sawmill_logger: don't try to access sysfs entries when not existent #3
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Without this we have the following in the system log:
2012-11-19T08:10:34.479387Z [45097] tuna user.err sleepd: sysfs:SysfsGetDouble: Failed to
open file '/sys/devices/w1 bus master/w1_master_slaves/getrawcoulomb': No such file or
directory
2012-11-19T08:10:34.479875Z [45097] tuna user.err sleepd: sysfs:SysfsGetDouble: Failed to
open file '/sys/devices/w1 bus master/w1_master_slaves/getcoulomb': No such file or
directory
If the mentioned sysfs node is not available we return -1 to indicate there is nothing we can report.
regards,
Simon