Use temp file in dbus_wrapper.sh for test

This should allow test to be run in parallel.

Author: wengxt

test/dbus_wrapper.sh

@@ -5,19 +5,30 @@ finish()
     if [ -n "$DBUS_SESSION_BUS_PID" ]; then
         kill "$DBUS_SESSION_BUS_PID" || exit 1
     fi
-    rm -f dbus-session-bus-pid
-    rm -f dbus-session-bus-address
+    if [ -n "$ADDRESS_FILE" ]; then
+        rm -f -- "$ADDRESS_FILE"
+    fi
+    if [ -n "$PID_FILE" ]; then
+        rm -f -- "$PID_FILE"
+    fi
 }
 
+ADDRESS_FILE=
+PID_FILE=
+
 trap finish EXIT
+
+ADDRESS_FILE=$(mktemp -p "$PWD" dbus-session-bus-address.XXXXXX)
+PID_FILE=$(mktemp -p "$PWD" dbus-session-bus-pid.XXXXXX)
+
 DBUS_DAEMON=$1
 shift
 
 "$DBUS_DAEMON" --fork --session --print-address=3 --print-pid=4 \
-  3> dbus-session-bus-address 4> dbus-session-bus-pid || exit 1
+  3> "$ADDRESS_FILE" 4> "$PID_FILE" || exit 1
 
-DBUS_SESSION_BUS_ADDRESS="$(cat dbus-session-bus-address)"
-DBUS_SESSION_BUS_PID="$(cat dbus-session-bus-pid)"
+DBUS_SESSION_BUS_ADDRESS=$(cat "$ADDRESS_FILE")
+DBUS_SESSION_BUS_PID=$(cat "$PID_FILE")
 
 export DBUS_SESSION_BUS_ADDRESS