/* the Music Player Daemon (MPD) * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu) * 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 "directory.h" #include "ls.h" #include "command.h" #include "utils.h" #include "path.h" #include "log.h" #include "conf.h" #include "stats.h" #include "playlist.h" #include "listen.h" #include "interface.h" #include "volume.h" #include "mpd_types.h" #include "sig_handlers.h" #include "player.h" #include <string.h> #include <sys/types.h> #include <sys/time.h> #include <sys/resource.h> #include <sys/wait.h> #include <sys/stat.h> #include <dirent.h> #include <unistd.h> #include <stdio.h> #include <errno.h> #include <signal.h> #define DIRECTORY_DIR "directory: " #define DIRECTORY_MTIME "mtime: " #define DIRECTORY_BEGIN "begin: " #define DIRECTORY_END "end: " #define DIRECTORY_INFO_BEGIN "info_begin" #define DIRECTORY_INFO_END "info_end" #define DIRECTORY_MPD_VERSION "mpd_version: " #define DIRECTORY_FS_CHARSET "fs_charset: " #define DIRECTORY_SEARCH_ALBUM "album" #define DIRECTORY_SEARCH_ARTIST "artist" #define DIRECTORY_SEARCH_TITLE "title" #define DIRECTORY_SEARCH_FILENAME "filename" #define DIRECTORY_UPDATE_EXIT_NOUPDATE 0 #define DIRECTORY_UPDATE_EXIT_UPDATE 1 #define DIRECTORY_UPDATE_EXIT_ERROR 2 #define DIRECTORY_RETURN_NOUPDATE 0 #define DIRECTORY_RETURN_UPDATE 1 #define DIRECTORY_RETURN_ERROR -1 typedef List DirectoryList; typedef struct _Directory { char * utf8name; DirectoryList * subDirectories; SongList * songs; } Directory; Directory * mp3rootDirectory = NULL; char * directory_db; time_t directory_dbModTime = 0; volatile int directory_updatePid = 0; volatile int directory_reReadDB = 0; volatile mpd_uint16 directory_updateJobId = 0; DirectoryList * newDirectoryList(); int addToDirectory(Directory * directory, char * shortname, char * name); void freeDirectoryList(DirectoryList * list); void freeDirectory(Directory * directory); int exploreDirectory(Directory * directory); int updateDirectory(Directory * directory); void deleteEmptyDirectoriesInDirectory(Directory * directory); void removeSongFromDirectory(Directory * directory, char * shortname); int addSubDirectoryToDirectory(Directory * directory, char * shortname, char * name); Directory * getDirectoryDetails(char * name, char ** shortname, Directory ** parentDirectory); Directory * getDirectory(char * name); Song * getSongDetails(char * file, char ** shortnameRet, Directory ** directoryRet); int updatePath(char * utf8path); void sortDirectory(Directory * directory); void clearUpdatePid() { directory_updatePid = 0; } int isUpdatingDB() { if(directory_updatePid>0 || directory_reReadDB) { return directory_updateJobId; } return 0; } void directory_sigChldHandler(int pid, int status) { if(directory_updatePid==pid) { if(WIFSIGNALED(status) && WTERMSIG(status)!=SIGTERM) { ERROR("update process died from a " "non-TERM signal: %i\n", WTERMSIG(status)); } else if(!WIFSIGNALED(status)) { switch(WEXITSTATUS(status)) { case DIRECTORY_UPDATE_EXIT_UPDATE: directory_reReadDB = 1; DEBUG("direcotry_sigChldHandler: " "updated db\n"); case DIRECTORY_UPDATE_EXIT_NOUPDATE: DEBUG("direcotry_sigChldHandler: " "update exitted succesffully\n"); break; default: ERROR("error updating db\n"); } } clearUpdatePid(); } } void readDirectoryDBIfUpdateIsFinished() { if(directory_reReadDB && 0==directory_updatePid) { struct stat st; DEBUG("readDirectoryDB since update finished successfully\n"); readDirectoryDB(); incrPlaylistVersion(); directory_reReadDB = 0; if(stat(directory_db,&st)==0) { directory_dbModTime = st.st_mtime; } } } int updateInit(FILE * fp, List * pathList) { if(directory_updatePid > 0) { myfprintf(fp,"%s already updating\n",COMMAND_RESPOND_ERROR); return -1; } /* need to block CHLD signal, cause it can exit before we even get a chance to assign directory_updatePID */ blockSignals(); directory_updatePid = fork(); if(directory_updatePid==0) { /* child */ int dbUpdated = 0; clearPlayerPid(); unblockSignals(); finishSigHandlers(); close(listenSocket); freeAllInterfaces(); finishPlaylist(); finishVolume(); if(pathList) { ListNode * node = pathList->firstNode; while(node) { switch(updatePath(node->key)) { case 1: dbUpdated = 1; break; case 0: break; default: exit(DIRECTORY_UPDATE_EXIT_ERROR); } node = node->nextNode; } } else { if((dbUpdated = updateDirectory(mp3rootDirectory))<0) { exit(DIRECTORY_UPDATE_EXIT_ERROR); } } if(!dbUpdated) exit(DIRECTORY_UPDATE_EXIT_NOUPDATE); /* ignore signals since we don't want them to corrupt the db*/ ignoreSignals(); if(writeDirectoryDB()<0) { ERROR("problems writing music db file, \"%s\"\n", directory_db); exit(DIRECTORY_UPDATE_EXIT_ERROR); } exit(DIRECTORY_UPDATE_EXIT_UPDATE); } else if(directory_updatePid < 0) { unblockSignals(); ERROR("updateInit: Problems forking()'ing\n"); myfprintf(fp,"%s problems trying to update\n", COMMAND_RESPOND_ERROR); directory_updatePid = 0; return -1; } unblockSignals(); directory_updateJobId++; if(directory_updateJobId > 1<<15) directory_updateJobId = 1; DEBUG("updateInit: fork()'d update child for update job id %i\n", (int)directory_updateJobId); myfprintf(fp,"updating_db: %i\n",(int)directory_updateJobId); return 0; } Directory * newDirectory(char * dirname) { Directory * directory; directory = malloc(sizeof(Directory)); if(dirname!=NULL) directory->utf8name = strdup(dirname); else directory->utf8name = NULL; directory->subDirectories = newDirectoryList(); directory->songs = newSongList(); return directory; } void freeDirectory(Directory * directory) { freeDirectoryList(directory->subDirectories); freeSongList(directory->songs); if(directory->utf8name) free(directory->utf8name); free(directory); } DirectoryList * newDirectoryList() { return makeList((ListFreeDataFunc *)freeDirectory); } void freeDirectoryList(DirectoryList * directoryList) { freeList(directoryList); } void removeSongFromDirectory(Directory * directory, char * shortname) { void * song; if(findInList(directory->songs,shortname,&song)) { LOG("removing: %s\n",((Song *)song)->utf8file); deleteFromList(directory->songs,shortname); } } void deleteEmptyDirectoriesInDirectory(Directory * directory) { ListNode * node = directory->subDirectories->firstNode; ListNode * nextNode; Directory * subDir; while(node) { subDir = (Directory *)node->data; deleteEmptyDirectoriesInDirectory(subDir); nextNode = node->nextNode; if(subDir->subDirectories->numberOfNodes==0 && subDir->songs->numberOfNodes==0) { deleteNodeFromList(directory->subDirectories,node); } node = nextNode; } } /* return values: -1 -> error 0 -> no error, but nothing updated 1 -> no error, and stuff updated */ int updateInDirectory(Directory * directory, char * shortname, char * name) { time_t mtime; void * song; void * subDir; if(isMusic(name,&mtime)) { if(0==findInList(directory->songs,shortname,&song)) { addToDirectory(directory,shortname,name); return DIRECTORY_RETURN_UPDATE; } else if(mtime!=((Song *)song)->mtime) { LOG("updating %s\n",name); if(updateSongInfo((Song *)song)<0) { removeSongFromDirectory(directory,shortname); } return 1; } } else if(isDir(name)) { if(findInList(directory->subDirectories,shortname,(void **)&subDir)) { if(updateDirectory((Directory *)subDir)>0) return 1; } else { return addSubDirectoryToDirectory(directory,shortname, name); } } return 0; } /* return values: -1 -> error 0 -> no error, but nothing removed 1 -> no error, and stuff removed */ int removeDeletedFromDirectory(Directory * directory) { DIR * dir; char cwd[2]; struct dirent * ent; char * dirname = directory->utf8name; List * entList = makeList(free); void * name; char * s; char * utf8; ListNode * node; ListNode * tmpNode; int ret = 0; cwd[0] = '.'; cwd[1] = '\0'; if(dirname==NULL) dirname=cwd; if((dir = opendir(rmp2amp(utf8ToFsCharset(dirname))))==NULL) return -1; while((ent = readdir(dir))) { if(ent->d_name[0]=='.') continue; /* hide hidden stuff */ utf8 = fsCharsetToUtf8(ent->d_name); if(!utf8) continue; if(directory->utf8name) { s = malloc(strlen(directory->utf8name)+strlen(utf8)+2); sprintf(s,"%s/%s",directory->utf8name,utf8); } else s= strdup(utf8); insertInList(entList,utf8,s); } closedir(dir); node = directory->subDirectories->firstNode; while(node) { tmpNode = node->nextNode; if(findInList(entList,node->key,&name)) { if(!isDir((char *)name)) { LOG("removing directory: %s\n",(char*)name); deleteFromList(directory->subDirectories, node->key); ret = 1; } } else { LOG("removing directory: "); if(directory->utf8name) LOG("%s/",directory->utf8name); LOG("%s\n",node->key); deleteFromList(directory->subDirectories,node->key); ret = 1; } node = tmpNode; } node = directory->songs->firstNode; while(node) { tmpNode = node->nextNode; if(findInList(entList,node->key,(void **)&name)) { if(!isMusic(name,NULL)) { removeSongFromDirectory(directory,node->key); ret = 1; } } else { removeSongFromDirectory(directory,node->key); ret = 1; } node = tmpNode; } freeList(entList); return ret; } Directory * addDirectoryPathToDB(char * utf8path, char ** shortname) { char * parent; Directory * parentDirectory; void * directory; parent = strdup(parentPath(utf8path)); if(strlen(parent)==0) parentDirectory = (void *)mp3rootDirectory; else parentDirectory = addDirectoryPathToDB(parent,shortname); *shortname = utf8path+strlen(parent); while(*(*shortname) && *(*shortname)=='/') (*shortname)++; if(!findInList(parentDirectory->subDirectories,*shortname, &directory)) { directory = newDirectory(utf8path); insertInList(parentDirectory->subDirectories,*shortname, directory); } /* if we're adding directory paths, make sure to delete filenames with potentially the same name*/ removeSongFromDirectory(parentDirectory,*shortname); free(parent); return (Directory *)parentDirectory; } Directory * addParentPathToDB(char * utf8path, char ** shortname) { char * parent; Directory * parentDirectory; parent = strdup(parentPath(utf8path)); if(strlen(parent)==0) parentDirectory = (void *)mp3rootDirectory; else parentDirectory = addDirectoryPathToDB(parent,shortname); *shortname = utf8path+strlen(parent); while(*(*shortname) && *(*shortname)=='/') (*shortname)++; free(parent); return (Directory *)parentDirectory; } /* return values: -1 -> error 0 -> no error, but nothing updated 1 -> no error, and stuff updated */ int updatePath(char * utf8path) { Directory * directory; Directory * parentDirectory; Song * song; char * shortname; char * path = sanitizePathDup(utf8path); time_t mtime; int ret = 0; if(NULL==path) return -1; /* if path is in the DB try to update it, or else delete it */ if((directory = getDirectoryDetails(path,&shortname, &parentDirectory))) { /* if this update directory is successfull, we are done */ if((ret = updateDirectory(directory))>=0) { free(path); sortDirectory(directory); return ret; } /* we don't want to delete the root directory */ else if(directory == mp3rootDirectory) { free(path); return 0; } /* if updateDirectory fials, means we should delete it */ else { LOG("removing directory: %s\n",path); deleteFromList(parentDirectory->subDirectories, shortname); ret = 1; /* don't return, path maybe a song now*/ } } else if((song = getSongDetails(path,&shortname,&parentDirectory))) { /* if this song update is successfull, we are done */ if(song && isMusic(song->utf8file,&mtime)) { free(path); if(song->mtime==mtime) return 0; else if(updateSongInfo(song)==0) return 1; else { removeSongFromDirectory(parentDirectory, shortname); return 1; } } /* if updateDirectory fials, means we should delete it */ else { removeSongFromDirectory(parentDirectory,shortname); ret = 1; /* 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)) { parentDirectory = addParentPathToDB(path,&shortname); if(addToDirectory(parentDirectory,shortname,path)>0) ret = 1; } free(path); return ret; } /* return values: -1 -> error 0 -> no error, but nothing updated 1 -> no error, and stuff updated */ int updateDirectory(Directory * directory) { DIR * dir; char cwd[2]; struct dirent * ent; char * s; char * utf8; char * dirname = directory->utf8name; int ret = 0; cwd[0] = '.'; cwd[1] = '\0'; if(dirname==NULL) dirname=cwd; if(removeDeletedFromDirectory(directory)>0) ret = 1; if((dir = opendir(rmp2amp(utf8ToFsCharset(dirname))))==NULL) return -1; while((ent = readdir(dir))) { if(ent->d_name[0]=='.') continue; /* hide hidden stuff */ utf8 = fsCharsetToUtf8(ent->d_name); if(!utf8) continue; utf8 = strdup(utf8); if(directory->utf8name) { s = malloc(strlen(directory->utf8name)+strlen(utf8)+2); sprintf(s,"%s/%s",directory->utf8name,utf8); } else s = strdup(utf8); if(updateInDirectory(directory,utf8,s)>0) ret = 1; free(utf8); free(s); } closedir(dir); return ret; } /* return values: -1 -> error 0 -> no error, but nothing found 1 -> no error, and stuff found */ int exploreDirectory(Directory * directory) { DIR * dir; char cwd[2]; struct dirent * ent; char * s; char * utf8; char * dirname = directory->utf8name; int ret = 0; cwd[0] = '.'; cwd[1] = '\0'; if(dirname==NULL) dirname=cwd; DEBUG("explore: attempting to opendir: %s\n",dirname); if((dir = opendir(rmp2amp(utf8ToFsCharset(dirname))))==NULL) return -1; DEBUG("explore: %s\n",dirname); while((ent = readdir(dir))) { if(ent->d_name[0]=='.') continue; /* hide hidden stuff */ utf8 = fsCharsetToUtf8(ent->d_name); if(!utf8) continue; utf8 = strdup(utf8); DEBUG("explore: found: %s (%s)\n",ent->d_name,utf8); if(directory->utf8name) { s = malloc(strlen(directory->utf8name)+strlen(utf8)+2); sprintf(s,"%s/%s",directory->utf8name,utf8); } else s = strdup(utf8); if(addToDirectory(directory,utf8,s)>0) ret = 1; free(utf8); free(s); } closedir(dir); return ret; } int addSubDirectoryToDirectory(Directory * directory, char * shortname, char * name) { Directory * subDirectory = newDirectory(name); if(exploreDirectory(subDirectory)<1) { freeDirectory(subDirectory); return 0; } insertInList(directory->subDirectories,shortname,subDirectory); return 1; } int addToDirectory(Directory * directory, char * shortname, char * name) { if(isDir(name)) { return addSubDirectoryToDirectory(directory,shortname,name); } else if(isMusic(name,NULL)) { Song * song; song = addSongToList(directory->songs,shortname,name); if(!song) return -1; LOG("added %s\n",name); return 1; } DEBUG("addToDirectory: %s is not a directory or music\n",name); return -1; } void closeMp3Directory() { freeDirectory(mp3rootDirectory); } Directory * findSubDirectory(Directory * directory,char * name) { void * subDirectory; char * dup = strdup(name); char * key; key = strtok(dup,"/"); if(!key) { free(dup); return NULL; } if(findInList(directory->subDirectories,key,&subDirectory)) { free(dup); return (Directory *)subDirectory; } free(dup); return NULL; } Directory * getSubDirectory(Directory * directory, char * name, char ** shortname, Directory ** parentDirectory) { Directory * subDirectory; int len; if(name==NULL || name[0]=='\0' || strcmp(name,"/")==0) { return directory; } if((subDirectory = findSubDirectory(directory,name))==NULL) return NULL; *shortname = name; *parentDirectory = directory; len = 0; while(name[len]!='/' && name[len]!='\0') len++; while(name[len]=='/') len++; return getSubDirectory(subDirectory,&(name[len]),shortname, parentDirectory); } Directory * getDirectoryDetails(char * name, char ** shortname, Directory ** parentDirectory) { *shortname = NULL; *parentDirectory = NULL; return getSubDirectory(mp3rootDirectory,name,shortname,parentDirectory); } Directory * getDirectory(char * name) { char * shortname; Directory * parentDirectory; return getSubDirectory(mp3rootDirectory,name,&shortname, &parentDirectory); } int printDirectoryList(FILE * fp, DirectoryList * directoryList) { ListNode * node = directoryList->firstNode; Directory * directory; while(node!=NULL) { directory = (Directory *)node->data; myfprintf(fp,"%s%s\n",DIRECTORY_DIR,directory->utf8name); node = node->nextNode; } return 0; } int printDirectoryInfo(FILE * fp, char * name) { Directory * directory; if((directory = getDirectory(name))==NULL) { myfprintf(fp,"%s: directory not found\n",COMMAND_RESPOND_ERROR); return -1; } printDirectoryList(fp,directory->subDirectories); printSongInfoFromList(fp,directory->songs); return 0; } void writeDirectoryInfo(FILE * fp, Directory * directory) { ListNode * node = (directory->subDirectories)->firstNode; Directory * subDirectory; if(directory->utf8name) { myfprintf(fp,"%s%s\n",DIRECTORY_BEGIN,directory->utf8name); } while(node!=NULL) { subDirectory = (Directory *)node->data; myfprintf(fp,"%s%s\n",DIRECTORY_DIR,node->key); writeDirectoryInfo(fp,subDirectory); node = node->nextNode; } writeSongInfoFromList(fp,directory->songs); if(directory->utf8name) { myfprintf(fp,"%s%s\n",DIRECTORY_END,directory->utf8name); } } void readDirectoryInfo(FILE * fp,Directory * directory) { char buffer[MAXPATHLEN*2]; int bufferSize = MAXPATHLEN*2; char * key; Directory * subDirectory; char * name; int strcmpRet; ListNode * nextDirNode = directory->subDirectories->firstNode; ListNode * nodeTemp; while(myFgets(buffer,bufferSize,fp) && 0!=strncmp(DIRECTORY_END,buffer,strlen(DIRECTORY_END))) { if(0==strncmp(DIRECTORY_DIR,buffer,strlen(DIRECTORY_DIR))) { key = strdup(&(buffer[strlen(DIRECTORY_DIR)])); if(myFgets(buffer,bufferSize,fp)<0) { ERROR("Error reading db, fgets\n"); exit(EXIT_FAILURE); } /* for compatibility with db's prior to 0.11 */ if(0==strncmp(DIRECTORY_MTIME,buffer, strlen(DIRECTORY_MTIME))) { if(myFgets(buffer,bufferSize,fp)<0) { ERROR("Error reading db, fgets\n"); exit(EXIT_FAILURE); } } if(strncmp(DIRECTORY_BEGIN,buffer,strlen(DIRECTORY_BEGIN))) { ERROR("Error reading db at line: %s\n",buffer); exit(EXIT_FAILURE); } name = strdup(&(buffer[strlen(DIRECTORY_BEGIN)])); while(nextDirNode && (strcmpRet = strcmp(key,nextDirNode->key)) > 0) { nodeTemp = nextDirNode->nextNode; deleteNodeFromList(directory->subDirectories, nextDirNode); nextDirNode = nodeTemp; } if(NULL==nextDirNode) { subDirectory = newDirectory(name); insertInList(directory->subDirectories,key, (void *)subDirectory); } else if(strcmpRet == 0) { subDirectory = (Directory *)nextDirNode->data; nextDirNode = nextDirNode->nextNode; } else { subDirectory = newDirectory(name); insertInListBeforeNode( directory->subDirectories, nextDirNode, key, (void *)subDirectory); } free(key); free(name); readDirectoryInfo(fp,subDirectory); } else if(0==strncmp(SONG_BEGIN,buffer,strlen(SONG_BEGIN))) { readSongInfoIntoList(fp,directory->songs); } else { ERROR("Unknown line in db: %s\n",buffer); exit(EXIT_FAILURE); } } while(nextDirNode) { nodeTemp = nextDirNode->nextNode; deleteNodeFromList(directory->subDirectories,nextDirNode); nextDirNode = nodeTemp; } } void sortDirectory(Directory * directory) { ListNode * node = directory->subDirectories->firstNode; Directory * subDir; sortList(directory->subDirectories); sortList(directory->songs); while(node!=NULL) { subDir = (Directory *)node->data; sortDirectory(subDir); node = node->nextNode; } } int writeDirectoryDB() { FILE * fp; deleteEmptyDirectoriesInDirectory(mp3rootDirectory); sortDirectory(mp3rootDirectory); while(!(fp=fopen(directory_db,"w")) && errno==EINTR); if(!fp) return -1; /* block signals when writing the db so we don't get a corrupted db*/ myfprintf(fp,"%s\n",DIRECTORY_INFO_BEGIN); myfprintf(fp,"%s%s\n",DIRECTORY_MPD_VERSION,VERSION); myfprintf(fp,"%s%s\n",DIRECTORY_FS_CHARSET,getFsCharset()); myfprintf(fp,"%s\n",DIRECTORY_INFO_END); writeDirectoryInfo(fp,mp3rootDirectory); while(fclose(fp) && errno==EINTR); return 0; } int readDirectoryDB() { FILE * fp; if(!mp3rootDirectory) mp3rootDirectory = newDirectory(NULL); while(!(fp=fopen(directory_db,"r")) && errno==EINTR); if(!fp) return -1; /* get initial info */ { char buffer[100]; int bufferSize = 100; int foundFsCharset = 0; int foundVersion = 0; if(myFgets(buffer,bufferSize,fp)<0) { ERROR("Error reading db, fgets\n"); exit(EXIT_FAILURE); } if(0==strcmp(DIRECTORY_INFO_BEGIN,buffer)) { while(myFgets(buffer,bufferSize,fp) && 0!=strcmp(DIRECTORY_INFO_END,buffer)) { if(0==strncmp(DIRECTORY_MPD_VERSION,buffer, strlen(DIRECTORY_MPD_VERSION))) { if(foundVersion) { ERROR("already found " "version in db\n"); exit(EXIT_FAILURE); } foundVersion = 1; } else if(0==strncmp(DIRECTORY_FS_CHARSET,buffer, strlen(DIRECTORY_FS_CHARSET))) { char * fsCharset; char * tempCharset; if(foundFsCharset) { ERROR("already found " "fs charset in db\n"); exit(EXIT_FAILURE); } foundFsCharset = 1; fsCharset = &(buffer[strlen( DIRECTORY_FS_CHARSET)]); if((tempCharset = getConf()[CONF_FS_CHARSET]) && strcmp(fsCharset,tempCharset)) { ERROR("Using \"%s\" for the " "filesystem charset " "instead of \"%s\"\n", fsCharset,tempCharset); ERROR("maybe you need to " "recreate the db?\n"); setFsCharset(fsCharset); } } else { ERROR("directory: unknown line in db info: %s\n", buffer); exit(EXIT_FAILURE); } } } else { ERROR("db info not found in db file\n"); ERROR("you should recreate the db using --create-db\n"); fseek(fp,0,SEEK_SET); } } readDirectoryInfo(fp,mp3rootDirectory); while(fclose(fp) && errno==EINTR); stats.numberOfSongs = countSongsIn(stderr,NULL); stats.dbPlayTime = sumSongTimesIn(stderr,NULL); return 0; } int updateMp3Directory(FILE * fp) { switch(updateDirectory(mp3rootDirectory)) { case 0: /* nothing updated */ return 0; case 1: /* something was updated and db should be written */ break; default: ERROR("problems updating music db\n"); myfprintf(fp,"%s problems updating music db\n",COMMAND_RESPOND_ERROR); return -1; } if(writeDirectoryDB()<0) { ERROR("problems writing music db file, \"%s\"\n",directory_db); myfprintf(fp,"%s problems writing music db\n",COMMAND_RESPOND_ERROR); return -1; } return 0; } int traverseAllInSubDirectory(FILE * fp, Directory * directory, int (*forEachSong)(FILE *, Song *, void *), int (*forEachDir)(FILE *, Directory *, void *), void * data) { ListNode * node = directory->songs->firstNode; Song * song; Directory * dir; int errFlag = 0; if(forEachDir) { errFlag = forEachDir(fp,directory,data); if(errFlag) return errFlag; } if(forEachSong) { while(node!=NULL && !errFlag) { song = (Song *)node->data; errFlag = forEachSong(fp,song,data); node = node->nextNode; } if(errFlag) return errFlag; } node = directory->subDirectories->firstNode; while(node!=NULL && !errFlag) { dir = (Directory *)node->data; errFlag = traverseAllInSubDirectory(fp,dir,forEachSong, forEachDir,data); node = node->nextNode; } return errFlag; } int traverseAllIn(FILE * fp, char * name, int (*forEachSong)(FILE *, Song *, void *), int (*forEachDir)(FILE *, Directory *, void *), void * data) { Directory * directory; if((directory = getDirectory(name))==NULL) { Song * song; if((song = getSong(name)) && forEachSong) { return forEachSong(fp, song, data); } myfprintf(fp,"%s: directory or file not found\n",COMMAND_RESPOND_ERROR); return -1; } return traverseAllInSubDirectory(fp,directory,forEachSong,forEachDir, data); } int countSongsInDirectory(FILE * fp, Directory * directory, void * data) { int * count = (int *)data; *count+=directory->songs->numberOfNodes; return 0; } int printDirectoryInDirectory(FILE * fp, Directory * directory, void * data) { if(directory->utf8name) { myfprintf(fp,"directory: %s\n",directory->utf8name); } return 0; } int printSongInDirectory(FILE * fp, Song * song, void * data) { myfprintf(fp,"file: %s\n",song->utf8file); return 0; } int searchForAlbumInDirectory(FILE * fp, Song * song, void * string) { if(song->tag && song->tag->album) { char * dup = strDupToUpper(song->tag->album); if(strstr(dup,(char *)string)) printSongInfo(fp,song); free(dup); } return 0; } int searchForArtistInDirectory(FILE * fp, Song * song, void * string) { if(song->tag && song->tag->artist) { char * dup = strDupToUpper(song->tag->artist); if(strstr(dup,(char *)string)) printSongInfo(fp,song); free(dup); } return 0; } int searchForTitleInDirectory(FILE * fp, Song * song, void * string) { if(song->tag && song->tag->title) { char * dup = strDupToUpper(song->tag->title); if(strstr(dup,(char *)string)) printSongInfo(fp,song); free(dup); } return 0; } int searchForFilenameInDirectory(FILE * fp, Song * song, void * string) { char * dup = strDupToUpper(song->utf8file); if(strstr(dup,(char *)string)) printSongInfo(fp,song); free(dup); return 0; } int searchForSongsIn(FILE * fp, char * name, char * item, char * string) { char * dup = strDupToUpper(string); int ret = -1; if(strcmp(item,DIRECTORY_SEARCH_ALBUM)==0) { ret = traverseAllIn(fp,name,searchForAlbumInDirectory,NULL, (void *)dup); } else if(strcmp(item,DIRECTORY_SEARCH_ARTIST)==0) { ret = traverseAllIn(fp,name,searchForArtistInDirectory,NULL, (void *)dup); } else if(strcmp(item,DIRECTORY_SEARCH_TITLE)==0) { ret = traverseAllIn(fp,name,searchForTitleInDirectory,NULL, (void *)dup); } else if(strcmp(item,DIRECTORY_SEARCH_FILENAME)==0) { ret = traverseAllIn(fp,name,searchForFilenameInDirectory,NULL, (void *)dup); } else myfprintf(fp,"%s unknown table\n",COMMAND_RESPOND_ERROR); free(dup); return ret; } int findAlbumInDirectory(FILE * fp, Song * song, void * string) { if(song->tag && song->tag->album && strcmp((char *)string,song->tag->album)==0) { printSongInfo(fp,song); } return 0; } int findArtistInDirectory(FILE * fp, Song * song, void * string) { if(song->tag && song->tag->artist && strcmp((char *)string,song->tag->artist)==0) { printSongInfo(fp,song); } return 0; } int findSongsIn(FILE * fp, char * name, char * item, char * string) { if(strcmp(item,DIRECTORY_SEARCH_ALBUM)==0) { return traverseAllIn(fp,name,findAlbumInDirectory,NULL, (void *)string); } else if(strcmp(item,DIRECTORY_SEARCH_ARTIST)==0) { return traverseAllIn(fp,name,findArtistInDirectory,NULL, (void *)string); } myfprintf(fp,"%s unknown table\n",COMMAND_RESPOND_ERROR); return -1; } int printAllIn(FILE * fp, char * name) { return traverseAllIn(fp,name,printSongInDirectory, printDirectoryInDirectory,NULL); } int directoryAddSongToPlaylist(FILE * fp, Song * song, void * data) { return addSongToPlaylist(fp,song); } int addAllIn(FILE * fp, char * name) { return traverseAllIn(fp,name,directoryAddSongToPlaylist,NULL,NULL); } int directoryPrintSongInfo(FILE * fp, Song * song, void * data) { return printSongInfo(fp,song); } int sumSongTime(FILE * fp, Song * song, void * data) { unsigned long * time = (unsigned long *)data; if(song->tag && song->tag->time>=0) *time+=song->tag->time; return 0; } int printInfoForAllIn(FILE * fp, char * name) { return traverseAllIn(fp,name,directoryPrintSongInfo,NULL,NULL); } int countSongsIn(FILE * fp, char * name) { int count = 0; void * ptr = (void *)&count; traverseAllIn(fp,name,NULL,countSongsInDirectory,ptr); return count; } unsigned long sumSongTimesIn(FILE * fp, char * name) { unsigned long dbPlayTime = 0; void * ptr = (void *)&dbPlayTime; traverseAllIn(fp,name,sumSongTime,NULL,ptr); return dbPlayTime; } void initMp3Directory() { struct stat st; mp3rootDirectory = newDirectory(NULL); exploreDirectory(mp3rootDirectory); stats.numberOfSongs = countSongsIn(stderr,NULL); stats.dbPlayTime = sumSongTimesIn(stderr,NULL); if(stat(directory_db,&st)==0) directory_dbModTime = st.st_mtime; } Song * getSongDetails(char * file, char ** shortnameRet, Directory ** directoryRet) { void * song; Directory * directory; char * dir = NULL; char * dup = strdup(file); char * shortname = dup; char * c = strtok(dup,"/"); DEBUG("get song: %s\n",file); while(c) { shortname = c; c = strtok(NULL,"/"); } if(shortname!=dup) { for(c = dup; c < shortname-1; c++) { if(*c=='\0') *c = '/'; } dir = dup; } if(!(directory = getDirectory(dir))) { free(dup); return NULL; } if(!findInList(directory->songs,shortname,&song)) { free(dup); return NULL; } free(dup); if(shortnameRet) *shortnameRet = shortname; if(directoryRet) *directoryRet = directory; return (Song *)song; } Song * getSong(char * file) { return getSongDetails(file,NULL,NULL); } time_t getDbModTime() { return directory_dbModTime; } /* vim:set shiftwidth=4 tabstop=8 expandtab: */