9 |
use POSIX qw(ENOENT EISDIR EINVAL ENOSYS O_RDWR); |
use POSIX qw(ENOENT EISDIR EINVAL ENOSYS O_RDWR); |
10 |
use Fuse; |
use Fuse; |
11 |
use DBI; |
use DBI; |
12 |
|
use Carp; |
13 |
|
use Proc::Simple; |
14 |
|
use Data::Dumper; |
15 |
|
|
16 |
our $VERSION = '0.01'; |
|
17 |
|
our $VERSION = '0.02'; |
18 |
|
|
19 |
=head1 NAME |
=head1 NAME |
20 |
|
|
23 |
=head1 SYNOPSIS |
=head1 SYNOPSIS |
24 |
|
|
25 |
use Fuse::DBI; |
use Fuse::DBI; |
26 |
Fuse::DBI->run( ... ); |
Fuse::DBI->mount( ... ); |
27 |
|
|
28 |
See L<run> below for examples how to set parametars. |
See L<run> below for examples how to set parametars. |
29 |
|
|
43 |
|
|
44 |
=cut |
=cut |
45 |
|
|
46 |
=head2 run |
=head2 mount |
47 |
|
|
48 |
Mount your database as filesystem. |
Mount your database as filesystem. |
49 |
|
|
50 |
Fuse::DBI->run({ |
my $mnt = Fuse::DBI->mount({ |
51 |
filenames => 'select name from filenamefilenames, |
filenames => 'select name from filenamefilenames, |
52 |
read => 'sql read', |
read => 'sql read', |
53 |
update => 'sql update', |
update => 'sql update', |
62 |
my $sth; |
my $sth; |
63 |
my $ctime_start; |
my $ctime_start; |
64 |
|
|
65 |
sub run { |
sub read_filenames; |
66 |
my $self = shift |
|
67 |
|
sub mount { |
68 |
|
my $class = shift; |
69 |
|
my $self = {}; |
70 |
|
bless($self, $class); |
71 |
|
|
72 |
|
my $arg = shift; |
73 |
|
|
74 |
|
print Dumper($arg); |
75 |
|
|
76 |
my $arg = {@_}; |
carp "mount needs 'dsn' to connect to (e.g. dsn => 'DBI:Pg:dbname=test')" unless ($arg->{'dsn'}); |
77 |
|
carp "mount needs 'mount' as mountpoint" unless ($arg->{'mount'}); |
78 |
|
|
79 |
carp "run needs 'dsn' to connect to (e.g. dsn => 'DBI:Pg:dbname=test')" unless ($arg->{'dsn'}); |
# save (some) arguments in self |
80 |
carp "run needs 'mount' as mountpoint" unless ($arg->{'mount'}); |
$self->{$_} = $arg->{$_} foreach (qw(mount)); |
81 |
|
|
82 |
foreach (qw(filenames read update)) { |
foreach (qw(filenames read update)) { |
83 |
carp "run needs '$_' SQL" unless ($arg->{$_}); |
carp "mount needs '$_' SQL" unless ($arg->{$_}); |
84 |
} |
} |
85 |
|
|
86 |
$dbh = DBI->connect($arg->{'dsn'},$arg->{'user'},$arg->{'password'}, { AutoCommit => 0 }) || die $DBI::errstr; |
$dbh = DBI->connect($arg->{'dsn'},$arg->{'user'},$arg->{'password'}, { AutoCommit => 0 }) || die $DBI::errstr; |
87 |
|
|
88 |
print "start transaction\n"; |
print "start transaction\n"; |
89 |
#$dbh->begin_work || die $dbh->errstr; |
$dbh->begin_work || die $dbh->errstr; |
90 |
|
|
91 |
$sth->{filenames} = $dbh->prepare($arg->{'filenames'}) || die $dbh->errstr(); |
$sth->{filenames} = $dbh->prepare($arg->{'filenames'}) || die $dbh->errstr(); |
92 |
|
|
97 |
|
|
98 |
read_filenames; |
read_filenames; |
99 |
|
|
100 |
Fuse::main( |
$self->{'proc'} = Proc::Simple->new(); |
101 |
mountpoint=>$arg->{'mount'}, |
$self->{'proc'}->kill_on_destroy(1); |
102 |
getattr=>\&e_getattr, |
|
103 |
getdir=>\&e_getdir, |
$self->{'proc'}->start( sub { |
104 |
open=>\&e_open, |
Fuse::main( |
105 |
statfs=>\&e_statfs, |
mountpoint=>$arg->{'mount'}, |
106 |
read=>\&e_read, |
getattr=>\&e_getattr, |
107 |
write=>\&e_write, |
getdir=>\&e_getdir, |
108 |
utime=>\&e_utime, |
open=>\&e_open, |
109 |
truncate=>\&e_truncate, |
statfs=>\&e_statfs, |
110 |
debug=>0, |
read=>\&e_read, |
111 |
); |
write=>\&e_write, |
112 |
|
utime=>\&e_utime, |
113 |
|
truncate=>\&e_truncate, |
114 |
|
debug=>0, |
115 |
|
); |
116 |
|
} ); |
117 |
|
|
118 |
|
confess "Fuse::main failed" if (! $self->{'proc'}->poll); |
119 |
|
|
120 |
|
$self ? return $self : return undef; |
121 |
}; |
}; |
122 |
|
|
123 |
|
=head2 umount |
124 |
|
|
125 |
|
Unmount your database as filesystem. |
126 |
|
|
127 |
|
$mnt->umount; |
128 |
|
|
129 |
|
This will also kill background process which is translating |
130 |
|
database to filesystem. |
131 |
|
|
132 |
|
=cut |
133 |
|
|
134 |
|
sub umount { |
135 |
|
my $self = shift; |
136 |
|
|
137 |
|
confess "no process running?" unless ($self->{'proc'}); |
138 |
|
|
139 |
|
system "fusermount -u ".$self->{'mount'} || croak "umount error: $!"; |
140 |
|
|
141 |
|
if ($self->{'proc'}->poll) { |
142 |
|
$self->{'proc'}->kill; |
143 |
|
return 1 if (! $self->{'proc'}->poll); |
144 |
|
} else { |
145 |
|
return 1; |
146 |
|
} |
147 |
|
} |
148 |
|
|
149 |
|
|
150 |
my %files; |
my %files; |
151 |
my %dirs; |
my %dirs; |
152 |
|
|
153 |
sub read_filenames { |
sub read_filenames { |
154 |
|
my $self = shift; |
155 |
|
|
156 |
# create empty filesystem |
# create empty filesystem |
157 |
(%files) = ( |
(%files) = ( |
158 |
'.' => { |
'.' => { |
235 |
# return as many text filenames as you like, followed by the retval. |
# return as many text filenames as you like, followed by the retval. |
236 |
print((scalar keys %files)." files total\n"); |
print((scalar keys %files)." files total\n"); |
237 |
my %out; |
my %out; |
238 |
foreach (keys %files) { |
foreach my $f (sort keys %files) { |
|
my $f = $_; |
|
|
$f =~ s/^\E$dirname\Q//; |
|
|
$f =~ s/^\///; |
|
239 |
if ($dirname) { |
if ($dirname) { |
240 |
$out{$f}++ if (/^\E$dirname\Q/ && $f =~ /^[^\/]+$/); |
if ($f =~ s/^\E$dirname\Q\///) { |
241 |
|
$out{$f}++ if ($f =~ /^[^\/]+$/); |
242 |
|
} |
243 |
} else { |
} else { |
244 |
$out{$f}++ if ($f =~ /^[^\/]+$/); |
$out{$f}++ if ($f =~ /^[^\/]+$/); |
245 |
} |
} |
248 |
$out{'no files? bug?'}++; |
$out{'no files? bug?'}++; |
249 |
} |
} |
250 |
print scalar keys %out," files in dir '$dirname'\n"; |
print scalar keys %out," files in dir '$dirname'\n"; |
251 |
|
print "## ",join(" ",keys %out),"\n"; |
252 |
return (keys %out),0; |
return (keys %out),0; |
253 |
} |
} |
254 |
|
|
324 |
|
|
325 |
sub e_write { |
sub e_write { |
326 |
my $file = filename_fixup(shift); |
my $file = filename_fixup(shift); |
327 |
my ($buf_len,$off) = @_; |
my ($buffer,$off) = @_; |
328 |
|
|
329 |
return -ENOENT() unless exists($files{$file}); |
return -ENOENT() unless exists($files{$file}); |
330 |
|
|
331 |
my $len = length($files{$file}{cont}); |
my $cont = $files{$file}{cont}; |
332 |
|
my $len = length($cont); |
333 |
|
|
334 |
print "write '$file' [$len bytes] offset $off length\n"; |
print "write '$file' [$len bytes] offset $off length ",length($buffer),"\n"; |
335 |
|
|
336 |
$files{$file}{cont} = |
$files{$file}{cont} = ""; |
337 |
substr($files{$file}{cont},0,$off) . |
|
338 |
$buf_len . |
$files{$file}{cont} .= substr($cont,0,$off) if ($off > 0); |
339 |
substr($files{$file}{cont},$off+length($buf_len)); |
$files{$file}{cont} .= $buffer; |
340 |
|
$files{$file}{cont} .= substr($cont,-($off+length($buffer))) if ($off+length($buffer) > $len); |
341 |
|
|
342 |
|
$files{$file}{size} = length($files{$file}{cont}); |
343 |
|
|
344 |
if (! update_db($file)) { |
if (! update_db($file)) { |
345 |
return -ENOSYS(); |
return -ENOSYS(); |
346 |
} else { |
} else { |
347 |
return length($buf_len); |
return length($buffer); |
348 |
} |
} |
349 |
} |
} |
350 |
|
|
352 |
my $file = filename_fixup(shift); |
my $file = filename_fixup(shift); |
353 |
my $size = shift; |
my $size = shift; |
354 |
|
|
355 |
|
print "truncate to $size\n"; |
356 |
|
|
357 |
$files{$file}{cont} = substr($files{$file}{cont},0,$size); |
$files{$file}{cont} = substr($files{$file}{cont},0,$size); |
358 |
|
$files{$file}{size} = $size; |
359 |
return 0 |
return 0 |
360 |
}; |
}; |
361 |
|
|