如果fd被关闭而其他功能被阻塞怎么办？

Question

根据pipe的手册页：

If a process attempts to read from an empty pipe, then read(2) will
block until data is available.  If a process attempts to write to a
full pipe (see below), then write(2) blocks until sufficient data has
been read from the pipe to allow the write to complete.  Nonblocking
I/O is possible by using the fcntl(2) F_SETFL operation to enable the
O_NONBLOCK open file status flag.

我有这样一个问题：

如果管道缓冲区为空;

读取在管道上阻塞;

现在，如果正在关闭写入结束，是否会自动取消阻止读取？

Answer 1

是的，read将被取消阻止并返回EOF（0）。