Re: [Libguestfs] [libnbd PATCH v3 10/29] lib/utils: add unit tests for async-signal-safe execvpe()
On Wed, Feb 15, 2023 at 05:03:48PM -0600, Eric Blake wrote:
> +
> +# Create subdirectories for triggering non-fatal internal error conditions of
> +# execvpe(). (Almost) every subdirectory will contain one entry, called
"f".
> +#
> +# Create a directory that's empty.
> +mkdir empty
> +
> +# Create a directory with a named pipe (FIFO) in it.
> +mkdir fifo
> +mkfifo fifo/f
> +
> +# Create a directory with a non-executable file in it.
> +mkdir nxregf
> +touch nxregf/f
> +
> +# Create a symlink loop.
> +ln -s symlink symlink
Another interesting thing you might want to add to the test:
mkdir -p subdir/f
then show that PATH=...:subdir:... does not get tripped up by
subdir/f/ having the execute bit set (aka search bit since it's a
directory) but not being an executable.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org