#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include "syscall.h"
#include "libc.h"

void __procfdname(char*, unsigned);

int fstat(int fd, struct stat* st) {
  int ret = __syscall(SYS_fstat, fd, st);
  if (ret != -EBADF || __syscall(SYS_fcntl, fd, F_GETFD) < 0)
    return __syscall_ret(ret);

  char buf[15 + 3 * sizeof(int)];
  __procfdname(buf, fd);
#ifdef SYS_stat
  return syscall(SYS_stat, buf, st);
#else
  return syscall(SYS_fstatat, AT_FDCWD, buf, st, 0);
#endif
}