5 |
use warnings; |
use warnings; |
6 |
use Errno; |
use Errno; |
7 |
use Carp; |
use Carp; |
8 |
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use Config; |
9 |
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|
10 |
require Exporter; |
require Exporter; |
11 |
require DynaLoader; |
require DynaLoader; |
20 |
# This allows declaration use Fuse ':all'; |
# This allows declaration use Fuse ':all'; |
21 |
# If you do not need this, moving things directly into @EXPORT or @EXPORT_OK |
# If you do not need this, moving things directly into @EXPORT or @EXPORT_OK |
22 |
# will save memory. |
# will save memory. |
23 |
our %EXPORT_TAGS = ( 'all' => [ qw( |
our %EXPORT_TAGS = ( |
24 |
FUSE_DEBUG |
'all' => [ qw(XATTR_CREATE XATTR_REPLACE) ], |
25 |
) ] ); |
'xattr' => [ qw(XATTR_CREATE XATTR_REPLACE) ] |
26 |
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); |
27 |
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|
28 |
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } ); |
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } ); |
29 |
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|
30 |
our @EXPORT = qw( |
our @EXPORT = (); |
31 |
FUSE_DEBUG |
our $VERSION = '0.07_2'; |
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); |
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our $VERSION = '0.04'; |
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32 |
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33 |
sub AUTOLOAD { |
sub AUTOLOAD { |
34 |
# This AUTOLOAD is used to 'autoload' constants from the constant() |
# This AUTOLOAD is used to 'autoload' constants from the constant() |
62 |
goto &$AUTOLOAD; |
goto &$AUTOLOAD; |
63 |
} |
} |
64 |
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65 |
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sub XATTR_CREATE { |
66 |
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# See <sys/xattr.h>. |
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return 1; |
68 |
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} |
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70 |
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sub XATTR_REPLACE { |
71 |
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# See <sys/xattr.h>. |
72 |
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return 2; |
73 |
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} |
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75 |
bootstrap Fuse $VERSION; |
bootstrap Fuse $VERSION; |
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sub main { |
sub main { |
78 |
my (@subs) = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0); |
my (@subs) = (undef,undef,undef,undef,undef,undef,undef,undef,undef,undef, |
79 |
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undef,undef,undef,undef,undef,undef,undef,undef,undef,undef, |
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undef,undef,undef,undef,undef); |
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my (@names) = qw(getattr readlink getdir mknod mkdir unlink rmdir symlink |
my (@names) = qw(getattr readlink getdir mknod mkdir unlink rmdir symlink |
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rename link chmod chown truncate utime open read write statfs); |
rename link chmod chown truncate utime open read write statfs |
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flush release fsync setxattr getxattr listxattr removexattr); |
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my (@validOpts) = qw(allow_other); |
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my ($tmp) = 0; |
my ($tmp) = 0; |
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my (%mapping) = map { $_ => $tmp++ } (@names); |
my (%mapping) = map { $_ => $tmp++ } (@names); |
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my (%otherargs) = (debug=>0, mountpoint=>""); |
my (%optmap) = map { $_ => 1 } (@validOpts); |
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my (%otherargs) = (debug=>0, threaded=>0, mountpoint=>"", mountopts=>""); |
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while(my $name = shift) { |
while(my $name = shift) { |
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my ($subref) = shift; |
my ($subref) = shift; |
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if(exists($otherargs{$name})) { |
if(exists($otherargs{$name})) { |
92 |
$otherargs{$name} = $subref; |
$otherargs{$name} = $subref; |
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} else { |
} else { |
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croak "There is no function $name" unless exists($mapping{$name}); |
croak "There is no function $name" unless exists($mapping{$name}); |
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croak "Usage: Fuse::main(getattr => &my_getattr, ...)" unless $subref; |
croak "Usage: Fuse::main(getattr => \"main::my_getattr\", ...)" unless $subref; |
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croak "Usage: Fuse::main(getattr => &my_getattr, ...)" unless ref($subref); |
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croak "Usage: Fuse::main(getattr => &my_getattr, ...)" unless ref($subref) eq "CODE"; |
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$subs[$mapping{$name}] = $subref; |
$subs[$mapping{$name}] = $subref; |
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} |
} |
98 |
} |
} |
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perl_fuse_main($otherargs{debug},$otherargs{mountpoint},@subs); |
foreach my $opt ( split(/,/,$otherargs{mountopts}) ) { |
100 |
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if ( ! exists($optmap{$opt}) ) { |
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croak "Use of an invalid mountopt argument"; |
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} |
103 |
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} |
104 |
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if($otherargs{threaded}) { |
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# make sure threads are both available, and loaded. |
106 |
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if($Config{useithreads}) { |
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if(exists($threads::{VERSION})) { |
108 |
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if(exists($threads::shared::{VERSION})) { |
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# threads will work. |
110 |
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} else { |
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carp("Thread support requires you to use threads::shared.\nThreads are disabled.\n"); |
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$otherargs{threaded} = 0; |
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} |
114 |
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} else { |
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carp("Thread support requires you to use threads and threads::shared.\nThreads are disabled.\n"); |
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$otherargs{threaded} = 0; |
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} |
118 |
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} else { |
119 |
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carp("Thread support was not compiled into this build of perl.\nThreads are disabled.\n"); |
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$otherargs{threaded} = 0; |
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} |
122 |
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} |
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perl_fuse_main($otherargs{debug},$otherargs{threaded},$otherargs{mountpoint},$otherargs{mountopts},@subs); |
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} |
} |
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# Autoload methods go after =cut, and are processed by the autosplit program. |
# Autoload methods go after =cut, and are processed by the autosplit program. |
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use Fuse; |
use Fuse; |
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my ($mountpoint) = ""; |
my ($mountpoint) = ""; |
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$mountpoint = shift(@ARGV) if @ARGV; |
$mountpoint = shift(@ARGV) if @ARGV; |
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Fuse::main(mountpoint=>$mountpoint, getattr=>\&my_getattr, getdir=>\&my_getdir, ...); |
Fuse::main(mountpoint=>$mountpoint, getattr=>"main::my_getattr", getdir=>"main::my_getdir", ...); |
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=head1 DESCRIPTION |
=head1 DESCRIPTION |
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FUSE expects you to implement callbacks for the various functions. |
FUSE expects you to implement callbacks for the various functions. |
148 |
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NOTE: I have only tested the things implemented in example.pl! |
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It should work, but some things may not. |
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In the following definitions, "errno" can be 0 (for a success), |
In the following definitions, "errno" can be 0 (for a success), |
150 |
-EINVAL, -ENOENT, -EONFIRE, any integer less than 1 really. |
-EINVAL, -ENOENT, -EONFIRE, any integer less than 1 really. |
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|
156 |
etc) can be imported either from POSIX or from Fcntl, often both. |
etc) can be imported either from POSIX or from Fcntl, often both. |
157 |
See their respective documentations, for more information. |
See their respective documentations, for more information. |
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|
159 |
=head2 EXPORT |
=head2 EXPORTED SYMBOLS |
160 |
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161 |
None by default. |
None by default. |
162 |
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163 |
=head2 EXPORTABLE CONSTANTS |
You can request all exportable symbols by using the tag ":all". |
164 |
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|
165 |
None. |
You can request the extended attribute symbols by using the tag ":xattr". |
166 |
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This will export XATTR_CREATE and XATTR_REPLACE. |
167 |
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|
168 |
=head2 FUNCTIONS |
=head2 FUNCTIONS |
169 |
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192 |
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193 |
=back |
=back |
194 |
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|
195 |
unthreaded => boolean |
mountopts => string |
196 |
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197 |
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=over 1 |
198 |
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199 |
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This is a comma seperated list of mount options to pass to the FUSE kernel |
200 |
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module. |
201 |
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|
202 |
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At present, it allows the specification of the allow_other |
203 |
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argument when mounting the new FUSE filesystem. To use this, you will also |
204 |
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need 'user_allow_other' in /etc/fuse.conf as per the FUSE documention |
205 |
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|
206 |
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mountopts => "allow_other" or |
207 |
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mountopts => "" |
208 |
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|
209 |
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=back |
210 |
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|
211 |
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threaded => boolean |
212 |
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|
213 |
=over 1 |
=over 1 |
214 |
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|
215 |
This turns FUSE multithreading off and on. NOTE: This perlmodule does not |
This turns FUSE multithreading on and off. The default is 0, meaning your FUSE |
216 |
currently work properly in multithreaded mode! The author is unfortunately |
script will run in single-threaded mode. Note that single-threaded mode also |
217 |
not familiar enough with perl-threads internals, and according to the |
means that you will not have to worry about reentrancy, though you will have to |
218 |
documentation available at time of writing (2002-03-08), those internals are |
worry about recursive lookups. In single-threaded mode, FUSE holds a global |
219 |
subject to changing anyway. Note that singlethreaded mode also means that |
lock on your filesystem, and will wait for one callback to return before |
220 |
you will not have to worry about reentrancy, though you will have to worry |
calling another. This can lead to deadlocks, if your script makes any attempt |
221 |
about recursive lookups (since the kernel holds a global lock on your |
to access files or directories in the filesystem it is providing. (This |
222 |
filesystem and blocks waiting for one callback to complete before calling |
includes calling stat() on the mount-point, statfs() calls from the 'df' |
223 |
another). |
command, and so on and so forth.) It is worth paying a little attention and |
224 |
|
being careful about this. |
225 |
I hope to add full multithreading functionality later, but for now, I |
|
226 |
recommend you leave this option at the default, 1 (which means |
Enabling multithreading will cause FUSE to make multiple simultaneous calls |
227 |
unthreaded, no threads will be used and no reentrancy is needed). |
into the various callback functions of your perl script. If you enable |
228 |
|
threaded mode, you can enjoy all the parallel execution and interactive |
229 |
|
response benefits of threads, and you get to enjoy all the benefits of race |
230 |
|
conditions and locking bugs, too. Please also ensure any other perl modules |
231 |
|
you're using are also thread-safe. |
232 |
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|
233 |
|
(If enabled, this option will cause a warning if your perl interpreter was not |
234 |
|
built with USE_ITHREADS, or if you have failed to use threads or |
235 |
|
threads::shared.) |
236 |
|
|
237 |
=back |
=back |
238 |
|
|
408 |
|
|
409 |
-ENOANO(), $namelen, $files, $files_free, $blocks, $blocks_avail, $blocksize |
-ENOANO(), $namelen, $files, $files_free, $blocks, $blocks_avail, $blocksize |
410 |
|
|
411 |
|
=head3 flush |
412 |
|
|
413 |
|
Arguments: Pathname |
414 |
|
Returns an errno or 0 on success. |
415 |
|
|
416 |
|
Called to synchronise any cached data. This is called before the file |
417 |
|
is closed. It may be called multiple times before a file is closed. |
418 |
|
|
419 |
|
=head3 release |
420 |
|
|
421 |
|
Arguments: Pathname, numeric flags passed to open |
422 |
|
Returns an errno or 0 on success. |
423 |
|
|
424 |
|
Called to indicate that there are no more references to the file. Called once |
425 |
|
for every file with the same pathname and flags as were passed to open. |
426 |
|
|
427 |
|
=head3 fsync |
428 |
|
|
429 |
|
Arguments: Pathname, numeric flags |
430 |
|
Returns an errno or 0 on success. |
431 |
|
|
432 |
|
Called to synchronise the file's contents. If flags is non-zero, |
433 |
|
only synchronise the user data. Otherwise synchronise the user and meta data. |
434 |
|
|
435 |
|
=head3 setxattr |
436 |
|
|
437 |
|
Arguments: Pathname, extended attribute's name, extended attribute's value, numeric flags (which is an OR-ing of XATTR_CREATE and XATTR_REPLACE |
438 |
|
Returns an errno or 0 on success. |
439 |
|
|
440 |
|
Called to set the value of the named extended attribute. |
441 |
|
|
442 |
|
If you wish to reject setting of a particular form of extended attribute name |
443 |
|
(e.g.: regexps matching user\..* or security\..*), then return - EOPNOTSUPP. |
444 |
|
|
445 |
|
If flags is set to XATTR_CREATE and the extended attribute already exists, |
446 |
|
this should fail with - EEXIST. If flags is set to XATTR_REPLACE |
447 |
|
and the extended attribute doesn't exist, this should fail with - ENOATTR. |
448 |
|
|
449 |
|
XATTR_CREATE and XATTR_REPLACE are provided by this module, but not exported |
450 |
|
by default. To import them: |
451 |
|
|
452 |
|
use Fuse ':xattr'; |
453 |
|
|
454 |
|
or: |
455 |
|
|
456 |
|
use Fuse ':all'; |
457 |
|
|
458 |
|
=head3 getxattr |
459 |
|
|
460 |
|
Arguments: Pathname, extended attribute's name |
461 |
|
Returns an errno, 0 if there was no value, or the extended attribute's value. |
462 |
|
|
463 |
|
Called to get the value of the named extended attribute. |
464 |
|
|
465 |
|
=head3 listxattr |
466 |
|
|
467 |
|
Arguments: Pathname |
468 |
|
Returns a list: 0 or more text strings (the extended attribute names), followed by a numeric errno (usually 0). |
469 |
|
|
470 |
|
=head3 removexattr |
471 |
|
|
472 |
|
Arguments: Pathname, extended attribute's name |
473 |
|
Returns an errno or 0 on success. |
474 |
|
|
475 |
=head1 AUTHOR |
=head1 AUTHOR |
476 |
|
|
477 |
Mark Glines, E<lt>mark@glines.orgE<gt> |
Mark Glines, E<lt>mark@glines.orgE<gt> |