1 files changed, 46 insertions, 0 deletions
diff --git a/src/pmns/lockpmns b/src/pmns/lockpmns
new file mode 100644
index 0000000..9e670cc
--- /dev/null
+++ b/src/pmns/lockpmns
@@ -0,0 +1,46 @@
+#!/bin/sh
+#
+# Copyright (c) 1995-2002 Silicon Graphics, Inc.  All Rights Reserved.
+# 
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+# 
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+#
+# Lock the PMNS against concurrent transactional updates
+#
+
+. $PCP_DIR/etc/pcp.env
+
+lock=${1-$PCP_VAR_DIR/pmns/root}.lock
+
+i=0
+while true
+do
+    if pmlock $lock
+    then
+	# lock acquired
+	#
+	#DEBUG# echo "pmnslock: `date; ls -li $lock`"
+	break
+    fi
+    if [ $i -eq 20 ]
+    then
+	echo "lockpmns: Warning: Unable to acquire lock ($lock)"
+	echo "                   after 120 seconds ... continuing anyway"
+	exit 1
+    fi
+    sleep 5
+    i=`expr $i + 1`
+done
+
+exit 0