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modify list_process

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gatieme
2016-05-09 06:58:56 +08:00
parent 472636a15a
commit 6c34b0b359
3 changed files with 151 additions and 31 deletions
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study/process/find/find_task.c
+26 -24
View File
@@ -14,24 +14,7 @@
#include <linux/sched.h>
/*
* find_task_by_pid maybe not supported
* O(n) is fine :)
*/
struct task_struct * findTaskByPid(pid_t pid)
{
struct task_struct *task = NULL;
return NULL;
}
/*
* show the task info
*/
void getTaskinfo(struct task_struct *task)
{
}
//#define METHOD 2
static unsigned int METHOD = 1;
@@ -39,7 +22,21 @@ module_param(METHOD, uint,0400);
static unsigned int PID = 1;
module_param(PID, uint,0400);
static int find_task_init(void)
void getTaskinfo(struct task_struct *task)
{
}
/*
*
*
*/
void findTaskByPid(int pid)
{
struct task_struct *task = NULL, *pTask = NULL;
struct list_head *pos = NULL;
@@ -57,7 +54,7 @@ static int find_task_init(void)
list_for_each(pos, &task->tasks)
{
pTask = list_entry(pos, struct task_struct, tasks );
if(pTask->pid == (pid_t)PID)
if(pTask->pid == (pid_t)pid)
{
printk(KERN_ALERT "%d\t%s\t%p\n", pTask->pid, pTask->comm, pTask);
break;
@@ -69,7 +66,7 @@ static int find_task_init(void)
method = "for_each_process";
for_each_process(task)
{
if(task->pid == PID)
if(task->pid == pid)
{
printk(KERN_ALERT "%d\t%s\t%p\n", task->pid, task->comm, task);
break;
@@ -80,7 +77,7 @@ static int find_task_init(void)
method = "list_for_each_entry";
list_for_each_entry(pTask, &task->tasks, tasks)
{
if(pTask->pid == PID)
if(pTask->pid == (pid_t)pid)
{
printk(KERN_ALERT "%d\t%s\t%p\n", pTask->pid, pTask->comm, pTask);
}
@@ -90,15 +87,20 @@ static int find_task_init(void)
return 0;
}
static void find_task_exit(void)
static int init_find_task(void)
{
}
static void exit_find_task(void)
{
printk(KERN_ALERT "GOOD BYE:find_task!!\n");
}
module_init(find_task_init);
module_exit(find_task_exit);
module_init(init_find_taskt);
module_exit(exit_find_task);
MODULE_AUTHOR("gatieme");
MODULE_LICENSE("GPL");
study/process/find/find_task.c.1
+104
View File
@@ -0,0 +1,104 @@
/*************************************************************************
> 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>
/*
* find_task_by_pid maybe not supported
* O(n) is fine :)
*/
struct task_struct * findTaskByPid(pid_t pid)
{
struct task_struct *task = NULL;
return NULL;
}
/*
* show the task info
*/
void getTaskinfo(struct task_struct *task)
{
}
//#define METHOD 2
static unsigned int METHOD = 1;
module_param(METHOD, uint,0400);
static unsigned int PID = 1;
module_param(PID, uint,0400);
static int find_task_init(void)
{
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)
{
printk(KERN_ALERT "%d\t%s\t%p\n", pTask->pid, pTask->comm, pTask);
}
}
}
printk("the method is %s", method);
return 0;
}
static void find_task_exit(void)
{
printk(KERN_ALERT "GOOD BYE:find_task!!\n");
}
module_init(find_task_init);
module_exit(find_task_exit);
MODULE_AUTHOR("gatieme");
MODULE_LICENSE("GPL");
study/process/list/list_process.c
+21 -7
View File
@@ -12,15 +12,20 @@
#include <linux/moduleparam.h>
#include <linux/sched.h>
//#include <asm/current.h>
//#define METHOD 2
/*
* you can use METHOD to select the function you want to list the process
* METHOD = 1 "list_for_each"
* METHOD = 2 "for_each_process"
* METHOD = 3 "list_for_each_entry"
*/
static unsigned int METHOD = 1;
module_param(METHOD, uint,0400);
module_param(METHOD, uint, 0400);
static int list_process_init(void)
void do_list_process(void)
{
struct task_struct *task = NULL, *pTask = NULL;
struct list_head *pos = 0;
@@ -80,15 +85,24 @@ static int list_process_init(void)
return 0;
}
static void list_process_exit(void)
static int init_list_process(void)
{
// list all the process of you system
do_list_process( );
}
static void exit_list_process(void)
{
printk(KERN_ALERT "GOOD BYE--list process!!\n");
}
module_init(list_process_init);
module_exit(list_process_exit);
module_init(init_list_process);
module_exit(exit_list_process);
MODULE_AUTHOR("gatieme");
MODULE_LICENSE("GPL");