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/*
* $Header: arc.c,v 1.12 88/07/31 18:39:50 hyc Exp $
*/
/* ARC - Archive utility
Version 5.21, created on 04/22/87 at 15:05:21
(C) COPYRIGHT 1985-87 by System Enhancement Associates; ALL RIGHTS RESERVED
By: Thom Henderson
Description:
This program is a general archive utility, and is used to maintain
an archive of files. An "archive" is a single file that combines
many files, reducing storage space and allowing multiple files to
be handled as one.
Instructions:
Run this program with no arguments for complete instructions.
Programming notes:
ARC Version 2 differs from version 1 in that archive entries
are automatically compressed when they are added to the archive,
making a separate compression step unecessary. The nature of the
compression is indicated by the header version number placed in
each archive entry, as follows:
1 = Old style, no compression
2 = New style, no compression
3 = Compression of repeated characters only
4 = Compression of repeated characters plus Huffman SQueezing
5 = Lempel-Zev packing of repeated strings (old style)
6 = Lempel-Zev packing of repeated strings (new style)
7 = Lempel-Zev Williams packing with improved hash function
8 = Dynamic Lempel-Zev packing with adaptive reset
9 = Dynamic Lempel-Zev packing, larger hash table
Type 5, Lempel-Zev packing, was added as of version 4.0
Type 6 is Lempel-Zev packing where runs of repeated characters
have been collapsed, and was added as of version 4.1
Type 7 is a variation of Lempel-Zev using a different hash
function which yields speed improvements of 20-25%, and was
added as of version 4.6
Type 8 is a different implementation of Lempel-Zev, using a
variable code size and an adaptive block reset, and was added
as of version 5.0
Type 9 is a slight modification of type 8, first used by Phil
Katz in his PKARC utilites. The primary difference is the use
of a hash table twice as large as for type 8, and that this
algorithm called Squashing, doesn't perform run-length encoding
on the input data.
Verion 4.3 introduced a temporary file for holding the result
of the first crunch pass, thus speeding up crunching.
Version 4.4 introduced the ARCTEMP environment string, so that
the temporary crunch file may be placed on a ramdisk. Also
added was the distinction bewteen Adding a file in all cases,
and Updating a file only if the disk file is newer than the
corresponding archive entry.
The compression method to use is determined when the file is
added, based on whichever method yields the smallest result.
Language:
Computer Innovations Optimizing C86
*/
#include <stdio.h>
#include "arc.h"
#if UNIX
#include <sys/types.h>
#include <sys/stat.h>
#endif
int strlen();
void addarc(), delarc(), extarc(), lstarc(), tstarc(), cvtarc(), runarc();
void arc_abort();
static void expandlst();
#if MTS
void etoa();
#endif
#if GEMDOS
long _stksize = 65536L;
#endif
char *strcpy(), *strcat();
char *makefnam(); /* filename fixup routine */
static char **lst; /* files list */
static int lnum; /* length of files list */
main(num, arg) /* system entry point */
int num; /* number of arguments */
char *arg[]; /* pointers to arguments */
{
char opt = 0;/* selected action */
char *a; /* option pointer */
void upper();/* case conversion routine */
char *index();/* string index utility */
char *envfind(); /* environment searcher */
int n; /* index */
char *arctemp2, *calloc(), *mktemp();
#if GEMDOS
void exitpause();
int append;
#endif
#if MTS
fortran void guinfo();
char gotinf[4];
#endif
#if UNIX
struct stat sbuf;
#endif
if (num < 3) {
printf("ARC - Archive utility, Version 5.21, created on 04/22/87 at 15:05:21\n");
/* printf("(C) COPYRIGHT 1985,86,87 by System Enhancement Associates;");
printf(" ALL RIGHTS RESERVED\n\n");
printf("Please refer all inquiries to:\n\n");
printf(" System Enhancement Associates\n");
printf(" 21 New Street, Wayne NJ 07470\n\n");
printf("You may copy and distribute this program freely,");
printf(" provided that:\n");
printf(" 1) No fee is charged for such copying and");
printf(" distribution, and\n");
printf(" 2) It is distributed ONLY in its original,");
printf(" unmodified state.\n\n");
printf("If you like this program, and find it of use, then your");
printf(" contribution will\n");
printf("be appreciated. You may not use this product in a");
printf(" commercial environment\n");
printf("or a governmental organization without paying a license");
printf(" fee of $35. Site\n");
printf("licenses and commercial distribution licenses are");
printf(" available. A program\n");
printf("disk and printed documentation are available for $50.\n");
printf("\nIf you fail to abide by the terms of this license, ");
printf(" then your conscience\n");
printf("will haunt you for the rest of your life.\n\n"); */
#if MSDOS
printf("Usage: ARC {amufdxerplvtc}[bswnoq][g<password>]");
#endif
#if GEMDOS
printf("Usage: ARC {amufdxerplvtc}[bhswnoq][g<password>]");
#endif
#if UNIX
printf("Usage: arc {amufdxerplvtc}[biswnoq][g<password>]");
#endif
#if MTS
printf("Parameters: {amufdxeplvtc}[biswnoq][g<password>]");
#endif
printf(" <archive> [<filename> . . .]\n");
printf("Where: a = add files to archive\n");
printf(" m = move files to archive\n");
printf(" u = update files in archive\n");
printf(" f = freshen files in archive\n");
printf(" d = delete files from archive\n");
printf(" x,e = extract files from archive\n");
#if !MTS
printf(" r = run files from archive\n");
#endif
printf(" p = copy files from archive to");
printf(" standard output\n");
printf(" l = list files in archive\n");
printf(" v = verbose listing of files in archive\n");
printf(" t = test archive integrity\n");
printf(" c = convert entry to new packing method\n");
printf(" b = retain backup copy of archive\n");
#if GEMDOS
printf(" h = hold screen after finishing\n");
#endif
#if MTS
printf(" i = suppress ASCII/EBCDIC translation\n");
#endif
#if UNIX
printf(" i = suppress image mode (translate EOL)\n");
#endif
printf(" s = suppress compression (store only)\n");
printf(" w = suppress warning messages\n");
printf(" n = suppress notes and comments\n");
printf(" o = overwrite existing files when");
printf(" extracting\n");
printf(" q = squash instead of crunching\n");
printf(" g = Encrypt/decrypt archive entry\n");
printf("\nAdapted from MSDOS by Howard Chu\n");
/*
* printf("\nPlease refer to the program documentation for");
* printf(" complete instructions.\n");
*/
#if GEMDOS
exitpause();
#endif
return 1;
}
/* see where temp files go */
#if !MTS
arctemp = calloc(1, STRLEN);
if (!(arctemp2 = envfind("ARCTEMP")))
arctemp2 = envfind("TMPDIR");
if (arctemp2) {
strcpy(arctemp, arctemp2);
n = strlen(arctemp);
if (arctemp[n - 1] != CUTOFF)
arctemp[n] = CUTOFF;
}
#if UNIX
else strcpy(arctemp, "/tmp/");
#endif
#if !MSDOS
{
static char tempname[] = "AXXXXXX";
strcat(arctemp, mktemp(tempname));
}
#else
strcat(arctemp, "$ARCTEMP");
arctemp2 = NULL;
#endif
#else
guinfo("SHFSEP ", gotinf);
sepchr[0] = gotinf[0];
guinfo("SCRFCHAR", gotinf);
tmpchr[0] = gotinf[0];
arctemp = "-$$$";
arctemp[0] = tmpchr[0];
#endif
#if !UNIX
/* avoid any case problems with arguments */
for (n = 1; n < num; n++) /* for each argument */
upper(arg[n]); /* convert it to uppercase */
#else
/* avoid case problems with command options */
upper(arg[1]); /* convert to uppercase */
#endif
/* create archive names, supplying defaults */
#if UNIX
if (!stat(arg[2],&sbuf))
strcpy(arcname,arg[2]);
else
makefnam(arg[2],".arc",arcname);
#else
makefnam(arg[2], ".ARC", arcname);
#endif
/* makefnam(".$$$",arcname,newname); */
sprintf(newname, "%s.arc", arctemp);
makefnam(".BAK", arcname, bakname);
/* now scan the command and see what we are to do */
for (a = arg[1]; *a; a++) { /* scan the option flags */
#if !MTS
if (index("AMUFDXEPLVTCR", *a)) { /* if a known command */
#else
if (index("AMUFDXEPLVTC", *a)) {
#endif
if (opt)/* do we have one yet? */
arc_abort("Cannot mix %c and %c", opt, *a);
opt = *a; /* else remember it */
} else if (*a == 'B') /* retain backup copy */
keepbak = 1;
else if (*a == 'W') /* suppress warnings */
warn = 0;
#if !DOS
else if (*a == 'I') /* image mode, no ASCII/EBCDIC x-late */
image = !image;
#endif
#if GEMDOS
else if (*a == 'H') /* pause before exit */
hold = 1;
#endif
else if (*a == 'N') /* suppress notes and comments */
note = 0;
else if (*a == 'O') /* overwrite file on extract */
overlay = 1;
else if (*a == 'G') { /* garble */
password = a + 1;
while (*a)
a++;
a--;
#if MTS
etoa(password, strlen(password));
#endif
} else if (*a == 'S') /* storage kludge */
nocomp = 1;
else if (*a == 'K') /* special kludge */
kludge = 1;
else if (*a == 'Q') /* use squashing */
dosquash = 1;
else if (*a == '-' || *a == '/') /* UNIX and PC-DOS
* option markers */
;
else
arc_abort("%c is an unknown command", *a);
}
if (!opt)
arc_abort("I have nothing to do!");
/* get the files list set up */
lnum = num - 3; /* initial length of list */
lst = (char **) calloc((lnum==0) ? 1:lnum,
sizeof(char *)); /* initial list */
for (n = 3; n < num; n++)
lst[n - 3] = arg[n];
for (n = 0; n < lnum;) {/* expand indirect references */
if (*lst[n] == '@')
expandlst(n);
#if GEMDOS /* redirect stdout from the desktop...*/
else if (*lst[n] == '>') {
arctemp2 = (++lst[n]);
lst[n] = lst[lnum-1]; /* delete this entry */
lnum--;
if (arctemp2[0] == '>') {
append = 1;
arctemp2++;
}
else append = 0;
}
#endif
else
n++;
}
#if GEMDOS
if (arctemp2)
freopen(arctemp2,append ? "a" : "w",stdout);
#endif
/* act on whatever action command was given */
switch (opt) { /* action depends on command */
case 'A': /* Add */
case 'M': /* Move */
case 'U': /* Update */
case 'F': /* Freshen */
addarc(lnum, lst, (opt == 'M'), (opt == 'U'), (opt == 'F'));
break;
case 'D': /* Delete */
delarc(lnum, lst);
break;
case 'E': /* Extract */
case 'X': /* eXtract */
case 'P': /* Print */
extarc(lnum, lst, (opt == 'P'));
break;
case 'V': /* Verbose list */
bose = 1;
case 'L': /* List */
lstarc(lnum, lst);
break;
case 'T': /* Test */
tstarc();
break;
case 'C': /* Convert */
cvtarc(lnum, lst);
break;
#if !MTS
case 'R': /* Run */
runarc(lnum, lst);
break;
#endif
default:
arc_abort("I don't know how to do %c yet!", opt);
}
#if GEMDOS
if (hold)
exitpause();
#endif
return nerrs;
}
static void
expandlst(n) /* expand an indirect reference */
int n; /* number of entry to expand */
{
FILE *lf, *fopen(); /* list file, opener */
char *malloc(), *realloc(); /* memory managers */
char buf[100]; /* input buffer */
int x; /* index */
char *p = lst[n] + 1; /* filename pointer */
if (*p) { /* use name if one was given */
makefnam(p, ".CMD", buf);
if (!(lf = fopen(buf, "r")))
arc_abort("Cannot read list of files in %s", buf);
} else
lf = stdin; /* else use standard input */
for (x = n + 1; x < lnum; x++) /* drop reference from the list */
lst[x - 1] = lst[x];
lnum--;
while (fscanf(lf, "%99s", buf) > 0) { /* read in the list */
if (!(lst =(char **)realloc(lst, (lnum + 1) * sizeof(char *))))
arc_abort("too many file references");
lst[lnum] = malloc(strlen(buf) + 1);
strcpy(lst[lnum], buf); /* save the name */
lnum++;
}
if (lf != stdin) /* avoid closing standard input */
fclose(lf);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.