So I was having problems running the cool Cluster SSH script under Ubuntu Dapper. Specifically, I was running clusterssh version 3.18.1-1ubuntu2 with libx11-protocol-perl version 0.54-2.
The problem I was seeing was something like the following message with no other information -- even in debug mode.
Can't read: at /usr/share/perl5/X11/Protocol.pm line 2303
The problem turned out to be actually on line 2306 with the importing of X11::Auth and a bug in that module. Here's a patch which fixes the problem:
*** /usr/share/perl5/X11/Auth.pm.ORG Thu Sep 14 12:20:30 2006 --- /usr/share/perl5/X11/Auth.pm Thu Sep 14 13:28:30 2006 *************** *** 56,71 **** push @a, $type; $x = unpack("n", $self->read(2)); # Address ! push @a, $self->read($x); $x = unpack("n", $self->read(2)); # Display `number' ! push @a, $self->read($x); $x = unpack("n", $self->read(2)); # Authorization name ! push @a, $self->read($x); $x = unpack("n", $self->read(2)); # Authorization data ! push @a, $self->read($x); return @a; } --- 56,71 ---- push @a, $type; $x = unpack("n", $self->read(2)); # Address ! push @a, ($x == 0 ? "" : $self->read($x)); $x = unpack("n", $self->read(2)); # Display `number' ! push @a, ($x == 0 ? "" : $self->read($x)); $x = unpack("n", $self->read(2)); # Authorization name ! push @a, ($x == 0 ? "" : $self->read($x)); $x = unpack("n", $self->read(2)); # Authorization data ! push @a, ($x == 0 ? "" : $self->read($x)); return @a; }
Basically, this perl module is trying to read your .Xauthority file in your home directory, and was trying to do a read of 0 bytes on one of the fields which it was not handling appropriately.
Hope this helps.
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