#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <limits.h>

int	debug = 0;
#define DEBUG(x)	if (debug)	fprintf x ;

static inline pid_t
Fork(void) {
  pid_t		pid;
  if ((pid=fork()) < 0) { perror("Fork: "); exit(1); }
  return pid;
}

static inline int
Execl(const char *path, const char *arg0, ...) {
  int		rc;
  if ((rc=execl(path,arg0,0)) < 0) { perror("Execl: "); exit(1); }
  return rc;
}

static inline int
Execvp(const char *path, char * const argv[]) {
  int		rc;
  if ((rc=execvp(path,argv)) < 0) { perror("Execvp: "); exit(1); }
  return rc;
}

static inline pid_t
Wait(int *status) {
  pid_t		pid;
  if ((pid=wait(status)) < 0) { perror("Wait: "); exit(1); }
  return pid;
}

static inline pid_t
Waitpid(pid_t pid, int *status, int options) {
  pid_t		ret;
  if ((ret=waitpid(pid,status,options)) < 0) { perror("Waitpid: "); exit(1); }
  return ret;
}

static inline int
Read(int fd, char *buf, size_t n) {
  int	rc = read(fd, buf, n);
  if (rc < 0)	{
    DEBUG( (stderr, "pid %d, Read: n = %d, but rc = %d\b",
    						getpid(), n, rc) );
    exit(1);
  }
  return rc;
}

static inline int
Write(int fd, char *buf, size_t n) {
  int	rc = write(fd, buf, n);
  if (rc < 0)	{
    DEBUG( (stderr, "pid %d, Read: n = %d, but rc = %d\b",
    						getpid(), n, rc) );
    exit(1);
  }
  return rc;
}

static inline int
Pipe(int fd[]) {
  int	rc = pipe(fd);
  if (rc < 0)	{
    perror("Pipe: ");
    exit(1);
  }
  return rc;
}

static inline int
Dup2(int oldfd, int newfd) {
  int	rc = dup2(oldfd, newfd);
  if (rc < 0)	{
    perror("Dup2: ");
    exit(1);
  }
  return rc;
}