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+'\" t
+.\"     Title: pam_prompt
+.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\"      Date: 05/18/2017
+.\"    Manual: Linux-PAM Manual
+.\"    Source: Linux-PAM Manual
+.\"  Language: English
+.\"
+.TH "PAM_PROMPT" "3" "05/18/2017" "Linux-PAM Manual" "Linux-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+pam_prompt, pam_vprompt \- interface to conversation function
+.SH "SYNOPSIS"
+.sp
+.ft B
+.nf
+#include <security/pam_ext\&.h>
+.fi
+.ft
+.HP \w'int\ pam_prompt('u
+.BI "int pam_prompt(pam_handle_t\ *" "pamh" ", int\ " "style" ", char\ **" "response" ", const\ char\ *" "fmt" ", " "\&.\&.\&." ");"
+.HP \w'int\ pam_vprompt('u
+.BI "int pam_vprompt(pam_handle_t\ *" "pamh" ", int\ " "style" ", char\ **" "response" ", const\ char\ *" "fmt" ", va_list\ " "args" ");"
+.SH "DESCRIPTION"
+.PP
+The
+\fBpam_prompt\fR
+function constructs a message from the specified format string and arguments and passes it to the conversation function as set by the service\&. Upon successful return,
+\fIresponse\fR
+is set to point to a string returned from the conversation function\&. This string is allocated on heap and should be freed\&.
+.SH "RETURN VALUES"
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory buffer error\&.
+.RE
+.PP
+PAM_CONV_ERR
+.RS 4
+Conversation failure\&.
+.RE
+.PP
+PAM_SUCCESS
+.RS 4
+Conversation succeded, response is set\&.
+.RE
+.PP
+PAM_SYSTEM_ERR
+.RS 4
+System error\&.
+.RE
+.SH "SEE ALSO"
+.PP
+\fBpam\fR(8),
+\fBpam_conv\fR(3)
+.SH "STANDARDS"
+.PP
+The
+\fBpam_prompt\fR
+and
+\fBpam_vprompt\fR
+functions are Linux\-PAM extensions\&.