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// The contents of this file are subject to the Mozilla Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//
// Abstraction of a set of executing applications,
// connected to I/O files in various ways.
// Shouldn't depend on CLIENT_STATE.
#include "windows_cpp.h"
#include "error_numbers.h"
#ifdef _WIN32
#include <io.h>
#include <afxwin.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_SIGNAL_H
#include <sys/signal.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_SIGNAL_H
#include <signal.h>
#endif
#include <ctype.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include "client_state.h"
#include "client_types.h"
#include "filesys.h"
#include "file_names.h"
#include "log_flags.h"
#include "parse.h"
#include "util.h"
#include "app.h"
#include "boinc_api.h"
#include "graphics_api.h"
// Goes through an array of strings, and prints each string
//
static int print_argv(char** argv) {
int i;
for (i=0; argv[i]; i++) {
fprintf(stderr, "argv[%d]: %s\n", i, argv[i]);
}
return 0;
}
ACTIVE_TASK::ACTIVE_TASK() {
result = NULL;
wup = NULL;
app_version = NULL;
pid = 0;
slot = 0;
state = PROCESS_UNINITIALIZED;
exit_status = 0;
signal = 0;
strcpy(slot_dir, "");
}
int ACTIVE_TASK::init(RESULT* rp) {
result = rp;
wup = rp->wup;
app_version = wup->avp;
max_cpu_time = rp->wup->max_processing;
max_disk_usage = rp->wup->max_disk;
return 0;
}
// Start a task in a slot directory. This includes setting up soft links,
// passing preferences, and starting the process
//
// Current dir is top-level BOINC dir
//
int ACTIVE_TASK::start(bool first_time) {
char exec_name[256], file_path[256], link_path[256], temp[256], exec_path[256];
unsigned int i;
FILE_REF file_ref;
FILE_INFO* fip;
int retval;
char init_data_path[256], graphics_data_path[256], fd_init_path[256];
FILE *f;
APP_INIT_DATA aid;
GRAPHICS_INFO gi;
if (first_time) {
checkpoint_cpu_time = 0;
}
current_cpu_time = checkpoint_cpu_time;
starting_cpu_time = checkpoint_cpu_time;
fraction_done = 0;
gi.xsize = 800;
gi.ysize = 600;
gi.graphics_mode = MODE_WINDOW;
gi.refresh_period = 0.1;
memset(&aid, 0, sizeof(aid));
// TODO: fill in the app prefs, team name, etc.
strncpy( aid.user_name, wup->project->user_name, 256 );
if (wup->project->project_specific_prefs)
strncpy( aid.app_preferences, wup->project->project_specific_prefs, 4096 );
aid.total_cobblestones = wup->project->user_total_credit;
aid.recent_avg_cobblestones = wup->project->user_expavg_credit;
aid.checkpoint_period = DEFAULT_CHECKPOINT_PERIOD;
aid.fraction_done_update_period = DEFAULT_FRACTION_DONE_UPDATE_PERIOD;
aid.wu_cpu_time = checkpoint_cpu_time;
sprintf(init_data_path, "%s%s%s", slot_dir, PATH_SEPARATOR, INIT_DATA_FILE);
f = fopen(init_data_path, "w");
if (!f) {
if (log_flags.task_debug) {
printf("Failed to open core to app prefs file %s.\n", init_data_path);
}
return ERR_FOPEN;
}
write_init_data_file(f, aid);
fclose(f);
sprintf(graphics_data_path, "%s%s%s", slot_dir, PATH_SEPARATOR, GRAPHICS_DATA_FILE);
f = fopen(graphics_data_path, "w");
if (!f) {
if (log_flags.task_debug) {
printf("Failed to open core to app graphics prefs file %s.\n", graphics_data_path);
}
return ERR_FOPEN;
}
retval = write_graphics_file(f, &gi);
fclose(f);
sprintf(fd_init_path, "%s%s%s", slot_dir, PATH_SEPARATOR, FD_INIT_FILE);
f = fopen(fd_init_path, "w");
if (!f) {
if(log_flags.task_debug) {
printf("Failed to open init file %s.\n", fd_init_path);
}
return ERR_FOPEN;
}
// make soft links to the executable(s)
//
for (i=0; i<app_version->app_files.size(); i++) {
fip = app_version->app_files[i].file_info;
get_pathname(fip, file_path);
if (i == 0) {
strcpy(exec_name, fip->name);
strcpy(exec_path, file_path);
}
if (first_time) {
sprintf(link_path, "%s%s%s", slot_dir, PATH_SEPARATOR, fip->name);
sprintf(temp, "..%s..%s%s", PATH_SEPARATOR, PATH_SEPARATOR, file_path );
retval = boinc_link( temp, link_path);
if (log_flags.task_debug) {
printf("link %s to %s\n", file_path, link_path);
}
if (retval) {
perror("link");
fclose(f);
return retval;
}
}
}
// create symbolic links, and hook up descriptors, for input files
//
for (i=0; i<wup->input_files.size(); i++) {
file_ref = wup->input_files[i];
get_pathname(file_ref.file_info, file_path);
if (strlen(file_ref.open_name)) {
if (first_time) {
sprintf(link_path, "%s%s%s", slot_dir, PATH_SEPARATOR, file_ref.open_name);
sprintf(temp, "..%s..%s%s", PATH_SEPARATOR, PATH_SEPARATOR, file_path );
if (log_flags.task_debug) {
printf("link %s to %s\n", file_path, link_path);
}
retval = boinc_link(temp, link_path);
if (retval) {
perror("link");
fclose(f);
return retval;
}
}
} else {
sprintf(temp, "..%s..%s%s", PATH_SEPARATOR, PATH_SEPARATOR, file_path);
write_fd_init_file(f, temp, file_ref.fd, 1);
}
}
// hook up the output files using BOINC soft links
//
for (i=0; i<result->output_files.size(); i++) {
file_ref = result->output_files[i];
get_pathname(file_ref.file_info, file_path);
if (strlen(file_ref.open_name)) {
if (first_time) {
// the following is a relic of using hard links. not needed
//int fd = creat(file_path, 0660);
//close(fd);
sprintf(link_path, "%s%s%s", slot_dir, PATH_SEPARATOR, file_ref.open_name);
sprintf(temp, "..%s..%s%s", PATH_SEPARATOR, PATH_SEPARATOR, file_path );
if (log_flags.task_debug) {
printf("link %s to %s\n", file_path, link_path);
}
retval = boinc_link(temp, link_path);
if (retval) {
fclose(f);
perror("link");
return retval;
}
}
} else {
sprintf(temp, "..%s..%s%s", PATH_SEPARATOR, PATH_SEPARATOR, file_path);
write_fd_init_file(f, temp, file_ref.fd, 0);
}
}
fclose(f);
sprintf(temp, "%s%s%s", slot_dir, PATH_SEPARATOR, SUSPEND_QUIT_FILE);
file_delete(temp);
#ifdef _WIN32
PROCESS_INFORMATION process_info;
STARTUPINFO startup_info;
char slotdirpath[256];
char cmd_line[512];
int win_error;
memset( &process_info, 0, sizeof( process_info ) );
memset( &startup_info, 0, sizeof( startup_info ) );
startup_info.cb = sizeof(startup_info);
startup_info.lpReserved = NULL;
startup_info.lpDesktop = "";
// NOTE: in Windows, stderr is redirected within boinc_init();
sprintf( cmd_line, "%s %s", exec_path, wup->command_line );
// Need to condense argv into a single string
//if (log_flags.task_debug) print_argv(argv);
//
full_path(slot_dir, slotdirpath);
if (!CreateProcess(exec_path,
cmd_line,
NULL,
NULL,
FALSE,
CREATE_NEW_PROCESS_GROUP|CREATE_NO_WINDOW|IDLE_PRIORITY_CLASS,
NULL,
slotdirpath,
&startup_info,
&process_info
)) {
win_error = GetLastError();
char *errorargs[] = {app_version->app_name,"","","",""};
LPVOID lpMsgBuf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
NULL, win_error, 0, (LPTSTR)&lpMsgBuf, 0, errorargs);
// check for an error; if there is one, set error information for the currect result
if(win_error) {
gstate.report_project_error(*result, win_error, (LPTSTR)&lpMsgBuf);
LocalFree(lpMsgBuf);
return -1;
}
fprintf(stdout, "CreateProcess: %s\n", (LPCTSTR)lpMsgBuf);
LocalFree(lpMsgBuf);
}
pid = process_info.dwProcessId;
pid_handle = process_info.hProcess;
thread_handle = process_info.hThread;
#else
char* argv[100];
pid = fork();
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.
// chdir() into the slot directory
//
retval = chdir(slot_dir);
if (retval) {
perror("chdir");
exit(retval);
}
// hook up stderr to a specially-named file
//
freopen(STDERR_FILE, "a", stderr);
argv[0] = exec_name;
parse_command_line(wup->command_line, argv+1);
if (log_flags.task_debug) print_argv(argv);
boinc_resolve_filename(exec_name, temp, sizeof(temp));
retval = execv(temp, argv);
fprintf(stderr, "execv failed: %d\n", retval);
perror("execv");
exit(1);
}
if (log_flags.task_debug) printf("forked process: pid %d\n", pid);
#endif
state = PROCESS_RUNNING;
result->active_task_state = PROCESS_RUNNING;
return 0;
}
// Sends a request to the process of this active task to exit.
// If it doesn't exit within a set time (seconds), the process is terminated
//
int ACTIVE_TASK::request_exit() {
char susp_file[256];
get_slot_dir(slot, slot_dir);
sprintf(susp_file, "%s%s%s", slot_dir, PATH_SEPARATOR, SUSPEND_QUIT_FILE);
FILE *fp = fopen(susp_file, "w");
if (!fp) return ERR_FOPEN;
write_suspend_quit_file(fp, false, true);
fclose(fp);
return 0;
}
int ACTIVE_TASK::kill_task() {
#ifdef _WIN32
TerminateProcess(pid_handle, -1);
return 0;
#else
return kill(pid, SIGKILL);
#endif
}
// Inserts an active task into the ACTIVE_TASK_SET and starts it up
//
int ACTIVE_TASK_SET::insert(ACTIVE_TASK* atp) {
int retval;
get_slot_dir(atp->slot, atp->slot_dir);
clean_out_dir(atp->slot_dir);
retval = atp->start(true);
if (retval) return retval;
active_tasks.push_back(atp);
return 0;
}
// Checks if any child processes have exited and records their final CPU time
//
bool ACTIVE_TASK_SET::poll() {
ACTIVE_TASK* atp;
unsigned int j;
#ifdef _WIN32
unsigned long exit_code;
FILETIME creation_time, exit_time, kernel_time, user_time;
ULARGE_INTEGER tKernel, tUser;
LONGLONG totTime;
bool found = false;
for (int i=0; i<active_tasks.size(); i++) {
atp = active_tasks[i];
if (GetExitCodeProcess(atp->pid_handle, &exit_code)) {
// Get the elapsed CPU time
if (GetProcessTimes(atp->pid_handle, &creation_time, &exit_time, &kernel_time, &user_time)) {
tKernel.LowPart = kernel_time.dwLowDateTime;
tKernel.HighPart = kernel_time.dwHighDateTime;
tUser.LowPart = user_time.dwLowDateTime;
tUser.HighPart = user_time.dwHighDateTime;
// Runtimes in 100-nanosecond units
totTime = tKernel.QuadPart + tUser.QuadPart;
}
atp->result->final_cpu_time = atp->checkpoint_cpu_time;
if (exit_code != STILL_ACTIVE) {
found = true;
if (atp->state == PROCESS_ABORT_PENDING) {
atp->state = PROCESS_ABORTED;
atp->result->active_task_state = PROCESS_ABORTED;
gstate.report_project_error(*(atp->result), 0, "process was aborted\n");
} else {
atp->state = PROCESS_EXITED;
atp->exit_status = exit_code;
atp->result->exit_status = atp->exit_status;
atp->result->active_task_state = PROCESS_EXITED;
//if a nonzero error code, then report it
if(exit_code) {
gstate.report_project_error(*(atp->result),0,
"process exited with a non zero exit code\n");
}
}
CloseHandle(atp->pid_handle);
CloseHandle(atp->thread_handle);
atp->read_stderr_file();
clean_out_dir(atp->slot_dir);
}
}
}
if (found) return true;
#else
struct rusage rs;
int pid;
int stat;
pid = wait3(&stat, WNOHANG, &rs);
if (pid > 0) {
if (log_flags.task_debug) printf("process %d is done\n", pid);
atp = lookup_pid(pid);
if (!atp) {
fprintf(stderr, "ACTIVE_TASK_SET::poll(): pid %d not found\n", pid);
return true;
}
double x = rs.ru_utime.tv_sec + rs.ru_utime.tv_usec/1.e6;
atp->result->final_cpu_time = atp->starting_cpu_time + x;
if (atp->state == PROCESS_ABORT_PENDING) {
atp->state = PROCESS_ABORTED;
atp->result->active_task_state = PROCESS_ABORTED;
gstate.report_project_error(*(atp->result),0,"process was aborted\n");
} else {
if (WIFEXITED(stat)) {
atp->state = PROCESS_EXITED;
atp->exit_status = WEXITSTATUS(stat);
atp->result->exit_status = atp->exit_status;
atp->result->active_task_state = PROCESS_EXITED;
// If exit_status != 0, then we don't need to upload the
// files for the result of this app
if(atp->exit_status) {
gstate.report_project_error(*(atp->result),0,
"process exited with a nonzero exit code\n");
}
if (log_flags.task_debug) printf("process exited: status %d\n", atp->exit_status);
} else if (WIFSIGNALED(stat)) {
atp->state = PROCESS_WAS_SIGNALED;
atp->signal = WTERMSIG(stat);
atp->result->signal = atp->signal;
atp->result->active_task_state = PROCESS_WAS_SIGNALED;
gstate.report_project_error(*(atp->result),0,"process was signaled\n");
if (log_flags.task_debug) printf("process was signaled: %d\n", atp->signal);
} else {
atp->state = PROCESS_EXIT_UNKNOWN;
atp->result->state = PROCESS_EXIT_UNKNOWN;
}
}
atp->read_stderr_file();
clean_out_dir(atp->slot_dir);
return true;
}
#endif
// check for processes that have exceeded their maximum CPU time
// and abort them
//
for (j=0; j<active_tasks.size(); j++) {
atp = active_tasks[j];
if (atp->current_cpu_time > atp->max_cpu_time) {
fprintf(stderr, "Aborting task: exceeded CPU time limit %f\n", atp->max_cpu_time);
atp->abort();
return true;
}
}
return false;
}
int ACTIVE_TASK::abort() {
state = PROCESS_ABORT_PENDING;
result->active_task_state = PROCESS_ABORT_PENDING;
return kill_task();
}
// check for the stderr file, copy to result record
//
bool ACTIVE_TASK::read_stderr_file() {
char path[256];
int n;
sprintf(path, "%s%s%s", slot_dir, PATH_SEPARATOR, STDERR_FILE);
FILE* f = fopen(path, "r");
if (f) {
n = fread(result->stderr_out, 1, sizeof(result->stderr_out), f);
result->stderr_out[n] = 0;
fclose(f);
return true;
}
return false;
}
// Find the ACTIVE_TASK in the current set with the matching PID
//
ACTIVE_TASK* ACTIVE_TASK_SET::lookup_pid(int pid) {
unsigned int i;
ACTIVE_TASK* atp;
for (i=0; i<active_tasks.size(); i++) {
atp = active_tasks[i];
if (atp->pid == pid) return atp;
}
return NULL;
}
// suspend all currently running tasks
//
void ACTIVE_TASK_SET::suspend_all() {
unsigned int i;
ACTIVE_TASK* atp;
for (i=0; i<active_tasks.size(); i++) {
atp = active_tasks[i];
if(atp->suspend()) {
fprintf(stderr, "ACTIVE_TASK_SET::exit_tasks(): could not suspend active_task\n");
}
}
}
// resume all currently running tasks
//
void ACTIVE_TASK_SET::unsuspend_all() {
unsigned int i;
ACTIVE_TASK* atp;
for (i=0; i<active_tasks.size(); i++) {
atp = active_tasks[i];
if(atp->unsuspend()) {
fprintf(stderr, "ACTIVE_TASK_SET::exit_tasks(): could not unsuspend active_task\n");
}
}
}
// initiate exit of all currently running tasks
//
void ACTIVE_TASK_SET::exit_tasks() {
unsigned int i;
ACTIVE_TASK *atp;
for (i=0; i<active_tasks.size(); i++) {
atp = active_tasks[i];
if(atp->request_exit()) {
fprintf(stderr, "ACTIVE_TASK_SET::exit_tasks(): could not suspend active_task\n");
}
}
}
// suspend a task
//
int ACTIVE_TASK::suspend() {
#ifdef _WIN32
SuspendThread( thread_handle );
#else
kill(pid, SIGSTOP);
#endif
return 0;
}
// resume a suspended task
//
int ACTIVE_TASK::unsuspend() {
#ifdef _WIN32
ResumeThread( thread_handle );
#else
kill(pid, SIGCONT);
#endif
return 0;
}
// Remove an ACTIVE_TASK from the set.
// Do this only if you're sure that the process has exited.
//
int ACTIVE_TASK_SET::remove(ACTIVE_TASK* atp) {
vector<ACTIVE_TASK*>::iterator iter;
iter = active_tasks.begin();
while (iter != active_tasks.end()) {
if (*iter == atp) {
active_tasks.erase(iter);
return 0;
}
iter++;
}
fprintf(stderr, "ACTIVE_TASK_SET::remove(): not found\n");
return 1;
}
// Restart active tasks without wiping and reinitializing slot directories
//
int ACTIVE_TASK_SET::restart_tasks() {
vector<ACTIVE_TASK*>::iterator iter;
ACTIVE_TASK* atp;
int retval;
iter = active_tasks.begin();
while (iter != active_tasks.end()) {
atp = *iter;
atp->init(atp->result);
get_slot_dir(atp->slot, atp->slot_dir);
atp->result->is_active = true;
retval = atp->start(false);
if (log_flags.task) {
printf("restarting application for result %s\n", atp->result->name);
}
if (retval) {
fprintf(stderr, "ACTIVE_TASKS::restart_tasks(); restart failed: %d\n", retval);
atp->result->active_task_state = PROCESS_COULDNT_START;
gstate.report_project_error(*(atp->result),retval,"Couldn't restart the app for this result.\n");
active_tasks.erase(iter);
} else {
iter++;
}
}
return 0;
}
// See if the app has generated a new fraction-done file.
// If so read it and return true.
//
bool ACTIVE_TASK::check_app_status_files() {
FILE* f;
char path[256];
bool found = false;
int retval;
sprintf(path, "%s%s%s", slot_dir, PATH_SEPARATOR, FRACTION_DONE_FILE);
f = fopen(path, "r");
if (f) {
found = true;
parse_fraction_done_file(f, fraction_done, current_cpu_time, checkpoint_cpu_time);
fclose(f);
retval = file_delete(path);
if (retval) {
fprintf(stderr,
"ACTIVE_TASK.check_app_status_files: could not delete %s: %d\n",
path, retval
);
}
}
return found;
}
// Returns the estimated time to completion (in seconds) of this task,
// based on current reported CPU time and fraction done
//
double ACTIVE_TASK::est_time_to_completion() {
if (fraction_done <= 0 || fraction_done > 1) {
return -1;
}
return (current_cpu_time / fraction_done) - current_cpu_time;
}
// size of output files and files in slot dir
//
int ACTIVE_TASK::current_disk_usage(double& size) {
double x;
unsigned int i;
int retval;
FILE_INFO* fip;
char path[256];
retval = dir_size(slot_dir, size);
if (retval) return retval;
for (i=0; i<result->output_files.size(); i++) {
fip = result->output_files[i].file_info;
get_pathname(fip, path);
retval = file_size(path, x);
if (!retval) size += x;
}
return 0;
}
// Poll each of the currently running tasks and get their CPU time
//
bool ACTIVE_TASK_SET::poll_time() {
ACTIVE_TASK* atp;
unsigned int i;
bool updated = false;
for (i=0; i<active_tasks.size(); i++) {
atp = active_tasks[i];
updated |= atp->check_app_status_files();
}
return updated;
}
// Gets the next available free slot, or returns -1 if all slots are full
// TODO: don't use malloc here
//
int ACTIVE_TASK_SET::get_free_slot(int total_slots) {
unsigned int i;
char *slot_status;
if (active_tasks.size() >= (unsigned int)total_slots) {
return -1;
}
slot_status = (char *)calloc( sizeof(char), total_slots );
if (!slot_status) return -1;
for (i=0; i<active_tasks.size(); i++) {
if (active_tasks[i]->slot >= 0 && active_tasks[i]->slot < total_slots) {
slot_status[active_tasks[i]->slot] = 1;
}
}
for (i=0; i<(unsigned int)total_slots; i++) {
if (!slot_status[i]) {
free(slot_status);
return i;
}
}
free(slot_status);
return -1;
}
// Write XML data about this ACTIVE_TASK
//
int ACTIVE_TASK::write(FILE* fout) {
fprintf(fout,
"<active_task>\n"
" <project_master_url>%s</project_master_url>\n"
" <result_name>%s</result_name>\n"
" <app_version_num>%d</app_version_num>\n"
" <slot>%d</slot>\n"
" <checkpoint_cpu_time>%f</checkpoint_cpu_time>\n"
"</active_task>\n",
result->project->master_url,
result->name,
app_version->version_num,
slot,
checkpoint_cpu_time
);
return 0;
}
// Parse XML information about an active task
//
int ACTIVE_TASK::parse(FILE* fin, CLIENT_STATE* cs) {
char buf[256], result_name[256], project_master_url[256];
int app_version_num=0;
PROJECT* project;
strcpy(result_name, "");
strcpy(project_master_url, "");
while (fgets(buf, 256, fin)) {
if (match_tag(buf, "</active_task>")) {
project = cs->lookup_project(project_master_url);
if (!project) {
fprintf(stderr,
"ACTIVE_TASK::parse(): project not found: %s\n",
project_master_url
);
return -1;
}
result = cs->lookup_result(project, result_name);
if (!result) {
fprintf(stderr, "ACTIVE_TASK::parse(): result not found\n");
return -1;
}
wup = result->wup;
app_version = cs->lookup_app_version(
result->app, app_version_num
);
if (!app_version) {
fprintf(stderr, "ACTIVE_TASK::parse(): app_version not found\n");
return -1;
}
return 0;
}
else if (parse_str(buf, "<result_name>", result_name, sizeof(result_name))) continue;
else if (parse_str(buf, "<project_master_url>", project_master_url, sizeof(project_master_url))) continue;
else if (parse_int(buf, "<app_version_num>", app_version_num)) continue;
else if (parse_int(buf, "<slot>", slot)) continue;
else if (parse_double(buf, "<checkpoint_cpu_time>", checkpoint_cpu_time)) continue;
else fprintf(stderr, "ACTIVE_TASK::parse(): unrecognized %s\n", buf);
}
return -1;
}
// Write XML information about this active task set
//
int ACTIVE_TASK_SET::write(FILE* fout) {
unsigned int i;
fprintf(fout, "<active_task_set>\n");
for (i=0; i<active_tasks.size(); i++) {
active_tasks[i]->write(fout);
}
fprintf(fout, "</active_task_set>\n");
return 0;
}
// Parse XML information about an active task set
//
int ACTIVE_TASK_SET::parse(FILE* fin, CLIENT_STATE* cs) {
ACTIVE_TASK* atp;
char buf[256];
int retval;
while (fgets(buf, 256, fin)) {
if (match_tag(buf, "</active_task_set>")) return 0;
else if (match_tag(buf, "<active_task>")) {
atp = new ACTIVE_TASK;
retval = atp->parse(fin, cs);
if (!retval) active_tasks.push_back(atp);
else delete atp;
} else {
fprintf(stderr, "ACTIVE_TASK_SET::parse(): unrecognized %s\n", buf);
}
}
return 0;
}
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