Incompatible clipboard format between 32bit and 64bit cygwin

Sun Sep 26 19:09:08 GMT 2021

On 9/26/21, Thomas Wolff wrote:
> Am 26.09.2021 um 20:37 schrieb Thomas Wolff:
>> Am 26.09.2021 um 11:50 schrieb Mark Geisert:
>>> Hi Takashi,
>>> Takashi Yano via Cygwin wrote:
>>>> I noticed that cygwin clipboard is not compatible
>>>> between 32bit and 64bit cygwin.
>>>> If I run 'echo AAAAAAAA > /dev/clipboard' in 32bit cygwin,
>>>> and run 'cat /dev/clipboard' in 64bit cygwin, this result in
>>>> cat: /dev/clipboard: Bad address
>>>> This is because the structure
>>>> typedef struct
>>>> {
>>>>    timestruc_t   timestamp;
>>>>    size_t    len;
>>>>    char      data[1];
>>>> } cygcb_t;
>>>> defined in has different size.
>>>> Is this the known issue?
>>> I doubt anybody has ever tried what you did.
>> I have and it failed; I just didn't find it important enough to report
>> it here... Thanks for the plan to fix it.
>>> I have been testing getclip and putclip between 32- and 64-bit
>>> environments, but neglected to test Cygwin-internal clipboard format
>>> that prepends cygcb_t to the user-supplied data.
> As we're at it, what's the purpose of a cygwin-internal clipboard format
> at all?


Maybe I'm not understanding the question, but I put a question to this
list ~3 years ago about right-click/paste into a mintty window being
**really** slow and the answer was to use getclip:
$ time d2u < /dev/clipboard > hosts-3.txt

real    0m11.372s
user    0m3.749s
sys     0m6.984s

$ time cat /dev/clipboard | tr -d '\r' > hosts-2.txt

real    0m4.405s
user    0m0.124s
sys     0m3.577s

$ time getclip -u > hosts.txt

real    0m0.734s
user    0m0.031s
sys     0m0.031s


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