Improvement of support for docker USER directive. Fixes #1727.

gns3server/compute/docker/resources/init.sh

@@ -87,9 +87,5 @@ done
 ifup -a -f
 
 # continue normal docker startup
-GNS3_CMD="PATH=$OLD_PATH exec"
-while test "$#" -gt 0 ; do
-    GNS3_CMD="${GNS3_CMD} \"${1//\"/\\\"}\""
-    shift
-done
-exec su ${GNS3_USER-root} -p -c "$GNS3_CMD"
+eval HOME=$(echo ~${GNS3_USER-root})
+exec su ${GNS3_USER-root} -p -- /gns3/run-cmd.sh "$OLD_PATH" "$@"

gns3server/compute/docker/resources/run-cmd.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+# run docker startup, first arg is new PATH, remainder is command
+
+PATH="$1"
+shift
+exec "$@"