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fcntl lock

fcntl lock

这三个函数的作用都是给文件加锁，那它们有什么区别呢？ 首先flock和fcntl是系统调用，而lockf是库函数。lockf实际上是fcntl的封装，所以lockf和fcntl的底层实现是一样的，对文件加锁的效果也是一样的。后面分析不同点时大多数

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