1.\" $NetBSD: mknod.2,v 1.13 2002/02/08 01:28:19 ross 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. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)mknod.2 8.1 (Berkeley) 6/4/93 35.\" 36.Dd June 4, 1993 37.Dt MKNOD 2 38.Os 39.Sh NAME 40.Nm mknod 41.Nd make a special file node 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.Fd #include \*[Lt]sys/stat.h\*[Gt] 46.Ft int 47.Fn mknod "const char *path" "mode_t mode" "dev_t dev" 48.Sh DESCRIPTION 49The device special file 50.Fa path 51is created with the major and minor 52device numbers extracted from 53.Fa mode . 54The access permissions of 55.Fa path 56are descendant from the 57.Xr umask 2 58of the parent process. 59.Pp 60If 61.Fa mode 62indicates a block or character special file, 63.Fa dev 64is a configuration dependent specification of a character or block 65I/O device and the superblock of the device. If 66.Fa mode 67does not indicate a block special or character special device, 68.Fa dev 69is ignored. 70.Pp 71.Fn mknod 72requires super-user privileges. 73.Sh RETURN VALUES 74Upon successful completion a value of 0 is returned. 75Otherwise, a value of -1 is returned and 76.Va errno 77is set to indicate the error. 78.Sh ERRORS 79.Fn mknod 80will fail and the file will be not created if: 81.Bl -tag -width Er 82.It Bq Er ENOTDIR 83A component of the path prefix is not a directory. 84.It Bq Er ENAMETOOLONG 85A component of a pathname exceeded 86.Dv {NAME_MAX} 87characters, or an entire path name exceeded 88.Dv {PATH_MAX} 89characters. 90.It Bq Er ENOENT 91A component of the path prefix does not exist. 92.It Bq Er EACCES 93Search permission is denied for a component of the path prefix. 94.It Bq Er ELOOP 95Too many symbolic links were encountered in translating the pathname. 96.It Bq Er EPERM 97The process's effective user ID is not super-user. 98.It Bq Er EIO 99An I/O error occurred while making the directory entry or allocating the inode. 100.It Bq Er ENOSPC 101The directory in which the entry for the new node is being placed 102cannot be extended because there is no space left on the file 103system containing the directory. 104.It Bq Er ENOSPC 105There are no free inodes on the file system on which the 106node is being created. 107.It Bq Er EDQUOT 108The directory in which the entry for the new node 109is being placed cannot be extended because the 110user's quota of disk blocks on the file system 111containing the directory has been exhausted. 112.It Bq Er EDQUOT 113The user's quota of inodes on the file system on 114which the node is being created has been exhausted. 115.It Bq Er EROFS 116The named file resides on a read-only file system. 117.It Bq Er EEXIST 118The named file exists. 119.It Bq Er EFAULT 120.Fa path 121points outside the process's allocated address space. 122.El 123.Sh SEE ALSO 124.Xr chmod 2 , 125.Xr stat 2 , 126.Xr umask 2 127.Sh HISTORY 128A 129.Fn mknod 130function call appeared in 131.At v6 . 132