make sure steam can be safely restarted

Dockerfile

@@ -25,12 +25,6 @@ RUN apt-get -y install dnsmasq
 COPY ./dnsmasq.conf /etc/dnsmasq.conf
 COPY ./resolv.dnsmasq /etc/resolv.dnsmasq
 
-# Set locale to: en_US.UTF-8
-RUN apt-get -y install locales && \
-    sed -i.orig '/^# en_US.UTF-8.*/s/^#.//g' /etc/locale.gen && \
-    locale-gen && \
-    update-locale LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8
-
 # Let ALSA lib talk to Pulseaudio.
 # AL lib: (WW) alc_initconfig: Failed to initialize backend "pulse"
 # ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
@@ -47,6 +41,14 @@ RUN apt-get -y install fontconfig:i386
 # Enable Vulkan library.
 RUN apt-get -y install libvulkan1 libvulkan1:i386 vulkan-utils
 
+RUN apt-get -y install gosu
+
+# Set locale to: en_US.UTF-8
+RUN apt-get -y install locales && \
+    /bin/echo -e "en_US.UTF-8 UTF-8\nen_GB.UTF-8 UTF-8" | tee /etc/locale.gen && \
+    locale-gen && \
+    update-locale LANG=en_US.UTF-8 LC_ALL=en_GB.UTF-8
+
 LABEL maintainer="Andrey Arapov <andrey.arapov@nixaid.com>"
 COPY ./launch /launch
 ENTRYPOINT [ "/bin/bash", "/launch" ]

launch

@@ -8,18 +8,14 @@ service dnsmasq start
 id user >/dev/null 2>&1
 [ $? -eq 0 ] || useradd -s /bin/bash -d /home/user -u ${USER_ID:-1000} -G audio,video user
 
-# NOTE: This workaround has been obsolete by "apt-get -y install libnm-glib4:i386 libnm-util2:i386".
-# WORKAROUND to "steam launcher crashes on second run (debian sid in a chroot on debian wheezy) #3501"
-# https://github.com/ValveSoftware/steam-for-linux/issues/3501
-# rm -vf ~user/.local/share/Steam/config/config.vdf
-
-# LD_PRELOAD=$LD_PRELOAD:$(for LIB in ${PRELOAD_LIBS:-libnvidia-glcore.so tls/libnvidia-tls.so libGLX_nvidia.so}; do find /hostlibs -type f -iregex ".*/${LIB}.*" -print0; done | tr '\0' ':' ; echo)
-# su -l user -c "HOME=/home/user STEAM_RUNTIME=${STEAM_RUNTIME:-1} LD_PRELOAD=$LD_PRELOAD steam $@" |& grep -v 'wrong ELF class'
+LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:/hostlibs/32:/hostlibs/64:"
+LC_ALL=en_GB.UTF-8
+LANG=en_US.UTF-8
+STEAM_RUNTIME=${STEAM_RUNTIME:-1}
 
-# LD_PRELOAD does not work well when you want to use Proton (modified version of Wine created by Steam)
-# When running the games with Proton, they will fail with:
-# "wine: Unhandled page fault on read access to 0x00000000 at address 0xf5c1c2b6 (thread 0009), starting debugger..."
-# This is due to a mix of our LD_PRELOAD and Proton's. They add ".local/share/Steam/ubuntu12_{32,64}/gameoverlayrenderer.so".
+export LD_LIBRARY_PATH
+export LC_ALL
+export LANG
+export STEAM_RUNTIME
 
-LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:/hostlibs/32:/hostlibs/64:"
-su -l user -c "HOME=/home/user STEAM_RUNTIME=${STEAM_RUNTIME:-1} LD_LIBRARY_PATH=${LD_LIBRARY_PATH} steam $@" |& grep -v 'wrong ELF class'
+gosu user steam $@ |& grep -v 'wrong ELF class'