Exemplo n.º 1
0
int maintain_wops(struct wops_state *w)
{
  struct timeval now, delta;

  while(w->w_line == NULL){

#ifdef DEBUG
    fprintf(stderr, "maintain: attemping reconnect\n");
#endif
  
    w->w_line = create_name_rpc_katcl(w->w_server);

    if(w->w_line == NULL){

      gettimeofday(&now, NULL);

      if(cmp_time_katcp(&(w->w_when), &now) <= 0){
        return -1;
      }

      sub_time_katcp(&delta, &(w->w_when), &now);
      if(delta.tv_sec > 0){
        delta.tv_sec = 1;
        delta.tv_usec = 0;
      }

      select(0, NULL, NULL, NULL, &delta);
    }
  }

  return 0;
}
Exemplo n.º 2
0
int main(int argc, char **argv)
{
  struct set *ss;
  struct remote *rx;
  struct katcl_parse *px;
  struct katcl_line *k;
  struct timeval delta, start, stop;
  fd_set fsr, fsw;

  char *app, *parm, *cmd, *copy, *ptr, *servers, *extra, *label;
  int i, j, c, fd, mfd, count;
  int verbose, result, status, info, timeout, flags, show, munge, once;
  int xmit, code;
  unsigned int len;
  
  servers = getenv("KATCP_SERVER");
  if(servers == NULL){
    servers = "localhost:7147";
  }
  
  once = 1;
  munge = 0;
  info = 1;
  verbose = 1;
  i = j = 1;
  app = argv[0];
  timeout = 0;
  k = NULL;
  show = 1;
  parm = NULL;
  extra = NULL;
  label = KCPPAR_NAME;
  count = 0;
  px = NULL;

  k = create_katcl(STDOUT_FILENO);
  if(k == NULL){
    fprintf(stderr, "%s: unable to create katcp message logic\n", app);
    return 4;
  }

  ss = create_set();
  if(ss == NULL){
    sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to set up command set data structures");
    return 4;
  }

  xmit = (-1);

  while (i < argc) {
    if (argv[i][0] == '-') {
      c = argv[i][j];
      switch (c) {

        case 'h' :
          usage(app);
          return 0;
        case 'i' : 
          info = 1 - info;
          j++;
          break;

        case 'm' : 
          munge = 1;
          j++;
          break;

        case 'n' : 
          show = 0;
          j++;
          break;


        case 'q' : 
          verbose = 0;
          j++;
          break;

        case 'x' : 
          xmit = 0;
          j++;
          break;

        case 'l' :
        case 's' :
        case 't' :

          j++;
          if (argv[i][j] == '\0') {
            j = 0;
            i++;
          }
          if (i >= argc) {
            sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "argument needs a parameter");
            return 2;
          }

          switch(c){
            case 'l' :
              label = argv[i] + j;
              break;
            case 's' :
              servers = argv[i] + j;
              break;
            case 't' :
              timeout = atoi(argv[i] + j);
              break;
          }

          i++;
          j = 1;
          break;

        case 'v' : 
          verbose++;
          j++;
          break;

        case '-' :
          j++;
          break;
        case '\0':
          j = 1;
          i++;
          break;
        default:
          sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unknown option -%c", argv[i][j]);
          return 2;
      }
    } else {

      copy = NULL;

      if(xmit < 0){
        /* WARNING: this could make error detection worse */
        xmit = 0;
      }

      if(xmit == 0){
        px = create_referenced_parse_katcl();
        if(px == NULL){
          sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to create parse instance for <%s ...>", argv[i]);
          return 4;
        }

        switch(argv[i][0]){
          case KATCP_REQUEST : 
          case KATCP_REPLY   :
          case KATCP_INFORM  :
            ptr = argv[i];
            break;
          default :
            copy = malloc(strlen(argv[i]) + 1);
            if(copy == NULL){
              sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to allocate temporary storage for %s", argv[i]);
              return 4;
            }
            copy[0] = KATCP_REQUEST;
            strcpy(copy + 1, argv[i]);
            ptr = copy;
            break;
        }
        flags = KATCP_FLAG_FIRST;
      } else {
        ptr = argv[i];
        flags = 0;
      }

      i++;
      j = 1;
      if((i >= argc) || (argv[i][0] == '-')){
        flags |= KATCP_FLAG_LAST;
      }

      if(add_string_parse_katcl(px, flags, ptr) < 0){
        sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to add parameter %s", ptr);
        return 4;
      }

      if(flags & KATCP_FLAG_LAST){
#ifdef DEBUG
        fprintf(stderr, "par: loading command for servers %s\n", servers);
#endif
        if(load_parse_set(ss, servers, px) < 0){
          sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to load command into server set %s", servers);
          return 4;
        }
        destroy_parse_katcl(px);
        px = NULL;
      }

      if(copy){
        free(copy);
        copy = NULL;
      }

      xmit++;
    }
  }

  if(timeout == 0){
    timeout = 5000 * ss->s_count;
  }

  gettimeofday(&start, NULL);

  delta.tv_sec = timeout / 1000;
  delta.tv_usec = (timeout % 1000) * 1000;

  add_time_katcp(&stop, &start, &delta);

  if(activate_remotes(ss, k) < 0){
    sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to initiate connections to remote servers");
    return 3;
  }

  for(ss->s_finished = 0; ss->s_finished < ss->s_count;){

    mfd = 0;
    FD_ZERO(&fsr);
    FD_ZERO(&fsw);

    if(k){
      if(flushing_katcl(k)){
        mfd = fileno_katcl(k);
        FD_SET(mfd, &fsw);
      }
    }

    for(i = 0; i < ss->s_count; i++){
      rx = ss->s_vector[i];
      if(rx->r_line){
        fd = fileno_katcl(rx->r_line);
        if(fd > mfd){
          mfd = fd;
        }
      } else {
        fd = (-1); /* WARNING: live dangerously */
      }

      switch(rx->r_state){
        case RX_SETUP :
          FD_SET(fd, &fsw);
          break;
        case RX_UP :
          if(flushing_katcl(rx->r_line)){ /* only write data if we have some */
            FD_SET(fd, &fsw);
          }
          FD_SET(fd, &fsr);
          break;
          /* case RX_OK : */
          /* case RX_FAIL : */
          /* case RX_BAD  : */
        default :
          break;
      }
    }

    gettimeofday(&start, NULL);
    sub_time_katcp(&delta, &stop, &start);

    result = select(mfd + 1, &fsr, &fsw, NULL, &delta);
    switch(result){
      case -1 :
        switch(errno){
          case EAGAIN :
          case EINTR  :
            continue; /* WARNING */
          default  :
            sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "select failed: %s", strerror(errno));
            return 4;
        }
        break;
      case  0 :
        sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "requests timed out after %dms", timeout);
        /* could terminate cleanly here, but ... */
        return 3;
    }

    if(k){
      fd = fileno_katcl(k);
      if(FD_ISSET(fd, &fsw)){
        write_katcl(k); /* WARNING: ignores write failures - unable to do much about it */
      }
    }

    for(i = 0; i < ss->s_count; i++){
      rx = ss->s_vector[i];
      if(rx->r_line){
        fd = fileno_katcl(rx->r_line);
      } else {
        fd = (-1); /* WARNING: live dangerously, will cause select to core dump if logic is incorrect */
      }

      switch(rx->r_state){
        case RX_SETUP :
          if(FD_ISSET(fd, &fsw)){
            len = sizeof(int);
            result = getsockopt(fd, SOL_SOCKET, SO_ERROR, &code, &len);
            if(result == 0){
              switch(code){
                case 0 :
                  if(verbose){
                    log_message_katcl(k, KATCP_LEVEL_DEBUG, label, "async connect to %s succeeded", rx->r_name);
                  }
                  if(next_request(rx) < 0){
                    log_message_katcl(k, KATCP_LEVEL_ERROR, label, "failed to load request for destination %s", rx->r_name);
                    update_state(ss, rx, RX_BAD);
                  } else {
                    update_state(ss, rx, RX_UP);
                  }
                  break;
                case EINPROGRESS :
                  log_message_katcl(k, KATCP_LEVEL_WARN, label, "saw an in progress despite write set being ready on job %s", rx->r_name);
                  break;
                default :
                  log_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to connect to %s: %s", rx->r_name, strerror(code));
                  update_state(ss, rx, RX_BAD);
                  break;
              }
            }
          }
          break;
        case RX_UP :

          if(FD_ISSET(fd, &fsw)){ /* flushing things */
            result = write_katcl(rx->r_line);
            if(result < 0){
              log_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to write to %s: %s", rx->r_name, strerror(error_katcl(rx->r_line)));
              update_state(ss, rx, RX_BAD);
            }
          }

          if(FD_ISSET(fd, &fsr)){ /* get things */
            result = read_katcl(rx->r_line);
            if(result){
              if(result < 0){
                log_message_katcl(k, KATCP_LEVEL_ERROR, label, "read from %s failed: %s", rx->r_name, strerror(error_katcl(rx->r_line)));
              } else {
                log_message_katcl(k, KATCP_LEVEL_WARN, label, "%s disconnected", rx->r_name);
              }
            }
          }

          while(have_katcl(rx->r_line) > 0){ /* compute */


            cmd = arg_string_katcl(rx->r_line, 0);
            if(cmd){
#ifdef DEBUG
              fprintf(stderr, "reading message <%s ...>\n", cmd);
#endif
              switch(cmd[0]){
                case KATCP_INFORM : 
                  if(info){
                    if(show == 0){
                      if(!strcmp(KATCP_VERSION_CONNECT_INFORM, cmd)){
                        break;
                      }
                      if(!strcmp(KATCP_VERSION_INFORM, cmd)){
                        break;
                      }
                      if(!strcmp(KATCP_BUILD_STATE_INFORM, cmd)){
                        break;
                      }
                    }
                    relay_katcl(rx->r_line, k);
                  }
                  break;
                case KATCP_REPLY : 

                  switch(cmd[1]){
                    case ' '  :
                    case '\n' : 
                    case '\r' :
                    case '\t' :
                    case '\\' :
                    case '\0' :
                      log_message_katcl(k, KATCP_LEVEL_ERROR, label, "unreasonable response message from %s", rx->r_name);
                      update_state(ss, rx, RX_BAD);
                      break;
                    default : 
                      ptr = cmd + 1;
                      if(strcmp(ptr, rx->r_match)){
                        log_message_katcl(k, KATCP_LEVEL_ERROR, label, "downstream %s returned response %s which was never requested", rx->r_name, ptr);
                        update_state(ss, rx, RX_BAD);
                      } else {
                        parm = arg_string_katcl(rx->r_line, 1);
                        if(parm){
                          if(strcmp(parm, KATCP_OK) == 0){
                            count++;
                            if(munge){
                              log_message_katcl(k, KATCP_LEVEL_INFO, label, "%s %s ok", rx->r_name, ptr);
                            } 
                            if(verbose > 1){
                              log_message_katcl(k, KATCP_LEVEL_TRACE, label, "request %s to %s returned ok", ptr, rx->r_name);
                            }
                            result = next_request(rx);
                            if(result){
                              if(result < 0){
                                sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to queue request %s to %s", ptr, rx->r_name);
                                update_state(ss, rx, RX_BAD);
                              } else {
                                update_state(ss, rx, RX_OK);
                              } 
                            }
                          } else {
                            if(munge){
                              extra = arg_string_katcl(rx->r_line, 2);
                              log_message_katcl(k, KATCP_LEVEL_ERROR, label, "%s %s %s (%s)", rx->r_name, ptr, parm, extra ? extra : "no extra information");
                            } 
                            if(verbose > 0){
                              log_message_katcl(k, KATCP_LEVEL_ERROR, label, "downstream %s unable to process %s with status %s (%s)", rx->r_name, cmd, parm, extra ? extra : "no extra information");
                            }
                            update_state(ss, rx, RX_FAIL);
                          }
                        } else {
                          log_message_katcl(k, KATCP_LEVEL_ERROR, label, "response %s without status from %s", cmd, rx->r_name);
                          update_state(ss, rx, RX_FAIL);
                        }
                      }
                      break;
                  }
                  break;
                case KATCP_REQUEST : 
                  log_message_katcl(k, KATCP_LEVEL_WARN, label, "encountered unanswerable request %s", cmd);
                  update_state(ss, rx, RX_BAD);
                  break;
                default :
                  if(once){
                    log_message_katcl(k, KATCP_LEVEL_WARN, label, "read malformed message %s from %s", cmd, rx->r_name);
                    once = 1;
                  }
                  break;
              }

            }
          }
          break;

        /* case RX_OK : */
        /* case RX_FAIL : */
        /* case RX_BAD : */
        default :
          break;
      }
    }
  }

  status = ss->s_status;

  destroy_set(ss);

  if(verbose){
    if(status > 0){
      log_message_katcl(k, KATCP_LEVEL_WARN, label, "command sequence failed after operation %d", count);
    } else {
      if(count > 0){
        log_message_katcl(k, KATCP_LEVEL_INFO, label, "%d operations ok", count);
      } else {
        log_message_katcl(k, KATCP_LEVEL_INFO, label, "did nothing successfully");
      }
    }
  }

  /* flush, allows us to get away with deferring writes to stdout */
  while(write_katcl(k) == 0);
  destroy_katcl(k, 0);

  return status;
}
Exemplo n.º 3
0
int perform_wops(struct wops_state *w, char *op)
{
  int delay;
  struct timeval delta, now;

  if((op == NULL) || (op[0] == '\0')){
    return WOPS_ERROR_PERMANENT;
  }

  if(op[0] == '-'){
    return WOPS_SKIP;
  }

  if(op[1] != ':'){
    return WOPS_ERROR_PERMANENT;
  }

  switch(op[0]){
    case 'p' : 
      puts(op + 2);
      return WOPS_OK;

    case 't' : /* set the timeout for commands */

      delay = atoi(op + 2);
      if(delay <= 0){
        return WOPS_ERROR_PERMANENT;
      }

#ifdef DEBUG
      fprintf(stderr, "t: setting new timeout in %ums\n", delay);
#endif

      set_timeout_wops(w, delay);

      return WOPS_OK;
    case 'd' : /* delay until timeout */

      gettimeofday(&now, NULL);

      if(cmp_time_katcp(&(w->w_when), &now) > 0){
        sub_time_katcp(&delta, &(w->w_when), &now);
#ifdef DEBUG
        fprintf(stderr, "d: waiting for %lu.%0lds\n", delta.tv_sec, delta.tv_usec);
#endif
        select(0, NULL, NULL, NULL, &delta);
#ifdef DEBUG
      } else {
        fprintf(stderr, "d: timeout already happened\n");
#endif
      }

      return WOPS_OK;
    case 'c' : /* check a value */
      return perform_check_wops(w, op);
    case 'w' : /* write a value */
      return perform_write_wops(w, op);
    default :
#ifdef DEBUG
      fprintf(stderr, "unknown operation %c\n", op[0]);
#endif
      break;
  }

  return WOPS_ERROR_PERMANENT;
}
Exemplo n.º 4
0
int main(int argc, char **argv)
{
  char *app, *server, *match, *parm, *tmp, *cmd, *extra, *label;
  int i, j, c, fd;
  int verbose, result, status, base, run, info, reply, display, max, prefix, timeout, fmt, pos, flags, munge, show, firm;
  struct katcl_line *l, *k;
  fd_set fsr, fsw;
  struct timeval tv, when, now;

  label = getenv("KATCP_LABEL");
  if(label == NULL){
    label = KCPCMD_NAME;
  }
  
  server = getenv("KATCP_SERVER");
  if(server == NULL){
    server = "localhost";
  }
  
  firm = 0;
  info = 1;
  reply = 1;
  verbose = 1;
  i = j = 1;
  app = argv[0];
  base = (-1);
  timeout = 5;
  fmt = FMT_TEXT;
  pos = (-1);
  k = NULL;
  munge = 0;
  show = 1;
  parm = NULL;

  while (i < argc) {
    if (argv[i][0] == '-') {
      c = argv[i][j];
      switch (c) {

        case 'h' :
          usage(app);
          return 0;
        case 'V' :
          
#ifdef VERSION
          printf("%s version %s\n", app, VERSION);
#else
          printf("%s version is unknown\n", app);
#endif
#ifdef __DATE__
          printf("%s compiled on %s\n", app, __DATE__);
#endif
#ifdef KATCP_PROTOCOL_MAJOR_VERSION
#ifdef KATCP_PROTOCOL_MINOR_VERSION
          printf("%s built for katcp %d.%d\n", app, KATCP_PROTOCOL_MAJOR_VERSION, KATCP_PROTOCOL_MINOR_VERSION);
#endif
#endif
          return 0;

        case 'v' : 
          verbose++;
          j++;
          break;
        case 'q' : 
          verbose = 0;
          info = 0;
          reply = 0;
          j++;
          break;
        case 'i' : 
          info = 1 - info;
          j++;
          break;
        case 'r' : 
          reply = 1 - reply;
          j++;
          break;
        case 'f' : 
          firm = 1 - firm;
          j++;
          break;
        case 'n' : 
          show = 0;
          j++;
          break;
        case 'k' : 
          k = create_katcl(STDOUT_FILENO);
          if(k == NULL){
            fprintf(stderr, "%s: unable to create katcp message logic\n", app);
            return 2;
          }
          j++;
          break;
        case 'a' :
          fmt = FMT_AUTO;
          j++;
          break;
        case 'x' :
          fmt = FMT_HEX;
          j++;
          break;
        case 'b' :
          fmt = FMT_BIN;
          j++;
          break;
        case 'm' :
          munge = 1;
          j++;
          break;

        case 'l' :
        case 's' :
        case 't' :
        case 'p' :

          j++;
          if (argv[i][j] == '\0') {
            j = 0;
            i++;
          }
          if (i >= argc) {
            fprintf(stderr, "%s: argument needs a parameter\n", app);
            return 2;
          }

          switch(c){
            case 'l' :
              label = argv[i] + j;
              break;
            case 's' :
              server = argv[i] + j;
              break;
            case 't' :
              timeout = atoi(argv[i] + j);
              break;
            case 'p' :
              pos = atoi(argv[i] + j);
              if(pos < 0){
                fprintf(stderr, "%s: position needs to be nonnegative, not %d\n", app, pos);
                return 2;
              }
              break;
          }

          i++;
          j = 1;
          break;

        case '-' :
          j++;
          break;
        case '\0':
          j = 1;
          i++;
          break;
        default:
          fprintf(stderr, "%s: unknown option -%c\n", app, argv[i][j]);
          return 2;
      }
    } else {
      base = i;
      i = argc;
    }
  }

  if(munge){
    if(k){
      reply = 1;
    }
  }

  if(base < 0){
    if(k){
      sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "no command given");
    }
    fprintf(stderr, "%s: need a command to send (use -h for help)\n", app);
    return 2;
  }

  status = 1;

  flags = 0;
  if(verbose > 0){
    flags = NETC_VERBOSE_ERRORS;
    if(verbose > 1){
      flags = NETC_VERBOSE_STATS;
    }
  }

  fd = net_connect(server, 0, flags);
  if(fd < 0){
    if(k){
      sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to connect to %s", server);
    }
    return 2;
  }

  l = create_katcl(fd);
  if(l == NULL){
    if(k){
      sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to create katcp parser");
    }
    fprintf(stderr, "%s: unable to create katcp parser\n", app);
    return 2;
  }

  i = base;
  match = NULL;
  flags = ((i + 1) < argc) ? KATCP_FLAG_FIRST : (KATCP_FLAG_FIRST | KATCP_FLAG_LAST);
  switch(argv[i][0]){
    case KATCP_REQUEST :
      match = argv[i] + 1;
      /* FALL */
    case KATCP_INFORM :
    case KATCP_REPLY  :
      append_string_katcl(l, flags, argv[i]);
    break;
    default :
      match = argv[i];
      append_args_katcl(l, flags, "%c%s", KATCP_REQUEST, argv[i]);
    break;
  }
  i++;
  while(i < argc){
    tmp = argv[i];
    i++;
    flags = (i < argc) ? 0 : KATCP_FLAG_LAST;
    if(load_arg(l, tmp, fmt, flags) < 0){
      if(k){
        sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to load argument %d", i);
      }
      fprintf(stderr, "%s: unable to load argument %d\n", app, i);
      return 2;
    }
  }

  if(match){
    for(prefix = 0; (match[prefix] != '\0') && (match[prefix] != ' '); prefix++);
#ifdef DEBUG
    fprintf(stderr, "debug: checking prefix %d of %s\n", prefix, match);
#endif
  } else {
    prefix = 0; /* pacify -Wall, prefix only used if match is set */
  }

  /* WARNING: logic a bit intricate */

  tv.tv_sec  = timeout;
  tv.tv_usec = 0;

  if(firm){
    gettimeofday(&now, NULL);

    add_time_katcp(&when, &now, &tv);
  }

  for(run = 1; run;){

    FD_ZERO(&fsr);
    FD_ZERO(&fsw);

    if(match){ /* only look for data if we need it */
      FD_SET(fd, &fsr);
    }

    if(flushing_katcl(l)){ /* only write data if we have some */
      FD_SET(fd, &fsw);
    }

    if(k){
      if(flushing_katcl(k)){ /* only write data if we have some */
        FD_SET(STDOUT_FILENO, &fsw);
      }
    }

    result = select(fd + 1, &fsr, &fsw, NULL, &tv);
    switch(result){
      case -1 :
        switch(errno){
          case EAGAIN :
          case EINTR  :
            continue; /* WARNING */
          default  :
            if(k){
              sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "select failed: %s", strerror(errno));
            }
            return 2;
        }
        break;
      case  0 :
        if(k){
          sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "request %s timed out after %d seconds", argv[base], timeout);
        } 
        if(verbose){
          fprintf(stderr, "%s: no %s within %d seconds\n", app, firm ? "response" : "io activity", timeout);
        }
        /* could terminate cleanly here, but ... */
        return 2;
    }

    if(firm){
      gettimeofday(&now, NULL);
      
      sub_time_katcp(&tv, &when, &now);
    } else{
      tv.tv_sec  = timeout;
      tv.tv_usec = 0;
    }

    if(FD_ISSET(fd, &fsw)){
      result = write_katcl(l);
      if(result < 0){
        if(k){
          sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "write failed: %s", strerror(errno));
        } 
        fprintf(stderr, "%s: write failed: %s\n", app, strerror(error_katcl(l)));
      	return 2;
      }
      if((result > 0) && (match == NULL)){ /* if we finished writing and don't expect a match then quit */
      	run = 0;
      }
    }

    if(k){
      if(FD_ISSET(STDOUT_FILENO, &fsw)){
        write_katcl(k);
      }
    }

    if(FD_ISSET(fd, &fsr)){
      result = read_katcl(l);
      if(result){
        if(k){
          sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "read failed: %s", (result < 0) ? strerror(error_katcl(l)) : "connection terminated");

        } 
        fprintf(stderr, "%s: read failed: %s\n", app, (result < 0) ? strerror(error_katcl(l)) : "connection terminated");
      	return 2;
      }
    }

    while(have_katcl(l) > 0){
      cmd = arg_string_katcl(l, 0);
      if(cmd){
        display = 0;
      	switch(cmd[0]){
          case KATCP_INFORM : 
            display = info;
            if(show == 0){
              if(!strcmp(KATCP_VERSION_CONNECT_INFORM, cmd)){
                display = 0;
              }
              if(!strcmp(KATCP_VERSION_INFORM, cmd)){
                display = 0;
              }
              if(!strcmp(KATCP_BUILD_STATE_INFORM, cmd)){
                display = 0;
              }
            }

            break;
          case KATCP_REPLY : 
            display = reply;
            parm = arg_string_katcl(l, 1);
            if(match){
              if(strncmp(match, cmd + 1, prefix) || ((cmd[prefix + 1] != '\0') && (cmd[prefix + 1] != ' '))){
                if(k){
                  sync_message_katcl(k, KATCP_LEVEL_WARN, label, "encountered unexpected reply %s", cmd);
                } 
                fprintf(stderr, "%s: warning: encountered unexpected reply <%s>\n", app, cmd);
              } else {
              	if(parm && !strcmp(parm, KATCP_OK)){
              	  status = 0;
                }
              	run = 0;
              }
            }
            break;
          case KATCP_REQUEST : 
            if(k){
              sync_message_katcl(k, KATCP_LEVEL_WARN, label, "encountered unanswerable request %s", cmd);
            } 
            fprintf(stderr, "%s: warning: encountered an unanswerable request <%s>\n", app, cmd);
            break;
          default :
            if(k){
              sync_message_katcl(k, KATCP_LEVEL_WARN, label, "read malformed message %s", cmd);
            } 
            fprintf(stderr, "%s: read malformed message <%s>\n", app, cmd);
            break;
        }
        if(display){
#ifdef DEBUG
          fprintf(stderr, "need to display\n");
#endif
          if(k){
            if(munge && parm && (cmd[0] == KATCP_REPLY)){
              if(!strcmp(parm, KATCP_OK)){
                sync_message_katcl(k, KATCP_LEVEL_DEBUG, cmd + 1, KATCP_OK);
              } else {
                extra = arg_string_katcl(l, 2);
                sync_message_katcl(k, KATCP_LEVEL_WARN, cmd + 1, "%s (%s)", parm, extra ? extra : "no extra information");
              } 
            } else {
              relay_katcl(l, k);
            }
          } else {
            max = arg_count_katcl(l);
            if(pos < 0){
              for(i = 0; i < max; i++){
                if(print_arg(l, i, fmt) < 0){
                  fprintf(stderr, "%s: failed to print argument %d\n", app, i);
                  return 2;
                }
                fputc(((i + 1) == max) ? '\n' : ' ' , stdout);
              }
            } else {
              if(pos < max){
                i = pos;
                if(print_arg(l, i, fmt) < 0){
                  fprintf(stderr, "%s: failed to print argument %d\n", app, i);
                  return 2;
                }
              }
            }
          }
        }
      }
    }
  }

  destroy_katcl(l, 1);
  if(k){
    while(write_katcl(k) == 0);

    destroy_katcl(k, 0);
  }

  return status;
}