On Sat, Sep 28, 2024 at 15:17:47 +0100, Alain D D Williams wrote:
> On Sat, Sep 28, 2024 at 10:13:59AM -0400, Greg Wooledge wrote:
> > On Sat, Sep 28, 2024 at 14:53:10 +0100, Tim Woodall wrote:
> > > Is there a way in bash to guarantee that a trap gets called for cleanup
> > > in a script?
> >
> > #!/bin/bash
> > trap cleanup EXIT
> > cleanup() {
> > ...
> > }
> >
> > This works in bash -- i.e., it calls the cleanup function regardless
> > of whether the shell exits by calling "exit", or by falling off the
> > end of the script, or by receiving a fatal signal. It does NOT work in
> > /bin/sh (dash, or any other implementation). You have been warned.
>
> *ALL* scripts MUST start with a #! line as you have given above.
>
> Anyone who does not do that deserves what they get.
Yes, but many, MANY people don't understand the difference between
#!/bin/bash and #!/bin/sh.
Tim specifically asked for an answer that works "in bash", and that's
what I gave. But someone else reading this thread in the archives
might try to use this with a /bin/sh script -- and that won't work.
That's why I'm giving the warning. Even if Tim doesn't need it, there
are thousands of other people who will.
