1 /***********************************************************
3 ***********************************************************/
5 static char *version = "0.01";
8 "ar -- compression archiver -- written by Haruhiko Okumura\n"
9 " PC-VAN:SCIENCE CompuServe:74050,1022\n"
10 " NIFTY-Serve:PAF01022 INTERNET:74050.1022@compuserve.com\n"
11 "Usage: ar command archive [file ...]\n"
13 " a: Add files to archive (replace if present)\n"
14 " x: Extract files from archive\n"
15 " r: Replace files in archive\n"
16 " d: Delete files from archive\n"
17 " p: Print files on standard output\n"
18 " l: List contents of archive\n"
19 "If no files are named, all files in archive are processed,\n"
20 " except for commands 'a' and 'd'.\n"
21 "You may copy, distribute, and rewrite this program freely.\n";
23 /***********************************************************
25 Structure of archive block (low order byte first):
28 = 25 + strlen(filename) (= 0 if end of archive)
29 1 basic header algebraic sum (mod 256)
31 5 method ("-lh0-" = stored, "-lh5-" = compressed)
32 4 compressed size (including extended headers)
41 2 first extended header size (0 if none)
42 -----first extended header, etc.
45 ***********************************************************/
57 struct lha_method methods[] = {
58 /* id, dicbit, pbit, maxmatch */
59 /* note: dicbit == 0 means no compress */
60 /* (1U << pbit) > np(dicbit+1) */
61 {"-lh0-", 0, 0, 0}, /* 0: no compress */
62 {"-lh1-", 12, 0, 60}, /* 1: 2^12 = 4KB dynamic huffman (LHarc) */
63 {"-lh2-", 13, 0,256}, /* 2: 2^13 = 8KB dynamic huffman */
64 {"-lh3-", 13, 0,256}, /* 3: 2^13 = 8KB static huffman */
65 {"-lh4-", 12, 4,256}, /* 4: 2^12 = 4KB static huffman (pos and len)*/
66 {"-lh5-", 13, 4,256}, /* 5: 2^13 = 8KB static huffman (pos and len)*/
67 {"-lh6-", 15, 5,256}, /* 6: 2^15 = 32KB static huffman (pos and len)*/
68 {"-lh7-", 16, 5,256}, /* 7: 2^16 = 64KB static huffman (pos and len)*/
69 {"-lzs-", 11, 0, 17}, /* 8: 2^11 = 2KB (LArc) */
70 {"-lz5-", 12, 0, 17}, /* 9: 2^12 = 4KB (LArc) */
71 {"-lz4-", 0, 0, 0}, /*10: no compress (LArc) */
72 {"-lhd-", 0, 0, 0}, /*11: directory */
78 which_method(char *id)
82 for (i = 0; i < sizeof(methods)/sizeof(methods[0]); i++) {
83 if (strncmp(id, methods[i].id, sizeof(methods[0].id)) == 0) {
100 printf("version %s\n", version);
105 ratio(ulong a, ulong b)
106 { /* [(1000a + [b/2]) / b] */
109 for (i = 0; i < 3; i++)
110 if (a <= ULONG_MAX / 10)
114 if ((ulong) (a + (b >> 1)) < a) {
120 return (uint) ((a + (b >> 1)) / b);
124 skip(FILE *fp, struct lzh_header *h)
127 if (opts.archive_to_stdio)
128 for (i = 0; i < h->compsize; i++)
131 fseek(fp, h->compsize, SEEK_CUR);
135 copy(FILE *arcfile, FILE *outfile, struct lzh_header *h)
138 uchar buffer[MAXDICSIZ];
140 write_header(outfile, h);
141 while (h->compsize != 0) {
142 n = (uint) ((h->compsize > sizeof(buffer)) ? sizeof(buffer) : h->compsize);
143 if (fread((char *) buffer, 1, n, arcfile) != n)
145 if (fwrite((char *) buffer, 1, n, outfile) != n)
146 error("Can't write");
152 get_line(char *s, int n)
157 while ((c = getchar()) != EOF && c != '\n')
165 match(char *s1, char *s2)
168 while (*s2 == '*' || *s2 == '?') {
170 while (*s1 && *s1 != *s2)
187 search(int argc, char *argv[], struct lzh_header *h)
193 for (i = 0; i < argc; i++)
194 if (argv[i] && match(h->filename, argv[i]))
199 #include "getopt_long.h"
202 parse_args(int argc, char **argv)
207 /* int this_option_optind = optind ? optind : 1; */
208 int option_index = 0;
215 static struct option long_options[] = {
216 /* name, has_arg, *flag, val */
219 required_argument (1)
220 optional_argument (2)
222 NULL: getopt_long() return val
223 non-NULL: getopt_long() return 0, and *flag set val.
225 {"help", no_argument, NULL, LHA_OPT_HELP},
226 {"version", no_argument, NULL, LHA_OPT_VERSION},
230 c = getopt_long(argc, argv, "012fgo[567]q[012]vw:z",
231 long_options, &option_index);
233 if (c == -1) break; /* end of parsing options */
240 /* set value by long option */
242 case '0': case '1': case '2':
244 opts.header_level = c - '0';
247 opts.force_extract = 1;
251 opts.header_level = 0;
254 /* compress method */
256 int idx = 1; /* -o means -lh1- method */
259 idx = *optarg - '0'; /* -lh[567]- method */
261 opts.method = &methods[idx];
266 opts.quiet = 2; /* -q is equivalent to -q2 */
268 opts.quiet = *optarg - '0';
276 /* extract directory */
278 error("extract directory does not specified for `-w'");
282 opts.outdir = optarg;
284 case 'z': /* no compress */
290 case LHA_OPT_VERSION:
306 error("Can't open temporary file");
312 main(int argc, char *argv[])
314 int i, cmd, count, nfiles, found, done;
318 struct lzh_istream r, *rp;
319 struct lzh_ostream w, *wp;
320 FILE *arcfile = NULL;
321 FILE *outfile = NULL;
326 INITIALIZE_OPTS(opts);
331 /*take a command character */
343 /* -<cmd> -<opts> ... */
348 /* -<cmd><opts> => -<opts> */
353 parse_args(argc, argv);
357 archive_file = argv[0];
359 if (strcmp(archive_file, "-") == 0)
360 opts.archive_to_stdio = 1;
361 if (opts.archive_to_stdio)
368 count = done = nfiles = 0;
374 outfile = open_tempfile();
378 error("archived files are not specified.");
380 if (!opts.archive_to_stdio && (cmd == 'a' || cmd == 'u')) {
381 if (file_exists(archive_file)) {
382 arcfile = fopen(archive_file, "rb");
384 error("Can't open archive '%s'", archive_file);
389 for (i = 0; i < argc; i++) {
390 add(wp, 0, argv[i], strlen(argv[i]));
393 fputc(0, outfile); /* end of archive */
395 error("Can't write");
397 if (opts.archive_to_stdio) {
398 if (copy_stream(outfile, stdout) == -1)
399 error("fail to copy_stream_to_file(): temp -> %s","stdout");
402 if (copy_stream_to_file(outfile, archive_file) == -1)
403 error("fail to copy_stream_to_file(): temp -> %s",archive_file);
410 message("No files given in argument, do nothing.");
413 outfile = open_tempfile();
419 if (opts.archive_to_stdio) {
423 arcfile = fopen(archive_file, "rb");
426 error("Can't open archive '%s'", archive_file);
434 /* change directory to extract dir */
437 if (mkdir(opts.outdir, 0777) == -1) {
439 error("cannot make directory \"%s\"", opts.outdir);
442 if (chdir(opts.outdir) == -1)
443 error("cannot change directory \"%s\"", opts.outdir);
449 while (!done && read_header(arcfile, &h)) {
453 found = search(argc, argv, &h);
463 if (file_mtime(h.filename, &mtime) == -1 || h.mtime > mtime) {
464 copy(arcfile, outfile, &h);
469 if (add(wp, 1, h.filename, h.namelen)) {
474 copy(arcfile, outfile, &h);
477 copy(arcfile, outfile, &h);
482 message("'%s' deleted", h.filename);
486 copy(arcfile, outfile, &h);
492 rp->compsize = h.compsize;
493 extract(rp, cmd == 'x', &h);
494 if (++count == nfiles)
506 if (++count == nfiles)
514 if (cmd == 'a' || cmd == 'u') {
515 for (i = 0; i < argc; i++) {
518 add(wp, 0, argv[i], strlen(argv[i]));
525 printf(" %d files\n", count);
528 if (count > 0 && (cmd == 'd' || cmd == 'a' || cmd == 'u')) {
529 fputc(0, outfile); /* end of archive */
531 error("Can't write");
532 if (!opts.archive_to_stdio)
533 unlink(archive_file);
538 if (arc_count > count) {
539 if (copy_stream_to_file(outfile, archive_file) == -1)
540 error("fail to copy_stream_to_file(): temp -> %s",archive_file);
543 message("The archive file \"%s\" was removed because it would be empty.", archive_file);
547 if (copy_stream_to_file(outfile, archive_file) == -1)
548 error("fail to copy_stream_to_file(): temp -> %s",archive_file);