topic Re: unix script in Operating System - HP-UX

unix script

Jade Bulante — Mon, 09 Jul 2001 15:50:01 GMT

I'm writing a unix script that starts up a program called pgp. When it starts up it asks me a question that I would want to answer "yes" all the time. Can you help me??

Re: unix script

James R. Ferguson — Mon, 09 Jul 2001 15:57:32 GMT

Hi Jade:

I'm going to assume that the program does a "read" looking for the "yes" response. In that case, put "yes" into a file and redirect that file, like this:

# ./mything < ./myresponse

...JRF...

Re: unix script

A. Clay Stephenson — Mon, 09 Jul 2001 15:57:34 GMT

Hi:

I don't suppose it could be as simple as
echo "yes" | command

If you have more than one line you could build a tempfile
echo "yes" > /tmp/yn
echo "no" >> /tmp/yn
echo "exit" >> /tmp/yn

command < /tmp/yn
rm /tmp/yn

Clay

Re: unix script

A. Clay Stephenson — Mon, 09 Jul 2001 16:06:29 GMT

Hi Jade:

PGP usually allows the '--batch' option which suppresses all interacxtive input. This may fix you.

Clay

Re: unix script

Joseph C. Denman — Mon, 09 Jul 2001 16:24:58 GMT

you could try:

/what/ever/dir/pgp << EOF
yes
EOF

...jcd...

Re: unix script

Jade Bulante — Mon, 09 Jul 2001 17:19:50 GMT

I tried the steps you guys gave me but pgp is still waiting for a "yes" response.

I tried all of them.
It's asking "do you want to use this public key?" and I need a "yes" response.

Re: unix script

Joseph C. Denman — Mon, 09 Jul 2001 17:27:35 GMT

This is not a gui program is it?

All of these response should have worked.

Exactly how are you starting the program?

...jcd...

Re: unix script

Satish Y — Mon, 09 Jul 2001 17:31:19 GMT

Your script may need multiple responses...

try with:

/dir1/pgp << !
yes
yes
!

you may use multiple "yes", there is no harm...

Cheers...
Satish.

Re: unix script

A. Clay Stephenson — Mon, 09 Jul 2001 17:35:25 GMT

Hi Jade:

The fundamental problem is that this input is not coming from stdin but another file descriptor. You could probably use lsof to determine the fdes and then within the shell do an exec 4
But a better way is to use the correct options for pgp. This site contains the documentation you need and in particular how to run pgp in an automated environment:
http://www.gnupg.org

Re: unix script

Jade Bulante — Mon, 09 Jul 2001 17:36:16 GMT

I'm starting the program by calling a script called script:
In that script file is the following

pgp -e filename username

This geberates the question that I have to answer with a "yes".

Re: unix script

John Poff — Mon, 09 Jul 2001 17:47:05 GMT

Hello,

You might need to look at using a program like 'expect', which uses a scripting language to provide input for interactive programs. We used it at my last job to automate building Unix systems; we used it to allow a script to run the 'passwd' program to automatically generate user passwords (this was another flavor of Unix).

You can get 'expect' from the HP-UX Porting and Archive Centre at this URL:

http://gatekeep.cs.utah.edu/hppd/hpux/Tcl/expect-5.31/

JP