Allow empty files in torrents. Create them in stat_and_adjust and let the

stream abstraction skip past them.

btpd/content.c

@@ -595,6 +595,12 @@ again:
             if (truncate(path, tp->files[i].length) != 0)
                 return errno;
             goto again;
+        } else if (ret[i].size == -1 && tp->files[i].length == 0) {
+            int fd;
+            errno = vopen(&fd, O_CREAT|O_RDWR, "%s", path);
+            if (errno != 0 || close(fd) != 0)
+                return errno;
+            goto again;
         }
     }
     return 0;

misc/metainfo.c

@@ -279,7 +279,7 @@ mi_test_files(const char *files)
         int pcount = 0;
         if (!benc_isdct(fdct))
             return 0;
-        if (benc_dget_int(fdct, "length") <= 0)
+        if (benc_dget_int(fdct, "length") < 0)
             return 0;
         if ((plst = benc_dget_lst(fdct, "path")) == NULL)
             return 0;

misc/stream.c

@@ -83,6 +83,8 @@ bts_get(struct bt_stream *bts, off_t off, uint8_t *buf, size_t len)
     boff = 0;
     while (boff < len) {
         if (bts->fd == -1) {
+            while (bts->files[bts->index].length == 0)
+                bts->index++;
             err = bts->fd_cb(bts->files[bts->index].path,
                 &bts->fd, bts->fd_arg);
             if (err != 0)
@@ -125,6 +127,8 @@ bts_put(struct bt_stream *bts, off_t off, const uint8_t *buf, size_t len)
     boff = 0;
     while (boff < len) {
         if (bts->fd == -1) {
+            while (bts->files[bts->index].length == 0)
+                bts->index++;
             err = bts->fd_cb(bts->files[bts->index].path,
                 &bts->fd, bts->fd_arg);
             if (err != 0)