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 (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved. 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 #include <sys/param.h> 35 #include <sys/isa_defs.h> 36 #include <sys/types.h> 37 #include <sys/sysmacros.h> 38 #include <sys/user.h> 39 #include <sys/systm.h> 40 #include <sys/errno.h> 41 #include <sys/stat.h> 42 #include <sys/vnode.h> 43 #include <sys/file.h> 44 #include <sys/fcntl.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 #include <c2/audit.h> 51 52 /* 53 * Create a special file, a regular file, or a FIFO. 54 * fname - pathname passed by user 55 * fmode - mode of pathname 56 * dev = device number - b/c specials only 57 */ 58 int 59 mknodat(int fd, char *fname, mode_t fmode, dev_t dev) 60 { 61 vnode_t *startvp; 62 vnode_t *vp; 63 struct vattr vattr; 64 int error; 65 enum create why; 66 67 /* 68 * Zero type is equivalent to a regular file. 69 */ 70 if ((fmode & S_IFMT) == 0) 71 fmode |= S_IFREG; 72 73 /* 74 * Must be privileged unless making a FIFO node. 75 */ 76 if (((fmode & S_IFMT) != S_IFIFO) && secpolicy_sys_devices(CRED()) != 0) 77 return (set_errno(EPERM)); 78 /* 79 * Set up desired attributes and vn_create the file. 80 */ 81 vattr.va_type = IFTOVT(fmode); 82 vattr.va_mode = fmode & MODEMASK; 83 vattr.va_mask = AT_TYPE|AT_MODE; 84 if (vattr.va_type == VCHR || vattr.va_type == VBLK) { 85 if (get_udatamodel() != DATAMODEL_NATIVE) 86 dev = expldev(dev); 87 if (dev == NODEV || (getemajor(dev)) == (major_t)NODEV) 88 return (set_errno(EINVAL)); 89 vattr.va_rdev = dev; 90 vattr.va_mask |= AT_RDEV; 91 } 92 93 if (fname == NULL) 94 return (set_errno(EFAULT)); 95 if ((error = fgetstartvp(fd, fname, &startvp)) != 0) 96 return (set_errno(error)); 97 if (AU_AUDITING() && startvp != NULL) 98 audit_setfsat_path(1); 99 100 why = ((fmode & S_IFMT) == S_IFDIR) ? CRMKDIR : CRMKNOD; 101 error = vn_createat(fname, UIO_USERSPACE, &vattr, EXCL, 0, &vp, 102 why, 0, PTOU(curproc)->u_cmask, startvp); 103 if (startvp != NULL) 104 VN_RELE(startvp); 105 if (error) 106 return (set_errno(error)); 107 VN_RELE(vp); 108 return (0); 109 } 110 111 int 112 mknod(char *fname, mode_t fmode, dev_t dev) 113 { 114 return (mknodat(AT_FDCWD, fname, fmode, dev)); 115 } 116