Considerations for using the Write function in Linux socket programming

Many people think that using write and sending data using send is the same, and you can actually send data, but one thing to note:

The Write function does not guarantee that the sent data can be sent at once, possibly sending only a portion (when the kernel sends a buffer full), which destroys the "atomicity" of the data sent, which is only the process of sending a single packet that is not affected by other send operations. If the middle is interrupted, then the other threads on the same socket will be sent to the sending operation, resulting in the final packet confusion. So it's best to send it using send.

But it is not that send will not be interrupted, the send operation will be interrupted when there is information coming in the process of sending.

Considerations for using the Write function in Linux socket programming