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/*
* sendtoxlog - example for retrieving data from xlog
* Copyright (C) 2002 -2005 Joop Stakenborg <pg4i@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);
}
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