/[fuse-comp]/fuse-comp.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 33 by dpavlin, Mon Jul 16 07:41:55 2007 UTC revision 36 by dpavlin, Mon Jul 16 08:34:47 2007 UTC
# Line 10  require 'syscall.ph'; # for SYS_mknod an Line 10  require 'syscall.ph'; # for SYS_mknod an
10  use PerlIO::gzip;  use PerlIO::gzip;
11  use File::Path;  use File::Path;
12  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
13  use Carp qw/confess/;  use Carp qw/confess cluck/;
14  use IO::File;  use IO::File;
15  use Getopt::Long;  use Getopt::Long;
16    
# Line 30  my $mount = { Line 30  my $mount = {
30          tmp             => '/dev/shm/comp',          tmp             => '/dev/shm/comp',
31  };  };
32    
33  my $skip_extensions_regex = qr/\.(?:sw[a-z]|gif|png|jpeg|jpg|avi|rar|zip|bz2|gz|tgz|avi|mpeg|mpg|tmp|temp)$/i;  my $skip_extensions_regex = qr/gz|gz%|\.(?:sw[a-z]|gif|png|jpeg|jpg|avi|rar|zip|bz2|tgz|avi|mpeg|mpg|tmp|temp)$/i;
34    
35  # don't compress files smaller than this  # don't compress files smaller than this
36  my $min_compress_size = 512;  my $min_compress_size = 512;
# Line 47  my $pending; Line 47  my $pending;
47  sub real_name {  sub real_name {
48          my ( $dir, $name ) = @_;          my ( $dir, $name ) = @_;
49          if ( -e "$dir/${name}.gz" ) {          if ( -e "$dir/${name}.gz" ) {
50                  confess "ASSERT: unexpected $dir/$name exists" if -e "$dir/$name";                  cluck "ASSERT: unexpected $dir/$name exists" if -e "$dir/$name";
51                  return "${name}.gz";                  return "${name}.gz";
52          }          }
53          return $name;          if ( $name =~ m/\.gz$/ ) {
54                    return $name . '%';     # protect (mingle) compressed files
55            } else {
56                    return $name;
57            }
58  }  }
59    
60  sub fixup {  sub fixup {
# Line 61  sub fixup { Line 65  sub fixup {
65  sub original_name {  sub original_name {
66          my $p = shift;          my $p = shift;
67          $p =~ s/\.gz$//;          $p =~ s/\.gz$//;
68            $p =~ s/\.gz%$/.gz/;    # demungle compressed .gz files
69          return $p;          return $p;
70  };  };
71    
# Line 249  sub x_open { Line 254  sub x_open {
254          warn "## open( $file, $mode ) pending: ", $pending->{$file}->{open}, " mode $mode: ", dump( $mode_desc )," $path [", -s $path, "]\n" if $debug;          warn "## open( $file, $mode ) pending: ", $pending->{$file}->{open}, " mode $mode: ", dump( $mode_desc )," $path [", -s $path, "]\n" if $debug;
255    
256          my $fh;          my $fh;
257            my $rv = 0;
258    
259            if ( ! -w $path ) {
260                    my $old_mode = (stat $path)[2];
261                    my $new_mode = $old_mode | 0600;
262                    chmod $new_mode, $path || confess "can't chmod $new_mode $path";
263                    warn "### modify mode $old_mode -> $new_mode for $path\n";
264                    $pending->{$file}->{mode} = $old_mode;
265            }
266    
267          if ( sysopen($fh , $path, $mode) ) {          if ( sysopen($fh , $path, $mode) ) {
268                  close($fh) || confess "can't close $path: $!";                  close($fh) || confess "can't close $path: $!";
269                  warn "<<< sysopen $path [", -e $path ? -s $path : 'new' , "]\n";                  warn "<<< sysopen $path [", -e $path ? -s $path : 'new' , "]\n";
270                  $pending->{$file}->{open}++;                  $pending->{$file}->{open}++;
                 return 0;  
271          } else {          } else {
272                  warn "ERROR: can't open $path -- $!";                  warn "ERROR: can't open $path -- $!";
273                  return -$!;                  $rv = -$!;
274          }          }
275    
276            return $rv;
277    
278  }  }
279    
280  sub x_read {  sub x_read {
# Line 462  sub x_release { Line 477  sub x_release {
477    
478          $pending->{$file}->{open}--;          $pending->{$file}->{open}--;
479          if ( $pending->{$file}->{open} == 0 ) {          if ( $pending->{$file}->{open} == 0 ) {
480                  warn "## cleanup pending $file [", -s fixup($file), "]\n" if $debug;  
481                    my $path = fixup( $file );
482    
483                    if ( my $old_mode = $pending->{$file}->{mode} ) {
484                            chmod $old_mode, $path || confess "can't chmod $old_mode $path";
485                            warn "### restored mode $old_mode $path\n";
486    
487                    }
488    
489                    warn "## cleanup pending $file [", -s $path, "]\n" if $debug;
490                  delete( $pending->{$file} );                  delete( $pending->{$file} );
491          }          }
492    
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