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.\"
.IX Title "pam_fprintd 8"
.TH pam_fprintd 8 "2020-01-24" "freedesktop" ""
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
pam_fprintd \- PAM module to authenticate against fprintd, the fingerprint daemon
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBpam_fprintd.so\fR [debug|debug=[\fIon\fR|\fIoff\fR|\fItrue\fR|\fIfalse\fR|\fI1\fR|\fI0\fR]] [max\-tries=\fI\s-1MAX_TRIES\s0\fR] [timeout=\fI\s-1TIMEOUT\s0\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The pam_fprintd module is used to verify a user's fingerprints against fingerprints
enrolled using fprintd, the fingerprint management daemon.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fBdebug\fR" 8
.IX Item "debug"
.PD 0
.IP "\fBdebug=[\f(BIon\fB|\f(BIoff\fB|\f(BItrue\fB|\f(BIfalse\fB|\f(BI1\fB|\f(BI0\fB]\fR" 8
.IX Item "debug=[on|off|true|false|1|0]"
.PD
Whether debug should be turned on or off. Debug messages will be generated using
pam_syslog which means that they will be saved in the systemd journal by default.
.IP "\fBmax\-tries=\f(BI\s-1MAX_TRIES\s0\fB\fR" 8
.IX Item "max-tries=MAX_TRIES"
The number of attempts at fingerprint authentication to try before returning an
authentication failure. The minimum, and default, number of tries is 3.
.IP "\fBtimeout=\f(BI\s-1TIMEOUT\s0\fB\fR" 8
.IX Item "timeout=TIMEOUT"
The amount of time before returning an authentication failure. The default timeout
is 30 seconds, with 10 seconds being the minimum.
.SH "LIMITATIONS"
.IX Header "LIMITATIONS"
The \s-1PAM\s0 stack is by design a serialised authentication, so it is not
possible for pam_fprintd to allow authentication through passwords and
fingerprints at the same time.
.PP
It is up to the application using the \s-1PAM\s0 services to implement separate
\&\s-1PAM\s0 processes and run separate authentication stacks separately. This
is the way multiple authentication methods are made available to users
of gdm for example.
.SH "AUTHOR"
.IX Header "AUTHOR"
\&\fBfprintd\fR was written by Bastien Nocera.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.IP "\fBfprintd\fR, \fB\s-1PAM\s0\fR" 8
.IX Item "fprintd, PAM"