From: utzoo!decvax!harpo!seismo!hao!hplabs!sri-unix!gwyn@Brl-Vld.ARPA
Newsgroups: net.unix-wizards
Title: Re:  Bug in the ctype macro issprint??
Article-I.D.: sri-arpa.939
Posted: Sun Apr  3 15:41:37 1983
Received: Tue Apr 19 02:05:28 1983

From:      Doug Gwyn (VLD/VMB) <gwyn@Brl-Vld.ARPA>

Isprint() DOES classify a space as a printing character, on Bell
UNIXes from System III on.  Isgraph() is similar, but treats a
space as non-graphic.

I recommend that people get a copy of the UNIX System V manuals
(available without licensing the software), just to see what a
UNIX looks like these days.  A lot has happened since 1978.