Can't Read /cygdrive/c in snapshots from 1108 on (unknown windows error 122)

["D. N. Knisely" <dnk at lucent dot com>]

Please excuse me if this has been reported previously, but I can't seem to
find it mentioned in the archives.

Starting with the 20031108 snapshot on (for each snapshot after that), I
cannot read the "c:/" or "/cygdrive/c" drive.  If I restore to any version
of cygwin1.dll earlier that that, I get the normal expected behavior.  An
strace is excerpted below.  It seems to go astray at "unknown windows error
122":

"326   58973 [main] ls 3428 seterrno_from_win_error:
/netrel/src/cygwin-snapsho
t-20031119-1/winsup/cygwin/security.cc:1101 windows error 122"

The same results come from any program that tried to enumerate the
/cygdrive/c directory (e.g., perl, bash filename expansion, etc.).

This problem definitely started only with the recent snapshots (which I need
to run because of the select() 100% CPU problem that is fixed in these
snapshots).

D. Knisely
----------------------
strace excerpt:

$ strace ls /cygdrive/c >trace.out
ls: /cygdrive/c: Permission denied

trace output:
[.]
  298   57280 [main] ls 3428 symlink_info::check: not a symlink
   58   57338 [main] ls 3428 symlink_info::check: 0 = symlink.check (c:\,
0x22F5
30) (0x2000020)
   60   57398 [main] ls 3428 path_conv::check: root_dir(c:\),
this->path(c:\), s
et_has_acls(8)
   64   57462 [main] ls 3428 build_fh_pc: fh 0x61681384
   56   57518 [main] ls 3428 stat_worker: (/cygdrive/c, 0x100223E8, 1,
0x6168138
4), file_attributes 54
   66   57584 [main] ls 3428 fhandler_base::open: (c:\, 0x110000) query_open
1
  119   57703 [main] ls 3428 fhandler_base::open: 0x70C = CreateFile (c:\,
0x0,
0x7, 0x22FC80, 0x3, 0x2000081, 0)
   61   57764 [main] ls 3428 fhandler_base::set_flags: flags 0x110000,
supplied_
bin 0x20000
   57   57821 [main] ls 3428 fhandler_base::set_flags: O_TEXT/O_BINARY set
in fl
ags 0x10000
   56   57877 [main] ls 3428 fhandler_base::set_flags: filemode set to
binary
   56   57933 [main] ls 3428 fhandler_base::open: 1 = fhandler_base::open
(c:\,
0x110000)
   57   57990 [main] ls 3428 fhandler_base::open_fs: 1 =
fhandler_disk_file::ope
n (c:\, 0x110000)
   81   58071 [main] ls 3428 fhandler_base::fstat_by_handle: 1 =
GetFileInformat
ionByHandle (c:\, 1804)
  514   58585 [main] ls 3428 get_file_attribute: file: c:\
   62   58647 [main] ls 3428 read_sd: file = c:\
  326   58973 [main] ls 3428 seterrno_from_win_error:
/netrel/src/cygwin-snapsho
t-20031119-1/winsup/cygwin/security.cc:1101 windows error 122
   66   59039 [main] ls 3428 geterrno_from_win_error: unknown windows error
122,
 setting errno to 13
   59   59098 [main] ls 3428 get_nt_attribute: read_sd Win32 error 122
   57   59155 [main] ls 3428 fhandler_base::fstat_helper: 0 = fstat (,
0x100223E
8) st_atime=3FBE682B st_size=0, st_mode=0x4000, st_ino=5, sizeof=96
   62   59217 [main] ls 3428 fhandler_base::close: closing '/cygdrive/c'
handle
0x70C
   78   59295 [main] ls 3428 stat_worker: 0 = (/cygdrive/c, 0x100223E8)
  518   59813 [main] ls 3428 normalize_posix_path: src /cygdrive/c
   59   59872 [main] ls 3428 normalize_posix_path: /cygdrive/c =
normalize_posix
_path (/cygdrive/c)
   58   59930 [main] ls 3428 mount_info::conv_to_win32_path:
conv_to_win32_path
(/cygdrive/c)
   61   59991 [main] ls 3428 mount_info::cygdrive_win32_path: src
'/cygdrive/c',
 dst 'c:\'
   57   60048 [main] ls 3428 set_flags: flags: text (0x2000000)
  159   60207 [main] ls 3428 mount_info::conv_to_win32_path: src_path
/cygdrive/
c, dst c:\, flags 0x2000020, rc 0
  266   60473 [main] ls 3428 symlink_info::check: not a symlink
   58   60531 [main] ls 3428 symlink_info::check: 0 = symlink.check (c:\,
0x22F6
20) (0x2000020)
   61   60592 [main] ls 3428 path_conv::check: root_dir(c:\),
this->path(c:\), s
et_has_acls(8)
   65   60657 [main] ls 3428 build_fh_pc: fh 0x61681384
  329   60986 [main] ls 3428 read_sd: file = c:\
  141   61127 [main] ls 3428 seterrno_from_win_error:
/netrel/src/cygwin-snapsho
t-20031119-1/winsup/cygwin/security.cc:1101 windows error 122
   63   61190 [main] ls 3428 geterrno_from_win_error: unknown windows error
122,
 setting errno to 13
   58   61248 [main] ls 3428 check_file_access: flags 4, ret -1
  225   61473 [main] ls 3428 writev: writev (2, 0x22DD40, 1)
   60   61533 [main] ls 3428 fhandler_console::write: 22DDD0, 4
   56   61589 [main] ls 3428 fhandler_console::write: at 108(l) state is 0
  733   62322 [main] ls 3428 fhandler_console::write: 4 = write_console
(,..4)
   67   62389 [main] ls 3428 writev: 4 = write (2, 0x22DD40, 1), errno 13
   68   62457 [main] ls 3428 writev: writev (2, 0x22DD60, 1)
   57   62514 [main] ls 3428 fhandler_console::write: 22DDF0, 11
   55   62569 [main] ls 3428 fhandler_console::write: at 47(/) state is 0
  142   62711 [main] ls 3428 fhandler_console::write: 11 = write_console
(,..11)

   60   62771 [main] ls 3428 writev: 11 = write (2, 0x22DD60, 1), errno 13
   69   62840 [main] ls 3428 writev: writev (2, 0x22DD40, 1)
   57   62897 [main] ls 3428 fhandler_console::write: 22DDD0, 19
   72   62969 [main] ls 3428 fhandler_console::write: at 58(:) state is 0
  130   63099 [main] ls 3428 fhandler_console::write: 19 = write_console
(,..19)

   59   63158 [main] ls 3428 writev: 19 = write (2, 0x22DD40, 1), errno 13
   61   63219 [main] ls 3428 writev: writev (2, 0x22F930, 1)
   58   63277 [main] ls 3428 fhandler_console::write: 610E639F, 1
   55   63332 [main] ls 3428 fhandler_console::write: at 10(0x20) state is 0
  154   63486 [main] ls 3428 fhandler_console::write: 1 = write_console
(,..1)
   58   63544 [main] ls 3428 writev: 1 = write (2, 0x22F930, 1), errno 13
  182   63726 [main] ls 3428 do_exit: do_exit (1)


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