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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 `endianess' of a compressed CKD file. */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/*-------------------------------------------------------------------*/
/* This module changes the `endianess' of a compressed CKD file. */
/*-------------------------------------------------------------------*/
#include "hstdinc.h"
#include "hercules.h"
#define UTILITY_NAME "cckdswap"
/*-------------------------------------------------------------------*/
/* Swap the `endianess' of cckd file */
/*-------------------------------------------------------------------*/
int syntax (char *pgm);
int main ( int argc, char *argv[])
{
char *pgmname; /* prog name in host format */
char *pgm; /* less any extension (.ext) */
char msgbuf[512]; /* message build work area */
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 */
char *strtok_str = NULL;
/* Set program name */
if ( argc > 0 )
{
if ( strlen(argv[0]) == 0 )
{
pgmname = strdup( UTILITY_NAME );
}
else
{
char path[MAX_PATH];
#if defined( _MSVC_ )
GetModuleFileName( NULL, path, MAX_PATH );
#else
strncpy( path, argv[0], sizeof( path ) );
#endif
pgmname = strdup(basename(path));
#if !defined( _MSVC_ )
strncpy( path, argv[0], sizeof(path) );
#endif
}
}
else
{
pgmname = strdup( UTILITY_NAME );
}
pgm = strtok_r( strdup(pgmname), ".", &strtok_str);
INITIALIZE_UTILITY( pgmname );
/* Display the program identification message */
MSGBUF( msgbuf, MSG_C( HHC02499, "I", pgm, "Swap 'endianess' of a cckd file" ) );
display_version (stderr, msgbuf+10, FALSE);
/* 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 (pgm);
level = (argv[0][1] & 0xf);
break;
case 'f': if (argv[0][2] != '\0') return syntax (pgm);
force = 1;
break;
case 'v': if (argv[0][2] != '\0') return syntax (pgm);
return 0;
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));
dev->fd = HOPEN (dev->filename, O_RDWR|O_BINARY);
if (dev->fd < 0)
{
fprintf(stdout, MSG(HHC00354, "E", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename,
"open()", strerror(errno)));
continue;
}
/* read the CKD device header */
if ((rc = read (dev->fd, &devhdr, CKDDASD_DEVHDR_SIZE)) < CKDDASD_DEVHDR_SIZE)
{
fprintf(stdout, MSG(HHC00355, "E", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename,
"read()", (U64)0, 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)
{
fprintf(stdout, MSG(HHC00356, "E", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename));
close (dev->fd);
continue;
}
/* read the compressed CKD device header */
if ((rc = read (dev->fd, &cdevhdr, CCKD_DEVHDR_SIZE)) < CCKD_DEVHDR_SIZE)
{
fprintf(stdout, MSG(HHC00355, "E", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename,
"read()", (U64)CCKD_DEVHDR_POS, rc < 0 ? strerror(errno) : "incomplete"));
close (dev->fd);
continue;
}
/* Check the OPENED bit */
if (!force && (cdevhdr.options & CCKD_OPENED))
{
fprintf(stdout, MSG(HHC00352, "E", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename));
close (dev->fd);
continue;
}
/* get the byte order of the file */
bigend = (cdevhdr.options & CCKD_BIGENDIAN);
/* call chkdsk */
if (cckd_chkdsk (dev, level) < 0)
{
fprintf(stdout, MSG(HHC00353, "E", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename));
close (dev->fd);
continue;
}
/* re-read the compressed CKD device header */
if (lseek (dev->fd, CCKD_DEVHDR_POS, SEEK_SET) < 0)
{
fprintf(stdout, MSG(HHC00355, "E", SSID_TO_LCSS(dev->ssid), dev->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)
{
fprintf(stdout, MSG(HHC00355, "E", SSID_TO_LCSS(dev->ssid), dev->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.options & CCKD_BIGENDIAN))
{
fprintf(stdout, MSG(HHC00357, "I", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename,
cckd_endian() ? "big-endian" : "little-endian"));
if (cckd_swapend (dev) < 0)
fprintf(stdout, MSG(HHC00378, "E", SSID_TO_LCSS(dev->ssid), dev->devnum, dev->filename));
}
close (dev->fd);
} /* for each arg */
return 0;
} /* end main */
int syntax (char *pgm)
{
fprintf (stderr, MSG( HHC02495, "I", pgm ) );
return -1;
} /* end function syntax */