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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=485DB394.1040208@davidnewall.com \
--to=davidn@davidnewall.com \
--cc=busybeesaravanan0072003@yahoo.co.in \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.