diff --git a/contrib/scripts/NM-log b/contrib/scripts/NM-log
index 608fc386ab..7a35b17b10 100755
--- a/contrib/scripts/NM-log
+++ b/contrib/scripts/NM-log
@@ -13,7 +13,13 @@
 #
 # You can pass multiple filenames.
 
-show-journal() {
+if [[ "$_" == "$0" ]]; then
+    NM_not_sourced=1
+else
+    unset NM_not_sourced
+fi
+
+NM-show-journal() {
     local since="$(systemctl show NetworkManager | sed -n 's/^ExecMainStartTimestamp=\(.*\) [A-Z0-9]\+$/\1/p')"
 
     if [[ "$since" == "" ]]; then
@@ -24,29 +30,37 @@ show-journal() {
     fi
 }
 
-colorize() {
+NM-colorize() {
     if [[ "$NM_LOG_NO_COLOR" == "" ]]; then
-        GREP_COLOR='01;33' grep --color=always '^\|^\(.* \)\?<\(warn>\|info> \|error>\) \(.*\<is starting\>.*$\)\?' | \
-        GREP_COLOR='01;37' grep --color=always '^\|\<platform: signal: .*$' | \
-        GREP_COLOR='01;34' grep --color=always '^\|\<platform-linux: link: change \|\<platform: link: setting .*$\|\<platform: \(route\|address\): .*$\|\<platform-linux: sysctl: setting .*$' | \
-        GREP_COLOR='01;35' grep --color=always '^\| audit: .*$' | \
-        GREP_COLOR='01;32' grep --color=always '^\|\<device (.*): state change: '
+        # poor man's coloring using grep.
+        # TODO: do it somehow better (and more efficient).
+        GREP_COLOR='01;33' grep -a --color=always '^\|^\(.* \)\?<\(warn>\|info> \|error>\) \(.*\<is starting\>.*$\)\?' | \
+        GREP_COLOR='01;37' grep -a --color=always '^\|\<platform: signal: .*$' | \
+        GREP_COLOR='01;34' grep -a --color=always '^\|\<platform-linux: link: change \|\<platform: link: setting .*$\|\<platform: \(route\|address\): .*$\|\<platform-linux: sysctl: setting .*$' | \
+        GREP_COLOR='01;35' grep -a --color=always '^\| audit: .*$' | \
+        GREP_COLOR='01;32' grep -a --color=always '^\|\<device (.*): state change: '
     else
-        cat -
+        /usr/bin/cat -
     fi
 }
 
-(
-    if [ "$1" == "j" ]; then
-        shift
-        show-journal "$@"
-    elif [ "$#" -eq 0 -a -t 0 ]; then
-        show-journal
-    else
-        a="${1--}"
-        shift
-        /usr/bin/cat "$a" "$@"
-    fi
-) | \
-    colorize | \
-    LESS=FRSXMK exec less -R
+NM-log() {
+    (
+        if [ "$1" == "j" ]; then
+            shift
+            NM-show-journal "$@"
+        elif [ "$#" -eq 0 -a -t 0 ]; then
+            NM-show-journal
+        else
+            a="${1--}"
+            shift
+            /usr/bin/cat "$a" "$@"
+        fi
+    ) | \
+        NM-colorize | \
+        LESS=FRSXMK exec less -R
+}
+
+if [[ "$NM_not_sourced" != "" ]]; then
+    NM-log "$@"
+fi