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#!/usr/bin/perl -c |
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package Device::Moose::SCSI; |
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{ |
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$Device::Moose::SCSI::AUTHORITY = "cpan:potatogim"; |
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$Device::Moose::SCSI::VERSION = "0.13"; |
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}; |
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use Moose; |
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use namespace::clean -except => "meta"; |
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use Carp; |
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use IO::File; |
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use Fcntl qw/:mode/; |
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#----------------------------------------------------------------------------- |
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# Attributes |
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#----------------------------------------------------------------------------- |
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has "fh" => |
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( |
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is => "ro", |
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isa => "FileHandle", |
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writer => "_set_fh", |
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clearer => "close", |
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); |
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has "name" => |
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( |
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is => "ro", |
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isa => "Str", |
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writer => "_set_name", |
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); |
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has "devs" => |
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( |
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is => "ro", |
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isa => "HashRef", |
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builder => "_build_devs", |
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); |
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#----------------------------------------------------------------------------- |
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# Private Methods |
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#----------------------------------------------------------------------------- |
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sub _build_devs |
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{ |
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my $self = shift; |
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my %args = @_; |
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my $dh = undef; |
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53
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0
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if (!opendir($dh, "/dev")) |
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{ |
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0
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carp "Cannot read /dev: $!"; |
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return undef; |
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} |
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59
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0
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my %devs = (); |
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61
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0
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foreach my $file (readdir($dh)) |
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{ |
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0
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my @stat = lstat("/dev/$file"); |
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65
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# next if stat() failed |
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next unless (scalar(@stat)); |
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68
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# next if file isn't character special or block device |
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next unless (S_ISCHR($stat[2]) || S_ISBLK($stat[2])); |
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71
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my $major = int($stat[6] / 256); |
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73
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# major number of /dev/sg* is 21 and /dev/sd* is 8 |
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next unless ($major == 21 || $major == 8); |
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76
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my $minor = $stat[6] % 256; |
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78
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@{$devs{$file}}{qw/name major minor/} = ($file, $major, $minor); |
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79
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} |
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81
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0
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return \%devs; |
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} |
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84
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85
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#----------------------------------------------------------------------------- |
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# Public Methods |
87
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#----------------------------------------------------------------------------- |
88
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sub enumerate |
89
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{ |
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1
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my $self = shift; |
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my %args = @_; |
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93
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return sort { $a cmp $b } keys(%{$self->devs}); |
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94
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} |
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96
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sub open |
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{ |
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1
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my $self = shift; |
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my %args = @_; |
100
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101
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$self->close() if (defined($self->fh)); |
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103
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if (defined($args{device})) |
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{ |
105
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my $fh = IO::File->new("+</dev/$args{device}"); |
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107
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0
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if (!defined($fh)) |
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{ |
109
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carp "Cannot open $args{device}: $!"; |
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0
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return -1; |
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} |
112
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113
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0
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$self->_set_fh($fh); |
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0
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$self->_set_name($args{device}); |
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} |
116
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117
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0
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return 0; |
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} |
119
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120
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sub execute |
121
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{ |
122
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0
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1
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my $self = shift; |
123
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0
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my %args = @_; |
124
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125
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0
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my ($command, $wanted, $data) = @args{qw/command wanted data/}; |
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127
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0
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$data = "" unless(defined($data)); |
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129
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my $header = pack ("i4 I x16" |
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, 36 + length($command) + length($data) # int pack_len |
131
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, 36 + $wanted # int reply_len |
132
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, 0 # int pack_id |
133
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, 0 # int result |
134
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, length($command) == 12 ? 1 : 0); # unsigned int twelve_byte:1 |
135
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136
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0
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my $iobuf = $header . $command . $data; |
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138
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0
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my $ret = syswrite($self->fh, $iobuf, length($iobuf)); |
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140
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0
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0
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if (!defined($ret)) |
141
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{ |
142
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0
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carp "Cannot write to " . $self->name . ": $!"; |
143
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0
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return undef; |
144
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} |
145
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146
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0
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$ret = sysread($self->fh, $iobuf, 36 + $wanted); |
147
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148
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0
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0
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if (!defined($ret)) |
149
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{ |
150
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0
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carp "Cannot read from " . $self->name . ": $!"; |
151
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0
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return undef; |
152
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} |
153
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154
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0
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my @data = unpack("i4 I C16", substr($iobuf, 0, 36)); |
155
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156
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0
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return (substr($iobuf, 36), \@data); |
157
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} |
158
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159
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sub inquiry |
160
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{ |
161
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0
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0
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1
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my $self = shift; |
162
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163
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0
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my ($model, undef) = $self->execute( |
164
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command => pack("C x3 C x1", 0x12, 0x60) |
165
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, wanted => 96); |
166
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167
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0
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my ($serial, undef) = $self->execute( |
168
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command => pack("C3 x1 C x1", 0x12, 0x01, 0x80, 0x60) |
169
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, wanted => 96); |
170
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171
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0
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my %enq; |
172
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173
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0
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@enq{qw/DEVICE VENDOR PRODUCT REVISION SERIAL/} |
174
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= (unpack("C x7 A8 A16 A4", $model), $serial); |
175
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176
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0
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return \%enq; |
177
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} |
178
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179
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180
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#----------------------------------------------------------------------------- |
181
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# Life Cycle |
182
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#----------------------------------------------------------------------------- |
183
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sub BUILD |
184
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{ |
185
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0
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1
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my $self = shift; |
186
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0
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my $args = shift; |
187
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188
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0
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0
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if (defined($args->{device})) |
189
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{ |
190
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0
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$self->open(device => $args->{device}); |
191
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} |
192
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} |
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194
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1; |
195
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196
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__END__ |
197
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198
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=encoding utf8 |
199
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200
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=head1 NAME |
201
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202
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Device::Moose::SCSI - Reimplementation of Device::SCSI with Moose. |
203
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204
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=head1 SYNOPSIS |
205
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206
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use Device::Moose::SCSI; |
207
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208
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my $device = Device::Moose::SCSI->new(device => "/dev/sg0"); |
209
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210
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# INQUIRY |
211
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my $inquiry = $device->inquiry(); |
212
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213
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# TESTUNITREADY |
214
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my ($result, $sense) = $device->execute ( |
215
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command => pack("C x5", 0x00) |
216
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, wanted => 32 |
217
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); |
218
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219
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=head1 DESCRIPTION |
220
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221
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C<Device::Moose::SCSI> reimplementation of Device::SCSI using Moose. |
222
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223
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See L<Device::SCSI> for detail information. |
224
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225
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Refer to L<http://www.tldp.org/HOWTO/archived/SCSI-Programming-HOWTO> |
226
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if you need to know how to SCSI programming with Linux. |
227
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228
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=head1 ATTRIBUTES |
229
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230
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=over |
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232
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=item B<fh> |
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=item B<name> |
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=back |
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=head1 METHODS |
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=over |
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=item B<enumerate> |
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=item B<open> |
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=item B<close> |
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=item B<execute> |
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=item B<inquiry> |
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=back |
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=head2 Lifecycle methods |
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=over |
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=item B<BUILD> |
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=back |
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=head1 AUTHOR |
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Ji-Hyeon Gim <potatogim@potatogim.net> |
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=head1 CONTRIBUTORS |
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=head1 COPYRIGHT AND LICENSE |
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Copyright(c) 2015, by Ji-Hyeon Gim <potatogim@potatogim.net> |
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This is free software; you can redistribute it and/or modify it |
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under the same terms as Perl 5 itself at: |
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L<http://www.perlfoundation.org/artistic_license_2_0> |
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You may obtain a copy of the full license at: |
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L<http://www.perl.com/perl/misc/Artistic.html> |
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=head1 SEE ALSO |
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283
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L<Device::SCSI>, L<Moose> |
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=cut |