Re: index-pack died on pread

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On 7/26/07, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
On Thu, 26 Jul 2007, Robin Rosenberg wrote:
>
> Does cygwin have the same pread problem then.. ? after make NO_PREAD=1 with 1.5.2.4
> clone works.

Interesting.

It's true that pread() is used much less than normal reads, and maybe the
cygwin pread() is indeed broken. But it's intriguing how apparently both
HP-UX and Cygwin are showing the same breakage.

Maybe because neither _has_ POSIX pread? This is cygwin's pread, I believe:

http://cygwin.com/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_disk_file.cc?rev=1.225&content-type=text/x-cvsweb-markup&cvsroot=src

Windows has means to implement it natively, but the interface is so ugly
(see OVERLAPPED, if interested), that it is no wonder Cygwin chose to
just use lseek.
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