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问题描述
在 Linux Kernel Development, 3rd ed 中,此代码用于遍历当前进程的子进程.
In Linux Kernel Development, 3rd ed, this code was given for traversing the children of the current process.
list_for_each(list, ¤t->children) { task = list_entry(list, struct task_struct, sibling); /* task now points to one of current’s children */ }这个习语中的兄弟姐妹"看起来不合适.它的目的是什么?
The "sibling" in this idiom looks out of place. What is its purpose?
推荐答案sibling 是 struct task_struct 中的 list_head 结构的名称对应于父级的子级列表.
sibling is the name of the list_head structure in struct task_struct that corresponds to the parent's children list.
也就是说,在这个循环中,list 总是指向 struct task_struct 的 sibling 成员,或者 children代码>父级成员.
That is, in this loop list always points to a sibling member of a struct task_struct, or the children member of the parent.
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内核:如何迭代当前进程的子进程?
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