drakenclimber / libcgroup / 14344543685

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src/daemon/cgrulesengd: Correctly check for ENOBUFS when doing recvfrom()

Currently, code checks if recvfrom() returns ENOBUFS, however, it can never
return errno type error code, but -1 on error

Fix that by checking errno in case of an error instead

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Acked-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>

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