C语言中的write（）函数是阻塞还是非阻塞？
[英]Is the write() function in C blocking or non-blocking?
问题描述
I looked on the Linux man pages for the answer but can't seem to find it. 
我在Linux手册页上寻找了答案，但似乎找不到。 I know that read() is blocking but I'm still not sure about write() . 我知道read()会阻塞，但是我仍然不确定write() 。 Can anyone point me to any documentation for clarification? 谁能指出我要澄清的任何文档？
1 个解决方案
解决方案1
10 已采纳 2017-02-24 23:40:17
Read POSIX on read() and write() . 在read()和write()上read() POSIX。 See also functions such as open() and pipe() . 另请参见open()和pipe()函数。
It depends on the attributes of the file descriptor you're reading from or writing to (think O_NONBLOCK , for example), and on the underlying file type (disk file vs pipe vs FIFO vs socket vs character or block special), and so on. 它取决于您正在读取或写入的文件描述符的属性（例如，考虑O_NONBLOCK ），以及底层文件类型（磁盘文件，管道，FIFO，FIFO，套接字，字符或特殊块）等等。 。
Succinctly, both read() and write() can be blocking or non-blocking, depending on circumstances. 简而言之，根据情况， read()和write()都可以是阻塞的或非阻塞的。
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