1.\"- 2.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc. 3.\" Copyright (c) 2004-2011 Dag-Erling Smørgrav 4.\" All rights reserved. 5.\" 6.\" This software was developed for the FreeBSD Project by ThinkSec AS and 7.\" Network Associates Laboratories, the Security Research Division of 8.\" Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 9.\" ("CBOSS"), as part of the DARPA CHATS research program. 10.\" 11.\" Redistribution and use in source and binary forms, with or without 12.\" modification, are permitted provided that the following conditions 13.\" are met: 14.\" 1. Redistributions of source code must retain the above copyright 15.\" notice, this list of conditions and the following disclaimer. 16.\" 2. Redistributions in binary form must reproduce the above copyright 17.\" notice, this list of conditions and the following disclaimer in the 18.\" documentation and/or other materials provided with the distribution. 19.\" 3. The name of the author may not be used to endorse or promote 20.\" products derived from this software without specific prior written 21.\" permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" $Id$ 36.\" 37.Dd December 18, 2011 38.Dt OPENPAM_READLINE 3 39.Os 40.Sh NAME 41.Nm openpam_readline 42.Nd read a line from a file 43.Sh LIBRARY 44.Lb libpam 45.Sh SYNOPSIS 46.In sys/types.h 47.In security/pam_appl.h 48.In security/openpam.h 49.Ft "char *" 50.Fn openpam_readline "FILE *f" "int *lineno" "size_t *lenp" 51.Sh DESCRIPTION 52The 53.Nm 54function reads a line from a file, and returns it 55in a NUL-terminated buffer allocated with 56.Xr malloc 3 . 57.Pp 58The 59.Nm 60function performs a certain amount of processing 61on the data it reads: 62.Bl -bullet 63.It 64Comments (introduced by a hash sign) are stripped, as is leading and 65trailing whitespace. 66.It 67Any amount of linear whitespace is collapsed to a single space. 68.It 69Blank lines are ignored. 70.It 71If a line ends in a backslash, the backslash is stripped and the 72next line is appended. 73.El 74.Pp 75If 76.Fa lineno 77is not 78.Dv NULL , 79the integer variable it points to is 80incremented every time a newline character is read. 81.Pp 82If 83.Fa lenp 84is not 85.Dv NULL , 86the length of the line (not including the 87terminating NUL character) is stored in the variable it points to. 88.Pp 89The caller is responsible for releasing the returned buffer by passing 90it to 91.Xr free 3 . 92.Sh RETURN VALUES 93The 94.Nm 95function returns 96.Dv NULL 97on failure. 98.Sh SEE ALSO 99.Xr free 3 , 100.Xr malloc 3 , 101.Xr pam 3 102.Sh STANDARDS 103The 104.Nm 105function is an OpenPAM extension. 106.Sh AUTHORS 107The 108.Nm 109function and this manual page were developed for the 110.Fx 111Project by 112ThinkSec AS and Network Associates Laboratories, the 113Security Research Division of Network Associates, Inc.\& under 114DARPA/SPAWAR contract N66001-01-C-8035 115.Pq Dq CBOSS , 116as part of the DARPA CHATS research program. 117