[syslog-ng]Sensord (lm_sensors) and Syslog-ng using "program()"

[Ann Hopkins]

I was wondering if anyone sees any problem with what I am doing with the 
following script.  I want an "Alarm" which causes an "Alert" message to 
actually shutdown the machine under certain circumstances, since I run a 
family server and I don't have a backup.

1)  "sensord" (lm_sensors library) is running and I can do "sensors" 
command to get a result.

via686a-isa-6000
Adapter: ISA adapter
Algorithm: ISA algorithm
CPU core:  +1.73 V  (min =  +1.68 V, max =  +2.49 V)
+2.5V:     +2.59 V  (min =  +2.24 V, max =  +2.74 V)
I/O:       +3.40 V  (min =  +2.95 V, max =  +3.62 V)
+5V:       +4.87 V  (min =  +4.47 V, max =  +5.49 V)
+12V:     +11.74 V  (min = +10.79 V, max = +13.18 V)
CPU Fan:     0 RPM  (min = 3000 RPM, div = 2)
P/S Fan:     0 RPM  (min = 3000 RPM, div = 2)
SYS Temp:  +30.0°C  (high =   +45°C, hyst =   +40°C)
CPU Temp:  +38.5°C  (high =   +60°C, hyst =   +55°C)
SBr Temp:  +25.1°C  (high =   +65°C, hyst =   +60°C)


2)  "syslog-ng" is working and logging the data under 'local5".  The 
following is the pertinent "syslog-ng.conf" data.  All the data is 
logged and the "Alert" data triggers input to a shell program.

filter f_local5     { facility(local5); };
filter f_sensorA    { level(alert) and facility(local5); };

destination sensord { file("/var/log/local5.log"); };
log { source(src); filter(f_local5); destination(sensord); };

# Sensor Alarm Messages - Programs are loaded once (email)
destination sensor_alarm { program("/usr/local/sbin/sensor_alarm.sh"); };
log { source(src); filter(f_sensorA); destination(sensor_alarm); };

3)  Program "sensor_alarm.sh" will try to shutdown the machine if it 
reaches a too hot condition.  I don't have fan sensors so it will never 
trigger.  I am no programmer, please excuse my very primitive (and 
naive) coding.

Is there anything wrong with calling this program?

SENSOR_ALARM.SH
#!/bin/sh

# Make sensord do something useful with syslog-ng

# -k does nothing will use a -h halt later
# +2 in 2 minutes

while read line; do

         echo $line | /usr/bin/mail -s "SENSORD Alarm" root@localhost

         AlarmName=""

         AlarmName=`echo $line | /usr/bin/awk -F":" '{ print $1 }'`



         case "$AlarmName" in

                 "CPU core")
                 /sbin/shutdown -k +2 "CPU core ALARM - bad voltage"
                 ;;

                 "SYS Temp")
                 /sbin/shutdown -k +2 "SYS Temp ALARM - too hot"
                 ;;

                 "CPU Temp")
                 /sbin/shutdown -k +2 "CPU Temp ALARM - too hot"
                 ;;

                 "CPU Fan")
                 /sbin/shutdown -k +2 "CPU Fan ALARM - fan down"
                 ;;

                 "P/S Fan")
                 /sbin/shutdown -k +2 "P/S Fan ALARM - fan down"
                 ;;

                 *)
                 echo "WARNING SENSORD - Be Careful!" | /usr/bin/wall
                 ;;
         esac

done