/*
 * sendtoxlog - example for retrieving data from xlog
 * Copyright (C) 2002 -2003 Joop Stakenborg <pa4tu@amsat.org>
 *
 * 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 Library 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.
 */

/*
 *
 * Compile with 'gcc -o fromxlog fromxlog.c'
 * See the provided README for more details.
 *
 */


#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <string.h>

#define KEY 6146		/* unique key */
#define SHMSIZE  40		/* size of shared memory */

int
main (void)
{
  int shmid = -1;
  void *pt;

  for (;;)
    {				/* allocate a shared memory segment */
      if ((shmid = shmget ((key_t) KEY, SHMSIZE, 0600)) < 0)
	{
	  fprintf (stderr, "No logging program...\n");
	  shmid = -1;
	}
      if (shmid != -1)
	{			/* attach  the  shared memory segment */
	  if ((pt = (shmat (shmid, NULL, 0))) == (void *) -1)
	    {
	      perror ("fromlog - shmat");
	      exit (1);
	    }
	  fprintf (stdout, "%s\n", (char *) pt);
	  shmdt ((void *) pt);	/* detach  the  shared  memory  segment */
	}
      sleep (1);
    }
  exit (0);
}
