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Old 09-29-2009, 01:50 PM   #1
LQ Newbie
Registered: Jul 2006
Posts: 5

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Unhappy Using an expect Script to send the output of cat and append it to a file

So basically I want to append and not overwrite the output of "cat slabdebug" to outputfile.txt. Currently if I run this I do get the output written to outputfile.txt and the loop works correctly till reaching 51 but it overwrites the file and does not append it. Please help and let me know if what I want to accomplish is possible.

set timeout 10
spawn telnet <ipaddressofmymachine>
match_max 100000
sleep 2
expect "login: "
send "admin\r"
expect "password: "
send "\r"
expect "*#"
send "cd /proc\r"
expect "*#"
set i 1
while {$i < 51} {
set output [open "outputfile.txt" "w"]
sleep 2
send "cat slabdebug\n"
expect "*#"
set outcome $expect_out(buffer)
send "\r"
puts $output $outcome
incr i
close $output
expect "*#"
expect eof

Old 09-29-2009, 03:50 PM   #2
LQ Newbie
Registered: Jul 2006
Posts: 5

Original Poster
Rep: Reputation: 0
Got it

After reading I figured that changing

set output [open "outputfile.txt" "w"]
set output [open "outputfile.txt" "a+"]

it now works.


expect, linux, tcl

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