unix2_chkpwd - helper binary that verifies the password of the current
/sbin/unix2_chkpwd servicename username
unix2_chkpwd is a helper program for applications that verifies the
password of the current user. It is not intended to be run directly
from the command line and logs a security violation if done so.
It is typically installed setuid root or setgid shadow and called by
applications, which only wishes to do an user authentification and
unix2_pwdchk requires the following arguments:
The name of the service using unix2_chkpwd. This is required to
be one of the services in /etc/pam.d
The name of the user whose password you want to verify.
unix2_pwdchk expects the password via stdin.
unix2_chkpwd has the following return codes:
1 unix2_chkpwd was inappropriately called from the command line or
the password is incorrect.
0 The password is correct.
Written by Olaf Kirch loosely based on unix_chkpwd by Andrew Morgan