/*
* Copyright � 2007 Alistair Crooks.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
*    products derived from this software without specific prior written
*    permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>

#include <db.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fuse.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "virtdir.h"
#include "defs.h"

static char             *prefix; /* where the music is */
static int               verbose; /* how chatty are we? */

static BTREEINFO         bt;

static virtdir_t         id3;


/* perform the stat operation */
/* if this is the root, then just synthesise the data */
/* otherwise, retrieve the data, and be sure to fill in the size */
static int
id3fs_getattr(const char *path, struct stat *st)
{
       virt_dirent_t   *ep;

       if (strcmp(path, "/") == 0) {
               (void) memset(st, 0x0, sizeof(*st));
               st->st_mode = S_IFDIR | 0755;
               st->st_nlink = 2;
               return 0;
       }
       if ((ep = virtdir_find(&id3, path, strlen(path))) == NULL) {
               return -ENOENT;
       }
       switch(ep->type) {
       case 'f':
               (void) memcpy(st, &id3.file, sizeof(*st));
               break;
       case 'd':
               (void) memcpy(st, &id3.dir, sizeof(*st));
               break;
       case 'l':
               (void) memcpy(st, &id3.lnk, sizeof(*st));
               st->st_size = ep->tgtlen;
               break;
       }
       return 0;
}

/* readdir operation */
static int
id3fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
             off_t offset, struct fuse_file_info * fi)
{
       virt_dirent_t   *dp;
       VIRTDIR         *dirp;

       if ((dirp = openvirtdir(&id3, path)) == NULL) {
               return 0;
       }
       filler(buf, ".", NULL, 0);
       filler(buf, "..", NULL, 0);
       while ((dp = readvirtdir(dirp)) != NULL) {
               filler(buf, dp->d_name, NULL, 0);
       }
       closevirtdir(dirp);
       return 0;
}

/* open the file in the file system */
static int
id3fs_open(const char *path, struct fuse_file_info * fi)
{
       return 0;
}

/* read the file's contents in the file system */
static int
id3fs_read(const char *path, char *buf, size_t size, off_t offset,
          struct fuse_file_info * fi)
{
       return 0;
}

/* fill in the statvfs struct */
static int
id3fs_statfs(const char *path, struct statvfs *st)
{
       (void) memset(st, 0x0, sizeof(*st));
       return 0;
}

/* read the symbolic link */
static int
id3fs_readlink(const char *path, char *buf, size_t size)
{
       virt_dirent_t   *ep;

       if ((ep = virtdir_find(&id3, path, strlen(path))) == NULL) {
               return -ENOENT;
       }
       if (ep->tgt == NULL) {
               return -ENOENT;
       }
       (void) strlcpy(buf, ep->tgt, size);
       return 0;
}

/* operations struct */
static struct fuse_operations id3fs_oper = {
       .getattr = id3fs_getattr,
       .readlink = id3fs_readlink,
       .readdir = id3fs_readdir,
       .open = id3fs_open,
       .read = id3fs_read,
       .statfs = id3fs_statfs
};

/* build up a fuse_tree from the information in the database */
static void
build_id3_tree(DB *db, virtdir_t *tp)
{
       struct stat      dir;
       struct stat      f;
       const char      *d;
       char             name[MAXPATHLEN];
       char            *slash;
       char            *key;
       char            *val;
       int              flag;
       DBT              k;
       DBT              v;

       (void) stat(".", &dir);
       (void) memcpy(&f, &dir, sizeof(f));
       f.st_mode = S_IFREG | 0644;
       (void) memset(&k, 0x0, sizeof(k));
       (void) memset(&v, 0x0, sizeof(v));
       for (flag = R_FIRST ; (*db->seq)(db, &k, &v, flag) == 0 ; flag = R_NEXT) {
               key = (char *) k.data;
               switch (*key) {
               case 'a':
                       d = "/artists";
                       break;
               case 'g':
                       d = "/genre";
                       break;
               case 'y':
                       d = "/year";
                       break;
               default:
                       continue;
               }
               val = (char *) v.data;
               if ((slash = strrchr(key, '/')) == NULL) {
                       slash = key;
               }
               slash += 1;
               /* add the symbolic link in that directory */
               (void) snprintf(name, sizeof(name), "%s/%s/%s", d, val, slash);
               if (!virtdir_find(tp, name, strlen(name))) {
                       virtdir_add(tp, name, strlen(name), 'l', key + 1,
                               strlen(key + 1));
               }
       }
}

int
main(int argc, char **argv)
{
       char     name[MAXPATHLEN];
       int      i;
       DB      *db;

       while ((i = getopt(argc, argv, "p:v")) != -1) {
               switch(i) {
               case 'p':
                       prefix = optarg;
                       break;
               case 'v':
                       verbose = 1;
                       break;
               }
       }
       bt.lorder = 4321;
       (void) snprintf(name, sizeof(name), "%s/%s", (prefix) ? prefix : "/usr/music", ".id3.db");
       if ((db = dbopen(name, O_RDONLY, 0666, DB_BTREE, &bt)) == NULL) {
               warn("null id3 database");
       }
       build_id3_tree(db, &id3);
       return fuse_main(argc, argv, &id3fs_oper, NULL);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.