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Date: Thu, 17 Jul 2014 20:48:11 +0200 (CEST) From: Mark Kettenis <mark.kettenis@...all.nl> To: "Theodore Ts'o" <tytso@....edu> CC: linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org, beck@...nbsd.org Subject: Re: [PATCH, RFC] random: introduce getrandom(2) system call On Thu, Jul 17, 2014, Theodore Ts'o wrote: > > The getrandom(2) system call is a superset of getentropy(2). When we > add the support for this into glibc, it won't be terribly difficult > nor annoying to drop the following in alongside the standard support > needed for any new system call: > > int getentropy(void *buf, size_t buflen) > { > int ret; > > ret = getentropy(buf, buflen, 0); > return (ret > 0) ? 0 : ret; > } I'm sure you meant to use getrandom() there ;) Since for LibreSSL we'd want a getentropy() that cannot fail the getrandom() call should use GRND_BLOCK flag. Actually it makes sense (to me) to make blocking the default behaviour and have a BRND_NONBLOCK flag. Much in the same way as you need to specify O_NONBLOCK if you want non-blocking behaviour for files. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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