Date: Wed, 3 Apr 2013 16:15:57 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Bruce Evans <brde@optusnet.com.au> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, Xin LI <delphij@FreeBSD.org> Subject: Re: svn commit: r249035 - head/lib/libc/stdlib Message-ID: <20130403141557.GB1349@garage.freebsd.pl> In-Reply-To: <20130403165736.F819@besplex.bde.org> References: <201304022341.r32NfL8L096954@svn.freebsd.org> <20130403165736.F819@besplex.bde.org>
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On Wed, Apr 03, 2013 at 06:04:37PM +1100, Bruce Evans wrote:
> On Tue, 2 Apr 2013, Xin LI wrote:
> > void
> > sranddev()
> > {
> > - int fd, done;
> > + int mib[2];
> > + size_t len;
> >
> > - done = 0;
> > - fd = _open("/dev/random", O_RDONLY | O_CLOEXEC, 0);
> > - if (fd >= 0) {
> > - if (_read(fd, (void *) &next, sizeof(next)) == sizeof(next))
> > - done = 1;
> > - _close(fd);
> > - }
> > -
> > - if (!done) {
> > - struct timeval tv;
> > -
> > - gettimeofday(&tv, NULL);
> > - srand((getpid() << 16) ^ tv.tv_sec ^ tv.tv_usec);
> > - }
>
> _open() and _read() are unlikely to fail, [...]
They are very likely to fail when the process is sandboxed.
--
Pawel Jakub Dawidek http://www.wheelsystems.com
FreeBSD committer http://www.FreeBSD.org
Am I Evil? Yes, I Am! http://tupytaj.pl
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