find the position in a file and insert the data there

UNIX HP-UX
1

Hi,

I have a EDI data file ARROWTEST of size 18246 characters. And I want to insert some data after 4200 position in the file. How I can find the position 4200 in that file....Please advise.

Regards,

2

Try using split -b, e.g...

split -b 4200 infile  tmpfile.
for file in tmpfile.??
do
    cat $file
    if [[ $file = tmpfile.aa ]]
    then
       printf "additional data goes here"
    fi
done > outfile
rm tmpfile.??
3

this would reduce the overhead of file comparison,
once data is pumped after 4200 bytes,

>w.ksh

split -b 4200 infile  tmpfile.
cat tmpfile.aa
echo "pump data"
cat tmpfile.a[!a] 

>./w.ksh > outputfile

but would file for split commands generating more than 26 files...

4

I fail to see the point of changing my script to one that is uglier, more limited and leaves temp files behind.

5

yes,

i should have included
/bin/rm tmpfile.??

If that is so... how would your current script handle situations if it had to generate more than 676 files? (Anyway solution to that bottleneck is also available)

6

Your script is limited to 26 files and mine is limited to 676 files. So your script is more limited.