From: David Newall <davidn@davidnewall.com>
To: palani saravanan <busybeesaravanan0072003@yahoo.co.in>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Behavior of lseek() on a fd opened with 'RDONLY' flag, when seeking goes beyond file size.
Date: Sun, 22 Jun 2008 11:36:12 +0930 [thread overview]
Message-ID: <485DB394.1040208@davidnewall.com> (raw)
In-Reply-To: <807740.19494.qm@web8703.mail.in.yahoo.com>
palani saravanan wrote:
> Does lseek() permits -ve value as offset, with SEEK_SET mode? ...
> errno = 0;
> rd_rc = lseek(rd_fd, -10, SEEK_SET);
> returns rd_rc = -10 and errno remains 0.
>
No, lseek does not permit negative file offsets, and should return
EINVAL in your example. You may have discovered a bug. For reference,
on my system lseek returns -1 and sets errno to EINVAL, as it should.
If you're running a recent kernel it might be worth looking closer into
this; for older kernels it's probably not worth the effort.
next prev parent reply other threads:[~2008-06-22 2:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-21 15:48 Behavior of lseek() on a fd opened with 'RDONLY' flag, when seeking goes beyond file size palani saravanan
2008-06-22 2:06 ` David Newall [this message]
-- strict thread matches above, loose matches on Subject: below --
2008-06-23 8:38 palani saravanan
2008-06-17 14:06 palani saravanan
2008-06-17 14:30 ` David Newall
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