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hetget.c
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hetget.c
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/* HETGET.C (c) Copyright Leland Lucius, 2000-2012 */
/* (c) Copyright TurboHercules, SAS 2010-2011 */
/* Extract files from an HET file */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/*
|| ----------------------------------------------------------------------------
||
|| HETGET.C (c) Copyright Leland Lucius, 2000-2009
|| Released under terms of the Q Public License.
||
|| Extract files from a AWS, HET or FAKETAPE file
||
|| ----------------------------------------------------------------------------
*/
#include "hstdinc.h"
#include "hercules.h"
#include "hetlib.h"
#include "ftlib.h"
#include "sllib.h"
#include "herc_getopt.h"
#define UTILITY_NAME "hetget"
/*
|| Local volatile data
*/
#define O_NL 0x80
#define O_ASCII 0x40
#define O_STRIP 0x20
#define O_UNBLOCK 0x10
struct
{
char *ifile;
char *ofile;
HETB *hetb;
FETB *fetb;
int faketape;
int fileno;
int lrecl;
int blksize;
unsigned char flags;
unsigned char recfm;
}
opts =
{
NULL,
NULL,
NULL,
NULL,
FALSE,
0,
0,
0,
0,
0,
};
/*
|| Valid record formats
*/
#define O_UNDEFINED 0x80
#define O_FIXED 0x40
#define O_VARIABLE 0x20
#define O_BLOCKED 0x08
#define O_SPANNED 0x04
static const struct
{
char *recfm;
int fmt;
}
valfm[] =
{
{ "U", O_UNDEFINED | 0 | 0 },
{ "UA", O_UNDEFINED | 0 | 0 },
{ "UM", O_UNDEFINED | 0 | 0 },
{ "F", O_FIXED | 0 | 0 },
{ "FA", O_FIXED | 0 | 0 },
{ "FM", O_FIXED | 0 | 0 },
{ "FB", O_FIXED | O_BLOCKED | 0 },
{ "FBA", O_FIXED | O_BLOCKED | 0 },
{ "FBM", O_FIXED | O_BLOCKED | 0 },
{ "FS", O_FIXED | O_BLOCKED | 0 },
{ "FSA", O_FIXED | O_BLOCKED | 0 },
{ "FSM", O_FIXED | O_BLOCKED | 0 },
{ "FBS", O_FIXED | O_BLOCKED | 0 },
{ "FBSA", O_FIXED | O_BLOCKED | 0 },
{ "FBSM", O_FIXED | O_BLOCKED | 0 },
{ "V", O_VARIABLE | 0 | 0 },
{ "VA", O_VARIABLE | 0 | 0 },
{ "VM", O_VARIABLE | 0 | 0 },
{ "VB", O_VARIABLE | O_BLOCKED | 0 },
{ "VBA", O_VARIABLE | O_BLOCKED | 0 },
{ "VBM", O_VARIABLE | O_BLOCKED | 0 },
{ "VS", O_VARIABLE | 0 | O_SPANNED },
{ "VSA", O_VARIABLE | 0 | O_SPANNED },
{ "VSM", O_VARIABLE | 0 | O_SPANNED },
{ "VBS", O_VARIABLE | O_BLOCKED | O_SPANNED },
{ "VBSA", O_VARIABLE | O_BLOCKED | O_SPANNED },
{ "VBSM", O_VARIABLE | O_BLOCKED | O_SPANNED },
};
#define VALFMCNT ( sizeof( valfm ) / sizeof( valfm[ 0 ] ) )
/*
|| Block and record management
*/
unsigned char *blkptr = NULL;
int blkidx = 0;
int blklen = 0;
unsigned char *recptr = NULL;
int recidx = 0;
int reclen = 0;
#ifdef EXTERNALGUI
/*
|| Previously reported file position
*/
static off_t prevpos = 0;
/*
|| Report progress every this many bytes
*/
#define PROGRESS_MASK (~0x3FFFF /* 256K */)
#endif /*EXTERNALGUI*/
/*
|| Merge DCB information from HDR2 label
*/
void
merge( SLLABEL *lab )
{
SLFMT fmt;
int i;
/*
|| Make the label more managable
*/
sl_fmtlab( &fmt, lab );
/*
|| Merge the record format;
*/
if( opts.recfm == 0 )
{
opts.recfm = O_UNDEFINED;
for( i = 0 ; i < (int)VALFMCNT ; i++ )
{
if( strcasecmp( fmt.slds2.recfm, valfm[ i ].recfm ) == 0 )
{
opts.recfm = valfm[ i ].fmt;
break;
}
}
}
/*
|| Merge in the record length
*/
if( opts.lrecl == 0 )
{
opts.lrecl = atoi( fmt.slds2.lrecl );
}
/*
|| Merge in the block size
*/
if( opts.blksize == 0 )
{
/*
|| Try the blksize field first
*/
opts.blksize = atoi( fmt.slds2.blksize );
if( opts.blksize == 0 )
{
/*
|| Still zero, so try the lblkln field
*/
opts.blksize = atoi( fmt.slds2.lblkln );
}
}
/*
|| Locate final RECFM string
*/
for( i = 0 ; i < (int)VALFMCNT ; i++ )
{
if( strcasecmp( fmt.slds2.recfm, valfm[ i ].recfm ) == 0 )
{
break;
}
}
/*
|| Print DCB attributes
*/
// "DCB Attributes used: RECFM=%-4.4s LRECL=%-5.5d BLKSIZE=%d"
WRMSG( HHC02761, "I", valfm[ i ].recfm, opts.lrecl, opts.blksize );
return;
}
/*
|| Return block length from BDW
*/
int
bdw_length( const unsigned char *ptr )
{
unsigned int len;
/*
|| Extended format BDW?
*/
if( ptr[ 0 ] & 0x80 )
{
/*
|| Length is 31 bits
*/
len = ptr[ 0 ] << 24;
len += ptr[ 1 ] << 16;
len += ptr[ 2 ] << 8;
len += ptr[ 3 ];
len &= 0x7fffffff;
}
else
{
/*
|| Length is 15 bits
*/
len = ptr[ 0 ] << 8;
len += ptr[ 1 ];
}
return( len );
}
/*
|| Return record length from RDW
*/
int
rdw_length( const unsigned char *ptr )
{
unsigned int len;
/*
|| Get the record length
*/
len = ptr[ 0 ] << 8;
len += ptr[ 1 ];
return( len );
}
/*
|| Retrieves a block from the tape file and resets variables
*/
int
getblock( )
{
int rc;
/*
|| Read a block from the tape
*/
if ( opts.faketape )
rc = fet_read( opts.fetb, blkptr );
else
rc = het_read( opts.hetb, blkptr );
if( rc < 0 )
{
return( rc );
}
/*
|| Save the block length (should we use BDW for RECFM=V files???)
*/
blklen = rc;
return( rc );
}
/*
|| Retrieve logical records from the tape - doesn't handle SPANNED records
*/
int
getrecord( )
{
int rc;
/*
|| Won't be null if we've been here before
*/
if( recptr != NULL )
{
recidx += reclen;
}
/*
|| Need a new block first time through or we've exhausted current block
*/
if( ( recptr == NULL ) || ( recidx >= blklen ) )
{
/*
|| Go get another block
*/
rc = getblock( );
if( rc < 0 )
{
return( rc );
}
/*
|| For RECFM=V, bump index past BDW
*/
recidx = 0;
if( opts.recfm & O_VARIABLE )
{
/* protect against a corrupt (short) block */
if ( rc < 8 )
{
return ( -1 );
}
recidx = 4;
}
}
/*
|| Set the new record pointer
*/
recptr = &blkptr[ recidx ];
/*
|| Set the record length depending on record type
*/
if( opts.recfm & O_FIXED )
{
reclen = opts.lrecl;
}
else if( opts.recfm & O_VARIABLE )
{
reclen = rdw_length( recptr );
/* protect against corrupt (short) block */
if ( reclen + recidx > blklen )
{
return (-1);
}
/* protect against a corrupt (less than 4) RDW */
if ( reclen < 4 )
{
return (-1);
}
}
else
{
reclen = blklen;
}
return( reclen );
}
/*
|| Retrieve and validate a standard label
*/
int
get_sl( SLLABEL *lab )
{
int rc;
/*
|| Read a block
*/
if ( opts.faketape )
rc = fet_read( opts.fetb, blkptr );
else
rc = het_read( opts.hetb, blkptr );
if( rc >= 0 )
{
/*
|| Does is look like a standard label?
*/
if( sl_islabel( lab, blkptr, rc ) == TRUE )
{
return( 0 );
}
}
else
{
// "Error in function %s: %s"
if ( opts.faketape )
FWRMSG( stderr, HHC00075, "E", "fet_read()", fet_error( rc ) );
else
FWRMSG( stderr, HHC00075, "E", "het_read()", het_error( rc ) );
}
return( -1 );
}
/*
|| Extract the file from the tape
*/
int
getfile( FILE *outf )
{
SLFMT fmt;
SLLABEL lab;
unsigned char *ptr;
int fileno;
int rc;
/*
|| Skip to the desired file
*/
if( opts.flags & O_NL )
{
/*
|| For NL tapes, just use the specified file number
*/
fileno = opts.fileno;
/*
|| Start skipping
*/
while( --fileno )
{
/*
|| Forward space to beginning of next file
*/
if ( opts.faketape )
rc = fet_fsf ( opts.fetb );
else
rc = het_fsf( opts.hetb );
if( rc < 0 )
{
char msgbuf[128];
MSGBUF( msgbuf, "%set_fsf() while positioning to file '%d'",
opts.faketape ? "f" : "h",
opts.fileno );
// "Error in function %s: %s"
FWRMSG( stderr, HHC00075, "E", msgbuf, het_error( rc ) );
return( rc );
}
}
}
else
{
/*
|| First block should be a VOL1 record
*/
rc = get_sl( &lab );
if( rc < 0 || !sl_isvol( &lab, 1 ) )
{
// "%s label missing"
FWRMSG( stderr, HHC02753, "E", "VOL1" );
return( -1 );
}
/*
|| For SL, adjust the file # so we end up on the label before the data
*/
fileno = ( opts.fileno * 3 ) - 2;
/*
|| Start skipping
*/
while( --fileno )
{
/*
|| Forward space to beginning of next file
*/
if ( opts.faketape )
rc = fet_fsf ( opts.fetb );
else
rc = het_fsf( opts.hetb );
if( rc < 0 )
{
char msgbuf[128];
MSGBUF( msgbuf, "%set_fsf() while positioning to file '%d'",
opts.faketape ? "f" : "h",
opts.fileno );
// "Error in function %s: %s"
FWRMSG( stderr, HHC00075, "E", msgbuf, het_error( rc ) );
return( rc );
}
}
/*
|| Get the HDR1 label.
*/
rc = get_sl( &lab );
if( rc < 0 || !sl_ishdr( &lab, 1 ) )
{
// "%s label missing"
FWRMSG( stderr, HHC02753, "E", "HDR1" );
return( -1 );
}
/*
|| Make the label more managable
*/
sl_fmtlab( &fmt, &lab );
// "File Info: DSN=%-17.17s"
WRMSG( HHC02754, "I", fmt.slds1.dsid );
/*
|| Get the HDR2 label.
*/
rc = get_sl( &lab );
if( rc < 0 || !sl_ishdr( &lab, 2 ) )
{
// "%s label missing"
FWRMSG( stderr, HHC02753, "E", "HDR2" );
return( -1 );
}
/*
|| Merge the DCB information
*/
merge( &lab );
/*
|| Hop over the tapemark
*/
if ( opts.faketape )
rc = fet_fsf( opts.fetb );
else
rc = het_fsf( opts.hetb );
if( rc < 0 )
{
// "Error in function %s: %s"
if ( opts.faketape )
FWRMSG( stderr, HHC00075, "E", "fet_fsf()", fet_error( rc ) );
else
FWRMSG( stderr, HHC00075, "E", "het_fsf()", het_error( rc ) );
return( rc );
}
}
/*
|| Different processing when converting to ASCII
*/
if( opts.flags & ( O_ASCII | O_UNBLOCK ) )
{
/*
|| Get a record
*/
while( ( rc = getrecord( ) ) >= 0 )
{
#ifdef EXTERNALGUI
if( extgui )
{
off_t curpos;
/* Report progress every nnnK */
if ( opts.faketape )
curpos = ftell( opts.fetb->fh );
else
curpos = ftell( opts.hetb->fh );
if( ( curpos & PROGRESS_MASK ) != ( prevpos & PROGRESS_MASK ) )
{
prevpos = curpos;
EXTGUIMSG( "IPOS=%"PRId64"\n", (U64)curpos );
}
}
#endif /*EXTERNALGUI*/
/*
|| Get working copy of record ptr
*/
ptr = recptr;
/*
|| Only want data portion for RECFM=V records
*/
if( opts.recfm & O_VARIABLE )
{
ptr += 4;
rc -= 4;
}
/*
|| Convert record to ASCII
*/
if( opts.flags & O_ASCII )
{
sl_etoa( NULL, ptr, rc );
}
/*
|| Strip trailing blanks
*/
if( opts.flags & O_STRIP )
{
while( rc > 0 && ptr[ rc - 1 ] == ' ' )
{
rc--;
}
}
/*
|| Write the record out
*/
fwrite( ptr, rc, 1, outf );
/*
|| Put out a linefeed when converting
*/
if( opts.flags & O_ASCII )
{
fwrite( "\n", 1, 1, outf );
}
}
}
else
{
/*
|| Get a record
*/
while( ( rc = getblock( ) ) >= 0 )
{
#ifdef EXTERNALGUI
if( extgui )
{
off_t curpos;
/* Report progress every nnnK */
if ( opts.faketape )
curpos = ftell( opts.fetb->fh );
else
curpos = ftell( opts.hetb->fh );
if( ( curpos & PROGRESS_MASK ) != ( prevpos & PROGRESS_MASK ) )
{
prevpos = curpos;
EXTGUIMSG( "IPOS=%"PRId64"\n", (U64)curpos );
}
}
#endif /*EXTERNALGUI*/
/*
|| Write the record out
*/
fwrite( blkptr, blklen, 1, outf );
}
}
return( rc );
}
/*
|| Prints usage information
*/
void
usage( char *pgm )
{
// "Usage: %s ...
WRMSG( HHC02728, "I", pgm );
}
/*
|| Standard main
*/
int
main( int argc, char *argv[] )
{
char *pgm; /* less any extension (.ext) */
FILE *outf;
int rc;
int i;
char pathname[MAX_PATH];
INITIALIZE_UTILITY( UTILITY_NAME, "Extract Files from AWS, HET or FAKETAPE", &pgm );
/*
|| Process option switches
*/
while( TRUE )
{
rc = getopt( argc, argv, "abhnsu" );
if( rc == -1 )
{
break;
}
switch( rc )
{
case 'a':
opts.flags |= O_ASCII;
set_codepage(NULL);
break;
case 'h':
usage( pgm );
exit( 1 );
UNREACHABLE_CODE();
case 'n':
opts.flags |= O_NL;
break;
case 's':
opts.flags |= O_STRIP;
break;
case 'u':
opts.flags |= O_UNBLOCK;
break;
default:
usage( pgm );
exit( 1 );
UNREACHABLE_CODE();
}
}
/*
|| Calc number of non-switch arguments
*/
argc -= optind;
/*
|| We must have at least the first 3 parms
*/
if(argc < 3)
{
if ( argc > 1 )
// "Invalid number of arguments"
FWRMSG( stderr, HHC02446, "E" );
usage( pgm );
exit( 1 );
}
hostpath( pathname, argv[ optind ], sizeof(pathname) );
opts.ifile = strdup( pathname );
if ( ( rc = (int)strlen( opts.ifile ) ) > 4
&& ( rc = strcasecmp( &opts.ifile[rc-4], ".fkt" ) ) == 0 )
{
opts.faketape = TRUE;
}
hostpath( pathname, argv[ optind + 1 ], sizeof(pathname) );
opts.ofile = strdup( pathname );
opts.fileno = atoi( argv[ optind + 2 ] );
if( opts.fileno == 0 || opts.fileno > 9999 )
{
char msgbuf[20];
MSGBUF( msgbuf, "%d", opts.fileno );
// "Invalid argument %s%s"
FWRMSG( stderr, HHC02205, "S", msgbuf, "; file number must be within the range of 1 to 9999" );
exit( 1 );
}
/*
|| If NL tape, then we require the DCB attributes
*/
if( opts.flags & O_NL )
{
if( argc != 6 )
{
// "DCB attributes required for NL tape"
FWRMSG( stderr, HHC02750, "S" );
exit( 1 );
}
}
/*
|| If specified, get the DCB attributes
*/
if( argc > 3 )
{
/*
|| Must have only three
*/
if( argc != 6 )
{
usage( pgm );
exit( 1 );
}
/*
|| Lookup the specified RECFM in our table
*/
opts.recfm = 0;
for( i = 0 ; i < (int)VALFMCNT ; i++ )
{
if( strcasecmp( argv[ optind + 3 ], valfm[ i ].recfm ) == 0 )
{
opts.recfm = valfm[ i ].fmt;
break;
}
}
/*
|| If we didn't find a match, show the user what the valid ones are
*/
if( opts.recfm == 0)
{
char msgbuf[512] = "";
char msgbuf2[64] = "";
char msgbuf3[16] = "";
char msgbuf4[128] = "";
/*
|| Dump out the valid RECFMs
*/
// "Valid record formats are:"
MSGBUF( msgbuf, MSG( HHC02751, "I" ) );
for( i = 0 ; i < (int)VALFMCNT ; i++ )
{
MSGBUF( msgbuf3, " %-4.4s", valfm[ i ].recfm );
if( ( ( i + 1 ) % 3 ) == 0 )
{
strlcat( msgbuf2, msgbuf3, sizeof(msgbuf2) );
// "%s"
MSGBUF( msgbuf4, MSG( HHC02752, "I", msgbuf2 ) );
strlcat( msgbuf, msgbuf4, sizeof(msgbuf) );
msgbuf2[0] = 0;
}
else
{
strlcat( msgbuf2, msgbuf3, sizeof(msgbuf2) );
}
}
printf( "%s", msgbuf );
exit( 1 );
}
/*
|| Get the record length
*/
opts.lrecl = atoi( argv[ optind + 4 ] );
/*
|| Get and validate the blksize
*/
opts.blksize = atoi( argv[ optind + 5 ] );
if( opts.blksize == 0 )
{
// "Invalid argument %s%s"
FWRMSG( stderr, HHC02205, "S", "0", "; block size can't be zero" );
exit( 1 );
}
}
/*
|| Open the tape file
*/
if ( opts.faketape )
rc = fet_open( &opts.fetb, opts.ifile, FETOPEN_READONLY );
else
rc = het_open( &opts.hetb, opts.ifile, HETOPEN_READONLY );
if( rc >= 0 )
{
/*
|| Get memory for the tape buffer
*/
blkptr = malloc( HETMAX_BLOCKSIZE );
if( blkptr != NULL )
{
/*
|| Open the output file
*/
outf = fopen( opts.ofile, "wb" );
if( outf != NULL )
{
/*
|| Go extract the file from the tape
*/
rc = getfile( outf );
/*
|| Close the output file
*/
fclose( outf );
}
/*
|| Free the buffer memory
*/
free( blkptr );
}
}
else
{
// "Error in function %s: %s"
if ( opts.faketape )
FWRMSG( stderr, HHC00075, "E", "fet_open()", fet_error( rc ) );
else
FWRMSG( stderr, HHC00075, "E", "het_open()", het_error( rc ) );
}
/*
|| Close the tape file
*/
if ( opts.faketape )
fet_close( &opts.fetb );
else
het_close( &opts.hetb );
return 0;
}