Function BootstrapModeMain

src/backend/bootstrap/bootstrap.c:533–578

* The main entry point for running the backend in bootstrap mode * * The bootstrap mode is used to initialize the template database. * The bootstrap backend doesn't speak SQL, but instead expects * commands in a special bootstrap language. */

 *	 commands in a special bootstrap language.
 */
static void
BootstrapModeMain(void)
{
	int			i;

	Assert(!IsUnderPostmaster);
	Assert(IsBootstrapProcessingMode());

	/*
	 * To ensure that src/common/link-canary.c is linked into the backend, we
	 * must call it from somewhere.  Here is as good as anywhere.
	 */
	if (pg_link_canary_is_frontend())
		elog(ERROR, "backend is incorrectly linked to frontend functions");

	/*
	 * Do backend-like initialization for bootstrap mode
	 */
	InitProcess();

	InitPostgres(NULL, InvalidOid, NULL, InvalidOid, NULL, false);

	/* Initialize stuff for bootstrap-file processing */
	for (i = 0; i < MAXATTR; i++)
	{
		attrtypes[i] = NULL;
		Nulls[i] = false;
	}

	/*
	 * Process bootstrap input.
	 */
	StartTransactionCommand();
	boot_yyparse();
	CommitTransactionCommand();

	/*
	 * We should now know about all mapped relations, so it's okay to write
	 * out the initial relation mapping files.
	 */
	RelationMapFinishBootstrap();

	/* Clean up and exit */
	cleanup();
	proc_exit(0);
}


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