-.TH CAT 1 "18 January 1983"
+.\" Copyright (c) 1980 Regents of the University of California.
+.\" All rights reserved. The Berkeley software License Agreement
+.\" specifies the terms and conditions for redistribution.
+.\"
+.\" @(#)cat.1 6.2 (Berkeley) 5/5/86
+.\"
+.TH CAT 1 "May 5, 1986"
.UC 4
.SH NAME
cat \- catenate and print
If no input file is given, or if the argument `\-' is encountered,
.I cat
reads from the standard input file.
-Output is buffered in 1024-byte blocks unless the standard
-output is a terminal, in which case it is line buffered. The
+Output is buffered in the block size recommended by \fIstat\fP(2)
+unless the standard output is a terminal,
+when it is line buffered. The
.B \-u
option makes the output completely unbuffered.
.PP