PostgreSQL的 initdb 源代码分析之二十五-白红宇

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 voidmake_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/DemoDiror    /home/pgsql/project/bin/pg_ctl -D /home/pgsql/DemoDir -l logfile start