src/client/main.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  * - Dispense Client
   5  *
   6  * main.c - Core and Initialisation
   7  *
   8  * This file is licenced under the 3-clause BSD Licence. See the file
   9  * COPYING for full details.
  10  */
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include <ctype.h>      // isspace
  15 #include <stdarg.h>
  16 #include <regex.h>
  17 #include <ncurses.h>
  18 #include <limits.h>
  19
  20 #include <unistd.h>     // close
  21 #include <netdb.h>      // gethostbyname
  22 #include <pwd.h>        // getpwuids
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26 //#include <openssl/sha.h>      // SHA1
  27
  28 #define USE_NCURSES_INTERFACE   0
  29 #define DEBUG_TRACE_SERVER      0
  30 #define USE_AUTOAUTH    1
  31
  32 #define MAX_TXT_ARGS    5       // Maximum number of textual arguments (including command)
  33 #define DISPENSE_MULTIPLE_MAX   20      // Maximum argument to -c
  34
  35 enum eUI_Modes
  36 {
  37         UI_MODE_BASIC,  // Non-NCurses
  38         UI_MODE_STANDARD,
  39         UI_MODE_DRINKSONLY,
  40         UI_MODE_ALL,
  41         NUM_UI_MODES
  42 };
  43
  44 enum eReturnValues
  45 {
  46         RV_SUCCESS,
  47         RV_BAD_ITEM,
  48         RV_INVALID_USER,
  49         RV_PERMISSIONS,
  50         RV_ARGUMENTS,
  51         RV_BALANCE,
  52         RV_SERVER_ERROR,        // Generic for 5xx codes
  53         RV_UNKNOWN_ERROR = -1,
  54         RV_SOCKET_ERROR = -2,
  55         RV_UNKNOWN_RESPONSE = -3,
  56 };
  57
  58 // === TYPES ===
  59 typedef struct sItem {
  60         char    *Type;
  61          int    ID;
  62          int    Status; // 0: Availiable, 1: Sold out, -1: Error
  63         char    *Desc;
  64          int    Price;
  65 }       tItem;
  66
  67 // === PROTOTYPES ===
  68 void    ShowUsage(void);
  69  int    main(int argc, char *argv[]);
  70 // --- GUI ---
  71  int    ShowNCursesUI(void);
  72  int    ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted);
  73 void    PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
  74 // --- Coke Server Communication ---
  75  int    OpenConnection(const char *Host, int Port);
  76  int    Authenticate(int Socket);
  77  int    GetUserBalance(int Socket);
  78 void    PopulateItemList(int Socket);
  79  int    Dispense_ItemInfo(int Socket, const char *Type, int ID);
  80  int    DispenseItem(int Socket, const char *Type, int ID);
  81  int    Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason);
  82  int    Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason);
  83  int    Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason);
  84  int    Dispense_Refund(int Socket, const char *Username, const char *Item, int PriceOverride);
  85  int    Dispense_Donate(int Socket, int Ammount, const char *Reason);
  86  int    Dispense_EnumUsers(int Socket);
  87  int    Dispense_ShowUser(int Socket, const char *Username);
  88 void    _PrintUserLine(const char *Line);
  89  int    Dispense_AddUser(int Socket, const char *Username);
  90  int    Dispense_SetUserType(int Socket, const char *Username, const char *TypeString, const char *Reason);
  91  int    Dispense_SetItem(int Socket, const char *Type, int ID, int NewPrice, const char *NewName);
  92 // --- Helpers ---
  93 char    *ReadLine(int Socket);
  94  int    sendf(int Socket, const char *Format, ...);
  95 char    *trim(char *string);
  96  int    RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage);
  97 void    CompileRegex(regex_t *regex, const char *pattern, int flags);
  98
  99 // === GLOBALS ===
 100 char    *gsDispenseServer = "merlo.ucc.gu.uwa.edu.au";
 101  int    giDispensePort = 11020;
 102
 103 tItem   *gaItems;
 104  int    giNumItems;
 105 regex_t gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex, gUserItemIdentRegex;
 106  int    gbIsAuthenticated = 0;
 107
 108 char    *gsItemPattern; //!< Item pattern
 109 char    *gsEffectiveUser;       //!< '-u' Dispense as another user
 110
 111  int    giUIMode = UI_MODE_STANDARD;
 112  int    gbDryRun = 0;   //!< '-n' Read-only
 113  int    gbDisallowSelectWithoutBalance = 1;     //!< Don't allow items to be hilighted if not affordable
 114
 115  int    giMinimumBalance = INT_MIN;     //!< '-m' Minumum balance for `dispense acct`
 116  int    giMaximumBalance = INT_MAX;     //!< '-M' Maximum balance for `dispense acct`
 117
 118  char   *gsUserName;    //!< User that dispense will happen as
 119 char    *gsUserFlags;   //!< User's flag set
 120  int    giUserBalance = -1;     //!< User balance (set by Authenticate)
 121  int    giDispenseCount = 1;    //!< Number of dispenses to do
 122
 123 char    *gsTextArgs[MAX_TXT_ARGS];
 124  int    giTextArgc;
 125
 126 // === CODE ===
 127 void ShowUsage(void)
 128 {
 129         printf( "Usage:\n" );
 130         if( giTextArgc == 0 )
 131                 printf(
 132                         "  == Everyone ==\n"
 133                         "    dispense\n"
 134                         "        Show interactive list\n"
 135                         "    dispense <name>|<index>|<itemid>\n"
 136                         "        Dispense named item (<name> matches if it is a unique prefix)\n"
 137                         );
 138         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "give") == 0 )
 139                 printf(
 140                         "    dispense give <user> <ammount> \"<reason>\"\n"
 141                         "        Give money to another user\n"
 142                         );
 143
 144         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "donate") == 0 )
 145                 printf(
 146                         "    dispense donate <ammount> \"<reason>\"\n"
 147                         "        Donate to the club\n"
 148                         );
 149         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "iteminfo") == 0 )
 150                 printf(
 151                         "    dispense iteminfo <itemid>\n"
 152                         "        Get the name and price for an item\n"
 153                         );
 154 //      if( giTextArgc == 0 || strcmp(gsTextArgs[0], "enumitems") == 0 )
 155 //              printf(
 156 //                      "    dispense enumitems\n"
 157 //                      "        List avaliable items\n"
 158 //                      );
 159         if( giTextArgc == 0 )
 160                 printf("  == Coke members == \n");
 161         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "acct") == 0 )
 162                 printf(
 163                         "    dispense acct [<user>]\n"
 164                         "        Show user balances\n"
 165                         "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
 166                         "        Alter a account value\n"
 167                         "    dispense acct <user> =<ammount> \"<reason>\"\n"
 168                         "        Set an account balance\n"
 169                         );
 170         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "refund") == 0 )
 171                 printf(
 172                         "    dispense refund <user> <itemid> [<price>]\n"
 173                         "        Refund an item to a user (with optional price override)\n"
 174                         "        Item IDs can be seen in the cokelog (in the brackets after the item name)\n"
 175                         "        e.g. coke:6 for a coke, snack:33 for slot 33 of the snack machine\n"
 176                         );
 177         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "slot") == 0 )
 178                 printf(
 179                         "    dispense slot <itemid> <price> <name>\n"
 180                         "        Rename/Re-price a slot\n"
 181                         );
 182         if( giTextArgc == 0 )
 183                 printf("  == Dispense administrators ==\n");
 184         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "user") == 0 )
 185                 printf(
 186                         "    dispense user add <user>\n"
 187                         "        Create new account\n"
 188                         "    dispense user type <user> <flags> <reason>\n"
 189                         "        Alter a user's flags\n"
 190                         "        <flags> is a comma-separated list of user, coke, admin, internal or disabled\n"
 191                         "        Flags are removed by preceding the name with '-' or '!'\n"
 192                         );
 193         if( giTextArgc == 0 )
 194                 printf( "\n"
 195                         "General Options:\n"
 196                         "    -c <count>\n"
 197                         "        Dispense multiple times\n"
 198                         "    -u <username>\n"
 199                         "        Set a different user (Coke members only)\n"
 200                         "    -h / -?\n"
 201                         "        Show help text\n"
 202                         "    -G\n"
 203                         "        Use simple textual interface (instead of ncurses)\n"
 204                         "    -n\n"
 205                         "        Dry run - Do not actually do dispenses\n"
 206                         "    -m <min balance>\n"
 207                         "    -M <max balance>\n"
 208                         "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
 209                         "Definitions:\n"
 210                         "    <itemid>\n"
 211                         "        Item ID of the form <type>:<num> where <type> is a non-empty string of alpha-numeric characters, and <num> is a non-negative integer\n"
 212 //                      "    <user>\n"
 213 //                      "        Account name\n"
 214                         );
 215 }
 216
 217 int main(int argc, char *argv[])
 218 {
 219          int    sock;
 220          int    i, ret = 0;
 221         char    buffer[BUFSIZ];
 222
 223         gsTextArgs[0] = "";
 224
 225         // -- Create regular expressions
 226         // > Code Type Count ...
 227         CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED);     //
 228         // > Code Type Ident Status Price Desc
 229         CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z]+):([0-9]+)\\s+(avail|sold|error)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
 230         // > Code 'SALT' salt
 231         CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+(.+)$", REG_EXTENDED);
 232         // > Code 'User' Username Balance Flags
 233         CompileRegex(&gUserInfoRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([^ ]+)\\s+(-?[0-9]+)\\s+(.+)$", REG_EXTENDED);
 234         // > Item Ident
 235         CompileRegex(&gUserItemIdentRegex, "^([A-Za-z]+):([0-9]+)$", REG_EXTENDED);
 236
 237         // Parse Arguments
 238         for( i = 1; i < argc; i ++ )
 239         {
 240                 char    *arg = argv[i];
 241
 242                 if( arg[0] == '-' )
 243                 {
 244                         switch(arg[1])
 245                         {
 246                         case 'h':
 247                         case '?':
 248                                 ShowUsage();
 249                                 return 0;
 250
 251                         case 'c':
 252                                 if( i + 1 >= argc ) {
 253                                         fprintf(stderr, "%s: -c takes an argument\n", argv[0]);
 254                                         ShowUsage();
 255                                         return -1;
 256                                 }
 257                                 giDispenseCount = atoi(argv[++i]);
 258                                 if( giDispenseCount < 1 || giDispenseCount > DISPENSE_MULTIPLE_MAX ) {
 259                                         fprintf(stderr, "Sorry, only 1-20 can be passed to -c (safety)\n");
 260                                         return -1;
 261                                 }
 262
 263                                 break ;
 264
 265                         case 'm':       // Minimum balance
 266                                 if( i + 1 >= argc ) {
 267                                         fprintf(stderr, "%s: -m takes an argument\n", argv[0]);
 268                                         ShowUsage();
 269                                         return RV_ARGUMENTS;
 270                                 }
 271                                 giMinimumBalance = atoi(argv[++i]);
 272                                 break;
 273                         case 'M':       // Maximum balance
 274                                 if( i + 1 >= argc ) {
 275                                         fprintf(stderr, "%s: -M takes an argument\n", argv[0]);
 276                                         ShowUsage();
 277                                         return RV_ARGUMENTS;
 278                                 }
 279                                 giMaximumBalance = atoi(argv[++i]);
 280                                 break;
 281
 282                         case 'u':       // Override User
 283                                 if( i + 1 >= argc ) {
 284                                         fprintf(stderr, "%s: -u takes an argument\n", argv[0]);
 285                                         ShowUsage();
 286                                         return RV_ARGUMENTS;
 287                                 }
 288                                 gsEffectiveUser = argv[++i];
 289                                 break;
 290
 291                         case 'H':       // Override remote host
 292                                 if( i + 1 >= argc ) {
 293                                         fprintf(stderr, "%s: -H takes an argument\n", argv[0]);
 294                                         ShowUsage();
 295                                         return RV_ARGUMENTS;
 296                                 }
 297                                 gsDispenseServer = argv[++i];
 298                                 break;
 299                         case 'P':       // Override remote port
 300                                 if( i + 1 >= argc ) {
 301                                         fprintf(stderr, "%s: -P takes an argument\n", argv[0]);
 302                                         ShowUsage();
 303                                         return RV_ARGUMENTS;
 304                                 }
 305                                 giDispensePort = atoi(argv[++i]);
 306                                 break;
 307
 308                         // Set slot name/price
 309                         case 's':
 310                                 if( giTextArgc != 0 ) {
 311                                         fprintf(stderr, "%s: -s must appear before other arguments\n", argv[0]);
 312                                         ShowUsage();
 313                                         return RV_ARGUMENTS;
 314                                 }
 315                                 gsTextArgs[0] = "slot"; // HACK!!
 316                                 giTextArgc ++;
 317                                 break;
 318
 319                         case 'G':       // Don't use GUI
 320                                 giUIMode = UI_MODE_BASIC;
 321                                 break;
 322                         case 'D':       // Drinks only
 323                                 giUIMode = UI_MODE_DRINKSONLY;
 324                                 break;
 325                         case 'n':       // Dry Run / read-only
 326                                 gbDryRun = 1;
 327                                 break;
 328                         case '-':
 329                                 if( strcmp(argv[i], "--help") == 0 ) {
 330                                         ShowUsage();
 331                                         return 0;
 332                                 }
 333                                 else if( strcmp(argv[i], "--dry-run") == 0 ) {
 334                                         gbDryRun = 1;
 335                                 }
 336                                 else if( strcmp(argv[i], "--drinks-only") == 0 ) {
 337                                         giUIMode = UI_MODE_DRINKSONLY;
 338                                 }
 339                                 else if( strcmp(argv[i], "--can-select-all") == 0 ) {
 340                                         gbDisallowSelectWithoutBalance = 0;
 341                                 }
 342                                 else {
 343                                         fprintf(stderr, "%s: Unknown switch '%s'\n", argv[0], argv[i]);
 344                                         ShowUsage();
 345                                         return RV_ARGUMENTS;
 346                                 }
 347                                 break;
 348                         default:
 349                                 // The first argument is not allowed to begin with 'i'
 350                                 // (catches most bad flags)
 351                                 if( giTextArgc == 0 ) {
 352                                         fprintf(stderr, "%s: Unknown switch '%s'\n", argv[0], argv[i]);
 353                                         ShowUsage();
 354                                         return RV_ARGUMENTS;
 355                                 }
 356                                 if( giTextArgc == MAX_TXT_ARGS )
 357                                 {
 358                                         fprintf(stderr, "ERROR: Too many arguments\n");
 359                                         return RV_ARGUMENTS;
 360                                 }
 361                                 gsTextArgs[giTextArgc++] = argv[i];
 362                                 break;
 363                         }
 364
 365                         continue;
 366                 }
 367
 368                 if( giTextArgc == MAX_TXT_ARGS )
 369                 {
 370                         fprintf(stderr, "ERROR: Too many arguments\n");
 371                         return RV_ARGUMENTS;
 372                 }
 373
 374                 gsTextArgs[giTextArgc++] = argv[i];
 375
 376         }
 377
 378         //
 379         // `dispense acct`
 380         // -
 381         if( strcmp(gsTextArgs[0], "acct") == 0 )
 382         {
 383                 // Connect to server
 384                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 385                 if( sock < 0 )  return RV_SOCKET_ERROR;
 386                 // List accounts?
 387                 if( giTextArgc == 1 ) {
 388                         ret = Dispense_EnumUsers(sock);
 389                         close(sock);
 390                         return ret;
 391                 }
 392
 393                 // gsTextArgs[1]: Username
 394
 395                 // Alter account?
 396                 if( giTextArgc != 2 )
 397                 {
 398                         if( giTextArgc != 4 ) {
 399                                 fprintf(stderr, "`dispense acct` requires a reason\n");
 400                                 ShowUsage();
 401                                 return RV_ARGUMENTS;
 402                         }
 403
 404                         // Authentication required
 405                         ret = Authenticate(sock);
 406                         if(ret) return ret;
 407
 408                         // gsTextArgs[1]: Username
 409                         // gsTextArgs[2]: Ammount
 410                         // gsTextArgs[3]: Reason
 411
 412                         if( gsTextArgs[2][0] == '=' ) {
 413                                 // Set balance
 414                                 if( gsTextArgs[2][1] != '0' && atoi(gsTextArgs[2]+1) == 0 ) {
 415                                         fprintf(stderr, "Error: Invalid balance to be set\n");
 416                                         exit(1);
 417                                 }
 418
 419                                 ret = Dispense_SetBalance(sock, gsTextArgs[1], atoi(gsTextArgs[2]+1), gsTextArgs[3]);
 420                         }
 421                         else {
 422                                 // Alter balance
 423                                 ret = Dispense_AlterBalance(sock, gsTextArgs[1], atoi(gsTextArgs[2]), gsTextArgs[3]);
 424                         }
 425                 }
 426                 // On error, quit
 427                 if( ret ) {
 428                         close(sock);
 429                         return ret;
 430                 }
 431
 432                 // Show user information
 433                 ret = Dispense_ShowUser(sock, gsTextArgs[1]);
 434
 435                 close(sock);
 436                 return ret;
 437         }
 438         //
 439         // `dispense give`
 440         // - "Here, have some money."
 441         else if( strcmp(gsTextArgs[0], "give") == 0 )
 442         {
 443                 if( giTextArgc != 4 ) {
 444                         fprintf(stderr, "`dispense give` takes three arguments\n");
 445                         ShowUsage();
 446                         return RV_ARGUMENTS;
 447                 }
 448
 449                 // gsTextArgs[1]: Destination
 450                 // gsTextArgs[2]: Ammount
 451                 // gsTextArgs[3]: Reason
 452
 453                 // Connect to server
 454                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 455                 if( sock < 0 )  return RV_SOCKET_ERROR;
 456
 457                 // Authenticate
 458                 ret = Authenticate(sock);
 459                 if(ret) return ret;
 460
 461                 ret = Dispense_Give(sock, gsTextArgs[1], atoi(gsTextArgs[2]), gsTextArgs[3]);
 462
 463                 close(sock);
 464
 465                 return ret;
 466         }
 467         //
 468         // `dispense user`
 469         // - User administration (Admin Only)
 470         if( strcmp(gsTextArgs[0], "user") == 0 )
 471         {
 472                 // Check argument count
 473                 if( giTextArgc == 1 ) {
 474                         fprintf(stderr, "Error: `dispense user` requires arguments\n");
 475                         ShowUsage();
 476                         return RV_ARGUMENTS;
 477                 }
 478
 479                 // Connect to server
 480                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 481                 if( sock < 0 )  return RV_SOCKET_ERROR;
 482
 483                 // Attempt authentication
 484                 ret = Authenticate(sock);
 485                 if(ret) return ret;
 486
 487                 // Add new user?
 488                 if( strcmp(gsTextArgs[1], "add") == 0 )
 489                 {
 490                         if( giTextArgc != 3 ) {
 491                                 fprintf(stderr, "Error: `dispense user add` requires an argument\n");
 492                                 ShowUsage();
 493                                 return RV_ARGUMENTS;
 494                         }
 495
 496                         ret = Dispense_AddUser(sock, gsTextArgs[2]);
 497                 }
 498                 // Update a user
 499                 else if( strcmp(gsTextArgs[1], "type") == 0 || strcmp(gsTextArgs[1], "flags") == 0 )
 500                 {
 501                         if( giTextArgc < 4 || giTextArgc > 5 ) {
 502                                 fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
 503                                 ShowUsage();
 504                                 return RV_ARGUMENTS;
 505                         }
 506
 507                         if( giTextArgc == 4 )
 508                                 ret = Dispense_SetUserType(sock, gsTextArgs[2], gsTextArgs[3], "");
 509                         else
 510                                 ret = Dispense_SetUserType(sock, gsTextArgs[2], gsTextArgs[3], gsTextArgs[4]);
 511                 }
 512                 else
 513                 {
 514                         fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
 515                         ShowUsage();
 516                         return RV_ARGUMENTS;
 517                 }
 518                 close(sock);
 519                 return ret;
 520         }
 521         // Donation!
 522         else if( strcmp(gsTextArgs[0], "donate") == 0 )
 523         {
 524                 // Check argument count
 525                 if( giTextArgc != 3 ) {
 526                         fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
 527                         ShowUsage();
 528                         return RV_ARGUMENTS;
 529                 }
 530
 531                 // Connect to server
 532                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 533                 if( sock < 0 )  return RV_SOCKET_ERROR;
 534
 535                 // Attempt authentication
 536                 ret = Authenticate(sock);
 537                 if(ret) return ret;
 538
 539                 // Do donation
 540                 ret = Dispense_Donate(sock, atoi(gsTextArgs[1]), gsTextArgs[2]);
 541
 542                 close(sock);
 543
 544                 return ret;
 545         }
 546         // Refund an item
 547         else if( strcmp(gsTextArgs[0], "refund") == 0 )
 548         {
 549                  int     price = 0;
 550                 // Check argument count
 551                 if( giTextArgc != 3 && giTextArgc != 4 ) {
 552                         fprintf(stderr, "Error: `dispense refund` takes 2 or 3 arguments\n");
 553                         ShowUsage();
 554                         return RV_ARGUMENTS;
 555                 }
 556
 557                 // Connect to server
 558                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 559                 if(sock < 0)    return RV_SOCKET_ERROR;
 560
 561                 // Attempt authentication
 562                 ret = Authenticate(sock);
 563                 if(ret) return ret;
 564
 565                 if( giTextArgc == 4 ) {
 566                         price = atoi(gsTextArgs[3]);
 567                         if( price <= 0 ) {
 568                                 fprintf(stderr, "Error: Override price is invalid (should be > 0)\n");
 569                                 return RV_ARGUMENTS;
 570                         }
 571                 }
 572
 573                 // Username, Item, cost
 574                 ret = Dispense_Refund(sock, gsTextArgs[1], gsTextArgs[2], price);
 575
 576                 // TODO: More
 577                 close(sock);
 578                 return ret;
 579         }
 580         // Query an item price
 581         else if( strcmp(gsTextArgs[0], "iteminfo") == 0 )
 582         {
 583                 regmatch_t matches[3];
 584                 char    *type;
 585                  int    id;
 586                 // Check argument count
 587                 if( giTextArgc != 2 ) {
 588                         fprintf(stderr, "Error: `dispense iteminfo` requires an argument\n");
 589                         ShowUsage();
 590                         return RV_ARGUMENTS;
 591                 }
 592                 // Parse item ID
 593                 if( RunRegex(&gUserItemIdentRegex, gsTextArgs[1], 3, matches, NULL) != 0 ) {
 594                         fprintf(stderr, "Error: Invalid item ID passed (<type>:<id> expected)\n");
 595                         return RV_ARGUMENTS;
 596                 }
 597                 type = gsTextArgs[1] + matches[1].rm_so;
 598                 gsTextArgs[1][ matches[1].rm_eo ] = '\0';
 599                 id = atoi( gsTextArgs[1] + matches[2].rm_so );
 600
 601                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 602                 if( sock < 0 )  return RV_SOCKET_ERROR;
 603
 604                 ret = Dispense_ItemInfo(sock, type, id);
 605                 close(sock);
 606                 return ret;
 607         }
 608         // Set slot
 609         else if( strcmp(gsTextArgs[0], "slot") == 0 )
 610         {
 611                 regmatch_t matches[3];
 612                 char    *item_type, *newname;
 613                  int    item_id, price;
 614
 615                 // Check arguments
 616                 if( giTextArgc != 4 ) {
 617                         fprintf(stderr, "Error: `dispense slot` takes three arguments\n");
 618                         ShowUsage();
 619                         return RV_ARGUMENTS;
 620                 }
 621
 622                 // Parse arguments
 623                 if( RunRegex(&gUserItemIdentRegex, gsTextArgs[1], 3, matches, NULL) != 0 ) {
 624                         fprintf(stderr, "Error: Invalid item ID passed (<type>:<id> expected)\n");
 625                         return RV_ARGUMENTS;
 626                 }
 627                 item_type = gsTextArgs[1] + matches[1].rm_so;
 628                 gsTextArgs[1][ matches[1].rm_eo ] = '\0';
 629                 item_id = atoi( gsTextArgs[1] + matches[2].rm_so );
 630
 631                 // - Price
 632                 price = atoi( gsTextArgs[2] );
 633                 if( price <= 0 && gsTextArgs[2][0] != '0' ) {
 634                         fprintf(stderr, "Error: Invalid price passed (must be >= 0)\n");
 635                         return RV_ARGUMENTS;
 636                 }
 637
 638                 // - New name
 639                 newname = gsTextArgs[3];
 640                 // -- Sanity
 641                 {
 642                         char *pos;
 643                         for( pos = newname; *pos; pos ++ )
 644                         {
 645                                 if( !isalnum(*pos) && *pos != ' ' ) {
 646                                         fprintf(stderr, "Error: You should only have letters, numbers and spaces in an item name\n");
 647                                         return RV_ARGUMENTS;
 648                                 }
 649                         }
 650                 }
 651
 652                 // Connect & Authenticate
 653                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 654                 if( sock < 0 )  return RV_SOCKET_ERROR;
 655                 ret = Authenticate(sock);
 656                 if(ret) return ret;
 657                 // Update the slot
 658                 ret = Dispense_SetItem(sock, item_type, item_id, price, newname);
 659
 660                 close(sock);
 661                 return ret;
 662         }
 663         // Item name / pattern
 664         else
 665         {
 666                 gsItemPattern = gsTextArgs[0];
 667         }
 668
 669         // Connect to server
 670         sock = OpenConnection(gsDispenseServer, giDispensePort);
 671         if( sock < 0 )  return RV_SOCKET_ERROR;
 672
 673         // Get the user's balance
 674         ret = GetUserBalance(sock);
 675         if(ret) return ret;
 676
 677         // Get items
 678         PopulateItemList(sock);
 679
 680         // Disconnect from server
 681         close(sock);
 682
 683         if( gsItemPattern && gsItemPattern[0] )
 684         {
 685                 regmatch_t matches[3];
 686                 // Door (hard coded)
 687                 if( strcmp(gsItemPattern, "door") == 0 )
 688                 {
 689                         // Connect, Authenticate, dispense and close
 690                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 691                         if( sock < 0 )  return RV_SOCKET_ERROR;
 692                         ret = Authenticate(sock);
 693                         if(ret) return ret;
 694                         ret = DispenseItem(sock, "door", 0);
 695                         close(sock);
 696                         return ret;
 697                 }
 698                 // Item id (<type>:<num>)
 699                 else if( RunRegex(&gUserItemIdentRegex, gsItemPattern, 3, matches, NULL) == 0 )
 700                 {
 701                         char    *ident;
 702                          int    id;
 703
 704                         // Get and finish ident
 705                         ident = gsItemPattern + matches[1].rm_so;
 706                         gsItemPattern[matches[1].rm_eo] = '\0';
 707                         // Get ID
 708                         id = atoi( gsItemPattern + matches[2].rm_so );
 709
 710                         // Connect, Authenticate, dispense and close
 711                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 712                         if( sock < 0 )  return RV_SOCKET_ERROR;
 713
 714                         Dispense_ItemInfo(sock, ident, id);
 715
 716                         ret = Authenticate(sock);
 717                         if(ret) return ret;
 718                         ret = DispenseItem(sock, ident, id);
 719                         close(sock);
 720                         return ret;
 721                 }
 722                 // Item number (6 = coke)
 723                 else if( strcmp(gsItemPattern, "0") == 0 || atoi(gsItemPattern) > 0 )
 724                 {
 725                         i = atoi(gsItemPattern);
 726                 }
 727                 // Item prefix
 728                 else
 729                 {
 730                          int    j;
 731                          int    best = -1;
 732                         for( i = 0; i < giNumItems; i ++ )
 733                         {
 734                                 // Prefix match (with case-insensitive match)
 735                                 for( j = 0; gsItemPattern[j]; j ++ )
 736                                 {
 737                                         if( gaItems[i].Desc[j] == gsItemPattern[j] )
 738                                                 continue;
 739                                         if( tolower(gaItems[i].Desc[j]) == tolower(gsItemPattern[j]) )
 740                                                 continue;
 741                                         break;
 742                                 }
 743                                 // Check if the prefix matched
 744                                 if( gsItemPattern[j] != '\0' )
 745                                         continue;
 746
 747                                 // Prefect match
 748                                 if( gaItems[i].Desc[j] == '\0' ) {
 749                                         best = i;
 750                                         break;
 751                                 }
 752
 753                                 // Only one match allowed
 754                                 if( best == -1 ) {
 755                                         best = i;
 756                                 }
 757                                 else {
 758                                         // TODO: Allow ambiguous matches?
 759                                         // or just print a wanrning
 760                                         printf("Warning - Ambiguous pattern, stopping\n");
 761                                         return RV_BAD_ITEM;
 762                                 }
 763                         }
 764
 765                         // Was a match found?
 766                         if( best == -1 )
 767                         {
 768                                 fprintf(stderr, "No item matches the passed string\n");
 769                                 return RV_BAD_ITEM;
 770                         }
 771
 772                         i = best;
 773                 }
 774         }
 775         else if( giUIMode != UI_MODE_BASIC )
 776         {
 777                 i = ShowNCursesUI();
 778         }
 779         else
 780         {
 781                 // Very basic dispense interface
 782                 for( i = 0; i < giNumItems; i ++ ) {
 783                         // Add a separator
 784                         if( i && strcmp(gaItems[i].Type, gaItems[i-1].Type) != 0 )
 785                                 printf("   ---\n");
 786
 787                         printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
 788                                 gaItems[i].Price, gaItems[i].Desc);
 789                 }
 790                 printf(" q Quit\n");
 791                 for(;;)
 792                 {
 793                         char    *buf;
 794
 795                         i = -1;
 796
 797                         fgets(buffer, BUFSIZ, stdin);
 798
 799                         buf = trim(buffer);
 800
 801                         if( buf[0] == 'q' )     break;
 802
 803                         i = atoi(buf);
 804
 805                         if( i != 0 || buf[0] == '0' )
 806                         {
 807                                 if( i < 0 || i >= giNumItems ) {
 808                                         printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
 809                                         continue;
 810                                 }
 811                                 break;
 812                         }
 813                 }
 814         }
 815
 816
 817         // Check for a valid item ID
 818         if( i >= 0 )
 819         {
 820                  int j;
 821                 // Connect, Authenticate, dispense and close
 822                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 823                 if( sock < 0 )  return RV_SOCKET_ERROR;
 824
 825                 ret = Dispense_ItemInfo(sock, gaItems[i].Type, gaItems[i].ID);
 826                 if(ret) return ret;
 827
 828                 ret = Authenticate(sock);
 829                 if(ret) return ret;
 830
 831                 for( j = 0; j < giDispenseCount; j ++ ) {
 832                         ret = DispenseItem(sock, gaItems[i].Type, gaItems[i].ID);
 833                         if( ret )       break;
 834                 }
 835                 if( j > 1 ) {
 836                         printf("%i items dispensed\n", j);
 837                 }
 838                 Dispense_ShowUser(sock, gsUserName);
 839                 close(sock);
 840
 841         }
 842
 843         return ret;
 844 }
 845
 846 // -------------------
 847 // --- NCurses GUI ---
 848 // -------------------
 849 /**
 850  * \brief Render the NCurses UI
 851  */
 852 int ShowNCursesUI(void)
 853 {
 854          int    ch;
 855          int    i, times;
 856          int    xBase, yBase;
 857         const int       displayMinWidth = 50;
 858         char    *titleString = "Dispense";
 859          int    items_in_view;
 860          int    maxItemIndex;
 861          int    itemBase = 0;
 862          int    currentItem;
 863          int    ret = -2;       // -2: Used for marking "no return yet"
 864
 865         char    balance_str[5+1+2+1];   // If $9999.99 is too little, something's wrong
 866         char    *username;
 867         struct passwd *pwd;
 868
 869          int    height, width;
 870
 871         // Get Username
 872         if( gsEffectiveUser )
 873                 username = gsEffectiveUser;
 874         else {
 875                 pwd = getpwuid( getuid() );
 876                 username = pwd->pw_name;
 877         }
 878         // Get balance
 879         snprintf(balance_str, sizeof(balance_str), "$%i.%02i", giUserBalance/100, abs(giUserBalance)%100);
 880
 881         // Enter curses mode
 882         initscr();
 883         cbreak(); noecho();
 884
 885         // Get max index
 886         maxItemIndex = ShowItemAt(0, 0, 0, -1, 0);
 887         // Get item count per screen
 888         // - 6: randomly chosen (Need at least 3)
 889         items_in_view = LINES - 6;
 890         if( items_in_view > maxItemIndex )
 891                 items_in_view = maxItemIndex;
 892         // Get first index
 893         currentItem = 0;
 894         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 895                 currentItem ++;
 896
 897
 898         // Get dimensions
 899         height = items_in_view + 3;
 900         width = displayMinWidth;
 901
 902         // Get positions
 903         xBase = COLS/2 - width/2;
 904         yBase = LINES/2 - height/2;
 905
 906         for( ;; )
 907         {
 908                 // Header
 909                 PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
 910
 911                 // Items
 912                 for( i = 0; i < items_in_view; i ++ )
 913                 {
 914                          int    pos = 0;
 915
 916                         move( yBase + 1 + i, xBase );
 917                         printw("| ");
 918
 919                         pos += 2;
 920
 921                         // Check for the '...' row
 922                         // - Oh god, magic numbers!
 923                         if( (i == 0 && itemBase > 0)
 924                          || (i == items_in_view - 1 && itemBase < maxItemIndex - items_in_view) )
 925                         {
 926                                 printw("     ...");     pos += 8;
 927                                 times = (width - pos) - 1;
 928                                 while(times--)  addch(' ');
 929                         }
 930                         // Show an item
 931                         else {
 932                                 ShowItemAt(
 933                                         yBase + 1 + i, xBase + pos,     // Position
 934                                         (width - pos) - 3,      // Width
 935                                         itemBase + i,   // Index
 936                                         !!(currentItem == itemBase + i) // Hilighted
 937                                         );
 938                                 printw("  ");
 939                         }
 940
 941                         // Scrollbar (if needed)
 942                         if( maxItemIndex > items_in_view ) {
 943                                 if( i == 0 ) {
 944                                         addch('A');
 945                                 }
 946                                 else if( i == items_in_view - 1 ) {
 947                                         addch('V');
 948                                 }
 949                                 else {
 950                                          int    percentage = itemBase * 100 / (maxItemIndex-items_in_view);
 951                                         if( i-1 == percentage*(items_in_view-3)/100 ) {
 952                                                 addch('#');
 953                                         }
 954                                         else {
 955                                                 addch('|');
 956                                         }
 957                                 }
 958                         }
 959                         else {
 960                                 addch('|');
 961                         }
 962                 }
 963
 964                 // Footer
 965                 PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
 966
 967                 // User line
 968                 // - Username, balance, flags
 969                 PrintAlign(yBase+height-1, xBase+1, width-2,
 970                         username, ' ', balance_str, ' ', gsUserFlags);
 971
 972
 973                 // Get input
 974                 ch = getch();
 975
 976                 if( ch == '\x1B' ) {
 977                         ch = getch();
 978                         if( ch == '[' ) {
 979                                 ch = getch();
 980
 981                                 switch(ch)
 982                                 {
 983                                 case 'B':
 984                                         currentItem ++;
 985                                         // Skip over spacers
 986                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 987                                                 currentItem ++;
 988
 989                                         if( currentItem >= maxItemIndex ) {
 990                                                 currentItem = 0;
 991                                                 // Skip over spacers
 992                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 993                                                         currentItem ++;
 994                                         }
 995                                         break;
 996                                 case 'A':
 997                                         currentItem --;
 998                                         // Skip over spacers
 999                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
1000                                                 currentItem --;
1001
1002                                         if( currentItem < 0 ) {
1003                                                 currentItem = maxItemIndex - 1;
1004                                                 // Skip over spacers
1005                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
1006                                                         currentItem --;
1007                                         }
1008                                         break;
1009                                 }
1010                         }
1011                         else {
1012
1013                         }
1014
1015                         // Scroll only if needed
1016                         if( items_in_view < maxItemIndex )
1017                         {
1018                                 // - If the current item is above the second item shown, and we're not at the top
1019                                 if( currentItem < itemBase + 2 && itemBase > 0 ) {
1020                                         itemBase = currentItem - 2;
1021                                         if(itemBase < 0)        itemBase = 0;
1022                                 }
1023                                 // - If the current item is below the second item show, and we're not at the bottom
1024                                 if( currentItem > itemBase + items_in_view - 2 && itemBase + items_in_view < maxItemIndex ) {
1025                                         itemBase = currentItem - items_in_view + 2;
1026                                         if( itemBase > maxItemIndex - items_in_view )
1027                                                 itemBase = maxItemIndex - items_in_view;
1028                                 }
1029                         }
1030                 }
1031                 else {
1032                         switch(ch)
1033                         {
1034                         case '\n':
1035                                 ret = ShowItemAt(0, 0, 0, currentItem, 0);
1036                                 break;
1037                         case 0x1b:      // Escape
1038                         case 'q':
1039                                 ret = -1;       // -1: Return with no dispense
1040                                 break;
1041                         }
1042
1043                         // Check if the return value was changed
1044                         if( ret != -2 ) break;
1045                 }
1046
1047         }
1048
1049
1050         // Leave
1051         endwin();
1052         return ret;
1053 }
1054
1055 /**
1056  * \brief Show item \a Index at (\a Col, \a Row)
1057  * \return Dispense index of item
1058  * \note Part of the NCurses UI
1059  */
1060 int ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted)
1061 {
1062         char    *name = NULL;
1063          int    price = 0;
1064          int    status = -1;
1065
1066         switch(giUIMode)
1067         {
1068         // Standard UI
1069         // - This assumes that
1070         case UI_MODE_STANDARD:
1071                 // Bounds check
1072                 // Index = -1, request limit
1073                 if( Index < 0 || Index >= giNumItems+2 )
1074                         return giNumItems+2;
1075                 // Drink label
1076                 if( Index == 0 )
1077                 {
1078                         price = 0;
1079                         name = "Coke Machine";
1080                         Index = -1;     // -1 indicates a label
1081                         break;
1082                 }
1083                 Index --;
1084                 // Drinks 0 - 6
1085                 if( Index <= 6 )
1086                 {
1087                         name = gaItems[Index].Desc;
1088                         price = gaItems[Index].Price;
1089                         status = gaItems[Index].Status;
1090                         break;
1091                 }
1092                 Index -= 7;
1093                 // EPS label
1094                 if( Index == 0 )
1095                 {
1096                         price = 0;
1097                         name = "Electronic Payment System";
1098                         Index = -1;     // -1 indicates a label
1099                         break;
1100                 }
1101                 Index --;
1102                 Index += 7;
1103                 name = gaItems[Index].Desc;
1104                 price = gaItems[Index].Price;
1105                 status = gaItems[Index].Status;
1106                 break;
1107         default:
1108                 return -1;
1109         }
1110
1111         // Width = 0, don't print
1112         if( Width > 0 )
1113         {
1114                 // 4 preceding, 5 price
1115                 int nameWidth = Width - 4 - snprintf(NULL, 0, " %4i", price);
1116                 move( Row, Col );
1117
1118                 if( Index >= 0 )
1119                 {
1120                         // Show hilight and status
1121                         switch( status )
1122                         {
1123                         case 0:
1124                                 if( bHilighted )
1125                                         printw("->  ");
1126                                 else
1127                                         printw("    ");
1128                                 break;
1129                         case 1:
1130                                 printw("SLD ");
1131                                 break;
1132
1133                         default:
1134                         case -1:
1135                                 printw("ERR ");
1136                                 break;
1137                         }
1138
1139                         printw("%-*.*s", nameWidth, nameWidth, name);
1140
1141                         printw(" %4i", price);
1142                 }
1143                 else
1144                 {
1145                         printw("-- %-*.*s ", Width-4, Width-4, name);
1146                 }
1147         }
1148
1149         // If the item isn't availiable for sale, return -1 (so it's skipped)
1150         if( status || (price > giUserBalance && gbDisallowSelectWithoutBalance) )
1151                 Index = -1;
1152
1153         return Index;
1154 }
1155
1156 /**
1157  * \brief Print a three-part string at the specified position (formatted)
1158  * \note NCurses UI Helper
1159  *
1160  * Prints \a Left on the left of the area, \a Right on the righthand side
1161  * and \a Mid in the middle of the area. These are padded with \a Pad1
1162  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
1163  *
1164  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
1165  * and the arguments to these are read in that order.
1166  */
1167 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
1168         const char *Mid, char Pad2, const char *Right, ...)
1169 {
1170          int    lLen, mLen, rLen;
1171          int    times;
1172
1173         va_list args;
1174
1175         // Get the length of the strings
1176         va_start(args, Right);
1177         lLen = vsnprintf(NULL, 0, Left, args);
1178         mLen = vsnprintf(NULL, 0, Mid, args);
1179         rLen = vsnprintf(NULL, 0, Right, args);
1180         va_end(args);
1181
1182         // Sanity check
1183         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
1184                 return ;        // TODO: What to do?
1185         }
1186
1187         move(Row, Col);
1188
1189         // Render strings
1190         va_start(args, Right);
1191         // - Left
1192         {
1193                 char    tmp[lLen+1];
1194                 vsnprintf(tmp, lLen+1, Left, args);
1195                 addstr(tmp);
1196         }
1197         // - Left padding
1198         times = (Width - mLen)/2 - lLen;
1199         while(times--)  addch(Pad1);
1200         // - Middle
1201         {
1202                 char    tmp[mLen+1];
1203                 vsnprintf(tmp, mLen+1, Mid, args);
1204                 addstr(tmp);
1205         }
1206         // - Right Padding
1207         times = (Width - mLen)/2 - rLen;
1208         if( (Width - mLen) % 2 )        times ++;
1209         while(times--)  addch(Pad2);
1210         // - Right
1211         {
1212                 char    tmp[rLen+1];
1213                 vsnprintf(tmp, rLen+1, Right, args);
1214                 addstr(tmp);
1215         }
1216 }
1217
1218 // ---------------------
1219 // --- Coke Protocol ---
1220 // ---------------------
1221 int OpenConnection(const char *Host, int Port)
1222 {
1223         struct hostent  *host;
1224         struct sockaddr_in      serverAddr;
1225          int    sock;
1226
1227         host = gethostbyname(Host);
1228         if( !host ) {
1229                 fprintf(stderr, "Unable to look up '%s'\n", Host);
1230                 return -1;
1231         }
1232
1233         memset(&serverAddr, 0, sizeof(serverAddr));
1234
1235         serverAddr.sin_family = AF_INET;        // IPv4
1236         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
1237         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
1238         serverAddr.sin_port = htons(Port);
1239
1240         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
1241         if( sock < 0 ) {
1242                 fprintf(stderr, "Failed to create socket\n");
1243                 return -1;
1244         }
1245
1246 //      printf("geteuid() = %i, getuid() = %i\n", geteuid(), getuid());
1247
1248         if( geteuid() == 0 || getuid() == 0 )
1249         {
1250                  int    i;
1251                 struct sockaddr_in      localAddr;
1252                 memset(&localAddr, 0, sizeof(localAddr));
1253                 localAddr.sin_family = AF_INET; // IPv4
1254
1255                 // Loop through all the top ports until one is avaliable
1256                 for( i = 512; i < 1024; i ++)
1257                 {
1258                         localAddr.sin_port = htons(i);  // IPv4
1259                         // Attempt to bind to low port for autoauth
1260                         if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
1261                                 break;
1262                 }
1263                 if( i == 1024 )
1264                         printf("Warning: AUTOAUTH unavaliable\n");
1265 //              else
1266 //                      printf("Bound to 0.0.0.0:%i\n", i);
1267         }
1268
1269         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
1270                 fprintf(stderr, "Failed to connect to server\n");
1271                 return -1;
1272         }
1273
1274         // We're not authenticated if the connection has just opened
1275         gbIsAuthenticated = 0;
1276
1277         return sock;
1278 }
1279
1280 /**
1281  * \brief Authenticate with the server
1282  * \return Boolean Failure
1283  */
1284 int Authenticate(int Socket)
1285 {
1286         struct passwd   *pwd;
1287         char    *buf;
1288          int    responseCode;
1289         #if ATTEMPT_PASSWORD_AUTH
1290         char    salt[32];
1291          int    i;
1292         regmatch_t      matches[4];
1293         #endif
1294
1295         if( gbIsAuthenticated ) return 0;
1296
1297         // Get user name
1298         pwd = getpwuid( getuid() );
1299
1300         // Attempt automatic authentication
1301         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
1302
1303         // Check if it worked
1304         buf = ReadLine(Socket);
1305
1306         responseCode = atoi(buf);
1307         switch( responseCode )
1308         {
1309         case 200:       // Autoauth succeeded, return
1310                 free(buf);
1311                 break;
1312
1313         case 401:       // Untrusted, attempt password authentication
1314                 free(buf);
1315
1316                 #if ATTEMPT_PASSWORD_AUTH
1317                 sendf(Socket, "USER %s\n", pwd->pw_name);
1318                 printf("Using username %s\n", pwd->pw_name);
1319
1320                 buf = ReadLine(Socket);
1321
1322                 // TODO: Get Salt
1323                 // Expected format: 100 SALT <something> ...
1324                 // OR             : 100 User Set
1325                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
1326                 responseCode = atoi(buf);
1327                 if( responseCode != 100 ) {
1328                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1329                         free(buf);
1330                         return RV_UNKNOWN_ERROR;        // ERROR
1331                 }
1332
1333                 // Check for salt
1334                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
1335                         // Store it for later
1336                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
1337                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
1338                 }
1339                 free(buf);
1340
1341                 // Give three attempts
1342                 for( i = 0; i < 3; i ++ )
1343                 {
1344                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
1345                         char    tmpBuf[42];
1346                         char    tmp[ofs+20];
1347                         char    *pass = getpass("Password: ");
1348                         uint8_t h[20];
1349
1350                         // Create hash string
1351                         // <username><salt><hash>
1352                         strcpy(tmp, pwd->pw_name);
1353                         strcat(tmp, salt);
1354                         SHA1( (unsigned char*)pass, strlen(pass), h );
1355                         memcpy(tmp+ofs, h, 20);
1356
1357                         // Hash all that
1358                         SHA1( (unsigned char*)tmp, ofs+20, h );
1359                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1360                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
1361                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
1362                                 );
1363
1364                         // Send password
1365                         sendf(Socket, "PASS %s\n", tmpBuf);
1366                         buf = ReadLine(Socket);
1367
1368                         responseCode = atoi(buf);
1369                         // Auth OK?
1370                         if( responseCode == 200 )       break;
1371                         // Bad username/password
1372                         if( responseCode == 401 )       continue;
1373
1374                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1375                         free(buf);
1376                         return RV_UNKNOWN_ERROR;
1377                 }
1378                 free(buf);
1379                 if( i == 3 )
1380                         return RV_INVALID_USER; // 2 = Bad Password
1381
1382                 #else
1383                 fprintf(stderr, "Untrusted host, AUTOAUTH unavaliable\n");
1384                 return RV_INVALID_USER;
1385                 #endif
1386                 break;
1387
1388         case 404:       // Bad Username
1389                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
1390                 free(buf);
1391                 return RV_INVALID_USER;
1392
1393         default:
1394                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1395                 printf("%s\n", buf);
1396                 free(buf);
1397                 return RV_UNKNOWN_ERROR;
1398         }
1399
1400         // Set effective user
1401         if( gsEffectiveUser ) {
1402                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
1403
1404                 buf = ReadLine(Socket);
1405                 responseCode = atoi(buf);
1406
1407                 switch(responseCode)
1408                 {
1409                 case 200:
1410                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
1411                         break;
1412
1413                 case 403:
1414                         printf("Only coke members can use `dispense -u`\n");
1415                         free(buf);
1416                         return RV_PERMISSIONS;
1417
1418                 case 404:
1419                         printf("Invalid user selected\n");
1420                         free(buf);
1421                         return RV_INVALID_USER;
1422
1423                 default:
1424                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1425                         printf("%s\n", buf);
1426                         free(buf);
1427                         return RV_UNKNOWN_ERROR;
1428                 }
1429
1430                 free(buf);
1431         }
1432
1433         gbIsAuthenticated = 1;
1434
1435         return 0;
1436 }
1437
1438 int GetUserBalance(int Socket)
1439 {
1440         regmatch_t      matches[6];
1441         struct passwd   *pwd;
1442         char    *buf;
1443          int    responseCode;
1444
1445         if( !gsUserName )
1446         {
1447                 if( gsEffectiveUser ) {
1448                         gsUserName = gsEffectiveUser;
1449                 }
1450                 else {
1451                         pwd = getpwuid( getuid() );
1452                         gsUserName = strdup(pwd->pw_name);
1453                 }
1454         }
1455
1456         sendf(Socket, "USER_INFO %s\n", gsUserName);
1457         buf = ReadLine(Socket);
1458         responseCode = atoi(buf);
1459         switch(responseCode)
1460         {
1461         case 202:       break;  // Ok
1462
1463         case 404:
1464                 printf("Invalid user? (USER_INFO failed)\n");
1465                 free(buf);
1466                 return RV_INVALID_USER;
1467
1468         default:
1469                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1470                 printf("%s\n", buf);
1471                 free(buf);
1472                 return RV_UNKNOWN_ERROR;
1473         }
1474
1475         RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
1476
1477         giUserBalance = atoi( buf + matches[4].rm_so );
1478         gsUserFlags = strdup( buf + matches[5].rm_so );
1479
1480         free(buf);
1481
1482         return 0;
1483 }
1484
1485 /**
1486  * \brief Read an item info response from the server
1487  * \param Dest  Destination for the read item (strings will be on the heap)
1488  */
1489 int ReadItemInfo(int Socket, tItem *Dest)
1490 {
1491         char    *buf;
1492          int    responseCode;
1493
1494         regmatch_t      matches[8];
1495         char    *statusStr;
1496
1497         // Get item info
1498         buf = ReadLine(Socket);
1499         responseCode = atoi(buf);
1500
1501         switch(responseCode)
1502         {
1503         case 202:       break;
1504
1505         case 406:
1506                 printf("Bad item name\n");
1507                 free(buf);
1508                 return RV_BAD_ITEM;
1509
1510         default:
1511                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n%s", responseCode, buf);
1512                 free(buf);
1513                 return RV_UNKNOWN_ERROR;
1514         }
1515
1516         RunRegex(&gItemRegex, buf, 8, matches, "Malformed server response");
1517
1518         buf[ matches[3].rm_eo ] = '\0';
1519         buf[ matches[5].rm_eo ] = '\0';
1520         buf[ matches[7].rm_eo ] = '\0';
1521
1522         statusStr = &buf[ matches[5].rm_so ];
1523
1524         Dest->ID = atoi( buf + matches[4].rm_so );
1525
1526         if( strcmp(statusStr, "avail") == 0 )
1527                 Dest->Status = 0;
1528         else if( strcmp(statusStr, "sold") == 0 )
1529                 Dest->Status = 1;
1530         else if( strcmp(statusStr, "error") == 0 )
1531                 Dest->Status = -1;
1532         else {
1533                 fprintf(stderr, "Unknown response from dispense server (status '%s')\n",
1534                         statusStr);
1535                 return RV_UNKNOWN_ERROR;
1536         }
1537         Dest->Price = atoi( buf + matches[6].rm_so );
1538
1539         // Hack a little to reduce heap fragmentation
1540         {
1541                 char    tmpType[strlen(buf + matches[3].rm_so) + 1];
1542                 char    tmpDesc[strlen(buf + matches[7].rm_so) + 1];
1543                 strcpy(tmpType, buf + matches[3].rm_so);
1544                 strcpy(tmpDesc, buf + matches[7].rm_so);
1545                 free(buf);
1546                 Dest->Type = strdup( tmpType );
1547                 Dest->Desc = strdup( tmpDesc );
1548         }
1549
1550         return 0;
1551 }
1552
1553 /**
1554  * \brief Fill the item information structure
1555  * \return Boolean Failure
1556  */
1557 void PopulateItemList(int Socket)
1558 {
1559         char    *buf;
1560          int    responseCode;
1561
1562         char    *arrayType;
1563          int    count, i;
1564         regmatch_t      matches[4];
1565
1566         // Ask server for stock list
1567         send(Socket, "ENUM_ITEMS\n", 11, 0);
1568         buf = ReadLine(Socket);
1569
1570         //printf("Output: %s\n", buf);
1571
1572         responseCode = atoi(buf);
1573         if( responseCode != 201 ) {
1574                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1575                 exit(RV_UNKNOWN_ERROR);
1576         }
1577
1578         // - Get item list -
1579
1580         // Expected format:
1581         //  201 Items <count>
1582         //  202 Item <count>
1583         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1584
1585         arrayType = &buf[ matches[2].rm_so ];   buf[ matches[2].rm_eo ] = '\0';
1586         count = atoi( &buf[ matches[3].rm_so ] );
1587
1588         // Check array type
1589         if( strcmp(arrayType, "Items") != 0 ) {
1590                 // What the?!
1591                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
1592                         arrayType);
1593                 exit(RV_UNKNOWN_ERROR);
1594         }
1595         free(buf);
1596
1597         giNumItems = count;
1598         gaItems = malloc( giNumItems * sizeof(tItem) );
1599
1600         // Fetch item information
1601         for( i = 0; i < giNumItems; i ++ )
1602         {
1603                 ReadItemInfo( Socket, &gaItems[i] );
1604         }
1605
1606         // Read end of list
1607         buf = ReadLine(Socket);
1608         responseCode = atoi(buf);
1609
1610         if( responseCode != 200 ) {
1611                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
1612                         responseCode, buf
1613                         );
1614                 exit(-1);
1615         }
1616
1617         free(buf);
1618 }
1619
1620
1621 /**
1622  * \brief Get information on an item
1623  * \return Boolean Failure
1624  */
1625 int Dispense_ItemInfo(int Socket, const char *Type, int ID)
1626 {
1627         tItem   item;
1628          int    ret;
1629
1630         // Query
1631         sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
1632
1633         ret = ReadItemInfo(Socket, &item);
1634         if(ret) return ret;
1635
1636         printf("%8s:%-2i %2i.%02i %s\n",
1637                 item.Type, item.ID,
1638                 item.Price/100, item.Price%100,
1639                 item.Desc);
1640
1641         free(item.Type);
1642         free(item.Desc);
1643
1644         return 0;
1645 }
1646
1647 /**
1648  * \brief Dispense an item
1649  * \return Boolean Failure
1650  */
1651 int DispenseItem(int Socket, const char *Type, int ID)
1652 {
1653          int    ret, responseCode;
1654         char    *buf;
1655
1656         // Check for a dry run
1657         if( gbDryRun ) {
1658                 printf("Dry Run - No action\n");
1659                 return 0;
1660         }
1661
1662         // Dispense!
1663         sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
1664         buf = ReadLine(Socket);
1665
1666         responseCode = atoi(buf);
1667         switch( responseCode )
1668         {
1669         case 200:
1670                 printf("Dispense OK\n");
1671                 ret = 0;
1672                 break;
1673         case 401:
1674                 printf("Not authenticated\n");
1675                 ret = RV_PERMISSIONS;
1676                 break;
1677         case 402:
1678                 printf("Insufficient balance\n");
1679                 ret = RV_BALANCE;
1680                 break;
1681         case 406:
1682                 printf("Bad item name\n");
1683                 ret = RV_BAD_ITEM;
1684                 break;
1685         case 500:
1686                 printf("Item failed to dispense, is the slot empty?\n");
1687                 ret = RV_SERVER_ERROR;
1688                 break;
1689         case 501:
1690                 printf("Dispense not possible (slot empty/permissions)\n");
1691                 ret = RV_SERVER_ERROR;
1692                 break;
1693         default:
1694                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1695                 ret = RV_UNKNOWN_ERROR;
1696                 break;
1697         }
1698
1699         free(buf);
1700         return ret;
1701 }
1702
1703 /**
1704  * \brief Alter a user's balance
1705  */
1706 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
1707 {
1708         char    *buf;
1709          int    responseCode, rv = -1;
1710
1711         // Check for a dry run
1712         if( gbDryRun ) {
1713                 printf("Dry Run - No action\n");
1714                 return 0;
1715         }
1716
1717         // Sanity
1718         if( Ammount == 0 ) {
1719                 printf("An ammount would be nice\n");
1720                 return RV_ARGUMENTS;
1721         }
1722
1723         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
1724         buf = ReadLine(Socket);
1725
1726         responseCode = atoi(buf);
1727
1728         switch(responseCode)
1729         {
1730         case 200:
1731                 rv = 0; // OK
1732                 break;
1733         case 402:
1734                 fprintf(stderr, "Insufficient balance\n");
1735                 rv = RV_BAD_ITEM;
1736                 break;
1737         case 403:       // Not in coke
1738                 fprintf(stderr, "You are not in coke (sucker)\n");
1739                 rv = RV_PERMISSIONS;
1740                 break;
1741         case 404:       // Unknown user
1742                 fprintf(stderr, "Unknown user '%s'\n", Username);
1743                 rv = RV_INVALID_USER;
1744                 break;
1745         default:
1746                 fprintf(stderr, "Unknown response code %i\n'%s'\n", responseCode, buf);
1747                 rv = RV_UNKNOWN_RESPONSE;
1748                 break;
1749         }
1750         free(buf);
1751
1752         return rv;
1753 }
1754
1755 /**
1756  * \brief Set a user's balance
1757  * \note Only avaliable to dispense admins
1758  */
1759 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1760 {
1761         char    *buf;
1762          int    responseCode;
1763
1764         // Check for a dry run
1765         if( gbDryRun ) {
1766                 printf("Dry Run - No action\n");
1767                 return 0;
1768         }
1769
1770         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1771         buf = ReadLine(Socket);
1772
1773         responseCode = atoi(buf);
1774         free(buf);
1775
1776         switch(responseCode)
1777         {
1778         case 200:       return 0;       // OK
1779         case 403:       // Not in coke
1780                 fprintf(stderr, "You are not an admin\n");
1781                 return RV_PERMISSIONS;
1782         case 404:       // Unknown user
1783                 fprintf(stderr, "Unknown user '%s'\n", Username);
1784                 return RV_INVALID_USER;
1785         default:
1786                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1787                 return RV_UNKNOWN_RESPONSE;
1788         }
1789
1790         return -1;
1791 }
1792
1793 /**
1794  * \brief Give money to another user
1795  */
1796 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1797 {
1798         char    *buf;
1799          int    responseCode;
1800
1801         if( Ammount < 0 ) {
1802                 printf("Sorry, you can only give, you can't take.\n");
1803                 return RV_ARGUMENTS;
1804         }
1805
1806         // Fast return on zero
1807         if( Ammount == 0 ) {
1808                 printf("Are you actually going to give any?\n");
1809                 return RV_ARGUMENTS;
1810         }
1811
1812         // Check for a dry run
1813         if( gbDryRun ) {
1814                 printf("Dry Run - No action\n");
1815                 return 0;
1816         }
1817
1818         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1819
1820         buf = ReadLine(Socket);
1821         responseCode = atoi(buf);
1822         free(buf);
1823         switch(responseCode)
1824         {
1825         case 200:
1826                 printf("Give succeeded\n");
1827                 return RV_SUCCESS;      // OK
1828
1829         case 402:
1830                 fprintf(stderr, "Insufficient balance\n");
1831                 return RV_BALANCE;
1832
1833         case 404:       // Unknown user
1834                 fprintf(stderr, "Unknown user '%s'\n", Username);
1835                 return RV_INVALID_USER;
1836
1837         default:
1838                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1839                 return RV_UNKNOWN_RESPONSE;
1840         }
1841
1842         return -1;
1843 }
1844
1845 int Dispense_Refund(int Socket, const char *Username, const char *Item, int PriceOverride)
1846 {
1847         char    *buf;
1848          int    responseCode, ret = -1;
1849
1850         // Check item id
1851         if( RunRegex(&gUserItemIdentRegex, Item, 0, NULL, NULL) != 0 )
1852         {
1853                 fprintf(stderr, "Error: Invalid item ID passed (should be <type>:<num>)\n");
1854                 return RV_ARGUMENTS;
1855         }
1856
1857         // Check username (quick)
1858         if( strchr(Username, ' ') || strchr(Username, '\n') )
1859         {
1860                 fprintf(stderr, "Error: Username is invalid (no spaces or newlines please)\n");
1861                 return RV_ARGUMENTS;
1862         }
1863
1864         // Send the query
1865         sendf(Socket, "REFUND %s %s %i\n", Username, Item, PriceOverride);
1866
1867         buf = ReadLine(Socket);
1868         responseCode = atoi(buf);
1869         switch(responseCode)
1870         {
1871         case 200:
1872                 Dispense_ShowUser(Socket, Username);    // Show destination account
1873                 ret = 0;
1874                 break;
1875         case 403:
1876                 fprintf(stderr, "Refund access is only avaliable to coke members\n");
1877                 ret = RV_PERMISSIONS;
1878                 break;
1879         case 404:
1880                 fprintf(stderr, "Unknown user '%s' passed\n", Username);
1881                 ret = RV_INVALID_USER;
1882                 break;
1883         case 406:
1884                 fprintf(stderr, "Invalid item '%s' passed\n", Item);
1885                 ret = RV_BAD_ITEM;
1886                 break;
1887         default:
1888                 fprintf(stderr, "Unknown response from server %i\n%s\n", responseCode, buf);
1889                 ret = -1;
1890                 break;
1891         }
1892         free(buf);
1893         return ret;
1894 }
1895
1896 /**
1897  * \brief Donate money to the club
1898  */
1899 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1900 {
1901         char    *buf;
1902          int    responseCode;
1903
1904         if( Ammount < 0 ) {
1905                 printf("Sorry, you can only give, you can't take.\n");
1906                 return -1;
1907         }
1908
1909         // Fast return on zero
1910         if( Ammount == 0 ) {
1911                 printf("Are you actually going to give any?\n");
1912                 return 1;
1913         }
1914
1915         // Check for a dry run
1916         if( gbDryRun ) {
1917                 printf("Dry Run - No action\n");
1918                 return 0;
1919         }
1920
1921         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1922         buf = ReadLine(Socket);
1923
1924         responseCode = atoi(buf);
1925         free(buf);
1926
1927         switch(responseCode)
1928         {
1929         case 200:       return 0;       // OK
1930
1931         case 402:
1932                 fprintf(stderr, "Insufficient balance\n");
1933                 return 1;
1934
1935         default:
1936                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1937                 return -1;
1938         }
1939
1940         return -1;
1941 }
1942
1943 /**
1944  * \brief Enumerate users
1945  */
1946 int Dispense_EnumUsers(int Socket)
1947 {
1948         char    *buf;
1949          int    responseCode;
1950          int    nUsers;
1951         regmatch_t      matches[4];
1952
1953         if( giMinimumBalance != INT_MIN ) {
1954                 if( giMaximumBalance != INT_MAX ) {
1955                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1956                 }
1957                 else {
1958                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1959                 }
1960         }
1961         else {
1962                 if( giMaximumBalance != INT_MAX ) {
1963                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
1964                 }
1965                 else {
1966                         sendf(Socket, "ENUM_USERS\n");
1967                 }
1968         }
1969         buf = ReadLine(Socket);
1970         responseCode = atoi(buf);
1971
1972         switch(responseCode)
1973         {
1974         case 201:       break;  // Ok, length follows
1975
1976         default:
1977                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1978                 free(buf);
1979                 return -1;
1980         }
1981
1982         // Get count (not actually used)
1983         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1984         nUsers = atoi( buf + matches[3].rm_so );
1985         printf("%i users returned\n", nUsers);
1986
1987         // Free string
1988         free(buf);
1989
1990         // Read returned users
1991         do {
1992                 buf = ReadLine(Socket);
1993                 responseCode = atoi(buf);
1994
1995                 if( responseCode != 202 )       break;
1996
1997                 _PrintUserLine(buf);
1998                 free(buf);
1999         } while(responseCode == 202);
2000
2001         // Check final response
2002         if( responseCode != 200 ) {
2003                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
2004                 free(buf);
2005                 return -1;
2006         }
2007
2008         free(buf);
2009
2010         return 0;
2011 }
2012
2013 int Dispense_ShowUser(int Socket, const char *Username)
2014 {
2015         char    *buf;
2016          int    responseCode, ret;
2017
2018         sendf(Socket, "USER_INFO %s\n", Username);
2019         buf = ReadLine(Socket);
2020
2021         responseCode = atoi(buf);
2022
2023         switch(responseCode)
2024         {
2025         case 202:
2026                 _PrintUserLine(buf);
2027                 ret = 0;
2028                 break;
2029
2030         case 404:
2031                 printf("Unknown user '%s'\n", Username);
2032                 ret = 1;
2033                 break;
2034
2035         default:
2036                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2037                 ret = -1;
2038                 break;
2039         }
2040
2041         free(buf);
2042
2043         return ret;
2044 }
2045
2046 void _PrintUserLine(const char *Line)
2047 {
2048         regmatch_t      matches[6];
2049          int    bal;
2050
2051         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
2052         // 3: Username
2053         // 4: Balance
2054         // 5: Flags
2055         {
2056                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
2057                 char    username[usernameLen + 1];
2058                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
2059                 char    flags[flagsLen + 1];
2060
2061                 memcpy(username, Line + matches[3].rm_so, usernameLen);
2062                 username[usernameLen] = '\0';
2063                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
2064                 flags[flagsLen] = '\0';
2065
2066                 bal = atoi(Line + matches[4].rm_so);
2067                 printf("%-15s: $%8.02f (%s)\n", username, ((float)bal)/100, flags);
2068         }
2069 }
2070
2071 int Dispense_AddUser(int Socket, const char *Username)
2072 {
2073         char    *buf;
2074          int    responseCode, ret;
2075
2076         // Check for a dry run
2077         if( gbDryRun ) {
2078                 printf("Dry Run - No action\n");
2079                 return 0;
2080         }
2081
2082         sendf(Socket, "USER_ADD %s\n", Username);
2083
2084         buf = ReadLine(Socket);
2085         responseCode = atoi(buf);
2086
2087         switch(responseCode)
2088         {
2089         case 200:
2090                 printf("User '%s' added\n", Username);
2091                 ret = 0;
2092                 break;
2093
2094         case 403:
2095                 printf("Only wheel can add users\n");
2096                 ret = 1;
2097                 break;
2098
2099         case 404:
2100                 printf("User '%s' already exists\n", Username);
2101                 ret = 0;
2102                 break;
2103
2104         default:
2105                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2106                 ret = -1;
2107                 break;
2108         }
2109
2110         free(buf);
2111
2112         return ret;
2113 }
2114
2115 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString, const char *Reason)
2116 {
2117         char    *buf;
2118          int    responseCode, ret;
2119
2120         // Check for a dry run
2121         if( gbDryRun ) {
2122                 printf("Dry Run - No action\n");
2123                 return 0;
2124         }
2125
2126         // TODO: Pre-validate the string
2127
2128         sendf(Socket, "USER_FLAGS %s %s %s\n", Username, TypeString, Reason);
2129
2130         buf = ReadLine(Socket);
2131         responseCode = atoi(buf);
2132
2133         switch(responseCode)
2134         {
2135         case 200:
2136                 printf("User '%s' updated\n", Username);
2137                 ret = 0;
2138                 break;
2139
2140         case 403:
2141                 printf("Only dispense admins can modify users\n");
2142                 ret = RV_PERMISSIONS;
2143                 break;
2144
2145         case 404:
2146                 printf("User '%s' does not exist\n", Username);
2147                 ret = RV_INVALID_USER;
2148                 break;
2149
2150         case 407:
2151                 printf("Flag string is invalid\n");
2152                 ret = RV_ARGUMENTS;
2153                 break;
2154
2155         default:
2156                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2157                 ret = RV_UNKNOWN_RESPONSE;
2158                 break;
2159         }
2160
2161         free(buf);
2162
2163         return ret;
2164 }
2165
2166 int Dispense_SetItem(int Socket, const char *Type, int ID, int NewPrice, const char *NewName)
2167 {
2168         char    *buf;
2169          int    responseCode, ret;
2170
2171         // Check for a dry run
2172         if( gbDryRun ) {
2173                 printf("Dry Run - No action\n");
2174                 return 0;
2175         }
2176
2177         sendf(Socket, "UPDATE_ITEM %s:%i %i %s\n", Type, ID, NewPrice, NewName);
2178
2179         buf = ReadLine(Socket);
2180         responseCode = atoi(buf);
2181
2182         switch(responseCode)
2183         {
2184         case 200:
2185                 printf("Item %s:%i updated\n", Type, ID);
2186                 ret = 0;
2187                 break;
2188
2189         case 403:
2190                 printf("Only coke members can modify the slots\n");
2191                 ret = RV_PERMISSIONS;
2192                 break;
2193
2194         case 406:
2195                 printf("Invalid item passed\n");
2196                 ret = RV_BAD_ITEM;
2197                 break;
2198
2199         default:
2200                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2201                 ret = -1;
2202                 break;
2203         }
2204
2205         free(buf);
2206
2207         return ret;
2208 }
2209
2210 // ---------------
2211 // --- Helpers ---
2212 // ---------------
2213 char *ReadLine(int Socket)
2214 {
2215         static char     buf[BUFSIZ];
2216         static int      bufPos = 0;
2217         static int      bufValid = 0;
2218          int    len;
2219         char    *newline = NULL;
2220          int    retLen = 0;
2221         char    *ret = malloc(10);
2222
2223         #if DEBUG_TRACE_SERVER
2224         printf("ReadLine: ");
2225         fflush(stdout);
2226         #endif
2227
2228         ret[0] = '\0';
2229
2230         while( !newline )
2231         {
2232                 if( bufValid ) {
2233                         len = bufValid;
2234                 }
2235                 else {
2236                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
2237                         if( len <= 0 ) {
2238                                 free(ret);
2239                                 return strdup("599 Client Connection Error\n");
2240                         }
2241                 }
2242                 buf[bufPos+len] = '\0';
2243
2244                 newline = strchr( buf+bufPos, '\n' );
2245                 if( newline ) {
2246                         *newline = '\0';
2247                 }
2248
2249                 retLen += strlen(buf+bufPos);
2250                 ret = realloc(ret, retLen + 1);
2251                 strcat( ret, buf+bufPos );
2252
2253                 if( newline ) {
2254                          int    newLen = newline - (buf+bufPos) + 1;
2255                         bufValid = len - newLen;
2256                         len = newLen;
2257                 }
2258                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
2259                 else    bufPos += len;
2260         }
2261
2262         #if DEBUG_TRACE_SERVER
2263         printf("%i '%s'\n", retLen, ret);
2264         #endif
2265
2266         return ret;
2267 }
2268
2269 int sendf(int Socket, const char *Format, ...)
2270 {
2271         va_list args;
2272          int    len;
2273
2274         va_start(args, Format);
2275         len = vsnprintf(NULL, 0, Format, args);
2276         va_end(args);
2277
2278         {
2279                 char    buf[len+1];
2280                 va_start(args, Format);
2281                 vsnprintf(buf, len+1, Format, args);
2282                 va_end(args);
2283
2284                 #if DEBUG_TRACE_SERVER
2285                 printf("sendf: %s", buf);
2286                 #endif
2287
2288                 return send(Socket, buf, len, 0);
2289         }
2290 }
2291
2292 char *trim(char *string)
2293 {
2294          int    i;
2295
2296         while( isspace(*string) )
2297                 string ++;
2298
2299         for( i = strlen(string); i--; )
2300         {
2301                 if( isspace(string[i]) )
2302                         string[i] = '\0';
2303                 else
2304                         break;
2305         }
2306
2307         return string;
2308 }
2309
2310 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
2311 {
2312          int    ret;
2313
2314         ret = regexec(regex, string, nMatches, matches, 0);
2315         if( ret && errorMessage ) {
2316                 size_t  len = regerror(ret, regex, NULL, 0);
2317                 char    errorStr[len];
2318                 regerror(ret, regex, errorStr, len);
2319                 printf("string = '%s'\n", string);
2320                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
2321                 exit(-1);
2322         }
2323
2324         return ret;
2325 }
2326
2327 void CompileRegex(regex_t *regex, const char *pattern, int flags)
2328 {
2329          int    ret = regcomp(regex, pattern, flags);
2330         if( ret ) {
2331                 size_t  len = regerror(ret, regex, NULL, 0);
2332                 char    errorStr[len];
2333                 regerror(ret, regex, errorStr, len);
2334                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
2335                 exit(-1);
2336         }
2337 }