Fix QMI USSD async response handling and prevent st terminal popup

overlay/rootfs/usr/bin/sxmo_ussd.sh

@@ -0,0 +1,33 @@
+#!/bin/sh
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2022 Sxmo Contributors
+
+# include common definitions
+# shellcheck source=scripts/core/sxmo_common.sh
+. sxmo_common.sh
+
+MODEM="$1"
+TYPE="$2"
+MESSAGE="${3:-}"
+
+# If xdialer, xmodem, or msm-modem-uim-selection ussd is actively handling USSD,
+# do not interfere with the active USSD session.
+RDIR="${XDG_RUNTIME_DIR:-/tmp}"
+if [ -f "$RDIR/xdialer.pid" ] || [ -f "$RDIR/xmodem.pid" ] || \
+   pgrep -f "msm-modem-uim-selection ussd" >/dev/null 2>&1; then
+  exit 0
+fi
+
+MM_IFACE="org.freedesktop.ModemManager1"
+DBUS_PROP_IFACE="org.freedesktop.DBus.Properties"
+USSD_IFACE="org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd"
+
+if [ "$TYPE" = "NetworkNotification" ] || [ "$TYPE" = "NetworkRequest" ]; then
+  MESSAGE="$(busctl --json=short call "$MM_IFACE" "$MODEM" "$DBUS_PROP_IFACE" Get ss "$USSD_IFACE" "$TYPE" 2>/dev/null | jq -r '.data[].data // empty' 2>/dev/null || true)"
+fi
+
+if [ -z "$MESSAGE" ]; then
+  exit 0
+fi
+
+sxmo_notify_user.sh "USSD: $MESSAGE"