| #!/usr/bin/perl |
| |
| use Fuse; |
| use POSIX qw(ENOENT EISDIR EINVAL); |
| |
| my (%files) = ( |
| '.' => { |
| type => 0040, |
| mode => 0755, |
| ctime => time()-1000 |
| }, |
| a => { |
| cont => "File 'a'.\n", |
| type => 0100, |
| mode => 0755, |
| ctime => time()-2000 |
| }, |
| b => { |
| cont => "This is file 'b'.\n", |
| type => 0100, |
| mode => 0644, |
| ctime => time()-1000 |
| }, |
| ); |
| |
| sub filename_fixup { |
| my ($file) = shift; |
| $file =~ s,^/,,; |
| $file = '.' unless length($file); |
| return $file; |
| } |
| |
| sub e_getattr { |
| my ($file) = filename_fixup(shift); |
| $file =~ s,^/,,; |
| $file = '.' unless length($file); |
| return -ENOENT() unless exists($files{$file}); |
| my ($size) = exists($files{$file}{cont}) ? length($files{$file}{cont}) : 0; |
| my ($modes) = ($files{$file}{type}<<9) + $files{$file}{mode}; |
| my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,1,0,0,1,1024); |
| my ($atime, $ctime, $mtime); |
| $atime = $ctime = $mtime = $files{$file}{ctime}; |
| # 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,$blocks)),"\n"); |
| return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks); |
| } |
| |
| sub e_getdir { |
| # return as many text filenames as you like, followed by the retval. |
| return (keys %files),0; |
| } |
| |
| sub e_open { |
| # VFS sanity check; it keeps all the necessary state, not much to do here. |
| my ($file) = filename_fixup(shift); |
| return -ENOENT() unless exists($files{$file}); |
| return -EISDIR() unless exists($files{$file}{cont}); |
| return 0; |
| } |
| |
| sub e_read { |
| # return an error numeric, or binary/text string. (note: 0 means EOF, "0" will |
| # give a byte (ascii "0") to the reading program) |
| my ($file) = filename_fixup(shift); |
| my ($buf,$off) = @_; |
| return -ENOENT() unless exists($files{$file}); |
| return -EINVAL() if $off > length($files{$file}{cont}); |
| return 0 if $off == length($files{$file}{cont}); |
| return substr($files{$file}{cont},$off,$buf); |
| } |
| |
| sub e_statfs { return 255, 1, 1, 1, 1, 2 } |
| |
| # If you run the script directly, it will run fusermount, which will in turn |
| # re-run this script. Hence the funky semantics. |
| my ($mountpoint) = ""; |
| $mountpoint = shift(@ARGV) if @ARGV; |
| Fuse::main( |
| mountpoint=>$mountpoint, |
| getattr=>\&e_getattr, |
| getdir=>\&e_getdir, |
| open=>\&e_open, |
| statfs=>\&e_statfs, |
| #read=>\&e_read, |
| #debug=>1, threaded=>0 |
| ); |