Special case init for android_is_in_vendor_process.

Init is executed without ld.config.<ver>.txt loaded (since sysprop
service isn't up in order for it to read ro.vndk.version and know <ver>). It uses the hard-coded
namespaces in the linker and therefore, does not know about the vndk namespace. That does not mean
it is not a system process.

Bug: 124128212

Test: Boot up device with selinux enforced, use camera to take pictures/ record videos (sanity)
Test: Watch movies on youtube (sanity)

Change-Id: If8701af2ee5dfa3bb36d0ce0a17a23808d184d9f
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
diff --git a/libvndksupport/linker.c b/libvndksupport/linker.c
index 821940a..84c2132 100644
--- a/libvndksupport/linker.c
+++ b/libvndksupport/linker.c
@@ -20,6 +20,8 @@
 
 #define LOG_TAG "vndksupport"
 #include <log/log.h>
+#include <sys/types.h>
+#include <unistd.h>
 
 __attribute__((weak)) extern struct android_namespace_t* android_get_exported_namespace(const char*);
 __attribute__((weak)) extern void* android_dlopen_ext(const char*, int, const android_dlextinfo*);
@@ -46,6 +48,11 @@
 }
 
 int android_is_in_vendor_process() {
+    // Special case init, since when init runs, ld.config.<ver>.txt hasn't been
+    // loaded (sysprop service isn't up for init to know <ver>).
+    if (getpid() == 1) {
+        return 0;
+    }
     if (android_get_exported_namespace == NULL) {
         ALOGD("android_get_exported_namespace() not available. Assuming system process.");
         return 0;