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BUG#: 7361
TITLE: On start-up, indication providers get SIGHUP
DESCRIPTION: When privilege separation is enabled, start all cimprovagt process from the Executor daemon process, not the cimserver command process.  Also, allow the cimserver command to time out if initialization takes too long.

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#include <fcntl.h>
#include <unistd.h>

#include <Pegasus/Common/Signal.h>
#include <Pegasus/Common/Executor.h>

#define MAX_WAIT_TIME 240

PEGASUS_USING_PEGASUS;
PEGASUS_USING_STD;

Boolean handleSigUsr1 = false;
Boolean graveError = false;

void sigUsr1Handler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig)
{
    handleSigUsr1 = true;
}

void sigTermHandler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig)
{
    graveError= handleSigUsr1=true;
}


//constructor
ServerProcess::ServerProcess() {}

//destructor
ServerProcess::~ServerProcess() {}

// no-ops
void ServerProcess::cimserver_set_process(void* p) {}
void ServerProcess::cimserver_exitRC(int rc) {}
int ServerProcess::cimserver_initialize() { return 1; }

// for all OSes supporting signals provide a cimserver_wait function
// that waits to be awakened by signal PEGASUS_SIGTERM or PEGASUS_SIGHUP
#ifdef PEGASUS_HAS_SIGNALS
int ServerProcess::cimserver_wait()
{
    int sig = -1;
    sigset_t set;
    sigemptyset(&set);
    sigaddset(&set, PEGASUS_SIGTERM);
    sigaddset(&set, PEGASUS_SIGHUP);
    errno = 0;
    do
    {
#if defined(PEGASUS_OS_ZOS) || defined(PEGASUS_OS_SOLARIS)
        sig = sigwait(&set);
#else // else for platforms = LINUX, HPUX, AIX
        sigwait(&set, &sig);
#endif
    } while (errno == EINTR);
    return sig;
}
#else
int ServerProcess::cimserver_wait() { return 1; }
#endif

String ServerProcess::getHome() { return String::EMPTY; }

// daemon_init , RW Stevens, "Advance UNIX Programming"

int ServerProcess::cimserver_fork()
{
    umask(S_IRWXG | S_IRWXO);

    if (Executor::detectExecutor() == 0)
    {
        // We don't need to fork if we're running with Privilege Separation
        return 0;
    }

    getSigHandle()->registerHandler(SIGTERM, sigTermHandler);
    getSigHandle()->activate(SIGTERM);
    getSigHandle()->registerHandler(PEGASUS_SIGUSR1, sigUsr1Handler);
    getSigHandle()->activate(PEGASUS_SIGUSR1);

    pid_t pid;
    if( (pid = fork() ) < 0)
    {
        getSigHandle()->deactivate(PEGASUS_SIGUSR1);
        getSigHandle()->deactivate(SIGTERM);
        return -1;
    }
    else if (pid != 0)
    {
        //
        // parent wait for child
        // if there is a problem with signal, parent process terminates
        // when waitTime expires
        //
        Uint32 waitTime = MAX_WAIT_TIME;

        while (!handleSigUsr1 && waitTime > 0)
        {
            sleep(1);
            waitTime--;
        }

        if (!handleSigUsr1)
        {
            MessageLoaderParms parms(
                "src.Service.ServerProcessUnix.CIMSERVER_START_TIMEOUT",
                "The cimserver command timed out waiting for the CIM server "
                    "to start.");
            PEGASUS_STD(cerr) << MessageLoader::getMessage(parms) <<
                PEGASUS_STD(endl);
        }
        exit(graveError);
    }

    setsid();
    umask(S_IRWXG | S_IRWXO);

    // spawned daemon process doesn't need the old signal handlers of its parent
    getSigHandle()->deactivate(PEGASUS_SIGUSR1);
    getSigHandle()->deactivate(SIGTERM);

    return 0;
}


// notify parent process to terminate so user knows that cimserver
// is ready to serve CIM requests.
void ServerProcess::notify_parent(int id)
{
    pid_t ppid = getppid();
    if (id)
    {
        kill(ppid, SIGTERM);
    }
    else
    {
        if (Executor::detectExecutor() == 0)
        {
            Executor::daemonizeExecutor();
        }
        else
        {
            kill(ppid, PEGASUS_SIGUSR1);
        }
    }
}


// Platform specific run
int ServerProcess::platform_run(
    int argc,
    char** argv,
    Boolean shutdownOption,
    Boolean debugOutputOption)
{
    return cimserver_run(argc, argv, shutdownOption, debugOutputOption);
}