From: Daniel Danzberger <daniel@dd-wrt.com>
Date: Mon, 2 Aug 2021 09:50:00 +0000 (+0200)
Subject: libblkid-tiny: fix invalid open syscall return check
X-Git-Url: http://git.openwrt.org/feed/packages.git%5Ecd5c448758f30868770b9ebf8b656c1a4211a240?a=commitdiff_plain;h=141ac851aee06512934ba6fbd90af78066593844;p=project%2Ffstools.git

libblkid-tiny: fix invalid open syscall return check

open() returns -1 on error, not 0 (stdin).

Signed-off-by: Daniel Danzberger <daniel@dd-wrt.com>
---

diff --git a/libblkid-tiny/libblkid-tiny.c b/libblkid-tiny/libblkid-tiny.c
index 18db4ef..6e8cd81 100644
--- a/libblkid-tiny/libblkid-tiny.c
+++ b/libblkid-tiny/libblkid-tiny.c
@@ -196,7 +196,7 @@ int probe_block(char *block, struct blkid_struct_probe *pr)
 
 	pr->err = -1;
 	pr->fd = open(block, O_RDONLY);
-	if (!pr->fd)
+	if (pr->fd == -1)
 		return -1;
 
 	for (i = 0; i < ARRAY_SIZE(idinfos); i++) {