I have a Makefile which performs "rm -f -r" as part of a clean target.
On Win7 with 1.7.5-1 this can fail with:
rm -f -r win32
rm: cannot remove directory `win32': Directory not empty
I tried 1.7.7-1 but the problem still seems to be there.
Doing a little digging, I find that /bin/rm calls
unlinkat("win32/dll"), which eventually calls unlink_nt().
A short time later, /bin/rm calls unlink_at("win32") and
fails at check_dir_not_empty() because it finds the following
entries::
413407 [main] rm 3612 check_dir_not_empty: File name: 2 0x2E 0x610E 0x10 "."
413493 [main] rm 3612 check_dir_not_empty: File name: 4 0x2E 0x2E 0x18 ".."
413574 [main] rm 3612 check_dir_not_empty: File name: 6 0x64 0x6C 0x6C "dll"
Huh? Wasn't this the directory that was just deleted?
Taking a look in the directory after the fact shows that the parent directory
appears to be empty :
W:> dir win32
Volume in drive W is OS
Volume Serial Number is C0E0-BBEE
Directory of W:\cerberus\acl\col_\ato\win32
13/09/2010 01:57 PM <DIR> .
13/09/2010 01:57 PM <DIR> ..
0 File(s) 0 bytes
2 Dir(s) 392,720,297,984 bytes free
Hmm ... my reading of unlink_nt() is that the directory "win32/dll"
is deleted by setting FileDispositionInformation via NtSetFileInformation().
Since the file entry seems to be found during the subsequent
check_dir_not_empty()
call when trying to delete the parent directory, is some form
of explicit synchronisation required when deleting
the child "win32/dll" to be sure that the deletion is
actually complete?
Earl
--
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
