22 Jul
2008
22 Jul
'08
7:38 a.m.
Bert Thomas schrieb:
John Floren schreef:
Actually, he sets the
TERM variable; that's what the 'adm3a' in the
getty line above is supposed to do.
This will then by exported to the login shell.
I rather think the problem is that contemporary linux versions attempt
to be clever, in running additional /etc/profile or /etc/login.csh etc.
files which nowadays no longer have any clue that one might connect
through a rather dumb terminal. I have seen such profile files that
simple replace whatever setting there is with its own idea (TERM=linux,
TERM=ansi) or alike, without any further check. Knowledge about former
best practices have largely degraded with modern Linux use - who the
heck will run anything below KDE on 1920x1600 in 4M-color modes anyway? ;-(
The advice is correct: check what TERM, LANG, LC_* etc. will tell you,
and be sure that it will fall back to 7 bit ASCII modes (not UTF). I
have also seen some "color ls" which implicitly assumes ANSI colors
without checking the terminal.
Yet, even with this, it has been an eternal problem that
termcap/terminfo settings were and are grossly buggy and untested; so
depending on the terminal settings and the used curses/ncurses version,
the few codes for an adm3a may no longer be sufficient to display even a
modest vi correctly, leave alone such great implementations (not!) of
text windowing software which imply PC line drawing characters >0x80
(it might already be ncurses that is the culprit).
--
Holger
I pulled out my ADM-3A today in an effort to
stave off studying and
homework and such; hooked it up to my Debian box, only to find that
there isn't really very good support for it under Debian. I use this
line in my inittab:
T0:23:respawn:/sbin/getty -h -L ttyS0 9600 adm3a
and while I can log in, vim for example looks TERRIBLE, ls tries to do
color and fails miserably, etc.
When I log on to one of the Solaris machines on campus via SSH, they
handle things gracefully. ls works right, vi is excellent.
Is the difference in our terminfo files, or what? I'm not really sure
how these things work so I'm hoping somebody can help me figure out
what's up here, because I'd like my Debian computer to play nicely
with the terminal.
I'm no expert on this topic, but I think you need to adapt the TERM
environment variable. The curses library uses this to determine what
control codes to send to your terminal to draw the screen.