PostgreSQL的 initdb 源代码分析之十四-白红宇

继续分析：

/*     * Make the per-database PG_VERSION for template1 only after init'ing it     */    write_version_file("base/1");

就是在base/1目录下，生成一个 PG_VERSION 文件。

[pgsql@localhost 1]$ pwd/home/pgsql/DemoDir/base/1[pgsql@localhost 1]$ cat PG_VERSION9.1[pgsql@localhost 1]$

接下来：

/* Create the stuff we don't need to use bootstrap mode for */    setup_auth();

展开后看：

/* * set up the shadow password table */static voidsetup_auth(void){    PG_CMD_DECL;    const char **line;    static const char *pg_authid_setup[] = {        /*         * The authid table shouldn't be readable except through views, to         * ensure passwords are not publicly visible.         */        "REVOKE ALL on pg_authid FROM public;\n",        NULL    };    fputs(_("initializing pg_authid ... "), stdout);    fflush(stdout);    snprintf(cmd, sizeof(cmd),             "\"%s\" %s template1 >%s",             backend_exec, backend_options,             DEVNULL);        PG_CMD_OPEN;    for (line = pg_authid_setup; *line != NULL; line++)        PG_CMD_PUTS(*line);    PG_CMD_CLOSE;    check_ok();}

此时，得到的cmd 是：

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

然后再把 pg_authid_setup[] 里的内容送到 postgres里去执行。此处是 ”REVOKE ALL on pg_authid FROM public;”

本文转自健哥的数据花园博客园博客，原文链接：http://www.cnblogs.com/gaojian/p/3178272.html，如需转载请自行联系原作者