static int read_cpuinfo(const char *field, char *value, int len)

{

    FILE *f;

    int ret = -1;

    int field_len = strlen(field);

    char line[512];



    f = fopen("/proc/cpuinfo", "r");

    if (!f) {

        return -1;

    }



    do {

        if(!fgets(line, sizeof(line), f)) {

            break;

        }

        if (!strncmp(line, field, field_len)) {

            strncpy(value, line, len);

            ret = 0;

            break;

        }

    } while(*line);



    fclose(f);



    return ret;

}
