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Message-ID: <CAKpSnp+gh4honG-ujnU6xrSfX7MsTx3ecGvQYfZRx0sFJGNnCw@mail.gmail.com>
Date: Mon, 4 Jul 2016 02:49:28 -0700
From: Jorge Almeida <jjalmeida@...il.com>
To: musl@...ts.openwall.com, Jorge Almeida <jjalmeida@...il.com>
Subject: Re: abort() PID 1
On Mon, Jul 4, 2016 at 2:31 AM, Szabolcs Nagy <nsz@...t70.net> wrote:
> * Jorge Almeida <jjalmeida@...il.com> [2016-07-04 01:09:32 -0700]:
>> What I thought I understood:
>>
>> - the kernel will not deliver any signal to process 1, unless a signal
>> handler for that particular signal has been installed
>>
>
> not all signals behave that way.
Would you elaborate on that? (links?)
>
> this is raise(SIGABRT), abort is different.
Quotes in my first message say it's the same:
>>
>> (http://pubs.opengroup.org/onlinepubs/9699919799/)
>>
>> "The SIGABRT signal shall be sent to the calling process as if by
>> means of raise() with the argument SIGABRT."
>>
>
> it also says
>
> "The abort() function shall cause abnormal process termination
> to occur, unless the signal SIGABRT is being caught and the
> signal handler does not return."
>
> and
>
> "The abort() function shall not return."
>
This is where I see an inconsistency...
>
> there is no inconsistency.
>
> abort should raise(SIGABRT) and it should terminate the process.
>
> (normally there should be an abort syscall provided by the kernel,
> but linux does not have it.)
>
>> So, can one trust the man pages?
>
> not always, use the standard for standard interfaces.
Too bad...
Thanks
Jorge
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