mirror of
https://github.com/mofeng-git/One-KVM.git
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39 lines
1.9 KiB
Python
39 lines
1.9 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main PiKVM daemon. #
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# #
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# Copyright (C) 2018-2022 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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from . import env
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# =====
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def find_udc(udc: str) -> str:
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path = f"{env.SYSFS_PREFIX}/sys/class/udc"
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candidates = sorted(os.listdir(path))
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if not udc:
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if len(candidates) == 0:
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raise RuntimeError("Can't find any UDC")
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udc = candidates[0]
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elif udc not in candidates:
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raise RuntimeError(f"Can't find selected UDC: {udc}")
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return udc # fe980000.usb
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