/*
* syscall_stat
*
* Implementation of the stat system call, which obtains information about a
* particular file or directory. You should use this as a guideline for how to
* implement the other system calls in assignment 3.
*/
int syscall_stat(const char *path, struct stat *buf)
{
/*
* Ensure the supplied path name and buffer are valid pointers
*/
if (!valid_string(path))
return -EFAULT;
if (!valid_pointer(buf, sizeof(struct stat)))
return -EFAULT;
/*
* Get the directory_entry object for this path from the filesystem
*/
directory_entry *entry;
int r;
char abs[PATH_MAX];
relative_to_absolute(abs, current_process->cwd, path, PATH_MAX);
if (0 != (r = get_directory_entry(filesystem, abs, &entry)))
return r;
/*
* Set all fields of the stat buffer
*/
buf->st_mode = entry->mode;
buf->st_uid = 0;
buf->st_gid = 0;
buf->st_size = entry->size;
buf->st_mtime = entry->mtime;
return 0;
}
QWidget *float2_param_t::do_create_widgets()
{
QWidget *top = new QWidget();
QrLabel *label = new QrLabel( top);
input0_ = new QrDoubleSpinBox( top);
input1_ = new QrDoubleSpinBox( top);
QSize s = input0_->sizeHint();
label->move( 0, 0);
label->resize( ui::inspector_t::Instance().left_margin() - 5, s.height());
label->setAlignment( Qt::AlignRight | Qt::AlignVCenter);
label->setText( name().c_str());
int xpos = ui::inspector_t::Instance().left_margin();
float low = absolute_min();
float high = absolute_max();
Imath::V2f v = relative_to_absolute( get_value<Imath::V2f>( *this));
input0_->move( xpos, 0);
input0_->resize( s.width(), s.height());
input0_->setRange( low, high);
input0_->setStep( step());
input0_->setValue( v.x);
input0_->setEnabled( enabled());
connect( input0_, SIGNAL( calculatorValueChanged( double)), this, SLOT( value_changed( double)));
connect( input0_, SIGNAL( spinBoxPressed()), this, SLOT( spinbox_pressed()));
connect( input0_, SIGNAL( spinBoxMoved( double)), this, SLOT( spinbox_moved( double)));
connect( input0_, SIGNAL( spinBoxReleased()), this, SLOT( spinbox_released()));
xpos += ( s.width() + 5);
input1_->move( xpos, 0);
input1_->resize( s.width(), s.height());
input1_->setRange( low, high);
input1_->setStep( step());
input1_->setValue( v.y);
input1_->setEnabled( enabled());
connect( input1_, SIGNAL( calculatorValueChanged( double)), this, SLOT( value_changed( double)));
connect( input1_, SIGNAL( spinBoxPressed()), this, SLOT( spinbox_pressed()));
connect( input1_, SIGNAL( spinBoxMoved( double)), this, SLOT( spinbox_moved( double)));
connect( input1_, SIGNAL( spinBoxReleased()), this, SLOT( spinbox_released()));
xpos += ( s.width() + 2);
if( proportional())
{
create_proportional_button( top);
if( prop_button_)
prop_button_->move( xpos, 0);
}
top->setMinimumSize( ui::inspector_t::Instance().width(), s.height());
top->setMaximumSize( ui::inspector_t::Instance().width(), s.height());
top->setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed);
return top;
}
void float2_param_t::do_update_widgets()
{
if( input0_)
{
input0_->blockSignals( true);
input1_->blockSignals( true);
Imath::V2f pair = relative_to_absolute( get_value<Imath::V2f>( *this));
input0_->setValue( pair.x);
input1_->setValue( pair.y);
input0_->blockSignals( false);
input1_->blockSignals( false);
}
}
int syscall_chdir(const char *path)
{
if (!valid_string(path))
return -EFAULT;
char newcwd[PATH_MAX];
relative_to_absolute(newcwd, current_process->cwd, path, PATH_MAX);
int r;
directory_entry *entry;
if (0 != (r = get_directory_entry(filesystem, newcwd, &entry)))
return r;
if (TYPE_DIR != entry->type)
return -ENOTDIR;
memmove(current_process->cwd, newcwd, PATH_MAX);
return 0;
}
int syscall_open(const char *pathname, int flags)
{
if (!valid_string(pathname))
return -EFAULT;
int fd = -1;
for (fd = 0; fd < MAX_FDS; fd++) {
if (NULL == current_process->filedesc[fd])
break;
}
if (MAX_FDS == fd)
return -EMFILE;
char abspath[PATH_MAX];
relative_to_absolute(abspath, current_process->cwd, pathname, PATH_MAX);
directory_entry *entry;
int r;
if (0 != (r = get_directory_entry(filesystem, abspath, &entry)))
return r;
if ((flags == OPEN_DIRECTORY) && (entry->type != TYPE_DIR))
return -ENOTDIR;
else if ((flags != OPEN_DIRECTORY) && (entry->type == TYPE_DIR))
return -EISDIR;
filehandle *fh;
if (TYPE_DIR == entry->type)
fh = new_file(FH_DIR);
else
fh = new_file(FH_FILE);
fh->entry = entry;
fh->pos = 0;
fh->entryno = 0;
current_process->filedesc[fd] = fh;
return fd;
}
const char* PROJECT::project_dir_absolute() {
if (_project_dir_absolute[0] == 0) {
relative_to_absolute(project_dir(), _project_dir_absolute);
}
return _project_dir_absolute;
}
/// Start a task in a slot directory.
/// This includes setting up soft links,
/// passing preferences, and starting the process.
///
/// Current dir is top-level Synecdoche dir.
///
/// \post
/// - If any error occurs
/// - #task_state is #PROCESS_COULDNT_START
/// - CLIENT_STATE::report_result_error() is called
/// - else
/// - #task_state is #PROCESS_EXECUTING
///
/// \return 0 on success, nonzero otherwise.
int ACTIVE_TASK::start() {
char exec_name[256], exec_path[256];
unsigned int i;
FILE_REF fref;
int retval;
// F*** goto, need to define some variables here instead of where they are used!
std::ostringstream err_stream;
#ifdef _WIN32
std::string cmd_line;
std::string slotdirpath;
#else
// Needs to be defined here because those gotos would skip the
// initialization of 'cmdline' and 'argv' if it would be defined later.
std::ostringstream cmdline;
std::list<std::string> argv;
#endif
if ((!full_init_done) && (log_flags.task)) {
msg_printf(wup->project, MSG_INFO,
"Starting %s", result->name
);
}
if (log_flags.cpu_sched) {
msg_printf(wup->project, MSG_INFO,
"[cpu_sched] Starting %s%s", result->name, (full_init_done) ? " (resume)" : " (initial)"
);
}
// Always check if all required files are present. If not, trigger
// re-downloads and don't start the science application.
FILE_INFO_PSET missing_file_infos;
retval = gstate.input_files_available(result, true, &missing_file_infos);
if (retval) {
for (FILE_INFO_PSET::iterator it = missing_file_infos.begin(); it != missing_file_infos.end(); ++it) {
FILE_INFO* fip = *it;
if (fip) {
err_stream << "Input file " << fip->name
<< " missing or invalid: " << retval;
} else {
err_stream << "Input file missing or invalid";
// We can't trigger a new download if we don't have
// any file information. Just fail here as before.
goto error;
}
fip->status = FILE_NOT_PRESENT;
}
}
if (!missing_file_infos.empty()) {
// Some files are missing and are set for re-transfer.
// Update status and return without error.
result->set_state(RESULT_FILES_DOWNLOADING, "start");
set_task_state(PROCESS_UNINITIALIZED, "start");
next_scheduler_state = PROCESS_UNINITIALIZED;
return 0;
}
if (!full_init_done) {
checkpoint_cpu_time = 0;
checkpoint_wall_time = gstate.now;
}
current_cpu_time = checkpoint_cpu_time;
episode_start_cpu_time = checkpoint_cpu_time;
debt_interval_start_cpu_time = checkpoint_cpu_time;
graphics_request_queue.init(result->name); // reset message queues
process_control_queue.init(result->name);
if (!app_client_shm.shm) {
retval = get_shmem_seg_name();
if (retval) {
err_stream << "Can't get shared memory segment name: " << boincerror(retval);
goto error;
}
}
// this must go AFTER creating shmem name,
// since the shmem name is part of the file
//
retval = write_app_init_file();
if (retval) {
err_stream << "Can't write init file: " << retval;
goto error;
}
// set up applications files
//
strcpy(exec_name, "");
for (i=0; i<app_version->app_files.size(); i++) {
fref = app_version->app_files[i];
FILE_INFO* fip = fref.file_info;
std::string file_path = get_pathname(fip);
if (fref.main_program) {
if (is_image_file(fip->name)) {
err_stream << "Main program " << fip->name << " is an image file";
retval = ERR_NO_SIGNATURE;
goto error;
}
if (!fip->executable && !wup->project->anonymous_platform) {
err_stream << "Main program " << fip->name << " is not executable";
retval = ERR_NO_SIGNATURE;
goto error;
}
safe_strcpy(exec_name, fip->name.c_str());
safe_strcpy(exec_path, file_path.c_str());
}
// anonymous platform may use different files than
// when the result was started, so link files even if not first time
if ((!full_init_done) || (wup->project->anonymous_platform)) {
retval = setup_file(result->project, fip, fref, file_path, slot_dir, true);
if (retval) {
err_stream << "Can't link input file";
goto error;
}
}
}
if (!strlen(exec_name)) {
err_stream << "No main program specified";
retval = ERR_NOT_FOUND;
goto error;
}
// set up input, output files
if (!full_init_done) {
for (i=0; i<wup->input_files.size(); i++) {
fref = wup->input_files[i];
const FILE_INFO* fip = fref.file_info;
std::string file_path = get_pathname(fref.file_info);
retval = setup_file(result->project, fip, fref, file_path, slot_dir, true);
if (retval) {
err_stream << "Can't link input file";
goto error;
}
}
for (i=0; i<result->output_files.size(); i++) {
fref = result->output_files[i];
if (fref.copy_file) continue;
const FILE_INFO* fip = fref.file_info;
std::string file_path = get_pathname(fref.file_info);
retval = setup_file(result->project, fip, fref, file_path, slot_dir, false);
if (retval) {
err_stream << "Can't link output file";
goto error;
}
}
full_init_done = true;
}
link_user_files();
if (gstate.exit_before_start) {
exit(0);
}
#ifdef _WIN32
PROCESS_INFORMATION process_info;
STARTUPINFO startup_info;
LPVOID environment_block = NULL;
char error_msg[1024];
char error_msg2[1024];
memset(&process_info, 0, sizeof(process_info));
memset(&startup_info, 0, sizeof(startup_info));
startup_info.cb = sizeof(startup_info);
// suppress 2-sec rotating hourglass cursor on startup
//
startup_info.dwFlags = STARTF_FORCEOFFFEEDBACK;
app_client_shm.reset_msgs();
if (config.run_apps_manually) {
// fill in core client's PID so we won't think app has exited
pid = GetCurrentProcessId();
pid_handle = GetCurrentProcess();
set_task_state(PROCESS_EXECUTING, "start");
return 0;
}
// NOTE: in Windows, stderr is redirected in boinc_init_diagnostics();
cmd_line = exec_path + std::string(" ") + wup->command_line;
if (strlen(app_version->cmdline)) {
cmd_line += std::string(" ") + app_version->cmdline;
}
slotdirpath = relative_to_absolute(slot_dir);
bool success = false;
for (i=0; i<5; i++) {
if (sandbox_account_service_token != NULL) {
// Find CreateEnvironmentBlock/DestroyEnvironmentBlock pointers
tCEB pCEB = NULL;
tDEB pDEB = NULL;
HMODULE hUserEnvLib = NULL;
hUserEnvLib = LoadLibrary("userenv.dll");
if (hUserEnvLib) {
pCEB = (tCEB) GetProcAddress(hUserEnvLib, "CreateEnvironmentBlock");
pDEB = (tDEB) GetProcAddress(hUserEnvLib, "DestroyEnvironmentBlock");
}
if (!pCEB(&environment_block, sandbox_account_service_token, FALSE)) {
if (log_flags.task) {
windows_error_string(error_msg, sizeof(error_msg));
msg_printf(wup->project, MSG_INFO,
"Process environment block creation failed: %s", error_msg
);
}
}
if (CreateProcessAsUser(
sandbox_account_service_token,
exec_path,
(LPSTR)cmd_line.c_str(),
NULL,
NULL,
FALSE,
CREATE_NEW_PROCESS_GROUP|CREATE_NO_WINDOW|IDLE_PRIORITY_CLASS|CREATE_UNICODE_ENVIRONMENT,
environment_block,
slotdirpath.c_str(),
&startup_info,
&process_info
)) {
success = true;
break;
} else {
windows_error_string(error_msg, sizeof(error_msg));
msg_printf(wup->project, MSG_INTERNAL_ERROR,
"Process creation failed: %s", error_msg
);
}
if (!pDEB(environment_block)) {
if (log_flags.task) {
windows_error_string(error_msg, sizeof(error_msg2));
msg_printf(wup->project, MSG_INFO,
"Process environment block cleanup failed: %s",
error_msg2
);
}
}
if (hUserEnvLib) {
pCEB = NULL;
pDEB = NULL;
FreeLibrary(hUserEnvLib);
}
} else {
if (CreateProcess(
exec_path,
(LPSTR)cmd_line.c_str(),
NULL,
NULL,
FALSE,
CREATE_NEW_PROCESS_GROUP|CREATE_NO_WINDOW|IDLE_PRIORITY_CLASS,
NULL,
slotdirpath.c_str(),
&startup_info,
&process_info
)) {
success = true;
break;
} else {
windows_error_string(error_msg, sizeof(error_msg));
msg_printf(wup->project, MSG_INTERNAL_ERROR,
"Process creation failed: %s", error_msg
);
}
}
boinc_sleep(drand());
}
if (!success) {
err_stream << "CreateProcess() failed - " << error_msg;
retval = ERR_EXEC;
goto error;
}
pid = process_info.dwProcessId;
pid_handle = process_info.hProcess;
CloseHandle(process_info.hThread); // thread handle is not used
#else
// Unix/Linux/Mac case
// Set up core/app shared memory seg if needed
//
if (!app_client_shm.shm) {
if (app_version->api_major_version() >= 6) {
// Use mmap() shared memory
std::string buf = slot_dir + std::string("/") + std::string(MMAPPED_FILE_NAME);
if (g_use_sandbox) {
if (!boinc_file_exists(buf.c_str())) {
int fd = open(buf.c_str(), O_RDWR | O_CREAT, 0660);
if (fd >= 0) {
close (fd);
#ifdef SANDBOX
set_to_project_group(buf.c_str());
#endif
}
}
}
retval = create_shmem_mmap(
buf.c_str(), sizeof(SHARED_MEM), (void**)&app_client_shm.shm
);
} else {
// Use shmget() shared memory
retval = create_shmem(
shmem_seg_name, sizeof(SHARED_MEM), gstate.boinc_project_gid,
(void**)&app_client_shm.shm
);
if (retval) {
needs_shmem = true;
destroy_shmem(shmem_seg_name);
return retval;
}
}
needs_shmem = false;
}
app_client_shm.reset_msgs();
#if (defined (__APPLE__) && (defined(__i386__) || defined(__x86_64__)))
// PowerPC apps emulated on i386 Macs crash if running graphics
powerpc_emulated_on_i386 = ! is_native_i386_app(exec_path);
#endif
if (config.run_apps_manually) {
pid = getpid(); // use the client's PID
set_task_state(PROCESS_EXECUTING, "start");
return 0;
}
// Prepare command line for the science app:
cmdline << wup->command_line;
if (strlen(app_version->cmdline)) {
cmdline << ' ' << app_version->cmdline;
}
argv = parse_command_line(cmdline.str().c_str());
if (log_flags.task_debug) {
debug_print_argv(argv);
}
pid = fork();
if (pid == -1) {
err_stream << "fork() failed: " << strerror(errno);
retval = ERR_FORK;
goto error;
}
if (pid == 0) {
// from here on we're running in a new process.
// If an error happens,
// exit nonzero so that the core client knows there was a problem.
// don't pass stdout to the app
//
int fd = open("/dev/null", O_RDWR);
dup2(fd, STDOUT_FILENO);
close(fd);
// add to library path:
// - the project dir (../../projects/X)
// - the slot dir (.)
// - the Synecdoche dir (../..)
// We use relative paths in case higher-level dirs
// are not readable to the account under which app runs
//
std::string pdir = get_project_dir(wup->project);
std::ostringstream libpath;
const char* env_lib_path = getenv("LD_LIBRARY_PATH");
if (env_lib_path) {
libpath << env_lib_path << ':';
}
libpath << "../../" << pdir << ":.:../..";
setenv("LD_LIBRARY_PATH", libpath.str().c_str(), 1);
retval = chdir(slot_dir.c_str());
if (retval) {
perror("chdir");
fflush(NULL);
_exit(errno);
}
#if 0
// set stack size limit to the max.
// Some BOINC apps have reported problems with exceeding
// small stack limits (e.g. 8 MB)
// and it seems like the best thing to raise it as high as possible
//
struct rlimit rlim;
#define MIN_STACK_LIMIT 64000000
getrlimit(RLIMIT_STACK, &rlim);
if (rlim.rlim_cur != RLIM_INFINITY && rlim.rlim_cur <= MIN_STACK_LIMIT) {
if (rlim.rlim_max == RLIM_INFINITY || rlim.rlim_max > MIN_STACK_LIMIT) {
rlim.rlim_cur = MIN_STACK_LIMIT;
} else {
rlim.rlim_cur = rlim.rlim_max;
}
setrlimit(RLIMIT_STACK, &rlim);
}
#endif
// hook up stderr to a specially-named file
//
freopen(STDERR_FILE, "a", stderr);
// set idle process priority
#ifdef HAVE_SETPRIORITY
if (setpriority(PRIO_PROCESS, 0, PROCESS_IDLE_PRIORITY)) {
perror("setpriority");
}
#endif
std::string path = std::string("../../") + std::string(exec_path);
if (g_use_sandbox) {
std::ostringstream switcher_path;
switcher_path << "../../" << SWITCHER_DIR << '/' << SWITCHER_FILE_NAME;
argv.push_front(exec_name);
argv.push_front(path);
argv.push_front(SWITCHER_FILE_NAME);
// Files written by projects have user boinc_project and group boinc_project,
// so they must be world-readable so Synecdoche can read them.
umask(2);
retval = do_execv(switcher_path.str(), argv);
} else {
argv.push_front(exec_name);
retval = do_execv(path, argv);
}
msg_printf(wup->project, MSG_INTERNAL_ERROR,
"Process creation (%s) failed: %s, errno=%d\n", path.c_str(), boincerror(retval), errno
);
perror("execv");
fflush(NULL);
_exit(errno);
}
if (log_flags.task_debug) {
msg_printf(wup->project, MSG_INFO,
"[task_debug] ACTIVE_TASK::start(): forked process: pid %d\n", pid
);
}
#endif
set_task_state(PROCESS_EXECUTING, "start");
return 0;
// go here on error; "error_msg" contains error message, "retval" is nonzero
//
error:
// if something failed, it's possible that the executable was munged.
// Verify it to trigger another download.
//
gstate.input_files_available(result, true);
gstate.report_result_error(*result, "%s", err_stream.str().c_str());
set_task_state(PROCESS_COULDNT_START, "start");
return retval;
}
/// Write the app init file.
/// This is done before starting the app,
/// and when project prefs have changed during app execution.
///
/// \return 0 on success, #ERR_FOPEN if the file could not be opened.
///
/// \todo This function was modified to use ofstream instead of boinc_fopen().
/// This means the error checking and retry mechanisms of boinc_fopen() aren't
/// used now. We may need to restore them. --NA
int ACTIVE_TASK::write_app_init_file() {
APP_INIT_DATA aid;
memset(&aid, 0, sizeof(aid));
aid.major_version = BOINC_MAJOR_VERSION;
aid.minor_version = BOINC_MINOR_VERSION;
aid.release = BOINC_RELEASE;
aid.app_version = app_version->version_num;
safe_strcpy(aid.app_name, wup->app->name);
safe_strcpy(aid.symstore, wup->project->symstore);
safe_strcpy(aid.acct_mgr_url, gstate.acct_mgr_info.acct_mgr_url);
if (wup->project->project_specific_prefs.length()) {
aid.project_preferences = strdup(wup->project->project_specific_prefs.c_str());
}
aid.hostid = wup->project->hostid;
safe_strcpy(aid.user_name, wup->project->user_name);
safe_strcpy(aid.team_name, wup->project->team_name);
std::string project_path = relative_to_absolute(get_project_dir(wup->project));
strlcpy(aid.project_dir, project_path.c_str(), sizeof(aid.project_dir));
std::string buf = relative_to_absolute("");
strlcpy(aid.boinc_dir, buf.c_str(), sizeof(aid.boinc_dir));
strcpy(aid.authenticator, wup->project->authenticator);
aid.slot = slot;
strcpy(aid.wu_name, wup->name);
aid.user_total_credit = wup->project->user_total_credit;
aid.user_expavg_credit = wup->project->user_expavg_credit;
aid.host_total_credit = wup->project->host_total_credit;
aid.host_expavg_credit = wup->project->host_expavg_credit;
double rrs = gstate.runnable_resource_share();
if (rrs) {
aid.resource_share_fraction = wup->project->resource_share/rrs;
} else {
aid.resource_share_fraction = 1;
}
aid.rsc_fpops_est = wup->rsc_fpops_est;
aid.rsc_fpops_bound = wup->rsc_fpops_bound;
aid.rsc_memory_bound = wup->rsc_memory_bound;
aid.rsc_disk_bound = wup->rsc_disk_bound;
aid.computation_deadline = result->computation_deadline();
aid.checkpoint_period = gstate.ncpus * gstate.global_prefs.disk_interval;
aid.fraction_done_start = 0;
aid.fraction_done_end = 1;
#ifdef _WIN32
strcpy(aid.shmem_seg_name, shmem_seg_name);
#else
aid.shmem_seg_name = shmem_seg_name;
#endif
// wu_cpu_time is the CPU time at start of session,
// not the checkpoint CPU time
// At the start of an episode these are equal, but not in the middle!
//
aid.wu_cpu_time = episode_start_cpu_time;
std::string init_data_path = slot_dir + std::string("/") + std::string(INIT_DATA_FILE);
std::ofstream f(init_data_path.c_str(), std::ios::out);
if (!f.is_open()) {
msg_printf(wup->project, MSG_INTERNAL_ERROR,
"Failed to open init file %s",
init_data_path.c_str()
);
return ERR_FOPEN;
}
aid.host_info = gstate.host_info;
aid.global_prefs = gstate.global_prefs;
aid.proxy_info = gstate.proxy_info;
write_init_data_file(f, aid);
return 0;
}
