Signal: "SIGHUP" | "SIGINT" | "SIGQUIT" | "SIGILL" | "SIGTRAP" | "SIGABRT" | "SIGBUS" | "SIGFPE" | "SIGKILL" | "SIGUSR1" | "SIGSEGV" | "SIGUSR2" | "SIGPIPE" | "SIGALRM" | "SIGTERM" | "SIGSTKFLT" | "SIGCHLD" | "SIGCONT" | "SIGSTOP" | "SIGTSTP" | "SIGTTIN" | "SIGTTOU" | "SIGURG" | "SIGXCPU" | "SIGXFSZ" | "SIGVTALRM" | "SIGPROF" | "SIGWINCH" | "SIGPOLL" | "SIGPWR" | "SIGSYS"