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| author | H. Peter Anvin (Intel) <hpa@zytor.com> | 2025-06-11 18:35:42 -0700 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2025-06-17 09:11:38 -0300 |
| commit | 5f138519ebdf88e1fc5395d65df0b780dd07829a (patch) | |
| tree | d345a40b0b70a95075433bb63da1110c3927dd31 /sysdeps/unix/sysv/linux/alpha | |
| parent | 98aeca349ae081d745978d7fe9bc5762137f8ece (diff) | |
| download | glibc-5f138519ebdf88e1fc5395d65df0b780dd07829a.zip glibc-5f138519ebdf88e1fc5395d65df0b780dd07829a.tar.gz glibc-5f138519ebdf88e1fc5395d65df0b780dd07829a.tar.bz2 | |
termios: add new baud_t interface, defined to be explicitly numeric
Add an explicitly numeric interface for baudrate setting. For glibc,
this only announces what is a fair accompli, but this is a plausible
way forward for standardization, and may be possible to infill on
non-compliant systems. The POSIX committee has stated:
[https://www.austingroupbugs.net/view.php?id=1916#c7135]
A future version of this standard is expected to add at least
the following symbolic constants for use as values of objects
of type speed_t: B57600, B115200, B230400, B460800, and
B921600.
Implementations are encouraged to propose additional
interfaces which will make it possible to set and query a
wider range of speeds than just those enumerated by the
constants beginning with B. If a set of common interfaces
emerges between several implementations, a future version of
this standard will likely add those interfaces.
This is exactly that interface.
The use of the term "baud" is due to the need to have a term
contrasting "speed", and it is already well established as a legacy
term -- including in the names of the legacy Bxxx
constants. Futhermore, it *is* valid from the point of view that the
termios interface fundamentally emulates an RS-232 serial port as far
as the application software is concerned.
The documentation states that for the current version of glibc,
speed_t == baud_t, but explicitly declares that this may not be the
case in the future.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/libc.abilist | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist index 1e3f278..4b5736a 100644 --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist @@ -3099,9 +3099,14 @@ 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 cfgetibaud F GLIBC_2.42 cfgetispeed F +GLIBC_2.42 cfgetobaud F GLIBC_2.42 cfgetospeed F +GLIBC_2.42 cfsetbaud F +GLIBC_2.42 cfsetibaud F GLIBC_2.42 cfsetispeed F +GLIBC_2.42 cfsetobaud F GLIBC_2.42 cfsetospeed F GLIBC_2.42 cfsetspeed F GLIBC_2.42 pthread_gettid_np F |