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Review of category "system"

plugins/user/system_users

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+#!/bin/sh
+# Plugin to get the number of logged in users
+# Written by Henrik Andersén 2010 <code@henrikandersen.se>
+#
+# Copyright (c) 2010, Henrik Andersen
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in the
+#      documentation and/or other materials provided with the distribution.
+#    * Neither the name of the copyright holder nor the
+#      names of its contributors may be used to endorse or promote products
+#      derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL Henrik Andersen BE LIABLE FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+case $1 in
+   config)
+        cat <<'EOM'
+graph_args --base 1000 -l 0
+graph_scale no
+graph_category system
+graph_info The number of users currently logged into the system
+graph_title Logged in users
+graph_vlabel users
+user.info Number of users currently logged in
+user.label users
+user.min 0
+EOM
+        exit 0;;
+esac
+
+count=$(/usr/bin/who -q ) 
+printf "user.value %i\n" ${count#*=}
+
+exit 0