how to debug an expect script running on a tomcat server

Shell Programming and Scripting
1

Hello everyone,

I have a small expect script as follows;

#!/usr/bin/expect -f
set force_conservative 0  ;# set to 1 to force conservative mode even if
              ;# script wasn't run conservatively originally
if {$force_conservative} {
    set send_slow {1 .1}
    proc send {ignore arg} {
        sleep .1
        exp_send -s -- $arg
    }
}
set timeout -1
spawn /bin/bash
match_max 100000
send -- "su randeel\r"
expect -exact "su randeel\r
Password: "
send -- "some password\r"
expect "randeel@"
send -- "wine cmd /c wscript Z:\\\\tmp\\\\tomcat6-temp\\\\3fe21de5ca0fe5fb.vbs"
expect -exact "wine cmd /c wscript Z:\\\\tmp\\\\tomcat6-temp\\\\3fe21de5ca0fe5fb.vbs"
send -- "\r"
expect "IRemUnknown_RemRelease"
expect "IRemUnknown_RemRelease"
expect "IRemUnknown_RemRelease"
send -- "\r"
exit
expect eof

when i run this script as another user the above works great!!
But when i invoke the above script from tomcat server(using a java programme to execute the script) as user "tomcat6"
the script doesn't execute fully. How can i debug this issue?
when i issue the command ps -ef;
I see that tomcat6 user has called the script and the process is running.
i also see the bash command also invoked, also i see "su randeel" command also being running.
But i don't know how to debug this issue. I am new to expect,ubuntu.
Any kind of help would be appreciated.

Thank you,
Randeel.

2

If all else fails, you can truss, tusc or strace the tomcat process as it get the service call that runs expect, to see where it stops. Use a realistic timeout, and it may tell you where it hung.