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help with redirectioning output
Posted by pmnf (pmnf), 22 July 2004
I ppl im new to expect and to this forum. this as you can see my first post of many 
My problem is the folowing.
i want to connect to a remote machine via telenet run a script name extract.sh grab the output of the script and store it in a file.
In this moment i am doing the folowing
#!/usr/bin/expect -f
#
log_file -a MY_OUTPUT
set user xpto
set password xpto
set site remote.address.pt
set VAR 1
set T 0
spawn telnet $site
while {$VAR>0} {
#puts $VAR
expect {
"login:" {
set rcvd $expect_out(buffer)
send "$user\r"
}
"$user's Password:" {
send "pulso.2\r"
send "\n"
send "cd nagios ;"
set rcvd $expect_out(buffer)
expect {
"bash#" {
send "./extract.sh\r"
}
}
}
}
if {$T>3} exit
incr T
}
exit
############
this is working but i think this isnt very good programing.
what i really want to do is to run the program like this
$ program.excpt >> AFILE &
"AFILE : contains the result of the extract.sh
Any ideas
Posted by admin (Graham Ellis), 23 July 2004
I think you want to a) start with
log_user 0
to turn off echo to stdout of all the text that comes back before you run your ./extract.sh
b) add an extra expect after your
send ./extract.sh
to cause expect to wait for the next shell prompt, then when you have it add a
puts $expect_out(buffer)
to send your output to stdout ... which your >> will cause to be redirected onto the end of the file at runtime. You may need / want to puts an extra newline, datestamp, or header too so that you can easily analyse your logfile later on.
Graham
P.S. Test it without the log_user line at first when you add the extra code in - otherwise if you have any bugs that cause the carefully choreographed exchange to fail, you won't know where they are.
Posted by pmnf (pmnf), 23 July 2004
Thanks working allreadyThis page is a thread posted to the opentalk forum
at www.opentalk.org.uk and
archived here for reference. To jump to the archive index please
follow this link.
| Comment: "Please describe how you did the redirection using a code ..." Visitor Ranking 5.0 (5=excellent, 1=poor) | ||
Comment by Sathya (published 2011-08-18)
Please describe how you did the redirection using a code snippet. [#3969]
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