How to terminate a process on SIGPIPE?

Question

I have a server program that uses IPv4. The server has to attend multiple calls from client, so it creates a child process every time it accepts a client socket connection to deal with the client.

The child process is expected to read from client and then write to client socket. If it receives a SIGPIPE (from a bad client that closes before writing), it should terminate as the child's job is done. Do I explicitly declare a signal handler or does SIGPIPE terminate it by default? I am a beginner so please accept my ignorance if any.

Answer 1

From man 7 signal:

The entries in the "Action" column of the table below specify the default
disposition for each signal, as follows:

    Term   Default action is to terminate the process.
    [...]

Then, later on in the table:

Signal      Standard   Action   Comment
────────────────────────────────────────────────────────────────────────
[...]
SIGPIPE      P1990      Term    Broken pipe: write to pipe with no
                                readers; see pipe(7)

So you don't need to do anything, the default signal handler will terminate the process.