NetNews Usenet Archive 1993 #1/NN_1993_1.iso/spool/comp/sys/hp/14773

Internet Message Format | 1993-01-12 | 1.5 KB

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From: [e-mail]
Newsgroups: comp.sys.hp,comp.lang.c
Subject: capturing a keystroke
Message-ID: <[e-mail]>
Date: 7 Jan 93 14:59:46 EST
Lines: 28

Hi,

I am attempting to capture one keystroke at a time, using C, from various
UNIX systems, at the moment a Hewlett-Packard 9000 (Apollo) Series 700
running HP-UX. I am follwing the instructions given in the TTY section
of the manuals (like clearing ICANON and setting MIN and TIME).

Everything is working fine, except for the arrow keys. When I enter a
single character (say an 'R'), I get the expected character code. However,
when I enter an arrow key, the cursor simply moves on the screen and no
character code is returned. The HP manual states that in LOCAL MODE
the system displays control codes but does not execute them. It states that,
if you press the left arrow key, the terminal displays an escape character
on the screen but does not perform the cursor left function. I put the
machine in LOCAL MODE and the cursor still moves.

I also tried using the XmitFnctc() escape sequence which states that it
controls the sequences generated by keys such as the arrow keys.

I know that I could use curses, but I am curious as to why I cannot
capture the arrow keys.

I am also interested in capturing other non-alphanumeric keys.

Thanks,


Matt