ClientFile: move client_allow_file() into the Client class

Makefile.am

@@ -118,7 +118,7 @@ src_mpd_SOURCES = \
 	src/client/ClientWrite.cxx \
 	src/client/ClientMessage.cxx src/client/ClientMessage.hxx \
 	src/client/ClientSubscribe.cxx \
-	src/client/ClientFile.cxx src/client/ClientFile.hxx \
+	src/client/ClientFile.cxx \
 	src/Listen.cxx src/Listen.hxx \
 	src/LogInit.cxx src/LogInit.hxx \
 	src/LogBackend.cxx src/LogBackend.hxx \

src/client/Client.hxx

@@ -36,6 +36,7 @@
 
 struct sockaddr;
 class EventLoop;
+class Path;
 struct Partition;
 
 class Client final : private FullyBufferedSocket, TimeoutMonitor {
@@ -156,6 +157,18 @@ public:
 	void UnsubscribeAll();
 	bool PushMessage(const ClientMessage &msg);
 
+	/**
+	 * Is this client allowed to use the specified local file?
+	 *
+	 * Note that this function is vulnerable to timing/symlink attacks.
+	 * We cannot fix this as long as there are plugins that open a file by
+	 * its name, and not by file descriptor / callbacks.
+	 *
+	 * @param path_fs the absolute path name in filesystem encoding
+	 * @return true if access is allowed
+	 */
+	bool AllowFile(Path path_fs, Error &error) const;
+
 private:
 	/* virtual methods from class BufferedSocket */
 	virtual InputResult OnSocketInput(void *data, size_t length) override;

src/client/ClientFile.cxx

@@ -18,7 +18,6 @@
  */
 
 #include "config.h"
-#include "ClientFile.hxx"
 #include "Client.hxx"
 #include "protocol/Ack.hxx"
 #include "fs/Path.hxx"
@@ -29,16 +28,14 @@
 #include <unistd.h>
 
 bool
-client_allow_file(const Client &client, Path path_fs, Error &error)
+Client::AllowFile(Path path_fs, Error &error) const
 {
 #ifdef WIN32
-	(void)client;
 	(void)path_fs;
 
 	error.Set(ack_domain, ACK_ERROR_PERMISSION, "Access denied");
 	return false;
 #else
-	const int uid = client.GetUID();
 	if (uid >= 0 && (uid_t)uid == geteuid())
 		/* always allow access if user runs his own MPD
 		   instance */

src/client/ClientFile.hxx

-/*
- * Copyright (C) 2003-2014 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifndef MPD_CLIENT_FILE_HXX
-#define MPD_CLIENT_FILE_HXX
-
-class Client;
-class Path;
-class Error;
-
-/**
- * Is this client allowed to use the specified local file?
- *
- * Note that this function is vulnerable to timing/symlink attacks.
- * We cannot fix this as long as there are plugins that open a file by
- * its name, and not by file descriptor / callbacks.
- *
- * @param path_fs the absolute path name in filesystem encoding
- * @return true if access is allowed
- */
-bool
-client_allow_file(const Client &client, Path path_fs, Error &error);
-
-#endif

src/command/FileCommands.cxx

@@ -22,7 +22,6 @@
 #include "CommandError.hxx"
 #include "protocol/Ack.hxx"
 #include "protocol/Result.hxx"
-#include "client/ClientFile.hxx"
 #include "client/Client.hxx"
 #include "util/CharUtil.hxx"
 #include "util/UriUtil.hxx"
@@ -122,7 +121,7 @@ handle_read_comments(Client &client, gcc_unused int argc, char *argv[])
 		}
 
 		Error error;
-		if (!client_allow_file(client, path_fs, error))
+		if (!client.AllowFile(path_fs, error))
 			return print_error(client, error);
 	} else if (uri_has_scheme(uri)) {
 		return read_stream_comments(client, uri);

src/command/OtherCommands.cxx

@@ -41,7 +41,6 @@
 #include "Permission.hxx"
 #include "PlaylistFile.hxx"
 #include "db/PlaylistVector.hxx"
-#include "client/ClientFile.hxx"
 #include "client/Client.hxx"
 #include "Partition.hxx"
 #include "Instance.hxx"
@@ -143,7 +142,7 @@ handle_lsinfo(Client &client, int argc, char *argv[])
 		}
 
 		Error error;
-		if (!client_allow_file(client, path_fs, error))
+		if (!client.AllowFile(path_fs, error))
 			return print_error(client, error);
 
 		DetachedSong song(path_utf8);

src/command/QueueCommands.cxx

@@ -25,7 +25,6 @@
 #include "db/Selection.hxx"
 #include "Playlist.hxx"
 #include "PlaylistPrint.hxx"
-#include "client/ClientFile.hxx"
 #include "client/Client.hxx"
 #include "Partition.hxx"
 #include "protocol/ArgParser.hxx"
@@ -56,7 +55,7 @@ handle_add(Client &client, gcc_unused int argc, char *argv[])
 		}
 
 		Error error;
-		if (!client_allow_file(client, path_fs, error))
+		if (!client.AllowFile(path_fs, error))
 			return print_error(client, error);
 
 		result = client.partition.AppendFile(path_utf8);
@@ -104,7 +103,7 @@ handle_addid(Client &client, int argc, char *argv[])
 		}
 
 		Error error;
-		if (!client_allow_file(client, path_fs, error))
+		if (!client.AllowFile(path_fs, error))
 			return print_error(client, error);
 
 		result = client.partition.AppendFile(path_utf8, &added_id);