/[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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Annotation of /bin/block-devices

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Revision 13 - (hide annotations)
Fri May 1 12:11:44 2009 UTC (13 years, 7 months ago) by dpavlin
File size: 1150 byte(s)
added with-partitions so we can quickly list devices for fdisk

1 dpavlin 12 #!/usr/bin/perl
2    
3     =head1 block-devices
4    
5     Display all block devices on system
6    
7     hdparm -t `block-devices`
8    
9 dpavlin 13 sfdisk -l `block-devices with-partitions`
10    
11 dpavlin 12 =cut
12    
13     use warnings;
14     use strict;
15     #use autodie;
16    
17 dpavlin 13 my $with_partitions = { true => 1 } if grep { m/with.?partitions/ } @ARGV;
18    
19 dpavlin 12 open(my $proc, '<', '/proc/partitions');
20    
21     my @header;
22 dpavlin 13 my $last_device = '';
23 dpavlin 12
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 dpavlin 13 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 $device\n";
50     }
51 dpavlin 12 } else {
52 dpavlin 13 print "/dev/$device\n" unless $with_partitions;
53     $last_device = $device;
54 dpavlin 12 }
55     }
56    

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