tcgetwinsize() and tcsetwinsize()

tcgetwinsize() and tcsetwinsize()

[Soumendra Ganguly]

Hello. According to
https://www.austingroupbugs.net/view.php?id=1151#c3856, tcgetwinsize()
and tcsetwinsize() for getting/setting tty winsize are going to appear
in POSIX.1 issue 8. NetBSD already has them:

1. http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/termios/tcgetwinsize.c?only_with_tag=MAIN
2. http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/termios/tcsetwinsize.c?only_with_tag=MAIN

Also, musl-libc has them. Would implementations of these functions
using ioctl()+TIOCGWINSZ?TIOCSWINSZ be welcome?

Thank you.
Soumendra

Re: tcgetwinsize() and tcsetwinsize()

[Florian Weimer]

* Soumendra Ganguly via Libc-help:

> https://www.austingroupbugs.net/view.php?id=1151#c3856, tcgetwinsize()
> and tcsetwinsize() for getting/setting tty winsize are going to appear
> in POSIX.1 issue 8. NetBSD already has them:
>
> 1. http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/termios/tcgetwinsize.c?only_with_tag=MAIN
> 2. http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/termios/tcsetwinsize.c?only_with_tag=MAIN
>
> Also, musl-libc has them. Would implementations of these functions
> using ioctl()+TIOCGWINSZ?TIOCSWINSZ be welcome?

An addition would seem reasonable.  The proposed POSIX change appears
to be compatible with what we have today.

Please note that glibc patches of this size will need copyright
assignment:

  <https://sourceware.org/glibc/wiki/Contribution%20checklist#FSF_copyright_assignment>

If your contribution is potentially covered by your university, the
FSF will likely ask for a copyright disclaimer or assignment from them
as well.

Unfortunately, I have no view into the FSF copyright assignment
process, but I will be able to help you to get your patch ready for
integration into glibc.

Re: tcgetwinsize() and tcsetwinsize()

[Soumendra Ganguly]

Sir,
    Thank you for the prompt reply. I will sign the copyright
agreement; the university is not involved in this in any way.

On 12/13/20, Florian Weimer <fw@deneb.enyo.de> wrote:
> * Soumendra Ganguly via Libc-help:
>
>> https://urldefense.com/v3/__https://www.austingroupbugs.net/view.php?id=1151*c3856__;Iw!!KwNVnqRv!RnSGEQ2iUrHEx6eRkz_4mpgwbp-w4dc8VQXkzWh3BY9nLh_d9wbDxg-Y7Q5uJXb8$
>> , tcgetwinsize()
>> and tcsetwinsize() for getting/setting tty winsize are going to appear
>> in POSIX.1 issue 8. NetBSD already has them:
>>
>> 1.
>> https://urldefense.com/v3/__http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/termios/tcgetwinsize.c?only_with_tag=MAIN__;!!KwNVnqRv!RnSGEQ2iUrHEx6eRkz_4mpgwbp-w4dc8VQXkzWh3BY9nLh_d9wbDxg-Y7Wzl4Tds$
>>
>> 2.
>> https://urldefense.com/v3/__http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/termios/tcsetwinsize.c?only_with_tag=MAIN__;!!KwNVnqRv!RnSGEQ2iUrHEx6eRkz_4mpgwbp-w4dc8VQXkzWh3BY9nLh_d9wbDxg-Y7dEzxq5f$
>>
>>
>> Also, musl-libc has them. Would implementations of these functions
>> using ioctl()+TIOCGWINSZ?TIOCSWINSZ be welcome?
>
> An addition would seem reasonable.  The proposed POSIX change appears
> to be compatible with what we have today.
>
> Please note that glibc patches of this size will need copyright
> assignment:
>
>
> <https://urldefense.com/v3/__https://sourceware.org/glibc/wiki/Contribution*20checklist*FSF_copyright_assignment__;JSM!!KwNVnqRv!RnSGEQ2iUrHEx6eRkz_4mpgwbp-w4dc8VQXkzWh3BY9nLh_d9wbDxg-Y7Xft-lqA$
>>
>
> If your contribution is potentially covered by your university, the
> FSF will likely ask for a copyright disclaimer or assignment from them
> as well.
>
> Unfortunately, I have no view into the FSF copyright assignment
> process, but I will be able to help you to get your patch ready for
> integration into glibc.
>