-CERROR="\e[1;31m" # red
-CWARNING="\e[1;33m" # yellow
-CMSG="\e[1;32m" # green
-CINFO="\e[1;96m" # light blue
-CDEBUG="\e[1;94m" # blue
-CNORMAL="\e[0;39m" # default system console color
-CDONE="\e[1;32m" # green
-CPASS="\e[1;32m" # green
-CFAIL="\e[1;31m" # red
-CCMD="\e[1;35m" # pink
+if expr match "$(readlink -f /proc/$$/fd/1)" '/dev/pts/[0-9]\+' > /dev/null && \
+ expr match "$(readlink -f /proc/$$/fd/2)" '/dev/pts/[0-9]\+' > /dev/null; then
+ CERROR="\e[1;31m" # red
+ CWARNING="\e[1;33m" # yellow
+ CMSG="\e[1;32m" # green
+ CINFO="\e[1;96m" # light blue
+ CDEBUG="\e[1;94m" # blue
+ CNORMAL="\e[0;39m" # default system console color
+ CDONE="\e[1;32m" # green
+ CPASS="\e[1;32m" # green
+ CFAIL="\e[1;31m" # red
+ CCMD="\e[1;35m" # pink
+fi