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