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.\" @(#)mknod.2 6.5 (Berkeley) 3/10/91
.Nd make a special file node
.Fn mknod "const char *path" "mode_t mode" "dev_t dev"
is created with the major and minor
device numbers extracted from
The access permissions of
indicates a block or character special file,
is a configuration dependent specification of a character or block
I/O device and the superblock of the device. If
does not indicate a block special or character special device,
requires super-user privileges.
Upon successful completion a value of 0 is returned.
Otherwise, a value of -1 is returned and
is set to indicate the error.
will fail and the file will be not created if:
A component of the path prefix is not a directory.
The pathname contains a character with the high-order bit set.
A component of a pathname exceeded 255 characters,
or an entire path name exceeded 1023 characters.
A component of the path prefix does not exist.
Search permission is denied for a component of the path prefix.
Too many symbolic links were encountered in translating the pathname.
The process's effective user ID is not super-user.
The pathname contains a character with the high-order bit set.
An I/O error occurred while making the directory entry or allocating the inode.
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.
There are no free inodes on the file system on which the
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.
The user's quota of inodes on the file system on
which the node is being created has been exhausted.
The named file resides on a read-only file system.
points outside the process's allocated address space.
function call appeared in Version 6 AT&T UNIX.