#! /bin/sh
# textfiles -- filter out non-text file names
#
# SYNOPSIS:  Take a number of file names either as standard input
# or as arguments on the command line.  Print names of ones which are
# text files back on standard output.
#
# AUTHOR:	Gary T. Leavens

[ -n "$echo" ] && set -x


USAGE="Usage: $0 [file ...]"

if test $# -eq 1  -a  "$1" = '-?'
then
	echo "$USAGE" >&2
	exit 2
fi


if test $# -eq 0  -o  x"$1" = x'-'
then
	if test -t 0
	then
		echo "$0 : expecting file names:" >/dev/tty
	fi
	while read f
	do
		if test -f "$f"  -a  -r "$f"
		then
			case `file $f` in
			*" text")
				echo "$f"
				;;
			*" script")
				echo "$f"
				;;
			esac
		fi
	done
else
	for f
	do
		if test -f "$f"  -a  -r "$f"
		then
			case `file $f` in
			*" text")
				echo "$f"
				;;
			*" script")
				echo "$f"
				;;
			esac
		fi
	done
fi

exit 0