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mknod.2freebsd

BSD mandoc

NAME

mknod - make a special file node

LIBRARY

Lb libc

SYNOPSIS

In unistd.h Ft int Fn mknod const char *path mode_t mode dev_t dev

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.

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.

The Fn mknod system call requires super-user privileges.

RETURN VALUES

Rv -std mknod

ERRORS

The Fn mknod system call 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 255 characters, or an entire path name exceeded 1023 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

The Fa path argument points outside the process's allocated address space.

Bq Er EINVAL

Creating anything else than a block or character special file (or a whiteout is not supported.

SEE ALSO

chmod(2), mkfifo(2), stat(2), umask(2)

HISTORY

The Fn mknod function appeared in AT&T System v6 .