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

Contents of /perl/trunk/examples/loopback_t.pl

Parent Directory Parent Directory | Revision Log Revision Log


Revision 42 - (show annotations)
Mon Jan 2 22:51:57 2006 UTC (16 years, 7 months ago) by dpavlin
File MIME type: text/plain
File size: 3606 byte(s)
use version just built

1 #!/usr/bin/perl -w
2 use strict;
3 use threads;
4 use threads::shared;
5
6 use blib;
7 use Fuse;
8 use IO::File;
9 use POSIX qw(ENOENT ENOSYS EEXIST EPERM O_RDONLY O_RDWR O_APPEND O_CREAT);
10 use Fcntl qw(S_ISBLK S_ISCHR S_ISFIFO SEEK_SET);
11 require 'syscall.ph'; # for SYS_mknod and SYS_lchown
12
13 sub fixup { return "/tmp/fusetest-" . $ENV{LOGNAME} . shift }
14
15 sub x_getattr {
16 my ($file) = fixup(shift);
17 my (@list) = lstat($file);
18 return -$! unless @list;
19 return @list;
20 }
21
22 sub x_getdir {
23 my ($dirname) = fixup(shift);
24 unless(opendir(DIRHANDLE,$dirname)) {
25 return -ENOENT();
26 }
27 my (@files) = readdir(DIRHANDLE);
28 closedir(DIRHANDLE);
29 return (@files, 0);
30 }
31
32 sub x_open {
33 my ($file) = fixup(shift);
34 my ($mode) = shift;
35 return -$! unless sysopen(FILE,$file,$mode);
36 close(FILE);
37 return 0;
38 }
39
40 sub x_read {
41 my ($file,$bufsize,$off) = @_;
42 my ($rv) = -ENOSYS();
43 my ($handle) = new IO::File;
44 return -ENOENT() unless -e ($file = fixup($file));
45 my ($fsize) = -s $file;
46 return -ENOSYS() unless open($handle,$file);
47 if(seek($handle,$off,SEEK_SET)) {
48 read($handle,$rv,$bufsize);
49 }
50 return $rv;
51 }
52
53 sub x_write {
54 my ($file,$buf,$off) = @_;
55 my ($rv);
56 return -ENOENT() unless -e ($file = fixup($file));
57 my ($fsize) = -s $file;
58 return -ENOSYS() unless open(FILE,'+<',$file);
59 if($rv = seek(FILE,$off,SEEK_SET)) {
60 $rv = print(FILE $buf);
61 }
62 $rv = -ENOSYS() unless $rv;
63 close(FILE);
64 return length($buf);
65 }
66
67 sub err { return (-shift || -$!) }
68
69 sub x_readlink { return readlink(fixup(shift)); }
70 sub x_unlink { return unlink(fixup(shift)) ? 0 : -$!; }
71
72 sub x_symlink { print "symlink\n"; return symlink(shift,fixup(shift)) ? 0 : -$!; }
73
74 sub x_rename {
75 my ($old) = fixup(shift);
76 my ($new) = fixup(shift);
77 my ($err) = rename($old,$new) ? 0 : -ENOENT();
78 return $err;
79 }
80 sub x_link { return link(fixup(shift),fixup(shift)) ? 0 : -$! }
81 sub x_chown {
82 my ($fn) = fixup(shift);
83 print "nonexistent $fn\n" unless -e $fn;
84 my ($uid,$gid) = @_;
85 # perl's chown() does not chown symlinks, it chowns the symlink's
86 # target. it fails when the link's target doesn't exist, because
87 # the stat64() syscall fails.
88 # this causes error messages when unpacking symlinks in tarballs.
89 my ($err) = syscall(&SYS_lchown,$fn,$uid,$gid,$fn) ? -$! : 0;
90 return $err;
91 }
92 sub x_chmod {
93 my ($fn) = fixup(shift);
94 my ($mode) = shift;
95 my ($err) = chmod($mode,$fn) ? 0 : -$!;
96 return $err;
97 }
98 sub x_truncate { return truncate(fixup(shift),shift) ? 0 : -$! ; }
99 sub x_utime { return utime($_[1],$_[2],fixup($_[0])) ? 0:-$!; }
100
101 sub x_mkdir { my ($name, $perm) = @_; return 0 if mkdir(fixup($name),$perm); return -$!; }
102 sub x_rmdir { return 0 if rmdir fixup(shift); return -$!; }
103
104 sub x_mknod {
105 # since this is called for ALL files, not just devices, I'll do some checks
106 # and possibly run the real mknod command.
107 my ($file, $modes, $dev) = @_;
108 $file = fixup($file);
109 $! = 0;
110 syscall(&SYS_mknod,$file,$modes,$dev);
111 return -$!;
112 }
113
114 # kludge
115 sub x_statfs {return 255,1000000,500000,1000000,500000,4096}
116 my ($mountpoint) = "";
117 $mountpoint = shift(@ARGV) if @ARGV;
118 Fuse::main(
119 mountpoint=>$mountpoint,
120 getattr =>"main::x_getattr",
121 readlink=>"main::x_readlink",
122 getdir =>"main::x_getdir",
123 mknod =>"main::x_mknod",
124 mkdir =>"main::x_mkdir",
125 unlink =>"main::x_unlink",
126 rmdir =>"main::x_rmdir",
127 symlink =>"main::x_symlink",
128 rename =>"main::x_rename",
129 link =>"main::x_link",
130 chmod =>"main::x_chmod",
131 chown =>"main::x_chown",
132 truncate=>"main::x_truncate",
133 utime =>"main::x_utime",
134 open =>"main::x_open",
135 read =>"main::x_read",
136 write =>"main::x_write",
137 statfs =>"main::x_statfs",
138 threaded=>1,
139 );

  ViewVC Help
Powered by ViewVC 1.1.26