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high-order bit set", as this error is obsolete. Eventually we may want to add code to some of the "optional" filesystems (msdosfs, etc.) that checks for illegal characters. At that time it would be appropriate to reintroduce this error with appropriate text. Perhaps "The pathname contains a character that is not valid for filesystem type".
129 lines
4.3 KiB
Groff
129 lines
4.3 KiB
Groff
.\" Copyright (c) 1980, 1991 Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)mknod.2 6.5 (Berkeley) 3/10/91
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.\" $Id: mknod.2,v 1.5 1994/04/22 00:13:40 jtc Exp $
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.\"
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.Dd March 10, 1991
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.Dt MKNOD 2
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.Os BSD 4
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.Sh NAME
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.Nm mknod
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.Nd make a special file node
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.Sh SYNOPSIS
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.Fd #include <unistd.h>
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.Ft int
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.Fn mknod "const char *path" "mode_t mode" "dev_t dev"
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.Sh DESCRIPTION
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The device special file
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.Fa path
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is created with the major and minor
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device numbers extracted from
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.Fa mode.
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The access permissions of
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.Fa path
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are descendant from the
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.Xr umask 2
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of the parent process.
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.Pp
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If
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.Fa mode
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indicates a block or character special file,
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.Fa dev
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is a configuration dependent specification of a character or block
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I/O device and the superblock of the device. If
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.Fa mode
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does not indicate a block special or character special device,
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.Fa dev
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is ignored.
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.Pp
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.Fn Mknod
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requires super-user privileges.
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.Sh RETURN VALUES
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Upon successful completion a value of 0 is returned.
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Otherwise, a value of -1 is returned and
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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.Fn Mknod
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will fail and the file will be not created if:
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.Bl -tag -width Er
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.It Bq Er ENOTDIR
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A component of the path prefix is not a directory.
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.It Bq Er ENAMETOOLONG
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A component of a pathname exceeded
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.Dv {NAME_MAX}
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characters, or an entire path name exceeded
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.Dv {PATH_MAX}
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characters.
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.It Bq Er ENOENT
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A component of the path prefix does not exist.
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.It Bq Er EACCES
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Search permission is denied for a component of the path prefix.
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.It Bq Er ELOOP
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Too many symbolic links were encountered in translating the pathname.
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.It Bq Er EPERM
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The process's effective user ID is not super-user.
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.It Bq Er EIO
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An I/O error occurred while making the directory entry or allocating the inode.
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.It Bq Er ENOSPC
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The directory in which the entry for the new node is being placed
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cannot be extended because there is no space left on the file
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system containing the directory.
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.It Bq Er ENOSPC
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There are no free inodes on the file system on which the
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node is being created.
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.It Bq Er EDQUOT
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The directory in which the entry for the new node
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is being placed cannot be extended because the
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user's quota of disk blocks on the file system
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containing the directory has been exhausted.
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.It Bq Er EDQUOT
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The user's quota of inodes on the file system on
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which the node is being created has been exhausted.
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.It Bq Er EROFS
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The named file resides on a read-only file system.
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.It Bq Er EEXIST
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The named file exists.
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.It Bq Er EFAULT
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.Fa Path
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points outside the process's allocated address space.
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.El
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.Sh SEE ALSO
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.Xr chmod 2 ,
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.Xr stat 2 ,
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.Xr umask 2
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.Sh HISTORY
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A
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.Fn mknod
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function call appeared in
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.At v6 .
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