[PATCH] ash: avoid GLIBC'ism %m

[Denys Vlasenko]

On Wed, Jul 19, 2017 at 3:47 AM, Jody Bruchon <jody at jodybruchon.com> wrote:
> On 2017-07-18 9:15 PM, Kang-Che Sung wrote:
>>
>> On Wed, Jul 19, 2017 at 2:11 AM, Markus Gothe <nietzsche at lysator.liu.se>
>> wrote:
>>>
>>> Actually last time I checked ‘%m’ is POSIX contrary to glibc’s deprecated
>>> '%a’. However, I agree that it should not be used since at least uClibc can
>>> be built without support for it.
>>
>> How come %m is POSIX when I didn't see any mention of it in this page?
>> http://pubs.opengroup.org/onlinepubs/9699919799/functions/fprintf.html
>
> It does not appear to be part of POSIX or the Single UNIX Specification. The
> glibc man page (as of 2016-12-12) even indicates that it is a glibc-specific
> extension:
>
> *m *(Glibc extension; supported by uClibc and musl.) Print output of
> /strerror(errno)/. No argument is required.

This sounds like every libc has already conceded to implementing it.

Let's benefit from it then?