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 = 40;
 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 - 5;
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                         if( price > 100*100 ) {
1140                                 nameWidth --;
1141                         }
1142                         if( price > 1000*100 ) {
1143                                 nameWidth --;
1144                         }
1145
1146                         printw("%-*.*s", nameWidth, nameWidth, name);
1147
1148                         // 99.99 should be enough
1149                         printw(" %4i", price);
1150                 }
1151                 else
1152                 {
1153                         printw("-- %-*.*s ", Width-4, Width-4, name);
1154                 }
1155         }
1156
1157         // If the item isn't availiable for sale, return -1 (so it's skipped)
1158         if( status || (price > giUserBalance && gbDisallowSelectWithoutBalance) )
1159                 Index = -1;
1160
1161         return Index;
1162 }
1163
1164 /**
1165  * \brief Print a three-part string at the specified position (formatted)
1166  * \note NCurses UI Helper
1167  *
1168  * Prints \a Left on the left of the area, \a Right on the righthand side
1169  * and \a Mid in the middle of the area. These are padded with \a Pad1
1170  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
1171  *
1172  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
1173  * and the arguments to these are read in that order.
1174  */
1175 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
1176         const char *Mid, char Pad2, const char *Right, ...)
1177 {
1178          int    lLen, mLen, rLen;
1179          int    times;
1180
1181         va_list args;
1182
1183         // Get the length of the strings
1184         va_start(args, Right);
1185         lLen = vsnprintf(NULL, 0, Left, args);
1186         mLen = vsnprintf(NULL, 0, Mid, args);
1187         rLen = vsnprintf(NULL, 0, Right, args);
1188         va_end(args);
1189
1190         // Sanity check
1191         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
1192                 return ;        // TODO: What to do?
1193         }
1194
1195         move(Row, Col);
1196
1197         // Render strings
1198         va_start(args, Right);
1199         // - Left
1200         {
1201                 char    tmp[lLen+1];
1202                 vsnprintf(tmp, lLen+1, Left, args);
1203                 addstr(tmp);
1204         }
1205         // - Left padding
1206         times = (Width - mLen)/2 - lLen;
1207         while(times--)  addch(Pad1);
1208         // - Middle
1209         {
1210                 char    tmp[mLen+1];
1211                 vsnprintf(tmp, mLen+1, Mid, args);
1212                 addstr(tmp);
1213         }
1214         // - Right Padding
1215         times = (Width - mLen)/2 - rLen;
1216         if( (Width - mLen) % 2 )        times ++;
1217         while(times--)  addch(Pad2);
1218         // - Right
1219         {
1220                 char    tmp[rLen+1];
1221                 vsnprintf(tmp, rLen+1, Right, args);
1222                 addstr(tmp);
1223         }
1224 }
1225
1226 // ---------------------
1227 // --- Coke Protocol ---
1228 // ---------------------
1229 int OpenConnection(const char *Host, int Port)
1230 {
1231         struct hostent  *host;
1232         struct sockaddr_in      serverAddr;
1233          int    sock;
1234
1235         host = gethostbyname(Host);
1236         if( !host ) {
1237                 fprintf(stderr, "Unable to look up '%s'\n", Host);
1238                 return -1;
1239         }
1240
1241         memset(&serverAddr, 0, sizeof(serverAddr));
1242
1243         serverAddr.sin_family = AF_INET;        // IPv4
1244         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
1245         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
1246         serverAddr.sin_port = htons(Port);
1247
1248         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
1249         if( sock < 0 ) {
1250                 fprintf(stderr, "Failed to create socket\n");
1251                 return -1;
1252         }
1253
1254 //      printf("geteuid() = %i, getuid() = %i\n", geteuid(), getuid());
1255
1256         if( geteuid() == 0 || getuid() == 0 )
1257         {
1258                  int    i;
1259                 struct sockaddr_in      localAddr;
1260                 memset(&localAddr, 0, sizeof(localAddr));
1261                 localAddr.sin_family = AF_INET; // IPv4
1262
1263                 // Loop through all the top ports until one is avaliable
1264                 for( i = 512; i < 1024; i ++)
1265                 {
1266                         localAddr.sin_port = htons(i);  // IPv4
1267                         // Attempt to bind to low port for autoauth
1268                         if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
1269                                 break;
1270                 }
1271                 if( i == 1024 )
1272                         printf("Warning: AUTOAUTH unavaliable\n");
1273 //              else
1274 //                      printf("Bound to 0.0.0.0:%i\n", i);
1275         }
1276
1277         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
1278                 fprintf(stderr, "Failed to connect to server\n");
1279                 return -1;
1280         }
1281
1282         // We're not authenticated if the connection has just opened
1283         gbIsAuthenticated = 0;
1284
1285         return sock;
1286 }
1287
1288 /**
1289  * \brief Authenticate with the server
1290  * \return Boolean Failure
1291  */
1292 int Authenticate(int Socket)
1293 {
1294         struct passwd   *pwd;
1295         char    *buf;
1296          int    responseCode;
1297         #if ATTEMPT_PASSWORD_AUTH
1298         char    salt[32];
1299          int    i;
1300         regmatch_t      matches[4];
1301         #endif
1302
1303         if( gbIsAuthenticated ) return 0;
1304
1305         // Get user name
1306         pwd = getpwuid( getuid() );
1307
1308         // Attempt automatic authentication
1309         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
1310
1311         // Check if it worked
1312         buf = ReadLine(Socket);
1313
1314         responseCode = atoi(buf);
1315         switch( responseCode )
1316         {
1317         case 200:       // Autoauth succeeded, return
1318                 free(buf);
1319                 break;
1320
1321         case 401:       // Untrusted, attempt password authentication
1322                 free(buf);
1323
1324                 #if ATTEMPT_PASSWORD_AUTH
1325                 sendf(Socket, "USER %s\n", pwd->pw_name);
1326                 printf("Using username %s\n", pwd->pw_name);
1327
1328                 buf = ReadLine(Socket);
1329
1330                 // TODO: Get Salt
1331                 // Expected format: 100 SALT <something> ...
1332                 // OR             : 100 User Set
1333                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
1334                 responseCode = atoi(buf);
1335                 if( responseCode != 100 ) {
1336                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1337                         free(buf);
1338                         return RV_UNKNOWN_ERROR;        // ERROR
1339                 }
1340
1341                 // Check for salt
1342                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
1343                         // Store it for later
1344                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
1345                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
1346                 }
1347                 free(buf);
1348
1349                 // Give three attempts
1350                 for( i = 0; i < 3; i ++ )
1351                 {
1352                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
1353                         char    tmpBuf[42];
1354                         char    tmp[ofs+20];
1355                         char    *pass = getpass("Password: ");
1356                         uint8_t h[20];
1357
1358                         // Create hash string
1359                         // <username><salt><hash>
1360                         strcpy(tmp, pwd->pw_name);
1361                         strcat(tmp, salt);
1362                         SHA1( (unsigned char*)pass, strlen(pass), h );
1363                         memcpy(tmp+ofs, h, 20);
1364
1365                         // Hash all that
1366                         SHA1( (unsigned char*)tmp, ofs+20, h );
1367                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1368                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
1369                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
1370                                 );
1371
1372                         // Send password
1373                         sendf(Socket, "PASS %s\n", tmpBuf);
1374                         buf = ReadLine(Socket);
1375
1376                         responseCode = atoi(buf);
1377                         // Auth OK?
1378                         if( responseCode == 200 )       break;
1379                         // Bad username/password
1380                         if( responseCode == 401 )       continue;
1381
1382                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1383                         free(buf);
1384                         return RV_UNKNOWN_ERROR;
1385                 }
1386                 free(buf);
1387                 if( i == 3 )
1388                         return RV_INVALID_USER; // 2 = Bad Password
1389
1390                 #else
1391                 fprintf(stderr, "Untrusted host, AUTOAUTH unavaliable\n");
1392                 return RV_INVALID_USER;
1393                 #endif
1394                 break;
1395
1396         case 404:       // Bad Username
1397                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
1398                 free(buf);
1399                 return RV_INVALID_USER;
1400
1401         default:
1402                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1403                 printf("%s\n", buf);
1404                 free(buf);
1405                 return RV_UNKNOWN_ERROR;
1406         }
1407
1408         // Set effective user
1409         if( gsEffectiveUser ) {
1410                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
1411
1412                 buf = ReadLine(Socket);
1413                 responseCode = atoi(buf);
1414
1415                 switch(responseCode)
1416                 {
1417                 case 200:
1418                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
1419                         break;
1420
1421                 case 403:
1422                         printf("Only coke members can use `dispense -u`\n");
1423                         free(buf);
1424                         return RV_PERMISSIONS;
1425
1426                 case 404:
1427                         printf("Invalid user selected\n");
1428                         free(buf);
1429                         return RV_INVALID_USER;
1430
1431                 default:
1432                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1433                         printf("%s\n", buf);
1434                         free(buf);
1435                         return RV_UNKNOWN_ERROR;
1436                 }
1437
1438                 free(buf);
1439         }
1440
1441         gbIsAuthenticated = 1;
1442
1443         return 0;
1444 }
1445
1446 int GetUserBalance(int Socket)
1447 {
1448         regmatch_t      matches[6];
1449         struct passwd   *pwd;
1450         char    *buf;
1451          int    responseCode;
1452
1453         if( !gsUserName )
1454         {
1455                 if( gsEffectiveUser ) {
1456                         gsUserName = gsEffectiveUser;
1457                 }
1458                 else {
1459                         pwd = getpwuid( getuid() );
1460                         gsUserName = strdup(pwd->pw_name);
1461                 }
1462         }
1463
1464         sendf(Socket, "USER_INFO %s\n", gsUserName);
1465         buf = ReadLine(Socket);
1466         responseCode = atoi(buf);
1467         switch(responseCode)
1468         {
1469         case 202:       break;  // Ok
1470
1471         case 404:
1472                 printf("Invalid user? (USER_INFO failed)\n");
1473                 free(buf);
1474                 return RV_INVALID_USER;
1475
1476         default:
1477                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1478                 printf("%s\n", buf);
1479                 free(buf);
1480                 return RV_UNKNOWN_ERROR;
1481         }
1482
1483         RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
1484
1485         giUserBalance = atoi( buf + matches[4].rm_so );
1486         gsUserFlags = strdup( buf + matches[5].rm_so );
1487
1488         free(buf);
1489
1490         return 0;
1491 }
1492
1493 /**
1494  * \brief Read an item info response from the server
1495  * \param Dest  Destination for the read item (strings will be on the heap)
1496  */
1497 int ReadItemInfo(int Socket, tItem *Dest)
1498 {
1499         char    *buf;
1500          int    responseCode;
1501
1502         regmatch_t      matches[8];
1503         char    *statusStr;
1504
1505         // Get item info
1506         buf = ReadLine(Socket);
1507         responseCode = atoi(buf);
1508
1509         switch(responseCode)
1510         {
1511         case 202:       break;
1512
1513         case 406:
1514                 printf("Bad item name\n");
1515                 free(buf);
1516                 return RV_BAD_ITEM;
1517
1518         default:
1519                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n%s", responseCode, buf);
1520                 free(buf);
1521                 return RV_UNKNOWN_ERROR;
1522         }
1523
1524         RunRegex(&gItemRegex, buf, 8, matches, "Malformed server response");
1525
1526         buf[ matches[3].rm_eo ] = '\0';
1527         buf[ matches[5].rm_eo ] = '\0';
1528         buf[ matches[7].rm_eo ] = '\0';
1529
1530         statusStr = &buf[ matches[5].rm_so ];
1531
1532         Dest->ID = atoi( buf + matches[4].rm_so );
1533
1534         if( strcmp(statusStr, "avail") == 0 )
1535                 Dest->Status = 0;
1536         else if( strcmp(statusStr, "sold") == 0 )
1537                 Dest->Status = 1;
1538         else if( strcmp(statusStr, "error") == 0 )
1539                 Dest->Status = -1;
1540         else {
1541                 fprintf(stderr, "Unknown response from dispense server (status '%s')\n",
1542                         statusStr);
1543                 return RV_UNKNOWN_ERROR;
1544         }
1545         Dest->Price = atoi( buf + matches[6].rm_so );
1546
1547         // Hack a little to reduce heap fragmentation
1548         {
1549                 char    tmpType[strlen(buf + matches[3].rm_so) + 1];
1550                 char    tmpDesc[strlen(buf + matches[7].rm_so) + 1];
1551                 strcpy(tmpType, buf + matches[3].rm_so);
1552                 strcpy(tmpDesc, buf + matches[7].rm_so);
1553                 free(buf);
1554                 Dest->Type = strdup( tmpType );
1555                 Dest->Desc = strdup( tmpDesc );
1556         }
1557
1558         return 0;
1559 }
1560
1561 /**
1562  * \brief Fill the item information structure
1563  * \return Boolean Failure
1564  */
1565 void PopulateItemList(int Socket)
1566 {
1567         char    *buf;
1568          int    responseCode;
1569
1570         char    *arrayType;
1571          int    count, i;
1572         regmatch_t      matches[4];
1573
1574         // Ask server for stock list
1575         send(Socket, "ENUM_ITEMS\n", 11, 0);
1576         buf = ReadLine(Socket);
1577
1578         //printf("Output: %s\n", buf);
1579
1580         responseCode = atoi(buf);
1581         if( responseCode != 201 ) {
1582                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1583                 exit(RV_UNKNOWN_ERROR);
1584         }
1585
1586         // - Get item list -
1587
1588         // Expected format:
1589         //  201 Items <count>
1590         //  202 Item <count>
1591         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1592
1593         arrayType = &buf[ matches[2].rm_so ];   buf[ matches[2].rm_eo ] = '\0';
1594         count = atoi( &buf[ matches[3].rm_so ] );
1595
1596         // Check array type
1597         if( strcmp(arrayType, "Items") != 0 ) {
1598                 // What the?!
1599                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
1600                         arrayType);
1601                 exit(RV_UNKNOWN_ERROR);
1602         }
1603         free(buf);
1604
1605         giNumItems = count;
1606         gaItems = malloc( giNumItems * sizeof(tItem) );
1607
1608         // Fetch item information
1609         for( i = 0; i < giNumItems; i ++ )
1610         {
1611                 ReadItemInfo( Socket, &gaItems[i] );
1612         }
1613
1614         // Read end of list
1615         buf = ReadLine(Socket);
1616         responseCode = atoi(buf);
1617
1618         if( responseCode != 200 ) {
1619                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
1620                         responseCode, buf
1621                         );
1622                 exit(-1);
1623         }
1624
1625         free(buf);
1626 }
1627
1628
1629 /**
1630  * \brief Get information on an item
1631  * \return Boolean Failure
1632  */
1633 int Dispense_ItemInfo(int Socket, const char *Type, int ID)
1634 {
1635         tItem   item;
1636          int    ret;
1637
1638         // Query
1639         sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
1640
1641         ret = ReadItemInfo(Socket, &item);
1642         if(ret) return ret;
1643
1644         printf("%8s:%-2i %2i.%02i %s\n",
1645                 item.Type, item.ID,
1646                 item.Price/100, item.Price%100,
1647                 item.Desc);
1648
1649         free(item.Type);
1650         free(item.Desc);
1651
1652         return 0;
1653 }
1654
1655 /**
1656  * \brief Dispense an item
1657  * \return Boolean Failure
1658  */
1659 int DispenseItem(int Socket, const char *Type, int ID)
1660 {
1661          int    ret, responseCode;
1662         char    *buf;
1663
1664         // Check for a dry run
1665         if( gbDryRun ) {
1666                 printf("Dry Run - No action\n");
1667                 return 0;
1668         }
1669
1670         // Dispense!
1671         sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
1672         buf = ReadLine(Socket);
1673
1674         responseCode = atoi(buf);
1675         switch( responseCode )
1676         {
1677         case 200:
1678                 printf("Dispense OK\n");
1679                 ret = 0;
1680                 break;
1681         case 401:
1682                 printf("Not authenticated\n");
1683                 ret = RV_PERMISSIONS;
1684                 break;
1685         case 402:
1686                 printf("Insufficient balance\n");
1687                 ret = RV_BALANCE;
1688                 break;
1689         case 406:
1690                 printf("Bad item name\n");
1691                 ret = RV_BAD_ITEM;
1692                 break;
1693         case 500:
1694                 printf("Item failed to dispense, is the slot empty?\n");
1695                 ret = RV_SERVER_ERROR;
1696                 break;
1697         case 501:
1698                 printf("Dispense not possible (slot empty/permissions)\n");
1699                 ret = RV_SERVER_ERROR;
1700                 break;
1701         default:
1702                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1703                 ret = RV_UNKNOWN_ERROR;
1704                 break;
1705         }
1706
1707         free(buf);
1708         return ret;
1709 }
1710
1711 /**
1712  * \brief Alter a user's balance
1713  */
1714 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
1715 {
1716         char    *buf;
1717          int    responseCode, rv = -1;
1718
1719         // Check for a dry run
1720         if( gbDryRun ) {
1721                 printf("Dry Run - No action\n");
1722                 return 0;
1723         }
1724
1725         // Sanity
1726         if( Ammount == 0 ) {
1727                 printf("An ammount would be nice\n");
1728                 return RV_ARGUMENTS;
1729         }
1730
1731         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
1732         buf = ReadLine(Socket);
1733
1734         responseCode = atoi(buf);
1735
1736         switch(responseCode)
1737         {
1738         case 200:
1739                 rv = 0; // OK
1740                 break;
1741         case 402:
1742                 fprintf(stderr, "Insufficient balance\n");
1743                 rv = RV_BAD_ITEM;
1744                 break;
1745         case 403:       // Not in coke
1746                 fprintf(stderr, "You are not in coke (sucker)\n");
1747                 rv = RV_PERMISSIONS;
1748                 break;
1749         case 404:       // Unknown user
1750                 fprintf(stderr, "Unknown user '%s'\n", Username);
1751                 rv = RV_INVALID_USER;
1752                 break;
1753         default:
1754                 fprintf(stderr, "Unknown response code %i\n'%s'\n", responseCode, buf);
1755                 rv = RV_UNKNOWN_RESPONSE;
1756                 break;
1757         }
1758         free(buf);
1759
1760         return rv;
1761 }
1762
1763 /**
1764  * \brief Set a user's balance
1765  * \note Only avaliable to dispense admins
1766  */
1767 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1768 {
1769         char    *buf;
1770          int    responseCode;
1771
1772         // Check for a dry run
1773         if( gbDryRun ) {
1774                 printf("Dry Run - No action\n");
1775                 return 0;
1776         }
1777
1778         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1779         buf = ReadLine(Socket);
1780
1781         responseCode = atoi(buf);
1782         free(buf);
1783
1784         switch(responseCode)
1785         {
1786         case 200:       return 0;       // OK
1787         case 403:       // Not in coke
1788                 fprintf(stderr, "You are not an admin\n");
1789                 return RV_PERMISSIONS;
1790         case 404:       // Unknown user
1791                 fprintf(stderr, "Unknown user '%s'\n", Username);
1792                 return RV_INVALID_USER;
1793         default:
1794                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1795                 return RV_UNKNOWN_RESPONSE;
1796         }
1797
1798         return -1;
1799 }
1800
1801 /**
1802  * \brief Give money to another user
1803  */
1804 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1805 {
1806         char    *buf;
1807          int    responseCode;
1808
1809         if( Ammount < 0 ) {
1810                 printf("Sorry, you can only give, you can't take.\n");
1811                 return RV_ARGUMENTS;
1812         }
1813
1814         // Fast return on zero
1815         if( Ammount == 0 ) {
1816                 printf("Are you actually going to give any?\n");
1817                 return RV_ARGUMENTS;
1818         }
1819
1820         // Check for a dry run
1821         if( gbDryRun ) {
1822                 printf("Dry Run - No action\n");
1823                 return 0;
1824         }
1825
1826         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1827
1828         buf = ReadLine(Socket);
1829         responseCode = atoi(buf);
1830         free(buf);
1831         switch(responseCode)
1832         {
1833         case 200:
1834                 printf("Give succeeded\n");
1835                 return RV_SUCCESS;      // OK
1836
1837         case 402:
1838                 fprintf(stderr, "Insufficient balance\n");
1839                 return RV_BALANCE;
1840
1841         case 404:       // Unknown user
1842                 fprintf(stderr, "Unknown user '%s'\n", Username);
1843                 return RV_INVALID_USER;
1844
1845         default:
1846                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1847                 return RV_UNKNOWN_RESPONSE;
1848         }
1849
1850         return -1;
1851 }
1852
1853 int Dispense_Refund(int Socket, const char *Username, const char *Item, int PriceOverride)
1854 {
1855         char    *buf;
1856          int    responseCode, ret = -1;
1857
1858         // Check item id
1859         if( RunRegex(&gUserItemIdentRegex, Item, 0, NULL, NULL) != 0 )
1860         {
1861                 fprintf(stderr, "Error: Invalid item ID passed (should be <type>:<num>)\n");
1862                 return RV_ARGUMENTS;
1863         }
1864
1865         // Check username (quick)
1866         if( strchr(Username, ' ') || strchr(Username, '\n') )
1867         {
1868                 fprintf(stderr, "Error: Username is invalid (no spaces or newlines please)\n");
1869                 return RV_ARGUMENTS;
1870         }
1871
1872         // Send the query
1873         sendf(Socket, "REFUND %s %s %i\n", Username, Item, PriceOverride);
1874
1875         buf = ReadLine(Socket);
1876         responseCode = atoi(buf);
1877         switch(responseCode)
1878         {
1879         case 200:
1880                 Dispense_ShowUser(Socket, Username);    // Show destination account
1881                 ret = 0;
1882                 break;
1883         case 403:
1884                 fprintf(stderr, "Refund access is only avaliable to coke members\n");
1885                 ret = RV_PERMISSIONS;
1886                 break;
1887         case 404:
1888                 fprintf(stderr, "Unknown user '%s' passed\n", Username);
1889                 ret = RV_INVALID_USER;
1890                 break;
1891         case 406:
1892                 fprintf(stderr, "Invalid item '%s' passed\n", Item);
1893                 ret = RV_BAD_ITEM;
1894                 break;
1895         default:
1896                 fprintf(stderr, "Unknown response from server %i\n%s\n", responseCode, buf);
1897                 ret = -1;
1898                 break;
1899         }
1900         free(buf);
1901         return ret;
1902 }
1903
1904 /**
1905  * \brief Donate money to the club
1906  */
1907 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1908 {
1909         char    *buf;
1910          int    responseCode;
1911
1912         if( Ammount < 0 ) {
1913                 printf("Sorry, you can only give, you can't take.\n");
1914                 return -1;
1915         }
1916
1917         // Fast return on zero
1918         if( Ammount == 0 ) {
1919                 printf("Are you actually going to give any?\n");
1920                 return 1;
1921         }
1922
1923         // Check for a dry run
1924         if( gbDryRun ) {
1925                 printf("Dry Run - No action\n");
1926                 return 0;
1927         }
1928
1929         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1930         buf = ReadLine(Socket);
1931
1932         responseCode = atoi(buf);
1933         free(buf);
1934
1935         switch(responseCode)
1936         {
1937         case 200:       return 0;       // OK
1938
1939         case 402:
1940                 fprintf(stderr, "Insufficient balance\n");
1941                 return 1;
1942
1943         default:
1944                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1945                 return -1;
1946         }
1947
1948         return -1;
1949 }
1950
1951 /**
1952  * \brief Enumerate users
1953  */
1954 int Dispense_EnumUsers(int Socket)
1955 {
1956         char    *buf;
1957          int    responseCode;
1958          int    nUsers;
1959         regmatch_t      matches[4];
1960
1961         if( giMinimumBalance != INT_MIN ) {
1962                 if( giMaximumBalance != INT_MAX ) {
1963                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1964                 }
1965                 else {
1966                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1967                 }
1968         }
1969         else {
1970                 if( giMaximumBalance != INT_MAX ) {
1971                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
1972                 }
1973                 else {
1974                         sendf(Socket, "ENUM_USERS\n");
1975                 }
1976         }
1977         buf = ReadLine(Socket);
1978         responseCode = atoi(buf);
1979
1980         switch(responseCode)
1981         {
1982         case 201:       break;  // Ok, length follows
1983
1984         default:
1985                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1986                 free(buf);
1987                 return -1;
1988         }
1989
1990         // Get count (not actually used)
1991         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1992         nUsers = atoi( buf + matches[3].rm_so );
1993         printf("%i users returned\n", nUsers);
1994
1995         // Free string
1996         free(buf);
1997
1998         // Read returned users
1999         do {
2000                 buf = ReadLine(Socket);
2001                 responseCode = atoi(buf);
2002
2003                 if( responseCode != 202 )       break;
2004
2005                 _PrintUserLine(buf);
2006                 free(buf);
2007         } while(responseCode == 202);
2008
2009         // Check final response
2010         if( responseCode != 200 ) {
2011                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
2012                 free(buf);
2013                 return -1;
2014         }
2015
2016         free(buf);
2017
2018         return 0;
2019 }
2020
2021 int Dispense_ShowUser(int Socket, const char *Username)
2022 {
2023         char    *buf;
2024          int    responseCode, ret;
2025
2026         sendf(Socket, "USER_INFO %s\n", Username);
2027         buf = ReadLine(Socket);
2028
2029         responseCode = atoi(buf);
2030
2031         switch(responseCode)
2032         {
2033         case 202:
2034                 _PrintUserLine(buf);
2035                 ret = 0;
2036                 break;
2037
2038         case 404:
2039                 printf("Unknown user '%s'\n", Username);
2040                 ret = 1;
2041                 break;
2042
2043         default:
2044                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2045                 ret = -1;
2046                 break;
2047         }
2048
2049         free(buf);
2050
2051         return ret;
2052 }
2053
2054 void _PrintUserLine(const char *Line)
2055 {
2056         regmatch_t      matches[6];
2057          int    bal;
2058
2059         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
2060         // 3: Username
2061         // 4: Balance
2062         // 5: Flags
2063         {
2064                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
2065                 char    username[usernameLen + 1];
2066                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
2067                 char    flags[flagsLen + 1];
2068
2069                 memcpy(username, Line + matches[3].rm_so, usernameLen);
2070                 username[usernameLen] = '\0';
2071                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
2072                 flags[flagsLen] = '\0';
2073
2074                 bal = atoi(Line + matches[4].rm_so);
2075                 printf("%-15s: $%8.02f (%s)\n", username, ((float)bal)/100, flags);
2076         }
2077 }
2078
2079 int Dispense_AddUser(int Socket, const char *Username)
2080 {
2081         char    *buf;
2082          int    responseCode, ret;
2083
2084         // Check for a dry run
2085         if( gbDryRun ) {
2086                 printf("Dry Run - No action\n");
2087                 return 0;
2088         }
2089
2090         sendf(Socket, "USER_ADD %s\n", Username);
2091
2092         buf = ReadLine(Socket);
2093         responseCode = atoi(buf);
2094
2095         switch(responseCode)
2096         {
2097         case 200:
2098                 printf("User '%s' added\n", Username);
2099                 ret = 0;
2100                 break;
2101
2102         case 403:
2103                 printf("Only wheel can add users\n");
2104                 ret = 1;
2105                 break;
2106
2107         case 404:
2108                 printf("User '%s' already exists\n", Username);
2109                 ret = 0;
2110                 break;
2111
2112         default:
2113                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2114                 ret = -1;
2115                 break;
2116         }
2117
2118         free(buf);
2119
2120         return ret;
2121 }
2122
2123 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString, const char *Reason)
2124 {
2125         char    *buf;
2126          int    responseCode, ret;
2127
2128         // Check for a dry run
2129         if( gbDryRun ) {
2130                 printf("Dry Run - No action\n");
2131                 return 0;
2132         }
2133
2134         // TODO: Pre-validate the string
2135
2136         sendf(Socket, "USER_FLAGS %s %s %s\n", Username, TypeString, Reason);
2137
2138         buf = ReadLine(Socket);
2139         responseCode = atoi(buf);
2140
2141         switch(responseCode)
2142         {
2143         case 200:
2144                 printf("User '%s' updated\n", Username);
2145                 ret = 0;
2146                 break;
2147
2148         case 403:
2149                 printf("Only dispense admins can modify users\n");
2150                 ret = RV_PERMISSIONS;
2151                 break;
2152
2153         case 404:
2154                 printf("User '%s' does not exist\n", Username);
2155                 ret = RV_INVALID_USER;
2156                 break;
2157
2158         case 407:
2159                 printf("Flag string is invalid\n");
2160                 ret = RV_ARGUMENTS;
2161                 break;
2162
2163         default:
2164                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2165                 ret = RV_UNKNOWN_RESPONSE;
2166                 break;
2167         }
2168
2169         free(buf);
2170
2171         return ret;
2172 }
2173
2174 int Dispense_SetItem(int Socket, const char *Type, int ID, int NewPrice, const char *NewName)
2175 {
2176         char    *buf;
2177          int    responseCode, ret;
2178
2179         // Check for a dry run
2180         if( gbDryRun ) {
2181                 printf("Dry Run - No action\n");
2182                 return 0;
2183         }
2184
2185         sendf(Socket, "UPDATE_ITEM %s:%i %i %s\n", Type, ID, NewPrice, NewName);
2186
2187         buf = ReadLine(Socket);
2188         responseCode = atoi(buf);
2189
2190         switch(responseCode)
2191         {
2192         case 200:
2193                 printf("Item %s:%i updated\n", Type, ID);
2194                 ret = 0;
2195                 break;
2196
2197         case 403:
2198                 printf("Only coke members can modify the slots\n");
2199                 ret = RV_PERMISSIONS;
2200                 break;
2201
2202         case 406:
2203                 printf("Invalid item passed\n");
2204                 ret = RV_BAD_ITEM;
2205                 break;
2206
2207         default:
2208                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2209                 ret = -1;
2210                 break;
2211         }
2212
2213         free(buf);
2214
2215         return ret;
2216 }
2217
2218 // ---------------
2219 // --- Helpers ---
2220 // ---------------
2221 char *ReadLine(int Socket)
2222 {
2223         static char     buf[BUFSIZ];
2224         static int      bufPos = 0;
2225         static int      bufValid = 0;
2226          int    len;
2227         char    *newline = NULL;
2228          int    retLen = 0;
2229         char    *ret = malloc(10);
2230
2231         #if DEBUG_TRACE_SERVER
2232         printf("ReadLine: ");
2233         fflush(stdout);
2234         #endif
2235
2236         ret[0] = '\0';
2237
2238         while( !newline )
2239         {
2240                 if( bufValid ) {
2241                         len = bufValid;
2242                 }
2243                 else {
2244                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
2245                         if( len <= 0 ) {
2246                                 free(ret);
2247                                 return strdup("599 Client Connection Error\n");
2248                         }
2249                 }
2250                 buf[bufPos+len] = '\0';
2251
2252                 newline = strchr( buf+bufPos, '\n' );
2253                 if( newline ) {
2254                         *newline = '\0';
2255                 }
2256
2257                 retLen += strlen(buf+bufPos);
2258                 ret = realloc(ret, retLen + 1);
2259                 strcat( ret, buf+bufPos );
2260
2261                 if( newline ) {
2262                          int    newLen = newline - (buf+bufPos) + 1;
2263                         bufValid = len - newLen;
2264                         bufPos += newLen;
2265                 }
2266                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
2267         }
2268
2269         #if DEBUG_TRACE_SERVER
2270         printf("%i '%s'\n", retLen, ret);
2271         #endif
2272
2273         return ret;
2274 }
2275
2276 int sendf(int Socket, const char *Format, ...)
2277 {
2278         va_list args;
2279          int    len;
2280
2281         va_start(args, Format);
2282         len = vsnprintf(NULL, 0, Format, args);
2283         va_end(args);
2284
2285         {
2286                 char    buf[len+1];
2287                 va_start(args, Format);
2288                 vsnprintf(buf, len+1, Format, args);
2289                 va_end(args);
2290
2291                 #if DEBUG_TRACE_SERVER
2292                 printf("sendf: %s", buf);
2293                 #endif
2294
2295                 return send(Socket, buf, len, 0);
2296         }
2297 }
2298
2299 char *trim(char *string)
2300 {
2301          int    i;
2302
2303         while( isspace(*string) )
2304                 string ++;
2305
2306         for( i = strlen(string); i--; )
2307         {
2308                 if( isspace(string[i]) )
2309                         string[i] = '\0';
2310                 else
2311                         break;
2312         }
2313
2314         return string;
2315 }
2316
2317 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
2318 {
2319          int    ret;
2320
2321         ret = regexec(regex, string, nMatches, matches, 0);
2322         if( ret && errorMessage ) {
2323                 size_t  len = regerror(ret, regex, NULL, 0);
2324                 char    errorStr[len];
2325                 regerror(ret, regex, errorStr, len);
2326                 printf("string = '%s'\n", string);
2327                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
2328                 exit(-1);
2329         }
2330
2331         return ret;
2332 }
2333
2334 void CompileRegex(regex_t *regex, const char *pattern, int flags)
2335 {
2336          int    ret = regcomp(regex, pattern, flags);
2337         if( ret ) {
2338                 size_t  len = regerror(ret, regex, NULL, 0);
2339                 char    errorStr[len];
2340                 regerror(ret, regex, errorStr, len);
2341                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
2342                 exit(-1);
2343         }
2344 }