MKNOD
Section: System Calls (2)
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BSD mandoc
BSD 4
NAME
mknod
- make a special file node
SYNOPSIS
Fd #include <unistd.h>
Ft int
Fn mknod const char *path mode_t mode dev_t dev
DESCRIPTION
The device special file
Fa path
is created with the major and minor
device numbers extracted from
Fa mode.
The access permissions of
Fa path
are descendant from the
umask(2)
of the parent process.
If
Fa mode
indicates a block or character special file,
Fa dev
is a configuration dependent specification of a character or block
I/O device and the superblock of the device. If
Fa mode
does not indicate a block special or character special device,
Fa dev
is ignored.
Fn Mknod
requires super-user privileges.
RETURN VALUES
Upon successful completion a value of 0 is returned.
Otherwise, a value of -1 is returned and
errno
is set to indicate the error.
ERRORS
Fn Mknod
will fail and the file will be not created if:
- Bq Er ENOTDIR
-
A component of the path prefix is not a directory.
- Bq Er ENAMETOOLONG
-
A component of a pathname exceeded
{NAME_MAX}
characters, or an entire path name exceeded
{PATH_MAX}
characters.
- Bq Er ENOENT
-
A component of the path prefix does not exist.
- Bq Er EACCES
-
Search permission is denied for a component of the path prefix.
- Bq Er ELOOP
-
Too many symbolic links were encountered in translating the pathname.
- Bq Er EPERM
-
The process's effective user ID is not super-user.
- Bq Er EIO
-
An I/O error occurred while making the directory entry or allocating the inode.
- 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.
- Bq Er ENOSPC
-
There are no free inodes on the file system on which the
node is being created.
- 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.
- Bq Er EDQUOT
-
The user's quota of inodes on the file system on
which the node is being created has been exhausted.
- Bq Er EROFS
-
The named file resides on a read-only file system.
- Bq Er EEXIST
-
The named file exists.
- Bq Er EFAULT
-
Fa Path
points outside the process's allocated address space.
SEE ALSO
chmod(2),
stat(2),
umask(2)
HISTORY
A
Fn mknod
function call appeared in
AT&T System
v6 .
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- ERRORS
-
- SEE ALSO
-
- HISTORY
-
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Time: 16:28:59 GMT, April 18, 2022