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21 lines
575 B
C++
21 lines
575 B
C++
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//
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// isatty.cpp
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// Defines _isatty(), which tests whether a file refers to a character device.
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//
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#include <corecrt_internal_lowio.h>
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// Tests if the given file refers to a character device (e.g. terminal, console,
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// printer, serial port, etc.). Returns nonzero if so; zero if not.
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extern "C" int __cdecl _isatty(int const fh)
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{
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_CHECK_FH_RETURN(fh, EBADF, 0);
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_VALIDATE_RETURN((fh >= 0 && (unsigned)fh < (unsigned)_nhandle), EBADF, 0);
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return static_cast<int>(_osfile(fh) & FDEV);
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}
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