i have a file in /proc directory that stores some tcp parameters.............i heard that files in /proc directory has a 1 page size limit

how do i want to write a shell script that reads the proc file from time to time and save it as a text file, and then read some more and append whatevers new to the text file?

the file format of /proc/tcp_parameters is:
2 3 4
3 5 5
6 5 3
...

i want to read the proc file, then store it as a text file
then sometime later, like 1 or 2 sec later, read the file again and apend whatevers new to the txt file?

i tried doing

cat tcp_parameters > /home/tcpvars

but i have no idea how do deal with the time issue, and the '>' overwrites everything instead of appending

thanks in advance

try:

"while sleep 10;
do
cat tcp_parameters >> outfile
done"

sleep 10 # sleep for 10 seconds
>> # append to file

press control-C to stop the process

if you just need to observer the file you could also try:

"tail -f tcp_vars"

which prints the file continuously as it changes. But maybe this
won't work on a /proc file?


regards , billy