mirror of
https://github.com/mofeng-git/One-KVM.git
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72 lines
3.3 KiB
Python
72 lines
3.3 KiB
Python
#!/usr/bin/env python3
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# ========================================================================== #
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# #
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# KVMD - The main Pi-KVM daemon. #
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# #
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# Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import os
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import signal
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import errno
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import argparse
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import psutil
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# =====
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def _set_msd_image(gadget: str, path: str) -> None:
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lun_file_path = os.path.join("/sys/kernel/config/usb_gadget", gadget, "functions/mass_storage.usb0/lun.0/file")
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try:
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with open(lun_file_path, "w") as lun_file:
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lun_file.write(path + "\n")
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except OSError as err:
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if err.errno == errno.EBUSY:
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raise SystemExit(f"Can't change image because device is locked: {str(err)}")
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raise
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def _reset_msd() -> None:
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# https://github.com/torvalds/linux/blob/3039fadf2bfdc104dc963820c305778c7c1a6229/drivers/usb/gadget/function/f_mass_storage.c#L2924
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found = False
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for proc in psutil.process_iter():
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attrs = proc.as_dict(attrs=["name", "exe", "pid"])
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if attrs.get("name") == "file-storage" and not attrs.get("exe"):
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try:
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proc.send_signal(signal.SIGUSR1)
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found = True
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except Exception as err:
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SystemExit(f"Can't send SIGUSR1 to MSD kernel thread with pid={attrs['pid']}: {str(err)}")
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if not found:
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raise SystemExit("Can't find MSD kernel thread")
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# =====
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def main() -> None:
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parser = argparse.ArgumentParser(description="KVMD OTG MSD Helper")
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parser.add_argument("--reset", action="store_true", help="Send SIGUSR1 to MSD kernel thread")
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parser.add_argument("--set-image", dest="image_path", default=None, help="Change active image path")
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parser.add_argument("--gadget", default="kvmd", help="USB gadget name")
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options = parser.parse_args()
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if options.reset:
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_reset_msd()
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if options.image_path is not None:
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_set_msd_image(options.gadget, options.image_path)
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