DivestOS/Patches/LineageOS-18.1/android_bionic/0003-hosts_toggle.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tad <tad@spotco.us>
Date: Wed, 20 Apr 2022 00:40:52 -0400
Subject: [PATCH] Add a toggle to disable /etc/hosts lookup

Signed-off-by: Tad <tad@spotco.us>
Change-Id: I92679c57e73228dc194e61a86ea1a18b2ac90e04
---
 libc/dns/net/getaddrinfo.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libc/dns/net/getaddrinfo.c b/libc/dns/net/getaddrinfo.c
index cc94b21e2..12294da04 100644
--- a/libc/dns/net/getaddrinfo.c
+++ b/libc/dns/net/getaddrinfo.c
@@ -83,6 +83,7 @@
 #include <sys/stat.h>
 #include <sys/param.h>
 #include <sys/socket.h>
+#include <sys/system_properties.h>
 #include <sys/un.h>
 #include <net/if.h>
 #include <netinet/in.h>
@@ -2127,6 +2128,11 @@ _files_getaddrinfo(void *rv, void *cb_data, va_list ap)
 	name = va_arg(ap, char *);
 	pai = va_arg(ap, struct addrinfo *);
 
+	char value[PROP_VALUE_MAX] = { 0 };
+	if (__system_property_get("persist.security.hosts_disable", value) != 0)
+		if (atoi(value) != 0 && strcmp(name, "localhost") != 0 && strcmp(name, "ip6-localhost") != 0)
+			return NS_NOTFOUND;
+
 	memset(&sentinel, 0, sizeof(sentinel));
 	cur = &sentinel;
 	int gai_error = hc_getaddrinfo(name, NULL, pai, &cur);