MKNOD(2) System Calls Manual MKNOD(2)
mknod - make a directory or a special file
mknod(name, mode, addr)
Mknod creates a new file whose name is the null-terminated string
pointed to by name. The mode of the new file (including directory and
special file bits) is initialized from mode. (The protection part of
the mode is modified by the process's mode mask; see umask(2)). The
first block pointer of the i-node is initialized from addr. For ordi-
nary files and directories addr is normally zero. In the case of a
special file, addr specifies which special file.
Mknod may be invoked only by the super-user.
mkdir(1), mknod(1), filsys(5)
Zero is returned if the file has been made; -1 if the file already
exists or if the user is not the super-user.
(mknod = 14.)
sys mknod; name; mode; addr