Support systemd-style output via lsb-functions

By properly hooking into /etc/grml/lsb-functions
we can get systemd like output without having to
rewrite any further scripts.

Adjust /etc/grml_colors to have same color style
(non-highlighted colors) as systemd iff running
under systemd.

etc/grml/lsb-functions

@@ -30,6 +30,12 @@
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 
+if [ "$(cat /proc/1/comm 2>/dev/null)" = "systemd" ] ; then
+  SYSTEMD=true
+else
+  SYSTEMD=false
+fi
+
 # log_*() functions {{{
 TPUT="${TPUT:-"/usr/bin/tput"}"
 
@@ -408,4 +414,27 @@ ewend() {
 }
 #}}}
 
+# if we're using systemd then redfine functions for
+# output in systemd style
+if $SYSTEMD ; then
+  einfo() {
+    printf "[  ${GREEN}OK${NORMAL}  ] %s\n" "$*"
+  }
+
+  ewarn() {
+    printf "[ ${YELLOW}WARN${NORMAL} ] %s\n" "$*"
+  }
+
+  eerror() {
+    printf "[ ${RED}FAIL${NORMAL} ] %s\n" "$*"
+  }
+
+  eend() {
+    :
+  }
+fi
+
+# don't expose unneeded local variables
+unset SYSTEMD
+
 # vim: ft=sh tw=80 ts=4 foldmethod=marker

etc/grml_colors

@@ -5,22 +5,32 @@
 # License:       This file is licensed under the GPL v2.
 ################################################################################
 
+# don't use highlighed colors under systemd to match its style
+if [ "$(cat /proc/1/comm 2>/dev/null)" = "systemd" ] ; then
+  HIGHLIGHT=0
+else
+  HIGHLIGHT=1
+fi
+
 # ANSI COLORS
 CRE=""
 NORMAL=""
 # RED: Failure or error message
-RED=""
+RED="[${HIGHLIGHT};31m"
 # GREEN: Success message
-GREEN=""
+GREEN="[${HIGHLIGHT};32m"
 # YELLOW: Descriptions
-YELLOW=""
+YELLOW="[${HIGHLIGHT};33m"
 # BLUE: System messages
-BLUE=""
+BLUE="[${HIGHLIGHT};34m"
 # MAGENTA: Found devices or drivers
-MAGENTA=""
+MAGENTA="[${HIGHLIGHT};35m"
 # CYAN: Questions
-CYAN=""
+CYAN="[${HIGHLIGHT};36m"
 # BOLD WHITE: Hint
-WHITE=""
+WHITE="[${HIGHLIGHT};37m"
+
+# don't expose unneeded local variables
+unset HIGHLIGHT
 
 ## END OF FILE #################################################################