source: udev/contrib/common/helper.functions@ 0f9d1e9

########################################################################
#
# Description : helper.functions
#
# Authors     : Jim Gifford
#
# Version     : 00.00
#
# Notes       :
#
########################################################################

# Find Logger
if [ -x /usr/bin/logger ]; then
        LOGGER=/usr/bin/logger
elif [ -x /bin/logger ]; then
        LOGGER=/bin/logger
else
        unset LOGGER
fi

# Output Routine
if [ -t 1 -o -z "$LOGGER" ]; then
        mesg () {
                echo "$@"
        }
else
        mesg () {
                $LOGGER -t $(basename $0)"[$$]" "$@"
        }
fi

debug_mesg () {
        test "$DEBUG" = "" -o "$DEBUG" = no && return
        mesg "$@"
}