Messages in this thread | | | From | Andreas Schwab <> | Subject | Re: /proc/$pid/pagemap troubles | Date | Wed, 01 Aug 2007 00:58:21 +0200 |
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Matt Mackall <mpm@selenic.com> writes:
> On Tue, Jul 31, 2007 at 01:36:14PM -0700, Dave Hansen wrote: >> Since the pagemap code has a little header on it to help describe the >> format, I wrote a little c program to parse its output. I get some >> strange results. If I do this: >> >> fd = open("/proc/1/pagemap", O_RDONLY); >> count = read(fd, &endianness, 1); >> >> count will always be 4. > > Known bug, fixed in my pending and not-currently-working update. It > ought to return 0 for short reads.
That's not a good choice. Returning 0 means EOF, but there is actually data to be read.
Andreas.
-- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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