1.5.12 and the latest snapshots allow unlinking a file contrary to POSIX rules. The addition of CYGWIN=traverse was not enough to fix this issue. Unlink is required to fail with EACCES if the file is contained in a directory without write permission.
$ mkdir a $ touch a/b $ chmod a-w a $ touch a/c # Correctly fails touch: cannot touch `a/c': Permission denied $ rm a/b # Oops, should have failed $ Furthermore, unlink should touch the ctime of the containing directory, and the ctime of the unlink'd file (if hard links remain after the unlink succeeds). In general, open(O_CREAT), link, rename, mkdir, and rmdir should touch the ctime of the containing directory when the directory's contents change. $ stat . File: `.' Size: 12288 Blocks: 12 IO Block: 1024 directory Device: 10292fb1h/271134641d Inode: 3390366094479868980 Links: 13 Access: (0777/drwxrwxrwx) Uid: ( 544/Administrators) Gid: (10513/Domain Users) Access: 2005-02-28 15:25:36.990625000 -0700 Modify: 2005-02-28 15:25:32.350000000 -0700 Change: 2005-02-28 15:24:58.756250000 -0700 $ mkdir a # Oops, ctime of . not affected $ touch b # Oops, ctime of . not affected $ ln b c # Oops, ctime of . not affected (but correctly touches b and c) $ stat c File: `c' Size: 0 Blocks: 0 IO Block: 1024 regular empty file Device: 10292fb1h/271134641d Inode: 2251799813814789 Links: 1 Access: (0666/-rw-rw-rw-) Uid: (22382/ eblake) Gid: (10513/Domain Users) Access: 2005-02-28 15:28:25.584375000 -0700 Modify: 2005-02-28 15:28:25.584375000 -0700 Change: 2005-02-28 15:28:28.225000000 -0700 $ rmdir a # Oops, ctime of . not affected $ rm b # Oops, ctime of . and c not affected $ mv c a # Oops, ctime of . not affected $ stat . a File: `.' Size: 12288 Blocks: 12 IO Block: 1024 directory Device: 10292fb1h/271134641d Inode: 3390366094479868980 Links: 13 Access: (0777/drwxrwxrwx) Uid: ( 544/Administrators) Gid: (10513/Domain Users) Access: 2005-02-28 15:28:40.850000000 -0700 Modify: 2005-02-28 15:28:40.850000000 -0700 Change: 2005-02-28 15:24:58.756250000 -0700 File: `a' Size: 0 Blocks: 0 IO Block: 1024 regular empty file Device: 10292fb1h/271134641d Inode: 2251799813814789 Links: 1 Access: (0666/-rw-rw-rw-) Uid: (22382/ eblake) Gid: (10513/Domain Users) Access: 2005-02-28 15:28:25.584375000 -0700 Modify: 2005-02-28 15:28:25.584375000 -0700 Change: 2005-02-28 15:28:28.225000000 -0700 -- Eric Blake -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
