Shell Programming and Scripting

Hello everybody,

I have a question about I/O redirection within a coprocess.
I want to setup a coprocess and then redirect output to a file on a remote machine.

Here's some Perderabo code modified

exec 4>&1


#
# Section 1 --- Prove that we can talk with the hosts in HOSTLIST
# Part 1 --- telnet to each and touch a file

for HOST in $HOSTLIST ; do
telnet $HOST >&4 2>&4 |&
sleep $DELAY
print -p cd /destiny
sleep $DELAY
print -p sed 's/bla/bli/' somefile > somefile_new
sleep $DELAY
print -p mv somefile_new somefile
sleep $DELAY
print -p exit
wait
done


The I/O redirection seems to disappear in the coprocess. Can someone point me to a solution in this matter.

Thanx Mugin

Ahem...that i/o redirection works fine for me. It causes the output of the telnet session to appear on the screen just as it was supposed to do. Without the redirection, I would need to do a "read -p" for each line. That is the normal case for a coprocess. You do stuff like this:

bc |&

print -p 1 + 2
read -p result
echo $result

I don't understand what you plan on trying. Redirecting to a file on a remote system will require nfs or something.

Perderabo, thanx for your fast reply.

Let me explain what i want to do.
I want to edit a file with sed on some remote machines.
Everything works fine, also the sed command output, but the ">"
part after sed does not seem to work ( i do not get any output from that part).
Should i write a little sed script before, set up a coprocess for ftp and then send the script over in order for the telnetcoprocess to execute it?

Mugin

I don't understand what you are trying to do. Post your script. Maybe that will help.

Are you sure telnet is the correct program to use for running processes remotely on another machine?

Shouldn't you be trying to use something like remsh?