1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456
|
/*
* $Header: /cvsroot/arc/arc/arc.c,v 1.5 2005/10/09 01:38:22 highlandsun 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
#include <string.h>
#if BSD
#include <strings.h>
#endif
#if !__STDC__
char *calloc(), *malloc(), *realloc();
#endif
VOID addarc(), delarc(), extarc(), lstarc(), tstarc(), cvtarc(), runarc();
VOID arcdie();
static VOID expandlst();
#if _MTS
VOID etoa();
#endif
#if GEMDOS
long _stksize = 30720;
#endif
char *makefnam(); /* filename fixup routine */
/* Block I/O buffers */
u_char *pinbuf, *pakbuf, *outbuf, *outend;
static char **lst; /* files list */
static int lnum; /* length of files list */
int
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 *envfind(); /* environment searcher */
int n; /* index */
char *arctemp2, *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 5.21i, created on 11/25/92 at 14:40:55\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) {
strncpy(arctemp, arctemp2, STRLEN - 16);
arctemp[STRLEN - 17] = '\0';
n = strlen(arctemp);
if (arctemp[n - 1] != CUTOFF)
arctemp[n] = CUTOFF;
}
#if UNIX
else strcpy(arctemp, "/tmp/");
#endif
#if !MSDOS
{
static char tempname[] = "AXXXXXX";
/* This name is used safely, ignore linker warnings. */
strcat(arctemp, mktemp(tempname));
}
#else
strcat(arctemp, "$ARCTEMP");
#endif
#else
guinfo("SHFSEP ", gotinf);
sepchr[0] = gotinf[0];
guinfo("SCRFCHAR", gotinf);
tmpchr[0] = gotinf[0];
arctemp = "-$$$";
arctemp[0] = tmpchr[0];
#endif
arctemp2 = NULL;
#if !UNIX
/* avoid any case problems with arguments */
for (n = 1; n < num; n++) /* for each argument */
upper(arg[n]); /* convert it to uppercase */
#else
/* avoid case problems with command options */
upper(arg[1]); /* convert to uppercase */
#endif
for (n = 1; n < num; n++)
if (strlen(arg[n]) > (STRLEN - 16))
{
fprintf(stderr, "Too long argument: %s\n", arg[n]);
exit(235);
}
/* create archive names, supplying defaults */
#if UNIX
if (!stat(arg[2],&sbuf)) {
if ((sbuf.st_mode & S_IFMT) == S_IFDIR)
makefnam(arg[2],".arc",arcname);
else
strcpy(arcname,arg[2]);
} else
makefnam(arg[2],".arc",arcname);
#else
makefnam(arg[2], ".ARC", arcname);
#endif
/* makefnam(".$$$",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? */
arcdie("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
arcdie("%c is an unknown command", *a);
}
if (!opt)
arcdie("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]; /* delete this entry */
if (arctemp2[0] == '>') {
append = 1;
arctemp2++;
}
else append = 0;
}
#endif
else
n++;
}
#if GEMDOS
if (arctemp2)
freopen(arctemp2,append ? "a" : "w",stdout);
#endif
/* Allocate space to I/O buffers */
if (!(pinbuf = malloc(MYBUF)))
arcdie("Not enough memory for input buffer.");
if (!(outbuf = malloc(MYBUF)))
arcdie("Not enough memory for output buffer.");
if (!(pakbuf = malloc(2L*MYBUF)))
arcdie("Not enough memory for packing buffer.");
outend = outbuf + MYBUF - 1;
/* 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:
arcdie("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 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")))
arcdie("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 *))))
arcdie("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);
}
|