From: Brian Inglis <Brian.Inglis@SystematicSw.ab.ca>
To: cygwin@cygwin.com
Subject: Re: Incompatible clipboard format between 32bit and 64bit cygwin
Date: Sun, 26 Sep 2021 14:46:56 -0600 [thread overview]
Message-ID: <8e3c276a-78ce-7d8a-3d5a-6692eba060fd@SystematicSw.ab.ca> (raw)
In-Reply-To: <CAD8GWsvZP00wAW_UTQ3O3PDhiJvdf2KxPabaaynGU_LfD30u8w@mail.gmail.com>
On 2021-09-26 13:09, Lee via Cygwin wrote:
> 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:
>>>> 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 fhandler_clipboard.cc 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?
> speed?
> 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
I'm not so worried about speed, except where that stops clipboard
contents being updated quickly for consistency, but I ended up
explicitly using /dev/clipboard under Cygwin for consistent
interoperation with gvim and lxterminal under Linux VMs and gvim and
mintty in Cygwin.
It would be good to test any changes across systems, or I could do so if
the developer(s? - Mark?) don't run the environments to do so.
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]
next prev parent reply other threads:[~2021-09-26 20:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-26 1:33 Takashi Yano
2021-09-26 9:50 ` Mark Geisert
2021-09-26 18:37 ` Thomas Wolff
2021-09-26 18:41 ` Thomas Wolff
2021-09-26 19:09 ` Lee
2021-09-26 20:46 ` Brian Inglis [this message]
2021-09-28 4:49 ` Mark Geisert
2021-09-28 5:22 ` Brian Inglis
2021-09-28 6:19 ` Takashi Yano
2021-09-28 6:46 ` Brian Inglis
2021-09-28 8:13 ` Takashi Yano
2021-09-28 17:11 ` Mark Geisert
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=8e3c276a-78ce-7d8a-3d5a-6692eba060fd@SystematicSw.ab.ca \
--to=brian.inglis@systematicsw.ab.ca \
--cc=cygwin@cygwin.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).