SIGHUP for reloading configuration

Question

According to signal(7), SIGHUP is used to detect hangup on controlling terminal or death of controlling process.

However, I have come across a

Answer 1

In my experience, SIGHUP is commonly used to request that a daemon reload its configuration. Using this well-known technique follows the principle of least surprise. Your users have likely encountered daemons which do exactly this, so they'll immediately understand what SIGHUP means to your daemon.