bug#15970: [Bug-tar] Crash in gettext() after fork() on Mac OS X

[Pádraig Brady]

On 11/26/2013 04:55 AM, Paul Eggert wrote:
> Pádraig Brady wrote:
> 
>> How about the attached instead that just uses
>> a somewhat degraded but simpler error() equivalent.
> 
> That looks safe, though it could be simplified:
> use inttostr instead of repeating its body,

Hah, I was thinking this must be done somewhere else :)

> and since !!p == !!errnum there's no need
> to have those duplicate conditions.

I meant to use (p || errstr), but let's assume
errstr is present, so yes we can then remove condition.

> Plus, just use STDERR_FILENO rather than
> fiddling with fileno (stderr),

done

> and async_safe_error
> should be _Noreturn and should unconditionally call
> _exit.

fair enough. I changed the name so to async_safe_die()

> And, I wouldn't bother looking at dup2's
> return value, any more than we look at close's.

Updated patch attached.

thanks!
Pádraig.

sort-async-safe.patch
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