Re: how much are "historic" issues with test / [ still an issue

[Greg Wooledge]

On Tue, May 25, 2021 at 06:16:20PM +0200, Christoph Anton Mitterer wrote:
> - anything else >= 4 might is ambiguous, and one should use the forms
> with multiple test(s) and combine those via ||, &&, and the shell's ( )
> (i.e. the unquoted parentheses that cause subshell evaluation).

Use { ; } instead of ( ) for this.  There's no need to fork subshells.

if { test firstthing || test secondthing; } &&
   { test thirdthing || test fourththing; }; then
        body
fi

Or, use [[ ]] if you're writing for bash.