Function termination_signal_handler

tests/test_with_catch/catch.cpp:129–137

Signal handler to print a message when the process is terminated. Uses only async-signal-safe functions.

// Signal handler to print a message when the process is terminated.
// Uses only async-signal-safe functions.
void termination_signal_handler(int sig) {
    const char *msg = "[  SIGNAL  ] Process received SIGTERM\n";
    // write() is async-signal-safe, unlike std::cout
    ssize_t written = write(STDOUT_FILENO, msg, strlen(msg));
    (void) written; // suppress "unused variable" warnings
    // Re-raise with default handler to get proper exit status
    std::signal(sig, SIG_DFL);
    std::raise(sig);
}
#endif

} // namespace