diff options
Diffstat (limited to 'src/update.c')
| -rw-r--r-- | src/update.c | 571 |
1 files changed, 571 insertions, 0 deletions
diff --git a/src/update.c b/src/update.c new file mode 100644 index 000000000..790515f9a --- /dev/null +++ b/src/update.c @@ -0,0 +1,571 @@ +/* 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; + } +} |