NAME
mknod
- make a special file node
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
int
mknod(
const char *path
, mode_t mode
, dev_t dev
)
DESCRIPTION
The device special file
path
is created with the major and minor
device numbers specified by
dev
.
The access permissions of
path
are extracted from
mode
,
modified by the
umask(2)
of the parent process.
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
mknod(
)
will fail and the file will be not created if:
- [
ENOTDIR
] -
A component of the path prefix is not a directory.
- [
ENAMETOOLONG
] -
A component of a pathname exceeded
{NAME_MAX}
characters, or an entire path name exceeded
{PATH_MAX}
characters.
- [
ENOENT
] -
A component of the path prefix does not exist.
- [
EACCES
] -
Search permission is denied for a component of the path prefix.
- [
ELOOP
] -
Too many symbolic links were encountered in translating the pathname.
- [
EPERM
] -
The process's effective user ID is not super-user.
- [
EIO
] -
An I/O error occurred while making the directory entry or allocating the inode.
- [
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.
- [
ENOSPC
] -
There are no free inodes on the file system on which the
node is being created.
- [
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.
- [
EDQUOT
] -
The user's quota of inodes on the file system on
which the node is being created has been exhausted.
- [
EROFS
] -
The named file resides on a read-only file system.
- [
EEXIST
] -
The named file exists.
- [
EFAULT
] -
path
points outside the process's allocated address space.
SEE ALSO
chmod(2),
mkfifo(2),
stat(2),
umask(2)
HISTORY
A
mknod(
)
function call appeared in
Version 6 AT&T UNIX
.