Index: lib/libc/gen/err.3
===================================================================
--- lib/libc/gen/err.3
+++ lib/libc/gen/err.3
@@ -28,7 +28,7 @@
 .\"	From: @(#)err.3	8.1 (Berkeley) 6/9/93
 .\" $FreeBSD$
 .\"
-.Dd March 29, 2012
+.Dd December 16, 2020
 .Dt ERR 3
 .Os
 .Sh NAME
@@ -196,7 +196,7 @@
 	warnx("%s: %s: trying the block device",
 	    raw_device, strerror(errno));
 if ((fd = open(block_device, O_RDONLY, 0)) == -1)
-	err(EX_OSFILE, "%s", block_device);
+	warn(EX_OSFILE, "%s", block_device);
 .Ed
 .Pp
 Warn of an error without using the global variable