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#include <fcnt1.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc,char *argv[])
{
  int fd_open,fd_open_create,fd_create;
  if((fd_open=open("/home/wang/test/hello.c",O_RDONLY))==-1)
    {
      perror("open");
      exit(EXIT_FAILURE);
    }
  printf("the file's descriptor is:%d\n",fd_open);

  if((fd_open_create==open("./tmp1",O_CREAT|O_EXCL,0644))==-1)
    {
      perrno("open");
      exit(EXIT_FAILURE);
    }
  printf("the tmp1 file descriptor is:%d\n",fd_open_create);

  if((fd_create=creat("./tem2",0644))==-1)
    {
      perrno("create");
      exit(EXIT_FAILURE);
    }
  printf("the tmp2 file descriptor is:%d\n",fd_create);

  close(fd_open);
  close(fd_create);
  close(fd_open_create);

  return 0;
}
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wangjun@my-desktop:~/test$ gcc -ggdb3 -o open_example open_example.c
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open_example.c:8: