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040000 tree 1df290c993ec7e8fb506728e8cc28f28deffb47d	freebsd
040000 tree 9604fa3bba442ff2535038078cd37f0d04ef063f	linux
100644 blob fd72e1179bdef4607794e1fc0c70d107221180aa	operatingsystem.cc
100644 blob 8dd6c0573feabf3244929cc30566b9b843403e99	operatingsystem.hh
040000 tree c4f024737fb5c51fa8d5e5f668c5af89f42fbeb5	solaris
100644 blob d97b766bd88c83ffc25e3a05097fa660a91a14ca	system_events.cc
100644 blob 96eda7f5b7ce3b3b2928f8cc6fc6dcac2be30d2c	system_events.hh