/[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 34 by dpavlin, Mon Jul 16 07:51:20 2007 UTC revision 39 by dpavlin, Sun Sep 2 12:03:52 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 25  GetOptions( Line 25  GetOptions(
25  );  );
26    
27  my $mount = {  my $mount = {
28          from    => '/tmp/comp',          from    => shift @ARGV || '/tmp/comp',
29          to              => '/tmp/no-comp',          to              => shift @ARGV || '/tmp/no-comp',
30          tmp             => '/dev/shm/comp',          tmp             => shift @ARGV || '/dev/shm/comp',
31  };  };
32    
33    warn "mount $mount->{from} to $mount->{to} using $mount->{tmp} as cache\n";
34    
35  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;  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;
36    
37  # don't compress files smaller than this  # don't compress files smaller than this
# Line 47  my $pending; Line 49  my $pending;
49  sub real_name {  sub real_name {
50          my ( $dir, $name ) = @_;          my ( $dir, $name ) = @_;
51          if ( -e "$dir/${name}.gz" ) {          if ( -e "$dir/${name}.gz" ) {
52                  confess "ASSERT: unexpected $dir/$name exists" if -e "$dir/$name";                  cluck "ASSERT: unexpected $dir/$name exists" if -e "$dir/$name";
53                  return "${name}.gz";                  return "${name}.gz";
54          }          }
55          if ( $name =~ m/\.gz$/ ) {          if ( $name =~ m/\.gz$/ ) {
# Line 254  sub x_open { Line 256  sub x_open {
256          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;
257    
258          my $fh;          my $fh;
259            my $rv = 0;
260    
261            if ( ! -w $path ) {
262                    my $old_mode = (stat $path)[2];
263                    my $new_mode = $old_mode | 0600;
264                    chmod $new_mode, $path || confess "can't chmod $new_mode $path";
265                    warn "### modify mode $old_mode -> $new_mode for $path\n";
266                    $pending->{$file}->{mode} = $old_mode;
267            }
268    
269          if ( sysopen($fh , $path, $mode) ) {          if ( sysopen($fh , $path, $mode) ) {
270                  close($fh) || confess "can't close $path: $!";                  close($fh) || confess "can't close $path: $!";
271                  warn "<<< sysopen $path [", -e $path ? -s $path : 'new' , "]\n";                  warn "<<< sysopen $path [", -e $path ? -s $path : 'new' , "]\n";
272                  $pending->{$file}->{open}++;                  $pending->{$file}->{open}++;
                 return 0;  
273          } else {          } else {
274                  warn "ERROR: can't open $path -- $!";                  warn "ERROR: can't open $path -- $!";
275                  return -$!;                  $rv = -$!;
276          }          }
277    
278            return $rv;
279    
280  }  }
281    
282  sub x_read {  sub x_read {
# Line 346  sub x_symlink { Line 358  sub x_symlink {
358          warn "# symlink( $from_path -> $to_path ) = $rv\n" if $debug;          warn "# symlink( $from_path -> $to_path ) = $rv\n" if $debug;
359    
360          my $tmp = $mount->{tmp} . '/' . $from;          my $tmp = $mount->{tmp} . '/' . $from;
361          if ( -e $tmp ) {          my $tmp_to = $mount->{tmp} . '/' . $to;
362                  my $tmp_to = $mount->{$tmp} . '/' . $to;          if ( $rv == 0 && -e $tmp_to ) {
363                  symlink( $tmp, $tmp_to ) || confess "can't symlink $tmp -> $tmp_to: $!";                  symlink( $tmp, $tmp_to ) || confess "can't symlink $tmp -> $tmp_to: $!";
364          }          }
365          return $rv;          return $rv;
# Line 467  sub x_release { Line 479  sub x_release {
479    
480          $pending->{$file}->{open}--;          $pending->{$file}->{open}--;
481          if ( $pending->{$file}->{open} == 0 ) {          if ( $pending->{$file}->{open} == 0 ) {
482                  warn "## cleanup pending $file [", -s fixup($file), "]\n" if $debug;  
483                    my $path = fixup( $file );
484    
485                    if ( my $old_mode = $pending->{$file}->{mode} ) {
486                            chmod $old_mode, $path || confess "can't chmod $old_mode $path";
487                            warn "### restored mode $old_mode $path\n";
488    
489                    }
490    
491                    warn "## cleanup pending $file [", -s $path, "]\n" if $debug;
492                  delete( $pending->{$file} );                  delete( $pending->{$file} );
493          }          }
494    
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