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use Carp; |
use Carp; |
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use Data::Dumper; |
use Data::Dumper; |
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our $VERSION = '0.07'; |
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our $VERSION = '0.04'; |
# block size for this filesystem |
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use constant BLOCK => 1024; |
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=head1 NAME |
=head1 NAME |
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=head1 DESCRIPTION |
=head1 DESCRIPTION |
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This module will use C<Fuse> module, part of C<FUSE (Filesystem in USErspace)> |
This module will use C<Fuse> module, part of C<FUSE (Filesystem in USErspace)> |
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available at L<http://sourceforge.net/projects/avf> to mount |
available at L<http://fuse.sourceforge.net/> to mount |
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your database as file system. |
your database as file system. |
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|
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That will give you possibility to use normal file-system tools (cat, grep, vi) |
That will give you possibility to use normal file-system tools (cat, grep, vi) |
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print Dumper($arg); |
print Dumper($arg); |
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unless ($self->fuse_module_loaded) { |
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print STDERR "no fuse module loaded. Trying sudo modprobe fuse!\n"; |
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system "sudo modprobe fuse" || die "can't modprobe fuse using sudo!\n"; |
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} |
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carp "mount 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 "mount needs 'mount' as mountpoint" unless ($arg->{'mount'}); |
carp "mount needs 'mount' as mountpoint" unless ($arg->{'mount'}); |
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die "fork() failed: $!" unless defined $pid; |
die "fork() failed: $!" unless defined $pid; |
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# child will return to caller |
# child will return to caller |
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if ($pid) { |
if ($pid) { |
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return $self; |
my $counter = 4; |
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while ($counter && ! $self->is_mounted) { |
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select(undef, undef, undef, 0.5); |
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$counter--; |
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} |
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if ($self->is_mounted) { |
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return $self; |
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} else { |
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return undef; |
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} |
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} |
} |
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} |
} |
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$self->{'read_filenames'} = sub { $self->read_filenames }; |
$self->{'read_filenames'} = sub { $self->read_filenames }; |
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$self->read_filenames; |
$self->read_filenames; |
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$self->{'mounted'} = 1; |
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$fuse_self = \$self; |
$fuse_self = \$self; |
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Fuse::main( |
Fuse::main( |
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debug=>0, |
debug=>0, |
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); |
); |
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$self->{'mounted'} = 0; |
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exit(0) if ($arg->{'fork'}); |
exit(0) if ($arg->{'fork'}); |
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return 1; |
return 1; |
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}; |
}; |
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=head2 is_mounted |
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Check if fuse filesystem is mounted |
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if ($mnt->is_mounted) { ... } |
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=cut |
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sub is_mounted { |
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my $self = shift; |
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my $mounted = 0; |
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my $mount = $self->{'mount'} || confess "can't find mount point!"; |
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if (open(MTAB, "/etc/mtab")) { |
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while(<MTAB>) { |
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$mounted = 1 if (/ $mount fuse /i); |
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} |
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close(MTAB); |
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} else { |
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warn "can't open /etc/mtab: $!"; |
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} |
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return $mounted; |
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} |
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=head2 umount |
=head2 umount |
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Unmount your database as filesystem. |
Unmount your database as filesystem. |
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sub umount { |
sub umount { |
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my $self = shift; |
my $self = shift; |
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if ($self->{'mounted'}) { |
if ($self->{'mount'} && $self->is_mounted) { |
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system "fusermount -u ".$self->{'mount'} || croak "umount error: $!"; |
system "( fusermount -u ".$self->{'mount'}." 2>&1 ) >/dev/null" || |
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system "sudo umount ".$self->{'mount'} || |
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return 0; |
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return 1; |
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} |
} |
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return 1; |
return 0; |
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} |
} |
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$SIG{'INT'} = sub { |
$SIG{'INT'} = sub { |
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print STDERR "umount called by SIG INT\n"; |
if ($fuse_self && $$fuse_self->umount) { |
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umount; |
print STDERR "umount called by SIG INT\n"; |
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} |
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}; |
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$SIG{'QUIT'} = sub { |
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if ($fuse_self && $$fuse_self->umount) { |
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print STDERR "umount called by SIG QUIT\n"; |
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} |
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}; |
}; |
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sub DESTROY { |
sub DESTROY { |
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my $self = shift; |
my $self = shift; |
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return if (! $self->{'mounted'}); |
if ($self->umount) { |
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print STDERR "umount called by DESTROY\n"; |
print STDERR "umount called by DESTROY\n"; |
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$self->umount; |
} |
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} |
} |
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=head2 fuse_module_loaded |
=head2 fuse_module_loaded |
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} |
} |
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my %files; |
my %files; |
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my %dirs; |
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sub read_filenames { |
sub read_filenames { |
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my $self = shift; |
my $self = shift; |
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type => 0040, |
type => 0040, |
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mode => 0755, |
mode => 0755, |
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}, |
}, |
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'..' => { |
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type => 0040, |
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mode => 0755, |
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}, |
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# a => { |
# a => { |
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# cont => "File 'a'.\n", |
# cont => "File 'a'.\n", |
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# type => 0100, |
# type => 0100, |
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# first, entry is assumed to be file |
# first, entry is assumed to be file |
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if ($d) { |
if ($d) { |
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$files{$d} = { |
$files{$d} = { |
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size => $dirs{$d}++, |
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mode => 0755, |
mode => 0755, |
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type => 0040 |
type => 0040 |
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}; |
}; |
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} |
} |
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} |
} |
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print "found ",scalar(keys %files)-scalar(keys %dirs)," files, ",scalar(keys %dirs), " dirs\n"; |
print "found ",scalar(keys %files)," files\n"; |
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} |
} |
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$file =~ s,^/,,; |
$file =~ s,^/,,; |
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$file = '.' unless length($file); |
$file = '.' unless length($file); |
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return -ENOENT() unless exists($files{$file}); |
return -ENOENT() unless exists($files{$file}); |
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my ($size) = $files{$file}{size} || 1; |
my ($size) = $files{$file}{size} || BLOCK; |
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my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,1,0,0,1,1024); |
my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,int(($size+BLOCK-1)/BLOCK),0,0,1,BLOCK); |
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my ($atime, $ctime, $mtime); |
my ($atime, $ctime, $mtime); |
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$atime = $ctime = $mtime = $files{$file}{ctime} || $ctime_start; |
$atime = $ctime = $mtime = $files{$file}{ctime} || $ctime_start; |
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# 2 possible types of return values: |
# 2 possible types of return values: |
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#return -ENOENT(); # or any other error you care to |
#return -ENOENT(); # or any other error you care to |
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#print(join(",",($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks)),"\n"); |
print "getattr($file) ",join(",",($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks)),"\n"; |
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return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks); |
return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks); |
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} |
} |
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my %out; |
my %out; |
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foreach my $f (sort keys %files) { |
foreach my $f (sort keys %files) { |
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if ($dirname) { |
if ($dirname) { |
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if ($f =~ s/^\E$dirname\Q\///) { |
if ($f =~ s/^\Q$dirname\E\///) { |
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$out{$f}++ if ($f =~ /^[^\/]+$/); |
$out{$f}++ if ($f =~ /^[^\/]+$/); |
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} |
} |
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} else { |
} else { |
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$sth->{'read'}->execute($id) || die $sth->{'read'}->errstr; |
$sth->{'read'}->execute($id) || die $sth->{'read'}->errstr; |
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$files{$file}{cont} = $sth->{'read'}->fetchrow_array; |
$files{$file}{cont} = $sth->{'read'}->fetchrow_array; |
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$files{$file}{ctime} = time(); |
# I should modify ctime only if content in database changed |
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#$files{$file}{ctime} = time() unless ($files{$file}{ctime}); |
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print "file '$file' content [",length($files{$file}{cont})," bytes] read in cache\n"; |
print "file '$file' content [",length($files{$file}{cont})," bytes] read in cache\n"; |
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} |
} |
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print "invalidate all cached content\n"; |
print "invalidate all cached content\n"; |
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foreach my $f (keys %files) { |
foreach my $f (keys %files) { |
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delete $files{$f}{cont}; |
delete $files{$f}{cont}; |
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delete $files{$f}{ctime}; |
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} |
} |
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print "begin new transaction\n"; |
print "begin new transaction\n"; |
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#$dbh->begin_work || die $dbh->errstr; |
#$dbh->begin_work || die $dbh->errstr; |
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return 0; |
return 0; |
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} |
} |
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sub e_statfs { return 255, 1, 1, 1, 1, 2 } |
sub e_statfs { |
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my $size = 0; |
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my $inodes = 0; |
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foreach my $f (keys %files) { |
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if ($f !~ /(^|\/)\.\.?$/) { |
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$size += $files{$f}{size} || 0; |
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$inodes++; |
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} |
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print "$inodes: $f [$size]\n"; |
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} |
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$size = int(($size+BLOCK-1)/BLOCK); |
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my @ret = (255, $inodes, 1, $size, $size-1, BLOCK); |
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print "statfs: ",join(",",@ret),"\n"; |
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return @ret; |
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} |
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sub e_unlink { |
sub e_unlink { |
571 |
my $file = filename_fixup(shift); |
my $file = filename_fixup(shift); |
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573 |
if (exists( $dirs{$file} )) { |
# if (exists( $dirs{$file} )) { |
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print "unlink '$file' will re-read template names\n"; |
# print "unlink '$file' will re-read template names\n"; |
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print Dumper($fuse_self); |
# print Dumper($fuse_self); |
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$$fuse_self->{'read_filenames'}->(); |
# $$fuse_self->{'read_filenames'}->(); |
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return 0; |
# return 0; |
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} elsif (exists( $files{$file} )) { |
if (exists( $files{$file} )) { |
579 |
print "unlink '$file' will invalidate cache\n"; |
print "unlink '$file' will invalidate cache\n"; |
580 |
read_content($file,$files{$file}{id}); |
read_content($file,$files{$file}{id}); |
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return 0; |
return 0; |
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Nothing. |
Nothing. |
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=head1 BUGS |
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Size information (C<ls -s>) is wrong. It's a problem in upstream Fuse module |
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(for which I'm to blame lately), so when it gets fixes, C<Fuse::DBI> will |
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automagically pick it up. |
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=head1 SEE ALSO |
=head1 SEE ALSO |
600 |
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601 |
C<FUSE (Filesystem in USErspace)> website |
C<FUSE (Filesystem in USErspace)> website |
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L<http://sourceforge.net/projects/avf> |
L<http://fuse.sourceforge.net/> |
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|
604 |
Example for WebGUI which comes with this distribution in |
Example for WebGUI which comes with this distribution in |
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directory C<examples/webgui.pl>. It also contains a lot of documentation |
directory C<examples/webgui.pl>. It also contains a lot of documentation |