path: root/support/dktools/dk-blks.c

/*
	WARNING: This file was generated by dkct.
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk-blks.ctr
*/

/*
Copyright (C) 2015-2017, Dirk Krause

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 opyright 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 author 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.
*/


#line 10 "dk-blks.ctr"

/**	@file	dk-blks.c	The dk-blks program.
	the help_text array below shows details.
*/



#include "dk4conf.h"

#include <stdio.h>
#if DK4_HAVE_STDLIB_H
#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#define	STDLIB_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_UNISTD_H
#ifndef UNISTD_H_INCLUDED
#include <unistd.h>
#define	UNISTD_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_PROCESS_H
#ifndef PROCESS_H_INCLUDED
#include <process.h>
#define	PROCESS_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_SYS_TYPES_H
#ifndef SYS_TYPES_H_INCLUDED
#include <sys/types.h>
#define SYS_TYPES_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_SIGNAL_H
#ifndef SIGNAL_H_INCLUDED
#include <signal.h>
#define SIGNAL_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_ERRNO_H
#ifndef ERRNO_H_INCLUDED
#include <errno.h>
#define	ERRNO_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 "dk4types.h"
#include "dk4const.h"
#include "dk4vers.h"
#include "dk4app.h"
#include "dk4aopt.h"
#include "dk4mem.h"
#include "dk4mema.h"
#include "dk4memrs.h"
#include "dk4numco.h"
#include "dk4fdrde.h"
#include "dk4fdwre.h"





#line 98 "dk-blks.ctr"



#ifndef DK_BLKS_DEFAULT_BLOCK_SIZE
/**	Default suitable for hard disks.
*/
#define	DK_BLKS_DEFAULT_BLOCK_SIZE	4096
#endif



/**	Default help text, shown if help text file is not found.
*/
static const dkChar * const	help_text[] = {
dkT(""),
dkT("Create sequence of fixed size blocks."),
dkT(""),
dkT("dk-blks [<options>]"),
dkT(""),
dkT("Options:"),
dkT("-b <size>\tBlock size, positive integer number."),
dkT("\t\tYou can append `k', `m', `g', or `t' for multiples of 1024"),
dkT("\t\tor powers of it (i.e. 4k = 4096 bytes, 1m = 1048576 bytes...)."),
dkT(""),
dkT("--help\t\tShow this short help text."),
dkT("--manual\t*** SHOW FULL MANUAL. ***"),
dkT("--version\tShow version information."),
dkT("--license\tShow license information."),
dkT(""),
dkT("http://dktools.sourceforge.net"),
dkT(""),
NULL


#line 131 "dk-blks.ctr"
};


/**	License conditions.
*/
static const dkChar * const	license_text[] = {
dkT("This software uses code from the following projects, either directly or as"),
dkT("a library:"),
dkT(""),
dkT("dktools\t\tDirk Krause's tools and libraries."),
dkT("\t\tSee http://dktools.sourceforge.net/ for more information."),
#if DK4_HAVE_ZLIB_H
dkT(""),
dkT("zlib\t\tData compression library."),
dkT("\t\tSee http://www.zlib.net/ for more information."),
#endif
#if DK4_HAVE_BZLIB_H
dkT(""),
dkT("bzip2\t\tData compression program and library."),
dkT("\t\tSee http://www.bzip.org/ for more information."),
#endif
dkT(""),
dkT("All the licenses below apply to the program."),
dkT("Licenses for used libraries are shown as found on my Scientific Linux 6.x"),
dkT("computer in the /usr/share/doc directory on 2015-04-01. Check the project"),
dkT("homepages of the used libraries for additional information and/or updated"),
dkT("license terms."),
dkT(""),
dkT(""),
dkT("DK tools and libraries license"),
dkT("=============================="),
dkT("Copyright (c) 2015-2016, Dirk Krause"),
dkT("All rights reserved."),
dkT(""),
dkT("Redistribution and use in source and binary forms, with or without"),
dkT("modification, are permitted provided that the following conditions are met:"),
dkT(""),
dkT("* Redistributions of source code must retain the above copyright notice,"),
dkT("  this list of conditions and the following disclaimer."),
dkT("* Redistributions in binary form must reproduce the above copyright"),
dkT("  notice, this list of conditions and the following disclaimer in the"),
dkT("  documentation and/or other materials provided with the distribution."),
dkT("* Neither the name of the Dirk Krause nor the names of contributors may be"),
dkT("  used to endorse or promote products derived from this software without"),
dkT("  specific prior written permission."),
dkT(""),
dkT("THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\""),
dkT("AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE"),
dkT("IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE"),
dkT("ARE DISCLAIMED."),
dkT(""),
dkT("IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,"),
dkT("INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,"),
dkT("BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,"),
dkT("DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY"),
dkT("OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING"),
dkT("NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,"),
dkT("EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."),
#if DK4_HAVE_ZLIB_H
dkT(""),
dkT(""),
dkT("Zlib license"),
dkT("============"),
dkT("(C) 1995-2004 Jean-loup Gailly and Mark Adler"),
dkT(""),
dkT("This software is provided 'as-is', without any express or implied"),
dkT("warranty.  In no event will the authors be held liable for any damages"),
dkT("arising from the use of this software."),
dkT(""),
dkT("Permission is granted to anyone to use this software for any purpose,"),
dkT("including commercial applications, and to alter it and redistribute it"),
dkT("freely, subject to the following restrictions:"),
dkT(""),
dkT("1. The origin of this software must not be misrepresented; you must not"),
dkT("   claim that you wrote the original software. If you use this software"),
dkT("   in a product, an acknowledgment in the product documentation would be"),
dkT("   appreciated but is not required."),
dkT("2. Altered source versions must be plainly marked as such, and must not be"),
dkT("   misrepresented as being the original software."),
dkT("3. This notice may not be removed or altered from any source distribution."),
dkT(""),
dkT("Jean-loup Gailly        Mark Adler"),
dkT("jloup@gzip.org          madler@alumni.caltech.edu"),
#endif
#if DK4_HAVE_BZLIB_H
dkT(""),
dkT(""),
dkT("Bzip2 and libbzip2 library license"),
dkT("=================================="),
dkT("This program, \"bzip2\", the associated library \"libbzip2\", and all"),
dkT("documentation, are copyright (C) 1996-2007 Julian R Seward.  All"),
dkT("rights reserved."),
dkT(""),
dkT("Redistribution and use in source and binary forms, with or without"),
dkT("modification, are permitted provided that the following conditions"),
dkT("are met:"),
dkT(""),
dkT("1. Redistributions of source code must retain the above copyright"),
dkT("   notice, this list of conditions and the following disclaimer."),
dkT(""),
dkT("2. The origin of this software must not be misrepresented; you must "),
dkT("   not claim that you wrote the original software.  If you use this "),
dkT("   software in a product, an acknowledgment in the product "),
dkT("   documentation would be appreciated but is not required."),
dkT(""),
dkT("3. Altered source versions must be plainly marked as such, and must"),
dkT("   not be misrepresented as being the original software."),
dkT(""),
dkT("4. The name of the author may not be used to endorse or promote "),
dkT("   products derived from this software without specific prior written "),
dkT("   permission."),
dkT(""),
dkT("THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS"),
dkT("OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED"),
dkT("WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE"),
dkT("ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY"),
dkT("DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL"),
dkT("DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE"),
dkT("GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS"),
dkT("INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,"),
dkT("WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING"),
dkT("NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS"),
dkT("SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."),
dkT(""),
dkT("Julian Seward, jseward@bzip.org"),
dkT("bzip2/libbzip2 version 1.0.5 of 10 December 2007"),
#endif
dkT(""),
NULL


#line 261 "dk-blks.ctr"
};



/**	Options used by program.
*/
static const dk4_option_specification_t options[] = {
  { dkT('b'), dkT("block-size"), DK4_OPT_ARG_SIZE }
};

/**	Number of elements in options array.
*/
static const size_t sz_options =
sizeof(options)/sizeof(dk4_option_specification_t);



/**	Keywords used by the program, not localized.
*/
static const dkChar * const	kwnl[] = {
/* 0 */
dkT("dktools"),

/* 1 */
dkT("dk-blks.txt"),

/* 2 */
dkT("dk-blks.str"),

/* 3 */
dkT("stdin"),

/* 4 */
dkT("stdout"),

NULL


#line 300 "dk-blks.ctr"
};



/**	Constant texts used by the program, replaced by localized texts
	if available.
*/
static const dkChar * const	kw_def[] = {
/* 0 */
dkT("Write operation partially failed!"),

/* 1 */
dkT("Failed to cleanup buffer!"),

/* 2 */
dkT("Block size too large!"),

/* 3 */
dkT("Block size must not be 0!"),

/* 4 */
dkT("Failed to set up signal handlers!"),

/* 5 */
dkT("Failed to restore signal handlers!"),

/* 6 */
dkT("Signal SIGPIPE received, write operation failed!"),

/* 7 */
dkT("Signal SIGINT received, program aborted!"),

/* 8 */
dkT("Unexpected command line argument \""),

/* 9 */
dkT("\" ignored!"),

NULL


#line 347 "dk-blks.ctr"
};



/**	Message texts, localized texts are used if available.
*/
static const dkChar * const	*dk_blks_msg	= kw_def;



/**	Number of elements in dk_blks_msg array.
*/
static size_t	sz_msg =
sizeof(kw_def)/sizeof(DK4_PCDKCHAR) - 1;



/**	Exit status code.
*/
static int	exval = EXIT_FAILURE;



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



/**	Input buffer for buffer sizes up to DK_BLKS_DEFAULT_BLOCK_SIZE.
*/
static char default_input_buffer[DK_BLKS_DEFAULT_BLOCK_SIZE];



/**	Output buffer for buffer sizes up to DK_BLKS_DEFAULT_BLOCK_SIZE.
*/
static char default_output_buffer[sizeof(default_input_buffer)];



#ifdef RW_MAX
#undef RW_MAX
#endif

#if DK4_ON_WINDOWS
/**	Maximum number of bytes for read or write operation.
*/
#define	RW_MAX	(INT_MAX)
#else
/**	Maximum number of bytes for read or write operation.
*/
#define	RW_MAX	((SIZE_MAX) / 2U)
#endif



#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;

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;
}



static
void
dk_blks_transfer(char *ib, char *ob, size_t bs)
{
  int			cc	= 1;	/* Flag: Can continue */
  size_t		irdb	= 0;	/* Bytes in input buffer */
  size_t		iused	= 0;	/* Input bytes used */
  size_t		oused	= 0;	/* Output bytes used */
  size_t		iavail;		/* Input bytes available */
  size_t		oavail;		/* Output bytes available */
  size_t		bcp;		/* Bytes to copy */
#if DK4_ON_WINDOWS
  int			rdres;		/* Number of bytes read */
  int			wrres;		/* Number of bytes written */
#else
  ssize_t		rdres;		/* Number of bytes read */
  ssize_t		wrres;		/* Number of bytes written */
#endif
  dk4_sig_atomic_t	shp;		/* Had pipe */
  

#line 519 "dk-blks.ctr"
  /*	Process input
  */
  exval = EXIT_SUCCESS;
  do {
    if (1 == sig_can_continue(0)) {
      errno = 0;				

#line 525 "dk-blks.ctr"
#if DK4_ON_WINDOWS
      rdres = _read(0, ib, (unsigned)bs);
#else
      rdres = read(0, ib, bs);
#endif
      if (0 < rdres) {			

#line 531 "dk-blks.ctr"
        irdb = rdres;
        iused = 0;
        while(iused < irdb) {
          /* Find number of bytes we can add to output buffer */
          iavail = irdb - iused;
	  oavail = bs - oused;
	  if (iavail < oavail) {
	    bcp = iavail;
	  } else {
	    bcp = oavail;
	  }
	  /* Add bytes to output buffer */
	  DK4_MEMCPY(&(ob[oused]), &(ib[iused]), bcp);
	  /* Increased number of used bytes for both input and output */
	  oused += bcp;
	  iused += bcp;
	  /* Flush output buffer when full */
	  if (oused >= bs) {
#ifdef SIGPIPE
	    shp = sig_read_atomic(&sig_had_pipe);
#else
	    shp = 0;
#endif
	    if (0 == shp) {
	      errno = 0;
#if DK4_ON_WINDOWS
	      wrres = _write(1, ob, (unsigned)bs);
#else
	      wrres = write(1, ob, bs);
#endif
	      if (0 <= wrres) {
	        if (wrres < bs) {
	          /* ERROR: Not all bytes written */
	          dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 0);
	          exval = EXIT_FAILURE;
	          cc = -1;
	        }
	      } else {
	        /* ERROR Write attempt failed */
	        dk4fd_write_error_msg(app, kwnl[4], errno);
	        exval = EXIT_FAILURE;
	        cc = -1;
	      }
	    }
	    oused = 0;
	  }
        }
      } else {
        if (0 == rdres) {			

#line 580 "dk-blks.ctr"
          cc = 0;
        } else {				

#line 582 "dk-blks.ctr"
          /* ERROR: Read operation failed */
	  dk4fd_read_error_msg(app, kwnl[3], errno);
	  cc = 0;
	  exval = EXIT_FAILURE;
        }
      }
#if DK4_ON_WINDOWS
      if (_eof(0)) {
        cc = 0;
      }
#endif
    } else {
      cc = -1;
    }
  } while (1 == cc);

  /*	Flush output buffer */
  if (0 == cc) {
    if (0 < oused) {
#ifdef SIGPIPE
      shp = sig_read_atomic(&sig_had_pipe);
#else
      shp = 0;
#endif
      if (0 == shp) {
        errno = 0;
#if DK4_ON_WINDOWS
        wrres = _write(1, ob, (unsigned)oused);
#else
        wrres = write(1, ob, oused);
#endif
        if (0 <= wrres) {
          if (wrres < oused) {
	    /* ERROR: Not all bytes written */
	    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 0);
	    exval = EXIT_FAILURE;
	  }
        } else {
          /* ERROR: Write attempt failed */
	  dk4fd_write_error_msg(app, kwnl[4], errno);
	  exval = EXIT_FAILURE;
        }
      }
    }
  }

  /*	Finally zero-fill used buffers.
  */
  if (0 == dk4mem_reset_secure(ib, bs, NULL)) {
    /* ERROR: Secure memory reset failed */
    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 1);
    exval = EXIT_FAILURE;
  }
  if (0 == dk4mem_reset_secure(ob, bs, NULL)) {
    /* ERROR: Secure memory reset failed */
    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 1);
    exval = EXIT_FAILURE;
  }

  

#line 642 "dk-blks.ctr"
}



static
void
dk_blks_with_buffers(char *ib, char *ob, size_t bs)
{
#if DK4_ON_WINDOWS
  int oldinmode = 0;
  int oldoutmode = 0;
#endif
  if ((dk4_um_t)RW_MAX >= (dk4_um_t)bs) {
#if DK4_ON_WINDOWS
    oldinmode  = _setmode(0, _O_BINARY);
    oldoutmode = _setmode(1, _O_BINARY);
#endif
    dk_blks_transfer(ib, ob, bs);
#if DK4_ON_WINDOWS
    _setmode(1, oldoutmode);
    _setmode(0, oldinmode);
#endif
  } else {
    /* ERROR: Block size too large */
    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 2);
  }
}



/**	Run normally.
*/
static
void
dk_blks_normal_run(void)
{
  char		*myib;
  char		*myob;
  size_t	 mybs	= DK_BLKS_DEFAULT_BLOCK_SIZE;
  int		 res	= 0;
  

#line 683 "dk-blks.ctr"
  if (0 != dk4app_opt_is_set_short(app, dkT('b'), NULL)) {
    res = dk4app_opt_get_size_short(&mybs, app, dkT('b'), NULL);
    if (0 == res) {
      mybs = DK_BLKS_DEFAULT_BLOCK_SIZE;
    }
  }
  if ((0 < mybs) && (mybs <= DK_BLKS_DEFAULT_BLOCK_SIZE)) {
    dk_blks_with_buffers(
      default_input_buffer,
      default_output_buffer,
      mybs
    );
  } else {
    if (0 < mybs) {
      myib = (char *)dk4mem_calloc_app(1, mybs, app);
      if (NULL != myib) {
        myob = (char *)dk4mem_calloc_app(1, mybs, app);
        if (NULL != myob) {
          dk_blks_with_buffers(myib, myob, mybs);
          dk4mem_free(myob);
        }
        dk4mem_free(myib);
      }
    } else {
      /* ERROR: Illegal block size */
      dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 3);
    }
  }
  

#line 712 "dk-blks.ctr"
}



#if	DK4_HAVE_SIGACTION
/**	Set signal handlers and run.
*/
static
void
run_with_signals(void)
{
#ifdef SIGPIPE
  struct sigaction opipe;
#endif
  struct sigaction oint;
  struct sigaction oterm;
#ifdef SIGPIPE
  struct sigaction npipe;
#endif
  struct sigaction nint;
  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_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    goto finished;
  }
  if (0 != sigaddset(&npipe.sa_mask, SIGPIPE)) {
    /* ERROR: Failed to set up masked signal set for SIGPIPE */
    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    goto finished;
  }
  if (0 != sigaction(SIGPIPE, &npipe, &opipe)) {
    /* ERROR: Failed to set up signal handler for SIGPIPE */
    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    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_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    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_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    goto restore_old_pipe;
  }
  if (0 != sigaction(SIGINT, &nint, &oint)) {
    /* ERROR: Failed to set up signal handler for SIGINT */
    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    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_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    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_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    goto restore_old_int;
  }
  if (0 != sigaction(SIGTERM, &nterm, &oterm)) {
    /* ERROR: Failed to set up signal handler for SIGTERM */
    dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 4);
    goto restore_old_int;
  }

  success = 1;
  dk_blks_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_blks_msg, sz_msg, DK4_LL_ERROR, 5);
    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_blks_msg, sz_msg, DK4_LL_ERROR, 5);
    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_blks_msg, sz_msg, DK4_LL_ERROR, 5);
    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
run_with_signals(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_blks_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
run_with_signals(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_blks_normal_run();
  signal(SIGTERM, oldterm);
  signal(SIGINT,  oldint);
#ifdef SIGPIPE
  signal(SIGPIPE, oldpipe);
#endif
}
#else
/**	Set signal handlers and run.
*/
static
void
run_with_signals(void)
{
  dk_blks_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
{
  dkChar const	*xargv;
  int		 xargc;
  int		 i;
  

#line 917 "dk-blks.ctr"
  

#line 918 "dk-blks.ctr"
  app = dk4app_open_cmd(
    argc, argv, options, sz_options, kwnl[0], DKT_VERSION_DK,
    kwnl[1], help_text, license_text
  );
  if (NULL != app) {
    sz_msg =	  dk4app_string_table_size(kw_def);
    dk_blks_msg = dk4app_string_table(app, kwnl[2], kw_def);
    if (0 != dk4app_can_run_normally(app)) {
      run_with_signals();
      xargc = dk4app_get_argc(app);
      if (0 < xargc) {
        for (i = 0; i < xargc; i++) {
	  xargv = dk4app_get_argv(app, i);
	  if (NULL != xargv) {
	    dk4app_log_3(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 8, 9, xargv);
	    exval = EXIT_FAILURE;
	  }
	}
      }
#ifdef SIGPIPE
      if (0 != sig_read_atomic(&sig_had_pipe)) {
	dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 6);
	exval = EXIT_FAILURE;
      }
#endif
      if (0 != sig_read_atomic(&sig_had_int)) {
        dk4app_log_1(app, dk_blks_msg, sz_msg, DK4_LL_ERROR, 7);
	exval = EXIT_FAILURE;
      }
    } else {
      if (0 != dk4app_help_version_license(app)) {
        exval = EXIT_SUCCESS;
      }
    }
    dk4app_close(app); app = NULL;
  } else {
  }
  

#line 956 "dk-blks.ctr"
  

#line 957 "dk-blks.ctr"
  exit(exval); return exval;
}