1.\" Copyright (c) 1980, 1991 Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)mknod.2 6.5 (Berkeley) 3/10/91 33.\" $Id: mknod.2,v 1.3 1993/11/25 00:39:18 jtc Exp $ 34.\" 35.Dd March 10, 1991 36.Dt MKNOD 2 37.Os BSD 4 38.Sh NAME 39.Nm mknod 40.Nd make a special file node 41.Sh SYNOPSIS 42.Fd #include <unistd.h> 43.Ft int 44.Fn mknod "const char *path" "mode_t mode" "dev_t dev" 45.Sh DESCRIPTION 46The device special file 47.Fa path 48is created with the major and minor 49device numbers extracted from 50.Fa mode. 51The access permissions of 52.Fa path 53are descendant from the 54.Xr umask 2 55of the parent process. 56.Pp 57If 58.Fa mode 59indicates a block or character special file, 60.Fa dev 61is a configuration dependent specification of a character or block 62I/O device and the superblock of the device. If 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 EINVAL 82The pathname contains a character with the high-order bit set. 83.It Bq Er ENAMETOOLONG 84A component of a pathname exceeded 255 characters, 85or an entire path name exceeded 1023 characters. 86.It Bq Er ENOENT 87A component of the path prefix does not exist. 88.It Bq Er EACCES 89Search permission is denied for a component of the path prefix. 90.It Bq Er ELOOP 91Too many symbolic links were encountered in translating the pathname. 92.It Bq Er EPERM 93The process's effective user ID is not super-user. 94.It Bq Er EPERM 95The pathname contains a character with the high-order bit set. 96.It Bq Er EIO 97An I/O error occurred while making the directory entry or allocating the inode. 98.It Bq Er ENOSPC 99The directory in which the entry for the new node is being placed 100cannot be extended because there is no space left on the file 101system containing the directory. 102.It Bq Er ENOSPC 103There are no free inodes on the file system on which the 104node is being created. 105.It Bq Er EDQUOT 106The directory in which the entry for the new node 107is being placed cannot be extended because the 108user's quota of disk blocks on the file system 109containing the directory has been exhausted. 110.It Bq Er EDQUOT 111The user's quota of inodes on the file system on 112which the node is being created has been exhausted. 113.It Bq Er EROFS 114The named file resides on a read-only file system. 115.It Bq Er EEXIST 116The named file exists. 117.It Bq Er EFAULT 118.Fa Path 119points outside the process's allocated address space. 120.El 121.Sh SEE ALSO 122.Xr chmod 2 , 123.Xr stat 2 , 124.Xr umask 2 125.Sh HISTORY 126A 127.Fn mknod 128function call appeared in 129.At v6 . 130