#include<linux/init.h>
#include<linux/module.h>
#include<linux/kernel.h>
#include<linux/sched/signal.h>
#include<linux/moduleparam.h>
MODULE_LICENSE("GPL");
static int pid_n=-1;
module_param(pid_n,int,0644);
static int M2_init(void){
printk(KERN_ALERT "M2 running!>>>>>>>>>>>>>>>>>>>\n");
// check pid_n
if(pid_n!=-1)printk("pid_n receive successfully:%d!",pid_n);
else {
printk("error:pid_n receive nothing!\n");
return -EFAULT;
}
struct task_struct *p_task,*p_task_f,*p_sib,*p_chi;
struct pid *p_pid;
p_pid=find_get_pid(pid_n);
p_task=pid_task(p_pid,PIDTYPE_PID);
if(p_task==NULL){
printk("error:p_task should be noPointer!\n");
return -EFAULT;
}
// print father
printk("print father start!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
p_task_f=p_task->parent;
if(p_task==NULL)printk("p_task_f=NULL!\n");
else{
printk("********************************************\n");
printk("* father *\n");
printk("********************************************\n");
printk("*name---------%s\n",p_task_f->comm);
printk("*PID----------%d\n",p_task_f->pid);
printk("*state--------%ld\n",p_task_f->state);
printk("\n");
}
// print sibling
printk("print sibling start!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
int count=0;
if(&p_task->sibling==NULL)printk("no subling!\n");
else{
list_for_each_entry(p_sib,&p_task->sibling,sibling){
printk("********************************************\n");
printk("* sibling%02d *\n",count++);
printk("********************************************\n");
printk("*name---------%s\n",p_sib->comm);
printk("*PID----------%d\n",p_sib->pid);
printk("*state--------%ld\n",p_sib->state);
printk("\n");
}
}
// print children
printk("print children start!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
count=0;
if(&p_task->children==NULL)printk("no children!\n");
else{
list_for_each_entry(p_chi,&p_task->children,children){
printk("********************************************\n");
printk("* children%02d *\n",count++);
printk("********************************************\n");
printk("*name---------%s\n",p_chi->comm);
printk("*PID----------%d\n",p_chi->pid);
printk("*state--------%ld\n",p_chi->state);
printk("\n");
}
}
return 0;
}
static void M2_exit(void){
printk(KERN_ALERT "M2 exit!>>>>>>>>>>>>>>>>>>>>>\n");
}
module_init(M2_init);
module_exit(M2_exit);
