am 0516aded: Merge "logd: libsysutils: logd startup outside init environment"

* commit '0516aded0e3006272ec390fd418d311e06b1d328':
  logd: libsysutils: logd startup outside init environment

include/sysutils/FrameworkListener.h

@@ -36,6 +36,7 @@ private:
 public:
     FrameworkListener(const char *socketName);
     FrameworkListener(const char *socketName, bool withSeq);
+    FrameworkListener(int sock);
     virtual ~FrameworkListener() {}
 
 protected:

libsysutils/src/FrameworkListener.cpp

@@ -39,6 +39,11 @@ FrameworkListener::FrameworkListener(const char *socketName) :
     init(socketName, false);
 }
 
+FrameworkListener::FrameworkListener(int sock) :
+                            SocketListener(sock, true) {
+    init(NULL, false);
+}
+
 void FrameworkListener::init(const char *socketName UNUSED, bool withSeq) {
     mCommands = new FrameworkCommandCollection();
     errorRate = 0;

logd/CommandListener.cpp

@@ -24,6 +24,7 @@
 #include <sys/socket.h>
 #include <sys/types.h>
 
+#include <cutils/sockets.h>
 #include <private/android_filesystem_config.h>
 #include <sysutils/SocketClient.h>
 
@@ -32,7 +33,7 @@
 
 CommandListener::CommandListener(LogBuffer *buf, LogReader * /*reader*/,
                                  LogListener * /*swl*/)
-        : FrameworkListener("logd")
+        : FrameworkListener(getLogSocket())
         , mBuf(*buf) {
     // registerCmd(new ShutdownCmd(buf, writer, swl));
     registerCmd(new ClearCmd(buf));
@@ -283,3 +284,16 @@ int CommandListener::SetPruneListCmd::runCommand(SocketClient *cli,
 
     return 0;
 }
+
+int CommandListener::getLogSocket() {
+    static const char socketName[] = "logd";
+    int sock = android_get_control_socket(socketName);
+
+    if (sock < 0) {
+        sock = socket_local_server(socketName,
+                                   ANDROID_SOCKET_NAMESPACE_RESERVED,
+                                   SOCK_STREAM);
+    }
+
+    return sock;
+}

logd/CommandListener.h

@@ -31,6 +31,8 @@ public:
     virtual ~CommandListener() {}
 
 private:
+    static int getLogSocket();
+
     class ShutdownCmd : public LogCommand {
         LogBuffer &mBuf;
         LogReader &mReader;

logd/LogListener.cpp

@@ -107,7 +107,15 @@ bool LogListener::onDataAvailable(SocketClient *cli) {
 }
 
 int LogListener::getLogSocket() {
-    int sock = android_get_control_socket("logdw");
+    static const char socketName[] = "logdw";
+    int sock = android_get_control_socket(socketName);
+
+    if (sock < 0) {
+        sock = socket_local_server(socketName,
+                                   ANDROID_SOCKET_NAMESPACE_RESERVED,
+                                   SOCK_DGRAM);
+    }
+
     int on = 1;
     if (setsockopt(sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0) {
         return -1;

logd/LogReader.cpp

@@ -17,13 +17,14 @@
 #include <ctype.h>
 #include <poll.h>
 #include <sys/socket.h>
+
 #include <cutils/sockets.h>
 
 #include "LogReader.h"
 #include "FlushCommand.h"
 
 LogReader::LogReader(LogBuffer *logbuf)
-        : SocketListener("logdr", true)
+        : SocketListener(getLogSocket(), true)
         , mLogbuf(*logbuf)
 { }
 
@@ -167,3 +168,16 @@ void LogReader::doSocketDelete(SocketClient *cli) {
     }
     LogTimeEntry::unlock();
 }
+
+int LogReader::getLogSocket() {
+    static const char socketName[] = "logdr";
+    int sock = android_get_control_socket(socketName);
+
+    if (sock < 0) {
+        sock = socket_local_server(socketName,
+                                   ANDROID_SOCKET_NAMESPACE_RESERVED,
+                                   SOCK_SEQPACKET);
+    }
+
+    return sock;
+}

logd/LogReader.h

@@ -34,6 +34,8 @@ protected:
     virtual bool onDataAvailable(SocketClient *cli);
 
 private:
+    static int getLogSocket();
+
     void doSocketDelete(SocketClient *cli);
 
 };

logd/main.cpp

@@ -36,6 +36,35 @@
 #include "LogListener.h"
 #include "LogAudit.h"
 
+//
+//  The service is designed to be run by init, it does not respond well
+// to starting up manually. When starting up manually the sockets will
+// fail to open typically for one of the following reasons:
+//     EADDRINUSE if logger is running.
+//     EACCESS if started without precautions (below)
+//
+// Here is a cookbook procedure for starting up logd manually assuming
+// init is out of the way, pedantically all permissions and selinux
+// security is put back in place:
+//
+//    setenforce 0
+//    rm /dev/socket/logd*
+//    chmod 777 /dev/socket
+//        # here is where you would attach the debugger or valgrind for example
+//    runcon u:r:logd:s0 /system/bin/logd </dev/null >/dev/null 2>&1 &
+//    sleep 1
+//    chmod 755 /dev/socket
+//    chown logd.logd /dev/socket/logd*
+//    restorecon /dev/socket/logd*
+//    setenforce 1
+//
+// If minimalism prevails, typical for debugging and security is not a concern:
+//
+//    setenforce 0
+//    chmod 777 /dev/socket
+//    logd
+//
+
 static int drop_privs() {
     struct sched_param param;
     memset(&param, 0, sizeof(param));