src/dps8/dps8_crdrdr.c

/* */
This source file includes following definitions.
rdr_init
rdr_reset
asciiToH
asciiToHGCOS
getCardLine
getCardData
getRawCardData
getBinCardData
rdrReadRecord
submit
scanForCards
rdrProcessEvent
rdrCardReady
rdr_iom_cmd
rdr_show_nunits
rdr_set_nunits
rdr_show_device_name
rdr_set_device_name
rdr_set_path
rdr_show_path
   1 /*
   2  * vim: filetype=c:tabstop=4:ai:expandtab
   3  * SPDX-License-Identifier: ICU
   4  * SPDX-License-Identifier: Multics
   5  * scspell-id: 89935fa0-f62d-11ec-beae-80ee73e9b8e7
   6  *
   7  * ---------------------------------------------------------------------------
   8  *
   9  * Copyright (c) 2007-2013 Michael Mondy
  10  * Copyright (c) 2012-2016 Harry Reed
  11  * Copyright (c) 2013-2016 Charles Anthony
  12  * Copyright (c) 2016 Michal Tomek
  13  * Copyright (c) 2021 Dean S. Anderson
  14  * Copyright (c) 2021-2025 The DPS8M Development Team
  15  *
  16  * This software is made available under the terms of the ICU License.
  17  * See the LICENSE.md file at the top-level directory of this distribution.
  18  *
  19  * ---------------------------------------------------------------------------
  20  *
  21  * This source file may contain code comments that adapt, include, and/or
  22  * incorporate Multics program code and/or documentation distributed under
  23  * the Multics License.  In the event of any discrepancy between code
  24  * comments herein and the original Multics materials, the original Multics
  25  * materials should be considered authoritative unless otherwise noted.
  26  * For more details and historical background, see the LICENSE.md file at
  27  * the top-level directory of this distribution.
  28  *
  29  * ---------------------------------------------------------------------------
  30  */
  31 
  32 #include <stdio.h>
  33 #include <ctype.h>
  34 #include <signal.h>
  35 #include <stdlib.h>
  36 #include <sys/types.h>
  37 #include <dirent.h>
  38 #include <unistd.h>
  39 #include <errno.h>
  40 #include <sys/stat.h>
  41 #include <fcntl.h>
  42 #include <stdint.h>
  43 
  44 #include "dps8.h"
  45 #include "dps8_iom.h"
  46 #include "dps8_crdrdr.h"
  47 #include "dps8_sys.h"
  48 #include "dps8_cable.h"
  49 #include "dps8_cpu.h"
  50 #include "dps8_faults.h"
  51 #include "dps8_scu.h"
  52 #include "dps8_utils.h"
  53 
  54 #if defined(NO_LOCALE)
  55 # define xstrerror_l strerror
  56 #endif
  57 
  58 #define DBG_CTR 1
  59 #define N_RDR_UNITS 1 // default
  60 
  61 #define snprintf_truncat(dst, size, ...)    \
  62   do                                        \
  63     {                                       \
  64       volatile size_t n = size;             \
  65       (void)snprintf (dst, n, __VA_ARGS__); \
  66     }                                       \
  67   while (0)
  68 
  69 static t_stat rdr_reset (DEVICE * dptr);
  70 static t_stat rdr_show_nunits (FILE *st, UNIT *uptr, int val, const void *desc);
  71 static t_stat rdr_set_nunits (UNIT * uptr, int32 value, const char * cptr, void * desc);
  72 static t_stat rdr_show_device_name (FILE *st, UNIT *uptr, int val, const void *desc);
  73 static t_stat rdr_set_device_name (UNIT * uptr, int32 value, const char * cptr, void * desc);
  74 static t_stat rdr_show_path (UNUSED FILE * st, UNIT * uptr, UNUSED int val,
  75                              UNUSED const void * desc);
  76 static t_stat rdr_set_path (UNUSED UNIT * uptr, UNUSED int32 value, const UNUSED char * cptr,
  77                             UNUSED void * desc);
  78 
  79 #define UNIT_FLAGS ( UNIT_FIX | UNIT_ATTABLE | UNIT_ROABLE | UNIT_DISABLE | \
  80                      UNIT_IDLE )
  81 UNIT rdr_unit [N_RDR_UNITS_MAX] =
  82   {
  83     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  84     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  85     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  86     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  87     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  88     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  89     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  90     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  91     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  92     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  93     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  94     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  95     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  96     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  97     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL},
  98     {UDATA (NULL, UNIT_FLAGS, 0), 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL}
  99   };
 100 
 101 #define RDR_UNIT_NUM(uptr) ((uptr) - rdr_unit)
 102 
 103 static DEBTAB rdr_dt [] =
 104   {
 105     { "NOTIFY", DBG_NOTIFY, NULL },
 106     { "INFO",   DBG_INFO,   NULL },
 107     { "ERR",    DBG_ERR,    NULL },
 108     { "WARN",   DBG_WARN,   NULL },
 109     { "DEBUG",  DBG_DEBUG,  NULL },
 110     { "ALL",    DBG_ALL,    NULL }, // Don't move as it messes up DBG message
 111     { NULL,     0,          NULL }
 112   };
 113 
 114 #define UNIT_WATCH UNIT_V_UF
 115 
 116 static MTAB rdr_mod [] =
 117   {
 118 #if !defined(SPEED)
 119     { UNIT_WATCH, 1, "WATCH",   "WATCH",   0, 0, NULL, NULL },
 120     { UNIT_WATCH, 0, "NOWATCH", "NOWATCH", 0, 0, NULL, NULL },
 121 #endif /* if !defined(SPEED) */
 122     {
 123       MTAB_XTD | MTAB_VDV | \
 124       MTAB_NMO | MTAB_VALR,                 /* Mask               */
 125       0,                                    /* Match              */
 126       "NUNITS",                             /* Print string       */
 127       "NUNITS",                             /* Match string       */
 128       rdr_set_nunits,                       /* Validation routine */
 129       rdr_show_nunits,                      /* Display routine    */
 130       "Number of RDR units in the system",  /* Value descriptor   */
 131       NULL                                  /* Help               */
 132     },
 133     {
 134       MTAB_XTD | MTAB_VUN | \
 135       MTAB_VALR | MTAB_NC,                  /* Mask               */
 136       0,                                    /* Match              */
 137       "NAME",                               /* Print string       */
 138       "NAME",                               /* Match string       */
 139       rdr_set_device_name,                  /* Validation routine */
 140       rdr_show_device_name,                 /* Display routine    */
 141       "Select the boot drive",              /* Value descriptor   */
 142       NULL                                  /* Help               */
 143     },
 144     {
 145       MTAB_XTD | MTAB_VDV | MTAB_NMO | \
 146       MTAB_VALR | MTAB_NC,                  /* Mask               */
 147       0,                                    /* Match              */
 148       "PATH",                               /* Print string       */
 149       "PATH",                               /* Match string       */
 150       rdr_set_path,                         /* Validation routine */
 151       rdr_show_path,                        /* Display routine    */
 152       "Path to card reader directories",    /* Value descriptor   */
 153       NULL                                  /* Help               */
 154     },
 155 
 156     { 0, 0, NULL, NULL, 0, 0, NULL, NULL }
 157   };
 158 
 159 DEVICE rdr_dev = {
 160     "RDR",        /* Name                */
 161     rdr_unit,     /* Units               */
 162     NULL,         /* Registers           */
 163     rdr_mod,      /* Modifiers           */
 164     N_RDR_UNITS,  /* #units              */
 165     10,           /* Address radix       */
 166     24,           /* Address width       */
 167     1,            /* Address increment   */
 168     8,            /* Data radix          */
 169     36,           /* Data width          */
 170     NULL,         /* Examine             */
 171     NULL,         /* Deposit             */
 172     rdr_reset,    /* Reset               */
 173     NULL,         /* Boot                */
 174     NULL,         /* Attach              */
 175     NULL,         /* Detach              */
 176     NULL,         /* Context             */
 177     DEV_DEBUG,    /* Flags               */
 178     0,            /* Debug control flags */
 179     rdr_dt,       /* Debug flag names    */
 180     NULL,         /* Memory size change  */
 181     NULL,         /* Logical name        */
 182     NULL,         /* Help                */
 183     NULL,         /* Attach help         */
 184     NULL,         /* Attach context      */
 185     NULL,         /* Description         */
 186     NULL          /* End                 */
 187 };
 188 
 189 enum deckFormat { sevenDeck, cardDeck, streamDeck, xDeck, gDeck, bDeck };
 190 
 191 // Windows cannot unlink an open file; rework the code to unlink the
 192 // submitted card deck after closing it.
 193 //  -- Add fname tp rdr_state
 194 //  -- Add unlink calls at eof close
 195 static struct rdr_state
 196   {
 197     enum rdr_mode
 198       {
 199         rdr_no_mode, rdr_rd_bin
 200       } io_mode;
 201     int deckfd;
 202     // Sending a ++END means that the read_cards command has to be reissued
 203     //enum { deckStart = 0, eof1Sent, uid1Sent, inputSent, eof2Sent, uid2Sent } deckState;
 204     enum { deckStart = 0, eof1Sent, uid1Sent, inputSent, eof2Sent} deckState;
 205     enum deckFormat deckFormat;
 206     bool running;
 207     char device_name [MAX_DEV_NAME_LEN];
 208     char fname [PATH_MAX+1];
 209   } rdr_state [N_RDR_UNITS_MAX];
 210 
 211 static char* rdr_name = "rdr";
 212 static char rdr_path_prefix[PATH_MAX+1];
 213 
 214 /*
 215  * rdr_init()
 216  */
 217 
 218 // Once-only initialization
 219 
 220 void rdr_init (void)
     /*  */
 221   {
 222     (void)memset (rdr_path_prefix, 0, sizeof (rdr_path_prefix));
 223     (void)memset (rdr_state, 0, sizeof (rdr_state));
 224     for (uint i = 0; i < N_RDR_UNITS_MAX; i ++)
 225       rdr_state [i] . deckfd = -1;
 226   }
 227 
 228 static t_stat rdr_reset (UNUSED DEVICE * dptr)
     /*  */
 229   {
 230 
 231 
 232 
 233 
 234 
 235 
 236 
 237     return SCPE_OK;
 238   }
 239 
 240 // General Electric Cards
 241 //
 242 // General Electric used the following collating sequence on their machines,
 243 // including the GE 600 (the machine on which Multics was developed); this is
 244 // largely upward compatible from the IBM 026 commercial character set, and it
 245 // shows strong influence from the IBM 1401 character set while supporting the
 246 // full ASCII character set, with 64 printable characters, as it was understood
 247 // in the 1960's.
 248 //
 249 // GE   &-0123456789ABCDEFGHIJKLMNOPQR/STUVWXYZ[#@:>?+.](<\^$*);'_,%="!
 250 //      ________________________________________________________________
 251 //     /&-0123456789ABCDEFGHIJKLMNOPQR/STUVWXYZ #@:>V .¤(<§ $*);^±,%='"
 252 // 12 / O           OOOOOOOOO                        OOOOOO
 253 // 11|   O                   OOOOOOOOO                     OOOOOO
 254 //  0|    O                           OOOOOOOOO                  OOOOOO
 255 //  1|     O        O        O        O
 256 //  2|      O        O        O        O       O     O     O     O
 257 //  3|       O        O        O        O       O     O     O     O
 258 //  4|        O        O        O        O       O     O     O     O
 259 //  5|         O        O        O        O       O     O     O     O
 260 //  6|          O        O        O        O       O     O     O     O
 261 //  7|           O        O        O        O       O     O     O     O
 262 //  8|            O        O        O        O OOOOOOOOOOOOOOOOOOOOOOOO
 263 //  9|             O        O        O        O
 264 //   |__________________________________________________________________
 265 // In the above, the 0-8-2 punch shown as _ should be printed as an assignment
 266 // arrow, and the 11-8-2 punch shown as ^ should be printed as an up-arrow.
 267 // This conforms to the evolution of of these ASCII symbols from the time GE
 268 // adopted this character set and the present.
 269 
 270 // Sadly, AG91, App. C disagrees
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 359 
 360 // From card_codes_.alm
 361 
 362 static uint16 table [128] =
 363   {
 364     05403, 04401, 04201, 04101, 00005, 01023, 01013, 01007,
 365     02011, 04021, 02021, 04103, 04043, 04023, 04013, 04007,
 366     06403, 02401, 02201, 02101, 00043, 00023, 00201, 01011,
 367     02003, 02403, 00007, 01005, 02043, 02023, 02013, 02007,
 368     00000, 02202, 00006, 00102, 02102, 01042, 04000, 00022,
 369     04022, 02022, 02042, 04012, 01102, 02000, 04102, 01400,
 370     01000, 00400, 00200, 00100, 00040, 00020, 00010, 00004,
 371     00002, 00001, 00202, 02012, 04042, 00012, 01012, 01006,
 372     00042, 04400, 04200, 04100, 04040, 04020, 04010, 04004,
 373     04002, 04001, 02400, 02200, 02100, 02040, 02020, 02010,
 374     02004, 02002, 02001, 01200, 01100, 01040, 01020, 01010,
 375     01004, 01002, 01001, 05022, 04202, 06022, 02006, 01022,
 376     00402, 05400, 05200, 05100, 05040, 05020, 05010, 05004,
 377     05002, 05001, 06400, 06200, 06100, 06040, 06020, 06010,
 378     06004, 06002, 06001, 03200, 03100, 03040, 03020, 03010,
 379     03004, 03002, 03001, 05000, 04006, 03000, 03400, 00000
 380   };
 381 
 382 static uint16 gcos_table [128] =
 383   {
 384     05403, 04401, 04201, 04101, 00005, 01023, 01013, 01007,
 385     02011, 04021, 02021, 04103, 04043, 04023, 04013, 04007,
 386     06403, 02401, 02201, 02101, 00043, 00023, 00201, 01011,
 387     02003, 02403, 00007, 01005, 02043, 02023, 02013, 02007,
 388     00000, /*02202*/ 01006, /*00006*/ 01012, 00102, 02102, 01042, 04000, /*00022*/ 02006,
 389     04022, 02022, 02042, /*04012*/ 05000, 01102, 02000, 04102, 01400,
 390     01000, 00400, 00200, 00100, 00040, 00020, 00010, 00004,
 391     00002, 00001, /*00202*/ 00022, 02012, /*04042*/ 04012, /*00012*/ 01022, /*01012*/ 00012, /*01006*/ 00006,
 392     00042, 04400, 04200, 04100, 04040, 04020, 04010, 04004,
 393     04002, 04001, 02400, 02200, 02100, 02040, 02020, 02010,
 394     02004, 02002, 02001, 01200, 01100, 01040, 01020, 01010,
 395     01004, 01002, 01001, /*05022*/ 00202, /*04202*/ /* 01201 */ 04006, /*06022*/ 04042, /*02006*/ 03000, /*01022*/ 01202,
 396     00402, 05400, 05200, 05100, 05040, 05020, 05010, 05004,
 397     05002, 05001, 06400, 06200, 06100, 06040, 06020, 06010,
 398     06004, 06002, 06001, 03200, 03100, 03040, 03020, 03010,
 399     03004, 03002, 03001, 05000, 04006, 03000, 03400, 00000
 400   };
 401 
 402 static void asciiToH (char * str, uint * hstr, size_t l)
     /*  */
 403   {
 404     char * p = str;
 405     for (size_t i = 0; i < l; i ++)
 406     //for (char * p = str; * p; p ++)
 407       {
 408         * hstr ++ = table [(* p) & 0177];
 409         p ++;
 410       }
 411   }
 412 
 413 static void asciiToHGCOS (char * str, uint * hstr, size_t l)
     /*  */
 414   {
 415     char * p = str;
 416     for (size_t i = 0; i < l; i ++)
 417     //for (char * p = str; * p; p ++)
 418       {
 419         * hstr ++ = gcos_table [(* p) & 0177];
 420         p ++;
 421       }
 422   }
 423 
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 452 static int getCardLine (int fd, unsigned char * buffer)
     /*  */
 453   {
 454     uint n = 0;
 455     buffer [n] = 0;
 456     while (1)
 457       {
 458         uint8 ch;
 459         ssize_t rc = read (fd, & ch, 1);
 460         if (rc <= 0) // eof or err
 461           return n == 0;
 462         if (ch == '\n')
 463           return 0;
 464         buffer [n ++] = ch;
 465         buffer [n] = 0;
 466         if (n > 79)
 467           return 0;
 468       }
 469 #if defined(SUNLINT) || !defined(__SUNPRO_C) && !defined(__SUNPRO_CC)
 470     /*NOTREACHED*/ /* unreachable */
 471     return 0;
 472 #endif /* if defined(SUNLINT) || !defined(__SUNPRO_C) && !defined(__SUNPRO_CC) */
 473   }
 474 
 475 static int getCardData (int fd, char * buffer)
     /*  */
 476   {
 477     (void)memset (buffer, 0, 80);
 478     ssize_t rc = read (fd, buffer, 80);
 479     if (rc < 0)
 480       return 0;
 481     return (int) rc;
 482   }
 483 
 484 #define rawCardImageBytes (80 * 12 / 8)
 485 static int getRawCardData (int fd, uint8_t * buffer)
     /*  */
 486   {
 487     (void)memset (buffer, 0, rawCardImageBytes + 2);
 488     ssize_t rc = read (fd, buffer, rawCardImageBytes);
 489     if (rc < 0)
 490       return 0;
 491     return (int) rc;
 492   }
 493 
 494 #define CARD_COL_COUNT 80
 495 #define NIBBLES_PER_COL 3
 496 #define NIBBLES_PER_CARD (CARD_COL_COUNT * NIBBLES_PER_COL)
 497 #define BYTES_PER_CARD (NIBBLES_PER_CARD / 2)
 498 
 499 typedef struct
 500 {
 501   word12 column[CARD_COL_COUNT];
 502 } card_image_t;
 503 
 504 card_image_t card;
 505 
 506 static int getBinCardData (int fd, card_image_t* card)
     /*  */
 507   {
 508     uint8 byte_buffer[BYTES_PER_CARD];
 509 
 510     ssize_t bytes_read = read (fd, byte_buffer, BYTES_PER_CARD);
 511     if (bytes_read <= 0)
 512       return 0;
 513 
 514     for (int col = 0; col < CARD_COL_COUNT; col++)
 515       {
 516         card->column[col] = 0;
 517       }
 518 
 519     for (int current_nibble = 0; current_nibble < NIBBLES_PER_CARD; current_nibble++)
 520       {
 521         int byte_offset = current_nibble / 2;
 522         int nibble_offset = (2 - (current_nibble % 3)) * 4;
 523         int col = current_nibble / 3;
 524 
 525         word12 nibble = (current_nibble & 0x1) ? byte_buffer[byte_offset] : (byte_buffer[byte_offset] >> 4);
 526         nibble &= 0x00000F;
 527         card->column[col] |= (nibble << nibble_offset);
 528       }
 529 
 530     return (int) bytes_read;
 531   }
 532 
 533 #if defined(TESTING)
 534 static bool empty = false;
 535 #endif /* if defined(TESTING) */
 536 
 537 static int rdrReadRecord (uint iomUnitIdx, uint chan) {
     /*  */
 538 #if defined(TESTING)
 539   cpu_state_t * cpup  = _cpup;
 540   (void)cpup;
 541 #endif
 542   iom_chan_data_t * p = & iom_chan_data [iomUnitIdx] [chan];
 543   //sim_debug (DBG_NOTIFY, & rdr_dev, "Read binary\r\n");
 544   uint ctlr_unit_idx  = get_ctlr_idx (iomUnitIdx, chan);
 545   uint unitIdx        = cables->urp_to_urd[ctlr_unit_idx][p->IDCW_DEV_CODE].unit_idx;
 546 
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 562 
 563 #if defined(TESTING)
 564   sim_printf ("hopper not empty\r\n");
 565   empty = false;
 566 #endif
 567   unsigned char cardImage [80] = "";
 568   uint8_t rawCardImage [rawCardImageBytes + 2 ];
 569   size_t l = 0;
 570   // initialize to quiet compiler
 571   enum deckFormat thisCard = cardDeck;
 572 
 573   static int jobNo = 0;
 574 
 575   switch (rdr_state [unitIdx].deckState) {
 576     case deckStart: {
 577 #if defined(TESTING)
 578   sim_printf ("deckStart: sending ++EOF\r\n");
 579 #endif
 580       strcpy ((char *) cardImage, "++EOF");
 581       l = strlen ((char *) cardImage);
 582       thisCard = cardDeck; //-V1048
 583       rdr_state [unitIdx].deckState = eof1Sent;
 584       jobNo ++;
 585     }
 586     break;
 587 
 588     case eof1Sent: {
 589 #if defined(TESTING)
 590   sim_printf ("eof1Sent: sending ++UID\r\n");
 591 #endif
 592       (void)sprintf ((char *) cardImage, "++UID %d", jobNo);
 593       l = strlen ((char *) cardImage);
 594       thisCard = cardDeck; //-V1048
 595       rdr_state [unitIdx].deckState = uid1Sent;
 596     }
 597     break;
 598 
 599     case uid1Sent: {
 600 #if defined(TESTING)
 601   sim_printf ("uid1Sent: sending data\r\n");
 602 #endif
 603       int rc = getCardLine (rdr_state [unitIdx].deckfd, cardImage);
 604       if (rc) {
 605 #if defined(TESTING)
 606   sim_printf ("uid1Sent: getCardLine returned %d\r\n", rc);
 607 #endif
 608         close (rdr_state [unitIdx].deckfd);
 609         // Windows can't unlink open files; do it now...
 610         rc = unlink (rdr_state [unitIdx].fname);
 611         if (rc)
 612           (void)sir_error ("crdrdr: Failure unlinking card reader deck: %s (Error %d)", xstrerror_l (errno), errno);
 613         rdr_state [unitIdx].deckfd = -1;
 614         rdr_state [unitIdx].deckState = deckStart;
 615         p->stati = 04201; // hopper empty
 616         return IOM_CMD_DISCONNECT;
 617       }
 618 #if defined(TESTING)
 619   sim_printf ("uid1Sent: getCardLine returned <%s>\r\n", cardImage);
 620 #endif
 621       l = strlen ((char *) cardImage);
 622       thisCard = cardDeck; //-V1048
 623       if (strncasecmp ((char *) cardImage, "++input", 7) == 0) {
 624 #if defined(TESTING)
 625   sim_printf ("uid1Sent: switching to inputSent <%s>\r\n", cardImage);
 626 #endif
 627         rdr_state [unitIdx].deckState = inputSent;
 628       }
 629     }
 630     break;
 631 
 632     // Reading the actual data cards
 633 
 634     case inputSent: {
 635 #if defined(TESTING)
 636   sim_printf ("inputSent: format %d\r\n", rdr_state [unitIdx].deckFormat);
 637 #endif
 638       switch (rdr_state [unitIdx].deckFormat) {
 639         case xDeck:
 640         case gDeck: {
 641 #if defined(TESTING)
 642   sim_printf ("inputSent: xDeck or gDeck\r\n");
 643 #endif
 644           int rc = getCardLine (rdr_state [unitIdx].deckfd, cardImage);
 645           if (rc) {
 646             rdr_state [unitIdx].deckState = deckStart;
 647             close (rdr_state [unitIdx].deckfd);
 648             // Windows can't unlink open files; do it now...
 649             int rc = unlink (rdr_state [unitIdx].fname);
 650             if (rc)
 651               (void)sir_error ("crdrdr: Failure unlinking card reader deck: %s (Error %d)", xstrerror_l (errno), errno);
 652             rdr_state [unitIdx].deckfd = -1;
 653             p->stati = 04201; // hopper empty
 654             return IOM_CMD_DISCONNECT;
 655           }
 656           l = strlen ((char *) cardImage);
 657         }
 658         thisCard = cardDeck; //-V1048
 659         break;
 660 
 661         case cardDeck: {
 662 #if defined(TESTING)
 663   sim_printf ("inputSent: cardDeck\r\n");
 664 #endif
 665           int rc = getCardLine (rdr_state [unitIdx].deckfd, cardImage);
 666           if (rc) {
 667             strcpy ((char *) cardImage, "++EOF");
 668             rdr_state [unitIdx].deckState = eof2Sent;
 669           }
 670           l = strlen ((char *) cardImage);
 671         }
 672         thisCard = cardDeck; //-V1048
 673         break;
 674 
 675         case streamDeck: {
 676 #if defined(TESTING)
 677   sim_printf ("inputSent: streamDeck\r\n");
 678 #endif
 679           l = (size_t) getCardData (rdr_state [unitIdx].deckfd, (char *) cardImage);
 680           if (l) {
 681             thisCard = streamDeck;
 682           } else {
 683             strcpy ((char *) cardImage, "++EOF");
 684             l = strlen ((char *) cardImage);
 685             rdr_state [unitIdx].deckState = eof2Sent;
 686             thisCard = cardDeck; //-V1048
 687           }
 688 #if defined(TESTING)
 689   sim_printf ("inputSent: getCardLine returned <%s>\r\n", cardImage);
 690 #endif
 691         }
 692         break;
 693 
 694         case bDeck:
 695 #if defined(TESTING)
 696   sim_printf ("inputSent: bDeck\r\n");
 697 #endif
 698         l = (size_t) getBinCardData (rdr_state [unitIdx].deckfd, &card);
 699         if (l) {
 700           thisCard = bDeck;
 701         } else {
 702           rdr_state [unitIdx].deckState = deckStart;
 703           close (rdr_state [unitIdx].deckfd);
 704           // Windows can't unlink open files; do it now...
 705           int rc = unlink (rdr_state [unitIdx].fname);
 706           if (rc)
 707             (void)sir_error ("crdrdr: Failure unlinking card reader deck: %s (Error %d)", xstrerror_l (errno), errno);
 708           rdr_state [unitIdx].deckfd = -1;
 709           p->stati = 04201; // hopper empty
 710           return IOM_CMD_DISCONNECT;
 711         }
 712         break;
 713 
 714         case sevenDeck: {
 715 #if defined(TESTING)
 716   sim_printf ("inputSent: 7Deck\r\n");
 717 #endif
 718           l = (size_t) getRawCardData (rdr_state [unitIdx].deckfd, rawCardImage);
 719           if (l) {
 720             thisCard = sevenDeck;
 721           } else {
 722             strcpy ((char *) cardImage, "++EOF");
 723             l = strlen ((char *) cardImage);
 724             rdr_state [unitIdx].deckState = eof2Sent;
 725             thisCard = cardDeck; //-V1048
 726           }
 727         }
 728         break;
 729 
 730       } // switch (deckFormat)
 731     } // case inputSent
 732     break;
 733 
 734 // Sending a ++END means that the read_cards command has to be reissued
 735 
 736     case eof2Sent: {
 737 # if defined(TESTING)
 738   sim_printf ("eof2Sent\r\n");
 739 # endif
 740       (void)sprintf ((char *) cardImage, "++UID %d", jobNo);
 741       l = strlen ((char *) cardImage);
 742       thisCard = cardDeck; //-V1048
 743       rdr_state [unitIdx].deckState = deckStart;
 744       close (rdr_state [unitIdx].deckfd);
 745       // Windows can't unlink open files; do it now...
 746       int rc = unlink (rdr_state [unitIdx].fname);
 747       if (rc)
 748         (void)sir_error ("crdrdr: Failure unlinking card reader deck: %s (Error %d)", xstrerror_l (errno), errno);
 749       rdr_state [unitIdx].deckfd = -1;
 750     }
 751     break;
 752 
 753 
 754 
 755 
 756 
 757 
 758 
 759 
 760 
 761 
 762 
 763 
 764 
 765 
 766 
 767 
 768 
 769 
 770 
 771 
 772 
 773 
 774 
 775 
 776 
 777 
 778 
 779 
 780 
 781   }
 782 
 783 
 784 
 785 
 786 
 787     //sim_printf ("card <%s>\r\n", cardImage);
 788 
 789 
 790 
 791 
 792 
 793 
 794 
 795 
 796 
 797 
 798 
 799 
 800 
 801 
 802   word36 buffer [27];
 803   switch (thisCard) {
 804     case bDeck: {
 805         // number of columns
 806         uint l = 80;
 807         // 12 bits / char
 808         uint nbits = (uint) l * 12;
 809         // 36 bits / word
 810         uint tally = (nbits + 35) / 36;
 811 
 812         if (tally > 27) { //-V547
 813             sim_warn ("Impossible rdr tally: %d > 27; truncating.\r\n", tally);
 814             tally = 27;
 815         }
 816 
 817         // Remember that Hollerith for blank is 0, this is really
 818         // filling the buffer with blanks.
 819         (void)memset (buffer, 0, sizeof (buffer));
 820         for (uint col = 0; col < l; col ++) {
 821             uint wordno  = col / 3;
 822             uint fieldno = col % 3;
 823             putbits36_12 (& buffer [wordno], fieldno * 12, (word12) card.column [col]);
 824       }
 825     }
 826     break;
 827     case sevenDeck: {
 828       // This will overread rawCardImage by 12 bits, but that's okay
 829       // because Multics will ignore the last 12 bits.
 830       for (uint i = 0; i < 27; i ++)
 831         buffer [i] = extr36 ((uint8 *) rawCardImage, i);
 832       //sim_printf ("7deck %012"PRIo64" %012"PRIo64" %012"PRIo64" %012"PRIo64"\r\n",
 833       //             buffer [0], buffer [1], buffer [2], buffer [3]);
 834     }
 835     break;
 836 
 837     case streamDeck:
 838 
 839 
 840 
 841 
 842 
 843 
 844 
 845 
 846 
 847 
 848     case xDeck:
 849     case gDeck:
 850     case cardDeck: {
 851       if (l > 80) {
 852         sim_warn ("Whups. rdr l %lu > 80; truncating.\r\n", (unsigned long)l);
 853         l = 80;
 854         //cardImage [l] = 0;
 855       }
 856 
 857       uint hbuf [l + 1];
 858 
 859       if (rdr_state [unitIdx].deckFormat == gDeck) {
 860           asciiToHGCOS ((char *) cardImage, hbuf, l);
 861       }
 862       else {
 863           asciiToH ((char *) cardImage, hbuf, l);
 864       }
 865 
 866       // 12 bits / char
 867       uint nbits = (uint) l * 12;
 868       // 36 bits / word
 869       uint tally = (nbits + 35) / 36;
 870 
 871       if (tally > 27) { //-V547
 872         sim_warn ("Impossible rdr tally: %d > 27; truncating.\r\n", tally);
 873         tally = 27;
 874       }
 875 
 876       // Remember that Hollerith for blank is 0, this is really
 877       // filling the buffer with blanks.
 878       (void)memset (buffer, 0, sizeof (buffer));
 879       for (uint col = 0; col < l; col ++) {
 880         uint wordno  = col / 3;
 881         uint fieldno = col % 3;
 882         putbits36_12 (& buffer [wordno], fieldno * 12, (word12) hbuf [col]);
 883       }
 884     }
 885     break;
 886   }
 887 
 888 
 889 
 890 
 891 
 892 
 893 
 894 
 895 
 896 
 897 
 898   p->stati = 04000;
 899 
 900   // Card images are 80 columns.
 901   uint tally = 27;
 902 
 903   iom_indirect_data_service (iomUnitIdx, chan, buffer, & tally, true);
 904   p->initiate     = false;
 905   p->stati        = 04000; //-V1048  // ok
 906   p->tallyResidue = (word12) tally & MASK12;
 907   p->charPos      = 0;
 908 
 909   return IOM_CMD_PROCEED;
 910 }
 911 
 912 static void submit (enum deckFormat fmt, char * fname, uint16 readerIndex)
     /*  */
 913   {
 914     if (readerIndex >= N_RDR_UNITS_MAX) {
 915       sim_warn("crdrdr: submit called with invalid reader index %ld\r\n", (long) readerIndex);
 916       return;
 917     }
 918 
 919     int deckfd = open (fname, O_RDONLY);
 920     if (deckfd < 0)
 921       (void)sir_error ("crdrdr: Failure opening card reader deck: %s (Error %d)", xstrerror_l (errno), errno);
 922     // Windows can't unlink open files; save the file name and unlink on close.
 923     // int rc = unlink (fname); // this only works on UNIX
 924 #if defined(TESTING)
 925     sim_printf ("submit %s\r\n", fname);
 926 #endif
 927 #if defined(__GNUC__)
 928 # if !defined(__clang_version__)
 929 #  if __GNUC__ > 7
 930 #   if !defined(__INTEL_COMPILER)
 931 #    pragma GCC diagnostic push
 932 #    pragma GCC diagnostic ignored "-Wstringop-truncation"
 933 #   endif /* if !defined(__INTEL_COMPILER) */
 934 #  endif /* if __GNUC__ > 7 */
 935 # endif /* if !defined(__clang_version__) */
 936 #endif /* if defined(__GNUC__) */
 937     strncpy (rdr_state [readerIndex].fname, fname, sizeof(rdr_state [readerIndex].fname) - 1);
 938     rdr_state [readerIndex].fname [sizeof(rdr_state [readerIndex].fname) - 1] = '\0';
 939 #if defined(__GNUC__)
 940 # if !defined(__clang_version__)
 941 #  if __GNUC__ > 7
 942 #   if !defined(__INTEL_COMPILER)
 943 #    pragma GCC diagnostic pop
 944 #   endif /* if !defined(__INTEL_COMPILER) */
 945 #  endif /* if __GNUC__ > 7 */
 946 # endif /* if !defined(__clang_version__) */
 947 #endif /* if defined(__GNUC__) */
 948     rdr_state [readerIndex].deckfd     = deckfd;
 949     rdr_state [readerIndex].deckState  = deckStart;
 950     rdr_state [readerIndex].deckFormat = fmt;
 951     if (fmt == xDeck || fmt == gDeck || fmt == bDeck) { // xDecks, gDecks, and bDecks just sends the card images
 952       rdr_state [readerIndex].deckState  = inputSent;
 953     }
 954     if (deckfd >= 0)
 955       rdrCardReady (readerIndex);
 956   }
 957 
 958 static void scanForCards(uint16 readerIndex)
     /*  */
 959   {
 960     char rdr_dir [2 * PATH_MAX + 8];
 961 
 962     if (readerIndex >= N_RDR_UNITS_MAX)
 963       {
 964         (void)sir_error ("crdrdr: scanForCards called with invalid reader index %d", readerIndex);
 965         return;
 966       }
 967 
 968 #if !defined(__MINGW64__) || !defined(__MINGW32__)
 969     const char* r_tmpdir = getenv("TMPDIR") ? getenv("TMPDIR") : "/tmp";
 970 #else
 971     const char* r_tmpdir = getenv("TEMP") ? getenv("TEMP") : \
 972                            getenv("TMP")  ? getenv("TMP")  : ".";
 973 #endif /* if !defined(__MINGW64__) || !defined(__MINGW32__) */
 974     snprintf_truncat(rdr_dir, PATH_MAX + 1, "%s/%s%c",
 975                      r_tmpdir, rdr_name, 'a' + readerIndex);
 976 
 977     if (rdr_path_prefix [0])
 978       {
 979         snprintf_truncat(rdr_dir, PATH_MAX + 1, "%s%s%c",
 980                          rdr_path_prefix, rdr_name, 'a' + readerIndex);
 981       }
 982 
 983     DIR * dp;
 984     dp = opendir (rdr_dir);
 985     if (! dp)
 986       {
 987         if (errno == ENOENT)
 988           {
 989             (void)sir_notice ("crdrdr: Punch reader %s%c input directory '%s' not found; creating it.",
 990                               rdr_name, 'a' + readerIndex, rdr_dir);
 991             if (x_mkdir_p (rdr_dir) == -1)
 992               {
 993                 (void)sir_error ("crdrdr: Failure creating punch reader %s%c input directory '%s': %s (Error %d)",
 994                                  rdr_name, 'a' + readerIndex, rdr_dir, xstrerror_l (errno), errno);
 995                 return;
 996               }
 997           }
 998 
 999         dp = opendir (rdr_dir); /* Second try */
1000         if (! dp)
1001           {
1002             (void)sir_error ("crdrdr: Failure opening punch reader %s%c input directory '%s': %s (Error %d)",
1003                              rdr_name, 'a' + readerIndex, rdr_dir, xstrerror_l (errno), errno);
1004             return;
1005           }
1006       }
1007 
1008     struct dirent * entry;
1009     struct stat info;
1010     char fqname [2 * PATH_MAX + 8];
1011     while ((entry = readdir (dp)))
1012       {
1013         strcpy (fqname, rdr_dir);
1014         strcat (fqname, "/");
1015         strcat (fqname, entry -> d_name);
1016 
1017         if (stat(fqname, &info) != 0)
1018           {
1019             (void)sir_error ("crdrdr: scanForCards stat() failure for %s: %s (Error %d)",
1020                              fqname, xstrerror_l(errno), errno);
1021             continue;
1022           }
1023 
1024         if (S_ISDIR(info.st_mode))
1025           {
1026             // Found a directory so skip it
1027             continue;
1028           }
1029 
1030         if (rdr_state [readerIndex] . deckfd < 0)
1031           {
1032             if (strncmp (entry -> d_name, "xdeck.", 6) == 0)
1033               {
1034                 submit (xDeck, fqname, readerIndex);
1035                 break;
1036               }
1037             if (strncmp (entry -> d_name, "gdeck.", 6) == 0)
1038               {
1039                 submit (gDeck, fqname, readerIndex);
1040                 break;
1041               }
1042             if (strncmp (entry -> d_name, "cdeck.", 6) == 0)
1043               {
1044                 submit (cardDeck, fqname, readerIndex);
1045                 break;
1046               }
1047             if (strncmp (entry -> d_name, "7deck.", 6) == 0)
1048               {
1049                 submit (sevenDeck, fqname, readerIndex);
1050                 break;
1051               }
1052             if (strncmp (entry -> d_name, "sdeck.", 6) == 0)
1053               {
1054                 submit (streamDeck, fqname, readerIndex);
1055                 break;
1056               }
1057             if (strncmp (entry -> d_name, "bdeck.", 6) == 0)
1058               {
1059                 submit (bDeck, fqname, readerIndex);
1060                 break;
1061               }
1062           }
1063         if (strcmp (entry -> d_name, "discard") == 0)
1064           {
1065             // Windows can't unlink open files; do it now...
1066             int rc = unlink (fqname);
1067             if (rc)
1068               (void)sir_error ("crdrdr: Failure unlinking card reader deck: %s (Error %d)", xstrerror_l (errno), errno);
1069             if (rdr_state [readerIndex] . deckfd >= 0)
1070               {
1071                 close (rdr_state [readerIndex] . deckfd);
1072                 rc = unlink (rdr_state [readerIndex] . fname);
1073                 if (rc)
1074                   (void)sir_error ("crdrdr: Failure unlinking card reader deck: %s (Error %d)", xstrerror_l (errno), errno);
1075                 rdr_state [readerIndex] . deckfd = -1;
1076                 rdr_state [readerIndex] . deckState = deckStart;
1077                 break;
1078              }
1079           }
1080       }
1081     closedir (dp);
1082   }
1083 
1084 void rdrProcessEvent (void)
     /*  */
1085   {
1086     if (rdr_path_prefix [0])
1087       {
1088         // We support multiple card readers when path prefixing is turned on
1089         // so we need to check each possible reader to see if it is active
1090         for (uint16 reader_idx = 0; reader_idx < rdr_dev . numunits; reader_idx++)
1091           {
1092             if (rdr_state [reader_idx] . running)
1093                 scanForCards(reader_idx);
1094           }
1095       }
1096     else
1097       {
1098         // When path prefixing is off we only support a single card reader
1099         // (this is for backwards compatibility)
1100         if (! rdr_state [0] . running)
1101           return;
1102 
1103         scanForCards(0);
1104       }
1105   }
1106 
1107 void rdrCardReady (int unitNum)
     /*  */
1108   {
1109     uint ctlr_unit_idx = cables->rdr_to_urp [unitNum].ctlr_unit_idx;
1110     uint ctlr_port_num = 0; // Single port device
1111     uint iom_unit_idx  = cables->urp_to_iom[ctlr_unit_idx][ctlr_port_num].iom_unit_idx;
1112     uint chan_num      = cables->urp_to_iom[ctlr_unit_idx][ctlr_port_num].chan_num;
1113     uint dev_code      = cables->rdr_to_urp[unitNum].dev_code;
1114     send_special_interrupt (iom_unit_idx, chan_num, dev_code, 0377, 0377 /* card reader to ready */); //-V536
1115   }
1116 
1117 iom_cmd_rc_t rdr_iom_cmd (uint iomUnitIdx, uint chan) {
     /*  */
1118   iom_chan_data_t * p = & iom_chan_data [iomUnitIdx] [chan];
1119 #if defined(xTESTING)
1120   uint dev_code       = p->IDCW_DEV_CODE;
1121   cpu_state_t * cpup  = _cpup;
1122 
1123   //sim_debug (DBG_TRACE, & rdr_dev, "%s: RDR %c%02o_%02o\r\n",
1124           //__func__, iomChar (iomUnitIdx), chan, dev_code);
1125 #endif
1126 
1127   uint ctlr_unit_idx        = get_ctlr_idx (iomUnitIdx, chan);
1128   uint unitIdx              = cables->urp_to_urd[ctlr_unit_idx][p->IDCW_DEV_CODE].unit_idx;
1129   struct rdr_state * statep = & rdr_state[unitIdx];
1130   statep->running           = true;
1131 
1132   iom_cmd_rc_t rc = IOM_CMD_PROCEED;
1133   // IDCW?
1134   if (IS_IDCW (p)) {
1135     // IDCW
1136     statep->io_mode = rdr_no_mode;
1137 
1138     switch (p->IDCW_DEV_CMD) {
1139       case 000: // CMD 00 Request status
1140         //sim_debug (DBG_DEBUG, & rdr_dev, "%s: Request Status\r\n", __func__);
1141         p->stati = 04000;
1142         // This is controller status, not device status
1143         //if (rdr_state[unitIdx].deckfd < 0)
1144           //p->stati = 04201; // hopper empty
1145 #if defined(TESTING)
1146         sim_printf ("Request status %04o\r\n", p->stati);
1147 #endif
1148         break;
1149 
1150       case 001: // CMD 01 Read binary
1151         //sim_debug (DBG_DEBUG, & rdr_dev, "%s: Read Binary\r\n", __func__);
1152         if (rdr_state [unitIdx].deckfd < 0) {
1153           p->stati        = 04201; // hopper empty
1154           p->tallyResidue = 0;
1155 #if defined(TESTING)
1156           if (! empty)
1157             sim_printf ("hopper empty\r\n");
1158           empty = true;
1159 #endif
1160           return IOM_CMD_DISCONNECT;
1161         }
1162         statep->io_mode = rdr_rd_bin;
1163         p->stati        = 04000;
1164         // This is controller status, not device status
1165         //if (rdr_state[unitIdx].deckfd < 0)
1166           //p->stati = 04201; // hopper empty
1167 #if defined(TESTING)
1168 sim_printf ("read binary %04o\r\n", p->stati);
1169 #endif
1170         break;
1171 
1172       case 040: // CMD 40 Reset status
1173         //sim_debug (DBG_DEBUG, & rdr_dev, "%s: Request Status\r\n", __func__);
1174         p->stati  = 04000;
1175         p->isRead = false;
1176         // This is controller status, not device status
1177         //if (rdr_state[unitIdx].deckfd < 0)
1178           //p->stati = 04201; // hopper empty
1179 #if defined(TESTING)
1180 sim_printf ("reset status %04o\r\n", p->stati);
1181 #endif
1182         break;
1183 
1184       default:
1185 #if defined(TESTING)
1186 sim_printf ("unknown  %o\r\n", p->IDCW_DEV_CMD);
1187 #endif
1188         if (p->IDCW_DEV_CMD != 051) // ignore bootload console probe
1189           sim_warn ("%s: RDR unrecognized device command  %02o\r\n", __func__, p->IDCW_DEV_CMD);
1190         p->stati      = 04501; // cmd reject, invalid opcode
1191         p->chanStatus = chanStatIncorrectDCW;
1192         return IOM_CMD_ERROR;
1193     } // switch IDCW_DEV_CMD
1194 
1195     //sim_debug (DBG_DEBUG, & rdr_dev, "%s: stati %04o\r\n", __func__, p->stati);
1196     return IOM_CMD_PROCEED;
1197   } // if IDCW
1198 
1199   // Not IDCW; TDCW are captured in IOM, so must be IOTD, IOTP or IOTNP
1200   switch (statep->io_mode) {
1201     case rdr_no_mode:
1202 #if defined(TESTING)
1203       sim_printf ("%s: Unexpected IOTx\r\n", __func__);
1204 #endif
1205       //sim_warn ("%s: Unexpected IOTx\r\n", __func__);
1206       //return IOM_CMD_ERROR;
1207       break;
1208 
1209     case rdr_rd_bin: {
1210       int rc = rdrReadRecord (iomUnitIdx, chan);
1211 #if defined(TESTING)
1212 sim_printf ("rdrReadRecord returned %d\r\n", rc);
1213 #endif
1214       if (rc)
1215         return IOM_CMD_DISCONNECT;
1216     }
1217     break;
1218 
1219     default:
1220       sim_warn ("%s: Unrecognized io_mode %d\r\n", __func__, statep->io_mode);
1221       return IOM_CMD_ERROR;
1222   }
1223   return rc;
1224 }
1225 
1226 static t_stat rdr_show_nunits (UNUSED FILE * st, UNUSED UNIT * uptr, UNUSED int val,
     /*  */
1227                                UNUSED const void * desc)
1228   {
1229     sim_printf("Number of RDR units in system is %d\r\n", rdr_dev . numunits);
1230     return SCPE_OK;
1231   }
1232 
1233 static t_stat rdr_set_nunits (UNUSED UNIT * uptr, UNUSED int32 value, const char * cptr,
     /*  */
1234                               UNUSED void * desc)
1235   {
1236     if (! cptr)
1237       return SCPE_ARG;
1238     int n = atoi (cptr);
1239     if (n < 1 || n > N_RDR_UNITS_MAX)
1240       return SCPE_ARG;
1241     rdr_dev . numunits = (uint32) n;
1242     return SCPE_OK;
1243   }
1244 
1245 static t_stat rdr_show_device_name (UNUSED FILE * st, UNIT * uptr,
     /*  */
1246                                     UNUSED int val, UNUSED const void * desc)
1247   {
1248     long n = RDR_UNIT_NUM (uptr);
1249     if (n < 0 || n >= N_RDR_UNITS_MAX)
1250       return SCPE_ARG;
1251     sim_printf("name     : %s", rdr_state [n] . device_name);
1252     return SCPE_OK;
1253   }
1254 
1255 static t_stat rdr_set_device_name (UNUSED UNIT * uptr, UNUSED int32 value,
     /*  */
1256                                    UNUSED const char * cptr, UNUSED void * desc)
1257   {
1258     long n = RDR_UNIT_NUM (uptr);
1259     if (n < 0 || n >= N_RDR_UNITS_MAX)
1260       return SCPE_ARG;
1261     if (cptr)
1262       {
1263         strncpy (rdr_state [n] . device_name, cptr, MAX_DEV_NAME_LEN - 1);
1264         rdr_state [n] . device_name [MAX_DEV_NAME_LEN - 1] = 0;
1265       }
1266     else
1267       rdr_state [n] . device_name [0] = 0;
1268     return SCPE_OK;
1269   }
1270 
1271 static t_stat rdr_set_path (UNUSED UNIT * uptr, UNUSED int32 value,
     /*  */
1272                             const UNUSED char * cptr, UNUSED void * desc)
1273   {
1274     if (! cptr)
1275       return SCPE_ARG;
1276 
1277     size_t len = strlen(cptr);
1278 
1279     // We check for length - (3 + length of rdr_name) to allow for the
1280     // null, a possible '/' being added and "rdrx" being added
1281     if (len >= (sizeof(rdr_path_prefix) - (strlen(rdr_name) + 3)))
1282       return SCPE_ARG;
1283 
1284     strncpy(rdr_path_prefix, cptr, sizeof(rdr_path_prefix) -1);
1285     rdr_path_prefix[sizeof(rdr_path_prefix) - 1] = '\0';
1286     if (len > 0)
1287       {
1288         if (rdr_path_prefix[len - 1] != '/')
1289           {
1290             if (len == sizeof(rdr_path_prefix) - 1)
1291               return SCPE_ARG;
1292             rdr_path_prefix[len++] = '/';
1293             rdr_path_prefix[len] = 0;
1294           }
1295       }
1296     return SCPE_OK;
1297   }
1298 
1299 static t_stat rdr_show_path (UNUSED FILE * st, UNUSED UNIT * uptr,
     /*  */
1300                              UNUSED int val, UNUSED const void * desc)
1301   {
1302     if (rdr_path_prefix [0])
1303       {
1304         sim_printf("\rPath to card reader directories is \"%s\".\r\n", rdr_path_prefix);
1305       }
1306     else
1307       {
1308         sim_printf("\rPath to card reader directories is unset.\r\n");
1309       }
1310     return SCPE_OK;
1311   }
/* */
root/src/dps8/dps8_crdrdr.c

DEFINITIONS
