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Commit70516a1

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Handle EACCES errors from kevent() better.
While registering for postmaster exit events, we have to handle a coupleof edge cases where the postmaster is already gone. Commit815c2f0missed one: EACCES must surely imply that PostmasterPid no longerbelongs to our postmaster process (or alternatively an unexpectedpermissions model has been imposed on us). Like ESRCH, this should betreated as a WL_POSTMASTER_DEATH event, rather than being raised withereport().No known problems reported in the wild. Per code review from Tom Lane.Back-patch to 13.Reported-by: Tom Lane <tgl@sss.pgh.pa.us>Discussion:https://postgr.es/m/3624029.1602701929%40sss.pgh.pa.us
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‎src/backend/storage/ipc/latch.c‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1148,7 +1148,8 @@ WaitEventAdjustKqueue(WaitEventSet *set, WaitEvent *event, int old_events)
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if (rc<0)
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{
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if (event->events==WL_POSTMASTER_DEATH&&errno==ESRCH)
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if (event->events==WL_POSTMASTER_DEATH&&
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(errno==ESRCH||errno==EACCES))
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set->report_postmaster_not_running= true;
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else
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ereport(ERROR,

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