/[fuse.before_github]/perl/trunk/examples/example.pl
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Annotation of /perl/trunk/examples/example.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: 2511 byte(s)
subversion revision 71 commited to CVS

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

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