Re: [bug-ncurses] ANN: ncurses-6.4-20240120

[Thomas Dickey]

On Tue, Jan 23, 2024 at 09:10:49AM +0100, Dr. Werner Fink wrote:
> On 2024/01/22 20:23:11 -0500, Thomas Dickey wrote:
> > 
> > I checked on the command-line using "tput smkx" and before/after, used
> > "cat -v" (with ^V to make the escape character literal) and see urxvt
> > using only the normal cursor keys (\E[ rather than the application \EO).
> > 
> > Using strace, I can see that "less" is only getting the normal cursor keys.
> > 
> >     71502 19:47:50 read(3, "\33", 1)        = 1
> >     71502 19:47:52 read(3, "[", 1)          = 1
> >     71502 19:47:52 read(3, "B", 1)          = 1
> >     71502 19:47:52 read(3, "\33", 1)        = 1
> >     71502 19:47:52 read(3, "[", 1)          = 1
> >     71502 19:47:52 read(3, "B", 1)          = 1
> >     71502 19:47:52 read(3, "\33", 1)        = 1
> >     71502 19:47:53 read(3, "[", 1)          = 1
> >     71502 19:47:53 read(3, "C", 1)          = 1
> >     71502 19:47:53 read(3, "\33", 1)        = 1
> 
> Hmmm ... here we have different results for less
> 
>  read(4, "#\n# hosts         This file desc"..., 256) = 256
>  read(4, "#\n# hosts         This file desc"..., 8192) = 800
>  read(3, "\33", 1)                       = 1
>  read(3, "O", 1)                         = 1
>  read(3, "D", 1)                         = 1
>  read(3, "\33", 1)                       = 1
>  read(3, "O", 1)                         = 1
>  read(3, "A", 1)                         = 1
>  read(3, "\33", 1)                       = 1
>  read(3, "O", 1)                         = 1
>  read(3, "B", 1)                         = 1
>  read(3, "\33", 1)                       = 1
>  read(3, "O", 1)                         = 1
>  read(3, "C", 1)                         = 1
>  read(3, ":", 1)                         = 1
>  read(3, "q", 1)                         = 1
> 
> and less writes:
> 
>  write(1, "\33[?1049h\33[24;1H\33[?1h\33=\r", 23) = 23
>  write(1, "#\n# hosts         This file desc"..., 738) = 738
>  write(1, "\r\33[K \33[K:\10:", 11)      = 11
>  write(1, "\33[Kq\10q\r\33[K\33[?1l\33>\33[r\33[?1049l", 28) = 28
>  write(4, ".less-history-file:\n.search\n\"dir"..., 925) = 925
> 
> or
> 
>  \33[?1049h
>  \33[24;1H
>  \33[?1h
>  \33=
>  
> this is with
> 
>  less 643 (POSIX regular expressions)
>  Copyright (C) 1984-2023  Mark Nudelman

I could have tested with Tumbleweed (or Rawhide or Arch),
which have 643, but hadn't considered less as likely to change this detail.

        less 551 (GNU regular expressions)
        Copyright (C) 1984-2019  Mark Nudelman

-- 
Thomas E. Dickey <dickey@invisible-island.net>
https://invisible-island.net

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