Changeset 3224 in MondoRescue for branches/3.2/MondoRescue/lib/MondoRescue

Timestamp:

Dec 30, 2013, 10:46:29 AM (10 years ago)

Author:

Bruno Cornec

Message:

• mr_file_read_all_link seems to be working correctly now.
• test file for the latest mr functions (mr-process-ldd and mr-read-all-link)

File:

• branches/3.2/MondoRescue/lib/MondoRescue/File.pm (modified) (3 diffs)

branches/3.2/MondoRescue/lib/MondoRescue/File.pm

@@ -13 +13 @@
 use Data::Dumper;
 use English;
-use File::Find;
-use Cwd;
+#use File::Basename;
 use lib qw (lib);
 
@@ -25 +24 @@
 
 our @ISA = qw(Exporter);
-our @EXPORT = qw(mr_file_read_all_link);
+our @EXPORT = qw(mr_file_read_all_link mr_file_process_ldd);
 
 =pod
@@ -48 +47 @@
 =cut
 
-# Cf: http://www.stonehenge.com/merlyn/UnixReview/col27.html
 sub mr_file_read_all_link {
 
-my $dir = cwd;
-my $link;
+# TODO: Can be parallelized
+my %files;
 
-find sub {
-    return unless -l;
-    my @right = split /\//, $File::Find::name;
-    my @left = do {
-        @right && ($right[0] eq "") ?
-        shift @right :            # quick way
-        split /\//, $dir;
-    };    # first element always null
-    while (@right) {
-        my $item = shift @right;
-        next if $item eq "." or $item eq "";
-        if ($item eq "..") {
-            pop @left if @left > 1;
-            next;
-        }
-        my $link = readlink(join "/", @left, $item);
+foreach my $f (@_) {
+    print "Processing $f**\n";
+    # Normalize the path if with .. in it or //
+    $f =~ s|([^/]*)/([^/]+)/\.\./([^/]+)|$1/$3|g;
+    $f =~ s|//|/|g;
+    my @fullpath = split(/\//,$f);
+    my $curdir = "";
+    while (@fullpath) {
+        my $dir = shift @fullpath;
+        print "curdir is now: $curdir** and dir: $dir**\n";
+        next if (($dir eq ".") || ($dir eq ""));
+        my $link = readlink("$curdir/$dir");
         if (defined $link) {
-            my @parts = split /\//, $link;
-            if (@parts && ($parts[0] eq "")) { # absolute
-                @left = shift @parts;   # quick way
+            # It's a real symlink so handle it
+            if (defined $files{$f}) {
+                $files{$f} .= "$curdir/$dir|";
+            } else {
+                $files{$f} = "$curdir/$dir|";
             }
-            unshift @right, @parts;
-            next;
+            if (substr($link,0,1) eq "/") {
+                $curdir = $link;
+            } else {
+                my $dn = "";
+                $dn = $curdir if ($curdir ne "");
+                $curdir = "$dn/$link";
+            }
+            if ((! -d $curdir) || (-l $curdir)) {
+                my $h = mr_file_read_all_link($curdir);
+                print "File: $curdir - Return:\n".Dumper($h)."\n";
+                foreach my $k (keys %$h) {
+                    $files{$f} .= $h->{$k}."|";
+                }
+            }
         } else {
-            push @left, $item;
-            next;
+            $curdir .= "/$dir";
         }
     }
-    #print "$File::Find::name is ", join("/", @left), "\n";
-    $link = join("/", @left);
-}, @_;
-return($link);
+    $files{$f} .= "$curdir";
 }
+return(\%files);
+}
+
+=over 4
+
+=item B<mr_file_process_ldd>
+
+This function keeps track of the dependencies of a binary with its dynamic libraries by analyzing the return of ldd on that binary and recursing on all the dependencies to provide the complete list of files needed to have this binary run in a mindi or chroot context
+It takes a list of parameters which are the path of the binaries to analyze and for which we want its dependencies to be included
+
+=cut
+
+sub mr_file_process_ldd {
+
+my %files;
+
+foreach my $f (@_) {
+    open(CMD,"ldd $f 2> /dev/null |") || die "You need ldd for mindi support";
+    # Format is something like this:
+    #  linux-vdso.so.1 (0x00007fff7c0ee000)
+    #  libtermcap.so.2 => /lib64/libtermcap.so.2 (0x00007ff1f0b1b000)
+    #  libdl.so.2 => /lib64/libdl.so.2 (0x00007ff1f0917000)
+    #  libc.so.6 => /lib64/libc.so.6 (0x00007ff1f0564000)
+    #  /lib64/ld-linux-x86-64.so.2 (0x00007ff1f0d1f000)
+    my $answer = undef;
+    while (<CMD>) {
+        my ($empty,$orig,$symb,$dest,$hexa) = split(/\s+/);
+        # print "**$orig**$symb**$dest**$hexa\n";
+        $answer = $orig if ($orig =~ /^\//);
+        $answer = $dest if ((defined $dest) && ($dest =~ /^\//));
+        $files{$answer} = $answer if (defined $answer);
+    }
+}
+close(CMD);
+
+return(\%files);
+}
+
+=back
+
+=head1 WEB SITES
+
+The main Web site of the project is available at L<http://www.mondorescue.org>. Bug reports should be filled using the trac instance of the project at L<http://trac.mondorescue.org/>.
+
+=head1 USER MAILING LIST
+
+For community exchanges around MondoRescue please use the list L<http://sourceforge.net/mailarchive/forum.php?forum_name=mondo-devel>
+
+=head1 AUTHORS
+
+The MondoRescue team lead by Bruno Cornec L<mailto:bruno@mondorescue.org>.
+
+=head1 COPYRIGHT
+
+MondoRescue is distributed under the GPL v2.0 license or later,
+described in the file C<COPYING> included with the distribution.
+
+=cut
+
+