From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: [PATCH] Add getrandom syscall wrapper function
Date: Mon, 1 Jan 2018 21:14:03 -0500 [thread overview]
Message-ID: <20180102021403.GK1627@brightrain.aerifal.cx> (raw)
In-Reply-To: <20180101220354.GI1627@brightrain.aerifal.cx>
On Mon, Jan 01, 2018 at 05:03:54PM -0500, Rich Felker wrote:
> > > and we've
> > > discussed in the past but never reached any conclusion on whether
> > > there should be a fallback when the syscall doesn't exist (running on
> > > old kernel).
> >
> > glibc does not have a fallback for this syscall there was a long
> > discussion about this, see here: https://lwn.net/Articles/711013/
> > As they never found a good solution for their fallback. I think musl
> > should also not provide a fallback.
Interesting that the biggest issue seems to have been about using file
descriptors as the fallback. That's something I never considered using
in musl since we have AT_RANDOM and sysctl on ancient kernels that
lack it. There are a small number of kernels between when sysctl
started spamming syslog with deprecation warnings and when AT_RANDOM
was added but I don't really care about those; it still works anyway.
Rich
next prev parent reply other threads:[~2018-01-02 2:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-01 20:31 Hauke Mehrtens
2018-01-01 20:47 ` Rich Felker
2018-01-01 21:51 ` Hauke Mehrtens
2018-01-01 22:03 ` Rich Felker
2018-01-02 2:14 ` Rich Felker [this message]
2018-01-02 15:27 ` Szabolcs Nagy
2018-01-02 18:09 ` Rich Felker
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