[Bug 261763] tar fails to create iso file using -a option

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 07 Feb 2022 06:33:17 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261763

            Bug ID: 261763
           Summary: tar fails to create iso file using -a option
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: mail@ozzmosis.com

FreeBSD tar(1) has the ability to create .iso files via libarchive.

This syntax works fine:

$ tar cvf myfile.iso --format iso mypath


An alternate syntax allows tar to choose the file format based on the file
extension (in this case .iso), but this fails:

$ tar acvf myfile.iso mypath

Can't use format iso9960: No such format 'iso9960'

I've sent a patch for this bug upstream:

https://github.com/libarchive/libarchive/pull/1659

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