sigaction in libpthread returns wrong old handler

[Ulrich Drepper]

Andreas Schwab <schwab@suse.de> writes:

> When sigaction in libpthread is called the first time for a signal we
> don't know whether the old signal handler is SIG_DFL or SIG_IGN, so we
> must return the value that the kernel reports.

Thanks, I've applied this.  But it would really help if we could get
test cases.

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