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linux/termios/powerpc: deal with powerpc-unique ioctl emulation 

The powerpc architecture, only, emulates the termios ioctls using the
glibc termios structure. Export the real kernel ones as the termios2
interface; although the kernel doesn't call it termios2, it is exactly
the termios2 interface, and it avoids the namespace clash between the
emulated ioctls and the real kernel ioctls.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
H. Peter Anvin (Intel) 2025-06-11 18:35:35 -07:00 committed by Adhemerval Zanella
parent 091256f0d1
commit 5f54d8bc48
1 changed files with 36 additions and 0 deletions
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36
sysdeps/unix/sysv/linux/powerpc/bits/ioctls.h Normal file
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/* Copyright (C) 1996-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _SYS_IOCTL_H
# error "Never use <bits/ioctls.h> directly; include <sys/ioctl.h> instead."
#endif
/* Use the definitions from the kernel header files. */
#include <asm/ioctls.h>
/* PowerPC quirk: on PowerPC only, ioctl() emulates the TCGETS/TCSETS*
ioctls with tcgetattr/tcsetattr using the glibc struct termios.
As struct termios2 is the same as the kernel struct termios on PowerPC,
simply consider the kernel ones as the termios2 interface, even
though the kernel doesn't call it that. */
#define TCGETS2 _IOR ('t', 19, struct termios2)
#define TCSETS2 _IOW ('t', 20, struct termios2)
#define TCSETSW2 _IOW ('t', 21, struct termios2)
#define TCSETSF2 _IOW ('t', 22, struct termios2)
#include <linux/sockios.h>