It's pretty easy to type one too many CTRL-d characters and log out of a
Bourne shell without meaning to.
The C shell has an
that won't let you log out with
So do the Korn shell and bash; use
set -o ignoreeof.
Here's a different sort of solution for the Bourne shell. When you end the shell, it asks if you're sure. If you don't answer yes, a new shell is started to replace your old one.
First, makeSave your name in an , too-you'll need it later:
TTY=`tty`; export TTY trap '. $HOME/.sh_logout; exit' 0
exec < $TTY echo "Do you really want to log out? \c" read ans case "$ans" in [Yy]*) ;; *) exec $HOME/bin/-sh ;; esac
The last line is some trickery to start a new
exec < $TTY reconnects the shell's standard input to your
Note that if your system is very slow, you may not get the reminder
message for a couple of seconds-you might forget that it's coming and
That hasn't been a problem where I've tested this.
If it is for you though, replace the
ans with a program
that times out and gives a default answer after a while.
There may be some Bourne shells that need other tricks-and others that don't
need these tricks-but this should give you an idea of what to do.