| 1 | //===-- Definition of kernel's version of struct termios --------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLVM_LIBC_SRC_TERMIOS_LINUX_KERNEL_TERMIOS_H |
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| 10 | #define LLVM_LIBC_SRC_TERMIOS_LINUX_KERNEL_TERMIOS_H |
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| 11 | |
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| 12 | #include <stddef.h> |
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| 13 | #include <termios.h> |
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| 14 | |
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| 15 | namespace LIBC_NAMESPACE { |
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| 16 | |
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| 17 | // The kernel's struct termios is different from the libc's struct termios. The |
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| 18 | // kernel's syscalls expect the size and layout of its definition of struct |
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| 19 | // termios. So, we define a flavor of struct termios which matches that of the |
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| 20 | // kernel so that we can translate between the libc version and the kernel |
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| 21 | // version when passing struct termios objects to syscalls. |
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| 22 | |
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| 23 | // NOTE: The definitions here are generic definitions valid for most target |
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| 24 | // architectures including x86_64 and aarch64. Definitions on some architectures |
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| 25 | // deviate from these generic definitions. Adjustments have to be made for those |
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| 26 | // architectures. |
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| 27 | |
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| 28 | constexpr size_t KERNEL_NCCS = 19; |
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| 29 | |
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| 30 | struct kernel_termios { |
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| 31 | tcflag_t c_iflag; |
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| 32 | tcflag_t c_oflag; |
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| 33 | tcflag_t c_cflag; |
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| 34 | tcflag_t c_lflag; |
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| 35 | cc_t c_line; |
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| 36 | cc_t c_cc[KERNEL_NCCS]; |
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| 37 | }; |
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| 38 | |
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| 39 | } // namespace LIBC_NAMESPACE |
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| 40 | |
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| 41 | #endif // LLVM_LIBC_SRC_TERMIOS_LINUX_KERNEL_TERMIOS_H |
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| 42 | |
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