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Date: Thu, 29 May 2008 18:47:55 +0200
From: "Giovanni Maruzzelli" <gmaruzz DOT lists AT gmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: serial ports not visible with 1.7 under Vista
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\\\\.\\com6 gives me  "Device or resource busy", while all other com*
give me "not existing".
So, it is definitely better. But do not yet works. Opening and
read/writing to it with native win32 API works (readfile etc)

following is the relevant strace:

   67   36177 [main] ciapa 756 open: open (\\.\com6, 0x4002)^M
   54   36231 [main] ciapa 756 normalize_posix_path: src \\.\com6^M
   45   36276 [main] ciapa 756 normalize_win32_path: \\.\com6 =
normalize_win32_path (\\.\com6)^M
   44   36320 [main] ciapa 756 mount_info::conv_to_win32_path:
conv_to_win32_path (//./com6)^M
   43   36363 [main] ciapa 756 mount_info::conv_to_win32_path:
src_path //./com6, dst \\.\com6, flags 0x0, rc 0^M
 2742   39105 [main] ciapa 756 symlink_info::check: 0xC0000010 =
NtQueryInformationFile (\??\com6)^M
  140   39245 [main] ciapa 756 symlink_info::check: 0xC0000033 =
NtOpenFile(\??\)^M
  109   39354 [main] ciapa 756 symlink_info::check: not a symlink^M
   41   39395 [main] ciapa 756 symlink_info::check: 0 = symlink.check
(\\.\com6, 0x223990) (0x0)^M
   41   39436 [main] ciapa 756 path_conv::check: this->path(\\.\com6),
has_acls(0)^M
   72   39508 [main] ciapa 756 build_fh_pc: fh 0x6125271C^M
   49   39557 [main] ciapa 756 fhandler_base::open: (\??\com6, 0x104002)^M
  123   39680 [main] ciapa 756 seterrno_from_win_error:
/netrel/src/cygwin-1.7.0-16/winsup/cygwin/fhandler.cc:631 windows
error 32^M
   45   39725 [main] ciapa 756 geterrno_from_win_error: windows error
32 == errno 16^M
   42   39767 [main] ciapa 756 __set_errno: void
seterrno_from_win_error(const char*, int, DWORD):313 val 16^M
   43   39810 [main] ciapa 756 fhandler_base::open: C0000043 =
NtCreateFile (0x0, C0100000, \??\com6, io, NULL, 0, 7, 1, 4420, NULL,
0)^M
  108   39918 [main] ciapa 756 fhandler_base::open: 0 =
fhandler_base::open (\??\com6, 0x104002)^M
  104   40022 [main] ciapa 756 fhandler_base::open_fs: 0 =
fhandler_disk_file::open (\??\com6, 0x4002)^M
  108   40130 [main] ciapa 756 open: -1 = open (\\.\com6, 0x4002)^M


On Thu, May 29, 2008 at 6:15 PM, Dave Korn <dave DOT korn AT artimi DOT com> wrote:
> Giovanni Maruzzelli wrote on 29 May 2008 16:41:
>
>> Thanks a lot Dave!
>>
>> Seems that it is looking for a \Device\Serial5
>
>  Ouch.  That's a problem.  Not all serial devices use the same name format.
>
>  Although it's not strictly supported, you might be able to work around it
> by using "\\\\.\\com6" instead.
>
>
>    cheers,
>      DaveK
> --
> Can't think of a witty .sigline today....
>
>
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