From: Roy Marples <roy@marples.name>
Date: Thu, 18 May 2023 11:27:10 +0000 (+0100)
Subject: Linux: fix disabling of kernel RA autoconf
X-Git-Tag: v9.5.2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=953bf1e8f826c00960b2618ed25f02dfcede2518;p=thirdparty%2Fdhcpcd.git

Linux: fix disabling of kernel RA autoconf

Well, that was a big whups leaving it turned on.
Thanks to Klaus Frank for the spot.
Fixes #176.
---

diff --git a/src/if-linux.c b/src/if-linux.c
index 5600f0cc..ecb82b7b 100644
--- a/src/if-linux.c
+++ b/src/if-linux.c
@@ -2107,7 +2107,12 @@ if_setup_inet6(const struct interface *ifp)
 
 	snprintf(path, sizeof(path), "%s/%s/autoconf", p_conf, ifp->name);
 	ra = check_proc_int(ctx, path);
-	if (ra != 1 && ra != -1) {
+	if (ra == -1) {
+		/* The sysctl probably doesn't exist, but this isn't an
+		 * error as such so just log it and continue */
+		if (errno != ENOENT)
+			logerr("%s: %s", __func__, path);
+	} else if (ra != 0) {
 		if (if_writepathuint(ctx, path, 0) == -1)
 			logerr("%s: %s", __func__, path);
 	}