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package Tie::Mounted; |
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3
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73643
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use strict; |
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2
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1
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31
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1
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5
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use warnings; |
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2
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1
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26
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5
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1
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1
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5
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use base qw(Tie::Array); |
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1
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525
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1
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1
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1818
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use boolean qw(true false); |
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3656
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1
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1
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1
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81
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use Carp qw(croak); |
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2
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1
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40
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9
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1
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1
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496
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use File::Which (); |
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1115
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1
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1
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1
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474
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use IO::File (); |
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9072
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1
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1127
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11
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12
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our ($VERSION, $FSTAB, $MOUNT_BIN, $UMOUNT_BIN, $NO_FILES); |
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$VERSION = '0.18_02'; |
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$FSTAB = '/etc/fstab'; |
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$MOUNT_BIN = '/sbin/mount'; |
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$UMOUNT_BIN = '/sbin/umount'; |
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19
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{ |
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sub TIEARRAY |
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{ |
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0
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0
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my $class = shift; |
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0
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_gather_paths(); |
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0
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_validate_node($_[0]); |
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27
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0
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return bless _tie(@_), $class; |
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} |
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0
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0
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sub FETCHSIZE { $#{$_[0]} } # FETCHSIZE, FETCH: Due to the node, |
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0
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0
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sub FETCH { $_[0]->[++$_[1]] } # which is being kept hideously, accordingly |
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# subtract (FETCHSIZE) or add (FETCH) 1. |
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34
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0
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0
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*STORESIZE = *STORE = sub { croak 'Tied array is read-only' }; |
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0
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0
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sub UNTIE { _umount($_[0]->[0]) } |
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} |
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sub _gather_paths |
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{ |
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my $locate = sub |
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{ |
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0
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0
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my ($target, $path) = @_; |
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45
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0
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0
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0
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unless (-e $$path && -x _) { |
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0
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my $which = File::Which::which($target); |
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0
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0
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croak "Cannot locate `$target': $!" unless defined $which; |
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0
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$$path = $which; |
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} |
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0
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0
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}; |
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52
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0
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$locate->('mount', \$MOUNT_BIN); |
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0
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$locate->('umount', \$UMOUNT_BIN); |
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} |
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56
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sub _validate_node |
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{ |
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0
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0
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my ($node) = @_; |
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60
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0
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0
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my $fh = IO::File->new("<$FSTAB") or croak "Cannot open `$FSTAB' for reading: $!"; |
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0
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my $fstabs = do { local $/; <$fh> }; |
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0
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0
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62
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0
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$fh->close; |
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64
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0
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0
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0
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if (not defined $node && length $node) { |
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0
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0
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0
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0
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65
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0
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croak 'No node supplied'; |
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} |
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elsif (!-e $node) { |
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0
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croak "$node does not exist"; |
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} |
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elsif (!-d $node) { |
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0
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croak "$node is not a directory"; |
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} |
73
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elsif ($fstabs =~ /^\#.*?\s$node\s/m) { |
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0
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croak "$node is enlisted as disabled in $FSTAB"; |
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} |
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elsif ($fstabs !~ /\s$node\s/) { |
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0
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croak "$node is not enlisted in $FSTAB"; |
78
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} |
79
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} |
80
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81
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sub _tie |
82
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{ |
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0
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0
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my $node = shift; |
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0
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0
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my @args = split /\s+/, defined $_[0] ? $_[0] : ''; |
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86
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0
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_mount($node, grep !/^-[aAd]$/o, @args); |
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88
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0
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0
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my $items = $NO_FILES ? [] : _read_dir($node); |
89
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90
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# Invisible node at index 0 |
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0
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unshift @$items, $node; |
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93
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0
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return $items; |
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} |
95
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96
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sub _mount |
97
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{ |
98
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0
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0
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my $node = shift; |
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100
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0
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0
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unless (_is_mounted($node)) { |
101
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0
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0
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system("$MOUNT_BIN @_ $node") == 0 or exit(1); |
102
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} |
103
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} |
104
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105
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sub _is_mounted |
106
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{ |
107
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0
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0
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my ($node) = @_; |
108
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109
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0
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0
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open(my $pipe, "$MOUNT_BIN |") or croak "Cannot open pipe to `$MOUNT_BIN': $!"; |
110
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0
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0
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my $ret_val = (scalar grep /\s$node\s/, <$pipe>) ? true : false; |
111
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0
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0
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close($pipe) or croak "Cannot close pipe to `$MOUNT_BIN': $!"; |
112
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113
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0
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return $ret_val; |
114
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} |
115
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116
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sub _read_dir |
117
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{ |
118
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0
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0
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my ($node) = @_; |
119
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120
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0
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0
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opendir(my $dh, $node) or croak "Cannot open directory `$node': $!"; |
121
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0
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my @items = grep !/^\.\.?$/, sort readdir($dh); |
122
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0
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0
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closedir($dh) or croak "Cannot close directory `$node': $!"; |
123
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124
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0
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return [ @items ]; |
125
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} |
126
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127
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sub _umount |
128
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{ |
129
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0
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0
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my ($node) = @_; |
130
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131
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0
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0
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if (_is_mounted($node)) { |
132
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0
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0
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system("$UMOUNT_BIN $node") == 0 or exit(1); |
133
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} |
134
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} |
135
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136
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1; |
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__END__ |