/[fuse.before_github]/perl/trunk/examples/example.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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Contents of /perl/trunk/examples/example.pl

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Revision 4 - (show annotations)
Thu Nov 11 14:44:15 2004 UTC (17 years, 6 months ago) by mszeredi
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File size: 2459 byte(s)
Initial revision

1 #!/usr/bin/perl
2
3 use Fuse;
4 use POSIX qw(ENOENT EISDIR EINVAL);
5
6 my (%files) = (
7 '.' => {
8 type => 0040,
9 mode => 0755,
10 ctime => time()-1000
11 },
12 a => {
13 cont => "File 'a'.\n",
14 type => 0100,
15 mode => 0755,
16 ctime => time()-2000
17 },
18 b => {
19 cont => "This is file 'b'.\n",
20 type => 0100,
21 mode => 0644,
22 ctime => time()-1000
23 },
24 );
25
26 sub filename_fixup {
27 my ($file) = shift;
28 $file =~ s,^/,,;
29 $file = '.' unless length($file);
30 return $file;
31 }
32
33 sub e_getattr {
34 my ($file) = filename_fixup(shift);
35 $file =~ s,^/,,;
36 $file = '.' unless length($file);
37 return -ENOENT() unless exists($files{$file});
38 my ($size) = exists($files{$file}{cont}) ? length($files{$file}{cont}) : 0;
39 my ($modes) = ($files{$file}{type}<<9) + $files{$file}{mode};
40 my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,1,0,0,1,1024);
41 my ($atime, $ctime, $mtime);
42 $atime = $ctime = $mtime = $files{$file}{ctime};
43 # 2 possible types of return values:
44 #return -ENOENT(); # or any other error you care to
45 #print(join(",",($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks)),"\n");
46 return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks);
47 }
48
49 sub e_getdir {
50 # return as many text filenames as you like, followed by the retval.
51 print((scalar keys %files)."\n");
52 return (keys %files),0;
53 }
54
55 sub e_open {
56 # VFS sanity check; it keeps all the necessary state, not much to do here.
57 my ($file) = filename_fixup(shift);
58 print("open called\n");
59 return -ENOENT() unless exists($files{$file});
60 return -EISDIR() unless exists($files{$file}{cont});
61 print("open ok\n");
62 return 0;
63 }
64
65 sub e_read {
66 # return an error numeric, or binary/text string. (note: 0 means EOF, "0" will
67 # give a byte (ascii "0") to the reading program)
68 my ($file) = filename_fixup(shift);
69 my ($buf,$off) = @_;
70 return -ENOENT() unless exists($files{$file});
71 return -EINVAL() if $off > length($files{$file}{cont});
72 return 0 if $off == length($files{$file}{cont});
73 return substr($files{$file}{cont},$off,$buf);
74 }
75
76 sub e_statfs { return 255, 1, 1, 1, 1, 2 }
77
78 # If you run the script directly, it will run fusermount, which will in turn
79 # re-run this script. Hence the funky semantics.
80 my ($mountpoint) = "";
81 $mountpoint = shift(@ARGV) if @ARGV;
82 Fuse::main(
83 mountpoint=>$mountpoint,
84 getattr=>\&e_getattr,
85 getdir=>\&e_getdir,
86 open=>\&e_open,
87 statfs=>\&e_statfs,
88 read=>\&e_read,
89 #debug=>1, threaded=>0
90 );

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