termios: Consolidate Baud Rate Selection definitions (BZ#23783)
This patch consolidates the termios symbolic constants used for baud rates
selection used along with speed_t on its own header. The Linux generic
implementation values match the kernel UAPI and each architecture with
deviate values have their own implementation (in this case alpha and
powerpc).
No semantic change is expected, checked on a build against x86_64-linux-gnu,
alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.
[BZ #23783]
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
termios-baud.h.
* sysdeps/unix/sysv/linux/bits/termios-baud.h: New file.
* sysdeps/unix/sysv/linux/alpha/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/termios.h (B57600, B115200,
B230400, B460800, B500000, B576000, B921600, B1000000, B1152000,
B1500000, B2000000, B2500000, B3000000, B3500000, B4000000,
__MAX_BAUD): Move to termios-baud.h.
[__USE_MISC] (CBAUD, CBAUDEX): Likewise.
* sysdeps/unix/sysv/linux/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
2018-10-09 17:35:03 +00:00
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/* termios baud rate selection definitions. Linux/generic version.
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2025-01-01 18:14:45 +00:00
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Copyright (C) 2019-2025 Free Software Foundation, Inc.
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termios: Consolidate Baud Rate Selection definitions (BZ#23783)
This patch consolidates the termios symbolic constants used for baud rates
selection used along with speed_t on its own header. The Linux generic
implementation values match the kernel UAPI and each architecture with
deviate values have their own implementation (in this case alpha and
powerpc).
No semantic change is expected, checked on a build against x86_64-linux-gnu,
alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.
[BZ #23783]
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
termios-baud.h.
* sysdeps/unix/sysv/linux/bits/termios-baud.h: New file.
* sysdeps/unix/sysv/linux/alpha/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/termios.h (B57600, B115200,
B230400, B460800, B500000, B576000, B921600, B1000000, B1152000,
B1500000, B2000000, B2500000, B3000000, B3500000, B4000000,
__MAX_BAUD): Move to termios-baud.h.
[__USE_MISC] (CBAUD, CBAUDEX): Likewise.
* sysdeps/unix/sysv/linux/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
2018-10-09 17:35:03 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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termios: Consolidate Baud Rate Selection definitions (BZ#23783)
This patch consolidates the termios symbolic constants used for baud rates
selection used along with speed_t on its own header. The Linux generic
implementation values match the kernel UAPI and each architecture with
deviate values have their own implementation (in this case alpha and
powerpc).
No semantic change is expected, checked on a build against x86_64-linux-gnu,
alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.
[BZ #23783]
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
termios-baud.h.
* sysdeps/unix/sysv/linux/bits/termios-baud.h: New file.
* sysdeps/unix/sysv/linux/alpha/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/termios.h (B57600, B115200,
B230400, B460800, B500000, B576000, B921600, B1000000, B1152000,
B1500000, B2000000, B2500000, B3000000, B3500000, B4000000,
__MAX_BAUD): Move to termios-baud.h.
[__USE_MISC] (CBAUD, CBAUDEX): Likewise.
* sysdeps/unix/sysv/linux/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
2018-10-09 17:35:03 +00:00
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#ifndef _TERMIOS_H
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# error "Never include <bits/termios-baud.h> directly; use <termios.h> instead."
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#endif
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linux: implement arbitrary and split speeds in termios
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>
2025-06-12 01:35:36 +00:00
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#define B0 0U
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#define B50 50U
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#define B75 75U
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#define B110 110U
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#define B134 134U
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#define B150 150U
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#define B200 200U
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#define B300 300U
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#define B600 600U
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#define B1200 1200U
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#define B1800 1800U
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#define B2400 2400U
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#define B4800 4800U
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#define B7200 7200U
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#define B9600 9600U
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#define B14400 14400U
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#define B19200 19200U
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#define B28800 28800U
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#define B33600 33600U
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#define B38400 38400U
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#define B57600 57600U
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#define B76800 76800U
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#define B115200 115200U
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#define B153600 153600U
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#define B230400 230400U
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#define B307200 307200U
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#define B460800 460800U
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#define B500000 500000U
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#define B576000 576000U
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#define B614400 614400U
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#define B921600 921600U
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#define B1000000 1000000U
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#define B1152000 1152000U
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#define B1500000 1500000U
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#define B2000000 2000000U
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#define B2500000 2500000U
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#define B3000000 3000000U
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#define B3500000 3500000U
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#define B4000000 4000000U
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termios: Consolidate Baud Rate Selection definitions (BZ#23783)
This patch consolidates the termios symbolic constants used for baud rates
selection used along with speed_t on its own header. The Linux generic
implementation values match the kernel UAPI and each architecture with
deviate values have their own implementation (in this case alpha and
powerpc).
No semantic change is expected, checked on a build against x86_64-linux-gnu,
alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.
[BZ #23783]
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
termios-baud.h.
* sysdeps/unix/sysv/linux/bits/termios-baud.h: New file.
* sysdeps/unix/sysv/linux/alpha/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios-baud.h: Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/termios.h (B57600, B115200,
B230400, B460800, B500000, B576000, B921600, B1000000, B1152000,
B1500000, B2000000, B2500000, B3000000, B3500000, B4000000,
__MAX_BAUD): Move to termios-baud.h.
[__USE_MISC] (CBAUD, CBAUDEX): Likewise.
* sysdeps/unix/sysv/linux/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
2018-10-09 17:35:03 +00:00
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linux: implement arbitrary and split speeds in termios
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>
2025-06-12 01:35:36 +00:00
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#define __MAX_BAUD 4294967295U
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