use Carp;
use Data::Dumper;
+our $VERSION = '0.08';
-our $VERSION = '0.05';
+# block size for this filesystem
+use constant BLOCK => 1024;
=head1 NAME
print Dumper($arg);
+ unless ($self->fuse_module_loaded) {
+ print STDERR "no fuse module loaded. Trying sudo modprobe fuse!\n";
+ system "sudo modprobe fuse" || die "can't modprobe fuse using sudo!\n";
+ }
+
carp "mount needs 'dsn' to connect to (e.g. dsn => 'DBI:Pg:dbname=test')" unless ($arg->{'dsn'});
carp "mount needs 'mount' as mountpoint" unless ($arg->{'mount'});
my $pid;
if ($arg->{'fork'}) {
- $self->{'mounted'} = 1;
$pid = fork();
die "fork() failed: $!" unless defined $pid;
# child will return to caller
if ($pid) {
- return $self;
+ my $counter = 4;
+ while ($counter && ! $self->is_mounted) {
+ select(undef, undef, undef, 0.5);
+ $counter--;
+ }
+ if ($self->is_mounted) {
+ return $self;
+ } else {
+ return undef;
+ }
}
}
$self->{'read_filenames'} = sub { $self->read_filenames };
$self->read_filenames;
- $self->{'mounted'} = 1 unless ($arg->{'fork'});
-
$fuse_self = \$self;
Fuse::main(
debug=>0,
);
- $self->{'mounted'} = 0;
-
exit(0) if ($arg->{'fork'});
return 1;
};
+=head2 is_mounted
+
+Check if fuse filesystem is mounted
+
+ if ($mnt->is_mounted) { ... }
+
+=cut
+
+sub is_mounted {
+ my $self = shift;
+
+ my $mounted = 0;
+ my $mount = $self->{'mount'} || confess "can't find mount point!";
+ if (open(MTAB, "/etc/mtab")) {
+ while(<MTAB>) {
+ $mounted = 1 if (/ $mount fuse /i);
+ }
+ close(MTAB);
+ } else {
+ warn "can't open /etc/mtab: $!";
+ }
+
+ return $mounted;
+}
+
+
=head2 umount
Unmount your database as filesystem.
sub umount {
my $self = shift;
- if ($self->{'mounted'}) {
- system "fusermount -u ".$self->{'mount'} || warn "umount error: $!" && return 0;
+ if ($self->{'mount'} && $self->is_mounted) {
+ system "( fusermount -u ".$self->{'mount'}." 2>&1 ) >/dev/null";
+ if ($self->is_mounted) {
+ system "sudo umount ".$self->{'mount'} ||
+ return 0;
+ }
+ return 1;
}
- return 1;
+ return 0;
}
$SIG{'INT'} = sub {
- print STDERR "umount called by SIG INT\n";
- umount;
+ if ($fuse_self && $$fuse_self->umount) {
+ print STDERR "umount called by SIG INT\n";
+ }
+};
+
+$SIG{'QUIT'} = sub {
+ if ($fuse_self && $$fuse_self->umount) {
+ print STDERR "umount called by SIG QUIT\n";
+ }
};
sub DESTROY {
my $self = shift;
- return if (! $self->{'mounted'});
- print STDERR "umount called by DESTROY\n";
- $self->umount;
+ if ($self->umount) {
+ print STDERR "umount called by DESTROY\n";
+ }
}
=head2 fuse_module_loaded
}
my %files;
-my %dirs;
sub read_filenames {
my $self = shift;
type => 0040,
mode => 0755,
},
+ '..' => {
+ type => 0040,
+ mode => 0755,
+ },
# a => {
# cont => "File 'a'.\n",
# type => 0100,
# read them in with sesible defaults
while (my $row = $sth->{'filenames'}->fetchrow_hashref() ) {
+ $row->{'filename'} ||= 'NULL-'.$row->{'id'};
$files{$row->{'filename'}} = {
size => $row->{'size'},
mode => $row->{'writable'} ? 0644 : 0444,
id => $row->{'id'} || 99,
};
+
my $d;
foreach (split(m!/!, $row->{'filename'})) {
# first, entry is assumed to be file
if ($d) {
$files{$d} = {
- size => $dirs{$d}++,
mode => 0755,
type => 0040
};
}
}
- print "found ",scalar(keys %files)-scalar(keys %dirs)," files, ",scalar(keys %dirs), " dirs\n";
+ print "found ",scalar(keys %files)," files\n";
}
$file =~ s,^/,,;
$file = '.' unless length($file);
return -ENOENT() unless exists($files{$file});
- my ($size) = $files{$file}{size} || 1;
- my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,1,0,0,1,1024);
+ my ($size) = $files{$file}{size} || 0;
+ my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,int(($size+BLOCK-1)/BLOCK),0,0,1,BLOCK);
my ($atime, $ctime, $mtime);
$atime = $ctime = $mtime = $files{$file}{ctime} || $ctime_start;
# 2 possible types of return values:
#return -ENOENT(); # or any other error you care to
- #print(join(",",($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";
return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks);
}
read_content($file,$files{$file}{id}) unless exists($files{$file}{cont});
+ $files{$file}{cont} ||= '';
print "open '$file' ",length($files{$file}{cont})," bytes\n";
return 0;
}
return 0;
}
-sub e_statfs { return 255, 1, 1, 1, 1, 2 }
+sub e_statfs {
+
+ my $size = 0;
+ my $inodes = 0;
+
+ foreach my $f (keys %files) {
+ if ($f !~ /(^|\/)\.\.?$/) {
+ $size += $files{$f}{size} || 0;
+ $inodes++;
+ }
+ print "$inodes: $f [$size]\n";
+ }
+
+ $size = int(($size+BLOCK-1)/BLOCK);
+
+ my @ret = (255, $inodes, 1, $size, $size-1, BLOCK);
+
+ #print "statfs: ",join(",",@ret),"\n";
+
+ return @ret;
+}
sub e_unlink {
my $file = filename_fixup(shift);
- if (exists( $dirs{$file} )) {
- print "unlink '$file' will re-read template names\n";
- print Dumper($fuse_self);
- $$fuse_self->{'read_filenames'}->();
- return 0;
- } elsif (exists( $files{$file} )) {
+# if (exists( $dirs{$file} )) {
+# print "unlink '$file' will re-read template names\n";
+# print Dumper($fuse_self);
+# $$fuse_self->{'read_filenames'}->();
+# return 0;
+ if (exists( $files{$file} )) {
print "unlink '$file' will invalidate cache\n";
read_content($file,$files{$file}{id});
return 0;
Nothing.
+=head1 BUGS
+
+Size information (C<ls -s>) is wrong. It's a problem in upstream Fuse module
+(for which I'm to blame lately), so when it gets fixes, C<Fuse::DBI> will
+automagically pick it up.
+
=head1 SEE ALSO
C<FUSE (Filesystem in USErspace)> website
projects / Fuse-DBI / blobdiff