/* the Music Player Daemon (MPD) * Copyright (C) 2007 by Warren Dukes (warren.dukes@gmail.com) * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "stored_playlist.h" #include "playlist_save.h" #include "song.h" #include "mapper.h" #include "path.h" #include "uri.h" #include "database.h" #include "idle.h" #include "conf.h" #include <assert.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <dirent.h> #include <string.h> #include <errno.h> static unsigned playlist_max_length; bool playlist_saveAbsolutePaths = DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS; void spl_global_init(void) { playlist_max_length = config_get_positive(CONF_MAX_PLAYLIST_LENGTH, DEFAULT_PLAYLIST_MAX_LENGTH); playlist_saveAbsolutePaths = config_get_bool(CONF_SAVE_ABSOLUTE_PATHS, DEFAULT_PLAYLIST_SAVE_ABSOLUTE_PATHS); } bool spl_valid_name(const char *name_utf8) { /* * Not supporting '/' was done out of laziness, and we should * really strive to support it in the future. * * Not supporting '\r' and '\n' is done out of protocol * limitations (and arguably laziness), but bending over head * over heels to modify the protocol (and compatibility with * all clients) to support idiots who put '\r' and '\n' in * filenames isn't going to happen, either. */ return strchr(name_utf8, '/') == NULL && strchr(name_utf8, '\n') == NULL && strchr(name_utf8, '\r') == NULL; } static struct stored_playlist_info * load_playlist_info(const char *parent_path_fs, const char *name_fs) { size_t name_length = strlen(name_fs); char *path_fs, *name, *name_utf8; int ret; struct stat st; struct stored_playlist_info *playlist; if (name_length < sizeof(PLAYLIST_FILE_SUFFIX) || memchr(name_fs, '\n', name_length) != NULL) return NULL; if (!g_str_has_suffix(name_fs, PLAYLIST_FILE_SUFFIX)) return NULL; path_fs = g_build_filename(parent_path_fs, name_fs, NULL); ret = stat(path_fs, &st); g_free(path_fs); if (ret < 0 || !S_ISREG(st.st_mode)) return NULL; name = g_strndup(name_fs, name_length + 1 - sizeof(PLAYLIST_FILE_SUFFIX)); name_utf8 = fs_charset_to_utf8(name); g_free(name); if (name_utf8 == NULL) return NULL; playlist = g_new(struct stored_playlist_info, 1); playlist->name = name_utf8; playlist->mtime = st.st_mtime; return playlist; } GPtrArray * spl_list(void) { const char *parent_path_fs = map_spl_path(); DIR *dir; struct dirent *ent; GPtrArray *list; struct stored_playlist_info *playlist; if (parent_path_fs == NULL) return NULL; dir = opendir(parent_path_fs); if (dir == NULL) return NULL; list = g_ptr_array_new(); while ((ent = readdir(dir)) != NULL) { playlist = load_playlist_info(parent_path_fs, ent->d_name); if (playlist != NULL) g_ptr_array_add(list, playlist); } closedir(dir); return list; } void spl_list_free(GPtrArray *list) { for (unsigned i = 0; i < list->len; ++i) { struct stored_playlist_info *playlist = g_ptr_array_index(list, i); g_free(playlist->name); g_free(playlist); } g_ptr_array_free(list, true); } static enum playlist_result spl_save(GPtrArray *list, const char *utf8path) { FILE *file; char *path_fs; assert(utf8path != NULL); path_fs = map_spl_utf8_to_fs(utf8path); if (path_fs == NULL) return PLAYLIST_RESULT_DISABLED; while (!(file = fopen(path_fs, "w")) && errno == EINTR); g_free(path_fs); if (file == NULL) return PLAYLIST_RESULT_ERRNO; for (unsigned i = 0; i < list->len; ++i) { const char *uri = g_ptr_array_index(list, i); playlist_print_uri(file, uri); } while (fclose(file) != 0 && errno == EINTR); return PLAYLIST_RESULT_SUCCESS; } GPtrArray * spl_load(const char *utf8path) { FILE *file; GPtrArray *list; char buffer[MPD_PATH_MAX]; char *path_fs; if (!spl_valid_name(utf8path)) return NULL; path_fs = map_spl_utf8_to_fs(utf8path); if (path_fs == NULL) return NULL; while (!(file = fopen(path_fs, "r")) && errno == EINTR); g_free(path_fs); if (file == NULL) return NULL; list = g_ptr_array_new(); while (fgets(buffer, sizeof(buffer), file)) { char *s = buffer; if (*s == PLAYLIST_COMMENT) continue; g_strchomp(buffer); if (!uri_has_scheme(s)) { char *path_utf8; struct song *song; path_utf8 = map_fs_to_utf8(s); if (path_utf8 == NULL) continue; song = db_get_song(path_utf8); g_free(path_utf8); if (song == NULL) continue; s = song_get_uri(song); } else s = g_strdup(s); g_ptr_array_add(list, s); if (list->len >= playlist_max_length) break; } while (fclose(file) && errno == EINTR); return list; } void spl_free(GPtrArray *list) { for (unsigned i = 0; i < list->len; ++i) { char *uri = g_ptr_array_index(list, i); g_free(uri); } g_ptr_array_free(list, true); } static char * spl_remove_index_internal(GPtrArray *list, unsigned idx) { char *uri; assert(idx < list->len); uri = g_ptr_array_remove_index(list, idx); assert(uri != NULL); return uri; } static void spl_insert_index_internal(GPtrArray *list, unsigned idx, char *uri) { assert(idx <= list->len); g_ptr_array_add(list, uri); memmove(list->pdata + idx + 1, list->pdata + idx, (list->len - idx - 1) * sizeof(list->pdata[0])); g_ptr_array_index(list, idx) = uri; } enum playlist_result spl_move_index(const char *utf8path, unsigned src, unsigned dest) { GPtrArray *list; char *uri; enum playlist_result result; if (src == dest) /* this doesn't check whether the playlist exists, but what the hell.. */ return PLAYLIST_RESULT_SUCCESS; if (!(list = spl_load(utf8path))) return PLAYLIST_RESULT_NO_SUCH_LIST; if (src >= list->len || dest >= list->len) { spl_free(list); return PLAYLIST_RESULT_BAD_RANGE; } uri = spl_remove_index_internal(list, src); spl_insert_index_internal(list, dest, uri); result = spl_save(list, utf8path); spl_free(list); idle_add(IDLE_STORED_PLAYLIST); return result; } enum playlist_result spl_clear(const char *utf8path) { char *path_fs; FILE *file; if (!spl_valid_name(utf8path)) return PLAYLIST_RESULT_BAD_NAME; path_fs = map_spl_utf8_to_fs(utf8path); if (path_fs == NULL) return PLAYLIST_RESULT_DISABLED; while (!(file = fopen(path_fs, "w")) && errno == EINTR); g_free(path_fs); if (file == NULL) return PLAYLIST_RESULT_ERRNO; while (fclose(file) != 0 && errno == EINTR); idle_add(IDLE_STORED_PLAYLIST); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result spl_delete(const char *name_utf8) { char *path_fs; int ret; path_fs = map_spl_utf8_to_fs(name_utf8); if (path_fs == NULL) return PLAYLIST_RESULT_DISABLED; ret = unlink(path_fs); g_free(path_fs); if (ret < 0) return errno == ENOENT ? PLAYLIST_RESULT_NO_SUCH_LIST : PLAYLIST_RESULT_ERRNO; idle_add(IDLE_STORED_PLAYLIST); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result spl_remove_index(const char *utf8path, unsigned pos) { GPtrArray *list; char *uri; enum playlist_result result; if (!(list = spl_load(utf8path))) return PLAYLIST_RESULT_NO_SUCH_LIST; if (pos >= list->len) { spl_free(list); return PLAYLIST_RESULT_BAD_RANGE; } uri = spl_remove_index_internal(list, pos); g_free(uri); result = spl_save(list, utf8path); spl_free(list); idle_add(IDLE_STORED_PLAYLIST); return result; } enum playlist_result spl_append_song(const char *utf8path, struct song *song) { FILE *file; struct stat st; char *path_fs; if (!spl_valid_name(utf8path)) return PLAYLIST_RESULT_BAD_NAME; path_fs = map_spl_utf8_to_fs(utf8path); if (path_fs == NULL) return PLAYLIST_RESULT_DISABLED; while (!(file = fopen(path_fs, "a")) && errno == EINTR); g_free(path_fs); if (file == NULL) { int save_errno = errno; while (fclose(file) != 0 && errno == EINTR); errno = save_errno; return PLAYLIST_RESULT_ERRNO; } if (fstat(fileno(file), &st) < 0) { int save_errno = errno; while (fclose(file) != 0 && errno == EINTR); errno = save_errno; return PLAYLIST_RESULT_ERRNO; } if (st.st_size / (MPD_PATH_MAX + 1) >= (off_t)playlist_max_length) { while (fclose(file) != 0 && errno == EINTR); return PLAYLIST_RESULT_TOO_LARGE; } playlist_print_song(file, song); while (fclose(file) != 0 && errno == EINTR); idle_add(IDLE_STORED_PLAYLIST); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result spl_append_uri(const char *url, const char *utf8file) { struct song *song; if (uri_has_scheme(url)) { enum playlist_result ret; song = song_remote_new(url); ret = spl_append_song(utf8file, song); song_free(song); return ret; } else { song = db_get_song(url); if (song == NULL) return PLAYLIST_RESULT_NO_SUCH_SONG; return spl_append_song(utf8file, song); } } static enum playlist_result spl_rename_internal(const char *from_path_fs, const char *to_path_fs) { if (!g_file_test(from_path_fs, G_FILE_TEST_IS_REGULAR)) return PLAYLIST_RESULT_NO_SUCH_LIST; if (g_file_test(to_path_fs, G_FILE_TEST_EXISTS)) return PLAYLIST_RESULT_LIST_EXISTS; if (rename(from_path_fs, to_path_fs) < 0) return PLAYLIST_RESULT_ERRNO; idle_add(IDLE_STORED_PLAYLIST); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result spl_rename(const char *utf8from, const char *utf8to) { char *from_path_fs, *to_path_fs; static enum playlist_result ret; if (!spl_valid_name(utf8from) || !spl_valid_name(utf8to)) return PLAYLIST_RESULT_BAD_NAME; from_path_fs = map_spl_utf8_to_fs(utf8from); to_path_fs = map_spl_utf8_to_fs(utf8to); if (from_path_fs != NULL && to_path_fs != NULL) ret = spl_rename_internal(from_path_fs, to_path_fs); else ret = PLAYLIST_RESULT_DISABLED; g_free(from_path_fs); g_free(to_path_fs); return ret; }