UNIX for Advanced & Expert Users

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <semaphore.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>

#define FILE_MODE S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH
int main(int argc,char **argv)
{
	int c,flags,fd;
	sem_t *sem;
	
	int val;
	if (argc!=2)
		fprintf(stderr,"usage:semwait<name>");
	
	fprintf(stderr,"usage:createSem [-e][-i initalvalue ]<name>");
	//sem=sem_open(argv[1],0);
	sem_open(argv[1],0);
	sem_post(sem);
	sem_wait(sem);
	
	pause();
	exit(0);
}