diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index e7f1a07..a4a0b52 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -1303,6 +1303,36 @@
     return num;
 }
 
+static std::string fb_fix_numeric_var(std::string var) {
+    // Some bootloaders (angler, for example), send spurious leading whitespace.
+    var = android::base::Trim(var);
+    // Some bootloaders (hammerhead, for example) use implicit hex.
+    // This code used to use strtol with base 16.
+    if (!android::base::StartsWith(var, "0x")) var = "0x" + var;
+    return var;
+}
+
+static unsigned fb_get_flash_block_size(Transport* transport, std::string name) {
+    std::string sizeString;
+    if (!fb_getvar(transport, name.c_str(), &sizeString)) {
+        /* This device does not report flash block sizes, so return 0 */
+        return 0;
+    }
+    sizeString = fb_fix_numeric_var(sizeString);
+
+    unsigned size;
+    if (!android::base::ParseUint(sizeString, &size)) {
+        fprintf(stderr, "Couldn't parse %s '%s'.\n", name.c_str(), sizeString.c_str());
+        return 0;
+    }
+    if (size < 4096 || (size & (size - 1)) != 0) {
+        fprintf(stderr, "Invalid %s %u: must be a power of 2 and at least 4096.\n",
+                name.c_str(), size);
+        return 0;
+    }
+    return size;
+}
+
 static void fb_perform_format(Transport* transport,
                               const char* partition, int skip_if_not_supported,
                               const char* type_override, const char* size_override,
@@ -1345,11 +1375,7 @@
         }
         partition_size = size_override;
     }
-    // Some bootloaders (angler, for example), send spurious leading whitespace.
-    partition_size = android::base::Trim(partition_size);
-    // Some bootloaders (hammerhead, for example) use implicit hex.
-    // This code used to use strtol with base 16.
-    if (!android::base::StartsWith(partition_size, "0x")) partition_size = "0x" + partition_size;
+    partition_size = fb_fix_numeric_var(partition_size);
 
     gen = fs_get_generator(partition_type);
     if (!gen) {
@@ -1370,7 +1396,12 @@
     }
 
     fd = fileno(tmpfile());
-    if (fs_generator_generate(gen, fd, size, initial_dir)) {
+
+    unsigned eraseBlkSize, logicalBlkSize;
+    eraseBlkSize = fb_get_flash_block_size(transport, "erase-block-size");
+    logicalBlkSize = fb_get_flash_block_size(transport, "logical-block-size");
+
+    if (fs_generator_generate(gen, fd, size, initial_dir, eraseBlkSize, logicalBlkSize)) {
         fprintf(stderr, "Cannot generate image: %s\n", strerror(errno));
         close(fd);
         return;
diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index 9b73165..5d9ccfe 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -14,18 +14,21 @@
 #include <ext4_utils/make_ext4fs.h>
 #include <sparse/sparse.h>
 
-static int generate_ext4_image(int fd, long long partSize, const std::string& initial_dir)
+static int generate_ext4_image(int fd, long long partSize, const std::string& initial_dir,
+                                       unsigned eraseBlkSize, unsigned logicalBlkSize)
 {
     if (initial_dir.empty()) {
-        make_ext4fs_sparse_fd(fd, partSize, NULL, NULL);
+        make_ext4fs_sparse_fd_align(fd, partSize, NULL, NULL, eraseBlkSize, logicalBlkSize);
     } else {
-        make_ext4fs_sparse_fd_directory(fd, partSize, NULL, NULL, initial_dir.c_str());
+        make_ext4fs_sparse_fd_directory_align(fd, partSize, NULL, NULL, initial_dir.c_str(),
+                                              eraseBlkSize, logicalBlkSize);
     }
     return 0;
 }
 
 #ifdef USE_F2FS
-static int generate_f2fs_image(int fd, long long partSize, const std::string& initial_dir)
+static int generate_f2fs_image(int fd, long long partSize, const std::string& initial_dir,
+                               unsigned /* unused */, unsigned /* unused */)
 {
     if (!initial_dir.empty()) {
         fprintf(stderr, "Unable to set initial directory on F2FS filesystem\n");
@@ -39,7 +42,8 @@
     const char* fs_type;  //must match what fastboot reports for partition type
 
     //returns 0 or error value
-    int (*generate)(int fd, long long partSize, const std::string& initial_dir);
+    int (*generate)(int fd, long long partSize, const std::string& initial_dir,
+                    unsigned eraseBlkSize, unsigned logicalBlkSize);
 
 } generators[] = {
     { "ext4", generate_ext4_image},
@@ -58,7 +62,7 @@
 }
 
 int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize,
-    const std::string& initial_dir)
+    const std::string& initial_dir, unsigned eraseBlkSize, unsigned logicalBlkSize)
 {
-    return gen->generate(tmpFileNo, partSize, initial_dir);
+    return gen->generate(tmpFileNo, partSize, initial_dir, eraseBlkSize, logicalBlkSize);
 }
diff --git a/fastboot/fs.h b/fastboot/fs.h
index 0a68507..0a5f5a4 100644
--- a/fastboot/fs.h
+++ b/fastboot/fs.h
@@ -8,6 +8,6 @@
 
 const struct fs_generator* fs_get_generator(const std::string& fs_type);
 int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize,
-    const std::string& initial_dir);
+    const std::string& initial_dir, unsigned eraseBlkSize = 0, unsigned logicalBlkSize = 0);
 
 #endif
diff --git a/init/.clang-format b/init/.clang-format
new file mode 100644
index 0000000..48d423f
--- /dev/null
+++ b/init/.clang-format
@@ -0,0 +1,14 @@
+---
+Language:        Cpp
+BasedOnStyle:  Google
+BinPackArguments: true
+BinPackParameters: true
+ColumnLimit:     100
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+IndentWidth:     4
+Standard:        Auto
+TabWidth:        8
+UseTab:          Never
+DerivePointerAlignment: false
+PointerAlignment: Left
+...
diff --git a/init/Android.mk b/init/Android.mk
index 9e61fb2..a10a714 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -134,3 +134,8 @@
 LOCAL_CLANG := true
 LOCAL_CPPFLAGS := -Wall -Wextra -Werror
 include $(BUILD_NATIVE_TEST)
+
+
+# Include targets in subdirs.
+# =========================================================
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/init/test_service/Android.mk b/init/test_service/Android.mk
new file mode 100644
index 0000000..30c9e9d
--- /dev/null
+++ b/init/test_service/Android.mk
@@ -0,0 +1,27 @@
+# Copyright (C) 2016 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.
+
+LOCAL_PATH := $(call my-dir)
+
+# Sample service for testing.
+# =========================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := test_service
+LOCAL_SRC_FILES := test_service.cpp
+
+LOCAL_SHARED_LIBRARIES += libbase
+
+LOCAL_INIT_RC := test_service.rc
+
+include $(BUILD_EXECUTABLE)
diff --git a/init/test_service/README.md b/init/test_service/README.md
new file mode 100644
index 0000000..6773235
--- /dev/null
+++ b/init/test_service/README.md
@@ -0,0 +1,43 @@
+# Sample service for testing
+This is a sample service that can be used for testing init.
+
+## Design
+The service includes a `.rc` file that allows starting it from init.
+
+    service test_service /system/bin/test_service CapAmb 0000000000003000
+        class main
+        user system
+        group system
+        capabilities NET_ADMIN NET_RAW
+        disabled
+        oneshot
+
+The service accepts any even number of arguments on the command line
+(i.e. any number of pairs of arguments.)
+It will attempt to find the first element of each pair of arguments in
+`/proc/self/status`, and attempt to exactly match the second element of the pair
+to the relevant line of `proc/self/status`.
+
+### Example
+In the above case, the service will look for lines containing `CapAmb`:
+
+    cat /proc/self/status
+    ...
+    CapAmb:	0000000000003000
+
+And then attempt to exactly match the token after `:`, `0000000000003000`,
+with the command-line argument.
+If they match, the service exits successfully. If not, the service will exit
+with an error.
+
+## Usage
+	mmma -j <jobs> system/core/init/testservice
+	adb root
+	adb remount
+	adb sync
+	adb reboot
+	adb root
+	adb shell start test_service
+	adb logcat -b all -d | grep test_service
+
+Look for an exit status of 0.
diff --git a/init/test_service/test_service.cpp b/init/test_service/test_service.cpp
new file mode 100644
index 0000000..e7206f8
--- /dev/null
+++ b/init/test_service/test_service.cpp
@@ -0,0 +1,78 @@
+// Copyright (C) 2016 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 <unistd.h>
+
+#include <map>
+#include <sstream>
+#include <string>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/strings.h>
+
+void Usage(char* argv[]) {
+    printf("Usage: %s <status field> <value> [<status field> <value>]*\n", argv[0]);
+    printf("E.g.: $ %s Uid \"1000 1000 1000 1000\"\n", argv[0]);
+}
+
+int main(int argc, char* argv[]) {
+    if (argc < 3) {
+        Usage(argv);
+        LOG(FATAL) << "no status field requested";
+    }
+    if (argc % 2 == 0) {
+        // Since |argc| counts argv[0], if |argc| is odd, then the number of
+        // command-line arguments is even.
+        Usage(argv);
+        LOG(FATAL) << "need even number of command-line arguments";
+    }
+
+    std::string status;
+    bool res = android::base::ReadFileToString("/proc/self/status", &status, true);
+    if (!res) {
+        PLOG(FATAL) << "could not read /proc/self/status";
+    }
+
+    std::map<std::string, std::string> fields;
+    std::vector<std::string> lines = android::base::Split(status, "\n");
+    for (const auto& line : lines) {
+        std::vector<std::string> tokens = android::base::Split(line, ":");
+        if (tokens.size() >= 2) {
+            std::string field = tokens[0];
+            std::string value = android::base::Trim(tokens[1]);
+            if (field.length() > 0) {
+                fields[field] = value;
+            }
+        }
+    }
+
+    bool test_fails = false;
+    size_t uargc = static_cast<size_t>(argc);  // |argc| >= 3.
+    for (size_t i = 1; i < static_cast<size_t>(argc); i = i + 2) {
+        std::string expected_value = argv[i + 1];
+        auto f = fields.find(argv[i]);
+        if (f != fields.end()) {
+            if (f->second != expected_value) {
+                LOG(ERROR) << "field '" << argv[i] << "' expected '" << expected_value
+                           << "', actual '" << f->second << "'";
+                test_fails = true;
+            }
+        } else {
+            LOG(WARNING) << "could not find field '" << argv[i] << "'";
+        }
+    }
+
+    return test_fails ? 1 : 0;
+}
diff --git a/init/test_service/test_service.rc b/init/test_service/test_service.rc
new file mode 100644
index 0000000..91e1a0f
--- /dev/null
+++ b/init/test_service/test_service.rc
@@ -0,0 +1,7 @@
+service test_service /system/bin/test_service CapAmb 0000000000003000
+    class main
+    user system
+    group system
+    capabilities NET_ADMIN NET_RAW
+    disabled
+    oneshot
diff --git a/init/ueventd.cpp b/init/ueventd.cpp
index 361b925..915afbd 100644
--- a/init/ueventd.cpp
+++ b/init/ueventd.cpp
@@ -60,9 +60,18 @@
     cb.func_log = selinux_klog_callback;
     selinux_set_callback(SELINUX_CB_LOG, cb);
 
-    std::string hardware = property_get("ro.hardware");
-
     ueventd_parse_config_file("/ueventd.rc");
+    ueventd_parse_config_file("/vendor/ueventd.rc");
+    ueventd_parse_config_file("/odm/ueventd.rc");
+
+    /*
+     * keep the current product name base configuration so
+     * we remain backwards compatible and allow it to override
+     * everything
+     * TODO: cleanup platform ueventd.rc to remove vendor specific
+     * device node entries (b/34968103)
+     */
+    std::string hardware = property_get("ro.hardware");
     ueventd_parse_config_file(android::base::StringPrintf("/ueventd.%s.rc", hardware.c_str()).c_str());
 
     device_init();
diff --git a/liblog/Android.bp b/liblog/Android.bp
index 747fcc8..310dbf4 100644
--- a/liblog/Android.bp
+++ b/liblog/Android.bp
@@ -15,13 +15,17 @@
 //
 
 liblog_sources = [
+    "config_read.c",
+    "config_write.c",
+    "local_logger.c",
     "log_event_list.c",
     "log_event_write.c",
-    "logger_write.c",
-    "config_write.c",
-    "logger_name.c",
-    "logger_lock.c",
     "log_ratelimit.cpp",
+    "logger_lock.c",
+    "logger_name.c",
+    "logger_read.c",
+    "logger_write.c",
+    "logprint.c",
 ]
 liblog_host_sources = [
     "fake_log_device.c",
@@ -29,15 +33,12 @@
 ]
 liblog_target_sources = [
     "event_tag_map.cpp",
-    "config_read.c",
     "log_time.cpp",
     "properties.c",
-    "logprint.c",
     "pmsg_reader.c",
     "pmsg_writer.c",
     "logd_reader.c",
     "logd_writer.c",
-    "logger_read.c",
 ]
 
 // Shared and static library for host and device
diff --git a/liblog/README b/liblog/README
index 610338c..40a39ad 100644
--- a/liblog/README
+++ b/liblog/README
@@ -108,6 +108,11 @@
 
        int android_log_destroy(android_log_context *ctx)
 
+       #include <log/log_frontend.h>
+
+       int android_set_log_frontend(int frontend_flag)
+       int android_get_log_frontend()
+
        Link with -llog
 
 DESCRIPTION
@@ -162,6 +167,13 @@
        when  opening  the  sub-log.    It  is  recommended  to  open  the  log
        ANDROID_LOG_RDONLY in these cases.
 
+       android_set_log_frontend() selects frontend filters. Argument is either
+       LOGGER_DEFAULT, LOGGER_LOGD, LOGGER_NULL or LOGGER_LOCAL. Log to logger
+       daemon for default or logd,  drop contents on floor,  or log into local
+       memory   respectively.          Both   android_set_log_frontend()   and
+       android_get_log_frontend()  return  the  current  frontend mask,   or a
+       negative errno for any problems.
+
 ERRORS
        If messages fail, a negative error code will be returned to the caller.
 
@@ -194,4 +206,4 @@
 
 
 
-                                  17 Oct 2016                        LIBLOG(3)
+                                  08 Feb 2017                        LIBLOG(3)
diff --git a/liblog/config_read.c b/liblog/config_read.c
index 1f54152..b9a281b 100644
--- a/liblog/config_read.c
+++ b/liblog/config_read.c
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <log/log_frontend.h>
+
 #include "config_read.h"
 #include "logger.h"
 
@@ -52,11 +54,35 @@
 }
 
 LIBLOG_HIDDEN void __android_log_config_read() {
-#if (FAKE_LOG_DEVICE == 0)
-    extern struct android_log_transport_read logdLoggerRead;
-    extern struct android_log_transport_read pmsgLoggerRead;
+    if (__android_log_frontend & LOGGER_LOCAL) {
+        extern struct android_log_transport_read localLoggerRead;
 
-    __android_log_add_transport(&__android_log_transport_read, &logdLoggerRead);
-    __android_log_add_transport(&__android_log_persist_read, &pmsgLoggerRead);
+        __android_log_add_transport(&__android_log_transport_read,
+                                    &localLoggerRead);
+    }
+
+#if (FAKE_LOG_DEVICE == 0)
+    if ((__android_log_frontend == LOGGER_DEFAULT) ||
+        (__android_log_frontend & LOGGER_LOGD)) {
+        extern struct android_log_transport_read logdLoggerRead;
+        extern struct android_log_transport_read pmsgLoggerRead;
+
+        __android_log_add_transport(&__android_log_transport_read,
+                                    &logdLoggerRead);
+        __android_log_add_transport(&__android_log_persist_read,
+                                    &pmsgLoggerRead);
+    }
 #endif
 }
+
+LIBLOG_HIDDEN void __android_log_config_read_close() {
+    struct android_log_transport_read *transport;
+    struct listnode *n;
+
+    read_transport_for_each_safe(transport, n, &__android_log_transport_read) {
+        list_remove(&transport->node);
+    }
+    read_transport_for_each_safe(transport, n, &__android_log_persist_read) {
+        list_remove(&transport->node);
+    }
+}
diff --git a/liblog/config_read.h b/liblog/config_read.h
index 49a3b75..892e80d 100644
--- a/liblog/config_read.h
+++ b/liblog/config_read.h
@@ -28,22 +28,31 @@
 
 #define read_transport_for_each(transp, transports)                         \
     for ((transp) = node_to_item((transports)->next,                        \
-                               struct android_log_transport_read, node);    \
-         ((transp) != node_to_item(transports,                              \
-                                 struct android_log_transport_read, node)); \
+                                 struct android_log_transport_read, node);  \
+         ((transp) != node_to_item((transports),                            \
+                                   struct android_log_transport_read,       \
+                                   node)) &&                                \
+         ((transp) != node_to_item((transp)->node.next,                     \
+                                   struct android_log_transport_read,       \
+                                   node));                                  \
          (transp) = node_to_item((transp)->node.next,                       \
-                               struct android_log_transport_read, node))    \
+                                 struct android_log_transport_read, node))
 
 #define read_transport_for_each_safe(transp, n, transports)                 \
     for ((transp) = node_to_item((transports)->next,                        \
-                               struct android_log_transport_read, node),    \
+                                 struct android_log_transport_read, node),  \
          (n) = (transp)->node.next;                                         \
-         ((transp) != node_to_item(transports,                              \
-                                 struct android_log_transport_read, node)); \
-         (transp) = node_to_item(n, struct android_log_transport_read, node), \
+         ((transp) != node_to_item((transports),                            \
+                                   struct android_log_transport_read,       \
+                                   node)) &&                                \
+         ((transp) != node_to_item((n), struct android_log_transport_read,  \
+                                   node));                                  \
+         (transp) = node_to_item((n), struct android_log_transport_read,    \
+                                 node),                                     \
          (n) = (transp)->node.next)
 
 LIBLOG_HIDDEN void __android_log_config_read();
+LIBLOG_HIDDEN void __android_log_config_read_close();
 
 __END_DECLS
 
diff --git a/liblog/config_write.c b/liblog/config_write.c
index d689f63..583dcff 100644
--- a/liblog/config_write.c
+++ b/liblog/config_write.c
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <log/log_frontend.h>
+
 #include "config_write.h"
 #include "logger.h"
 
@@ -52,15 +54,42 @@
 }
 
 LIBLOG_HIDDEN void __android_log_config_write() {
+    if (__android_log_frontend & LOGGER_LOCAL) {
+        extern struct android_log_transport_write localLoggerWrite;
+
+        __android_log_add_transport(&__android_log_transport_write,
+                                    &localLoggerWrite);
+    }
+
+    if ((__android_log_frontend == LOGGER_DEFAULT) ||
+        (__android_log_frontend & LOGGER_LOGD)) {
 #if (FAKE_LOG_DEVICE == 0)
-    extern struct android_log_transport_write logdLoggerWrite;
-    extern struct android_log_transport_write pmsgLoggerWrite;
+        extern struct android_log_transport_write logdLoggerWrite;
+        extern struct android_log_transport_write pmsgLoggerWrite;
 
-    __android_log_add_transport(&__android_log_transport_write, &logdLoggerWrite);
-    __android_log_add_transport(&__android_log_persist_write, &pmsgLoggerWrite);
+        __android_log_add_transport(&__android_log_transport_write,
+                                    &logdLoggerWrite);
+        __android_log_add_transport(&__android_log_persist_write,
+                                    &pmsgLoggerWrite);
 #else
-    extern struct android_log_transport_write fakeLoggerWrite;
+        extern struct android_log_transport_write fakeLoggerWrite;
 
-    __android_log_add_transport(&__android_log_transport_write, &fakeLoggerWrite);
+        __android_log_add_transport(&__android_log_transport_write,
+                                    &fakeLoggerWrite);
 #endif
+    }
+}
+
+LIBLOG_HIDDEN void __android_log_config_write_close() {
+    struct android_log_transport_write *transport;
+    struct listnode *n;
+
+    write_transport_for_each_safe(transport, n, &__android_log_transport_write) {
+        transport->logMask = 0;
+        list_remove(&transport->node);
+    }
+    write_transport_for_each_safe(transport, n, &__android_log_persist_write) {
+        transport->logMask = 0;
+        list_remove(&transport->node);
+    }
 }
diff --git a/liblog/config_write.h b/liblog/config_write.h
index 3b01a9a..8825411 100644
--- a/liblog/config_write.h
+++ b/liblog/config_write.h
@@ -29,21 +29,30 @@
 #define write_transport_for_each(transp, transports)                         \
     for ((transp) = node_to_item((transports)->next,                         \
                                  struct android_log_transport_write, node);  \
-         ((transp) != node_to_item(transports,                               \
-                                 struct android_log_transport_write, node)); \
+         ((transp) != node_to_item((transports),                             \
+                                   struct android_log_transport_write,       \
+                                   node)) &&                                 \
+         ((transp) != node_to_item((transp)->node.next,                      \
+                                   struct android_log_transport_write,       \
+                                   node));                                   \
          (transp) = node_to_item((transp)->node.next,                        \
-                                 struct android_log_transport_write, node))  \
+                                 struct android_log_transport_write, node))
 
 #define write_transport_for_each_safe(transp, n, transports)                 \
     for ((transp) = node_to_item((transports)->next,                         \
                                  struct android_log_transport_write, node),  \
          (n) = (transp)->node.next;                                          \
-         ((transp) != node_to_item(transports,                               \
-                                   struct android_log_transport_write, node)); \
-         (transp) = node_to_item(n, struct android_log_transport_write, node), \
+         ((transp) != node_to_item((transports),                             \
+                                   struct android_log_transport_write,       \
+                                   node)) &&                                 \
+         ((transp) != node_to_item((n), struct android_log_transport_write,  \
+                                   node));                                   \
+         (transp) = node_to_item((n), struct android_log_transport_write,    \
+                                 node),                                      \
          (n) = (transp)->node.next)
 
 LIBLOG_HIDDEN void __android_log_config_write();
+LIBLOG_HIDDEN void __android_log_config_write_close();
 
 __END_DECLS
 
diff --git a/liblog/fake_log_device.c b/liblog/fake_log_device.c
index 957129e..1d7a157 100644
--- a/liblog/fake_log_device.c
+++ b/liblog/fake_log_device.c
@@ -612,7 +612,12 @@
 
 bail:
     unlock();
-    return vector[0].iov_len + vector[1].iov_len + vector[2].iov_len;
+    int len = 0;
+    for (i = 0; i < count; ++i) {
+       len += vector[i].iov_len;
+    }
+    return len;
+
 error:
     unlock();
     return -1;
diff --git a/liblog/fake_writer.c b/liblog/fake_writer.c
index dab8bc5..2350673 100644
--- a/liblog/fake_writer.c
+++ b/liblog/fake_writer.c
@@ -46,9 +46,19 @@
     int i;
 
     for (i = 0; i < LOG_ID_MAX; i++) {
-        char buf[sizeof("/dev/log_security")];
+        /*
+         * Known maximum size string, plus an 8 character margin to deal with
+         * possible independent changes to android_log_id_to_name().
+         */
+        char buf[sizeof("/dev/log_security") + 8];
+        if (logFds[i] >= 0) {
+            continue;
+        }
         snprintf(buf, sizeof(buf), "/dev/log_%s", android_log_id_to_name(i));
         logFds[i] = fakeLogOpen(buf, O_WRONLY);
+        if (logFds[i] < 0) {
+            fprintf(stderr, "fakeLogOpen(%s, O_WRONLY) failed\n", buf);
+        }
     }
     return 0;
 }
@@ -66,16 +76,28 @@
                       struct iovec *vec, size_t nr)
 {
     ssize_t ret;
-    int logFd;
+    size_t i;
+    int logFd, len;
 
     if (/*(int)log_id >= 0 &&*/ (int)log_id >= (int)LOG_ID_MAX) {
-        return -EBADF;
+        return -EINVAL;
+    }
+
+    len = 0;
+    for (i = 0; i < nr; ++i) {
+        len += vec[i].iov_len;
+    }
+
+    if (len > LOGGER_ENTRY_MAX_PAYLOAD) {
+        len = LOGGER_ENTRY_MAX_PAYLOAD;
     }
 
     logFd = logFds[(int)log_id];
     ret = TEMP_FAILURE_RETRY(fakeLogWritev(logFd, vec, nr));
     if (ret < 0) {
         ret = -errno;
+    } else if (ret > len) {
+        ret = len;
     }
 
     return ret;
diff --git a/liblog/include/log/log_frontend.h b/liblog/include/log/log_frontend.h
new file mode 100644
index 0000000..9527779
--- /dev/null
+++ b/liblog/include/log/log_frontend.h
@@ -0,0 +1,34 @@
+/*
+**
+** Copyright 2017, The Android Open Source Project
+**
+** This file is dual licensed.  It may be redistributed and/or modified
+** under the terms of the Apache 2.0 License OR version 2 of the GNU
+** General Public License.
+*/
+
+#ifndef _LIBS_LOG_FRONTEND_H
+#define _LIBS_LOG_FRONTEND_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Logging frontends, bit mask to select features. Function returns selection.
+ */
+#define LOGGER_DEFAULT 0x0
+#define LOGGER_LOGD    0x1
+#define LOGGER_KERNEL  0x2 /* Reserved/Deprecated */
+#define LOGGER_NULL    0x4 /* Does not release resources of other selections */
+#define LOGGER_LOCAL   0x8 /* logs sent to local memory */
+
+/* Both return the selected frontend flag mask, or negative errno */
+int android_set_log_frontend(int frontend_flag);
+int android_get_log_frontend();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LIBS_LOG_FRONTEND_H */
diff --git a/liblog/include/log/log_radio.h b/liblog/include/log/log_radio.h
index 30a73f2..430e522 100644
--- a/liblog/include/log/log_radio.h
+++ b/liblog/include/log/log_radio.h
@@ -38,6 +38,10 @@
 
 /* --------------------------------------------------------------------- */
 
+#ifndef __predict_false
+#define __predict_false(exp) __builtin_expect((exp) != 0, 0)
+#endif
+
 /*
  * Simplified macro to send a verbose radio log message using current LOG_TAG.
  */
diff --git a/liblog/include/log/log_read.h b/liblog/include/log/log_read.h
index 5b5eebc..6a44b56 100644
--- a/liblog/include/log/log_read.h
+++ b/liblog/include/log/log_read.h
@@ -251,7 +251,11 @@
 #define ANDROID_LOG_WRONLY   O_WRONLY
 #define ANDROID_LOG_RDWR     O_RDWR
 #define ANDROID_LOG_ACCMODE  O_ACCMODE
+#ifndef O_NONBLOCK
+#define ANDROID_LOG_NONBLOCK 0x00000800
+#else
 #define ANDROID_LOG_NONBLOCK O_NONBLOCK
+#endif
 #if __ANDROID_USE_LIBLOG_READER_INTERFACE > 2
 #define ANDROID_LOG_WRAP     0x40000000 /* Block until buffer about to wrap */
 #define ANDROID_LOG_WRAP_DEFAULT_TIMEOUT 7200 /* 2 hour default */
diff --git a/liblog/include/log/log_system.h b/liblog/include/log/log_system.h
index 8c1ec96..394a106 100644
--- a/liblog/include/log/log_system.h
+++ b/liblog/include/log/log_system.h
@@ -36,6 +36,10 @@
 #endif
 #endif
 
+#ifndef __predict_false
+#define __predict_false(exp) __builtin_expect((exp) != 0, 0)
+#endif
+
 /*
  * Simplified macro to send a verbose system log message using current LOG_TAG.
  */
diff --git a/liblog/local_logger.c b/liblog/local_logger.c
new file mode 100644
index 0000000..d504342
--- /dev/null
+++ b/liblog/local_logger.c
@@ -0,0 +1,556 @@
+/*
+ * Copyright (C) 2017 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 <pthread.h>
+#if !defined(__MINGW32__)
+#include <pwd.h>
+#endif
+#include <sched.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <log/uio.h>
+
+#include <cutils/list.h> /* template, no library dependency */
+#include <log/log_frontend.h>
+#include <private/android_filesystem_config.h>
+#include <private/android_logger.h>
+#include <system/thread_defs.h>
+
+#include "config_read.h"
+#include "config_write.h"
+#include "log_portability.h"
+#include "logger.h"
+
+static const char baseServiceName[] = "android.logd";
+
+static int writeToLocalInit();
+static int writeToLocalAvailable(log_id_t logId);
+static void writeToLocalReset();
+static int writeToLocalWrite(log_id_t logId, struct timespec *ts,
+                             struct iovec *vec, size_t nr);
+
+LIBLOG_HIDDEN struct android_log_transport_write localLoggerWrite = {
+    .node = { &localLoggerWrite.node, &localLoggerWrite.node },
+    .context.private = NULL,
+    .name = "local",
+    .available = writeToLocalAvailable,
+    .open = writeToLocalInit,
+    .close = writeToLocalReset,
+    .write = writeToLocalWrite,
+};
+
+static int writeToLocalVersion(struct android_log_logger *logger,
+                               struct android_log_transport_context *transp);
+static int writeToLocalRead(struct android_log_logger_list *logger_list,
+                            struct android_log_transport_context *transp,
+                            struct log_msg *log_msg);
+static int writeToLocalPoll(struct android_log_logger_list *logger_list,
+                            struct android_log_transport_context *transp);
+static void writeToLocalClose(struct android_log_logger_list *logger_list,
+                              struct android_log_transport_context *transp);
+static int writeToLocalClear(struct android_log_logger *logger,
+                             struct android_log_transport_context *transp);
+static ssize_t writeToLocalGetSize(
+        struct android_log_logger *logger,
+        struct android_log_transport_context *transp);
+static ssize_t writeToLocalSetSize(
+        struct android_log_logger *logger,
+        struct android_log_transport_context *transp __unused,
+        size_t size);
+static ssize_t writeToLocalGetReadbleSize(
+        struct android_log_logger *logger,
+        struct android_log_transport_context *transp);
+
+struct android_log_transport_read localLoggerRead = {
+    .node = { &localLoggerRead.node, &localLoggerRead.node },
+    .name = "local",
+    .available = writeToLocalAvailable,
+    .version = writeToLocalVersion,
+    .read = writeToLocalRead,
+    .poll = writeToLocalPoll,
+    .close = writeToLocalClose,
+    .clear = writeToLocalClear,
+    .getSize = writeToLocalGetSize,
+    .setSize = writeToLocalSetSize,
+    .getReadableSize = writeToLocalGetReadbleSize,
+    .getPrune = NULL,
+    .setPrune = NULL,
+    .getStats = NULL,
+};
+
+struct LogBufferElement {
+  struct listnode node;
+  log_id_t logId;
+  pid_t tid;
+  log_time timestamp;
+  unsigned short len;
+  char msg[];
+};
+
+static const size_t MAX_SIZE_DEFAULT = 32768;
+
+/*
+ * Number of log buffers we support with the following assumption:
+ *  . . .
+ *   LOG_ID_SECURITY = 5, // security logs go to the system logs only
+ *   LOG_ID_KERNEL = 6,   // place last, third-parties can not use it
+ *   LOG_ID_MAX
+ * } log_id_t;
+ *
+ * Confirm the following should <log/log_id.h> be adjusted in the future.
+ */
+#define NUMBER_OF_LOG_BUFFERS ((LOG_ID_SECURITY == (LOG_ID_MAX - 2)) ? \
+                                  LOG_ID_SECURITY : \
+                                  LOG_ID_KERNEL)
+#define BLOCK_LOG_BUFFERS(id) (((id) == LOG_ID_SECURITY) || \
+                               ((id) == LOG_ID_KERNEL))
+
+static struct LogBuffer {
+  struct listnode head;
+  pthread_rwlock_t listLock;
+  char *serviceName; /* Also indicates ready by having a value */
+  /* Order and proximity important for memset */
+  size_t number[NUMBER_OF_LOG_BUFFERS];         /* clear memset          */
+  size_t size[NUMBER_OF_LOG_BUFFERS];           /* clear memset          */
+  size_t totalSize[NUMBER_OF_LOG_BUFFERS];      /* init memset           */
+  size_t maxSize[NUMBER_OF_LOG_BUFFERS];        /* init MAX_SIZE_DEFAULT */
+  struct listnode *last[NUMBER_OF_LOG_BUFFERS]; /* init &head            */
+} logbuf = {
+  .head = { &logbuf.head, &logbuf.head },
+  .listLock = PTHREAD_RWLOCK_INITIALIZER,
+};
+
+static void LogBufferInit(struct LogBuffer *log) {
+  size_t i;
+
+  pthread_rwlock_wrlock(&log->listLock);
+  list_init(&log->head);
+  memset(log->number, 0,
+    sizeof(log->number) + sizeof(log->size) + sizeof(log->totalSize));
+  for (i = 0; i < NUMBER_OF_LOG_BUFFERS; ++i) {
+    log->maxSize[i] = MAX_SIZE_DEFAULT;
+    log->last[i] = &log->head;
+  }
+#ifdef __BIONIC__
+  asprintf(&log->serviceName, "%s@%d:%d", baseServiceName,
+           __android_log_uid(), getpid());
+#else
+  char buffer[sizeof(baseServiceName) + 1 + 5 + 1 + 5 + 8];
+  snprintf(buffer, sizeof(buffer), "%s@%d:%d", baseServiceName,
+                                   __android_log_uid(), getpid());
+  log->serviceName = strdup(buffer);
+#endif
+  pthread_rwlock_unlock(&log->listLock);
+}
+
+static void LogBufferClear(struct LogBuffer *log) {
+  size_t i;
+  struct listnode *node;
+
+  pthread_rwlock_wrlock(&log->listLock);
+  memset(log->number, 0, sizeof(log->number) + sizeof(log->size));
+  for (i = 0; i < NUMBER_OF_LOG_BUFFERS; ++i) {
+    log->last[i] = &log->head;
+  }
+  while ((node = list_head(&log->head)) != &log->head) {
+    struct LogBufferElement *element;
+
+    element = node_to_item(node, struct LogBufferElement, node);
+    list_remove(node);
+    free(element);
+  }
+  pthread_rwlock_unlock(&log->listLock);
+}
+
+static inline void LogBufferFree(struct LogBuffer *log) {
+  pthread_rwlock_wrlock(&log->listLock);
+  free(log->serviceName);
+  log->serviceName = NULL;
+  pthread_rwlock_unlock(&log->listLock);
+  LogBufferClear(log);
+}
+
+static int LogBufferLog(struct LogBuffer *log,
+                        struct LogBufferElement *element) {
+  log_id_t logId = element->logId;
+
+  pthread_rwlock_wrlock(&log->listLock);
+  log->number[logId]++;
+  log->size[logId] += element->len;
+  log->totalSize[logId] += element->len;
+  /* prune entry(s) until enough space is available */
+  if (log->last[logId] == &log->head) {
+    log->last[logId] = list_tail(&log->head);
+  }
+  while (log->size[logId] > log->maxSize[logId]) {
+    struct listnode *node = log->last[logId];
+    struct LogBufferElement *e;
+    struct android_log_logger_list *logger_list;
+
+    e = node_to_item(node, struct LogBufferElement, node);
+    log->number[logId]--;
+    log->size[logId] -= e->len;
+    logger_list_rdlock();
+    logger_list_for_each(logger_list) {
+      struct android_log_transport_context *transp;
+
+      transport_context_for_each(transp, logger_list) {
+        if ((transp->transport == &localLoggerRead) &&
+            (transp->context.node == node)) {
+          if (node == &log->head) {
+            transp->context.node = &log->head;
+          } else {
+            transp->context.node = node->next;
+          }
+        }
+      }
+    }
+    logger_list_unlock();
+    if (node != &log->head) {
+      log->last[logId] = node->prev;
+    }
+    list_remove(node);
+    free(e);
+  }
+  /* add entry to list */
+  list_add_head(&log->head, &element->node);
+  /* ToDo: wake up all readers */
+  pthread_rwlock_unlock(&log->listLock);
+
+  return element->len;
+}
+
+/*
+ * return zero if permitted to log directly to logd,
+ * return 1 if binder server started and
+ * return negative error number if failed to start binder server.
+ */
+static int writeToLocalInit() {
+  pthread_attr_t attr;
+  struct LogBuffer *log;
+
+  if (writeToLocalAvailable(LOG_ID_MAIN) < 0) {
+    return -EPERM;
+  }
+
+  log = &logbuf;
+  if (!log->serviceName) {
+      LogBufferInit(log);
+  }
+
+  if (!log->serviceName) {
+    LogBufferFree(log);
+    return -ENOMEM;
+  }
+
+  return EPERM; /* successful local-only logging */
+}
+
+static void writeToLocalReset() {
+  LogBufferFree(&logbuf);
+}
+
+static int writeToLocalAvailable(log_id_t logId) {
+#if !defined(__MINGW32__)
+  uid_t uid;
+#endif
+
+  if ((logId >= NUMBER_OF_LOG_BUFFERS) || BLOCK_LOG_BUFFERS(logId)) {
+    return -EINVAL;
+  }
+
+  /* Android hard coded permitted, system goes to logd */
+#if !defined(__MINGW32__)
+  if (__android_log_frontend == LOGGER_DEFAULT) {
+    uid = __android_log_uid();
+    if ((uid < AID_APP) && (getpwuid(uid) != NULL)) {
+      return -EPERM;
+    }
+  }
+#endif
+
+  /* ToDo: Ask package manager for LOGD permissions */
+  /* Assume we do _not_ have permissions to go to LOGD, so must go local */
+  return 0;
+}
+
+static int writeToLocalWrite(log_id_t logId, struct timespec *ts,
+                             struct iovec *vec, size_t nr) {
+  size_t len, i;
+  struct LogBufferElement *element;
+
+  if ((logId >= NUMBER_OF_LOG_BUFFERS) || BLOCK_LOG_BUFFERS(logId)) {
+    return -EINVAL;
+  }
+
+  len = 0;
+  for (i = 0; i < nr; ++i) {
+    len += vec[i].iov_len;
+  }
+
+  if (len > LOGGER_ENTRY_MAX_PAYLOAD) {
+    len = LOGGER_ENTRY_MAX_PAYLOAD;
+  }
+  element = (struct LogBufferElement *)calloc(1,
+      sizeof(struct LogBufferElement) + len + 1);
+  if (!element) {
+    return errno ? -errno : -ENOMEM;
+  }
+  element->timestamp.tv_sec = ts->tv_sec;
+  element->timestamp.tv_nsec = ts->tv_nsec;
+#ifdef __BIONIC__
+  element->tid = gettid();
+#else
+  element->tid = getpid();
+#endif
+  element->logId = logId;
+  element->len = len;
+
+  char *cp = element->msg;
+  for (i = 0; i < nr; ++i) {
+    size_t iov_len = vec[i].iov_len;
+    if (iov_len > len) {
+      iov_len = len;
+    }
+    memcpy(cp, vec[i].iov_base, iov_len);
+    len -= iov_len;
+    if (len == 0) {
+      break;
+    }
+    cp += iov_len;
+  }
+
+  return LogBufferLog(&logbuf, element);
+}
+
+static int writeToLocalVersion(
+        struct android_log_logger *logger __unused,
+        struct android_log_transport_context *transp __unused) {
+  return 3;
+}
+
+/* within reader lock, serviceName already validated */
+static struct listnode *writeToLocalNode(
+        struct android_log_logger_list *logger_list,
+        struct android_log_transport_context *transp) {
+  struct listnode *node;
+  unsigned logMask;
+  unsigned int tail;
+
+  node = transp->context.node;
+  if (node) {
+    return node;
+  }
+
+  if (!logger_list->tail) {
+    return transp->context.node = &logbuf.head;
+  }
+
+  logMask = transp->logMask;
+  tail = logger_list->tail;
+
+  for (node = list_head(&logbuf.head); node != &logbuf.head; node = node->next) {
+    struct LogBufferElement *element;
+    log_id_t logId;
+
+    element = node_to_item(node, struct LogBufferElement, node);
+    logId = element->logId;
+
+    if ((logMask & (1 << logId)) && !--tail) {
+      node = node->next;
+      break;
+    }
+  }
+  return transp->context.node = node;
+}
+
+static int writeToLocalRead(
+        struct android_log_logger_list *logger_list,
+        struct android_log_transport_context *transp,
+        struct log_msg *log_msg) {
+  int ret;
+  struct listnode *node;
+  unsigned logMask;
+
+  pthread_rwlock_rdlock(&logbuf.listLock);
+  if (!logbuf.serviceName) {
+    pthread_rwlock_unlock(&logbuf.listLock);
+    return (logger_list->mode & ANDROID_LOG_NONBLOCK) ? -ENODEV : 0;
+  }
+
+  logMask = transp->logMask;
+
+  node = writeToLocalNode(logger_list, transp);
+
+  ret = 0;
+
+  while (node != list_head(&logbuf.head)) {
+    struct LogBufferElement *element;
+    log_id_t logId;
+
+    node = node->prev;
+    element = node_to_item(node, struct LogBufferElement, node);
+    logId = element->logId;
+
+    if (logMask & (1 << logId)) {
+      ret = log_msg->entry_v3.len = element->len;
+      log_msg->entry_v3.hdr_size = sizeof(log_msg->entry_v3);
+      log_msg->entry_v3.pid = getpid();
+      log_msg->entry_v3.tid = element->tid;
+      log_msg->entry_v3.sec = element->timestamp.tv_sec;
+      log_msg->entry_v3.nsec = element->timestamp.tv_nsec;
+      log_msg->entry_v3.lid = logId;
+      memcpy(log_msg->entry_v3.msg, element->msg, ret);
+      ret += log_msg->entry_v3.hdr_size;
+      break;
+    }
+  }
+
+  transp->context.node = node;
+
+  /* ToDo: if blocking, and no entry, put reader to sleep */
+  pthread_rwlock_unlock(&logbuf.listLock);
+  return ret;
+}
+
+static int writeToLocalPoll(
+        struct android_log_logger_list *logger_list,
+        struct android_log_transport_context *transp) {
+  int ret = (logger_list->mode & ANDROID_LOG_NONBLOCK) ? -ENODEV : 0;
+
+  pthread_rwlock_rdlock(&logbuf.listLock);
+
+  if (logbuf.serviceName) {
+    unsigned logMask = transp->logMask;
+    struct listnode *node = writeToLocalNode(logger_list, transp);
+
+    ret = (node != list_head(&logbuf.head));
+    if (ret) {
+      do {
+        ret = !!(logMask & (1 << (node_to_item(node->prev,
+                                               struct LogBufferElement,
+                                               node))->logId));
+      } while (!ret && ((node = node->prev) != list_head(&logbuf.head)));
+    }
+
+    transp->context.node = node;
+  }
+
+  pthread_rwlock_unlock(&logbuf.listLock);
+
+  return ret;
+}
+
+static void writeToLocalClose(
+        struct android_log_logger_list *logger_list __unused,
+        struct android_log_transport_context *transp) {
+  pthread_rwlock_wrlock(&logbuf.listLock);
+  transp->context.node = list_head(&logbuf.head);
+  pthread_rwlock_unlock(&logbuf.listLock);
+}
+
+static int writeToLocalClear(
+        struct android_log_logger *logger,
+        struct android_log_transport_context *unused __unused) {
+  log_id_t logId = logger->logId;
+  struct listnode *node, *n;
+
+  if ((logId >= NUMBER_OF_LOG_BUFFERS) || BLOCK_LOG_BUFFERS(logId)) {
+    return -EINVAL;
+  }
+
+  pthread_rwlock_wrlock(&logbuf.listLock);
+  logbuf.number[logId] = 0;
+  logbuf.last[logId] = &logbuf.head;
+  list_for_each_safe(node, n, &logbuf.head) {
+    struct LogBufferElement *element;
+    element = node_to_item(node, struct LogBufferElement, node);
+
+    if (logId == element->logId) {
+      struct android_log_logger_list *logger_list;
+
+      logger_list_rdlock();
+      logger_list_for_each(logger_list) {
+        struct android_log_transport_context *transp;
+
+        transport_context_for_each(transp, logger_list) {
+          if ((transp->transport == &localLoggerRead) &&
+              (transp->context.node == node)) {
+            transp->context.node = node->next;
+          }
+        }
+      }
+      logger_list_unlock();
+      list_remove(node);
+      free(element);
+    }
+  }
+
+  pthread_rwlock_unlock(&logbuf.listLock);
+
+  return 0;
+}
+
+static ssize_t writeToLocalGetSize(
+        struct android_log_logger *logger,
+        struct android_log_transport_context *transp __unused) {
+  ssize_t ret = -EINVAL;
+  log_id_t logId = logger->logId;
+
+  if ((logId < NUMBER_OF_LOG_BUFFERS) && !BLOCK_LOG_BUFFERS(logId)) {
+    pthread_rwlock_rdlock(&logbuf.listLock);
+    ret = logbuf.maxSize[logId];
+    pthread_rwlock_unlock(&logbuf.listLock);
+  }
+
+  return ret;
+}
+
+static ssize_t writeToLocalSetSize(
+        struct android_log_logger *logger,
+        struct android_log_transport_context *transp __unused,
+        size_t size) {
+  ssize_t ret = -EINVAL;
+
+  if ((size > LOGGER_ENTRY_MAX_LEN) || (size < (4 * 1024 * 1024))) {
+    log_id_t logId = logger->logId;
+    if ((logId < NUMBER_OF_LOG_BUFFERS) || !BLOCK_LOG_BUFFERS(logId)) {
+      pthread_rwlock_wrlock(&logbuf.listLock);
+      ret = logbuf.maxSize[logId] = size;
+      pthread_rwlock_unlock(&logbuf.listLock);
+    }
+  }
+
+  return ret;
+}
+
+static ssize_t writeToLocalGetReadbleSize(
+        struct android_log_logger *logger,
+        struct android_log_transport_context *transp __unused) {
+  ssize_t ret = -EINVAL;
+  log_id_t logId = logger->logId;
+
+  if ((logId < NUMBER_OF_LOG_BUFFERS) && !BLOCK_LOG_BUFFERS(logId)) {
+    pthread_rwlock_rdlock(&logbuf.listLock);
+    ret = logbuf.serviceName ? (ssize_t)logbuf.size[logId] : -EBADF;
+    pthread_rwlock_unlock(&logbuf.listLock);
+  }
+
+  return ret;
+}
diff --git a/liblog/logd_reader.c b/liblog/logd_reader.c
index ccc7da8..9411f36 100644
--- a/liblog/logd_reader.c
+++ b/liblog/logd_reader.c
@@ -91,7 +91,7 @@
 
 static int logdAvailable(log_id_t logId)
 {
-    if (logId > LOG_ID_KERNEL) {
+    if (logId >= LOG_ID_MAX || logId == LOG_ID_KERNEL) {
         return -EINVAL;
     }
     if (logId == LOG_ID_SECURITY) {
diff --git a/liblog/logger.h b/liblog/logger.h
index d332c03..d94cd14 100644
--- a/liblog/logger.h
+++ b/liblog/logger.h
@@ -99,6 +99,7 @@
 };
 
 struct android_log_logger_list {
+  struct listnode node;
   struct listnode logger;
   struct listnode transport;
   int mode;
@@ -146,6 +147,41 @@
          (logp) = node_to_item((logp)->node.next,                   \
                              struct android_log_logger, node))
 
+/*
+ *    Global list of log readers.
+ *
+ * Usage case: search out transport contexts for all readers
+ */
+
+LIBLOG_HIDDEN struct listnode __android_log_readers;
+
+#if defined(_WIN32)
+#define logger_list_rdlock()
+#define logger_list_wrlock()
+#define logger_list_unlock()
+#else
+LIBLOG_HIDDEN pthread_rwlock_t __android_log_readers_lock;
+
+#define logger_list_rdlock() pthread_rwlock_rdlock(&__android_log_readers_lock)
+#define logger_list_wrlock() pthread_rwlock_wrlock(&__android_log_readers_lock)
+#define logger_list_unlock() pthread_rwlock_unlock(&__android_log_readers_lock)
+#endif
+
+/* Must be called with logger_list_rdlock() or logger_list_wrlock() held */
+#define logger_list_for_each(logger_list)                              \
+    for ((logger_list) = node_to_item(&__android_log_readers,          \
+                                      struct android_log_logger_list,  \
+                                      node);                           \
+         (logger_list) != node_to_item(&__android_log_readers,         \
+                                       struct android_log_logger_list, \
+                                       node) &&                        \
+         (logger_list) != node_to_item((logger_list)->node.next,       \
+                                       struct android_log_logger_list, \
+                                       node);                          \
+         (logger_list) = node_to_item((logger_list)->node.next,        \
+                                      struct android_log_logger_list,  \
+                                      node))
+
 /* OS specific dribs and drabs */
 
 #if defined(_WIN32)
@@ -160,6 +196,8 @@
 LIBLOG_HIDDEN int __android_log_trylock();
 LIBLOG_HIDDEN void __android_log_unlock();
 
+LIBLOG_HIDDEN int __android_log_frontend;
+
 __END_DECLS
 
 #endif /* _LIBLOG_LOGGER_H__ */
diff --git a/liblog/logger_read.c b/liblog/logger_read.c
index c3cb7ad..7e50a23 100644
--- a/liblog/logger_read.c
+++ b/liblog/logger_read.c
@@ -228,6 +228,13 @@
     LOGGER_LIST_FUNCTION(logger_list, -ENODEV, setPrune, buf, len);
 }
 
+LIBLOG_HIDDEN struct listnode __android_log_readers =
+    { &__android_log_readers, &__android_log_readers };
+#if !defined(_WIN32)
+LIBLOG_HIDDEN pthread_rwlock_t __android_log_readers_lock =
+    PTHREAD_RWLOCK_INITIALIZER;
+#endif
+
 LIBLOG_ABI_PUBLIC struct logger_list *android_logger_list_alloc(
         int mode,
         unsigned int tail,
@@ -246,6 +253,10 @@
     logger_list->tail = tail;
     logger_list->pid = pid;
 
+    logger_list_wrlock();
+    list_add_tail(&__android_log_readers, &logger_list->node);
+    logger_list_unlock();
+
     return (struct logger_list *)logger_list;
 }
 
@@ -267,6 +278,10 @@
     logger_list->start = start;
     logger_list->pid = pid;
 
+    logger_list_wrlock();
+    list_add_tail(&__android_log_readers, &logger_list->node);
+    logger_list_unlock();
+
     return (struct logger_list *)logger_list;
 }
 
@@ -502,6 +517,10 @@
         return;
     }
 
+    logger_list_wrlock();
+    list_remove(&logger_list_internal->node);
+    logger_list_unlock();
+
     while (!list_empty(&logger_list_internal->transport)) {
         struct listnode *node = list_head(&logger_list_internal->transport);
         struct android_log_transport_context *transp =
diff --git a/liblog/logger_write.c b/liblog/logger_write.c
index 2599a53..e149e68 100644
--- a/liblog/logger_write.c
+++ b/liblog/logger_write.c
@@ -25,9 +25,11 @@
 #endif
 
 #include <log/event_tag_map.h>
+#include <log/log_frontend.h>
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
+#include "config_read.h" /* __android_log_config_read_close() definition */
 #include "config_write.h"
 #include "log_portability.h"
 #include "logger.h"
@@ -170,6 +172,8 @@
         }
     }
 
+    __android_log_config_write_close();
+
 #if defined(__ANDROID__)
     /*
      * Additional risk here somewhat mitigated by immediately unlock flushing
@@ -618,3 +622,87 @@
 
     return write_to_log(LOG_ID_SECURITY, vec, 4);
 }
+
+static int __write_to_log_null(log_id_t log_id, struct iovec* vec, size_t nr)
+{
+    size_t len, i;
+
+    if ((log_id < LOG_ID_MIN) || (log_id >= LOG_ID_MAX)) {
+        return -EINVAL;
+    }
+
+    for (len = i = 0; i < nr; ++i) {
+        len += vec[i].iov_len;
+    }
+    if (!len) {
+        return -EINVAL;
+    }
+    return len;
+}
+
+/* Following functions need access to our internal write_to_log status */
+
+LIBLOG_HIDDEN int __android_log_frontend;
+
+LIBLOG_ABI_PUBLIC int android_set_log_frontend(int frontend_flag)
+{
+    int retval;
+
+    if (frontend_flag < 0) {
+        return -EINVAL;
+    }
+
+    retval = LOGGER_NULL;
+
+    __android_log_lock();
+
+    if (frontend_flag & LOGGER_NULL) {
+        write_to_log = __write_to_log_null;
+
+        __android_log_unlock();
+
+        return retval;
+    }
+
+    __android_log_frontend &= LOGGER_LOCAL | LOGGER_LOGD;
+
+    frontend_flag &= LOGGER_LOCAL | LOGGER_LOGD;
+
+    if (__android_log_frontend != frontend_flag) {
+        __android_log_frontend = frontend_flag;
+        __android_log_config_write_close();
+        __android_log_config_read_close();
+
+        write_to_log = __write_to_log_init;
+    /* generically we only expect these two values for write_to_log */
+    } else if ((write_to_log != __write_to_log_init) &&
+               (write_to_log != __write_to_log_daemon)) {
+        write_to_log = __write_to_log_init;
+    }
+
+    retval = __android_log_frontend;
+
+    __android_log_unlock();
+
+    return retval;
+}
+
+LIBLOG_ABI_PUBLIC int android_get_log_frontend()
+{
+    int ret = LOGGER_DEFAULT;
+
+    __android_log_lock();
+    if (write_to_log == __write_to_log_null) {
+        ret = LOGGER_NULL;
+    } else {
+        __android_log_frontend &= LOGGER_LOCAL | LOGGER_LOGD;
+        ret = __android_log_frontend;
+        if ((write_to_log != __write_to_log_init) &&
+            (write_to_log != __write_to_log_daemon)) {
+            ret = -EINVAL;
+        }
+    }
+    __android_log_unlock();
+
+    return ret;
+}
diff --git a/liblog/logprint.c b/liblog/logprint.c
index 18af9de..e61850d 100644
--- a/liblog/logprint.c
+++ b/liblog/logprint.c
@@ -16,13 +16,20 @@
 */
 
 #define _GNU_SOURCE /* for asprintf */
+#ifndef __MINGW32__
+#define HAVE_STRSEP
+#endif
 
-#include <arpa/inet.h>
+//#ifndef __MINGW32__
+//#include <arpa/inet.h>
+//#endif
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
 #include <inttypes.h>
+#ifndef __MINGW32__
 #include <pwd.h>
+#endif
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
@@ -40,6 +47,10 @@
 #define MS_PER_NSEC 1000000
 #define US_PER_NSEC 1000
 
+#ifndef MIN
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
 typedef struct FilterInfo_t {
     char *mTag;
     android_LogPriority mPri;
@@ -216,7 +227,11 @@
     p_ret->year_output = false;
     p_ret->zone_output = false;
     p_ret->epoch_output = false;
+#ifdef __ANDROID__
     p_ret->monotonic_output = android_log_clockid() == CLOCK_MONOTONIC;
+#else
+    p_ret->monotonic_output = false;
+#endif
     p_ret->uid_output = false;
     p_ret->descriptive_output = false;
     descriptive_output = false;
@@ -322,6 +337,7 @@
     else if (strcmp(formatString, "monotonic") == 0) format = FORMAT_MODIFIER_MONOTONIC;
     else if (strcmp(formatString, "uid") == 0) format = FORMAT_MODIFIER_UID;
     else if (strcmp(formatString, "descriptive") == 0) format = FORMAT_MODIFIER_DESCRIPT;
+#ifndef __MINGW32__
     else {
         extern char *tzname[2];
         static const char gmt[] = "GMT";
@@ -353,6 +369,7 @@
         }
         free(cp);
     }
+#endif
 
     return format;
 }
@@ -411,7 +428,7 @@
 
 /*
  * Presently HAVE_STRNDUP is never defined, so the second case is always taken
- * Darwin doesn't have strnup, everything else does
+ * Darwin doesn't have strndup, everything else does
  */
 #ifdef HAVE_STRNDUP
         tagName = strndup(filterExpression, tagNameLength);
@@ -433,6 +450,27 @@
     return -1;
 }
 
+#ifndef HAVE_STRSEP
+/* KISS replacement helper for below */
+static char* strsep(char** stringp, const char* delim)
+{
+    char* token;
+    char* ret = *stringp;
+
+    if (!ret || !*ret) {
+        return NULL;
+    }
+    token = strpbrk(ret, delim);
+    if (token) {
+        *token = '\0';
+        ++token;
+    } else {
+        token = ret + strlen(ret);
+    }
+    *stringp = token;
+    return ret;
+}
+#endif
 
 /**
  * filterString: a comma/whitespace-separated set of filter expressions
@@ -444,7 +482,6 @@
  * Assumes single threaded execution
  *
  */
-
 LIBLOG_ABI_PUBLIC int android_log_addFilterString(
         AndroidLogFormat *p_format,
         const char *filterString)
@@ -728,6 +765,7 @@
             }
         }
     }
+    outCount = 0;
     lval = 0;
     switch (type) {
     case EVENT_TYPE_INT:
@@ -953,7 +991,7 @@
 LIBLOG_ABI_PUBLIC int android_log_processBinaryLogBuffer(
         struct logger_entry *buf,
         AndroidLogEntry *entry,
-        const EventTagMap *map,
+        const EventTagMap *map __unused,
         char *messageBuf, int messageBufLen)
 {
     size_t inCount;
@@ -995,11 +1033,12 @@
     inCount -= 4;
 
     entry->tagLen = 0;
+    entry->tag = NULL;
+#ifdef __ANDROID__
     if (map != NULL) {
         entry->tag = android_lookupEventTag_len(map, &entry->tagLen, tagIndex);
-    } else {
-        entry->tag = NULL;
     }
+#endif
 
     /*
      * If we don't have a map, or didn't find the tag number in the map,
@@ -1024,9 +1063,11 @@
      */
     const char* fmtStr = NULL;
     size_t fmtLen = 0;
+#ifdef __ANDROID__
     if (descriptive_output && map) {
         fmtStr = android_lookupEventFormat_len(map, &fmtLen, tagIndex);
     }
+#endif
 
     char* outBuf = messageBuf;
     size_t outRemaining = messageBufLen - 1; /* leave one for nul byte */
@@ -1250,6 +1291,7 @@
     return (long long)now->tv_sec * NS_PER_SEC + now->tv_nsec;
 }
 
+#ifdef __ANDROID__
 static void convertMonotonic(struct timespec *result,
                              const AndroidLogEntry *entry)
 {
@@ -1482,6 +1524,7 @@
     result->tv_nsec = entry->tv_nsec;
     subTimespec(result, result, &convert);
 }
+#endif
 
 /**
  * Formats a log message into a buffer
@@ -1529,6 +1572,7 @@
      */
     now = entry->tv_sec;
     nsec = entry->tv_nsec;
+#if __ANDROID__
     if (p_format->monotonic_output) {
         // prevent convertMonotonic from being called if logd is monotonic
         if (android_log_clockid() != CLOCK_MONOTONIC) {
@@ -1538,6 +1582,7 @@
             nsec = time.tv_nsec;
         }
     }
+#endif
     if (now < 0) {
         nsec = NS_PER_SEC - nsec;
     }
@@ -1591,13 +1636,18 @@
              * This code is Android specific, bionic guarantees that
              * calls to non-reentrant getpwuid() are thread safe.
              */
+#if !defined(__MINGW32__)
+#if (FAKE_LOG_DEVICE == 0)
 #ifndef __BIONIC__
 #warning "This code assumes that getpwuid is thread safe, only true with Bionic!"
 #endif
+#endif
             struct passwd* pwd = getpwuid(entry->uid);
             if (pwd && (strlen(pwd->pw_name) <= 5)) {
                  snprintf(uid, sizeof(uid), "%5s:", pwd->pw_name);
-            } else {
+            } else
+#endif
+            {
                  // Not worth parsing package list, names all longer than 5
                  snprintf(uid, sizeof(uid), "%5d:", entry->uid);
             }
diff --git a/liblog/tests/Android.mk b/liblog/tests/Android.mk
index 097befc..cfea452 100644
--- a/liblog/tests/Android.mk
+++ b/liblog/tests/Android.mk
@@ -55,7 +55,8 @@
     -fno-builtin \
 
 test_src_files := \
-    liblog_test.cpp \
+    liblog_test_default.cpp \
+    liblog_test_local.cpp \
     log_id_test.cpp \
     log_radio_test.cpp \
     log_read_test.cpp \
@@ -111,6 +112,7 @@
 LOCAL_CXX_STL := libc++
 LOCAL_SHARED_LIBRARIES := liblog libcutils libbase
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+LOCAL_LDLIBS_linux := -lrt
 include $(BUILD_HOST_NATIVE_TEST)
 
 endif  # ifeq ($(HOST_OS)-$(HOST_ARCH),$(filter $(HOST_OS)-$(HOST_ARCH),linux-x86 linux-x86_64))
diff --git a/liblog/tests/liblog_benchmark.cpp b/liblog/tests/liblog_benchmark.cpp
index dc411c3..dac84eb 100644
--- a/liblog/tests/liblog_benchmark.cpp
+++ b/liblog/tests/liblog_benchmark.cpp
@@ -27,6 +27,7 @@
 #include <android-base/file.h>
 #include <cutils/sockets.h>
 #include <log/event_tag_map.h>
+#include <log/log_frontend.h>
 #include <private/android_logger.h>
 
 #include "benchmark.h"
@@ -80,10 +81,29 @@
 }
 BENCHMARK(BM_log_maximum);
 
+static void set_log_null() {
+    android_set_log_frontend(LOGGER_NULL);
+}
+
+static void set_log_default() {
+    android_set_log_frontend(LOGGER_DEFAULT);
+}
+
+static void BM_log_maximum_null(int iters) {
+    set_log_null();
+    BM_log_maximum(iters);
+    set_log_default();
+}
+BENCHMARK(BM_log_maximum_null);
+
 /*
- *	Measure the time it takes to submit the android logging call using
- * discrete acquisition under light load. Expect this to be a pair of
- * syscall periods (2us).
+ *	Measure the time it takes to collect the time using
+ * discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
+ * under light load. Expect this to be a syscall period (2us) or
+ * data read time if zero-syscall.
+ *
+ * vdso support in the kernel and the library can allow
+ * clock_gettime to be zero-syscall.
  */
 static void BM_clock_overhead(int iters) {
     for (int i = 0; i < iters; ++i) {
@@ -468,19 +488,94 @@
 BENCHMARK(BM_pmsg_long_unaligned1);
 
 /*
- *	Measure the time it takes to submit the android logging call using
- * discrete acquisition under light load. Expect this to be a dozen or so
- * syscall periods (40us).
+ *	Measure the time it takes to form sprintf plus time using
+ * discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
+ * under light load. Expect this to be a syscall period (2us) or sprintf
+ * time if zero-syscall time.
  */
-static void BM_log_overhead(int iters) {
+/* helper function */
+static void test_print(const char *fmt, ...) {
+    va_list ap;
+    char buf[1024];
+
+    va_start(ap, fmt);
+    vsnprintf(buf, sizeof(buf), fmt, ap);
+    va_end(ap);
+}
+
+#define logd_yield() sched_yield() // allow logd to catch up
+#define logd_sleep() usleep(50)    // really allow logd to catch up
+
+/* performance test */
+static void BM_sprintf_overhead(int iters) {
+    for (int i = 0; i < iters; ++i) {
+       StartBenchmarkTiming();
+       test_print("BM_sprintf_overhead:%d", i);
+       StopBenchmarkTiming();
+       logd_yield();
+    }
+}
+BENCHMARK(BM_sprintf_overhead);
+
+/*
+ *	Measure the time it takes to submit the android printing logging call
+ * using discrete acquisition discrete acquisition (StartBenchmarkTiming() ->
+ * StopBenchmarkTiming()) under light load. Expect this to be a dozen or so
+ * syscall periods (40us) plus time to run *printf
+ */
+static void BM_log_print_overhead(int iters) {
     for (int i = 0; i < iters; ++i) {
        StartBenchmarkTiming();
        __android_log_print(ANDROID_LOG_INFO, "BM_log_overhead", "%d", i);
        StopBenchmarkTiming();
-       usleep(1000);
+       logd_yield();
     }
 }
-BENCHMARK(BM_log_overhead);
+BENCHMARK(BM_log_print_overhead);
+
+/*
+ *	Measure the time it takes to submit the android event logging call
+ * using discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
+ * under light load. Expect this to be a dozen or so syscall periods (40us)
+ */
+static void BM_log_event_overhead(int iters) {
+    for (unsigned long long i = 0; i < (unsigned)iters; ++i) {
+       StartBenchmarkTiming();
+       __android_log_btwrite(0, EVENT_TYPE_LONG, &i, sizeof(i));
+       StopBenchmarkTiming();
+       logd_yield();
+    }
+}
+BENCHMARK(BM_log_event_overhead);
+
+static void BM_log_event_overhead_null(int iters) {
+    set_log_null();
+    BM_log_event_overhead(iters);
+    set_log_default();
+}
+BENCHMARK(BM_log_event_overhead_null);
+
+/*
+ *	Measure the time it takes to submit the android event logging call
+ * using discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
+ * under very-light load (<1% CPU utilization).
+ */
+static void BM_log_light_overhead(int iters) {
+    for (unsigned long long i = 0; i < (unsigned)iters; ++i) {
+       StartBenchmarkTiming();
+       __android_log_btwrite(0, EVENT_TYPE_LONG, &i, sizeof(i));
+       StopBenchmarkTiming();
+       usleep(10000);
+    }
+}
+BENCHMARK(BM_log_light_overhead);
+
+static void BM_log_light_overhead_null(int iters) {
+    set_log_null();
+    BM_log_light_overhead(iters);
+    set_log_default();
+}
+BENCHMARK(BM_log_light_overhead_null);
 
 static void caught_latency(int /*signum*/)
 {
diff --git a/liblog/tests/liblog_test.cpp b/liblog/tests/liblog_test.cpp
index 5faf8e1..bc0ea4c 100644
--- a/liblog/tests/liblog_test.cpp
+++ b/liblog/tests/liblog_test.cpp
@@ -37,9 +37,32 @@
 #include <gtest/gtest.h>
 #include <log/logprint.h>
 #include <log/log_event_list.h>
+#include <log/log_frontend.h>
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
+#ifndef TEST_PREFIX
+#ifdef __ANDROID__ // make sure we always run code if compiled for android
+#define TEST_PREFIX
+#endif
+#endif
+
+#if (!defined(USING_LOGGER_DEFAULT) || !defined(USING_LOGGER_LOCAL))
+#ifdef liblog // a binary clue that we are overriding the test names
+// Does not support log reading blocking feature yet
+// Does not support LOG_ID_SECURITY (unless we set LOGGER_LOCAL | LOGGER_LOGD)
+// Assume some common aspects are tested by USING_LOGGER_DEFAULT:
+// Does not need to _retest_ pmsg functionality
+// Does not need to _retest_ property handling as it is a higher function
+// Does not need to _retest_ event mapping functionality
+// Does not need to _retest_ ratelimit
+// Does not need to _retest_ logprint
+#define USING_LOGGER_LOCAL
+#else
+#define USING_LOGGER_DEFAULT
+#endif
+#endif
+
 // enhanced version of LOG_FAILURE_RETRY to add support for EAGAIN and
 // non-syscall libs. Since we are only using this in the emergency of
 // a signal to stuff a terminating code into the logs, we will spin rather
@@ -56,7 +79,9 @@
     _rc; })
 
 TEST(liblog, __android_log_btwrite) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
+#endif
     int intBuf = 0xDEADBEEF;
     EXPECT_LT(0, __android_log_btwrite(0,
                                       EVENT_TYPE_INT,
@@ -71,13 +96,10 @@
                                       EVENT_TYPE_STRING,
                                       Buf, sizeof(Buf) - 1));
     usleep(1000);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
 
-#ifdef __ANDROID__
-std::string popenToString(std::string command) {
+#if (defined(__ANDROID__) && !defined(USING_LOGGER_LOCAL))
+static std::string popenToString(std::string command) {
     std::string ret;
 
     FILE* fp = popen(command.c_str(), "r");
@@ -141,11 +163,11 @@
     return false;
 }
 
-bool tested__android_log_close;
+static bool tested__android_log_close;
 #endif
 
 TEST(liblog, __android_log_btwrite__android_logger_list_read) {
-#ifdef __ANDROID__
+#if (defined(__ANDROID__) || defined(USING_LOGGER_LOCAL))
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
@@ -153,9 +175,10 @@
     ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
         LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
-    // Check that we can close and reopen the logger
     log_time ts(CLOCK_MONOTONIC);
     ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
+#ifndef USING_LOGGER_LOCAL
+    // Check that we can close and reopen the logger
     bool pmsgActiveAfter__android_log_btwrite;
     bool logdwActiveAfter__android_log_btwrite;
     if (getuid() == AID_ROOT) {
@@ -174,15 +197,18 @@
         EXPECT_FALSE(pmsgActiveAfter__android_log_close);
         EXPECT_FALSE(logdwActiveAfter__android_log_close);
     }
+#endif
 
     log_time ts1(CLOCK_MONOTONIC);
     ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts1, sizeof(ts1)));
+#ifndef USING_LOGGER_LOCAL
     if (getuid() == AID_ROOT) {
         pmsgActiveAfter__android_log_btwrite = isPmsgActive();
         logdwActiveAfter__android_log_btwrite = isLogdwActive();
         EXPECT_TRUE(pmsgActiveAfter__android_log_btwrite);
         EXPECT_TRUE(logdwActiveAfter__android_log_btwrite);
     }
+#endif
     usleep(1000000);
 
     int count = 0;
@@ -225,15 +251,92 @@
 #endif
 }
 
-#ifdef __ANDROID__
-static inline int32_t get4LE(const char* src)
-{
+// This test makes little sense standalone, and requires the tests ahead
+// and behind us, to make us whole.  We could incorporate a prefix and
+// suffix test to make this standalone, but opted to not complicate this.
+TEST(liblog, android_set_log_frontend) {
+#if (defined(__ANDROID__) || defined(USING_LOGGER_LOCAL))
+#ifdef TEST_PREFIX
+    TEST_PREFIX
+#endif
+
+    int logger = android_get_log_frontend();
+    EXPECT_NE(LOGGER_NULL, logger);
+
+    EXPECT_EQ(LOGGER_NULL, android_set_log_frontend(LOGGER_NULL));
+    EXPECT_EQ(LOGGER_NULL, android_get_log_frontend());
+
+    pid_t pid = getpid();
+
+    struct logger_list *logger_list;
+    ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
+        LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
+
+    log_time ts(CLOCK_MONOTONIC);
+    ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
+
+    usleep(1000000);
+
+    int count = 0;
+
+    for (;;) {
+        log_msg log_msg;
+        if (android_logger_list_read(logger_list, &log_msg) <= 0) {
+            break;
+        }
+
+        ASSERT_EQ(log_msg.entry.pid, pid);
+
+        if ((log_msg.entry.len != sizeof(android_log_event_long_t))
+         || (log_msg.id() != LOG_ID_EVENTS)) {
+            continue;
+        }
+
+        android_log_event_long_t* eventData;
+        eventData = reinterpret_cast<android_log_event_long_t*>(log_msg.msg());
+
+        if (!eventData || (eventData->payload.type != EVENT_TYPE_LONG)) {
+            continue;
+        }
+
+        log_time tx(reinterpret_cast<char*>(&eventData->payload.data));
+        if (ts == tx) {
+            ++count;
+        }
+    }
+
+    android_logger_list_close(logger_list);
+
+    EXPECT_EQ(logger, android_set_log_frontend(logger));
+    EXPECT_EQ(logger, android_get_log_frontend());
+
+    // False negative if liblog.__android_log_btwrite__android_logger_list_read
+    // fails above, so we will likely succeed. But we will have so many
+    // failures elsewhere that it is probably not worthwhile for us to
+    // highlight yet another disappointment.
+    EXPECT_EQ(0, count);
+    // We also expect failures in the following tests if the set does not
+    // react in an appropriate manner internally, yet passes, so we depend
+    // on this test being in the middle of a series of tests performed in
+    // the same process.
+#else
+    GTEST_LOG_(INFO) << "This test does nothing.\n";
+#endif
+}
+
+#ifdef TEST_PREFIX
+static inline uint32_t get4LE(const uint8_t* src) {
     return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
 }
+
+static inline uint32_t get4LE(const char* src) {
+    return get4LE(reinterpret_cast<const uint8_t*>(src));
+}
 #endif
 
 static void bswrite_test(const char *message) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
@@ -241,7 +344,11 @@
     ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
         LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
+#ifdef __ANDROID__
     log_time ts(android_log_clockid());
+#else
+    log_time ts(CLOCK_REALTIME);
+#endif
 
     ASSERT_LT(0, __android_log_bswrite(0, message));
     size_t num_lines = 1, size = 0, length = 0, total = 0;
@@ -307,8 +414,11 @@
                 &log_msg.entry_v1, &entry, NULL, msgBuf, sizeof(msgBuf));
             EXPECT_EQ((length == total) ? 0 : -1, processBinaryLogBuffer);
             if (processBinaryLogBuffer == 0) {
+                size_t line_overhead = 20;
+                if (pid > 99999) ++line_overhead;
+                if (pid > 999999) ++line_overhead;
                 fflush(stderr);
-                EXPECT_EQ((int)((20 * num_lines) + size),
+                EXPECT_EQ((int)((line_overhead * num_lines) + size),
                     android_log_printLogLine(logformat, fileno(stderr), &entry));
             }
             android_log_format_free(logformat);
@@ -345,7 +455,8 @@
 }
 
 static void buf_write_test(const char *message) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
@@ -354,7 +465,11 @@
         LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
     static const char tag[] = "TEST__android_log_buf_write";
+#ifdef __ANDROID__
     log_time ts(android_log_clockid());
+#else
+    log_time ts(CLOCK_REALTIME);
+#endif
 
     EXPECT_LT(0, __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_INFO,
                                          tag, message));
@@ -402,8 +517,11 @@
                                                             &entry);
         EXPECT_EQ(0, processLogBuffer);
         if (processLogBuffer == 0) {
+            size_t line_overhead = 11;
+            if (pid > 99999) ++line_overhead;
+            if (pid > 999999) ++line_overhead;
             fflush(stderr);
-            EXPECT_EQ((int)(((11 + sizeof(tag)) * num_lines) + size),
+            EXPECT_EQ((int)(((line_overhead + sizeof(tag)) * num_lines) + size),
                 android_log_printLogLine(logformat, fileno(stderr), &entry));
         }
         android_log_format_free(logformat);
@@ -430,7 +548,8 @@
     buf_write_test("\n Hello World \n");
 }
 
-#ifdef __ANDROID__
+#ifndef USING_LOGGER_LOCAL // requires blocking reader functionality
+#ifdef TEST_PREFIX
 static unsigned signaled;
 static log_time signal_time;
 
@@ -492,7 +611,8 @@
 #endif
 
 TEST(liblog, android_logger_list_read__cpu_signal) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     struct logger_list *logger_list;
     unsigned long long v = 0xDEADBEEFA55A0000ULL;
 
@@ -584,7 +704,7 @@
 #endif
 }
 
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
 /*
  *  Strictly, we are not allowed to log messages in a signal context, the
  * correct way to handle this is to ensure the messages are constructed in
@@ -618,7 +738,7 @@
     return NULL;
 }
 
-int start_thread()
+static int start_thread()
 {
     sem_init(&thread_trigger, 0, 0);
 
@@ -650,7 +770,8 @@
 #endif
 
 TEST(liblog, android_logger_list_read__cpu_thread) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     struct logger_list *logger_list;
     unsigned long long v = 0xDEADBEAFA55A0000ULL;
 
@@ -742,8 +863,9 @@
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
+#endif // !USING_LOGGER_LOCAL
 
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
 static const char max_payload_tag[] = "TEST_max_payload_and_longish_tag_XXXX";
 #define SIZEOF_MAX_PAYLOAD_BUF (LOGGER_ENTRY_MAX_PAYLOAD - \
                                 sizeof(max_payload_tag) - 1)
@@ -880,7 +1002,8 @@
 takes his leave.";
 
 TEST(liblog, max_payload) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     pid_t pid = getpid();
     char tag[sizeof(max_payload_tag)];
     memcpy(tag, max_payload_tag, sizeof(tag));
@@ -944,7 +1067,8 @@
 }
 
 TEST(liblog, __android_log_buf_print__maxtag) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
@@ -952,7 +1076,11 @@
     ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
         LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
+#ifdef __ANDROID__
     log_time ts(android_log_clockid());
+#else
+    log_time ts(CLOCK_REALTIME);
+#endif
 
     EXPECT_LT(0, __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_INFO,
                                          max_payload_buf, max_payload_buf));
@@ -1004,7 +1132,8 @@
 }
 
 TEST(liblog, too_big_payload) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     pid_t pid = getpid();
     static const char big_payload_tag[] = "TEST_big_payload_XXXX";
     char tag[sizeof(big_payload_tag)];
@@ -1058,6 +1187,12 @@
     EXPECT_LE(LOGGER_ENTRY_MAX_PAYLOAD - sizeof(big_payload_tag),
               static_cast<size_t>(max_len));
 
+    // SLOP: Allow the underlying interface to optionally place a
+    // terminating nul at the LOGGER_ENTRY_MAX_PAYLOAD's last byte
+    // or not.
+    if (ret == (max_len + static_cast<ssize_t>(sizeof(big_payload_tag)) - 1)) {
+        --max_len;
+    }
     EXPECT_EQ(ret, max_len + static_cast<ssize_t>(sizeof(big_payload_tag)));
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -1065,17 +1200,29 @@
 }
 
 TEST(liblog, dual_reader) {
-#ifdef __ANDROID__
-    struct logger_list *logger_list1;
+#ifdef TEST_PREFIX
+    TEST_PREFIX
 
-    // >25 messages due to liblog.__android_log_buf_print__concurrentXX above.
+    static const int num = 25;
+
+    for (int i = 25; i > 0; --i) {
+        static const char fmt[] = "dual_reader %02d";
+        char buffer[sizeof(fmt) + 8];
+        snprintf(buffer, sizeof(buffer), fmt, i);
+        LOG_FAILURE_RETRY(__android_log_buf_write(LOG_ID_MAIN,
+                                                  ANDROID_LOG_INFO,
+                                                  "liblog", buffer));
+    }
+    usleep(1000000);
+
+    struct logger_list *logger_list1;
     ASSERT_TRUE(NULL != (logger_list1 = android_logger_list_open(
-        LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 25, 0)));
+        LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, num, 0)));
 
     struct logger_list *logger_list2;
 
     if (NULL == (logger_list2 = android_logger_list_open(
-            LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 15, 0))) {
+            LOG_ID_MAIN, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, num - 10, 0))) {
         android_logger_list_close(logger_list1);
         ASSERT_TRUE(NULL != logger_list2);
     }
@@ -1108,22 +1255,20 @@
     android_logger_list_close(logger_list1);
     android_logger_list_close(logger_list2);
 
-    EXPECT_EQ(25, count1);
-    EXPECT_EQ(15, count2);
+    EXPECT_EQ(num, count1);
+    EXPECT_EQ(num - 10, count2);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
-#ifdef __ANDROID__
+#ifndef USING_LOGGER_LOCAL // Do not retest logprint
 static bool checkPriForTag(AndroidLogFormat *p_format, const char *tag, android_LogPriority pri) {
     return android_log_shouldPrintLine(p_format, tag, pri)
         && !android_log_shouldPrintLine(p_format, tag, (android_LogPriority)(pri - 1));
 }
-#endif
 
 TEST(liblog, filterRule) {
-#ifdef __ANDROID__
     static const char tag[] = "random";
 
     AndroidLogFormat *p_format = android_log_format_new();
@@ -1185,11 +1330,10 @@
 #endif
 
     android_log_format_free(p_format);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
+#endif // !USING_LOGGER_LOCAL
 
+#ifndef USING_LOGGER_LOCAL // Do not retest property handling
 TEST(liblog, is_loggable) {
 #ifdef __ANDROID__
     static const char tag[] = "is_loggable";
@@ -1488,8 +1632,13 @@
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
+#endif // !USING_LOGGER_LOCAL
 
-#ifdef __ANDROID__
+// Following tests the specific issues surrounding error handling wrt logd.
+// Kills logd and toss all collected data, equivalent to logcat -b all -c,
+// except we also return errors to the logging callers.
+#ifndef USING_LOGGER_LOCAL
+#ifdef TEST_PREFIX
 // helper to liblog.enoent to count end-to-end matching logging messages.
 static int count_matching_ts(log_time ts) {
     usleep(1000000);
@@ -1531,10 +1680,11 @@
         testing::AssertionSuccess() :
         (testing::AssertionFailure() << message);
 }
-#endif
+#endif // TEST_PREFIX
 
 TEST(liblog, enoent) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
+    TEST_PREFIX
     log_time ts(CLOCK_MONOTONIC);
     EXPECT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
     EXPECT_EQ(1, count_matching_ts(ts));
@@ -1588,9 +1738,12 @@
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
+#endif // !USING_LOCAL_LOGGER
 
 // Below this point we run risks of setuid(AID_SYSTEM) which may affect others.
 
+// Do not retest properties, and cannot log into LOG_ID_SECURITY
+#ifndef USING_LOGGER_LOCAL
 TEST(liblog, __security) {
 #ifdef __ANDROID__
     static const char persist_key[] = "persist.logd.security";
@@ -1776,15 +1929,19 @@
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
+#endif // !USING_LOGGER_LOCAL
 
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
 static void android_errorWriteWithInfoLog_helper(int TAG, const char* SUBTAG,
                                                  int UID, const char* payload,
                                                  int DATA_LEN, int& count) {
+    TEST_PREFIX
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
 
+    count = 0;
+
     ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
         LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
@@ -1798,8 +1955,6 @@
 
     sleep(2);
 
-    count = 0;
-
     for (;;) {
         log_msg log_msg;
         if (android_logger_list_read(logger_list, &log_msg) <= 0) {
@@ -1839,7 +1994,7 @@
         ASSERT_EQ(EVENT_TYPE_STRING, eventData[0]);
         eventData++;
 
-        int subtag_len = strlen(SUBTAG);
+        unsigned subtag_len = strlen(SUBTAG);
         if (subtag_len > 32) subtag_len = 32;
         ASSERT_EQ(subtag_len, get4LE(eventData));
         eventData += 4;
@@ -1853,7 +2008,7 @@
         ASSERT_EQ(EVENT_TYPE_INT, eventData[0]);
         eventData++;
 
-        ASSERT_EQ(UID, get4LE(eventData));
+        ASSERT_EQ(UID, (int)get4LE(eventData));
         eventData += 4;
 
         // Element #3: string type for data
@@ -1883,7 +2038,7 @@
 #endif
 
 TEST(liblog, android_errorWriteWithInfoLog__android_logger_list_read__typical) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     int count;
     android_errorWriteWithInfoLog_helper(
             123456781,
@@ -1899,7 +2054,7 @@
 }
 
 TEST(liblog, android_errorWriteWithInfoLog__android_logger_list_read__data_too_large) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     int count;
     android_errorWriteWithInfoLog_helper(
             123456782,
@@ -1915,7 +2070,7 @@
 }
 
 TEST(liblog, android_errorWriteWithInfoLog__android_logger_list_read__null_data) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     int count;
     android_errorWriteWithInfoLog_helper(
             123456783,
@@ -1931,7 +2086,7 @@
 }
 
 TEST(liblog, android_errorWriteWithInfoLog__android_logger_list_read__subtag_too_long) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     int count;
     android_errorWriteWithInfoLog_helper(
             123456784,
@@ -1954,12 +2109,15 @@
     buf_write_test(max_payload_buf);
 }
 
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
 static void android_errorWriteLog_helper(int TAG, const char *SUBTAG, int& count) {
+    TEST_PREFIX
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
 
+    count = 0;
+
     ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
         LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
@@ -1972,8 +2130,6 @@
 
     sleep(2);
 
-    count = 0;
-
     for (;;) {
         log_msg log_msg;
         if (android_logger_list_read(logger_list, &log_msg) <= 0) {
@@ -2011,7 +2167,7 @@
         ASSERT_EQ(EVENT_TYPE_STRING, eventData[0]);
         eventData++;
 
-        ASSERT_EQ((int) strlen(SUBTAG), get4LE(eventData));
+        ASSERT_EQ(strlen(SUBTAG), get4LE(eventData));
         eventData +=4;
 
         if (memcmp(SUBTAG, eventData, strlen(SUBTAG))) {
@@ -2025,7 +2181,7 @@
 #endif
 
 TEST(liblog, android_errorWriteLog__android_logger_list_read__success) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     int count;
     android_errorWriteLog_helper(123456785, "test-subtag", count);
     EXPECT_EQ(1, count);
@@ -2035,7 +2191,7 @@
 }
 
 TEST(liblog, android_errorWriteLog__android_logger_list_read__null_subtag) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     int count;
     android_errorWriteLog_helper(123456786, NULL, count);
     EXPECT_EQ(0, count);
@@ -2044,7 +2200,8 @@
 #endif
 }
 
-#ifdef __ANDROID__
+// Do not retest logger list handling
+#if (defined(TEST_PREFIX) || !defined(USING_LOGGER_LOCAL))
 static int is_real_element(int type) {
     return ((type == EVENT_TYPE_INT) ||
             (type == EVENT_TYPE_LONG) ||
@@ -2052,8 +2209,8 @@
             (type == EVENT_TYPE_FLOAT));
 }
 
-int android_log_buffer_to_string(const char *msg, size_t len,
-                                 char *strOut, size_t strOutLen) {
+static int android_log_buffer_to_string(const char *msg, size_t len,
+                                        char *strOut, size_t strOutLen) {
     android_log_context context = create_android_log_parser(msg, len);
     android_log_list_element elem;
     bool overflow = false;
@@ -2203,7 +2360,9 @@
 
     return 0;
 }
+#endif // TEST_PREFIX || !USING_LOGGER_LOCAL
 
+#ifdef TEST_PREFIX
 static const char *event_test_int32(uint32_t tag, size_t &expected_len) {
     android_log_context ctx;
 
@@ -2459,6 +2618,7 @@
 }
 
 static void create_android_logger(const char *(*fn)(uint32_t tag, size_t &expected_len)) {
+    TEST_PREFIX
     struct logger_list *logger_list;
 
     pid_t pid = getpid();
@@ -2466,7 +2626,11 @@
     ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
         LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 1000, pid)));
 
+#ifdef __ANDROID__
     log_time ts(android_log_clockid());
+#else
+    log_time ts(CLOCK_REALTIME);
+#endif
 
     size_t expected_len;
     const char *expected_string = (*fn)(1005, expected_len);
@@ -2507,18 +2671,23 @@
             &log_msg.entry_v1, &entry, NULL, msgBuf, sizeof(msgBuf));
         EXPECT_EQ(0, processBinaryLogBuffer);
         if (processBinaryLogBuffer == 0) {
+            int line_overhead = 20;
+            if (pid > 99999) ++line_overhead;
+            if (pid > 999999) ++line_overhead;
             print_barrier();
             int printLogLine = android_log_printLogLine(
                 logformat, fileno(stderr), &entry);
             print_barrier();
-            EXPECT_EQ(20 + (int)strlen(expected_string), printLogLine);
+            EXPECT_EQ(line_overhead + (int)strlen(expected_string),
+                      printLogLine);
         }
         android_log_format_free(logformat);
 
         // test buffer reading API
         int buffer_to_string = -1;
         if (eventData) {
-            snprintf(msgBuf, sizeof(msgBuf), "I/[%d]", get4LE(eventData));
+            snprintf(msgBuf, sizeof(msgBuf),
+                     "I/[%" PRIu32 "]", get4LE(eventData));
             print_barrier();
             fprintf(stderr, "%-10s(%5u): ", msgBuf, pid);
             memset(msgBuf, 0, sizeof(msgBuf));
@@ -2541,7 +2710,7 @@
 #endif
 
 TEST(liblog, create_android_logger_int32) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_int32);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2549,7 +2718,7 @@
 }
 
 TEST(liblog, create_android_logger_int64) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_int64);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2557,7 +2726,7 @@
 }
 
 TEST(liblog, create_android_logger_list_int64) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_list_int64);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2565,7 +2734,7 @@
 }
 
 TEST(liblog, create_android_logger_simple_automagic_list) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_simple_automagic_list);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2573,7 +2742,7 @@
 }
 
 TEST(liblog, create_android_logger_list_empty) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_list_empty);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2581,7 +2750,7 @@
 }
 
 TEST(liblog, create_android_logger_complex_nested_list) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_complex_nested_list);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2589,7 +2758,7 @@
 }
 
 TEST(liblog, create_android_logger_7_level_prefix) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_7_level_prefix);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2597,7 +2766,7 @@
 }
 
 TEST(liblog, create_android_logger_7_level_suffix) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_7_level_suffix);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2605,7 +2774,7 @@
 }
 
 TEST(liblog, create_android_logger_android_log_error_write) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_android_log_error_write);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
@@ -2613,15 +2782,15 @@
 }
 
 TEST(liblog, create_android_logger_android_log_error_write_null) {
-#ifdef __ANDROID__
+#ifdef TEST_PREFIX
     create_android_logger(event_test_android_log_error_write_null);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
 
+#ifndef USING_LOGGER_LOCAL // Do not retest logger list handling
 TEST(liblog, create_android_logger_overflow) {
-#ifdef __ANDROID__
     android_log_context ctx;
 
     EXPECT_TRUE(NULL != (ctx = create_android_logger(1005)));
@@ -2646,13 +2815,9 @@
     EXPECT_GT(0, android_log_write_list_begin(ctx));
     EXPECT_LE(0, android_log_destroy(&ctx));
     ASSERT_TRUE(NULL == ctx);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
 
 TEST(liblog, android_log_write_list_buffer) {
-#ifdef __ANDROID__
     __android_log_event_list ctx(1005);
     ctx << 1005 << "tag_def" << "(tag|1),(name|3),(format|3)";
     std::string buffer(ctx);
@@ -2663,11 +2828,10 @@
     EXPECT_EQ(android_log_buffer_to_string(buffer.data(), buffer.length(),
                                            msgBuf, sizeof(msgBuf)), 0);
     EXPECT_STREQ(msgBuf, "[1005,tag_def,(tag|1),(name|3),(format|3)]");
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
+#endif // !USING_LOGGER_LOCAL
 
+#ifndef USING_LOGGER_LOCAL // Do not retest pmsg functionality
 #ifdef __ANDROID__
 static const char __pmsg_file[] =
         "/data/william-shakespeare/MuchAdoAboutNothing.txt";
@@ -2730,8 +2894,8 @@
 }
 
 #ifdef __ANDROID__
-ssize_t __pmsg_fn(log_id_t logId, char prio, const char *filename,
-                  const char *buf, size_t len, void *arg) {
+static ssize_t __pmsg_fn(log_id_t logId, char prio, const char *filename,
+                         const char *buf, size_t len, void *arg) {
     EXPECT_TRUE(NULL == arg);
     EXPECT_EQ(LOG_ID_CRASH, logId);
     EXPECT_EQ(ANDROID_LOG_VERBOSE, prio);
@@ -2793,7 +2957,9 @@
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
+#endif // !USING_LOGGER_LOCAL
 
+#ifndef USING_LOGGER_LOCAL // Do not retest event mapping functionality
 #ifdef __ANDROID__
 // must be: '<needle:> 0 kB'
 static bool isZero(const std::string &content, std::string::size_type pos,
@@ -2876,7 +3042,7 @@
     EXPECT_TRUE(IsOk(private_ok, content));
     EXPECT_TRUE(IsOk(anonymous_ok, content));
 }
-#endif
+#endif // __ANDROID__
 
 TEST(liblog, event_log_tags) {
 #ifdef __ANDROID__
@@ -2897,7 +3063,9 @@
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
+#endif // !USING_LOGGER_LOCAL
 
+#ifndef USING_LOGGER_LOCAL // Do not retest ratelimit
 TEST(liblog, __android_log_ratelimit) {
     time_t state = 0;
 
@@ -2929,7 +3097,9 @@
     }
     // Do not test default seconds, to allow liblog to tune freely
 }
+#endif // !USING_LOGGER_LOCAL
 
+#ifndef USING_LOGGER_LOCAL // Do not retest event mapping functionality
 TEST(liblog, android_lookupEventTagNum) {
 #ifdef __ANDROID__
     EventTagMap* map = android_openEventTagMap(NULL);
@@ -2945,3 +3115,4 @@
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
+#endif // !USING_LOGGER_LOCAL
diff --git a/liblog/tests/liblog_test_default.cpp b/liblog/tests/liblog_test_default.cpp
new file mode 100644
index 0000000..079ba07
--- /dev/null
+++ b/liblog/tests/liblog_test_default.cpp
@@ -0,0 +1,5 @@
+#ifdef __ANDROID__
+#include <log/log_frontend.h>
+#define TEST_PREFIX android_set_log_frontend(LOGGER_DEFAULT);
+#endif
+#include "liblog_test.cpp"
diff --git a/liblog/tests/liblog_test_local.cpp b/liblog/tests/liblog_test_local.cpp
new file mode 100644
index 0000000..5f7f645
--- /dev/null
+++ b/liblog/tests/liblog_test_local.cpp
@@ -0,0 +1,4 @@
+#include <log/log_frontend.h>
+#define liblog liblog_local
+#define TEST_PREFIX android_set_log_frontend(LOGGER_LOCAL);
+#include "liblog_test.cpp"
diff --git a/liblog/tests/log_id_test.cpp b/liblog/tests/log_id_test.cpp
index 3241534..b8223f1 100644
--- a/liblog/tests/log_id_test.cpp
+++ b/liblog/tests/log_id_test.cpp
@@ -31,7 +31,6 @@
 #endif
 
 TEST(liblog, log_id) {
-#ifdef __ANDROID__
     int count = 0;
 
     for(int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
@@ -44,13 +43,9 @@
         fprintf(stderr, "log buffer %s\r", name);
     }
     ASSERT_EQ(LOG_ID_MAX, count);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
 
 TEST(liblog, __android_log_buf_print) {
-#ifdef __ANDROID__
     EXPECT_LT(0, __android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_INFO,
                                          "TEST__android_log_buf_print",
                                          "radio"));
@@ -63,13 +58,9 @@
                                          "TEST__android_log_buf_print",
                                          "main"));
     usleep(1000);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
 
 TEST(liblog, __android_log_buf_write) {
-#ifdef __ANDROID__
     EXPECT_LT(0, __android_log_buf_write(LOG_ID_RADIO, ANDROID_LOG_INFO,
                                          "TEST__android_log_buf_write",
                                          "radio"));
@@ -82,26 +73,20 @@
                                          "TEST__android_log_buf_write",
                                          "main"));
     usleep(1000);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
 
-#ifdef __ANDROID__
 static void* ConcurrentPrintFn(void *arg) {
     int ret = __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_INFO,
                                   "TEST__android_log_print", "Concurrent %" PRIuPTR,
                                   reinterpret_cast<uintptr_t>(arg));
     return reinterpret_cast<void*>(ret);
 }
-#endif
 
 #define NUM_CONCURRENT 64
 #define _concurrent_name(a,n) a##__concurrent##n
 #define concurrent_name(a,n) _concurrent_name(a,n)
 
 TEST(liblog, concurrent_name(__android_log_buf_print, NUM_CONCURRENT)) {
-#ifdef __ANDROID__
     pthread_t t[NUM_CONCURRENT];
     int i;
     for (i=0; i < NUM_CONCURRENT; i++) {
@@ -119,7 +104,4 @@
         }
     }
     ASSERT_LT(0, ret);
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
diff --git a/liblog/tests/log_radio_test.cpp b/liblog/tests/log_radio_test.cpp
index 591748a..ecba777 100644
--- a/liblog/tests/log_radio_test.cpp
+++ b/liblog/tests/log_radio_test.cpp
@@ -27,7 +27,6 @@
 #include <log/log_radio.h>
 
 TEST(liblog, RLOG) {
-#ifdef __ANDROID__
     static const char content[] = "log_radio.h";
     static const char content_false[] = "log_radio.h false";
 
@@ -84,6 +83,7 @@
     usleep(100000);
     RLOGE_IF(false, content_false);
 
+#ifdef __ANDROID__
     // give time for content to long-path through logger
     sleep(1);
 
@@ -112,6 +112,6 @@
 #endif
 
 #else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
+    GTEST_LOG_(INFO) << "This test does not test end-to-end.\n";
 #endif
 }
diff --git a/liblog/tests/log_system_test.cpp b/liblog/tests/log_system_test.cpp
index b62832e..40e3a63 100644
--- a/liblog/tests/log_system_test.cpp
+++ b/liblog/tests/log_system_test.cpp
@@ -27,7 +27,6 @@
 #include <log/log_system.h>
 
 TEST(liblog, SLOG) {
-#ifdef __ANDROID__
     static const char content[] = "log_system.h";
     static const char content_false[] = "log_system.h false";
 
@@ -84,6 +83,7 @@
     usleep(100000);
     SLOGE_IF(false, content_false);
 
+#ifdef __ANDROID__
     // give time for content to long-path through logger
     sleep(1);
 
@@ -112,6 +112,6 @@
 #endif
 
 #else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
+    GTEST_LOG_(INFO) << "This test does not test end-to-end.\n";
 #endif
 }
diff --git a/liblog/tests/log_time_test.cpp b/liblog/tests/log_time_test.cpp
index f2601b6..59655ba 100644
--- a/liblog/tests/log_time_test.cpp
+++ b/liblog/tests/log_time_test.cpp
@@ -21,8 +21,6 @@
 #include <log/log_time.h>
 
 TEST(liblog, log_time) {
-#ifdef __ANDROID__
-
 #ifdef _SYSTEM_CORE_INCLUDE_PRIVATE_ANDROID_LOGGER_H_
     log_time(CLOCK_MONOTONIC);
 
@@ -36,8 +34,4 @@
     EXPECT_EQ(tl, ts);
     EXPECT_GE(tl, ts);
     EXPECT_LE(tl, ts);
-
-#else
-    GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif
 }
diff --git a/libsysutils/src/NetlinkEvent.cpp b/libsysutils/src/NetlinkEvent.cpp
index fef801a..79bc888 100644
--- a/libsysutils/src/NetlinkEvent.cpp
+++ b/libsysutils/src/NetlinkEvent.cpp
@@ -561,10 +561,12 @@
 static const char*
 has_prefix(const char* str, const char* end, const char* prefix, size_t prefixlen)
 {
-    if ((end-str) >= (ptrdiff_t)prefixlen && !memcmp(str, prefix, prefixlen))
+    if ((end - str) >= (ptrdiff_t)prefixlen &&
+        (prefixlen == 0 || !memcmp(str, prefix, prefixlen))) {
         return str + prefixlen;
-    else
+    } else {
         return NULL;
+    }
 }
 
 /* Same as strlen(x) for constant string literals ONLY */
diff --git a/rootdir/ueventd.rc b/rootdir/ueventd.rc
index 0633a68..3b64f6d 100644
--- a/rootdir/ueventd.rc
+++ b/rootdir/ueventd.rc
@@ -46,7 +46,7 @@
 /dev/tty0                 0660   root       system
 /dev/graphics/*           0660   root       graphics
 /dev/msm_hw3dm            0660   system     graphics
-/dev/input/*              0660   root       input
+/dev/input/*              0640   system     input
 /dev/eac                  0660   root       audio
 /dev/cam                  0660   root       camera
 /dev/pmem                 0660   system     graphics
diff --git a/toolbox/getevent.c b/toolbox/getevent.c
index e6def6b..1fb315c 100644
--- a/toolbox/getevent.c
+++ b/toolbox/getevent.c
@@ -321,7 +321,7 @@
     char idstr[80];
     struct input_id id;
 
-    fd = open(device, O_RDWR);
+    fd = open(device, O_RDONLY);
     if(fd < 0) {
         if(print_flags & PRINT_DEVICE_ERRORS)
             fprintf(stderr, "could not open %s, %s\n", device, strerror(errno));