tests: check various ways to specify kill signal

CC: Bernhard Voelker <mail@bernhard-voelker.de>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

tests/expected/kill/options

@@ -0,0 +1 @@
+all ok

tests/ts/kill/options

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+# This file is part of util-linux.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+TS_TOPDIR="${0%/*}/../.."
+TS_DESC="options"
+
+. "$TS_TOPDIR/functions.sh"
+ts_init "$*"
+
+ts_check_test_command "$TS_CMD_KILL"
+ts_check_test_command "$TS_HELPER_SIGRECEIVE"
+
+all_ok=true
+
+HELPER_SYMLINK="$TS_OUTDIR/$(mktemp -u XXXXXXXXXXXXXXX)"
+ln -s "$TS_HELPER_SIGRECEIVE" "$HELPER_SYMLINK"
+trap "rm -f $HELPER_SYMLINK" 0
+
+try_option()
+{
+	"$HELPER_SYMLINK" >> "$TS_OUTPUT" 2>&1 &
+	TEST_PID=$!
+	# test_sigreceive needs time to start up
+	up=0
+	for i in 0.01 0.1 1 1 1 1; do
+		awk 'BEGIN { retval=1 }
+		$1 ~ /^SigCgt/ {
+			lbyte = strtonum("0x" substr($2, 16, 16))
+			if (and(lbyte, 1)) {
+				retval=0
+			}
+		} END {
+			exit retval
+		}' /proc/$TEST_PID/status &&
+			up=1 &&
+			break
+		sleep $i
+	done
+	test $up = 1 || echo "$@ sigreceive helper did not start" >> "$TS_OUTPUT"
+	"$TS_CMD_KILL" "$@" $TEST_PID >> "$TS_OUTPUT" 2>&1
+	if [ $? -ne 0 ]; then
+		echo "kill $@ did not work" >> "$TS_OUTPUT"
+		all_ok=false
+	fi
+	wait $TEST_PID
+	if [ $? -ne 1 ]; then
+		echo "wait $TEST_PID for $@ did not work" >> "$TS_OUTPUT"
+		all_ok=false
+	fi
+}
+
+try_option -s 1
+try_option --signal 1
+try_option --signal HUP
+try_option --signal SIGHUP
+try_option -q HUP
+try_option --queue HUP
+try_option -1
+try_option -HUP
+try_option -SIGHUP
+
+if $all_ok; then
+	echo 'all ok' >> "$TS_OUTPUT"
+fi
+
+ts_finalize