libgloss/riscv/semihost-sys_isatty.c

   1 /*
   2  * Copyright (C) 2020 Embecosm Limited
   3  * SPDX-License-Identifier: BSD-2-Clause
   4  */
   5 #include <machine/syscall.h>
   6 #include <sys/stat.h>
   7 #include "semihost_syscall.h"
   8 #include "semihost_fdtable.h"
   9
  10 int
  11 _isatty (int file)
  12 {
  13   struct fdentry *fd =__get_fdentry (file);
  14   long data_block[1];
  15
  16   if (fd == NULL)
  17     return -1;
  18
  19   data_block[0] = fd->handle;
  20   return syscall_errno (SEMIHOST_istty, data_block);
  21 }