[CP] Enable auto start after deb installation and reboot, restrict on…

…ly one hdcp daemon instance(CL#792390)

Enable auto start after deb installation and reboot, restrict only one hdcp daemon instance

Change-Id: I4bb0f0fdc8a431828d1533e62ffe56e12990344e

CMakeLists.txt

@@ -61,23 +61,26 @@ if (DEFINED CMAKE_BUILD_TYPE AND "${CMAKE_BUILD_TYPE}" STREQUAL "Release")
     message(STATUS "cmake build type is \"${CMAKE_BUILD_TYPE}\"")
 endif ()
 
-set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}")
-set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}")
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}")
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
 
-add_subdirectory(common ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/common)
+add_subdirectory(common ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY}/common)
 add_subdirectory(sdk ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/sdk)
-add_subdirectory(daemon ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/daemon)
+add_subdirectory(daemon ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/daemon)
 
 set(CMAKE_INSTALL_BINDIR /usr/bin)
 set(CMAKE_INSTALL_LIBDIR /usr/lib/x86_64-linux-gnu)
+set(CMAKE_SYSTEMD_INSTALL_DIR /etc/systemd/system)
+install (PROGRAMS ${CMAKE_BINARY_DIR}/hdcpd DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT cp)
 install (FILES ${CMAKE_BINARY_DIR}/libhdcpsdk.so DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT cp)
-install (FILES ${CMAKE_BINARY_DIR}/hdcpd DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT cp)
+install (FILES ${CMAKE_SOURCE_DIR}/config/hdcpd.service DESTINATION ${CMAKE_SYSTEMD_INSTALL_DIR} COMPONENT cp)
 
 set(CPACK_GENERATOR "DEB")
 set(CPACK_PACKAGE_NAME "intel-uapi-hdcp")
 set(CPACK_PACKAGE_VENDOR "Intel")
 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "intel-uapi-hdcp deb package for internal usage only")
+SET(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA ${CMAKE_SOURCE_DIR}/config/postinst)
 
 set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Intel")
 include(CPack)

config/hdcpd.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=hdcp daemon
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/hdcpd
+User=root
+
+[Install]
+WantedBy=multi-user.target

config/postinst

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+systemctl enable hdcpd.service
+systemctl start hdcpd.service

daemon/main.cpp

@@ -35,6 +35,7 @@
 #include <dirent.h>
 #include <sys/ioctl.h>
 #include <fcntl.h>
+#include <iostream>
 
 #include "hdcpdef.h"
 #include "srm.h"
@@ -44,6 +45,45 @@
 
 FILE *dmLog = nullptr;
 
+bool AlreadyRunning()
+{
+    const std::string pidFile = "/var/run/hdcpd.pid";
+
+    int fd = open(pidFile.c_str(),
+                O_RDWR | O_CREAT,
+                S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+    if (fd < 0)
+    {
+        HDCP_ASSERTMESSAGE("Could not open pid file : %s\n", pidFile.c_str());
+        close(fd);
+        return true;
+    }
+
+    struct flock fl;
+    fl.l_type = F_WRLCK;
+    fl.l_start = 0;
+    fl.l_whence = SEEK_SET;
+    fl.l_len = 0;
+
+    if (fcntl(fd, F_SETLK, &fl) < 0)
+    {
+        HDCP_ASSERTMESSAGE("Could not lock pid file\n");
+        close(fd);
+        return true;
+    }
+
+    std::string pid = std::to_string(getpid());
+    if (write(fd, pid.c_str(), pid.length()) < 0)
+    {
+        HDCP_ASSERTMESSAGE("Could not write pid file\n");
+        close(fd);
+        return true;
+    }
+
+    close(fd);
+    return false;
+}
+
 int32_t daemon_init(void)
 {
     pid_t pid = fork();
@@ -171,6 +211,12 @@ int32_t main(void)
     int32_t ret = -1;
     struct passwd *mediaId = getpwnam("media");
 
+    if (AlreadyRunning())
+    {
+        HDCP_ASSERTMESSAGE("hdcp aleady already running\n");
+        return 1;
+    }
+
     if (nullptr == mediaId)
     {
         HDCP_ASSERTMESSAGE(