From b6b8fb7d73173049d9b227eb4991d437cb129a37 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Mon, 15 Aug 2016 22:19:55 +0200
Subject: [PATCH] PlaylistFile: use TruncateFile()

As a side effect, "playlistclear" no longer creates a new playlist if
the given one doesn't yet exist.
---
 src/PlaylistFile.cxx | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/PlaylistFile.cxx b/src/PlaylistFile.cxx
index dbd1a22c5..0afebba32 100644
--- a/src/PlaylistFile.cxx
+++ b/src/PlaylistFile.cxx
@@ -302,11 +302,15 @@ spl_clear(const char *utf8path)
 	const auto path_fs = spl_map_to_fs(utf8path);
 	assert(!path_fs.IsNull());
 
-	FILE *file = FOpen(path_fs, FOpenMode::WriteText);
-	if (file == nullptr)
-		ThrowPlaylistErrno();
-
-	fclose(file);
+	try {
+		TruncateFile(path_fs);
+	} catch (const std::system_error &e) {
+		if (IsFileNotFound(e))
+			throw PlaylistError(PlaylistResult::NO_SUCH_LIST,
+					    "No such playlist");
+		else
+			throw;
+	}
 
 	idle_add(IDLE_STORED_PLAYLIST);
 }