7639ba6906
The isatty function uses the side effects of an ioctl call to determine if a specific file descriptor is a terminal. I chose TIOCGETD (get line discipline of terminal) because it didn't require any new structs. Reviewed By: sivachandra, lntue Differential Revision: https://reviews.llvm.org/D135618
20 lines
885 B
C
20 lines
885 B
C
//===-- Definition of macros from sys/ioctl.h -----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef __LLVM_LIBC_MACROS_LINUX_SYS_IOCTL_MACROS_H
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#define __LLVM_LIBC_MACROS_LINUX_SYS_IOCTL_MACROS_H
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// TODO (michaelrj): Finish defining these macros.
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// Just defining this macro for the moment since it's all that we need right
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// now. The other macros are mostly just constants, but there's some complexity
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// around the definitions of macros like _IO, _IOR, _IOW, and _IOWR that I don't
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// think is worth digging into right now.
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#define TIOCGETD 0x5424
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#endif // __LLVM_LIBC_MACROS_LINUX_SYS_IOCTL_MACROS_H
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