?RCS: $Id: spitshell.U 1 2006-08-24 12:32:52Z rmanfredi $
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic Licence,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?RCS: $Log: spitshell.U,v $
?RCS: Revision 3.0.1.4  1997/02/28  16:22:12  ram
?RCS: patch61: removed useless chatter as this is now done very early
?RCS:
?RCS: Revision 3.0.1.3  1995/01/11  15:37:01  ram
?RCS: patch45: use 'test -f' instead of 'test -r' for exec-only cat progs (WED)
?RCS: patch45: protected "sh -c" within backquotes for Linux and SGI
?RCS:
?RCS: Revision 3.0.1.2  1994/08/29  16:33:00  ram
?RCS: patch32: don't create spitshell under the UU directory
?RCS: patch32: allow for cat in /bin or /usr/bin
?RCS:
?RCS: Revision 3.0.1.1  1993/09/13  16:12:58  ram
?RCS: patch10: made #!-failure message more friendly (WAD)
?RCS:
?RCS: Revision 3.0  1993/08/18  12:09:49  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:spitshell shsharp sharpbang: eunicefix sh Head
?MAKE:	-pick add $@ %<
?S:spitshell:
?S:	This variable contains the command necessary to spit out a runnable
?S:	shell on this system.  It is either cat or a grep -v for # comments.
?S:.
?S:shsharp:
?S:	This variable tells further Configure units whether your sh can
?S:	handle # comments.
?S:.
?S:sharpbang:
?S:	This variable contains the string #! if this system supports that
?S:	construct.
?S:.
?F:!sharp
?T:xcat p
?X: "paths" comes from Head
?LINT:extern paths _exe
: see if sh knows # comments
?X: This is loaded up early, so avoid being chatty.
?X: echo " "
?X: echo "Checking your $sh to see if it knows about # comments..." >&2
if `$sh -c '#' >/dev/null 2>&1`; then
?X:	echo "Your $sh handles # comments correctly."
	shsharp=true
	spitshell=cat
?X:	echo " "
?X:	echo "Okay, let's see if #! works on this system..."
	xcat=/bin/cat
	test -f $xcat$_exe || xcat=/usr/bin/cat
	if test ! -f $xcat$_exe; then
		for p in `echo $PATH | sed -e "s/$p_/ /g"` $paths; do
			if test -f $p/cat$_exe; then
				xcat=$p/cat
				break
			fi
		done
		if test ! -f $xcat$_exe; then
			echo "Can't find cat anywhere!"
			exit 1
		fi
	fi
	echo "#!$xcat" >sharp
	$eunicefix sharp
	chmod +x sharp
	./sharp > today 2>/dev/null
	if test -s today; then
?X:		echo "It does."
		sharpbang='#!'
	else
		echo "#! $xcat" > sharp
		$eunicefix sharp
		chmod +x sharp
		./sharp > today 2>/dev/null
		if test -s today; then
?X:			echo "It does."
			sharpbang='#! '
		else
?X:			echo "Okay, let's see if #! works on this system..."
?X:			echo "It's just a comment."
			sharpbang=': use '
		fi
	fi
else
	echo " "
	echo "Your $sh doesn't grok # comments--I will strip them later on."
	shsharp=false
?X: The spitshell script will be perused, so leave it out the UU directory
	cd ..
	echo "exec grep -v '^[ 	]*#'" >spitshell
	chmod +x spitshell
	$eunicefix spitshell
	spitshell=`pwd`/spitshell
	cd UU
	echo "I presume that if # doesn't work, #! won't work either!"
	sharpbang=': use '
fi
rm -f sharp today

