Resolve pathes before adding them to the search path.

Working with canonical fullpathes everywhere makes debugging easier.
And it will be used in a later commit to make sure, that each path is
added only once.

src/backends/unix/system.c

@@ -519,6 +519,20 @@ Sys_RemoveDir(const char *path)
 	}
 }
 
+void
+Sys_Realpath(const char *in, char *out, size_t size)
+{
+	char *converted = realpath(in, NULL);
+
+	if (converted == NULL)
+	{
+		Com_Error(ERR_FATAL, "Couldn't get realpath for %s\n", in);
+	}
+
+	Q_strlcpy(out, converted, size);
+	free(converted);
+}
+
 /* ================================================================ */
 
 void *

src/backends/windows/system.c

@@ -586,6 +586,23 @@ Sys_RemoveDir(const char *path)
 	RemoveDirectoryW(wpath);
 }
 
+void
+Sys_Realpath(const char *in, char *out, size_t size)
+{
+	WCHAR win[MAX_OSPATH] = {0};
+	WCHAR wconverted[MAX_OSPATH] = {0};
+
+	MultiByteToWideChar(CP_UTF8, 0, in, -1, win, sizeof(win));
+	_wfullpath(wconverted, win, size);
+
+	if (wconverted == NULL)
+	{
+		Com_Error(ERR_FATAL, "Couldn't get realpath for %s\n", in);
+	}
+
+	WideCharToMultiByte(CP_UTF8, 0, wconverted, -1, out, size, NULL, NULL);
+}
+
 /* ======================================================================= */
 
 void *

src/common/filesystem.c

@@ -1805,9 +1805,12 @@ const char* FS_GetFilenameForHandle(fileHandle_t f)
 // --------
 
 void FS_AddDirToRawPath (const char *rawdir, qboolean create) {
-	// Convert backslashes to forward slashes.
-	char *dir = strdup(rawdir);
+	char dir[MAX_OSPATH] = {0};
 
+	// Get the realpath.
+	Sys_Realpath(rawdir, dir, sizeof(dir));
+
+	// Convert backslashes to forward slashes.
 	for (int i = 0; i < strlen(dir); i++)
 	{
 		if (dir[i] == '\\')
@@ -1835,9 +1838,6 @@ void FS_AddDirToRawPath (const char *rawdir, qboolean create) {
 	search->create = create;
 	search->next = fs_rawPath;
 	fs_rawPath = search;
-
-	// Cleanup
-	free(dir);
 }
 
 

src/common/header/common.h

@@ -821,6 +821,7 @@ void *Sys_GetGameAPI(void *parms);
 void Sys_UnloadGame(void);
 void Sys_GetWorkDir(char *buffer, size_t len);
 qboolean Sys_SetWorkDir(char *path);
+void Sys_Realpath(const char *in, char *out, size_t size);
 
 // Windows only (system.c)
 #ifdef _WIN32