wbadmin.c

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/*
 * An example 730-C-RPC White Board Administration program
 *
 * compile with:  gcc wbadmin.c -std=c99  -o wbadmin
 */

#include "wb.h"

/* The declarations for BClient, BBoard, XferWBArg, query, newserver,
 * and transferwhiteboard should go into the new server.x */

struct BClient {        /* cf with AClient */
  struct BClient *next;
  ClientData * clientdata;
                /* CLIENT *callback; removed */
};

struct BBoard {         /* cf with ABoard */
  struct BBoard *next;
  struct BClient *clients;
  ALine *lines;
};

#define NMSZ 50

struct XferWBArg {
  char boardnm[NMSZ];       /* board name to be transferred */
  char machinenm[NMSZ];     /* name of the receiving machine */
  int nprogram;         /* rpc prog num of the server above */
  int nversion;         /* registered version number */
};

struct BBoard * query_1(int * unused, CLIENT * clp) {  return 0;}
int newserver_1(char * machineName, CLIENT * clp) { return 0; }
int transferwhiteboard_1(struct XferWBArg a, CLIENT * clp) { return 0; }

void usage()
{
  fprintf
    (stderr,
     "\nNote: Linked with dummy query, newserver, transferwhiteboard functions.\n\n"
     "Usage: -q for query, -n for new server create, -t for transfer board\n"
     "wbadmin -q <server-machine-nm> <prognum-in-hex>\n"
     "wbadmin -n <existing-server-machine-nm> <prognum-in-hex> <new-server-machine-nm>\n"
     "wbadmin -t <from-server-machine-nm> <prognum-in-hex> <wb-nm> <to-server-machine-nm> <prognum>\n");
}

int queryServer(char * snm, int prgn, CLIENT * clp)
{
  int dummy = 0;
  struct BBoard * b = query_1(&dummy, clp);
  if (b == 0)
    printf("Server has no boards.\n");
  else
    for (; b; b = b->next) {
      printf("Board %s on server %s prognum %x has\n",
         b->clients->clientdata->boardnm, snm, prgn);
      if (b->clients == 0)  /* for robustness and better functionality ... */
    printf("\tno clients\n");
      else
    for (struct BClient * c = b->clients; c; c = c->next)
      printf("\tclient on server %s displayed at %s with prognum %x\n",
         c->clientdata->machinenm,
         c->clientdata->xdisplaynm,
         c->clientdata->nprogram);
    }
  return 0;
}

int main(int argc, char * argv[])
{
  CLIENT * clp = 0;
  int  result = -1;
    
  if (argc < 4)
    goto error;
  char * cmd = argv[1];
  if (cmd[0] != '-')
    goto error;

  char * host = argv[2];
  int prognum = strtol(argv[3], 0, 16);
  printf("prgn %x\n", prognum);
  clp = clnt_create(host, prognum, WhiteBoardServerVersion, "tcp");
  if (clp == 0)
    goto error;

  switch (cmd[1]) {
  case 'q':
    result = queryServer(host, prognum, clp);
    break;
  case 'n':
    if (argc < 5)
      goto error;
    result = newserver_1(argv[4], clp); /* result == prog num of new server */
    break;
  case 't':
    if (argc < 6)
      goto error;
    struct XferWBArg xa;
    strcpy(xa.boardnm, argv[4]);
    strcpy(xa.machinenm, argv[5]);
    xa.nprogram = strtol(argv[6], 0, 16);
    xa.nversion = WhiteBoardServerVersion;
    result = transferwhiteboard_1(xa, clp);
    break;
  default:
    goto error;
  }
done:
  if (clp)
    clnt_destroy(clp);
  printf("result %d\n", result);
  return result;

error:              /* more elaborate error reporting is better */
    usage();
    goto done;
}

/* -eof- */