validators fs -> os

kvmd/validators/os.py

@@ -0,0 +1,63 @@
+# ========================================================================== #
+#                                                                            #
+#    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 os
+
+from typing import List
+from typing import Any
+
+from . import raise_error
+from . import check_not_none_string
+
+from .basic import valid_number
+from .basic import valid_string_list
+
+
+# =====
+def valid_abs_path(arg: Any, exists: bool=False, name: str="") -> str:
+    if not name:
+        name = ("existent absolute path" if exists else "absolute path")
+
+    if len(str(arg).strip()) == 0:
+        arg = None
+    arg = check_not_none_string(arg, name)
+
+    arg = os.path.abspath(arg)
+    if exists and not os.access(arg, os.F_OK):
+        raise_error(arg, name)
+    return arg
+
+
+def valid_abs_path_exists(arg: Any, name: str="") -> str:
+    return valid_abs_path(arg, exists=True, name=name)
+
+
+def valid_unix_mode(arg: Any) -> int:
+    return int(valid_number(arg, min=0, name="UNIX mode"))
+
+
+def valid_command(arg: Any) -> List[str]:
+    cmd = valid_string_list(arg, delim=r"[,\t]+", name="command")
+    if len(cmd) == 0:
+        raise_error(arg, "command")
+    cmd[0] = valid_abs_path_exists(cmd[0], name="command entry point")
+    return cmd