Re: Man page doc for SEEK_DATA/SEEK_HOLE

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On 09/19/2011 10:57 AM, Eric Blake wrote:
On 09/18/2011 01:07 AM, Michael Kerrisk wrote:
+
+.BR SEEK_DATA
+and
+.BR SEEK_HOLE
+are nonstandard extensions also present in Solaris.

Looks good to me, but you may also want to link to the proposed wording for mandating SEEK_HOLE/SEEK_DATA in the eventual POSIX Issue 8 (POSIX 2008 is Issue 7):
http://austingroupbugs.net/view.php?id=415

Also, it seems a shame that the kernel can fail with EINVAL instead of properly emulating SEEK_HOLE and SEEK_DATA even on file systems with no underlying support for reporting holes.


Why do you say that? If I am reading generic_file_llseek_unlocked()
correctly, the default behavior is treat offset < i_size as data.
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