From d545d2930e042b9ff7fbbda52fea0da047148b26 Mon Sep 17 00:00:00 2001
From: Rubin Xu <rubinxu@google.com>
Date: Sun, 10 Jan 2016 22:31:19 +0000
Subject: [PATCH] Add logd security buffer tag types and string write API.

Bug: 22860162
Change-Id: I1cceed3462eaebdd8208abf101b127f27f0023a7
---
 include/log/logd.h  |  1 +
 liblog/logd_write.c | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/include/log/logd.h b/include/log/logd.h
index b7aedaff6..b27160253 100644
--- a/include/log/logd.h
+++ b/include/log/logd.h
@@ -45,6 +45,7 @@ int __android_log_btwrite(int32_t tag, char type, const void *payload,
 int __android_log_bswrite(int32_t tag, const char *payload);
 
 int __android_log_security_bwrite(int32_t tag, const void *payload, size_t len);
+int __android_log_security_bswrite(int32_t tag, const char *payload);
 
 #ifdef __cplusplus
 }
diff --git a/liblog/logd_write.c b/liblog/logd_write.c
index 5406c50e1..55b965b91 100644
--- a/liblog/logd_write.c
+++ b/liblog/logd_write.c
@@ -668,3 +668,25 @@ int __android_log_bswrite(int32_t tag, const char *payload)
 
     return write_to_log(LOG_ID_EVENTS, vec, 4);
 }
+
+/*
+ * Like __android_log_security_bwrite, but used for writing strings to the
+ * security log.
+ */
+int __android_log_security_bswrite(int32_t tag, const char *payload)
+{
+    struct iovec vec[4];
+    char type = EVENT_TYPE_STRING;
+    uint32_t len = strlen(payload);
+
+    vec[0].iov_base = &tag;
+    vec[0].iov_len = sizeof(tag);
+    vec[1].iov_base = &type;
+    vec[1].iov_len = sizeof(type);
+    vec[2].iov_base = &len;
+    vec[2].iov_len = sizeof(len);
+    vec[3].iov_base = (void*)payload;
+    vec[3].iov_len = len;
+
+    return write_to_log(LOG_ID_SECURITY, vec, 4);
+}