Userland test changes.

userland/bin/ls/ls.c

@@ -177,7 +177,7 @@ print(const char *path)
 			typech = '?';
 		}
 
-		printf("%crwx------ %2d root  %-8llu",
+		printf("%crwx------ %2d root  %-7llu ",
 		       typech,
 		       statbuf.st_nlink,
 		       statbuf.st_size);

userland/bin/tac/tac.c

@@ -197,11 +197,9 @@ dumpdata(void)
 
 	indexsize = dolseek(indexfd, indexname, 0, SEEK_CUR);
 	pos = indexsize;
-	while (1) {
+	assert(pos % sizeof(x) == 0);
+	while (pos > 0) {
 		pos -= sizeof(x);
-		if (pos == 0) {
-			break;
-		}
 		assert(pos >= 0);
 		dolseek(indexfd, indexname, pos, SEEK_SET);