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dasdisup.c
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dasdisup.c
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/* DASDISUP.C (c) Copyright Roger Bowler, 1999-2011 */
/* Hercules DASD Utilities: IEHIOSUP */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
// $Id$
/*-------------------------------------------------------------------*/
/* This program performs the IEHIOSUP function of OS/360. */
/* It adjusts the TTRs in the XCTL tables in each of the */
/* Open/Close/EOV modules in SYS1.SVCLIB. */
/* */
/* The command format is: */
/* dasdisup ckdfile */
/* where: ckdfile is the name of the CKD image file */
/*-------------------------------------------------------------------*/
#include "hstdinc.h"
#include "hercules.h"
#include "dasdblks.h"
#define UTILITY_NAME "dasdisup"
/*-------------------------------------------------------------------*/
/* Internal macro definitions */
/*-------------------------------------------------------------------*/
#define HEX00 ((BYTE)'\x00') /* EBCDIC low value */
#define HEX40 ((BYTE)'\x40') /* EBCDIC space */
#define HEXFF ((BYTE)'\xFF') /* EBCDIC high value */
#define OVERPUNCH_ZERO ((BYTE)'\xC0') /* EBCDIC 12-0 card punch */
/*-------------------------------------------------------------------*/
/* Definition of member information array entry */
/*-------------------------------------------------------------------*/
typedef struct _MEMINFO {
BYTE memname[8]; /* Member name (EBCDIC) */
BYTE ttrtext[3]; /* TTR of first text record */
BYTE dwdsize; /* Text size in doublewords */
BYTE alias; /* 1=This is an alias */
BYTE notable; /* 1=Member has no XCTL table*/
BYTE multitxt; /* 1=Member has >1 text rcd */
} MEMINFO;
#define MAX_MEMBERS 1000 /* Size of member info array */
/*-------------------------------------------------------------------*/
/* Static data areas */
/*-------------------------------------------------------------------*/
/* List of first loads for Open/Close/EOV routines */
static char *firstload[] = {
"IGC0001I", /* Open (SVC19) */
"IGC0002{", /* Close (SVC20) */
"IGC0002A", /* Stow (SVC21) */
"IGC0002B", /* OpenJ (SVC22) */
"IGC0002C", /* TClose (SVC23) */
"IGC0002I", /* Scratch (SVC29) */
"IGC0003A", /* FEOV (SVC31) */
"IGC0003B", /* Allocate (SVC32) */
"IGC0005E", /* EOV (SVC55) */
"IGC0008A", /* Setprt (SVC81) */
"IGC0008F", /* Atlas (SVC86) */
"IGC0009C", /* TSO (SVC93) */
"IGC0009D", /* TSO (SVC94) */
NULL }; /* End of list */
/* List of second loads for Open/Close/EOV routines */
static char *secondload[] = {
"IFG019", "IGG019", /* Open (SVC19) */
"IFG020", "IGG020", /* Close (SVC20) */
"IGG021", /* Stow (SVC21) */
"IFG023", "IGG023", /* TClose (SVC23) */
"IGG029", /* Scratch (SVC29) */
"IGG032", /* Allocate (SVC32) */
"IFG055", "IGG055", /* EOV (SVC55) */
"IGG081", /* Setprt (SVC81) */
"IGG086", /* Atlas (SVC86) */
"IGG093", /* TSO (SVC93) */
"IGG094", /* TSO (SVC94) */
NULL }; /* End of list */
static BYTE eighthexFF[] = {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
static int process_dirblk( CIFBLK *cif, int noext, DSXTENT extent[],
BYTE *dirblk, MEMINFO memtab[], int *nmem );
static int resolve_xctltab( CIFBLK *cif, int noext, DSXTENT extent[],
MEMINFO *memp, MEMINFO memtab[], int nmem );
// See Below
#if FALSE
static int process_member( CIFBLK *cif, int noext, DSXTENT extent[],
BYTE *memname, BYTE *ttr);
#endif
/*-------------------------------------------------------------------*/
/* DASDISUP main entry point */
/*-------------------------------------------------------------------*/
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 */
int rc; /* Return code */
int i; /* Array subscript */
U16 len; /* Record length */
U32 cyl; /* Cylinder number */
U8 head; /* Head number */
U8 rec; /* Record number */
u_int trk; /* Relative track number */
char *fname; /* -> CKD image file name */
char *sfname; /* -> CKD shadow file name */
int noext; /* Number of extents */
DSXTENT extent[16]; /* Extent descriptor array */
BYTE *blkptr; /* -> PDS directory block */
CIFBLK *cif; /* CKD image file descriptor */
MEMINFO *memtab; /* -> Member info array */
int nmem = 0; /* Number of array entries */
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 ) - 1 );
#endif
pgmname = strdup(basename(path));
#if !defined( _MSVC_ )
strncpy( path, argv[0], sizeof(path) - 1 );
#endif
}
}
else
{
pgmname = strdup( UTILITY_NAME );
}
pgm = strtok_r( strdup(pgmname), ".", &strtok_str);
INITIALIZE_UTILITY( pgm );
/* Display the program identification message */
MSGBUF( msgbuf, MSG_C( HHC02499, "I", pgm, "IEHIOSUP" ) );
display_version( stderr, msgbuf+10, FALSE );
/* Check the number of arguments */
if (argc < 2 || argc > 3)
{
fprintf (stderr, MSG(HHC02463, "I", pgm, "" ));
return -1;
}
/* The first argument is the name of the CKD image file */
fname = argv[1];
/* The next argument, if there, is the name of the shadow file */
if (argc > 2) sfname = argv[2];
else sfname = NULL;
/* Obtain storage for the member information array */
memtab = (MEMINFO*) malloc (sizeof(MEMINFO) * MAX_MEMBERS);
if (memtab == NULL)
{
char buf[80];
MSGBUF( buf, "malloc(%d)", (int)(sizeof(MEMINFO) * MAX_MEMBERS));
fprintf (stdout, MSG(HHC02412, "E", buf, strerror(errno)));
return -1;
}
/* Open the CKD image file */
cif = open_ckd_image (fname, sfname, O_RDWR|O_BINARY, IMAGE_OPEN_NORMAL);
if (cif == NULL) return -1;
/* Build the extent array for the SVCLIB dataset */
rc = build_extent_array (cif, "SYS1.SVCLIB", extent, &noext);
if (rc < 0) return -1;
/* Point to the start of the directory */
trk = 0;
rec = 1;
/* Read the directory */
while (1)
{
/* Convert relative track to cylinder and head */
rc = convert_tt (trk, noext, extent, cif->heads, &cyl, &head);
if (rc < 0) return -1;
/* Read a directory block */
rc = read_block (cif, cyl, head, rec,
NULL, NULL, &blkptr, &len);
if (rc < 0) return -1;
/* Move to next track if block not found */
if (rc > 0)
{
trk++;
rec = 1;
continue;
}
/* Exit at end of directory */
if (len == 0) break;
/* Extract information for each member in directory block */
rc = process_dirblk (cif, noext, extent, blkptr,
memtab, &nmem);
if (rc < 0) return -1;
if (rc > 0) break;
/* Point to the next directory block */
rec++;
} /* end while */
fprintf (stdout, MSG(HHC02464, "I", nmem));
#ifdef EXTERNALGUI
if (extgui) fprintf (stderr,"NMEM=%d\n",nmem);
#endif /*EXTERNALGUI*/
/* Read each member and resolve the embedded TTRs */
for (i = 0; i < nmem; i++)
{
#ifdef EXTERNALGUI
if (extgui) fprintf (stderr,"MEM=%d\n",i);
#endif /*EXTERNALGUI*/
rc = resolve_xctltab (cif, noext, extent, memtab+i,
memtab, nmem);
} /* end for(i) */
/* Close the CKD image file and exit */
rc = close_ckd_image (cif);
free (memtab);
return rc;
} /* end function main */
#if FALSE
/*-------------------------------------------------------------------*/
/* Subroutine to process a member */
/* Input: */
/* cif -> CKD image file descriptor structure */
/* noext Number of extents in dataset */
/* extent Dataset extent array */
/* memname Member name (ASCIIZ) */
/* ttr Member TTR */
/* */
/* Return value is 0 if successful, or -1 if error */
/*-------------------------------------------------------------------*/
static int
process_member (CIFBLK *cif, int noext, DSXTENT extent[],
BYTE *memname, BYTE *ttr)
{
int rc; /* Return code */
int len; /* Record length */
int trk; /* Relative track number */
int cyl; /* Cylinder number */
int head; /* Head number */
int rec; /* Record number */
BYTE *buf; /* -> Data block */
FILE *ofp; /* Output file pointer */
BYTE ofname[256]; /* Output file name */
int offset; /* Offset of record in buffer*/
BYTE card[81]; /* Logical record (ASCIIZ) */
char pathname[MAX_PATH]; /* ofname in host path format*/
/* Build the output file name */
memset (ofname, 0, sizeof(ofname));
strncpy (ofname, memname, 8);
string_to_lower (ofname);
strcat (ofname, ".mac");
/* Open the output file */
hostpath(pathname, ofname, sizeof(pathname));
ofp = fopen (pathname, "w");
if (ofp == NULL)
{
fprintf (stderr,
"Cannot open %s: %s\n",
ofname, strerror(errno));
return -1;
}
/* Point to the start of the member */
trk = (ttr[0] << 8) | ttr[1];
rec = ttr[2];
fprintf (stdout,
"Member %s TTR=%4.4X%2.2X\n",
memname, trk, rec);
/* Read the member */
while (1)
{
/* Convert relative track to cylinder and head */
rc = convert_tt (trk, noext, extent, cif->heads, &cyl, &head);
if (rc < 0) return -1;
// fprintf (stdout,
// "CCHHR=%4.4X%4.4X%2.2X\n",
// cyl, head, rec);
/* Read a data block */
rc = read_block (cif, cyl, head, rec, NULL, NULL, &buf, &len);
if (rc < 0) return -1;
/* Move to next track if record not found */
if (rc > 0)
{
trk++;
rec = 1;
continue;
}
/* Exit at end of member */
if (len == 0) break;
/* Check length of data block */
if (len % 80 != 0)
{
fprintf (stdout,
"Bad block length %d at cyl %d head %d rec %d\n",
len, cyl, head, rec);
return -1;
}
/* Process each record in the data block */
for (offset = 0; offset < len; offset += 80)
{
if (asciiflag)
{
make_asciiz (card, sizeof(card), buf + offset, 72);
fprintf (ofp, "%s\n", card);
}
else
{
fwrite (buf+offset, 80, 1, ofp);
}
if (ferror(ofp))
{
fprintf (stdout,
"Error writing %s: %s\n",
ofname, strerror(errno));
return -1;
}
} /* end for(offset) */
/* Point to the next data block */
rec++;
} /* end while */
/* Close the output file and exit */
fclose (ofp);
return 0;
} /* end function process_member */
#endif
/*-------------------------------------------------------------------*/
/* Subroutine to process a directory block */
/* Input: */
/* cif -> CKD image file descriptor structure */
/* noext Number of extents in dataset */
/* extent Dataset extent array */
/* dirblk Pointer to directory block */
/* Input/output: */
/* memtab Member information array */
/* nmem Number of entries in member information array */
/* */
/* Directory information for each member is extracted from the */
/* directory block and saved in the member information array. */
/* */
/* Return value is 0 if OK, +1 if end of directory, or -1 if error */
/*-------------------------------------------------------------------*/
static int
process_dirblk (CIFBLK *cif, int noext, DSXTENT extent[],
BYTE *dirblk, MEMINFO memtab[], int *nmem)
{
int n; /* Member array subscript */
int i; /* Array subscript */
int totlen; /* Total module length */
int txtlen; /* Length of 1st text block */
int size; /* Size of directory entry */
int k; /* Userdata halfword count */
BYTE *dirptr; /* -> Next byte within block */
int dirrem; /* Number of bytes remaining */
PDSDIR *dirent; /* -> Directory entry */
char memnama[9]; /* Member name (ASCIIZ) */
UNREFERENCED(cif);
UNREFERENCED(noext);
UNREFERENCED(extent);
/* Load number of bytes in directory block */
dirptr = dirblk;
dirrem = (dirptr[0] << 8) | dirptr[1];
if (dirrem < 2 || dirrem > 256)
{
fprintf (stdout, MSG(HHC02400, "E"));
return -1;
}
/* Point to first directory entry */
dirptr += 2;
dirrem -= 2;
/* Process each directory entry */
for (n = *nmem; dirrem > 0; )
{
/* Point to next directory entry */
dirent = (PDSDIR*)dirptr;
/* Test for end of directory */
if (memcmp(dirent->pds2name, eighthexFF, 8) == 0)
return +1;
/* Load the user data halfword count */
k = dirent->pds2indc & PDS2INDC_LUSR;
/* Point to next directory entry */
size = 12 + k*2;
dirptr += size;
dirrem -= size;
/* Extract the member name */
make_asciiz (memnama, sizeof(memnama), dirent->pds2name, 8);
if (dirent->pds2name[7] == OVERPUNCH_ZERO)
memnama[7] = '{';
/* Find member in first load table */
for (i = 0; firstload[i] != NULL; i++)
if (strcmp(memnama, firstload[i]) == 0) break;
/* If not in first table, find in second table */
if (firstload[i] == NULL)
{
for (i = 0; secondload[i] != NULL; i++)
if (memcmp(memnama, secondload[i], 6) == 0) break;
/* If not in second table then skip member */
if (secondload[i] == NULL)
{
fprintf (stdout,
MSG(HHC02450, "I", memnama,
((dirent->pds2indc & PDS2INDC_ALIAS) ?
"alias" : "member")));
continue;
}
} /* end if(firstload[i]==NULL) */
/* Check that member information array is not full */
if (n >= MAX_MEMBERS)
{
fprintf (stdout, MSG(HHC02451, "I"));
return -1;
}
/* Check that user data contains at least 1 TTR */
if (((dirent->pds2indc & PDS2INDC_NTTR) >> PDS2INDC_NTTR_SHIFT)
< 1)
{
fprintf (stdout, MSG(HHC02452, "E", memnama));
return -1;
}
/* Extract the total module length */
totlen = (dirent->pds2usrd[10] << 16)
| (dirent->pds2usrd[11] << 8)
| dirent->pds2usrd[12];
/* Extract the length of the first text block */
txtlen = (dirent->pds2usrd[13] << 8)
| dirent->pds2usrd[14];
/* Save member information in the array */
memcpy (memtab[n].memname, dirent->pds2name, 8);
memcpy (memtab[n].ttrtext, dirent->pds2usrd + 0, 3);
memtab[n].dwdsize = totlen / 8;
/* Flag the member if it is an alias */
memtab[n].alias = (dirent->pds2indc & PDS2INDC_ALIAS) ? 1 : 0;
/* Flag member if 7th character of name is non-numeric */
memtab[n].notable = (memnama[6] < '0' || memnama[6] > '9') ?
1 : 0;
/* Check that the member has a single text record */
if ((dirent->pds2usrd[8] & 0x01) == 0 || totlen != txtlen)
{
fprintf (stdout, MSG(HHC02453, "W", memnama));
memtab[n].multitxt = 1;
}
/* Check that the total module length does not exceed X'7F8' */
if (totlen > 255*8)
{
fprintf (stdout, MSG(HHC02454, "W", memnama, totlen));
}
/* Check that the total module length is a multiple of 8 */
if (totlen & 0x7)
{
fprintf (stdout, MSG(HHC02455, "W", memnama, totlen));
}
/* Increment number of entries in table */
*nmem = ++n;
} /* end for */
return 0;
} /* end function process_dirblk */
/*-------------------------------------------------------------------*/
/* Subroutine to resolve TTRs embedded within a member */
/* Input: */
/* cif -> CKD image file descriptor structure */
/* noext Number of extents in dataset */
/* extent Dataset extent array */
/* memp Array entry for member whose TTRs are to be resolved */
/* memtab Member information array */
/* nmem Number of entries in member information array */
/* */
/* Return value is 0 if OK, -1 if error */
/*-------------------------------------------------------------------*/
static int
resolve_xctltab (CIFBLK *cif, int noext, DSXTENT extent[],
MEMINFO *memp, MEMINFO memtab[], int nmem)
{
int rc; /* Return code */
int i; /* Array subscript */
U16 len; /* Record length */
U32 cyl; /* Cylinder number */
U8 head; /* Head number */
U8 rec; /* Record number */
u_int trk; /* Relative track number */
int xctloff; /* Offset to XCTL table */
int warn; /* 1=Flag TTRL difference */
BYTE *blkptr; /* -> Text record data */
char memnama[9]; /* Member name (ASCIIZ) */
BYTE svcnum[3]; /* SVC number (EBCDIC) */
BYTE prefix[3]; /* IGG/IFG prefix (EBCDIC) */
BYTE refname[8]; /* Referred name (EBCDIC) */
char refnama[9]; /* Referred name (ASCIIZ) */
/* Extract the member name */
make_asciiz (memnama, sizeof(memnama), memp->memname, 8);
if (memp->memname[7] == OVERPUNCH_ZERO)
memnama[7] = '{';
/* Skip the member if it is an alias */
if (memp->alias)
{
fprintf (stdout, MSG(HHC02450, "I", memnama, "alias"));
return 0;
}
/* Skip the member if it has no XCTL table */
if (memp->notable)
{
fprintf (stdout, MSG(HHC02450, "I", memnama, "member"));
return 0;
}
/* Error if member is not a single text record */
if (memp->multitxt)
{
fprintf (stdout, MSG(HHC02444, "E", memnama));
return -1;
}
/* Convert relative track to cylinder and head */
trk = (memp->ttrtext[0] << 8) | memp->ttrtext[1];
rec = memp->ttrtext[2];
rc = convert_tt (trk, noext, extent, cif->heads, &cyl, &head);
if (rc < 0)
{
fprintf (stdout, MSG(HHC02456, "E", memnama, trk, rec));
return -1;
}
fprintf (stdout, MSG(HHC02457, "I",
memnama, trk, rec, cyl, head, rec));
/* Read the text record */
rc = read_block (cif, cyl, head, rec,
NULL, NULL, &blkptr, &len);
if (rc != 0)
{
fprintf (stdout, MSG(HHC02458, "E", memnama, trk, rec));
return -1;
}
/* Check for incorrect length record */
if (len < 8 || len > 1024 || (len & 0x7))
{
fprintf (stdout, MSG(HHC02459, "E", memnama, trk, rec, len));
return -1;
}
/* Check that text record length matches directory entry */
if (len != memp->dwdsize * 8)
{
fprintf (stdout, MSG(HHC02460, "E",
memnama, trk, rec, len, memp->dwdsize * 8));
return -1;
}
/* Extract the SVC number and the XCTL table offset
from the last 4 bytes of the text record */
memcpy (svcnum, blkptr + len - 4, sizeof(svcnum));
xctloff = blkptr[len-1] * 8;
/* For the first load of SVC 19, 20, 23, and 55, and for
IFG modules, the table is in two parts. The parts are
separated by a X'FFFF' delimiter. The first part refers
to IFG modules, the second part refers to IGG modules */
if ((memcmp(memnama, "IGC", 3) == 0
&& (memcmp(svcnum, "\xF0\xF1\xF9", 3) == 0
|| memcmp(svcnum, "\xF0\xF2\xF0", 3) == 0
|| memcmp(svcnum, "\xF0\xF2\xF3", 3) == 0
|| memcmp(svcnum, "\xF0\xF5\xF5", 3) == 0))
|| memcmp(memnama, "IFG", 3) == 0)
convert_to_ebcdic (prefix, sizeof(prefix), "IFG");
else
convert_to_ebcdic (prefix, sizeof(prefix), "IGG");
/* Process each entry in the XCTL table */
while (1)
{
/* Exit at end of XCTL table */
if (blkptr[xctloff] == HEX00 && blkptr[xctloff+1] == HEX00)
break;
/* Switch prefix at end of first part of table */
if (blkptr[xctloff] == HEXFF && blkptr[xctloff+1] == HEXFF)
{
xctloff += 2;
convert_to_ebcdic (prefix, sizeof(prefix), "IGG");
continue;
}
/* Error if XCTL table overflows text record */
if (xctloff >= len - 10)
{
fprintf (stdout, MSG(HHC02461, "E", memnama, trk, rec));
return -1;
}
/* Skip this entry if the suffix is blank */
if (blkptr[xctloff] == HEX40
&& blkptr[xctloff+1] == HEX40)
{
xctloff += 6;
continue;
}
/* Build the name of the member referred to */
memcpy (refname, prefix, 3);
memcpy (refname + 3, svcnum, 3);
memcpy (refname + 6, blkptr+xctloff, 2);
make_asciiz (refnama, sizeof(refnama), refname, 8);
/* Find the referred member in the member array */
for (i = 0; i < nmem; i++)
{
if (memcmp(memtab[i].memname, refname, 8) == 0)
break;
} /* end for(i) */
/* Loop if member not found */
if (i == nmem)
{
char buf[80];
MSGBUF( buf, " member '%s' not found", refnama);
/* Display XCTL table entry */
fprintf (stdout, MSG(HHC02462, "I", memnama, refnama,
blkptr[xctloff+2], blkptr[xctloff+3],
blkptr[xctloff+4], blkptr[xctloff+5], buf));
xctloff += 6;
continue;
}
/* Loop if TTRL in the XCTL table matches actual TTRL */
if (memcmp(blkptr+xctloff+2, memtab[i].ttrtext, 3) == 0
&& blkptr[xctloff+5] == memtab[i].dwdsize)
{
/* Display XCTL table entry */
fprintf (stdout, MSG(HHC02462, "I", memnama, refnama,
blkptr[xctloff+2], blkptr[xctloff+3],
blkptr[xctloff+4], blkptr[xctloff+5], ""));
xctloff += 6;
continue;
}
/* Flag entries whose L differs */
if (blkptr[xctloff+5] != memtab[i].dwdsize)
warn = 1;
else
warn = 0;
/* Replace TTRL in the XCTL table by the actual TTRL */
memcpy (blkptr+xctloff+2, memtab[i].ttrtext, 3);
blkptr[xctloff+5] = memtab[i].dwdsize;
{
char buf[80];
MSGBUF( buf, " replaced by TTRL=%02X%02X%02X%02X %s",
blkptr[xctloff+2], blkptr[xctloff+3],
blkptr[xctloff+4], blkptr[xctloff+5],
(warn ? "****" : ""));
/* Display XCTL table entry */
fprintf (stdout, MSG(HHC02462, "I", memnama, refnama,
blkptr[xctloff+2], blkptr[xctloff+3],
blkptr[xctloff+4], blkptr[xctloff+5], buf));
}
/* Flag the track as modified to force rewrite */
cif->trkmodif = 1;
/* Point to next entry in XCTL table */
xctloff += 6;
} /* end while */
return 0;
} /* end function resolve_xctltab */