From 292686c3ca64d174257b3fa698b89c7e0d3b54e7 Mon Sep 17 00:00:00 2001
From: Martin Wimpress <code@flexion.org>
Date: Thu, 19 Mar 2020 17:28:13 +0000
Subject: [PATCH] Add get_port() function

Find a free port from an available range.
---
 quickemu.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/quickemu.sh b/quickemu.sh
index 137d09e..d8aa995 100755
--- a/quickemu.sh
+++ b/quickemu.sh
@@ -29,6 +29,19 @@ function vm_snapshot() {
   exit 0
 }
 
+function get_port() {
+    local PORT_START=22220
+    local PORT_RANGE=9
+    while true; do
+        local CANDIDATE=$[${PORT_START} + (${RANDOM} % ${PORT_RANGE})]
+        (echo "" >/dev/tcp/127.0.0.1/${CANDIDATE}) >/dev/null 2>&1
+        if [ $? -ne 0 ]; then
+            echo "${CANDIDATE}"
+            break
+        fi
+    done
+}
+
 function vm_boot() {
   local VMNAME=$(basename ${VM} .conf)
   local BIOS=""