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Make SA_RESETHAND conditional on its existance.
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Mon Aug 1 22:03:45 CEST 2011 on sn-devel-104
Revert 23abcd2318 and fix logic bug.
The current code loops through the event contexts, when it sees a different
one, it notifies the current one (ev) and updates ev to point to the new one.
This is dumb, because:
(1) ev starts as NULL, so this code crashes, and
(2) The final context will not be notified.
The correct fix for this is to update ev to the new one, then notify it.
Volker's fix works because we currently always have one event context.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
SA_INFO_QUEUE_COUNT *MUST* be a power of 2, in order for the ring buffer
wrap to work correctly at the 32 bit boundary. Thanks to Petr
Vandrovec <petr@vandrovec.name> for this.
When the first signal arrives, tevent_common_signal_handler() crashed: "ev" is
initialized to NULL, so the first "write(ev->pipe_fds[1], &c, 1);" dereferences
NULL.
Rusty, Tridge, please check. Also, can you tell me a bit more about the
environment you tested this in? I'd be curious to see where this survived.
Thanks,
Volker
I don't know if this is a problem in real life.
The code assumes there's only one tevent_context; all signals will notify
the first event context. That's counter-intuitive if you ever use more
than one, and there's nothing else in this code which prevents it AFAICT.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We carefully preserve the old signal handler, but we replace it before
we've set up everything; in particular, if we fail setting up the
pipe_hack we could write a NUL char to stdout (fd 0), instead of
calling the old signal handler.
Replace the signal handler as the very last thing we do.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To be completely honest, I don't quite know whether to laugh or cry at
this one:
1 + (0xFFFFFFFF & ~(s.seen - s.count))
== 1 + (~(s.seen - s.count)) # s.seen, s.count are uint32_t
== s.count - s.seen # -A == ~A + 1
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Based on a patch submitted by Petr Vandrovec <petr@vandrovec.name>.
Multiple pending signals with siginfo_t's weren't being handled correctly
leading to smbd abort with kernel oplock signals.
Jeremy
The samba3 aio code requires lp_max_mux() with a default of 50
and the samba3 linux oplock code requires 100.
May we could make the size dynamic later.
metze
