1.\" $NetBSD: mknod.2,v 1.22 2011/07/08 19:25:51 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 July 3, 2011 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 specified by 49.Fa dev . 50The access permissions of 51.Fa path 52are extracted from 53.Fa mode , 54modified by the 55.Xr umask 2 56of the parent process. 57.Pp 58.Fn mknod 59requires super-user privileges. 60.Sh RETURN VALUES 61Upon successful completion a value of 0 is returned. 62Otherwise, a value of \-1 is returned and 63.Va errno 64is set to indicate the error. 65.Sh ERRORS 66.Fn mknod 67will fail and the file will be not created if: 68.Bl -tag -width Er 69.It Bq Er EACCES 70Search permission is denied for a component of the path prefix. 71.It Bq Er EDQUOT 72The directory in which the entry for the new node 73is being placed cannot be extended because the 74user's quota of disk blocks on the file system 75containing the directory has been exhausted; or 76the user's quota of inodes on the file system on 77which the node is being created has been exhausted. 78.It Bq Er EEXIST 79The named file exists. 80.It Bq Er EFAULT 81.Fa path 82points outside the process's allocated address space. 83.It Bq Er EINVAL 84The supplied 85.Fa mode 86or 87.Fa dev 88is invalid. 89.It Bq Er EIO 90An I/O error occurred while making the directory entry or allocating the inode. 91.It Bq Er ELOOP 92Too many symbolic links were encountered in translating the pathname. 93.It Bq Er ENAMETOOLONG 94A component of a pathname exceeded 95.Brq Dv NAME_MAX 96characters, or an entire path name exceeded 97.Brq Dv PATH_MAX 98characters. 99.It Bq Er ENOENT 100A component of the path prefix does not exist. 101.It Bq Er ENOSPC 102The directory in which the entry for the new node is being placed 103cannot be extended because there is no space left on the file 104system containing the directory; or 105there are no free inodes on the file system on which the 106node is being created. 107.It Bq Er ENOTDIR 108A component of the path prefix is not a directory. 109.It Bq Er EPERM 110The process's effective user ID is not super-user. 111.It Bq Er EROFS 112The named file resides on a read-only file system. 113.El 114.Sh SEE ALSO 115.Xr chmod 2 , 116.Xr mkfifo 2 , 117.Xr stat 2 , 118.Xr umask 2 119.Sh HISTORY 120A 121.Fn mknod 122function call appeared in 123.At v6 . 124