Sequence files

[oznasuer]

How can I find the missing sequence in a file list with a "for" or a "while" command?
For example:
5995
5996
5997
5998
5999
6001
6002

I want to find the missing sequence at this list using "for" or "while".
Thanks for your helps.

 

[gregor weertman]

Hello oznasuer,

ox=0
while read xx
do
nx=`expr $ox + 1`
if [ $xx -ne $nx ] ;then
echo $xx $ox
fi
ox=$xx
done < seqfile

regards Gregor.

Gregor.Weertman@mailcity.com

 

[oznasuer]

Thanks Gregor.

 

[pdagulb]

Hello oznasuer,
seqfile contains
5995
5996
5997
5998
5999
6001
6002

#!/bin/ksh
#Script to find the missing sequence in file of numerals

tmpfile=`cat seqfile`
tmpfile2=`cat seqfile`
flag=0

echo the missing sequence is

for num in $tmpfile
do

tmpnum=$num
tmpnum=`expr $tmpnum + 1 `


for num2 in $tmpfile2
do

if [ $num2 -eq $tmpnum ]
then
flag=1
break
else
flag=0
continue
fi


done

if [ $flag -ne 1 ]
then
tt=`expr $tmpnum + 1 `
echo $tmpnum
else
continue
fi

done

#end of the script



the output is like this:
the missing sequence
6000
6003

cheers,
Santosh.K.B