BASH:upgrade split a file into multi sub-files by the unique mark in one line which contain the keyword and the same mark will go into the same file

#!/bin/bash
#
LINE_MARK="key word to search"

DATE=$(date +%Y-%m-%d)
PRE_DIR=/data/logs/projlog
PRE_FILE=proj.log
FILES=${PRE_FILE}.${DATE}*

for f in `ls ${PRE_DIR}/${PRE_FILE} ${PRE_DIR}/${FILES}`
do

basename $f
sh ./a.sh $f $LINE_MARK

done



#!/bin/bash
#
# split a file into multi sub-files by the unique mark in one line which contain the keyword,
# the lines containing same mark will go into the same file.

#the input file to statistics
fullfilename=${1}
filename=`basename ${1}`


#the keyword to search
keyword=$2

#the path to put the output files
fullpath="$PWD"/output/"$filename"
mkdir -p "$fullpath"


for tid in `grep "$keyword" "$fullfilename" | awk -F'[' '{print $3}'|awk -F']' '{print $1}'|awk -F' ' '{print $1}'`
do
    begin=`grep "$tid" "$fullfilename" | head -n1 | awk -F' ' '{print $2}'`
    end=`grep "$tid" "$fullfilename" | tail -n1 | awk -F' ' '{print $2}'`
    ibegin=`echo ${begin//:/}`
    iend=`echo ${end//:/}`
    echo $ibegin $iend

    bh=${begin:0:2}
    bm=${begin:3:2}
    bs=${begin:6:2}
    eh=${end:0:2}
    em=${end:3:2}
    es=${end:6:2}
#    echo $bh $bm $bs $eh $em $es

    etotal=`expr $eh \* 60 \* 60 + $em \* 60 + $es`
    btotal=`expr $bh \* 60 \* 60 + $bm \* 60 + $bs`
#    echo $btotal $etotal

    timecost=`expr $etotal - $btotal`
    echo $etotal,$btotal, $timecost

   grep "$tid" "$fullfilename" > "$fullpath"/"$timecost"
done