Bug 1252053

Cause: snmpd expected, that sensor names reported by lm_sensors library are unique. However, on systems with multiple sockets with Xeon family CPUs, the thermal sensors on all CPUs have the same name. Consequence: snmpd reported temperature only of one CPU. Fix: snmpd adds prefix to all sensors, that have the same name. Result: snmpd reports temperature of all CPUs. For example, on 2-socket machine with two-core CPUs, the old snmpd reported just two thermal sensors (from the first CPU) in LM-SENSORS-MIB::lmTempSensorsTable: lmTempSensorsDevice.2 = STRING: Core 0 lmTempSensorsDevice.3 = STRING: Core 1 With this update, all four thermal sensors are reported. Notice the prefix of second set of sensor names: lmTempSensorsDevice.2 = STRING: Core 0 lmTempSensorsDevice.3 = STRING: Core 1 lmTempSensorsDevice.6 = STRING: coretemp-isa-0004:Core 0 lmTempSensorsDevice.7 = STRING: coretemp-isa-0004:Core 1 The first set of sensors is kept without prefix to keep compatibility with old applications, which may expect sensor named 'Core 0'.