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use POSIX qw(ENOENT EISDIR EINVAL ENOSYS O_RDWR); |
use POSIX qw(ENOENT EISDIR EINVAL ENOSYS O_RDWR); |
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use Fuse; |
use Fuse; |
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use DBI; |
use DBI; |
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use Carp; |
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use Proc::Simple; |
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use Data::Dumper; |
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our $VERSION = '0.01'; |
our $VERSION = '0.01'; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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use Fuse::DBI; |
use Fuse::DBI; |
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Fuse::DBI->run( ... ); |
Fuse::DBI->mount( ... ); |
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See L<run> below for examples how to set parametars. |
See L<run> below for examples how to set parametars. |
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=cut |
=cut |
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=head2 run |
=head2 mount |
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Mount your database as filesystem. |
Mount your database as filesystem. |
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Fuse::DBI->run({ |
my $mnt = Fuse::DBI->mount({ |
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filenames => 'select name from filenamefilenames, |
filenames => 'select name from filenamefilenames, |
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read => 'sql read', |
read => 'sql read', |
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update => 'sql update', |
update => 'sql update', |
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my $sth; |
my $sth; |
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my $ctime_start; |
my $ctime_start; |
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sub run { |
sub read_filenames; |
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my $self = shift |
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sub mount { |
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my $class = shift; |
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my $self = {}; |
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bless($self, $class); |
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my $arg = shift; |
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my $arg = {@_}; |
print Dumper($arg); |
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carp "run needs 'dsn' to connect to (e.g. dsn => 'DBI:Pg:dbname=test')" unless ($arg->{'dsn'}); |
carp "mount needs 'dsn' to connect to (e.g. dsn => 'DBI:Pg:dbname=test')" unless ($arg->{'dsn'}); |
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carp "run needs 'mount' as mountpoint" unless ($arg->{'mount'}); |
carp "mount needs 'mount' as mountpoint" unless ($arg->{'mount'}); |
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# save (some) arguments in self |
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$self->{$_} = $arg->{$_} foreach (qw(mount)); |
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foreach (qw(filenames read update)) { |
foreach (qw(filenames read update)) { |
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carp "run needs '$_' SQL" unless ($arg->{$_}); |
carp "mount needs '$_' SQL" unless ($arg->{$_}); |
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} |
} |
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$dbh = DBI->connect($arg->{'dsn'},$arg->{'user'},$arg->{'password'}, { AutoCommit => 0 }) || die $DBI::errstr; |
$dbh = DBI->connect($arg->{'dsn'},$arg->{'user'},$arg->{'password'}, { AutoCommit => 0 }) || die $DBI::errstr; |
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read_filenames; |
read_filenames; |
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Fuse::main( |
$self->{'proc'} = Proc::Simple->new(); |
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mountpoint=>$arg->{'mount'}, |
$self->{'proc'}->kill_on_destroy(1); |
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getattr=>\&e_getattr, |
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getdir=>\&e_getdir, |
$self->{'proc'}->start( sub { |
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open=>\&e_open, |
Fuse::main( |
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statfs=>\&e_statfs, |
mountpoint=>$arg->{'mount'}, |
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read=>\&e_read, |
getattr=>\&e_getattr, |
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write=>\&e_write, |
getdir=>\&e_getdir, |
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utime=>\&e_utime, |
open=>\&e_open, |
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truncate=>\&e_truncate, |
statfs=>\&e_statfs, |
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debug=>0, |
read=>\&e_read, |
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); |
write=>\&e_write, |
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utime=>\&e_utime, |
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truncate=>\&e_truncate, |
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debug=>0, |
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); |
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} ); |
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confess "Fuse::main failed" if (! $self->{'proc'}->poll); |
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$self ? return $self : return undef; |
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}; |
}; |
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=head2 umount |
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Unmount your database as filesystem. |
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$mnt->umount; |
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This will also kill background process which is translating |
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database to filesystem. |
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=cut |
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sub umount { |
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my $self = shift; |
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confess "no process running?" unless ($self->{'proc'}); |
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system "fusermount -u ".$self->{'mount'} || croak "umount error: $!"; |
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if ($self->{'proc'}->poll) { |
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$self->{'proc'}->kill; |
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return 1 if (! $self->{'proc'}->poll); |
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} else { |
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return 1; |
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} |
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} |
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my %files; |
my %files; |
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my %dirs; |
my %dirs; |
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sub read_filenames { |
sub read_filenames { |
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my $self = shift; |
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# create empty filesystem |
# create empty filesystem |
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(%files) = ( |
(%files) = ( |
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'.' => { |
'.' => { |