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#!/bin/bash
#
# Copyright 2010 David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
# Distributed under the terms of the GNU General Public License v3
if [ $# != 3 ]; then
echo "$0: incorrect number of arguments" >&2
exit 1
fi
IDENTIFIER="$1"
SERVER="$2"
LOGPATH="$3"
CACHEDIR="${HOME}/.cache/lognotify"
# Setup cache directory if nonexistent.
if [ ! -d "${CACHEDIR}" ]; then
echo -n "* Creating cache directory... "
mkdir -p "${CACHEDIR}"
echo "Done"
fi
if [ ! -f "${CACHEDIR}/${IDENTIFIER}" ]; then
echo -n "* Creating cache file for log... "
touch "${CACHEDIR}/${IDENTIFIER}"
echo "Done"
fi
echo -n "* Determining number of lines in cached log... "
LINES=$(wc -l "${CACHEDIR}/${IDENTIFIER}" | cut -f1 -d' ')
echo "${LINES}"
echo -n "* Acquiring new lines via SSH... "
if [ "${LINES}" == 0 ]; then
LOGAPPEND=$(ssh ${SERVER} "cat ${LOGPATH}")
else
LOGAPPEND=$(ssh ${SERVER} "cat ${LOGPATH} | sed -e '1,${LINES}d'")
fi
echo "Done"
if [ -n "${LOGAPPEND}" ]; then
echo "* Number of new lines: $(echo "${LOGAPPEND}" | wc -l)"
echo
echo "${LOGAPPEND}" | tee -a "${CACHEDIR}/${IDENTIFIER}"
else
echo "* No new lines found."
fi
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