1.\" $NetBSD: mknod.2,v 1.21 2011/07/03 14:11:43 jruoho 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 ENOTDIR 70A component of the path prefix is not a directory. 71.It Bq Er ENAMETOOLONG 72A component of a pathname exceeded 73.Brq Dv NAME_MAX 74characters, or an entire path name exceeded 75.Brq Dv PATH_MAX 76characters. 77.It Bq Er ENOENT 78A component of the path prefix does not exist. 79.It Bq Er EACCES 80Search permission is denied for a component of the path prefix. 81.It Bq Er EINVAL 82The supplied 83.Fa mode 84or 85.Fa dev 86is invalid. 87.It Bq Er ELOOP 88Too many symbolic links were encountered in translating the pathname. 89.It Bq Er EPERM 90The process's effective user ID is not super-user. 91.It Bq Er EIO 92An I/O error occurred while making the directory entry or allocating the inode. 93.It Bq Er ENOSPC 94The directory in which the entry for the new node is being placed 95cannot be extended because there is no space left on the file 96system containing the directory. 97.It Bq Er ENOSPC 98There are no free inodes on the file system on which the 99node is being created. 100.It Bq Er EDQUOT 101The directory in which the entry for the new node 102is being placed cannot be extended because the 103user's quota of disk blocks on the file system 104containing the directory has been exhausted. 105.It Bq Er EDQUOT 106The user's quota of inodes on the file system on 107which the node is being created has been exhausted. 108.It Bq Er EROFS 109The named file resides on a read-only file system. 110.It Bq Er EEXIST 111The named file exists. 112.It Bq Er EFAULT 113.Fa path 114points outside the process's allocated address space. 115.El 116.Sh SEE ALSO 117.Xr chmod 2 , 118.Xr mkfifo 2 , 119.Xr stat 2 , 120.Xr umask 2 121.Sh HISTORY 122A 123.Fn mknod 124function call appeared in 125.At v6 . 126