jammy (2) query_module.2.gz

NAME

       query_module - 向内核查询和模块有关的各个位.   /* 查询有关的位?? */

总览

       #include <linux/module.h>

       int query_module(const char *name, int which,void *buf, size_t bufsize, size _t *ret);

描述

       query_module请求和可加载模块有关的来自内核的信息.信息的细致的特性和格式依赖于        which参数,一些函数要
       求name参数来命名当前被加载的模块.一些允许参数name为null, 指明内核是正确的.: which的值 0   Always  returns
       success.  Used to probe for the system call.  0   总是返回成功,用来探测系统调用.   /* 参见 insmod -p 和前
       面文章 */ QM_MODULES        Returns the names of all loaded modules. The output buffer
        format is adjacent null-terminated strings; ret is set to the number of mod ules.
           返回所有已加载的模块的名字.输出缓冲区的格式是邻近的以null终止的字符串;ret    被     设置为模块的数目.
       QM_DEPS         Returns  the names of all modules used by the indicated module.  The output buffer format
       is adjacent null-terminated strings; ret is set t o the number of modules.     返回所有被name参数指定的模
       块使用的模块的名字.输出     缓     冲区格式是邻近的以null终止的字符串;ret被设置为模块的数目.      QM_REFS
       Returns the names of all modules using the indicated module.  This is the inverse of QM_DEPS. The  output
       buffer format is adjacent null-te rminated strings; ret is set to the number of modules.
           返回所有正使用被name参数指定的模块的模块名字.这和QM_DEPS是相反的.输出缓冲 区 格式是以邻近的null终止的
       字符串;ret被设置为模块的数目.  QM_SYMBOLS        Returns the symbols and values exported by the kernel or
       t he indicated module. The buffer format is an array of:
                      struct module_symbol
                     {
                       unsigned long value;
                       unsigned long name;
                     };
                     followed  by  null-terminated  strings.  The  value  of name is the character offset of the
       string relative to the start of buf; ret is set to t he number of symbols.
           返回被内核或指定模块导出(开放)的符号和值对.缓冲区格式是一个以null终止的 结构数组,name的值是相对缓冲区
       的开始的字符串的字符偏移;ret被设置为符号的数目.

           struct module_symbol
           {
             unsigned long value;
             unsigned long value;
           }  QM_INFO         Returns  miscelaneous  information  about the indicated module.  The output buffer
       format is:
                     struct module_info
                     {
                       unsigned long address;
                       unsigned long size;
                       unsigned long flags;
                     };
                     where address is the kernel address at which the module reside s, size is the size  of  the
       module  in  bytes,  and  flags is a mask of MOD_RUNNI NG, MOD_AUTOCLEAN, et al that indicates the current
       status of the module. re t is set to the size of the            module_info struct.
           返回各种和指定模块相关的各种信息,输出缓冲区的格式如下:
           struct module_info
           {
           unsigned long address;
           unsigned long size;
           unsigned long flags;
           }
        address是模块在内核空间中驻留的地址,size是模块以字节计数的大小,flags是MOD_R  UNING,MOD_AUTOCLEAN等指示模
       块当前状态的标志的按位或组成的掩玛.ret被设置为mod ule_info结构的大小.

返回值

       成功时总是返回0,错误是返回-1,全局变量errno被相应设置.

错误

       ENOENT
                  被name指定的模块不存在.

       EINVAL

       ENOSPC
                  提供的缓冲区太小,ret被设置为需要的最小大小.

       EFAULT
                  name,buf或ret中至少一个越出了程序可访问的地址空间.

             "雷勇" <nsinit@263.net>

跋

       本页面中文版由中文 man 手册页计划提供。
       中文 man 手册页计划：https://github.com/man-pages-zh/manpages-zh

                                                                                                 query_module(2)