFTOVT(fmode);
    vattr.va_mode = fmode & MODEMASK;
    vattr.va_mask = AT_TYPE|AT_MODE;
    if (vattr.va_type == VCHR || vattr.va_type == VBLK) {
        if (get_udatamodel() != DATAMODEL_NATIVE)
            dev = expldev(dev);
        if (dev == NODEV || (getemajor(dev)) == (major_t)NODEV)
            return (set_errno(EINVAL));
        vattr.va_rdev = dev;
        vattr.va_mask |= AT_RDEV;
    }
    why = ((fmode & S_IFMT) == S_IFDIR) ? CRMKDIR : CRMKNOD;
    if (error = vn_create(fname, UIO_USERSPACE, &vattr, EXCL, 0, &vp,
        why, 0,  PTOU(curproc)->u_cmask))
        return (set_errno(error));
    VN_RELE(vp);
    return (0);
}

#if defined(__i386) || defined(__i386_COMPAT)

/*ARGSUSED*/
int
xmknod(int version, char *fname, mode_t fmode, dev_t dev)
{
    return (mknod(fname, fmode, dev));
}

#endif