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boinc/clientscr/screensaver.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2020 University of California
//
// BOINC 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,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 BOINC. If not, see <http://www.gnu.org/licenses/>.
// Screensaver coordinator.
// Alternates between a "default screensaver"
// and application graphics for running jobs.
// Periods are configurable via config file "ss_config.xml".
// See http://boinc.berkeley.edu/trac/wiki/ScreensaverEnhancements
#ifdef _WIN32
#include "boinc_win.h"
#endif
#ifdef __APPLE__
#define VERBOSE 0
#include <Carbon/Carbon.h>
#include <sys/wait.h>
#include <app_ipc.h>
#include <malloc/malloc.h>
#include <pthread.h>
#include <sys/stat.h>
extern pthread_mutex_t saver_mutex;
#endif
// Common application includes
//
#include "diagnostics.h"
#include "common_defs.h"
#include "util.h"
#include "common_defs.h"
#include "filesys.h"
#include "error_numbers.h"
#include "gui_rpc_client.h"
#include "str_util.h"
#include "str_replace.h"
#include "screensaver.h"
#ifdef __APPLE__
#undef BOINCTRACE
#if VERBOSE
#define BOINCTRACE print_to_log_file
#else
#define BOINCTRACE(...)
#endif
#define _T
#endif
// Platform specific application includes
//
#if defined(_WIN32)
#include "screensaver_win.h"
typedef HANDLE GFXAPP_ID;
#define DataMgmtProcType DWORD WINAPI
#elif defined(__APPLE__)
#include "Mac_Saver_Module.h"
#include "shmem.h"
typedef int GFXAPP_ID;
#define DataMgmtProcType void*
#endif
#ifdef _WIN32
// Allow for Unicode wide characters
#define PATH_SEPARATOR (_T("\\"))
#define THE_DEFAULT_SS_EXECUTABLE (_T(DEFAULT_SS_EXECUTABLE))
#define THE_SS_CONFIG_FILE (_T(SS_CONFIG_FILE))
#define DEFAULT_GFX_CANT_CONNECT ERR_CONNECT
#else
// Using (_T()) here causes compiler errors on Mac
#define PATH_SEPARATOR "/"
#define THE_DEFAULT_SS_EXECUTABLE DEFAULT_SS_EXECUTABLE
#define THE_SS_CONFIG_FILE SS_CONFIG_FILE
#define DEFAULT_GFX_CANT_CONNECT (ERR_CONNECT & 0xff)
#endif
// Flags for testing & debugging
#define SIMULATE_NO_GRAPHICS 0
RESULT* graphics_app_result_ptr = NULL;
#ifdef __APPLE__
pid_t* pid_from_shmem = NULL;
#endif
bool CScreensaver::is_same_task(RESULT* taska, RESULT* taskb) {
if ((taska == NULL) || (taskb == NULL)) return false;
if (strcmp(taska->name, taskb->name)) return false;
if (strcmp(taska->project_url, taskb->project_url)) return false;
return true;
}
int CScreensaver::count_active_graphic_apps(RESULTS& res, RESULT* exclude) {
int i = 0;
unsigned int graphics_app_count = 0;
// Count the number of active graphics-capable apps excluding the specified result.
// If exclude is NULL, don't exclude any results.
//
for (i = res.results.size()-1; i >=0 ; i--) {
BOINCTRACE(_T("count_active_graphic_apps -- active task detected\n"));
BOINCTRACE(
_T("count_active_graphic_apps -- name = '%s', path = '%s'\n"),
res.results[i]->name, res.results[i]->graphics_exec_path
);
if (!strlen(res.results[i]->graphics_exec_path)) continue;
if (is_same_task(res.results[i], exclude)) continue;
#ifdef __APPLE__
// Remove it from the vector if incompatible with current version of OS X
if (isIncompatible(res.results[i]->graphics_exec_path)) {
BOINCTRACE(
_T("count_active_graphic_apps -- removing incompatible name = '%s', path = '%s'\n"),
res.results[i]->name, res.results[i]->graphics_exec_path
);
RESULT *rp = res.results[i];
res.results.erase(res.results.begin()+i);
delete rp;
continue;
}
#endif
BOINCTRACE(_T("count_active_graphic_apps -- active task detected w/graphics\n"));
graphics_app_count++;
}
return graphics_app_count;
}
// Choose a random graphics application out of the vector.
// Exclude the specified result unless it is the only candidate.
// If exclude is NULL or an empty string, don't exclude any results.
//
RESULT* CScreensaver::get_random_graphics_app(
RESULTS& res, RESULT* exclude
) {
RESULT* rp = NULL;
unsigned int i = 0;
unsigned int graphics_app_count = 0;
unsigned int random_selection = 0;
unsigned int current_counter = 0;
RESULT *avoid = exclude;
BOINCTRACE(_T("get_random_graphics_app -- Function Start\n"));
graphics_app_count = count_active_graphic_apps(res, avoid);
BOINCTRACE(_T("get_random_graphics_app -- graphics_app_count = '%d'\n"), graphics_app_count);
// If no graphics app found other than the one excluded, count again without excluding any
if ((0 == graphics_app_count) && (avoid != NULL)) {
avoid = NULL;
graphics_app_count = count_active_graphic_apps(res, avoid);
}
// If no graphics app was found, return NULL
if (0 == graphics_app_count) {
goto CLEANUP;
}
// Choose which application to display.
//
random_selection = (rand() % graphics_app_count) + 1;
BOINCTRACE(_T("get_random_graphics_app -- random_selection = '%d'\n"), random_selection);
// find the chosen graphics application.
//
for (i = 0; i < res.results.size(); i++) {
if (!strlen(res.results[i]->graphics_exec_path)) continue;
if (is_same_task(res.results[i], avoid)) continue;
current_counter++;
if (current_counter == random_selection) {
rp = res.results[i];
break;
}
}
CLEANUP:
BOINCTRACE(_T("get_random_graphics_app -- Function End\n"));
return rp;
}
#ifdef __APPLE__
void CScreensaver::markAsIncompatible(char *gfxAppPath) {
char *buf = (char *)malloc(strlen(gfxAppPath)+1);
if (buf) {
strlcpy(buf, gfxAppPath, malloc_size(buf));
m_vIncompatibleGfxApps.push_back(buf);
BOINCTRACE(_T("markAsIncompatible -- path = '%s'\n"), gfxAppPath);
}
}
bool CScreensaver::isIncompatible(char *appPath) {
unsigned int i = 0;
for (i = 0; i < m_vIncompatibleGfxApps.size(); i++) {
BOINCTRACE(
_T("isIncompatible -- comparing incompatible path '%s' to candidate path %s\n"),
m_vIncompatibleGfxApps[i], appPath
);
if (strcmp(m_vIncompatibleGfxApps[i], appPath) == 0) {
return true;
}
}
return false;
}
#endif
// Launch a project (science) graphics application
//
int CScreensaver::launch_screensaver(RESULT* rp, GFXAPP_ID& graphics_application) {
int retval = 0;
if (strlen(rp->graphics_exec_path)) {
// V6 Graphics
#ifdef __APPLE__
if (gIsCatalina) {
// As of OS 10.15 (Catalina) screensavers can no longer:
// - launch apps that run setuid or setgid
// - launch apps downloaded from the Internet which have not been
// specifically approved by the user via Gatekeeper.
// So instead of launching graphics apps via gfx_switcher, we send an
// RPC to the client asking the client to launch them via gfx_switcher.
// See comments in gfx_switcher.cpp for a more detailed explanation.
// We have tested this on OS 10.13 High Sierra and it works there, too
//
retval = rpc->run_graphics_app("runfullscreen", rp->slot, gUserName);
for (int i=0; i<800; i++) {
boinc_sleep(0.01); // Wait 8 seconds max
if (*pid_from_shmem != 0) {
graphics_application = *pid_from_shmem;
break;
}
}
// fprintf(stderr, "launch_screensaver got pid %d\n", graphics_application);
// Inform our helper app what we launched
fprintf(m_gfx_Cleanup_IPC, "%d\n", graphics_application);
fflush(m_gfx_Cleanup_IPC);
} else {
// For sandbox security, use gfx_switcher to launch gfx app
// as user boinc_project and group boinc_project.
//
// For unknown reasons, the graphics application exits with
// "RegisterProcess failed (error = -50)" unless we pass its
// full path twice in the argument list to execv.
char* argv[5];
argv[0] = "gfx_Switcher";
argv[1] = "-launch_gfx";
argv[2] = strrchr(rp->slot_path, '/');
if (*argv[2]) argv[2]++; // Point to the slot number in ascii
argv[3] = "--fullscreen";
argv[4] = 0;
retval = run_program(
rp->slot_path,
m_gfx_Switcher_Path,
4,
argv,
0,
graphics_application
);
}
if (graphics_application) {
launchedGfxApp(rp->graphics_exec_path, graphics_application, rp->slot);
}
#else
char* argv[3];
argv[0] = rp->graphics_exec_path;
argv[1] = "--fullscreen";
argv[2] = 0;
retval = run_program(
rp->slot_path,
rp->graphics_exec_path,
2,
argv,
0,
graphics_application
);
#endif
}
return retval;
}
// Terminate any screensaver graphics application
//
int CScreensaver::terminate_v6_screensaver(GFXAPP_ID& graphics_application, RESULT* rp) {
int retval = 0;
int i;
#ifdef __APPLE__
pid_t thePID;
if (gIsCatalina) {
// As of OS 10.15 (Catalina) screensavers can no longer launch apps
// that run setuid or setgid. So instead of killing graphics apps
// via gfx_switcher, we send an RPC to the client asking the client
// to kill them via switcher.
// We have tested this on OS 10.13 High Sierra and it works there, too
//
int ignore;
if (graphics_application == 0) return 0;
// MUTEX may help prevent crashes when terminating an older gfx app which
// we were displaying using CGWindowListCreateImage under OS X >= 10.13
// Also prevents reentry when called from our other thread
pthread_mutex_lock(&saver_mutex);
thePID = graphics_application;
// fprintf(stderr, "stopping pid %d\n", thePID);
retval = rpc->run_graphics_app("stop", thePID, gUserName);
//kill_program(graphics_application);
// Inform our helper app that we have stopped current graphics app
fprintf(m_gfx_Cleanup_IPC, "0\n");
fflush(m_gfx_Cleanup_IPC);
launchedGfxApp("", 0, -1);
for (i=0; i<200; i++) {
boinc_sleep(0.01); // Wait 2 seconds max
if (HasProcessExited(graphics_application, ignore)) {
break;
}
}
pthread_mutex_unlock(&saver_mutex);
} else {
// Under sandbox security, use gfx_switcher to kill default gfx app
// as user boinc_master and group boinc_master (for default gfx app)
// or user boinc_project and group boinc_project (for project gfx
// apps.) The man page for kill() says the user ID of the process
// sending the signal must match that of the target process, though
// in practice that seems not to be true on the Mac.
char current_dir[PATH_MAX];
char gfx_pid[16];
if (graphics_application == 0) return 0;
// MUTEX may help prevent crashes when terminating an older gfx app which
// we were displaying using CGWindowListCreateImage under OS X >= 10.13
// Also prevents reentry when called from our other thread
pthread_mutex_lock(&saver_mutex);
sprintf(gfx_pid, "%d", graphics_application);
getcwd( current_dir, sizeof(current_dir));
char* argv[4];
argv[0] = "gfx_switcher";
argv[1] = "-kill_gfx";
argv[2] = gfx_pid;
argv[3] = 0;
retval = run_program(
current_dir,
m_gfx_Switcher_Path,
3,
argv,
0,
thePID
);
if (graphics_application) {
launchedGfxApp("", 0, -1);
}
for (i=0; i<200; i++) {
boinc_sleep(0.01); // Wait 2 seconds max
// Prevent gfx_switcher from becoming a zombie
if (waitpid(thePID, 0, WNOHANG) == thePID) {
break;
}
}
pthread_mutex_unlock(&saver_mutex);
}
#endif
#ifdef _WIN32
HWND hBOINCGraphicsWindow = FindWindow(BOINC_WINDOW_CLASS_NAME, NULL);
if (hBOINCGraphicsWindow) {
CloseWindow(hBOINCGraphicsWindow);
Sleep(1000);
hBOINCGraphicsWindow = FindWindow(BOINC_WINDOW_CLASS_NAME, NULL);
if (hBOINCGraphicsWindow) {
kill_program(graphics_application);
}
}
#endif
// For safety, call kill_program even under Apple sandbox security
kill_program(graphics_application);
return retval;
}
// Terminate the project (science) graphics application
//
int CScreensaver::terminate_screensaver(GFXAPP_ID& graphics_application, RESULT* rp) {
int retval = 0;
if (graphics_application) {
// V6 Graphics
if (m_bScience_gfx_running) {
terminate_v6_screensaver(graphics_application, rp);
}
}
return retval;
}
// Launch the default graphics application
//
int CScreensaver::launch_default_screensaver(char *dir_path, GFXAPP_ID& graphics_application) {
int retval = 0;
int num_args;
#ifdef __APPLE__
if (gIsCatalina) {
// As of OS 10.15 (Catalina) screensavers can no longer:
// - launch apps that run setuid or setgid
// - launch apps downloaded from the Internet which have not been
// specifically approved by the user via Gatekeeper.
// So instead of launching graphics apps via gfx_switcher, we send an
// RPC to the client asking the client to launch them via gfx_switcher.
// See comments in gfx_switcher.cpp for a more detailed explanation.
// We have tested this on OS 10.13 High Sierra and it works there, too
//
int thePID = -1;
retval = rpc->run_graphics_app("runfullscreen", thePID, gUserName);
for (int i=0; i<800; i++) {
boinc_sleep(0.01); // Wait 8 seconds max
if (*pid_from_shmem != 0) {
graphics_application = *pid_from_shmem;
break;
}
}
// fprintf(stderr, "launch_screensaver got pid %d\n", graphics_application);
// Inform our helper app what we launched
fprintf(m_gfx_Cleanup_IPC, "%d\n", graphics_application);
fflush(m_gfx_Cleanup_IPC);
} else {
// For sandbox security, use gfx_switcher to launch default
// gfx app as user boinc_master and group boinc_master.
char* argv[6];
argv[0] = "gfx_switcher";
argv[1] = "-default_gfx";
argv[2] = THE_DEFAULT_SS_EXECUTABLE; // Will be changed by gfx_switcher
argv[3] = "--fullscreen";
argv[4] = 0;
argv[5] = 0;
if (!m_bConnected) {
BOINCTRACE(_T("launch_default_screensaver using --retry_connect argument\n"));
argv[4] = "--retry_connect";
num_args = 5;
} else {
num_args = 4;
}
retval = run_program(
dir_path,
m_gfx_Switcher_Path,
num_args,
argv,
0,
graphics_application
);
}
if (graphics_application) {
launchedGfxApp("boincscr", graphics_application, -1);
}
BOINCTRACE(_T("launch_default_screensaver returned %d\n"), retval);
#else
char* argv[4];
char full_path[1024];
strlcpy(full_path, dir_path, sizeof(full_path));
strlcat(full_path, PATH_SEPARATOR, sizeof(full_path));
strlcat(full_path, THE_DEFAULT_SS_EXECUTABLE, sizeof(full_path));
argv[0] = full_path;
argv[1] = "--fullscreen";
argv[2] = 0;
argv[3] = 0;
if (!m_bConnected) {
BOINCTRACE(_T("launch_default_screensaver using --retry_connect argument\n"));
argv[2] = "--retry_connect";
num_args = 3;
} else {
num_args = 2;
}
retval = run_program(
dir_path,
full_path,
num_args,
argv,
0,
graphics_application
);
BOINCTRACE(_T("launch_default_screensaver %s returned %d\n"), full_path, retval);
#endif
return retval;
}
// Terminate the default graphics application
//
int CScreensaver::terminate_default_screensaver(GFXAPP_ID& graphics_application) {
int retval = 0;
if (! graphics_application) return 0;
retval = terminate_v6_screensaver(graphics_application, NULL);
return retval;
}
// If we cannot connect to the core client:
// - we retry connecting every 10 seconds
// - we launch the default graphics application with the argument --retry_connect, so
// it will continue running and will also retry connecting every 10 seconds.
//
// If we successfully connected to the core client, launch the default graphics application
// without the argument --retry_connect. If it can't connect, it will return immediately
// with the exit code ERR_CONNECT. In that case, we assume it was blocked by a firewall
// and so we run only project (science) graphics.
DataMgmtProcType CScreensaver::DataManagementProc() {
int retval = 0;
int suspend_reason = 0;
RESULT* theResult = NULL;
RESULT previous_result;
// previous_result_ptr = &previous_result when previous_result is valid, else NULL
RESULT* previous_result_ptr = NULL;
int iResultCount = 0;
int iIndex = 0;
double default_phase_start_time = 0.0;
double science_phase_start_time = 0.0;
double last_change_time = 0.0;
// If we run default screensaver during science phase because no science graphics
// are available, then shorten next default graphics phase by that much time.
double default_saver_start_time_in_science_phase = 0.0;
double default_saver_duration_in_science_phase = 0.0;
SS_PHASE ss_phase = DEFAULT_SS_PHASE;
bool switch_to_default_gfx = false;
bool killing_default_gfx = false;
int exit_status = 0;
char* default_ss_dir_path = NULL;
char full_path[1024];
BOINCTRACE(_T("CScreensaver::DataManagementProc - Display screen saver loading message\n"));
SetError(TRUE, SCRAPPERR_BOINCSCREENSAVERLOADING); // No GFX App is running: show moving BOINC logo
#ifdef _WIN32
m_tThreadCreateTime = time(0);
// Set the starting point for iterating through the results
m_iLastResultShown = 0;
m_tLastResultChangeTime = 0;
#endif
m_bDefault_ss_exists = false;
m_bScience_gfx_running = false;
m_bDefault_gfx_running = false;
m_bShow_default_ss_first = false;
graphics_app_result_ptr = NULL;
#ifdef __APPLE__
m_vIncompatibleGfxApps.clear();
default_ss_dir_path = "/Library/Application Support/BOINC Data";
if (gIsCatalina) {
char shmem_name[MAXPATHLEN];
snprintf(shmem_name, sizeof(shmem_name), "/tmp/boinc_ss_%s", gUserName);
retval = create_shmem_mmap(shmem_name, sizeof(int), (void**)&pid_from_shmem);
// make sure user/group RW permissions are set, but not other.
//
if (retval == 0) {
chmod(shmem_name, 0666);
retval = attach_shmem_mmap(shmem_name, (void**)&pid_from_shmem);
}
if (retval == 0) {
*pid_from_shmem = 0;
}
}
#else
default_ss_dir_path = (char*)m_strBOINCInstallDirectory.c_str();
#endif
strlcpy(full_path, default_ss_dir_path, sizeof(full_path));
strlcat(full_path, PATH_SEPARATOR, sizeof(full_path));
strlcat(full_path, THE_DEFAULT_SS_EXECUTABLE, sizeof(full_path));
if (boinc_file_exists(full_path)) {
m_bDefault_ss_exists = true;
} else {
SetError(TRUE, SCRAPPERR_CANTLAUNCHDEFAULTGFXAPP); // No GFX App is running: show moving BOINC logo
}
if (m_bDefault_ss_exists && m_bShow_default_ss_first) {
ss_phase = DEFAULT_SS_PHASE;
default_phase_start_time = dtime();
science_phase_start_time = 0;
switch_to_default_gfx = true;
} else {
ss_phase = SCIENCE_SS_PHASE;
default_phase_start_time = 0;
science_phase_start_time = dtime();
}
while (true) {
for (int i = 0; i < 4; i++) {
// ***
// *** Things that should be run frequently.
// *** 4 times per second.
// ***
// Are we supposed to exit the screensaver?
if (m_bQuitDataManagementProc) { // If main thread has requested we exit
BOINCTRACE(_T("CScreensaver::DataManagementProc - Thread told to stop\n"));
if (m_hGraphicsApplication || graphics_app_result_ptr) {
if (m_bDefault_gfx_running) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - Terminating default screensaver\n"));
terminate_default_screensaver(m_hGraphicsApplication);
} else {
BOINCTRACE(_T("CScreensaver::DataManagementProc - Terminating screensaver\n"));
terminate_screensaver(m_hGraphicsApplication, graphics_app_result_ptr);
}
graphics_app_result_ptr = NULL;
previous_result_ptr = NULL;
m_hGraphicsApplication = 0;
}
BOINCTRACE(_T("CScreensaver::DataManagementProc - Stopping...\n"));
m_bDataManagementProcStopped = true; // Tell main thread that we exited
return 0; // Exit the thread
}
boinc_sleep(0.25);
}
// ***
// *** Things that should be run less frequently.
// *** 1 time per second.
// ***
// Blank screen saver?
if ((m_dwBlankScreen) && (time(0) > m_dwBlankTime) && (m_dwBlankTime > 0)) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - Time to blank\n"));
SetError(FALSE, SCRAPPERR_SCREENSAVERBLANKED); // Blanked - hide moving BOINC logo
m_bQuitDataManagementProc = true;
continue; // Code above will exit the thread
}
BOINCTRACE(_T("CScreensaver::DataManagementProc - ErrorMode = '%d', ErrorCode = '%x'\n"), m_bErrorMode, m_hrError);
if (!m_bConnected) {
HandleRPCError();
}
if (m_bConnected) {
// Do we need to get the core client state?
if (m_bResetCoreState) {
// Try and get the current state of the CC
retval = rpc->get_state(state);
if (retval) {
// CC may not yet be running
HandleRPCError();
continue;
} else {
m_bResetCoreState = false;
}
}
// Update our task list
retval = rpc->get_screensaver_tasks(suspend_reason, results);
if (retval) {
// rpc call returned error
HandleRPCError();
m_bResetCoreState = true;
continue;
}
} else {
results.clear();
}
// Time to switch to default graphics phase?
if (m_bDefault_ss_exists && (ss_phase == SCIENCE_SS_PHASE) && (m_fGFXDefaultPeriod > 0)) {
if (science_phase_start_time && ((dtime() - science_phase_start_time) > m_fGFXSciencePeriod)) {
if (!m_bDefault_gfx_running) {
switch_to_default_gfx = true;
}
ss_phase = DEFAULT_SS_PHASE;
default_phase_start_time = dtime();
science_phase_start_time = 0;
if (m_bDefault_gfx_running && default_saver_start_time_in_science_phase) {
// Remember how long default graphics ran during science phase
default_saver_duration_in_science_phase += (dtime() - default_saver_start_time_in_science_phase);
}
default_saver_start_time_in_science_phase = 0;
}
}
// Time to switch to science graphics phase?
if ((ss_phase == DEFAULT_SS_PHASE) && m_bConnected && (m_fGFXSciencePeriod > 0)) {
if (default_phase_start_time &&
((dtime() - default_phase_start_time + default_saver_duration_in_science_phase)
> m_fGFXDefaultPeriod)) {
// BOINCTRACE(_T("CScreensaver::Ending Default phase: now=%f, default_phase_start_time=%f, default_saver_duration_in_science_phase=%f\n"),
// dtime(), default_phase_start_time, default_saver_duration_in_science_phase);
ss_phase = SCIENCE_SS_PHASE;
default_phase_start_time = 0;
default_saver_duration_in_science_phase = 0;
science_phase_start_time = dtime();
if (m_bDefault_gfx_running) {
default_saver_start_time_in_science_phase = science_phase_start_time;
}
switch_to_default_gfx = false;
}
}
// Core client suspended?
// We ignore SUSPEND_REASON_CPU_USAGE in SS coordinator, so it won't kill graphics apps for
// short-term CPU usage spikes (such as anti-virus.) Added 9 April 2010
if (suspend_reason && !(suspend_reason & (SUSPEND_REASON_CPU_THROTTLE | SUSPEND_REASON_CPU_USAGE))) {
if (!m_bDefault_gfx_running) {
SetError(TRUE, m_hrError); // No GFX App is running: show moving BOINC logo
if (m_bDefault_ss_exists) {
switch_to_default_gfx = true;
}
}
}
if (switch_to_default_gfx) {
if (m_bScience_gfx_running) {
if (m_hGraphicsApplication || previous_result_ptr) {
// use previous_result_ptr because graphics_app_result_ptr may no longer be valid
terminate_screensaver(m_hGraphicsApplication, previous_result_ptr);
if (m_hGraphicsApplication == 0) {
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
} else {
// HasProcessExited() test will clear m_hGraphicsApplication and graphics_app_result_ptr
}
previous_result_ptr = NULL;
}
} else {
if (!m_bDefault_gfx_running) {
switch_to_default_gfx = false;
retval = launch_default_screensaver(default_ss_dir_path, m_hGraphicsApplication);
if (retval) {
m_hGraphicsApplication = 0;
previous_result_ptr = NULL;
graphics_app_result_ptr = NULL;
m_bDefault_gfx_running = false;
SetError(TRUE, SCRAPPERR_CANTLAUNCHDEFAULTGFXAPP); // No GFX App is running: show moving BOINC logo
} else {
m_bDefault_gfx_running = true;
if (ss_phase == SCIENCE_SS_PHASE) {
default_saver_start_time_in_science_phase = dtime();
}
SetError(FALSE, SCRAPPERR_BOINCSCREENSAVERLOADING); // A GFX App is running: hide moving BOINC logo
}
}
}
}
if ((ss_phase == SCIENCE_SS_PHASE) && !switch_to_default_gfx) {
#if SIMULATE_NO_GRAPHICS /* FOR TESTING */
if (!m_bDefault_gfx_running) {
SetError(TRUE, m_hrError); // No GFX App is running: show moving BOINC logo
if (m_bDefault_ss_exists) {
switch_to_default_gfx = true;
}
}
#else /* NORMAL OPERATION */
if (m_bScience_gfx_running) {
// Is the current graphics app's associated task still running?
if ((m_hGraphicsApplication) || (graphics_app_result_ptr)) {
iResultCount = (int)results.results.size();
graphics_app_result_ptr = NULL;
// Find the current task in the new results vector (if it still exists)
for (iIndex = 0; iIndex < iResultCount; iIndex++) {
theResult = results.results.at(iIndex);
if (is_same_task(theResult, previous_result_ptr)) {
graphics_app_result_ptr = theResult;
previous_result = *theResult;
previous_result_ptr = &previous_result;
break;
}
}
// V6 graphics only: if worker application has stopped running, terminate_screensaver
if ((graphics_app_result_ptr == NULL) && (m_hGraphicsApplication != 0)) {
if (previous_result_ptr) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - %s finished\n"),
previous_result.graphics_exec_path
);
}
terminate_screensaver(m_hGraphicsApplication, previous_result_ptr);
previous_result_ptr = NULL;
if (m_hGraphicsApplication == 0) {
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
// Save previous_result and previous_result_ptr for get_random_graphics_app() call
} else {
// HasProcessExited() test will clear m_hGraphicsApplication and graphics_app_result_ptr
}
}
if (last_change_time && (m_fGFXChangePeriod > 0) && ((dtime() - last_change_time) > m_fGFXChangePeriod) ) {
if (count_active_graphic_apps(results, previous_result_ptr) > 0) {
if (previous_result_ptr) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - time to change: %s / %s\n"),
previous_result.name, previous_result.graphics_exec_path
);
}
terminate_screensaver(m_hGraphicsApplication, graphics_app_result_ptr);
if (m_hGraphicsApplication == 0) {
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
// Save previous_result and previous_result_ptr for get_random_graphics_app() call
} else {
// HasProcessExited() test will clear m_hGraphicsApplication and graphics_app_result_ptr
}
}
last_change_time = dtime();
}
}
} // End if (m_bScience_gfx_running)
// If no current graphics app, pick an active task at random
// and launch its graphics app
//
if ((m_bDefault_gfx_running || (m_hGraphicsApplication == 0)) && (graphics_app_result_ptr == NULL)) {
if (suspend_reason && !(suspend_reason & (SUSPEND_REASON_CPU_THROTTLE | SUSPEND_REASON_CPU_USAGE))) {
graphics_app_result_ptr = NULL;
} else {
graphics_app_result_ptr = get_random_graphics_app(results, previous_result_ptr);
previous_result_ptr = NULL;
}
if (graphics_app_result_ptr) {
if (m_bDefault_gfx_running) {
terminate_default_screensaver(m_hGraphicsApplication);
killing_default_gfx = true;
// Remember how long default graphics ran during science phase
if (default_saver_start_time_in_science_phase) {
default_saver_duration_in_science_phase += (dtime() - default_saver_start_time_in_science_phase);
//BOINCTRACE(_T("CScreensaver::During Science phase: now=%f, default_saver_start_time=%f, default_saver_duration=%f\n"),
// dtime(), default_saver_start_time_in_science_phase, default_saver_duration_in_science_phase);
}
default_saver_start_time_in_science_phase = 0;
// HasProcessExited() test will clear
// m_hGraphicsApplication and graphics_app_result_ptr
} else {
retval = launch_screensaver(graphics_app_result_ptr, m_hGraphicsApplication);
if (retval) {
m_hGraphicsApplication = 0;
previous_result_ptr = NULL;
graphics_app_result_ptr = NULL;
m_bScience_gfx_running = false;
} else {
// A GFX App is running: hide moving BOINC logo
//
SetError(FALSE, SCRAPPERR_BOINCSCREENSAVERLOADING);
last_change_time = dtime();
m_bScience_gfx_running = true;
// Make a local copy of current result, since original pointer
// may have been freed by the time we perform later tests
previous_result = *graphics_app_result_ptr;
previous_result_ptr = &previous_result;
if (previous_result_ptr) {
BOINCTRACE(_T("CScreensaver::DataManagementProc - launching %s\n"),
previous_result.graphics_exec_path
);
}
}
}
} else {
if (!m_bDefault_gfx_running) {
// We can't run a science graphics app, so run the default graphics if available
SetError(TRUE, m_hrError);
if (m_bDefault_ss_exists) {
switch_to_default_gfx = true;
}
}
} // End if no science graphics available
} // End if no current science graphics app is running
#endif // ! SIMULATE_NO_GRAPHICS
if (switch_to_default_gfx) {
switch_to_default_gfx = false;
if (!m_bDefault_gfx_running) {
retval = launch_default_screensaver(default_ss_dir_path, m_hGraphicsApplication);
if (retval) {
m_hGraphicsApplication = 0;
previous_result_ptr = NULL;
graphics_app_result_ptr = NULL;
m_bDefault_gfx_running = false;
SetError(TRUE, SCRAPPERR_CANTLAUNCHDEFAULTGFXAPP);
// No GFX App is running: show BOINC logo
} else {
m_bDefault_gfx_running = true;
default_saver_start_time_in_science_phase = dtime();
SetError(FALSE, SCRAPPERR_BOINCSCREENSAVERLOADING);
// Default GFX App is running: hide moving BOINC logo
}
}
}
} // End if ((ss_phase == SCIENCE_SS_PHASE) && !switch_to_default_gfx)
// Is the graphics app still running?
if (m_hGraphicsApplication) {
if (HasProcessExited(m_hGraphicsApplication, exit_status)) {
// Something has happened to the previously selected screensaver
// application. Start a different one.
BOINCTRACE(_T("CScreensaver::DataManagementProc - Graphics application isn't running, start a new one.\n"));
if (m_bDefault_gfx_running) {
// If we were able to connect to core client
// but gfx app can't, don't use it.
//
BOINCTRACE(_T("CScreensaver::DataManagementProc - Default graphics application exited with code %d.\n"), exit_status);
if (!killing_default_gfx) { // If this is an unexpected exit
if (exit_status == DEFAULT_GFX_CANT_CONNECT) {
SetError(TRUE, SCRAPPERR_DEFAULTGFXAPPCANTCONNECT);
// No GFX App is running: show moving BOINC logo
} else {
SetError(TRUE, SCRAPPERR_DEFAULTGFXAPPCRASHED);
// No GFX App is running: show moving BOINC logo
}
m_bDefault_ss_exists = false;
ss_phase = SCIENCE_SS_PHASE;
}
killing_default_gfx = false;
}
SetError(TRUE, SCRAPPERR_BOINCNOGRAPHICSAPPSEXECUTING);
// No GFX App is running: show moving BOINC logo
m_hGraphicsApplication = 0;
graphics_app_result_ptr = NULL;
m_bDefault_gfx_running = false;
m_bScience_gfx_running = false;
#ifdef __APPLE__
launchedGfxApp("", 0, -1);
#endif
continue;
}
}
} // end while(true)
}
#ifdef _WIN32
BOOL CScreensaver::HasProcessExited(HANDLE pid_handle, int &exitCode) {
unsigned long status = 1;
if (GetExitCodeProcess(pid_handle, &status)) {
if (status == STILL_ACTIVE) {
exitCode = 0;
return false;
}
}
exitCode = (int)status;
return true;
}
#else
bool CScreensaver::HasProcessExited(pid_t pid, int &exitCode) {
int status;
pid_t p;
if (gIsCatalina) {
// Only the process which launched an app can use waitpid() to test
// whether that app is still running. If we sent an RPC to the client
// asking the client to launch a graphics app via switcher, we must
// send another RPC to the client to call waitpid() for that app.
//
if (pid_from_shmem) {
//fprintf(stderr, "screensaver HasProcessExited got pid_from_shmem = %d\n", *pid_from_shmem);
if (*pid_from_shmem != 0) return false;
}
return true;
}
p = waitpid(pid, &status, WNOHANG);
exitCode = WEXITSTATUS(status);
if (p == pid) return true; // process has exited
if (p == -1) return true; // PID doesn't exist
exitCode = 0;
return false;
}
#endif
void CScreensaver::GetDefaultDisplayPeriods(struct ss_periods &periods) {
char* default_data_dir_path = NULL;
char buf[1024];
FILE* f;
MIOFILE mf;
periods.GFXDefaultPeriod = GFX_DEFAULT_PERIOD;
periods.GFXSciencePeriod = GFX_SCIENCE_PERIOD;
periods.GFXChangePeriod = GFX_CHANGE_PERIOD;
periods.Show_default_ss_first = false;
#ifdef __APPLE__
default_data_dir_path = "/Library/Application Support/BOINC Data";
#else
default_data_dir_path = (char*)m_strBOINCDataDirectory.c_str();
#endif
strlcpy(buf, default_data_dir_path, sizeof(buf));
strlcat(buf, PATH_SEPARATOR, sizeof(buf));
strlcat(buf, THE_SS_CONFIG_FILE, sizeof(buf));
f = boinc_fopen(buf, "r");
if (!f) return;
mf.init_file(f);
XML_PARSER xp(&mf);
while (!xp.get_tag()) {
if (xp.parse_bool("default_ss_first", periods.Show_default_ss_first)) continue;
if (xp.parse_double("default_gfx_duration", periods.GFXDefaultPeriod)) continue;
if (xp.parse_double("science_gfx_duration", periods.GFXSciencePeriod)) continue;
if (xp.parse_double("science_gfx_change_interval", periods.GFXChangePeriod)) continue;
}
fclose(f);
BOINCTRACE(
_T("CScreensaver::GetDefaultDisplayPeriods: m_bShow_default_ss_first=%d, m_fGFXDefaultPeriod=%f, m_fGFXSciencePeriod=%f, m_fGFXChangePeriod=%f\n"),
(int)periods.Show_default_ss_first,
periods.GFXDefaultPeriod,
periods.GFXSciencePeriod,
periods.GFXChangePeriod
);
}
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