/* * sendtoxlog - example for retrieving data from xlog * Copyright (C) 2002 -2004 Joop Stakenborg * * 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 #include #include #include #include #include #include #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); }