void print_solution() {
FM_LOG_DEBUG("-- Solution Information --");
FM_LOG_MONITOR("solution id %d", oj_solution.sid);
FM_LOG_TRACE("problem id %d", oj_solution.pid);
FM_LOG_TRACE("language(%d) %s", oj_solution.lang, languages[oj_solution.lang]);
FM_LOG_TRACE("time limit %d ms", oj_solution.time_limit);
FM_LOG_TRACE("memory limit %d KB", oj_solution.memory_limit);
FM_LOG_DEBUG("work dir %s", oj_solution.work_dir);
FM_LOG_DEBUG("data dir %s", oj_solution.data_dir);
}
// Run spj
int oj_compare_output_spj(const char *file_in, // std input file
const char *file_out, // std output file
const char *file_user, // user output file
const char *spj_exec) // path of spj
{
FM_LOG_TRACE("start compare spj");
pid_t pid_spj = fork(); // create a child process for spj
if (pid_spj < 0) {
FM_LOG_FATAL("fork for spj failed: %s", strerror(errno));
exit(EXIT_COMPARE_SPJ);
} else if (pid_spj == 0) { // child process
log_add_info("spj");
// Set spj timeout
if (EXIT_SUCCESS == malarm(ITIMER_REAL, spj_time_limit)) {
FM_LOG_TRACE("load spj: %s", spj_exec);
execlp(spj_exec, spj_exec, file_in, file_out, file_user, NULL);
FM_LOG_FATAL("execute spj failed");
exit(EXIT_COMPARE_SPJ_FORK);
} else {
FM_LOG_FATAL("malarm for spj failed: %s", strerror(errno));
exit(EXIT_COMPARE_SPJ);
}
} else {
int status = 0;
if (waitpid(pid_spj, &status, 0) < 0) {
FM_LOG_FATAL("waitpid for spj failed: %s", strerror(errno));
exit(EXIT_COMPARE_SPJ);
}
if (WIFEXITED(status)) {
switch (WEXITSTATUS(status)) {
case SPJ_AC:
return OJ_AC;
case SPJ_PE:
return OJ_PE;
case SPJ_WA:
return OJ_WA;
default:
return OJ_VE;
}
} else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
// recv SIGNALRM
FM_LOG_WARNING("spj: time out");
} else {
// spj RE
FM_LOG_WARNING("unkown termination, status = %d", status);
}
}
return OJ_VE;
}
/*
* 输入输出重定向
*/
static
void io_redirect() {
FM_LOG_TRACE("Start to redirect the IO.");
stdin = freopen(PROBLEM::input_file.c_str(), "r", stdin);
stdout = freopen(PROBLEM::exec_output.c_str(), "w", stdout);
//stderr = freopen("/dev/null", "w", stderr);
if (stdin == NULL || stdout == NULL) {
FM_LOG_WARNING("It occur a error when freopen: stdin(%p) stdout(%p)", stdin, stdout);
exit(JUDGE_CONF::EXIT_PRE_JUDGE);
}
FM_LOG_TRACE("redirect io is OK.");
}
void ThreadWork() {
while (isRunning) {
oj_solution_t oj_solution = ProcessQueue.GetFrontAndPop();
pthread_t ptid = pthread_self();
FM_LOG_TRACE("Thread id: %d", ptid);
run(oj_solution);
}
}
void truncate_upload_file(char *file_path) {
off_t size = file_size(file_path);
if (size > MAX_UPLOAD_FILE_SIZE) {
FM_LOG_TRACE("truncate_upload_file: %s %d %d", file_path, size, MAX_UPLOAD_FILE_SIZE);
if (truncate(file_path, MAX_UPLOAD_FILE_SIZE) != 0) {
FM_LOG_WARNING("truncate upload file %s failed: %s", file_path, strerror(errno));
}
}
}
void SendWork() {
while (isRunning) {
auto item = SendQueue.GetFrontAndPop();
pthread_t ptid = pthread_self();
FM_LOG_TRACE("Send thread id: %d", ptid);
if (item.first == EXIT_OK) {
update_result(item.second);
} else {
update_system_error(item.first, item.second);
}
}
}
void log_close()
{
if (log_opened)
{
FM_LOG_TRACE("log_close");
fclose(log_fp);
free(log_filename);
log_fp = NULL;
log_filename = NULL;
log_opened = 0;
}
}
void io_redirect(const char *input_file, const char *stdout_file, const char *stderr_file) {
// io_redirect
stdin = freopen(input_file, "r", stdin);
stdout = freopen(stdout_file, "w", stdout);
stderr = freopen(stderr_file, "a+", stderr);
if (stdin == nullptr || stdout == nullptr || stderr == nullptr) {
FM_LOG_FATAL("error freopen: stdin(%p) stdout(%p), stderr(%p)", stdin, stdout, stderr);
exit(EXIT_PRE_JUDGE);
}
FM_LOG_TRACE("io redirect ok!");
}
int parse_arguments(char *str, oj_solution_t &oj_solution) {
int number = sscanf(str, "%s %d %s %s %s %s %s", oj_solution.sid, &oj_solution.cid,
oj_solution.pid, oj_solution.language,
oj_solution.time_limit, oj_solution.memory_limit, oj_solution.token);
FM_LOG_TRACE("sid=%s cid=%d pid=%s language=%s timeLimit=%s ms memoryLimit=%s KB %s",
oj_solution.sid, oj_solution.cid, oj_solution.pid, oj_solution.language,
oj_solution.time_limit, oj_solution.memory_limit, oj_solution.token);
if (number < 6) {
return -1;
}
return 0;
}
void set_security_option() {
if (oj_solution.lang != LANG_JAVA && oj_solution.lang != LANG_KOTLIN
#ifdef FAST_JUDGE
&& oj_solution.lang != LANG_PYTHON3 && oj_solution.lang != LANG_PYTHON27
#endif
) {
char cwd[PATH_SIZE];
char *tmp = getcwd(cwd, PATH_SIZE - 1);
if (tmp == nullptr) {
FM_LOG_FATAL("getcwd failed: %s", strerror(errno));
exit(EXIT_SET_SECURITY);
}
// chroot, current directory will be the root dir
if (EXIT_SUCCESS != chroot(cwd)) {
FM_LOG_FATAL("chroot(%s) failed: %s", cwd, strerror(errno));
exit(EXIT_SET_SECURITY);
}
FM_LOG_DEBUG("chroot(%s)", cwd);
}
FM_LOG_TRACE("set_security_option ok");
}
/*
* 输出判题结果到结果文件
*/
static
void output_result() {
FILE* result_file = fopen(PROBLEM::result_file.c_str(), "w");
switch (PROBLEM::result){
case 1:PROBLEM::status = "Compile Error";break;
case 2:PROBLEM::status = "Time Limit Exceeded";break;
case 3:PROBLEM::status = "Memory Limit Exceeded";break;
case 4:PROBLEM::status = "Output Limit Exceeded";break;
case 5:PROBLEM::status = "Runtime Error";break;
case 6:PROBLEM::status = "Wrong Answer";break;
case 7:PROBLEM::status = "Accepted";break;
case 8:PROBLEM::status = "Presentation Error";break;
default:PROBLEM::status = "System Error";break;
}
fprintf(result_file, "%s\n", PROBLEM::status.c_str());
fprintf(result_file, "%d\n", PROBLEM::time_usage);
fprintf(result_file, "%d\n", PROBLEM::memory_usage);
fprintf(result_file, "%s\n", PROBLEM::extra_message.c_str());
FM_LOG_TRACE("The final result is %s %d %d %s",
PROBLEM::status.c_str(), PROBLEM::time_usage,
PROBLEM::memory_usage, PROBLEM::extra_message.c_str());
}
void set_limit(off_t fsize) {
rlimit lim{};
// Set CPU time limit round up, raise SIGXCPU
lim.rlim_max = (oj_solution.time_limit + 999) / 1000 + 1;
lim.rlim_cur = lim.rlim_max;
if (setrlimit(RLIMIT_CPU, &lim) < 0) {
FM_LOG_FATAL("setrlimit RLIMIT_CPU failed: %s", strerror(errno));
exit(EXIT_SET_LIMIT);
}
if (oj_solution.lang <= LANG_PASCAL) {
// Memory control, raise SIGSEGV
lim.rlim_cur = lim.rlim_max = (STD_MB << 10) + oj_solution.memory_limit * STD_KB;
if (setrlimit(RLIMIT_AS, &lim) < 0) {
FM_LOG_FATAL("setrlimit RLIMIT_AS failed: %s", strerror(errno));
exit(EXIT_SET_LIMIT);
}
}
// Stack space, raise SIGSEGV
lim.rlim_cur = lim.rlim_max = stack_size_limit * STD_KB;
if (setrlimit(RLIMIT_STACK, &lim) < 0) {
FM_LOG_FATAL("setrlimit RLIMIT_STACK failed: %s", strerror(errno));
exit(EXIT_SET_LIMIT);
}
// Output file size limit, raise SIGXFSZ
lim.rlim_cur = lim.rlim_max = (rlim_t) (4 * MAX_LOG_FILE_SIZE);
if (setrlimit(RLIMIT_FSIZE, &lim) < 0) {
FM_LOG_FATAL("setrlimit RLIMIT_FSIZE failed: %s", strerror(errno));
exit(EXIT_SET_LIMIT);
}
FM_LOG_DEBUG("File size limit: %d", lim.rlim_max);
FM_LOG_TRACE("set execute limit ok");
}
bool judge(const char *input_file,
const char *output_file_std,
const char *stdout_file_executive,
const char *stderr_file_executive) {
rusage rused{};
pid_t executor = fork(); // create a child process for executor
if (executor < 0) {
FM_LOG_FATAL("fork executor failed: %s", strerror(errno));
exit(EXIT_PRE_JUDGE);
} else if (executor == 0) { // child process
log_add_info("executor");
off_t fsize = file_size(output_file_std);
// io redirect, must before set_security_option()
io_redirect(input_file, stdout_file_executive, stderr_file_executive);
// chroot & setuid
set_security_option();
// set memory, time and file size limit etc.
set_limit(fsize); // must after set_security_option()
FM_LOG_DEBUG("time limit: %d, time limit addtion: %d",
oj_solution.time_limit, time_limit_addtion);
uint64_t real_time_limit = oj_solution.time_limit + time_limit_addtion; // time fix
// set real time alarm
if (EXIT_SUCCESS != malarm(ITIMER_REAL, real_time_limit)) {
FM_LOG_FATAL("malarm for executor failed: %s", strerror(errno));
exit(EXIT_PRE_JUDGE);
}
FM_LOG_TRACE("begin execute");
if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) < 0) {
FM_LOG_FATAL("Trace executor failed: %s", strerror(errno));
exit(EXIT_PRE_JUDGE_PTRACE);
}
// load program
if (oj_solution.lang == LANG_JAVA) {
print_executor(EXEC_J);
execvp(EXEC_J[0], (char *const *) EXEC_J);
} else if (oj_solution.lang == LANG_KOTLIN) {
print_executor(EXEC_KT);
execvp(EXEC_KT[0], (char *const *) EXEC_KT);
} else if (oj_solution.lang == LANG_PYTHON27) {
print_executor(EXEC_PY27);
#ifdef FAST_JUDGE
execvp(EXEC_PY27[0], (char * const *) EXEC_PY27);
#else
execv(EXEC_PY27[0], (char *const *) EXEC_PY27);
#endif
} else if (oj_solution.lang == LANG_PYTHON3) {
print_executor(EXEC_PY3);
#ifdef FAST_JUDGE
execvp(EXEC_PY3[0], (char * const *) EXEC_PY3);
#else
execv(EXEC_PY3[0], (char *const *) EXEC_PY3);
#endif
} else {
execl("./Main", "./Main", NULL);
}
// exec error
FM_LOG_FATAL("exec error");
exit(EXIT_PRE_JUDGE_EXECLP);
} else {
// Judger
int status = 0;
user_regs_struct regs{};
stderr = freopen("error.txt", "a+", stderr);
init_syscalls(oj_solution.lang);
while (true) {
if (wait4(executor, &status, 0, &rused) < 0) {
FM_LOG_FATAL("wait4 executor failed: %s", strerror(errno));
kill(executor, SIGKILL);
exit(EXIT_JUDGE);
}
if (WIFEXITED(status)) {
if ((oj_solution.lang != LANG_JAVA && oj_solution.lang != LANG_KOTLIN) ||
WEXITSTATUS(status) == EXIT_SUCCESS) {
// AC PE WA
FM_LOG_TRACE("normal quit");
int result;
if (oj_solution.spj) {
// use SPJ
result = oj_compare_output_spj(input_file, output_file_std, stdout_file_executive,
oj_solution.spj_exe_file);
} else {
// compare file
result = oj_compare_output(output_file_std, stdout_file_executive);
}
// WA
if (result == OJ_WA) {
oj_solution.result = OJ_WA;
} else if (oj_solution.result != OJ_PE) { // previous case is AC
oj_solution.result = result; // AC or PE
} else /* (oj_solution.result == OJ_PE) */ { // previous case is PE
oj_solution.result = OJ_PE;
}
FM_LOG_NOTICE("case result: %d, problem result: %d", result, oj_solution.result);
} else {
// not return 0
oj_solution.result = OJ_RE;
FM_LOG_NOTICE("abnormal quit, exit_code: %d", WEXITSTATUS(status));
}
break;
}
// RE/TLE/OLE
if (WIFSIGNALED(status) || (WIFSTOPPED(status) && WSTOPSIG(status) != SIGTRAP)) {
int signo = 0;
if (WIFSIGNALED(status)) {
signo = WTERMSIG(status);
FM_LOG_NOTICE("child process killed by signal %d, %s", signo, strsignal(signo));
} else {
signo = WSTOPSIG(status);
FM_LOG_NOTICE("child process stopped by signal %d, %s", signo, strsignal(signo));
}
switch (signo) {
// Ignore
case SIGCHLD:
oj_solution.result = OJ_AC;
break;
// TLE
case SIGALRM: // alarm() and setitimer(ITIMER_REAL)
case SIGVTALRM: // setitimer(ITIMER_VIRTUAL)
case SIGXCPU: // exceeds soft processor limit
oj_solution.result = OJ_TLE;
FM_LOG_TRACE("Time Limit Exceeded: %s", strsignal(signo));
break;
// OLE
case SIGXFSZ: // exceeds file size limit
oj_solution.result = OJ_OLE;
FM_LOG_TRACE("Output Limit Exceeded");
break;
// RE
case SIGSEGV: // segmentation violation
case SIGFPE: // any arithmetic exception
case SIGBUS: // the process incurs a hardware fault
case SIGABRT: // abort() function
case SIGKILL: // exceeds hard processor limit
default:
oj_solution.result = OJ_RE;
FILE *fp = fopen(stderr_file_executive, "a+");
if (fp == nullptr) {
fprintf(stderr, "%s\n", strsignal(signo));
FM_LOG_WARNING("Runtime Error: %s", strsignal(signo));
} else {
fprintf(fp, "%s\n", strsignal(signo));
fclose(fp);
}
break;
} // end of swtich
kill(executor, SIGKILL);
break;
} // end of "if (WIFSIGNALED(status) ...)"
oj_solution.memory_usage = std::max(oj_solution.memory_usage, (unsigned long) rused.ru_maxrss);
// TODO(power): check why memory exceed too much
if (oj_solution.memory_usage > oj_solution.memory_limit) {
oj_solution.result = OJ_MLE;
kill(executor, SIGKILL);
break;
}
// check syscall
if (ptrace(PTRACE_GETREGS, executor, NULL, ®s) < 0) {
FM_LOG_FATAL("ptrace(PTRACE_GETREGS) failed: %s", strerror(errno));
kill(executor, SIGKILL);
exit(EXIT_JUDGE);
}
int syscall_id = 0;
#ifdef __i386__
syscall_id = (int)regs.orig_eax;
#else
syscall_id = (int) regs.orig_rax;
#endif
if (syscall_id > 0 && !is_valid_syscall(syscall_id)) {
oj_solution.result = OJ_RF;
FM_LOG_FATAL("restricted function, syscall_id: %d", syscall_id);
kill(executor, SIGKILL);
break;
}
if (ptrace(PTRACE_SYSCALL, executor, NULL, NULL) < 0) {
FM_LOG_FATAL("ptrace(PTRACE_SYSCALL) failed: %s", strerror(errno));
kill(executor, SIGKILL);
exit(EXIT_JUDGE);
}
} // end of while
} // end of fork for judge process
oj_solution.memory_usage = std::max(oj_solution.memory_usage, (unsigned long) rused.ru_maxrss);
if (oj_solution.memory_usage > oj_solution.memory_limit) {
oj_solution.result = OJ_MLE;
FM_LOG_NOTICE("memory limit exceeded: %d (fault: %d * %d)",
oj_solution.memory_usage, rused.ru_minflt, page_size);
}
oj_solution.time_usage = std::max(oj_solution.time_usage,
(unsigned long) rused.ru_utime.tv_sec * 1000 + rused.ru_utime.tv_usec / 1000);
if (oj_solution.time_usage > oj_solution.time_limit) {
oj_solution.result = OJ_TLE;
FM_LOG_TRACE("Time Limit Exceeded");
}
if (oj_solution.result != OJ_AC) {
if (oj_solution.judge_type == ACM) {
FM_LOG_NOTICE("not AC/PE, no need to continue");
}
if (oj_solution.result == OJ_TLE) {
oj_solution.time_usage = oj_solution.time_limit;
} else if (oj_solution.result == OJ_WA) {
if (oj_solution.lang == LANG_JAVA) { // TODO: kotlin
fix_java_result(stdout_file_executive, stderr_file_executive);
} else if ((oj_solution.lang == LANG_PYTHON27 || oj_solution.lang == LANG_PYTHON3) &&
file_size(stderr_file_executive)) {
oj_solution.result = OJ_RE;
FM_LOG_TRACE("Runtime Error");
}
}
return false;
}
return true;
}
void run_solution() {
FM_LOG_DEBUG("run_solution");
#ifndef FAST_JUDGE
if (oj_solution.lang == LANG_PYTHON27) {
copy_python_runtime_python2(oj_solution.work_dir);
FM_LOG_DEBUG("copy_python_runtime");
} else if (oj_solution.lang == LANG_PYTHON3) {
copy_python_runtime_python3(oj_solution.work_dir);
FM_LOG_DEBUG("copy_python_runtime");
}
#endif
check_spj();
struct dirent **namelist;
int num_of_test;
num_of_test = scandir(oj_solution.data_dir, &namelist, data_filter, alphasort);
if (num_of_test < 0) {
FM_LOG_FATAL("scan data directory failed: %s", strerror(errno));
exit(EXIT_PRE_JUDGE_DAA);
}
int first_failed_test = 0;
char input_file[PATH_SIZE];
char output_file_std[PATH_SIZE];
char stdout_file_executive[PATH_SIZE];
char stderr_file_executive[PATH_SIZE];
snprintf(stderr_file_executive, PATH_SIZE, "%s/stderr_executive.txt", oj_solution.work_dir);
FM_LOG_DEBUG("start run solution (%d cases)", num_of_test);
for (int i = 0; i < num_of_test; ++i) {
update_solution_status(oj_solution.cid, oj_solution.sid, OJ_RUN, i + 1);
prepare_files(namelist[i]->d_name, input_file, output_file_std, stdout_file_executive);
FM_LOG_TRACE("run case: %d", i + 1);
bool result = judge(input_file, output_file_std, stdout_file_executive, stderr_file_executive);
if (oj_solution.result != OJ_AC && !first_failed_test) {
first_failed_test = i + 1;
}
if (!result && oj_solution.judge_type == ACM) {
break;
}
}
for (int i = 0; i < num_of_test; ++i) {
free(namelist[i]);
}
free(namelist);
#ifndef FAST_JUDGE
if (oj_solution.lang == LANG_PYTHON27 || oj_solution.lang == LANG_PYTHON3) {
clean_workdir(oj_solution.work_dir);
}
#endif
output_acm_result(oj_solution.result, oj_solution.time_usage, oj_solution.memory_usage, first_failed_test);
}
/*
* #error "This make CE"
* #warning "Just warning message"
* #include </dev/core>
* #include </dev/zero>
* #include </dev/random>
* #include </etc/passwd>
* #include <../../../etc/passwd>
* egrep '^\s*#include\s*[<"][./].*[>"]' Main.cc
*/
void compile() {
update_solution_status(oj_solution.cid, oj_solution.sid, OJ_COM, 0);
char stdout_compiler[PATH_SIZE];
char stderr_compiler[PATH_SIZE];
snprintf(stdout_compiler, PATH_SIZE, "%s/stdout_compiler.txt", oj_solution.work_dir);
snprintf(stderr_compiler, PATH_SIZE, "%s/stderr_compiler.txt", oj_solution.work_dir);
pid_t compiler = fork(); // create a child process for compiler
if (compiler < 0) {
FM_LOG_FATAL("fork compiler failed: %s", strerror(errno));
exit(EXIT_FORK_COMPILER);
} else if (compiler == 0) {
// child process: run compiler
log_add_info("compiler");
set_compile_limit();
stdout = freopen(stdout_compiler, "w", stdout);
stderr = freopen(stderr_compiler, "w", stderr);
if (stdout == nullptr || stderr == nullptr) {
FM_LOG_FATAL("error freopen: stdout(%p), stderr(%p)", stdout, stderr);
exit(EXIT_COMPILE_IO);
}
print_user_group();
print_word_dir();
switch (oj_solution.lang) {
case LANG_C99:
print_compiler(CP_C99);
execvp(CP_C99[0], (char *const *) CP_C99);
break;
case LANG_C11:
print_compiler(CP_C11);
execvp(CP_C11[0], (char *const *) CP_C11);
break;
case LANG_CPP98:
print_compiler(CP_CC98);
execvp(CP_CC98[0], (char *const *) CP_CC98);
break;
case LANG_CPP11:
print_compiler(CP_CC11);
execvp(CP_CC11[0], (char *const *) CP_CC11);
break;
case LANG_CPP14:
print_compiler(CP_CC14);
execvp(CP_CC14[0], (char *const *) CP_CC14);
break;
case LANG_CPP17:
print_compiler(CP_CC98);
execvp(CP_CC98[0], (char *const *) CP_CC17);
break;
case LANG_PASCAL:
print_compiler(CP_PAS);
execvp(CP_PAS[0], (char *const *) CP_PAS);
break;
case LANG_JAVA:
print_compiler(CP_J);
execvp(CP_J[0], (char *const *) CP_J);
break;
case LANG_PYTHON27:
print_compiler(CP_PY27);
execvp(CP_PY27[0], (char *const *) CP_PY27);
break;
case LANG_PYTHON3:
print_compiler(CP_PY3);
execvp(CP_PY3[0], (char *const *) CP_PY3);
break;
case LANG_KOTLIN:
print_compiler(CP_KT);
execvp(CP_KT[0], (char *const *) CP_KT);
break;
default:
FM_LOG_FATAL("Unknown language %d", oj_solution.lang);
break;
}
// execvp error
FM_LOG_FATAL("execvp compiler error");
exit(EXIT_COMPILE_EXEC);
} else {
// parent process: Judger
int status = 0;
if (waitpid(compiler, &status, WUNTRACED) == -1) {
FM_LOG_FATAL("waitpid for compiler failed: %s", strerror(errno));
exit(EXIT_COMPILE_ERROR); // SE
}
FM_LOG_DEBUG("compiler finished");
if ((oj_solution.lang == LANG_PYTHON27 || oj_solution.lang == LANG_PYTHON3) && file_size(stderr_compiler)) {
FM_LOG_TRACE("compile error");
output_acm_result(OJ_CE, 0, 0, 0);
exit(EXIT_OK);
}
if (WIFEXITED(status)) { // normal termination
if (EXIT_SUCCESS == WEXITSTATUS(status)) {
FM_LOG_DEBUG("compile succeeded");
} else if (GCC_COMPILE_ERROR == WEXITSTATUS(status)) {
FM_LOG_TRACE("compile error");
output_acm_result(OJ_CE, 0, 0, 0);
exit(EXIT_OK);
} else {
if (fix_gcc_result(stderr_compiler)) {
FM_LOG_WARNING("Compiler Limit Exceeded!");
output_acm_result(OJ_CE, 0, 0, 0);
exit(EXIT_OK);
} else {
FM_LOG_FATAL("compiler unknown exit status %d", WEXITSTATUS(status));
output_acm_result(OJ_CE, 0, 0, 0);
exit(EXIT_COMPILE_ERROR);
}
}
} else {
if (WIFSIGNALED(status)) { // killed by signal
int signo = WTERMSIG(status);
FM_LOG_WARNING("Compiler Limit Exceeded: %s", strsignal(signo));
output_acm_result(OJ_CE, 0, 0, 0);
stderr = freopen(stderr_compiler, "w", stderr);
fprintf(stderr, "Compiler Limit Exceeded: %s\n", strsignal(signo));
exit(EXIT_OK);
} else if (WIFSTOPPED(status)) { // stopped by signal
int signo = WSTOPSIG(status);
FM_LOG_FATAL("stopped by signal: %s\n", strsignal(signo));
} else {
FM_LOG_FATAL("unknown stop reason, status(%d)", status);
}
exit(EXIT_COMPILE_ERROR); // SE
}
}
}
int main(int argc, char *argv[], char *envp[]) {
log_open(LOG_FILE);
FM_LOG_TRACE("---");
check_pid();
int sockfd;
socklen_t clilen;
struct sockaddr_in serv_addr{};
struct sockaddr_in cli_addr{};
const char *cfg_file;
if (argc > 1) {
cfg_file = argv[1];
} else {
cfg_file = DEFAULT_CFG_FILE;
}
read_config(cfg_file);
FM_LOG_TRACE("read_config");
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
fatal_error("ERROR opening socket");
}
FM_LOG_TRACE("socket");
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
if (inet_aton(oj_config.ip, &serv_addr.sin_addr) == 0) {
serv_addr.sin_addr.s_addr = INADDR_ANY;
}
serv_addr.sin_port = htons(oj_config.port);
FM_LOG_NOTICE("IP address: %s %s", oj_config.ip, inet_ntoa(serv_addr.sin_addr));
FM_LOG_NOTICE("port: %d %d", oj_config.port, ntohs(serv_addr.sin_port));
int yes = 1;
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
fatal_error("setsockopt SO_REUSEADDR failed");
}
if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
fatal_error("ERROR on binding");
}
FM_LOG_TRACE("bind");
clilen = sizeof(cli_addr);
if (listen(sockfd, oj_config.backlog) < 0) {
fatal_error("ERROR on listening");
}
FM_LOG_NOTICE("listen backlog: %d", oj_config.backlog);
if (daemon(0, 0) == -1) {
FM_LOG_FATAL("Cannot daemonize");
pidfile_remove(pfh);
exit(EXIT_FAILURE);
}
print_word_dir();
print_user_group();
pidfile_write(pfh);
struct sigaction sa{};
sa.sa_handler = signal_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGTERM, &sa, nullptr) == -1) { // install signal hander for timeout
FM_LOG_FATAL("cannot handle SIGTERM");
exit(EXIT_FAILURE);
} else {
FM_LOG_DEBUG("set signal_handler");
}
for (int i = 0; i < oj_config.thread_num; i++) {
std::thread t(ThreadWork);
t.detach();
}
FM_LOG_NOTICE("thread count: %d", oj_config.thread_num);
std::thread(SendWork).detach();
while (isRunning) {
int newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
if (newsockfd != -1) {
work(newsockfd, cli_addr);
}
}
pidfile_remove(pfh);
close(sockfd);
return 0;
}
void send_multi_result(char *file_path, oj_solution_t &oj_solution) {
FM_LOG_TRACE("send_multi_result");
CURL *curl;
CURLM *multi_handle;
int still_running = 1;
struct curl_httppost *formpost = nullptr;
struct curl_httppost *lastptr = nullptr;
struct curl_slist *headerlist = nullptr;
static const char buf[] = "Expect:";
const size_t size = 25;
char data[size] = {0};
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "sid",
CURLFORM_COPYCONTENTS, oj_solution.sid,
CURLFORM_END);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "token",
CURLFORM_COPYCONTENTS, oj_solution.token,
CURLFORM_END);
snprintf(data, size, "%d", oj_solution.cid);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "cid",
CURLFORM_COPYCONTENTS, data,
CURLFORM_END);
snprintf(data, size, "%d", oj_solution.result);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "result",
CURLFORM_COPYCONTENTS, data,
CURLFORM_END);
snprintf(data, size, "%d", oj_solution.time_usage);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "time",
CURLFORM_COPYCONTENTS, data,
CURLFORM_END);
snprintf(data, size, "%d", oj_solution.memory_usage);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "memory",
CURLFORM_COPYCONTENTS, data,
CURLFORM_END);
snprintf(data, size, "%d", oj_solution.test);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "test",
CURLFORM_COPYCONTENTS, data,
CURLFORM_END);
if (file_path != NULL && access(file_path, F_OK) != -1) {
truncate_upload_file(file_path);
FM_LOG_NOTICE("will upload error file %s", file_path);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "error",
CURLFORM_FILE, file_path,
CURLFORM_END);
}
FM_LOG_TRACE("try curl_easy_init");
curl = curl_easy_init();
multi_handle = curl_multi_init();
headerlist = curl_slist_append(headerlist, buf);
if (curl && multi_handle) {
FM_LOG_TRACE("curl_multi_init OK");
curl_easy_setopt(curl, CURLOPT_URL, oj_config.api_url);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
curl_multi_add_handle(multi_handle, curl);
curl_multi_perform(multi_handle, &still_running);
do {
struct timeval timeout{};
int rc; /* select() return code */
CURLMcode mc; /* curl_multi_fdset() return code */
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd = -1;
long curl_timeo = -1;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
/* set a suitable timeout to play around with */
timeout.tv_sec = 1;
timeout.tv_usec = 0;
curl_multi_timeout(multi_handle, &curl_timeo);
if (curl_timeo >= 0) {
timeout.tv_sec = curl_timeo / 1000;
if (timeout.tv_sec > 1)
timeout.tv_sec = 1;
else
timeout.tv_usec = (curl_timeo % 1000) * 1000;
}
/* get file descriptors from the transfers */
mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
if (mc != CURLM_OK) {
fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
break;
}
if (maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = {0, 100 * 1000}; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
} else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
}
switch (rc) {
case -1:
/* select error */
break;
case 0:
default:
/* timeout or readable/writable sockets */
curl_multi_perform(multi_handle, &still_running);
break;
}
} while (still_running);
curl_multi_cleanup(multi_handle);
curl_easy_cleanup(curl);
curl_formfree(formpost);
curl_slist_free_all(headerlist);
FM_LOG_DEBUG("send_multi_result finished");
} else {
FM_LOG_FATAL("cannot init curl: %s", strerror(errno));
update_system_error(EXIT_CURL_ERROR, oj_solution);
}
}
static
int compare_output(std::string file_std, std::string file_exec) {
//这里可以不用写的
//仔细研究一下diff及其参数即可
//实现各种功能
FILE *fp_std = fopen(file_std.c_str(), "r");
if (fp_std == NULL) {
FM_LOG_WARNING("Open standard output file failed.");
exit(JUDGE_CONF::EXIT_COMPARE);
}
FILE *fp_exe = fopen(file_exec.c_str(), "r");
if (fp_exe == NULL) {
FM_LOG_WARNING("Open executive output file failed.");
exit(JUDGE_CONF::EXIT_COMPARE);
}
int a, b, Na = 0, Nb = 0;
enum {
AC = JUDGE_CONF::AC,
PE = JUDGE_CONF::PE,
WA = JUDGE_CONF::WA
}status = AC;
while (true) {
a = fgetc(fp_std);
b = fgetc(fp_exe);
Na++, Nb++;
//统一\r和\n之间的区别
if (a == '\r') {
a = fgetc(fp_std);
Na++;
}
if (b == '\r') {
b = fgetc(fp_std);
Nb++;
}
#define is_space_char(a) ((a == ' ') || (a == '\t') || (a == '\n'))
if (feof(fp_std) && feof(fp_exe)){
//文件结束
break;
} else if (feof(fp_std) || feof(fp_exe)) {
//如果只有一个文件结束
//但是另一个文件的末尾是回车
//那么也当做AC处理
FILE *fp_tmp;
if (feof(fp_std)) {
if (!is_space_char(b)) {
FM_LOG_TRACE("Well, Wrong Answer.");
status = WA;
break;
}
fp_tmp = fp_exe;
} else {
if (!is_space_char(a)) {
FM_LOG_TRACE("Well, Wrong Answer.");
status = WA;
break;
}
fp_tmp = fp_std;
}
int c;
while ((c = fgetc(fp_tmp)) != EOF) {
if (c == '\r') c = '\n';
if (!is_space_char(c)) {
FM_LOG_TRACE("Well, Wrong Answer.");
status = WA;
break;
}
}
break;
}
//如果两个字符不同
if (a != b) {
status = PE;
//过滤空白字符
if (is_space_char(a) && is_space_char(b)) {
continue;
}
if (is_space_char(a)) {
//a是空白字符，过滤，退回b以便下一轮循环
ungetc(b, fp_exe);
Nb--;
} else if (is_space_char(b)) {
ungetc(a, fp_std);
Na--;
} else {
FM_LOG_TRACE("Well, Wrong Answer.");
status = WA;
break;
}
}
}
fclose(fp_std);
fclose(fp_exe);
return status;
}
static
void run_spj() {
// support ljudge style special judge
const char origin_name[3][16] = {"./in.in", "./out.out", "./out.txt"};
const char target_name[4][16] = {"/input", "/output", "/user_output", "/user_code"};
for (int i = 0; i < 4; i++)
{
std::string origin_path = (i != 3) ? origin_name[i] : PROBLEM::code_path;
std::string target_path = PROBLEM::run_dir + target_name[i];
if (EXIT_SUCCESS != symlink(origin_path.c_str(), target_path.c_str()))
FM_LOG_WARNING("Create symbolic link from '%s' to '%s' failed,%d:%s.", origin_path.c_str(), target_path.c_str(), errno, strerror(errno));
}
pid_t spj_pid = fork();
int status = 0;
if (spj_pid < 0) {
FM_LOG_WARNING("fork for special judge failed.So sad.");
exit(JUDGE_CONF::EXIT_COMPARE_SPJ);
} else if (spj_pid == 0) {
FM_LOG_TRACE("Woo, I will start special judge!");
stdin = freopen(PROBLEM::input_file.c_str(), "r", stdin); // ljudge style
stdout = freopen(PROBLEM::spj_output_file.c_str(), "w", stdout);
if (stdin == NULL || stdout == NULL) {
FM_LOG_WARNING("redirect io in spj failed.");
exit(JUDGE_CONF::EXIT_COMPARE_SPJ);
}
//SPJ时间限制
if (EXIT_SUCCESS != malarm(ITIMER_REAL, JUDGE_CONF::SPJ_TIME_LIMIT)) {
FM_LOG_WARNING("Set time limit for spj failed.");
exit(JUDGE_CONF::EXIT_COMPARE_SPJ);
}
security_control_spj();
if (PROBLEM::spj_lang != JUDGE_CONF::LANG_JAVA) {
execl("./SpecialJudge", "SpecialJudge", "user_output", NULL);
} else {
execlp("java", "java", "SpecialJudge", NULL);
}
exit(JUDGE_CONF::EXIT_COMPARE_SPJ_FORK);
} else {
if (wait4(spj_pid, &status, 0, NULL) < 0) {
FM_LOG_WARNING("wait4 failed.");
exit(JUDGE_CONF::EXIT_COMPARE_SPJ);
}
if (WIFEXITED(status)) {
int spj_exit_code = WEXITSTATUS(status);
if (spj_exit_code >= 0 && spj_exit_code < 4) {
FM_LOG_TRACE("Well, SpecialJudge program normally quit.All is good.");
// 获取SPJ结果
switch (spj_exit_code) {
case 0:
PROBLEM::result = JUDGE_CONF::AC;
break;
case 1:
PROBLEM::result = JUDGE_CONF::WA;
break;
case 2:
PROBLEM::result = JUDGE_CONF::PE;
break;
}
return ;
} else {
FM_LOG_WARNING("I am sorry to tell you that the special judge program abnormally terminated. %d", WEXITSTATUS(status));
}
} else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
FM_LOG_WARNING("Well, the special judge program consume too much time.");
} else {
FM_LOG_WARNING("Actually, I do not kwon why the special judge program dead.");
}
}
}
/*
* 编译源代码
*/
static
void compiler_source_code() {
pid_t compiler = fork();
int status = 0;
if (compiler < 0) {
FM_LOG_WARNING("error fork compiler");
exit(JUDGE_CONF::EXIT_COMPILE);
} else if (compiler == 0) {
//子进程，编译程序
log_add_info("compiler");
stdout = freopen(PROBLEM::stdout_file_compiler.c_str(), "w", stdout);
stderr = freopen(PROBLEM::stderr_file_compiler.c_str(), "w", stderr);
if (stdout == NULL || stderr == NULL) {
FM_LOG_WARNING("error to freopen in compiler: stdout(%p) stderr(%p)", stdout, stderr);
exit(JUDGE_CONF::EXIT_COMPILE);
}
malarm(ITIMER_REAL, JUDGE_CONF::COMPILE_TIME_LIMIT);//设置编译时间限制
switch (PROBLEM::lang) {
case JUDGE_CONF::LANG_C:
FM_LOG_TRACE("Start: gcc -o %s %s -static -w -lm -std=c99 -O2 -DONLINE_JUDGE",
PROBLEM::exec_file.c_str(), PROBLEM::code_path.c_str());
execlp("gcc", "gcc", "-o", PROBLEM::exec_file.c_str(), PROBLEM::code_path.c_str(),
"-static", "-w", "-lm", "-std=c99", "-O2", "-DONLINE_JUDGE", NULL);
break;
case JUDGE_CONF::LANG_CPP:
FM_LOG_TRACE("Start: g++ -o %s %s -static -w -lm -O2 -DONLINE_JUDGE",
PROBLEM::exec_file.c_str(), PROBLEM::code_path.c_str());
execlp("g++", "g++", "-o", PROBLEM::exec_file.c_str(), PROBLEM::code_path.c_str(),
"-static", "-w", "-lm", "-O2", "-std=c++11", "-DONLINE_JUDGE", NULL);
break;
case JUDGE_CONF::LANG_JAVA:
FM_LOG_TRACE("Start:javac %s -d %s", PROBLEM::code_path.c_str(), PROBLEM::run_dir.c_str());
execlp("javac", "javac", PROBLEM::code_path.c_str(), "-d", PROBLEM::run_dir.c_str(), NULL);
//在这里增加新的语言支持
}
FM_LOG_WARNING("exec compiler error");
exit(JUDGE_CONF::EXIT_COMPILE);
} else {
//父进程
pid_t w = waitpid(compiler, &status, WUNTRACED); //阻塞等待子进程结束
if (w == -1) {
FM_LOG_WARNING("waitpid error");
exit(JUDGE_CONF::EXIT_COMPILE);
}
FM_LOG_TRACE("compiler finished");
if (WIFEXITED(status)) {
//编译程序自行退出
if (EXIT_SUCCESS == WEXITSTATUS(status)) {
FM_LOG_TRACE("compile succeeded.");
} else if (JUDGE_CONF::GCC_COMPILE_ERROR == WEXITSTATUS(status)){
//编译错误
FM_LOG_TRACE("compile error");
PROBLEM::result = JUDGE_CONF::CE;
get_compile_error_message();
exit(JUDGE_CONF::EXIT_OK);
} else {
FM_LOG_WARNING("Unknown error occur when compiling the source code.Exit status %d", WEXITSTATUS(status));
exit(JUDGE_CONF::EXIT_COMPILE);
}
} else {
//编译程序被终止
if (WIFSIGNALED(status)){
if (SIGALRM == WTERMSIG(status)) {
FM_LOG_WARNING("Compile time out");
PROBLEM::result = JUDGE_CONF::CE;
PROBLEM::extra_message = "Compile Out of Time Limit";
exit(JUDGE_CONF::EXIT_OK);
} else {
FM_LOG_WARNING("Unknown signal when compile the source code.");
}
} else if (WIFSTOPPED(status)){
FM_LOG_WARNING("The compile process stopped by signal");
} else {
FM_LOG_WARNING("I don't kwon why the compile process stopped");
}
exit(JUDGE_CONF::EXIT_COMPILE);
}
}
}
/*
* 执行用户提交的程序
*/
static
void judge() {
struct rusage rused;
pid_t executive = fork();
if (executive < 0) {
exit(JUDGE_CONF::EXIT_PRE_JUDGE);
} else if (executive == 0) {
//子进程，用户程序
FM_LOG_TRACE("Start Judging.");
io_redirect();
security_control();
int real_time_limit = PROBLEM::time_limit;
if (EXIT_SUCCESS != malarm(ITIMER_REAL, real_time_limit)) {
exit(JUDGE_CONF::EXIT_PRE_JUDGE);
}
set_limit();
if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) < 0) {
exit(JUDGE_CONF::EXIT_PRE_JUDGE_PTRACE);
}
if (PROBLEM::lang != JUDGE_CONF::LANG_JAVA){
execl("./a.out", "a.out", NULL);
} else {
execlp("java", "java", "Main", NULL);
}
//走到这了说明出错了
exit(JUDGE_CONF::EXIT_PRE_JUDGE_EXECLP);
} else {
//父进程
int status = 0; //子进程状态
int syscall_id = 0; //系统调用号
struct user_regs_struct regs; //寄存器
init_RF_table(PROBLEM::lang); //初始化系统调用表
while (true) {//循环监控子进程
if (wait4(executive, &status, 0, &rused) < 0) {
FM_LOG_WARNING("wait4 failed.");
exit(JUDGE_CONF::EXIT_JUDGE);
}
//自行退出
if (WIFEXITED(status)) {
if (PROBLEM::lang != JUDGE_CONF::LANG_JAVA ||
WEXITSTATUS(status) == EXIT_SUCCESS) {
FM_LOG_TRACE("OK, normal quit. All is good.");
//PROBLEM::result = JUDGE_CONF::PROCEED;
} else {
FM_LOG_WARNING("oh, some error occured.Abnormal quit.");
PROBLEM::result = JUDGE_CONF::RE;
}
break;
}
//被信号终止掉了
if (WIFSIGNALED(status) ||
(WIFSTOPPED(status) && WSTOPSIG(status) != SIGTRAP)) { //要过滤掉SIGTRAP信号
int signo = 0;
if (WIFSIGNALED(status)) {
signo = WTERMSIG(status);
FM_LOG_WARNING("child signaled by %d : %s", signo, strsignal(signo));
} else {
signo = WSTOPSIG(status);
FM_LOG_WARNING("child stop by %d : %s\n", signo, strsignal(signo));
}
switch (signo) {
//TLE
case SIGALRM:
case SIGXCPU:
case SIGVTALRM:
case SIGKILL:
FM_LOG_TRACE("Well, Time Limit Exeeded");
PROBLEM::time_usage = 0;
PROBLEM::memory_usage = 0;
PROBLEM::result = JUDGE_CONF::TLE;
break;
case SIGXFSZ:
FM_LOG_TRACE("File Limit Exceeded");
PROBLEM::time_usage = 0;
PROBLEM::memory_usage = 0;
PROBLEM::result = JUDGE_CONF::OLE;
break;
case SIGSEGV:
case SIGFPE:
case SIGBUS:
case SIGABRT:
//FM_LOG_TRACE("RE了");
PROBLEM::time_usage = 0;
PROBLEM::memory_usage = 0;
PROBLEM::result = JUDGE_CONF::RE;
break;
default:
//FM_LOG_TRACE("不知道哪儿跪了");
PROBLEM::time_usage = 0;
PROBLEM::memory_usage = 0;
PROBLEM::result = JUDGE_CONF::RE;
break;
}
ptrace(PTRACE_KILL, executive, NULL, NULL);
break;
}
//MLE
PROBLEM::memory_usage = std::max((long int)PROBLEM::memory_usage,
rused.ru_minflt * (getpagesize() / JUDGE_CONF::KILO));
if (PROBLEM::memory_usage > PROBLEM::memory_limit) {
PROBLEM::time_usage = 0;
PROBLEM::memory_usage = 0;
PROBLEM::result = JUDGE_CONF::MLE;
FM_LOG_TRACE("Well, Memory Limit Exceeded.");
ptrace(PTRACE_KILL, executive, NULL, NULL);
break;
}
//获得子进程的寄存器，目的是为了获知其系统调用
if (ptrace(PTRACE_GETREGS, executive, NULL, ®s) < 0) {
FM_LOG_WARNING("ptrace PTRACE_GETREGS failed");
exit(JUDGE_CONF::EXIT_JUDGE);
}
#ifdef __i386__
syscall_id = regs.orig_eax;
#else
syscall_id = regs.orig_rax;
#endif
//检查系统调用是否合法
if (syscall_id > 0 &&
!is_valid_syscall(PROBLEM::lang, syscall_id, executive, regs)) {
FM_LOG_WARNING("restricted fuction %d\n", syscall_id);
if (syscall_id == SYS_rt_sigprocmask){
FM_LOG_WARNING("The glibc failed.");
} else {
//FM_LOG_WARNING("%d\n", SYS_write);
FM_LOG_WARNING("restricted fuction table");
}
PROBLEM::result = JUDGE_CONF::RE;
ptrace(PTRACE_KILL, executive, NULL, NULL);
break;
}
if (ptrace(PTRACE_SYSCALL, executive, NULL, NULL) < 0) {
FM_LOG_WARNING("ptrace PTRACE_SYSCALL failed.");
exit(JUDGE_CONF::EXIT_JUDGE);
}
}
}
//这儿关于time_usage和memory_usage计算的有点混乱
//主要是为了减轻web的任务
//只要不是AC，就把time_usage和memory_usage归0
if (PROBLEM::result == JUDGE_CONF::SE){
PROBLEM::time_usage += (rused.ru_utime.tv_sec * 1000 +
rused.ru_utime.tv_usec / 1000);
PROBLEM::time_usage += (rused.ru_stime.tv_sec * 1000 +
rused.ru_stime.tv_usec / 1000);
}
}
int oj_compare_output(const char *file_out, const char *file_user) {
FM_LOG_TRACE("start compare");
FILE *fp_std = fopen(file_out, "r");
if (fp_std == nullptr) {
FM_LOG_FATAL("open standard output file (%s) failed: %s", file_out, strerror(errno));
exit(EXIT_COMPARE);
}
FILE *fp_exe = fopen(file_user, "r");
if (fp_exe == nullptr) {
FM_LOG_FATAL("open user output file (%s) failed: %s", file_user, strerror(errno));
exit(EXIT_COMPARE);
}
int a, b, Na = 0, Nb = 0;
enum {
AC = OJ_AC,
PE = OJ_PE,
WA = OJ_WA
} status = AC;
while (true) {
/*
* Windows / DOS uses '\r\n';
* Unix / Linux / OS X uses '\n';
* Macs before OS X use '\r';
* TODO(power): out file with '\r' line ending get incorrect PE
*/
while ((a = fgetc(fp_std)) == '\r') {}
while ((b = fgetc(fp_exe)) == '\r') {}
Na++, Nb++;
// deal with '\r' and '\n'
if (a == '\r') a = '\n';
if (b == '\r') b = '\n';
if (feof(fp_std) && feof(fp_exe)) {
break;
} else if (feof(fp_std) || feof(fp_exe)) {
// deal with tailing white spaces
FILE *fp_tmp;
if (feof(fp_std)) {
FM_LOG_TRACE("std out file ended");
if (!is_space_char(b)) {
FM_LOG_TRACE("WA exe['%c':0x%x @%d]", b, b, Nb);
status = WA;
break;
}
fp_tmp = fp_exe;
} else { /* feof(fp_exe) */
FM_LOG_TRACE("user out file ended");
if (!is_space_char(a)) {
FM_LOG_TRACE("WA std['%c':0x%x @%d]", a, a, Na);
status = WA;
break;
}
fp_tmp = fp_std;
}
int c;
while (c = fgetc(fp_tmp), c != EOF) {
if (c == '\r') c = '\n';
if (!is_space_char(c)) {
FM_LOG_TRACE("WA ['%c':0x%x]", c, c);
status = WA;
break;
}
}
break;
}
if (a != b) {
status = PE;
if (is_space_char(a) && is_space_char(b)) {
continue;
}
if (is_space_char(a)) {
ungetc(b, fp_exe);
Nb--;
} else if (is_space_char(b)) {
ungetc(a, fp_std);
Na--;
} else {
FM_LOG_TRACE("WA ['%c':0x%x @%d] : ['%c':0x%x @%d]", a, a, Na, b, b, Nb);
status = WA;
break;
}
}
} // end of while
fclose(fp_std);
fclose(fp_exe);
if (status == WA || status == PE) {
make_diff_out2(file_out, file_user, oj_solution.work_dir, file_out);
}
FM_LOG_TRACE("compare finished, result=%s", status == AC ? "AC" : (status == PE ? "PE" : "WA"));
return status;
}
void run(oj_solution_t &oj_solution) {
if (oj_solution.cid > 0) {
snprintf(oj_solution.work_dir, PATH_SIZE, "%s/c%d", oj_config.temp_dir, oj_solution.cid);
} else {
strncpy(oj_solution.work_dir, oj_config.temp_dir, strlen(oj_config.temp_dir) + 1);
}
char stderr_file[PATH_SIZE];
snprintf(stderr_file, PATH_SIZE, "%s/%s/error.txt", oj_solution.work_dir, oj_solution.sid);
FM_LOG_NOTICE("/usr/local/bin/powerjudge -s %s -p %s -l %s -t %s -m %s -w %s -D %s",
oj_solution.sid, oj_solution.pid, oj_solution.language,
oj_solution.time_limit, oj_solution.memory_limit,
oj_solution.work_dir, oj_config.data_dir);
pid_t pid = fork();
if (pid < 0) {
FM_LOG_FATAL("fork judger failed: %s", strerror(errno));
SendQueue.push(std::make_pair(EXIT_FORK_ERROR, oj_solution));
} else if (pid == 0) {
execl("/usr/local/bin/powerjudge",
"/usr/local/bin/powerjudge",
"-s", oj_solution.sid,
"-p", oj_solution.pid,
"-l", oj_solution.language,
"-t", oj_solution.time_limit,
"-m", oj_solution.memory_limit,
"-w", oj_solution.work_dir,
"-D", oj_config.data_dir,
"-c", std::to_string(oj_solution.cid).c_str(),
NULL);
stderr = freopen(stderr_file, "a+", stderr);
FM_LOG_FATAL("exec error: %s", strerror(errno));
SendQueue.push(std::make_pair(EXIT_EXEC_ERROR, oj_solution));
} else {
int status = 0;
FM_LOG_TRACE("process ID=%d", pid);
if (waitpid(pid, &status, WUNTRACED) == -1) {
FM_LOG_FATAL("waitpid for judger failed: %s", strerror(errno));
}
if (WIFEXITED(status)) // normal termination
{
if (EXIT_SUCCESS == WEXITSTATUS(status)) {
FM_LOG_DEBUG("judge succeeded");
SendQueue.push(std::make_pair(EXIT_OK, oj_solution));
} else if (EXIT_COMPILE_ERROR == WEXITSTATUS(status)) {
FM_LOG_TRACE("compile error");
SendQueue.push(std::make_pair(EXIT_OK, oj_solution));
} else if (EXIT_JUDGE == WEXITSTATUS(status)) {
FM_LOG_TRACE("judge error");
SendQueue.push(std::make_pair(OJ_SE, oj_solution));
} else {
FM_LOG_TRACE("judge error");
SendQueue.push(std::make_pair(WEXITSTATUS(status), oj_solution));
}
} else {
if (WIFSIGNALED(status)) // killed by signal
{
int signo = WTERMSIG(status);
FM_LOG_WARNING("judger killed by signal: %s", strsignal(signo));
SendQueue.push(std::make_pair(signo, oj_solution));
} else if (WIFSTOPPED(status)) // stopped by signal
{
int signo = WSTOPSIG(status);
FM_LOG_FATAL("judger stopped by signal: %s\n", strsignal(signo));
SendQueue.push(std::make_pair(signo, oj_solution));
} else {
FM_LOG_FATAL("judger stopped with unknown reason, status(%d)", status);
SendQueue.push(std::make_pair(EXIT_UNKNOWN, oj_solution));
}
}
}
}