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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| htl | ||
| hurd | ||
| i386 | ||
| include | ||
| sys | ||
| x86 | ||
| x86_64 | ||
| Makefile | ||
| Subdirs | ||
| _strerror.c | ||
| adjtime.c | ||
| clock_gettime.c | ||
| clock_nanosleep.c | ||
| configure | ||
| configure.ac | ||
| getloadavg.c | ||
| getpagesize.c | ||
| getsysstats.c | ||
| libc-lock.h | ||
| libmachuser.abilist | ||
| mach_rpc.h | ||
| mprotect.c | ||
| msync.c | ||
| munmap.c | ||
| pagecopy.h | ||
| readonly-area-fallback.c | ||
| sched_yield.c | ||
| sleep.c | ||
| strerror_l.c | ||
| sysdep.h | ||
| thread_state.h | ||
| usleep.c | ||
| xpg-strerror.c | ||