From 9f31e8d6c1666660bba94c1d235ab101c6392d77 Mon Sep 17 00:00:00 2001
From: Vladimir Hodakov <vladimir@hodakov.me>
Date: Sat, 18 Apr 2020 17:41:46 +0400
Subject: [PATCH] Add ability to create users from environment variables

---
 Dockerfile    |  8 ++++++--
 entrypoint.sh | 14 ++++++++++++++
 2 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 entrypoint.sh

diff --git a/Dockerfile b/Dockerfile
index b36fae6..cbef0e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,11 @@
 FROM alpine
 MAINTAINER Vladimir Hodakov <vladimir@hodakov.me>
 
-RUN apk add --no-cache samba-common-tools samba-server
+RUN apk add --no-cache tini bash samba-common-tools samba-server
+
+COPY entrypoint.sh /usr/local/bin/entrypoint
+
+RUN ["chmod", "+x", "/usr/local/bin/entrypoint"]
 
 VOLUME /etc/samba \
        /var/lib/samba \
@@ -12,4 +16,4 @@ EXPOSE 137/udp \
        139/tcp \
        445/tcp
 
-CMD nmbd -D && smbd -FS --no-process-group
+CMD ["/sbin/tini", "--", "/usr/local/bin/entrypoint"]
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..2bf662e
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+while IFS='=' read -r name value ; do
+  if [[ $name == 'USER'* ]]; then
+    IFS=';'
+    read -ra userParams <<< "${!name}"
+    echo "Adding user ${userParams[0]}"
+    adduser --no-create-home --uid "${userParams[2]}" --ingroup "${userParams[1]}" \
+    --disabled-password "${userParams[0]}"
+  fi
+done < <(env)
+
+nmbd -D
+smbd -FS --no-process-group