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-.\" Copyright (c) 1980, 1991, 1993
-.\" The Regents of the University of California. All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" @(#)mknod.2 8.1 (Berkeley) 6/4/93
-.\" $FreeBSD$
-.\"
-.Dd March 30, 2020
-.Dt MKNOD 2
-.Os
-.Sh NAME
-.Nm mknod ,
-.Nm mknodat
-.Nd make a special file node
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In sys/stat.h
-.Ft int
-.Fn mknod "const char *path" "mode_t mode" "dev_t dev"
-.Ft int
-.Fn mknodat "int fd" "const char *path" "mode_t mode" "dev_t dev"
-.Sh DESCRIPTION
-The file system node
-.Fa path
-is created with the file type and access permissions specified in
-.Fa mode .
-The access permissions are modified by the process's umask value.
-.Pp
-If
-.Fa mode
-indicates a block or character special file,
-.Fa dev
-is a configuration dependent specification denoting a particular device
-on the system.
-Otherwise,
-.Fa dev
-is ignored.
-.Pp
-The
-.Fn mknod
-system call
-requires super-user privileges.
-.Pp
-The
-.Fn mknodat
-system call is equivalent to
-.Fn mknod
-except in the case where
-.Fa path
-specifies a relative path.
-In this case the newly created device node is created relative to the
-directory associated with the file descriptor
-.Fa fd
-instead of the current working directory.
-If
-.Fn mknodat
-is passed the special value
-.Dv AT_FDCWD
-in the
-.Fa fd
-parameter, the current working directory is used and the behavior is
-identical to a call to
-.Fn mknod .
-.Sh RETURN VALUES
-.Rv -std mknod
-.Sh ERRORS
-The
-.Fn mknod
-system call
-will fail and the file will be not created if:
-.Bl -tag -width Er
-.It Bq Er ENOTDIR
-A component of the path prefix is not a directory.
-.It Bq Er ENAMETOOLONG
-A component of a pathname exceeded 255 characters,
-or an entire path name exceeded 1023 characters.
-.It Bq Er ENOENT
-A component of the path prefix does not exist.
-.It Bq Er EACCES
-Search permission is denied for a component of the path prefix.
-.It Bq Er ELOOP
-Too many symbolic links were encountered in translating the pathname.
-.It Bq Er EPERM
-The process's effective user ID is not super-user.
-.It Bq Er EIO
-An I/O error occurred while making the directory entry or allocating the inode.
-.It Bq Er EINTEGRITY
-Corrupted data was detected while reading from the file system.
-.It Bq Er ENOSPC
-The directory in which the entry for the new node is being placed
-cannot be extended because there is no space left on the file
-system containing the directory.
-.It Bq Er ENOSPC
-There are no free inodes on the file system on which the
-node is being created.
-.It Bq Er EDQUOT
-The directory in which the entry for the new node
-is being placed cannot be extended because the
-user's quota of disk blocks on the file system
-containing the directory has been exhausted.
-.It Bq Er EDQUOT
-The user's quota of inodes on the file system on
-which the node is being created has been exhausted.
-.It Bq Er EROFS
-The named file resides on a read-only file system.
-.It Bq Er EEXIST
-The named file exists.
-.It Bq Er EFAULT
-The
-.Fa path
-argument
-points outside the process's allocated address space.
-.It Bq Er EINVAL
-Creating anything else than a block or character special
-file (or a
-.Em whiteout )
-is not supported.
-.El
-.Pp
-In addition to the errors returned by the
-.Fn mknod ,
-the
-.Fn mknodat
-may fail if:
-.Bl -tag -width Er
-.It Bq Er EBADF
-The
-.Fa path
-argument does not specify an absolute path and the
-.Fa fd
-argument is neither
-.Dv AT_FDCWD
-nor a valid file descriptor open for searching.
-.It Bq Er ENOTDIR
-The
-.Fa path
-argument is not an absolute path and
-.Fa fd
-is neither
-.Dv AT_FDCWD
-nor a file descriptor associated with a directory.
-.El
-.Sh SEE ALSO
-.Xr chmod 2 ,
-.Xr mkfifo 2 ,
-.Xr stat 2 ,
-.Xr umask 2
-.Sh STANDARDS
-The
-.Fn mknodat
-system call follows The Open Group Extended API Set 2 specification.
-.Sh HISTORY
-The
-.Fn mknod
-function appeared in
-.At v4 .
-The
-.Fn mknodat
-system call appeared in
-.Fx 8.0 .