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Date: Mon, 28 Jan 2019 23:50:38 -0200
From: Adhemerval Zanella <adhemerval.zanella@...aro.org>
To: musl@...ts.openwall.com
Subject: Re: fdopendir (BUG?)
On 28/01/2019 19:33, Jorge Almeida wrote:
> On Mon, Jan 28, 2019 at 8:31 PM Adhemerval Zanella
> <adhemerval.zanella@...aro.org> wrote:
>>
>>
>>
>
>>> the Linux man-pages project") It says:
>>> Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
>>>
>>> fdopendir():
>>> Since glibc 2.10:
>>> _POSIX_C_SOURCE >= 200809L
>>> Before glibc 2.10:
>>> _GNU_SOURCE
>>>
>>> I have glibc-2.27
>>>
>>
>> This is for *fdopendir* declaration, the *O_PATH* flag is documented by
>> open.2 and it defines:
>>
>> ---
>> CONFORMING TO
>> open(), creat() SVr4, 4.3BSD, POSIX.1-2001, POSIX.1-2008.
>>
>> openat(): POSIX.1-2008.
>>
>> The O_DIRECT, O_NOATIME, O_PATH, and O_TMPFILE flags are Linux-specific.
>> One must define _GNU_SOURCE to obtain their definitions.
>> ---
>
> OK, got it. Still, it compiles against musl, even without _GNU_SOURCE
>
Because musl defines O_EXEC as O_PATH which I am not entirely sure it is
correct for Linux. As Joseph has noted on glibc BZ#18222 [1] we need
kernel agreement the kernel will reserve this value and the proper
semantic it will implement (even if this is similar to O_PATH).
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=18228
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