def forward_all_signals(target_pid, process_name):
def forwarding_signal_handler(signum):
logging.debug("Forwarding signal %d to process %s.", signum, process_name)
try:
os.kill(forwarding_signal_handler.target_pid, signum)
except OSError as e:
logging.debug("Could not forward signal %d to process %s: %s", signum, process_name, e)
# Somehow we get a Python SystemError sometimes if we access target_pid directly from inside function.
forwarding_signal_handler.target_pid = target_pid
for signum in _FORWARDABLE_SIGNALS:
# Need to directly access libc function,
# the state of the signal module is incorrect due to the clone()
# (it may think we are in a different thread than the main thread).
libc.signal(signum, forwarding_signal_handler)
def forward_all_signals_async(target_pid, process_name):
"""Install all signal handler that forwards all signals to the given process."""
def forwarding_signal_handler(signum):
_forward_signal(signum, process_name, forwarding_signal_handler.target_pid)
# Somehow we get a Python SystemError sometimes if we access target_pid directly from inside function.
forwarding_signal_handler.target_pid = target_pid
for signum in _FORWARDABLE_SIGNALS:
# Need to directly access libc function,
# the state of the signal module is incorrect due to the clone()
# (it may think we are in a different thread than the main thread).
libc.signal(signum, forwarding_signal_handler)
# Reactivate delivery of signals such that our handler gets called.
reset_signal_handling()
def forward_all_signals_async(target_pid, process_name):
"""Install all signal handler that forwards all signals to the given process."""
def forwarding_signal_handler(signum):
_forward_signal(signum, process_name, forwarding_signal_handler.target_pid)
# Somehow we get a Python SystemError sometimes if we access target_pid directly from inside function.
forwarding_signal_handler.target_pid = target_pid
for signum in _FORWARDABLE_SIGNALS:
# Need to directly access libc function,
# the state of the signal module is incorrect due to the clone()
# (it may think we are in a different thread than the main thread).
libc.signal(signum, forwarding_signal_handler)
# Reactivate delivery of signals such that our handler gets called.
reset_signal_handling()