Cast the 'cmd' argument as unsigned.

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

diff --git a/examples/fioc.pl b/examples/fioc.pl
index 031067b..811cb80 100755 (executable)
--- a/examples/fioc.pl
+++ b/examples/fioc.pl
@@ -3,59 +3,34 @@
 use strict;
 no strict qw(refs);
 
-use Carp ();
+use threads;
+use threads::shared;
+
+use Carp;
 local $SIG{'__WARN__'} = \&Carp::cluck;
 
 use Fuse;
 use Fcntl qw(:mode);
-use Errno qw(:POSIX);
 use POSIX;
 
-my $fioc_size = 0;
+my $fioc_size :shared = 0;
 use constant FIOC_NAME => 'fioc';
-my $fioc_buf = '';
+my $fioc_buf :shared = '';
 use constant FIOC_NONE  => 0;
 use constant FIOC_ROOT  => 1;
 use constant FIOC_FILE  => 2;
 
-sub _IOC_NRBITS  { 8 }
-sub _IOC_NRMASK  { ( 1 << &_IOC_NRBITS ) - 1 }
-sub _IOC_NRSHIFT { 0 }
-
-sub _IOC_TYPEBITS  { 8 }
-sub _IOC_TYPEMASK  { ( 1 << &_IOC_TYPEBITS ) - 1 }
-sub _IOC_TYPESHIFT { &_IOC_NRSHIFT + &_IOC_NRBITS }
-
-sub _IOC_SIZEBITS { ( POSIX::uname() )[4] =~ /^i[3-6]86|x86_64$/ ? 14 : 13 }
-sub _IOC_SIZEMASK  { ( 1 << &_IOC_SIZEBITS ) - 1 }
-sub _IOC_SIZESHIFT { &_IOC_TYPESHIFT + &_IOC_TYPEBITS }
+require 'asm/ioctl.ph';
 
-sub _IOC_DIRBITS  { 32 - &_IOC_NRBITS - &_IOC_TYPEBITS - &_IOC_SIZEBITS }
-sub _IOC_DIRMASK  { ( 1 << &_IOC_DIRBITS ) - 1 }
-sub _IOC_DIRSHIFT { &_IOC_SIZESHIFT + &_IOC_SIZEBITS }
-
-sub _IOC_NONE  { ( POSIX::uname() )[4] =~ /^i[3-6]86|x86_64$/ ? 0 : 1 }
-sub _IOC_WRITE { ( POSIX::uname() )[4] =~ /^i[3-6]86|x86_64$/ ? 1 : 4 }
-sub _IOC_READ  { ( POSIX::uname() )[4] =~ /^i[3-6]86|x86_64$/ ? 2 : 2 }
-
-sub _IOC ($$$$) {
-  ( $_[0] << &_IOC_DIRSHIFT ) |  ( ord( $_[1] ) << &_IOC_TYPESHIFT ) |
-    ( $_[2] << &_IOC_NRSHIFT ) | ( $_[3] << &_IOC_SIZESHIFT );
-}
-
-sub _IO ($$)    { &_IOC( &_IOC_NONE,               $_[0], $_[1], 0 ) }
-sub _IOR ($$$)  { &_IOC( &_IOC_READ,               $_[0], $_[1], $_[2] ) }
-sub _IOW ($$$)  { &_IOC( &_IOC_WRITE,              $_[0], $_[1], $_[2] ) }
-sub _IOWR ($$$) { &_IOC( &_IOC_READ | &_IOC_WRITE, $_[0], $_[1], $_[2] ) }
-
-sub FIOC_GET_SIZE { _IOR('E', 0, 4); }
-sub FIOC_SET_SIZE { _IOW('E', 1, 4); }
+our %sizeof = ('int' => 4);
+sub FIOC_GET_SIZE { _IOR(ord 'E', 0, 'int'); }
+sub FIOC_SET_SIZE { _IOW(ord 'E', 1, 'int'); }
 
 sub fioc_resize {
     my ($size) = @_;
     print 'called ', (caller(0))[3], "\n";
     return 0 if $size == $fioc_size;
-    
+
     if ($size < $fioc_size) {
         $fioc_buf = substr($fioc_buf, 0, $size);
     }
@@ -138,6 +113,7 @@ sub fioc_read {
 sub fioc_write {
     my ($path, $data, $offset) = @_;
     print 'called ', (caller(0))[3], "\n";
+    lock($fioc_buf);
 
     return -&EINVAL if fioc_file_type($path) != FIOC_FILE;
 
@@ -152,6 +128,7 @@ sub fioc_write {
 sub fioc_truncate {
     my ($path, $size) = @_;
     print 'called ', (caller(0))[3], "\n";
+    lock($fioc_buf);
 
     return -&EINVAL if fioc_file_type($path) != FIOC_FILE;
 
@@ -170,19 +147,16 @@ sub fioc_readdir {
 sub fioc_ioctl {
     my ($path, $cmd, $flags, $data) = @_;
     print 'called ', (caller(0))[3], "\n";
-    $cmd = unpack('L', pack('l', $cmd));
 
-    print("fioc_ioctl(): path is \"$path\", cmd is $cmd, flags is $flags\n");
     return -&EINVAL if fioc_file_type($path) != FIOC_FILE;
 
     return -&ENOSYS if $flags & 0x1;
 
     if ($cmd == FIOC_GET_SIZE) {
-        print "handling FIOC_GET_SIZE\n";
         return(0, pack('L', $fioc_size));
     }
     elsif ($cmd == FIOC_SET_SIZE) {
-        print "handling FIOC_SET_SIZE\n";
+        lock($fioc_buf);
         fioc_resize(unpack('L', $data));
         return 0;
     }
@@ -200,4 +174,5 @@ Fuse::main(
     'open'      => 'main::fioc_open',
     'read'      => 'main::fioc_read',
     'write'     => 'main::fioc_write',
-    'ioctl'     => 'main::fioc_ioctl');
+    'ioctl'     => 'main::fioc_ioctl',
+    'threaded'  => 1);