#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

//#define debug

int main(int argc, char **argv)
{
	register unsigned int i;
   int      status,
				childProc;
   unsigned int unSuccProc=0;
			
	if (argc != 5)
	{
		printf("SYNTAX: %s #parallelProcesses #ignoredLockingFailures waitSecondsBeforeLockingAgain incrementRepreat\n",argv[0]);
 		exit(1);
	}//if

	for (i=0; i<atoi(argv[1]); i++)
	{
		#ifdef debug
		printf("creating process no %d with parameters %s, %s, %s\n",i+1,argv[2], argv[3], argv[4]);
		#endif
		
		
		switch(fork())
		{
			case -1:
				perror("fork");
				exit(1);
			case 0:
				//child process
				if (execl("lockingWriter", "lockingWriter", argv[2], argv[3], argv[4], (char *) 0) == -1)
					perror("exec");
				break;
		}//switch
	}//for

	for (i=0; i<atoi(argv[1]); i++)
	{
	   childProc = wait(&status);
		if (status !=0)
			unSuccProc++;
	}//for

	printf("%d processes of %s terminated preliminary\n",unSuccProc, argv[1]);
		
	exit(0);
}//main()