Move signal handling code into the C module

kitty/utils.py

@@ -6,7 +6,6 @@ import math
 import os
 import re
 import shlex
-import signal
 import string
 import subprocess
 from contextlib import contextmanager
@@ -153,29 +152,6 @@ def parse_color_set(raw):
             continue
 
 
-def pipe2():
-    try:
-        read_fd, write_fd = os.pipe2(os.O_NONBLOCK | os.O_CLOEXEC)
-    except AttributeError:
-        import fcntl
-        read_fd, write_fd = os.pipe()
-        for fd in (read_fd, write_fd):
-            flag = fcntl.fcntl(fd, fcntl.F_GETFD)
-            fcntl.fcntl(fd, fcntl.F_SETFD, flag | fcntl.FD_CLOEXEC)
-            flag = fcntl.fcntl(fd, fcntl.F_GETFL)
-            fcntl.fcntl(fd, fcntl.F_SETFL, flag | os.O_NONBLOCK)
-    return read_fd, write_fd
-
-
-def handle_unix_signals():
-    read_fd, write_fd = pipe2()
-    for sig in (signal.SIGINT, signal.SIGTERM):
-        signal.signal(sig, lambda x, y: None)
-        signal.siginterrupt(sig, False)
-    signal.set_wakeup_fd(write_fd)
-    return read_fd
-
-
 def get_primary_selection():
     if isosx:
         return ''  # There is no primary selection on OS X