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Full Discussion: Piping to a python script
Top Forums Shell Programming and Scripting Piping to a python script Post 302690585 by gplayersv on Thursday 23rd of August 2012 07:24:25 AM
Old 08-23-2012
Piping to a python script

Hello,

I have a python script (not created by me), let's call it myscript, which I call with several parameters. If I don't provide the --password parameter, the script will ask the user to input the password.
So I run the script like this:
Code:
/wherever/myscript --username=whoever /some/other/path/parameter

That makes it ask for a password and wait for user input. If I enter the wrong password an error message will be displayed.
I want to pipe to this script some preset text to enter as the password, so that I can mimic entering an invalid password by hand.
Code:
echo 'wrongpassword' | /wherever/myscript --username=whoever /some/other/path/parameter

This unfortunately doesn't generate the same behaviour, as if it would be manually entered.
Can I simulate this behaviour with pipes/redirecting output? Why doesn't it work? I expect that the 'wrongpassword' text will be entered when the script asks for the password, but it seems I'm wrong.

Thanks!
 

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SKEYINIT(1)						    BSD General Commands Manual 					       SKEYINIT(1)

NAME
skeyinit -- change password or add user to S/Key authentication system SYNOPSIS
skeyinit [-sxz] [-k passphrase] [-n count] [-p password] [-t hash] [user] DESCRIPTION
skeyinit initializes the system so you can use S/Key one-time passwords to login. The program will ask you to enter a secret pass phrase; enter a phrase of several words in response. After the S/Key database has been updated you can login using either your regular password or using S/Key one-time passwords. skeyinit requires you to type a secret password, so it should be used only on a secure terminal. OPTIONS
-k passphrase Use pass phrase passphrase instead of asking for one to be entered. -n count Start the skey(1) sequence at count (default is 100). -p password Use password password instead of asking for one to be entered. -s allows the user to set the seed and count for complete control of the parameters. To do this run skeyinit in one window and put in your count and seed; then run skey(1) in another window to generate the correct 6 english words for that count and seed. You can then ``cut-and-paste'' or type the words into the skeyinit window. -t hash Selects the hash algorithm to use. Available choices are md4 (the default), md5, or sha1. -x Displays one-time password in hexadecimal instead of ASCII. -z Allows the user to zero their S/Key entry. user The username to be changed/added. By default the current user is operated on, only root may change other user's entries. FILES
/etc/skeykeys database of information for the S/Key system. SEE ALSO
skey(1), skeyaudit(1), skeyinfo(1) AUTHORS
Phil Karn Neil M. Haller John S. Walden Scott Chasin BSD
September 19, 2005 BSD
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