browser-box: add support for video devices

entrypoint.sh

@@ -49,7 +49,19 @@ case "$1" in
         --gecos 'Browser Box' ${WEB_BROWSER_USER}
     fi
 
-    # launch application as ${WEB_BROWSER_USER}
+    # grant access to video devices
+    for device in /dev/video*
+    do
+      if [[ -c $device ]]; then
+        VIDEO_GID=$(stat -c %g $device)
+        break
+      fi
+    done
+
+    if [[ -n $VIDEO_GID ]]; then
+      usermod -a -G $VIDEO_GID ${WEB_BROWSER_USER}
+    fi
+
     cd /home/${WEB_BROWSER_USER}
     exec sudo -u ${WEB_BROWSER_USER} -H PULSE_SERVER=/run/pulse/native $@ ${extra_opts}
     ;;

scripts/browser-box

@@ -28,6 +28,15 @@ else
     fi
   done
 
+  # enumerate video devices for webcam support
+  VIDEO_DEVICES=
+  for device in /dev/video*
+  do
+    if [ -c $device ]; then
+      VIDEO_DEVICES="${VIDEO_DEVICES} --device $device:$device"
+    fi
+  done
+
   echo "Starting ${prog}..."
   touch ${XAUTH}
   docker run -d \
@@ -36,6 +45,7 @@ else
     --env="USER_GID=${USER_GID}" \
     --env="DISPLAY" \
     --env="XAUTHORITY=${XAUTH}" \
+    ${VIDEO_DEVICES} \
     --volume=${XSOCK}:${XSOCK} \
     --volume=${XAUTH}:${XAUTH} \
     --volume=/run/user/${USER_UID}/pulse:/run/pulse \