How to get the complete output from expect when the internal buffer size of expect_out(buffer) size exceeds? - tcl

Question

I dont know whats happening but i am not getting the complete output from the remote command executed possibly because expects internal buffer is getting execceded.
proc SendCommands { Commands } {
global prompt log errlog
foreach element [split $Commands ";"] {
expect {
-re $prompt
{send -- "$element\r"}
}
set outcome "$expect_out(buffer)"
foreach line [split $outcome \n] {
foreach word [regexp -all -inline {\S+} $line] {
if {( [string index [string trimleft $line " "] 0 ] == "%")} {
puts "$outcome"
exit 1
}
}
}
puts "$outcome"
}
}
set timeout 30
foreach host [ split $hosts "\;" ] {
spawn ssh -o "StrictHostKeyChecking no" "$username#$host"
match_max 10000000
expect {
timeout { send_user "\nFailed to get password prompt\n"; exit 1 }
eof { send_user "\nSSH failure for $host\n"; exit 1 }
"*?assword:*"
{
send -- "$password\r"
}
}
expect {
timeout { send_user "\nLogin incorrect\n"; exit 1 }
eof { send_user "\nSSH failure for $host\n"; exit 1 }
-re "$prompt"
{ send -- "\r" }
}
set timeout 300
SendCommands "$Commands"
}
this is how i am executing it :
./sendcommand aehj SWEs-elmPCI-B-01.tellus comnet1 "terminal length 0;show int description" "(.*#)$"
i am getting the complete output only when i remove log user 0 but when i use the puts command in the fucnction sendcommands above i get about 90 percent of it with 10 percent
of the trailing data at the end is not shown.
one way i am thinking is to use negation of regex in expect but it doesn't seem to work.
expect {
-re ! $prompt
{puts $expect_outcome(buffer)}
}
EDIT :I get all the output once when its executed about 5 or 7 times

Answer 1

After a little search i came up with this and seems to work but let me know of any execptions or better answers :
I set match_max = 1000 then
expect {
-re $prompt
{send -- "$element\r"}
full_buffer {
append outcome $expect_out(buffer)
exp_continue
}
}
append outcome $expect_out(buffer)
puts $outcome
but still when i set match_max = 10000 or 100 it fails again