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+.\"-
+.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc.
+.\" All rights reserved.
+.\"
+.\" This software was developed for the FreeBSD Project by ThinkSec AS and
+.\" Network Associates Laboratories, the Security Research Division of
+.\" Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
+.\" ("CBOSS"), as part of the DARPA CHATS research program.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. The name of the author may not be used to endorse or promote
+.\"    products derived from this software without specific prior written
+.\"    permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $P4$
+.\"
+.Dd June 1, 2003
+.Dt OPENPAM_READLINE 3
+.Os
+.Sh NAME
+.Nm openpam_readline
+.Nd read a line from a file
+.Sh LIBRARY
+.Lb libpam
+.Sh SYNOPSIS
+.In sys/types.h
+.In security/pam_appl.h
+.In security/openpam.h
+.Ft char *
+.Fn openpam_readline "FILE *f" "int *lineno" "size_t *lenp"
+.Sh DESCRIPTION
+The
+.Nm
+function reads a line from a file, and returns it
+in a NUL-terminated buffer allocated with
+.Xr malloc 3 .
+.Pp
+The
+.Nm
+function performs a certain amount of processing
+on the data it reads.
+Comments (introduced by a hash sign) are stripped, as is leading and
+trailing whitespace.
+Any amount of linear whitespace is collapsed to a single space.
+Blank lines are ignored.
+If a line ends in a backslash, the backslash is stripped and the next
+line is appended.
+.Pp
+If
+.Va lineno
+is not
+.Dv NULL ,
+the integer variable it points to is
+incremented every time a newline character is read.
+.Pp
+If
+.Va lenp
+is not
+.Dv NULL ,
+the length of the line (not including the
+terminating NUL character) is stored in the variable it points to.
+.Pp
+The caller is responsible for releasing the returned buffer by passing
+it to
+.Xr free 3 .
+.Sh RETURN VALUES
+The
+.Nm
+function returns
+.Dv NULL
+on failure.
+.Sh SEE ALSO
+.Xr free 3 ,
+.Xr malloc 3 ,
+.Xr pam 3
+.Sh STANDARDS
+The
+.Nm
+function is an OpenPAM extension.
+.Sh AUTHORS
+The
+.Nm
+function and this manual page were developed for the FreeBSD Project
+by ThinkSec AS and Network Associates Laboratories, the Security
+Research Division of Network Associates, Inc.  under DARPA/SPAWAR
+contract N66001-01-C-8035
+.Pq Dq CBOSS ,
+as part of the DARPA CHATS research program.