mirror of https://github.com/sipwise/heartbeat.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
112 lines
2.6 KiB
112 lines
2.6 KiB
|
|
/* Linux-HA: pid test code
|
|
*
|
|
* Author: Jia Ming Pan <jmltc@cn.ibm.com>
|
|
* Modified by Guochun Shi <gshi@ncsa.uiuc.edu>
|
|
*
|
|
* Copyright (c) 2005 International Business Machines
|
|
*
|
|
* 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 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.
|
|
*
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <stdlib.h>
|
|
|
|
#define SAME 1
|
|
#define TRUE 1
|
|
#define FALSE 0
|
|
int childflag = 0;
|
|
int grandchildflag = 0;
|
|
int pidconsistent = TRUE;
|
|
void *
|
|
grandchild_func(void * data)
|
|
{
|
|
pid_t pid = (long) data;
|
|
|
|
if (pid == getpid()){
|
|
grandchildflag = SAME;
|
|
}
|
|
|
|
if (grandchildflag ^ childflag){
|
|
pidconsistent = FALSE;
|
|
printf("Inconsistency detected\n");
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void *
|
|
child_func(void * data)
|
|
{
|
|
pid_t pid = (long) data;
|
|
pthread_t thread_id;
|
|
|
|
if (pid == getpid()){
|
|
childflag = SAME;
|
|
}
|
|
|
|
pthread_create(&thread_id, NULL, grandchild_func, (void*)(long)getpid());
|
|
|
|
}
|
|
|
|
int
|
|
main()
|
|
{
|
|
pthread_t thread_id;
|
|
pthread_attr_t tattr;
|
|
int firsttime = 1;
|
|
pid_t pid;
|
|
int status;
|
|
|
|
pthread_attr_init(&tattr);
|
|
pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED);
|
|
|
|
again:
|
|
pid = fork();
|
|
if ( pid == 0 ) {
|
|
childflag = 0;
|
|
grandchildflag =0;
|
|
if (pthread_create(&thread_id, &tattr, child_func, (void*)(long)getpid()) != 0){
|
|
printf("%s: creating thread failed", __FUNCTION__);
|
|
}
|
|
usleep(500000);
|
|
if (firsttime){
|
|
firsttime=0;
|
|
goto again;
|
|
}
|
|
if (pidconsistent){
|
|
return 0;
|
|
}else{
|
|
return 1;
|
|
}
|
|
}
|
|
if (waitpid(pid, &status, 0) <= 0){
|
|
printf("ERROR: wait for child %d failed\n",pid);
|
|
}
|
|
if (WIFEXITED(status)){
|
|
return (WEXITSTATUS(status));
|
|
}else{
|
|
printf("child process %d does not exit normally\n",pid);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|