in theory finish os_version

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

conf/explorer/os_version

@@ -27,66 +27,25 @@ case "$($__explorer/os)" in
       # empty, but well...
       cat /etc/arch-release
    ;;
-   macosx|openbsd)
+   debian)
+      cat /etc/debian_version
+   ;;
+   fedora)
+      cat /etc/fedora-release
+   ;;
+   gentoo)
+      cat /etc/gentoo-release
+   ;;
+   macosx|*bsd|solaris)
       uname -r
    ;;
-esac
-
-exit 0
-
-# Ubuntu is also Debian, thus return if Ubuntu was found
-if grep -q ^DISTRIB_ID=Ubuntu /etc/lsb-release 2>/dev/null; then
-   echo ubuntu
-   exit 0
-fi
-
-if [ -f /etc/debian_version ]; then
-   echo debian
-   exit 0
-fi
-
-if [ -f /etc/gentoo-release ]; then
-   echo gentoo
-   exit 0
-fi
-
-# Fedora is also Redhat, thus return before redhat!
-if grep -q ^Fedora /etc/redhat-release 2>/dev/null; then
-   echo fedora
-   exit 0
-fi
-
-if [ -f /etc/redhat-release ]; then
-   echo redhat
-   exit 0
-fi
-
-if [ -f /etc/SuSE-release ]; then
-   echo suse
-   exit 0
-fi
-
-uname_s="$(uname -s)"
-
-# Assume there is no tr on the client -> do lower case ourselves
-case "$uname_s" in
-   NetBSD)
-      echo netbsd
-      exit 0
+   redhat)
+      cat /etc/redhat-release
    ;;
-   FreeBSD)
-      echo freebsd
-      exit 0
+   suse)
+      cat /etc/SuSE-release
    ;;
-   OpenBSD)
-      echo openbsd
-      exit 0
-   ;;
-   SunOS)
-      echo solaris
-      exit 0
+   ubuntu)
+      lsb_release -sr
    ;;
 esac
-
-echo "Unknown OS" >&2
-exit 1