FIX: Warning message about not enough space when copying to ramfs (fixes #753)

src/platform/uOSUtils.pas

@@ -3,7 +3,7 @@
     -------------------------------------------------------------------------
     This unit contains platform depended functions.
 
-    Copyright (C) 2006-2022 Alexander Koblov (alexx2000@mail.ru)
+    Copyright (C) 2006-2023 Alexander Koblov (alexx2000@mail.ru)
 
     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
@@ -204,6 +204,9 @@ uses
     {$ELSEIF NOT DEFINED(HAIKU)}
   , uGio, uClipboard, uXdg, uKde
     {$ENDIF}
+    {$IF DEFINED(LINUX)}
+  , DCUnix, uMyLinux
+    {$ENDIF}
   {$ENDIF}
   ;
 
@@ -458,6 +461,12 @@ var
 begin
   Result:= (fpStatFS(PAnsiChar(CeUtf8ToSys(Path)), @sbfs) = 0);
   if not Result then Exit;
+{$IFDEF LINUX}
+  if (sbfs.fstype = RAMFS_MAGIC) then
+  begin
+    Exit(GetFreeMem(FreeSize, TotalSize));
+  end;
+{$ENDIF}
   FreeSize := (Int64(sbfs.bavail) * sbfs.bsize);
   TotalSize := (Int64(sbfs.blocks) * sbfs.bsize);
 end;

src/platform/unix/linux/umylinux.pas

@@ -0,0 +1,100 @@
+{
+   Double Commander
+   -------------------------------------------------------------------------
+   This unit contains specific LINUX functions.
+
+   Copyright (C) 2023 Alexander Koblov (alexx2000@mail.ru)
+
+   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 2 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 <http://www.gnu.org/licenses/>.
+}
+
+unit uMyLinux;
+
+{$mode delphi}
+
+interface
+
+uses
+  SysUtils;
+
+function GetFreeMem(out MemFree, MemTotal: Int64): Boolean;
+
+implementation
+
+uses
+  DCStrUtils;
+
+function Convert(const S: String; Index: Integer): Int64;
+var
+  V: String;
+  K: Integer;
+begin
+  K:= 1;
+  V:= Trim(Copy(S, Index, MaxInt));
+  while (V[K] in ['0'..'9']) do Inc(K);
+  Result:= StrToInt64Def(Copy(V, 1, K - 1), 0);
+  V:= Trim(Copy(V, K, MaxInt));
+  if Length(V) > 0 then
+  begin
+    case LowerCase(V[1]) of
+      'k': Result:= Result * 1024;
+      'm': Result:= Result * 1024 * 1024;
+      'g': Result:= Result * 1024 * 1024 * 1024;
+    end;
+  end;
+end;
+
+function GetFreeMem(out MemFree, MemTotal: Int64): Boolean;
+var
+  S: String;
+  F: TextFile;
+  Count: Integer = 0;
+  MemAvailable: Int64;
+begin
+  try
+    AssignFile(F, '/proc/meminfo');
+    try
+      Reset(F);
+      repeat
+        ReadLn(F, S);
+        if StrBegins(S, 'MemTotal:') then
+        begin
+          Inc(Count);
+          MemTotal:= Convert(S, 10);
+        end
+        else if StrBegins(S, 'MemFree:') then
+        begin
+          Inc(Count);
+          MemFree:= Convert(S, 9);
+        end
+        else if StrBegins(S, 'MemAvailable:') then
+        begin
+          Inc(Count);
+          MemAvailable:= Convert(S, 14);
+        end;
+      until EOF(F) or (Count = 3);
+      if MemAvailable < MemTotal then
+      begin
+        MemFree:= MemAvailable;
+      end;
+      Result:= (Count = 3);
+    finally
+      System.Close(F);
+    end;
+  except
+    Result:= False;
+  end;
+end;
+
+end.