#!/usr/bin/sh

set -eux

SOCAT="$1"
SERVER="$2"
CLIENT="$3"

# Meet DBus bus and path name constraints, append own PID for parallel runs
TEST_NAME="$(basename "$0" | tr '-' '_')"_${$}
TEST_DIR="$(mktemp --tmpdir --directory "${TEST_NAME}.XXXXXX")"
PTYS_PID=""
SERVER_PID=""
CLIENT_PID=""

cd "$TEST_DIR"

cleanup()
{
  [ -z "$CLIENT_PID" ] || kill "$CLIENT_PID"
  [ -z "$SERVER_PID" ] || kill "$SERVER_PID"
  [ -z "$PTYS_PID" ] || kill "$PTYS_PID"
  wait
  cd -
  rm -rf "$TEST_DIR"
}

trap cleanup EXIT

TEST_CONF="${TEST_NAME}.conf"
TEST_LOG="${TEST_NAME}.log"

cat <<EOF > "$TEST_CONF"
active-console = $TEST_NAME
[$TEST_NAME]
console-id = $TEST_NAME
logfile = $TEST_LOG
EOF

"$SOCAT" -u PTY,raw,echo=0,link=remote PTY,raw,echo=0,wait-slave,link=local &
PTYS_PID="$!"
while ! [ -e remote ] || ! [ -e local ]; do sleep 1; done

"$SERVER" --config "$TEST_CONF" "$(realpath local)" &
SERVER_PID="$!"
while ! busctl status --user xyz.openbmc_project.Console."${TEST_NAME}"; do sleep 1; done

$SOCAT EXEC:"$CLIENT -i $TEST_NAME" EXEC:'grep -m1 -qF client-reads-this' &
CLIENT_PID="$!"

sleep 1

echo client-reads-this > remote

sleep 1

# If we can signal the process, the test has failed.
# The 'grep -m1' should have ended the process when the message was read.
kill -0 "$CLIENT_PID" && exit 1
CLIENT_PID=""