| query_module(2) | System Calls Manual | query_module(2) |
query_module - 向核心查詢和模組有關的各個位. /* 查詢有關的位?? */
#include <linux/module.h>
int query_module(const char *name, int which,void *buf, size_t bufsize, size _t *ret);
query_module請求和可載入模組有關的來自核心的資訊.資訊的細緻的特性和格式依賴於
which引數,一些函式要求name引數來命名當前被載入的模組.一些允許引數name為null,
指明核心是正確的.:
which的值 0 Always returns success. Used to probe for the system
call. 0
總是返回成功,用來探測系統呼叫.
/* 參見 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.
返回所有已載入的模組的名字.輸出緩衝區的格式是鄰近的以null終止的字串;ret
被 設定為模組的數目.
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引數指定的模組使用的模組的名字.輸出
緩
衝區格式是鄰近的以null終止的字串;ret被設定為模組的數目.
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引數指定的模組的模組名字.這和QM_DEPS是相反的.輸出緩衝
區
格式是以鄰近的null終止的字串;ret被設定為模組的數目.
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.
返回被核心或指定模組匯出(開放)的符號和值對.緩衝區格式是一個以null終止的
結構陣列,name的值是相對緩衝區的開始的字串的字元偏移;ret被設定為符號的數目.
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.
返回各種和指定模組相關的各種資訊,輸出緩衝區的格式如下:
struct module_info
{
unsigned long address;
unsigned long size;
unsigned long flags;
}
address是模組在核心空間中駐留的地址,size是模組以位元組計數的大小,flags是MOD_R
UNING,MOD_AUTOCLEAN等指示模組當前狀態的標誌的按位或組成的掩瑪.ret被設定為mod
ule_info結構的大小.
成功時總是返回0,錯誤是返回-1,全域性變數errno被相應設定.
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