35 lines
786 B
Perl
35 lines
786 B
Perl
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#!/usr/bin/perl
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# logger.pl: masks long meaningless output with pretty lines of dots
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# Details: 1) reads lines from STDIN and echos them on STDOUT,
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# 2) print a '.' to STDERR every $N lines.
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# 3) print a newline after a sequence of $C dots
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use strict;
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use warnings;
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# make sure all output gets displayed immediately
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$| = 1;
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# TODO: add -n and -c options w/ zero checks)
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# line and column limits
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my $N = 10;
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my $C = 72;
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# current line and column counters
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my $n = 0;
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my $c = 0;
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# read all lines from STDIN
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while (<STDIN>)
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{
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# echo line to output
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print STDOUT $_;
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# only display progress every Nth step
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next unless ++$n % $N;
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print STDERR ".";
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# wrap at column C to provide fixed-width rows of dots
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print STDERR "\n" unless ++$c % $C;
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}
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print STDERR "\n"
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