func.py 文件源码

def ptrace(command, pid=0, arg1=0, arg2=0, check_errno=False):
    if HAS_CPTRACE:
        try:
            set_errno(0)
            result = _ptrace(command, pid, arg1, arg2, check_errno)
        except ValueError as errobj:
            message = str(errobj)
            errno = get_errno()
            raise PtraceError(message, errno=errno, pid=pid)
    else:
        result = _ptrace(command, pid, arg1, arg2)
        result_signed = c_long(result).value
        if result_signed == -1:
            errno = get_errno()
            # peek operations may returns -1 with errno=0:
            # it's not an error. For other operations, -1
            # is always an error
            if not(check_errno) or errno:
                message = "ptrace(cmd=%s, pid=%s, %r, %r) error #%s: %s" % (
                    command, pid, arg1, arg2,
                    errno, strerror(errno))
                raise PtraceError(message, errno=errno, pid=pid)
    return result