libsysutils: New C++ system convenience library

        This library contains re-usable classes for common
    system level daemons. Initial consumers of this library
    are 'nexus' and 'vold2'

Signed-off-by: San Mehat <san@google.com>

Android.mk

@@ -21,6 +21,7 @@ else
   include $(addprefix $(LOCAL_PATH)/,$(addsuffix /Android.mk, \
 	      adb \
 	      libcutils \
+	      libsysutils \
 	      liblog \
 	      libnetutils \
 	      libpixelflinger \

include/sysutils/FrameworkCommand.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+#ifndef __FRAMEWORK_CMD_HANDLER_H
+#define __FRAMEWORK_CMD_HANDLER_H
+
+#include "../../../frameworks/base/include/utils/List.h"
+
+
+class FrameworkCommand { 
+private:
+    const char *mCommand;
+
+public:
+
+    FrameworkCommand(const char *cmd);
+    virtual ~FrameworkCommand() { }
+
+    virtual int runCommand(char *data);
+
+    const char *getCommand() { return mCommand; }
+};
+
+typedef android::List<FrameworkCommand *> FrameworkCommandCollection;
+#endif

include/sysutils/FrameworkListener.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+#ifndef _FRAMEWORKSOCKETLISTENER_H
+#define _FRAMEWORKSOCKETLISTENER_H
+
+#include "SocketListener.h"
+#include "FrameworkCommand.h"
+
+class FrameworkListener : public SocketListener {
+private:
+    FrameworkCommandCollection *mCommands;
+
+public:
+    FrameworkListener(const char *socketName);
+    virtual ~FrameworkListener() {}
+
+protected:
+    void registerCmd(FrameworkCommand *cmd);
+    virtual bool onDataAvailable(int socket);
+
+private:
+    void dispatchCommand(char *cmd);
+};
+#endif

include/sysutils/FrameworkManager.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+#ifndef _FRAMEWORKMANAGER_H
+#define _FRAMEWORKMANAGER_H
+
+#include <pthread.h>
+
+class FrameworkListener;
+
+class FrameworkManager {
+    int mDoorbell;        // Socket used to accept connections from framework
+    int mFwSock;          // Socket used to communicate with framework
+    const char *mSocketName;
+
+    FrameworkListener *mListener;
+
+    pthread_mutex_t mWriteMutex;
+
+public:
+    FrameworkManager(FrameworkListener *Listener);
+    virtual ~FrameworkManager() {}
+
+    int run();
+    int sendMsg(char *msg);
+    int sendMsg(char *msg, char *data);
+};
+#endif

include/sysutils/NetlinkEvent.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+#ifndef _NETLINKEVENT_H
+#define _NETLINKEVENT_H
+
+#define NL_PARAMS_MAX 32
+
+class NetlinkEvent {
+    int  mSeq;
+    char *mPath;
+    int  mAction;
+    char *mSubsystem;
+    char *mParams[NL_PARAMS_MAX];
+
+public:
+    const static int NlActionUnknown;
+    const static int NlActionAdd;
+    const static int NlActionRemove;
+    const static int NlActionChange;
+
+    NetlinkEvent();
+    virtual ~NetlinkEvent();
+
+    bool decode(char *buffer, int size);
+    const char *findParam(const char *paramName);
+
+    const char *getSubsystem() { return mSubsystem; }
+    int getAction() { return mAction; }
+};
+
+#endif

include/sysutils/NetlinkListener.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+#ifndef _NETLINKLISTENER_H
+#define _NETLINKLISTENER_H
+
+#include "SocketListener.h"
+
+class NetlinkEvent;
+
+class NetlinkListener : public SocketListener {
+    char mBuffer[64 * 1024];
+
+public:
+    NetlinkListener(int socket);
+    virtual ~NetlinkListener() {}
+protected:
+    virtual bool onDataAvailable(int socket);
+};
+#endif

include/sysutils/SocketListener.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+#ifndef _SOCKETLISTENER_H
+#define _SOCKETLISTENER_H
+
+class SocketListener {
+    int mSock;
+    int mCsock;
+    int mAcceptClients;
+    const char *mSocketName;
+
+public:
+    SocketListener(const char *socketName, bool acceptClients);
+    SocketListener(int socketFd, bool acceptClients);
+
+    virtual ~SocketListener() {}
+    virtual int run();
+
+protected:
+    virtual bool onDataAvailable(int socket);
+};
+#endif

libsysutils/Android.mk

@@ -0,0 +1,21 @@
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:=                             \
+                  src/FrameworkManager.cpp    \
+                  src/SocketListener.cpp      \
+                  src/FrameworkListener.cpp   \
+                  src/NetlinkListener.cpp     \
+                  src/NetlinkEvent.cpp        \
+                  src/FrameworkCommand.cpp    \
+
+LOCAL_MODULE:= libsysutils
+
+LOCAL_C_INCLUDES := $(KERNEL_HEADERS) 
+
+LOCAL_CFLAGS := 
+
+LOCAL_SHARED_LIBRARIES := libcutils
+
+include $(BUILD_SHARED_LIBRARY)

libsysutils/src/FrameworkCommand.cpp

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2008 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>
+
+#define LOG_TAG "FrameworkCommand"
+
+#include <cutils/log.h>
+
+#include <sysutils/FrameworkCommand.h>
+
+FrameworkCommand::FrameworkCommand(const char *cmd) {
+    mCommand = cmd;
+}
+
+int FrameworkCommand::runCommand(char *data) {
+    LOGW("Command %s has no run handler!", getCommand());
+    errno = ENOSYS;
+    return -1;
+}

libsysutils/src/FrameworkListener.cpp

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2008 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>
+
+#define LOG_TAG "FrameworkListener"
+
+#include <cutils/log.h>
+
+#include <sysutils/FrameworkListener.h>
+#include <sysutils/FrameworkCommand.h>
+
+FrameworkListener::FrameworkListener(const char *socketName) :
+                            SocketListener(socketName, true) {
+    mCommands = new FrameworkCommandCollection();
+}
+
+bool FrameworkListener::onDataAvailable(int socket) {
+    char buffer[101];
+    int len;
+
+    if ((len = read(socket, buffer, sizeof(buffer) -1)) < 0) {
+        LOGE("read() failed (%s)", strerror(errno));
+        return errno;
+    } else if (!len) {
+        LOGW("Lost connection to client");
+        return false;
+    }
+
+    int start = 0;
+    int i;
+
+    buffer[len] = '\0';
+
+    for (i = 0; i < len; i++) {
+        if (buffer[i] == '\0') {
+            dispatchCommand(buffer + start);
+            start = i + 1;
+        }
+    }
+    return true;
+}
+
+void FrameworkListener::registerCmd(FrameworkCommand *cmd) {
+    mCommands->push_back(cmd);
+}
+
+void FrameworkListener::dispatchCommand(char *cmd) {
+    FrameworkCommandCollection::iterator i;
+
+    for (i = mCommands->begin(); i != mCommands->end(); ++i) {
+        FrameworkCommand *c = *i;
+
+        if (!strncmp(cmd, c->getCommand(), strlen(c->getCommand()))) {
+            if (c->runCommand(cmd)) {
+                LOGW("Handler '%s' error (%s)", c->getCommand(), strerror(errno));
+            }
+            return;
+        }
+    }
+
+    LOGE("No cmd handlers defined for '%s'", cmd);
+}
+