56 lines
1.5 KiB
Python
Executable File
56 lines
1.5 KiB
Python
Executable File
#
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# Copyright 2015 Per Olofsson
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# flake8: noqa
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import os
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from ctypes import *
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libc = CDLL("/usr/lib/libc.dylib")
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# int launch_activate_socket(const char *name, int **fds, size_t *cnt)
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libc.launch_activate_socket.restype = c_int
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libc.launch_activate_socket.argtypes = [
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c_char_p,
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POINTER(POINTER(c_int)),
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POINTER(c_size_t),
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]
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class LaunchDError(Exception):
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pass
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def launch_activate_socket(name):
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"""Retrieve named socket file descriptors from launchd."""
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# Wrap in try/finally to free resources allocated during lookup.
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try:
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fds = POINTER(c_int)()
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cnt = c_size_t(0)
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err = libc.launch_activate_socket(name.encode(), byref(fds), byref(cnt))
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if err:
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raise LaunchDError(
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f"Failed to retrieve sockets from launchd: {os.strerror(err)}"
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)
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# Return a list of file descriptors.
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return list(fds[x] for x in range(cnt.value))
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finally:
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if fds:
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libc.free(fds)
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