Linux内核编程：Linux2.6内核源码解析_进程遍历        

/*
*File    : test.c
*Author  : DavidLin
*Date    : 2014-12-07pm
*Email   : linpeng1577@163.com or linpeng1577@gmail.com
*world   : the city of SZ, in China
*Ver     : 000.000.001
*history :     editor      time            do
*          1)LinPeng       2014-12-07      created this file!
*          2)
*/

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/sched.h>

static int list_init(void)
{
struct task_struct *task;

task = NULL;

for_each_process(task) {
printk("pid = %d\n", task->pid);
}

return 0;
}

static void list_exit(void)
{
printk("KERNEL MACRO: for_each_process exit\n");
}

module_init(list_init);
module_exit(list_exit);

MODULE_AUTHOR("Linpeng1577");
MODULE_DESCRIPTION("KERNEL 2.6 MACRO STUDY");
MODULE_LICENES(GPL);