Re: [Crash-utility] less(1) TERM requirements; man page update [was Re: crash CPU bound waiting for user response]
Chip Coldwell wrote:
On Mon, 9 Jul 2007, D. Hugh Redelmeier wrote:
>| From: Dave Anderson <anderson(a)redhat.com>
>|
>| Chip Coldwell wrote:
>| > On Tue, 3 Jul 2007, D. Hugh Redelmeier wrote:
>
>| > >==> It does not say in what way the terminal is not fully
>| > >functional. That seems like a bug.
>
>| > Well, the issue is that the emacs terminal emulator does not fully
>| > support the [n]curses escape sequences needed to position the cursor
>| > for your pager (e.g. less).
>
>The whole point of termcap/terminfo is to tame the whacky world of
>terminal diversity. There is nothing "wrong" with a terminal that
>does not have features needed by less(1).
Fair enough, but then this is a bug in less: it is refusing to run on
a terminal that has nothing "wrong" with it.
Chip
There are a few terminal capability checks that "less" makes on the
termcap file, and if any of them are missing, it sets missing_cap,
and later on spews that message/forced-input-sequence -- for example:
sc_eol_clear = ltgetstr("ce", &sp);
if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
{
missing_cap = 1;
sc_eol_clear = "";
}
sc_eos_clear = ltgetstr("cd", &sp);
if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear ==
'\0'))
{
missing_cap = 1;
sc_eos_clear = "";
}
sc_clear = ltgetstr("cl", &sp);
if (sc_clear == NULL || *sc_clear == '\0')
{
missing_cap = 1;
sc_clear = "\n\n";
}