From 9001ab58581b59cae1985bb22f8c0362e54256fc Mon Sep 17 00:00:00 2001
From: Adam Ierymenko <adam.ierymenko@gmail.com>
Date: Wed, 2 May 2018 14:08:42 -0700
Subject: Do not add zerotier-one user if it does not exist (Debian)

---
 debian/postinst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/debian/postinst b/debian/postinst
index ecd148a4..0d540a67 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -2,7 +2,9 @@
 
 case "$1" in
   configure)
-      adduser --system --group --home /var/lib/zerotier-one --no-create-home zerotier-one
+      if ! id zerotier-one >>/dev/null 2>&1; then
+        adduser --system --group --home /var/lib/zerotier-one --no-create-home zerotier-one
+      fi
       ;;
 esac
 
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