UNIX for Dummies Questions & Answers

if [ ${trailer} -eq $eof ]; then
echo $header
echo $trailer
fi

#!/bin/sh
file="drop/test1"
filename="2154/drop/abc.emi"
eof=`wc -l $filename | awk '{print $1;}'`
blk_val=99999
while read j
do
prev=$j
prev1=$j
blk_flag=0
loop_count=0
blk_size=0
while read j
do
 if [ ${j} -gt ${prev} ]; then
 next=$j
 blk_size=`expr $next - $prev + $blk_size + 1 `
	 if [ ${blk_size} -ge ${blk_val} ]; then
		 if [ ${blk_flag} -eq 1 ]; then
			    if [ ${loop_count} -eq 0 ]; then
				 header=$prev1
				 trailer=$next
				 prev=`expr $next + 1`
				 echo h0=$header
				 echo t0=$trailer
				 blk_size=0
				 blk_flag=0
				 loop_count=1
				 prev1=`expr $trailer + 1`
			    else 
				 prev1=`expr $trailer + 1`
				 trailer=$next
				 prev=`expr $next + 1`
				 header=$prev1
				 echo h1=$header
				 echo t1=$trailer
				 blk_size=0
				 blk_flag=0
			    fi	 
		 else 
			 header=$prev
			 trailer=$next
			 prev=`expr $next + 1`
			 blk_size=0
			 blk_flag=0
			 echo h2=$header
			 echo t2=$trailer 	        
		 fi	 
	 else
		 prev=`expr $next + 1`
		 blk_flag=1
	 fi	

 fi
done < $file      
break
done < $file

1
6
7
14
15
20
21
96
97
115
.
.
.
1322610
1322620
1322621
1322654
1322655
1322657
1322658
1322661
1322662
1322664

h0=1
t0=100008
h1=100009
t1=201120
h1=201121
t1=301524
h1=301525
t1=401938
h1=401939
t1=503160
h1=503161
t1=604185
h1=604186
t1=704649
h1=704650
t1=806089
h1=806090
t1=909204
h1=909205
t1=1009463
h1=1009464
t1=1109665
h1=1109666
t1=1210242
h1=1210243
t1=1311035


Expected O/P:
h0=1
t0=100008
h1=100009
t1=201120
h1=201121
t1=301524
h1=301525
t1=401938
h1=401939
t1=503160
h1=503161
t1=604185
h1=604186
t1=704649
h1=704650
t1=806089
h1=806090
t1=909204
h1=909205
t1=1009463
h1=1009464
t1=1109665
h1=1109666
t1=1210242
h1=1210243
t1=1311035
h1=1311036
t1=1322664