Mirrors_BOOKS/LDD-LinuxDeviceDrivers
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完善了遍历所有进程的代码...

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gatieme
2016-05-08 22:32:27 +08:00
parent 1cb07786b8
commit 3c785f939e
1 changed files with 17 additions and 19 deletions
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study/process/list/list_process.c
+17 -19
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@@ -21,17 +21,14 @@ module_param(METHOD, uint,0400);
static int list_process_init(void)
{
struct task_struct *task, *p;
struct list_head *pos;
int count;
char *method;
count = 0; /*下面这些初始化完全是为了消除编译时的警告信息*/
p = 0;
task = 0;
pos = 0;
method = 0;
task = &init_task;
struct task_struct *task = NULL, *pTask = NULL;
struct list_head *pos = 0;
int count = 0;
char *method = NULL;
count = 0;
task = &init_task;
printk(KERN_ALERT"PID\tCOMM\n");
@@ -39,11 +36,11 @@ static int list_process_init(void)
{
case 1 :
method = "list_for_each";
list_for_each( pos, &task->tasks )
list_for_each(pos, &task->tasks)
{
p = list_entry( pos, struct task_struct, tasks );
pTask = list_entry(pos, struct task_struct, tasks);
count++;
printk( KERN_ALERT "%d\t%s\n", p->pid, p->comm );
printk(KERN_ALERT "%d\t%s\n", pTask->pid, pTask->comm);
}
break;
case 2 :
@@ -51,28 +48,29 @@ static int list_process_init(void)
for_each_process(task)
{
count++;
printk( KERN_ALERT "%d\t%s\n", task->pid, task->comm );
printk(KERN_ALERT "%d\t%s\n", task->pid, task->comm);
}
break;
case 3 :
method = "list_for_each_entry";
list_for_each_entry( p, &task->tasks, tasks )
list_for_each_entry(pTask, &task->tasks, tasks)
{
count++;
printk( KERN_ALERT "%d\t%s\n", p->pid, p->comm );
printk(KERN_ALERT "%d\t%s\n", pTask->pid, pTask->comm);
}
break;
}
printk( "The method is %s\n", method );
printk("there are %d process in your system now...", count);
printk(KERN_ALERT "The method is %s\n", method);
printk(KERN_ALERT "there are %d process in your system now...\n", count);
return 0;
}
static void list_process_exit(void)
{
printk( KERN_ALERT "GOOD BYE!!\n");
printk(KERN_ALERT "GOOD BYE!!\n");
}