If anything goes wrong with reading the 'sysctl hw.ucomnames', act

like it is the empty string, rather than considering it an error.
ok krw

diff --git a/usr.bin/cu/cu.c b/usr.bin/cu/cu.c
index b6e7a47..323f5ee 100644 (file)
--- a/usr.bin/cu/cu.c
+++ b/usr.bin/cu/cu.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cu.c,v 1.30 2023/12/21 11:25:38 jca Exp $ */
+/* $OpenBSD: cu.c,v 1.31 2024/02/10 15:29:04 deraadt Exp $ */
 
 /*
  * Copyright (c) 2012 Nicholas Marriott <nicm@openbsd.org>
@@ -488,13 +488,13 @@ get_ucomnames(void)
        size = 0;
        for (;;) {
                if (sysctl(mib, 2, NULL, &size, NULL, 0) == -1 || size == 0)
-                       err(1, "hw.ucomnames");
+                       return NULL;
                if ((names = realloc(names, size)) == NULL)
                        err(1, NULL);
                if (sysctl(mib, 2, names, &size, NULL, 0) != -1)
                        break;
                if (errno != ENOMEM)
-                       err(1, "hw.ucomnames");
+                       return NULL;
        }
        return names;
 }