Alan, I think the docs are incomplete, and $() should work in AIX 5.3, too.
On Wed, Aug 1, 2012 at 3:33 PM, Alan Robertson <[email protected]> wrote: > On 08/01/2012 03:12 PM, David Klann wrote: > > Hi Jeffrey, > > > > On Wed, 1 Aug 2012 13:02:10 -0600 you coerced some electrons to say: > > > >> David, > >> > >> > >>>> I didn't intend for there to be any bash-isms. The only things I > >>>> know of that I use are $(echo hi) and similar - which I didn't > >>>> think were bash-only. If they are, then I should get rid of them. > >>> I haven't checked lately, but /bin/sh (as in "Bourne") doesn't do > >>> $(). Should probably stick to backticks for command substitution. > >> > >> Depends on your definition of "lately." :-) > >> > >> $() became a requirement for /bin/sh implementations in IEEE > >> 1003.2-1992. That standard codified existing practice, so you'll find > >> $() in every /bin/sh that's under the drinking age. > >> > >> (Me, I stopped using backticks for command substitution in the late > >> 80's.) > >> > >> On even older, non-POSIX Unix-y boxes -- Unix v7 boxes, say -- we'd > >> still have a problem. Are such boxes a target? > >> > >> Boxes that lack /bin/sh, like out-of-the-box Windows machines, are > >> also a problem. > > This is what I get for relying on <Dominant-Search-Engine> for answers > > to such historical questions. Having not used a UNIX(R) system in a > > while, I believed the first search hit for "bourne shell command > > substitution -bash". The link is to http://ibm.co/Nmy3ca which appears > > to be for AIX 5.3. Sigh, it looks like 7.1 is the current release from > > IBM. > > > > Thanks for the additional perspective and reference Jeffrey! > > > Some customers still run AIX 5.3 - but I think it goes out of support > soon (or maybe already has). > > -- > Alan Robertson <[email protected]> - @OSSAlanR > > "Openness is the foundation and preservative of friendship... Let me > claim from you at all times your undisguised opinions." - William > Wilberforce > _______________________________________________ > Assimilation mailing list - Discovery-Driven Monitoring > [email protected] > http://lists.community.tummy.com/cgi-bin/mailman/listinfo/assimilation > http://assimmon.org/ > -- Jeffrey Haemer <[email protected]> 720-837-8908 [cell], http://seejeffrun.blogspot.com [blog], http://www.youtube.com/user/goyishekop [vlog] *פרייהייט? דאס איז יאַנג דינען וואָרט.*
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