path: root/indra/newview/llappviewerlinux.cpp

/**
 * @file llappviewerlinux.cpp
 * @brief The LLAppViewerLinux class definitions
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llappviewerlinux.h"

#include "llcommandlineparser.h"

#include "lldiriterator.h"
#include "llurldispatcher.h"        // SLURL from other app instance
#include "llviewernetwork.h"
#include "llviewercontrol.h"
#include "llwindowsdl.h"
#include "llmd5.h"
#include "llfindlocale.h"

#include <exception>

#if LL_DBUS_ENABLED
# include "llappviewerlinux_api_dbus.h"

// regrettable hacks to give us better runtime compatibility with older systems inside llappviewerlinux_api.h:
#define llg_return_if_fail(COND) do{if (!(COND)) return;}while(0)
#undef g_return_if_fail
#define g_return_if_fail(COND) llg_return_if_fail(COND)
// The generated API
# include "llappviewerlinux_api.h"
#endif

namespace
{
    int gArgC = 0;
    char **gArgV = NULL;
    void (*gOldTerminateHandler)() = NULL;
}


static void exceptionTerminateHandler()
{
    // reinstall default terminate() handler in case we re-terminate.
    if (gOldTerminateHandler) std::set_terminate(gOldTerminateHandler);
    // treat this like a regular viewer crash, with nice stacktrace etc.
    long *null_ptr;
    null_ptr = 0;
    *null_ptr = 0xDEADBEEF; //Force an exception that will trigger breakpad.
    // we've probably been killed-off before now, but...
    gOldTerminateHandler(); // call old terminate() handler
}

int main( int argc, char **argv )
{
    gArgC = argc;
    gArgV = argv;

    LLAppViewer* viewer_app_ptr = new LLAppViewerLinux();

    // install unexpected exception handler
    gOldTerminateHandler = std::set_terminate(exceptionTerminateHandler);

    bool ok = viewer_app_ptr->init();
    if(!ok)
    {
        LL_WARNS() << "Application init failed." << LL_ENDL;
        return -1;
    }

        // Run the application main loop
    while (! viewer_app_ptr->frame())
    {}

    if (!LLApp::isError())
    {
        //
        // We don't want to do cleanup here if the error handler got called -
        // the assumption is that the error handler is responsible for doing
        // app cleanup if there was a problem.
        //
        viewer_app_ptr->cleanup();
    }
    delete viewer_app_ptr;
    viewer_app_ptr = NULL;
    return 0;
}

LLAppViewerLinux::LLAppViewerLinux()
{
}

LLAppViewerLinux::~LLAppViewerLinux()
{
}

bool LLAppViewerLinux::init()
{
    // g_thread_init() must be called before *any* use of glib, *and*
    // before any mutexes are held, *and* some of our third-party
    // libraries likes to use glib functions; in short, do this here
    // really early in app startup!
#ifndef LL_USESYSTEMLIBS
    if (!g_thread_supported ()) g_thread_init (NULL);
#endif

    bool success = LLAppViewer::init();

#if LL_SEND_CRASH_REPORTS
    if (success)
    {
        LLAppViewer* pApp = LLAppViewer::instance();
        pApp->initCrashReporting();
    }
#endif

    return success;
}

bool LLAppViewerLinux::restoreErrorTrap()
{
    // *NOTE:Mani there is a case for implementing this on the mac.
    // Linux doesn't need it to my knowledge.
    return true;
}

/////////////////////////////////////////
#if LL_DBUS_ENABLED

typedef struct
{
        GObjectClass parent_class;
} ViewerAppAPIClass;

static void viewerappapi_init(ViewerAppAPI *server);
static void viewerappapi_class_init(ViewerAppAPIClass *klass);

///

// regrettable hacks to give us better runtime compatibility with older systems in general
static GType llg_type_register_static_simple_ONCE(GType parent_type,
                          const gchar *type_name,
                          guint class_size,
                          GClassInitFunc class_init,
                          guint instance_size,
                          GInstanceInitFunc instance_init,
                          GTypeFlags flags)
{
    static GTypeInfo type_info;
    memset(&type_info, 0, sizeof(type_info));

    type_info.class_size = class_size;
    type_info.class_init = class_init;
    type_info.instance_size = instance_size;
    type_info.instance_init = instance_init;

    return g_type_register_static(parent_type, type_name, &type_info, flags);
}
#define llg_intern_static_string(S) (S)
#define g_intern_static_string(S) llg_intern_static_string(S)
#define g_type_register_static_simple(parent_type, type_name, class_size, class_init, instance_size, instance_init, flags) llg_type_register_static_simple_ONCE(parent_type, type_name, class_size, class_init, instance_size, instance_init, flags)

G_DEFINE_TYPE(ViewerAppAPI, viewerappapi, G_TYPE_OBJECT);

void viewerappapi_class_init(ViewerAppAPIClass *klass)
{
}

static bool dbus_server_init = false;

void viewerappapi_init(ViewerAppAPI *server)
{
    // Connect to the default DBUS, register our service/API.

    if (!dbus_server_init)
    {
        GError *error = NULL;

        server->connection = lldbus_g_bus_get(DBUS_BUS_SESSION, &error);
        if (server->connection)
        {
            lldbus_g_object_type_install_info(viewerappapi_get_type(), &dbus_glib_viewerapp_object_info);

            lldbus_g_connection_register_g_object(server->connection, VIEWERAPI_PATH, G_OBJECT(server));

            DBusGProxy *serverproxy = lldbus_g_proxy_new_for_name(server->connection, DBUS_SERVICE_DBUS, DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS);

            guint request_name_ret_unused;
            // akin to org_freedesktop_DBus_request_name
            if (lldbus_g_proxy_call(serverproxy, "RequestName", &error, G_TYPE_STRING, VIEWERAPI_SERVICE, G_TYPE_UINT, 0, G_TYPE_INVALID, G_TYPE_UINT, &request_name_ret_unused, G_TYPE_INVALID))
            {
                // total success.
                dbus_server_init = true;
            }
            else
            {
                LL_WARNS() << "Unable to register service name: " << error->message << LL_ENDL;
            }

            g_object_unref(serverproxy);
        }
        else
        {
            g_warning("Unable to connect to dbus: %s", error->message);
        }

        if (error)
            g_error_free(error);
    }
}

gboolean viewer_app_api_GoSLURL(ViewerAppAPI *obj, gchar *slurl, gboolean **success_rtn, GError **error)
{
    bool success = false;

    LL_INFOS() << "Was asked to go to slurl: " << slurl << LL_ENDL;

    std::string url = slurl;
    LLMediaCtrl* web = NULL;
    const bool trusted_browser = false;
    if (LLURLDispatcher::dispatch(url, "", web, trusted_browser))
    {
        // bring window to foreground, as it has just been "launched" from a URL
        // todo: hmm, how to get there from here?
        //xxx->mWindow->bringToFront();
        success = true;
    }

    *success_rtn = g_new (gboolean, 1);
    (*success_rtn)[0] = (gboolean)success;

    return TRUE; // the invokation succeeded, even if the actual dispatch didn't.
}

///

//virtual
bool LLAppViewerLinux::initSLURLHandler()
{
    if (!grab_dbus_syms(DBUSGLIB_DYLIB_DEFAULT_NAME))
    {
        return false; // failed
    }

    g_type_init();

    //ViewerAppAPI *api_server = (ViewerAppAPI*)
    g_object_new(viewerappapi_get_type(), NULL);

    return true;
}

//virtual
bool LLAppViewerLinux::sendURLToOtherInstance(const std::string& url)
{
    if (!grab_dbus_syms(DBUSGLIB_DYLIB_DEFAULT_NAME))
    {
        return false; // failed
    }

    bool success = false;
    DBusGConnection *bus;
    GError *error = NULL;

    g_type_init();

    bus = lldbus_g_bus_get (DBUS_BUS_SESSION, &error);
    if (bus)
    {
        gboolean rtn = FALSE;
        DBusGProxy *remote_object =
            lldbus_g_proxy_new_for_name(bus, VIEWERAPI_SERVICE, VIEWERAPI_PATH, VIEWERAPI_INTERFACE);

        if (lldbus_g_proxy_call(remote_object, "GoSLURL", &error,
                    G_TYPE_STRING, url.c_str(), G_TYPE_INVALID,
                       G_TYPE_BOOLEAN, &rtn, G_TYPE_INVALID))
        {
            success = rtn;
        }
        else
        {
            LL_INFOS() << "Call-out to other instance failed (perhaps not running): " << error->message << LL_ENDL;
        }

        g_object_unref(G_OBJECT(remote_object));
    }
    else
    {
        LL_WARNS() << "Couldn't connect to session bus: " << error->message << LL_ENDL;
    }

    if (error)
        g_error_free(error);

    return success;
}

#else // LL_DBUS_ENABLED
bool LLAppViewerLinux::initSLURLHandler()
{
    return false; // not implemented without dbus
}
bool LLAppViewerLinux::sendURLToOtherInstance(const std::string& url)
{
    return false; // not implemented without dbus
}
#endif // LL_DBUS_ENABLED

void LLAppViewerLinux::initCrashReporting(bool reportFreeze)
{
    std::string cmd =gDirUtilp->getExecutableDir();
    cmd += gDirUtilp->getDirDelimiter();
//#if LL_LINUX
    cmd += "linux-crash-logger.bin";
/*
#else
# error Unknown platform
#endif
*/

    std::stringstream pid_str;
    pid_str <<  LLApp::getPid();
    std::string logdir = gDirUtilp->getExpandedFilename(LL_PATH_DUMP, "");
    std::string appname = gDirUtilp->getExecutableFilename();
    // launch the actual crash logger
    const char * cmdargv[] =
        {cmd.c_str(),
         "-user",
         (char*)LLGridManager::getInstance()->getGridId().c_str(),
         "-name",
         LLAppViewer::instance()->getSecondLifeTitle().c_str(),
         "-pid",
         pid_str.str().c_str(),
         "-dumpdir",
         logdir.c_str(),
         "-procname",
         appname.c_str(),
         NULL};
    fflush(NULL);

    pid_t pid = fork();
    if (pid == 0)
    { // child
        execv(cmd.c_str(), (char* const*) cmdargv);     /* Flawfinder: ignore */
        LL_WARNS() << "execv failure when trying to start " << cmd << LL_ENDL;
        _exit(1); // avoid atexit()
    }
    else
    {
        if (pid > 0)
        {
            // DO NOT wait for child proc to die; we want
            // the logger to outlive us while we quit to
            // free up the screen/keyboard/etc.
            ////int childExitStatus;
            ////waitpid(pid, &childExitStatus, 0);
        }
        else
        {
            LL_WARNS() << "fork failure." << LL_ENDL;
        }
    }
    // Sometimes signals don't seem to quit the viewer.  Also, we may
    // have been called explicitly instead of from a signal handler.
    // Make sure we exit so as to not totally confuse the user.
    //_exit(1); // avoid atexit(), else we may re-crash in dtors.
}

bool LLAppViewerLinux::beingDebugged()
{
    static enum {unknown, no, yes} debugged = unknown;

    if (debugged == unknown)
    {
        pid_t ppid = getppid();
        char *name;
        int ret;

        ret = asprintf(&name, "/proc/%d/exe", ppid);
        if (ret != -1)
        {
            char buf[1024];
            ssize_t n;

            n = readlink(name, buf, sizeof(buf) - 1);
            if (n != -1)
            {
                char *base = strrchr(buf, '/');
                buf[n + 1] = '\0';
                if (base == NULL)
                {
                    base = buf;
                } else {
                    base += 1;
                }

                if (strcmp(base, "gdb") == 0)
                {
                    debugged = yes;
                }
            }
            free(name);
        }
    }

    return debugged == yes;
}

void LLAppViewerLinux::initLoggingAndGetLastDuration()
{
    // Remove the last stack trace, if any
    // This file is no longer created, since the move to Google Breakpad
    // The code is left here to clean out any old state in the log dir
    std::string old_stack_file =
        gDirUtilp->getExpandedFilename(LL_PATH_LOGS,"stack_trace.log");
    LLFile::remove(old_stack_file);

    LLAppViewer::initLoggingAndGetLastDuration();
}

bool LLAppViewerLinux::initParseCommandLine(LLCommandLineParser& clp)
{
    if (!clp.parseCommandLine(gArgC, gArgV))
    {
        return false;
    }

    // Find the system language.
    FL_Locale *locale = NULL;
    FL_Success success = FL_FindLocale(&locale, FL_MESSAGES);
    if (success != 0)
    {
        if (success >= 2 && locale->lang) // confident!
        {
            LL_INFOS("AppInit") << "Language " << ll_safe_string(locale->lang) << LL_ENDL;
            LL_INFOS("AppInit") << "Location " << ll_safe_string(locale->country) << LL_ENDL;
            LL_INFOS("AppInit") << "Variant " << ll_safe_string(locale->variant) << LL_ENDL;

            LLControlVariable* c = gSavedSettings.getControl("SystemLanguage");
            if(c)
            {
                c->setValue(std::string(locale->lang), false);
            }
        }
    }
    FL_FreeLocale(&locale);

    return true;
}

std::string LLAppViewerLinux::generateSerialNumber()
{
    char serial_md5[MD5HEX_STR_SIZE];
    serial_md5[0] = 0;
    std::string best;
    std::string uuiddir("/dev/disk/by-uuid/");

    // trawl /dev/disk/by-uuid looking for a good-looking UUID to grab
    std::string this_name;

    LLDirIterator iter(uuiddir, "*");
    while (iter.next(this_name))
    {
        if (this_name.length() > best.length() ||
            (this_name.length() == best.length() &&
             this_name > best))
        {
            // longest (and secondarily alphabetically last) so far
            best = this_name;
        }
    }

    // we don't return the actual serial number, just a hash of it.
    LLMD5 md5( reinterpret_cast<const unsigned char*>(best.c_str()) );
    md5.hex_digest(serial_md5);

    return serial_md5;
}