-Fix problem where copycds would not umount correctly

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@1872 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/copycds.pm

@@ -5,6 +5,7 @@ use xCAT::Table;
 use Data::Dumper;
 use Getopt::Long;
 use File::Basename;
+use Cwd;
 Getopt::Long::Configure("bundling");
 Getopt::Long::Configure("pass_through");
 
@@ -34,6 +35,7 @@ sub process_request {
   my $arch = undef;
   $identified=0;
   $::CDMOUNTPATH="/mnt/xcat";
+  my $existdir = getcwd;
 
   @ARGV = @{$request->{arg}};
   GetOptions(
@@ -94,6 +96,8 @@ sub process_request {
     $doreq->($newreq,\&take_answer);
     $::CDMOUNTPATH="";
 
+    chdir($existdir);
+    while (wait() > 0) { yield; } #Make sure all children exit before trying umount
     system("umount /mnt/xcat");
     unless ($identified) {
        $callback->({error=>["copycds could not identify the ISO supplied, you may wish to try -n <osver>"],errorcode=>[1]});