On 1/24/26 4:23 AM, Martin D Kealey wrote:
On Sat, 24 Jan 2026 at 12:10, Denys Vlasenko <[email protected]> wrote:Subject: "echo $((0x))" is accepted, treated as 0x0 The subject says it all.Working as intended and as documented.
Intended, yes, as a longtime extension. Documented as such, not so much.
This is so that "echo $((0x$foo))" works as intended when foo contains only hexadecimal digits. Note that the empty string complies with that requirement.
This is not a particularly strong argument. If there's a concern that $foo
might be empty, there are easy workarounds.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
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