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chapter19/uptime_fieldtest.ksh

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+#!/bin/ksh
+#
+# SCRIPT: uptime_fieldtest.ksh
+# AUTHOR: Randy Michael
+# DATE: 07/28/2002
+# PLATFORM: Any UNIX
+# PURPOSE: This shell script is used to demonstrate how the 
+#          average load statistics field shift depending on
+#          how long it has been since the last system reboot.
+#          The options are "min", "day", "hr" and combinations.
+#          If all other tests fail then the system has been running
+#          for 1-23 hours.
+
+echo "\n" # Write one blank new line to the screen
+
+# Show a current uptime output
+
+uptime
+
+# Find the correct field bases on how long the system has been up.
+
+if $(uptime | grep day | grep min >/dev/null)
+then
+     FIELD=11
+elif $(uptime | grep day | grep hr >/dev/null)
+then
+     FIELD=11
+elif $(uptime | grep day >/dev/null)
+then
+     FIELD=10 
+elif $(uptime | grep min >/dev/null) 
+then
+     FIELD=9 
+else
+     FIELD=8
+fi
+
+# Display the correct field.
+
+echo "\nField is $FIELD \n"
+