/* * Copyright (C) 2003-2009 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 "update_internal.h" #include "database.h" #include "exclude.h" #include "directory.h" #include "song.h" #include "uri.h" #include "mapper.h" #include "path.h" #include "decoder_list.h" #include "decoder_plugin.h" #include "conf.h" #include <glib.h> #include <assert.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <dirent.h> #include <string.h> #include <stdlib.h> #include <errno.h> static bool walk_discard; static bool modified; #ifndef WIN32 enum { DEFAULT_FOLLOW_INSIDE_SYMLINKS = true, DEFAULT_FOLLOW_OUTSIDE_SYMLINKS = true, }; static bool follow_inside_symlinks; static bool follow_outside_symlinks; #endif void update_walk_global_init(void) { #ifndef WIN32 follow_inside_symlinks = config_get_bool(CONF_FOLLOW_INSIDE_SYMLINKS, DEFAULT_FOLLOW_INSIDE_SYMLINKS); follow_outside_symlinks = config_get_bool(CONF_FOLLOW_OUTSIDE_SYMLINKS, DEFAULT_FOLLOW_OUTSIDE_SYMLINKS); #endif } void update_walk_global_finish(void) { } static void directory_set_stat(struct directory *dir, const struct stat *st) { dir->inode = st->st_ino; dir->device = st->st_dev; dir->stat = 1; } static void delete_song(struct directory *dir, struct 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) */ update_remove_song(del); /* finally, all possible references gone, free it */ song_free(del); } static int delete_each_song(struct song *song, G_GNUC_UNUSED void *data) { struct directory *directory = data; assert(song->parent == directory); delete_song(directory, song); return 0; } static void delete_directory(struct directory *directory); /** * Recursively remove all sub directories and songs from a directory, * leaving an empty directory. */ static void clear_directory(struct directory *directory) { int i; for (i = directory->children.nr; --i >= 0;) delete_directory(directory->children.base[i]); assert(directory->children.nr == 0); songvec_for_each(&directory->songs, delete_each_song, directory); } /** * Recursively free a directory and all its contents. */ static void delete_directory(struct directory *directory) { assert(directory->parent != NULL); clear_directory(directory); dirvec_delete(&directory->parent->children, directory); directory_free(directory); } static void delete_name_in(struct directory *parent, const char *name) { struct directory *directory = directory_get_child(parent, name); struct song *song = songvec_find(&parent->songs, name); if (directory != NULL) { delete_directory(directory); modified = true; } if (song != NULL) { delete_song(parent, song); modified = true; } } /* passed to songvec_for_each */ static int delete_song_if_excluded(struct song *song, void *_data) { GSList *exclude_list = _data; char *name_fs; assert(song->parent != NULL); name_fs = utf8_to_fs_charset(song->uri); if (exclude_list_check(exclude_list, name_fs)) { delete_song(song->parent, song); modified = true; } g_free(name_fs); return 0; } static void remove_excluded_from_directory(struct directory *directory, GSList *exclude_list) { int i; struct dirvec *dv = &directory->children; for (i = dv->nr; --i >= 0; ) { struct directory *child = dv->base[i]; char *name_fs = utf8_to_fs_charset(directory_get_name(child)); if (exclude_list_check(exclude_list, name_fs)) { delete_directory(child); modified = true; } g_free(name_fs); } songvec_for_each(&directory->songs, delete_song_if_excluded, exclude_list); } /* passed to songvec_for_each */ static int delete_song_if_removed(struct song *song, void *_data) { struct directory *dir = _data; char *path; struct stat st; if ((path = map_song_fs(song)) == NULL || stat(path, &st) < 0 || !S_ISREG(st.st_mode)) { delete_song(dir, song); modified = true; } g_free(path); return 0; } static bool directory_exists(const struct directory *directory) { char *path_fs; GFileTest test; bool exists; path_fs = map_directory_fs(directory); if (path_fs == NULL) /* invalid path: cannot exist */ return false; test = directory->device == DEVICE_INARCHIVE || directory->device == DEVICE_CONTAINER ? G_FILE_TEST_IS_REGULAR : G_FILE_TEST_IS_DIR; exists = g_file_test(path_fs, test); g_free(path_fs); return exists; } static void removeDeletedFromDirectory(struct directory *directory) { int i; struct dirvec *dv = &directory->children; for (i = dv->nr; --i >= 0; ) { if (directory_exists(dv->base[i])) continue; g_debug("removing directory: %s", dv->base[i]->path); delete_directory(dv->base[i]); modified = true; } songvec_for_each(&directory->songs, delete_song_if_removed, directory); } static int stat_directory(const struct directory *directory, struct stat *st) { char *path_fs; int ret; path_fs = map_directory_fs(directory); if (path_fs == NULL) return -1; ret = stat(path_fs, st); g_free(path_fs); return ret; } static int stat_directory_child(const struct directory *parent, const char *name, struct stat *st) { char *path_fs; int ret; path_fs = map_directory_child_fs(parent, name); if (path_fs == NULL) return -1; ret = stat(path_fs, st); g_free(path_fs); return ret; } static int statDirectory(struct directory *dir) { struct stat st; if (stat_directory(dir, &st) < 0) return -1; directory_set_stat(dir, &st); return 0; } static int inodeFoundInParent(struct 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) { g_debug("recursive directory found"); return 1; } parent = parent->parent; } return 0; } static struct directory * make_subdir(struct directory *parent, const char *name) { struct directory *directory; directory = directory_get_child(parent, name); if (directory == NULL) { char *path; if (directory_is_root(parent)) path = NULL; else name = path = g_strconcat(directory_get_path(parent), "/", name, NULL); directory = directory_new_child(parent, name); g_free(path); } return directory; } #ifdef ENABLE_ARCHIVE static void update_archive_tree(struct directory *directory, char *name) { struct directory *subdir; struct song *song; char *tmp; tmp = strchr(name, '/'); if (tmp) { *tmp = 0; //add dir is not there already if ((subdir = dirvec_find(&directory->children, name)) == NULL) { //create new directory subdir = make_subdir(directory, name); subdir->device = DEVICE_INARCHIVE; } //create directories first update_archive_tree(subdir, tmp+1); } else { if (strlen(name) == 0) { g_warning("archive returned directory only"); return; } //add file song = songvec_find(&directory->songs, name); if (song == NULL) { song = song_file_load(name, directory); if (song != NULL) { songvec_add(&directory->songs, song); modified = true; g_message("added %s/%s", directory_get_path(directory), name); } } } } /** * Updates the file listing from an archive file. * * @param parent the parent directory the archive file resides in * @param name the UTF-8 encoded base name of the archive file * @param st stat() information on the archive file * @param plugin the archive plugin which fits this archive type */ static void update_archive_file(struct directory *parent, const char *name, const struct stat *st, const struct archive_plugin *plugin) { char *path_fs; struct archive_file *file; struct directory *directory; char *filepath; directory = dirvec_find(&parent->children, name); if (directory != NULL && directory->mtime == st->st_mtime && !walk_discard) /* MPD has already scanned the archive, and it hasn't changed since - don't consider updating it */ return; path_fs = map_directory_child_fs(parent, name); /* open archive */ file = plugin->open(path_fs); if (file == NULL) { g_warning("unable to open archive %s", path_fs); g_free(path_fs); return; } g_debug("archive %s opened", path_fs); g_free(path_fs); if (directory == NULL) { g_debug("creating archive directory: %s", name); directory = make_subdir(parent, name); /* mark this directory as archive (we use device for this) */ directory->device = DEVICE_INARCHIVE; } directory->mtime = st->st_mtime; plugin->scan_reset(file); while ((filepath = plugin->scan_next(file)) != NULL) { /* split name into directory and file */ g_debug("adding archive file: %s", filepath); update_archive_tree(directory, filepath); } plugin->close(file); } #endif static bool update_container_file( struct directory* directory, const char* name, const struct stat* st, const struct decoder_plugin* plugin) { char* vtrack = NULL; unsigned int tnum = 0; char* pathname = map_directory_child_fs(directory, name); struct directory* contdir = dirvec_find(&directory->children, name); // directory exists already if (contdir != NULL) { // modification time not eq. file mod. time if (contdir->mtime != st->st_mtime || walk_discard) { g_message("removing container file: %s", pathname); delete_directory(contdir); contdir = NULL; modified = true; } else { g_free(pathname); return true; } } contdir = make_subdir(directory, name); contdir->mtime = st->st_mtime; contdir->device = DEVICE_CONTAINER; while ((vtrack = plugin->container_scan(pathname, ++tnum)) != NULL) { struct song* song = song_file_new(vtrack, contdir); char *child_path_fs; // shouldn't be necessary but it's there.. song->mtime = st->st_mtime; child_path_fs = map_directory_child_fs(contdir, vtrack); song->tag = plugin->tag_dup(child_path_fs); g_free(child_path_fs); songvec_add(&contdir->songs, song); modified = true; g_message("added %s/%s", directory_get_path(directory), vtrack); g_free(vtrack); } g_free(pathname); if (tnum == 1) { delete_directory(contdir); return false; } else return true; } static void update_regular_file(struct directory *directory, const char *name, const struct stat *st) { const char *suffix = uri_get_suffix(name); const struct decoder_plugin* plugin; #ifdef ENABLE_ARCHIVE const struct archive_plugin *archive; #endif if (suffix == NULL) return; if ((plugin = decoder_plugin_from_suffix(suffix, false)) != NULL) { struct song* song = songvec_find(&directory->songs, name); if (!(song != NULL && st->st_mtime == song->mtime && !walk_discard) && plugin->container_scan != NULL) { if (update_container_file(directory, name, st, plugin)) { if (song != NULL) delete_song(directory, song); return; } } if (song == NULL) { song = song_file_load(name, directory); if (song == NULL) { g_debug("ignoring unrecognized file %s/%s", directory_get_path(directory), name); return; } songvec_add(&directory->songs, song); modified = true; g_message("added %s/%s", directory_get_path(directory), name); } else if (st->st_mtime != song->mtime || walk_discard) { g_message("updating %s/%s", directory_get_path(directory), name); if (!song_file_update(song)) { g_debug("deleting unrecognized file %s/%s", directory_get_path(directory), name); delete_song(directory, song); } modified = true; } #ifdef ENABLE_ARCHIVE } else if ((archive = archive_plugin_from_suffix(suffix))) { update_archive_file(directory, name, st, archive); #endif } } static bool updateDirectory(struct directory *directory, const struct stat *st); static void updateInDirectory(struct directory *directory, const char *name, const struct stat *st) { assert(strchr(name, '/') == NULL); if (S_ISREG(st->st_mode)) { update_regular_file(directory, name, st); } else if (S_ISDIR(st->st_mode)) { struct directory *subdir; bool ret; if (inodeFoundInParent(directory, st->st_ino, st->st_dev)) return; subdir = make_subdir(directory, name); assert(directory == subdir->parent); ret = updateDirectory(subdir, st); if (!ret) delete_directory(subdir); } else { g_debug("update: %s is not a directory, archive or music", name); } } /* we don't look at "." / ".." nor files with newlines in their name */ static bool skip_path(const char *path) { return (path[0] == '.' && path[1] == 0) || (path[0] == '.' && path[1] == '.' && path[2] == 0) || strchr(path, '\n') != NULL; } static bool skip_symlink(const struct directory *directory, const char *utf8_name) { #ifndef WIN32 char buffer[MPD_PATH_MAX]; char *path_fs; const char *p; ssize_t ret; path_fs = map_directory_child_fs(directory, utf8_name); if (path_fs == NULL) return true; ret = readlink(path_fs, buffer, sizeof(buffer)); g_free(path_fs); if (ret < 0) /* don't skip if this is not a symlink */ return errno != EINVAL; if (!follow_inside_symlinks && !follow_outside_symlinks) { /* ignore all symlinks */ return true; } else if (follow_inside_symlinks && follow_outside_symlinks) { /* consider all symlinks */ return false; } if (buffer[0] == '/') return !follow_outside_symlinks; p = buffer; while (*p == '.') { if (p[1] == '.' && G_IS_DIR_SEPARATOR(p[2])) { /* "../" moves to parent directory */ directory = directory->parent; if (directory == NULL) { /* we have moved outside the music directory - skip this symlink if such symlinks are not allowed */ return !follow_outside_symlinks; } p += 3; } else if (G_IS_DIR_SEPARATOR(p[1])) /* eliminate "./" */ p += 2; else break; } /* we are still in the music directory, so this symlink points to a song which is already in the database - skip according to the follow_inside_symlinks param*/ return !follow_inside_symlinks; #else /* no symlink checking on WIN32 */ (void)directory; (void)utf8_name; return false; #endif } static bool updateDirectory(struct directory *directory, const struct stat *st) { DIR *dir; struct dirent *ent; char *path_fs, *exclude_path_fs; GSList *exclude_list; assert(S_ISDIR(st->st_mode)); directory_set_stat(directory, st); path_fs = map_directory_fs(directory); if (path_fs == NULL) return false; dir = opendir(path_fs); if (!dir) { g_warning("Failed to open directory %s: %s", path_fs, g_strerror(errno)); g_free(path_fs); return false; } exclude_path_fs = g_build_filename(path_fs, ".mpdignore", NULL); exclude_list = exclude_list_load(exclude_path_fs); g_free(exclude_path_fs); g_free(path_fs); if (exclude_list != NULL) remove_excluded_from_directory(directory, exclude_list); removeDeletedFromDirectory(directory); while ((ent = readdir(dir))) { char *utf8; struct stat st2; if (skip_path(ent->d_name) || exclude_list_check(exclude_list, ent->d_name)) continue; utf8 = fs_charset_to_utf8(ent->d_name); if (utf8 == NULL) continue; if (skip_symlink(directory, utf8)) { delete_name_in(directory, utf8); g_free(utf8); continue; } if (stat_directory_child(directory, utf8, &st2) == 0) updateInDirectory(directory, utf8, &st2); else delete_name_in(directory, utf8); g_free(utf8); } exclude_list_free(exclude_list); closedir(dir); directory->mtime = st->st_mtime; return true; } static struct directory * directory_make_child_checked(struct directory *parent, const char *path) { struct directory *directory; char *base; struct stat st; struct song *conflicting; directory = directory_get_child(parent, path); if (directory != NULL) return directory; base = g_path_get_basename(path); if (stat_directory_child(parent, base, &st) < 0 || inodeFoundInParent(parent, st.st_ino, st.st_dev)) { g_free(base); return NULL; } /* if we're adding directory paths, make sure to delete filenames with potentially the same name */ conflicting = songvec_find(&parent->songs, base); if (conflicting) delete_song(parent, conflicting); g_free(base); directory = directory_new_child(parent, path); directory_set_stat(directory, &st); return directory; } static struct directory * addParentPathToDB(const char *utf8path) { struct directory *directory = db_get_root(); char *duplicated = g_strdup(utf8path); char *slash = duplicated; while ((slash = strchr(slash, '/')) != NULL) { *slash = 0; directory = directory_make_child_checked(directory, duplicated); if (directory == NULL || slash == NULL) break; *slash++ = '/'; } g_free(duplicated); return directory; } static void updatePath(const char *path) { struct directory *parent; char *name; struct stat st; parent = addParentPathToDB(path); if (parent == NULL) return; name = g_path_get_basename(path); if (stat_directory_child(parent, name, &st) == 0) updateInDirectory(parent, name, &st); else delete_name_in(parent, name); g_free(name); } bool update_walk(const char *path, bool discard) { walk_discard = discard; modified = false; if (path != NULL && !isRootDirectory(path)) { updatePath(path); } else { struct directory *directory = db_get_root(); struct stat st; if (stat_directory(directory, &st) == 0) updateDirectory(directory, &st); } return modified; }