code to read block from the file

suchi_s · 09-08-2004, 05:31 AM

read similar blocks from a file
whose first line contains "occupancy"
and last line also contains "block"
in shell scripting

chrism01 · 09-08-2004, 05:35 AM

more details/example needed....

suchi_s · 09-08-2004, 05:41 AM

INPUT FILED
DJKD
DEJKFL
OCCUPANCY OF DATA
EIUR
REJR
EJR
END OF REPORT
HFJDF
FKDFJ
OCCUPANCY OF DATA
DJEKFO
FRJFT
ERKJ
FREOK
END OF REPORT

HOW TO EXTRACT BLOCKS AND PUT IN ANOTHER FILE

anon237 · 09-08-2004, 05:48 AM

This should work:

sed -n '/OCCUPANCY/,/REPORT/p'

Hope this helps.

suchi_s · 09-08-2004, 06:06 AM

this is solved for constant file size
what if the file size is increasing after every second and at times half of the block is come at particular instant and rest is coming in next interval..
how to track the file and the blocks

chrism01 · 09-08-2004, 06:21 AM

If I understand you correctly, you want to read data blocks from a file that is still open and being written to ....
If you can't wait until it is finished and closed, I think it will be very difficult if not impossible to do in shell.
On the other hand, here is a solution in Perl: http://iis1.cps.unizar.es/Oreilly/pe...ok/ch08_06.htm