proc c_raise(signalnum: cint): cint {.importc: "raise", header: "<signal.h>",
                                      ...raises: [], tags: [], forbids: [].}

proc getsignal(signalnum: int): PySigHandler {....raises: [ValueError], tags: [],
    forbids: [].}

proc pidfd_send_signal(pid: int; sig: int; siginfo: struct_siginfo = nil;
                       flags = 0) {....raises: [PyOSError], tags: [], forbids: [].}

proc raise_signal(signalnum: int) {....raises: [PyOSError], tags: [], forbids: [].}

proc strsignal(signalnum: int): string {....raises: [ValueError], tags: [],
    forbids: [].}