uname: Fix written linkname

1 files changed, 8 insertions, 3 deletions

diff --git a/src/ustar.c b/src/ustar.c
index e1771c3..f14a3d4 100644
--- a/src/ustar.c
+++ b/src/ustar.c
@@ -308,9 +308,14 @@ opkg_opk_ustar_write_header(struct opkg_opk_ustar *ustar,
 		default:
 			return OPKG_OPK_ERROR;  /* Unsupported */
 	}
-	linkname_len = strlen(linkname);
-	memcpy(ustar->header.linkname, linkname, linkname_len);
-	ustar->header.linkname[linkname_len] = '\0';
+	if (*ustar->header.typeflag == '2') {
+		linkname_len = strlen(linkname);
+		memcpy(ustar->header.linkname, linkname, linkname_len);
+	} else {
+		linkname_len = 0;
+	}
+	memset(ustar->header.linkname, 0,
+			sizeof(ustar->header.linkname) - linkname_len);
 	if (opkg_opk_gzip_write(ustar->gzip, &ustar->header,
 				OPKG_OPK_USTAR_RECORD_SIZE, 0) != OPKG_OPK_OK) {
 		return OPKG_OPK_ERROR;