Code:
# include < stdlib.h>
# include <  stdio.h>

# include <  unistd.h>
int main()
{
	long LgVal;
	
	if((LgVal = sysconf(_SC_ARG_MAX)) < 0)
	{
		perror(" LgVal ERROR");
	}
	else 
	{
		printf(" LgVal IS %ld ",LgVal);
	}
	
	if((LgVal = sysconf(_SC_CHILD_MAX)) < 0)
	{
		perror("   LgVal ERROR ");
	}
	else
	{
		printf("MAXIMUM CHILD PROCESS %ld ",LgVal);
	}
	printf("");
	return(0);
}