From: Karel Zak <kzak@redhat.com>
Date: Mon, 13 Jul 2026 10:07:25 +0000 (+0200)
Subject: agetty: check fcntl() return value [coverity: CID 503788]
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c93fa6fdc0d13029170a60a84609dceb71eb338;p=thirdparty%2Futil-linux.git

agetty: check fcntl() return value [coverity: CID 503788]

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

diff --git a/agetty-cmd/tty.c b/agetty-cmd/tty.c
index e56e5f1bb..38a963658 100644
--- a/agetty-cmd/tty.c
+++ b/agetty-cmd/tty.c
@@ -193,8 +193,9 @@ void agetty_reset_vc(const struct agetty_options *op, struct termios *tp, int ca
 		agetty_log_warn(_("setting terminal attributes failed: %m"));
 
 	/* Go to blocking input even in local mode. */
-	fcntl(STDIN_FILENO, F_SETFL,
-	      fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK);
+	fl = fcntl(STDIN_FILENO, F_GETFL, 0);
+	if (fl >= 0)
+		fcntl(STDIN_FILENO, F_SETFL, fl & ~O_NONBLOCK);
 }
 
 void agetty_open_tty(const char *tty, struct termios *tp, struct agetty_options *op)