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WebSVN – planix.SVN – Blame – /os/branches/feature-vt/sys/src/libc/9sys/truerand.c – Rev 2

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#include <u.h>
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#include <libc.h>
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ulong
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truerand(void)
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{
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	ulong x;
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	static int randfd = -1;
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	if(randfd < 0)
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		randfd = open("/dev/random", OREAD|OCEXEC);
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	if(randfd < 0)
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		sysfatal("can't open /dev/random");
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	if(read(randfd, &x, sizeof(x)) != sizeof(x))
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		sysfatal("can't read /dev/random");
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	return x;
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}