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cckdswap.c
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cckdswap.c
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/* CCKDSWAP.C (C) Copyright Roger Bowler, 1999-2012 */
/* Swap the 'endianness' of a CCKD file. */
/* */
/* Released under "The Q Public License Version 1" */
/* (http:https://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/*-------------------------------------------------------------------*/
/* This module changes the `endianness' of a compressed CKD file. */
/*-------------------------------------------------------------------*/
#include "hstdinc.h"
#include "hercules.h"
#include "dasdblks.h"
#include "ccwarn.h"
#define UTILITY_NAME "cckdswap"
#define UTILITY_DESC "Swap 'endianness' of a CCKD file"
/*-------------------------------------------------------------------*/
/* Swap the `endianness' of cckd file */
/*-------------------------------------------------------------------*/
int syntax( const char* pgm );
int main ( int argc, char *argv[])
{
char *pgm; /* less any extension (.ext) */
CKD_DEVHDR devhdr; /* CKD device header */
CCKD_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 */
INITIALIZE_UTILITY( UTILITY_NAME, UTILITY_DESC, &pgm );
/* 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':
case '4': if (argv[0][2] != '\0') return syntax( pgm );
level = (argv[0][1] & 0xf);
break;
case 'f': if (argv[0][2] != '\0') return syntax( pgm );
force = 1;
break;
default: return syntax( pgm );
}
}
if (argc < 1) return syntax( pgm );
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 ));
if ((dev->fd = HOPEN( dev->filename, O_RDWR | O_BINARY )) < 0)
{
// "%1d:%04X CCKD file %s: error in function %s: %s"
FWRMSG( stderr, HHC00354, "E", LCSS_DEVNUM,
dev->filename, "open()", strerror( errno ));
continue;
}
/* read the CKD device header */
if ((rc = read( dev->fd, &devhdr, CKD_DEVHDR_SIZE )) < CKD_DEVHDR_SIZE)
{
// "%1d:%04X CCKD file %s: error in function %s at offset 0x%16.16"PRIX64": %s"
FWRMSG( stderr, HHC00355, "E", LCSS_DEVNUM,
dev->filename, "read()", (U64) 0, rc < 0 ? strerror( errno ) : "incomplete" );
close( dev->fd );
continue;
}
if (!is_dh_devid_typ( devhdr.dh_devid, ANY32_CMP_OR_SF_TYP ))
{
// "%1d:%04X CCKD file %s: not a compressed dasd file"
FWRMSG( stderr, HHC00356, "E", LCSS_DEVNUM, dev->filename );
close( dev->fd );
continue;
}
dev->cckd64 = 0;
/* read the compressed CKD device header */
if ((rc = read (dev->fd, &cdevhdr, CCKD_DEVHDR_SIZE)) < CCKD_DEVHDR_SIZE)
{
FWRMSG( stderr, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"read()", (U64)CCKD_DEVHDR_POS, rc < 0 ? strerror( errno ) : "incomplete" );
close (dev->fd);
continue;
}
/* Check the OPENED bit */
if (!force && (cdevhdr.cdh_opts & CCKD_OPT_OPENED))
{
// "%1d:%04X CCKD file %s: opened bit is on, use -f"
FWRMSG( stderr, HHC00352, "E", LCSS_DEVNUM, dev->filename );
close (dev->fd);
continue;
}
/* get the byte order of the file */
bigend = (cdevhdr.cdh_opts & CCKD_OPT_BIGEND);
/* call chkdsk */
if (cckd_chkdsk (dev, level) < 0)
{
// "%1d:%04X CCKD file %s: check disk errors"
FWRMSG( stderr, HHC00353, "E", LCSS_DEVNUM, dev->filename );
close (dev->fd);
continue;
}
/* re-read the compressed CKD device header */
if (lseek (dev->fd, CCKD_DEVHDR_POS, SEEK_SET) < 0)
{
// "%1d:%04X CCKD file %s: error in function %s at offset 0x%16.16"PRIX64": %s"
FWRMSG( stderr, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"lseek()", (U64)CCKD_DEVHDR_POS, strerror( errno ));
close (dev->fd);
continue;
}
if ((rc = read (dev->fd, &cdevhdr, CCKD_DEVHDR_SIZE)) < CCKD_DEVHDR_SIZE)
{
// "%1d:%04X CCKD file %s: error in function %s at offset 0x%16.16"PRIX64": %s"
FWRMSG( stderr, HHC00355, "E", LCSS_DEVNUM, dev->filename,
"read()", (U64)CCKD_DEVHDR_POS, 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.cdh_opts & CCKD_OPT_BIGEND))
{
// "%1d:%04X CCKD file %s: converting to %s"
WRMSG( HHC00357, "I", LCSS_DEVNUM, dev->filename,
(cdevhdr.cdh_opts & CCKD_OPT_BIGEND) ?
"little-endian" : "big-endian" );
if (cckd_swapend (dev) < 0)
// "%1d:%04X CCKD file %s: error during swap"
FWRMSG( stderr, HHC00378, "E", LCSS_DEVNUM, dev->filename );
}
close (dev->fd);
} /* for each arg */
return 0;
} /* end main */
int syntax( const char* pgm )
{
WRMSG( HHC02495, "I", pgm );
return -1;
} /* end function syntax */