| Dir : /proc/self/root/opt/saltstack/salt/extras-3.10/pyroute2/inotify/ |
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| Dir : //proc/self/root/opt/saltstack/salt/extras-3.10/pyroute2/inotify/inotify_fd.py |
import ctypes
import ctypes.util
import os
import select
import socket
import threading
from pyroute2.inotify.inotify_msg import inotify_msg
class Inotify(object):
def __init__(self, libc=None, path=None):
self.fd = None
self.wd = {}
self.ctlr, self.ctlw = os.pipe()
self.path = set(path)
self._poll = select.poll()
self._poll.register(self.ctlr)
self.lock = threading.RLock()
self.libc = libc or ctypes.CDLL(
ctypes.util.find_library('c'), use_errno=True
)
def bind(self, *argv, **kwarg):
with self.lock:
if self.fd is not None:
raise socket.error(22, 'Invalid argument')
self.fd = self.libc.inotify_init()
self._poll.register(self.fd)
for path in self.path:
self.register_path(path)
def register_path(self, path, mask=0x100 | 0x200):
os.stat(path)
with self.lock:
if path in self.wd:
return
if self.fd is not None:
s_path = ctypes.create_string_buffer(path.encode('utf-8'))
wd = self.libc.inotify_add_watch(
self.fd, ctypes.byref(s_path), mask
)
self.wd[wd] = path
self.path.add(path)
def unregister_path(self):
pass
def get(self):
#
events = self._poll.poll()
for fd, event in events:
if fd == self.fd:
data = os.read(self.fd, 4096)
for msg in self.parse(data):
yield msg
else:
yield
def close(self):
with self.lock:
if self.fd is not None:
os.write(self.ctlw, b'\0')
for fd in (self.fd, self.ctlw, self.ctlr):
if fd is not None:
try:
os.close(fd)
self._poll.unregister(fd)
except Exception:
pass
def parse(self, data):
offset = 0
while offset <= len(data) - 16:
# pick one header
msg = inotify_msg(data, offset=offset)
msg.decode()
if msg['wd'] == 0:
break
msg['path'] = self.wd[msg['wd']]
offset += msg.length
yield msg