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cckdswap.c
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cckdswap.c
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/* CCKDSWAP.C (c) Copyright Roger Bowler, 1999-2007 */
/* Swap the `endianess' of a compressed CKD file. */
// $Id$
/*-------------------------------------------------------------------*/
/* This module changes the `endianess' of a compressed CKD file. */
/*-------------------------------------------------------------------*/
// $Log$
// Revision 1.20 2006/12/08 09:43:17 jj
// Add CVS message log
//
#include "hstdinc.h"
#include "hercules.h"
/*-------------------------------------------------------------------*/
/* Swap the `endianess' of cckd file */
/*-------------------------------------------------------------------*/
int syntax ();
int main ( int argc, char *argv[])
{
CKDDASD_DEVHDR devhdr; /* CKD device header */
CCKDDASD_DEVHDR cdevhdr; /* Compressed CKD device hdr */
int level = 0; /* Chkdsk level */
int force = 0; /* 1=swap if OPENED bit on */
int rc; /* Return code */
int i; /* Index */
int bigend; /* 1=big-endian file */
DEVBLK devblk; /* DEVBLK */
DEVBLK *dev=&devblk; /* -> DEVBLK */
#if defined(ENABLE_NLS)
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, HERC_LOCALEDIR);
textdomain(PACKAGE);
#endif
#ifdef EXTERNALGUI
if (argc >= 1 && strncmp(argv[argc-1],"EXTERNALGUI",11) == 0)
{
extgui = 1;
argc--;
setvbuf(stderr, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
}
#endif /*EXTERNALGUI*/
/* parse the arguments */
for (argc--, argv++ ; argc > 0 ; argc--, argv++)
{
if(**argv != '-') break;
switch(argv[0][1])
{
case '0':
case '1':
case '2':
case '3': if (argv[0][2] != '\0') return syntax ();
level = (argv[0][1] & 0xf);
break;
case 'f': if (argv[0][2] != '\0') return syntax ();
force = 1;
break;
case 'v': if (argv[0][2] != '\0') return syntax ();
display_version
(stderr, "Hercules cckd swap program ", FALSE);
return 0;
default: return syntax ();
}
}
if (argc < 1) return syntax ();
for (i = 0; i < argc; i++)
{
memset (dev, 0, sizeof (DEVBLK));
dev->batch = 1;
/* open the input file */
hostpath(dev->filename, argv[i], sizeof(dev->filename));
dev->fd = open (dev->filename, O_RDWR|O_BINARY);
if (dev->fd < 0)
{
cckdumsg (dev, 700, "open error: %s\n", strerror(errno));
continue;
}
/* read the CKD device header */
if ((rc = read (dev->fd, &devhdr, CKDDASD_DEVHDR_SIZE)) < CKDDASD_DEVHDR_SIZE)
{
cckdumsg (dev, 703, "read error rc=%d offset 0x%" I64_FMT "x len %d: %s\n",
rc, (long long)0, CKDDASD_DEVHDR_SIZE,
rc < 0 ? strerror(errno) : "incomplete");
close (dev->fd);
continue;
}
if (memcmp(devhdr.devid, "CKD_C370", 8) != 0
&& memcmp(devhdr.devid, "CKD_S370", 8) != 0
&& memcmp(devhdr.devid, "FBA_C370", 8) != 0
&& memcmp(devhdr.devid, "FBA_S370", 8) != 0)
{
cckdumsg (dev, 999, "not a compressed dasd file\n");
close (dev->fd);
continue;
}
/* read the compressed CKD device header */
if ((rc = read (dev->fd, &cdevhdr, CCKD_DEVHDR_SIZE)) < CCKD_DEVHDR_SIZE)
{
cckdumsg (dev, 703, "read error rc=%d offset 0x%" I64_FMT "x len %d: %s\n",
rc, (long long)CCKD_DEVHDR_POS, CCKD_DEVHDR_SIZE,
rc < 0 ? strerror(errno) : "incomplete");
close (dev->fd);
continue;
}
/* Check the OPENED bit */
if (!force && (cdevhdr.options & CCKD_OPENED))
{
cckdumsg (dev, 707, "OPENED bit is on, use -f\n");
close (dev->fd);
continue;
}
/* get the byte order of the file */
bigend = (cdevhdr.options & CCKD_BIGENDIAN);
/* call chkdsk */
if (cckd_chkdsk (dev, level) < 0)
{
cckdumsg (dev, 708, "chkdsk errors\n");
close (dev->fd);
continue;
}
/* re-read the compressed CKD device header */
if (lseek (dev->fd, CCKD_DEVHDR_POS, SEEK_SET) < 0)
{
cckdumsg (dev, 702, "lseek error offset 0x%" I64_FMT "x: %s\n",
(long long)CCKD_DEVHDR_POS, strerror(errno));
close (dev->fd);
continue;
}
if ((rc = read (dev->fd, &cdevhdr, CCKD_DEVHDR_SIZE)) < CCKD_DEVHDR_SIZE)
{
cckdumsg (dev, 703, "read error rc=%d offset 0x%" I64_FMT "x len %d: %s\n",
rc, (long long)CCKD_DEVHDR_POS, CCKD_DEVHDR_SIZE,
rc < 0 ? strerror(errno) : "incomplete");
close (dev->fd);
continue;
}
/* swap the byte order of the file if chkdsk didn't do it for us */
if (bigend == (cdevhdr.options & CCKD_BIGENDIAN))
{
cckdumsg (dev, 101, "converting to %s\n",
bigend ? "litle-endian" : "big-endian");
if (cckd_swapend (dev) < 0)
cckdumsg (dev, 910, "error during swap\n");
}
close (dev->fd);
} /* for each arg */
return 0;
} /* end main */
int syntax ()
{
fprintf (stderr, "\ncckdswap [-v] [-f] file1 [file2 ... ]\n"
"\n"
" -v display version and exit\n"
"\n"
" -f force check even if OPENED bit is on\n"
"\n"
" chkdsk level is a digit 0 - 3:\n"
" -0 -- minimal checking\n"
" -1 -- normal checking\n"
" -2 -- intermediate checking\n"
" -3 -- maximal checking\n"
" default 0\n"
"\n");
return -1;
} /* end function syntax */