Emit missing sensor warning only if SENSORS_SYSFS_ROOT is defined #9
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The lm-sensors library is widely used in various software, which could be run in VMs where HWMON support may be absent (e.g. cloud kernels in Debian). To avoid a confusing "/sys: No sensors at /sys/class/hwmon" on the console or in the logs, only emit the message if the user specifies an alternative path through SENSORS_SYSFS_ROOT. This behavior mirrors what is done for the "Not a sysfs mount" message. Fixes: 89548da ("Add SENSORS_SYSFS_ROOT environment support")
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The lm-sensors library is widely used in various software, which could be run in VMs where HWMON support may be absent (e.g. cloud kernels in Debian). To avoid a confusing "/sys: No sensors at /sys/class/hwmon" on the console or in the logs, only emit the message if the user specifies an alternative path through SENSORS_SYSFS_ROOT. This behavior mirrors what is done for the "Not a sysfs mount" message.
Fixes: 89548da ("Add SENSORS_SYSFS_ROOT environment support")