Expect spawned snx process dies

Question

I am trying to automate the establishment of a VPN connection that uses snx.

Was hoping someone could help figure out why in the below expect script, the spawned snx process just dies expect reaches 'expect eof'. If I run the below script and watch ps -auxef, I can see that the snx connection gets established, but then dies as soon as that line is reached.

#!/usr/bin/expect

log_user 0
send_user "attempting to establish vpn connection..."
spawn snx -s server.com -p 443 -u myuser
expect {
        "Please enter your password:\n" {
                send "password123\r"
                expect eof
                send_user "successful\n"
                exit 0
        }
        eof {
                send_user "vpn is already connected\n"
                exit 0
        }
}

The weird thing is that if I run the snx command manually and enter the password, it runs fine.

Another weird thing is this issue is only seen when I run it from an ssh session into a Fedora 17 box, however when I run on my local machine (Fedora 18), it runs 100% fine. Any ideas? Any help is appreciated!

So, after hours of trying to debug this, I settled for a workaround of a heredoc to send the password in. Surprisingly it works just fine. I am still curious about the answer to the original question though. — SS781, Jan 11 '14 at 22:05

score 2 · Answer 1 · edited Mar 14 '14 at 06:19

2

Please do like

spawn -ignore HUP /bin/sh -c "snx -s xxx.xxx.xxx.xxx -u vpn_account"

This will prevent the termination

edited Mar 14 '14 at 06:19

Narendra

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answered Mar 14 '14 at 05:57

gan yew

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please use code block when you have some code in your answer/question. – Narendra Mar 14 '14 at 06:18

Expect spawned snx process dies

1 Answers1