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# /* This is file ISATTY.S */

# /*

# ** Copyright (C) 1991 DJ Delorie

# **

# ** This file is distributed under the terms listed in the document

# ** "copying.dj".

# ** A copy of "copying.dj" should accompany this file; if not, a copy

# ** should be available from where this file was obtained.  This file

# ** may not be distributed without a verbatim copy of "copying.dj".

# **

# ** This file is distributed WITHOUT ANY WARRANTY; without even the implied

# ** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# */

        .text

        .globl _isatty

_isatty:

        pushl   %ebx

        pushl   %esi

        pushl   %edi

        movl    16(%esp),%ebx

        movw    $0x4400,%ax

        int     $0x21

        popl    %edi

        popl    %esi

        popl    %ebx

        movl    $0,%eax

        jb      tf

        testl   $0x80,%edx

        jz      tf

        movl    $1,%eax

tf:

        ret