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From: chris@umcp-cs.UUCP
Newsgroups: net.unix-wizards
Subject: Re: /bin/sh feature? (and, Fun With #! Lines)
Message-ID: <7977@umcp-cs.UUCP>
Date: Fri, 27-Jul-84 00:25:04 EDT
Article-I.D.: umcp-cs.7977
Posted: Fri Jul 27 00:25:04 1984
Date-Received: Mon, 23-Jul-84 01:44:42 EDT
References: <7@ism780b.UUCP> <150@godot.UUCP> <754@hcrvax.UUCP>
Organization: Univ. of Maryland, Computer Science Dept.
Lines: 39

One annoying thing about using quoted ``hereis document'' terminators
is that /bin/sh and /bin/csh demand different conventions.  If you are
using /bin/sh, you must NOT quote the terminator.  For example,

	#! /bin/sh
	cat << 'eof'
	Hi there.
	eof

HOWEVER, if you are using /bin/csh, you HAVE to quote the terminator
(and moreover, in the same way as the original).  The script

	#! /bin/csh
	cat << \eof
	Hi.  I'll bet you're expecting this to be the only line.
	eof
	'e'of
	\eof

prints THREE lines.

[Of course, there's always the self-catting awk script:

	#! /bin/awk NR > 1 { print }

is an executable (4BSD anyway) file which prints itself, except
for the first line.

For more fun, try these scripts:

	#! /bin/rm

	#! /bin/mv

Got any other interesting scripts?]
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci (301) 454-7690
UUCP:	{seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris@maryland