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dasdseq.c
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dasdseq.c
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/* 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: