NetBSD Problem Report #53636

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Date: Fri, 28 Sep 2018 09:02:04 +0000 (UTC)
From: n54@gmx.com
Reply-To: n54@gmx.com
To: gnats-bugs@NetBSD.org
Subject: curses(3) resizeterm(3) does not ungetch(3)/unget_wch(3) KEY_RESIZE
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>Number:         53636
>Category:       lib
>Synopsis:       curses(3) resizeterm(3) does not ungetch(3)/unget_wch(3) KEY_RESIZE
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Sep 28 09:05:00 +0000 2018
>Closed-Date:    Fri Sep 28 15:10:33 +0000 2018
>Last-Modified:  Fri Sep 28 15:10:33 +0000 2018
>Originator:     Kamil Rytarowski
>Release:        NetBSD 8.99.24 amd64
>Organization:
TNF
>Environment:
NetBSD rugged 8.99.24 NetBSD 8.99.24 (GENERIC) #8: Fri Aug 31 21:55:37 CEST 2018  root@chieftec:/public/netbsd-root/sys/arch/amd64/compile/GENERIC amd64
>Description:
resizeterm(3) shall return a character KEY_RESIZE to buffer.

KEY_RESIZE shall be generated regardless of the terminal being really resized or not (new size equals the old one).

This works well in ncurses.
>How-To-Repeat:
#include <curses.h>
#include <stdio.h>
int
main(int argc, char **argv)
{
	int ch;

	initscr();
	resizeterm(10,10);
	ch = getch();
	endwin();

	printf("KEY_RESIZE = %s\n", ch == KEY_RESIZE ? "yes" : "no");

	return 0;
}

$ gcc test2.c -lcurses
$ ./a.out # waits infinitely for input
KEY_RESIZE = no
$ gcc test2.c -lncurses -L/usr/pkg/lib -Wl,-R/usr/pkg/lib -I/usr/pkg/include -I/usr/pkg/include/ncurses
$ ./a.out
KEY_RESIZE = yes

>Fix:
N/A

It's not clear whether we can use ungetch(3) inside resizeterm(3), as we might want to handle a wide character variation. It might be better to emulate this.

>Release-Note:

>Audit-Trail:

State-Changed-From-To: open->closed
State-Changed-By: kamil@NetBSD.org
State-Changed-When: Fri, 28 Sep 2018 17:10:33 +0200
State-Changed-Why:
Fixed in HEAD by roy@
To generate a diff of this commit:
cvs rdiff -u -r1.18 -r1.19 src/lib/libcurses/get_wch.c
cvs rdiff -u -r1.69 -r1.70 src/lib/libcurses/getch.c
cvs rdiff -u -r1.26 -r1.27 src/lib/libcurses/resize.c


>Unformatted:

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