How to restore terminal after curses program crashes?

[Brandon S. Allbery KB8JRR]

As quoted from <MEISSNER.91Feb17170024 at curley.osf.org> by meissner at osf.org (Michael Meissner):
+---------------
| In article <1991Feb17.164719.17328 at IRO.UMontreal.CA>
| babin at IRO.UMontreal.CA (Gilbert Babin) writes:
| 
| | I have the same problem with AIX, but whenever I type a character (any one)
| | after the crash, the shell goes into an infinite loop.
| | 
| | Any ideas on how to solve that on AIX?
| 
| When debugging applications like the above, I typically invoke it via:
| 
| 	nethack; reset_tty
| 
| where reset_tty is my shell script to reset all terminal modes to
| normal values.  For most people, you can do:
+---------------

telotech[05]:128 K$ cat /usr/lbin/oops
:
# oops - run program and restore terminal
#

g=`stty -g`
"$@"
status=$?
stty $g
tput sgr0
blockon
if [ $status -ne 0 ]; then
    echo "oops: $1: exit $status" >&2
fi
telotech[05]:129 K$ cat pers/src/blockon.c
#include <fcntl.h>

main()
{
    return fcntl(0, O_SETFL, (fcntl(0, F_GETFL, 0) & ~O_NDELAY)) == -1;
}
telotech[05]:130 K$ _

I find this invaluable for debugging:  it restores the terminal after just
about anything (short of escape sequences that whack the terminal itself, i.e.
terminals that have escape sequences to change the baud rate).

Another trick I've used is to run a "script" variant I wrote which not only
restores the terminal afterward but logs the output.  (The main variation is
that you can specify any program as the "shell".)  That, however, doesn't
work on telotech because we don't have ptys (yet)....

++Brandon
-- 
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