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 /* 23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/isa_defs.h> 37 #include <sys/types.h> 38 #include <sys/sysmacros.h> 39 #include <sys/user.h> 40 #include <sys/systm.h> 41 #include <sys/errno.h> 42 #include <sys/stat.h> 43 #include <sys/vnode.h> 44 #include <sys/mode.h> 45 #include <sys/uio.h> 46 #include <sys/mkdev.h> 47 #include <sys/policy.h> 48 #include <sys/debug.h> 49 50 /* 51 * Create a special file, a regular file, or a FIFO. 52 * fname - pathname passed by user 53 * fmode - mode of pathname 54 * dev = device number - b/c specials only 55 */ 56 int 57 mknod(char *fname, mode_t fmode, dev_t dev) 58 { 59 vnode_t *vp; 60 struct vattr vattr; 61 int error; 62 enum create why; 63 64 /* 65 * Zero type is equivalent to a regular file. 66 */ 67 if ((fmode & S_IFMT) == 0) 68 fmode |= S_IFREG; 69 70 /* 71 * Must be privileged unless making a FIFO node. 72 */ 73 if (((fmode & S_IFMT) != S_IFIFO) && secpolicy_sys_devices(CRED()) != 0) 74 return (set_errno(EPERM)); 75 /* 76 * Set up desired attributes and vn_create the file. 77 */ 78 vattr.va_type = IFTOVT(fmode); 79 vattr.va_mode = fmode & MODEMASK; 80 vattr.va_mask = AT_TYPE|AT_MODE; 81 if (vattr.va_type == VCHR || vattr.va_type == VBLK) { 82 if (get_udatamodel() != DATAMODEL_NATIVE) 83 dev = expldev(dev); 84 if (dev == NODEV || (getemajor(dev)) == (major_t)NODEV) 85 return (set_errno(EINVAL)); 86 vattr.va_rdev = dev; 87 vattr.va_mask |= AT_RDEV; 88 } 89 why = ((fmode & S_IFMT) == S_IFDIR) ? CRMKDIR : CRMKNOD; 90 if (error = vn_create(fname, UIO_USERSPACE, &vattr, EXCL, 0, &vp, 91 why, 0, PTOU(curproc)->u_cmask)) 92 return (set_errno(error)); 93 VN_RELE(vp); 94 return (0); 95 } 96