Script to monitor error in log file
#!/bin/bash
#####
#
The Script will check the pattern in mentioned file
# Author: Shankar Patel
################################################################################
function
help {
echo "The plugin will check
the pattern in mentioned file
Usage:
$0 -p <Pattern> -f
<file>
Options:
p - Patern to be matched
f - file to monitor given
pattern.
h - help.
examples:
$0 -p 'file' -f
/var/log/messages
OK. 'file' not found in
/var/log/messages | error_found=0"
exit 3;
}
while
getopts "p:f:h" OPT; do
case $OPT in
"p")
PATTERN=$OPTARG;;
"f")
FILE2TAIL=$OPTARG;;
"h") help ;;
esac
done
if
[ "$PATTERN" = "" ] || [ "$FILE2TAIL" =
"" ] ; then help ; fi
FPATH=$(dirname
$FILE2TAIL)
FFILE=$(basename
$FILE2TAIL)
INODE_NUM=$(ls
-i ${FPATH}/${FFILE} | awk '{ print $1 }')
PATTERN_CODE="$(echo
-n "$PATTERN"|tr -d \* | tr -d ' ' | tr -d \. )"
FSIZE_FILE=${FPATH}/.${FFILE}_${PATTERN_CODE}_${INODE_NUM}.size
SIZE_CURRENT=$(ls
-l ${FPATH}/${FFILE} | awk '{ print $5 }')
exit_status=0
last_exit()
{#
save current size
ls -l ${FPATH}/${FFILE} | awk '{
print $5 }' > ${FSIZE_FILE}
/bin/rm -f /tmp/ts$$ /tmp/tsF$$
exit $exit_status
}
if
[ ! -f ${FSIZE_FILE} ]; then
# first time, save line count
echo "OK. saving initial size
of ${FPATH}/${FFILE} | error_found=0"
last_exit
fi
#
last size is available
SIZE_LAST=$(cat
${FSIZE_FILE})
SIZE_DELTA=$(($SIZE_CURRENT
- $SIZE_LAST))
if
[ $SIZE_DELTA -gt 0 ]
then
# new bytes to scan
tail "-${SIZE_DELTA}c"
${FPATH}/${FFILE} > /tmp/ts$$
egrep "$PATTERN"
/tmp/ts$$ > /tmp/tsF$$
GREP_STATUS=$?
if [ $GREP_STATUS -eq 0 ]
then
echo "CRITICAL.
'$PATTERN' found in '${FFILE}' file | error_found=1"
exit_status=2
last_exit
else
# found no matches
echo "OK. '$PATTERN'
not found in '${FFILE}' file | error_found=0"
exit_status=0
last_exit
fi
else
# found no matches
echo "OK. '$PATTERN' not found
in '${FFILE}' file | error_found=0"
exit_status=0
last_exit
fi
