diff options
Diffstat (limited to 'src/update_walk.c')
| -rw-r--r-- | src/update_walk.c | 759 |
1 files changed, 759 insertions, 0 deletions
diff --git a/src/update_walk.c b/src/update_walk.c new file mode 100644 index 000000000..b79e95ae0 --- /dev/null +++ b/src/update_walk.c @@ -0,0 +1,759 @@ +/* + * 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 "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_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); + if (song == NULL) + return true; + + // shouldn't be necessary but it's there.. + song->mtime = st->st_mtime; + + song->tag = plugin->tag_dup(map_directory_child_fs(contdir, vtrack)); + + songvec_add(&contdir->songs, song); + song = NULL; + + modified = true; + + 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) + 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)) + 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] == '.' && 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 (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; + + 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; + } + + g_free(path_fs); + + removeDeletedFromDirectory(directory); + + while ((ent = readdir(dir))) { + char *utf8; + struct stat st2; + + if (skip_path(ent->d_name)) + continue; + + utf8 = fs_charset_to_utf8(ent->d_name); + if (utf8 == NULL || skip_symlink(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); + } + + 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; +} |