Add 'mtr_rmtree'

mysql-test/lib/mtr_misc.pl:
  Add function 'mtr_rmtree' it will try 'rmtree' and if that fails (most likely
  due to permission problems we will fun File::find to chmod all files and dirs
  to 0777 and then delete.
mysql-test/mysql-test-run.pl:
  Use 'mtr_rmtree' in favour of 'rmtree'

mysql-test/lib/mtr_misc.pl

@@ -5,6 +5,7 @@
 # same name.
 
 use strict;
+use File::Find;
 
 sub mtr_full_hostname ();
 sub mtr_short_hostname ();
@@ -17,6 +18,7 @@ sub mtr_file_exists(@);
 sub mtr_exe_exists(@);
 sub mtr_exe_maybe_exists(@);
 sub mtr_copy_dir($$);
+sub mtr_rmtree($$);
 sub mtr_same_opts($$);
 sub mtr_cmp_opts($$);
 
@@ -202,6 +204,64 @@ sub mtr_copy_dir($$) {
 }
 
 
+sub mtr_rmtree($) {
+  my ($dir)= @_;
+  my $need_file_find= 0;
+  mtr_verbose("mtr_rmtree: $dir");
+
+  {
+    # Try to use File::Path::rmtree. Recent versions
+    # handles removal of directories and files that don't
+    # have full permissions, while older versions
+    # may have a problem with that and we use our own version
+
+    local $SIG{__WARN__}= sub {
+      $need_file_find= 1;
+      mtr_warning($_[0]);
+    };
+    rmtree($dir);
+  }
+  if ( $need_file_find ) {
+    mtr_warning("rmtree($dir) failed, trying with File::Find...");
+
+    my $errors= 0;
+
+    # chmod
+    find( {
+	   no_chdir => 1,
+	   wanted => sub {
+	     chmod(0777, $_)
+	       or mtr_warning("couldn't chmod(0777, $_): $!") and $errors++;
+	   }
+	  },
+	  $dir
+	);
+
+    # rm
+    finddepth( {
+	   no_chdir => 1,
+	   wanted => sub {
+	     my $file= $_;
+	     # Use special underscore (_) filehandle, caches stat info
+	     if (!-l $file and -d _ ) {
+	       rmdir($file) or
+		 mtr_warning("couldn't rmdir($file): $!") and $errors++;
+	     } else {
+	       unlink($file)
+		 or mtr_warning("couldn't unlink($file): $!") and $errors++;
+	     }
+	   }
+	  },
+	  $dir
+	);
+
+    mtr_error("Failed to remove '$dir'") if $errors;
+
+    mtr_report("OK, that worked!");
+  }
+}
+
+
 sub mtr_same_opts ($$) {
   my $l1= shift;
   my $l2= shift;

mysql-test/mysql-test-run.pl

@@ -1988,7 +1988,7 @@ sub remove_stale_vardir () {
       {
 	# Remove the directory which the link points at
 	mtr_verbose("Removing " . readlink($opt_vardir));
-	rmtree(readlink($opt_vardir));
+	mtr_rmtree(readlink($opt_vardir));
 
 	# Remove the "var" symlink
 	mtr_verbose("unlink($opt_vardir)");
@@ -2016,7 +2016,7 @@ sub remove_stale_vardir () {
 	foreach my $bin ( glob("$opt_vardir/*") )
 	{
 	  mtr_verbose("Removing bin $bin");
-	  rmtree($bin);
+	  mtr_rmtree($bin);
 	}
       }
     }
@@ -2024,7 +2024,7 @@ sub remove_stale_vardir () {
     {
       # Remove the entire "var" dir
       mtr_verbose("Removing $opt_vardir/");
-      rmtree("$opt_vardir/");
+      mtr_rmtree("$opt_vardir/");
     }
 
     if ( $opt_mem )
@@ -2033,7 +2033,7 @@ sub remove_stale_vardir () {
       # remove the $opt_mem dir to assure the symlink
       # won't point at an old directory
       mtr_verbose("Removing $opt_mem");
-      rmtree($opt_mem);
+      mtr_rmtree($opt_mem);
     }
 
   }
@@ -2046,11 +2046,11 @@ sub remove_stale_vardir () {
     # Remove the var/ dir in mysql-test dir if any
     # this could be an old symlink that shouldn't be there
     mtr_verbose("Removing $default_vardir");
-    rmtree($default_vardir);
+    mtr_rmtree($default_vardir);
 
     # Remove the "var" dir
     mtr_verbose("Removing $opt_vardir/");
-    rmtree("$opt_vardir/");
+    mtr_rmtree("$opt_vardir/");
   }
 }
 
@@ -2963,7 +2963,7 @@ sub restore_slave_databases ($) {
     {
       my $data_dir= $slave->[$idx]->{'path_myddir'};
       my $name= basename($data_dir);
-      rmtree($data_dir);
+      mtr_rmtree($data_dir);
       mtr_copy_dir("$path_snapshot/$name", $data_dir);
     }
   }
@@ -3310,7 +3310,7 @@ sub run_testcase ($) {
 sub save_installed_db () {
 
   mtr_report("Saving snapshot of installed databases");
-  rmtree($path_snapshot);
+  mtr_rmtree($path_snapshot);
 
   foreach my $data_dir (@data_dir_lst)
   {
@@ -3357,7 +3357,7 @@ sub restore_installed_db ($) {
     {
       my $name= basename($data_dir);
       save_files_before_restore($test_name, $data_dir);
-      rmtree("$data_dir");
+      mtr_rmtree("$data_dir");
       mtr_copy_dir("$path_snapshot/$name", "$data_dir");
     }
 
@@ -3367,7 +3367,7 @@ sub restore_installed_db ($) {
     {
       foreach my $ndbd (@{$cluster->{'ndbds'}})
       {
-	rmtree("$ndbd->{'path_fs'}" );
+	mtr_rmtree("$ndbd->{'path_fs'}" );
       }
     }
   }