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Passing output to another applications input?


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 PostPosted: Thu Nov 12, 2009 4:09 pm   

Joined: Thu Nov 12, 2009 3:55 pm
Posts: 1
Hello,

I am not sure if that Subject really explains it, basically I have a script that executes a program that requires a passphrase from the user. I can easily execute this by issuing the -p argument followed by the passphrase however that shows up on possible logs or at least on the results of the ' ps ' command. If you do not supply this -p argument it provides a new line with the echo " Enter Passphrase: " and asks for input.

My question is how can I provide a result/input for the Passphrase request and is it still possible to throw this application in the background with the ' & ' following the command?


Example of original:
Code:
#!/bin/bash

...

echo "Attempting connection to Service ";
/usr/local/test/javatestfile -u $username -p $passphrase &

...



All comments/suggestions appreciated.


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 PostPosted: Mon Nov 30, 2009 1:39 am   
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Joined: Sat Jun 13, 2009 8:53 pm
Posts: 73
Location: Texas!
You're probably going to want to use expect here.

Google around for tutorials on using it, but you can find the expect man page here: http://linux.die.net/man/1/expect

Basically, you can set it up to wait for the " Enter Passphrase: " prompt and then prompt the user for a password. I'm not an expert on using it, otherwise I would try to flesh it out more for you. But, if you try to implement this and run in to trouble, I would be glad to try to answer any more questions about using it.

- thobbs


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