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tapesplt.c
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/* TAPESPLT.C (c) Copyright Jay Maynard, 2000-2012 */
/* Split AWSTAPE format tape image */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/*-------------------------------------------------------------------*/
/* This program reads an AWSTAPE format tape image file and produces */
/* output files containing pieces of it, controlled by command line */
/* options. */
/*-------------------------------------------------------------------*/
#include "hstdinc.h"
#include "hercules.h"
#include "tapedev.h"
#define UTILITY_NAME "tapesplt"
/*-------------------------------------------------------------------*/
/* Static data areas */
/*-------------------------------------------------------------------*/
static BYTE vollbl[] = "\xE5\xD6\xD3"; /* EBCDIC characters "VOL" */
static BYTE hdrlbl[] = "\xC8\xC4\xD9"; /* EBCDIC characters "HDR" */
static BYTE eoflbl[] = "\xC5\xD6\xC6"; /* EBCDIC characters "EOF" */
static BYTE eovlbl[] = "\xC5\xD6\xE5"; /* EBCDIC characters "EOV" */
static BYTE buf[ MAX_BLKLEN ];
#ifdef EXTERNALGUI
/* Report progress every this many bytes */
#define PROGRESS_MASK (~0x3FFFF /* 256K */)
/* How many bytes we've read so far. */
long curpos = 0;
long prevpos = 0;
#endif /*EXTERNALGUI*/
/*-------------------------------------------------------------------*/
/* tapesplt main entry point */
/*-------------------------------------------------------------------*/
int main (int argc, char *argv[])
{
char *pgm; /* less any extension (.ext) */
int rc; /* Return code */
int i; /* Array subscript */
int len; /* Block length */
char *infilename; /* -> Input file name */
char *outfilename; /* -> Current out file name */
int infd = -1; /* Input file descriptor */
int outfd = -1; /* Current out file desc */
int fileno; /* Tape file number */
int blkcount; /* Block count */
int curblkl; /* Current block length */
int minblksz; /* Minimum block size */
int maxblksz; /* Maximum block size */
int64_t file_bytes; /* File byte count */
int outfilenum; /* Current out file# in argv */
int outfilecount; /* Current # files copied */
int files2copy; /* Current # files to copy */
BYTE labelrec[81]; /* Standard label (ASCIIZ) */
AWSTAPE_BLKHDR awshdr; /* AWSTAPE block header */
char pathname[MAX_PATH]; /* file path in host format */
INITIALIZE_UTILITY( UTILITY_NAME, "split AWS tape into pieces", &pgm );
/* The only argument is the tape image file name */
if (argc > 3 && argv[1] != NULL)
{
infilename = argv[1];
}
else
{
// "Usage: %s ...
WRMSG( HHC02725, "I", pgm );
exit (1);
}
/* Open the tape device */
hostpath(pathname, infilename, sizeof(pathname));
infd = HOPEN (pathname, O_RDONLY | O_BINARY);
if (infd < 0)
{
// "Tape %s: Error opening: errno=%d: %s"
FWRMSG( stderr, HHC02715, "E", infilename, errno, strerror( errno ));
exit (2);
}
/* Copy blocks from input to output files */
fileno = 1;
blkcount = 0;
minblksz = 0;
maxblksz = 0;
file_bytes = 0;
len = 0;
for (outfilenum = 2; outfilenum < argc; outfilenum += 2)
{
outfilename = argv[outfilenum];
// "File %s: writing output file"
WRMSG( HHC02740, "I", outfilename );
hostpath(pathname, outfilename, sizeof(pathname));
outfd = HOPEN (pathname, O_WRONLY | O_CREAT | O_BINARY,
S_IRUSR | S_IWUSR | S_IRGRP);
if (outfd < 0)
{
// "Tape %s: Error opening: errno=%d: %s"
FWRMSG( stderr, HHC02715, "E", outfilename, errno, strerror( errno ));
exit (3);
}
if (outfilenum == argc)
{
/* count not specified for last file, so use big number */
files2copy = 32767;
}
else
{
files2copy = atoi(argv[outfilenum + 1]);
}
/* Copy just that many files */
for (outfilecount = 0; outfilecount < files2copy; )
{
/* Read a block from the tape */
len = read (infd, buf, sizeof(AWSTAPE_BLKHDR));
if (len < 0)
{
// "File %s: Error reading %s header: rc=%d, errno=%d: %s"
FWRMSG( stderr, HHC02707, "E", infilename, "AWSTAPE", len, errno, strerror( errno ));
exit (4);
}
/* Did we finish too soon? */
if ((len > 0) && (len < (int)sizeof(AWSTAPE_BLKHDR)))
{
// "File %s: Error, incomplete %s header"
FWRMSG( stderr, HHC02741, "E", infilename, "AWSTAPE" );
exit(5);
}
#ifdef EXTERNALGUI
if (extgui)
{
curpos += len;
/* Report progress every nnnK */
if( ( curpos & PROGRESS_MASK ) != ( prevpos & PROGRESS_MASK ) )
{
prevpos = curpos;
EXTGUIMSG( "IPOS=%ld\n", curpos );
}
}
#endif /*EXTERNALGUI*/
/* Check for end of tape. */
if (len == 0)
{
// "End of tape"
WRMSG( HHC02704, "I" );
break;
}
/* Copy the header to the output file. */
rc = write(outfd, buf, sizeof(AWSTAPE_BLKHDR));
if (rc < (int)sizeof(AWSTAPE_BLKHDR))
{
// "File %s: Error writing %s header: rc=%d, errno=%d: %s"
FWRMSG( stderr, HHC02711, "E", outfilename, "AWSTAPE", rc, errno, strerror( errno ));
exit(6);
}
/* Parse the block header */
memcpy(&awshdr, buf, sizeof(AWSTAPE_BLKHDR));
/* Tapemark? */
if ((awshdr.flags1 & AWSTAPE_FLAG1_TAPEMARK) != 0)
{
/* Print summary of current file */
if (blkcount)
// "File No. %u: Blocks=%u, Bytes=%"PRId64", Block size min=%u, max=%u, avg=%u"
WRMSG( HHC02721, "I", fileno, blkcount, file_bytes, minblksz, maxblksz, (int)file_bytes/blkcount );
/* Reset counters for next file */
fileno++;
minblksz = 0;
maxblksz = 0;
blkcount = 0;
file_bytes = 0;
/* Count the file we just copied. */
outfilecount++;
}
else /* if(tapemark) */
{
/* Count blocks and block sizes */
blkcount++;
curblkl = awshdr.curblkl[0] + (awshdr.curblkl[1] << 8);
if (curblkl > maxblksz) maxblksz = curblkl;
if (minblksz == 0 || curblkl < minblksz) minblksz = curblkl;
file_bytes += curblkl;
/* Read the data block. */
len = read (infd, buf, curblkl);
if (len < 0)
{
// "File %s: Error reading %s data block: rc=%d, errno=%d: %s"
FWRMSG( stderr, HHC02709, "E", infilename, "AWSTAPE", rc, errno, strerror( errno ));
exit (7);
}
/* Did we finish too soon? */
if ((len > 0) && (len < curblkl))
{
// "File %s: Error, incomplete final data block: expected %d bytes, read %d"
FWRMSG( stderr, HHC02742, "E", infilename, curblkl, len );
exit(8);
}
/* Check for end of tape */
if (len == 0)
{
// "File %s: Error, %s header block without data"
FWRMSG( stderr, HHC02743, "E", infilename, "AWSTAPE" );
exit(9);
}
#ifdef EXTERNALGUI
if (extgui)
{
curpos += len;
/* Report progress every nnnK */
if( ( curpos & PROGRESS_MASK ) != ( prevpos & PROGRESS_MASK ) )
{
prevpos = curpos;
EXTGUIMSG( "IPOS=%ld\n", curpos );
}
}
#endif /*EXTERNALGUI*/
/* Copy the header to the output file. */
rc = write(outfd, buf, len);
if (rc < len)
{
// "File %s: Error writing %s data block: rc=%d, errno=%d: %s"
FWRMSG( stderr, HHC02712, "E", outfilename, "AWSTAPE", rc, errno, strerror( errno ));
exit(10);
}
/* Print standard labels */
if (len == 80 && blkcount < 4
&& (memcmp(buf, vollbl, 3) == 0
|| memcmp(buf, hdrlbl, 3) == 0
|| memcmp(buf, eoflbl, 3) == 0
|| memcmp(buf, eovlbl, 3) == 0))
{
for (i=0; i < 80; i++)
labelrec[i] = guest_to_host(buf[i]);
labelrec[i] = '\0';
// "Tape Label: %s"
WRMSG( HHC02722, "I", labelrec );
}
} /* end if(tapemark) */
} /* end for(outfilecount) */
close(outfd);
} /* end for(outfilenum) */
/* Close files and exit */
close (infd);
return 0;
} /* end function main */