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dasdcat.c
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dasdcat.c
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/* DASDCAT.C (c) Copyright Roger Bowler, 1999-2012 */
/* DASD "cat" functions */
/*
* dasdcat
*
* Vast swathes copied from dasdpdsu.c (c) Copyright Roger Bowler, 1999-2009
* Changes and additions Copyright 2000-2009 by Malcolm Beattie
*/
#include "hstdinc.h"
#include "hercules.h"
#include "dasdblks.h"
#ifdef WIN32
#include <io.h> // (setmode)
#endif
/* Option flags */
#define OPT_ASCIIFY 0x1
#define OPT_CARDS 0x2
#define OPT_PDS_WILDCARD 0x4
#define OPT_PDS_LISTONLY 0x8
#define OPT_SEQNO 0x10
int end_of_track(BYTE *p)
{
return p[0] == 0xff && p[1] == 0xff && p[2] == 0xff && p[3] == 0xff
&& p[4] == 0xff && p[5] == 0xff && p[6] == 0xff && p[7] == 0xff;
}
int do_cat_cards(BYTE *buf, int len, unsigned long optflags)
{
if (len % 80 != 0) {
fprintf(stderr,
_("HHCDT002E Can't make 80 column card images from block length %d\n"), len);
return -1;
}
while (len) {
char card[81];
make_asciiz(card, sizeof(card), buf, (optflags & OPT_SEQNO) ? 80 : 72);
if (optflags & OPT_PDS_WILDCARD) {
putchar('|');
putchar(' ');
}
puts(card);
len -= 80;
buf += 80;
}
return 0;
}
int process_member(CIFBLK *cif, int noext, DSXTENT extent[],
BYTE *ttr, unsigned long optflags)
{
int rc, trk, len, cyl, head, rec;
BYTE *buf;
set_codepage(NULL);
trk = (ttr[0] << 8) | ttr[1];
rec = ttr[2];
while (1) {
rc = convert_tt(trk, noext, extent, cif->heads, &cyl, &head);
if (rc < 0)
return -1;
rc = read_block(cif, cyl, head, rec, 0, 0, &buf, &len);
if (rc < 0)
return -1;
if (rc > 0) {
trk++;
rec = 1;
continue;
}
if (len == 0)
break;
if (optflags & OPT_CARDS)
do_cat_cards(buf, len, optflags);
else if (optflags & OPT_ASCIIFY) {
BYTE *p;
for (p = buf; len--; p++)
putchar(guest_to_host(*p));
} else {
#if O_BINARY != 0
setmode(fileno(stdout),O_BINARY);
#endif
fwrite(buf, len, 1, stdout);
}
rec++;
}
return 0;
}
int process_dirblk(CIFBLK *cif, int noext, DSXTENT extent[], BYTE *dirblk,
char *pdsmember, unsigned long optflags)
{
int rc;
int dirrem;
char memname[9];
/* Load number of bytes in directory block */
dirrem = (dirblk[0] << 8) | dirblk[1];
if (dirrem < 2 || dirrem > 256) {
fprintf(stderr, _("HHCDT003E Directory block byte count is invalid\n"));
return -1;
}
if (!strcmp(pdsmember, "*"))
optflags |= OPT_PDS_WILDCARD;
else if (!strcmp(pdsmember, "?"))
optflags |= OPT_PDS_LISTONLY;
/* Point to first directory entry */
dirblk += 2;
dirrem -= 2;
while (dirrem > 0) {
PDSDIR *dirent = (PDSDIR*)dirblk;
int k, size;
if (end_of_track(dirent->pds2name))
return 1;
make_asciiz(memname, sizeof(memname), dirent->pds2name, 8);
if (optflags & OPT_PDS_LISTONLY) {
char memname_lc[9];
memcpy(memname_lc, memname, sizeof(memname));
string_to_lower(memname_lc);
puts(memname_lc);
}
else if ((optflags & OPT_PDS_WILDCARD) || !strcmp(pdsmember, memname)) {
if (optflags & OPT_PDS_WILDCARD)
printf("> Member %s\n", memname);
rc = process_member(cif, noext, extent, dirent->pds2ttrp, optflags);
if (rc < 0)
return -1;
}
/* Load the user data halfword count */
k = dirent->pds2indc & PDS2INDC_LUSR;
/* Point to next directory entry */
size = 12 + k*2;
dirblk += size;
dirrem -= size;
}
return 0;
}
int do_cat_pdsmember(CIFBLK *cif, DSXTENT *extent, int noext,
char *pdsmember, unsigned long optflags)
{
int rc, trk, rec;
/* Point to the start of the directory */
trk = 0;
rec = 1;
/* Read the directory */
while (1) {
BYTE *blkptr;
BYTE dirblk[256];
int cyl, head, len;
#ifdef EXTERNALGUI
if (extgui) fprintf(stderr,"CTRK=%d\n",trk);
#endif /*EXTERNALGUI*/
rc = convert_tt(trk, noext, extent, cif->heads, &cyl, &head);
if (rc < 0)
return -1;
rc = read_block(cif, cyl, head, rec, 0, 0, &blkptr, &len);
if (rc < 0)
return -1;
if (rc > 0) {
trk++;
rec = 1;
continue;
}
if (len == 0)
break;
memcpy(dirblk, blkptr, sizeof(dirblk));
rc = process_dirblk(cif, noext, extent, dirblk, pdsmember, optflags);
if (rc < 0)
return -1;
if (rc > 0)
break;
rec++;
}
return rc;
}
int do_cat_nonpds(CIFBLK *cif, DSXTENT *extent, int noext,
unsigned long optflags)
{
UNREFERENCED(cif);
UNREFERENCED(extent);
UNREFERENCED(noext);
UNREFERENCED(optflags);
fprintf(stderr, _("HHCDT004E non-PDS-members not yet supported\n"));
return -1;
}
int do_cat(CIFBLK *cif, char *file)
{
int rc;
DSXTENT extent[16];
int noext;
char buff[100]; /* must fit max length DSNAME/MEMBER..OPTS */
char dsname[45];
unsigned long optflags = 0;
char *p;
char *pdsmember = 0;
if (!cif)
return 1;
strncpy(buff, file, sizeof(buff));
buff[sizeof(buff)-1] = 0;
p = strchr(buff, ':');
if (p) {
*p++ = 0;
for (; *p; p++) {
if (*p == 'a')
optflags |= OPT_ASCIIFY;
else if (*p == 'c')
optflags |= OPT_CARDS;
else if (*p == 's')
optflags |= OPT_SEQNO;
else
fprintf(stderr, _("HHCDT005E unknown dataset name option: '%c'\n"), *p);
}
}
p = strchr(buff, '/');
if (p) {
*p = 0;
pdsmember = p + 1;
string_to_upper(pdsmember);
}
strncpy(dsname, buff, sizeof(dsname));
dsname[sizeof(dsname)-1] = 0;
string_to_upper(dsname);
rc = build_extent_array(cif, dsname, extent, &noext);
if (rc < 0)
return -1;
#ifdef EXTERNALGUI
/* Calculate ending relative track */
if (extgui) {
int bcyl; /* Extent begin cylinder */
int btrk; /* Extent begin head */
int ecyl; /* Extent end cylinder */
int etrk; /* Extent end head */
int trks; /* total tracks in dataset */
int i; /* loop control */
for (i = 0, trks = 0; i < noext; i++) {
bcyl = (extent[i].xtbcyl[0] << 8) | extent[i].xtbcyl[1];
btrk = (extent[i].xtbtrk[0] << 8) | extent[i].xtbtrk[1];
ecyl = (extent[i].xtecyl[0] << 8) | extent[i].xtecyl[1];
etrk = (extent[i].xtetrk[0] << 8) | extent[i].xtetrk[1];
trks += (((ecyl*cif->heads)+etrk)-((bcyl*cif->heads)+btrk))+1;
}
fprintf(stderr,"ETRK=%d\n",trks-1);
}
#endif /*EXTERNALGUI*/
if (pdsmember)
rc = do_cat_pdsmember(cif, extent, noext, pdsmember, optflags);
else
rc = do_cat_nonpds(cif, extent, noext, optflags);
return rc;
}
int main(int argc, char **argv)
{
int rc = 0;
CIFBLK *cif = 0;
char *fn, *sfn;
INITIALIZE_UTILITY("dasdcat");
/* Display program info message */
display_version (stderr, "Hercules DASD cat program ", FALSE);
if (argc < 2) {
fprintf(stderr, "Usage: dasdcat [-i dasd_image [sf=shadow-file-name] dsname...]...\n");
fprintf(stderr, " dsname can (currently must) be pdsname/spec\n");
fprintf(stderr, " spec is memname[:flags], * (all) or ? (list)\n");
fprintf(stderr, " flags can include (c)ard images, (a)scii\n");
exit(2);
}
/*
* If your version of Hercules doesn't have support in its
* dasdutil.c for turning off verbose messages, then remove
* the following line but you'll have to live with chatty
* progress output on stdout.
*/
set_verbose_util(0);
while (*++argv)
{
if (!strcmp(*argv, "-i"))
{
fn = *++argv;
if (*(argv+1) && strlen (*(argv+1)) > 3 && !memcmp(*(argv+1), "sf=", 3))
sfn = *++argv;
else sfn = NULL;
if (cif)
{
close_ckd_image(cif);
cif = 0;
}
cif = open_ckd_image(fn, sfn, O_RDONLY | O_BINARY, 0);
if (!cif)
fprintf(stderr, _("HHCDT001E failed to open image %s\n"), *argv);
}
else
{
if (do_cat(cif, *argv))
rc = 1;
}
}
if (cif)
close_ckd_image(cif);
return rc;
}