Home | History | Annotate | Download | only in syscall
      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
     27 /*	  All Rights Reserved  	*/
     28 
     29 /*
     30  * Portions of this source code were derived from Berkeley 4.3 BSD
     31  * under license from the Regents of the University of California.
     32  */
     33 
     34 #pragma ident	"@(#)mknod.c	1.12	07/01/10 SMI"
     35 
     36 #include <sys/param.h>
     37 #include <sys/isa_defs.h>
     38 #include <sys/types.h>
     39 #include <sys/sysmacros.h>
     40 #include <sys/user.h>
     41 #include <sys/systm.h>
     42 #include <sys/errno.h>
     43 #include <sys/stat.h>
     44 #include <sys/vnode.h>
     45 #include <sys/mode.h>
     46 #include <sys/uio.h>
     47 #include <sys/mkdev.h>
     48 #include <sys/policy.h>
     49 #include <sys/debug.h>
     50 
     51 /*
     52  * Create a special file, a regular file, or a FIFO.
     53  * fname - pathname passed by user
     54  * fmode - mode of pathname
     55  * dev = device number - b/c specials only
     56  */
     57 int
     58 mknod(char *fname, mode_t fmode, dev_t dev)
     59 {
     60 	vnode_t *vp;
     61 	struct vattr vattr;
     62 	int error;
     63 	enum create why;
     64 
     65 	/*
     66 	 * Zero type is equivalent to a regular file.
     67 	 */
     68 	if ((fmode & S_IFMT) == 0)
     69 		fmode |= S_IFREG;
     70 
     71 	/*
     72 	 * Must be privileged unless making a FIFO node.
     73 	 */
     74 	if (((fmode & S_IFMT) != S_IFIFO) && secpolicy_sys_devices(CRED()) != 0)
     75 		return (set_errno(EPERM));
     76 	/*
     77 	 * Set up desired attributes and vn_create the file.
     78 	 */
     79 	vattr.va_type = IFTOVT(fmode);
     80 	vattr.va_mode = fmode & MODEMASK;
     81 	vattr.va_mask = AT_TYPE|AT_MODE;
     82 	if (vattr.va_type == VCHR || vattr.va_type == VBLK) {
     83 		if (get_udatamodel() != DATAMODEL_NATIVE)
     84 			dev = expldev(dev);
     85 		if (dev == NODEV || (getemajor(dev)) == (major_t)NODEV)
     86 			return (set_errno(EINVAL));
     87 		vattr.va_rdev = dev;
     88 		vattr.va_mask |= AT_RDEV;
     89 	}
     90 	why = ((fmode & S_IFMT) == S_IFDIR) ? CRMKDIR : CRMKNOD;
     91 	if (error = vn_create(fname, UIO_USERSPACE, &vattr, EXCL, 0, &vp,
     92 	    why, 0,  PTOU(curproc)->u_cmask))
     93 		return (set_errno(error));
     94 	VN_RELE(vp);
     95 	return (0);
     96 }
     97 
     98 #if defined(__i386) || defined(__i386_COMPAT)
     99 
    100 /*ARGSUSED*/
    101 int
    102 xmknod(int version, char *fname, mode_t fmode, dev_t dev)
    103 {
    104 	return (mknod(fname, fmode, dev));
    105 }
    106 
    107 #endif
    108