unix2_chkpwd − helper binary that verifies the password of the current user
/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 nothing more.
unix2_chkpwd requires the following arguments:
pam_service
The name of the service using unix2_chkpwd. This is required to be one of the services in /etc/pam.d
username
The name of the user whose password you want to verify.
unix2_chkpwd 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
Emily Ratliff.