musl - Re: getpass() feature test macro

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Message-ID: <aHBe00QWQ4lfJL72@cloudsdale.the-delta.net.eu.org>
Date: Fri, 11 Jul 2025 02:46:11 +0200
From: "Haelwenn (lanodan) Monnier" <contact@...ktivis.me>
To: musl@...ts.openwall.com
Cc: Thorsten Glaser <tg@...bsd.de>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: getpass() feature test macro

[2025-07-09 19:56:14-0400] Rich Felker:
>On Thu, Jul 10, 2025 at 12:20:42AM +0200, Thorsten Glaser wrote:
>> On Wed, 9 Jul 2025, Thomas Petazzoni wrote:
>>
>> >               _XOPEN_SOURCE && ! (_POSIX_C_SOURCE >= 200112L)
>>
>> This looks like a bug: a search for getpass in POSIX returns
>> no match.
>
>It was probably in an older version of POSIX (possibly XSI shaded, not
>sure). Generally we don't provide full compat with older versions of
>the standards, since it turns into a mess of version conditions and
>programs using a mix of older stuff are usually better off just with
>_DEFAULT_SOURCE (alias _BSD_SOURCE). There are a few exceptions for
>stuff that's still widely used like gethostby* that recent standards
>removed, but I'm not sure it would make sense to treat getpass special
>like that being that it's a rarely used and IIRC removed a long time
>ago.
>
>Rich

getpass() was in SUSv2 but already marked legacy: https://pubs.opengroup.org/onlinepubs/007908799/xsh/getpass.html

SUSv2 uses _POSIX_C_SOURCE 199506L: https://pubs.opengroup.org/onlinepubs/007908799/xsh/compilation.html

And expectedly, SUSv3 removed it: https://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap01.html

Which uses _POSIX_C_SOURCE 200112L: https://pubs.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_02.html

Best Regards

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