perl bindings

1 files changed, 83 insertions, 0 deletions

diff --git a/perl/example.pl b/perl/example.pl
new file mode 100755
index 0000000..257f2c9
--- /dev/null
+++ b/perl/example.pl
@@ -0,0 +1,83 @@
+#!/usr/bin/perl
+
+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 ($blocks, $gid, $uid, $nlink) = (1,0,0,1);
+	# 4 possible return values:
+	#return -ENOENT(); # or any other error you care to
+	return ($blocks,$size,$gid,$uid,$nlink,$modes,$files{$file}{ctime});
+	# return ($errno,$blocks,$size,$gid,$uid,$nlink,$modes,$time);
+	# return ($errno,$blksize,$blocks,$size,$gid,$uid,$nlink,$modes,$time);
+	# if omitted, errno defaults to 0, and blksize defaults to 1024.
+}
+
+sub e_getdir {
+	# return as many text filenames as you like, followed by the retval.
+	return (keys %files),0;
+}
+
+sub e_open {
+	# VFS sanity check; it keeps all the necessary state, not much to do here.
+	my ($file) = filename_fixup(shift);
+	return -ENOENT() unless exists($files{$file});
+	return -EISDIR() unless exists($files{$file}{cont});
+	return 0;
+}
+
+sub e_read {
+	# return an error numeric, or binary/text string.  (note: 0 means EOF, "0" will
+	# give a byte (ascii "0") to the reading program)
+	my ($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,$buf);
+}
+
+# If you run the script directly, it will run fusermount, which will in turn
+# re-run this script.  Hence the funky semantics.
+my ($mountpoint) = "";
+$mountpoint = shift(@ARGV) if @ARGV;
+Fuse::main(
+	mountpoint=>$mountpoint,
+	getattr=>\&e_getattr,
+	getdir=>\&e_getdir,
+	open=>\&e_open,
+	read=>\&e_read,
+);