struct dirent.d_reclen

[Eric Blake <ebb9 at byu dot net>]

Wish list (probably post 7.1): As long as we are making struct dirent more like 
Linux with the recent addition of d_type, we should probably also burn two of 
the remaining 3 __d_unused1 bytes to declare unsigned short d_reclen, whose 
value is always strlen(d_name), so that applications could get by with fewer 
strlen calls.  Coreutils ls would certainly benefit from this optimization.

P.S. This is an interesting thread related to struct dirent - it shows that for 
once, cygwin is doing something more POSIX-y than Linux (ie. POSIX 2008 added a 
requirement that readdir d_ino always match stat st_ino, even for mount 
points), and therefore Cygwin actually gets to benefit from a coreutils 
optimization when Linux doesn't!

http://lists.gnu.org/archive/html/bug-coreutils/2009-08/msg00320.html
http://lists.gnu.org/archive/html/bug-coreutils/2009-08/msg00331.html
http://marc.info/?l=linux-kernel&m=125181054102075

-- 
Eric Blake



--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple