+# cx: Lines of context; sl: Matching lines; mt: Search string; fn: Filename
+# ln: Line number; bn: Byte offset; se: Separators.
+colours=$(tput colors)
+if [ $colours = 256 ]; then
+ export GREP_COLORS='cx=38;5;246:sl=:mt=33:fn=38;5;25:ln=38;5;82:bn=33:se=38;5;246'
+elif [ $colours -gt 88 ]; then
+ export GREP_COLORS='cx=38;5;84:sl=:mt=33:fn=38;5;22:ln=38;5;44:bn=33:se=38;5;84'
+else
+ export GREP_COLORS='cx=31:sl=:mt=33:fn=36:ln=34:bn=33:se=31'
+fi
+
+# Override SCREENDIR iff screen is not setuid.
+screen=$(which screen &>/dev/null)
+if [ ! -z "$screen" ]; then
+ if ! ls -l "$screen" | cut -d ' ' -f 1 | grep s >/dev/null; then
+ export SCREENDIR="$HOME/.screen/$HOSTNAME"
+ fi
+fi
+unset screen
+#mkdir -p "$SCREENDIR"