Expect: Prompt extending to next line - shell

Question

I am trying to install a software which is a shell script file. I am using expect to do the silent installation.
There is a strange line during the installation of the software where the prompt goes to the next line like this below.
ENTER AN ABSOLUTE PATH, OR PRESS <ENTER> TO ACCEPT THE DEFAULT
:
So I have tried with these 2 options, but it's NOT working!
1. expect " : " { send "/home/tester/IDir\r" }
2. expect "ENTER AN ABSOLUTE PATH, OR PRESS <ENTER> TO ACCEPT THE DEFAULT\
: " { send "/home/tester/IDir\r" }
Expect File
#!/usr/bin/expect -f
#Taking arguments from test.sh file
set File [lindex $argv 0]
set IDir [lindex $argv 1]
spawn sh /home/tester/$File
expect "PRESS <ENTER> TO CONTINUE: " { send "\n" }
exp_internal 1
expect -re "TO ACCEPT THE DEFAULT\r\n.*?:" { send "/home/tester/IDir\r" }
#expect " : " { send "/home/tester/IDir\r" }
expect "IS THIS CORRECT? (Y/N): " { send "Y\n" }
expect "PRESS <ENTER> TO CONTINUE: " { send "\n" }
sleep 2
expect "ENTER THE NUMBER OF THE DESIRED CHOICE: " { send "2\n" }
expect "PRESS <ENTER> TO EXIT THE INSTALLER: " { send "\n" }
sleep 2
expect eof
test.sh file
dir=James/SDD
cd /home/tester
file=`ls | grep xx_yy*_linux_x86-64.bin`
expect script.exp $file $dir

Answer 1

After analyzing the logs, realized that your expect code is getting timed out for most of the cases.
# This timeout is meant for the first expect word 'PRESS <ENTER> TO CONTINUE', so it is proceeding to the next expect word 'TO ACCEPT THE DEFAULT.*?:'
expect: timed out
Gate keeper glob pattern for 'TO ACCEPT THE DEFAULT
.*?: ' is 'TO ACCEPT THE DEFAULT
You need to add the proper timeout handling for the expect statement. Default timeout is 10 seconds. You can change it in a way as follows,
set timeout 120; # Now, timeout value is 2 min
I can see that you have used sleep in some places, in the same way, do that for earlier expect commands as well. (Using timeout would be better in such cases than sleeping.)
#Taking arguments from test.sh file
set File [lindex $argv 0]
set IDir [lindex $argv 1]
# A common handler for timeout.
# Customize it as per your need.
proc my_timeout_handler {} {
puts "Timeout happened :("
exit 1
}
spawn sh /home/tester/$File
set timeout 300; # 5 mins.
expect {
"PRESS <ENTER> TO CONTINUE: " { send "\n" }
timeout {my_timeout_handler}
}
expect {
-re "TO ACCEPT THE DEFAULT\r\n.*?:" { send "/home/tester/IDir\r" }
timeout {my_timeout_handler}
}
expect {
"IS THIS CORRECT? (Y/N): " { send "Y\r" }
timeout {my_timeout_handler}
}
expect {
"PRESS <ENTER> TO CONTINUE: " { send "\r" }
timeout {my_timeout_handler}
}
expect {
"ENTER THE NUMBER OF THE DESIRED CHOICE: " { send "2\r" }
timeout {my_timeout_handler}
}
expect {
"PRESS <ENTER> TO EXIT THE INSTALLER: " { send "\r" }
timeout {my_timeout_handler}
}
expect {
eof {puts "Program completed"}
timeout {my_timeout_handler}
}