use warnings;
use Errno;
use Carp;
+use Config;
require Exporter;
require DynaLoader;
# If you do not need this, moving things directly into @EXPORT or @EXPORT_OK
# will save memory.
our %EXPORT_TAGS = (
- 'all' => [ qw(FUSE_DEBUG XATTR_CREATE XATTR_REPLACE) ],
- 'debug' => [ qw(FUSE_DEBUG) ],
+ 'all' => [ qw(XATTR_CREATE XATTR_REPLACE fuse_get_context) ],
'xattr' => [ qw(XATTR_CREATE XATTR_REPLACE) ]
);
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
-our @EXPORT = qw(
- FUSE_DEBUG
-);
-our $VERSION = '0.06';
+our @EXPORT = ();
+our $VERSION = '0.09_2';
sub AUTOLOAD {
# This AUTOLOAD is used to 'autoload' constants from the constant()
bootstrap Fuse $VERSION;
sub main {
- my (@subs) = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
- my (@names) = qw(getattr readlink getdir mknod mkdir unlink rmdir symlink
- rename link chmod chown truncate utime open read write statfs
- flush release fsync setxattr getxattr listxattr removexattr);
- my (@validOpts) = qw(allow_other);
- my ($tmp) = 0;
- my (%mapping) = map { $_ => $tmp++ } (@names);
- my (%optmap) = map { $_ => 1 } (@validOpts);
- my (%otherargs) = (debug=>0, mountpoint=>"", mountopts=>"");
+ my @names = qw(getattr readlink getdir mknod mkdir unlink rmdir symlink
+ rename link chmod chown truncate utime open read write statfs
+ flush release fsync setxattr getxattr listxattr removexattr);
+ my @subs = map {undef} @names;
+ my @validOpts = qw(ro allow_other default_permissions fsname use_ino nonempty);
+ my $tmp = 0;
+ my %mapping = map { $_ => $tmp++ } @names;
+ my %optmap = map { $_ => 1 } @validOpts;
+ my @otherargs = qw(debug threaded mountpoint mountopts);
+ my %otherargs = (debug=>0, threaded=>0, mountpoint=>"", mountopts=>"");
while(my $name = shift) {
my ($subref) = shift;
if(exists($otherargs{$name})) {
$otherargs{$name} = $subref;
} else {
croak "There is no function $name" unless exists($mapping{$name});
- croak "Usage: Fuse::main(getattr => &my_getattr, ...)" unless $subref;
- croak "Usage: Fuse::main(getattr => &my_getattr, ...)" unless ref($subref);
- croak "Usage: Fuse::main(getattr => &my_getattr, ...)" unless ref($subref) eq "CODE";
+ croak "Usage: Fuse::main(getattr => \"main::my_getattr\", ...)" unless $subref;
$subs[$mapping{$name}] = $subref;
}
}
- foreach my $opt ( split(/,/,$otherargs{mountopts}) ) {
- if ( ! exists($optmap{$opt}) ) {
- croak "Use of an invalid mountopt argument";
- }
- }
- perl_fuse_main($otherargs{debug},$otherargs{mountpoint},$otherargs{mountopts},@subs);
+ foreach my $opt ( map {m/^([^=]*)/; $1} split(/,/,$otherargs{mountopts}) ) {
+ next if exists($optmap{$opt});
+ croak "Fuse::main: invalid '$opt' argument in mountopts";
+ }
+ if($otherargs{threaded}) {
+ # make sure threads are both available, and loaded.
+ if($Config{useithreads}) {
+ if(exists($threads::{VERSION})) {
+ if(exists($threads::shared::{VERSION})) {
+ # threads will work.
+ } else {
+ carp("Thread support requires you to use threads::shared.\nThreads are disabled.\n");
+ $otherargs{threaded} = 0;
+ }
+ } else {
+ carp("Thread support requires you to use threads and threads::shared.\nThreads are disabled.\n");
+ $otherargs{threaded} = 0;
+ }
+ } else {
+ carp("Thread support was not compiled into this build of perl.\nThreads are disabled.\n");
+ $otherargs{threaded} = 0;
+ }
+ }
+ perl_fuse_main(@otherargs{@otherargs},@subs);
}
# Autoload methods go after =cut, and are processed by the autosplit program.
use Fuse;
my ($mountpoint) = "";
$mountpoint = shift(@ARGV) if @ARGV;
- Fuse::main(mountpoint=>$mountpoint, getattr=>\&my_getattr, getdir=>\&my_getdir, ...);
+ Fuse::main(mountpoint=>$mountpoint, getattr=>"main::my_getattr", getdir=>"main::my_getdir", ...);
=head1 DESCRIPTION
FUSE expects you to implement callbacks for the various functions.
-NOTE: I have only tested the things implemented in example.pl!
-It should work, but some things may not.
-
In the following definitions, "errno" can be 0 (for a success),
-EINVAL, -ENOENT, -EONFIRE, any integer less than 1 really.
=head2 EXPORTED SYMBOLS
-FUSE_DEBUG by default.
+None by default.
You can request all exportable symbols by using the tag ":all".
-You can request all debug symbols by using the tag ":debug".
-This will export FUSE_DEBUG.
-
You can request the extended attribute symbols by using the tag ":xattr".
This will export XATTR_CREATE and XATTR_REPLACE.
=back
-unthreaded => boolean
+threaded => boolean
=over 1
-This turns FUSE multithreading off and on. NOTE: This perlmodule does not
-currently work properly in multithreaded mode! The author is unfortunately
-not familiar enough with perl-threads internals, and according to the
-documentation available at time of writing (2002-03-08), those internals are
-subject to changing anyway. Note that singlethreaded mode also means that
-you will not have to worry about reentrancy, though you will have to worry
-about recursive lookups (since the kernel holds a global lock on your
-filesystem and blocks waiting for one callback to complete before calling
-another).
-
-I hope to add full multithreading functionality later, but for now, I
-recommend you leave this option at the default, 1 (which means
-unthreaded, no threads will be used and no reentrancy is needed).
+This turns FUSE multithreading on and off. The default is 0, meaning your FUSE
+script will run in single-threaded mode. Note that single-threaded mode also
+means that you will not have to worry about reentrancy, though you will have to
+worry about recursive lookups. In single-threaded mode, FUSE holds a global
+lock on your filesystem, and will wait for one callback to return before
+calling another. This can lead to deadlocks, if your script makes any attempt
+to access files or directories in the filesystem it is providing. (This
+includes calling stat() on the mount-point, statfs() calls from the 'df'
+command, and so on and so forth.) It is worth paying a little attention and
+being careful about this.
+
+Enabling multithreading will cause FUSE to make multiple simultaneous calls
+into the various callback functions of your perl script. If you enable
+threaded mode, you can enjoy all the parallel execution and interactive
+response benefits of threads, and you get to enjoy all the benefits of race
+conditions and locking bugs, too. Please also ensure any other perl modules
+you're using are also thread-safe.
+
+(If enabled, this option will cause a warning if your perl interpreter was not
+built with USE_ITHREADS, or if you have failed to use threads or
+threads::shared.)
=back
+=head3 Fuse::fuse_get_context
+
+ use Fuse "fuse_get_context";
+ my $caller_uid = fuse_get_context()->{"uid"};
+ my $caller_gid = fuse_get_context()->{"gid"};
+ my $caller_pid = fuse_get_context()->{"pid"};
+
+Access context information about the current Fuse operation.
+
=head2 FUNCTIONS YOUR FILESYSTEM MAY IMPLEMENT
=head3 getattr