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unit UPlatformLinux;
interface
{$IFDEF FPC}
{$MODE Delphi}
{$ENDIF}
{$I switches.inc}
uses
Classes,
UPlatform,
UConfig;
type
TPlatformLinux = class(TPlatform)
private
UseLocalDirs: boolean;
procedure DetectLocalExecution();
function GetHomeDir(): string;
public
procedure Init; override;
function DirectoryFindFiles(Dir, Filter: WideString; ReturnAllSubDirs: Boolean): TDirectoryEntryArray; override;
function GetLogPath : WideString; override;
function GetGameSharedPath : WideString; override;
function GetGameUserPath : WideString; override;
end;
implementation
uses
UCommandLine,
BaseUnix,
{$IF FPC_VERSION_INT >= 2002002}
pwd,
{$IFEND}
SysUtils,
ULog;
const
{$I paths.inc}
procedure TPlatformLinux.Init;
begin
inherited Init();
DetectLocalExecution();
end;
{**
* Detects whether the game was executed locally or globally.
* - It is local if it was not installed and directly executed from
* within the game folder. In this case resources (themes, language-files)
* reside in the directory of the executable.
* - It is global if the game was installed (e.g. to /usr/bin) and
* the resources are in a separate folder (e.g. /usr/share/ultrastardx)
* which name is stored in the INSTALL_DATADIR constant in paths.inc.
*
* Sets UseLocalDirs to true if the game is executed locally, false otherwise.
*}
procedure TPlatformLinux.DetectLocalExecution();
var
LocalDir: string;
begin
LocalDir := GetExecutionDir();
// we just check if the 'languages' folder exists in the
// directory of the executable. If so -> local execution.
UseLocalDirs := (DirectoryExists(LocalDir + 'languages'));
end;
function TPlatformLinux.DirectoryFindFiles(Dir, Filter: WideString; ReturnAllSubDirs: Boolean): TDirectoryEntryArray;
var
i: Integer;
TheDir : pDir;
ADirent : pDirent;
Entry : Longint;
lAttrib : integer;
begin
i := 0;
Filter := LowerCase(Filter);
TheDir := FpOpenDir( Dir );
if Assigned(TheDir) then
begin
repeat
ADirent := FpReadDir(TheDir^);
if Assigned(ADirent) and (ADirent^.d_name <> '.') and (ADirent^.d_name <> '..') then
begin
lAttrib := FileGetAttr(Dir + ADirent^.d_name);
if ReturnAllSubDirs and ((lAttrib and faDirectory) <> 0) then
begin
SetLength( Result, i + 1);
Result[i].Name := ADirent^.d_name;
Result[i].IsDirectory := true;
Result[i].IsFile := false;
i := i + 1;
end
else if (Length(Filter) = 0) or (Pos( Filter, LowerCase(ADirent^.d_name)) > 0) then
begin
SetLength( Result, i + 1);
Result[i].Name := ADirent^.d_name;
Result[i].IsDirectory := false;
Result[i].IsFile := true;
i := i + 1;
end;
end;
until (ADirent = nil);
FpCloseDir(TheDir^);
end;
end;
function TPlatformLinux.GetLogPath: WideString;
begin
if UseLocalDirs then
Result := GetExecutionDir()
else
Result := GetGameUserPath() + 'logs/';
// create non-existing directories
ForceDirectories(Result);
end;
function TPlatformLinux.GetGameSharedPath: WideString;
begin
if UseLocalDirs then
Result := GetExecutionDir()
else
Result := IncludeTrailingPathDelimiter(INSTALL_DATADIR);
end;
function TPlatformLinux.GetGameUserPath: WideString;
begin
if UseLocalDirs then
Result := GetExecutionDir()
else
Result := GetHomeDir() + '.ultrastardx/';
end;
{**
* Returns the user's home directory terminated by a path delimiter
*}
function TPlatformLinux.GetHomeDir(): string;
{$IF FPC_VERSION_INT >= 2002002}
var
PasswdEntry: PPasswd;
{$IFEND}
begin
Result := '';
{$IF FPC_VERSION_INT >= 2002002}
// try to retrieve the info from passwd
PasswdEntry := FpGetpwuid(FpGetuid());
if (PasswdEntry <> nil) then
Result := PasswdEntry.pw_dir;
{$IFEND}
// fallback if passwd does not contain the path
if (Result = '') then
Result := GetEnvironmentVariable('HOME');
// add trailing path delimiter (normally '/')
if (Result <> '') then
Result := IncludeTrailingPathDelimiter(Result);
{$IF FPC_VERSION_INT >= 2002002}
// GetUserDir() is another function that returns a user path.
// It uses env-var HOME or a fallback to a temp-dir.
//Result := GetUserDir();
{$IFEND}
end;
end.
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