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Commit5e1e47c

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Ignore SIGSYS during initdb.
This prevents the recently-added probe for shm_open() from crashingon platforms that are impolite enough to deliver a signal rather thanreturning ENOSYS for an unimplemented kernel call. At least on theone known example (HPUX 10.20), ignoring SIGSYS does result in thedesired behavior of getting an ENOSYS error return instead.Per discussion, we might later wish to do this in the backend as well,but for now it seems sufficient to do it in initdb.
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‎src/bin/initdb/initdb.c

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@@ -3197,6 +3197,11 @@ setup_signals(void)
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#ifdefSIGPIPE
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pqsignal(SIGPIPE,SIG_IGN);
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#endif
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/* Prevent SIGSYS so we can probe for kernel calls that might not work */
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#ifdefSIGSYS
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pqsignal(SIGSYS,SIG_IGN);
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#endif
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}
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