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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2022 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import sys
import os
import ctypes
import ctypes.util
from ctypes import c_int
from ctypes import c_uint
from ctypes import c_char_p
# =====
def main() -> None:
if len(sys.argv) != 3:
raise SystemExit(f"Usage: {sys.argv[0]} <file1> <file2>")
path = ctypes.util.find_library("c")
if not path:
raise SystemExit("Where is libc?")
assert path
libc = ctypes.CDLL(path)
libc.renameat2.restype = c_int
libc.renameat2.argtypes = [c_int, c_char_p, c_int, c_char_p, c_uint]
result = libc.renameat2(
-100, # AT_FDCWD
os.fsencode(sys.argv[1]),
-100,
os.fsencode(sys.argv[2]),
(1 << 1), # RENAME_EXCHANGE
)
if result != 0:
raise SystemExit(f"{sys.argv[0]}: {os.strerror(ctypes.get_errno())}")
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