client/client.c

   1 /*
   2  * Copyright (c) 1995, Index Data.
   3  * See the file LICENSE for details.
   4  * Sebastian Hammer, Adam Dickmeiss
   5  *
   6  * $Log: client.c,v $
   7  * Revision 1.12  1995-06-15 07:44:57  quinn
   8  * Moving to v3.
   9  *
  10  * Revision 1.11  1995/06/14  15:26:40  quinn
  11  * *** empty log message ***
  12  *
  13  * Revision 1.10  1995/06/06  14:56:58  quinn
  14  * Better diagnostics.
  15  *
  16  * Revision 1.9  1995/06/06  08:15:19  quinn
  17  * Cosmetic.
  18  *
  19  * Revision 1.8  1995/06/05  10:52:22  quinn
  20  * Added SCAN.
  21  *
  22  * Revision 1.7  1995/06/02  09:50:09  quinn
  23  * Smallish.
  24  *
  25  * Revision 1.6  1995/05/31  08:29:21  quinn
  26  * Nothing significant.
  27  *
  28  * Revision 1.5  1995/05/29  08:10:47  quinn
  29  * Moved oid.c to util.
  30  *
  31  * Revision 1.4  1995/05/22  15:30:13  adam
  32  * Client uses prefix query notation.
  33  *
  34  * Revision 1.3  1995/05/22  15:06:53  quinn
  35  * *** empty log message ***
  36  *
  37  * Revision 1.2  1995/05/22  14:56:40  quinn
  38  * *** empty log message ***
  39  *
  40  * Revision 1.1  1995/05/22  11:30:31  quinn
  41  * Added prettier client.
  42  *
  43  *
  44  */
  45
  46 /*
  47  * This is the obligatory little toy client, whose primary purpose is
  48  * to illustrate the use of the YAZ service-level API.
  49  */
  50
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <sys/time.h>
  54 #include <assert.h>
  55 #ifdef _AIX
  56 #include <sys/select.h>
  57 #endif
  58
  59 #include <comstack.h>
  60 #include <tcpip.h>
  61 #ifdef USE_XTIMOSI
  62 #include <xmosi.h>
  63 #endif
  64
  65 #include <proto.h>
  66
  67 #include <marcdisp.h>
  68
  69 #ifdef RPN_QUERY
  70 #ifdef PREFIX_QUERY
  71 #include <pquery.h>
  72 #else
  73 #include <yaz-ccl.h>
  74 #endif
  75 #endif
  76
  77 #define C_PROMPT "Z> "
  78
  79 static ODR out, in, print;              /* encoding and decoding streams */
  80 static COMSTACK conn = 0;               /* our z-association */
  81 static Z_IdAuthentication *auth = 0;    /* our current auth definition */
  82 static char database[512] = "Default";  /* Database name */
  83 static int setnumber = 0;               /* current result set number */
  84 static int smallSetUpperBound = 0;
  85 static int largeSetLowerBound = 1;
  86 static int mediumSetPresentNumber = 0;
  87 static int setno = 1;                   /* current set offset */
  88 static int protocol = PROTO_Z3950;      /* current app protocol */
  89 static ODR_MEM session_mem;                /* memory handle for init-response */
  90 static Z_InitResponse *session = 0;        /* session parameters */
  91 static char last_scan[512] = "0";
  92 static char last_cmd[100] = "?";
  93 #ifdef RPN_QUERY
  94 #ifndef PREFIX_QUERY
  95 static CCL_bibset bibset;               /* CCL bibset handle */
  96 #endif
  97 #endif
  98
  99 static void send_apdu(Z_APDU *a)
 100 {
 101     char *buf;
 102     int len;
 103
 104     if (!z_APDU(out, &a, 0))
 105     {
 106         odr_perror(out, "Encoding APDU");
 107         exit(1);
 108     }
 109     buf = odr_getbuf(out, &len, 0);
 110     odr_reset(out); /* release the APDU */
 111     if (cs_put(conn, buf, len) < 0)
 112     {
 113         fprintf(stderr, "cs_put: %s", cs_errlist[cs_errno(conn)]);
 114         exit(1);
 115     }
 116 }
 117
 118 /* INIT SERVICE ------------------------------- */
 119
 120 static void send_initRequest()
 121 {
 122     Z_APDU *apdu = zget_APDU(out, Z_APDU_initRequest);
 123     Z_InitRequest *req = apdu->u.initRequest;
 124
 125     ODR_MASK_SET(req->options, Z_Options_search);
 126     ODR_MASK_SET(req->options, Z_Options_present);
 127     ODR_MASK_SET(req->options, Z_Options_namedResultSets);
 128     ODR_MASK_SET(req->options, Z_Options_triggerResourceCtrl);
 129     ODR_MASK_SET(req->options, Z_Options_scan);
 130
 131     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
 132     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
 133
 134     req->idAuthentication = auth;
 135
 136     send_apdu(apdu);
 137     printf("Sent initrequest.\n");
 138 }
 139
 140 static int process_initResponse(Z_InitResponse *res)
 141 {
 142     /* save session parameters for later use */
 143     session_mem = odr_extract_mem(in);
 144     session = res;
 145
 146     if (!*res->result)
 147         printf("Connection rejected by target.\n");
 148     else
 149         printf("Connection accepted by target.\n");
 150     if (res->implementationId)
 151         printf("ID     : %s\n", res->implementationId);
 152     if (res->implementationName)
 153         printf("Name   : %s\n", res->implementationName);
 154     if (res->implementationVersion)
 155         printf("Version: %s\n", res->implementationVersion);
 156     if (res->userInformationField)
 157     {
 158         printf("UserInformationfield:\n");
 159         if (!odr_external(print, (Odr_external**)&res-> userInformationField,
 160             0))
 161         {
 162             odr_perror(print, "Printing userinfo\n");
 163             odr_reset(print);
 164         }
 165         if (res->userInformationField->which == ODR_EXTERNAL_octet)
 166         {
 167             printf("Guessing visiblestring:\n");
 168             printf("'%s'\n", res->userInformationField->u. octet_aligned->buf);
 169         }
 170     }
 171     return 0;
 172 }
 173
 174 int cmd_open(char *arg)
 175 {
 176     void *add;
 177     char type[100], addr[100];
 178     CS_TYPE t;
 179
 180     if (conn)
 181     {
 182         printf("Already connected.\n");
 183         return 0;
 184     }
 185     if (!*arg || sscanf(arg, "%[^:]:%s", type, addr) < 2)
 186     {
 187         fprintf(stderr, "Usage: open (osi|tcp) ':' [tsel '/']host[':'port]\n");
 188         return 0;
 189     }
 190 #ifdef USE_XTIMOSI
 191     if (!strcmp(type, "osi"))
 192     {
 193         if (!(add = mosi_strtoaddr(addr)))
 194         {
 195             perror(arg);
 196             return 0;
 197         }
 198         t = mosi_type;
 199         protocol = PROTO_SR;
 200     }
 201     else
 202 #endif
 203     if (!strcmp(type, "tcp"))
 204     {
 205         if (!(add = tcpip_strtoaddr(addr)))
 206         {
 207             perror(arg);
 208             return 0;
 209         }
 210         t = tcpip_type;
 211         protocol = PROTO_Z3950;
 212     }
 213     else
 214     {
 215         fprintf(stderr, "Bad type: %s\n", type);
 216         return 0;
 217     }
 218     if (!(conn = cs_create(t, 1, protocol)))
 219     {
 220         perror("cs_create");
 221         return 0;
 222     }
 223     printf("Connecting...");
 224     fflush(stdout);
 225     if (cs_connect(conn, add) < 0)
 226     {
 227         perror("connect");
 228         cs_close(conn);
 229         conn = 0;
 230         return 0;
 231     }
 232     printf("Ok.\n");
 233     send_initRequest();
 234     return 2;
 235 }
 236
 237 int cmd_authentication(char *arg)
 238 {
 239     static Z_IdAuthentication au;
 240     static char open[256];
 241
 242     if (!*arg)
 243     {
 244         printf("Auth field set to null\n");
 245         auth = 0;
 246         return 1;
 247     }
 248     auth = &au;
 249     au.which = Z_IdAuthentication_open;
 250     au.u.open = open;
 251     strcpy(open, arg);
 252     return 1;
 253 }
 254
 255 /* SEARCH SERVICE ------------------------------ */
 256
 257 void display_record(Z_DatabaseRecord *p)
 258 {
 259     Odr_external *r = (Odr_external*) p;
 260
 261     if (r->direct_reference)
 262     {
 263         oident *ent = oid_getentbyoid(r->direct_reference);
 264
 265         printf("Record type: ");
 266         if (ent)
 267             printf("%s\n", ent->desc);
 268         else if (!odr_oid(print, &r->direct_reference, 0))
 269         {
 270             odr_perror(print, "print oid");
 271             odr_reset(print);
 272         }
 273     }
 274 #if 1
 275     if (r->which == ODR_EXTERNAL_octet && p->u.octet_aligned->len)
 276     {
 277 #if 1
 278         marc_display ((char*)p->u.octet_aligned->buf, stdout);
 279 #else
 280         FILE *ofi = fopen("dump", "a");
 281         assert(ofi);
 282         fwrite(p->u.octet_aligned->buf, 1, p->u.octet_aligned->len, ofi);
 283         fclose(ofi);
 284         printf("dumped record\n");
 285 #endif
 286     }
 287     else
 288     {
 289         printf("Unknown record representation.\n");
 290         if (!odr_external(print, &r, 0))
 291         {
 292             odr_perror(print, "Printing external");
 293             odr_reset(print);
 294         }
 295     }
 296 #endif
 297 }
 298
 299 static void display_diagrec(Z_DiagRec *p)
 300 {
 301     oident *ent;
 302 #ifdef Z_95
 303     Z_DefaultDiagFormat *r;
 304 #else
 305     Z_DiagRec *r = p;
 306 #endif
 307
 308     printf("Diagnostic message from database.\n");
 309 #ifdef Z_95
 310     if (p->which != Z_DiagRec_defaultFormat)
 311     {
 312         printf("Diagnostic record not in default format.\n");
 313         return;
 314     }
 315     else
 316         r = p->u.defaultFormat;
 317 #endif
 318     if (!(ent = oid_getentbyoid(r->diagnosticSetId)) ||
 319         ent->class != CLASS_DIAGSET || ent->value != VAL_BIB1)
 320         printf("Missing or unknown diagset\n");
 321     printf("Error condition: %d", *r->condition);
 322     printf(" -- %s\n", r->addinfo ? r->addinfo : "");
 323 }
 324
 325 static void display_nameplusrecord(Z_NamePlusRecord *p)
 326 {
 327     if (p->databaseName)
 328         printf("[%s]", p->databaseName);
 329     if (p->which == Z_NamePlusRecord_surrogateDiagnostic)
 330         display_diagrec(p->u.surrogateDiagnostic);
 331     else
 332         display_record(p->u.databaseRecord);
 333 }
 334
 335 static void display_records(Z_Records *p)
 336 {
 337     int i;
 338
 339     if (p->which == Z_Records_NSD)
 340         display_diagrec(p->u.nonSurrogateDiagnostic);
 341     else
 342     {
 343         printf("Records: %d\n", p->u.databaseOrSurDiagnostics->num_records);
 344         for (i = 0; i < p->u.databaseOrSurDiagnostics->num_records; i++)
 345             display_nameplusrecord(p->u.databaseOrSurDiagnostics->records[i]);
 346     }
 347 }
 348
 349 static int send_searchRequest(char *arg)
 350 {
 351     Z_APDU *apdu = zget_APDU(out, Z_APDU_searchRequest);
 352     Z_SearchRequest *req = apdu->u.searchRequest;
 353     char *databaseNames = database;
 354     Z_Query query;
 355 #ifdef RPN_QUERY
 356 #ifndef PREFIX_QUERY
 357     struct ccl_rpn_node *rpn;
 358     int error, pos;
 359 #endif
 360 #endif
 361     char setstring[100];
 362 #ifdef RPN_QUERY
 363     Z_RPNQuery *RPNquery;
 364     oident bib1;
 365 #else
 366     Odr_oct ccl_query;
 367 #endif
 368
 369 #ifdef RPN_QUERY
 370 #ifndef PREFIX_QUERY
 371     rpn = ccl_find_str(bibset, arg, &error, &pos);
 372     if (error)
 373     {
 374         printf("CCL ERROR: %s\n", ccl_err_msg(error));
 375         return 0;
 376     }
 377 #endif
 378 #endif
 379
 380     if (!strcmp(arg, "@big")) /* strictly for troublemaking */
 381     {
 382         static unsigned char big[2100];
 383         static Odr_oct bigo;
 384
 385         /* send a very big referenceid to test transport stack etc. */
 386         memset(big, 'A', 2100);
 387         bigo.len = bigo.size = 2100;
 388         bigo.buf = big;
 389         req->referenceId = &bigo;
 390     }
 391
 392     if (setnumber >= 0)
 393     {
 394         sprintf(setstring, "%d", ++setnumber);
 395         req->resultSetName = setstring;
 396     }
 397     *req->smallSetUpperBound = smallSetUpperBound;
 398     *req->largeSetLowerBound = largeSetLowerBound;
 399     *req->mediumSetPresentNumber = mediumSetPresentNumber;
 400     req->num_databaseNames = 1;
 401     req->databaseNames = &databaseNames;
 402
 403     req->query = &query;
 404
 405 #ifdef RPN_QUERY
 406     query.which = Z_Query_type_1;
 407
 408 #ifndef PREFIX_QUERY
 409     assert((RPNquery = ccl_rpn_query(rpn)));
 410 #else
 411     RPNquery = p_query_rpn (out, arg);
 412     if (!RPNquery)
 413     {
 414         printf("Prefix query error\n");
 415         return 0;
 416     }
 417 #endif
 418     bib1.proto = protocol;
 419     bib1.class = CLASS_ATTSET;
 420     bib1.value = VAL_BIB1;
 421     RPNquery->attributeSetId = oid_getoidbyent(&bib1);
 422     query.u.type_1 = RPNquery;
 423 #else
 424     query.which = Z_Query_type_2;
 425     query.u.type_2 = &ccl_query;
 426     ccl_query.buf = (unsigned char*) arg;
 427     ccl_query.len = strlen(arg);
 428 #endif
 429
 430     send_apdu(apdu);
 431     setno = 1;
 432     printf("Sent searchRequest.\n");
 433     return 2;
 434 }
 435
 436 static int process_searchResponse(Z_SearchResponse *res)
 437 {
 438     if (*res->searchStatus)
 439         printf("Search was a success.\n");
 440     else
 441         printf("Search was a bloomin' failure.\n");
 442     printf("Number of hits: %d, setno %d\n",
 443         *res->resultCount, setnumber);
 444     printf("records returned: %d\n",
 445         *res->numberOfRecordsReturned);
 446     setno += *res->numberOfRecordsReturned;
 447     if (res->records)
 448         display_records(res->records);
 449     return 0;
 450 }
 451
 452 static int cmd_find(char *arg)
 453 {
 454     if (!*arg)
 455     {
 456         printf("Find what?\n");
 457         return 0;
 458     }
 459     if (!conn)
 460     {
 461         printf("Not connected yet\n");
 462         return 0;
 463     }
 464     if (!send_searchRequest(arg))
 465         return 0;
 466     return 2;
 467 }
 468
 469 static int cmd_ssub(char *arg)
 470 {
 471     if (!(smallSetUpperBound = atoi(arg)))
 472         return 0;
 473     return 1;
 474 }
 475
 476 static int cmd_lslb(char *arg)
 477 {
 478     if (!(largeSetLowerBound = atoi(arg)))
 479         return 0;
 480     return 1;
 481 }
 482
 483 static int cmd_mspn(char *arg)
 484 {
 485     if (!(mediumSetPresentNumber = atoi(arg)))
 486         return 0;
 487     return 1;
 488 }
 489
 490 static int cmd_status(char *arg)
 491 {
 492     printf("smallSetUpperBound: %d\n", smallSetUpperBound);
 493     printf("largeSetLowerBound: %d\n", largeSetLowerBound);
 494     printf("mediumSetPresentNumber: %d\n", mediumSetPresentNumber);
 495     return 1;
 496 }
 497
 498 static int cmd_base(char *arg)
 499 {
 500     if (!*arg)
 501     {
 502         printf("Usage: base <database>\n");
 503         return 0;
 504     }
 505     strcpy(database, arg);
 506     return 1;
 507 }
 508
 509 static int cmd_setnames(char *arg)
 510 {
 511     if (setnumber < 0)
 512     {
 513         printf("Set numbering enabled.\n");
 514         setnumber = 0;
 515     }
 516     else
 517     {
 518         printf("Set numbering disabled.\n");
 519         setnumber = -1;
 520     }
 521     return 1;
 522 }
 523
 524 /* PRESENT SERVICE ----------------------------- */
 525
 526 static int send_presentRequest(char *arg)
 527 {
 528     Z_APDU *apdu = zget_APDU(out, Z_APDU_presentRequest);
 529     Z_PresentRequest *req = apdu->u.presentRequest;
 530     int nos = 1;
 531     char *p;
 532     char setstring[100];
 533
 534     if ((p = strchr(arg, '+')))
 535     {
 536         nos = atoi(p + 1);
 537         *p = 0;
 538     }
 539     if (*arg)
 540         setno = atoi(arg);
 541
 542     if (setnumber >= 0)
 543     {
 544         sprintf(setstring, "%d", setnumber);
 545         req->resultSetId = setstring;
 546     }
 547     req->resultSetStartPoint = &setno;
 548     req->numberOfRecordsRequested = &nos;
 549     send_apdu(apdu);
 550     printf("Sent presentRequest (%d+%d).\n", setno, nos);
 551     return 2;
 552 }
 553
 554 static int cmd_show(char *arg)
 555 {
 556     if (!send_presentRequest(arg))
 557         return 0;
 558     return 2;
 559 }
 560
 561 int cmd_quit(char *arg)
 562 {
 563     printf("See you later, alligator.\n");
 564     exit(0);
 565 }
 566
 567 int cmd_cancel(char *arg)
 568 {
 569     Z_APDU *apdu = zget_APDU(out, Z_APDU_triggerResourceControlRequest);
 570     Z_TriggerResourceControlRequest *req =
 571         apdu->u.triggerResourceControlRequest;
 572     bool_t false = 0;
 573
 574     if (!session)
 575     {
 576         printf("Session not initialized yet\n");
 577         return 0;
 578     }
 579     if (!ODR_MASK_GET(session->options, Z_Options_triggerResourceCtrl))
 580     {
 581         printf("Target doesn't support cancel (trigger resource ctrl)\n");
 582         return 0;
 583     }
 584     *req->requestedAction = Z_TriggerResourceCtrl_cancel;
 585     req->resultSetWanted = &false;
 586
 587     send_apdu(apdu);
 588     printf("Sent cancel request\n");
 589     return 2;
 590 }
 591
 592 int send_scanrequest(char *string, int pp, int num)
 593 {
 594     Z_APDU *apdu = zget_APDU(out, Z_APDU_scanRequest);
 595     Z_ScanRequest *req = apdu->u.scanRequest;
 596     char *db = database;
 597     oident attset;
 598
 599     req->num_databaseNames = 1;
 600     req->databaseNames = &db;
 601     attset.proto = protocol;
 602     attset.class = CLASS_ATTSET;
 603     attset.value = VAL_BIB1;
 604     req->attributeSet = oid_getoidbyent(&attset);
 605     req->termListAndStartPoint = p_query_scan(out, string);
 606     req->numberOfTermsRequested = &num;
 607     req->preferredPositionInResponse = &pp;
 608     send_apdu(apdu);
 609     return 2;
 610 }
 611
 612 void display_term(Z_TermInfo *t)
 613 {
 614     if (t->term->which == Z_Term_general)
 615     {
 616         printf("%.*s (%d)\n", t->term->u.general->len, t->term->u.general->buf,
 617             t->globalOccurrences ? *t->globalOccurrences : -1);
 618         sprintf(last_scan, "%.*s", t->term->u.general->len,
 619             t->term->u.general->buf);
 620     }
 621     else
 622         printf("Term type not general.\n");
 623 }
 624
 625 void process_scanResponse(Z_ScanResponse *res)
 626 {
 627     int i;
 628
 629     printf("SCAN: %d entries, position=%d\n", *res->numberOfEntriesReturned,
 630         *res->positionOfTerm);
 631     if (*res->scanStatus != Z_Scan_success)
 632         printf("Scan returned code %d\n", *res->scanStatus);
 633     if (!res->entries)
 634         return;
 635     if (res->entries->which == Z_ListEntries_entries)
 636     {
 637         Z_Entries *ent = res->entries->u.entries;
 638
 639         for (i = 0; i < ent->num_entries; i++)
 640             if (ent->entries[i]->which == Z_Entry_termInfo)
 641             {
 642                 printf("%c ", i + 1 == *res->positionOfTerm ? '*' : ' ');
 643                 display_term(ent->entries[i]->u.termInfo);
 644             }
 645             else
 646                 display_diagrec(ent->entries[i]->u.surrogateDiagnostic);
 647     }
 648     else
 649         display_diagrec(res->entries->u.nonSurrogateDiagnostics->diagRecs[0]);
 650 }
 651
 652 int cmd_scan(char *arg)
 653 {
 654     if (!session)
 655     {
 656         printf("Session not initialized yet\n");
 657         return 0;
 658     }
 659     if (!ODR_MASK_GET(session->options, Z_Options_scan))
 660     {
 661         printf("Target doesn't support scan\n");
 662         return 0;
 663     }
 664     if (*arg)
 665     {
 666         if (send_scanrequest(arg, 5, 20) < 0)
 667             return 0;
 668     }
 669     else
 670         if (send_scanrequest(last_scan, 1, 20) < 0)
 671             return 0;
 672     return 2;
 673 }
 674
 675 static void initialize(void)
 676 {
 677 #ifdef RPN_QUERY
 678 #ifndef PREFIX_QUERY
 679     FILE *inf;
 680 #endif
 681 #endif
 682
 683     if (!(out = odr_createmem(ODR_ENCODE)) ||
 684         !(in = odr_createmem(ODR_DECODE)) ||
 685         !(print = odr_createmem(ODR_PRINT)))
 686     {
 687         fprintf(stderr, "failed to allocate ODR streams\n");
 688         exit(1);
 689     }
 690     setvbuf(stdout, 0, _IONBF, 0);
 691
 692 #ifdef RPN_QUERY
 693 #ifndef PREFIX_QUERY
 694     bibset = ccl_qual_mk ();
 695     inf = fopen ("default.bib", "r");
 696     if (inf)
 697     {
 698         ccl_qual_file (bibset, inf);
 699         fclose (inf);
 700     }
 701 #endif
 702 #endif
 703 }
 704
 705 static int client(void)
 706 {
 707     static struct {
 708         char *cmd;
 709         int (*fun)(char *arg);
 710         char *ad;
 711     } cmd[] = {
 712         {"open", cmd_open, "('tcp'|'osi')':'[<TSEL>'/']<HOST>[':'<PORT>]"},
 713         {"quit", cmd_quit, ""},
 714         {"find", cmd_find, "<CCL-QUERY>"},
 715         {"base", cmd_base, "<BASE-NAME>"},
 716         {"show", cmd_show, "<REC#>['+'<#RECS>]"},
 717         {"scan", cmd_scan, "<TERM>"},
 718         {"authentication", cmd_authentication, "<ACCTSTRING>"},
 719         {"lslb", cmd_lslb, "<largeSetLowerBound>"},
 720         {"ssub", cmd_ssub, "<smallSetUpperBound>"},
 721         {"mspn", cmd_mspn, "<mediumSetPresentNumber>"},
 722         {"status", cmd_status, ""},
 723         {"setnames", cmd_setnames, ""},
 724         {"cancel", cmd_cancel, ""},
 725         {0,0}
 726     };
 727     char *netbuffer= 0;
 728     int netbufferlen = 0;
 729     int i;
 730     Z_APDU *apdu;
 731
 732     while (1)
 733     {
 734         int res;
 735         fd_set input;
 736         char line[1024], word[1024], arg[1024];
 737
 738         FD_ZERO(&input);
 739         FD_SET(0, &input);
 740         if (conn)
 741             FD_SET(cs_fileno(conn), &input);
 742         if ((res = select(20, &input, 0, 0, 0)) < 0)
 743         {
 744             perror("select");
 745             exit(1);
 746         }
 747         if (!res)
 748             continue;
 749         if (FD_ISSET(0, &input))
 750         {
 751             /* quick & dirty way to get a command line. */
 752             if (!gets(line))
 753                 break;
 754             if ((res = sscanf(line, "%s %[^;]", word, arg)) <= 0)
 755             {
 756                 strcpy(word, last_cmd);
 757                 *arg = '\0';
 758             }
 759             else if (res == 1)
 760                 *arg = 0;
 761             strcpy(last_cmd, word);
 762             for (i = 0; cmd[i].cmd; i++)
 763                 if (!strncmp(cmd[i].cmd, word, strlen(word)))
 764                 {
 765                     res = (*cmd[i].fun)(arg);
 766                     break;
 767                 }
 768             if (!cmd[i].cmd) /* dump our help-screen */
 769             {
 770                 printf("Unknown command: %s.\n", word);
 771                 printf("Currently recognized commands:\n");
 772                 for (i = 0; cmd[i].cmd; i++)
 773                     printf("   %s %s\n", cmd[i].cmd, cmd[i].ad);
 774                 res = 1;
 775             }
 776             if (res < 2)
 777                 printf(C_PROMPT);
 778         }
 779         if (conn && FD_ISSET(cs_fileno(conn), &input))
 780         {
 781             do
 782             {
 783                 if ((res = cs_get(conn, &netbuffer, &netbufferlen)) < 0)
 784                 {
 785                     perror("cs_get");
 786                     exit(1);
 787                 }
 788                 if (!res)
 789                 {
 790                     printf("Target closed connection.\n");
 791                     exit(1);
 792                 }
 793                 odr_reset(in); /* release APDU from last round */
 794                 odr_setbuf(in, netbuffer, res, 0);
 795                 if (!z_APDU(in, &apdu, 0))
 796                 {
 797                     odr_perror(in, "Decoding incoming APDU");
 798                     exit(1);
 799                 }
 800 #if 0
 801                 if (!z_APDU(print, &apdu, 0))
 802                 {
 803                     odr_perror(print, "Failed to print incoming APDU");
 804                     odr_reset(print);
 805                     continue;
 806                 }
 807 #endif
 808                 switch(apdu->which)
 809                 {
 810                     case Z_APDU_initResponse:
 811                         process_initResponse(apdu->u.initResponse);
 812                         break;
 813                     case Z_APDU_searchResponse:
 814                         process_searchResponse(apdu->u.searchResponse);
 815                         break;
 816                     case Z_APDU_scanResponse:
 817                         process_scanResponse(apdu->u.scanResponse);
 818                         break;
 819                     case Z_APDU_presentResponse:
 820                         printf("Received presentResponse.\n");
 821                         setno +=
 822                             *apdu->u.presentResponse->numberOfRecordsReturned;
 823                         if (apdu->u.presentResponse->records)
 824                             display_records(apdu->u.presentResponse->records);
 825                         else
 826                             printf("No records.\n");
 827                         break;
 828                     default:
 829                         printf("Received unknown APDU type (%d).\n",
 830                             apdu->which);
 831                         exit(1);
 832                 }
 833                 printf("Z> ");
 834                 fflush(stdout);
 835             }
 836             while (cs_more(conn));
 837         }
 838     }
 839     return 0;
 840 }
 841
 842 int main(int argc, char **argv)
 843 {
 844     initialize();
 845     if (argc > 1)
 846         cmd_open(argv[1]);
 847     else
 848         printf(C_PROMPT);
 849     return client();
 850 }