/[sysadmin-cookbook]/bin/block-devices
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /bin/block-devices

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Revision 13 - (show annotations)
Fri May 1 12:11:44 2009 UTC (14 years, 10 months ago) by dpavlin
File size: 1150 byte(s)
added with-partitions so we can quickly list devices for fdisk

1 #!/usr/bin/perl
2
3 =head1 block-devices
4
5 Display all block devices on system
6
7 hdparm -t `block-devices`
8
9 sfdisk -l `block-devices with-partitions`
10
11 =cut
12
13 use warnings;
14 use strict;
15 #use autodie;
16
17 my $with_partitions = { true => 1 } if grep { m/with.?partitions/ } @ARGV;
18
19 open(my $proc, '<', '/proc/partitions');
20
21 my @header;
22 my $last_device = '';
23
24 my $name2col;
25 sub col {
26 my ( $name, $line ) = @_;
27 if ( ! $name2col ) {
28 $name2col->{ $header[$_] } = $_ foreach 0 .. $#header;
29 }
30 $line =~ s/^\s+// || die "expected line to start with space: $_\n";
31 my @c = split(/\s+/, $line, $#header + 1 );
32 return $c[ $name2col->{ $name } ];
33 }
34
35 while(<$proc>) {
36 chomp;
37 if ( ! @header ) {
38 @header = split(/\s+/, $_);
39 next;
40 }
41 next unless $_;
42
43 my $device = col 'name', $_;
44 my $device_like_last = substr( $device, 0, length($last_device) );
45 if ( $last_device && $device_like_last eq $last_device ) {
46 if ( $with_partitions ) {
47 print "/dev/$device_like_last\n" if ! $with_partitions->{ $device_like_last }++;
48 } else {
49 warn "# partition $device\n";
50 }
51 } else {
52 print "/dev/$device\n" unless $with_partitions;
53 $last_device = $device;
54 }
55 }
56

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