On 7/8/24 12:18 PM, Chris Torek wrote:
The `test` command has AND and OR operators of its own,
which give `-a` (AND) higher precedence than `-o` (OR). In
addition, `$#` can only expand to an integer value, so quotes
are not required, and the whole thing can be written as:
if test $# -ne 1 -a $# -ne 3 -o -z "$1"
(which is what I would do myself, unless I wanted a separate
error message for an empty "$1"). It's fine as is though.
Hi,
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html states
"The XSI extensions specifying the -a and -o binary primaries and the
'(' and ')' operators have been marked obsolescent."
suggesting "&&" being preferred over "-a".
Chris
