On 8/1/05, Jesper Juhl <[EMAIL PROTECTED]> wrote:
> I'm not quite sure you are right Ulrich. Given this little bit from
> SUSv3 about SA_RESTART in the page describing sigaction (
> http://www.opengroup.org/onlinepubs/009695399/functions/sigaction.html
> ) :
It's not an official SA_RESTART since t
On 8/1/05, Dave Airlie <[EMAIL PROTECTED]> wrote:
> >
> > However, there is in fact no bug here. The test program is just wrong.
> > sigwait returns zero or an error number, as POSIX specifies. Conversely,
> > sigtimedwait and sigwaitinfo either return 0 or set errno and return -1.
> > It is odd
> But sigwait is not a function specified with an EINTR error number.
> As I said before, this does not mean that EINTR cannot be returned.
> But it will create havoc among programs and it causes undefined
> behavior wrt to SA_RESTART. I think it is best to not have any
> function for which EINT
On 7/31/05, Roland McGrath <[EMAIL PROTECTED]> wrote:
> However, there is in fact no bug here. The test program is just wrong.
> sigwait returns zero or an error number, as POSIX specifies.
No question, no error is detected incorrectly.
But sigwait is not a function specified with an EINTR error
>
> However, there is in fact no bug here. The test program is just wrong.
> sigwait returns zero or an error number, as POSIX specifies. Conversely,
> sigtimedwait and sigwaitinfo either return 0 or set errno and return -1.
> It is odd that the interfaces of related functions differ in this way
The problem is not really "when straced", but when strace attaches. In
fact, it's not even "when PTRACE_ATTACH'd". It's actually the implicit
SIGSTOP that PTRACE_ATTACH causes. If you simply suspend and resume the
program (with SIGSTOP or C-z), you get the same result. So this report is
more pr
On 7/30/05, Sanjoy Mahajan <[EMAIL PROTECTED]> wrote:
> so the return value should not be 4 (or the docs are not right).
This return value simply indicated EINTR (sigwait does not set errno,
read the docs).
The kernel simply doesn't restart the function in case of a signal.
It should do this, th
Pavel Machek wrote:
> If you think it is a linux bug, can you produce small test case doing
> just the sigwait, and post it on l-k with big title "sigwait() breaks
> when straced, and on suspend"?
Here it is. I haven't tested the sigwait()+suspend lately, since
suspen
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