PostgreSQL的 initdb 源代码分析之二十五

继续分析：

make_postgres();

展开：

目的是创建postgres数据库。

cmd是：/home/pgsql/project/bin/postgres" --single -F -O -c search_path=pg_catalog -c exit_on_error=true template1 >/dev/null

/*
* copy template1 to postgres
*/
static void
make_postgres(void)
{
PG_CMD_DECL;
const char **line;
static const char *postgres_setup[] = {
"CREATE DATABASE postgres;\n",
"COMMENT ON DATABASE postgres IS 'default administrative connection database';\n",
NULL
};

fputs(_("copying template1 to postgres ... "), stdout);
fflush(stdout);

snprintf(cmd, sizeof(cmd),
"\"%s\" %s template1 >%s",
backend_exec, backend_options,
DEVNULL);

PG_CMD_OPEN;

for (line = postgres_setup; *line; line++)
PG_CMD_PUTS(*line);

PG_CMD_CLOSE;

check_ok();
}

再接下来，就是结束了：

if (authwarning != NULL)
fprintf(stderr, "%s", authwarning);

/* Get directory specification used to start this executable */
strcpy(bin_dir, argv[0]);
get_parent_directory(bin_dir);

printf(_("\nSuccess. You can now start the database server using:\n\n"
"    %s%s%spostgres%s -D %s%s%s\n"
"or\n"
"    %s%s%spg_ctl%s -D %s%s%s -l logfile start\n\n"),
QUOTE_PATH, bin_dir, (strlen(bin_dir) > 0) ? DIR_SEP : "", QUOTE_PATH,
QUOTE_PATH, pg_data_native, QUOTE_PATH,
QUOTE_PATH, bin_dir, (strlen(bin_dir) > 0) ? DIR_SEP : "", QUOTE_PATH,
QUOTE_PATH, pg_data_native, QUOTE_PATH);

return 0;

会给出一些提示信息，类似于：

Success. You can now start the database server using:

/home/pgsql/project/bin/postgres -D /home/pgsql/DemoDir
or
/home/pgsql/project/bin/pg_ctl -D /home/pgsql/DemoDir -l logfile start