refactoring

kvmd/aioproc.py

@@ -0,0 +1,48 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  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 asyncio
+import asyncio.subprocess
+import signal
+
+from typing import Tuple
+from typing import List
+
+
+# =====
+async def run_process(cmd: List[str], err_to_null: bool=False) -> asyncio.subprocess.Process:  # pylint: disable=no-member
+    return (await asyncio.create_subprocess_exec(
+        *cmd,
+        stdout=asyncio.subprocess.PIPE,
+        stderr=(asyncio.subprocess.DEVNULL if err_to_null else asyncio.subprocess.STDOUT),
+        preexec_fn=preexec_ignore_sigint,
+    ))
+
+
+async def read_process(cmd: List[str], err_to_null: bool=False) -> Tuple[asyncio.subprocess.Process, str]:  # pylint: disable=no-member
+    proc = await run_process(cmd, err_to_null)
+    (stdout, _) = await proc.communicate()
+    return (proc, stdout.decode(errors="ignore").strip())
+
+
+def preexec_ignore_sigint() -> None:
+    signal.signal(signal.SIGINT, signal.SIG_IGN)