[Gllug] non-interactive passwd

[Alain Williams]

On Thu, May 08, 2003 at 04:12:14PM +0100, John Edwards wrote:
> On Thu, May 08, 2003 at 01:09:18PM +0100, Tethys wrote:
> > 
> > Murray Peterson writes:
> > 
> > >passwd $USER $PASSWORD or passwd $USER << echo $PASSWORD
> > >
> > >I am trying to do this on solaris and aix, but I would imagine that
> > >linux would have much the same reaction :)
> > 
> > Actually no. Under Linux, it's easy because passwd accepts a --stdin
> > option to accept piped input from elsewhere:
> > 
> > 	echo $password | passwd --stdin $user
> > 
> > Solaris and AIX aren't so accomodating. You might want to try building
> > the Linux passwd on ther other OSen, and see if you can get it to work
> > that way.
> > 
> > Tet
> 
> Hi
> RedHat's passwd program can do stdin, but not the one in Debian (as 
> of 3.0) or SuSE (as of 7.1).

Please find attached an expect script that I use to set a password.

The user 'visitor' has their password changed to $NEWPASS

Enjoy

-- 
Alain Williams

#include <std_disclaimer.h>

FATHERS-4-JUSTICE - Campaigning for equal rights for parents and the
best interests of our children. See http://www.fathers-4-justice.org
-------------- next part --------------
#!/usr/bin/expect -f
# SCCS: @(#)SetVisitorPassword	1.1 11/08/02 17:59:17
# A D D Williams, November 2002.
# Need lots of sleeps, this is because the passwd program will flush input,
# so if we send it too early, it won't see anything

# Stop the trace of the chat with 'passwd' from being echoed to stdout:
log_user 0

# spawn -noecho strace -o /tmp/pass passwd addw
spawn -noecho passwd visitor

set timeout 5

set newpass $env(NEWPASS)

#send_user "set 1st\n"
expect {
	"word:" {
		sleep 2
		send "$newpass\n"
	}
	eof {
		send_user "EOF from 'passwd' when waiting for first prompt\n"
		exit
	}
	timeout {
		send_user "Timeout from 'passwd' when waiting for first prompt\n"
		exit
	}
}

# send_user "set 2nd\n"

expect {
	"word:" {
		sleep 2
		send "$newpass\n"
	}
	eof {
		send_user "EOF from 'passwd' when waiting for second prompt\n"
		exit
	}
	timeout {
		send_user "Timeout from 'passwd' when waiting for second prompt\n"
		exit
	}
}

expect {
	"successfully" {
		# send_user "Done\n";
	}
	eof {
		send_user "EOF from 'passwd' when waiting for confirmation of change\n"
		exit
	}
	timeout {
		send_user "Timeout from 'passwd' when waiting for confirmation of change\n"
		exit
	}
}

# end