use DDD deugger to sort out exact problem. for more infi about DDD type "info DDD" or look at www.gnu.org/software/ddd
From: Sandip Bhattacharya <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
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Subject: [ilugd]: Problem using Expect with a daemon
Date: Fri, 8 Nov 2002 06:18:49 +0530
[I am not sure whether writing an expect script merits a LIP
post. Anyways.]
I am using Expect to automate a program but facing a problem right now.
The problem is that the program is supposed to receive the input(a password)
and then fork off and daemonise. Also, the program uses /dev/tty for reading
the password and writing the prompt.
By using strace on the Expect script, I can find out that the expect script is receiving
and replying correctly to the program prompts. However, as soon as the
expect script finishes, the daemon also gets killed.
After a manual execution of the daemon program, a "ps" shows that
the daemon is attached to a terminal. Therefore this dumb daemon
program is /not/ using a double-fork() and detaching itself from
its controlling terminal. So I suspect that on abortion of the Expect
script, the daemon is receiving a SIGHUP and exiting.
How can I coerce Expect to solve this problem?
- Sandip
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