read t

Q: What is the read -t command in Bash? A: The read -t command in Bash is used to read input from the user with a timeout specified. For instance, read -t 10 var waits for the user to input data for 10 seconds. If no input is received within that timeframe, the command exits. Q: Why does read -t sometimes return before the timeout in environments with high signal activity? A: In environments with high signal activity, such as when many processes are sending signals to each other, read -t can return prematurely. This happens because the system call underlying read, which is used to fetch user input, is interrupted by incoming signals.