support postscripts return status on ubuntu

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@15031 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/share/xcat/install/scripts/post.ubuntu

@@ -109,6 +109,8 @@ export PATH=/xcatpost:$PATH
 # use the run_ps subroutine to run the postscripts
 TMP=`sed "/postscripts-start-here/,/postscripts-end-here/ s/\(.*\)/run_ps \1/;s/run_ps\s*#/#/;s/run_ps\s*$//" /xcatpost/mypostscript`
 echo "
+# global value to store the running status of the postbootscripts,the value is non-zero if one postbootscript failed
+return_value=0
 # subroutine used to run postscripts
 run_ps () {
  logdir=\"/var/log/xcat\"
@@ -120,8 +122,13 @@ run_ps () {
   #./\$@ 2>&1 1> /tmp/tmp4xcatlog
   #cat /tmp/tmp4xcatlog | tee -a \$logfile
   ./\$@ 2>&1 | tee -a $logfile
+  ret_local=\${PIPESTATUS[0]}
+  if [ \"\$ret_local\" -ne \"0\" ]; then
+     return_value=\$ret_local
+  fi
  else
    echo "\"\`date\` Postscript \$1 does NOT exist.\"" | tee -a \$logfile
+   return_value=-1
  fi
 }
 # subroutine end