Re: "echo $((0x))" is accepted, treated as 0x0
Chet Ramey <[email protected]>
| Newsgroups | gmane.comp.shells.bash.bugs |
|---|---|
| Organization | ITS, Case Western Reserve University |
| Message-ID | <[email protected]> |
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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