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Perl File Handling FileHandle : Name for I/O connection STDIN, STDOUT, STDERR are given Other Files –Open(FILEHANDLE, “somename”); –FILEHANDLE is a name. - ppt download
open(my $pipe, "-|") doesn't change Perl's STDOUT in the child, only low-level fd 1 · Issue #19215 · Perl/perl5 · GitHub
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