static int xz_open(ventry *ve, int flags, avmode_t mode, void **resp)
{
int res;
vfile *base;
struct xznode *nod;
struct xzhandle *fil;
if(flags & AVO_DIRECTORY)
return -ENOTDIR;
if(AV_ISWRITE(flags))
return -EROFS;
res = av_open(ve->mnt->base, AVO_RDONLY, 0, &base);
if(res < 0)
return res;
res = xz_getnode(ve, base, &nod);
if(res < 0) {
av_close(base);
return res;
}
AV_NEW(fil);
if((flags & AVO_ACCMODE) != AVO_NOPERM)
fil->zfil = av_xzfile_new(base);
else
fil->zfil = NULL;
fil->base = base;
fil->node = nod;
*resp = fil;
return 0;
}
static int random_proper(void *ret_data, size_t length) {
int fd, ret = -1;
ssize_t r = 0;
const char *const * device;
av_assert(ret_data);
av_assert(length > 0);
device = devices;
while (*device) {
ret = 0;
if ((fd = open(*device, O_RDONLY | O_NOCTTY)) >= 0) {
if ((r = av_loop_read(fd, ret_data, length, NULL)) < 0 || (size_t) r != length)
ret = -1;
av_close(fd);
} else
ret = -1;
if (ret == 0)
break;
device++;
}
return ret;
}
static int xz_close(vfile *vf)
{
struct xzhandle *fil = (struct xzhandle *) vf->data;
av_unref_obj(fil->zfil);
av_unref_obj(fil->node);
av_close(fil->base);
av_free(fil);
return 0;
}