/[fuse.before_github]/perl-llin/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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Contents of /perl-llin/examples/rmount.pl

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Revision 21 - (show annotations)
Mon Jan 2 19:50:33 2006 UTC (15 years, 9 months ago) by dpavlin
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1 #!/usr/bin/perl -w
2
3 # This example needs some work before it can support threads.
4 use strict;
5 use Net::SSH 'sshopen2';
6 use IPC::Open2;
7 use Fuse;
8 use Data::Dumper;
9
10 my ($host, $dir, $mount) = @ARGV;
11 if(!defined($mount)) {
12 $mount = $dir;
13 if($host =~ /^(.*):(.*)$/) {
14 ($host,$dir) = ($1,$2);
15 } else {
16 die "usage: $0 user\@host remotedir mountpoint\n".
17 "or : $0 user\@host:remotedir mountpoint\n";
18 }
19 }
20
21 `umount $mount` unless -d $mount;
22 die "mountpoint $mount isn't a directory!\n" unless -d $mount;
23
24 my (%args) = (mountpoint => $mount);
25
26 map { my ($str) = $_; $args{$str} = sub { netlink($str,@_) } }
27 qw(getattr getdir open read write readlink unlink rmdir
28 symlink rename link chown chmod truncate utime mkdir
29 rmdir mknod statfs);
30
31 sub connect_remote {
32 sshopen2($host, *READER, *WRITER, "./rmount_remote.pl $dir")
33 or die "ssh: $!\n";
34 select WRITER;
35 $| = 1;
36 select STDOUT;
37 }
38
39 $SIG{CHLD} = sub {
40 use POSIX ":sys_wait_h";
41 my $kid;
42 do {
43 $kid = waitpid(-1,WNOHANG);
44 } until $kid < 1;
45 };
46
47 connect_remote;
48
49 sub netlink {
50 my ($str) = Dumper(\@_)."\n";
51 $str = sprintf("%08i\n%s",length($str),$str);
52 while(1) { # retry as necessary
53 my ($VAR1);
54 $VAR1 = undef;
55 eval {
56 local $SIG{ALRM} = sub { die "timeout\n" };
57 alarm 10;
58 print WRITER $str;
59 my ($len, $data);
60 $data = '';
61 if(sysread(READER,$len,9) == 9) {
62 sysread(READER,$data,$len-length($data),length($data))
63 while(length($data) < $len);
64 eval $data;
65 }
66 alarm 0;
67 };
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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