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#!/usr/bin/perl |
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|
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=head1 block-devices |
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|
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Display all block devices on system |
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|
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hdparm -t `block-devices` |
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|
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sfdisk -l `block-devices with-partitions` |
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|
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=cut |
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|
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use warnings; |
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use strict; |
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#use autodie; |
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|
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my $with_partitions = { true => 1 } if grep { m/with.?partitions/ } @ARGV; |
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|
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open(my $proc, '<', '/proc/partitions'); |
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|
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my @header; |
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my $last_device = ''; |
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|
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my $name2col; |
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sub col { |
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my ( $name, $line ) = @_; |
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if ( ! $name2col ) { |
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$name2col->{ $header[$_] } = $_ foreach 0 .. $#header; |
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} |
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$line =~ s/^\s+// || die "expected line to start with space: $_\n"; |
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my @c = split(/\s+/, $line, $#header + 1 ); |
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return $c[ $name2col->{ $name } ]; |
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} |
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|
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while(<$proc>) { |
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chomp; |
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if ( ! @header ) { |
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@header = split(/\s+/, $_); |
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next; |
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} |
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next unless $_; |
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|
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my $device = col 'name', $_; |
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my $device_like_last = substr( $device, 0, length($last_device) ); |
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if ( $last_device && $device_like_last eq $last_device ) { |
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if ( $with_partitions ) { |
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print "/dev/$device_like_last\n" if ! $with_partitions->{ $device_like_last }++; |
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} else { |
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warn "# partition $device\n"; |
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} |
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} else { |
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print "/dev/$device\n" unless $with_partitions; |
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$last_device = $device; |
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} |
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} |
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