Fixes #133 - adds workaround for UID/GID on closed systems - prefer -…

…u param

Dockerfile

@@ -34,7 +34,7 @@ WORKDIR /opt/JDownloader
 
 CMD ["/opt/JDownloader/daemon.sh"]
 
-RUN if [ "" = "$ISDEB" ]; then apk add --update libstdc++ ffmpeg wget procps && \
+RUN if [ "" = "$ISDEB" ]; then apk add --update libstdc++ ffmpeg wget procps shadow && \
      wget -O /opt/JDownloader/JDownloader.jar "http://installer.jdownloader.org/JDownloader.jar?$RANDOM" && \
      chmod 777 /opt/JDownloader/ -R && \
      apk del wget --purge; \

README.md

@@ -51,6 +51,8 @@ services:
             MYJD_PASSWORD: bar #optional (see [Identify](https://github.com/jaymoulin/docker-jdownloader#identify))
             MYJD_DEVICE_NAME: goofy #optional
             XDG_DOWNLOAD_DIR: /opt/JDownloader/Downloads #optional
+            PUID: 1000 #optional user id - not recommanded
+            GID: 1000 #optional group id - not recommanded
     ports:
         - 3129:3129 
     secrets:
@@ -135,7 +137,7 @@ You can set many parameters when you configure this container, but you must spec
 | `-v /opt/JDownloader/app/logs` | Container logs folder, specify it only if you wan to keep logs on the host |
 | `-v /opt/JDownloader/app/extensions` | Extensions folder, specify it only if you wan to install extensions and keep it on the host |
 | `-v /opt/JDownloader/Downloads` | Downloads folder (where you put your `download` mountpoint) | 
-| `-u <UID>:<GID>` | Add user identifiers to run the container with user priviledges. To obtain such values, run on your host `id yourusername`, additional information can be found in [Docker documentation](https://docs.docker.com/engine/reference/commandline/exec/#options)
+| `-u <UID>:<GID>` | Add user identifiers to run the container with user privileges. To obtain such values, run on your host `id yourusername`, additional information can be found in [Docker documentation](https://docs.docker.com/engine/reference/commandline/exec/#options) |
 | `-p 3129:3129` | This Network port is required for Direct Connection mode, more information in [this section](https://github.com/jaymoulin/docker-jdownloader#direct-connection) |
 
 ### Environment Variables
@@ -148,6 +150,8 @@ You can set many parameters when you configure this container, but you must spec
 | `MYJD_DEVICE_NAME=goofy`| The device name that will appear on MyJdownloader portal |
 | `XDG_DOWNLOAD_DIR=/opt/JDownloader/Downloads` | If you use this variable, set it as per the downloads folder volume! |
 | `UMASK="0002"` | Defines specific rights for your downloaded files (default: undefined) - Must respect octal form (begins with 0 followed by three numbers between 0 and 7 included) (cf. https://en.wikipedia.org/wiki/Umask) |
+| `PUID=1000` | Your user id (for your user privileges) - workaround for closed systems, prefer `-u` flag method instead [Docker documentation](https://docs.docker.com/engine/reference/commandline/exec/#options) |
+| `GID=1000` | Your group id (for your user privileges) - workaround for closed systems, prefer `-u` flag method instead [Docker documentation](https://docs.docker.com/engine/reference/commandline/exec/#options) |
 
 #### Identify
 There are 3 possibilities to give login password for MyJDownloader:

daemon.sh

@@ -4,6 +4,16 @@ trap 'kill -TERM $PID' TERM INT
 rm -f /opt/JDownloader/app/JDownloader.jar.* 2> /dev/null
 rm -f /opt/JDownloader/app/JDownloader.pid 2> /dev/null
 
+# Define PUID/GID workaround for closed systems
+if [ -n "$PUID" ]; then
+    adduser jdown -D 2> /dev/null
+    usermod -u $PUID jdown
+fi
+
+if [ -n "$GID" ]; then
+    groupmod -g $GID jdown
+fi
+
 # Login user with docker secret or env credentials - Please prefer command way
 if [ -n "$FILE_MYJD_USER" ] && [ -n "$FILE_MYJD_PASSWORD" ]; then
     configure $(cat "/run/secrets/$FILE_MYJD_USER") $(cat "/run/secrets/$FILE_MYJD_PASSWORD")
@@ -52,7 +62,7 @@ if echo "$UMASK" | grep -Eq '0[0-7]{3}' ; then
     umask "$UMASK"
 fi
 
-java -Dsun.jnu.encoding=UTF-8 -Dfile.encoding=UTF-8 -Djava.awt.headless=true -jar /opt/JDownloader/app/JDownloader.jar -norestart &
+su jdown -s /bin/sh -c 'java -Dsun.jnu.encoding=UTF-8 -Dfile.encoding=UTF-8 -Djava.awt.headless=true -jar /opt/JDownloader/app/JDownloader.jar -norestart' &
 PID=$!
 while [ "$PID" ]
 do