1.\" $NetBSD: mknod.2,v 1.18 2004/05/13 10:20:58 wiz Exp $ 2.\" 3.\" Copyright (c) 1980, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)mknod.2 8.1 (Berkeley) 6/4/93 31.\" 32.Dd June 4, 1993 33.Dt MKNOD 2 34.Os 35.Sh NAME 36.Nm mknod 37.Nd make a special file node 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In sys/stat.h 42.Ft int 43.Fn mknod "const char *path" "mode_t mode" "dev_t dev" 44.Sh DESCRIPTION 45The device special file 46.Fa path 47is created with the major and minor 48device numbers extracted from 49.Fa mode . 50The access permissions of 51.Fa path 52are descendant from the 53.Xr umask 2 54of the parent process. 55.Pp 56If 57.Fa mode 58indicates a block or character special file, 59.Fa dev 60is a configuration dependent specification of a character or block 61I/O device and the superblock of the device. 62If 63.Fa mode 64does not indicate a block special or character special device, 65.Fa dev 66is ignored. 67.Pp 68.Fn mknod 69requires super-user privileges. 70.Sh RETURN VALUES 71Upon successful completion a value of 0 is returned. 72Otherwise, a value of \-1 is returned and 73.Va errno 74is set to indicate the error. 75.Sh ERRORS 76.Fn mknod 77will fail and the file will be not created if: 78.Bl -tag -width Er 79.It Bq Er ENOTDIR 80A component of the path prefix is not a directory. 81.It Bq Er ENAMETOOLONG 82A component of a pathname exceeded 83.Dv {NAME_MAX} 84characters, or an entire path name exceeded 85.Dv {PATH_MAX} 86characters. 87.It Bq Er ENOENT 88A component of the path prefix does not exist. 89.It Bq Er EACCES 90Search permission is denied for a component of the path prefix. 91.It Bq Er ELOOP 92Too many symbolic links were encountered in translating the pathname. 93.It Bq Er EPERM 94The process's effective user ID is not super-user. 95.It Bq Er EIO 96An I/O error occurred while making the directory entry or allocating the inode. 97.It Bq Er ENOSPC 98The directory in which the entry for the new node is being placed 99cannot be extended because there is no space left on the file 100system containing the directory. 101.It Bq Er ENOSPC 102There are no free inodes on the file system on which the 103node is being created. 104.It Bq Er EDQUOT 105The directory in which the entry for the new node 106is being placed cannot be extended because the 107user's quota of disk blocks on the file system 108containing the directory has been exhausted. 109.It Bq Er EDQUOT 110The user's quota of inodes on the file system on 111which the node is being created has been exhausted. 112.It Bq Er EROFS 113The named file resides on a read-only file system. 114.It Bq Er EEXIST 115The named file exists. 116.It Bq Er EFAULT 117.Fa path 118points outside the process's allocated address space. 119.El 120.Sh SEE ALSO 121.Xr chmod 2 , 122.Xr stat 2 , 123.Xr umask 2 124.Sh HISTORY 125A 126.Fn mknod 127function call appeared in 128.At v6 . 129