src/lhext.c

   1 /* ------------------------------------------------------------------------ */
   2 /* LHa for UNIX                                                             */
   3 /*              lhext.c -- LHarc extract                                    */
   4 /*                                                                          */
   5 /*      Copyright (C) MCMLXXXIX Yooichi.Tagawa                              */
   6 /*      Modified                Nobutaka Watazaki                           */
   7 /*                                                                          */
   8 /*  Ver. 0.00  Original                             1988.05.23  Y.Tagawa    */
   9 /*  Ver. 1.00  Fixed                                1989.09.22  Y.Tagawa    */
  10 /*  Ver. 0.03  LHa for UNIX                         1991.12.17  M.Oki       */
  11 /*  Ver. 1.12  LHa for UNIX                         1993.10.01  N.Watazaki  */
  12 /*  Ver. 1.13b Symbolic Link Update Bug Fix         1994.06.21  N.Watazaki  */
  13 /*  Ver. 1.14  Source All chagned                   1995.01.14  N.Watazaki  */
  14 /*  Ver. 1.14e bugfix                               1999.04.30  T.Okamoto   */
  15 /* ------------------------------------------------------------------------ */
  16 #include "lha.h"
  17 /* ------------------------------------------------------------------------ */
  18 static int      skip_flg = FALSE;   /* FALSE..No Skip , TRUE..Skip */
  19 static char    *methods[] =
  20 {
  21     LZHUFF0_METHOD, LZHUFF1_METHOD, LZHUFF2_METHOD, LZHUFF3_METHOD,
  22     LZHUFF4_METHOD, LZHUFF5_METHOD, LZHUFF6_METHOD, LZHUFF7_METHOD,
  23     LARC_METHOD, LARC5_METHOD, LARC4_METHOD,
  24     LZHDIRS_METHOD,
  25     NULL
  26 };
  27
  28 static void add_dirinfo(char* name, LzHeader* hdr);
  29 static void adjust_dirinfo();
  30
  31 /* ------------------------------------------------------------------------ */
  32 static          boolean
  33 inquire_extract(name)
  34     char           *name;
  35 {
  36     struct stat     stbuf;
  37
  38     skip_flg = FALSE;
  39     if (stat(name, &stbuf) >= 0) {
  40         if (!is_regularfile(&stbuf)) {
  41             error("\"%s\" already exists (not a file)", name);
  42             return FALSE;
  43         }
  44
  45         if (noexec) {
  46             printf("EXTRACT %s but file is exist.\n", name);
  47             return FALSE;
  48         }
  49         else if (!force) {
  50             if (!isatty(0)) {
  51                 warning("skip to extract %s.", name);
  52                 return FALSE;
  53             }
  54
  55             switch (inquire("OverWrite ?(Yes/[No]/All/Skip)", name, "YyNnAaSs\n")) {
  56             case 0:
  57             case 1:/* Y/y */
  58                 break;
  59             case 2:
  60             case 3:/* N/n */
  61             case 8:/* Return */
  62                 return FALSE;
  63             case 4:
  64             case 5:/* A/a */
  65                 force = TRUE;
  66                 break;
  67             case 6:
  68             case 7:/* S/s */
  69                 skip_flg = TRUE;
  70                 break;
  71             }
  72         }
  73     }
  74
  75     if (noexec)
  76         printf("EXTRACT %s\n", name);
  77
  78     return TRUE;
  79 }
  80
  81 /* ------------------------------------------------------------------------ */
  82 static          boolean
  83 make_parent_path(name)
  84     char           *name;
  85 {
  86     char            path[FILENAME_LENGTH];
  87     struct stat     stbuf;
  88     register char  *p;
  89
  90     /* make parent directory name into PATH for recursive call */
  91     strcpy(path, name);
  92     for (p = path + strlen(path); p > path; p--)
  93         if (p[-1] == '/') {
  94             *--p = '\0';
  95             break;
  96         }
  97
  98     if (p == path) {
  99         message("invalid path name \"%s\"", name);
 100         return FALSE;   /* no more parent. */
 101     }
 102
 103     if (GETSTAT(path, &stbuf) >= 0) {
 104         if (is_directory(&stbuf))
 105             return TRUE;
 106     }
 107
 108     if (verbose)
 109         message("Making directory \"%s\".", path);
 110
 111 #if defined __MINGW32__
 112     if (mkdir(path) >= 0)
 113         return TRUE;
 114 #else
 115     if (mkdir(path, 0777) >= 0) /* try */
 116         return TRUE;    /* successful done. */
 117 #endif
 118
 119     if (!make_parent_path(path))
 120         return FALSE;
 121
 122 #if defined __MINGW32__
 123     if (mkdir(path) < 0) {      /* try again */
 124         error("Cannot make directory \"%s\"", path);
 125         return FALSE;
 126     }
 127 #else
 128     if (mkdir(path, 0777) < 0) {    /* try again */
 129         error("Cannot make directory \"%s\"", path);
 130         return FALSE;
 131     }
 132 #endif
 133
 134     return TRUE;
 135 }
 136
 137 /* ------------------------------------------------------------------------ */
 138 static FILE    *
 139 open_with_make_path(name)
 140     char           *name;
 141 {
 142     FILE           *fp;
 143
 144     if ((fp = fopen(name, WRITE_BINARY)) == NULL) {
 145         if (!make_parent_path(name) ||
 146             (fp = fopen(name, WRITE_BINARY)) == NULL)
 147             error("Cannot extract a file \"%s\"", name);
 148     }
 149     return fp;
 150 }
 151
 152 /* ------------------------------------------------------------------------ */
 153 static void
 154 adjust_info(name, hdr)
 155     char           *name;
 156     LzHeader       *hdr;
 157 {
 158     struct utimbuf utimebuf;
 159
 160     /* adjust file stamp */
 161     utimebuf.actime = utimebuf.modtime = hdr->unix_last_modified_stamp;
 162
 163     if ((hdr->unix_mode & UNIX_FILE_TYPEMASK) != UNIX_FILE_SYMLINK)
 164         utime(name, &utimebuf);
 165
 166     if (hdr->extend_type == EXTEND_UNIX
 167         || hdr->extend_type == EXTEND_OS68K
 168         || hdr->extend_type == EXTEND_XOSK) {
 169 #ifdef NOT_COMPATIBLE_MODE
 170         Please need your modification in this space.
 171 #else
 172         if ((hdr->unix_mode & UNIX_FILE_TYPEMASK) != UNIX_FILE_SYMLINK)
 173             chmod(name, hdr->unix_mode);
 174 #endif
 175         if (!getuid()){
 176             uid_t uid = hdr->unix_uid;
 177             gid_t gid = hdr->unix_gid;
 178
 179 #if HAVE_GETPWNAM && HAVE_GETGRNAM
 180             if (hdr->user[0]) {
 181                 struct passwd *ent = getpwnam(hdr->user);
 182                 if (ent) uid = ent->pw_uid;
 183             }
 184             if (hdr->group[0]) {
 185                 struct group *ent = getgrnam(hdr->group);
 186                 if (ent) gid = ent->gr_gid;
 187             }
 188 #endif
 189
 190 #if HAVE_LCHOWN
 191             if ((hdr->unix_mode & UNIX_FILE_TYPEMASK) == UNIX_FILE_SYMLINK)
 192                 lchown(name, uid, gid);
 193             else
 194 #endif /* HAVE_LCHWON */
 195                 chown(name, uid, gid);
 196         }
 197     }
 198 #if __CYGWIN__
 199     else {
 200         /* On Cygwin, execute permission should be set for .exe or .dll. */
 201         mode_t m;
 202
 203         umask(m = umask(0));    /* get current umask */
 204         chmod(name, 0777 & ~m);
 205     }
 206 #endif
 207 }
 208
 209 /* ------------------------------------------------------------------------ */
 210 static size_t
 211 extract_one(afp, hdr)
 212     FILE           *afp;    /* archive file */
 213     LzHeader       *hdr;
 214 {
 215     FILE           *fp; /* output file */
 216     struct stat     stbuf;
 217     char            name[FILENAME_LENGTH];
 218     unsigned int crc;
 219     int             method;
 220     boolean         save_quiet, save_verbose, up_flag;
 221     char           *q = hdr->name, c;
 222     size_t read_size = 0;
 223
 224     if (ignore_directory && strrchr(hdr->name, '/')) {
 225         q = (char *) strrchr(hdr->name, '/') + 1;
 226     }
 227     else {
 228         if (*q == '/') {
 229             q++;
 230             /*
 231              * if OSK then strip device name
 232              */
 233             if (hdr->extend_type == EXTEND_OS68K
 234                 || hdr->extend_type == EXTEND_XOSK) {
 235                 do
 236                     c = (*q++);
 237                 while (c && c != '/');
 238                 if (!c || !*q)
 239                     q = ".";    /* if device name only */
 240             }
 241         }
 242     }
 243
 244     if (extract_directory)
 245         xsnprintf(name, sizeof(name), "%s/%s", extract_directory, q);
 246     else
 247         strcpy(name, q);
 248
 249
 250     /* LZHDIRS_METHOD¤ò»ý¤Ä¥Ø¥Ã¥À¤ò¥Á¥§¥Ã¥¯¤¹¤ë */
 251     /* 1999.4.30 t.okamoto */
 252     for (method = 0;; method++) {
 253         if (methods[method] == NULL) {
 254             error("Unknown method \"%.*s\"; \"%s\" will be skiped ...",
 255                   5, hdr->method, name);
 256             return read_size;
 257         }
 258         if (memcmp(hdr->method, methods[method], 5) == 0)
 259             break;
 260     }
 261
 262     if ((hdr->unix_mode & UNIX_FILE_TYPEMASK) == UNIX_FILE_REGULAR
 263         && method != LZHDIRS_METHOD_NUM) {
 264     extract_regular:
 265 #if 0
 266         for (method = 0;; method++) {
 267             if (methods[method] == NULL) {
 268                 error("Unknown method \"%.*s\"; \"%s\" will be skiped ...",
 269                       5, hdr->method, name);
 270                 return read_size;
 271             }
 272             if (memcmp(hdr->method, methods[method], 5) == 0)
 273                 break;
 274         }
 275 #endif
 276
 277         reading_filename = archive_name;
 278         writing_filename = name;
 279         if (output_to_stdout || verify_mode) {
 280             if (noexec) {
 281                 printf("%s %s\n", verify_mode ? "VERIFY" : "EXTRACT", name);
 282                 return read_size;
 283             }
 284
 285             save_quiet = quiet;
 286             save_verbose = verbose;
 287             if (!quiet && output_to_stdout) {
 288                 printf("::::::::\n%s\n::::::::\n", name);
 289                 quiet = TRUE;
 290                 verbose = FALSE;
 291             }
 292             else if (verify_mode) {
 293                 quiet = FALSE;
 294                 verbose = TRUE;
 295             }
 296
 297 #if __MINGW32__
 298             {
 299                 int old_mode;
 300                 fflush(stdout);
 301                 old_mode = setmode(fileno(stdout), O_BINARY);
 302 #endif
 303
 304             crc = decode_lzhuf(afp, stdout,
 305                                hdr->original_size, hdr->packed_size,
 306                                name, method, &read_size);
 307 #if __MINGW32__
 308                 fflush(stdout);
 309                 setmode(fileno(stdout), old_mode);
 310             }
 311 #endif
 312             quiet = save_quiet;
 313             verbose = save_verbose;
 314         }
 315         else {
 316             if (skip_flg == FALSE)  {
 317                 up_flag = inquire_extract(name);
 318                 if (up_flag == FALSE && force == FALSE) {
 319                     return read_size;
 320                 }
 321             }
 322
 323             if (skip_flg == TRUE) { /* if skip_flg */
 324                 if (stat(name, &stbuf) == 0 && force != TRUE) {
 325                     if (stbuf.st_mtime >= hdr->unix_last_modified_stamp) {
 326                         if (quiet != TRUE)
 327                             printf("%s : Skipped...\n", name);
 328                         return read_size;
 329                     }
 330                 }
 331             }
 332             if (noexec) {
 333                 return read_size;
 334             }
 335
 336             signal(SIGINT, interrupt);
 337 #ifdef SIGHUP
 338             signal(SIGHUP, interrupt);
 339 #endif
 340
 341             unlink(name);
 342             remove_extracting_file_when_interrupt = TRUE;
 343
 344             if ((fp = open_with_make_path(name)) != NULL) {
 345                 crc = decode_lzhuf(afp, fp,
 346                                    hdr->original_size, hdr->packed_size,
 347                                    name, method, &read_size);
 348                 fclose(fp);
 349             }
 350             remove_extracting_file_when_interrupt = FALSE;
 351             signal(SIGINT, SIG_DFL);
 352 #ifdef SIGHUP
 353             signal(SIGHUP, SIG_DFL);
 354 #endif
 355             if (!fp)
 356                 return read_size;
 357         }
 358
 359         if (hdr->has_crc && crc != hdr->crc)
 360             error("CRC error: \"%s\"", name);
 361     }
 362     else if ((hdr->unix_mode & UNIX_FILE_TYPEMASK) == UNIX_FILE_DIRECTORY
 363              || (hdr->unix_mode & UNIX_FILE_TYPEMASK) == UNIX_FILE_SYMLINK
 364              || method == LZHDIRS_METHOD_NUM) {
 365         /* ¢¬¤³¤ì¤Ç¡¢Symbolic Link ¤Ï¡¢Âç¾æÉ×¤«¡© */
 366         if (!ignore_directory && !verify_mode) {
 367             if (noexec) {
 368                 if (quiet != TRUE)
 369                     printf("EXTRACT %s (directory)\n", name);
 370                 return read_size;
 371             }
 372             /* NAME has trailing SLASH '/', (^_^) */
 373             if ((hdr->unix_mode & UNIX_FILE_TYPEMASK) == UNIX_FILE_SYMLINK) {
 374                 int             l_code;
 375
 376 #ifdef S_IFLNK
 377                 if (skip_flg == FALSE)  {
 378                     up_flag = inquire_extract(name);
 379                     if (up_flag == FALSE && force == FALSE) {
 380                         return read_size;
 381                     }
 382                 } else {
 383                     if (GETSTAT(name, &stbuf) == 0 && force != TRUE) {
 384                         if (stbuf.st_mtime >= hdr->unix_last_modified_stamp) {
 385                             if (quiet != TRUE)
 386                                 printf("%s : Skipped...\n", name);
 387                             return read_size;
 388                         }
 389                     }
 390                 }
 391
 392                 unlink(name);
 393                 make_parent_path(name);
 394                 l_code = symlink(hdr->realname, name);
 395                 if (l_code < 0) {
 396                     if (quiet != TRUE)
 397                         warning("Can't make Symbolic Link \"%s\" -> \"%s\"",
 398                                 hdr->realname, name);
 399                 }
 400                 if (quiet != TRUE) {
 401                     message("Symbolic Link %s -> %s",
 402                             hdr->realname, name);
 403                 }
 404 #else
 405                 warning("Can't make Symbolic Link %s -> %s",
 406                         hdr->realname, name);
 407                 return read_size;
 408 #endif
 409             } else { /* make directory */
 410                 if (!output_to_stdout && !make_parent_path(name))
 411                     return read_size;
 412                 /* save directory information */
 413                 add_dirinfo(name, hdr);
 414             }
 415         }
 416     }
 417     else {
 418         if (force)              /* force extract */
 419             goto extract_regular;
 420         else
 421             error("Unknown file type: \"%s\". use `f' option to force extract.", name);
 422     }
 423
 424     if (!output_to_stdout)
 425         adjust_info(name, hdr);
 426
 427     return read_size;
 428 }
 429
 430 /* ------------------------------------------------------------------------ */
 431 /* EXTRACT COMMAND MAIN                                                     */
 432 /* ------------------------------------------------------------------------ */
 433 void
 434 cmd_extract()
 435 {
 436     LzHeader        hdr;
 437     off_t           pos;
 438     FILE           *afp;
 439     size_t read_size;
 440
 441     /* open archive file */
 442     if ((afp = open_old_archive()) == NULL)
 443         fatal_error("Cannot open archive file \"%s\"", archive_name);
 444
 445     if (archive_is_msdos_sfx1(archive_name))
 446         seek_lha_header(afp);
 447
 448     /* extract each files */
 449     while (get_header(afp, &hdr)) {
 450         if (need_file(hdr.name)) {
 451             pos = ftello(afp);
 452             read_size = extract_one(afp, &hdr);
 453             if (read_size != hdr.packed_size) {
 454                 /* when error occurred in extract_one(), should adjust
 455                    point of file stream */
 456                 if (pos != -1 && afp != stdin)
 457                     fseeko(afp, pos + hdr.packed_size - read_size, SEEK_SET);
 458                 else {
 459                     size_t i = hdr.packed_size - read_size;
 460                     while (i--) fgetc(afp);
 461                 }
 462             }
 463         } else {
 464             if (afp != stdin)
 465                 fseeko(afp, hdr.packed_size, SEEK_CUR);
 466             else {
 467                 size_t i = hdr.packed_size;
 468                 while (i--) fgetc(afp);
 469             }
 470         }
 471     }
 472
 473     /* close archive file */
 474     fclose(afp);
 475
 476     /* adjust directory information */
 477     adjust_dirinfo();
 478
 479     return;
 480 }
 481
 482 /*
 483  * restore directory information (time stamp).
 484  * added by A.Iriyama  2003.12.12
 485  */
 486
 487 typedef struct lhdDirectoryInfo_t {
 488     struct lhdDirectoryInfo_t *next;
 489     LzHeader hdr;
 490 } LzHeaderList;
 491
 492 static LzHeaderList *dirinfo;
 493
 494 static void add_dirinfo(char *name, LzHeader *hdr)
 495 {
 496     LzHeaderList *p;
 497
 498     if (memcmp(hdr->method, LZHDIRS_METHOD, 5) != 0)
 499         return;
 500
 501     p = xmalloc(sizeof(LzHeaderList));
 502
 503     memcpy(&p->hdr, hdr, sizeof(LzHeader));
 504     strncpy(p->hdr.name, name, sizeof(p->hdr.name));
 505     p->hdr.name[sizeof(p->hdr.name)-1] = 0;
 506
 507     {
 508         LzHeaderList *tmp = dirinfo;
 509         dirinfo = p;
 510         dirinfo->next = tmp;
 511     }
 512 }
 513
 514 static void adjust_dirinfo()
 515 {
 516     while (dirinfo) {
 517         adjust_info(dirinfo->hdr.name, &dirinfo->hdr);
 518
 519         {
 520             LzHeaderList *tmp = dirinfo;
 521             dirinfo = dirinfo->next;
 522             free(tmp);
 523         }
 524     }
 525 }