trunk/examples/example.pl

#!/usr/bin/perl -w
use strict;

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.
        print((scalar keys %files)."\n");
        return (keys %files),0;
}

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