1 files changed, 210 insertions, 0 deletions
diff --git a/core/jni/android_util_SeempLog.cpp b/core/jni/android_util_SeempLog.cpp
new file mode 100644
index 0000000..c45b6ac
--- /dev/null
+++ b/core/jni/android_util_SeempLog.cpp
@@ -0,0 +1,210 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ * Not a Contribution.
+ *
+ * Copyright (C) 2007-2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <assert.h>
+#include <cutils/properties.h>
+#include <utils/String8.h>
+#include <android_runtime/Log.h>
+#include <utils/Log.h>
+#ifdef __BIONIC__
+#include <android/set_abort_message.h>
+#endif
+#include <utils/Log.h>
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include "utils/misc.h"
+#include "android_runtime/AndroidRuntime.h"
+
+#define LOG_BUF_SIZE 1024
+#define SEEMP_SOCK_NAME "/dev/socket/seempdw"
+#ifndef __unused
+#define __unused  __attribute__((__unused__))
+#endif
+
+static int __write_to_log_init(struct iovec *vec, size_t nr);
+static int (*write_to_log)(struct iovec *vec, size_t nr) = __write_to_log_init;
+static int logd_fd = -1;
+
+/* give up, resources too limited */
+static int __write_to_log_null(struct iovec *vec __unused,
+                               size_t nr __unused)
+{
+    return -1;
+}
+
+/* log_init_lock assumed */
+static int __write_to_log_initialize()
+{
+    int i, ret = 0;
+    if (logd_fd >= 0) {
+        i = logd_fd;
+        logd_fd = -1;
+        close(i);
+    }
+
+    i = socket(PF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+    if (i < 0) {
+        ret = -errno;
+        write_to_log = __write_to_log_null;
+    } else if (fcntl(i, F_SETFL, O_NONBLOCK) < 0) {
+        ret = -errno;
+        close(i);
+        i = -1;
+        write_to_log = __write_to_log_null;
+    } else {
+        struct sockaddr_un un;
+        memset(&un, 0, sizeof(struct sockaddr_un));
+        un.sun_family = AF_UNIX;
+        strlcpy(un.sun_path, SEEMP_SOCK_NAME, sizeof(un.sun_path));
+        if (connect(i, (struct sockaddr *)&un, sizeof(struct sockaddr_un)) < 0) {
+            ret = -errno;
+            close(i);
+            i = -1;
+        }
+    }
+    logd_fd = i;
+    return ret;
+}
+
+static int __write_to_log_socket(struct iovec *vec, size_t nr)
+{
+    ssize_t ret;
+    if (logd_fd < 0) {
+        return -EBADF;
+    }
+
+    /*
+     * The write below could be lost, but will never block.
+     *
+     * ENOTCONN occurs if logd dies.
+     * EAGAIN occurs if logd is overloaded.
+     */
+    ret = writev(logd_fd, vec, nr);
+    if (ret < 0) {
+        ret = -errno;
+        if (ret == -ENOTCONN) {
+            ret = __write_to_log_initialize();
+            if (ret < 0) {
+                return ret;
+            }
+
+            ret = writev(logd_fd, vec, nr);
+            if (ret < 0) {
+                ret = -errno;
+            }
+        }
+    }
+
+    return ret;
+}
+
+static int __write_to_log_init(struct iovec *vec, size_t nr)
+{
+    if (write_to_log == __write_to_log_init) {
+        int ret;
+
+        ret = __write_to_log_initialize();
+        if (ret < 0) {
+            return ret;
+        }
+
+        write_to_log = __write_to_log_socket;
+    }
+    return write_to_log(vec, nr);
+}
+
+int __android_seemp_socket_write(int len, const char *msg)
+{
+     struct iovec vec;
+     vec.iov_base   = (void *) msg;
+     vec.iov_len  = len;
+
+     return write_to_log(&vec, 1);
+}
+
+namespace android {
+
+/*
+ * In class android.util.Log:
+ *  public static native int println_native(int buffer, int priority, String tag, String msg)
+ */
+static jint android_util_SeempLog_println_native(JNIEnv* env, jobject clazz,
+                                jint api, jstring msgObj)
+{
+    if (msgObj == NULL) {
+        jniThrowNullPointerException(env, "seemp_println needs a message");
+        return -1;
+    }
+
+    int  apiId    = (int)api;
+    int  apiIdLen = sizeof(apiId);
+    int  msgLen   = env->GetStringUTFLength(msgObj);
+    int  len      = apiIdLen + 1 + msgLen + 1;
+    char *msg     = (char*)malloc(len);
+    if ( NULL == msg )
+    {
+        return -1;
+    }
+    char *params  = msg + apiIdLen + 1; // api_id + encoding byte + params
+
+    *((int*)msg)  = apiId;                              // copy api id
+    //                                                  // skip encoding byte
+    env->GetStringUTFRegion(msgObj, 0, msgLen, params); // copy message
+    msg[len - 1]  = 0;                                  // copy terminating zero
+
+    int  res      = __android_seemp_socket_write(len, msg); // send message
+
+    free(msg);
+
+    return res;
+}
+
+/*
+ * JNI registration.
+ */
+static JNINativeMethod gMethods[] = {
+    /* name, signature, funcPtr */
+    { "seemp_println_native",  "(ILjava/lang/String;)I",
+            (void*) android_util_SeempLog_println_native },
+};
+
+int register_android_util_SeempLog(JNIEnv* env)
+{
+    jclass clazz = env->FindClass("android/util/SeempLog");
+    if (clazz == NULL) {
+        return -1;
+    }
+
+    return AndroidRuntime::registerNativeMethods(env, "android/util/SeempLog", gMethods,
+            NELEM(gMethods));
+}
+
+}; // namespace android