As I understand it, <> operator will open all items in @ARGV allowing
one
to do a shell command line of
perl.script file1 file2 file3
and inside perl.script you only need
while (<>) { ... syntax to read all the files on the command line.
<> will also open STDIN if the perl script is invoked from a pipe, such
as
ls | perl.script
So, 1. from within perl.script, how can one tell if the input stream is
coming from
STDIN or a file that was opened by <>?
2. If input stream is not coming from STDIN, but a file, how can one
tell which file is the current file (assuming multiple files were
specified on the command line)?
Thanks.
- Paul
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