[HEADS UP] perl symlinks in /usr/bin will be gone

Chuck Swiger cswiger at mac.com
Sat Jan 29 20:51:44 PST 2005

Andrew McNaughton wrote:
> On Sat, 29 Jan 2005, Chuck Swiger wrote:
[ ... ]
>> Well-behaved 3rd party scripts ought to start Perl via:
>> #! /usr/bin/env perl
>> ...so long as /usr/local/bin is in the $PATH, they should still work 
>> fine.
> I commonly use this approach, but I run into some problems with flags.
> Probably a simple gotcha someone can help with.
> Eg the following useful constructs don't work:
> #!/usr/bin/env perl -p
> #!/usr/bin/env perl -T
> #!/usr/bin/env perl -w

See "man perlrun" for some additional suggestions (and caveats), as it gives 
examples for passing -p to perl when invoked via /usr/bin/env or /bin/sh.  You 
might also try putting a "--" between the 'env' and the 'perl' to indicate the 
end of command-line option processing to env.

It's possible that taint mode cannot be invoked this way (as that needs to be 
set very early on), though.  There also seems to exist a PERL5OPT variable 
which could be set like so:

#!/usr/bin/env PERL5OPT='-w' perl

This should support -T, too, only it will zap any additional args specified 
afterwards (or so the docs say)...


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