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From: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
To: musl@lists.openwall.com, Yuri Kanivetsky <yuri.kanivetsky@gmail.com>
Subject: Re: [musl] faccessat() always return EPERM
Date: Sat, 24 Jul 2021 19:36:39 -0400	[thread overview]
Message-ID: <1627169764.w6a53kypz8.none@localhost> (raw)
In-Reply-To: <20210724014021.GM13220@brightrain.aerifal.cx>

Excerpts from Rich Felker's message of July 23, 2021 9:40 pm:
> On Sat, Jul 24, 2021 at 04:16:25AM +0300, Yuri Kanivetsky wrote:
>> Hi,
>> 
>> I'm not sure that it has something to do with musl. But experienced in
>> a Alpine Linux docker container (ruby:2.6-alpine3.14) on Debian 9 or
>> 10. I can't reproduce it with Alpine Linux 3.13 (container) or Debian
>> 8 (host).
>> 
>> For example, the following program outputs -1:
>> 
>> #include <stdio.h>
>> #include <fcntl.h>
>> #include <unistd.h>
>> 
>> int main()
>> {
>>     int r;
>>     r = faccessat(AT_FDCWD, "/", R_OK, AT_EACCESS);
>>     printf("%i", r);
>>     return 0;
>> }
>> 
>> I believe whatever is passed as the second parameter, it would return -1.
>> 
>> As a result at least irb and bundler doesn't work. Is this some sort
>> of binary incompatibility with Linux kernel?
> 
> No, it's almost surely Docker blocking the operation with the wrong
> error code (EPERM):
> 
> https://github.com/opencontainers/runc/issues/2151
> 
> I'm not sure what the status on getting fix deployed is. It might go
> away if the host running Docker can upgrade.
> 
> Rich
> 

https://wiki.alpinelinux.org/wiki/Release_Notes_for_Alpine_3.14.0#faccessat2

  parent reply	other threads:[~2021-07-25 10:55 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-24  1:16 Yuri Kanivetsky
2021-07-24  1:40 ` Rich Felker
2021-07-24  5:56   ` Rich Felker
2021-07-24 23:36   ` Alex Xu (Hello71) [this message]
2021-07-27  4:34     ` Yuri Kanivetsky
2021-07-24  1:56 ` Wolf

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