BACKENDS: Add better error handling to OSystem_Win32::getDefaultConfigFileName()

1 files changed, 20 insertions, 4 deletions

diff --git a/backends/platform/sdl/win32/win32.cpp b/backends/platform/sdl/win32/win32.cpp
index 5b02a20abc..814f1955fe 100644
--- a/backends/platform/sdl/win32/win32.cpp
+++ b/backends/platform/sdl/win32/win32.cpp
@@ -155,18 +155,31 @@ Common::String OSystem_Win32::getDefaultConfigFileName() {
 				error("Unable to access user profile directory");
 
 			strcat(configFile, "\\Application Data");
-			CreateDirectory(configFile, NULL);
+
+			// If the directory already exists (as it should in most cases),
+			// we don't want to fail, but we need to stop on other errors (such as ERROR_PATH_NOT_FOUND)
+			if (!CreateDirectory(configFile, NULL)) {
+				if (GetLastError() != ERROR_ALREADY_EXISTS)
+					error("Cannot create Application data folder");
+			}
 		}
 
 		strcat(configFile, "\\ScummVM");
-		CreateDirectory(configFile, NULL);
+		if (!CreateDirectory(configFile, NULL)) {
+			if (GetLastError() != ERROR_ALREADY_EXISTS)
+				error("Cannot create ScummVM application data folder");
+		}
+
 		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
 
 		FILE *tmp = NULL;
 		if ((tmp = fopen(configFile, "r")) == NULL) {
 			// Check windows directory
 			char oldConfigFile[MAXPATHLEN];
-			GetWindowsDirectory(oldConfigFile, MAXPATHLEN);
+			uint ret = GetWindowsDirectory(oldConfigFile, MAXPATHLEN);
+			if (ret == 0 || ret > MAXPATHLEN)
+				error("Cannot retrieve the path of the Windows directory");
+
 			strcat(oldConfigFile, "\\" DEFAULT_CONFIG_FILE);
 			if ((tmp = fopen(oldConfigFile, "r"))) {
 				strcpy(configFile, oldConfigFile);
@@ -178,7 +191,10 @@ Common::String OSystem_Win32::getDefaultConfigFileName() {
 		}
 	} else {
 		// Check windows directory
-		GetWindowsDirectory(configFile, MAXPATHLEN);
+		uint ret = GetWindowsDirectory(configFile, MAXPATHLEN);
+		if (ret == 0 || ret > MAXPATHLEN)
+			error("Cannot retrieve the path of the Windows directory");
+
 		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
 	}