startup.h File Reference

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Functions
void	HandleStartupProcInterrupts (void)
void	StartupProcessMain (void) __attribute__((noreturn))
void	PreRestoreCommand (void)
void	PostRestoreCommand (void)
bool	IsPromoteTriggered (void)
void	ResetPromoteTriggered (void)

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Function Documentation

void HandleStartupProcInterrupts

(

void

)

Definition at line 147 of file startup.c.

References got_SIGHUP, IsUnderPostmaster, PGC_SIGHUP, PostmasterIsAlive(), proc_exit(), ProcessConfigFile(), and shutdown_requested.

Referenced by recoveryPausesHere(), ShutdownWalRcv(), StartupXLOG(), and WaitForWALToBecomeAvailable().

{
    /*
     * Check if we were requested to re-read config file.
     */
    if (got_SIGHUP)
    {
        got_SIGHUP = false;
        ProcessConfigFile(PGC_SIGHUP);
    }

    /*
     * Check if we were requested to exit without finishing recovery.
     */
    if (shutdown_requested)
        proc_exit(1);

    /*
     * Emergency bailout if postmaster has died.  This is to avoid the
     * necessity for manual cleanup of all postmaster children.
     */
    if (IsUnderPostmaster && !PostmasterIsAlive())
        exit(1);
}

bool IsPromoteTriggered

(

void

)

Definition at line 254 of file startup.c.

References promote_triggered.

Referenced by CheckForStandbyTrigger().

{
    return promote_triggered;
}

void PostRestoreCommand

(

void

)

Definition at line 248 of file startup.c.

References in_restore_command.

Referenced by RestoreArchivedFile().

{
    in_restore_command = false;
}

void PreRestoreCommand

(

void

)

Definition at line 234 of file startup.c.

References in_restore_command, proc_exit(), and shutdown_requested.

Referenced by RestoreArchivedFile().

{
    /*
     * Set in_restore_command to tell the signal handler that we should exit
     * right away on SIGTERM. We know that we're at a safe point to do that.
     * Check if we had already received the signal, so that we don't miss a
     * shutdown request received just before this.
     */
    in_restore_command = true;
    if (shutdown_requested)
        proc_exit(1);
}

void ResetPromoteTriggered

(

void

)

Definition at line 260 of file startup.c.

References promote_triggered.

Referenced by CheckForStandbyTrigger().

{
    promote_triggered = false;
}

void StartupProcessMain

(

void

)

Definition at line 178 of file startup.c.

References elog, FATAL, InitializeTimeouts(), PG_SETMASK, pqsignal(), proc_exit(), RegisterTimeout(), SIG_DFL, SIG_IGN, SIGCHLD, SIGCONT, SIGHUP, SIGPIPE, SIGQUIT, SIGTTIN, SIGTTOU, SIGUSR1, SIGUSR2, SIGWINCH, STANDBY_DEADLOCK_TIMEOUT, STANDBY_TIMEOUT, StandbyDeadLockHandler(), StandbyTimeoutHandler(), startupproc_quickdie(), StartupProcShutdownHandler(), StartupProcSigHupHandler(), StartupProcSigUsr1Handler(), StartupProcTriggerHandler(), StartupXLOG(), and UnBlockSig.

Referenced by AuxiliaryProcessMain().

{
    /*
     * If possible, make this process a group leader, so that the postmaster
     * can signal any child processes too.
     */
#ifdef HAVE_SETSID
    if (setsid() < 0)
        elog(FATAL, "setsid() failed: %m");
#endif

    /*
     * Properly accept or ignore signals the postmaster might send us.
     */
    pqsignal(SIGHUP, StartupProcSigHupHandler); /* reload config file */
    pqsignal(SIGINT, SIG_IGN);  /* ignore query cancel */
    pqsignal(SIGTERM, StartupProcShutdownHandler);      /* request shutdown */
    pqsignal(SIGQUIT, startupproc_quickdie);    /* hard crash time */
    InitializeTimeouts();       /* establishes SIGALRM handler */
    pqsignal(SIGPIPE, SIG_IGN);
    pqsignal(SIGUSR1, StartupProcSigUsr1Handler);
    pqsignal(SIGUSR2, StartupProcTriggerHandler);

    /*
     * Reset some signals that are accepted by postmaster but not here
     */
    pqsignal(SIGCHLD, SIG_DFL);
    pqsignal(SIGTTIN, SIG_DFL);
    pqsignal(SIGTTOU, SIG_DFL);
    pqsignal(SIGCONT, SIG_DFL);
    pqsignal(SIGWINCH, SIG_DFL);

    /*
     * Register timeouts needed for standby mode
     */
    RegisterTimeout(STANDBY_DEADLOCK_TIMEOUT, StandbyDeadLockHandler);
    RegisterTimeout(STANDBY_TIMEOUT, StandbyTimeoutHandler);

    /*
     * Unblock signals (they were blocked when the postmaster forked us)
     */
    PG_SETMASK(&UnBlockSig);

    /*
     * Do what we came for.
     */
    StartupXLOG();

    /*
     * Exit normally. Exit code 0 tells postmaster that we completed recovery
     * successfully.
     */
    proc_exit(0);
}