From 11f02967bcae43f27912e1266e1c82db399268ea Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Mon, 18 May 2020 01:05:49 +0200
Subject: [PATCH] pm3: test access to /dev/ttyXXX files as prerequisite for
 linux

---
 pm3 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pm3 b/pm3
index 19399f0bd..7d2c5e5f7 100755
--- a/pm3
+++ b/pm3
@@ -30,6 +30,10 @@ SHOWLIST=false
 function get_pm3_list_Linux {
     N=$1
     PM3LIST=()
+    if [ ! -c "/dev/tty0" ]; then
+        echo >&2 "[!!] Script cannot access /dev/ttyXXX files, insufficient privileges"
+        exit 1
+    fi
     for DEV in $(find /dev/ttyACM* 2>/dev/null); do
         if which udevadm >/dev/null; then
             if udevadm info -q property -n "$DEV" | grep -q "ID_VENDOR=proxmark.org"; then