/[fuse.before_github]/perl/trunk/examples/rmount.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Annotation of /perl/trunk/examples/rmount.pl

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Revision 4 - (hide annotations)
Thu Nov 11 14:44:15 2004 UTC (18 years, 3 months ago) by mszeredi
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File size: 1696 byte(s)
Initial revision

1 mszeredi 4 #!/usr/bin/perl
2    
3     use strict;
4     use Net::SSH 'sshopen2';
5     use IPC::Open2;
6     use Fuse;
7     use Data::Dumper;
8    
9     my ($host, $dir, $mount) = @ARGV;
10     if(!defined($mount)) {
11     $mount = $dir;
12     if($host =~ /^(.*):(.*)$/) {
13     ($host,$dir) = ($1,$2);
14     } else {
15     die "usage: $0 user\@host remotedir mountpoint\n".
16     "or : $0 user\@host:remotedir mountpoint\n";
17     }
18     }
19    
20     `umount $mount` unless -d $mount;
21     die "mountpoint $mount isn't a directory!\n" unless -d $mount;
22    
23     my (%args) = (mountpoint => $mount);
24    
25     map { my ($str) = $_; $args{$str} = sub { netlink($str,@_) } }
26     qw(getattr getdir open read write readlink unlink rmdir
27     symlink rename link chown chmod truncate utime mkdir
28     rmdir mknod statfs);
29    
30     sub connect_remote {
31     sshopen2($host, *READER, *WRITER, "./rmount_remote.pl $dir")
32     or die "ssh: $!\n";
33     select WRITER;
34     $| = 1;
35     select STDOUT;
36     }
37    
38     $SIG{CHLD} = sub {
39     use POSIX ":sys_wait_h";
40     my $kid;
41     do {
42     $kid = waitpid(-1,WNOHANG);
43     } until $kid < 1;
44     };
45    
46     connect_remote;
47    
48     sub netlink {
49     my ($str) = Dumper(\@_)."\n";
50     $str = sprintf("%08i\n%s",length($str),$str);
51     while(1) { # retry as necessary
52     my ($sig) = $SIG{ALRM};
53     my ($VAR1);
54     $VAR1 = undef;
55     eval {
56     $SIG{ALRM} = sub { die "timeout\n" };
57     alarm 10;
58     print WRITER $str;
59     my ($len, $data);
60     if(read(READER,$len,9) == 9) {
61     read(READER,$data,$len-length($data),length($data))
62     while(length($data) < $len);
63     eval $data;
64     }
65     };
66     alarm 0;
67     $SIG{ALRM} = $sig;
68     if(defined $VAR1) {
69     return wantarray ? @{$VAR1} : $$VAR1[0];
70     }
71     print STDERR "failed to send command; reconnecting ssh\n";
72     close(READER);
73     close(WRITER);
74     connect_remote();
75     }
76     }
77    
78     Fuse::main(%args);
79    
80     netlink("bye");
81     close(READER);
82     close(WRITER);

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