Thank you guys for quick answers,
What if I want to print a "..." and calculate the percentage and amount of
currently downloaded size during the download process? (wget style), should
I create another process to do that? or is there any other alternative? (I
will choose the later).
I believe you're looking for $|, the autoflush variable. If set to a non-zero value, it causes perl to flush output after every print call, even without a \n. Try watching both of these one-liners execute to see what I'm talking about:
perl -e 'foreach (1..3) { print time, " "; sleep 3; } print "\n";'
perl -e '$| = 1; foreach (1..3) { print time, " "; sleep 3; } print "\n";'
Hope that helps.
James
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