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path: root/support/dktools/dk-send.ctr
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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
license		=	bsd



%%	module

#include "dk4conf.h"

#if DK4_HAVE_MATH_H
#ifndef MATH_H_INCLUDED
#include <math.h>
#define	MATH_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_IO_H
#ifndef IO_H_INCLUDED
#include <io.h>
#define	IO_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_FCNTL_H
#ifndef FCNTL_H_INCLUDED
#include <fcntl.h>
#define FCNTL_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_STRING_H
#ifndef	STRING_H_INCLUDED
#include <string.h>
#define	STRING_H_INCLUDED 1
#endif
#endif

#include "dk4app.h"
#include "dk4aopt.h"
#include "dk4socka.h"
#include "dk4maidddu.h"
#include "dk4mpl.h"
#include "dk4vers.h"
#include "dk4isadm.h"
#include "dk4strd.h"
#include "dk4strda.h"
#include "dk4mem.h"
#include "dk4mema.h"
#include "dk4fopda.h"
#include "dk4pathd.h"



$!trace-include



/**	Connected peer.
*/
typedef struct {
  dk4_sockaddr_storage_t	peeraddr;	/**< Peer address. */
  dk4_um_t			num;		/**< Number of client. */
  size_t			peerlen;	/**< Length of peer address. */
  dk4_socket_t			sock;		/**< Socket for transfer. */
} dk_send_client_t;



/**	Constant texts used by the program, not localized.
*/
static const dkChar * const	dk_send_kwnl[] = {
$!string-table	macro=dkT
#
#	0	Program group name
#
dktools
#
#	1	Help text file name
#
dk-send.txt
#
#	2	String table file name
#
dk-send.str
#
#	3	Keyword unlimited for number of clients
#
unlimited
#
#	4	Path separator for Windows
#
\\
#
#	5	File open mode: Read binary.
#
rb
$!end
};



/**	Text used by the program, replaced by localized texts if found.
*/
static const dkChar * const	dk_send_kw_def[] = {
$!string-table macro=dkT
#
#	0	Error: Failed to set up signal handlers!
#
Failed to set up signal handlers!
#
#	1	Error: Failed to restore signal handlers!
#
Failed to restore signal handlers!
#
#	2	Name of input file just processed (default).
#
stdin
#
#	3	Progress: Accepting incoming connection requests.
#
Accepting incoming connection requests.
#
#	4	Error: Problem with peer address length!
#
Problem with peer address length!
#
#	5	Progress: Connected ...
#
Connected: 
#
#	6	Debug: Rejected ...
#
Rejected: 
#
#	7	Progress: Starting data transfer.
#
Starting data transfer.
#
#	8	Progress: Finished data transfer.
#
Finished data transfer.
#
#	9	ERROR: Disconnected ...
#
Disconnected: 
#
#	10 11	ERROR: Invalid number of clients ...!
#
Invalid number of clients "
"!
#
#	12	ERROR: Wrong number of command line arguments!
#
Wrong number of command line arguments!
#
#	13	ERROR: Aborted by INT signal!
#
Aborted by INT signal!
#
#	14	ERROR: Aborted by TERM signal!
#
Aborted by TERM signal!
#
#	15	Debug: Not a dk-send client ...
#
Not a dk-send client: 
#
#	16 17 18
#
Timeout too large!
Timeout must not be negative!
Timeout value not found!
#
#	19
#
Stop processing as all clients are disconnected!
$!end
};



/**	Short help text.
*/
static const dkChar * const	dk_send_help_text[] = {
$!text	macro=dkT

Send file to one or multiple recipients (dk-recv processes).

dk-send [<options>] <port> [<file>]

Options:
-n <int>			Number of clients, ``unlimited'' or 0
				for no limit.
-a <address>[/<mask>][,...]	Allowed clients.
-l				Listen on local host ports only.
-b <unsigned>			Listen backlog (number of connection attempts
				to queue).
-c <timeout>			Timeout for read attempt after establishing
				a new connection.
-p				Running as sink in a pipe (do not abort reading
				input if all clients disconnected unexpectedly).
--help				Show this short help text.
--manual			*** SHOW FULL MANUAL. ***
--version			Show version information.
--license			Show license information.

$!end
};



/**	License text.
*/
static const dkChar * const	dk_send_license_text[] = {
$!text	macro=dkT,preprocessor
This software uses code from the following projects, either directly or as
a library:

dktools		Dirk Krause's tools and libraries.
		See http://dktools.sourceforge.net/ for more information.
#if DK4_HAVE_ZLIB_H

zlib		Data compression library.
		See http://www.zlib.net/ for more information.
#endif
#if DK4_HAVE_BZLIB_H

bzip2		Data compression program and library.
		See http://www.bzip.org/ for more information.
#endif
#if DK4_HAVE_OPENSSL_MD5_H && DK4_HAVE_OPENSSL_SHA_H && DK4_HAVE_OPENSSL_RIPEMD_H

OpenSSL		Cryptographic toolkit, used to build file checksums here.
		See http://www.openssl.org/ for more information.

This product includes software developed by the OpenSSL Project for use in
the OpenSSL Toolkit (http://www.openssl.org/).
This product includes cryptographic software written by
Eric Young (eay@cryptsoft.com).
This product includes software written by Tim Hudson (tjh@cryptsoft.com).
#endif

All the licenses below apply to the program.
Licenses for used libraries are shown as found on my Scientific Linux 6.x
computer in the /usr/share/doc directory on 2015-04-01. Check the project
homepages of the used libraries for additional information and/or updated
license terms.


DK tools and libraries license
==============================
Copyright (c) 2015-2016, Dirk Krause
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* 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.
* Neither the name of the Dirk Krause nor the names of contributors may be
  used to endorse or promote products derived from this software without
  specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
#if DK4_HAVE_ZLIB_H


Zlib license
============
(C) 1995-2004 Jean-loup Gailly and Mark Adler

This software is provided 'as-is', without any express or implied
warranty.  In no event will the authors be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software. If you use this software
   in a product, an acknowledgment in the product documentation would be
   appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.

Jean-loup Gailly        Mark Adler
jloup@gzip.org          madler@alumni.caltech.edu
#endif
#if DK4_HAVE_BZLIB_H


Bzip2 and libbzip2 library license
==================================
This program, "bzip2", the associated library "libbzip2", and all
documentation, are copyright (C) 1996-2007 Julian R Seward.  All
rights reserved.

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. The origin of this software must not be misrepresented; you must 
   not claim that you wrote the original software.  If you use this 
   software in a product, an acknowledgment in the product 
   documentation would be appreciated but is not required.

3. Altered source versions must be plainly marked as such, and must
   not be misrepresented as being the original software.

4. 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 ``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 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.

Julian Seward, jseward@bzip.org
bzip2/libbzip2 version 1.0.5 of 10 December 2007
#endif
#if DK4_HAVE_OPENSSL_MD5_H && DK4_HAVE_OPENSSL_SHA_H && DK4_HAVE_OPENSSL_RIPEMD_H


OpenSSL license
===============

LICENSE ISSUES
--------------

The OpenSSL toolkit stays under a dual license, i.e. both the conditions of
the OpenSSL License and the original SSLeay license apply to the toolkit.
See below for the actual license texts. Actually both licenses are BSD-style
Open Source licenses. In case of any license issues related to OpenSSL
please contact openssl-core@openssl.org.

OpenSSL License
---------------

Copyright (c) 1998-2011 The OpenSSL Project.  All rights reserved.

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. All advertising materials mentioning features or use of this
   software must display the following acknowledgment:
   "This product includes software developed by the OpenSSL Project
   for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   endorse or promote products derived from this software without
   prior written permission. For written permission, please contact
   openssl-core@openssl.org.

5. Products derived from this software may not be called "OpenSSL"
   nor may "OpenSSL" appear in their names without prior written
   permission of the OpenSSL Project.

6. Redistributions of any form whatsoever must retain the following
   acknowledgment:
   "This product includes software developed by the OpenSSL Project
   for use in the OpenSSL Toolkit (http://www.openssl.org/)"

THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
EXPRESSED 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 OpenSSL PROJECT OR
ITS 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.

This product includes cryptographic software written by Eric Young
(eay@cryptsoft.com).  This product includes software written by Tim
Hudson (tjh@cryptsoft.com).


Original SSLeay License
-----------------------

Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
All rights reserved.

This package is an SSL implementation written
by Eric Young (eay@cryptsoft.com).
The implementation was written so as to conform with Netscapes SSL.

This library is free for commercial and non-commercial use as long as
the following conditions are aheared to.  The following conditions
apply to all code found in this distribution, be it the RC4, RSA,
lhash, DES, etc., code; not just the SSL code.  The SSL documentation
included with this distribution is covered by the same copyright terms
except that the holder is Tim Hudson (tjh@cryptsoft.com).

Copyright remains Eric Young's, and as such any Copyright notices in
the code are not to be removed.
If this package is used in a product, Eric Young should be given attribution
as the author of the parts of the library used.
This can be in the form of a textual message at program startup or
in documentation (online or textual) provided with the package.

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 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. All advertising materials mentioning features or use of this software
   must display the following acknowledgement:
   "This product includes cryptographic software written by
    Eric Young (eay@cryptsoft.com)"
   The word 'cryptographic' can be left out if the rouines from the library
   being used are not cryptographic related :-).
4. If you include any Windows specific code (or a derivative thereof) from 
   the apps directory (application code) you must include an acknowledgement:
   "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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.

The licence and distribution terms for any publically available version or
derivative of this code cannot be changed.  i.e. this code cannot simply be
copied and put under another distribution licence
[including the GNU Public Licence.]

#endif

$!end
};



/**	Options for this program.
*/
static const dk4_option_specification_t dk_send_options[] = {
  { dkT('n'),	dkT("number-of-clients"),	DK4_OPT_ARG_STRING },
  { dkT('a'),	dkT("allow"),			DK4_OPT_ARG_STRING },
  { dkT('l'),	dkT("local-only"),		DK4_OPT_ARG_NONE },
  { dkT('p'),   dkT("pipe"),			DK4_OPT_ARG_NONE },
  { dkT('b'),	dkT("backlog"),			DK4_OPT_ARG_UNSIGNED },
  { dkT('c'),	dkT("connect-timeout"),		DK4_OPT_ARG_DOUBLE }
};



/**	Buffer for sending.
	Initial value: 1460
*/
#if DK4_SIZEOF_SIZE_T > 2
static	char		dk_send_buf[1048576];
#else
static	char		dk_send_buf[16384];
#endif


/**	Application structure for diagnostics.
*/
static	dk4_app_t	*app	=	NULL;



/**	Localized texts or default texts.
*/
static	const dkChar * const	*dk_send_msg	= dk_send_kw_def;



/**	Collection of allowed clients.
*/
static	dk4_sto_t	*s_allowed	=	NULL;



/**	Iterator through allowed clients collection.
*/
static	dk4_sto_it_t	*i_allowed	=	NULL;



/**	Number of expected clients.
*/
static	dk4_um_t	 numclients	=	(dk4_um_t)1UL;



/**	Number of elements in the dk_send_msg array.
*/
static	size_t		dk_send_sz_msg =
sizeof(dk_send_kw_def)/sizeof(DK4_PDKCHAR) - 1;



/**	Number of elements in the dk_send_options array.
*/
static	size_t		 dk_send_sz_options	=
sizeof(dk_send_options)/sizeof(dk4_option_specification_t);



/**	Seconds for read timeout.
*/
static	long		 dk_send_timeout_secs	= 0L;



/**	Microseconds for read timeout.
*/
static	long		 dk_send_timeout_usecs	= 0L;



/**	Exit status code returned by the program.
*/
static	int		 exval		=	EXIT_FAILURE;



/**	Flag: Running as pipe, avoid SIGPIPE.
*/
static	int		 is_pipe	=	0;



/**	Flag: Allow only connections from localhost.
*/
static	int		 local_only	=	0;



/**	Number of outstanding connection requests to queue.
*/
static	int		 backlog	=	10;



#ifdef SIGPIPE
/**	Indicator: SIGPIPE signal received.
*/
static
DK4_VOLATILE
dk4_sig_atomic_t	sig_had_pipe	=	0;
#endif

/**	Indicator: SIGINT signal received.
*/
static
DK4_VOLATILE
dk4_sig_atomic_t	sig_had_int	=	0;

/**	Indicator: SIGTERM signal received.
*/
static
DK4_VOLATILE
dk4_sig_atomic_t	sig_had_term	=	0;



/**	Pass a volatile pointer to an atomic integer.
	This function is necessary as some compilers mis-optimize
	direct access to volatile variables (at least if you believe
	one of the coding standards).
	@param	ptr	Address of atomic integer variable.
	@return	The unmodified pointer.
*/
static
DK4_VOLATILE
dk4_sig_atomic_t *
sig_pass_pointer(DK4_VOLATILE dk4_sig_atomic_t *ptr)
{
  return ptr;
}



#ifdef SIGPIPE
/**	Handler for SIGPIPE signal.
	@param	signo	Signal number (always SIGPIPE, ignored).
*/
static
void
sig_handler_pipe(int signo)
{
  *sig_pass_pointer(&sig_had_pipe) = 1;
}
#endif

/**	Handler for SIGINT signal.
	@param	signo	Signal number (always SIGINT, ignored).
*/
static
void
sig_handler_int(int signo)
{
  *sig_pass_pointer(&sig_had_int) = 1;
}

/**	Handler for SIGTERM signal.
	@param	signo	Signal number (always SIGTERM, ignored).
*/
static
void
sig_handler_term(int signo)
{
  *sig_pass_pointer(&sig_had_term) = 1;
}

/**	Read value from volatile atomic type.
	This function is necessary as some compilers mis-optimize
	direct access to volatile variables (at least if you believe
	one of the coding standards).
	@param	ap	Pointer to volatile atomic variable.
	@return	Contents of the variable.
*/
static
dk4_sig_atomic_t
sig_read_atomic(DK4_VOLATILE dk4_sig_atomic_t *ap)
{
  return (*ap);
}

/**	Check whether we can continue or if a signal was received.
	@param	check_pipe	Flag: Check for occured SIGPIPE signal too.
	@return	1 if the program can continue, 0 if a signal was received.
*/
static
int
sig_can_continue(int check_pipe)
{
  int		back = 1;
#ifdef SIGPIPE
  if (0 != check_pipe) {
    if (0 != sig_read_atomic(&sig_had_pipe)) { back = 0; }
  }
#endif
  if (0 != sig_read_atomic(&sig_had_int )) { back = 0; }
  if (0 != sig_read_atomic(&sig_had_term)) { back = 0; }
  return back;
}



/**	Check whether we can continue.
	@return	1 for yes, 0 for no.
*/
static
int
dk_send_can_continue(void)
{
  int		back	=	1;
  $? "+ dk_send_can_continue"
  if (0 == sig_can_continue(0)) {
    back = 0;
  }
  $? "- dk_send_can_continue %d", back
  return back;
}



/**	Compare two connected clients.
	@param	l	Left client.
	@param	r	Right client.
	@param	cr	Comparison criteria (ignored).
	@return	1 if l>r, 0 if l=r, -1 if l<r.
*/
static
int
dk_send_compare_clients(const void *l, const void *r, int cr)
{
  const dk_send_client_t *pl;
  const dk_send_client_t *pr;
  int			  back = 0;
  if (NULL != l) {
    if (NULL != r) {
      pl = (const dk_send_client_t *)l;
      pr = (const dk_send_client_t *)r;
      if (pl->num > pr->num) {
        back = 1;
      } else {
        if (pl->num < pr->num) {
	  back = -1;
	} else {
	  if (pl->sock > pr->sock) {
	    back = 1;
	  } else {
	    if (pl->sock < pr->sock) {
	      back = -1;
	    }
	  }
	}
      }
    } else { back = 1; }
  } else {
    if (NULL != r) { back= -1; }
  }
  return back;
}



/**	Obtain information about allowed clients from string.
	@param	argcpy	Copy of string, can be modified.
	@return	1 on success, 0 on error.
*/
static
int
dk_send_get_allowed_clients(dkChar *argcpy)
{
  dk4_allowed_peer_t	 peer;
  dk4_er_t		 er;
  dk4_allowed_peer_t	*npeer	= NULL;
  dkChar		*pc	= NULL;
  dkChar		*pn	= NULL;
  int			 back	= 0;
  int			 res	= 0;
  $? "+ dk_send_get_allowed_clients \"%!ds\"", TR_STR(argcpy)
  s_allowed = dk4sto_open(NULL);
  if (NULL != s_allowed) {
    dk4sto_set_comp(s_allowed, dk4socket_allowed_peer_compare, 0);
    i_allowed = dk4sto_it_open(s_allowed, NULL);
    if (NULL != i_allowed) {
      back = 1;
      pc = argcpy;
      do {
        pn = dk4str_chr(pc, dkT(','));
	if (NULL != pn) { *(pn++) = dkT('\0'); }
	DK4_MEMRES(&peer, sizeof(peer));
	dk4error_init(&er);
	res = dk4socket_get_allowed_peer(&peer, pc, &er);
	if (DK4_SOCKET_RESULT_SUCCESS == res) {
	  npeer = dk4mem_new_app(dk4_allowed_peer_t,1,app);
	  if (NULL != npeer) {
	    DK4_MEMCPY(npeer, &peer, sizeof(peer));
	    if (0 == dk4sto_add(s_allowed, npeer, NULL)) {
	      /* ERROR: Memory */
	      dk4app_log_base1(app, DK4_LL_ERROR, 90);
	      dk4mem_free(npeer);
	      npeer = NULL;
	      back = 0;
	    }
	  } else {
	    /* ERROR: Memory, already reported */
	    back = 0;
	  }
	} else {
	  /* ERROR: Failed to obtain peer information from string */
	  dk4socket_log_simple_3(
	    app, DK4_LL_ERROR, 141, 142, pc, &er
	  );
	  back = 0;
	}
	pc = pn;
      } while ((NULL != pc) && (1 == back));
    } else {
      /* ERROR: Memory */
      dk4app_log_base1(app, DK4_LL_ERROR, 90);
    }
  } else {
    /* ERROR: Memory */
    dk4app_log_base1(app, DK4_LL_ERROR, 90);
  }
  $? "- dk_send_get_allowed_clients %d", back
  return back;
}



static
int
dk_send_check_peer_address(dk4_sockaddr_storage_t *sasto, size_t soalen)
{
  struct sockaddr	*psoa;
  int		 	 back = 0;
  if (NULL != sasto) {
    psoa = (struct sockaddr *)sasto;
    switch (psoa->sa_family) {
      case AF_INET : {
        if (sizeof(struct sockaddr_in) == soalen) {
	  back = 1;
	}
      } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6 && defined(AF_INET6)
      case AF_INET6 : {
        if (sizeof(struct sockaddr_in6) == soalen) {
	  back = 1;
	}
      } break;
#endif
    }
  }
  return back;
}



/**	Accept incoming connections and transfer data.
	@param	portname	Port name to listen.
	@param	infile		Input file to read data from.
	@param	filename	Input file name.
*/
static
void
dk_send_do_networking(
  const dkChar	*portname,
  FILE		*infile,
  const dkChar	*filename
)
{
  dkChar			 peerbuf[1072];
  const dkChar			*msgparts[4];
  fd_set			 rfds;
  dk4_sockaddr_storage_t	 sasto;
  struct sockaddr		*psoa		= NULL;
  dk4_socket_set_t		*listeners	= NULL;
  dk4_sto_t			*s_clients	= NULL;
  dk4_sto_it_t			*i_clients	= NULL;
  dk_send_client_t		*pcl		= NULL;
  char				*bufstart;	/* Start of remaining buf */
  dk4_um_t			 numcl		= (dk4_um_t)0UL;
  dk4_socket_t			 max = 0;	/* Maximum socket number */
  dk4_socket_t			 ncsock;	/* New client socket */
  size_t			 i;		/* Traverse socket set */
  size_t			 soalen;	/* Socket address length */
  size_t			 rdbytes;	/* Bytes read from file */
  size_t			 wrbytes;	/* Bytes written to socket */
  size_t			 wrpart;	/* Bytes written in this part */
  int				 cc;		/* Flag: Can continue in loop */
  int				 ccwr;		/* Flag: Continue send loop */
  int				 res;		/* Operation result */
  int				 allowed;	/* Client from allowed peer */
  int				 anya;		/* Flag: Recipients alive */
  unsigned char			 tra;

  $? "+ dk_send_do_networking"
  /*	Create storage and iterator for connected clients.
  */
  s_clients = dk4sto_open(NULL);
  if (NULL == s_clients) {
    /* ERROR: Memory */
    dk4app_log_base1(app, DK4_LL_ERROR, 90);
    goto finished;
  }
  dk4sto_set_comp(s_clients, dk_send_compare_clients, 0);
  i_clients = dk4sto_it_open(s_clients, NULL);
  if (NULL == i_clients) {
    /* ERROR: Memory */
    dk4app_log_base1(app, DK4_LL_ERROR, 90);
    goto finished;
  }

  /*	Create listener socket set.
  */
  listeners = dk4socket_set_service_app(portname, backlog, local_only, app);
  if (NULL == listeners) { goto finished; }

  /*	Accept connection requests.
  */
  /* PROGRESS: Accepting incoming connection requests */
  dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_PROGRESS, 3);
  cc = 1;
  for (i = 0; i < listeners->szUsed; i++) {
    if (0 == i) {
      max = (listeners->pSockets)[i];
    } else {
      if (max < (listeners->pSockets)[i]) { max = (listeners->pSockets)[i]; }
    }
  }
  while (1 == cc) {
    if (0 != dk_send_can_continue()) {
      /* Prepare read file descriptor set */
      FD_ZERO(&rfds);
      for (i = 0; i < listeners->szUsed; i++) {
        FD_SET( (listeners->pSockets)[i], &rfds );
      }
      res = select( (int)(max+1), &rfds, NULL, NULL, NULL );
      if (0 < res) {
        for (i = 0; i < listeners->szUsed; i++) {
	  if (FD_ISSET((listeners->pSockets)[i], &rfds)) {
	    /* Accept connection request */
	    soalen = sizeof(sasto);
	    ncsock = dk4socket_accept_app(
	      (listeners->pSockets)[i],(struct sockaddr *)(&sasto),&soalen,app
	    );
	    if (INVALID_SOCKET != ncsock) {
	      allowed = 1;
	      if ((NULL != s_allowed) && (NULL != i_allowed)) { $? ". check"
	        /* Check peer address */
		if (0 != dk_send_check_peer_address(&sasto, soalen)) {
		  if (NULL == dk4sto_it_find_like(i_allowed, &sasto, 1)) {
		    allowed = 0;			$? "! not found"
		  } else {				$? ". found"
		  }
		} else {				$? "! address length"
		  /* ERROR: Peer address length problem */
		  dk4app_log_1(app,dk_send_msg,dk_send_sz_msg,DK4_LL_ERROR,4);
		  allowed = 0;
		}
	      } else {					$? ". no check"
	      }
	      if (1 == allowed) {
	        pcl = dk4mem_new_app(dk_send_client_t,1,app);
		if (NULL != pcl) {
		  pcl->num = numcl;
		  pcl->sock = ncsock;
		  DK4_MEMCPY( &(pcl->peeraddr), &sasto, sizeof(dk4_sockaddr_storage_t) );
		  pcl->peerlen = soalen;
		  if (0 != dk4sto_add(s_clients, pcl, NULL)) {
		    tra = 0x00;
		    soalen = sizeof(tra);
		    res = dk4socket_recv_app(
		      ncsock, &tra, &soalen, 0,
		      dk_send_timeout_secs, dk_send_timeout_usecs,
		      app
		    );
		    if (DK4_SOCKET_RESULT_SUCCESS == res) {
		      if (0 < soalen) {
		        numcl++;
		        if (0x00 != tra) {
			  cc = 0;
			  i = listeners->szUsed;
			}
			if ((dk4_um_t)0UL < numclients) {
			  if (numcl >= numclients) {
			    cc = 0;
			    i = listeners->szUsed;
			  }
			}
			/* Simple message to stdout - accepted
			*/
			if (0 != dk4app_log_do(app, DK4_LL_PROGRESS)) { $? ". p"
			  psoa = (struct sockaddr *)(&sasto);
			  res = dk4socket_addr_port_to_text(
			    peerbuf, DK4_SIZEOF(peerbuf,dkChar),
			    psoa->sa_family,
			    (const struct sockaddr *)(&sasto), pcl->peerlen,
			    NULL
			  );
			  if (DK4_SOCKET_RESULT_SUCCESS == res) {	$? ". r"
			    msgparts[0] = dk_send_msg[5];
			    msgparts[1] = peerbuf;
			    dk4app_log_msg(
			      app, DK4_LL_PROGRESS, msgparts, 2
			    );		$? ". dk4socket_addr_port_to_text"
			  } else {	$? "! dk4socket_addr_port_to_text"
			  }
			} else {	$? ". no progress"
			}
		      } else {
		        /* ERROR: Nothing was read from socket */
			if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
			  psoa = (struct sockaddr *)(&sasto);
			  res = dk4socket_addr_port_to_text(
			    peerbuf, DK4_SIZEOF(peerbuf,dkChar),
			    psoa->sa_family,
			    (const struct sockaddr *)(&sasto), pcl->peerlen,
			    NULL
			  );
			  if (DK4_SOCKET_RESULT_SUCCESS == res) {
			    msgparts[0] = dk_send_msg[15];
			    msgparts[1] = peerbuf;
			    dk4app_log_msg(
			      app, DK4_LL_DEBUG, msgparts, 2
			    );
			  }
			}
			dk4socket_close(pcl->sock, NULL);
			if (0 != dk4sto_remove(s_clients, pcl, NULL)) {
			  dk4mem_free(pcl);
			}
		      }
		    } else {
		      /* ERROR: Failed to read from socket */
		      if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
		        psoa = (struct sockaddr *)(&sasto);
		        res = dk4socket_addr_port_to_text(
		          peerbuf, DK4_SIZEOF(peerbuf,dkChar),
		          psoa->sa_family,
		          (const struct sockaddr *)(&sasto), pcl->peerlen,
		          NULL
		        );
		        if (DK4_SOCKET_RESULT_SUCCESS == res) {
		          msgparts[0] = dk_send_msg[15];
		          msgparts[1] = peerbuf;
		          dk4app_log_msg(
		            app, DK4_LL_DEBUG, msgparts, 2
		          );
		        }
		      }
		      dk4socket_close(pcl->sock, NULL);
		      if (0 != dk4sto_remove(s_clients, pcl, NULL)) {
		        dk4mem_free(pcl);
		      }
		    }
		  } else {
		    /* ERROR: Memory */
		    dk4app_log_base1(app, DK4_LL_ERROR, 90);
		    cc = -1;
		    i = listeners->szUsed;
		    dk4socket_close(ncsock, NULL);
		    dk4mem_free(pcl);
		  }
		} else {
		  cc = -1;
		  i = listeners->szUsed;
		  dk4socket_close(ncsock, NULL);
		}
	      } else {
	        /* ERROR: Denied - Simple message to stdout */
		if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
		  psoa = (struct sockaddr *)(&sasto);
		  res = dk4socket_addr_port_to_text(
		    peerbuf, DK4_SIZEOF(peerbuf,dkChar),
		    psoa->sa_family,
		    (const struct sockaddr *)(&sasto), soalen,
		    NULL
		  );
		  if (DK4_SOCKET_RESULT_SUCCESS == res) {
		    msgparts[0] = dk_send_msg[6];
		    msgparts[1] = peerbuf;
		    dk4app_log_msg(
		      app, DK4_LL_DEBUG, msgparts, 2
		    );
		  }
		}
		dk4socket_close(ncsock, NULL);
	      }
	    } else {
	      /* Accept failed */
	      if (0 == dk_send_can_continue()) { cc = -1; }
	    }
	  }
	}
      } else {
        if (0 == dk_send_can_continue()) { cc = -1; }
      }
    } else {
      cc = -1;
    }
  }
  if (0 != cc) { goto finished; }

  /*	All preparations succeeded.
  */
  exval = EXIT_SUCCESS;

  /*	Transfer data.
  */
  dk4socket_set_close(listeners, NULL);
  listeners = NULL;
  /* PROGRESS: Starting data transfer */
  dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_PROGRESS, 7);
  cc = 1;
  anya = 1;
  while ((1 == cc) && ((0 != anya) || (0 != is_pipe))) {
    if (0 != dk_send_can_continue()) {
      rdbytes = fread(dk_send_buf, 1, sizeof(dk_send_buf), infile);
      if (0 < rdbytes) {	$? ". fread -> %u bytes", (unsigned)rdbytes
        anya = 0;
	dk4sto_it_reset(i_clients);
	do {
	  pcl = (dk_send_client_t *)dk4sto_it_next(i_clients);
	  if (NULL != pcl) {
	    if (INVALID_SOCKET != pcl->sock) {	$? ". client connection"
	      bufstart = dk_send_buf;
	      wrbytes = 0;
	      ccwr = 1;
	      do {
	        if (0 != dk_send_can_continue()) {
	          wrpart = rdbytes - wrbytes;
		  $? ". wrpart=%u", (unsigned)wrpart
		  res = dk4socket_send_app(
		    pcl->sock, bufstart, &wrpart, 0, 0L, 0L, app
		  );
		  switch (res) {
		    case DK4_SOCKET_RESULT_SUCCESS :
		    case DK4_SOCKET_RESULT_IN_PROGRESS : {
		      $? ". success or partial success"
		      wrbytes += wrpart;
		      $? ". bytes written %u", (unsigned)wrbytes
		      if (wrbytes >= rdbytes) {
		        ccwr = 0;	$? ". finished"
		      } else {		$? ". must continue"
		        bufstart = &(bufstart[wrpart]);
		      }
		    } break;
		    default : {	$? "! failed to send"
		      /* ERROR: Failure on socket */
		      ccwr = -1;
		      exval = EXIT_FAILURE;
		      dk4socket_close(pcl->sock, NULL);
		      pcl->sock = INVALID_SOCKET;
		      if (0 != dk4app_log_do(app, DK4_LL_ERROR)) {
		        psoa = (struct sockaddr *)(&(pcl->peeraddr));
		        res = dk4socket_addr_port_to_text(
		          peerbuf, DK4_SIZEOF(peerbuf,dkChar),
		          psoa->sa_family,
		          (const struct sockaddr *)(&(pcl->peeraddr)),
		          pcl->peerlen,
		          NULL
		        );
		        if (DK4_SOCKET_RESULT_SUCCESS == res) {
		          msgparts[0] = dk_send_msg[9];
		          msgparts[1] = peerbuf;
		          dk4app_log_msg(
		            app, DK4_LL_ERROR, msgparts, 2
		          );
		        }
		      }
		    } break;
		  }
		} else {
		  ccwr = -1;
		}
	      } while (1 == ccwr);
	      if (0 == ccwr) {
	        anya = 1;
	      }
	      $? ". ccwr = %d", ccwr
	    }
	  }
	  if (0 == dk_send_can_continue()) {
	    cc = -1;
	    pcl = NULL;
	  }
	} while (NULL != pcl);
        if (0 != feof(infile)) {
	  cc = 0;
	}
      } else {
        cc = 0;
      }
    } else {
      cc = -1;
    }
  }
  if ((1 == cc) && (0 == anya)) {
    /* Warning: All clients disconnected */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_WARNING, 19);
  }
  /* PROGRESS: Finished data transfer */
  dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_PROGRESS, 8);
  if (0 != cc) {
    exval = EXIT_FAILURE;
    goto finished;
  }

  /*	Shut down all sockets.
  */
  cc = 1;
  dk4sto_it_reset(i_clients);
  while (1 == cc) {
    if (0 != dk_send_can_continue()) {
      pcl = (dk_send_client_t *)dk4sto_it_next(i_clients);
      if (NULL != pcl) {
        if (INVALID_SOCKET != pcl->sock) {
	  res = dk4socket_shutdown_app(pcl->sock, DK4_SOCKET_SHUT_WRITE, app);
	  if (DK4_SOCKET_RESULT_SUCCESS != res) {
	    exval = EXIT_FAILURE;
	    dk4socket_close(pcl->sock, NULL);
	    pcl->sock = INVALID_SOCKET;
	  }
	}
      } else {
        cc = 0;
      }
    } else {
      cc = -1;
    }
  }

  /*	For orderly release read from sockets until we have 0 bytes input.
  */
  dk4sto_it_reset(i_clients);
  do {
    if (0 != dk_send_can_continue()) {
      pcl = (dk_send_client_t *)dk4sto_it_next(i_clients);
      if (NULL != pcl) {
        cc = 1;
	while (1 == cc) {
	  rdbytes = sizeof(dk_send_buf);
	  res = dk4socket_recv(
	    pcl->sock, dk_send_buf, &rdbytes, 0, 0L, 0L, NULL
	  );
	  if (DK4_SOCKET_RESULT_SUCCESS == res) {
	    if (0 == rdbytes) {
	      cc = 0;
	    }
	  } else {
	    cc = 0;
	  }
	  if (0 == dk_send_can_continue()) {
	    cc = 0;
	    pcl = NULL;
	  }
	}
      }
    } else {
      pcl = NULL;
    }
  } while (NULL != pcl);
  
  /*	Finally clean up.
  */
  finished:
  /* Close the connection sockets */
  if ((NULL != i_clients) && (NULL != s_clients)) {
    dk4sto_it_reset(i_clients);
    do {
      pcl = (dk_send_client_t *)dk4sto_it_next(i_clients);
      if (NULL != pcl) {
        if (INVALID_SOCKET != pcl->sock) {
	  dk4socket_close(pcl->sock, NULL);
	}
      }
    } while (NULL != pcl);
  }
  /* Close listener socket set */
  if (NULL != listeners) {
    dk4socket_set_close(listeners, NULL);
  }
  /* Clean up connection container and iterator */
  if (NULL != i_clients) {
    dk4sto_it_reset(i_clients);
    do {
      pcl = (dk_send_client_t *)dk4sto_it_next(i_clients);
      if (NULL != pcl) {
        dk4mem_free(pcl);
      }
    } while (NULL != pcl);
    dk4sto_it_close(i_clients);
  }
  if (NULL != s_clients) {
    dk4sto_close(s_clients);
  }
  $? "- dk_send_do_networking"
}



/**	Process command line arguments, and continue.
	@param	portname	Port name to listen.
	@param	infile		Input file to read data from.
	@param	filename	Input file name.
*/
static
void
dk_send_process_cmdline_args(
  const dkChar	*portname,
  FILE		*infile,
  const dkChar	*filename
)
{
  const dkChar		*argptr	= NULL;
  const dkChar		*endptr	= NULL;
  const dkChar		*argval	= NULL;
  dkChar		*argcpy = NULL;
  dk4_allowed_peer_t	*ppeer;
  double		 timeout	= 0.0;
  double		 td1		= 0.0;
  double		 td2		= 0.0;
  dk4_um_t		 um	= (dk4_um_t)0UL;
  int			 res	= 0;
  $? "+ dk_send_process_cmdline_args"
  /*	Check whether to allow local connections only.
  */
  if (0 != dk4app_opt_is_set_short(app, dkT('l'), NULL)) {
    local_only = 1;
  }
  if (0 != dk4app_opt_is_set_short(app, dkT('p'), NULL)) {
    is_pipe = 1;
  }
  /*	Set up backlog
  */
  if (0 != dk4app_opt_is_set_short(app, dkT('b'), NULL)) {
    if (0 != dk4app_opt_get_unsigned_short(&um, app, dkT('b'), NULL)) {
      if ((dk4_um_t)(INT_MAX) >= um) {
        if ((dk4_um_t)0UL < um) {
          backlog = (int)um;
	} else {
	  backlog = 1;
	}
      } else {
        backlog = INT_MAX;
      }
    } else {
      /* ERROR: Not an unsigned number, must not happen */
      goto finished;
    }
  }
  /*	Find timeout settings.
  */
  if (0 != dk4app_opt_is_set_short(app, dkT('c'), NULL)) {
    if (0 != dk4app_opt_get_double_short(&timeout, app, dkT('c'), NULL)) {
      if (0.0 <= timeout) {
        td1 = floor(timeout);
	td2 = timeout - td1;
	td2 = td2 * 1000000.0;
	if ((double)(LONG_MAX) >= td1) {
	  dk_send_timeout_secs  = (long)td1;
	  dk_send_timeout_usecs = (long)td2;
	} else {
	  /* ERROR: Timeout value too large! */
          dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 16);
	  goto finished;
	}
      } else {
        /* ERROR: Can not use negative timeout */
        dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 17);
	goto finished;
      }
    } else {
      /* ERROR: Not timeout value found */
      dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 18);
      goto finished;
    }
  }
  /*	Find number of clients.
  */
  if (0 != dk4app_opt_is_set_short(app, dkT('n'), NULL)) {
    argval = dk4app_opt_get_string_ptr_short(app, dkT('n'), NULL);
    if (dk4str_cmp(dk_send_kwnl[3], argval) == 0) {
      numclients = (dk4_um_t)0UL;
    } else {
      res = dk4ma_input_dk_dec_dk4_um_t(
        &numclients, argval, &endptr, 1, NULL
      );
      if (0 == res) {
        /* ERROR: Invalid option argument */
	dk4app_log_3(
	  app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 10, 11, argval
	);
	goto finished;
      }
    }
  }					$? ". number of clients ok"
  /*	Find allowed client addresses.
  */
  if (0 != dk4app_opt_is_set_short(app, dkT('a'), NULL)) {
    argptr = dk4app_opt_get_string_ptr_short(app, dkT('a'), NULL);
    if (NULL == argptr) {
      /* ERROR: Failed to obtain Argument */
      $? "! BUG, Failed to obtain option argument"
      goto finished;
    }
    argcpy = dk4str_dup_app(argptr, app);
    if (NULL == argcpy) { goto finished; }
    if (0 == dk_send_get_allowed_clients(argcpy)) { goto finished; }
  }					$? ". remote address ok"
  /*	Do the network transmission.
  */
  dk_send_do_networking(portname, infile, filename);
					$? ". going to release resources"
  /*	Finally release resources.
  */
  finished:
  if (NULL != argcpy) {
    dk4mem_free(argcpy);
  }
  if (NULL != s_allowed) {
    if (NULL != i_allowed) {
      dk4sto_it_reset(i_allowed);
      do {
        ppeer = (dk4_allowed_peer_t *)dk4sto_it_next(i_allowed);
	if (NULL != ppeer) {
	  dk4mem_free(ppeer);
	}
      } while(NULL != ppeer);
      dk4sto_it_close(i_allowed);
      i_allowed = NULL;
    }
    dk4sto_close(s_allowed);
    s_allowed = NULL;
  }
  $? "- dk_send_process_cmdline_args"
}



/**	Bring Winsock up before performing other steps.
	@param	portname	Port name to listen.
	@param	infile		Input file to read data from.
	@param	filename	Input file name.
*/
static
void
dk_send_run_for_file(
  const dkChar	*portname,
  FILE		*infile,
  const dkChar	*filename
)
{
  if (dk4socket_up_app(app)) {
    dk_send_process_cmdline_args(portname, infile, filename);
    dk4socket_down_app(app);
  }
}



/**	Run for real file name.
	@param	portname	Port name.
	@param	filename	File name, no further expansion required.
*/
static
void
dk_send_run_for_real_file_name(const dkChar *portname, const dkChar *filename)
{
  FILE	*inf;
  int		 tests	= DK4_FOPEN_SC_USER;
  if (dk4isadmin()) { tests = DK4_FOPEN_SC_PRIVILEGED; }
  inf = dk4fopen_app(filename, dk_send_kwnl[5], tests, app);
  if (NULL != inf) {
    dk_send_run_for_file(portname, inf, filename);
    fclose(inf);
  }
}



#if DK4_ON_WINDOWS

/**	Expand file name and run for file.
	@param	portname	Port name (first command line argument).
	@param	filename	File name pattern.
*/
static
void
dk_send_expand_filename(const dkChar *portname, const dkChar *filename)
{
  dkChar		 buf[DK4_MAX_PATH];
  dk4_dir_t		*fne;
  const dkChar		*fn;
  const dkChar		*pt;
  size_t		 szbuf	= DK4_SIZEOF(buf,dkChar);
  int			 copied	= 0;

  fne = dk4app_fne_open(filename, app);
  if (NULL != fne) {
    fn = dk4dir_next_file(fne);
    if (NULL != fn) {
      pt = dk4dir_get_path(fne);
      if (NULL == dk4dir_next_file(fne)) {
        if (NULL != pt) {
	   copied = 0;
	   if (0 != dk4str_cpy_s(buf, szbuf, pt, NULL)) {
	     if (0 != dk4str_cat_s(buf, szbuf, dk_send_kwnl[4], NULL)) {
	       if (0 != dk4str_cat_s(buf, szbuf, fn, NULL)) {
	         copied = 1;
		 dk_send_run_for_real_file_name(portname, buf);
	       }
	     }
	   }
	   if (0 == copied) {
	     /* ERROR: Path too long */
	     dk4app_log_base3(app, DK4_LL_ERROR, 98, 99, pt);
	   }
	} else {
	  dk_send_run_for_real_file_name(portname, fn);
	}
      } else {
        /* ERROR: Multiple matching files */
	dk4app_log_base3(app, DK4_LL_ERROR, 100, 106, filename);
      }
    } else {
      /* ERROR: No such file */
      dk4app_log_base3(app, DK4_LL_ERROR, 100, 107, filename);
    }
    dk4dir_close(fne);
  }
}

#endif



static
void
dk_send_normal_run()
{
  const	dkChar		*filename	= NULL;
  int			 xargc		= 0;
#if DK4_ON_WINDOWS
  int			 oldmode	= 0;
#endif
  xargc = dk4app_get_argc(app);
  switch (xargc) {
    case 1: {
#if DK4_ON_WINDOWS
      oldmode = _setmode(_fileno(stdin), _O_BINARY);
#endif
      dk_send_run_for_file(dk4app_get_argv(app, 0), stdin, dk_send_msg[2]);
#if DK4_ON_WINDOWS
      _setmode(_fileno(stdin), oldmode);
#endif
    } break;
    case 2: {
      filename = dk4app_get_argv(app, 1);
#if DK4_ON_WINDOWS
      if (dk4path_must_expand(filename)) {
        dk_send_expand_filename(dk4app_get_argv(app, 0), filename);
      } else {
#endif
        dk_send_run_for_real_file_name(dk4app_get_argv(app, 0), filename);
#if DK4_ON_WINDOWS
      }
#endif
    } break;
    default : {
      /* ERROR: Wrong number of command line arguments */
      dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 12);
    } break;
  }
}



#if	DK4_HAVE_SIGACTION
/**	Set signal handlers and run.
*/
static
void
dk_send_run_with_signal_handlers(void)
{
#ifdef SIGPIPE
  struct sigaction opipe;
#endif
  struct sigaction oint;
#ifdef SIGPIPE
  struct sigaction npipe;
#endif
  struct sigaction nint;
  struct sigaction oterm;
  struct sigaction nterm;
  int	 success = 0;

#ifdef SIGPIPE
  /*	Set up signal handling for SIGPIPE.
  */
  DK4_MEMRES(&npipe, sizeof(npipe));
  npipe.sa_handler = sig_handler_pipe;
  npipe.sa_flags = 0;
  if (0 != sigemptyset(&npipe.sa_mask)) {
    /* ERROR: Failed to set up masked signal set for SIGPIPE */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto finished;
  }
  if (0 != sigaddset(&npipe.sa_mask, SIGPIPE)) {
    /* ERROR: Failed to set up masked signal set for SIGPIPE */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto finished;
  }
  if (0 != sigaction(SIGPIPE, &npipe, &opipe)) {
    /* ERROR: Failed to set up signal handler for SIGPIPE */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto finished;
  }
#endif

  /*	Set up signal handling for SIGINT.
  */
  DK4_MEMRES(&nint, sizeof(nint));
  nint.sa_handler = sig_handler_int;
  nint.sa_flags = 0;
  if (0 != sigemptyset(&nint.sa_mask)) {
    /* ERROR: Failed to set up masked signal set for SIGINT */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto restore_old_pipe;
  }
  if (0 != sigaddset(&nint.sa_mask, SIGINT)) {
    /* ERROR: Failed to set up masked signal set for SIGINT */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto restore_old_pipe;
  }
  if (0 != sigaction(SIGINT, &nint, &oint)) {
    /* ERROR: Failed to set up signal handler for SIGINT */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto restore_old_pipe;
  }

  /*	Set up signal handling for SIGTERM
  */
  DK4_MEMRES(&nterm, sizeof(nterm));
  nterm.sa_handler = sig_handler_term;
  nterm.sa_flags = 0;
  if (0 != sigemptyset(&nterm.sa_mask)) {
    /* ERROR: Failed to set up masked signal set for SIGTERM */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto restore_old_int;
  }
  if (0 != sigaddset(&nterm.sa_mask, SIGTERM)) {
    /* ERROR: Failed to set up masked signal set for SIGTERM */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto restore_old_int;
  }
  if (0 != sigaction(SIGTERM, &nterm, &oterm)) {
    /* ERROR: Failed to set up signal handler for SIGTERM */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 0);
    goto restore_old_int;
  }

  success = 1;
  dk_send_normal_run();

  /*	Restore signal handling for SIGTERM.
  */
  if (0 != sigaction(SIGTERM, &oterm, NULL)) {
    /* ERROR: Failed to restore old SIGTERM settings */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 1);
    success = 0;
  }

  /*	Restore signal handling for SIGINT.
  */
  restore_old_int:
  if (0 != sigaction(SIGINT, &oint, NULL)) {
    /* ERROR: Failed to restore old SIGPIPE settings */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 1);
    success = 0;
  }

#ifdef SIGPIPE
  /*	Restore signal handling for SIGPIPE.
  */
  restore_old_pipe:
  if (0 != sigaction(SIGPIPE, &opipe, NULL)) {
    /* ERROR: Failed to restore old SIGPIPE settings */
    dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 1);
    success = 0;
  }
#endif

  /*	Set exit status code if error occured.
  */
  finished:
  if (0 == success) { exval = EXIT_FAILURE; }
}
#else
#if	DK4_HAVE_SIGSET
/**	Set signal handlers and run.
*/
static
void
dk_send_run_with_signal_handlers(void)
{
#ifdef SIGPIPE
  dk4_sig_handler_t	*oldpipe = NULL;
#endif
  dk4_sig_handler_t	*oldint  = NULL;
  dk4_sig_handler_t	*oldterm = NULL;

#ifdef SIGPIPE
  oldpipe = sigset(SIGPIPE, sig_handler_pipe);
#endif
  oldint  = sigset(SIGINT,  sig_handler_int);
  oldterm = sigset(SIGTERM, sig_handler_term);
  dk_send_normal_run();
  sigset(SIGTERM, oldterm);
  sigset(SIGINT,  oldint);
#ifdef SIGPIPE
  sigset(SIGPIPE, oldpipe);
#endif
}
#else
#if	DK4_HAVE_SIGNAL
/**	Set signal handlers and run.
*/
static
void
dk_send_run_with_signal_handlers(void)
{
#ifdef SIGPIPE
  dk4_sig_handler_t	*oldpipe = NULL;
#endif
  dk4_sig_handler_t	*oldint  = NULL;
  dk4_sig_handler_t	*oldterm = NULL;

#ifdef SIGPIPE
  oldpipe = signal(SIGPIPE, sig_handler_pipe);
#endif
  oldint  = signal(SIGINT,  sig_handler_int);
  oldterm = signal(SIGTERM, sig_handler_term);
  dk_send_normal_run();
  signal(SIGTERM, oldterm);
  signal(SIGINT,  oldint);
#ifdef SIGPIPE
  signal(SIGPIPE, oldpipe);
#endif
}
#else
/**	Set signal handlers and run.
*/
static
void
dk_send_run_with_signal_handlers(void)
{
  dk_send_normal_run();
}
#endif
#endif
#endif



/**	Main function.
	@param	argc	Number of command line arguments.
	@param	argv	Command line arguments array.
	@return	0 on success, all other values indicate errors.
*/
#if DK4_CHAR_SIZE > 1
int wmain(int argc, wchar_t *argv[])
#else
int main(int argc, char *argv[])
#endif
{
  $!trace-init dk-send.deb
  $? "+ main"
  app = dk4app_open_cmd(
    argc, argv, dk_send_options, dk_send_sz_options,
    dk_send_kwnl[0], DKT_VERSION_DK,
    dk_send_kwnl[1], dk_send_help_text, dk_send_license_text
  );
  if (NULL != app) {
    dk_send_sz_msg = dk4app_string_table_size(dk_send_kw_def);
    dk_send_msg    = dk4app_string_table(app, dk_send_kwnl[2], dk_send_kw_def);
    if (0 != dk4app_can_run_normally(app)) {
      dk_send_run_with_signal_handlers();
    } else {
      if (0 != dk4app_help_version_license(app)) {
        exval = EXIT_SUCCESS;
      }
    }
    if (0 != sig_read_atomic(&sig_had_int)) {
      /* ERROR: INT signal */
      dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 13);
      exval = EXIT_FAILURE;
    }
    if (0 != sig_read_atomic(&sig_had_term)) {
      /* ERROR: TERM signal */
      dk4app_log_1(app, dk_send_msg, dk_send_sz_msg, DK4_LL_ERROR, 14);
      exval = EXIT_FAILURE;
    }
#ifdef SIGPIPE
    if (0 != sig_read_atomic(&sig_had_pipe)) {
      exval = EXIT_FAILURE;
    }
#endif
    dk4app_close(app);
  }
  $? "- main %d", exval
  $!trace-end
  exit(exval);
  return exval;
}