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.\"     Title: unix_chkpwd
.\"    Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/>
.\"      Date: 10/27/2010
.\"    Manual: Linux-PAM Manual
.\"    Source: Linux-PAM Manual
.\"  Language: English
.\"
.TH "UNIX_CHKPWD" "8" "10/27/2010" "Linux-PAM Manual" "Linux\-PAM Manual"
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.\" -----------------------------------------------------------------
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.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "Name"
unix_chkpwd \- Helper binary that verifies the password of the current user
.SH "Synopsis"
.fam C
.HP \w'\fBunix_chkpwd\fR\ 'u
\fBunix_chkpwd\fR [\&.\&.\&.]
.fam
.SH "DESCRIPTION"
.PP

\fIunix_chkpwd\fR
is a helper program for the
\fIpam_unix\fR
module that verifies the password of the current user\&. It also checks password and account expiration dates in
\fIshadow\fR\&. It is not intended to be run directly from the command line and logs a security violation if done so\&.
.PP
It is typically installed setuid root or setgid shadow\&.
.PP
The interface of the helper \- command line options, and input/output data format are internal to the
\fIpam_unix\fR
module and it should not be called directly from applications\&.
.SH "SEE ALSO"
.PP

\fBpam_unix\fR(8)
.SH "AUTHOR"
.PP
Written by Andrew Morgan and other various people\&.