继续分析：
if (pwprompt || pwfilename) get_set_pwd();
由于我启动initdb的时候，没有设置口令相关的选项，故此略过。
接下来：
setup_depend();
展开：
就是一组sql问，送给 postgres 执行：
cmd的值是：
"/home/pgsql/project/bin/postgres" --single -F -O -c search_path=pg_catalog -c exit_on_error=true template1 >/dev/null
/* * set up pg_depend */ static void setup_depend(void) { PG_CMD_DECL; const char **line; static const char *pg_depend_setup[] = { /* * Make PIN entries in pg_depend for all objects made so far in the * tables that the dependency code handles. This is overkill (the * system doesn't really depend on having every last weird datatype, * for instance) but generating only the minimum required set of * dependencies seems hard. * * Note that we deliberately do not pin the system views, which * haven't been created yet. Also, no conversions, databases, or * tablespaces are pinned. * * First delete any already-made entries; PINs override all else, and * must be the only entries for their objects. */ "DELETE FROM pg_depend; ", "VACUUM pg_depend; ", "DELETE FROM pg_shdepend; ", "VACUUM pg_shdepend; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_class; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_proc; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_type; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_cast; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_constraint; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_attrdef; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_language; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_operator; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_opclass; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_opfamily; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_amop; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_amproc; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_rewrite; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_trigger; ", /* * restriction here to avoid pinning the public namespace */ "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_namespace " " WHERE nspname LIKE 'pg%'; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_ts_parser; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_ts_dict; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_ts_template; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_ts_config; ", "INSERT INTO pg_depend SELECT 0,0,0, tableoid,oid,0, 'p' " " FROM pg_collation; ", "INSERT INTO pg_shdepend SELECT 0,0,0,0, tableoid,oid, 'p' " " FROM pg_authid; ", NULL }; fputs(_("initializing dependencies ... "), stdout); fflush(stdout); snprintf(cmd, sizeof(cmd), ""%s" %s template1 >%s", backend_exec, backend_options, DEVNULL); PG_CMD_OPEN; for (line = pg_depend_setup; *line != NULL; line++) PG_CMD_PUTS(*line); PG_CMD_CLOSE; check_ok(); }