Hi!
----
[Splitting discussion for a possible |libc::wordexp()| migration to
ksh93 off the main thread...]
Peter Memishian wrote:
[snip]
> > > lib/libc/{sparc,sparcv9,amd64,i386}/Makefile.com:
> > >
> > > * It's a shame this has to be duplicated across all four
> Makefiles,
> > > but I guess that's status quo with the libc Makefiles.
> >
> > Well, we could declare the old version of |libc::wordexp()| obsolete
> > (which will be an intersting ARC case because the current
> > |libc::wordexp()| has seperate codepaths for normal and XPG4 behaviour
> > (the difference is whether /usr/bin/ksh or /usr/xpog4/bin/sh is used)
> > while the new one only supports XPG4 behaviour. The question is whether
> > there is a difference between both shells when word expansion is done...
> > I can't even imagine a testcase to probe for the difference between
> > /usr/bin/ksh and /usr/xpg4/bin/sh and therefore I assume the difference
> > is more or less "zero" (except that you could use shell-specfic
> > variables and check $0 for the name of the shell - but AFAIK no consumer
> > will do that...)) and this flag will disappear... :-)
>
> OK :-)
Slightly offtopic: Is there any "precendent" for such an ARC case ?
Basically the switch would break backwards-compatiblity because the old
code had seperate codepaths for "normal" and "XPG4" but AFAIK there is
almost no difference in "word expansion" between /usr/bin/ksh (used by
the "normal" codepath) and /usr/xpg4/bin/sh (used by the "POSIX"
codepath) ... or better: I can't imagine a testcase which would expose a
difference between both modes and the number of consumers is tiny (AFAIK
SMF/inetd and dhcpd use |libc::wordexp()| in OS/Net and a seach via
"Koders" and "Google Code Search" shows lots of copies of the glibc
|wordexp()| implementation but no consumers) and none of them will be
affected by a switch of |libc::wordexp()| to ksh93 which would "lock"
the behaviour to the "XPG4" codepath...
----
Bye,
Roland
--
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