Program stops working after a time with "libncurses.so.5 Error 24"

[zachlac]

The error is:
error while loading shared libraries: libncurses.so.5: cannot open shared object file: Error 24

This occurs after a good time of running, after I added some file stuff to my code. I can't see why this is happening.

Code:

  
    // Get CPU Temperature
    char sensorsRaw[128];
    system("sensors >& .sensors");
    std::ifstream fileIn;
    fileIn.open(".sensors");
    if( !fileIn.is_open() )
    {
      printf("ERROR: .sensors file read failed.\n");
    }
    else
    {
      while( !fileIn.eof() )
      {
        fileIn.getline(sensorsRaw, 128);
        std::string sensorsStr(sensorsRaw);
        std::string tempStr = sensorsStr.substr(0, 5);
        if( tempStr.compare("temp1") == 0 )
        {
          std::string value = sensorsStr.substr(14, 7);
          int pointIndex = value.find_first_of(".");
          int degIndex = value.find_first_of("°");
          int index = 2;
          if( degIndex != -1 &&
              degIndex < pointIndex )
            index = degIndex;
          else
            index = pointIndex;
          std::string roundedVal = value.substr(0, index);
          int valInt = atoi( roundedVal.c_str() );
          std::cout << "CPU Temp: " << value << std::endl;
          break;
        } // end: if( tempStr.compare() == 0 )
      } // end: while( !file.eof() )
    } // end: else( file.is_open() )
    fileIn.close();
    system("rm .sensors");

    //Get CPU clocked speed
    char cpuinfoRaw[128];
    system("cat /proc/cpuinfo >& .cpuinfo");
    std::ifstream cpuinfoIn;
    cpuinfoIn.open(".cpuinfo");
    if( !cpuinfoIn.is_open() )
    {
      printf("ERROR: .cpuinfo file read failed.\n");
    } 
   else
    {
      while( !cpuinfoIn.eof() )
      {
        cpuinfoIn.getline(cpuinfoRaw, 128);
        std::string cpuinfoStr(cpuinfoRaw);
        std::string cpuStr = cpuinfoStr.substr(0, 7);
        if( cpuStr.compare("cpu MHz") == 0 )
        {
          std::string value = cpuinfoStr.substr(11, 8);
          int index = value.find_first_of(".");
          std::string roundedVal = value.substr(0, index);
          std::cout << "CPU Throttled speed: " << value << std::endl;
          break;
        }
      } // end: while( !cpuinfoIn.eof() )
      cpuinfoIn.close();
    } // end: else( cpuinfoIn.is_open() )
    system("rm .cpuinfo");
    sleep(CYCLETIME);

[Rubberman]

Where are you using ncurses functions in your application?

[zachlac]

I have no idea where libncurses is called.

This is the only part I left out, called just inside the while loop. I didn't include it, because the code runs fine with the part I provided omitted. However, here it is.

 //Check computer for connectivity
    int ret = 0;
    ret = pingHost((char*) "computer", 1);

Function definition:

int pingHost( char* hostToPing, int timeout )
{
  struct sockaddr_in *to = (struct sockaddr_in *) &whereto;
  struct protoent *proto;  

  bzero( (char *)&whereto, sizeof(struct sockaddr) );
  to->sin_family = AF_INET;
  to->sin_addr.s_addr = inet_addr(hostToPing);
  if(to->sin_addr.s_addr != (unsigned)-1) 
  {
    strcpy(hnamebuf, hostToPing);
    hostname = hnamebuf;
  } 
  else 
  {
    hp = gethostbyname(hostToPing);
    if(hp) 
    {
      to->sin_family = hp->h_addrtype;
      bcopy(hp->h_addr, (caddr_t)&to->sin_addr, hp->h_length);
      hostname = hp->h_name;
    } 
    else 
    {
      return pingUnknownHost;
    }
  }

  ident = getpid() & 0xFFFF;

  if ((proto = getprotobyname("icmp")) == NULL) 
  {
    return pingUnknownProtocol;
  }

  if ((sd = socket(AF_INET, SOCK_RAW, proto->p_proto)) < 0) 
  {
    //Usually caused by not running as root
    return pingSocketError;
  }
  //Set socket timeout
  struct timeval recvTimeout;
  recvTimeout.tv_sec = timeout;
  setsockopt(sd, SOL_SOCKET, SO_RCVTIMEO, &recvTimeout, sizeof(recvTimeout));

  //Set up receive variables
  int cc;
  u_char packet[MAXPACKET];
  int len = sizeof (packet);
  socklen_t fromlen = sizeof(from);

  //Send ping
  int pingerRet = pingtest_pinger();
  if( pingerRet == pingSendingFailed ||
      pingerRet == pingUnknownError )
  {
    return pingerRet;
  }

  //Wait for return
  if ( ( cc = recvfrom(sd, packet, len, 0, &from, &fromlen) ) < 0) 
  {
    return pingReceiveFailed;
  }

  //printf("Packet: %x, %x, %x, %x\n", packet[0], packet[1], packet[2], packet[3]);
  struct ip *ip = (struct ip *) packet;
  struct icmp *icp;
  int hlen = ip->ip_hl << 2; 
  if (cc < hlen + ICMP_MINLEN) 
  {
    printf("packet too short (%d bytes)\n", cc);
  }
  cc -= hlen;
  icp = (struct icmp *)(packet + hlen);
  
  if( icp->icmp_type == ICMP_ECHOREPLY )
  {
    return pingSuccess;
  }
  else if( icp->icmp_type == ICMP_DEST_UNREACH )
  {
    return pingUnreachable;
  }
  else if( icp->icmp_type == ICMP_SOURCE_QUENCH )
  {
    return pingSourceQuench;
  }
  else if( icp->icmp_type == ICMP_REDIRECT )
  {
    return pingRedirect;
  }
  else if( icp->icmp_type == ICMP_ECHO )
  {
    return pingEcho;
  }
  else if( icp->icmp_type == ICMP_TIME_EXCEEDED )
  {
    return pingTimeExceeded;
  }
  else if( icp->icmp_type == ICMP_PARAMETERPROB )
  {
    return pingParameterProb;
  }
  else
  {
    return pingUnknownError;
  }

  //Shouldn't get here
  return pingUnknownError;
}

Assume that some of these extra functions are included elsewhere. I've tested the ping code, and it works.

Some symptoms of this problem:
* The code went through 2039 iterations before erroring, with a cycle time of 3 seconds, so it ran successfully for an 1h42.
* It just immediately starts spewing the error:
sh: error while loading shared libraries: libncurses.so.5: cannot open shared object file: Error 24
* Then, on iteration 2184, it starts with new errors:
ERROR: .sensors file read failed.
ERROR: .cpuinfo file read failed.
"computer": Unknown Host (check /etc/hosts file)
* From that point on, the errors are interspersed for the rest of the run.

[Rubberman]

How are you starting this program? In a command-line shell, or something else? What shell are you using?