system: improve opnsense-log a little

src/sbin/opnsense-log

@@ -23,10 +23,42 @@
 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 # POSSIBILITY OF SUCH DAMAGE.
 
+DO_COMMAND=cat
+DO_LIST=
+
+while getopts fl OPT; do
+	case ${OPT} in
+	f)
+		DO_COMMAND="tail -F -n0"
+		;;
+	l)
+		DO_LIST="-l"
+		;;
+	*)
+		echo "Usage: man ${0##*/}" >&2
+		exit 1
+		;;
+	esac
+done
+
+shift $((${OPTIND} - 1))
+
 LOGTYPE=${1:-system}
 
-# XXX small POC for now, possible target list via
-#
-#     find /var/log -name latest.log
+LOGFILE="/var/log/${LOGTYPE}/latest.log"
+LOGLIST=$(find -s /var/log -name latest.log)
 
-tail -f "/var/log/${LOGTYPE}/latest.log"
+if [ -n "${DO_LIST}" ]; then
+	for LOG in ${LOGLIST}; do
+		DIR=$(dirname ${LOG})
+		echo ${DIR##*/}
+	done
+	exit
+fi
+
+if [ ! -e "${LOGFILE}" ]; then
+	echo "No corresponding log '${LOGTYPE}' was found." >&2
+	exit 1
+fi
+
+${DO_COMMAND} "${LOGFILE}"