Powerful Command-Line Applications in Go

Handling Signals

The last feature you’ll add to goci is the ability to handle operating system signals. Signals are commonly used on Unix/Linux operating systems to communicate events among running processes. Typically, signals are used to terminate programs that aren’t responding or are running for a long time. For example, pressing Ctrl+C on the keyboard sends the 8nterrupt signal (SIGINT) to a running program, which interrupts its execution.

In Go, you handle signals by using the os/signal package. For more information consult its documentation.^[37]

By default, when a program receives an interrupt signal, it stops executing immediately. This can lead to data loss and other consequences. It’s important to handle signals appropriately so the ...