commit fcf8ca156c415ee0c3c1b224205e09bddfad562e
from: Omar Polo <op@omarpolo.com>
date: Thu Dec 16 14:19:45 2021 UTC

allow directory to be read again using offset 0

The documentation says explicitly that the offset is *either* 0 or the
last offset plus count; that means that after some read a client can
require *again* an offset 0 (i.e. doing a rewinding the directory.)

commit - c439bed25a634bde8017633a14b40a9496caf39c
commit + fcf8ca156c415ee0c3c1b224205e09bddfad562e
blob - fb86658d52346ef5f9c4a628e5fbdb54f844ebf1
blob + d293743df8edb654dccfdcd81b600842f183b63f
--- client.c
+++ client.c
@@ -1274,6 +1274,11 @@ tread(struct np_msg_header *hdr, const uint8_t *data, 
 		else
 			np_read(hdr->tag, r, buf);
 	} else {
+		if (off == 0 && f->offset != 0) {
+			rewinddir(f->dir);
+			f->offset = 0;
+		}
+
 		if (off != f->offset) {
 			np_error(hdr->tag, "can't seek in directories");
 			return;