-
Notifications
You must be signed in to change notification settings - Fork 1
/
dasdseq.c
1187 lines (1055 loc) · 48.9 KB
/
dasdseq.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
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
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* DASDSEQ.C (c) Copyright Roger Bowler, 1999-2012 */
/* (c) Copyright James M. Morrison, 2001-2010 */
/* Hercules DASD Utilities: Sequential dataset unloader */
/* Code borrowed from dasdpdsu Copyright 1999-2009 Roger Bowler */
/* Changes and additions Copyright 2001-2009, James M. Morrison */
/*-------------------------------------------------------------------*/
/* */
/* dasdseq */
/* */
/* This program retrieves a sequential (DSORG=PS) dataset from */
/* a Hercules CKD/CCKD volume. The input file is assumed to be */
/* encoded in the EBCDIC character set. */
/* */
/*-------------------------------------------------------------------*/
// We don't use some of the regular Hercules dasd routines because
// we want the DSCB as read from dasd so we can check some of the
// file attributes (such as DSORG, RECFM, LRECL).
// Dasdseq now uses the same case for the output dataset as the
// user specifies on the command line. Prior versions always
// used upper case, which seems unnecessarily loud.
#include "hstdinc.h"
#include "hercules.h"
typedef struct _DASD_VOL_LABEL {
/* dasd cyl 0 trk 0 record 3 */
/* identifies volser, owner, and VTOC location */
/* recorded in EBCDIC; 80 bytes in length */
BYTE vollabi[3]; // c'VOL'
BYTE volno; // volume label sequence #
BYTE volserno[6]; // volume serial
BYTE security; // security field, set to 0xc0
BYTE volvtoc[5]; // CCHHR of VTOC's F4DSCB
BYTE resv1[21]; // reserved; should be left blank
BYTE volowner[14]; // volume owner
BYTE resv2[29]; // reserved; should be left blank
} DASD_VOL_LABEL;
#include "dasdblks.h"
#ifndef MAX_EXTENTS // see getF3dscb for notes
#define MAX_EXTENTS 123 // maximum supported dataset extents
#endif
typedef struct _DADSM {
DASD_VOL_LABEL volrec; // volume label record
FORMAT4_DSCB f4buf; // F4 DSCB
DSXTENT f4ext; // VTOC extent info
FORMAT3_DSCB f3buf; // F3 DSCB
FORMAT1_DSCB f1buf; // F1 DSCB
int f1numx; // # valid dataset extents
DSXTENT f1ext[MAX_EXTENTS]; // dsn extent info
} DADSM;
//----------------------------------------------------------------------------------
// Globals
//----------------------------------------------------------------------------------
int local_verbose = 0; // verbose setting
int copy_verbose = 0; // verbose setting for copyfile
char *din; // dasd image filename
char *sfn; // shadow file parm
int absvalid = 0; // 1 = -abs specified, use CCHH not dsn
char *argdsn; // MVS dataset name
int expert = 0; // enable -abs help
int tran_ascii = 0; // 1 = ascii output
#ifdef DEBUG
int debug = 1; // enable debug code
#else
int debug = 0; // disable debug code
#endif
void sayext(int max, DSXTENT *extent) {
int i;
fprintf(stderr, " EXTENT --begin-- ---end---\n");
fprintf(stderr, "TYPE NUMBER CCCC HHHH CCCC HHHH\n");
for (i = 0; i < max; i++) {
int bcyl = (extent[i].xtbcyl[0] << 8) | extent[i].xtbcyl[1];
int btrk = (extent[i].xtbtrk[0] << 8) | extent[i].xtbtrk[1];
int ecyl = (extent[i].xtecyl[0] << 8) | extent[i].xtecyl[1];
int etrk = (extent[i].xtetrk[0] << 8) | extent[i].xtetrk[1];
fprintf(stderr, " %2.2X %2.2X %4.4X %4.4X %4.4X %4.4X\n",
extent[i].xttype, extent[i].xtseqn, bcyl, btrk, ecyl, etrk);
}
} /* sayext */
//----------------------------------------------------------------------------------
// Display selected F1 DSCB information
//----------------------------------------------------------------------------------
void showf1( FILE *fmsg,
FORMAT1_DSCB *f1dscb,
DSXTENT extent[],
int verbose) {
int i, dsorg, lrecl, blksize, volseq, x, y, num_extents;
char volser[sizeof(f1dscb->ds1dssn) + 1];
char dsn[sizeof(f1dscb->ds1dsnam) + 1];
char txtcredt[9]; // creation date
char txtexpdt[9] = "(n/a)"; // expiration date
char txtscr[20];
char txtsyscd[14];
char txtdsorg[5] = ""; // dsorg text
char txtrecfm[5] = ""; // recfm text
if (verbose > 2) {
fprintf(fmsg, "showf1 F1 DSCB\n");
data_dump(f1dscb, sizeof(FORMAT1_DSCB));
}
make_asciiz(dsn, sizeof(dsn),
f1dscb->ds1dsnam, sizeof(f1dscb->ds1dsnam));
make_asciiz(volser, sizeof(volser),
f1dscb->ds1dssn, sizeof(f1dscb->ds1dssn));
volseq = (f1dscb->ds1volsq[0] << 8) | (f1dscb->ds1volsq[1]);
x = f1dscb->ds1credt[0] + 1900;
y = (f1dscb->ds1credt[1] << 8) | f1dscb->ds1credt[2];
sprintf(txtcredt, "%4.4d", x);
strcat(txtcredt, ".");
sprintf(txtscr, "%3.3d", y);
strcat(txtcredt, txtscr);
if (f1dscb->ds1expdt[0] || f1dscb->ds1expdt[1] || f1dscb->ds1expdt[2]) {
x = f1dscb->ds1expdt[0] + 1900;
y = (f1dscb->ds1expdt[1] << 8) | f1dscb->ds1expdt[2];
sprintf(txtexpdt, "%4.4d", x);
strcat(txtexpdt, ".");
sprintf(txtscr, ".%3.3d", y);
strcat(txtexpdt, txtscr);
}
num_extents = f1dscb->ds1noepv;
// Field ignored: ds1nobdb (# bytes used in last PDS dir blk)
make_asciiz(txtsyscd, sizeof(txtsyscd),
f1dscb->ds1syscd, sizeof(f1dscb->ds1syscd));
dsorg = (f1dscb->ds1dsorg[0] << 8) | (f1dscb->ds1dsorg[1]);
if (dsorg & (DSORG_IS * 256)) strcpy(txtdsorg, "IS");
if (dsorg & (DSORG_PS * 256)) strcpy(txtdsorg, "PS");
if (dsorg & (DSORG_DA * 256)) strcpy(txtdsorg, "DA");
if (dsorg & (DSORG_PO * 256)) strcpy(txtdsorg, "PO");
if (dsorg & DSORG_AM) strcpy(txtdsorg, "VS");
if (txtdsorg[0] == '\0') strcpy(txtdsorg, "??");
if (dsorg & (DSORG_U * 256)) strcat(txtdsorg, "U");
if (f1dscb->ds1recfm & RECFM_FORMAT_F) strcpy(txtrecfm, "F");
if (f1dscb->ds1recfm & RECFM_FORMAT_V) strcpy(txtrecfm, "V");
if ((f1dscb->ds1recfm & RECFM_FORMAT_U) == RECFM_FORMAT_U)
strcpy(txtrecfm, "U");
if (f1dscb->ds1recfm & RECFM_BLOCKED) strcat(txtrecfm, "B");
if (f1dscb->ds1recfm & RECFM_SPANNED) strcat(txtrecfm, "S");
if (f1dscb->ds1recfm & RECFM_CTLCHAR_A) strcat(txtrecfm, "A");
if (f1dscb->ds1recfm & RECFM_CTLCHAR_M) strcat(txtrecfm, "M");
if (f1dscb->ds1recfm & RECFM_TRKOFLOW) strcat(txtrecfm, "T");
// Field ignored: ds1optcd (option codes, same as in DCB)
blksize = (f1dscb->ds1blkl[0] << 8) | f1dscb->ds1blkl[1];
lrecl = (f1dscb->ds1lrecl[0] << 8) | f1dscb->ds1lrecl[1];
// Field ignored: ds1keyl (key length)
// Field ignored: ds1rkp (relative key position)
// Field ignored: ds1dsind (data set indicators)
// Field ignored: ds1scalo (secondary allocation)
// Field ignored: ds1lstar (pointer to last written block; ttr)
// Field ignored: ds1trbal (bytes remaining on last track used)
// Extent information was passed to us, so we ignore what's in F1DSCB
fprintf(fmsg, "Dataset %s on volume %s sequence %d\n", dsn, volser, volseq);
fprintf(fmsg, "Created %s expires %s\n", txtcredt, txtexpdt);
fprintf(fmsg, "Dsorg=%s recfm=%s lrecl=%d blksize=%d\n",
txtdsorg, txtrecfm, lrecl, blksize);
fprintf(fmsg, "System code %s\n", txtsyscd);
if (verbose > 1) {
fprintf(stderr, "Dataset has %d extent(s)\n", num_extents);
if (verbose > 2)
data_dump((void *)extent, sizeof(DSXTENT) * MAX_EXTENTS);
fprintf(stderr, "Extent Information:\n");
fprintf(stderr, " EXTENT --begin-- ---end---\n");
fprintf(stderr, "TYPE NUMBER CCCC HHHH CCCC HHHH\n");
for (i = 0; i < num_extents; i++) {
int bcyl = (extent[i].xtbcyl[0] << 8) | extent[i].xtbcyl[1];
int btrk = (extent[i].xtbtrk[0] << 8) | extent[i].xtbtrk[1];
int ecyl = (extent[i].xtecyl[0] << 8) | extent[i].xtecyl[1];
int etrk = (extent[i].xtetrk[0] << 8) | extent[i].xtetrk[1];
fprintf(stderr, " %2.2X %2.2X %4.4X %4.4X %4.4X %4.4X\n",
extent[i].xttype, extent[i].xtseqn, bcyl, btrk, ecyl, etrk);
}
}
return;
} /* showf1 */
//----------------------------------------------------------------------------------
// Copy DSORG=PS RECFM=F[B] dataset to output file
//
// Input:
// fout FILE * (opened "w" for ascii, "wb" for ebcdic)
// cif dasdutil control block
// f1dscb F1 DSCB
// extent dataset extent array
// tran 0 = ebcdic output, 1 = ascii output
// ascii output will have trailing blanks removed
// verbose 0 = no status messages
// 1 = status messages
// > 1 debugging messages
// > 2 dump read record
// > 3 dump written record
// > 4 dump read record from input buffer
// Output:
// File written, messages displayed on stderr
// Returns -1 on error, else returns # records written
// Notes:
// Caller is responsible for opening and closing fout.
//
// The F1 DSCB's DS1LSTAR field is used to determine EOF (absent a prior
// EOF being encountered), since some datasets don't have an EOF marker
// present. On my MVSRES, for instance, SYS1.BRODCAST has no EOF marker.
//
// 2003-01-14 jmm DS1LSTAR may be zero; if so, ignore DS1LSTAR and
// hope for valid EOF.
//----------------------------------------------------------------------------------
int fbcopy( FILE *fout,
CIFBLK *cif,
DADSM *dadsm,
int tran,
int verbose) {
FORMAT1_DSCB *f1dscb = &dadsm->f1buf;
DSXTENT extent[MAX_EXTENTS];
int rc, trk = 0, trkconv = 999, rec = 1;
int cyl = 0, head = 0, rc_rb, len, offset;
int rc_copy = 0;
int recs_written = 0, lrecl, num_extents;
int lstartrack = 0, lstarrec = 0, lstarvalid = 0;
BYTE *buffer;
char *pascii = NULL;
char zdsn[sizeof(f1dscb->ds1dsnam) + 1]; // ascii dsn
// Kludge to avoid rewriting this code (for now):
memcpy(&extent, (void *)&(dadsm->f1ext), sizeof(extent));
num_extents = f1dscb->ds1noepv;
lrecl = (f1dscb->ds1lrecl[0] << 8) | (f1dscb->ds1lrecl[1]);
if (absvalid) {
strcpy(zdsn, argdsn);
if (debug) fprintf(stderr, "fbcopy absvalid\n");
} else {
make_asciiz(zdsn, sizeof(zdsn),
f1dscb->ds1dsnam, sizeof(f1dscb->ds1dsnam));
if ((f1dscb->ds1lstar[0] !=0) ||
(f1dscb->ds1lstar[1] != 0) ||
(f1dscb->ds1lstar[2] != 0)) {
lstartrack = (f1dscb->ds1lstar[0] << 8) | (f1dscb->ds1lstar[1]);
lstarrec = f1dscb->ds1lstar[2];
lstarvalid = 1; // DS1LSTAR valid
}
}
if (debug) {
fprintf(stderr, "fbcopy zdsn %s\n", zdsn);
fprintf(stderr, "fbcopy num_extents %d\n", num_extents);
fprintf(stderr, "fbcopy lrecl %d\n", lrecl);
fprintf(stderr, "fbcopy F1 DSCB\n");
data_dump(f1dscb, sizeof(FORMAT1_DSCB));
sayext(num_extents, (void *)&extent);
}
if (verbose) // DS1LSTAR = last block written TTR
fprintf(stderr,
"fbcopy DS1LSTAR %2.2X%2.2X%2.2X lstartrack %d "
"lstarrec %d lstarvalid %d\n",
f1dscb->ds1lstar[0], f1dscb->ds1lstar[1], f1dscb->ds1lstar[2],
lstartrack, lstarrec, lstarvalid);
if (tran) { // need ASCII translation buffer?
pascii = malloc(lrecl + 1);
if (pascii == NULL) {
fprintf(stderr, "fbcopy unable to allocate ascii buffer\n");
return -1;
}
}
while (1) { // output records until something stops us
// Honor DS1LSTAR when valid
if ((lstarvalid) && (trk == lstartrack) && (rec > lstarrec)) {
if (verbose)
fprintf(stderr, "fbcopy DS1LSTAR indicates EOF\n"
"fbcopy DS1LSTAR %2.2X%2.2X%2.2X "
"track %d record %d\n",
f1dscb->ds1lstar[0], f1dscb->ds1lstar[1],
f1dscb->ds1lstar[2], trk, rec);
rc_copy = recs_written;
break;
}
// Convert TT to CCHH for upcoming read_block call
if (trkconv != trk) { // avoid converting for each block
trkconv = trk; // current track converted
rc = convert_tt(trk, num_extents, extent, cif->heads, &cyl, &head);
if (rc < 0) {
fprintf(stderr,
"fbcopy convert_tt track %5.5d, rc %d\n", trk, rc);
if (absvalid)
rc_copy = recs_written;
else
rc_copy = -1;
break;
}
if (verbose > 1)
fprintf(stderr, "fbcopy convert TT %5.5d CCHH %4.4X %4.4X\n",
trk, cyl, head);
}
// Read block from dasd
if (verbose > 2)
fprintf(stderr, "fbcopy reading track %d "
"record %d CCHHR = %4.4X %4.4X %2.2X\n",
trk, rec, cyl, head, rec);
rc_rb = read_block(cif, cyl, head, rec, NULL, NULL, &buffer, &len);
if (rc_rb < 0) { // error
fprintf(stderr, "fbcopy error reading %s, rc %d\n", zdsn, rc_rb);
rc_copy = -1;
break;
}
// Handle end of track return from read_block
if (rc_rb > 0) { // end of track
if (verbose > 2)
fprintf(stderr, "fbcopy End Of Track %d rec %d\n", trk, rec);
trk++; // next track
rec = 1; // record 1 on new track
continue;
}
// Check for dataset EOF
if (len == 0) { // EOF
if (verbose)
fprintf(stderr, "fbcopy EOF track %5.5d rec %d\n", trk, rec);
if (absvalid) { // capture as much -abs data as possible
if (verbose) fprintf(stderr, "fbcopy ignoring -abs EOF\n");
} else {
rc_copy = recs_written;
break;
}
}
if (verbose > 3)
fprintf(stderr, "fbcopy read %d bytes\n", len);
if (verbose > 2) {
data_dump(buffer, len);
fprintf(stderr, "\n");
}
// Deblock input dasd block, write records to output dataset
for (offset = 0; offset < len; offset += lrecl) {
if (verbose > 3) {
fprintf(stderr, "fbcopy offset %d length %d rec %d\n",
offset, lrecl, recs_written);
}
if (tran) { // ASCII output
memset(pascii, 0, lrecl + 1);
make_asciiz(pascii, lrecl + 1, buffer + offset, lrecl);
if (verbose > 4) {
fprintf(stderr, "fbcopy buffer offset %d rec %d\n",
offset, rec);
data_dump(buffer + offset, lrecl);
}
if (verbose > 3) {
fprintf(stderr, "->%s<-\n", pascii);
data_dump(pascii, lrecl);
}
fprintf(fout, "%s\n", pascii);
} else { // EBCDIC output
if (verbose > 3) {
fprintf(stderr, "fbcopy EBCDIC buffer\n");
data_dump(buffer + offset, lrecl);
}
fwrite(buffer + offset, lrecl, 1, fout);
}
if (ferror(fout)) {
fprintf(stderr, "fbcopy error writing %s\n", zdsn);
fprintf(stderr, "%s\n", strerror(errno));
rc_copy = -1;
}
recs_written++;
}
if (rc_copy != 0)
break;
else
rec++; // next record on track
} /* while (1) */
if (pascii)
free(pascii); // release ASCII conversion buffer
return rc_copy;
} /* fbcopy */
//----------------------------------------------------------------------------------
// Given extent information, place it into appropriate extent table entry
//----------------------------------------------------------------------------------
void makext(
int i, // extent #
int heads, // # heads per cylinder on device
DSXTENT *extent, // extent table entry
int startcyl, // start cylinder
int starttrk, // start track
int size) { // extent size in tracks
int endcyl = ((startcyl * heads) + starttrk + size - 1) / heads;
int endtrk = ((startcyl * heads) + starttrk + size - 1) % heads;
if (i > (MAX_EXTENTS - 1)) {
fprintf(stderr,
"makext extent # parm invalid %d, abort\n", i);
exit(4);
}
extent[i].xttype = 1; // extent type
extent[i].xtseqn = i; // extent # (relative zero)
extent[i].xtbcyl[0] = startcyl >> 8; // begin cyl
extent[i].xtbcyl[1] = startcyl - ((startcyl / 256) * 256);
extent[i].xtbtrk[0] = starttrk >> 8;
extent[i].xtbtrk[1] = starttrk - ((starttrk / 256) * 256);
extent[i].xtecyl[0] = endcyl >> 8; // end cyl
extent[i].xtecyl[1] = endcyl - ((endcyl / 256) * 256);
extent[i].xtetrk[0] = endtrk >> 8;
extent[i].xtetrk[1] = endtrk - ((endtrk / 256) * 256); // end track
return;
} /* makext */
//----------------------------------------------------------------------------------
// showhelp - display syntax help
//----------------------------------------------------------------------------------
void showhelp() {
fprintf(stderr, (expert) ?
"Usage: dasdseq [-debug] [-expert] [-ascii] image [sf=shadow] [attr] filespec\n"
" -debug optional - Enables debug mode, additional debug help appears\n"
:
"Usage: dasdseq [-expert] [-ascii] image [sf=shadow] filespec\n");
fprintf(stderr,
" -expert optional - Additional help describes expert operands\n"
" -ascii optional - translate output file to ascii, trim trailing blanks\n"
" image required - [path/]filename of dasd image file (dasd volume)\n"
" shadow optional - [path/]filename of shadow file (note sf=)\n");
if (expert)
fprintf(stderr,
" ALL EXPERT FACILITIES ARE EXPERIMENTAL\n"
" attr optional - dataset attributes (only useful with -abs)\n"
" attr syntax: [-recfm fb] [-lrecl aa]\n"
" -recfm designates RECFM, reserved for future support\n"
" fb - fixed, blocked (only RECFM currently supported)\n"
" -lrecl designates dataset LRECL\n"
" aa - decimal logical record length (default 80)\n"
" Blocksize need not be specified; dasdseq handles whatever\n"
" block size comes off the volume.\n"
" filespec required (optional sub-operands in the following order):\n"
" [-heads xx]\n"
" [-abs cc hh tt] [...] [-abs cc hh tt ]\n"
" filename\n"
" When -abs is -not- specified,\n"
" Filename specifies the MVS DSORG=PS dataset on the volume.\n"
" The dasd image volume containing the dataset must have a valid VTOC\n"
" structure, and a F1 DSCB describing the dataset.\n"
" Specifying -debug will (eventually) display extent information.\n"
" When -abs is specified, each -abs group specifies one dataset extent.\n"
" For multi-extent datasets, -abs groups may be repeated as needed,\n"
" in the order in which the dataset's extents occur.\n"
" A maximum of %d extents are supported.\n"
" No VTOC structure is implied, a F1 DSCB will not be sought.\n"
" Dasdseq will frequently report 'track not found in extent table'\n"
" (along with a message from fbcopy about rc -1 from convert_tt)\n"
" due to potentially missing EOF markers in the extent, and the\n"
" fact that the F1 DSCB DS1LSTAR field is not valid.\n"
" Check your output file before you panic.\n"
" Fbcopy ignores EOF, in case you are attempting to recovery PDS\n"
" member(s) from a damaged dasd volume, preferring to wait until\n"
" all tracks in the extent have been processed.\n"
" Tracks containing PDS members may have more than one EOF per track.\n"
" Expect a lot of associated manual effort with -abs.\n"
" -heads defines # tracks per cylinder on device;\n"
" xx - decimal number of heads per cylinder on device\n"
" default xx = 15 (valid for 3380s, 3390s)\n"
" -abs indicates the beginning of each extent's location in terms of\n"
" absolute dasd image location.\n"
" cc - decimal cylinder number (relative zero)\n"
" hh - decimal head number (relative zero)\n"
" tt - decimal number of tracks in extent\n"
" filename will be the filename of the output file in the current directory;\n"
" output filename in the same case as the command line filename.\n",
MAX_EXTENTS);
else fprintf(stderr,
" filespec required - MVS dataset name of DSORG=PS dataset, output filename\n");
if (debug)
fprintf(stderr, "\n"
"Debugging options (at end of dasdseq command)\n"
" [verbose [x [y [z]]]]\n\n"
" verbose debug output level (default = 0 when not specified)\n"
" x main program (default = 1 when verbose specified)\n"
" y copyfile + showf1\n"
" z dasdutil\n"
" Higher numbers produces more output\n");
return;
} /* showhelp */
//----------------------------------------------------------------------------------
// parsecmd - parse command line; results stored in program globals
//----------------------------------------------------------------------------------
int parsecmd(int argc, char **argv, DADSM *dadsm) {
int util_verbose = 0; // Hercules dasdutil.c diagnostic level
int heads = 15; // # heads per cylinder on device
int extnum = 0; // extent number for makext()
int abscyl = 0; // absolute CC (default 0)
int abshead = 0; // absolute HH (default 0)
int abstrk = 1; // absolute tracks (default 1)
int lrecl = 80; // default F1 DSCB lrecl
// Usage: dasdseq [-debug] [-expert] [-ascii] image [sf=shadow] [attr] filespec
argv++; // skip dasdseq command argv[0]
if ((*argv) && (strcasecmp(*argv, "-debug") == 0)) {
argv++;
debug = 1;
fprintf(stderr, "Command line DEBUG specified\n");
}
if ((*argv) && (strcasecmp(*argv, "-expert") == 0)) {
argv++;
expert = 1;
if (debug) fprintf(stderr, "EXPERT mode\n");
}
if ((*argv) && (strcasecmp(*argv, "-ascii") == 0)) {
argv++;
tran_ascii = 1;
if (debug) fprintf(stderr, "ASCII translation enabled\n");
}
if (*argv) din = *argv++; // dasd image filename
if (debug) fprintf(stderr, "IMAGE %s\n", din);
if (*argv && strlen(*argv) > 3 && !memcmp(*argv, "sf=", 3)) {
sfn = *argv++; // shadow file parm
} else
sfn = NULL;
if (debug) fprintf(stderr, "SHADOW %s\n", sfn);
dadsm->f1buf.ds1recfm =
RECFM_FORMAT_F | RECFM_BLOCKED; // recfm FB for fbcopy
if ((*argv) && (strcasecmp(*argv, "-recfm") == 0)) {
argv++; // skip -recfm
if ((*argv) && (strcasecmp(*argv, "fb") == 0)) {
argv++; // skip fb
if (debug) fprintf(stderr, "RECFM fb\n");
} else {
argv++; // skip bad recfm
fprintf(stderr, "Unsupported -recfm value %s\n", *argv);
}
}
if ((*argv) && (strcasecmp(*argv, "-lrecl") == 0)) {
argv++; // skip -lrecl
if (*argv) lrecl = atoi(*argv++); // lrecl value
if (debug) fprintf(stderr, "LRECL %d\n", lrecl);
}
dadsm->f1buf.ds1lrecl[0] = lrecl >> 8; // for fbcopy
dadsm->f1buf.ds1lrecl[1] = lrecl - ((lrecl >> 8) << 8);
if ((*argv) && (strcasecmp(*argv, "-heads") == 0)) {
argv++; // skip -heads
if (*argv) heads = atoi(*argv++); // heads value
}
if (debug) fprintf(stderr, "HEADS %d\n", heads);
if ((*argv) &&
(strcasecmp(*argv, "-abs") == 0)) {
absvalid = 1; // CCHH valid
while ((*argv) && (strcasecmp(*argv, "-abs") == 0)) {
argv++; // skip -abs
abscyl = 0; abshead = 0; abstrk = 1; // defaults
if (*argv) abscyl = atoi(*argv++); // abs cc
if (*argv) abshead = atoi(*argv++); // abs hh
if (*argv) abstrk = atoi(*argv++); // abs tracks
// Build extent entry for -abs group
makext(extnum, heads,
(DSXTENT *) &dadsm->f1ext, abscyl, abshead, abstrk);
extnum++;
dadsm->f1buf.ds1noepv = extnum; // for fbcopy
if (debug) fprintf(stderr, "Absolute CC %d HH %d tracks %d\n",
abscyl, abshead, abstrk);
if (extnum > MAX_EXTENTS) {
fprintf(stderr, "Too many extents, abort\n");
exit(3);
}
}
// if (debug) sayext(MAX_EXTENTS, dadsm->f1ext);// show extent table
}
if (debug) {
fprintf(stderr, "parsecmd completed F1 DSCB\n");
data_dump(&dadsm->f1buf, sizeof(FORMAT1_DSCB));
}
if (*argv) argdsn = *argv++; // [MVS dataset name/]output filename
if (debug) fprintf(stderr, "DSN %s\n", argdsn);
if ((*argv) && ( // support deprecated 'ascii' operand
(strcasecmp(*argv, "ascii") == 0) ||
(strcasecmp(*argv, "-ascii") == 0)
)
) {
argv++;
tran_ascii = 1;
if (debug) fprintf(stderr, "ASCII translation enabled\n");
}
set_verbose_util(0); // default util verbosity
if ((*argv) && (strcasecmp(*argv, "verbose") == 0)) {
local_verbose = 1;
argv++;
if (*argv) local_verbose = atoi(*argv++);
if (*argv) copy_verbose = atoi(*argv++);
if (*argv) {
util_verbose = atoi(*argv++);
set_verbose_util(util_verbose);
if (debug) fprintf(stderr, "Utility verbose %d\n", util_verbose);
}
}
// If the user specified expert mode without -abs, give help & exit
// Additionally, if the user has "extra" parms, show help & exit
// No "extraneous parms" message is issued, since some of the code
// above forces *argv to be true when it wants help displayed
if ((argc < 3) || (*argv) || ((expert) && (!absvalid))) {
showhelp(); // show syntax before bailing
exit(2);
}
return 0;
} /* parsecmd */
//----------------------------------------------------------------------------------
// getlabel - retrieve label record from dasd volume image
//----------------------------------------------------------------------------------
//
// Input:
// cif ptr to opened CIFBLK of dasd image
// glbuf ptr to 80 byte buffer provided by caller
// verbose 0 = no status messages
// 1 = status messages
// > 1 debugging messages
//
// Output:
// glbuf dasd volume label record
//
// Returns: 0 OK, else error
//
// Notes:
// The volume label record always resides at CCHHR 0000 0000 03.
// The dasd volume label record contains the CCHHR of the VTOC.
// The volume label record is copied to the caller's buffer.
//----------------------------------------------------------------------------------
int getlabel(
CIFBLK *cif,
DASD_VOL_LABEL *glbuf,
int verbose) {
int len, rc;
void *plabel;
if (verbose) fprintf(stderr, "getlabel reading volume label\n");
rc = read_block(cif, 0, 0, 3, NULL, NULL, (void *) &plabel, &len);
if (rc) {
fprintf(stderr, "getlabel error reading volume label, rc %d\n", rc);
return 1;
}
if (len != sizeof(DASD_VOL_LABEL)) {
fprintf(stderr, "getlabel error: volume label %d, not 80 bytes long\n", len);
return 2;
}
memcpy((void *)glbuf, plabel, sizeof(DASD_VOL_LABEL));
if (verbose > 1) {
fprintf(stderr, "getlabel volume label\n");
data_dump(glbuf, len);
}
return 0;
} /* getlabel */
//----------------------------------------------------------------------------------
// getF4dscb - retrieve Format 4 DSCB - VTOC self-descriptor record
//----------------------------------------------------------------------------------
//
// Input:
// cif ptr to opened CIFBLK of dasd image containing dataset
// f4dscb ptr to F4 DSCB buffer (key & data)
// volrec ptr to buffer containing volume label rec
// vtocx ptr to VTOC extent array (one extent only)
// verbose 0 = no status messages
// 1 = status messages
// > 1 debugging messages
//
// Output:
// f4buf F4 DSCB in buffer (44 byte key, 96 bytes of data)
// vtocx VTOC extent array updated
//
// Returns: 0 OK, else error
//
// Notes:
// There should only be one F4 DSCB in the VTOC, and it should always be
// the first record in the VTOC. The F4 provides VTOC extent information,
// anchors free space DSCBs, and provides information about the device on
// which the VTOC resides.
//----------------------------------------------------------------------------------
int getF4dscb(
CIFBLK *cif,
FORMAT4_DSCB *f4dscb,
DASD_VOL_LABEL *volrec,
DSXTENT *vtocx,
int verbose) {
char vtockey[sizeof(f4dscb->ds4keyid)];
void *f4key, *f4data;
int f4kl, f4dl;
int cyl, head, rec, rc;
// Extract VTOC's CCHHR from volume label
cyl = (volrec->volvtoc[0] << 8) | volrec->volvtoc[1];
head = (volrec->volvtoc[2] << 8) | volrec->volvtoc[3];
rec = volrec->volvtoc[4];
if (verbose > 1)
fprintf(stderr, "getF4dscb VTOC F4 at cyl %d head %d rec %d\n", cyl, head, rec);
// Read VTOC's Format 4 DSCB (VTOC self-descriptor)
if (verbose)
fprintf(stderr, "getF4dscb reading VTOC F4 DSCB\n");
rc = read_block(cif, cyl, head, rec, (void *) &f4key, &f4kl, (void *) &f4data, &f4dl);
if (rc) {
fprintf(stderr, "getF4dscb error reading F4 DSCB, rc %d\n", rc);
return 1;
}
// Verify correct key and data length
if ((f4kl != sizeof(f4dscb->ds4keyid)) ||
(f4dl != (sizeof(FORMAT4_DSCB) - sizeof(f4dscb->ds4keyid)))) {
fprintf(stderr, "getF4dscb erroneous key length %d or data length %d\n",
f4kl, f4dl);
return 2;
}
// Return data to caller
memcpy((void *) &f4dscb->ds4keyid, f4key, f4kl); // copy F4 key into buffer
memcpy((void *) &f4dscb->ds4fmtid, f4data, f4dl); // copy F4 data into buffer
memcpy((void *) vtocx, (void *)&f4dscb->ds4vtoce,
sizeof(f4dscb->ds4vtoce)); // copy VTOC extent entry
if (verbose > 1) {
fprintf(stderr, "getF4dscb F4 DSCB\n");
data_dump((void *) f4dscb, sizeof(FORMAT4_DSCB));
}
// Verify DS4FMTID byte = x'F4', DS4KEYID key = x'04', and DS4NOEXT = x'01'
// Do this after copying data to caller's buffer so we can use struct fields
// rather than having to calculate offset to verified data; little harm done
// if it doesn't verify since we're toast if they're bad.
memset(vtockey, 0x04, sizeof(vtockey));
if ((f4dscb->ds4fmtid != 0xf4) ||
(f4dscb->ds4noext != 0x01) ||
(memcmp(&f4dscb->ds4keyid, vtockey, sizeof(vtockey)))) {
fprintf(stderr, "getF4dscb "
"VTOC format id byte invalid (DS4IDFMT) %2.2X, \n"
"VTOC key invalid, or multi-extent VTOC\n",
f4dscb->ds4fmtid);
return 3;
}
// Display VTOC extent info (always one extent, never more)
if (verbose > 1) {
fprintf (stderr, "getF4dscb "
"VTOC start CCHH=%2.2X%2.2X %2.2X%2.2X "
"end CCHH=%2.2X%2.2X %2.2X%2.2X\n",
vtocx->xtbcyl[0], vtocx->xtbcyl[1],
vtocx->xtbtrk[0], vtocx->xtbtrk[1],
vtocx->xtecyl[0], vtocx->xtecyl[1],
vtocx->xtetrk[0], vtocx->xtetrk[1]);
}
return 0;
} /* getF4dscb */
//----------------------------------------------------------------------------------
// getF1dscb - retrieve Format 1 DSCB
//----------------------------------------------------------------------------------
//
// Input:
// cif ptr to opened CIFBLK of dasd image containing dataset
// zdsn ASCII null-terminated dataset name
// f1dscb ptr to F1 DSCB buffer (key & data)
// vtocext ptr to VTOC's extent info
// verbose 0 = no status messages
// 1 = status messages
// > 1 debugging messages
//
// Output:
// f1buf F1 DSCB (44 byte key, 96 byte data)
//
// Returns: 0 OK, else error
//
// Notes: The F1 DSCB describes the MVS dataset's physical and logical attributes
// such as RECFM, LRECL, BLKSIZE, and where on the volume the dataset
// resides (the extent information). The first 3 possible extents are
// described in the F1 DSCB. If additional extents are allocated, they
// are described by F3 DSCBs referred to by the F1 DSCB.
//----------------------------------------------------------------------------------
int getF1dscb(
CIFBLK *cif,
char *pdsn[],
FORMAT1_DSCB *f1dscb,
DSXTENT *vtocext[],
int verbose) {
char zdsn[sizeof(f1dscb->ds1dsnam) + 1]; // zASCII dsn
BYTE edsn[sizeof(f1dscb->ds1dsnam)]; // EBCDIC dsn
void *f1key, *f1data;
int f1kl, f1dl;
int cyl, head, rec, rc;
int vtocextents = 1; // VTOC has only one extent
// Locate dataset's F1 DSCB
memset(zdsn, 0, sizeof(zdsn));
strncpy(zdsn, *pdsn, sizeof(zdsn) - 1);
string_to_upper(zdsn);
convert_to_ebcdic(edsn, sizeof(edsn), zdsn);
if (verbose)
fprintf(stderr, "getF1dscb searching VTOC for %s\n", zdsn);
rc = search_key_equal(cif, edsn, sizeof(edsn),
vtocextents, (DSXTENT *)vtocext,
&cyl, &head, &rec);
if (rc) {
fprintf(stderr, "getF1dscb search_key_equal rc %d\n", rc);
if (verbose) {
fprintf(stderr, "getF1dscb key\n");
data_dump(edsn, sizeof(edsn));
}
if (rc == 1)
fprintf(stderr, "getF1dscb no DSCB found for %s\n", zdsn);
return 1;
}
// Read F1 DSCB describing dataset
if (verbose)
fprintf(stderr, "getF1dscb reading F1 DSCB\n");
rc = read_block(cif, cyl, head, rec,
(void *)&f1key, &f1kl,
(void *) &f1data, &f1dl);
if (rc) {
fprintf(stderr, "getF1dscb error reading F1 DSCB, rc %d\n", rc);
return 2;
}
// Return data to caller
if ((f1kl == sizeof(f1dscb->ds1dsnam)) &&
(f1dl == (sizeof(FORMAT1_DSCB) - sizeof(f1dscb->ds1dsnam)))) {
memcpy((void *) &f1dscb->ds1dsnam,
f1key, f1kl); // copy F1 key to buffer
memcpy((void *) &f1dscb->ds1fmtid,
f1data, f1dl); // copy F1 data to buffer
} else {
fprintf(stderr, "getF1dscb bad key %d or data length %d\n",
f1kl, f1dl);
return 3;
}
if (verbose > 1) {
fprintf(stderr, "getF1dscb F1 DSCB\n");
data_dump((void *) f1dscb, sizeof(FORMAT1_DSCB));
}
// Verify DS1FMTID byte = x'F1'
// Do this after copying data to caller's buffer so we can use struct fields
// rather than having to calculate offset to verified data; little harm done
// if it doesn't verify since we're toast if it's bad.
if (f1dscb->ds1fmtid != 0xf1) {
fprintf(stderr, "getF1dscb "
"F1 DSCB format id byte invalid (DS1IDFMT) %2.2X\n",
f1dscb->ds1fmtid);
return 4;
}
return 0;
} /* getF1dscb */
//----------------------------------------------------------------------------------
// getF3dscb - Retrieve Format 3 DSCB
//----------------------------------------------------------------------------------
//
// Input:
// cif ptr to opened CIFBLK of dasd image containing dataset
// f3cchhr CCHHR of F3 DSCB to be read (key & data)
// f3dscb ptr to F3 DSCB buffer
// verbose 0 = no status messages
// 1 = status messages
// > 1 debugging messages
//
// Output:
// f3buf F3 DSCB (44 byte key, 96 byte data)
//
// Returns: 0 OK, else error
//
// Notes: The F3 DSCB describes additional dataset extents beyond those
// described by the F1 DSCB. Each F3 DSCB describes 13 extents.
// Physical sequential datasets are limited to 16 extents on each
// volume, extended format datasets are limited to 123 extents on
// each volume. Dasdseq doesn't provide explicit support for
// multi-volume datasets.
//
// Note there is extent information embedded in the key.
//
// If you want support for > 16 extents, you will have to recompile
// dasdseq after changing MAX_EXTENTS.
//
// Warning: I haven't tested the "chase the F3 chain" code, as I have no
// reasonable way to do so. The highest level of MVS I can run under
// Hercules is MVS38j.
//----------------------------------------------------------------------------------
int getF3dscb(
CIFBLK *cif,
BYTE *f3cchhr,
FORMAT3_DSCB *f3dscb,
int verbose) {
int cyl, head, rec, rc;
void *f3key, *f3data;
int f3kl, f3dl;
cyl = (f3cchhr[0] << 8) | f3cchhr[1];
head = (f3cchhr[2] << 8) | f3cchhr[3];
rec = f3cchhr[4];
if (verbose)
fprintf(stderr, "getF3dscb reading F3 DSCB "
"cyl %d head %d rec %d\n", cyl, head, rec);
rc = read_block (cif, cyl, head, rec,
(void *)&f3key, &f3kl,
(void *)&f3data, &f3dl);
if (rc) {
fprintf(stderr,
"getF3dscb error reading F3 DSCB, rc %d\n", rc);
return 1;
}
if ((f3kl != 44) || (f3dl != 96)) {
fprintf(stderr, "getF3dscb bad key %d or data %d length\n",
f3kl, f3dl);
return 2;
}
memcpy((void *) &f3dscb->ds3keyid,
f3key, f3kl); // copy F3 key to buffer
memcpy((void *) ((BYTE*)f3dscb + f3kl),
f3data, f3dl); // copy F3 data to buffer
if (verbose > 1) {
fprintf(stderr, "getF3dscb F3 DSCB\n");
data_dump((void *) f3dscb, sizeof(FORMAT3_DSCB));
}
// Verify DS3FMTID byte = x'F3'
// Do this after copying data to caller's buffer so we can use struct fields
// rather than having to calculate offset to verified data; little harm done
// if it doesn't verify since we're toast if it's bad.
if (f3dscb->ds3fmtid != 0xf3) {
fprintf(stderr, "getF3dscb "
"F3 DSCB format id byte invalid (DS3IDFMT) %2.2X\n",
f3dscb->ds3fmtid);
return 2;
}
return 0;
} /* getF3dscb */
//----------------------------------------------------------------------------------
// dadsm_setup - retrieve volume label & DSCBs sufficient to describe dataset
//----------------------------------------------------------------------------------
//
// This routine reads the volume label rec, the VTOC F4 DSCB, the F1 DSCB
// for the dataset, and any F3 DSCB(s) associated with the dataset.
// Constructs extent array describing space allocated to the dataset.
//
// Input: