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linux: implement arbitrary and split speeds in termios

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Linux has supported arbitrary speeds and split speeds in the kernel
since 2008 on all platforms except Alpha (fixed in 2020), but glibc
was never updated to match. This is further complicated by POSIX uses
of macros for the cf[gs]et[io]speed interfaces, rather than plain
numbers, as it really ought to have.

On most platforms, the glibc ABI includes the c_[io]speed fields in
struct termios, but they are incorrectly used. On MIPS and SPARC, they
are entirely missing.

For backwards compatibility, the kernel will still use the legacy
speed fields unless they are set to BOTHER, and will use the legacy
output speed as the input speed if the latter is 0 (== B0). However,
the specific encoding used is visible to user space applications,
including ones other than the one running.

- SPARC and MIPS get a new struct termios, and tc[gs]etattr() is
  versioned accordingly. However, the new struct termios is set to be
  a strict extension of the old one, which means that cf* interfaces
  other than the speed-related ones do not need versioning.
- The Bxxx constants are redefined as equivalent to their integer
  values and the legacy Bxxx constants are renamed __Bxxx.
- cf[gs]et[io]speed() and cfsetspeed() are versioned accordingly.
- tcgetattr() and cfset[io]speed() are adjusted to always keep the
  c_[io]speed fields correct (unlike earlier versions), but to
  canonicalize the representation to ALSO configure the legacy fields
  if a valid legacy representation exists.
- tcsetattr(), too, canonicalizes the representation in this way
  before passing it to the kernel, to maximize compatibility with
  older applications/tools.
- The old IBAUD0 hack is removed; it is no longer necessary since
  even the legacy c_cflag baud rate fields have had separate input
  values for a long time.

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 18:35:36 -07:00
committed by Adhemerval Zanella
parent 5f54d8bc48
commit 5cf101a85a
62 changed files with 1133 additions and 456 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
NEWS
View File

@ -22,6 +22,10 @@ Major new features:
* The ISO C2Y family of unsigned abs functions, i.e.
uabs, ulabs, ullabs and uimaxabs, are now supported.
* On Linux, the <termios.h> interface now supports arbitrary baud rates;
speed_t is redefined to simply be the baud rate specified as an
unsigned int, which matches the kernel interface.
Deprecated and removed features, and other changes affecting compatibility:
* The glibc.rtld.execstack now supports a compatibility mode to allow

7
sysdeps/unix/sysv/linux/Versions
View File

@ -332,6 +332,13 @@ libc {
sched_getattr;
sched_setattr;
}
GLIBC_2.42 {
cfgetospeed;
cfgetispeed;
cfsetospeed;
cfsetispeed;
cfsetspeed;
}
GLIBC_PRIVATE {
# functions used in other libraries
__syscall_rt_sigqueueinfo;

5
sysdeps/unix/sysv/linux/aarch64/libc.abilist
View File

@ -2752,6 +2752,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

2
sysdeps/unix/sysv/linux/alpha/bits/termios-c_cflag.h
View File

@ -36,4 +36,6 @@
#ifdef __USE_MISC
# define ADDRB 04000000000
# define CMSPAR 010000000000 /* Mark or space (stick) parity. */
# define CRTSCTS 020000000000 /* Flow control. */
#endif

43
sysdeps/unix/sysv/linux/alpha/bits/termios-baud.h → sysdeps/unix/sysv/linux/alpha/bits/termios-cbaud.h
View File

@ -17,30 +17,29 @@
<https://www.gnu.org/licenses/>. */
#ifndef _TERMIOS_H
# error "Never include <bits/termios-baud.h> directly; use <termios.h> instead."
# error "Never include <bits/termios-cbaud.h> directly; use <termios.h> instead."
#endif
#ifdef __USE_MISC
# define CBAUD 0000037
# define CBAUDEX 0000000
# define CMSPAR 010000000000 /* mark or space (stick) parity */
# define CRTSCTS 020000000000 /* flow control */
# define CBAUD 000000037
# define CBAUDEX 000000000
# define CIBAUD 007600000
# define IBSHIFT 16
#endif
#define B57600 00020
#define B115200 00021
#define B230400 00022
#define B460800 00023
#define B500000 00024
#define B576000 00025
#define B921600 00026
#define B1000000 00027
#define B1152000 00030
#define B1500000 00031
#define B2000000 00032
#define B2500000 00033
#define B3000000 00034
#define B3500000 00035
#define B4000000 00036
#define __MAX_BAUD B4000000
#define __B57600 00020
#define __B115200 00021
#define __B230400 00022
#define __B460800 00023
#define __B500000 00024
#define __B576000 00025
#define __B921600 00026
#define __B1000000 00027
#define __B1152000 00030
#define __B1500000 00031
#define __B2000000 00032
#define __B2500000 00033
#define __B3000000 00034
#define __B3500000 00035
#define __B4000000 00036
#define __BOTHER 00037

11
sysdeps/unix/sysv/linux/alpha/kernel-features.h
View File

@ -54,4 +54,15 @@
#undef __ASSUME_CLONE3
#define __ASSUME_CLONE3 0
/* Alpha did not provide BOTHER, CIBAUD or the termios2 ioctls until
kernel 4.20. Even though struct __kernel_termios and struct
termios2 are the same on Alpha, Calling the legacy TCSETS* ioctls
with BOTHER set triggers a bug in these old kernels, so only use
the legacy TCSETS* ioctl numbers if neither BOTHER nor split speed is
needed; that way the code will fail gracefully. */
#if __LINUX_KERNEL_VERSION < 0x041400
# undef __ASSUME_TERMIOS2
# define __ASSUME_TERMIOS2 0
#endif
#endif /* _KERNEL_FEATURES_H */

43
sysdeps/unix/sysv/linux/alpha/kernel_termios.h
View File

@ -1,43 +0,0 @@
/* Copyright (C) 1997-2025 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 _KERNEL_TERMIOS_H
#define _KERNEL_TERMIOS_H 1
/* The following corresponds to the values from the Linux 2.1.20 kernel. */
/* We need the definition of tcflag_t, cc_t, and speed_t. */
#include <termios.h>
#define __KERNEL_NCCS 19
struct __kernel_termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_cc[__KERNEL_NCCS]; /* control characters */
cc_t c_line; /* line discipline */
speed_t c_ispeed; /* input speed */
speed_t c_ospeed; /* output speed */
};
#define _HAVE_C_ISPEED 1
#define _HAVE_C_OSPEED 1
#endif /* kernel_termios.h */

5
sysdeps/unix/sysv/linux/alpha/libc.abilist
View File

@ -3099,6 +3099,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

26
sysdeps/unix/sysv/linux/mips/bits/termios-struct.h → sysdeps/unix/sysv/linux/alpha/termios_arch.h
View File

@ -1,5 +1,6 @@
/* struct termios definition. Linux/mips version.
Copyright (C) 2019-2025 Free Software Foundation, Inc.
/* Architectural parameters for Linux termios - Alpha/PowerPC version
Copyright (C) 1997-2025 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
@ -13,22 +14,13 @@
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
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _TERMIOS_H
# error "Never include <bits/termios-struct.h> directly; use <termios.h> instead."
#ifndef TERMIOS_INTERNALS_H
# error "<termios_arch.h> should only be included from <termios_internals.h>"
#endif
#define NCCS 32
struct termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_line; /* line discipline */
cc_t c_cc[NCCS]; /* control characters */
#define _HAVE_STRUCT_TERMIOS_C_ISPEED 0
#define _HAVE_STRUCT_TERMIOS_C_OSPEED 0
};
#define _TERMIOS2_NCCS 19
#define _HAVE_TERMIOS2_C_CC_BEFORE_C_LINE 1
#define _HAVE_STRUCT_OLD_TERMIOS 0

5
sysdeps/unix/sysv/linux/arc/libc.abilist
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@ -2513,6 +2513,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/arm/be/libc.abilist
View File

@ -2805,6 +2805,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/arm/le/libc.abilist
View File

@ -2802,6 +2802,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

65
sysdeps/unix/sysv/linux/bits/termios-baud.h
View File

@ -20,29 +20,44 @@
# error "Never include <bits/termios-baud.h> directly; use <termios.h> instead."
#endif
#ifdef __USE_MISC
# define CBAUD 000000010017 /* Baud speed mask (not in POSIX). */
# define CBAUDEX 000000010000 /* Extra baud speed mask, included in CBAUD.
(not in POSIX). */
# define CIBAUD 002003600000 /* Input baud rate (not used). */
# define CMSPAR 010000000000 /* Mark or space (stick) parity. */
# define CRTSCTS 020000000000 /* Flow control. */
#endif
#define B0 0U
#define B50 50U
#define B75 75U
#define B110 110U
#define B134 134U
#define B150 150U
#define B200 200U
#define B300 300U
#define B600 600U
#define B1200 1200U
#define B1800 1800U
#define B2400 2400U
#define B4800 4800U
#define B7200 7200U
#define B9600 9600U
#define B14400 14400U
#define B19200 19200U
#define B28800 28800U
#define B33600 33600U
#define B38400 38400U
#define B57600 57600U
#define B76800 76800U
#define B115200 115200U
#define B153600 153600U
#define B230400 230400U
#define B307200 307200U
#define B460800 460800U
#define B500000 500000U
#define B576000 576000U
#define B614400 614400U
#define B921600 921600U
#define B1000000 1000000U
#define B1152000 1152000U
#define B1500000 1500000U
#define B2000000 2000000U
#define B2500000 2500000U
#define B3000000 3000000U
#define B3500000 3500000U
#define B4000000 4000000U
/* Extra output baud rates (not in POSIX). */
#define B57600 0010001
#define B115200 0010002
#define B230400 0010003
#define B460800 0010004
#define B500000 0010005
#define B576000 0010006
#define B921600 0010007
#define B1000000 0010010
#define B1152000 0010011
#define B1500000 0010012
#define B2000000 0010013
#define B2500000 0010014
#define B3000000 0010015
#define B3500000 0010016
#define B4000000 0010017
#define __MAX_BAUD B4000000
#define __MAX_BAUD 4294967295U

2
sysdeps/unix/sysv/linux/bits/termios-c_cflag.h
View File

@ -35,4 +35,6 @@
#ifdef __USE_MISC
# define ADDRB 04000000000
# define CMSPAR 010000000000 /* Mark or space (stick) parity. */
# define CRTSCTS 020000000000 /* Flow control. */
#endif

47
sysdeps/unix/sysv/linux/bits/termios-cbaud.h Normal file
View File

@ -0,0 +1,47 @@
/* termios baud rate selection definitions. Linux/generic version.
Copyright (C) 2019-2025 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 _TERMIOS_H
# error "Never include <bits/termios-cbaud.h> directly; use <termios.h> instead."
#endif
#ifdef __USE_MISC
# define CBAUD 000000010017 /* Baud speed mask (not in POSIX). */
# define CBAUDEX 000000010000 /* Extra baud speed mask, included in CBAUD.
(not in POSIX). */
# define CIBAUD 002003600000 /* Input baud rate. */
# define IBSHIFT 16
#endif
/* Extra output baud rates (not in POSIX). */
#define __BOTHER 0010000
#define __B57600 0010001
#define __B115200 0010002
#define __B230400 0010003
#define __B460800 0010004
#define __B500000 0010005
#define __B576000 0010006
#define __B921600 0010007
#define __B1000000 0010010
#define __B1152000 0010011
#define __B1500000 0010012
#define __B2000000 0010013
#define __B2500000 0010014
#define __B3000000 0010015
#define __B3500000 0010016
#define __B4000000 0010017

52
sysdeps/unix/sysv/linux/bits/termios.h
View File

@ -24,35 +24,41 @@ typedef unsigned char cc_t;
typedef unsigned int speed_t;
typedef unsigned int tcflag_t;
#ifdef _TERMIOS_H
# include <bits/termios-struct.h>
#endif
#include <bits/termios-c_cc.h>
#include <bits/termios-c_iflag.h>
#include <bits/termios-c_oflag.h>
/* c_cflag bit meaning */
#define B0 0000000 /* hang up */
#define B50 0000001
#define B75 0000002
#define B110 0000003
#define B134 0000004
#define B150 0000005
#define B200 0000006
#define B300 0000007
#define B600 0000010
#define B1200 0000011
#define B1800 0000012
#define B2400 0000013
#define B4800 0000014
#define B9600 0000015
#define B19200 0000016
#define B38400 0000017
#ifdef __USE_MISC
# define EXTA B19200
# define EXTB B38400
#endif
#include <bits/termios-baud.h>
#include <bits/termios-c_cflag.h>
#define __B0 0000000 /* hang up */
#define __B50 0000001
#define __B75 0000002
#define __B110 0000003
#define __B134 0000004
#define __B150 0000005
#define __B200 0000006
#define __B300 0000007
#define __B600 0000010
#define __B1200 0000011
#define __B1800 0000012
#define __B2400 0000013
#define __B4800 0000014
#define __B9600 0000015
#define __B19200 0000016
#define __B38400 0000017
#include <bits/termios-cbaud.h>
#ifdef __USE_MISC
# define EXTA __B19200
# define EXTB __B38400
# define BOTHER __BOTHER
#endif
#include <bits/termios-c_lflag.h>
#ifdef __USE_MISC
@ -74,3 +80,5 @@ typedef unsigned int tcflag_t;
#include <bits/termios-tcflow.h>
#include <bits/termios-misc.h>
#include <bits/termios-baud.h>

58
sysdeps/unix/sysv/linux/cfsetspeed.c Normal file
View File

@ -0,0 +1,58 @@
/* cfsetspeed(), Linux version.
Copyright (C) 1991-2025 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/>. */
#include <termios_internals.h>
/* Set both the input and output baud rates stored in *TERMIOS_P to SPEED. */
int
__cfsetspeed (struct termios *termios_p, speed_t speed)
{
tcflag_t cbaud = ___speed_to_cbaud (speed);
termios_p->c_ospeed = speed;
termios_p->c_ispeed = speed;
termios_p->c_cflag &= ~(CBAUD | CIBAUD);
termios_p->c_cflag |= cbaud | (cbaud << IBSHIFT);
return 0;
}
versioned_symbol (libc, __cfsetspeed, cfsetspeed, GLIBC_2_42);
#if _TERMIOS_OLD_COMPAT
int
attribute_compat_text_section
__old_cfsetspeed (old_termios_t *termios_p, speed_t speed)
{
speed_t real_speed = ___cbaud_to_speed (speed, -1);
if (real_speed == (speed_t)-1)
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
#if !_HAVE_STRUCT_OLD_TERMIOS
/* Otherwise these fields don't exist in old_termios_t */
termios_p->c_ospeed = real_speed;
termios_p->c_ispeed = real_speed;
#endif
termios_p->c_cflag &= ~(CBAUD | CIBAUD);
termios_p->c_cflag |= speed | (speed << IBSHIFT);
return 0;
}
compat_symbol (libc, __old_cfsetspeed, cfsetspeed, GLIBC_2_0);
#endif /* _TERMIOS_OLD_COMPAT */

5
sysdeps/unix/sysv/linux/csky/libc.abilist
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@ -2789,6 +2789,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/hppa/libc.abilist
View File

@ -2826,6 +2826,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/i386/libc.abilist
View File

@ -3009,6 +3009,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

29
sysdeps/unix/sysv/linux/isatty.c Normal file
View File

@ -0,0 +1,29 @@
/* Test whether a file descriptor refers to a terminal. Linux version.
Copyright (C) 1991-2025 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/>. */
#include <termios_internals.h>
/* Return 1 if FD is a terminal, 0 if not. This simply does a
TCGETS2 ioctl into a dummy buffer without parsing the result. */
int
__isatty (int fd)
{
struct termios2 k_termios;
return INLINE_SYSCALL_CALL (ioctl, fd, TCGETS2, &k_termios) == 0;
}
weak_alias (__isatty, isatty)

9
sysdeps/unix/sysv/linux/isatty_nostatus.c
View File

@ -15,15 +15,12 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <termios.h>
#include <kernel_termios.h>
#include <sys/ioctl.h>
#include <termios_internals.h>
/* Return 1 if FD is a terminal, 0 if not, without changing errno */
int
__isatty_nostatus (int fd)
{
struct __kernel_termios k_termios;
return INTERNAL_SYSCALL_CALL (ioctl, fd, TCGETS, &k_termios) == 0;
struct termios2 k_termios;
return INTERNAL_SYSCALL_CALL (ioctl, fd, TCGETS2, &k_termios) == 0;
}

4
sysdeps/unix/sysv/linux/kernel-features.h
View File

@ -54,6 +54,10 @@
configurations). */
#define __ASSUME_SET_ROBUST_LIST 1
/* The termios2 interface was introduced across all architectures except
Alpha in kernel 2.6.22. */
#define __ASSUME_TERMIOS2 1
/* Support for various CLOEXEC and NONBLOCK flags was added in
2.6.27. */
#define __ASSUME_IN_NONBLOCK 1

5
sysdeps/unix/sysv/linux/loongarch/lp64/libc.abilist
View File

@ -2273,6 +2273,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
View File

@ -2785,6 +2785,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
View File

@ -2952,6 +2952,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
View File

@ -2838,6 +2838,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
View File

@ -2835,6 +2835,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

4
sysdeps/unix/sysv/linux/mips/Versions
View File

@ -26,6 +26,10 @@ libc {
pthread_attr_setstack;
pthread_attr_setstacksize;
}
GLIBC_2.42 {
tcgetattr;
tcsetattr;
}
GLIBC_PRIVATE {
# nptl/pthread_cond_timedwait.c uses INTERNAL_VSYSCALL(clock_gettime).
__vdso_clock_gettime;

7
sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
View File

@ -2913,7 +2913,14 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 tcgetattr F
GLIBC_2.42 tcsetattr F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F
GLIBC_2.42 ulabs F

7
sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
View File

@ -2911,7 +2911,14 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 tcgetattr F
GLIBC_2.42 tcsetattr F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F
GLIBC_2.42 ulabs F

7
sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
View File

@ -2919,7 +2919,14 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 tcgetattr F
GLIBC_2.42 tcsetattr F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F
GLIBC_2.42 ulabs F

7
sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
View File

@ -2821,7 +2821,14 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 tcgetattr F
GLIBC_2.42 tcsetattr F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F
GLIBC_2.42 ulabs F

21
sysdeps/unix/sysv/linux/kernel_termios.h → sysdeps/unix/sysv/linux/mips/termios_arch.h
View File

@ -1,4 +1,6 @@
/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
/* Architectural parameters for Linux termios - MIPS version
Copyright (C) 1991-2025 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
@ -15,23 +17,18 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _KERNEL_TERMIOS_H
#define _KERNEL_TERMIOS_H 1
/* The following corresponds to the values from the Linux 2.1.20 kernel. */
#define _TERMIOS2_NCCS 23
#define _HAVE_TERMIOS2_C_CC_BEFORE_C_LINE 0
#define __KERNEL_NCCS 19
#define _HAVE_STRUCT_OLD_TERMIOS 1
struct __kernel_termios
#define OLD_NCCS 32
struct old_termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_line; /* line discipline */
cc_t c_cc[__KERNEL_NCCS]; /* control characters */
cc_t c_cc[OLD_NCCS]; /* control characters */
};
#define _HAVE_C_ISPEED 0
#define _HAVE_C_OSPEED 0
#endif /* kernel_termios.h */

23
sysdeps/unix/sysv/linux/old_termios.h Normal file
View File

@ -0,0 +1,23 @@
/* old_termios.h for Linux other than MIPS and SPARC
Copyright (C) 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/>. */
/* By default, no old termios structure */
#define _HAVE_STRUCT_OLD_TERMIOS 0
#define OLD_NCCS NCCS
typedef struct termios old_termios_t;

5
sysdeps/unix/sysv/linux/or1k/libc.abilist
View File

@ -2263,6 +2263,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

2
sysdeps/unix/sysv/linux/powerpc/bits/termios-c_cflag.h
View File

@ -36,4 +36,6 @@
#ifdef __USE_MISC
# define ADDRB 04000000000
# define CMSPAR 010000000000 /* Mark or space (stick) parity. */
# define CRTSCTS 020000000000 /* Flow control. */
#endif

42
sysdeps/unix/sysv/linux/powerpc/bits/termios-baud.h → sysdeps/unix/sysv/linux/powerpc/bits/termios-cbaud.h
View File

@ -17,29 +17,29 @@
<https://www.gnu.org/licenses/>. */
#ifndef _TERMIOS_H
# error "Never include <bits/termios-baud.h> directly; use <termios.h> instead."
# error "Never include <bits/termios-cbaud.h> directly; use <termios.h> instead."
#endif
#ifdef __USE_MISC
# define CBAUD 0000377
# define CBAUDEX 0000020
# define CMSPAR 010000000000 /* mark or space (stick) parity */
# define CRTSCTS 020000000000 /* flow control */
# define CBAUD 000000377
# define CBAUDEX 000000020
# define CIBAUD 077600000
# define IBSHIFT 16
#endif
#define B57600 00020
#define B115200 00021
#define B230400 00022
#define B460800 00023
#define B500000 00024
#define B576000 00025
#define B921600 00026
#define B1000000 00027
#define B1152000 00030
#define B1500000 00031
#define B2000000 00032
#define B2500000 00033
#define B3000000 00034
#define B3500000 00035
#define B4000000 00036
#define __MAX_BAUD B4000000
#define __B57600 00020
#define __B115200 00021
#define __B230400 00022
#define __B460800 00023
#define __B500000 00024
#define __B576000 00025
#define __B921600 00026
#define __B1000000 00027
#define __B1152000 00030
#define __B1500000 00031
#define __B2000000 00032
#define __B2500000 00033
#define __B3000000 00034
#define __B3500000 00035
#define __B4000000 00036
#define __BOTHER 00037

53
sysdeps/unix/sysv/linux/powerpc/kernel_termios.h
View File

@ -1,53 +0,0 @@
/* Copyright (C) 1997-2025 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 _KERNEL_TERMIOS_H
#define _KERNEL_TERMIOS_H 1
/* We need the definition of tcflag_t, cc_t, and speed_t. */
#include <termios.h>
#define __KERNEL_NCCS 19
struct __kernel_termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_cc[__KERNEL_NCCS]; /* control characters */
cc_t c_line; /* line discipline */
speed_t c_ispeed; /* input speed */
speed_t c_ospeed; /* output speed */
};
#define _HAVE_C_ISPEED 1
#define _HAVE_C_OSPEED 1
/* We have the kernel termios structure, so we can presume this code knows
what it's doing... */
#undef TCGETS
#undef TCSETS
#undef TCSETSW
#undef TCSETSF
#define TCGETS _IOR ('t', 19, struct __kernel_termios)
#define TCSETS _IOW ('t', 20, struct __kernel_termios)
#define TCSETSW _IOW ('t', 21, struct __kernel_termios)
#define TCSETSF _IOW ('t', 22, struct __kernel_termios)
#endif /* kernel_termios.h */

5
sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
View File

@ -3142,6 +3142,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
View File

@ -3187,6 +3187,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
View File

@ -2896,6 +2896,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
View File

@ -2972,6 +2972,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

26
sysdeps/unix/sysv/linux/sparc/bits/termios-struct.h → sysdeps/unix/sysv/linux/powerpc/termios_arch.h
View File

@ -1,5 +1,6 @@
/* struct termios definition. Linux/sparc version.
Copyright (C) 2019-2025 Free Software Foundation, Inc.
/* Architectural parameters for Linux termios - Alpha/PowerPC version
Copyright (C) 1997-2025 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
@ -13,22 +14,13 @@
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
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _TERMIOS_H
# error "Never include <bits/termios-struct.h> directly; use <termios.h> instead."
#ifndef TERMIOS_INTERNALS_H
# error "<termios_arch.h> should only be included from <termios_internals.h>"
#endif
#define NCCS 17
struct termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_line; /* line discipline */
cc_t c_cc[NCCS]; /* control characters */
#define _HAVE_STRUCT_TERMIOS_C_ISPEED 0
#define _HAVE_STRUCT_TERMIOS_C_OSPEED 0
};
#define _TERMIOS2_NCCS 19
#define _HAVE_TERMIOS2_C_CC_BEFORE_C_LINE 1
#define _HAVE_STRUCT_OLD_TERMIOS 0

5
sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist
View File

@ -2516,6 +2516,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
View File

@ -2716,6 +2716,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
View File

@ -3140,6 +3140,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
View File

@ -2933,6 +2933,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/sh/be/libc.abilist
View File

@ -2832,6 +2832,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/sh/le/libc.abilist
View File

@ -2829,6 +2829,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

4
sysdeps/unix/sysv/linux/sparc/Versions
View File

@ -29,6 +29,10 @@ libc {
__getshmlba;
}
GLIBC_2.42 {
tcgetattr;
tcsetattr;
}
GLIBC_PRIVATE {
# nptl/pthread_cond_timedwait.c uses INTERNAL_VSYSCALL(clock_gettime).
__vdso_clock_gettime;

39
sysdeps/unix/sysv/linux/sparc/bits/termios-baud.h → sysdeps/unix/sysv/linux/sparc/bits/termios-cbaud.h
View File

@ -17,30 +17,29 @@
<https://www.gnu.org/licenses/>. */
#ifndef _TERMIOS_H
# error "Never include <bits/termios-baud.h> directly; use <termios.h> instead."
# error "Never include <bits/termios-cbaud.h> directly; use <termios.h> instead."
#endif
#ifdef __USE_MISC
# define CBAUD 0x0000100f
# define CBAUDEX 0x00001000
# define CIBAUD 0x100f0000 /* input baud rate (not used) */
# define CMSPAR 0x40000000 /* mark or space (stick) parity */
# define CRTSCTS 0x80000000 /* flow control */
# define CIBAUD 0x100f0000 /* input baud rate */
# define IBSHIFT 16
#endif
#define B57600 0x00001001
#define B115200 0x00001002
#define B230400 0x00001003
#define B460800 0x00001004
#define B76800 0x00001005
#define B153600 0x00001006
#define B307200 0x00001007
#define B614400 0x00001008
#define B921600 0x00001009
#define B500000 0x0000100a
#define B576000 0x0000100b
#define B1000000 0x0000100c
#define B1152000 0x0000100d
#define B1500000 0x0000100e
#define B2000000 0x0000100f
#define __MAX_BAUD B2000000
#define __B57600 0x00001001
#define __B115200 0x00001002
#define __B230400 0x00001003
#define __B460800 0x00001004
#define __B76800 0x00001005
#define __B153600 0x00001006
#define __B307200 0x00001007
#define __B614400 0x00001008
#define __B921600 0x00001009
#define __B500000 0x0000100a
#define __B576000 0x0000100b
#define __B1000000 0x0000100c
#define __B1152000 0x0000100d
#define __B1500000 0x0000100e
#define __B2000000 0x0000100f
#define __BOTHER 0x00001000

7
sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
View File

@ -3161,7 +3161,14 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 tcgetattr F
GLIBC_2.42 tcsetattr F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F
GLIBC_2.42 ulabs F

7
sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
View File

@ -2797,7 +2797,14 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 tcgetattr F
GLIBC_2.42 tcsetattr F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F
GLIBC_2.42 ulabs F

24
sysdeps/unix/sysv/linux/sparc/kernel_termios.h → sysdeps/unix/sysv/linux/sparc/termios_arch.h
View File

@ -1,4 +1,6 @@
/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
/* Architectural parameters for Linux termios - SPARC version
Copyright (C) 1991-2025 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
@ -15,26 +17,18 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _KERNEL_TERMIOS_H
#define _KERNEL_TERMIOS_H 1
/* The following corresponds to the values from the Linux 2.1.20 kernel. */
#define _TERMIOS2_NCCS 19
#define _HAVE_TERMIOS2_C_CC_BEFORE_C_LINE 0
/* We need the definition of tcflag_t, cc_t, and speed_t. */
#include <termios.h>
#define _HAVE_STRUCT_OLD_TERMIOS 1
#define __KERNEL_NCCS 17
struct __kernel_termios
#define OLD_NCCS 17
struct old_termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_line; /* line discipline */
cc_t c_cc[__KERNEL_NCCS]; /* control characters */
cc_t c_cc[OLD_NCCS]; /* control characters */
};
#define _HAVE_C_ISPEED 0
#define _HAVE_C_OSPEED 0
#endif /* kernel_termios.h */

361
sysdeps/unix/sysv/linux/speed.c
View File

@ -16,82 +16,347 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stddef.h>
#include <errno.h>
#include <termios.h>
#include <sysdep.h>
#include <termios_internals.h>
/* This is a gross hack around a kernel bug. If the cfsetispeed functions
is called with the SPEED argument set to zero this means use the same
speed as for output. But we don't have independent input and output
speeds and therefore cannot record this.
/* Conversions between legacy c_cflag fields and actual baud rates */
We use an unused bit in the `c_iflag' field to keep track of this
use of `cfsetispeed'. The value here must correspond to the one used
in `tcsetattr.c'. */
#define IBAUD0 020000000000
/* These expressions may seem complicated; the _cbix() macro
compresses the CBAUD field into an index in the range 0-31. On most
Linux platforms, the CBAUD field is 5 bits, but the topmost bit
indicated by CBAUDEX, is discontinous with the rest.
The resulting masks look like:
Alpha PowerPC others
CBAUD 0x001f 0x00ff 0x100f
CBAUDEX 0x0000 0x0010 0x1000
LOWCBAUD 0x001f 0x000f 0x000f
CBAUDMASK 0x001f 0x001f 0x100f
CBAUDMASK is used to test for invalid values passed to the
compatibility functions or in termios::c_cflag on PowerPC.
The divide-multiply sequence in the _cbix() macro gets converted
to shift and masks as necessary by the compiler. */
#define LOWCBAUD (CBAUD & (CBAUDEX-1))
#define _cbix(x) (((x) & LOWCBAUD) | \
(CBAUDEX ? ((x) & CBAUDEX)/CBAUDEX * (LOWCBAUD+1) : 0))
#define CBAUDMASK (LOWCBAUD | CBAUDEX)
/* Compile time sanity checks for broken CBAUD or CIBAUD definitions */
#if CIBAUD != (CBAUD << IBSHIFT)
# error "CIBAUD should == CBAUD << IBSHIFT"
#elif CBAUDEX & (CBAUDEX-1)
# error "CBAUDEX should either be 0 or a single bit"
#elif !(CBAUD & 1)
# error "The CBAUD field should start at bit 0"
#elif CBAUDEX & ~CBAUD
# error "CBAUD should include the CBAUDEX bit"
#endif
speed_t
___cbaud_to_speed (tcflag_t c_cflag, speed_t other)
{
static const speed_t cbaudix_to_speed [] =
{
[0 ... _cbix(CBAUDMASK)] = -1,
[_cbix(__B0)] = 0,
[_cbix(__B50)] = 50,
[_cbix(__B75)] = 75,
[_cbix(__B110)] = 110,
[_cbix(__B134)] = 134,
[_cbix(__B150)] = 150,
[_cbix(__B200)] = 200,
[_cbix(__B300)] = 300,
[_cbix(__B600)] = 600,
[_cbix(__B1200)] = 1200,
[_cbix(__B1800)] = 1800,
[_cbix(__B2400)] = 2400,
[_cbix(__B4800)] = 4800,
[_cbix(__B9600)] = 9600,
[_cbix(__B19200)] = 19200,
[_cbix(__B38400)] = 38400,
[_cbix(__B57600)] = 57600,
[_cbix(__B115200)] = 115200,
[_cbix(__B230400)] = 230400,
[_cbix(__B460800)] = 460800,
[_cbix(__B500000)] = 500000,
[_cbix(__B576000)] = 576000,
[_cbix(__B921600)] = 921600,
[_cbix(__B1000000)] = 1000000,
[_cbix(__B1152000)] = 1152000,
[_cbix(__B1500000)] = 1500000,
[_cbix(__B2000000)] = 2000000,
#ifdef __B7200
[_cbix(__B7200)] = 7200,
#endif
#ifdef __B14400
[_cbix(__B14400)] = 14400,
#endif
#ifdef __B28800
[_cbix(__B28800)] = 28800,
#endif
#ifdef __B76800
[_cbix(__B76800)] = 76800,
#endif
#ifdef __B153600
[_cbix(__B153600)] = 153600,
#endif
#ifdef __B307200
[_cbix(__B307200)] = 307200,
#endif
#ifdef __B614400
[_cbix(__B614400)] = 614400,
#endif
#ifdef __B2500000
[_cbix(__B2500000)] = 2500000,
#endif
#ifdef __B3000000
[_cbix(__B3000000)] = 3000000,
#endif
#ifdef __B3500000
[_cbix(__B3500000)] = 3500000,
#endif
#ifdef __B4000000
[_cbix(__B4000000)] = 4000000,
#endif
};
speed_t speed;
if (c_cflag & (tcflag_t)(~CBAUDMASK))
return other;
speed = cbaudix_to_speed[_cbix(c_cflag)];
return speed == (speed_t)-1 ? other : speed;
}
tcflag_t
___speed_to_cbaud (speed_t speed)
{
switch (speed) {
case 0:
return __B0;
case 50:
return __B50;
case 75:
return __B75;
case 110:
return __B110;
case 134:
return __B134;
case 150:
return __B150;
case 200:
return __B200;
case 300:
return __B300;
case 600:
return __B600;
case 1200:
return __B1200;
case 1800:
return __B1800;
case 2400:
return __B2400;
case 4800:
return __B4800;
case 9600:
return __B9600;
case 19200:
return __B19200;
case 38400:
return __B38400;
case 57600:
return __B57600;
case 115200:
return __B115200;
case 230400:
return __B230400;
case 460800:
return __B460800;
case 500000:
return __B500000;
case 576000:
return __B576000;
case 921600:
return __B921600;
case 1000000:
return __B1000000;
case 1152000:
return __B1152000;
case 1500000:
return __B1500000;
case 2000000:
return __B2000000;
#ifdef __B76800
case 76800:
return __B76800;
#endif
#ifdef __B153600
case 153600:
return __B153600;
#endif
#ifdef __B307200
case 307200:
return __B307200;
#endif
#ifdef __B614400
case 614400:
return __B614400;
#endif
#ifdef __B2500000
case 2500000:
return __B2500000;
#endif
#ifdef __B3000000
case 3000000:
return __B3000000;
#endif
#ifdef __B3500000
case 3500000:
return __B3500000;
#endif
#ifdef __B4000000
case 4000000:
return __B4000000;
#endif
default:
return __BOTHER;
}
}
/* Canonicalize the representation of speed fields in a kernel
termios2 structure. Specifically, if there is a valid legacy cbaud
representation (not __BOTHER), use it and propagate the
corresponding speed value to ispeed/ospeed, otherwise the other way
around if possible. Finally, if the input speed is zero, copy the
output speed to the input speed.
The kernel doesn't do this canonicalization, which can affect
legacy utilities, so do it here.
This is used by tcgetattr() and tcsetattr(). */
void
___termios2_canonicalize_speeds (struct termios2 *k_termios_p)
{
k_termios_p->c_ospeed =
___cbaud_to_speed (cbaud (k_termios_p->c_cflag), k_termios_p->c_ospeed);
k_termios_p->c_ispeed =
___cbaud_to_speed (cibaud (k_termios_p->c_cflag), k_termios_p->c_ispeed);
if (!k_termios_p->c_ispeed)
k_termios_p->c_ispeed = k_termios_p->c_ospeed;
k_termios_p->c_cflag &= ~(CBAUD | CIBAUD);
k_termios_p->c_cflag |= ___speed_to_cbaud (k_termios_p->c_ospeed);
k_termios_p->c_cflag |= ___speed_to_cbaud (k_termios_p->c_ispeed) << IBSHIFT;
}
/* Return the output baud rate stored in *TERMIOS_P. */
speed_t
cfgetospeed (const struct termios *termios_p)
__cfgetospeed (const struct termios *termios_p)
{
return termios_p->c_cflag & (CBAUD | CBAUDEX);
return termios_p->c_ospeed;
}
versioned_symbol (libc, __cfgetospeed, cfgetospeed, GLIBC_2_42);
/* Return the input baud rate stored in *TERMIOS_P.
Although for Linux there is no difference between input and output
speed, the numerical 0 is a special case for the input baud rate. It
should set the input baud rate to the output baud rate. */
/* Return the input baud rate stored in *TERMIOS_P. */
speed_t
cfgetispeed (const struct termios *termios_p)
__cfgetispeed (const struct termios *termios_p)
{
return ((termios_p->c_iflag & IBAUD0)
? 0 : termios_p->c_cflag & (CBAUD | CBAUDEX));
return termios_p->c_ispeed;
}
versioned_symbol (libc, __cfgetispeed, cfgetispeed, GLIBC_2_42);
/* Set the output baud rate stored in *TERMIOS_P to SPEED. */
int
cfsetospeed (struct termios *termios_p, speed_t speed)
__cfsetospeed (struct termios *termios_p, speed_t speed)
{
if ((speed & ~CBAUD) != 0
&& (speed < B57600 || speed > __MAX_BAUD))
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
tcflag_t cbaud = ___speed_to_cbaud (speed);
#if _HAVE_STRUCT_TERMIOS_C_OSPEED
termios_p->c_ospeed = speed;
#endif
termios_p->c_cflag &= ~(CBAUD | CBAUDEX);
termios_p->c_cflag |= speed;
termios_p->c_cflag &= ~CBAUD;
termios_p->c_cflag |= cbaud;
return 0;
}
libc_hidden_def (cfsetospeed)
versioned_symbol (libc, __cfsetospeed, cfsetospeed, GLIBC_2_42);
/* Set the input baud rate stored in *TERMIOS_P to SPEED.
Although for Linux there is no difference between input and output
speed, the numerical 0 is a special case for the input baud rate. It
should set the input baud rate to the output baud rate. */
/* Set the input baud rate stored in *TERMIOS_P to SPEED. */
int
cfsetispeed (struct termios *termios_p, speed_t speed)
__cfsetispeed (struct termios *termios_p, speed_t speed)
{
if ((speed & ~CBAUD) != 0
&& (speed < B57600 || speed > __MAX_BAUD))
tcflag_t cbaud = ___speed_to_cbaud (speed);
termios_p->c_ispeed = speed;
termios_p->c_cflag &= ~CIBAUD;
termios_p->c_cflag |= cbaud << IBSHIFT;
return 0;
}
versioned_symbol (libc, __cfsetispeed, cfsetispeed, GLIBC_2_42);
#if _TERMIOS_OLD_COMPAT
/* Legacy versions which returns cbaud-encoded speed_t values */
speed_t
attribute_compat_text_section
__old_cfgetospeed (const old_termios_t *termios_p)
{
return cbaud (termios_p->c_cflag);
}
compat_symbol (libc, __old_cfgetospeed, cfgetospeed, GLIBC_2_0);
speed_t
attribute_compat_text_section
__old_cfgetispeed (const old_termios_t *termios_p)
{
return cibaud (termios_p->c_cflag);
}
compat_symbol (libc, __old_cfgetispeed, cfgetispeed, GLIBC_2_0);
int
attribute_compat_text_section
__old_cfsetospeed (old_termios_t *termios_p, speed_t speed)
{
speed_t real_speed = ___cbaud_to_speed (speed, -1);
if (real_speed == (speed_t)-1)
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
#if _HAVE_STRUCT_TERMIOS_C_ISPEED
termios_p->c_ispeed = speed;
#if !_HAVE_STRUCT_OLD_TERMIOS
/* Otherwise this field doesn't exist in old_termios_t */
termios_p->c_ospeed = real_speed;
#endif
if (speed == 0)
termios_p->c_iflag |= IBAUD0;
else
{
termios_p->c_iflag &= ~IBAUD0;
termios_p->c_cflag &= ~(CBAUD | CBAUDEX);
termios_p->c_cflag &= ~CBAUD;
termios_p->c_cflag |= speed;
}
return 0;
}
libc_hidden_def (cfsetispeed)
compat_symbol (libc, __old_cfsetospeed, cfsetospeed, GLIBC_2_0);
int
attribute_compat_text_section
__old_cfsetispeed (old_termios_t *termios_p, speed_t speed)
{
speed_t real_speed = ___cbaud_to_speed (speed, -1);
if (real_speed == (speed_t)-1)
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
#if !_HAVE_STRUCT_OLD_TERMIOS
/* Otherwise this field doesn't exist in old_termios_t */
termios_p->c_ispeed = real_speed;
#endif
termios_p->c_cflag &= ~CIBAUD;
termios_p->c_cflag |= speed << IBSHIFT;
return 0;
}
compat_symbol (libc, __old_cfsetispeed, cfsetispeed, GLIBC_2_0);
#endif /* _TERMIOS_OLD_COMPAT */

76
sysdeps/unix/sysv/linux/tcgetattr.c
View File

@ -15,66 +15,56 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sysdep.h>
/* The difference here is that the termios structure used in the
kernel is not the same as we use in the libc. Therefore we must
translate it here. */
#include <kernel_termios.h>
#include <termios_internals.h>
/* Put the state of FD into *TERMIOS_P. */
int
__tcgetattr (int fd, struct termios *termios_p)
{
struct __kernel_termios k_termios;
int retval;
struct termios2 k_termios;
long int retval = INLINE_SYSCALL_CALL (ioctl, fd, TCGETS2, &k_termios);
retval = INLINE_SYSCALL (ioctl, 3, fd, TCGETS, &k_termios);
if (__glibc_likely (retval == 0))
if (__glibc_likely (retval != -1))
{
___termios2_canonicalize_speeds (&k_termios);
memset (termios_p, 0, sizeof (*termios_p));
termios_p->c_iflag = k_termios.c_iflag;
termios_p->c_oflag = k_termios.c_oflag;
termios_p->c_cflag = k_termios.c_cflag;
termios_p->c_lflag = k_termios.c_lflag;
termios_p->c_line = k_termios.c_line;
#if _HAVE_STRUCT_TERMIOS_C_ISPEED
# if _HAVE_C_ISPEED
termios_p->c_ispeed = k_termios.c_ispeed;
# else
termios_p->c_ispeed = k_termios.c_cflag & (CBAUD | CBAUDEX);
# endif
#endif
#if _HAVE_STRUCT_TERMIOS_C_OSPEED
# if _HAVE_C_OSPEED
termios_p->c_ospeed = k_termios.c_ospeed;
# else
termios_p->c_ospeed = k_termios.c_cflag & (CBAUD | CBAUDEX);
# endif
#endif
if (sizeof (cc_t) == 1 || _POSIX_VDISABLE == 0
|| (unsigned char) _POSIX_VDISABLE == (unsigned char) -1)
memset (__mempcpy (&termios_p->c_cc[0], &k_termios.c_cc[0],
__KERNEL_NCCS * sizeof (cc_t)),
_POSIX_VDISABLE, (NCCS - __KERNEL_NCCS) * sizeof (cc_t));
else
{
memcpy (&termios_p->c_cc[0], &k_termios.c_cc[0],
__KERNEL_NCCS * sizeof (cc_t));
termios_p->c_ispeed = k_termios.c_ispeed;
for (size_t cnt = __KERNEL_NCCS; cnt < NCCS; ++cnt)
termios_p->c_cc[cnt] = _POSIX_VDISABLE;
}
copy_c_cc (termios_p->c_cc, NCCS, k_termios.c_cc, _TERMIOS2_NCCS);
}
return retval;
}
libc_hidden_def (__tcgetattr)
#if _TERMIOS_OLD_COMPAT && _HAVE_STRUCT_OLD_TERMIOS
versioned_symbol (libc, __tcgetattr, tcgetattr, GLIBC_2_42);
/* Legacy version for shorter struct termios */
int
attribute_compat_text_section
__old_tcgetattr (int fd, old_termios_t *termios_p)
{
struct termios new_termios;
int retval = __tcgetattr (fd, &new_termios);
if (__glibc_likely (retval != -1))
{
memcpy (termios_p, &new_termios, sizeof (*termios_p));
}
return retval;
}
compat_symbol (libc, __old_tcgetattr, tcgetattr, GLIBC_2_0);
#else
weak_alias (__tcgetattr, tcgetattr)
#endif

123
sysdeps/unix/sysv/linux/tcsetattr.c
View File

@ -15,67 +15,94 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <string.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sysdep.h>
/* The difference here is that the termios structure used in the
kernel is not the same as we use in the libc. Therefore we must
translate it here. */
#include <kernel_termios.h>
/* This is a gross hack around a kernel bug. If the cfsetispeed functions
is called with the SPEED argument set to zero this means use the same
speed as for output. But we don't have independent input and output
speeds and therefore cannot record this.
We use an unused bit in the `c_iflag' field to keep track of this
use of `cfsetispeed'. The value here must correspond to the one used
in `speed.c'. */
#define IBAUD0 020000000000
#include <termios_internals.h>
#define static_assert_equal(x,y) _Static_assert ((x) == (y), #x " != " #y)
/* Set the state of FD to *TERMIOS_P. */
int
__tcsetattr (int fd, int optional_actions, const struct termios *termios_p)
{
struct __kernel_termios k_termios;
unsigned long int cmd;
struct termios2 k_termios;
unsigned long cmd;
switch (optional_actions)
{
case TCSANOW:
cmd = TCSETS;
break;
case TCSADRAIN:
cmd = TCSETSW;
break;
case TCSAFLUSH:
cmd = TCSETSF;
break;
default:
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
}
memset (&k_termios, 0, sizeof k_termios);
k_termios.c_iflag = termios_p->c_iflag & ~IBAUD0;
k_termios.c_iflag = termios_p->c_iflag;
k_termios.c_oflag = termios_p->c_oflag;
k_termios.c_cflag = termios_p->c_cflag;
k_termios.c_lflag = termios_p->c_lflag;
k_termios.c_line = termios_p->c_line;
#if _HAVE_C_ISPEED && _HAVE_STRUCT_TERMIOS_C_ISPEED
k_termios.c_ispeed = termios_p->c_ispeed;
#endif
#if _HAVE_C_OSPEED && _HAVE_STRUCT_TERMIOS_C_OSPEED
k_termios.c_ospeed = termios_p->c_ospeed;
#endif
memcpy (&k_termios.c_cc[0], &termios_p->c_cc[0],
__KERNEL_NCCS * sizeof (cc_t));
return INLINE_SYSCALL (ioctl, 3, fd, cmd, &k_termios);
k_termios.c_ospeed = termios_p->c_ospeed;
k_termios.c_ispeed = termios_p->c_ispeed;
___termios2_canonicalize_speeds (&k_termios);
copy_c_cc (k_termios.c_cc, _TERMIOS2_NCCS, termios_p->c_cc, NCCS);
/*
* Choose the proper ioctl number to invoke.
*
* Alpha got TCSETS2 late (Linux 4.20), but has the same structure
* format, and it only needs TCSETS2 if either it needs to use
* __BOTHER or split speed. All other architectures have TCSETS2 as
* far back as the current glibc supports. Calling TCSETS with
* __BOTHER causes unpredictable results on old Alpha kernels and
* could even crash them.
*/
static_assert_equal(TCSADRAIN, TCSANOW + 1);
static_assert_equal(TCSAFLUSH, TCSANOW + 2);
static_assert_equal(TCSETSW2, TCSETS2 + 1);
static_assert_equal(TCSETSF2, TCSETS2 + 2);
static_assert_equal(TCSETSW, TCSETS + 1);
static_assert_equal(TCSETSF, TCSETS + 2);
cmd = (long)optional_actions - TCSANOW;
if (cmd > 2)
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
if (__ASSUME_TERMIOS2 ||
k_termios.c_ospeed != k_termios.c_ispeed ||
cbaud (k_termios.c_cflag) == __BOTHER)
{
cmd += TCSETS2;
}
else
{
cmd += TCSETS;
k_termios.c_cflag &= ~CIBAUD;
}
return INLINE_SYSCALL_CALL (ioctl, fd, cmd, &k_termios);
}
libc_hidden_def (__tcsetattr)
#if _HAVE_STRUCT_OLD_TERMIOS && _TERMIOS_OLD_COMPAT
versioned_symbol (libc, __tcsetattr, tcsetattr, GLIBC_2_42);
/* Legacy version for shorter struct termios without speed fields */
int
attribute_compat_text_section
__old_tcsetattr (int fd, int optional_actions, const old_termios_t *termios_p)
{
struct termios new_termios;
memset (&new_termios, 0, sizeof (new_termios));
new_termios.c_iflag = termios_p->c_iflag;
new_termios.c_oflag = termios_p->c_oflag;
new_termios.c_cflag = termios_p->c_cflag;
new_termios.c_lflag = termios_p->c_lflag;
new_termios.c_line = termios_p->c_line;
copy_c_cc(new_termios.c_cc, NCCS, termios_p->c_cc, OLD_NCCS);
return __tcsetattr (fd, optional_actions, &new_termios);
}
compat_symbol (libc, __old_tcsetattr, tcsetattr, GLIBC_2_0);
#else
weak_alias (__tcsetattr, tcsetattr)
#endif

28
sysdeps/unix/sysv/linux/mips/kernel_termios.h → sysdeps/unix/sysv/linux/termios_arch.h
View File

@ -1,4 +1,6 @@
/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
/* Architectural parameters for Linux termios - generic version
Copyright (C) 1997-2025 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
@ -12,26 +14,10 @@
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
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _KERNEL_TERMIOS_H
#define _KERNEL_TERMIOS_H 1
/* The following corresponds to the values from the Linux 2.1.24 kernel. */
#define _TERMIOS2_NCCS 19
#define _HAVE_TERMIOS2_C_CC_BEFORE_C_LINE 0
#define __KERNEL_NCCS 23
struct __kernel_termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_line; /* line discipline */
cc_t c_cc[__KERNEL_NCCS]; /* control characters */
};
#define _HAVE_C_ISPEED 0
#define _HAVE_C_OSPEED 0
#endif /* kernel_termios.h */
#define _HAVE_STRUCT_OLD_TERMIOS 0

143
sysdeps/unix/sysv/linux/termios_internals.h Normal file
View File

@ -0,0 +1,143 @@
/* termios functions internal implementation header for Linux
Copyright (C) 1991-2025 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 TERMIOS_INTERNALS_H
#define TERMIOS_INTERNALS_H 1
#include <stddef.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sysdep.h>
#include <shlib-compat.h>
#include <termios_arch.h>
/* ---- Kernel interface definitions ---- */
/* The the termios2 structure used in the kernel interfaces is not the
same as the termios structure we use in the libc. Therefore we
must translate it here. */
struct termios2
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
#if _HAVE_TERMIOS2_C_CC_BEFORE_C_LINE
cc_t c_cc[_TERMIOS2_NCCS]; /* control characters */
cc_t c_line; /* line discipline */
#else
cc_t c_line; /* line discipline */
cc_t c_cc[_TERMIOS2_NCCS]; /* control characters */
#endif
speed_t c_ispeed; /* input speed */
speed_t c_ospeed; /* output speed */
};
/* Alpha got termios2 late, but TCGETS has exactly the same structure
format and function as TCGETS2. On all other platforms, the termios2
interface exists as far back as this version of glibc supports.
For TCGETS* it is more complicated; this is handled in tcsetattr.c.
Some other architectures only have the equivalent of the termios2
interface, in which case the old ioctl names are the only ones
presented, but are equivalent to the new ones. */
#ifndef TCGETS2
# define TCGETS2 TCGETS
# define TCSETS2 TCSETS
# define TCSETSW2 TCSETSW
# define TCSETSF2 TCSETSF
#elif !__ASSUME_TERMIOS2
/* Hack for Alpha */
# undef TCGETS2
# define TCGETS2 TCGETS
#endif
/* ---- Application interface definitions ---- */
/*
* Should old speed_t and struct termios (if applicable) compatibility
* functions be included?
*/
#define _TERMIOS_OLD_COMPAT SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_42)
/*
* Old struct termios (without c_ispeed and c_ospeed fields) if
* applicable. The new struct termios *must* be binary identical up to
* the sizeof the old structure.
*
* This only applies to SPARC and MIPS; for other architectures the
* new and old speed_t interfaces both use the same struct termios.
*/
#if _HAVE_STRUCT_OLD_TERMIOS
typedef struct old_termios old_termios_t;
#else
# define OLD_NCCS NCCS
typedef struct termios old_termios_t;
#endif
/* ---- Internal function definitions ---- */
/*
* Copy a set of c_cc fields of possibly different width. If the target
* field is longer, then fill with _POSIX_VDISABLE == -1.
*/
static inline void
copy_c_cc (cc_t *to, size_t nto, const cc_t *from, size_t nfrom)
{
if (nto < nfrom)
nfrom = nto;
to = __mempcpy (to, from, nfrom * sizeof(cc_t));
if (nto > nfrom)
memset (to, _POSIX_VDISABLE, (nto - nfrom) * sizeof(cc_t));
}
/* Extract the output and input legacy speed fields from c_cflag. */
static inline tcflag_t
cbaud (tcflag_t c_cflag)
{
return c_cflag & CBAUD;
}
static inline tcflag_t
cibaud (tcflag_t c_cflag)
{
return cbaud (c_cflag >> IBSHIFT);
}
extern speed_t
___cbaud_to_speed (tcflag_t c_cflag, speed_t other)
__attribute_const__ attribute_hidden;
extern tcflag_t
___speed_to_cbaud (speed_t speed)
__attribute_const__ attribute_hidden;
extern void
___termios2_canonicalize_speeds (struct termios2 *k_termios_p)
attribute_hidden;
#endif /* TERMIOS_INTERNALS_H */

5
sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
View File

@ -2748,6 +2748,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F

5
sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
View File

@ -2767,6 +2767,11 @@ GLIBC_2.41 sched_getattr F
GLIBC_2.41 sched_setattr F
GLIBC_2.42 __inet_ntop_chk F
GLIBC_2.42 __inet_pton_chk F
GLIBC_2.42 cfgetispeed F
GLIBC_2.42 cfgetospeed F
GLIBC_2.42 cfsetispeed F
GLIBC_2.42 cfsetospeed F
GLIBC_2.42 cfsetspeed F
GLIBC_2.42 pthread_gettid_np F
GLIBC_2.42 uabs F
GLIBC_2.42 uimaxabs F