mirror of git://sourceware.org/git/glibc.git
5f138519eb
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> |
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| .. | ||
| bits | ||
| powerpc32 | ||
| powerpc64 | ||
| sys | ||
| Implies | ||
| Makefile | ||
| Versions | ||
| cancellation-pc-check.h | ||
| configure | ||
| configure.ac | ||
| cpu-features.c | ||
| cpu-features.h | ||
| dl-auxv.h | ||
| dl-cache.h | ||
| dl-hwcap-info.c | ||
| dl-hwcap-info.h | ||
| dl-support.c | ||
| elision-conf.c | ||
| elision-conf.h | ||
| elision-lock.c | ||
| elision-timed.c | ||
| elision-trylock.c | ||
| elision-unlock.c | ||
| get_timebase_freq.c | ||
| gettimeofday.c | ||
| htm.h | ||
| internal-ioctl.h | ||
| ipc_priv.h | ||
| kernel-features.h | ||
| kernel_sigaction.h | ||
| ldd-rewrite.sed | ||
| libc-start.c | ||
| libc-start.h | ||
| libc-vdso.h | ||
| libpthread-compat.c | ||
| nldbl-abi.h | ||
| pointer_guard.h | ||
| pthread_attr_setstack.c | ||
| pthread_attr_setstacksize.c | ||
| readelflib.c | ||
| rt-sysdep.c | ||
| rtld_static_init.h | ||
| sigcontextinfo.h | ||
| socket-constants-time64.h | ||
| struct_kernel_shmid64_ds.h | ||
| syscall.S | ||
| syscall_cancel.S | ||
| sysconf.c | ||
| sysdep.c | ||
| sysdep.h | ||
| termios_arch.h | ||
| test-gettimebasefreq-static.c | ||
| test-gettimebasefreq.c | ||
| test-powerpc-linux-sysconf.c | ||
| time.c | ||
| tst-hwcap-tunables.c | ||
| xstatver.h | ||