/* * Copyright (C) 2003-2013 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. */ #include "config.h" #include "ClientFile.hxx" #include "Client.hxx" #include "ack.h" #include "io_error.h" #include #include #include #include bool client_allow_file(const Client *client, const char *path_fs, GError **error_r) { #ifdef WIN32 (void)client; (void)path_fs; g_set_error(error_r, ack_quark(), ACK_ERROR_PERMISSION, "Access denied"); return false; #else const int uid = client_get_uid(client); if (uid >= 0 && (uid_t)uid == geteuid()) /* always allow access if user runs his own MPD instance */ return true; if (uid <= 0) { /* unauthenticated client */ g_set_error(error_r, ack_quark(), ACK_ERROR_PERMISSION, "Access denied"); return false; } struct stat st; if (stat(path_fs, &st) < 0) { set_error_errno(error_r); return false; } if (st.st_uid != (uid_t)uid && (st.st_mode & 0444) != 0444) { /* client is not owner */ g_set_error(error_r, ack_quark(), ACK_ERROR_PERMISSION, "Access denied"); return false; } return true; #endif }