aiohelpers

kvmd/aiohelpers.py

@@ -0,0 +1,50 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main PiKVM daemon.                                           #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    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 subprocess
+
+from typing import List
+
+from .logging import get_logger
+
+from . import tools
+from . import aioproc
+
+
+# =====
+async def remount(name: str, base_cmd: List[str], rw: bool) -> bool:
+    logger = get_logger(1)
+    mode = ("rw" if rw else "ro")
+    cmd = [
+        part.format(mode=mode)
+        for part in base_cmd
+    ]
+    logger.info("Remounting %s storage to %s: %s ...", name, mode.upper(), cmd)
+    try:
+        proc = await aioproc.log_process(cmd, logger)
+        if proc.returncode != 0:
+            assert proc.returncode is not None
+            raise subprocess.CalledProcessError(proc.returncode, cmd)
+    except Exception as err:
+        logger.error("Can't remount %s storage: %s", name, tools.efmt(err))
+        return False
+    return True