Re: More than 10% of all Fedora spec files are not POSIX sh compliant

Japheth Cleaver <cleaver@xxxxxxxxxxxxxx> · Fri, 22 Mar 2019 10:03:13 -0700

    On 3/21/2019 3:23 PM, Richard W.M.
      Jones wrote:

      So what?  On Fedora /bin/sh is bash, and bash is a fine shell.

All this nonsense of using dash for /bin/sh on Debian is IMO a
pointless bunch of make-work.

    Fedora has certainly made a lot of make-work projects over the
      last decade, under arguably more questionable reasoning.
    IMO the situation that we're in now ("Assume you're running in
      bash, but called as -/bin/sh") is a worst-of-both-worlds middle
      ground, somewhat akin to mandating webpages be written in IE
      Quirks Mode for all time. It's neither pedantically correct, nor
      flexible for users and downstreams. And the resolution from all of
      this last time remains lacking in the guarantees that an
      independent spec should have:

    http://web.archive.org/web/20150821020837/http://rpm.org/ticket/877

        https://pagure.io/packaging-committee/issue/184

      https://bugzilla.redhat.com/show_bug.cgi?id=850706

      via https://lists.fedoraproject.org/pipermail/devel/2014-October/202998.html
    RPM should IMHO indicate scriptlets are to be written in Bourne
      shell, give a 'SHOULD'-level recommendation for POSIX-correctness,
      and provide a mechanism for distros to override that default. And
      If Fedora's packaging guidelines are going to continue to state
      that bashisms are completely OK, then it should use that override
      mechanism to set the shell to "/bin/bash" explicitly.

      -jc

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