1 files changed, 79 insertions, 0 deletions
diff --git a/kvmd/plugins/msd/otg/helpers.py b/kvmd/plugins/msd/otg/helpers.py
new file mode 100644
index 00000000..ee759ef0
--- /dev/null
+++ b/kvmd/plugins/msd/otg/helpers.py
@@ -0,0 +1,79 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  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 signal
+import asyncio
+import asyncio.subprocess
+
+from typing import List
+
+from ....logging import get_logger
+
+from .. import MsdError
+
+
+# =====
+async def remount_storage(base_cmd: List[str], rw: bool) -> None:
+    logger = get_logger(0)
+    mode = ("rw" if rw else "ro")
+    cmd = [
+        part.format(mode=mode)
+        for part in base_cmd
+    ]
+    logger.info("Remounting internal storage to %s ...", mode.upper())
+    try:
+        await _run_helper(cmd)
+    except Exception:
+        logger.error("Can't remount internal storage")
+        raise
+
+
+async def unlock_drive(base_cmd: List[str]) -> None:
+    logger = get_logger(0)
+    logger.info("Unlocking the drive ...")
+    try:
+        await _run_helper(base_cmd)
+    except Exception:
+        logger.error("Can't unlock the drive")
+        raise
+
+
+# =====
+async def _run_helper(cmd: List[str]) -> None:
+    logger = get_logger(0)
+    logger.info("Executing helper %s ...", cmd)
+
+    proc = await asyncio.create_subprocess_exec(
+        *cmd,
+        stdout=asyncio.subprocess.PIPE,
+        stderr=asyncio.subprocess.STDOUT,
+        preexec_fn=(lambda: signal.signal(signal.SIGINT, signal.SIG_IGN)),
+    )
+
+    stdout = (await proc.communicate())[0].decode(errors="ignore").strip()
+    if stdout:
+        log = (logger.info if proc.returncode == 0 else logger.error)
+        for line in stdout.split("\n"):
+            log("Console: %s", line)
+
+    if proc.returncode != 0:
+        raise MsdError(f"Error while helper execution: pid={proc.pid}; retcode={proc.returncode}")