util: throw if file has !digit characters

prometheus / procfs

procfs provides functions to retrieve system, kernel and process metrics from the pseudo-filesystem proc.

Apache License 2.0

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Closed rexagod closed 2 months ago

rexagod commented 3 months ago

Throw if file has non-numeric data, in addition to hinting the path that caused the error.

Fixes: prometheus#304, prometheus/node_exporter#1710

discordianfish commented 3 months ago

See ci errors