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Nicer implementation of eintr_retry that does not prevent type checking of wrapped functions arguments

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Kovid Goyal 2022-07-13 15:50:45 +05:30
parent 32dcbbb5e1
commit cb5157f2d1
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 13 additions and 11 deletions
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20
kitty/prewarm.py
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@ -385,13 +385,15 @@ class SocketChildData:
self.env: Dict[str, str] = {}
T = TypeVar('T')
Funtion = TypeVar('Funtion', bound=Callable[..., Any])
def eintr_retry(func: Callable[..., T], *args: Any) -> T:
def eintr_retry(func: Funtion) -> Funtion:
def ret(*a: Any, **kw: Any) -> Any:
while True:
with suppress(InterruptedError):
return func(*args)
return func(*a, **kw)
return cast(Funtion, ret)
interactive_and_job_control_signals = (
@ -405,15 +407,15 @@ def fork_socket_child(child_data: SocketChildData, tty_fd: int, stdio_fds: Dict[
if child_pid:
return child_pid
# child process
eintr_retry(os.setpgid, 0, 0)
eintr_retry(os.tcsetpgrp, tty_fd, eintr_retry(os.getpgid, 0))
eintr_retry(os.setpgid)(0, 0)
eintr_retry(os.tcsetpgrp)(tty_fd, eintr_retry(os.getpgid)(0))
for x in interactive_and_job_control_signals:
signal.signal(x, signal.SIG_DFL)
restore_python_signal_handlers()
# the std streams fds are closed in free_non_child_resources()
for which in ('stdin', 'stdout', 'stderr'):
fd = stdio_fds[which] if stdio_fds[which] > -1 else tty_fd
os.dup2(fd, getattr(sys, which).fileno())
eintr_retry(os.dup2)(fd, getattr(sys, which).fileno())
free_non_child_resources()
child_main({'cwd': child_data.cwd, 'env': child_data.env, 'argv': child_data.argv})
@ -497,7 +499,7 @@ def fork_socket_child_supervisor(conn: socket.socket, free_non_child_resources:
if record:
try:
with open(os.open(os.ctermid(), os.O_RDWR | os.O_CLOEXEC), 'w') as f:
eintr_retry(fcntl.ioctl, f.fileno(), termios.TIOCSWINSZ, record)
eintr_retry(fcntl.ioctl)(f.fileno(), termios.TIOCSWINSZ, record)
except OSError:
traceback.print_exc()
from_socket_buf = bytes(data)
@ -569,8 +571,8 @@ def fork_socket_child_supervisor(conn: socket.socket, free_non_child_resources:
if child_pid:
# this is also done in the child process, but we dont
# know when, so do it here as well
eintr_retry(os.setpgid, child_pid, child_pid)
eintr_retry(os.tcsetpgrp, tty_fd, child_pid)
eintr_retry(os.setpgid)(child_pid, child_pid)
eintr_retry(os.tcsetpgrp)(tty_fd, child_pid)
for fd in stdio_fds.values():
if fd > -1:
os.close(fd)