fix permissions

[perl-fuse.git] / examples / loopback.pl

diff --git a/examples/loopback.pl b/examples/loopback.pl
old mode 100644 (file)
new mode 100755 (executable)
index bdc8c22..81ee2e1
--- a/examples/loopback.pl
+++ b/examples/loopback.pl
@@ -1,13 +1,38 @@
-#!/usr/bin/perl
-
+#!/usr/bin/perl -w
 use strict;
+
+use blib;
 use Fuse;
 use IO::File;
 use POSIX qw(ENOENT ENOSYS EEXIST EPERM O_RDONLY O_RDWR O_APPEND O_CREAT);
 use Fcntl qw(S_ISBLK S_ISCHR S_ISFIFO SEEK_SET);
-require 'syscall.ph'; # for SYS_mknod and SYS_lchown
+my $can_syscall = eval {
+       require 'syscall.ph'; # for SYS_mknod and SYS_lchown
+};
+if (!$can_syscall && open my $fh, '<', '/usr/include/sys/syscall.h') {
+       local $/ = undef;
+       my %sys = do { local $/ = undef;
+                       <$fh> =~ m/\#define \s+ (\w+) \s+ (\d+)/gxms;
+        };
+       close $fh;
+       if ($sys{SYS_mknod} && $sys{SYS_lchown}) {
+               *SYS_mknod  = sub { $sys{SYS_mknod}  };
+               *SYS_lchown = sub { $sys{SYS_lchown} };
+               $can_syscall = 1;
+       }
+}
 
-sub fixup { return "/tmp/fusetest" . shift }
+my $tmp = -d '/private' ? '/private/tmp' : '/tmp';
+my $tmp_path = "$tmp/fusetest-" . $ENV{LOGNAME};
+if (! -e $tmp_path) {
+       mkdir($tmp_path) || die "can't create $tmp_path: $!";
+}
+
+sub fixup { print STDERR "fixup $_[0] from @{[caller]}\n";
+            my ($path) = @_;
+            return $tmp_path if $path eq '/';
+            return $tmp_path . $path;
+}
 
 sub x_getattr {
        my ($file) = fixup(shift);
@@ -63,9 +88,8 @@ sub x_write {
 
 sub err { return (-shift || -$!) }
 
-sub x_readlink { return readlink(fixup(shift)                 ); }
-sub x_unlink { return unlink(fixup(shift)) ? 0 : -$!;          }
-sub x_rmdir { return err(rmdir(fixup(shift))               ); }
+sub x_readlink { return readlink(fixup(shift));         }
+sub x_unlink   { return unlink(fixup(shift)) ? 0 : -$!; }
 
 sub x_symlink { print "symlink\n"; return symlink(shift,fixup(shift)) ? 0 : -$!; }
 
@@ -77,6 +101,7 @@ sub x_rename {
 }
 sub x_link { return link(fixup(shift),fixup(shift)) ? 0 : -$! }
 sub x_chown {
+       return -ENOSYS() if ! $can_syscall;
        my ($fn) = fixup(shift);
        print "nonexistent $fn\n" unless -e $fn;
        my ($uid,$gid) = @_;
@@ -100,6 +125,7 @@ sub x_mkdir { my ($name, $perm) = @_; return 0 if mkdir(fixup($name),$perm); ret
 sub x_rmdir { return 0 if rmdir fixup(shift); return -$!; }
 
 sub x_mknod {
+       return -ENOSYS() if ! $can_syscall;
        # since this is called for ALL files, not just devices, I'll do some checks
        # and possibly run the real mknod command.
        my ($file, $modes, $dev) = @_;
@@ -115,22 +141,24 @@ my ($mountpoint) = "";
 $mountpoint = shift(@ARGV) if @ARGV;
 Fuse::main(
        mountpoint=>$mountpoint,
-       getattr=>\&x_getattr,
-       readlink=>\&x_readlink,
-       getdir=>\&x_getdir,
-       mknod=>\&x_mknod,
-       mkdir=>\&x_mkdir,
-       unlink=>\&x_unlink,
-       rmdir=>\&x_rmdir,
-       symlink=>\&x_symlink,
-       rename=>\&x_rename,
-       link=>\&x_link,
-       chmod=>\&x_chmod,
-       chown=>\&x_chown,
-       truncate=>\&x_truncate,
-       utime=>\&x_utime,
-       open=>\&x_open,
-       read=>\&x_read,
-       write=>\&x_write,
-       statfs=>\&x_statfs,
+       getattr =>"main::x_getattr",
+       readlink=>"main::x_readlink",
+       getdir  =>"main::x_getdir",
+       mknod   =>"main::x_mknod",
+       mkdir   =>"main::x_mkdir",
+       unlink  =>"main::x_unlink",
+       rmdir   =>"main::x_rmdir",
+       symlink =>"main::x_symlink",
+       rename  =>"main::x_rename",
+       link    =>"main::x_link",
+       chmod   =>"main::x_chmod",
+       chown   =>"main::x_chown",
+       truncate=>"main::x_truncate",
+       utime   =>"main::x_utime",
+       open    =>"main::x_open",
+       read    =>"main::x_read",
+       write   =>"main::x_write",
+       statfs  =>"main::x_statfs",
+       threaded=>0,
+       debug => 1,
 );