Otherware/Otherware_1_SB_Development.iso/mac/util/unix/unsea10.sha

Internet Message Format | 1992-11-05 | 45.0 KB

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From: "David W. Rankin Jr." <[e-mail]>
Date: Sun, 9 Aug 1992 17:26:16 EDT
X-Mailer: Mail User's Shell (7.1.2 7/11/90)
To: [e-mail]
Subject: Unsea 1.0 is here
Message-Id:  <[e-mail]>

This letter marks the formal release of unsea 1.0. Unsea is a mainframe-
level ANSI C program that removes the self-expanding code from MacBinary
encoded StuffIt(TM) or Compact Pro(TM) files.
Since unsea is ANSI C, you'll have to use an ANSI C compiler (like gcc)
to compile it. (The reason for this is that the only C referecnce book
is the 2nd edition of the K&R book, so I simply couldn't write it
as K&R C code.)

To put it on your system, get the shar file(see below for where) and
delete anything above the line "#!/bin/sh". Then unarchive it, using
"sh <filename>" for UNIX machines or your local shar decoder for other
machines. Then follow the instructions in "unsea.txt" and "Makefile"
to compile the program.

The newest version of unsea will always be available on f.ms.uky.edu,
in the /pub/mac/unix directory, as well as anyone who is on the MacGifts
list that mac.archive.umich.edu runs.

Feel free to send any questions you have about unsea to me at
rankin=[e-mail], rankin=[e-mail] or rankin=[e-mail].

---------------CUT HERE---------------------
#! /bin/sh
: This is a shell archive, meaning:
: 1. Remove everything above the '#! /bin/sh' line.
: 2. Save the resulting text in a file.
: 3. Execute the file with /bin/sh '(not csh)' to create the files:
:    'Makefile'
:    'convert.c'
:    'file.c'
:    'macbin.c'
:    'unsea.c'
:    'unsea.h'
:    'unsea.testers'
:    'unsea.txt'
:    'version.c'
: This archive created: 'Sun Aug  9 15:01:22 1992
'
export PATH; PATH=/bin:$PATH
if test -f 'Makefile'
then
    echo shar: will not over-write existing file "'Makefile'"
else
sed 's/^X//'  >'Makefile' <<'SHAR_EOF'
X
X# Makefile for the unsea program
X#     Copyright 1992 David W. Rankin, Jr.
X#
X# See unsea.txt for all copyright details
X
X# Command line syntax:
X#       make [option]
X
X# Options:
X#
X#       unsea
X#         This option is the one you should pick for actually compiling
X#         unsea. It uses prepare (see below) to compile the code as needed.
X#
X#       prepare
X#         This option, mainly for the use of the makefile itself, creates
X#         the object code for the unsea options.
X#
X#       clean
X#         Removes the file "unsea" and all objects from the directory.
X
X
X# Makefile variables:
X
X# CC is the variable holding your compiler's name. The values used by a couple
X# of the systems I know about are here, as well as the default value, GNU's
X# gcc compiler. If you require a different value here, be sure to include any
X# flags required to make your compiler ANSI compliant, if necessary.
X
X# On NeXTs and AIX, both come with ANSI compatable "cc" compilers standard.
X# Therefore, they are fine for unsea, although for AIX I still recommend gcc
X# if you have it. (NeXTs actually use gcc as their standard compiler, so you
X# don't need to get gcc for them except to upgrade.)
X
X#CC=cc
X
X# For DYNIX (Sequent), A/UX (Apple UNIX), and SunOS, all the standard "cc"
X# compilers I've seen are NOT ANSI compliant, so you will have to use gcc or
X# another ANSI C compiler. I'll default here to "gcc".
X# I think this is also true for ULTRIX (VAX) and HP-UX, but I wasn't able
X# to check it out before releasing this version. I have no idea about any
X# other OSes, so I have to assume they need gcc as well.
XCC = gcc
X
X# CFLAGS specifies whether the compiler should allow for debugging
X# (-g) or optimization of the code (-O). -O is recommended.
X# Any other flags your compiler likes or needs should go here.
X
XCFLAGS = -O
X
X# Some compilers require specific libraries to be added during the program
X# generation. LIBS should be used for this purpose, as well as any flags
X# needed during the linking part only. Here are some choices that I know
X# work on the machines I've seen so far. (Feel free to change this, I can't
X# know what libraries you actually have.)
X
X#For DYNIX (Sequents):
X#LIBS= -lseq
X
X# For everyone else...
XLIBS=
X
X#                *STOP*
X# You should not change anything below here.
X
XSOURCES = unsea.c convert.c version.c file.c macbin.c
X
XOBJECTS = unsea.o convert.o version.o file.o macbin.o
X
Xunsea:
X    @make prepare
X    @$(CC) $(CFLAGS) -o unsea $(LIBS) $(OBJECTS)
X
X
Xprepare:
X    @$(CC) -c $(CFLAGS) $(SOURCES)
X
Xclean:
X    rm -fr unsea $(OBJECTS)
X
SHAR_EOF
fi # end of overwriting check
if test -f 'convert.c'
then
    echo shar: will not over-write existing file "'convert.c'"
else
sed 's/^X//'  >'convert.c' <<'SHAR_EOF'
X/* convert.c - Part of the unsea program.
X *   Copyright 1992 by David W. Rankin, Jr.
X *
X * See "unsea.txt" for full copyright information applying
X * to all text in this package.
X *
X *
X * This file contains the source code for the converters and interpreters
X * within unsea, including the CRC conversion constants. */
X
X
X#include "unsea.h"
X
X/* crctab based upon BinHex and MacBinary standard CRC "seed" of
X * 0x1021. */
Xconst unsigned short crctab[] = {
X    0x0000,  0x1021,  0x2042,  0x3063,  0x4084,  0x50a5,  0x60c6,  0x70e7,
X    0x8108,  0x9129,  0xa14a,  0xb16b,  0xc18c,  0xd1ad,  0xe1ce,  0xf1ef,
X    0x1231,  0x0210,  0x3273,  0x2252,  0x52b5,  0x4294,  0x72f7,  0x62d6,
X    0x9339,  0x8318,  0xb37b,  0xa35a,  0xd3bd,  0xc39c,  0xf3ff,  0xe3de,
X    0x2462,  0x3443,  0x0420,  0x1401,  0x64e6,  0x74c7,  0x44a4,  0x5485,
X    0xa56a,  0xb54b,  0x8528,  0x9509,  0xe5ee,  0xf5cf,  0xc5ac,  0xd58d,
X    0x3653,  0x2672,  0x1611,  0x0630,  0x76d7,  0x66f6,  0x5695,  0x46b4,
X    0xb75b,  0xa77a,  0x9719,  0x8738,  0xf7df,  0xe7fe,  0xd79d,  0xc7bc,
X    0x48c4,  0x58e5,  0x6886,  0x78a7,  0x0840,  0x1861,  0x2802,  0x3823,
X    0xc9cc,  0xd9ed,  0xe98e,  0xf9af,  0x8948,  0x9969,  0xa90a,  0xb92b,
X    0x5af5,  0x4ad4,  0x7ab7,  0x6a96,  0x1a71,  0x0a50,  0x3a33,  0x2a12,
X    0xdbfd,  0xcbdc,  0xfbbf,  0xeb9e,  0x9b79,  0x8b58,  0xbb3b,  0xab1a,
X    0x6ca6,  0x7c87,  0x4ce4,  0x5cc5,  0x2c22,  0x3c03,  0x0c60,  0x1c41,
X    0xedae,  0xfd8f,  0xcdec,  0xddcd,  0xad2a,  0xbd0b,  0x8d68,  0x9d49,
X    0x7e97,  0x6eb6,  0x5ed5,  0x4ef4,  0x3e13,  0x2e32,  0x1e51,  0x0e70,
X    0xff9f,  0xefbe,  0xdfdd,  0xcffc,  0xbf1b,  0xaf3a,  0x9f59,  0x8f78,
X    0x9188,  0x81a9,  0xb1ca,  0xa1eb,  0xd10c,  0xc12d,  0xf14e,  0xe16f,
X    0x1080,  0x00a1,  0x30c2,  0x20e3,  0x5004,  0x4025,  0x7046,  0x6067,
X    0x83b9,  0x9398,  0xa3fb,  0xb3da,  0xc33d,  0xd31c,  0xe37f,  0xf35e,
X    0x02b1,  0x1290,  0x22f3,  0x32d2,  0x4235,  0x5214,  0x6277,  0x7256,
X    0xb5ea,  0xa5cb,  0x95a8,  0x8589,  0xf56e,  0xe54f,  0xd52c,  0xc50d,
X    0x34e2,  0x24c3,  0x14a0,  0x0481,  0x7466,  0x6447,  0x5424,  0x4405,
X    0xa7db,  0xb7fa,  0x8799,  0x97b8,  0xe75f,  0xf77e,  0xc71d,  0xd73c,
X    0x26d3,  0x36f2,  0x0691,  0x16b0,  0x6657,  0x7676,  0x4615,  0x5634,
X    0xd94c,  0xc96d,  0xf90e,  0xe92f,  0x99c8,  0x89e9,  0xb98a,  0xa9ab,
X    0x5844,  0x4865,  0x7806,  0x6827,  0x18c0,  0x08e1,  0x3882,  0x28a3,
X    0xcb7d,  0xdb5c,  0xeb3f,  0xfb1e,  0x8bf9,  0x9bd8,  0xabbb,  0xbb9a,
X    0x4a75,  0x5a54,  0x6a37,  0x7a16,  0x0af1,  0x1ad0,  0x2ab3,  0x3a92,
X    0xfd2e,  0xed0f,  0xdd6c,  0xcd4d,  0xbdaa,  0xad8b,  0x9de8,  0x8dc9,
X    0x7c26,  0x6c07,  0x5c64,  0x4c45,  0x3ca2,  0x2c83,  0x1ce0,  0x0cc1,
X    0xef1f,  0xff3e,  0xcf5d,  0xdf7c,  0xaf9b,  0xbfba,  0x8fd9,  0x9ff8,
X    0x6e17,  0x7e36,  0x4e55,  0x5e74,  0x2e93,  0x3eb2,  0x0ed1,  0x1ef0
X    };
X
Xunsigned short updatecrc(unsigned char i, unsigned short crc)
X{
X    extern const unsigned short crctab[];
X
X    return ((crc<<8) ^ crctab[(crc>>8) ^ i]);
X
X} /* end of updatecrc() */
X
Xvoid convert_mb_header(unsigned char block[])
X
X{
X    extern struct starting_flags stflags;
X
X    char newfilename[64], oldfilename[64];
X            /* 64 is one more than the maximum length of a file in a
X             * MB archive */
X
X    unsigned short crc = 0;
X
X    int i, j;
X
X
X    j= (int) (block[1]);
X
X    for(i=0; i<=j; i++)
X        oldfilename[i] = block[i+2];
X
X    strcpy(newfilename,"");
X
X    /* Let's get the name converted here... (j is the length of the
X     * new file name, which is not necessarily the same size as
X     * the old one (but still less than 63 chars long) */
X
X    convert_file_name(oldfilename, newfilename,FALSE);
X        /* the FALSE means that cfn() will leave the filename alone if it
X         * doesn't have *.sea as its structure (the optimal choice for
X         * the internal name of a MacBinary file, since a lot of them have
X         * more unconventional names. */
X
X    j=strlen(newfilename);
X
X    block[1] = j; /* put that length in the new block */
X
X    for(i=0;i<j;i++)
X        block[i+2] = newfilename[i];
X
X    /* Now, we have to \0 the rest of the name space, as per
X     * the standard. */
X
X    for(i=(j+2); i<65; i++)
X        block[i]= '\0';
X
X    /* Let's change the creator and type, as appropriate.*/
X
X    switch (stflags.sea_mode)
X        {
X        case 1: /* Compact Pro SEAs */
X            /* first the type */
X            restypecopy(block, 65, "PACT");
X
X            /* then the creator */
X            restypecopy(block, 69, "CPCT");
X
X             break;
X
X         case 3: /* StuffIt SEAs */
X             /* first the type */
X            restypecopy(block, 65, "SITD");
X
X            /* then the creator */
X            restypecopy(block, 69, "SIT!");
X
X            break;
X
X        }
X
X    /* Now, let's tell the Finder that the SEA doesn't have an icon, by
X     * zeroing the BNDL flag bit. */
X
X    block[73] = block[73] & 0xdf;
X
X    /* Need to make the resource block into length 0 */
X    block[87]=block[88]=block[89]=block[90]=0;
X
X/* The MB2 parts of unsea don't work right, so I am making all unsea
X * files MB1. The MB2 code is left in here for copyright's sake, however. *
X    /* for safety's sake, let's upgrade all MB files to MB 2 status *
X
X    block[122]=block[123]=129;
X
X    /* finally, we need to redo the CRC blocks for the header *
X
X    for(i=0;i<124;i++)
X
X        crc = updatecrc(block[i], crc);
X
X    block[124] = (char) ((crc&0xff00)>>8); /* high byte of the CRC-16 *
X
X    block[125] = (char) (crc&0xff); /* the low order of the CRC-16 *
X
X    /* now we are done [CRC stuff] */
X/* Here's the MB1 hack code. */
X    block[122]=block[123]=block[124]=block[125]=0;
X/* End of MB1 hack */
X
X    return;
X
X} /* end of convert_mb_header() */
X
Xunsigned long int getforksize(unsigned char block[4])
X{ /* This routine takes 4 type unsigned char #s and makes them into
X   * a type unsigned long. Used mainly to determine the length of the
X   * two forks of the MacBinary and BinHex files. */
X
X    unsigned long int x;
X
X    x=((unsigned long)(block[0])<<24)|((unsigned long)(block[1])<<16);
X
X    x+=((unsigned long)(block[2])<<8)|((unsigned long) (block[3]));
X
X    return x;
X
X} /* end of getforksize() */
X
Xunsigned long getblocksize(unsigned long x)
X{ /* Converts an unsigned long byte count into an unsigned byte block
X   * count. Used by unsea_mb() */
X
X    unsigned long y;
X
X    y = (x / 128);
X
X    if (x % 128)
X
X        y++;
X
X    return y;
X
X} /* End of getblocksize() */
X
Xint convert_file_name(char *oldfname, char *newfname, const int convert_all)
X
X{
X    /* NOTE: This routine either assumes the file is of form *.sea.bin
X     * or of form *.sea. If neither, then it names the file "new_*",
X     * with a maximum length of the lesser of FILENAME_MAX and 63. */
X
X    extern struct starting_flags stflags;
X
X    int i;
X
X    strcpy(newfname, oldfname);
X
X    i = strlen(newfname);
X
X    if((!strncmp(&newfname[i-3],"bin",3))||(!strncmp(&newfname[i-3],"BIN",3)))
X        {
X        /* if the file has the suffix *.bin, check if it has the form
X         * *.sea.bin.  */
X        if((!strncmp(&newfname[i-7],"sea",3))||(!strncmp(&newfname[i-7],"SEA",3)))
X
X            switch (stflags.sea_mode) {
X            case 1:
X                strncpy(&newfname[i-7],"cpt",3);
X                break;
X
X            case 3:
X                strncpy(&newfname[i-7],"sit",3);
X                break;
X
X            default:
X                printf("Catastrophic value error in sea_mode.\n");
X                return 1;
X            }
X        else /* It doesn't have *.sea.bin, so make it new_*.bin */
X            {
X            strcpy(newfname, "new_");
X            strcat(newfname, oldfname);
X            newfname[63]= '\0'; /* Maximum length is 63 characters, if it
X                                 * does not know better. (see below) */
X            }
X
X        }
X    /* it doesn't have *.bin, so convert from there */
X    /* Here if of form *.sea*/
X    else if((!strncmp(&newfname[i-3],"sea",3))||(!strncmp(&newfname[i-3],"SEA",3)))
X            {
X            switch (stflags.sea_mode)
X                {
X                case 1:
X                    strncpy(&newfname[i-3],"cpt",3);
X                    break;
X
X                case 3:
X                    strncpy(&newfname[i-3],"sit",3);
X                    break;
X
X                default:
X                    printf("Catastrophic value error in sea_mode\n");
X                    return 1;
X                }
X
X            }
X
X    else if (convert_all)
X        /* If none of these, and the calling routine desires all file
X         * names to be converted... */
X            {
X
X            strcpy(newfname, "new_");
X
X            strcat(newfname, oldfname);
X
X            newfname[63]= '\0'; /* see comment at last newfname[63]='\0' */
X
X            }
X        /* end of if statements */
X
X    return 0;
X
X} /* end of convert_file_name() */
SHAR_EOF
fi # end of overwriting check
if test -f 'file.c'
then
    echo shar: will not over-write existing file "'file.c'"
else
sed 's/^X//'  >'file.c' <<'SHAR_EOF'
X/* block.c - Part of the unsea program.
X *   Copyright 1992 by David W. Rankin, Jr.
X *
X * See "unsea.txt" for full copyright information applying
X * to all text in this package.
X *
X *
X * Contains ANSI C library functions for reading blocks of chars,
X * along with normal paranoia about error checking. :) */
X
X#include "unsea.h"
X
Xint getfileblock(FILE *fp, unsigned char block[], const int blocksize)
X
X{    size_t i=0;
X
X    i = fread(block, 1, blocksize, fp);
X
X    if ( (i != blocksize) || ferror(fp) || feof(fp) )
X        return 1; /* something bad happened... */
X
X    else return 0; /* This went OK... */
X
X} /* end of getfileblock() */
X
Xint sendfileblock(FILE *fp, unsigned char block[], const int blocksize)
X
X{    size_t i;
X
X    i = fwrite(block, 1, blocksize, fp);
X
X    if ( (i != blocksize) || ferror(fp) || feof(fp) )
X        return 1; /* there was a file error, so tell it... */
X
X    else return 0; /* a spotless finish.. */
X
X} /* end of sendfileblock() */
SHAR_EOF
fi # end of overwriting check
if test -f 'macbin.c'
then
    echo shar: will not over-write existing file "'macbin.c'"
else
sed 's/^X//'  >'macbin.c' <<'SHAR_EOF'
X/* macbin.c - Part of the unsea program.
X *   Copyright 1992 by David W. Rankin, Jr.
X *
X * See "unsea.txt" for full copyright information applying
X * to all text in this package.
X *
X *
X * macbin.c holds the unsea_mb() and associated routines. */
X
X #include "unsea.h"
X
Xint unsea_mb(char *oldfilename, char *newfilename)
X{
X    /* start of declared variables */
X
X    extern struct starting_flags stflags;
X
X    FILE *oldfilep; /* the original SEA MacBinary file */
X
X    FILE *newfilep; /* the new non-SEA MacBinary file */
X
X    unsigned long int i, /* general counter */
X
X        datablock,
X            /* holds the number of blocks in the data fork of the sea */
X
X        resblock;
X            /* same as datablock, except for the resource fork */
X
X    unsigned char fileblock[128];  /* storage area for blocks in the MacBinary file */
X
X    unsigned char *kfileblock; /* This pointer is for kblock transmission, if needed. */
X
X    int j, kblocks;      /* other counters */
X
X    /* start of code */
X
X    /* Let's see if the file even exists */
X    if ( (oldfilep=fopen(oldfilename,"rb") ) == NULL)
X        {
X         fprintf(stderr, "Cannot open %s to convert.\n", oldfilename);
X
X         return 1; /* Standard error return */
X        }
X
X    /* Can I read the file?? */
X    if (getfileblock(oldfilep,fileblock,128) ) /* getfileblock()
X                                              returns 1 as an error */
X        { ERROR("Unable to read %s.\n", oldfilename);
X
X          return 1;
X        }
X
X    /* Is it a SEA, and if so what kind? Let's check. */
X    if ((!check_mb_sea(fileblock))||(!stflags.sea_mode))
X        /* if check_mb_sea or sea_mode == 0, then the file is not
X         * an mb_sea.*/
X
X        { ERROR("%s is not a valid file for unsea.\n", oldfilename);
X
X          return 1;  /* spit it back */
X
X        }
X
X    /* Get a new filename for the file if one was not provided */
X
X    if (!strlen(newfilename))
X
X        convert_file_name(oldfilename, newfilename, TRUE);
X            /* The TRUE says that a "new_" prefix is to be used
X             * if necessary */
X
X    /* Can we open the new file?? If there is one there by the
X     * same name, the answer is no, unless option 'o' has
X     * been selected. In that case, it is yes, no matter what.*/
X
X    if(!(stflags.overwrite)&&((newfilep=fopen(newfilename,"r"))!=NULL))
X
X        { ERROR3("New file %s for converting %s already exists.\n", newfilename, oldfilename);
X
X          return 1;
X        }
X
X    /* Now let's see if the new file can be created... */
X    if ( (newfilep=fopen(newfilename,"wb") ) == NULL) /* UNSEA can't open the output file */
X
X        { printf("File error opening file %s for converting %s.\n", newfilename, oldfilename);
X
X          fclose(oldfilep);
X
X          return 1;
X        }
X    /* how long are the two forks of the Mac SEA file?? Note that
X     * getforksize() produces a figure in x bytes, while getblocksize()
X     * produces the number of 128 byte blocks in said number. */
X
X    datablock=getblocksize(getforksize(&fileblock[83]));
X
X    resblock=getblocksize(getforksize(&fileblock[87]));
X
X    /* Let's now let the user know about what this SEA is like,
X     * unless he already told us not to, via the b option. */
X    if(!stflags.less_talk)
X        {
X
X        printf("Opening %s for MacBinary conversion.\n\t SEA type:",oldfilename);
X
X        switch (stflags.sea_mode){
X
X            case 1:
X                printf("Compact Pro. \n");
X                break;
X
X            case 3:
X                printf("StuffIt Deluxe/Lite\n");
X                break;
X            }
X        printf("\t Output file: %s \n\t\
X Output file size (in bytes): %ld \n",newfilename,((datablock+1)*128));
X
X        }
X    /* Let's produce a block header for "newfilename" */
X    convert_mb_header(fileblock);
X
X    /* now, push the converted header into the new file, dealing
X       gracefully (at least somewhat gracefully...) with any
X       file errors. */
X    if (sendfileblock(newfilep,fileblock,128) )
X        {
X         ERROR3("File error accessing file %s for converting %s.\n", newfilename, oldfilename);
X
X         DELETE_FILE(newfilename);
X             /* Let's clean up the newly-generated file, as well. */
X         return 1;
X        }
X
X    /* Send the data block through unmolested, if it exists at all. */
X    if (datablock)
X        {
X
X        if(((datablock/8)>2)&&((kfileblock=calloc(1024,1))!=NULL))
X            { /* Basically, is the "fast" method worth the effort, and if
X               * so, can we get space for it?? */
X
X            kblocks = (datablock / 8);
X
X            for(i=1;i<= kblocks;i++)
X                {
X                if((getfileblock(oldfilep,kfileblock,1024))||(sendfileblock(newfilep,kfileblock,1024)))
X                    {
X                     ERROR3("File error during conversion of %s into %s.\n", oldfilename,newfilename);
X
X                     DELETE_FILE(newfilename);
X                     /* Let's clean up the newly-generated file, as well. */
X                      return 1;
X                    }
X                datablock -= 8;
X                }
X
X            free(kfileblock);
X            }/* There, the "big" parts are out of the way... */
X
X
X/* Now, let's get the leftovers... */
X        for(i=1;i<=datablock;i++)
X        {
X            if((getfileblock(oldfilep,fileblock,128))||(sendfileblock(newfilep,fileblock,128)))
X                {
X                 ERROR3("File error during conversion of %s into %s.\n", oldfilename,newfilename);
X
X                 DELETE_FILE(newfilename);
X                     /* Let's clean up the newly-generated file, as well. */
X                     return 1;
X                 }
X
X        }
X
X    } /* End of datablock sending */
X
X    /* Now that we have sent the data block, we can trash the old res fork */
X    if(((resblock/8)>2)&&((kfileblock=calloc(1024,1))!=NULL))
X            { /* Again, is the "fast" method worth the effort, and if
X               * so, can we get space for it?? */
X
X            kblocks = (resblock / 8);
X
X            for(i=1;i<= kblocks;i++)
X                {
X                if(getfileblock(oldfilep,kfileblock,1024))
X                    {
X                     ERROR3("File error during conversion of %s into %s.\n", oldfilename,newfilename);
X
X                     DELETE_FILE(newfilename);
X                     /* Let's clean up the newly-generated file, as well. */
X                      return 1;
X                    }
X                resblock -= 8;
X                }
X
X            free(kfileblock);
X            }/* There, the "big" parts are out of the way... */
X    for(i=1;i<=resblock;i++)
X        {
X        /* Again, let's check for errors (my, aren't we being paranoid
X         * about errors.. ;) */
X        if (getfileblock(oldfilep,fileblock,128) )
X            {
X             ERROR3("File error during conversion of %s into %s.\n", oldfilename,newfilename);
X
X             DELETE_FILE(newfilename);
X                 /* Let's clean up the newly-generated file, as well. */
X             return 1;
X             }
X        }
X
X    /* Send the rest of oldfile over, if any. (for compatability with
X     * standard, which allows Info block after the two forks.) */
X
X    while ( (j=fgetc(oldfilep) ) != EOF)
X        {
X          fputc(j,newfilep);
X        }
X
X    ERROR3("%s successfully converted to %s.\n\n", oldfilename, newfilename);
X
X    return 0; /* a job well done :) */
X
X}  /* end of unsea_mb() */
X
Xint check_mb_sea(unsigned char block[])
X{
X    extern struct starting_flags stflags;
X
X    int i;   /* counter, both general and specific */
X
X    char restype[5]; /* 4 byte length, for file type and creator */
X
X    int j;
X
X    stflags.sea_mode = 0;
X
X    if (block[0] || block[74] || block[82])
X        return 0;  /* If any of these are != 0, this is NOT a MB file */
X
X    /* From this point on, cmb() should return 1, to indicate that this
X     * is a MB file, simply not a MB SEA*/
X
X    for(i=0;i<4;i++)
X        restype[i]=block[65+i];
X
X    restype[4] = 0;
X
X    if (strcmp(restype, "APPL")) /* This is TRUE if restype != "APPL" */
X        return 1;  /* Can add "appe" here if needed later... */
X
X    /* Time to do the same thing with the creator type */
X
X    for(i=0; i<4; i++)
X        restype[i]=block[69+i];
X
X    if ((!stflags.ignore_cpt_seas)&&(!strcmp(restype, "EXTR")))
X        /* If we can even read CompactPro SEAs, is it one? */
X        {
X        stflags.sea_mode = 1;
X
X        return 1; /* it is */}
X
X    else if ((!stflags.ignore_sitd_seas)&&(!strcmp(restype, "aust")))
X        /* Can we read StuffIt SEAs, and if so is this file one? */
X        {
X        stflags.sea_mode = 3;
X
X        return 1; /* Yep. :) */}
X
X    return 1;
X    /* None of these is true, so instead, let's just return
X     * that it's a MacBinary file. */
X
X} /* end of check_mb_sea() */
SHAR_EOF
fi # end of overwriting check
if test -f 'unsea.c'
then
    echo shar: will not over-write existing file "'unsea.c'"
else
sed 's/^X//'  >'unsea.c' <<'SHAR_EOF'
X/* unsea.c - Part of the unsea program.
X *   Copyright 1992 by David W. Rankin, Jr.
X *
X * See "unsea.txt" for full copyright information applying
X * to all text in this package.
X *
X *
X * This file holds main(), and other main parts of unsea. */
X
X/* include statements */
X
X#include "unsea.h"
X
X/* Beginning of code */
X
Xstruct starting_flags stflags;
X
Xvoid main(int argc, char *argv[])
X{
X    extern struct starting_flags stflags;
X
X    char newfilename[FILENAME_MAX+1];/* the place for the file to be created */
X
X    int i, j, /* generic counters */
X
X        arg_per_file; /* see its use */
X
X    /* start of code */
X
X    strcpy(newfilename,""); /* This initializes this string */
X
X/* This is for use on THINK_C compilers only. */
X#ifdef THINK_C
X    argc=ccommand(&argv);
X#endif /*THINK_C*/
X
X    startupmesg();
X
X    if (argc==1)
X        {
X        help();  /* tell basics, then quit */
X
X        exit(EXIT_SUCCESS); }
X
X    /* implied "else if (argc>=2)" */
X
X
X     for(i=1;i<argc;i++)
X         { /* Is argv[i] "--"? If so, quit looking for options
X            * completely. */
X         if(!strncmp(argv[i],"--",2))
X             {
X             i++;
X
X             break;  }
X             /* If argv[i] doesn't have '-' at the beginning, quit looking
X              * as well, but make no incrementation */
X
X         if(argv[i][0] != '-')
X             break;
X
X        if(check_startup_flags(argv[i]))
X            {
X            fprintf(stderr,"\
XFatal error within option flags. Unable to proceed with conversion \n");
X
X             help();
X
X             exit(EXIT_FAILURE);
X
X             }
X         } /* end of for() loop */
X    if (stflags.name_given && ((argc-i) % 2) )
X            /* If there are supposed to be an even # of arguments,
X             * but aren't, then spit it back... */
X        { fprintf(stderr, "Improper number of arguments for -n flag.\n");
X
X           exit(EXIT_FAILURE);
X         }
X
X    if(i==argc)
X        { /* this sees if no files were selected for conversion.
X           * If so, give help and error out. */
X        help();
X
X        exit(EXIT_FAILURE);
X        }
X
X    arg_per_file = (stflags.name_given) ? 2 : 1;
X
X    while(i<argc)
X        {
X        if(stflags.name_given)
X            strcpy(newfilename, argv[i+1]);
X
X        unsea_mb(argv[i], newfilename);
X
X        strcpy(newfilename, "");
X
X        i += arg_per_file;
X
X        }
X
X}  /* end of main() */
X
Xvoid restypecopy(unsigned char block[], const int startint, char s[])
X
X{    int i;
X
X    for (i=0;i<4;i++)
X        block[startint+i] = s[i];
X
X} /* end of restypecopy() */
X
Xint check_startup_flags(char *string)
X{
X    extern struct starting_flags stflags;
X    int i, len,bad_flag=FALSE;
X
X    len = strlen(string);
X
X    for(i=0; i<len; i++)
X        {
X        switch (string[i]) {
X
X            case 'B': /* 'b'rief descriptions mode. */
X            case 'b':
X                stflags.there = TRUE;
X
X                stflags.less_talk = TRUE;
X                    /* less talk is what happens... */
X                break;
X
X
X
X        /* This case is put in for future versions of unsea, but is
X         * dunsel for now. */
X            case 'D': /* ignore 'D'iskDoubler SEAs */
X            case 'd':
X                stflags.there = TRUE;
X
X                stflags.ignore_dd_seas = TRUE;
X
X                break;
X
X            case 'C': /*ignore 'C'ompact Pro SEAs */
X            case 'c':
X                stflags.there = TRUE;
X
X                stflags.ignore_cpt_seas = TRUE;
X
X                break;
X
X            case 'S': /* Ignore 'S'tuffIt SEAs /*
X            case 's':
X                stflags.there = TRUE;
X
X                stflags.ignore_sitd_seas = TRUE;
X
X                break;
X
X            case 'N': /* new 'n'ame given */
X            case 'n':
X                stflags.there = TRUE;
X
X                stflags.name_given = TRUE;
X
X                break;
X
X            case 'O': /* 'O'verwrite "newfilename" */
X            case 'o':
X                stflags.there = TRUE;
X
X                stflags.overwrite = TRUE;
X                    /* Overwrite any file in the way of the new file */
X                break;
X
X            case '-': /* Ignore '-', as per UNIX custom */
X                break;
X
X            default:  /* when a bad flag is found, let main() know*/
X                bad_flag=TRUE;
X                break;
X            }
X
X        }
X        return bad_flag;
X} /* End of check_startup_flags() */
SHAR_EOF
fi # end of overwriting check
if test -f 'unsea.h'
then
    echo shar: will not over-write existing file "'unsea.h'"
else
sed 's/^X//'  >'unsea.h' <<'SHAR_EOF'
X/* unsea.h - Part of the unsea program.
X *   Copyright 1992 by David W. Rankin, Jr.
X *
X * See "unsea.txt" for full copyright information applying
X * to all text in this package.
X *
X *
X * Header file for the rest of unsea. */
X
X#include <stdio.h>
X
X#include <stdlib.h>
X
X#include <stddef.h>
X
X#include <string.h>
X
X/* USER DEFINABLE FLAGS
X * The flags in this area can be changed by the user to customize
X * the way unsea works. */
X
X#undef UNIX_DELETE
X    /* If this is defined, unlink() is used instead of remove().
X     * For compiler libraries that aren't 100% ANSI compatable */
X
X/* End of user definable flags
X * You SHOULD NOT change any of the statements below this line */
X
X/* required define statements */
X#undef TRUE
X#define TRUE    1
X
X#undef FALSE
X#define FALSE    0
X
X/* The next 2 defines are for use with exit(), to show explicitely
X * whether the exit was successful or not. These should be defined
X * in the C libraries, but I have grown not to trust the libraries
X * a lot in things like this... */
X
X#ifndef EXIT_FAILURE
X#    define EXIT_FAILURE 1
X#endif
X
X#ifndef EXIT_SUCCESS
X#    define EXIT_SUCCESS 0
X#endif
X
X#ifndef FILENAME_MAX
X#    define FILENAME_MAX 63
X/* This is for the drain-bramaged compilers that refuse to
X * define all the constants. */
X#endif /* FILENAME_MAX */
X
X#ifdef THINK_C /* This is true for THINK C compilers, usually */
X#    define MACINTOSH
X#    include <console.h>
X#endif  /* THINK_C */
X
X#define ERROR(ARGUMENT1, ARGUMENT2) fprintf(stderr,ARGUMENT1, ARGUMENT2);\
Xfclose(oldfilep)
X#define ERROR3(ARGUMENT1, ARGUMENT2,ARGUMENT3) fprintf(stderr,ARGUMENT1,\
XARGUMENT2,ARGUMENT3);fclose(oldfilep);fclose(newfilep)
X
X    /* WARNING: This routine is unsea_mb specific!!! *
X       ERROR() allows the program to neatly deal with errors, by simply *
X       stating it in the code, and then the preprocessor comes along later *
X       and adds the rest. */
X
X#ifdef UNIX_DELETE
X#    define DELETE_FILE(arg) unlink(arg)
X/* Use the UNIX standard delete file routine */
X#else
X#    define DELETE_FILE(arg) remove(arg)
X/* Use the ANSI C standard delete file routine. The recommended
X * macro */
X#endif /*UNIX_DELETE */
X
X/* end of definitions */
X
X/* start of struct definitions */
X
Xstruct starting_flags
X        {
X        char there,
X                /* This is TRUE if there are flags in the first place */
X
X            name_given,
X                /* This flag is true if each file has a "child" file name */
X
X            ignore_sitd_seas,
X                /* Used to record status of StuffIt SEAs, as decided on
X                 * the command line. */
X
X            ignore_cpt_seas,
X                /* Same as ignore_sitd_seas, except for Compact Pro SEAs. */
X
X            ignore_dd_seas,
X                /* At this time, unsea will not convert DiskDoubler SEAs. When
X                 * it does, this will be the boolean for allowing or preventing
X                 * conversion. */
X
X            less_talk,
X                /* when the 'b'rief mode is selected, unsea will refrain
X                 * from printing out a detailed analysis of the SEA being
X                 * converted. */
X
X            overwrite;
X                /* When selected, unsea will overwrite when it finds
X                 * a file with the same name as the new file to be
X                 * generated. */
X
X        int sea_mode;
X            /* This int will hold the type of SEA that the file is. */
X
X        }; /* end of struct starting_flags */
X
X/*  function declarations */
X
Xvoid main(int argc, char *argv[]);
X
Xvoid startupmesg(void);
X
Xvoid help(void);
X
Xvoid restypecopy(unsigned char block[], const int startint, char s[]);
X
Xint unsea_mb(char *oldfilename, char *newfilename);
X
Xint getfileblock(FILE *fp, unsigned char block[], const int blocksize);
X
Xint convert_file_name(char *oldfilename, char *newfilename, const int convert_all);
X
Xint check_mb_sea(unsigned char block[]);
X
Xvoid convert_mb_header(unsigned char block[]);
X
Xint sendfileblock(FILE *fp, unsigned char block[], const int blocksize);
X
Xunsigned long int getforksize(unsigned char block[]);
X
Xunsigned long int getblocksize(unsigned long int bytes);
X
Xunsigned short updatecrc(unsigned char c, unsigned short crc);
X
Xint check_startup_flags(char *argv);
X
X/* end of function prototypes */
SHAR_EOF
fi # end of overwriting check
if test -f 'unsea.testers'
then
    echo shar: will not over-write existing file "'unsea.testers'"
else
sed 's/^X//'  >'unsea.testers' <<'SHAR_EOF'
Xunsea.testers - Part of the unsea program.
X  Copyright 1992 by David W. Rankin, Jr.
X
X    I again want to thank everyone on this list for beta testing unsea,
Xbeta testing my programs is not at all an easy task. :)
X
XBeta testers for unsea(by version)
X<1.0
XAlan D. Danziger
XKelvin Edmison
XAlan R. Fry
XJoey Gibson
XMarco Gonzalez of Aladdin Systems, Inc.
XKen Hancock
XBryan M. Kearney
XZeke Koch
XAnand C. Patel
XGreg Rabanes
XLeonard Rosenthol of Aladdin Systems, Inc.
XEdward John Sabol
XChris Schwenda
XJustin Sullivan
XMatthias Weismann
XKurt D. Whitmore
SHAR_EOF
fi # end of overwriting check
if test -f 'unsea.txt'
then
    echo shar: will not over-write existing file "'unsea.txt'"
else
sed 's/^X//'  >'unsea.txt' <<'SHAR_EOF'
X"Unsea 1.0 Release Version"
XAll parts of this package
X     Copyright 1992 David W. Rankin, Jr.
X
XDESCRIPTION:
X     Unsea is a "charityware" (see "CHARITYWARE" below) routine for removing
Xthe self-expanding code from MacBinary coded self-expanding archives ("SEAs").
XIt works with most SEAs created by Compact Pro(TM) 1.33 and compatable versions
Xand with StuffIt Classic(TM) 1.6, StuffIt Deluxe(TM) 1.0-3.0 and StuffIt
XLite(TM) 3.0 SEAs. (see "Non-Compatable SEAs" below.)
X
X     WARNING: This program uses techniques which remove all code from the
Xresource fork of the file converted. Therefore, you should not attempt
Xto use it on any file that requires data to remain in the resource fork.
XThis is especially important with StuffIt(TM) SEAs with encrypted files. (See
Xbelow.)
X
XLEGAL STUFF:
X     Unsea is NOT in the public domain; the copyright remains the property of
XDavid W. Rankin, Jr. (hereafter "I" or "me"). I hereby grant permission to
Xany group wishing to distribute the unsea package in a completly unmodified
Xform for no cost (not including on-line services that only charge per hour
Xconnection charges). Any group wishing to distribute unsea while charging any
Xfee not covered under the above exceptions for said distribution, especially
X"media" or "handling" charges, must obtain written permission from me before
Xso distributing this package.
X    This package contains material covered by a registered Copyright on
X"Unsea 1.0", as well as all copyrights on this version and copyrights on
Xany earlier versions of unsea.
X    I have made every effort to ensure that this package works and is safe
Xto use under normal operating conditions. However, I cannot and do not warrant
Xthis product to be free from defects, or that it will operate as advertised.
XUse at your own risk.
X    Any use of the names of any individuals, groups or companies within this
Xtext is for informational purposes only, and does not represent an endorsement
Xof unsea by any party so mentioned.
X    All trademarks presented are the property of their respective owners.
X
XCHARITYWARE:
X     Unsea is "charityware." If you like and use unsea, I ask that you make a
Xcontribution of $15 US or more to the Christian Appalachian Project (CAP) in
Xlieu of any payments to me. CAP is an inter-denominational Christian group
Xdedicated to helping the people of Appalachia help themselves out of the
Xcycle of poverty that has such a strong grip on that region.
X     CAP's address is:
X
X    Christian Appalachian Project
X    322 Crab Orchard Road
X    Lancaster, KY 40446
X    US Phone Number: [phone]
X
X     Whether or not you chose to donate to CAP, I also ask that you contact me,
Xso that I may add your name to my mailing lists for unsea. I will try to
Xcontact unsea users about new versions, bugs, etc. directly, in addition to
Xposting to Usenet. My addresses are at the end of this file.
X
XCOMPILING UNSEA:
X     Unsea uses parts of the ANSI standard that are not covered under the
Xoriginal Kernighan and Ritchie (K&R) standard of C. Therefore, you will have
Xto compile this program with an ANSI compliant compiler. If your system's "cc"
Xcompiler is not ANSI C compliant and you are on a UNIX machine, I suggest that
Xyou obtain GNU's C compiler, gcc.
X     If you are on a UNIX machine, you may simply use the command "make unsea"
Xto create the unsea program. (See the instructions inside "Makefile" for
Xmore information in that regard.) If you do not have the "make" program, then
Xyou will need to compile each .c file in this package into a program named
X"unsea", following the instructions that come with your compiler.
X     One problem that has come to my attention already is that some compiler
Xlibraries do not support the remove() function, which deletes files. If you
Xencounter an error mentioning _remove failing to link, then this is the
Xcase. To correct this, you can change "#undef UNIX_DELETE" in unsea.h to
X"#define UNIX_DELETE." This changes the remove() command to unlink(), a library
Xfunction common to UNIX compilers and often in other libraries, but not in the
XANSI C standard libraries.
X
XUSE OF UNSEA:
X   Syntax for calling unsea:
X   unsea [-bcnos] oldfile1.sea.bin [newfile1.name.bin] [oldfile2.sea.bin ... ]
X
XCommand Line Syntax:
X     Starting with the second word of the command line (unsea assumes the first
Xis its own name), unsea searches the command line for option flags starting
Xwith '-', up to either a file name not starting with '-', or the string "--"
X(for when you have a file name with '-' in it).
X     If unsea encounters an option flag it does not know [see below for a list
Xof legitimate option flags], it will report an error to the user and abort.
X     Once unsea has reached the end of the flags, it begins converting each
Xfile name given. If the n option has been selected (see below), it processes
Xthe filenames in the command line as pairs, with the first of the pair as the
Xname of the SEA file and the latter as the name of the unSEAed output file.
XIt continues processing these names until the end of the command line is
Xreached. Therefore, unsea is capable of converting multiple files during one
Xrun.
X
X     Option Flags:
X     b:   Normally unsea gives detailed information about a SEA as it is
X          being converted. However, this option places unsea into its
X          "brief descriptions" mode, in which only a small amount of
X          information is printed to the screen.
X
X     c:   This flag will cause any Compact Pro SEAs to be ignored by unsea
X          during its conversion of the named files. It is good for aliases
X          where you have a reason to not unSEA a Compact Pro file. The
X          default is to unSEA Compact Pro SEAs
X
X     n:   When this option is selected, unsea uses the string coming after
X          the SEA file name as the output for the unSEAed file. If the file
X          name already exists, it will NOT be overwritten, unless the "o"
X          option is selected. When this option is not selected, unsea
X          creates a name for the new file using an internal name generator.
X
X     o:   unsea will overwrite any file named the same as the new file it
X          will generate (either through the n option or its internal name
X          generator.) This option is not recommended except for use with
X          the n option, since the internal name generator might produce a
X          name that you did not anticipate. Unsea will not overwrite a
X          file by default.
X
X     s:   This option causes unsea to ignore StuffIt Deluxe SEAs that it
X          encounters. This option too is good for an alias to unsea. By
X          default, unsea converts StuffIt Deluxe SEAs.
X
X   Note on Options:
X       While unsea does not presently use option flag 'd', it also will not
X     report its use as an error. The code recognizing d as the option flag for
X     surpressing unseaing of DiskDoubler SEAs was added when I added other
X     code to unsea, even though DiskDoubler SEAs are not yet supported.
X
XNON-COMPATABLE SEAs
X     There are several types of self-expanding archives that unsea is presently
Xincapable of converting. The main one among these is SEAs generated by
XDiskDoubler(TM). I will attempt to correct this in the future, but, as I do not
Xown DiskDoubler, this will take time. (Anyone want to buy me a copy of
XDiskDoubler so I can try it?? ;).
X     On the other hand, unsea does not and will not support SEAs made by more
Xesoteric compressors, such as More Disk Space(TM). I am a college student with
Xa GPA that has to stay up, so I only have so much spare time.
X     Also, encrypted StuffIt SEAs use information in the resource fork to
Xdefine the encryption, so when unsea removes the resource fork, it corrupts the
Xencryption in the process. Unsea is not capable of detecting such encryption,
Xso it will blindly proceed to corrupt the archive. There is no practical way
Xthat I know of to fix this either, since even a checker would have to do
Xa lot of manipulations of the resource fork, something rather hard for
XMacBinary but almost impossible for BinHex.
X
XACKNOWLEDGEMENTS:
X     There are several people I want to thank for their help with unsea. First,
XMarco Gonzalez of Aladdin Systems, Inc. for the information about encrypted
XStuffIt SEAs, Bill Goodman for pointing out that the BNDL bit had to be
Xcleared and confirming my data on Compact Pro SEAs, Ken Hancock, for warning
Xme about funny things inside DiskDoubler SEAs and for help straightening out
Xmy #define statements, Justin Sullivan, for the original push to start unsea
Xand beta testing above and beyond the call of duty, and Greg Rabanes for
Xalpha testing and encouragement.
X     Next, the beta testers who took some of their valuable time to make unsea
Xbetter. It comforts a programmer to know there are always people out there
Xwilling to show you all of your stupid mistakes. ;) Seriously, I appreciate
Xthe help of all the testers. [A full list of all of unsea's beta testers is
Xin the file "unsea.testers".]
X     Finally, I want to thank the Lord for giving me this knack called
Xprogramming.
X     If I left anyone out, feel free to complain to me, and I'll put in a
Xspecial mention in the next version.
X
XCONTACTING THE AUTHOR:
X     The best way to contact me is through Electronic Mail, since I check it
Xoften. Please use the backup addresses only if you cannot get to reach the
Xprimary address for each net mentioned. Here are the addresses:
X     INTERNET: rankin=[e-mail]
X               Backup: [e-mail], [e-mail]
X     BITNET: rankin=[e-mail]
X               Backup: [e-mail], [e-mail]
X     UUCP: rankin=[e-mail] or {uunet, gatech}!ukma!rankin=unsea
X               Backup: uunet!mik.uky.edu!rankin, uunet!ukpr.uky.edu!djrank00
X     US Postal Service:
X      As an absolute last resort, you may write to:
X           David W. Rankin, Jr.
X           Boyd Hall
X           University of Kentucky
X           Lexington, KY 40526-0008
X     However, please consider that this is not a complete address, so the post
Xoffice will have to process it. That means it will take a while to get to me.
XI hope to have a permanent mailing address by the time I have finished unsea
X1.1, at which time I will put it in this document.
X
XCOMING ATTRACTIONS
X     I am presently working on unsea 1.1, which will have any necessary bug
Xfixes for 1.0 (hopefully none :) and support for BinHex archives. Also, I
Xwill make unsea's CRC generator work right, so that it makes correct
XMacBinary 2 files (it will now only make MacBinary 1 files.) DiskDoubler
Xsupport is likely to take a while longer, especially since I have other irons
XREFERENCES:
X
XMacBinary Standard, Dennis F. Brothers. This is the original proposal outlining
X     the MacBinary format, and was the working document created by the original
X     MacBinary Working Group.
X
X"MacBinary II Standard", MacBinary II Conference. This document reflects the
X     concensus of the MacBinary II Conference, as to extending the MacBinary
X     standard to cover changes in the Macintosh Finder data and to add CRC
X     protection to the header of the file.
X
Xmcvert 1.65 and mcvert 1.70, Doug Moore et al. UNIX program that converts
X     MacBinary to BinHex and vice versa, in addition to UnPacking PackIt files
X     and neato conversions of text files. A prime example of durable code at
X     it's best. (Better than mine, that's for sure. :)
X
XBinHex 4.0 Definition, Peter N. Lewis. This document was created by Mr. Lewis
X     during the creation of DeHQX, and is a clear definition of the BinHex 4.0
X     standard, as far as I can tell. Unsea will be 100% compatable with the
X     BinHex format as described in this document and mcvert.
X
XThe C Programming Language, Second Edition, Kernighan and Ritchie. This is
X     the main code reference that I have used for unsea, especially for being
X     ANSI C compliant. I do reccomend this book.
X
XTHINK C(tm) 5.0, Symantec. During the development and early beta stages, all
X     of my programming for unsea was on THINK C. Also, I used the Standard
X     Libraries Reference included with the compiler as an additional reference
X     for the ANSI C library functions.
SHAR_EOF
fi # end of overwriting check
if test -f 'version.c'
then
    echo shar: will not over-write existing file "'version.c'"
else
sed 's/^X//'  >'version.c' <<'SHAR_EOF'
X/* version.c - Part of the unsea program.
X *   Copyright 1992 by David W. Rankin, Jr.
X *
X * See "unsea.txt" for full copyright information applying
X * to all text in this package.
X *
X *
X * version.c holds the version-dependant info as well as the
X * in-program help. */
X
X#include "unsea.h"
X
X
X#define VERSION "Unsea 1.0 Release Version"
X
X
X/* HELP CODE!!! */
X
Xvoid startupmesg(void)
X{
X    printf(VERSION "\n\
XCopyright 1992 David W. Rankin, Jr.\n\n\
X  WARNING: unsea will corrupt encrypted StuffIt SEAs. Do not use\n\
Xunsea to convert these files. \n\n");
X
X}
X
Xvoid help(void)
X{
X    /* here I'll put the ever-helpful tips to those who need help */
X
X    printf("Syntax for calling unsea: \n\
Xunsea [-bcnos] [--] archive1.name [new.archive1.name] [archive2.name] ... \n\
XOptions:[None of these are defaults]\n\
X   b: This option places unsea in \"brief descriptions\" mode, surpressing\n\
X      the verbose descriptions of the SEA being converted that unsea\n\
X      normally gives.\n\
X   c: When selected, this flag surpresses conversion of Compact Pro files.\n\
X      By default, Compact Pro files are converted.\n\
X   n: For every original file, a file name is given for the\n\
X      output file. If this isn't selected, unsea generates\n\
X      a name using its internal naming algorithms.\n");   printf("\
X   o: Overwrite any file with the same name as the converted file.\n\
X      If not selected, unsea will not overwrite files.\n\
X   s: Surpress conversion of StuffIt Deluxe SEAs. By default, StuffIt SEAs\n\
X      are converted.\n\
XAfter the options, list the files you wish to convert, along\n\
Xwith the converted file's name, if using the -n option. \n");
X}
SHAR_EOF
fi # end of overwriting check
:    End of shell archive
exit 0