#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
static char buf[1];
int main(int argc, char *argv[])
{
int fd;
int ret;
if (argc < 2)
exit(1);
fd = open(argv[1], 0);
if (fd < 0)
exit(1);
ret = read(fd, (size_t)-1, buf);
printf("ret: %d %d\n", ret, errno);
close(fd);
return 0;
}