options   [plain text]

# SHOPT_* option probe

tst	cross{
	: check for shell magic #!
	cat > /tmp/file$$ <<!
	#! /bin/echo
	exit 1
	!
	chmod 755 /tmp/file$$
	if	/tmp/file$$ > /dev/null
	then	echo "#define SHELLMAGIC	1"
	fi
	rm -f /tmp/file$$
	
	option() # name value
	{
		case $2 in
		0)	echo "#ifndef SHOPT_$1"
			echo "#   define SHOPT_$1	1"
			echo "#endif"
			;;
		*)	echo "#undef  SHOPT_$1"
			;;
		esac
	}
	
	ls /dev/fd/9 9<&0 >/dev/null 2>&1
	option DEVFD $?
	exec 9<&-
	case  `echo a | tr a '\012' | wc -l` in
	*1*)	option MULTIBYTE 0 ;;
	esac
	test -x /bin/pfexec -o -x /usr/bin/pfexec
	option PFSH $?
	/bin/test ! -l . 2> /dev/null
	option TEST_L $?
	test -f /etc/ksh.kshrc -o -f /etc/bash.bashrc &&
	option SYSRC 0
	test -f /bin/universe && univ=`/bin/universe` > /dev/null 2>&1 -a ucb = "$univ"
	option UCB $?
}end

cat{
	#if !_PACKAGE_ast && ( (MB_LEN_MAX-1)<=0 || !defined(_lib_mbtowc) )
	#   undef SHOPT_MULTIBYTE
	#endif
}end