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-rw-r--r--src/update.c571
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diff --git a/src/update.c b/src/update.c
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+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * Copyright (C) 2008 Max Kellermann <max@duempel.org>
+ * 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 "update.h"
+#include "log.h"
+#include "ls.h"
+#include "path.h"
+#include "playlist.h"
+#include "utils.h"
+#include "main_notify.h"
+#include "dirvec.h"
+#include "condition.h"
+#include "update.h"
+
+enum update_progress {
+ UPDATE_PROGRESS_IDLE = 0,
+ UPDATE_PROGRESS_RUNNING = 1,
+ UPDATE_PROGRESS_DONE = 2
+} progress;
+
+/* make this dynamic?, or maybe this is big enough... */
+static char *update_paths[32];
+static size_t update_paths_nr;
+
+static pthread_t update_thr;
+
+static const int update_task_id_max = 1 << 15;
+
+static int update_task_id;
+
+static Song *delete;
+
+static struct condition delete_cond;
+
+int isUpdatingDB(void)
+{
+ return (progress != UPDATE_PROGRESS_IDLE) ? update_task_id : 0;
+}
+
+static void directory_set_stat(Directory * dir, const struct stat *st)
+{
+ dir->inode = st->st_ino;
+ dir->device = st->st_dev;
+ dir->stat = 1;
+}
+
+static void delete_song(Directory *dir, Song *del)
+{
+ /* first, prevent traversers in main task from getting this */
+ songvec_delete(&dir->songs, del);
+
+ /* now take it out of the playlist (in the main_task) */
+ cond_enter(&delete_cond);
+ assert(!delete);
+ delete = del;
+ wakeup_main_task();
+ do { cond_wait(&delete_cond); } while (delete);
+ cond_leave(&delete_cond);
+
+ /* finally, all possible references gone, free it */
+ freeJustSong(del);
+}
+
+struct delete_data {
+ char *tmp;
+ Directory *dir;
+ enum update_return ret;
+};
+
+/* passed to songvec_for_each */
+static int delete_song_if_removed(Song *song, void *_data)
+{
+ struct delete_data *data = _data;
+
+ data->tmp = get_song_url(data->tmp, song);
+ assert(data->tmp);
+
+ if (!isFile(data->tmp, NULL)) {
+ delete_song(data->dir, song);
+ data->ret = UPDATE_RETURN_UPDATED;
+ }
+ return 0;
+}
+
+static enum update_return
+removeDeletedFromDirectory(char *path_max_tmp, Directory * directory)
+{
+ enum update_return ret = UPDATE_RETURN_NOUPDATE;
+ int i;
+ struct dirvec *dv = &directory->children;
+ struct delete_data data;
+
+ for (i = dv->nr; --i >= 0; ) {
+ if (isDir(dv->base[i]->path))
+ continue;
+ LOG("removing directory: %s\n", dv->base[i]->path);
+ dirvec_delete(dv, dv->base[i]);
+ ret = UPDATE_RETURN_UPDATED;
+ }
+
+ data.dir = directory;
+ data.tmp = path_max_tmp;
+ data.ret = ret;
+ songvec_for_each(&directory->songs, delete_song_if_removed, &data);
+
+ return data.ret;
+}
+
+static const char *opendir_path(char *path_max_tmp, const char *dirname)
+{
+ if (*dirname != '\0')
+ return rmp2amp_r(path_max_tmp,
+ utf8_to_fs_charset(path_max_tmp, dirname));
+ return musicDir;
+}
+
+static int statDirectory(Directory * dir)
+{
+ struct stat st;
+
+ if (myStat(getDirectoryPath(dir), &st) < 0)
+ return -1;
+
+ directory_set_stat(dir, &st);
+
+ return 0;
+}
+
+static int inodeFoundInParent(Directory * parent, ino_t inode, dev_t device)
+{
+ while (parent) {
+ if (!parent->stat && statDirectory(parent) < 0)
+ return -1;
+ if (parent->inode == inode && parent->device == device) {
+ DEBUG("recursive directory found\n");
+ return 1;
+ }
+ parent = parent->parent;
+ }
+
+ return 0;
+}
+
+static enum update_return
+addSubDirectoryToDirectory(Directory * directory,
+ const char *name, struct stat *st)
+{
+ Directory *subDirectory;
+
+ if (inodeFoundInParent(directory, st->st_ino, st->st_dev))
+ return UPDATE_RETURN_NOUPDATE;
+
+ subDirectory = newDirectory(name, directory);
+ directory_set_stat(subDirectory, st);
+
+ if (exploreDirectory(subDirectory) != UPDATE_RETURN_UPDATED) {
+ freeDirectory(subDirectory);
+ return UPDATE_RETURN_NOUPDATE;
+ }
+
+ dirvec_add(&directory->children, subDirectory);
+
+ return UPDATE_RETURN_UPDATED;
+}
+
+static enum update_return
+addToDirectory(Directory * directory, const char *name)
+{
+ struct stat st;
+
+ if (myStat(name, &st)) {
+ DEBUG("failed to stat %s: %s\n", name, strerror(errno));
+ return UPDATE_RETURN_ERROR;
+ }
+
+ if (S_ISREG(st.st_mode) &&
+ hasMusicSuffix(name, 0) && isMusic(name, NULL, 0)) {
+ Song *song;
+ const char *shortname = mpd_basename(name);
+
+ if (!(song = newSong(shortname, directory)))
+ return -1;
+ songvec_add(&directory->songs, song);
+ LOG("added %s\n", name);
+ return UPDATE_RETURN_UPDATED;
+ } else if (S_ISDIR(st.st_mode)) {
+ return addSubDirectoryToDirectory(directory, name, &st);
+ }
+
+ DEBUG("addToDirectory: %s is not a directory or music\n", name);
+
+ return UPDATE_RETURN_ERROR;
+}
+
+static enum update_return updateDirectory(Directory * directory);
+
+static enum update_return
+updateInDirectory(Directory * directory, const char *name)
+{
+ Song *song;
+ struct stat st;
+
+ if (myStat(name, &st))
+ return UPDATE_RETURN_ERROR;
+
+ if (S_ISREG(st.st_mode) && hasMusicSuffix(name, 0)) {
+ const char *shortname = mpd_basename(name);
+
+ if (!(song = songvec_find(&directory->songs, shortname))) {
+ addToDirectory(directory, name);
+ return UPDATE_RETURN_UPDATED;
+ } else if (st.st_mtime != song->mtime) {
+ LOG("updating %s\n", name);
+ if (updateSongInfo(song) < 0)
+ delete_song(directory, song);
+ return UPDATE_RETURN_UPDATED;
+ }
+ } else if (S_ISDIR(st.st_mode)) {
+ Directory *subdir = dirvec_find(&directory->children, name);
+ if (subdir) {
+ assert(directory == subdir->parent);
+ directory_set_stat(subdir, &st);
+ return updateDirectory(subdir);
+ } else {
+ return addSubDirectoryToDirectory(directory, name, &st);
+ }
+ }
+
+ return UPDATE_RETURN_NOUPDATE;
+}
+
+/* we don't look at hidden files nor files with newlines in them */
+static int skip_path(const char *path)
+{
+ return (path[0] == '.' || strchr(path, '\n')) ? 1 : 0;
+}
+
+enum update_return
+exploreDirectory(Directory * directory)
+{
+ DIR *dir;
+ const char *dirname = getDirectoryPath(directory);
+ struct dirent *ent;
+ char path_max_tmp[MPD_PATH_MAX];
+ enum update_return ret = UPDATE_RETURN_NOUPDATE;
+
+ DEBUG("explore: attempting to opendir: %s\n", dirname);
+
+ dir = opendir(opendir_path(path_max_tmp, dirname));
+ if (!dir)
+ return UPDATE_RETURN_ERROR;
+
+ DEBUG("explore: %s\n", dirname);
+
+ while ((ent = readdir(dir))) {
+ char *utf8;
+ if (skip_path(ent->d_name))
+ continue;
+
+ utf8 = fs_charset_to_utf8(path_max_tmp, ent->d_name);
+ if (!utf8)
+ continue;
+
+ DEBUG("explore: found: %s (%s)\n", ent->d_name, utf8);
+
+ if (directory->path)
+ utf8 = pfx_dir(path_max_tmp, utf8, strlen(utf8),
+ dirname, strlen(dirname));
+ if (addToDirectory(directory, path_max_tmp) ==
+ UPDATE_RETURN_UPDATED)
+ ret = UPDATE_RETURN_UPDATED;
+ }
+
+ closedir(dir);
+
+ return ret;
+}
+
+static enum update_return updateDirectory(Directory * directory)
+{
+ DIR *dir;
+ const char *dirname = getDirectoryPath(directory);
+ struct dirent *ent;
+ char path_max_tmp[MPD_PATH_MAX];
+ enum update_return ret = UPDATE_RETURN_NOUPDATE;
+
+ if (!directory->stat && statDirectory(directory) < 0)
+ return UPDATE_RETURN_ERROR;
+ else if (inodeFoundInParent(directory->parent,
+ directory->inode,
+ directory->device))
+ return UPDATE_RETURN_ERROR;
+
+ dir = opendir(opendir_path(path_max_tmp, dirname));
+ if (!dir)
+ return UPDATE_RETURN_ERROR;
+
+ if (removeDeletedFromDirectory(path_max_tmp, directory) > 0)
+ ret = UPDATE_RETURN_UPDATED;
+
+ while ((ent = readdir(dir))) {
+ char *utf8;
+ if (skip_path(ent->d_name))
+ continue;
+
+ utf8 = fs_charset_to_utf8(path_max_tmp, ent->d_name);
+ if (!utf8)
+ continue;
+
+ if (directory->path)
+ utf8 = pfx_dir(path_max_tmp, utf8, strlen(utf8),
+ dirname, strlen(dirname));
+ if (updateInDirectory(directory, path_max_tmp) > 0)
+ ret = UPDATE_RETURN_UPDATED;
+ }
+
+ closedir(dir);
+
+ return ret;
+}
+
+static Directory *addDirectoryPathToDB(const char *utf8path)
+{
+ char path_max_tmp[MPD_PATH_MAX];
+ char *parent;
+ Directory *parentDirectory;
+ Directory *directory;
+ Song *conflicting;
+
+ parent = parent_path(path_max_tmp, utf8path);
+
+ if (strlen(parent) == 0)
+ parentDirectory = directory_get_root();
+ else
+ parentDirectory = addDirectoryPathToDB(parent);
+
+ if (!parentDirectory)
+ return NULL;
+
+ if ((directory = dirvec_find(&parentDirectory->children, utf8path))) {
+ assert(parentDirectory == directory->parent);
+ } else {
+ struct stat st;
+ if (myStat(utf8path, &st) < 0 ||
+ inodeFoundInParent(parentDirectory, st.st_ino, st.st_dev))
+ return NULL;
+ else {
+ directory = newDirectory(utf8path, parentDirectory);
+ dirvec_add(&parentDirectory->children, directory);
+ }
+ }
+
+ /* if we're adding directory paths, make sure to delete filenames
+ with potentially the same name */
+ conflicting = songvec_find(&parentDirectory->songs,
+ mpd_basename(directory->path));
+ if (conflicting)
+ delete_song(parentDirectory, conflicting);
+
+ return directory;
+}
+
+static Directory *addParentPathToDB(const char *utf8path)
+{
+ char *parent;
+ char path_max_tmp[MPD_PATH_MAX];
+ Directory *parentDirectory;
+
+ parent = parent_path(path_max_tmp, utf8path);
+
+ if (strlen(parent) == 0)
+ parentDirectory = directory_get_root();
+ else
+ parentDirectory = addDirectoryPathToDB(parent);
+
+ if (!parentDirectory)
+ return NULL;
+
+ return (Directory *) parentDirectory;
+}
+
+static enum update_return updatePath(const char *utf8path)
+{
+ Directory *directory;
+ Directory *parentDirectory;
+ Song *song;
+ char *path = sanitizePathDup(utf8path);
+ time_t mtime;
+ enum update_return ret = UPDATE_RETURN_NOUPDATE;
+ char path_max_tmp[MPD_PATH_MAX];
+
+ if (NULL == path)
+ return UPDATE_RETURN_ERROR;
+
+ /* if path is in the DB try to update it, or else delete it */
+ if ((directory = getDirectory(path))) {
+ parentDirectory = directory->parent;
+
+ /* if this update directory is successfull, we are done */
+ ret = updateDirectory(directory);
+ if (ret != UPDATE_RETURN_ERROR) {
+ free(path);
+ sortDirectory(directory);
+ return ret;
+ }
+ /* we don't want to delete the root directory */
+ else if (directory == directory_get_root()) {
+ free(path);
+ return UPDATE_RETURN_NOUPDATE;
+ }
+ /* if updateDirectory fails, means we should delete it */
+ else {
+ LOG("removing directory: %s\n", path);
+ dirvec_delete(&parentDirectory->children, directory);
+ ret = UPDATE_RETURN_UPDATED;
+ /* don't return, path maybe a song now */
+ }
+ } else if ((song = getSongFromDB(path))) {
+ parentDirectory = song->parentDir;
+ if (!parentDirectory->stat
+ && statDirectory(parentDirectory) < 0) {
+ free(path);
+ return UPDATE_RETURN_NOUPDATE;
+ }
+ /* if this song update is successful, we are done */
+ else if (!inodeFoundInParent(parentDirectory->parent,
+ parentDirectory->inode,
+ parentDirectory->device) &&
+ isMusic(get_song_url(path_max_tmp, song), &mtime, 0)) {
+ free(path);
+ if (song->mtime == mtime)
+ return UPDATE_RETURN_NOUPDATE;
+ else if (updateSongInfo(song) == 0)
+ return UPDATE_RETURN_UPDATED;
+ else {
+ delete_song(parentDirectory, song);
+ return UPDATE_RETURN_UPDATED;
+ }
+ }
+ /* if updateDirectory fails, means we should delete it */
+ else {
+ delete_song(parentDirectory, song);
+ ret = UPDATE_RETURN_UPDATED;
+ /* don't return, path maybe a directory now */
+ }
+ }
+
+ /* path not found in the db, see if it actually exists on the fs.
+ * Also, if by chance a directory was replaced by a file of the same
+ * name or vice versa, we need to add it to the db
+ */
+ if (isDir(path) || isMusic(path, NULL, 0)) {
+ parentDirectory = addParentPathToDB(path);
+ if (!parentDirectory || (!parentDirectory->stat &&
+ statDirectory(parentDirectory) < 0)) {
+ } else if (0 == inodeFoundInParent(parentDirectory->parent,
+ parentDirectory->inode,
+ parentDirectory->device)
+ && addToDirectory(parentDirectory, path)
+ == UPDATE_RETURN_UPDATED) {
+ ret = UPDATE_RETURN_UPDATED;
+ }
+ }
+
+ free(path);
+
+ return ret;
+}
+
+static void * update_task(void *_path)
+{
+ enum update_return ret = UPDATE_RETURN_NOUPDATE;
+
+ if (_path) {
+ ret = updatePath((char *)_path);
+ free(_path);
+ } else {
+ ret = updateDirectory(directory_get_root());
+ }
+
+ if (ret == UPDATE_RETURN_UPDATED && writeDirectoryDB() < 0)
+ ret = UPDATE_RETURN_ERROR;
+ progress = UPDATE_PROGRESS_DONE;
+ wakeup_main_task();
+ return (void *)ret;
+}
+
+static void spawn_update_task(char *path)
+{
+ pthread_attr_t attr;
+
+ assert(pthread_equal(pthread_self(), main_task));
+
+ progress = UPDATE_PROGRESS_RUNNING;
+ pthread_attr_init(&attr);
+ if (pthread_create(&update_thr, &attr, update_task, path))
+ FATAL("Failed to spawn update task: %s\n", strerror(errno));
+ if (++update_task_id > update_task_id_max)
+ update_task_id = 1;
+ DEBUG("spawned thread for update job id %i\n", update_task_id);
+}
+
+int directory_update_init(char *path)
+{
+ assert(pthread_equal(pthread_self(), main_task));
+
+ if (progress != UPDATE_PROGRESS_IDLE) {
+ int next_task_id;
+
+ if (!path)
+ return -1;
+ if (update_paths_nr == ARRAY_SIZE(update_paths))
+ return -1;
+ assert(update_paths_nr < ARRAY_SIZE(update_paths));
+ update_paths[update_paths_nr++] = path;
+ next_task_id = update_task_id + update_paths_nr;
+
+ return next_task_id > update_task_id_max ? 1 : next_task_id;
+ }
+ spawn_update_task(path);
+ return update_task_id;
+}
+
+void reap_update_task(void)
+{
+ enum update_return ret;
+
+ assert(pthread_equal(pthread_self(), main_task));
+
+ cond_enter(&delete_cond);
+ if (delete) {
+ char tmp[MPD_PATH_MAX];
+ LOG("removing: %s\n", get_song_url(tmp, delete));
+ deleteASongFromPlaylist(delete);
+ delete = NULL;
+ cond_signal_async(&delete_cond);
+ }
+ cond_leave(&delete_cond);
+
+ if (progress != UPDATE_PROGRESS_DONE)
+ return;
+ if (pthread_join(update_thr, (void **)&ret))
+ FATAL("error joining update thread: %s\n", strerror(errno));
+ if (ret == UPDATE_RETURN_UPDATED)
+ playlistVersionChange();
+
+ if (update_paths_nr) {
+ char *path = update_paths[0];
+ memmove(&update_paths[0], &update_paths[1],
+ --update_paths_nr * sizeof(char *));
+ spawn_update_task(path);
+ } else {
+ progress = UPDATE_PROGRESS_IDLE;
+ }
+}