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/*
* 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);
}
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