src/srfsh/srfsh.c

   1 #include "srfsh.h"
   2
   3 int main( int argc, char* argv[] ) {
   4
   5
   6
   7         /* --------------------------------------------- */
   8         if( argc < 2 ) {
   9
  10                 /* see if they have a .srfsh.xml in their home directory */
  11                 char* home = getenv("HOME");
  12                 int l = strlen(home) + 36;
  13                 char fbuf[l];
  14                 memset(fbuf, 0, l);
  15                 sprintf(fbuf,"%s/.srfsh.xml",home);
  16
  17                 if(!access(fbuf, R_OK)) {
  18                         if( ! osrf_system_bootstrap_client(fbuf) )
  19                                 fatal_handler( "Unable to bootstrap client for requests");
  20
  21                 } else {
  22                         fatal_handler( "No Config file found at %s and none specified. "
  23                                         "\nusage: %s <config_file>", fbuf, argv[0] );
  24                 }
  25
  26         } else {
  27                 if( ! osrf_system_bootstrap_client(argv[1]) )
  28                         fatal_handler( "Unable to bootstrap client for requests");
  29         }
  30         /* --------------------------------------------- */
  31         load_history();
  32
  33
  34         client = osrf_system_get_transport_client();
  35         osrf_message_set_json_parse(1);
  36
  37
  38         /* main process loop */
  39         char* request;
  40         while((request=readline(prompt))) {
  41
  42                 if( !strcmp(request, "exit") || !strcmp(request,"quit"))
  43                         break;
  44
  45                 char* req_copy = strdup(request);
  46
  47                 parse_request( req_copy );
  48                 if( request && strlen(request) > 1 ) {
  49                         add_history(request);
  50                 }
  51
  52                 free(request);
  53                 free(req_copy);
  54         }
  55
  56         if(history_file != NULL )
  57                 write_history(history_file);
  58         free(request);
  59         client_disconnect( client );
  60         client_free( client );
  61         config_reader_free();
  62         log_free();
  63
  64         return 0;
  65 }
  66
  67 void sig_child_handler( int s ) {
  68         child_dead = 1;
  69 }
  70
  71 /*
  72 void sig_int_handler( int s ) {
  73         printf("\n");
  74         caught_sigint = 1;
  75         signal(SIGINT,sig_int_handler);
  76 }
  77 */
  78
  79 int load_history() {
  80
  81         char* home = getenv("HOME");
  82         int l = strlen(home) + 24;
  83         char fbuf[l];
  84
  85         memset(fbuf, 0, l);
  86         sprintf(fbuf,"%s/.srfsh_history",home);
  87         history_file = strdup(fbuf);
  88
  89         if(!access(history_file, W_OK | R_OK )) {
  90                 //set_history_length(999);
  91                 history_length = 999;
  92                 read_history(history_file);
  93         }
  94         return 1;
  95 }
  96
  97
  98 int parse_error( char* words[] ) {
  99
 100         if( ! words )
 101                 return 0;
 102
 103         int i = 0;
 104         char* current;
 105         char buffer[256];
 106         memset(buffer, 0, 256);
 107         while( (current=words[i++]) ) {
 108                 strcat(buffer, current);
 109                 strcat(buffer, " ");
 110         }
 111         if( ! buffer || strlen(buffer) < 1 )
 112                 printf("\n");
 113
 114         fprintf( stderr, "???: %s\n", buffer );
 115         return 0;
 116
 117 }
 118
 119
 120 int parse_request( char* request ) {
 121
 122         if( request == NULL )
 123                 return 0;
 124
 125         int ret_val = 0;
 126         int i = 0;
 127         char* words[COMMAND_BUFSIZE];
 128         memset(words,0,COMMAND_BUFSIZE);
 129         char* req = request;
 130
 131         char* cur_tok = strtok( req, " " );
 132
 133         if( cur_tok == NULL )
 134                 return 0;
 135
 136         while(cur_tok != NULL) {
 137                 words[i++] = cur_tok;
 138                 cur_tok = strtok( NULL, " " );
 139         }
 140
 141
 142         // not sure why (strtok?), but this is necessary
 143         memset( words + i, 0, COMMAND_BUFSIZE - i );
 144
 145         /* pass off to the top level command */
 146         if( !strcmp(words[0],"router") )
 147                 ret_val = handle_router( words );
 148
 149         else if( !strcmp(words[0],"time") )
 150                 ret_val = handle_time( words );
 151
 152         else if (!strcmp(words[0],"request"))
 153                 ret_val = handle_request( words, 0 );
 154
 155         else if (!strcmp(words[0],"relay"))
 156                 ret_val = handle_request( words, 1 );
 157
 158         else if (!strcmp(words[0],"help"))
 159                 ret_val = print_help();
 160
 161         else if (!strcmp(words[0],"set"))
 162                 ret_val = handle_set(words);
 163
 164         else if (!strcmp(words[0],"print"))
 165                 ret_val = handle_print(words);
 166
 167         else if (!strcmp(words[0],"math_bench"))
 168                 ret_val = handle_math(words);
 169
 170         else if (!strcmp(words[0],"introspect"))
 171                 ret_val = handle_introspect(words);
 172
 173         else if (!strcmp(words[0],"login"))
 174                 ret_val = handle_login(words);
 175
 176         else if (words[0][0] == '!')
 177                 ret_val = handle_exec( words );
 178
 179         if(!ret_val)
 180                 return parse_error( words );
 181
 182         return 1;
 183
 184 }
 185
 186
 187 int handle_introspect(char* words[]) {
 188
 189         if(words[1]) {
 190                 fprintf(stderr, "--> %s\n", words[1]);
 191                 char buf[256];
 192                 memset(buf,0,256);
 193                 sprintf( buf, "request %s opensrf.system.method.all", words[1] );
 194                 return parse_request( buf );
 195         }
 196
 197         return 0;
 198 }
 199
 200
 201 int handle_login( char* words[]) {
 202
 203         if( words[1] && words[2]) {
 204
 205                 char* username = words[1];
 206                 char* password = words[2];
 207
 208                 char buf[256];
 209                 memset(buf,0,256);
 210
 211                 char buf2[256];
 212                 memset(buf2,0,256);
 213
 214                 sprintf( buf,
 215                                 "request open-ils.auth open-ils.auth.authenticate.init \"%s\"", username );
 216                 parse_request(buf);
 217
 218                 char* hash = json_object_get_string( last_result->result_content );
 219
 220                 char* pass_buf = md5sum(password);
 221
 222                 char both_buf[256];
 223                 memset(both_buf,0,256);
 224                 sprintf(both_buf,"%s%s",hash, pass_buf);
 225
 226                 char* mess_buf = md5sum(both_buf);
 227
 228                 sprintf( buf2,
 229                                 "request open-ils.auth open-ils.auth.authenticate.complete \"%s\", \"%s\"",
 230                                 username, mess_buf );
 231
 232                 free(pass_buf);
 233                 free(mess_buf);
 234
 235                 parse_request( buf2 );
 236
 237                 login_session = strdup(json_object_get_string( last_result->result_content ));
 238
 239                 printf("Login Session: %s\n", login_session );
 240
 241                 return 1;
 242
 243         }
 244
 245         return 0;
 246 }
 247
 248 char* md5sum( char* text ) {
 249
 250         struct md5_ctx ctx;
 251         unsigned char digest[16];
 252
 253         MD5_start (&ctx);
 254
 255         int i;
 256         for ( i=0 ; i != strlen(text) ; i++ )
 257                 MD5_feed (&ctx, text[i]);
 258
 259         MD5_stop (&ctx, digest);
 260
 261         char buf[16];
 262         memset(buf,0,16);
 263
 264         char final[256];
 265         memset(final,0,256);
 266
 267         for ( i=0 ; i<16 ; i++ ) {
 268                 sprintf(buf, "%02x", digest[i]);
 269                 strcat( final, buf );
 270         }
 271
 272         return strdup(final);
 273
 274 }
 275
 276
 277 int handle_set( char* words[]) {
 278
 279         char* variable;
 280         if( (variable=words[1]) ) {
 281
 282                 char* val;
 283                 if( (val=words[2]) ) {
 284
 285                         if(!strcmp(variable,"pretty_print")) {
 286                                 if(!strcmp(val,"true")) {
 287                                         pretty_print = 1;
 288                                         printf("pretty_print = true\n");
 289                                         return 1;
 290                                 }
 291                                 if(!strcmp(val,"false")) {
 292                                         pretty_print = 0;
 293                                         printf("pretty_print = false\n");
 294                                         return 1;
 295                                 }
 296                         }
 297                 }
 298         }
 299
 300         return 0;
 301 }
 302
 303
 304 int handle_print( char* words[]) {
 305
 306         char* variable;
 307         if( (variable=words[1]) ) {
 308                 if(!strcmp(variable,"pretty_print")) {
 309                         if(pretty_print) {
 310                                 printf("pretty_print = true\n");
 311                                 return 1;
 312                         } else {
 313                                 printf("pretty_print = false\n");
 314                                 return 1;
 315                         }
 316                 }
 317
 318                 if(!strcmp(variable,"login")) {
 319                         printf("login session = %s\n", login_session );
 320                         return 1;
 321                 }
 322
 323         }
 324         return 0;
 325 }
 326
 327 int handle_router( char* words[] ) {
 328
 329         if(!client)
 330                 return 1;
 331
 332         int i;
 333
 334         if( words[1] ) {
 335                 if( !strcmp(words[1],"query") ) {
 336
 337                         if( words[2] && !strcmp(words[2],"servers") ) {
 338                                 for(i=3; i < COMMAND_BUFSIZE - 3 && words[i]; i++ ) {
 339                                         router_query_servers( words[i] );
 340                                 }
 341                                 return 1;
 342                         }
 343                         return 0;
 344                 }
 345                 return 0;
 346         }
 347         return 0;
 348 }
 349
 350
 351 int handle_exec(char* words[]) {
 352
 353         int len = strlen(words[0]);
 354         char command[len];
 355         memset(command,0,len);
 356
 357         int i; /* chop out the ! */
 358         for( i=1; i!= len; i++) {
 359                 command[i-1] = words[0][i];
 360         }
 361
 362         free(words[0]);
 363         words[0] = strdup(command);
 364         signal(SIGCHLD,sig_child_handler);
 365         if(fork()) {
 366                 while(1) {
 367                         sleep(100);
 368                         if(child_dead) {
 369                                 signal(SIGCHLD,sig_child_handler);
 370                                 child_dead = 0;
 371                                 break;
 372                         }
 373                 }
 374         } else {
 375                 execvp( words[0], words );
 376                 exit(0);
 377         }
 378         return 1;
 379 }
 380
 381
 382 int handle_request( char* words[], int relay ) {
 383
 384         if(!client)
 385                 return 1;
 386
 387         if(words[1]) {
 388                 char* server = words[1];
 389                 char* method = words[2];
 390                 int i;
 391                 growing_buffer* buffer = NULL;
 392                 if(!relay) {
 393                         buffer = buffer_init(128);
 394                         buffer_add(buffer, "[");
 395                         for(i = 3; words[i] != NULL; i++ ) {
 396                                 /* removes trailing semicolon if user accidentally enters it */
 397                                 if( words[i][strlen(words[i])-1] == ';' )
 398                                         words[i][strlen(words[i])-1] = '\0';
 399                                 buffer_add( buffer, words[i] );
 400                                 buffer_add(buffer, " ");
 401                         }
 402                         buffer_add(buffer, "]");
 403                 }
 404
 405                 return send_request( server, method, buffer, relay );
 406         }
 407
 408         return 0;
 409 }
 410
 411 int send_request( char* server,
 412                 char* method, growing_buffer* buffer, int relay ) {
 413         if( server == NULL || method == NULL )
 414                 return 0;
 415
 416         json* params = NULL;
 417         if( !relay ) {
 418                 if( buffer != NULL && buffer->n_used > 0 )
 419                         params = json_tokener_parse(buffer->buf);
 420         } else {
 421                 if(!last_result || ! last_result->result_content) {
 422                         printf("We're not going to call 'relay' with no result params\n");
 423                         return 1;
 424                 }
 425                 else {
 426                         json* arr = json_object_new_array();
 427                         json_object_array_add( arr, last_result->result_content );
 428                         params = arr;
 429                 }
 430         }
 431
 432         osrf_app_session* session = osrf_app_client_session_init(server);
 433
 434         if(!osrf_app_session_connect(session)) {
 435                 warning_handler( "Unable to connect to remote service %s\n", server );
 436                 return 1;
 437         }
 438
 439         double start = get_timestamp_millis();
 440         int req_id = osrf_app_session_make_request( session, params, method, 1 );
 441
 442
 443         osrf_message* omsg = osrf_app_session_request_recv( session, req_id, 12 );
 444
 445
 446         if(!omsg)
 447                 printf("\nReceived no data from server\n");
 448
 449
 450         signal(SIGPIPE, SIG_IGN);
 451
 452         FILE* less = popen( "less -EX", "w");
 453         if( less == NULL ) { less = stdout; }
 454
 455         growing_buffer* resp_buffer = buffer_init(4096);
 456
 457         while(omsg) {
 458
 459                 if(omsg->result_content) {
 460
 461                         osrf_message_free(last_result);
 462                         last_result = omsg;
 463
 464                         char* content;
 465
 466                         if( pretty_print )
 467                                 content = json_printer( omsg->result_content );
 468                         else
 469                                 content = json_object_get_string(omsg->result_content);
 470
 471                         buffer_add( resp_buffer, "\nReceived Data: " );
 472                         buffer_add( resp_buffer, content );
 473                         buffer_add( resp_buffer, "\n" );
 474                         free(content);
 475
 476                 } else {
 477
 478                         buffer_add( resp_buffer, "\nReceived Exception:\nName: " );
 479                         buffer_add( resp_buffer, omsg->status_name );
 480                         buffer_add( resp_buffer, "\nStatus: " );
 481                         buffer_add( resp_buffer, omsg->status_text );
 482                         buffer_add( resp_buffer, "\nStatus: " );
 483                         char code[16];
 484                         memset(code, 0, 16);
 485                         sprintf( code, "%d", omsg->status_code );
 486                         buffer_add( resp_buffer, code );
 487                 }
 488
 489
 490                 omsg = osrf_app_session_request_recv( session, req_id, 5 );
 491
 492         }
 493
 494         double end = get_timestamp_millis();
 495
 496         fprintf( less, resp_buffer->buf );
 497         buffer_free( resp_buffer );
 498         fprintf( less, "\n------------------------------------\n");
 499         if( osrf_app_session_request_complete( session, req_id ))
 500                 fprintf(less, "Request Completed Successfully\n");
 501
 502
 503         fprintf(less, "Request Time in seconds: %.3f\n", end - start );
 504         fprintf(less, "------------------------------------\n");
 505
 506         pclose(less);
 507
 508         osrf_app_session_request_finish( session, req_id );
 509         osrf_app_session_disconnect( session );
 510         osrf_app_session_destroy( session );
 511
 512
 513         return 1;
 514
 515
 516 }
 517
 518 int handle_time( char* words[] ) {
 519
 520         if( ! words[1] ) {
 521
 522                 char buf[36];
 523                 memset(buf,0,36);
 524                 get_timestamp(buf);
 525                 printf( "%s\n", buf );
 526                 return 1;
 527         }
 528
 529         if( words[1] ) {
 530                 time_t epoch = (time_t)atoi( words[1] );
 531                 char* localtime = strdup( ctime( &epoch ) );
 532                 printf( "%s => %s", words[1], localtime );
 533                 free(localtime);
 534                 return 1;
 535         }
 536
 537         return 0;
 538
 539 }
 540
 541
 542
 543 int router_query_servers( char* router_server ) {
 544
 545         if( ! router_server || strlen(router_server) == 0 )
 546                 return 0;
 547
 548         char rbuf[256];
 549         memset(rbuf,0,256);
 550         sprintf(rbuf,"router@%s/router", router_server );
 551
 552         transport_message* send =
 553                 message_init( "servers", NULL, NULL, rbuf, NULL );
 554         message_set_router_info( send, NULL, NULL, NULL, "query", 0 );
 555
 556         client_send_message( client, send );
 557         message_free( send );
 558
 559         transport_message* recv = client_recv( client, -1 );
 560         if( recv == NULL ) {
 561                 fprintf(stderr, "NULL message received from router\n");
 562                 return 1;
 563         }
 564
 565         printf(
 566                         "---------------------------------------------------------------------------------\n"
 567                         "Received from 'server' query on %s\n"
 568                         "---------------------------------------------------------------------------------\n"
 569                         "original reg time | latest reg time | last used time | class | server\n"
 570                         "---------------------------------------------------------------------------------\n"
 571                         "%s"
 572                         "---------------------------------------------------------------------------------\n"
 573                         , router_server, recv->body );
 574
 575         message_free( recv );
 576
 577         return 1;
 578 }
 579
 580 int print_help() {
 581
 582         printf(
 583                         "---------------------------------------------------------------------------------\n"
 584                         "Commands:\n"
 585                         "---------------------------------------------------------------------------------\n"
 586                         "help                   - Display this message\n"
 587                         "!<command> [args] - Forks and runs the given command in the shell\n"
 588                         "time                   - Prints the current time\n"
 589                         "time <timestamp>       - Formats seconds since epoch into readable format\n"
 590                         "set <variable> <value> - set a srfsh variable (e.g. set pretty_print true )\n"
 591                         "print <variable>               - Displays the value of a srfsh variable\n"
 592                         "---------------------------------------------------------------------------------\n"
 593
 594                         "router query servers <server1 [, server2, ...]>\n"
 595                         "       - Returns stats on connected services\n"
 596                         "\n"
 597                         "\n"
 598                         "request <service> <method> [ <json formatted string of params> ]\n"
 599                         "       - Anything passed in will be wrapped in a json array,\n"
 600                         "               so add commas if there is more than one param\n"
 601                         "\n"
 602                         "\n"
 603                         "relay <service> <method>\n"
 604                         "       - Performs the requested query using the last received result as the param\n"
 605                         "\n"
 606                         "\n"
 607                         "math_bench <num_batches> [0|1|2]\n"
 608                         "       - 0 means don't reconnect, 1 means reconnect after each batch of 4, and\n"
 609                         "                2 means reconnect after every request\n"
 610                         "\n"
 611                         "introspect <service>\n"
 612                         "       - prints the API for the service\n"
 613                         "\n"
 614                         "\n"
 615                         "---------------------------------------------------------------------------------\n"
 616                         " Commands for Open-ILS\n"
 617                         "---------------------------------------------------------------------------------\n"
 618                         "login <username> <password>\n"
 619                         "       -       Logs into the 'server' and displays the session id\n"
 620                         "       - To view the session id later, enter: print login\n"
 621                         "---------------------------------------------------------------------------------\n"
 622                         "\n"
 623                         "\n"
 624                         "Note: long output is piped through 'less'.  To search in 'less', type: /<search>\n"
 625                         "---------------------------------------------------------------------------------\n"
 626                         "\n"
 627                         );
 628
 629         return 1;
 630 }
 631
 632
 633
 634 char* tabs(int count) {
 635         growing_buffer* buf = buffer_init(24);
 636         int i;
 637         for(i=0;i!=count;i++)
 638                 buffer_add(buf, "   ");
 639
 640         char* final = buffer_data( buf );
 641         buffer_free( buf );
 642         return final;
 643 }
 644
 645 char* json_printer( json* object ) {
 646
 647         if(object == NULL)
 648                 return NULL;
 649         char* string = json_object_get_string(object);
 650
 651         growing_buffer* buf = buffer_init(64);
 652         int i;
 653         int tab_var = 0;
 654         for(i=0; i!= strlen(string); i++) {
 655
 656                 if( string[i] == '{' ) {
 657
 658                         buffer_add(buf, "\n");
 659                         char* tab = tabs(tab_var);
 660                         buffer_add(buf, tab);
 661                         free(tab);
 662                         buffer_add( buf, "{");
 663                         tab_var++;
 664                         buffer_add( buf, "\n" );
 665                         tab = tabs(tab_var);
 666                         buffer_add( buf, tab );
 667                         free(tab);
 668
 669                 } else if( string[i] == '[' ) {
 670
 671                         buffer_add(buf, "\n");
 672                         char* tab = tabs(tab_var);
 673                         buffer_add(buf, tab);
 674                         free(tab);
 675                         buffer_add( buf, "[");
 676                         tab_var++;
 677                         buffer_add( buf, "\n" );
 678                         tab = tabs(tab_var);
 679                         buffer_add( buf, tab );
 680                         free(tab);
 681
 682                 } else if( string[i] == '}' ) {
 683
 684                         tab_var--;
 685                         buffer_add(buf, "\n");
 686                         char* tab = tabs(tab_var);
 687                         buffer_add(buf, tab);
 688                         free(tab);
 689                         buffer_add( buf, "}");
 690                         buffer_add( buf, "\n" );
 691                         tab = tabs(tab_var);
 692                         buffer_add( buf, tab );
 693                         free(tab);
 694
 695                 } else if( string[i] == ']' ) {
 696
 697                         tab_var--;
 698                         buffer_add(buf, "\n");
 699                         char* tab = tabs(tab_var);
 700                         buffer_add(buf, tab);
 701                         free(tab);
 702                         buffer_add( buf, "]");
 703                         buffer_add( buf, "\n" );
 704                         tab = tabs(tab_var);
 705                         buffer_add( buf, tab );
 706                         free(tab);
 707
 708                 } else if( string[i] == ',' ) {
 709
 710                         buffer_add( buf, ",");
 711                         buffer_add( buf, "\n" );
 712                         char* tab = tabs(tab_var);
 713                         buffer_add(buf, tab);
 714                         free(tab);
 715
 716                 } else {
 717
 718                         char b[2];
 719                         b[0] = string[i];
 720                         b[1] = '\0';
 721                         buffer_add( buf, b );
 722                 }
 723
 724         }
 725
 726         char* result = buffer_data(buf);
 727         buffer_free(buf);
 728         return result;
 729
 730 }
 731
 732 int handle_math( char* words[] ) {
 733         if( words[1] && words[2] )
 734                 return do_math( atoi(words[1]), atoi(words[2]) );
 735         return 0;
 736 }
 737
 738
 739 int do_math( int count, int style ) {
 740
 741         osrf_app_session* session = osrf_app_client_session_init(  "opensrf.math" );
 742
 743         json* params = json_object_new_array();
 744         json_object_array_add(params, json_object_new_string("1"));
 745         json_object_array_add(params, json_object_new_string("2"));
 746
 747         char* methods[] = { "add", "sub", "mult", "div" };
 748         char* answers[] = { "3", "-1", "2", "0.500000" };
 749
 750         float times[ count * 4 ];
 751         memset(times,0,count*4);
 752
 753         int k;
 754         for(k=0;k!=100;k++) {
 755                 if(!(k%10))
 756                         fprintf(stderr,"|");
 757                 else
 758                         fprintf(stderr,".");
 759         }
 760
 761         fprintf(stderr,"\n\n");
 762
 763         int running = 0;
 764         int i;
 765         for(i=0; i!= count; i++) {
 766
 767                 int j;
 768                 for(j=0; j != 4; j++) {
 769
 770                         ++running;
 771                         struct timeb t1;
 772                         struct timeb t2;
 773
 774                         ftime(&t1);
 775                         int req_id = osrf_app_session_make_request( session, params, methods[j], 1 );
 776
 777
 778                         osrf_message* omsg = osrf_app_session_request_recv( session, req_id, 5 );
 779
 780                         ftime(&t2);
 781
 782                         double start    = ( (int)t1.time        + ( ((float)t1.millitm) / 1000 ) );
 783                         double end              = ( (int)t2.time        + ( ((float)t2.millitm) / 1000 ) );
 784
 785                         times[(4*i) + j] = end - start;
 786
 787                         if(omsg) {
 788
 789                                 if(omsg->result_content) {
 790                                         char* jsn = json_object_get_string( omsg->result_content );
 791                                         if(!strcmp(jsn, answers[j]))
 792                                                 fprintf(stderr, "+");
 793                                         else
 794                                                 fprintf(stderr, "\n![%s] - should be %s\n", jsn, answers[j] );
 795                                 }
 796
 797                                 osrf_message_free(omsg);
 798
 799                         } else { fprintf( stderr, "\nempty message for tt: %d\n", req_id ); }
 800
 801                         osrf_app_session_request_finish( session, req_id );
 802
 803                         if(style == 2)
 804                                 osrf_app_session_disconnect( session );
 805
 806                         if(!(running%100))
 807                                 fprintf(stderr,"\n");
 808                 }
 809
 810                 if(style==1)
 811                         osrf_app_session_disconnect( session );
 812         }
 813
 814         osrf_app_session_destroy( session );
 815         json_object_put( params );
 816
 817         int c;
 818         float total = 0;
 819         for(c=0; c!= count*4; c++)
 820                 total += times[c];
 821
 822         float avg = total / (count*4);
 823         fprintf(stderr, "\n      Average round trip time: %f\n", avg );
 824
 825         return 1;
 826 }