Fix script to use getopts instead of a hand rolled argument parser,

add option to set curses debug output file and other general fixes.
Thanks to kre@netbsd.org for comments and help with this.

tests/lib/libcurses/debug_test

@@ -1,13 +1,5 @@
 #!/bin/sh
 #
-# Set up the environment to run the test frame.  Option flags:
-#
-# -c : Set up curses tracing, assumes the curses lib has been built with
-#      debug enabled.  Default trace mask traces input, can be overridden
-#      by setting the trace mask in the environment before calling the
-#      script.
-# -s : Specify the slave command.  Defaults to "../slave/slave"
-# -v : Enable verbose output
 #
 BASEDIR="/usr/tests/lib/libcurses"
 CHECK_PATH="${BASEDIR}/check_files/"
@@ -15,15 +7,31 @@ export CHECK_PATH
 INCLUDE_PATH="${BASEDIR}/tests/"
 export INCLUDE_PATH
 #
+CURSES_TRACE_FILE="/tmp/ctrace"
 SLAVE="${BASEDIR}/slave"
+
+usage() {
+	echo "Set up the environment to run the test frame.  Option flags:"
+	echo
+	echo "    -c : Set up curses tracing, assumes the curses lib has been built with"
+	echo "         debug enabled.  Default trace mask traces input, can be overridden"
+	echo "         by setting the trace mask in the environment before calling the"
+	echo "         The trace file output goes to /tmp/ctrace"
+	echo "         script."
+	echo "    -f : Specify the file name for curses tracing the default is"
+	echo "         ${CURSES_TRACE_FILE}"
+	echo "    -s : Specify the slave command.  Defaults to \"../slave/slave\""
+	echo "    -v : Enable verbose output"
+	echo
+}
+
 #
 ARGS=""
 #
-while /usr/bin/true
+while getopts cf:s:v opt
 do
-    case $1 in
-	-c)
-	    CURSES_TRACE_FILE="/tmp/ctrace"
+    case "${opt}" in
+	c)
 	    if [ "X$CURSES_TRACE_MASK" = "X" ]; then
 		CURSES_TRACE_MASK=0x00000082
 	    fi
@@ -31,21 +39,35 @@ do
 	    export CURSES_TRACE_MASK
 	    ;;
 
-	-s)
-	    SLAVE=$2
-	    shift
+	f)
+	    CURSES_TRACE_FILE=${OPTARG}
 	    ;;
 
-	-v)
+	s)
+	    SLAVE=${OPTARG}
+	    ;;
+
+	v)
 	    ARGS="-v"
 	    ;;
 
-	*)
-	    break
+	\?)
+	    usage
+	    exit 1
 	    ;;
     esac
-
-    shift
 done
 #
-exec ${BASEDIR}/director ${ARGS} -s ${SLAVE} ${INCLUDE_PATH}/$@
+shift $((OPTIND - 1))
+#
+if [ -z "${1}" ]
+then
+	echo
+	echo "A test name needs to be specified."
+	echo
+	usage
+	echo
+	exit 1
+fi
+#
+exec ${BASEDIR}/director ${ARGS} -s ${SLAVE} "${INCLUDE_PATH}/$1"