Use dotter

local/bin/imv-open

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+FIFO_PATH="$1"
+IMAGE="$2"
+MAINWINDOW="$(xdotool getactivewindow)"
+IMV_PID="$(pgrep nsxiv)"
+
+if [ ! "$IMV_PID" ]; then
+	nsxiv -aio "$IMAGE" &
+	IMV_PID=$!
+fi
+
+sleep 0.5
+
+xdotool windowactivate "$MAINWINDOW"
+
+while read -r path; do
+	imv-msg "$IMV_PID" close all
+	imv-msg "$IMV_PID" open "$path"
+done <"$FIFO_PATH"
+
+imv-msg "$IMV_PID" quit
+[ -e "$FIFO_PATH" ] && rm -f -- "$FIFO_PATH"