/[fuse.before_github]/perl/trunk/examples/example_t.pl
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Annotation of /perl/trunk/examples/example_t.pl

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Revision 98 - (hide annotations)
Tue Jan 3 16:45:51 2006 UTC (16 years, 9 months ago) by dpavlin
File MIME type: text/plain
File size: 2535 byte(s)
subversion revision 71 commited to CVS

1 dpavlin 20 #!/usr/bin/perl -w
2     use strict;
3     use threads;
4     use threads::shared;
5    
6     use Fuse;
7     use POSIX qw(ENOENT EISDIR EINVAL);
8    
9     my (%files) = (
10     '.' => {
11     type => 0040,
12     mode => 0755,
13     ctime => time()-1000
14     },
15     a => {
16     cont => "File 'a'.\n",
17     type => 0100,
18     mode => 0755,
19     ctime => time()-2000
20     },
21     b => {
22     cont => "This is file 'b'.\n",
23     type => 0100,
24     mode => 0644,
25     ctime => time()-1000
26     },
27     );
28    
29     sub filename_fixup {
30     my ($file) = shift;
31     $file =~ s,^/,,;
32     $file = '.' unless length($file);
33     return $file;
34     }
35    
36     sub e_getattr {
37     my ($file) = filename_fixup(shift);
38     $file =~ s,^/,,;
39     $file = '.' unless length($file);
40     return -ENOENT() unless exists($files{$file});
41     my ($size) = exists($files{$file}{cont}) ? length($files{$file}{cont}) : 0;
42     my ($modes) = ($files{$file}{type}<<9) + $files{$file}{mode};
43     my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,1,0,0,1,1024);
44     my ($atime, $ctime, $mtime);
45     $atime = $ctime = $mtime = $files{$file}{ctime};
46     # 2 possible types of return values:
47     #return -ENOENT(); # or any other error you care to
48     #print(join(",",($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks)),"\n");
49     return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks);
50     }
51    
52     sub e_getdir {
53     # return as many text filenames as you like, followed by the retval.
54     print((scalar keys %files)."\n");
55     return (keys %files),0;
56     }
57    
58     sub e_open {
59     # VFS sanity check; it keeps all the necessary state, not much to do here.
60     my ($file) = filename_fixup(shift);
61     print("open called\n");
62     return -ENOENT() unless exists($files{$file});
63     return -EISDIR() unless exists($files{$file}{cont});
64     print("open ok\n");
65     return 0;
66     }
67    
68     sub e_read {
69     # return an error numeric, or binary/text string. (note: 0 means EOF, "0" will
70     # give a byte (ascii "0") to the reading program)
71     my ($file) = filename_fixup(shift);
72     my ($buf,$off) = @_;
73     return -ENOENT() unless exists($files{$file});
74     return -EINVAL() if $off > length($files{$file}{cont});
75     return 0 if $off == length($files{$file}{cont});
76     return substr($files{$file}{cont},$off,$buf);
77     }
78    
79     sub e_statfs { return 255, 1, 1, 1, 1, 2 }
80    
81     # If you run the script directly, it will run fusermount, which will in turn
82     # re-run this script. Hence the funky semantics.
83     my ($mountpoint) = "";
84     $mountpoint = shift(@ARGV) if @ARGV;
85     Fuse::main(
86     mountpoint=>$mountpoint,
87     getattr=>"main::e_getattr",
88     getdir =>"main::e_getdir",
89     open =>"main::e_open",
90     statfs =>"main::e_statfs",
91     read =>"main::e_read",
92     threaded=>1
93     );

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