Re: [PATCH v3 08/19] write_or_die: raise SIGPIPE when we get EPIPE

From: Jonathan Nieder <jrnieder@gmail.com>
Date: Feb 20, 2013, 22:06 UTC
Message-ID: <20130220220637.GC24236@google.com>
In-Reply-To: <20130220220359.GA1417@sigill.intra.peff.net>

Jeff King wrote:

> On Wed, Feb 20, 2013 at 02:01:14PM -0800, Jonathan Nieder wrote:

Show 13 quoted lines

>>>> How about
>>>>
>>>> 		die("BUG: another thread changed SIGPIPE handling behind my back!");
>>>>
>>>> to make it easier to find and fix such problems?
>>>
>>> You mean for the "should never happen" bit, not the first part, right? I
>>> actually wonder if we should simply exit(141) in the first place. That
>>> is shell exit-code for SIGPIPE death already (so it's what our
>>> run_command would show us, and what anybody running us through shell
>>> would see).
>>
>> Yes, for the "should never happen" part.

[...]

> I don't mind adding a "BUG: " message like you described, but we should
> still try to exit(141) as the backup, since that is the shell-equivalent
> code to the SIGPIPE signal death.

If you want. :)

I think caring about graceful degradation of behavior in the case of an assertion failure is overengineering, but it's mostly harmless.