root/crashRun.c

/*
 * crashRun - execute command with restricted CPU time and memory usage
 *
 * Copyright (C)
 *      2005, 2006 Thomas Kuehne <thomas@kuehne.cn>
 *      2005 Anders F Björrklund <afb@algonet.se> (BSD)
 *      2005 Stewart Gordon <smjg_1998@yahoo.com> (Windows)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $HeadURL$
 * $Date$
 * $Author$
 *
 */

#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>

#undef WAIT_GUARD
#define WAIT_GUARD 3

/* time-out in seconds
 * Posix: cpu time(timeOut) and system time(timeOut * WAIT_GUARD)
 * Windows: system time(timeOut)
 */
long int timeOut;

/* max memory usage in megabytes (Posix only) */
long int memoryLimit;

/* identify system API */
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) || defined(_BSD_SOURCE) || defined(_SVID_SOURCE)
#define USE_POSIX 1
#endif

#if defined(__GNU_LIBRARY__) || defined(__GLIBC__)
#define USE_POSIX 1
#endif

#if defined(linux) || defined(__FreeBsd__) || defined(__OpenBSD__)
#define USE_POSIX 1
#endif

#if defined(__APPLE__) && defined(__MACH__)
#define USE_POSIX 1
#endif

#if !defined(USE_POSIX) && \
    (defined(WINDOWS) || defined(WIN) || defined(WINVER) || defined(WIN32) \
    || defined(WIN64))
#define USE_WINDOWS 1
#endif


/* is the environment sane? */
#if defined(USE_POSIX) && defined(USE_WINDOWS)
#error USE_WINDOWS and USE_POSIX are defined
#endif

#if !defined(USE_POSIX) && !defined(USE_WINDOWS)
#error neither USE_POSIX nor USE_WINDOWS are defined
#endif


/* API inludes and config */
#ifdef USE_POSIX
#define USE_POSIX_LIMITS
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>
static pid_t pID;
#endif

#ifdef USE_POSIX_LIMITS
#ifndef USE_POSIX
#error USE_POSIX_LIMITS requires USE_POSIX
#endif
#include <sys/resource.h>
#include <sys/types.h>
#endif

#ifdef USE_WINDOWS
#include <windows.h>
#define snprintf _snprintf
#endif



#ifdef USE_POSIX

void handleSignal(int signalID){
    if( signalID==SIGALRM
#ifdef SIGXCPU
        || signalID==SIGXCPU
#endif
    )
        printf("EXIT CODE: signal %d (time-out after CPU/total %li/%li seconds)\n",
                signalID, timeOut, timeOut * WAIT_GUARD);
    else
        printf("EXIT CODE: signal %d, errno %d\n", signalID, errno);

    fflush(stdout);
    fflush(stderr);

    kill(-pID, SIGTERM);
    sleep(1);
    kill(-pID, SIGKILL);

    exit(EXIT_FAILURE);
}

void setupLimits(){
    struct rlimit limit;

    limit.rlim_cur = timeOut;
    limit.rlim_max = timeOut;
    if(0!=setrlimit(RLIMIT_CPU, &limit)){
        fprintf(stderr, "failed to set cpu limit [%d]\n", errno);
        exit(EXIT_FAILURE);
    }

    limit.rlim_cur = memoryLimit * 1024L * 1024L;
    limit.rlim_max = memoryLimit * 1024L * 1024L;
#ifdef RLIMIT_AS
    if(0!=setrlimit(RLIMIT_AS, &limit)){
        fprintf(stderr, "failed to set mem limit (AS) %s [%d]\n", strerror(errno), errno);
        exit(EXIT_FAILURE);
    }
#endif

    if(0!=setrlimit(RLIMIT_DATA, &limit)){
        fprintf(stderr, "failed to set mem limit (DATA) %s [%d]\n", strerror(errno), errno);
        exit(EXIT_FAILURE);
    }

    if(0!=setrlimit(RLIMIT_RSS, &limit)){
        fprintf(stderr, "failed to set mem limit (RSS) %s [%d]\n", strerror(errno), errno);
        exit(EXIT_FAILURE);
    }
#if defined(RLIMIT_MEMLOCK) && !defined(linux)
    if(0!=setrlimit(RLIMIT_MEMLOCK, &limit)){
        fprintf(stderr, "failed to set mem limit (MEMLOCK): %s [%d]\n", strerror(errno), errno);
        exit(EXIT_FAILURE);
    }
#endif
}

void setupHandlers(){
#ifdef SIGHUP
    signal(SIGHUP, &handleSignal);
#endif
    signal(SIGINT, &handleSignal);
#ifdef SIGQUIT
    signal(SIGQUIT, &handleSignal);
#endif
    signal(SIGILL, &handleSignal);
#ifdef SIGTRAP
    signal(SIGTRAP, &handleSignal);
#endif
    signal(SIGABRT, &handleSignal);
#ifdef SIGIOT
    signal(SIGIOT, &handleSignal);
#endif
#ifdef SIGBUS
    signal(SIGBUS, &handleSignal);
#endif
    signal(SIGFPE, &handleSignal);
#ifdef SIGUSR1
    signal(SIGUSR1, &handleSignal);
#endif
    signal(SIGSEGV, &handleSignal);
#ifdef SIGUSR2
    signal(SIGUSR2, &handleSignal);
#endif
#ifdef SIGPIPE
    signal(SIGPIPE, &handleSignal);
#endif
    signal(SIGALRM, &handleSignal);
    signal(SIGTERM, &handleSignal);
#ifdef SIGSTKFLT
    signal(SIGSTKFLT, &handleSignal);
#endif
#ifdef SIGTSTP
    signal(SIGTSTP, &handleSignal);
#endif
#ifdef SIGXCPU
    signal(SIGXCPU, &handleSignal);
#endif
#ifdef SIGXFSZ
    signal(SIGXFSZ, &handleSignal);
#endif
#ifdef SIGVTALRM
    signal(SIGVTALRM, &handleSignal);
#endif
#ifdef SIGSYS
    signal(SIGSYS, &handleSignal);
#endif
}
#endif /* USE_POSIX */

char* reconstructCmd(int argc, char** argv){
    size_t cmdLen=1;
    size_t tmpLen;
    size_t i;
    char* tmp;
    char* cmd;

    for(i=0; i<argc; i++){
        cmdLen+=strlen(argv[i]);
        cmdLen+=1;
    }

    cmd = (char*) malloc(++cmdLen);
    if(!cmd){
        fprintf(stderr, "failed to allocate enough memory");
        exit(EXIT_FAILURE);
    }

    *cmd = '\x00';
    tmp = cmd;

    for(i=0; i<argc; i++){
        tmpLen = snprintf(tmp, cmdLen, "%s ", argv[i]);
        tmp += tmpLen;
        cmdLen -= tmpLen;
    }
    return cmd;
}

int main(int argc, char** argv){
    char* cmd;
    char* end;

    if(argc<4){
        fprintf(stderr, "crashRun <timeOut (s)> <maxMemory (MB)> <command> [<command arg> ...]\n");
        return EXIT_FAILURE;
    }
    timeOut = strtol(argv[1], &end, 10);
    if(*end){
        fprintf(stderr, "the timeOut argument contains the illegal character: %c (0x%X)", *end, *end);
        return EXIT_FAILURE;
    }else if(timeOut < 1){
        fprintf(stderr, "minimum timeOut is 1 second, got %li seconds\n", timeOut);
        return EXIT_FAILURE;
    }

    memoryLimit = strtol(argv[2], &end, 10);
    if(*end){
        fprintf(stderr, "the maxMemory argument contains the illegal character: %c (0x%X)", *end, *end);
        return EXIT_FAILURE;
    }else if(memoryLimit < 1){
        fprintf(stderr, "minimum memoryLimit is 1MB second, got %li MB\n", memoryLimit);
        return EXIT_FAILURE;
    }
    cmd = reconstructCmd(argc-3, argv+3);

#ifdef DEBUG
        printf("cmd[%li sec, %li MB]: %s \n", timeOut, memoryLimit, cmd);
#endif

#ifdef USE_POSIX
    setupLimits();
    pID = fork();
    if(pID == 0){
        /* child */
        pID=setsid();
        printf("EXIT CODE: %d\n", system(cmd));
    }else if(pID < 0){
        fprintf(stderr, "failed to fork\n");
        return EXIT_FAILURE;
    }else{
        /* parent */
        setupHandlers();
#if !(defined(USE_POSIX_LIMITS) && defined(SIGXCPU))
        alarm(timeOut);
#else
        /* safe guard against childs without CPU usage */
        alarm(timeOut * WAIT_GUARD);
#endif
        wait(NULL);
    }
    return EXIT_SUCCESS;
#elif USE_WINDOWS
    /* BUG: maxMemory not implemented */

    PROCESS_INFORMATION processInfo;
    STARTUPINFO startupInfo;
    SECURITY_ATTRIBUTES sa = {
        sizeof(SECURITY_ATTRIBUTES), NULL, TRUE
    };
    unsigned long exitCode;
    long int timeLeft = timeOut;    /* time limit in iterations of WFX loop */

    memset(&processInfo, 0, sizeof(PROCESS_INFORMATION));
    memset(&startupInfo, 0, sizeof(STARTUPINFO));
    startupInfo.cb = sizeof(STARTUPINFO);

    if (!CreateProcess(NULL, cmd, NULL, NULL, TRUE, 0, NULL, NULL,
          &startupInfo, &processInfo)) {
        void *message;

        FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER
          | FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
           (char*) &message, 0, NULL);

        /* this should never happen */
        fprintf(stderr, "ERROR running %s:\n", cmd);
        fprintf(stderr, "%s\n", message);
        LocalFree((HLOCAL) message);
        return RAND_MAX;
    }

    /* wait for exit */
    while (TRUE) {
        Sleep(1000);
        GetExitCodeProcess(processInfo.hProcess, &exitCode);
        if (exitCode == 0x103) {
            if (--timeLeft == 0) {
                TerminateProcess(processInfo.hProcess, EXIT_FAILURE);
                printf("EXIT CODE: timeout after %li seconds\n", timeOut);
                Sleep(100);
                return EXIT_SUCCESS;
            }
        } else {
            printf("EXIT CODE: %i\n", exitCode);
            return EXIT_SUCCESS;
        }
    }

    fprintf(stderr, "crashRun: BUG\n");
    return EXIT_FAILURE;
#else

#error no implmentation for your system found (supported: Posix, Windows)

#endif /* USE_POSIX else */
}