static int
volicon_read_buf(const char *path, struct fuse_bufvec **bufp, size_t size,
off_t offset, struct fuse_file_info *fi)
{
int res = 0;
if (volicon_is_icon_magic_file(path)) {
struct fuse_bufvec *buf;
void *mem;
size_t a_size;
buf = malloc(sizeof(struct fuse_bufvec));
if (buf == NULL) {
return -ENOMEM;
}
if ((offset + size) <= volicon_get()->volicon_size) {
a_size = size;
} else if (offset < volicon_get()->volicon_size) {
a_size = volicon_get()->volicon_size - offset;
} else {
a_size = 0;
}
mem = malloc(a_size);
if (mem == NULL) {
free(buf);
return -ENOMEM;
}
memcpy(mem, (char *)(volicon_get()->volicon_data) + offset,
a_size);
*buf = FUSE_BUFVEC_INIT(size);
buf->buf[0].mem = mem;
buf->buf[0].size = a_size;
*bufp = buf;
} else {
res = fuse_fs_read_buf(volicon_get()->next, path, bufp, size,
offset, fi);
}
return res;
}
static int
volicon_read(const char *path, char *buf, size_t size, off_t off,
struct fuse_file_info *fi)
{
int res = 0;
if (volicon_is_icon_magic_file(path)) {
size_t a_size = size;
if (off < volicon_get()->volicon_size) {
if ((off + size) > volicon_get()->volicon_size) {
a_size = volicon_get()->volicon_size - off;
}
memcpy(buf, (char *)(volicon_get()->volicon_data) + off, a_size);
res = a_size;
}
} else {
res = fuse_fs_read(volicon_get()->next, path, buf, size, off, fi);
}
return res;
}
static int
volicon_getattr(const char *path, struct stat *buf)
{
int res = 0;
if (volicon_is_icon_magic_file(path)) {
memset((void *)buf, 0, sizeof(struct stat));
buf->st_mode = S_IFREG | 0444;
buf->st_nlink = 1;
buf->st_uid = volicon_get()->volicon_uid;
buf->st_gid = 0;
buf->st_size = volicon_get()->volicon_size;
buf->st_atime = buf->st_ctime = buf->st_mtime = time(NULL);
} else {
res = fuse_fs_getattr(volicon_get()->next, path, buf);
}
return res;
}
static __inline__ int
volicon_is_a_magic_file(const char *path)
{
return (volicon_is_icon_magic_file(path));
}
