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nusb/ptp: set storage name to their human readable description string

--- a/sys/src/cmd/nusb/ptp/ptp.c

+++ b/sys/src/cmd/nusb/ptp/ptp.c

@@ -526,8 +526,22 @@

 		x->handle = 0xffffffff;

 		x->d.qid.type = QTDIR;

 		x->d.mode = DMDIR|0777;

-		x->d.name = emalloc9p(10);

-		sprint(x->d.name, "%x", x->store);

+

+		if(ptprpc(r, GetStorageInfo, 1|DataRecv, NUM(path), &p, &np) < 0)

+			break;

+		if(debug)

+			hexdump("storageinfo", p, np);

+		if(np < 26){

+			werrstr("bad storageinfo");

+			break;

+		}

+

+		if((x->d.name = ptpstring2(p+26, p+np)) == nil){

+			werrstr("bad storageinfo");

+			break;

+		}

+

+		free(p);

 		goto Addnode;

 	case Qobj: