fs/io/FileOutputStream: use C++ exceptions in Commit()

src/PlaylistFile.cxx

@@ -239,7 +239,11 @@ SavePlaylistFile(const PlaylistFileContents &contents, const char *utf8path,
 	for (const auto &uri_utf8 : contents)
 		playlist_print_uri(bos, uri_utf8.c_str());
 
-	return bos.Flush(error) && fos.Commit(error);
+	if (!bos.Flush(error))
+		return false;
+
+	fos.Commit();
+	return true;
 }
 
 PlaylistFileContents
@@ -411,9 +415,11 @@ spl_append_song(const char *utf8path, const DetachedSong &song, Error &error)
 
 	playlist_print_song(bos, song);
 
-	if (!bos.Flush(error) || !fos.Commit(error))
+	if (!bos.Flush(error))
 		return false;
 
+	fos.Commit();
+
 	idle_add(IDLE_STORED_PLAYLIST);
 	return true;
 }

src/PlaylistSave.cxx

@@ -86,9 +86,11 @@ spl_save_queue(const char *name_utf8, const Queue &queue, Error &error)
 	for (unsigned i = 0; i < queue.GetLength(); i++)
 		playlist_print_song(bos, queue.Get(i));
 
-	if (!bos.Flush(error) || !fos.Commit(error))
+	if (!bos.Flush(error))
 		return false;
 
+	fos.Commit();
+
 	idle_add(IDLE_STORED_PLAYLIST);
 	return true;
 }

src/StateFile.cxx

@@ -92,10 +92,12 @@ StateFile::Write()
 	try {
 		Error error;
 		FileOutputStream fos(path);
-		if (!Write(fos, error) || !fos.Commit(error)) {
+		if (!Write(fos, error)) {
 			LogError(error);
 			return;
 		}
+
+		fos.Commit();
 	} catch (const std::exception &e) {
 		LogError(e);
 	}

src/db/plugins/simple/SimpleDatabasePlugin.cxx

@@ -411,8 +411,7 @@ SimpleDatabase::Save(Error &error)
 	}
 #endif
 
-	if (!fos.Commit(error))
-		return false;
+	fos.Commit();
 
 	FileInfo fi;
 	if (GetFileInfo(path, fi))

src/fs/io/FileOutputStream.cxx

@@ -72,13 +72,12 @@ BaseFileOutputStream::Write(const void *data, size_t size, Error &error)
 	return true;
 }
 
-bool
-FileOutputStream::Commit(gcc_unused Error &error)
+void
+FileOutputStream::Commit()
 {
 	assert(IsDefined());
 
 	Close();
-	return true;
 }
 
 void
@@ -162,8 +161,8 @@ BaseFileOutputStream::Write(const void *data, size_t size, Error &error)
 	return true;
 }
 
-bool
-FileOutputStream::Commit(Error &error)
+void
+FileOutputStream::Commit()
 {
 	assert(IsDefined());
 
@@ -176,20 +175,20 @@ FileOutputStream::Commit(Error &error)
 		snprintf(fd_path, sizeof(fd_path), "/proc/self/fd/%d",
 			 GetFD().Get());
 		if (linkat(AT_FDCWD, fd_path, AT_FDCWD, GetPath().c_str(),
-			   AT_SYMLINK_FOLLOW) < 0) {
-			error.FormatErrno("Failed to commit %s",
+			   AT_SYMLINK_FOLLOW) < 0)
+			throw FormatErrno("Failed to commit %s",
 					  GetPath().c_str());
-			Close();
-			return false;
-		}
 	}
 #endif
 
-	bool success = Close();
-	if (!success)
-		error.FormatErrno("Failed to commit %s", GetPath().c_str());
-
-	return success;
+	if (!Close()) {
+#ifdef WIN32
+		throw FormatLastError("Failed to commit %s",
+				      GetPath().ToUTF8().c_str());
+#else
+		throw FormatErrno("Failed to commit %s", GetPath().c_str());
+#endif
+	}
 }
 
 void
@@ -233,18 +232,17 @@ AppendFileOutputStream::AppendFileOutputStream(Path _path)
 #endif
 }
 
-bool
-AppendFileOutputStream::Commit(gcc_unused Error &error)
+void
+AppendFileOutputStream::Commit()
 {
 	assert(IsDefined());
 
+	if (!Close()) {
 #ifdef WIN32
-	return Close();
+		throw FormatLastError("Failed to commit %s",
+				      GetPath().ToUTF8().c_str());
 #else
-	bool success = Close();
-	if (!success)
-		error.FormatErrno("Failed to commit %s", GetPath().c_str());
-
-	return success;
+		throw FormatErrno("Failed to commit %s", GetPath().c_str());
 #endif
+	}
 }

src/fs/io/FileOutputStream.hxx

@@ -139,7 +139,7 @@ public:
 			Cancel();
 	}
 
-	bool Commit(Error &error);
+	void Commit();
 	void Cancel();
 };
 
@@ -152,7 +152,7 @@ public:
 			Close();
 	}
 
-	bool Commit(Error &error);
+	void Commit();
 };
 
 #endif

src/output/plugins/RecorderOutputPlugin.cxx

@@ -244,8 +244,14 @@ RecorderOutput::Commit(Error &error)
 
 	encoder->Close();
 
-	if (success && !file->Commit(error))
-		success = false;
+	if (success) {
+		try {
+			file->Commit();
+		} catch (...) {
+			delete file;
+			throw;
+		}
+	}
 
 	delete file;
 
@@ -263,9 +269,13 @@ RecorderOutput::Close()
 		return;
 	}
 
-	Error error;
-	if (!Commit(error))
-		LogError(error);
+	try {
+		Error error;
+		if (!Commit(error))
+			LogError(error);
+	} catch (const std::exception &e) {
+		LogError(e);
+	}
 
 	if (HasDynamicPath()) {
 		assert(!path.IsNull());
@@ -281,9 +291,13 @@ RecorderOutput::FinishFormat()
 	if (file == nullptr)
 		return;
 
-	Error error;
-	if (!Commit(error))
-		LogError(error);
+	try {
+		Error error;
+		if (!Commit(error))
+			LogError(error);
+	} catch (const std::exception &e) {
+		LogError(e);
+	}
 
 	file = nullptr;
 	path.SetNull();

test/WriteFile.cxx

@@ -61,16 +61,12 @@ main(int argc, char **argv)
 	const Path path = Path::FromFS(argv[1]);
 
 	try {
-		Error error;
 		FileOutputStream fos(path);
 
 		if (!Copy(fos, STDIN_FILENO))
 			return EXIT_FAILURE;
 
-		if (!fos.Commit(error)) {
-			fprintf(stderr, "%s\n", error.GetMessage());
-			return EXIT_FAILURE;
-		}
+		fos.Commit();
 
 		return EXIT_SUCCESS;
 	} catch (const std::exception &e) {