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Re: 2 way pipe?

by etcshadow (Priest)
on Nov 15, 2004 at 22:32 UTC ( #407991=note: print w/replies, xml ) Need Help??

in reply to 2 way pipe?

In addition to all of the above, have a look at IPC::Run. It's a very simple and intuitive interface for doing all the easy things, while at the same time being a pretty good interface for doing the hard things, too. For example:
use IPC::Run qw( run ); # just a silly command to execute in another process, to demonstrate # how input, output and error all relate my $command = q<perl -lpe 's/b/t/; warn qq{Oh, no! A z in "$_"! What + a world, what a world!\n} if /z/'>; # but that way is sensitive to what shell you are using, # (whether it is ok to use ' or " to quote in the shell) # this way is shell-independant: $command = ['perl', '-lpe', 's/b/t/; warn qq{Oh, no! A z in "$_"! Wh +at a world, what a world!\n} if /z/']; my ($in, $out, $err); $in = "foo\nbar\nbaz\n"; run $command, \$in, \$out, \$err;
would give you "foo\ntar\ntaz\n"; in $out (the output of the program) and "Oh, no!  A z in "taz"!  What a world, what a world!\n" in $err (the STDERR of the program).
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