lkml.org 
[lkml]   [2008]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Behavior of lseek() on a fd opened with 'RDONLY' flag, when seeking goes beyond file size.
Thanks David for clarification !

I ran this program in the kernel version, 'Linux 2.6.9-42.7.ELsmp'.
However, In a recent kernel version, 'Linux 2.6.24-19 ', the error EINVAL is returned as you mentioned.

Thanks,
Saravanan
----- Original Message ----
From: David Newall <davidn@davidnewall.com>
To: palani saravanan <busybeesaravanan0072003@yahoo.co.in>
Cc: linux-kernel@vger.kernel.org
Sent: Sunday, 22 June, 2008 7:36:12 AM
Subject: Re: Behavior of lseek() on a fd opened with 'RDONLY' flag, when seeking goes beyond file size.

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.



Save all your chat conversations. Find them online at http://in.messenger.yahoo.com/webmessengerpromo.php


\
 
 \ /
  Last update: 2008-06-23 10:41    [W:0.025 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site