Re: bash uses tmp files for inter-process communication instead of pipes?

[Linda Walsh]

Greg Wooledge wrote:
> netdev_pat=... # (and other variable assignments)
> (cd "$sysnet" &&
> for ifname in ...; do
>     hwaddr=$(<"$ifname"/address)
>     act_hw2if[$hwaddr]="$ifname"
>     act_if2hw[$ifname]="$hwaddr"
> done)

Except that either act_hw2if + pair were just assigned to
in the sub process that was meant to isolate the change
of directory from the rest of the program,
OR
we aren't in the right directory when we do the reads.

Either way, they code as you have suggested won't work
without overcoming another set of side effects.