cat.4

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th CAT IV 10/27/73
.sh NAME
cat \*- phototypesetter interface
.sh DESCRIPTION
.it Cat
provides the interface to a Graphic Systems C/A/T
phototypesetter.
Bytes written on the file specify font, size, and other control
information as well as the characters to be flashed.
The coding will not be described here.
.s3
Only one process may have
this file open at a time.
It is write-only.
.sh FILES
/dev/cat
.sh "SEE ALSO"
troff (I),
Graphic Systems specification (available on request)
.sh BUGS