Make virt-inspector look in more places for module aliases

[libguestfs.git] / inspector / virt-inspector.pl

diff --git a/inspector/virt-inspector.pl b/inspector/virt-inspector.pl
index c645cbd..8417675 100755 (executable)
--- a/inspector/virt-inspector.pl
+++ b/inspector/virt-inspector.pl
@@ -29,6 +29,7 @@ use File::Temp qw/tempdir/;
 eval "use Sys::Virt;";
 eval "use XML::XPath;";
 eval "use XML::XPath::XMLParser;";
+eval "use YAML::Any;";
 
 =encoding utf8
 
@@ -134,6 +135,11 @@ Produce no output at all.
 If you select I<--xml> then you get XML output which can be fed
 to other programs.
 
+=item B<--yaml>
+
+If you select I<--yaml> then you get YAML output which can be fed
+to other programs.
+
 =item B<--perl>
 
 If you select I<--perl> then you get Perl structures output which
@@ -183,6 +189,7 @@ GetOptions ("help|?" => \$help,
            "text" => sub { $output = "text" },
            "none" => sub { $output = "none" },
            "xml" => sub { $output = "xml" },
+           "yaml" => sub { $output = "yaml" },
            "perl" => sub { $output = "perl" },
            "fish" => sub { $output = "fish" },
            "guestfish" => sub { $output = "fish" },
@@ -206,8 +213,10 @@ if (-e $ARGV[0]) {
        }
     }
 } else {
-    die "no libvirt support (install Sys::Virt)"
-       unless exists $INC{"Sys/Virt.pm"};
+    die "virt-inspector: no libvirt support (install Sys::Virt, XML::XPath and XML::XPath::XMLParser)\n"
+       unless exists $INC{"Sys/Virt.pm"} &&
+       exists $INC{"XML/XPath.pm"} &&
+       exists $INC{"XML/XPath/XMLParser.pm"};
 
     pod2usage ("$0: too many domains listed on command line") if @ARGV > 1;
 
@@ -220,6 +229,13 @@ if (-e $ARGV[0]) {
     die "cannot connect to libvirt $uri\n" unless $vmm;
 
     my @doms = $vmm->list_defined_domains ();
+    my $isitinactive = "an inactive libvirt domain";
+    if ($output ne "fish") {
+       # In the special case where we want read-only access to
+       # a domain, allow the user to specify an active domain too.
+       push @doms, $vmm->list_domains ();
+       $isitinactive = "a libvirt domain";
+    }
     my $dom;
     foreach (@doms) {
        if ($_->get_name () eq $ARGV[0]) {
@@ -227,8 +243,7 @@ if (-e $ARGV[0]) {
            last;
        }
     }
-    die "$ARGV[0] is not the name of an inactive libvirt domain\n"
-       unless $dom;
+    die "$ARGV[0] is not the name of $isitinactive\n" unless $dom;
 
     # Get the names of the image(s).
     my $xml = $dom->get_xml_description ();
@@ -829,14 +844,47 @@ sub check_for_modprobe_aliases
     local $_;
     my $root_dev = shift;
 
-    my @lines;
-    eval { @lines = $g->read_lines ("/etc/modprobe.conf"); };
-    return if $@ || !@lines;
+    # Initialise augeas
+    my $success = 0;
+    $success = $g->aug_init("/", 16);
+
+    # Register /etc/modules.conf and /etc/conf.modules to the Modprobe lens
+    my @results;
+    @results = $g->aug_match("/augeas/load/Modprobe/incl");
+
+    # Calculate the next index of /augeas/load/Modprobe/incl
+    my $i = 1;
+    foreach ( @results ) {
+        next unless m{/augeas/load/Modprobe/incl\[(\d*)]};
+        $i = $1 + 1 if ($1 == $i);
+    }
+
+    $success = $g->aug_set("/augeas/load/Modprobe/incl[$i]",
+                           "/etc/modules.conf");
+    $i++;
+    $success = $g->aug_set("/augeas/load/Modprobe/incl[$i]",
+                                  "/etc/conf.modules");
+
+    # Make augeas reload
+    $success = $g->aug_load();
 
     my %modprobe_aliases;
 
-    foreach (@lines) {
-       $modprobe_aliases{$1} = $2 if /^\s*alias\s+(\S+)\s+(\S+)/;
+    for my $pattern qw(/files/etc/conf.modules/alias
+                       /files/etc/modules.conf/alias
+                       /files/etc/modprobe.conf/alias
+                       /files/etc/modprobe.d/*/alias) {
+        @results = $g->aug_match($pattern);
+
+        for my $path ( @results ) {
+            my $alias;
+            $alias = $g->aug_get($path);
+
+            my $modulename;
+            $modulename = $g->aug_get($path.'/modulename');
+
+            $modprobe_aliases{$alias} = $modulename;
+        }
     }
 
     $oses{$root_dev}->{modprobe_aliases} = \%modprobe_aliases;
@@ -922,6 +970,14 @@ elsif ($output eq "perl") {
     print Dumper(\%oses);
 }
 
+# YAML output
+elsif ($output eq "yaml") {
+    die "virt-inspector: no YAML support\n"
+       unless exists $INC{"YAML/Any.pm"};
+    
+    print Dump(\%oses);
+}
+
 # Plain text output (the default).
 elsif ($output eq "text") {
     output_text ();