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- '\" t
- .\" Title: pwhistory_helper
- .\" Author: [see the "AUTHOR" section]
- .\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
- .\" Date: 09/03/2021
- .\" Manual: Linux-PAM Manual
- .\" Source: Linux-PAM Manual
- .\" Language: English
- .\"
- .TH "PWHISTORY_HELPER" "8" "09/03/2021" "Linux-PAM Manual" "Linux\-PAM Manual"
- .\" -----------------------------------------------------------------
- .\" * Define some portability stuff
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- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- .\" http://bugs.debian.org/507673
- .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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- .\" * set default formatting
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- .nh
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- .\" * MAIN CONTENT STARTS HERE *
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- .SH "NAME"
- pwhistory_helper \- Helper binary that transfers password hashes from passwd or shadow to opasswd
- .SH "SYNOPSIS"
- .HP \w'\fBpwhistory_helper\fR\ 'u
- \fBpwhistory_helper\fR [\&.\&.\&.]
- .SH "DESCRIPTION"
- .PP
- \fIpwhistory_helper\fR
- is a helper program for the
- \fIpam_pwhistory\fR
- module that transfers password hashes from passwd or shadow file to the opasswd file and checks a password supplied by user against the existing hashes in the opasswd file\&.
- .PP
- The purpose of the helper is to enable tighter confinement of login and password changing services\&. The helper is thus called only when SELinux is enabled on the system\&.
- .PP
- The interface of the helper \- command line options, and input/output data format are internal to the
- \fIpam_pwhistory\fR
- module and it should not be called directly from applications\&.
- .SH "SEE ALSO"
- .PP
- \fBpam_pwhistory\fR(8)
- .SH "AUTHOR"
- .PP
- Written by Tomas Mraz based on the code originally in
- \fIpam_pwhistory and pam_unix\fR
- modules\&.
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