Restore ability to use hostnames to configure ip addresses.

Unveil /etc/{resolv.conf,hosts,services} which keeps it in sync with
the kernel bypass for pledge("dns").
OK deraadt
pointed out by & OK stsp

diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
index f36de28..d14bb54 100644 (file)
--- a/sbin/ifconfig/ifconfig.c
+++ b/sbin/ifconfig/ifconfig.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ifconfig.c,v 1.375 2018/08/12 23:50:31 ccardenas Exp $        */
+/*     $OpenBSD: ifconfig.c,v 1.376 2018/08/15 14:43:30 florian Exp $  */
 /*     $NetBSD: ifconfig.c,v 1.40 1997/10/01 02:19:43 enami Exp $      */
 
 /*
@@ -749,7 +749,11 @@ main(int argc, char *argv[])
        }
 
        if (!found_rulefile) {
-               if (unveil("/", "") == -1)
+               if (unveil("/etc/resolv.conf", "r") == -1)
+                       err(1, "unveil");
+               if (unveil("/etc/hosts", "r") == -1)
+                       err(1, "unveil");
+               if (unveil("/etc/services", "r") == -1)
                        err(1, "unveil");
                if (unveil(NULL, NULL) == -1)
                        err(1, "unveil");