1.\" $NetBSD: mknod.2,v 1.6 1995/02/27 12:34:33 cgd 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 BSD 4 39.Sh NAME 40.Nm mknod 41.Nd make a special file node 42.Sh SYNOPSIS 43.Fd #include <unistd.h> 44.Ft int 45.Fn mknod "const char *path" "mode_t mode" "dev_t dev" 46.Sh DESCRIPTION 47The device special file 48.Fa path 49is created with the major and minor 50device numbers extracted from 51.Fa mode. 52The access permissions of 53.Fa path 54are descendant from the 55.Xr umask 2 56of the parent process. 57.Pp 58If 59.Fa mode 60indicates a block or character special file, 61.Fa dev 62is a configuration dependent specification of a character or block 63I/O device and the superblock of the device. If 64.Fa mode 65does not indicate a block special or character special device, 66.Fa dev 67is ignored. 68.Pp 69.Fn Mknod 70requires super-user privileges. 71.Sh RETURN VALUES 72Upon successful completion a value of 0 is returned. 73Otherwise, a value of -1 is returned and 74.Va errno 75is set to indicate the error. 76.Sh ERRORS 77.Fn Mknod 78will fail and the file will be not created if: 79.Bl -tag -width Er 80.It Bq Er ENOTDIR 81A component of the path prefix is not a directory. 82.It Bq Er ENAMETOOLONG 83A component of a pathname exceeded 84.Dv {NAME_MAX} 85characters, or an entire path name exceeded 86.Dv {PATH_MAX} 87characters. 88.It Bq Er ENOENT 89A component of the path prefix does not exist. 90.It Bq Er EACCES 91Search permission is denied for a component of the path prefix. 92.It Bq Er ELOOP 93Too many symbolic links were encountered in translating the pathname. 94.It Bq Er EPERM 95The process's effective user ID is not super-user. 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