From: Karel Zak <kzak@redhat.com>
Date: Thu, 16 May 2019 11:46:03 +0000 (+0200)
Subject: utmpdump: check ftello() return value
X-Git-Tag: v2.34-rc2~59
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e868cfb0a6c2b942029b95c85168f7da116d5c06;p=thirdparty%2Futil-linux.git

utmpdump: check ftello() return value

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/login-utils/utmpdump.c b/login-utils/utmpdump.c
index f1a3607dc0..defa230b9a 100644
--- a/login-utils/utmpdump.c
+++ b/login-utils/utmpdump.c
@@ -169,6 +169,9 @@ static int follow_by_inotify(FILE *in, const char *filename, FILE *out)
 	size = ftello(in);
 	fclose(in);
 
+	if (size < 0)
+		err(EXIT_FAILURE, _("%s: cannot get file position"), filename);
+
 	wd = inotify_add_watch(fd, filename, EVENTS);
 	if (wd == -1)
 		err(EXIT_FAILURE, _("%s: cannot add inotify watch."), filename);