QB-BLACKBOX - Online Linux Manual PageSection : 8
Updated : 2017-07-27

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NAMEqb-blackbox − Display "flight data" from the "blackbox".

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SYNOPSISqb-blackbox [blackbox-file...]

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DESCRIPTIONqb-blackbox prints out the logs (including debug logs) that were recorded using libqb's blackbox mechanism.

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Portability notesDue to variations amongst platforms, some of which directly impact the libqb's blackbox format handling (e.g. page size), there's currently only the commitment that qb-blackbox shall decode the blackbox files recorded at the same platform (plus the same page size) while using libqb compiled with the same relevant compile-time options (e.g. USE_CACHE_LINE_ALIGNMENT) as linked to this decoder. Otherwise, your mileage may vary.

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EXAMPLESGet info to help developers diagnose a crash.  
$ qb-blackbox /var/lib/corosync/fdata
Dumping the contents of /var/lib/corosync/fdata
Mar 23 20:58:57 message_handler_orf_token():3677 install seq 0 aru 0 high seq received 0
Mar 23 20:58:57 message_handler_orf_token():3696 retrans flag count 4 token aru 0 install seq 0 aru 0 0
Mar 23 20:58:57 old_ring_state_reset():1487 Resetting old ring state
Mar 23 20:58:57 deliver_messages_from_recovery_to_regular():1693 recovery to regular 1-0
Mar 23 20:58:57 memb_state_operational_enter():1779 Delivering to app 1 to 0
Mar 23 20:58:57 sync_abort():594 ENTERING sync_abort()
Mar 23 20:58:57 sync_save_transitional():586 ENTERING sync_save_transitional()
Mar 23 20:58:57 member_object_joined():301 Member joined: r(0) ip(192.168.122.1)
Mar 23 20:58:57 sync_abort():594 ENTERING sync_abort()

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SEE ALSOqblog.h(3)

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AUTHORAngus Salkeld 0

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Johanes Gumabo

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