Ejemplo n.º 1
0
/*
 * Any Postgres server process begins execution here.
 */
int
main(int argc, char *argv[])
{
	progname = get_progname(argv[0]);

	/*
	 * Platform-specific startup hacks
	 */
	startup_hacks(progname);

	/*
	 * Remember the physical location of the initially given argv[] array for
	 * possible use by ps display.	On some platforms, the argv[] storage must
	 * be overwritten in order to set the process title for ps. In such cases
	 * save_ps_display_args makes and returns a new copy of the argv[] array.
	 *
	 * save_ps_display_args may also move the environment strings to make
	 * extra room. Therefore this should be done as early as possible during
	 * startup, to avoid entanglements with code that might save a getenv()
	 * result pointer.
	 */
	argv = save_ps_display_args(argc, argv);

	/*
	 * If supported on the current platform, set up a handler to be called if
	 * the backend/postmaster crashes with a fatal signal or exception.
	 */
#if defined(WIN32) && defined(HAVE_MINIDUMP_TYPE)
	pgwin32_install_crashdump_handler();
#endif

	/*
	 * Set up locale information from environment.	Note that LC_CTYPE and
	 * LC_COLLATE will be overridden later from pg_control if we are in an
	 * already-initialized database.  We set them here so that they will be
	 * available to fill pg_control during initdb.	LC_MESSAGES will get set
	 * later during GUC option processing, but we set it here to allow startup
	 * error messages to be localized.
	 */

	set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("postgres"));

#ifdef WIN32

	/*
	 * Windows uses codepages rather than the environment, so we work around
	 * that by querying the environment explicitly first for LC_COLLATE and
	 * LC_CTYPE. We have to do this because initdb passes those values in the
	 * environment. If there is nothing there we fall back on the codepage.
	 */
	{
		char	   *env_locale;

		if ((env_locale = getenv("LC_COLLATE")) != NULL)
			pg_perm_setlocale(LC_COLLATE, env_locale);
		else
			pg_perm_setlocale(LC_COLLATE, "");

		if ((env_locale = getenv("LC_CTYPE")) != NULL)
			pg_perm_setlocale(LC_CTYPE, env_locale);
		else
			pg_perm_setlocale(LC_CTYPE, "");
	}
#else
	pg_perm_setlocale(LC_COLLATE, "");
	pg_perm_setlocale(LC_CTYPE, "");
#endif

#ifdef LC_MESSAGES
	pg_perm_setlocale(LC_MESSAGES, "");
#endif

	/*
	 * We keep these set to "C" always, except transiently in pg_locale.c; see
	 * that file for explanations.
	 */
	pg_perm_setlocale(LC_MONETARY, "C");
	pg_perm_setlocale(LC_NUMERIC, "C");
	pg_perm_setlocale(LC_TIME, "C");

	/*
	 * Now that we have absorbed as much as we wish to from the locale
	 * environment, remove any LC_ALL setting, so that the environment
	 * variables installed by pg_perm_setlocale have force.
	 */
	unsetenv("LC_ALL");

	/*
	 * Catch standard options before doing much else
	 */
	if (argc > 1)
	{
		if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
		{
			help(progname);
			exit(0);
		}
		if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
		{
			puts("postgres (PostgreSQL) " PG_VERSION);
			exit(0);
		}
	}

	/*
	 * Make sure we are not running as root.
	 */
	check_root(progname);

	/*
	 * Dispatch to one of various subprograms depending on first argument.
	 */

#ifdef EXEC_BACKEND
	if (argc > 1 && strncmp(argv[1], "--fork", 6) == 0)
		exit(SubPostmasterMain(argc, argv));
#endif

#ifdef WIN32

	/*
	 * Start our win32 signal implementation
	 *
	 * SubPostmasterMain() will do this for itself, but the remaining modes
	 * need it here
	 */
	pgwin32_signal_initialize();
#endif

	if (argc > 1 && strcmp(argv[1], "--boot") == 0)
		AuxiliaryProcessMain(argc, argv);		/* does not return */

	if (argc > 1 && strcmp(argv[1], "--describe-config") == 0)
		exit(GucInfoMain());

	if (argc > 1 && strcmp(argv[1], "--single") == 0)
		exit(PostgresMain(argc, argv, get_current_username(progname)));

	exit(PostmasterMain(argc, argv));
}
Ejemplo n.º 2
0
/*
 * Any Postgres server process begins execution here.
 */
int
main(int argc, char *argv[])
{
	bool		do_check_root = true;

	progname = get_progname(argv[0]);

	/*
	 * Platform-specific startup hacks
	 */
	startup_hacks(progname);

	/*
	 * Remember the physical location of the initially given argv[] array for
	 * possible use by ps display.  On some platforms, the argv[] storage must
	 * be overwritten in order to set the process title for ps. In such cases
	 * save_ps_display_args makes and returns a new copy of the argv[] array.
	 *
	 * save_ps_display_args may also move the environment strings to make
	 * extra room. Therefore this should be done as early as possible during
	 * startup, to avoid entanglements with code that might save a getenv()
	 * result pointer.
	 */
	argv = save_ps_display_args(argc, argv);

	/*
	 * If supported on the current platform, set up a handler to be called if
	 * the backend/postmaster crashes with a fatal signal or exception.
	 */
#if defined(WIN32) && defined(HAVE_MINIDUMP_TYPE)
	pgwin32_install_crashdump_handler();
#endif

	/*
	 * Fire up essential subsystems: error and memory management
	 *
	 * Code after this point is allowed to use elog/ereport, though
	 * localization of messages may not work right away, and messages won't go
	 * anywhere but stderr until GUC settings get loaded.
	 */
	MemoryContextInit();

	/*
	 * Set up locale information from environment.  Note that LC_CTYPE and
	 * LC_COLLATE will be overridden later from pg_control if we are in an
	 * already-initialized database.  We set them here so that they will be
	 * available to fill pg_control during initdb.  LC_MESSAGES will get set
	 * later during GUC option processing, but we set it here to allow startup
	 * error messages to be localized.
	 */

	set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("postgres"));

#ifdef WIN32

	/*
	 * Windows uses codepages rather than the environment, so we work around
	 * that by querying the environment explicitly first for LC_COLLATE and
	 * LC_CTYPE. We have to do this because initdb passes those values in the
	 * environment. If there is nothing there we fall back on the codepage.
	 */
	{
		char	   *env_locale;

		if ((env_locale = getenv("LC_COLLATE")) != NULL)
			init_locale("LC_COLLATE", LC_COLLATE, env_locale);
		else
			init_locale("LC_COLLATE", LC_COLLATE, "");

		if ((env_locale = getenv("LC_CTYPE")) != NULL)
			init_locale("LC_CTYPE", LC_CTYPE, env_locale);
		else
			init_locale("LC_CTYPE", LC_CTYPE, "");
	}
#else
	init_locale("LC_COLLATE", LC_COLLATE, "");
	init_locale("LC_CTYPE", LC_CTYPE, "");
#endif

#ifdef LC_MESSAGES
	init_locale("LC_MESSAGES", LC_MESSAGES, "");
#endif

	/*
	 * We keep these set to "C" always, except transiently in pg_locale.c; see
	 * that file for explanations.
	 */
	init_locale("LC_MONETARY", LC_MONETARY, "C");
	init_locale("LC_NUMERIC", LC_NUMERIC, "C");
	init_locale("LC_TIME", LC_TIME, "C");

	/*
	 * Now that we have absorbed as much as we wish to from the locale
	 * environment, remove any LC_ALL setting, so that the environment
	 * variables installed by pg_perm_setlocale have force.
	 */
	unsetenv("LC_ALL");

	check_strxfrm_bug();

	/*
	 * Catch standard options before doing much else, in particular before we
	 * insist on not being root.
	 */
	if (argc > 1)
	{
		if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
		{
			help(progname);
			exit(0);
		}
		if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
		{
			puts("postgres (PostgreSQL) " PG_VERSION);
			exit(0);
		}

		/*
		 * In addition to the above, we allow "--describe-config" and "-C var"
		 * to be called by root.  This is reasonably safe since these are
		 * read-only activities.  The -C case is important because pg_ctl may
		 * try to invoke it while still holding administrator privileges on
		 * Windows.  Note that while -C can normally be in any argv position,
		 * if you want to bypass the root check you must put it first.  This
		 * reduces the risk that we might misinterpret some other mode's -C
		 * switch as being the postmaster/postgres one.
		 */
		if (strcmp(argv[1], "--describe-config") == 0)
			do_check_root = false;
		else if (argc > 2 && strcmp(argv[1], "-C") == 0)
			do_check_root = false;
	}

	/*
	 * Make sure we are not running as root, unless it's safe for the selected
	 * option.
	 */
	if (do_check_root)
		check_root(progname);

	/*
	 * Dispatch to one of various subprograms depending on first argument.
	 */

#ifdef EXEC_BACKEND
	if (argc > 1 && strncmp(argv[1], "--fork", 6) == 0)
		SubPostmasterMain(argc, argv);	/* does not return */
#endif

#ifdef WIN32

	/*
	 * Start our win32 signal implementation
	 *
	 * SubPostmasterMain() will do this for itself, but the remaining modes
	 * need it here
	 */
	pgwin32_signal_initialize();
#endif

	if (argc > 1 && strcmp(argv[1], "--boot") == 0)
		AuxiliaryProcessMain(argc, argv);		/* does not return */
	else if (argc > 1 && strcmp(argv[1], "--describe-config") == 0)
		GucInfoMain();			/* does not return */
	else if (argc > 1 && strcmp(argv[1], "--single") == 0)
		PostgresMain(argc, argv,
					 NULL,		/* no dbname */
					 strdup(get_user_name_or_exit(progname)));	/* does not return */
	else
		PostmasterMain(argc, argv);		/* does not return */
	abort();					/* should not get here */
}