Moved to standard repository layout

git-svn-id: file:///home/lennart/svn/public/ivcall/trunk@2 e0b13411-74c3-0310-b366-a0654dd0340f

15 files changed, 1830 insertions, 0 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d60c31a
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..4826b6a
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,35 @@
+# $Id$
+
+# This file is part of ivcall.
+#
+# ivcall is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# ivcall is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ivcall; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+EXTRA_DIST=bootstrap.sh README LICENSE
+SUBDIRS=src man doc
+
+MAINTAINERCLEANFILES = README
+noinst_DATA = README
+
+README:
+	rm -f README
+	$(MAKE) -C doc README
+	ln -s doc/README README
+
+homepage:
+	test -d $$HOME/homepage/lennart
+	mkdir -p $$HOME/homepage/lennart/projects/ivcall
+	cp *.tar.gz $$HOME/homepage/lennart/projects/ivcall
+	cp doc/README.html doc/style.css doc/NEWS $$HOME/homepage/lennart/projects/ivcall
+	cp $$HOME/homepage/lennart/projects/ivcall/README.html $$HOME/homepage/lennart/projects/ivcall/index.html
diff --git a/bootstrap.sh b/bootstrap.sh
new file mode 100755
index 0000000..73e6c40
--- /dev/null
+++ b/bootstrap.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+# $Id$
+
+# This file is part of ivcall.
+#
+# ivcall is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# ivcall is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ivcall; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+if [ "x$1" = "xam" ] ; then
+    set -ex
+    automake -a -c
+    ./config.status
+else 
+    set -ex
+
+    make maintainer-clean || true
+
+    rm -rf autom4te.cache
+    rm -f config.cache
+
+    aclocal
+    autoheader
+    automake -a -c
+    autoconf -Wall
+
+    ./configure "$@"
+fi
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..b6740bc
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,97 @@
+# -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+# $Id$
+
+# This file is part of ivcall.
+#
+# ivcall is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# ivcall is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ivcall; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+AC_PREREQ(2.57)
+AC_INIT([ivcall], [0.2], [mzvipnyy@itaparica.org])
+AC_CONFIG_SRCDIR([src/ivcall.c])
+AC_CONFIG_HEADERS([config.h])
+AM_INIT_AUTOMAKE([foreign -Wall])
+AM_MAINTAINER_MODE
+
+# Checks for programs.
+AC_PROG_CC
+
+# If using GCC specifiy some additional parameters
+if test "x$GCC" = "xyes" ; then
+   CFLAGS="$CFLAGS -pipe -Wall"
+fi
+
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+
+AC_CHECK_FUNCS([alarm memset select strdup strerror strrchr])
+AC_CHECK_HEADERS([fcntl.h limits.h stdlib.h string.h sys/ioctl.h sys/time.h termios.h unistd.h])
+
+AC_C_CONST
+AC_C_VOLATILE
+AC_FUNC_MALLOC
+AC_FUNC_MEMCMP
+AC_FUNC_REALLOC
+AC_FUNC_SELECT_ARGTYPES
+AC_HEADER_STDC
+AC_PROG_GCC_TRADITIONAL
+AC_TYPE_PID_T
+AC_TYPE_SIGNAL
+AC_TYPE_SIZE_T
+
+# LYNX documentation generation
+AC_ARG_ENABLE(lynx,
+        AC_HELP_STRING([--disable-lynx], [Turn off lynx usage for documentation generation]),
+[case "${enableval}" in
+  yes) lynx=yes ;;
+  no)  lynx=no ;;
+  *) AC_MSG_ERROR(bad value ${enableval} for --disable-lynx) ;;
+esac],[lynx=yes])
+
+if test x$lynx = xyes ; then
+   AC_CHECK_PROG(have_lynx, lynx, yes, no)
+
+   if test x$have_lynx = xno ; then
+     AC_MSG_ERROR([*** Sorry, you have to install lynx or use --disable-lynx ***])
+   fi
+fi
+
+AM_CONDITIONAL([USE_LYNX], [test "x$lynx" = xyes])
+
+# XMLTOMAN manpage generation
+AC_ARG_ENABLE(xmltoman,
+        AC_HELP_STRING([--disable-xmltoman], [Disable rebuilding of man pages with xmltoman]),
+[case "${enableval}" in
+  yes) xmltoman=yes ;;
+  no)  xmltoman=no ;;
+  *) AC_MSG_ERROR([bad value ${enableval} for --disable-xmltoman]) ;;
+esac],[xmltoman=yes])
+
+if test x$xmltoman = xyes ; then
+   AC_CHECK_PROG(have_xmltoman, xmltoman, yes, no)
+
+   if test x$have_xmltoman = xno ; then
+     AC_MSG_WARN([*** Not rebuilding man pages as xmltoman is not found ***])
+     xmltoman=no
+   fi
+fi
+
+AM_CONDITIONAL([USE_XMLTOMAN], [test "x$xmltoman" = xyes])
+
+AC_CONFIG_FILES([src/Makefile Makefile man/Makefile doc/Makefile doc/README.html])
+AC_OUTPUT
diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
index 0000000..a6b9bb7
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,35 @@
+# $Id$
+
+# This file is part of ivcall.
+#
+# ivcall is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# ivcall is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ivcall; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+noinst_DATA = README.html README
+EXTRA_DIST = $(noinst_DATA) style.css README.html.in
+
+MAINTAINERCLEANFILES = README README.html
+CLEANFILES =
+
+if USE_LYNX
+README: README.html
+	lynx --dump $^ | sed 's,file://localhost/.*/doc/README.html,README,' > $@
+
+CLEANFILES += README
+endif
+
+tidy: README.html
+	tidy -e < README.html
+
+.PHONY: tidy
diff --git a/doc/README.html.in b/doc/README.html.in
new file mode 100644
index 0000000..bf7a739
--- /dev/null
+++ b/doc/README.html.in
@@ -0,0 +1,131 @@
+<?xml version="1.0" encoding="iso-8895-15"?> <!-- -*-html-helper-*- -->
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+
+<head>
+<title>ivcall @PACKAGE_VERSION@</title>
+<link rel="stylesheet" type="text/css" href="style.css" />
+</head>
+
+<body>
+<h1><a name="top">ivcall @PACKAGE_VERSION@</a></h1>
+
+<p><i>Copyright 2002,2003 Lennart Poettering &lt;mzvscyhtq [at] itaparica.org&gt;</i></p>
+
+<ul class="toc">
+    <li><a href="#license">License</a></li>
+    <li><a href="#news">News</a></li>
+    <li><a href="#overview">Overview</a></li>
+    <li><a href="#status">Status</a></li>
+    <li><a href="#documentation">Documentation</a></li>
+    <li><a href="#requirements">Requirements</a></li>
+    <li><a href="#installation">Installation</a></li>
+    <li><a href="#acks">Acknowledgements</a></li>
+    <li><a href="#download">Download</a></li>
+</ul>
+
+<h2><a name="license">License</a></h2>
+
+<p>This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.</p>
+
+<p>This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.</p>
+
+<p>You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.</p>
+
+<h2><a name="news">News</a></h2>
+
+<div class="news-date">Sun July 27 2003: </div> <p class="news-text"><a
+href="http://www.stud.uni-hamburg.de/~lennart/projects/ivcall/ivcall-0.2.tar.gz">Version
+0.2</a> released, changes include: many fixes, autoconf support</p>
+
+<h2><a name="overview">Overview</a></h2>
+
+<p><tt>ivcall</tt> is a small utility which may be used to make automated
+telephone calls with your <i><a href="http://www.isdn4linux.de/">isdn4linux</a></i> supported ISDN
+card. Outgoing calls are
+supported as well as incoming calls. The audio data recieved
+from the peer is written to STDOUT, audio data read from STDIN
+is send to the peer. The audio data is in raw 8 bit uLaw 8 KHz format,
+without any headers.</p>
+
+ <h2><a name="status">Status</a></h2>
+
+<p>Version @PACKAGE_VERSION@ is stable and feature complete.</p>
+  
+<h2><a name="documentation">Documentation</a></h2>
+
+<p>You may use <tt>ivcall</tt> as a Unix filter:
+
+<pre>
+ivcall LMSN RMSN < IFILE > OFILE
+</pre>
+
+<p>Replace <tt>LMSN</tt> by the local MSN and <tt>RMSN</tt> by the MSN
+the program shall call. <tt>IFILE</tt> must be a raw uLAW 8 KHz
+bytesized file, which is be played to the peer. <tt>OFILE</tT> is the
+file the recorded audio data will be written to. It has the same
+format as the input file. If no recording (or playback) is desired you
+may pipe <tt>STDOUT</tt> (or <tt>STDIN</tt>) to <tt>/dev/null</tt>.
+
+<p>Four detailed usage information try:</p>
+
+<pre>
+ivcall --help
+</pre>
+
+<p>If you want to create a sample playable with <tt>ivcall</tt> with your
+soundcard, you'll need <tt>sox</tt>:</p>
+
+<pre>$ rec -t raw -r 8000 -U -b FILE</pre>
+
+<p>Don't forget to plug in a microphone and set the record volume with
+<tt>aumix</tt> or something similar. However, it is recommended to create
+audio samples with the telephone itself.</p>
+
+<p>If you have a wave file you want to convert to a sample playable
+with <tt>ivcall</tt> use <tt>sox</tt> as well:</p>
+
+<pre>$ sox IFILE -t raw -r 8000 -U -b OFILE</pre>
+
+<h2><a name="requirements">Requirements</a></h2>
+
+<p>A newer Linux Kernel (I think 2.0 is good enough, alltough I tested it
+only with 2.4) with a compatible device driver (<tt>isdn4linux</tt>).
+
+<p><tt>ivcall</tt> was developed and tested on Debian GNU/Linux
+"testing" from July 2003, it should work on most other Linux
+distributions since it uses GNU autoconf for source code configuration.</p>
+
+<h2><a name="installation">Installation</a></h2>
+
+<p>As this package is made with the GNU autotools you should run
+<tt>./configure</tt> inside the distribution directory for configuring
+the source tree. After that you should run <tt>make</tt> for
+compilation and <tt>make install</tt> (as root) for installation of
+<tt>ivcall</tt>.</p>
+
+<h2><a name="acks">Acknowledgements</a></h2>
+
+<p>For the developers of <tt>awag</tt> (Stefan Szomraky), <tt>minicom</tt> (Miquel van Smoorenburg) and <tt>vbox</tt> (Michael Herold), since I looked
+on their source codes for learning how to use the <tt>isdn4linux</tt> modem emulation</p>
+
+<h2><a name="download">Download</a></h2>
+
+<p>The newest release is always available from <a href="http://www.stud.uni-hamburg.de/~lennart/projects/ivcall/">http://www.stud.uni-hamburg.de/~lennart/projects/ivcall/</a></p>
+
+<p>The current release is <a href="http://www.stud.uni-hamburg.de/~lennart/projects/ivcall/ivcall-@PACKAGE_VERSION@.tar.gz">@PACKAGE_VERSION@</a></p>
+
+<hr/>
+<address>Lennart Poettering &lt;mzvscyhtq [at] itaparica.org&gt;, July 2003</address>
+<div><i>$Id$</i></div>
+
+</body>
+</html>
diff --git a/doc/style.css b/doc/style.css
new file mode 100644
index 0000000..0a40aef
--- /dev/null
+++ b/doc/style.css
@@ -0,0 +1,12 @@
+/* $Id$ */
+body { color: black; background-color: white; margin: 0.5cm; } 
+a:link, a:visited { color: #900000; }       
+p { margin-left: 0.5cm; margin-right: 0.5cm; }
+div.news-date { margin-left: 0.5cm; font-size: 80%; color: #4f0000; } 
+p.news-text { margin-left: 1cm; }
+ul { margin-left: .5cm; }
+ol { margin-left: .5cm; }
+h1 { color: #00009F; }
+h2 { color: #00009F; }
+h3 { color: #00004F; margin-left: 0.5cm; }
+pre { margin-left: .5cm; background-color: #f0f0f0; padding: 0.4cm;}
diff --git a/man/Makefile.am b/man/Makefile.am
new file mode 100644
index 0000000..10da8b5
--- /dev/null
+++ b/man/Makefile.am
@@ -0,0 +1,30 @@
+# $Id$
+
+# This file is part of ivcall.
+#
+# ivcall is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# ivcall is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ivcall; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+man_MANS = ivcall.1
+
+EXTRA_DIST = $(man_MANS) ivcall.1.xml.in
+
+if USE_XMLTOMAN
+
+CLEANFILES = $(man_MANS)
+
+ivcall.1: ivcall.1.xml.in Makefile
+	sed -e 's,@sysconfdir\@,$(sysconfdir),g' -e 's,@sbindir\@,$(sbindir),g' -e 's,@PACKAGE_BUGREPORT\@,$(PACKAGE_BUGREPORT),g' $< | xmltoman - > $@
+
+endif
diff --git a/man/ivcall.1.xml.in b/man/ivcall.1.xml.in
new file mode 100644
index 0000000..c861f27
--- /dev/null
+++ b/man/ivcall.1.xml.in
@@ -0,0 +1,111 @@
+<?xml version="1.0" standalone='no'?>
+<!DOCTYPE spec SYSTEM "man.dtd">
+
+<!-- $Id$ -->
+
+<!-- 
+  This file is part of ivcall.
+
+  ivcall is free software; you can redistribute it and/or modify it under
+  the terms of the GNU General Public License as published by the Free
+  Software Foundation; either version 2 of the License, or (at your
+  option) any later version.
+
+  ivcall is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+  for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with ivcall; if not, write to the Free Software Foundation,
+  Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 
+-->
+
+  <manpage name="ivcall" section="1" desc="A Linux tool for doing automated ISDN voice calls">
+
+	<synopsis>
+      	<cmd>ivcall [<arg>options</arg>] &lt;<arg>source-msn</arg>&gt; &lt;<arg>destination-msn</arg>&gt;</cmd>
+      	<cmd>ivcall <arg>-a</arg> &lt;<arg>options</arg>&gt; &lt;<arg>msn</arg>&gt;</cmd>
+	</synopsis>
+	
+	<description>
+	  <p>ivcall is a small utility which may be used to make automated
+	  telephone calls with your isdn4linux supported ISDN card. Outgoing calls are
+	  supported as well as incoming calls. The audio data recieved
+	  from the peer is written to STDOUT, audio data read from STDIN
+	  is send to the peer. The audio data is in raw 8 bit uLaw 8 KHz format,
+	  without any headers.</p>
+	</description>
+	
+	<options>
+	  
+	  <option>
+		<p><opt>-t | --timeout=</opt> <arg>TIMEOUT</arg></p>
+		<optdesc><p>
+            Specify a timeout for waiting for a successfull connection.
+		  </p></optdesc>
+	  </option>
+	  
+	  <option>
+		<p><opt>-d | --device=</opt> <arg>DEVICE</arg></p>
+		<optdesc><p>
+			Selects a modem emulation device (e.g. /dev/ttyI7). If none given the first available will be used.
+		  </p></optdesc>
+	  </option>
+	  
+	  <option>
+		<p><opt>-v | --verbose</opt></p>
+		<optdesc><p>
+			Enable debug mode. Ivcall will output the conversation with the modem emulation to STDERR .
+		  </p></optdesc>
+	  </option>
+	  
+	  <option>
+		<p><opt>-a | --answer</opt></p>
+		<optdesc><p>
+			Instead of doing an outgoing call wait for an incoming
+		  </p></optdesc>
+	  </option>
+	  
+	  <option>
+		<p><opt>-r | --rings=</opt> <arg>RINGS</arg></p>
+		<optdesc><p>
+			Specify how many RINGs ivcall should wait before accepting an incoming call
+		  </p></optdesc>
+	  </option>
+
+	  <option>
+		<p><opt>-h | --help</opt></p>
+		<optdesc><p>
+			Show help
+		  </p></optdesc>
+	  </option>
+	  
+	  <option>
+		<p><opt>-V | --version</opt></p>
+		<optdesc><p>
+			Show version
+		  </p></optdesc>
+	  </option>
+
+
+	</options>
+	
+    <section name="Signals">
+      <p><arg>SIGINT</arg> ivcall will quit and terminate the connection.</p>
+    </section>
+
+	<section name="Author">
+	  <p>ivcall was written by Lennart Poettering
+		&lt;@PACKAGE_BUGREPORT@&gt;. ivcall is available
+		at <url
+		href="http://www.stud.uni-hamburg.de/users/lennart/projects/ivcall/"/>
+	  </p>
+	</section>
+	
+	<section name="Comments">
+	  <p>This man page was written using <manref name="xmltoman" section="1"
+		  href="http://masqmail.cx/xml2man/"/> by Oliver Kurth.</p>
+	</section>
+	
+  </manpage>
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..1fa04d5
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,21 @@
+# $Id$
+
+# This file is part of ifplugd.
+#
+# ifplugd is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# ifplugd is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with ifplugd; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+bin_PROGRAMS = ivcall
+ivcall_SOURCES = ivcall.c lock.c lock.h util.c util.h
+
diff --git a/src/ivcall.c b/src/ivcall.c
new file mode 100644
index 0000000..54c840d
--- /dev/null
+++ b/src/ivcall.c
@@ -0,0 +1,729 @@
+/* $Id$ */
+
+/*
+ * This file is part of ivcall.
+ *
+ * ivcall is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * ivcall is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ivcall; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <termios.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <limits.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <getopt.h>
+#include <string.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/select.h>
+
+#include "util.h"
+#include "lock.h"
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+// Where do lockfiles reside?
+#ifndef LOCK_PATH
+#define LOCK_PATH "/var/lock"
+#endif
+
+// Those nifty DLE-sequences
+#define DLE 0x10
+#define ETX 0x03
+#define DC4 0x14
+
+// Baudrate for the TTY. Should be greater the 64000.
+#define BAUD_RATE B115200
+
+// Every single commands gets a timeout of 2 seconds.
+#define COMMAND_TIMEOUT 2
+
+// The default timeout for waiting that the call gets accepted.
+#define DEFAULT_TIMEOUT 30
+
+// Initialisation of the modem
+const char *at_commands[] = {
+    "AT&F\n",         "OK\r\n",
+    "ATI\n",          "Linux ISDN\r\nOK",
+    "AT&B128\n",      "OK\r\n",
+    "AT+FCLASS=8\n",  "OK\r\n",
+    "AT+VSM=6\n",     "OK\r\n",
+    "ATS18=1\n",      "OK\r\n",
+    "ATS14=4\n",      "OK\r\n",
+    "ATS13.4=1\n",    "OK\r\n",
+    "ATS23=1\n",      "OK\r\n",
+    0
+};
+
+// Local MSN
+char *source_msn = NULL;
+
+// Remote MSN
+char *destination_msn = NULL;
+
+// Modem-device
+char *device = NULL;
+
+// Our name
+char *appname = NULL;
+
+// The default timeout
+int timeout = DEFAULT_TIMEOUT;
+
+// Enable debug-mode or not?
+int debug = 0;
+
+// We got a ctrl-c
+volatile int interrupted = 0;
+
+// Got an SIGARLM?
+volatile int alarmed = 0;
+
+// Shall we wait for a call?
+int answer = 0;
+
+// After how many RINGs we shall answer?
+int rings = 1;
+
+// Saved TTY configuration
+struct termios saved_termios;
+
+// Our ctrl-c handler
+void sigint(int sig) {
+    const char *s = "Got SIGINT\n";
+    write(2, s, strlen(s));
+    interrupted = 1;
+}
+
+void sigalrm(int sig) {
+    const char *s = "Timeout\n";
+    write(2, s, strlen(s));
+    alarmed = 1;
+}
+
+// Waits for a certain string from the modem up to a certain time.
+int tty_waitfor(int fd, const char *what, int t) {
+    static char buf[256];
+    char *p = buf;
+    int r = -1, l;
+
+    if (debug)
+        fprintf(stderr, "<- ");
+
+    l = strlen(what);
+    
+    if (t == -1)
+        t = 0;
+    alarm(0);
+    alarmed = 0;
+    alarm(t);
+
+    while (!interrupted && !alarmed) {
+        ssize_t s;
+
+        if ((s = read(fd, p, 1)) <= 0)
+            break;
+
+        if (debug)
+            fprintf(stderr, "%c", *p);
+        
+        p++;
+        
+        if (p - buf >= l && !strncmp(p-l, what, l)) {
+            r = 0;
+            break;
+        }
+    }
+    
+
+    alarm(0);
+    alarmed = 0;
+    
+    if (debug)
+        fprintf(stderr, "\n");
+  
+    return r;
+}
+
+// Write a string to the modem
+int tty_puts(int fd, const char *s) {
+    int l = strlen(s);
+
+    if (loop_write(fd, s, l) != l)
+        return -1;
+
+    if (tcdrain(fd) < 0)
+        return -1;
+    
+    if (debug) 
+        fprintf(stderr, "-> %s", s);
+
+    return 0;
+}
+
+// Issue a command to the modem an wait for an answer
+int tty_command(int fd, const char *cmd, const char* resp, int t) {
+    tcflush(fd, TCIFLUSH);
+    tty_puts(fd, cmd);
+    return tty_waitfor(fd, resp, t);
+}
+
+// Hang up the modem
+int hard_hangup(int fd) {
+    struct termios pts;
+
+    tcflush(fd, TCIOFLUSH);
+
+    if (tcgetattr(fd, &pts) < 0)
+        return -1;
+    
+    cfsetospeed(&pts, B0);
+    cfsetispeed(&pts, B0);
+    tcsetattr(fd, TCSANOW, &pts);
+
+    sleep(1);
+
+    if (tcgetattr(fd, &pts) < 0)
+        return -1;
+    cfsetospeed(&pts, BAUD_RATE);
+    cfsetispeed(&pts, BAUD_RATE);
+    tcsetattr(fd, TCSANOW, &pts);
+
+    sleep(1);
+    
+    tcflush(fd, TCIFLUSH);
+
+    return 0;
+}
+
+// Opens the modem and sets the baud rate
+int tty_open(const char *device) {
+    struct termios pts, pts2;
+    int fd = -1, n;
+   
+    if ((fd = open(device, O_RDWR|O_NDELAY)) < 0)
+        goto fail;
+
+    if ((n = fcntl(fd, F_GETFL, 0)) < 0)
+        goto fail;
+        
+    if (fcntl(fd, F_SETFL, n & ~O_NDELAY) < 0)
+        goto fail;
+        
+    if (tcgetattr(fd, &saved_termios) < 0)
+        goto fail;
+
+    memset(&pts, 0, sizeof(pts));
+    pts.c_cflag = CRTSCTS | IGNPAR | HUPCL | CS8;
+    pts.c_iflag = IGNPAR;
+    pts.c_oflag = 0;
+    pts.c_lflag = 0;
+    
+    pts.c_cc[VMIN] = 1;
+    pts.c_cc[VTIME] = 0;
+
+    cfsetospeed(&pts, BAUD_RATE);
+    cfsetispeed(&pts, BAUD_RATE);
+
+    tcflush(fd, TCIOFLUSH);
+    if (!tcsetattr(fd, TCSANOW, &pts))
+        if (!tcgetattr(fd, &pts2))
+            if (!memcmp(&pts, &pts, sizeof(struct termios)))
+                return fd;
+
+    tcsetattr(fd, TCSANOW, &saved_termios);
+
+fail:
+
+    if (fd >= 0)
+        close(fd);
+    
+    return -1;
+}
+
+// Closes the modem device and resets the baudrate
+void tty_close(int fd) {
+    tcflush(fd, TCIOFLUSH);
+    tcsetattr(fd, TCSANOW, &saved_termios);
+    close(fd);
+}
+
+// Detects the DCD line
+int detect_carrier(int fd) {
+    unsigned int arg;
+
+    if (ioctl(fd, TIOCMGET, &arg) < 0)
+        return -1;
+
+    return arg & TIOCM_CAR ? 1 : 0;
+}
+
+// Filters out DLE-sequences from modem
+char *filter_dle(unsigned char *data, int *size, int *flag, int *quit) {
+    unsigned char *ret, *m, *s, *d;
+    int l;
+    
+    if (!(ret = malloc(*size)))
+        return NULL;
+
+    for (l = *size, s = data, d = ret; l > 0; l--, s++) {
+        if (*flag) {
+            switch (*s) {
+                case DLE :
+                    *(d++) = DLE;		  
+                    break;
+		
+                case ETX :
+                case DC4 :
+                    *quit = 1;
+                    break;
+                    
+                default :
+                    // We recieved some DTMF signals, but we ignore them.
+                    break;
+	    }
+
+            *flag = 0;
+            continue;
+	}
+
+        if (*s == DLE)
+            *flag = 1;
+        else
+            *(d++) = *s;
+        
+    }
+
+    *size = d-ret;
+
+    if (!(m = realloc(ret, *size))) {
+        free(ret);
+        return NULL;
+    }
+    
+    return m;
+}
+
+// Escape DLE-bytes for sending data to the modem
+char* escape_dle(unsigned char *data, int *size) {
+    unsigned char *ret, *m, *s, *d;
+    int l, ms;
+    
+    if (!(ret = malloc(ms = (int) (*size*1.05))))
+        return NULL;
+    
+    for (l = *size, s = data, d = ret; l > 0; l--, s++) {
+        
+        if (*s == DLE) {
+            *(d++) = DLE;
+            (*size)++;
+            
+            if (ms < *size) {
+                int n = d-ret;
+
+                fprintf(stderr, "REALLOC!\n");
+                
+                if (!(m = realloc(ret, ms = (int) (*size*1.05)))) {
+                    free(ret);
+                    return NULL;
+                }
+                ret = m;
+                d = ret+n;
+            }
+        }
+        
+        *(d++) = *s;
+    }
+    
+    if (!(m = realloc(ret, *size))) {
+        free(ret);
+        return NULL;
+    }
+    
+    return m;
+}
+
+
+// The function that does the modem work
+int go(void) {
+    int i, flag, warned = 0, r = -1, fd = -1, quit;
+    char *incoming = NULL, *outgoing = NULL;
+    int incoming_idx = 0, incoming_len = 0,
+        outgoing_idx = 0, outgoing_len = 0;
+    int fm;
+    char fn[PATH_MAX];
+    static char buf[1024];
+    
+    if ((device ? device_lock(device, appname) : device_lock_first(appname, fn, sizeof(fn))) < 0) {
+        fprintf(stderr, "Could not get lock on device: %s\n", strerror(errno));
+        goto fail;
+    }
+
+    if (!device)
+        if (!(device = strdup(fn))) {
+            fprintf(stderr, "Out of memory!\n");
+            goto fail;
+        }
+
+    if ((fd = tty_open(device)) < 0) {
+        fprintf(stderr, "Could not open device: %s\n", strerror(errno));
+        goto fail;
+    }
+    
+    for (i = 0; at_commands[i] != 0; i+=2)
+        if (tty_command(fd, at_commands[i], at_commands[i+1], COMMAND_TIMEOUT) < 0) {
+            fprintf(stderr, "Initialisation failure.\n");
+            goto fail;
+        }
+    
+    snprintf(buf, sizeof(buf), "AT&E%s\n", source_msn);
+    if (tty_command(fd, buf, "OK\r\n", COMMAND_TIMEOUT) < 0) {
+        fprintf(stderr, "Initialisation failure.\n");
+        goto fail;
+    }
+
+    if (answer)
+        snprintf(buf, sizeof(buf), "ATS0=%i\n", rings);
+    else
+        snprintf(buf, sizeof(buf), "ATD%s\n", destination_msn);
+
+    if (tty_command(fd, buf, "VCON\r\n", timeout) < 0) {
+        fprintf(stderr, "Failed to accept connection.\n");
+        r = -2;
+        goto fail;
+    }
+
+    if (tty_command(fd, "AT+VTX+VRX\n", "CONNECT\r\n\r\nCONNECT\r\n", COMMAND_TIMEOUT) < 0) {
+        fprintf(stderr, "Could not switch to full-duplex audio: %s\n", strerror(errno));
+        goto fail;
+    }
+
+    flag = quit= 0;
+
+    if (fd > 1)
+        fm = fd+1;
+    else
+        fm = 1+1;
+    
+    while (!interrupted && (!quit || outgoing || incoming)) { 
+        fd_set rfds, wfds;
+        int c, b;
+        
+        if ((c = detect_carrier(fd)) < 0) {
+            fprintf(stderr, "Failure reading DCD line: %s\n", strerror(errno));
+            goto fail;
+        } else if (!c) {
+            if (outgoing) {
+                free(outgoing);
+                outgoing = NULL;
+            }
+            quit = 1;
+            break;
+        }
+
+        b = 0;
+        FD_ZERO(&rfds);
+        if (!quit) {
+            if (!outgoing) {
+                FD_SET(0, &rfds);
+                b = 1;
+            }
+            if (!incoming) {
+                b = 1;
+                FD_SET(fd, &rfds);
+            }
+        }
+
+        FD_ZERO(&wfds);
+        if (outgoing) {
+            b=1;
+            FD_SET(fd, &wfds);
+        }
+        if (incoming) {
+            b = 1;
+            FD_SET(1, &wfds);
+        }
+
+        if (!b)
+            break;
+        
+        if ((r = select(fm, &rfds, &wfds, 0, 0)) < 0) {
+            if (errno == EINTR)
+                continue;
+
+            fprintf(stderr, "select(): %s\n", strerror(errno));
+            goto fail;
+        }
+            
+
+        if (!outgoing && FD_ISSET(0, &rfds)) {
+            if ((outgoing_len = read(0, buf, sizeof(buf))) < 0) {
+                fprintf(stderr, "read(): %s\n", strerror(errno));
+                goto fail;
+            }
+                
+            if (!outgoing_len)
+                quit = 1;
+            else {
+                outgoing = escape_dle(buf, &outgoing_len);
+                outgoing_idx = 0;
+            }
+        }
+
+        if (outgoing && FD_ISSET(fd, &wfds)) {
+            ssize_t l;
+            if ((l = write(fd, outgoing+outgoing_idx, outgoing_len-outgoing_idx)) < 0) {
+                fprintf(stderr, "write(): %s\n", strerror(errno));
+                goto fail;
+            }
+
+            if (!l)
+                quit = 1;
+            else {
+                outgoing_idx += l;
+                
+                if (outgoing_idx >= outgoing_len) {
+                    free(outgoing);
+                    outgoing = NULL;
+                    outgoing_len = outgoing_idx = 0;
+                }
+            }
+        }
+
+        
+        if (!incoming && FD_ISSET(fd, &rfds)) {
+            if ((incoming_len = read(fd, buf, sizeof(buf))) < 0) {
+                fprintf(stderr, "read(): %s\n", strerror(errno));
+                goto fail;
+            }
+
+            if (!incoming_len)
+                quit = 1;
+            else {
+                incoming = filter_dle(buf, &incoming_len, &flag, &quit);
+                incoming_idx = 0;
+            }
+        }
+
+        if (incoming && FD_ISSET(1, &wfds)) {
+            ssize_t l;
+            if (isatty(1)) {
+                if (!warned) {
+                    fprintf(stderr, "I won't print out binary data to a tty. Pipe stdout to somewhere else.\n");
+                    warned = 1;
+                }
+
+                free(incoming);
+                incoming = NULL;
+                incoming_len = incoming_idx = 0;
+                
+            } else {
+                if ((l = write(1, incoming+incoming_idx, incoming_len-incoming_idx)) < 0) {
+                    fprintf(stderr, "write(1): %s\n", strerror(errno));
+                    goto fail;
+                }
+
+                if (!l)
+                    quit = 1;
+                else {
+                    incoming_idx += l;
+                    
+                    if (incoming_idx >= incoming_len) {
+                        free(incoming);
+                        incoming = NULL;
+                        incoming_len = incoming_idx = 0;
+                    }
+                }
+            }
+        }
+    }
+            
+			  
+    buf[0] = DLE;
+    buf[1] = DC4;
+    buf[2] = DLE;
+    buf[3] = ETX;
+    loop_write(fd, buf, 4);
+    tcdrain(fd);
+    tty_puts(fd, "ATH\n");
+
+    r = 0;
+    
+fail:
+    
+    if (incoming)
+        free(incoming);
+
+    if (outgoing)
+        free(outgoing);
+    
+    if (fd >= 0) {
+        hard_hangup(fd);
+        tty_puts(fd, "AT&F\n");
+        tty_close(fd);
+        device_unlock();
+    }
+  
+    return r;
+}
+
+struct option long_options[] = {
+    {"help", 0, 0, 'h'},
+    {"timeout", 1, 0, 't'},
+    {"device", 1, 0, 'd'},
+    {"verbose", 0, 0, 'v'},
+    {"answer", 0, 0, 'a'},
+    {"ring", 1, 0, 'r'},
+    {"version", 0, 0, 'V'},
+    {0, 0, 0, 0}
+};
+
+// Most important part of the program
+void usage() {
+    printf("Usage: %s [options] <source-msn> <destination-msn>\n"
+           "       %s -a [options] <msn>\n"
+           "\n"
+           "Options:\n"
+           " -h, --help            Shows this usage information\n"
+           " -t, --timeout=TIMEOUT Sets a timeout (%i)\n"
+           " -d, --device=DEVICE   Selects a device (if not specified, the first available /dev/ttyInn is used)\n"
+           " -v, --verbose         Enables debug mode (%s)\n"
+           " -a, --answer          Wait for incoming call instead of calling out (%s)\n"
+           " -r, --ring=RINGS      On incoming call answer after given RINGs (%i)\n"
+           " -V, --version         Show %s version number\n",
+           appname, appname,
+           timeout,
+           debug ? "on" : "off",
+           answer ? "on" : "off",
+           rings,
+           appname);
+}
+
+// Parses command line and executes go()
+int main (int argc, char *argv[]) {
+    int c, r = 1;
+
+    appname = basename(argv[0]);
+    
+    while((c = getopt_long(argc, argv, "ht:d:var:V", long_options, NULL)) >= 0) {
+
+        switch (c) {
+            case 'V' :
+                printf("%s "VERSION"\n", appname);
+                r = 0;
+                goto finish;
+                
+            case 'h' :
+                usage();
+                r = 0;
+                goto finish;
+	  
+            case 't' :
+                if (optarg) {
+                    if ((timeout = atoi(optarg)) < 1) {
+                        fprintf(stderr, "Timeout must be >= 1.\n");
+                        goto finish;
+                    }
+                } else {
+                    fprintf(stderr, "Expected argument on timeout option.\n");
+                    goto finish;
+                }
+                break;
+
+            case 'd' :
+                if (optarg) {
+                    if (device) 
+                        free(device);
+                    else
+                        device = strdup(optarg);
+                } else {
+                    fprintf(stderr, "Expected argument on device option.\n");
+                    goto finish;
+                }
+                break;
+
+            case 'v' :
+                debug = !debug;
+                break;
+	  
+            case 'a' :
+                answer = !answer;
+                break;
+	  
+            case 'r' :
+                if (optarg) {
+                    
+                    if ((rings = atoi(optarg)) < 1) {
+                        fprintf(stderr, "RINGs must be >= 1.\n");
+                        goto finish;
+                    }
+                } else {
+                    fprintf(stderr, "Expected argument on rings option.\n");
+                    goto finish;
+                }
+                break;
+
+            case '?' :
+                goto finish;
+	}
+    }
+    
+    if (answer) {
+        if (optind != argc-1) {
+            fprintf(stderr, "You did not specify the listening MSN.\n");
+            usage();
+            goto finish;
+        }
+        
+        source_msn = strdup(argv[optind]);
+    } else {
+        if (optind != argc-2) {
+            fprintf(stderr, "You did not specify both destination and source MSNs.\n");
+            usage();
+            goto finish;
+        }
+
+        source_msn = strdup(argv[optind]);
+        destination_msn = strdup(argv[optind+1]);
+    }
+    
+    if (!timeout)
+        timeout = answer ? -1 : DEFAULT_TIMEOUT;
+
+    signal(SIGINT, &sigint);
+    signal(SIGALRM, &sigalrm);
+    signal(SIGPIPE, SIG_IGN);
+    siginterrupt(SIGINT, 1);
+    siginterrupt(SIGALRM, 1);
+
+    r = go() < 0 ? 1 : 0;
+
+finish:
+    
+    if (source_msn) free (source_msn);
+    if (destination_msn) free(destination_msn);
+    if (device) free(device);
+    
+    return r;
+}
+
diff --git a/src/lock.c b/src/lock.c
new file mode 100644
index 0000000..465736c
--- /dev/null
+++ b/src/lock.c
@@ -0,0 +1,130 @@
+/* $Id$ */
+
+/*
+ * This file is part of ivcall.
+ *
+ * ivcall is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * ivcall is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ivcall; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <unistd.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <pwd.h>
+
+#include "lock.h"
+#include "util.h"
+
+// Where do lockfiles reside?
+#define LOCK_PATH "/var/lock"
+
+static char* lockfile = NULL;
+
+// Tries to lock a TTY-device, returns 0 on success
+int device_lock(char *dev, char *appname) {
+    char buf[256], u[16];
+    char path[PATH_MAX];
+    int fd;
+    struct passwd *pwd;
+    char *username;
+
+    assert(dev && !lockfile);
+    
+    if (access(LOCK_PATH, W_OK) < 0)
+        return -1;
+        
+    snprintf(path, sizeof(path), "%s/LCK..%s", LOCK_PATH, basename(dev));
+      
+    if ((fd = open(path, O_RDONLY)) >= 0) {
+        int n = loop_read(fd, buf, sizeof(buf) - 1);
+        close(fd);
+
+        if (n > 0) {
+            int pid;
+            
+            if (n == 4)
+                pid = *(int*) buf;
+            else {
+                buf[n] = 0;
+                sscanf(buf, "%d", &pid);
+            }
+	      
+            if (pid > 0) {
+                if (kill((pid_t) pid, 0) < 0 && errno == ESRCH) {
+                    fprintf(stderr, "Lockfile is stale. Overriding it.\n");
+                    unlink(path);
+                } else
+                    return -1;
+            }
+        }
+    }
+
+    if ((fd = open(path, O_WRONLY | O_CREAT | O_EXCL, 0666)) < 0)
+        return -1;
+      
+    if ((pwd = getpwuid(getuid())))
+        username = pwd->pw_name;
+    else
+        snprintf(username = u, sizeof(u), "%u", getuid());
+
+    snprintf(buf, sizeof(buf), "%10ld %s %.20s\n", (long)getpid(), appname, username);
+    
+    if (loop_write(fd, buf, strlen(buf)) < 0) {
+        close(fd);
+        return -1;
+    }
+    
+    close(fd);
+
+    lockfile = strdup(path);
+    
+    return 0;
+}
+
+// Tries to lock the first free device, returns 0 on success
+int device_lock_first(char *appname, char *dev, size_t l) {
+    int i, found = 0;
+
+    for (i = 2; i <= 20; i++) {
+        snprintf(dev, l, "/dev/ttyI%i", i);
+        
+        if (!device_lock(dev, appname)) {
+            found = 1;
+            break;
+        }
+    }
+    
+    if (found)
+        return 0;
+    else {
+        fprintf(stderr, "Could not find free device.\n");
+        return -1;
+    }
+}
+
+// Deletes the lockfile
+void device_unlock(void) {
+    if (lockfile) {
+        unlink(lockfile);
+        free (lockfile);
+        lockfile = NULL;
+    }
+}
diff --git a/src/lock.h b/src/lock.h
new file mode 100644
index 0000000..a1847c9
--- /dev/null
+++ b/src/lock.h
@@ -0,0 +1,28 @@
+#ifndef foolockhfoo
+#define foolockhfoo
+
+/* $Id$ */
+
+/*
+ * This file is part of ivcall.
+ *
+ * ivcall is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * ivcall is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ivcall; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+int device_lock(char *dev, char*appname);
+int device_lock_first(char*appname, char *dev, size_t l);
+void device_unlock(void);
+
+#endif
diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..153a5c4
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,65 @@
+/* $Id$ */
+
+/*
+ * This file is part of ivcall.
+ *
+ * ivcall is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * ivcall is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ivcall; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <unistd.h>
+#include <termios.h>
+#include <string.h>
+
+#include "util.h"
+
+ssize_t loop_read (int FILEDES, const void *BUFFER, size_t SIZE) {
+    int c = 0;
+    
+    while (SIZE > 0) {
+        int r;
+
+        if ((r = read(FILEDES, (void*) BUFFER, SIZE)) <= 0)
+            break;
+
+        SIZE -= r;
+        c += r;
+        BUFFER = ((void*) (((char*) BUFFER) + r));
+    }
+
+    return c;
+}
+
+ssize_t loop_write(int FILEDES, const void *BUFFER, size_t SIZE) {
+    int c = 0;
+    
+    while (SIZE > 0) {
+        int r;
+
+        if ((r = write(FILEDES, BUFFER, SIZE)) <= 0)
+            break;
+
+        SIZE -= r;
+        c += r;
+        BUFFER = ((void*) (((char*) BUFFER) + r));
+    }
+
+    return c;
+}
+
+// Returns a pointer to the filename in a path
+char *basename(char *f) {
+  char *i = strrchr(f, '/');
+  return i ? i+1 : f;
+}
diff --git a/src/util.h b/src/util.h
new file mode 100644
index 0000000..1192ad4
--- /dev/null
+++ b/src/util.h
@@ -0,0 +1,28 @@
+#ifndef fooutilhfoo
+#define fooutilhfoo
+
+/* $Id$ */
+
+/*
+ * This file is part of ivcall.
+ *
+ * ivcall is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * ivcall is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ivcall; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+char *basename(char *f);
+ssize_t loop_write(int FILEDES, const void *BUFFER, size_t SIZE);
+ssize_t loop_read (int FILEDES, const void *BUFFER, size_t SIZE);
+
+#endif