[Bug 21968] select does not work on stdin

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Ken <kenkyee@excite.com> changed:

           What    |Removed                     |Added
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                 CC|                            |kenkyee@excite.com

--- Comment #3 from Ken <kenkyee@excite.com> 2012-11-15 21:12:51 GMT ---
This seems like a pretty bad bug to be categorized as "low" priority?!?

Use case is: people want diag/log output to a serial port, but also want to be
able to fire up a shell command processor when users put in a special
sequence...this should be a fairly common thing to do :-P

For workarounds, we've tried this:
- tried using select() then getchar()...selects apparently are broken because
it sometimes says a character is ready but it isn't, so it goes to the getchar
and locks up the entire scheduler (locking up the console task would have been
fine, but no....)-:
- tried using select() and then read() to bypass the buffering...same weird
behavior
- use direct calls to the HAL COMM_IF_GETC_TIMEOUT etc. functions...these don't
block but also returns maybe 1% of characters typed in
- tried to use configtool to tell eCos not to use that port for diag output,
but apparently, you can't just point it at /dev/null or a non-existent serial
port :-P
- tried enabling termios in eCos, but the ioctl call to get the number of
characters queued doesn't work

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