From: EBo <ebo@sandien.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] read(2) problem on p9p?
Date: Fri, 13 Aug 2010 11:46:54 -0600 [thread overview]
Message-ID: <79d728670c7d6a03e9acc7fb3c756777@swcp.com> (raw)
In-Reply-To: <6c97cc385db794bd736f6ea0cd505989@plug.quanstro.net>
> you haven't explanined what the arguments to test do, but
> you appear to be mixing strcmp idioms. i think you wish either
>
> test(strcmp(test_str, buf) == 0, 4, "check value\n");
>
> or
> test(!strcmp(test_str, buf), 4, "check value\n");
Right. Sorry... The declaration for test is:
void test(int bool, int space, ...);
where bool is the test case to prepend a pass/fail message in front of the
used defined message printed by vfprint. Space is a pretty printing addon
that prints n spaces before the print message -- it makes it easier to
read.
The test you pointed out was a bad test. Thanks for catching that!
The real problem was the test before it:
ret = read(dtf, buf, strlen buf);
test(strlen(tst_str)==ret,4, "read back from var\n");
Read actually correctly reads the file correctly (which the next test
verifies), but since I asked it to read 1K bytes when the message length is
only 39, read returns 0 instead of 39 and sets the file's offset to the end
of file as I would have expected.
I also should add if I did not before, this is on plan9port.
EBo --
next prev parent reply other threads:[~2010-08-13 17:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-13 16:54 EBo
2010-08-13 17:16 ` [9fans] " erik quanstrom
2010-08-13 17:46 ` EBo [this message]
2010-08-13 17:51 ` Skip Tavakkolian
2010-08-13 18:14 ` Russ Cox
2010-08-13 18:35 ` EBo
2010-08-13 18:46 ` Russ Cox
2010-08-13 19:03 ` EBo
2010-08-13 18:16 ` EBo
2010-08-13 18:58 ` erik quanstrom
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