From: Florian Weimer <fw@deneb.enyo.de>
To: Leo Liang <ycliang@andestech.com>
Cc: <libc-help@sourceware.org>,
peterlin@andestech.com, dylan@andestech.com,
alankao@andestech.com
Subject: Re: Is it reasonable to expect errno to be 0 when entering main?
Date: Tue, 27 Sep 2022 08:05:20 +0200 [thread overview]
Message-ID: <87mtalz71b.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <YzGWAjzz2OhxKTGL@ubuntu01> (Leo Liang's message of "Mon, 26 Sep 2022 12:07:30 +0000")
* Leo Liang:
> If the above program is statically-linked, and if the program is executed before "crng init done",
> the errno will not be zero when entering main.
>
> There seems to be syscall (__getrandom) before main is entered,
> and if the crng is not initialized, the syscall will fail causing the errno to be set.
> (_dl_get_origin -> __libc_malloc -> ptmalloc_init -> tcache_key_initialize -> __getrandom)
>
> So we are wondering if we should set errno to zero before entering main.
This is a bug. It only affects static linking. Would you please file
it in Bugzilla? Thanks.
next prev parent reply other threads:[~2022-09-27 6:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-26 12:07 Leo Liang
2022-09-27 6:05 ` Florian Weimer [this message]
2022-09-27 7:15 ` Leo Liang
2022-09-27 7:31 ` Florian Weimer
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