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

void __procfdname(char*, unsigned);

int fchmod(int fd, mode_t mode) {
  int ret = __syscall(SYS_fchmod, fd, mode);
  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_chmod
  return syscall(SYS_chmod, buf, mode);
#else
  return syscall(SYS_fchmodat, AT_FDCWD, buf, mode);
#endif
}