From 8cd87b3d2746da3ff0e0b67d7c09e89aa1f6fa15 Mon Sep 17 00:00:00 2001
From: dakkar <dakkar@thenautilus.net>
Date: Tue, 1 Sep 2009 17:00:31 +0200
Subject: initial import

---
 hal-automounter.pl | 194 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 194 insertions(+)
 create mode 100755 hal-automounter.pl

diff --git a/hal-automounter.pl b/hal-automounter.pl
new file mode 100755
index 0000000..2ea4133
--- /dev/null
+++ b/hal-automounter.pl
@@ -0,0 +1,194 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+use lib '/home/dakkar/perl5/lib/perl5','/home/dakkar/perl5/lib/perl5/x86_64-linux-thread-multi';
+
+use Net::DBus;
+use Net::DBus::Reactor;
+use File::Temp;
+use Cwd 'realpath';
+
+sub add_to_fstab {
+    my ($dev_path,$mount_point,$fs_type,$opts)=@_;
+
+    my @orig_stat=stat('/etc/fstab');
+    my $tfh=File::Temp->new(DIR=>'/etc');
+    $tfh->unlink_on_destroy(1);
+
+    while(1) {
+        seek $tfh,0,0;
+        truncate $tfh,0;
+        open my $in_fh,'<','/etc/fstab';
+        while (my $line=<$in_fh>) {
+            next if $line =~ m{\A \s* \#}smx;
+            my ($in_dev,$in_path,$in_fs,$in_opts)=
+                ($line=~m{\A \s* (\S+) \s+ (\S+) \s+ (\S+) \s+ (\S+) }smx)
+                    or next;
+            if (-e $in_dev
+                    && (realpath($in_dev) eq realpath($dev_path))) {
+                # it's already in there, abort
+                return $in_path;
+            }
+        }
+        continue {
+            print {$tfh} $line;
+        };
+        print {$tfh} "$dev_path $mount_point $fs_type $opts 0 0 # dakkar\n";
+        if ((stat('/etc/fstab'))[9] == $orig_stat[9]) {
+            rename "$tfh",'/etc/fstab';
+            chmod $orig_stat[2],'/etc/fstab';
+            chown @orig_stat[4,5],'/etc/fstab';
+            return;
+        }
+        # fstab has changed, re-run the whole thing
+    }
+}
+
+sub remove_from_fstab {
+    my ($mount_point)=@_;
+
+    my @orig_stat=stat('/etc/fstab');
+    my $tfh=File::Temp->new(DIR=>'/etc');
+    $tfh->unlink_on_destroy(1);
+
+    my $was_there=0;
+
+    while(1) {
+        seek $tfh,0,0;
+        truncate $tfh,0;
+        open my $in_fh,'<','/etc/fstab';
+        while (my $line=<$in_fh>) {
+            next if $line =~ m{\A \s* \#}smx;
+            my ($in_dev,$in_path,$in_fs,$in_opts,$comms)=
+                ($line=~m{\A \s* (\S+) \s+ (\S+) \s+ (\S+) \s+ (\S+) \s+ \d+ \s+ \d+ (?: \s* \# (.*) )?}smx);
+            if (defined($comms) && ($comms eq " dakkar\n")
+                    && ($in_path eq $mount_point)) {
+                # ok, it's the right line, kill it
+                $line='';$was_there=1;
+            }
+        }
+        continue {
+            print {$tfh} $line;
+        };
+        if ((stat('/etc/fstab'))[9] == $orig_stat[9]) {
+            rename "$tfh",'/etc/fstab';
+            chmod $orig_stat[2],'/etc/fstab';
+            chown @orig_stat[4,5],'/etc/fstab';
+            return 1 if $was_there;
+            return;
+        }
+        # fstab has changed, re-run the whole thing
+    }
+}
+
+my $bus=Net::DBus->system();
+my $hal=$bus->get_service('org.freedesktop.Hal');
+
+my %ignore;my %mounted;
+
+sub sanitize {
+    my ($path)=@_;
+
+    $path=~s{\s}{-}g;
+    $path=~s{/+}{_}g;
+
+    return $path;
+}
+
+sub safe_get_property {
+    my ($dev,$prop)=@_;
+
+    local $@;
+    return eval {$dev->GetProperty($prop)}
+}
+
+sub device_added {
+    my $dev=$hal->get_object($_[0],'org.freedesktop.Hal.Device');
+    my $caps=safe_get_property($dev,'info.capabilities');
+    return unless $caps;
+    my %caps;@caps{@$caps}=();
+
+    if (exists($caps{storage})) {
+        my $should_automount=
+            safe_get_property($dev,'storage.automount_enabled_hint');
+        if (!$should_automount) {
+            $ignore{$_[0]}=1;
+        }
+        return;
+    }
+
+    if (exists($caps{volume})) {
+
+        my $parent=safe_get_property($dev,'info.parent');
+
+        if ($ignore{$parent}) {
+            warn "ignoring $_[0]\n";
+            return;
+        }
+
+        if (safe_get_property($dev,'volume.ignore')) {
+            warn "ignoring $_[0]\n";
+            return;
+        }
+
+        my $uuid=safe_get_property($dev,'volume.uuid');
+
+        my $dev_path=safe_get_property($dev,'linux.device_file')
+            ||safe_get_property($dev,'volume.linux.device_file')
+            ||($uuid?'/dev/disk/by-uuid/'.$uuid:undef)
+            || 'unknown';
+        if ($dev_path eq 'unknown') {
+            warn "unknown path for $_[0]\n";
+            return;
+        }
+
+        my $usage=safe_get_property($dev,'volume.fsusage');
+        return unless $usage eq 'filesystem';
+
+        my $label=safe_get_property($dev,'volume.label');
+
+        my $fstype=safe_get_property($dev,'volume.fstype');
+
+        return unless defined $fstype;
+
+        my $mountpoint='/mnt/'.(sanitize($label)||$uuid);
+
+        if (-e $mountpoint) {
+            $mountpoint.='-0';
+            while (-e $mountpoint) {++$mountpoint};
+        }
+
+        my $manual_mountpoint=add_to_fstab($dev_path,$mountpoint,$fstype,'users,noauto,noatime,nodiratime,nosuid,nodev');
+
+        $mountpoint=$manual_mountpoint if defined $manual_mountpoint;
+
+        $mounted{$_[0]}=$mountpoint;
+        mkdir $mountpoint;
+        chown -1,scalar(getgrnam('plugdev')),$mountpoint;
+        chmod 0775,$mountpoint;
+    }
+
+    return;
+}
+
+sub device_removed {
+    delete $ignore{$_[0]};
+    if (exists $mounted{$_[0]}) {
+        system('umount',$mounted{$_[0]});
+        if (remove_from_fstab($mounted{$_[0]})) {
+            rmdir $mounted{$_[0]};
+        }
+        delete $mounted{$_[0]};
+    }
+    return;
+}
+
+my $reactor=Net::DBus::Reactor->main();
+
+my $manager = $hal->get_object('/org/freedesktop/Hal/Manager',
+                               'org.freedesktop.Hal.Manager');
+
+$manager->connect_to_signal('DeviceAdded',\&device_added);
+$manager->connect_to_signal('DeviceRemoved',\&device_removed);
+
+$reactor->run();
-- 
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