10-Mar-88 00:50:24-PST,10025;000000000001
Return-Path: <@RELAY.CS.NET:takagi@icot.jp>
Date: Thu, 10 Mar 88 13:33:10 JST
From: Takagi Shigeyuki <takagi%icot.jp@RELAY.CS.NET>
Subject: Symmetry undump

Dear Dr. MacKay and TeXhax readers:

Dr. Chikayama modified the Balance version of undump for Symmetry.
This is now running on our Symmetry and used for installing TeX.

I expect that the moderator of texhax will split the actual shar file
and ship only this message to texhax.

The actual shar file will be included in the UNIX TeX distribution from
U. of Washington and also kept in the public directory at SCORE.

The same thing was done for Balance undump before.

S.Takagi, Japanese TeXhax re-distribution
takagi%icot.jp@relay.cs.net
======================================================================
#!/bin/sh
# to extract, remove the header and type "sh filename"
if `test ! -s ./Makefile.SYMMETRY`
then
echo "writing ./Makefile.SYMMETRY"
cat > ./Makefile.SYMMETRY << '\Rogue\Monster\'
BINDIR=/usr/local/bin
CFLAGS = -O

undump: & undump.o scanargs.o
	cc -o undump undump.o scanargs.o

clean:
	rm -f *.o

install: undump
	cp undump $(BINDIR)
\Rogue\Monster\
else
  echo "will not over write ./Makefile.SYMMETRY"
fi
chmod 444 ./Makefile.SYMMETRY
if [ `wc -c ./Makefile.SYMMETRY | awk '{printf $1}'` -ne 156 ]
then
echo `wc -c ./Makefile.SYMMETRY | awk '{print "Got " $1 ", Expected " 156}'`
fi
if `test ! -s ./Setup.SYMMETRY`
then
echo "writing ./Setup.SYMMETRY"
cat > ./Setup.SYMMETRY << '\Rogue\Monster\'
# /bin/sh
# setup the ./undump area for Sequent Symmetry/DYNIX
cp Makefile.SYMMETRY Makefile
cp undump.SYMMETRY.c undump.c
\Rogue\Monster\
else
  echo "will not over write ./Setup.SYMMETRY"
fi
chmod 555 ./Setup.SYMMETRY
if [ `wc -c ./Setup.SYMMETRY | awk '{printf $1}'` -ne 123 ]
then
echo `wc -c ./Setup.SYMMETRY | awk '{print "Got " $1 ", Expected " 123}'`
fi
if `test ! -s ./undump.SYMMETRY.c`
then
echo "writing ./undump.SYMMETRY.c"
cat > ./undump.SYMMETRY.c << '\Rogue\Monster\'
/*
 * This program is hacked for Sequent Balance.
 * The original is from 4.2undump.c of UNIX TeX distribution.
 * This is tested on Serquent Balance 21000, DYNIX 2.1.1
 * with UNIX TeX 2.1.  Modification may be necessary for newer DYNIX.
 *  Takashi Chikayama, ICOT Research Center.
 */

/*
 * This program was advertised on unix-wizards.  I have had such a large
 * response I'm sending it out to the world.
 * 
 * Here is the source.  It works fine under 4.1bsd, I see no fundamental
 * reason why it shouldn't work on an 11. (Except possibly small format
 * changes in exec header or user structure.)  No documentation yet.
 * Usage is
 *        undump new-a.out-file [old-a.out-file] [core-file]
 * where old-a.out-file and core-file default to "a.out" and "core",
 * respectively.  Probably should have an option to not require
 * old-a.out-file if the core came from a 407 file.
 * 
 * It doesn't preserve open files, and the program is re-entered at main
 * when you run it.  It's used locally to dump a lisp and restart it.
 * 
 * It requires a local subroutine called scanargs, somewhat similar to
 * getopt (I think).  You should be able to easily get around this, though.
 * =Spencer
 */


/*
 * undump.c - Convert a core file to an a.out.
 *
 * Author:	Spencer W. Thomas
 * 		Computer Science Dept.
 * 		University of Utah
 * Date:	Wed Feb 17 1982
 * Copyright (c) 1982 Spencer W. Thomas
 *
 * Modification for Balance/DYNIX 2.1.1:
 *		Takashi Chikayama
 *		ICOT Research Center
 * Date:	Wed Nov 25 1987
 * Copyright (c) 1987 Takashi Chikayama
 * See copy_text for details.
 *
 * Usage:
 * undump new-a.out [a.out] [core]
 */

#include <stdio.h>
#include <sys/param.h>
#include <sys/dir.h>
#include <sys/user.h>
#include <sys/stat.h>
#include <a.out.h>

#define PSIZE	    10240

struct user u;
struct exec hdr, ohdr;

main(argc, argv)
char **argv;
{
    char *new_name, *a_out_name = "a.out", *core_name = "core";
    FILE *new, *a_out, *core;

    if (scanargs(argc, argv, "undump new-a.out!s a.out%s core%s",
	    &new_name, &a_out_name, &core_name)
		    != 1)
	exit(1);

    if ((a_out = fopen(a_out_name, "r")) == NULL)
    {
	perror(a_out_name);
	exit(1);
    }
    if ((core = fopen(core_name, "r")) == NULL)
    {
	perror(core_name);
	exit(1);
    }
    if ((new = fopen(new_name, "w")) == NULL)
    {
	perror(new_name);
	exit(1);
    }

    read_u(core);
    make_hdr(new, a_out);
    copy_text(new, a_out);
    copy_data(new, core);
    copy_sym(new, a_out);
    fclose(new);
    fclose(core);
    fclose(a_out);
    mark_x(new_name);
}

/*
 * read the u structure from the core file.
 */
read_u(core)
FILE *core;
{
    if ( fread(&u, sizeof u, 1, core) != 1 )
    {
	perror("Couldn't read user structure from core file");
	exit(1);
    }
}

/*
 * Make the header in the new a.out from the header in the old one
 * modified by the new data size.
 */
make_hdr(new, a_out)
FILE *new, *a_out;
{
    if (fread(&hdr, sizeof hdr, 1, a_out) != 1)
    {
	perror("Couldn't read header from a.out file");
	exit(1);
    }
    ohdr = hdr;
    if N_BADMAG(hdr)
    {
	fprintf(stderr, "a.out file doesn't have legal magic number\n");
	exit(1);
    }

/*** Checks are omitted for now. (T.C.)
    if (hdr.a_magic != u.u_exdata.ux_mag ||
	hdr.a_text != u.u_exdata.ux_tsize ||
	hdr.a_data != u.u_exdata.ux_dsize ||
	hdr.a_entry != u.u_exdata.ux_entloc)
    {
	fprintf(stderr, "Core file didn't come from this a.out\n");
	exit(1);
    }
***/

    printf("Data segment size was %u", hdr.a_data);
/*
 * Modification by T.C.:
 *	u_dsize is text+data size (rather than data size) on Symmetry.
 */
    hdr.a_data = ctob(u.u_dsize-u.u_tsize);
    hdr.a_bss = 0;			/* all data is inited now! */
    printf(" now is %u\n", hdr.a_data);
    if (fwrite(&hdr, sizeof hdr, 1, new) != 1)
    {
	perror("Couldn't write header to new a.out file");
	exit(1);
    }
}

/*
 * Copy the text from the a.out to the new a.out
 */
copy_text(new, a_out)
FILE *new, *a_out;
{
    char page[PSIZE];
/*
 * Modification by T.C.:
 *	Text size is actually smaller in files in case of DYNIX.
 *	As a_text includes exec structure, we avoid overwriting it here.
 */
    int txtcnt = hdr.a_text - N_ADDRADJ(hdr) - sizeof(struct exec);
    fseek(new, sizeof(struct exec), 0);
    fseek(a_out, sizeof(struct exec), 0);
    if (hdr.a_magic == OMAGIC)
    {
	printf("a.out file is not shared text, getting text from core file\n");
	fseek(a_out, hdr.a_text, 1);	/* skip over text */
	return;
    }
    while (txtcnt >= PSIZE)
    {
	if (fread(page, PSIZE, 1, a_out) != 1)
	{
	    perror("Read failure on a.out text");
	    exit(1);
	}
	if (fwrite(page, PSIZE, 1, new) != 1)
	{
	    perror("Write failure in text segment");
	    exit(1);
	}
	txtcnt -= PSIZE;
    }
    if (txtcnt)
    {
	if (fread(page, txtcnt, 1, a_out) != 1)
	{
	    perror("Read failure on a.out text");
	    exit(1);
	}
	if (fwrite(page, txtcnt, 1, new) != 1)
	{
	    perror("Write failure in text segment");
	    exit(1);
	}
    }
}

/*
 * copy the data from the core file to the new a.out
 */
copy_data(new, core)
FILE *new, *core;
{
    char page[PSIZE];
    int datacnt = ctob(u.u_dsize);

/*
 * Modification by T.C.:
 *	u_dsize is text+data size (rather than data size) on Symmetry.
 */
    if (hdr.a_magic != OMAGIC)
	datacnt -= ctob(u.u_tsize);
    fseek(core, ctob(UPAGES), 0);
    while (datacnt >= PSIZE)
    {
	if (fread(page, PSIZE, 1, core) != 1)
	{
	    perror("Read failure on core data");
	    exit(1);
	}
	if (fwrite(page, PSIZE, 1, new) != 1)
	{
	    perror("Write failure in data segment");
	    exit(1);
	}
	datacnt -= PSIZE;
    }
    if (datacnt)
    {
	if (fread(page, datacnt, 1, core) != 1)
	{
	    perror("Read failure on core data");
	    exit(1);
	}
	if (fwrite(page, datacnt, 1, new) != 1)
	{
	    perror("Write failure in data segment");
	    exit(1);
	}
    }
}

/*
 * Copy the relocation information and symbol table from the a.out to the new
 */
copy_sym(new, a_out)
FILE *new, *a_out;
{
    char page[PSIZE];
    int n;

/*
 * Modification by T.C.:
 *	Use macro N_SYMOFF to compute symbol table offset.
 */
    fseek(a_out, N_SYMOFF(ohdr), 0);	/* find symbol table */
    while ((n = fread(page, 1, PSIZE, a_out)) > 0)
    {
	if (fwrite(page, 1, n, new) != n)
	{
	    perror("Error writing symbol table to new a.out");
	    fprintf(stderr, "new a.out should be ok otherwise\n");
	    return;
	}
    }
    if (n < 0)
    {
	perror("Error reading symbol table from a.out");
	fprintf(stderr, "new a.out should be ok otherwise\n");
    }
}

/*
 * After succesfully building the new a.out, mark it executable
 */
mark_x(name)
char *name;
{
    struct stat sbuf;
    int um;

    um = umask(777);
    umask(um);
    if (stat(name, &sbuf) == -1)
    {
	perror ("Can't stat new a.out");
	fprintf(stderr, "Setting protection to %o\n", 0777 & ~um);
	sbuf.st_mode = 0777;
    }
    sbuf.st_mode |= 0111 & ~um;
    if (chmod(name, sbuf.st_mode) == -1)
	perror("Couldn't change mode of new a.out to executable");

}

\Rogue\Monster\
else
  echo "will not over write ./undump.SYMMETRY.c"
fi
chmod 444 ./undump.SYMMETRY.c
if [ `wc -c ./undump.SYMMETRY.c | awk '{printf $1}'` -ne 6973 ]
then
echo `wc -c ./undump.SYMMETRY.c | awk '{print "Got " $1 ", Expected " 6973}'`
fi
echo "Finished archive 1 of 1"
exit

-------