mirror of
https://github.com/gatieme/LDD-LinuxDeviceDrivers.git
synced 2026-08-20 22:04:56 +08:00
107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
/*************************************************************************
|
|
> File Name: process.c
|
|
> Author: GatieMe
|
|
> Mail: gatieme@163.com
|
|
> Created Time: 2016年04月01日 星期五 21时09分29秒
|
|
************************************************************************/
|
|
|
|
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
|
|
|
|
|
|
//#define METHOD 2
|
|
static unsigned int METHOD = 1;
|
|
module_param(METHOD, uint,0400);
|
|
|
|
static unsigned int PID = 1;
|
|
module_param(PID, uint,0400);
|
|
|
|
|
|
|
|
|
|
|
|
void getTaskinfo(struct task_struct *task)
|
|
{
|
|
}
|
|
|
|
/*
|
|
*
|
|
*
|
|
*/
|
|
|
|
void findTaskByPid(int pid)
|
|
{
|
|
struct task_struct *task = NULL, *pTask = NULL;
|
|
struct list_head *pos = NULL;
|
|
char *method = NULL;
|
|
|
|
task = &init_task;
|
|
|
|
printk(KERN_ALERT"PID\tCOMM\tADDR\n");
|
|
|
|
|
|
switch(METHOD)
|
|
{
|
|
case 1 :
|
|
method = "list_for_each";
|
|
list_for_each(pos, &task->tasks)
|
|
{
|
|
pTask = list_entry(pos, struct task_struct, tasks );
|
|
if(pTask->pid == (pid_t)pid)
|
|
{
|
|
printk(KERN_ALERT "%d\t%s\t%p\n", pTask->pid, pTask->comm, pTask);
|
|
break;
|
|
}
|
|
}
|
|
|
|
break;
|
|
case 2 :
|
|
method = "for_each_process";
|
|
for_each_process(task)
|
|
{
|
|
if(task->pid == pid)
|
|
{
|
|
printk(KERN_ALERT "%d\t%s\t%p\n", task->pid, task->comm, task);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case 3 :
|
|
method = "list_for_each_entry";
|
|
list_for_each_entry(pTask, &task->tasks, tasks)
|
|
{
|
|
if(pTask->pid == (pid_t)pid)
|
|
{
|
|
printk(KERN_ALERT "%d\t%s\t%p\n", pTask->pid, pTask->comm, pTask);
|
|
}
|
|
}
|
|
}
|
|
printk("the method is %s", method);
|
|
return 0;
|
|
}
|
|
|
|
static int init_find_task(void)
|
|
{
|
|
|
|
}
|
|
|
|
static void exit_find_task(void)
|
|
{
|
|
printk(KERN_ALERT "GOOD BYE:find_task!!\n");
|
|
}
|
|
|
|
|
|
|
|
module_init(init_find_taskt);
|
|
module_exit(exit_find_task);
|
|
|
|
MODULE_AUTHOR("gatieme");
|
|
MODULE_LICENSE("GPL");
|