内核:如何迭代当前进程的子进程?

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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, &current->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.