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boinc/clientscr/mac_saver_module.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 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/>.
//
// mac_saver_module.cpp
// BOINC_Saver_Module
//
#include <Carbon/Carbon.h>
#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <unistd.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/param.h> // for MAXPATHLEN
#include "gui_rpc_client.h"
#include "common_defs.h"
#include "util.h"
#include "Mac_Saver_Module.h"
#include "screensaver.h"
#include "diagnostics.h"
//#include <drivers/event_status_driver.h>
// Flags for testing & debugging
#define CREATE_LOG 0
#define USE_SPECIAL_LOG_FILE 1
#define TEXTLOGOFREQUENCY 60 /* Number of times per second to update moving logo with text */
#define NOTEXTLOGOFREQUENCY 4 /* Times per second to call animateOneFrame if no moving logo with text */
#define GFX_STARTING_MSG_DURATION 45 /* seconds to show ScreenSaverAppStartingMsg */
#define RPC_RETRY_INTERVAL 10 /* # of seconds between retries connecting to core client */
enum SaverState {
SaverState_Idle,
SaverState_LaunchingCoreClient,
SaverState_CoreClientRunning,
SaverState_RelaunchCoreClient,
SaverState_ConnectedToCoreClient,
SaverState_CantLaunchCoreClient,
SaverState_ControlPanelTestMode,
SaverState_UnrecoverableError
};
static CScreensaver* gspScreensaver = NULL;
extern int gGoToBlank; // True if we are to blank the screen
extern int gBlankingTime; // Delay in minutes before blanking the screen
extern CFStringRef gPathToBundleResources;
static SaverState saverState = SaverState_Idle;
// int gQuitCounter = 0;
static SInt32 gSystemVersion = 0;
const char * CantLaunchCCMsg = "Unable to launch BOINC application.";
const char * LaunchingCCMsg = "Launching BOINC application.";
const char * ConnectingCCMsg = "Connecting to BOINC application.";
const char * ConnectedCCMsg = "Communicating with BOINC application.";
const char * BOINCUnrecoverableErrorMsg = "Sorry, an unrecoverable error occurred";
const char * BOINCTestModeMsg = "BOINC screensaver test: success.";
const char * ScreenSaverAppStartingMsg = "Starting screensaver graphics.\nPlease wait ...";
const char * CantLaunchDefaultGFXAppMsg = "Can't launch default screensaver module. Please reinstall BOINC";
const char * DefaultGFXAppCantRPCMsg = "Default screensaver module couldn't connect to BOINC application";
const char * DefaultGFXAppCrashedMsg = "Default screensaver module had an unrecoverable error";
//const char * BOINCExitedSaverMode = "BOINC is no longer in screensaver mode.";
// If there are multiple displays, this may get called
// multiple times (once for each display), so we need to guard
// against any problems that may cause.
void initBOINCSaver() {
#ifdef _DEBUG
char buf1[256], buf2[256];
strcpy(buf1, getenv("HOME"));
strcat(buf1, "/Documents/ss_stdout");
strcpy(buf2, getenv("HOME"));
strcat(buf2, "/Documents/ss_stderr");
diagnostics_init(BOINC_DIAG_REDIRECTSTDOUTOVERWRITE
| BOINC_DIAG_REDIRECTSTDERROVERWRITE
| BOINC_DIAG_TRACETOSTDOUT, buf1, buf2
);
#endif
if (gspScreensaver == NULL) {
gspScreensaver = new CScreensaver();
}
}
int startBOINCSaver() {
if (gspScreensaver) {
return gspScreensaver->Create();
}
return TEXTLOGOFREQUENCY;
}
int getSSMessage(char **theMessage, int* coveredFreq) {
if (gspScreensaver) {
return gspScreensaver->getSSMessage(theMessage, coveredFreq);
} else {
*theMessage = "";
*coveredFreq = 0;
return NOTEXTLOGOFREQUENCY;
}
};
void windowIsCovered() {
if (gspScreensaver) {
gspScreensaver->windowIsCovered();
}
}
void drawPreview(CGContextRef myContext) {
if (gspScreensaver) {
gspScreensaver->drawPreview(myContext);
}
};
// If there are multiple displays, this may get called
// multiple times (once for each display), so we need to guard
// against any problems that may cause.
void closeBOINCSaver() {
if (gspScreensaver) {
gspScreensaver->ShutdownSaver();
delete gspScreensaver;
gspScreensaver = NULL;
}
}
double getGFXDefaultPeriod() {
if (gspScreensaver) {
return gspScreensaver->m_fGFXDefaultPeriod;
}
return 0;
}
double getGFXSciencePeriod() {
if (gspScreensaver) {
return gspScreensaver->m_fGFXSciencePeriod;
}
return 0;
}
double getGGFXChangePeriod() {
if (gspScreensaver) {
return gspScreensaver->m_fGFXChangePeriod;
}
return 0;
}
void setGFXDefaultPeriod(double value) {
if (gspScreensaver) {
gspScreensaver->m_fGFXDefaultPeriod = value;
}
}
void setGFXSciencePeriod(double value) {
if (gspScreensaver) {
gspScreensaver->m_fGFXSciencePeriod = value;
}
}
void setGGFXChangePeriod(double value) {
if (gspScreensaver) {
gspScreensaver->m_fGFXChangePeriod = value;
}
}
bool validateNumericString(CFStringRef s) {
CFIndex i;
CFRange range, result;
CFIndex len = CFStringGetLength(s);
CFCharacterSetRef theSet = CFCharacterSetGetPredefined(kCFCharacterSetDecimalDigit);
for (i=0; i<len; i++) {
range = CFRangeMake(i, 1);
if (!CFStringFindCharacterFromSet(s, theSet, range, kCFCompareAnchored, &result))
return false;
}
return true;
}
CScreensaver::CScreensaver() {
struct ss_periods periods;
OSStatus err;
m_dwBlankScreen = 0;
m_dwBlankTime = 0;
m_bErrorMode = false;
m_hrError = 0;
// Display first status update after 5 seconds
m_iGraphicsStartingMsgCounter = 0;
saverState = SaverState_Idle;
m_wasAlreadyRunning = false;
m_CoreClientPID = nil;
setSSMessageText(0);
m_CurrentBannerMessage = 0;
m_bQuitDataManagementProc = false;
m_bDataManagementProcStopped = false;
m_BrandText = "BOINC";
m_hDataManagementThread = NULL;
m_hGraphicsApplication = NULL;
m_bResetCoreState = TRUE;
rpc = 0;
m_bConnected = false;
err = Gestalt(gestaltSystemVersion, &gSystemVersion);
if (err != noErr) {
gSystemVersion = 0;
}
// Get project-defined default values for GFXDefaultPeriod, GFXSciencePeriod, GFXChangePeriod
GetDefaultDisplayPeriods(periods);
m_bShow_default_ss_first = periods.Show_default_ss_first;
m_fGFXDefaultPeriod = periods.GFXDefaultPeriod;
m_fGFXSciencePeriod = periods.GFXSciencePeriod;
m_fGFXChangePeriod = periods.GFXChangePeriod;
}
int CScreensaver::Create() {
ProcessSerialNumber psn;
ProcessInfoRec pInfo;
OSStatus err;
// Ugly workaround for a problem with the System Preferences app
// For an unknown reason, when this screensaver is run using the
// Test button in the System Prefs Screensaver control panel, the
// control panel calls our stopAnimation function as soon as the
// science application opens a GLUT window. This problem does not
// occur when the screensaver is run normally (from the screensaver
// engine.) So we just display a message and don't access the core
// client.
// With V6 graphics when using gfx_switcher, the graphics application
// fails to run and stderr shows the message:
// "The process has forked and you cannot use this CoreFoundation
// functionality safely. You MUST exec()"
GetCurrentProcess(&psn);
memset(&pInfo, 0, sizeof(pInfo));
pInfo.processInfoLength = sizeof( ProcessInfoRec );
pInfo.processName = NULL;
err = GetProcessInformation(&psn, &pInfo);
if ( (err == noErr) && (pInfo.processSignature == 'sprf') ) {
saverState = SaverState_ControlPanelTestMode;
}
// If there are multiple displays, initBOINCSaver may get called
// multiple times (once for each display), so we need to guard
// against launching multiple instances of the core client
if (saverState == SaverState_Idle) {
CFStringGetCString(gPathToBundleResources, m_gfx_Switcher_Path, sizeof(m_gfx_Switcher_Path), kCFStringEncodingMacRoman);
strlcat(m_gfx_Switcher_Path, "/gfx_switcher", sizeof(m_gfx_Switcher_Path));
err = initBOINCApp();
CGDisplayHideCursor(kCGNullDirectDisplay);
if (saverState == SaverState_LaunchingCoreClient)
{
SetError(FALSE, 0);
m_bQuitDataManagementProc = false;
m_bDataManagementProcStopped = false;
if (rpc == NULL) {
rpc = new RPC_CLIENT;
}
}
}
return TEXTLOGOFREQUENCY;
}
OSStatus CScreensaver::initBOINCApp() {
char boincPath[2048];
pid_t myPid;
int status;
OSStatus err;
static int retryCount = 0;
long brandId = 0;
saverState = SaverState_CantLaunchCoreClient;
brandId = GetBrandID();
switch(brandId) {
case 1:
m_BrandText = "GridRepublic";
break;
case 2:
m_BrandText = "Progress Thru Processors";
break;
default:
m_BrandText = "BOINC";
break;
}
m_CoreClientPID = FindProcessPID("boinc", 0);
if (m_CoreClientPID) {
m_wasAlreadyRunning = true;
saverState = SaverState_LaunchingCoreClient;
return noErr;
}
m_wasAlreadyRunning = false;
if (++retryCount > 3) // Limit to 3 relaunches to prevent thrashing
return -1;
#ifdef _DEBUG
err = -1;
#else
err = GetpathToBOINCManagerApp(boincPath, sizeof(boincPath));
#endif
if (err)
{ // If we couldn't find BOINCManager.app, try default path
strcpy(boincPath, "/Applications/");
if (brandId)
strcat(boincPath, m_BrandText);
else
strcat(boincPath, "BOINCManager");
strcat(boincPath, ".app");
}
strcat(boincPath, "/Contents/Resources/boinc");
if ( (myPid = fork()) < 0)
return -1;
else if (myPid == 0) // child
{
// We don't customize BOINC Data directory name for branding
#if 0 // Code for separate data in each user's private directory
char buf[256];
strcpy(buf, getenv("HOME"));
strcat(buf, "/Library/Application Support/BOINC Data");
status = chdir(buf);
#else // All users share the same data
status = chdir("/Library/Application Support/BOINC Data");
#endif
if (status) {
perror("chdir");
fflush(NULL);
_exit(status);
}
status = execl(boincPath, boincPath, "-redirectio", "-saver", (char *) 0);
fflush(NULL);
_exit(127); // execl error (execl should never return)
} else {
m_CoreClientPID = myPid; // make this available globally
saverState = SaverState_LaunchingCoreClient;
}
return noErr;
}
// Returns new desired Animation Frequency (per second) or 0 for no change
int CScreensaver::getSSMessage(char **theMessage, int* coveredFreq) {
int newFrequency = TEXTLOGOFREQUENCY;
*coveredFreq = 0;
pid_t myPid;
OSStatus err;
switch (saverState) {
case SaverState_RelaunchCoreClient:
err = initBOINCApp();
break;
case SaverState_LaunchingCoreClient:
if (m_wasAlreadyRunning)
setSSMessageText(ConnectingCCMsg);
else
setSSMessageText(LaunchingCCMsg);
myPid = FindProcessPID(NULL, m_CoreClientPID);
if (myPid) {
saverState = SaverState_CoreClientRunning;
if (!rpc->init(NULL)) { // Initialize communications with Core Client
m_bConnected = true;
}
// Set up a separate thread for communicating with Core Client
// and running screensaver graphics
CreateDataManagementThread();
// ToDo: Add a timeout after which we display error message
} else
// Take care of the possible race condition where the Core Client was in the
// process of shutting down just as ScreenSaver started, so initBOINCApp()
// found it already running but now it has shut down.
if (m_wasAlreadyRunning) { // If we launched it, then just wait for it to start
saverState = SaverState_RelaunchCoreClient;
}
break;
case SaverState_CoreClientRunning:
// RPC called in DataManagementProc()
setSSMessageText(ConnectingCCMsg);
if (! m_bResetCoreState) {
saverState = SaverState_ConnectedToCoreClient;
}
break;
case SaverState_ConnectedToCoreClient:
switch (m_hrError) {
case 0:
setSSMessageText(ConnectedCCMsg);
break; // No status response yet from DataManagementProc
case SCRAPPERR_SCREENSAVERBLANKED:
setSSMessageText(0); // No text message
break;
#if 0 // Not currently used
case SCRAPPERR_QUITSCREENSAVERREQUESTED:
// setSSMessageText(BOINCExitedSaverMode);
// Wait 1 second to allow ScreenSaver engine to close us down
if (++gQuitCounter > (m_MessageText[0] ? TEXTLOGOFREQUENCY : NOTEXTLOGOFREQUENCY)) {
closeBOINCSaver();
KillScreenSaver(); // Stop the ScreenSaver Engine
}
break;
#endif
case SCRAPPERR_CANTLAUNCHDEFAULTGFXAPP:
setSSMessageText(CantLaunchDefaultGFXAppMsg);
break;
case SCRAPPERR_DEFAULTGFXAPPCANTCONNECT:
setSSMessageText(DefaultGFXAppCantRPCMsg);
break;
case SCRAPPERR_DEFAULTGFXAPPCRASHED:
setSSMessageText(DefaultGFXAppCrashedMsg);
break;
default:
// m_bErrorMode is TRUE if we should display moving logo (no graphics app is running)
// m_bErrorMode is FALSE if a graphics app was launched and has not exit
if (! m_bErrorMode) {
// NOTE: My tests seem to confirm that the top window is always the first
// window returned by NSWindowList under OS 10.5 and the second window
// returned by NSWindowList under OS 10.3.9 and OS 10.4. However, Apple's
// documentation is unclear whether we can depend on this. So I have
// added some safety by doing two things:
// [1] Only use the NSWindowList test when we have started project or default
// graphics.
// [2] Assume that our window is covered 45 seconds after starting project
// graphics even if the NSWindowList test did not indicate that is so.
//
// The -animateOneFrame method in Mac_SaverModuleView.m does the NSWindowList test
// only if we return a non-zero value for coveredFreq.
//
// Tell the calling routine to set the frame rate to NOTEXTLOGOFREQUENCY if
// NSWindowList indicates that science app graphics window has covered our window.
*coveredFreq = NOTEXTLOGOFREQUENCY;
if (m_iGraphicsStartingMsgCounter > 0) {
// Show ScreenSaverAppStartingMsg for GFX_STARTING_MSG_DURATION seconds or until
// NSWindowList indicates that science app graphics window has covered our window
setSSMessageText(ScreenSaverAppStartingMsg);
m_iGraphicsStartingMsgCounter--;
} else {
// Don't waste CPU cycles when the science app is drawing over our window
setSSMessageText(0); // No text message
}
} // End if (! m_bErrorMode)
break; // End default case of switch (m_hrError)
} // end switch (m_hrError)
break; // End case SaverState_ConnectedToCoreClient of switch (saverState)
case SaverState_ControlPanelTestMode:
setSSMessageText(BOINCTestModeMsg);
break;
case SaverState_UnrecoverableError:
setSSMessageText(BOINCUnrecoverableErrorMsg);
break;
case SaverState_CantLaunchCoreClient:
setSSMessageText(CantLaunchCCMsg);
// Set up a separate thread for running screensaver graphics
// even if we can't communicate with core client
CreateDataManagementThread();
break;
case SaverState_Idle:
break; // Should never get here; fixes compiler warning
} // end switch (saverState)
if (m_MessageText[0]) {
newFrequency = TEXTLOGOFREQUENCY;
} else {
newFrequency = NOTEXTLOGOFREQUENCY;
}
*theMessage = m_MessageText;
return newFrequency;
}
void CScreensaver::windowIsCovered() {
m_iGraphicsStartingMsgCounter = 0;
}
void CScreensaver::drawPreview(CGContextRef myContext) {
// For possible future use
}
void CScreensaver::ShutdownSaver() {
DestroyDataManagementThread();
if (rpc) {
#if 0 // OS X calls closeBOINCSaver() when energy saver puts display
// to sleep, but we want to keep crunching. So don't kill it.
// Code in core client now quits on user activity if screen
// saver launched it (2/28/07).
// Also, under sandbox security, screensaver doesn't have access
// to rpc password in gui_rpc_auth.cfg file, so core client won't
// accept rpc->quit from screensaver.
if (m_CoreClientPID && (!m_wasAlreadyRunning)) {
rpc->quit(); // Kill core client if we launched it
}
#endif
delete rpc;
rpc = NULL;
}
setSSMessageText(0);
m_CoreClientPID = 0;
// gQuitCounter = 0;
m_wasAlreadyRunning = false;
m_bQuitDataManagementProc = false;
saverState = SaverState_Idle;
}
// This function forwards to DataManagementProc, which has access to the
// "this" pointer.
//
void * CScreensaver::DataManagementProcStub(void* param) {
return gspScreensaver->DataManagementProc();
}
void CScreensaver::HandleRPCError() {
static time_t last_RPC_retry = 0;
time_t now = time(0);
// Attempt to restart BOINC Client if needed, reinitialize the RPC client and state
rpc->close();
m_bConnected = false;
if (saverState == SaverState_CantLaunchCoreClient) {
if ((now - last_RPC_retry) < RPC_RETRY_INTERVAL) {
return;
}
last_RPC_retry = now;
} else {
// There is a possible race condition where the Core Client was in the
// process of shutting down just as ScreenSaver started, so initBOINCApp()
// found it already running but now it has shut down. This code takes
// care of that and other situations where the Core Client quits unexpectedy.
// Code in initBOINC_App() limits # launch retries to 3 to prevent thrashing.
if (FindProcessPID("boinc", 0) == 0) {
saverState = SaverState_RelaunchCoreClient;
m_bResetCoreState = true;
}
}
// If Core Client is hung, it might cause RPCs to hang, preventing us from
// shutting down the Data Management Thread, so don't reinitialize the RPC
// client if we have told the Data Management Thread to exit.
if (m_bQuitDataManagementProc) {
return;
}
// Otherwise just reinitialize the RPC client and state and keep trying
if (!rpc->init(NULL)) {
m_bConnected = true;
}
// Error message after timeout?
}
bool CScreensaver::CreateDataManagementThread() {
int retval;
// Calculate the estimated blank time by adding the starting
// time and and the user-specified time which is in minutes
m_dwBlankScreen = gGoToBlank;
if (gGoToBlank && (gBlankingTime > 0))
m_dwBlankTime = time(0) + (gBlankingTime * 60);
else
m_dwBlankTime = 0;
if (m_hDataManagementThread == NULL) {
retval = pthread_create(&m_hDataManagementThread, NULL, DataManagementProcStub, 0);
if (retval) {
saverState = SaverState_UnrecoverableError;
return false;
}
pthread_detach(m_hDataManagementThread);
}
return true;
}
bool CScreensaver::DestroyDataManagementThread() {
m_bQuitDataManagementProc = true; // Tell DataManagementProc thread to exit
if (!m_hDataManagementThread) return true;
for (int i=0; i<10; i++) { // Wait up to 1 second for DataManagementProc thread to exit
if (m_bDataManagementProcStopped) return true;
boinc_sleep(0.1);
}
if (rpc) {
rpc->close(); // In case DataManagementProc is hung waiting for RPC
}
m_hDataManagementThread = NULL; // Don't delay more if this routine is called again.
if (m_hGraphicsApplication) {
terminate_screensaver(m_hGraphicsApplication, NULL);
m_hGraphicsApplication = 0;
}
return true;
}
//
bool CScreensaver::SetError(bool bErrorMode, unsigned int hrError) {
// bErrorMode is TRUE if we should display moving logo (no graphics app is running)
// bErrorMode is FALSE if a graphics app was launched and has not exit
m_bErrorMode = bErrorMode;
m_hrError = hrError;
if (bErrorMode) {
// Reset our timer for showing ScreenSaverAppStartingMsg to
// GFX_STARTING_MSG_DURATION seconds
m_iGraphicsStartingMsgCounter = GFX_STARTING_MSG_DURATION * TEXTLOGOFREQUENCY;
}
return true;
}
void CScreensaver::setSSMessageText(const char * msg) {
if (msg == 0)
m_MessageText[0] = 0;
if (m_CurrentBannerMessage != msg)
updateSSMessageText((char *)msg);
}
void CScreensaver::updateSSMessageText(char *msg) {
char *p, *s;
m_CurrentBannerMessage = msg;
if (msg) {
s = msg;
m_MessageText[0] = '\0';
do {
p = strstr(s, "BOINC");
if (p == NULL) {
strcat(m_MessageText, s);
} else {
strncat(m_MessageText, s, p - s);
strcat(m_MessageText, m_BrandText);
s = p + 5; // s = p + strlen("BOINC");
}
} while (p);
}
}
int CScreensaver::GetBrandID()
{
char buf[1024];
long iBrandId;
OSErr err;
iBrandId = 0; // Default value
// The installer put a copy of Branding file in the BOINC Data Directory
FILE *f = fopen("/Library/Application Support/BOINC Data/Branding", "r");
if (f == NULL) {
// If we couldn't find our Branding file in the BOINC Data Directory,
// look in our application bundle
err = GetpathToBOINCManagerApp(buf, sizeof(buf));
if (err == noErr) {
strcat(buf, "/Contents/Resources/Branding");
f = fopen(buf, "r");
}
}
if (f) {
fscanf(f, "BrandId=%ld\n", &iBrandId);
fclose(f);
}
return iBrandId;
}
char * CScreensaver::PersistentFGets(char *buf, size_t buflen, FILE *f) {
char *p = buf;
size_t len = buflen;
size_t datalen = 0;
*buf = '\0';
while (datalen < (buflen - 1)) {
fgets(p, len, f);
if (feof(f)) break;
if (ferror(f) && (errno != EINTR)) break;
if (strchr(buf, '\n')) break;
datalen = strlen(buf);
p = buf + datalen;
len -= datalen;
}
return (buf[0] ? buf : NULL);
}
pid_t CScreensaver::FindProcessPID(char* name, pid_t thePID)
{
FILE *f;
char buf[1024];
size_t n = 0;
pid_t aPID;
if (name != NULL) // Search ny name
n = strlen(name);
f = popen("ps -a -x -c -o command,pid", "r");
if (f == NULL)
return 0;
while (PersistentFGets(buf, sizeof(buf), f))
{
if (name != NULL) { // Search ny name
if (strncmp(buf, name, n) == 0)
{
aPID = atol(buf+16);
pclose(f);
return aPID;
}
} else { // Search by PID
aPID = atol(buf+16);
if (aPID == thePID) {
pclose(f);
return aPID;
}
}
}
pclose(f);
return 0;
}
OSErr CScreensaver::GetpathToBOINCManagerApp(char* path, int maxLen)
{
CFStringRef bundleID = CFSTR("edu.berkeley.boinc");
OSType creator = 'BNC!';
FSRef theFSRef;
OSStatus status = noErr;
status = LSFindApplicationForInfo(creator, bundleID, NULL, &theFSRef, NULL);
if (status == noErr)
status = FSRefMakePath(&theFSRef, (unsigned char *)path, maxLen);
return status;
}
// Send a Quit AppleEvent to the process which called this module
// (i.e., tell the ScreenSaver engine to quit)
OSErr CScreensaver::KillScreenSaver() {
ProcessSerialNumber thisPSN;
pid_t thisPID;
OSErr err = noErr;
GetCurrentProcess(&thisPSN);
err = GetProcessPID(&thisPSN , &thisPID);
if (err == noErr)
err = kill(thisPID, SIGABRT); // SIGINT
return err;
}
void print_to_log_file(const char *format, ...) {
#if CREATE_LOG
va_list args;
char buf[256];
time_t t;
#if USE_SPECIAL_LOG_FILE
strcpy(buf, getenv("HOME"));
strcat(buf, "/Documents/test_log.txt");
FILE *f;
f = fopen(buf, "a");
if (!f) return;
// freopen(buf, "a", stdout);
// freopen(buf, "a", stderr);
#else
#define f stderr
#endif
time(&t);
strcpy(buf, asctime(localtime(&t)));
strip_cr(buf);
fputs(buf, f);
fputs(" ", f);
va_start(args, format);
vfprintf(f, format, args);
va_end(args);
fputs("\n", f);
#if USE_SPECIAL_LOG_FILE
fflush(f);
fclose(f);
#endif
#endif
}
#if CREATE_LOG
void strip_cr(char *buf)
{
char *theCR;
theCR = strrchr(buf, '\n');
if (theCR)
*theCR = '\0';
theCR = strrchr(buf, '\r');
if (theCR)
*theCR = '\0';
}
#endif // CREATE_LOG
void PrintBacktrace(void) {
// Dummy routine to satisfy linker
}
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