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- /*---------------------------------------------------------------------------
-
- extract.c
-
- This file contains the high-level routines ("driver routines") for extrac-
- ting and testing zipfile members. It calls the low-level routines in files
- explode.c, inflate.c, unreduce.c and unshrink.c.
-
- ---------------------------------------------------------------------------*/
-
-
- #include "unzip.h"
- #include "crypt.h"
- #ifdef MSWIN
- # include "wizunzip.h"
- # include "replace.h"
- #endif
-
- int newfile; /* used also in file_io.c (flush()) */
- ulg *crc_32_tab; /* used also in file_io.c and crypt.c (full version) */
-
- static void makecrc __((void));
- static int store_info __((void));
- static int extract_or_test_member __((void));
-
-
- /*******************************/
- /* Strings used in extract.c */
- /*******************************/
-
- static char Far VersionMsg[] =
- " skipping: %-22s need %s compat. v%u.%u (can do v%u.%u)\n";
- static char Far ComprMsg[] =
- " skipping: %-22s compression method %d\n";
- static char Far FilNamMsg[] =
- "%s: bad filename length (%s)\n";
- static char Far ExtFieldMsg[] =
- "%s: bad extra field length (%s)\n";
- static char Far OffsetMsg[] =
- "file #%d: bad zipfile offset (%s): %ld\n";
- static char Far ExtractMsg[] =
- "%8sing: %-22s %s%s";
- #ifndef SFX
- static char Far LengthMsg[] =
- "%s %s: %ld bytes required to uncompress to %lu bytes;\n %s\
- supposed to require %lu bytes%s%s%s\n";
- #endif
-
- static char Far BadFileCommLength[] = "\n%s: bad file comment length\n";
- static char Far LocalHdrSig[] = "local header sig";
- static char Far BadLocalHdr[] = "\nfile #%d: bad local header\n";
- static char Far AttemptRecompensate[] = " (attempting to re-compensate)\n";
- static char Far SkipVolumeLabel[] = " skipping: %-22s %svolume label\n";
- static char Far ReplaceQuery[] =
- "replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ";
- static char Far AssumeNone[] = " NULL\n(assuming [N]one)\n";
- static char Far NewName[] = "new name: ";
- static char Far InvalidResponse[] = "error: invalid response [%c]\n";
- static char Far ErrorInArchive[] = "At least one %serror was detected in %s.\n";
- static char Far ZeroFilesTested[] = "Caution: zero files tested in %s.\n";
-
- #ifndef VMS
- static char Far VMSFormat[] =
- "\n%s: stored in VMS format. Extract anyway? (y/n) ";
- #endif
-
- #ifdef CRYPT
- static char Far SkipCantGetPasswd[] =
- " skipping: %-22s unable to get password\n";
- static char Far SkipIncorrectPasswd[] =
- " skipping: %-22s incorrect password\n";
- static char Far FilesSkipBadPasswd[] =
- "%d file%s skipped because of incorrect password.\n";
- static char Far MaybeBadPasswd[] =
- " (may instead be incorrect password)\n";
- #else
- static char Far SkipEncrypted[] =
- " skipping: %-22s encrypted (not supported)\n";
- #endif
-
- static char Far NoErrInCompData[] =
- "No errors detected in compressed data of %s.\n";
- static char Far NoErrInTestedFiles[] =
- "No errors detected in %s for the %d file%s tested.\n";
- static char Far FilesSkipped[] =
- "%d file%s skipped because of unsupported compression or encoding.\n";
-
- static char Far ErrUnzipFile[] = " error: %s%s %s\n";
- static char Far ErrUnzipNoFile[] = "\n error: %s%s\n";
- static char Far NotEnoughMem[] = "not enough memory to ";
- static char Far InvalidComprData[] = "invalid compressed data to ";
- static char Far Inflate[] = "inflate";
-
- #ifndef SFX
- static char Far Explode[] = "explode";
- static char Far Unshrink[] = "unshrink";
- #endif
-
- static char Far FileUnknownCompMethod[] = "%s: unknown compression method\n";
- static char Far BadCRC[] = " bad CRC %08lx (should be %08lx)\n";
- static char Far UnsupportedExtraField[] =
- "warning: unsupported extra field compression type--skipping\n";
- static char Far BadExtraFieldCRC[] =
- "error [%s]: bad extra field CRC %08lx (should be %08lx)\n";
-
-
-
-
-
- /**************************************/
- /* Function extract_or_test_files() */
- /**************************************/
-
- int extract_or_test_files() /* return PK-type error code */
- {
- uch *cd_inptr;
- int cd_incnt, error, error_in_archive=PK_COOL;
- int i, j, renamed, query, len, filnum=(-1), blknum=0;
- int *fn_matched=NULL, *xn_matched=NULL;
- ush members_remaining, num_skipped=0, num_bad_pwd=0;
- long cd_bufstart, bufstart, inbuf_offset, request;
- LONGINT old_extra_bytes=0L;
- static min_info info[DIR_BLKSIZ];
-
-
- /*---------------------------------------------------------------------------
- The basic idea of this function is as follows. Since the central di-
- rectory lies at the end of the zipfile and the member files lie at the
- beginning or middle or wherever, it is not very desirable to simply
- read a central directory entry, jump to the member and extract it, and
- then jump back to the central directory. In the case of a large zipfile
- this would lead to a whole lot of disk-grinding, especially if each mem-
- ber file is small. Instead, we read from the central directory the per-
- tinent information for a block of files, then go extract/test the whole
- block. Thus this routine contains two small(er) loops within a very
- large outer loop: the first of the small ones reads a block of files
- from the central directory; the second extracts or tests each file; and
- the outer one loops over blocks. There's some file-pointer positioning
- stuff in between, but that's about it. Btw, it's because of this jump-
- ing around that we can afford to be lenient if an error occurs in one of
- the member files: we should still be able to go find the other members,
- since we know the offset of each from the beginning of the zipfile.
- ---------------------------------------------------------------------------*/
-
- pInfo = info;
- members_remaining = ecrec.total_entries_central_dir;
- #if (defined(CRYPT) || !defined(NO_ZIPINFO))
- newzip = TRUE;
- #endif
-
- /* malloc space for CRC table and generate it */
- if ((crc_32_tab = (ulg *)malloc(256*sizeof(ulg))) == (ulg *)NULL)
- return PK_MEM2;
- makecrc();
-
- /* malloc space for check on unmatched filespecs (OK if one or both NULL) */
- if (filespecs > 0 &&
- (fn_matched=(int *)malloc(filespecs*sizeof(int))) != (int *)NULL)
- for (i = 0; i < filespecs; ++i)
- fn_matched[i] = FALSE;
- if (xfilespecs > 0 &&
- (xn_matched=(int *)malloc(xfilespecs*sizeof(int))) != (int *)NULL)
- for (i = 0; i < xfilespecs; ++i)
- xn_matched[i] = FALSE;
-
- /*---------------------------------------------------------------------------
- Begin main loop over blocks of member files. We know the entire central
- directory is on this disk: we would not have any of this information un-
- less the end-of-central-directory record was on this disk, and we would
- not have gotten to this routine unless this is also the disk on which
- the central directory starts. In practice, this had better be the ONLY
- disk in the archive, but maybe someday we'll add multi-disk support.
- ---------------------------------------------------------------------------*/
-
- while (members_remaining) {
- j = 0;
-
- /*
- * Loop through files in central directory, storing offsets, file
- * attributes, case-conversion and text-conversion flags until block
- * size is reached.
- */
-
- while (members_remaining && (j < DIR_BLKSIZ)) {
- --members_remaining;
- pInfo = &info[j];
-
- if (readbuf(sig, 4) == 0) {
- error_in_archive = PK_EOF;
- members_remaining = 0; /* ...so no more left to do */
- break;
- }
- if (strncmp(sig, central_hdr_sig, 4)) { /* just to make sure */
- FPRINTF(stderr, LoadFarString(CentSigMsg), j); /* sig not found */
- FPRINTF(stderr, LoadFarString(ReportMsg)); /* check binary transfers */
- error_in_archive = PK_BADERR;
- members_remaining = 0; /* ...so no more left to do */
- break;
- }
- /* process_cdir_file_hdr() sets pInfo->hostnum, pInfo->lcflag */
- if ((error = process_cdir_file_hdr()) != PK_COOL) {
- error_in_archive = error; /* only PK_EOF defined */
- members_remaining = 0; /* ...so no more left to do */
- break;
- }
- if ((error = do_string(crec.filename_length,FILENAME)) != PK_COOL) {
- if (error > error_in_archive)
- error_in_archive = error;
- if (error > PK_WARN) { /* fatal: no more left to do */
- FPRINTF(stderr, LoadFarString(FilNamMsg), filename, "central");
- members_remaining = 0;
- break;
- }
- }
- if ((error = do_string(crec.extra_field_length, EXTRA_FIELD)) != 0)
- {
- if (error > error_in_archive)
- error_in_archive = error;
- if (error > PK_WARN) { /* fatal */
- FPRINTF(stderr, LoadFarString(ExtFieldMsg), filename, "central");
- members_remaining = 0;
- break;
- }
- }
- if ((error = do_string(crec.file_comment_length,SKIP)) != PK_COOL) {
- if (error > error_in_archive)
- error_in_archive = error;
- if (error > PK_WARN) { /* fatal */
- FPRINTF(stderr, LoadFarString(BadFileCommLength),
- filename);
- members_remaining = 0;
- break;
- }
- }
- if (process_all_files) {
- if (store_info())
- ++j; /* file is OK; info[] stored; continue with next */
- else
- ++num_skipped;
- } else {
- int do_this_file = FALSE;
- char **pfn = pfnames-1;
-
- while (*++pfn)
- if (match(filename, *pfn, C_flag)) {
- do_this_file = TRUE; /* ^-- ignore case or not? */
- if (fn_matched)
- fn_matched[pfn-pfnames] = TRUE;
- break; /* found match, so stop looping */
- }
- if (do_this_file) { /* check if this is an excluded file */
- char **pxn = pxnames-1;
-
- while (*++pxn)
- if (match(filename, *pxn, C_flag)) {
- do_this_file = FALSE; /* ^-- ignore case or not? */
- if (xn_matched)
- xn_matched[pxn-pxnames] = TRUE;
- break;
- }
- }
- if (do_this_file)
- if (store_info())
- ++j; /* file is OK */
- else
- ++num_skipped; /* unsupp. compression or encryption */
- } /* end if (process_all_files) */
-
-
- } /* end while-loop (adding files to current block) */
-
- /* save position in central directory so can come back later */
- cd_bufstart = cur_zipfile_bufstart;
- cd_inptr = inptr;
- cd_incnt = incnt;
-
- /*-----------------------------------------------------------------------
- Second loop: process files in current block, extracting or testing
- each one.
- -----------------------------------------------------------------------*/
-
- for (i = 0; i < j; ++i) {
- filnum = i + blknum*DIR_BLKSIZ;
- pInfo = &info[i];
-
- /* if the target position is not within the current input buffer
- * (either haven't yet read far enough, or (maybe) skipping back-
- * ward), skip to the target position and reset readbuf(). */
-
- /* LSEEK(pInfo->offset): */
- request = pInfo->offset + extra_bytes;
- inbuf_offset = request % INBUFSIZ;
- bufstart = request - inbuf_offset;
-
- Trace((stderr, "\ndebug: request = %ld, inbuf_offset = %ld\n",
- request, inbuf_offset));
- Trace((stderr,
- "debug: bufstart = %ld, cur_zipfile_bufstart = %ld\n",
- bufstart, cur_zipfile_bufstart));
- if (request < 0) {
- FPRINTF(stderr, LoadFarStringSmall(SeekMsg), zipfn,
- LoadFarString(ReportMsg));
- error_in_archive = PK_ERR;
- if (filnum == 0 && extra_bytes != 0L) {
- FPRINTF(stderr, LoadFarString(AttemptRecompensate));
- old_extra_bytes = extra_bytes;
- extra_bytes = 0L;
- request = pInfo->offset; /* could also check if this != 0 */
- inbuf_offset = request % INBUFSIZ;
- bufstart = request - inbuf_offset;
- Trace((stderr, "debug: request = %ld, inbuf_offset = %ld\n",
- request, inbuf_offset));
- Trace((stderr,
- "debug: bufstart = %ld, cur_zipfile_bufstart = %ld\n",
- bufstart, cur_zipfile_bufstart));
- } else {
- error_in_archive = PK_BADERR;
- continue; /* this one hosed; try next */
- }
- }
- /* try again */
- if (request < 0) {
- Trace((stderr, "debug: recompensated request still < 0\n"));
- FPRINTF(stderr, LoadFarStringSmall(SeekMsg), zipfn,
- LoadFarString(ReportMsg));
- error_in_archive = PK_BADERR;
- continue;
- } else if (bufstart != cur_zipfile_bufstart) {
- Trace((stderr, "debug: bufstart != cur_zipfile_bufstart\n"));
- cur_zipfile_bufstart = lseek(zipfd,(LONGINT)bufstart,SEEK_SET);
- if ((incnt = read(zipfd,(char *)inbuf,INBUFSIZ)) <= 0) {
- FPRINTF(stderr, LoadFarString(OffsetMsg), filnum, "lseek",
- bufstart);
- error_in_archive = PK_BADERR;
- continue; /* can still do next file */
- }
- inptr = inbuf + (int)inbuf_offset;
- incnt -= (int)inbuf_offset;
- } else {
- incnt += (inptr-inbuf) - (int)inbuf_offset;
- inptr = inbuf + (int)inbuf_offset;
- }
-
- /* should be in proper position now, so check for sig */
- if (readbuf(sig, 4) == 0) { /* bad offset */
- FPRINTF(stderr, LoadFarString(OffsetMsg), filnum, "EOF",
- request);
- error_in_archive = PK_BADERR;
- continue; /* but can still try next one */
- }
- if (strncmp(sig, local_hdr_sig, 4)) {
- FPRINTF(stderr, LoadFarString(OffsetMsg), filnum,
- LoadFarStringSmall(LocalHdrSig), request);
- error_in_archive = PK_ERR;
- if ((filnum == 0 && extra_bytes != 0L) ||
- (extra_bytes == 0L && old_extra_bytes != 0L)) {
- FPRINTF(stderr, LoadFarString(AttemptRecompensate));
- if (extra_bytes) {
- old_extra_bytes = extra_bytes;
- extra_bytes = 0L;
- } else
- extra_bytes = old_extra_bytes; /* third attempt */
- LSEEK(pInfo->offset)
- if (readbuf(sig, 4) == 0) { /* bad offset */
- FPRINTF(stderr, LoadFarString(OffsetMsg), filnum, "EOF",
- request);
- error_in_archive = PK_BADERR;
- continue; /* but can still try next one */
- }
- if (strncmp(sig, local_hdr_sig, 4)) {
- FPRINTF(stderr, LoadFarString(OffsetMsg), filnum,
- LoadFarStringSmall(LocalHdrSig), request);
- error_in_archive = PK_BADERR;
- continue;
- }
- } else
- continue; /* this one hosed; try next */
- }
- if ((error = process_local_file_hdr()) != PK_COOL) {
- FPRINTF(stderr, LoadFarString(BadLocalHdr), filnum);
- error_in_archive = error; /* only PK_EOF defined */
- continue; /* can still try next one */
- }
- if ((error = do_string(lrec.filename_length,FILENAME)) != PK_COOL) {
- if (error > error_in_archive)
- error_in_archive = error;
- if (error > PK_WARN) {
- FPRINTF(stderr, LoadFarString(FilNamMsg), filename, "local");
- continue; /* go on to next one */
- }
- }
- if (extra_field != (uch *)NULL) {
- free(extra_field);
- extra_field = (uch *)NULL;
- }
- if ((error = do_string(lrec.extra_field_length,EXTRA_FIELD)) != 0) {
- if (error > error_in_archive)
- error_in_archive = error;
- if (error > PK_WARN) {
- FPRINTF(stderr, LoadFarString(ExtFieldMsg), filename, "local");
- continue; /* go on */
- }
- }
-
- /*
- * just about to extract file: if extracting to disk, check if
- * already exists, and if so, take appropriate action according to
- * fflag/uflag/overwrite_all/etc. (we couldn't do this in upper
- * loop because we don't store the possibly renamed filename[] in
- * info[])
- */
- if (!tflag && !cflag) {
- renamed = FALSE; /* user hasn't renamed output file yet */
-
- startover:
- query = FALSE;
- #ifdef MACOS
- macflag = (pInfo->hostnum == MAC_);
- #endif
- /* mapname can create dirs if not freshening or if renamed */
- if ((error = mapname(renamed)) > PK_WARN) {
- if (error == IZ_CREATED_DIR) {
-
- /* GRR: add code to set times/attribs on dirs--
- * save to list, sort when done (a la zip), set
- * times/attributes on deepest dirs first */
-
- } else if (error == IZ_VOL_LABEL) {
- FPRINTF(stderr,
- LoadFarString(SkipVolumeLabel), filename,
- #ifdef DOS_NT_OS2
- volflag? "hard disk " :
- #endif
- "");
- /* if (!error_in_archive)
- error_in_archive = PK_WARN; */
- } else if (error > PK_ERR && error_in_archive < PK_ERR)
- error_in_archive = PK_ERR;
- Trace((stderr, "mapname(%s) returns error = %d\n", filename,
- error));
- continue; /* go on to next file */
- }
-
- switch (check_for_newer(filename)) {
- case DOES_NOT_EXIST:
- if (fflag && !renamed) /* don't skip if just renamed */
- continue; /* freshen (no new files): skip */
- break;
- case EXISTS_AND_OLDER:
- if (overwrite_none)
- continue; /* never overwrite: skip file */
- if (!overwrite_all && !force_flag)
- query = TRUE;
- break;
- case EXISTS_AND_NEWER: /* (or equal) */
- if (overwrite_none || (uflag && !renamed))
- continue; /* skip if update/freshen & orig name */
- if (!overwrite_all && !force_flag)
- query = TRUE;
- break;
- }
- if (query) {
- #ifdef MSWIN
- FARPROC lpfnprocReplace;
- int ReplaceDlgRetVal; /* replace dialog return value */
-
- ShowCursor(FALSE); /* turn off cursor */
- SetCursor(hSaveCursor); /* restore the cursor */
- lpfnprocReplace = MakeProcInstance(ReplaceProc, hInst);
- ReplaceDlgRetVal = DialogBoxParam(hInst, "Replace",
- hWndMain, lpfnprocReplace, (DWORD)(LPSTR)filename);
- FreeProcInstance(lpfnprocReplace);
- hSaveCursor = SetCursor(hHourGlass);
- ShowCursor(TRUE);
- switch (ReplaceDlgRetVal) {
- case IDM_REPLACE_RENAME:
- renamed = TRUE;
- goto startover;
- case IDM_REPLACE_YES:
- break;
- case IDM_REPLACE_ALL:
- overwrite_all = TRUE;
- overwrite_none = FALSE; /* just to make sure */
- break;
- case IDM_REPLACE_NONE:
- overwrite_none = TRUE;
- overwrite_all = FALSE; /* make sure */
- force_flag = FALSE; /* ditto */
- /* FALL THROUGH, skip */
- case IDM_REPLACE_NO:
- continue;
- }
- #else /* !MSWIN */
- reprompt:
- FPRINTF(stderr, LoadFarString(ReplaceQuery), filename);
- FFLUSH(stderr);
- if (fgets(answerbuf, 9, stdin) == (char *)NULL) {
- FPRINTF(stderr, LoadFarString(AssumeNone));
- FFLUSH(stderr);
- *answerbuf = 'N';
- if (!error_in_archive)
- error_in_archive = 1; /* not extracted: warning */
- }
- switch (*answerbuf) {
- case 'A': /* dangerous option: force caps */
- overwrite_all = TRUE;
- overwrite_none = FALSE; /* just to make sure */
- break;
- case 'r':
- case 'R':
- do {
- FPRINTF(stderr, LoadFarString(NewName));
- FFLUSH(stderr);
- fgets(filename, FILNAMSIZ, stdin);
- /* usually get \n here: better check for it */
- len = strlen(filename);
- if (filename[len-1] == '\n')
- filename[--len] = 0;
- } while (len == 0);
- renamed = TRUE;
- goto startover; /* sorry for a goto */
- case 'y':
- case 'Y':
- break;
- case 'N':
- overwrite_none = TRUE;
- overwrite_all = FALSE; /* make sure */
- force_flag = FALSE; /* ditto */
- /* FALL THROUGH, skip */
- case 'n':
- continue; /* skip file */
- default:
- FPRINTF(stderr, LoadFarString(InvalidResponse),
- *answerbuf); /* warn the user */
- goto reprompt; /* why not another goto? */
- } /* end switch (*answerbuf) */
- #endif /* ?MSWIN */
- } /* end if (query) */
- } /* end if (extracting to disk) */
-
- #ifdef CRYPT
- if (pInfo->encrypted && (error = decrypt()) != PK_COOL) {
- if (error == PK_MEM2) {
- if (error > error_in_archive)
- error_in_archive = error;
- FPRINTF(stderr,
- LoadFarString(SkipCantGetPasswd), filename);
- } else { /* (error == PK_WARN) */
- if (!((tflag && qflag) || (!tflag && !QCOND2)))
- FPRINTF(stderr,
- LoadFarString(SkipIncorrectPasswd), filename);
- ++num_bad_pwd;
- }
- continue; /* go on to next file */
- }
- #endif /* CRYPT */
- disk_full = 0;
- if ((error = extract_or_test_member()) != PK_COOL) {
- if (error > error_in_archive)
- error_in_archive = error; /* ...and keep going */
- if (disk_full > 1) {
- free(crc_32_tab);
- if (fn_matched)
- free(fn_matched);
- if (xn_matched)
- free(xn_matched);
- return error_in_archive; /* (unless disk full) */
- }
- }
- } /* end for-loop (i: files in current block) */
-
-
- /*
- * Jump back to where we were in the central directory, then go and do
- * the next batch of files.
- */
-
- cur_zipfile_bufstart = lseek(zipfd, (LONGINT)cd_bufstart, SEEK_SET);
- read(zipfd, (char *)inbuf, INBUFSIZ); /* were there b4 ==> no error */
- inptr = cd_inptr;
- incnt = cd_incnt;
- ++blknum;
-
- #ifdef TEST
- printf("\ncd_bufstart = %ld (%.8lXh)\n", cd_bufstart, cd_bufstart);
- printf("cur_zipfile_bufstart = %ld (%.8lXh)\n", cur_zipfile_bufstart,
- cur_zipfile_bufstart);
- printf("inptr-inbuf = %d\n", inptr-inbuf);
- printf("incnt = %d\n\n", incnt);
- #endif
-
- } /* end while-loop (blocks of files in central directory) */
-
- /*---------------------------------------------------------------------------
- Check for unmatched filespecs on command line and print warning if any
- found. Free allocated memory.
- ---------------------------------------------------------------------------*/
-
- if (fn_matched) {
- for (i = 0; i < filespecs; ++i)
- if (!fn_matched[i])
- FPRINTF(stderr, LoadFarString(FilenameNotMatched),
- pfnames[i]);
- free(fn_matched);
- }
- if (xn_matched) {
- for (i = 0; i < xfilespecs; ++i)
- if (!xn_matched[i])
- FPRINTF(stderr, LoadFarString(ExclFilenameNotMatched),
- pxnames[i]);
- free(xn_matched);
- }
- free(crc_32_tab);
-
- /*---------------------------------------------------------------------------
- Double-check that we're back at the end-of-central-directory record, and
- print quick summary of results, if we were just testing the archive. We
- send the summary to stdout so that people doing the testing in the back-
- ground and redirecting to a file can just do a "tail" on the output file.
- ---------------------------------------------------------------------------*/
-
- if (readbuf(sig, 4) == 0)
- error_in_archive = PK_EOF;
- if (strncmp(sig, end_central_sig, 4)) { /* just to make sure */
- FPRINTF(stderr, LoadFarString(EndSigMsg)); /* didn't find sig */
- FPRINTF(stderr, LoadFarString(ReportMsg)); /* check binary transfers */
- if (!error_in_archive) /* don't overwrite stronger error */
- error_in_archive = PK_WARN;
- }
- ++filnum; /* initialized to -1, so now zero if no files found */
- if (tflag) {
- int num=filnum - num_bad_pwd;
-
- if (qflag < 2) { /* GRR 930710: was (qflag == 1) */
- if (error_in_archive)
- PRINTF(LoadFarString(ErrorInArchive),
- (error_in_archive == 1)? "warning-" : "", zipfn);
- else if (num == 0)
- PRINTF(LoadFarString(ZeroFilesTested), zipfn);
- else if (process_all_files && (num_skipped+num_bad_pwd == 0))
- PRINTF(LoadFarString(NoErrInCompData), zipfn);
- else
- PRINTF(LoadFarString(NoErrInTestedFiles),
- zipfn, num, (num==1)? "":"s");
- if (num_skipped > 0)
- PRINTF(LoadFarString(FilesSkipped), num_skipped,
- (num_skipped==1)? "":"s");
- #ifdef CRYPT
- if (num_bad_pwd > 0)
- PRINTF(LoadFarString(FilesSkipBadPasswd),
- num_bad_pwd, (num_bad_pwd==1)? "":"s");
- #endif /* CRYPT */
- } else if ((qflag == 0) && !error_in_archive && (num == 0))
- PRINTF(LoadFarString(ZeroFilesTested), zipfn);
- }
-
- /* give warning if files not tested or extracted */
- if ((filnum == 0) && error_in_archive <= PK_WARN)
- error_in_archive = PK_FIND; /* no files found at all */
- else if ((num_skipped > 0) && !error_in_archive)
- error_in_archive = PK_WARN;
- #ifdef CRYPT
- else if ((num_bad_pwd > 0) && !error_in_archive)
- error_in_archive = PK_WARN;
- #endif /* CRYPT */
-
- return error_in_archive;
-
- } /* end function extract_or_test_files() */
-
-
-
-
-
- /**********************/
- /* Function makecrc() */
- /**********************/
-
- static void makecrc()
- /*
- Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
- x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
-
- Polynomials over GF(2) are represented in binary, one bit per coefficient,
- with the lowest powers in the most significant bit. Then adding polynomials
- is just exclusive-or, and multiplying a polynomial by x is a right shift by
- one. If we call the above polynomial p, and represent a byte as the
- polynomial q, also with the lowest power in the most significant bit (so the
- byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
- where a mod b means the remainder after dividing a by b.
-
- This calculation is done using the shift-register method of multiplying and
- taking the remainder. The register is initialized to zero, and for each
- incoming bit, x^32 is added mod p to the register if the bit is a one (where
- x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
- x (which is shifting right by one and adding x^32 mod p if the bit shifted
- out is a one). We start with the highest power (least significant bit) of
- q and repeat for all eight bits of q.
-
- The table is simply the CRC of all possible eight bit values. This is all
- the information needed to generate CRC's on data a byte at a time for all
- combinations of CRC register values and incoming bytes. The table is
- written to stdout as 256 long hexadecimal values in C language format.
- */
- {
- ulg crc; /* crc shift register */
- ulg xor; /* polynomial exclusive-or pattern */
- int i; /* counter for all possible eight bit values */
- int k; /* byte being shifted into crc apparatus */
- /* terms of polynomial defining this crc (except x^32): */
- static uch p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
-
- /* make exclusive-or pattern from polynomial (0xedb88320) */
- xor = 0L;
- for (i = 0; i < sizeof(p)/sizeof(uch); i++)
- xor |= 1L << (31 - p[i]);
-
- crc_32_tab[0] = 0L;
- Trace((stderr, "makecrc(): crc_32_tab[] = {\n 0x%08lxL", crc_32_tab[0]));
- /* the idea to initialize the register with the byte instead of
- * zero was stolen from Haruhiko Okumura's ar002 */
- for (i = 1; i < 256; i++) {
- crc = i;
- for (k = 8; k; k--)
- crc = crc & 1 ? (crc >> 1) ^ xor : crc >> 1;
- crc_32_tab[i] = crc;
- Trace((stderr, i % 5 ? ", 0x%08lxL" : ",\n 0x%08lxL", crc_32_tab[i]));
- }
- Trace((stderr, "\n};\n"));
-
- } /* end function makecrc() */
-
-
-
-
-
- /***************************/
- /* Function store_info() */
- /***************************/
-
- static int store_info() /* return 0 if skipping, 1 if OK */
- {
- #ifdef SFX
- # define UNKN_COMPR \
- (crec.compression_method!=STORED && crec.compression_method!=DEFLATED)
- #else
- # define UNKN_COMPR \
- (crec.compression_method>IMPLODED && crec.compression_method!=DEFLATED)
- #endif
-
- /*---------------------------------------------------------------------------
- Check central directory info for version/compatibility requirements.
- ---------------------------------------------------------------------------*/
-
- pInfo->encrypted = crec.general_purpose_bit_flag & 1; /* bit field */
- pInfo->ExtLocHdr = (crec.general_purpose_bit_flag & 8) == 8;/* bit field */
- pInfo->textfile = crec.internal_file_attributes & 1; /* bit field */
- pInfo->crc = crec.crc32;
- pInfo->compr_size = crec.csize;
-
- switch (aflag) {
- case 0:
- pInfo->textmode = FALSE; /* bit field */
- break;
- case 1:
- pInfo->textmode = pInfo->textfile; /* auto-convert mode */
- break;
- default: /* case 2: */
- pInfo->textmode = TRUE;
- break;
- }
-
- if (crec.version_needed_to_extract[1] == VMS_) {
- if (crec.version_needed_to_extract[0] > VMS_UNZIP_VERSION) {
- if (!((tflag && qflag) || (!tflag && !QCOND2)))
- FPRINTF(stderr, LoadFarString(VersionMsg), filename, "VMS",
- crec.version_needed_to_extract[0] / 10,
- crec.version_needed_to_extract[0] % 10,
- VMS_UNZIP_VERSION / 10, VMS_UNZIP_VERSION % 10);
- return 0;
- }
- #ifndef VMS /* won't be able to use extra field, but still have data */
- else if (!tflag && !force_flag) { /* if forcing, extract regardless */
- FPRINTF(stderr, LoadFarString(VMSFormat), filename);
- FFLUSH(stderr);
- fgets(answerbuf, 9, stdin);
- if ((*answerbuf != 'y') && (*answerbuf != 'Y'))
- return 0;
- }
- #endif /* !VMS */
- /* usual file type: don't need VMS to extract */
- } else if (crec.version_needed_to_extract[0] > UNZIP_VERSION) {
- if (!((tflag && qflag) || (!tflag && !QCOND2)))
- FPRINTF(stderr, LoadFarString(VersionMsg), filename, "PK",
- crec.version_needed_to_extract[0] / 10,
- crec.version_needed_to_extract[0] % 10,
- UNZIP_VERSION / 10, UNZIP_VERSION % 10);
- return 0;
- }
-
- if UNKN_COMPR {
- if (!((tflag && qflag) || (!tflag && !QCOND2)))
- FPRINTF(stderr, LoadFarString(ComprMsg), filename,
- crec.compression_method);
- return 0;
- }
- #ifndef CRYPT
- if (pInfo->encrypted) {
- if (!((tflag && qflag) || (!tflag && !QCOND2)))
- FPRINTF(stderr, LoadFarString(SkipEncrypted), filename);
- return 0;
- }
- #endif /* !CRYPT */
-
- /* map whatever file attributes we have into the local format */
- mapattr(); /* GRR: worry about return value later */
-
- pInfo->offset = (long) crec.relative_offset_local_header;
- return 1;
-
- } /* end function store_info() */
-
-
-
-
-
- /***************************************/
- /* Function extract_or_test_member() */
- /***************************************/
-
- static int extract_or_test_member() /* return PK-type error code */
- {
- char *nul="[empty] ", *txt="[text] ", *bin="[binary]";
- register int b;
- int r, error=PK_COOL;
-
-
-
- /*---------------------------------------------------------------------------
- Initialize variables, buffers, etc.
- ---------------------------------------------------------------------------*/
-
- bits_left = 0; /* unreduce and unshrink only */
- bitbuf = 0L; /* unreduce and unshrink only */
- zipeof = 0; /* unreduce and unshrink only */
- newfile = TRUE;
- crc32val = 0xFFFFFFFFL;
-
- #ifdef SYMLINKS
- /* if file came from Unix and is a symbolic link and we are extracting
- * to disk, prepare to restore the link */
- if (S_ISLNK(pInfo->file_attr) && (pInfo->hostnum == UNIX_) && !tflag &&
- !cflag && (lrec.ucsize > 0))
- symlnk = TRUE;
- else
- symlnk = FALSE;
- #endif /* SYMLINKS */
-
- if (tflag) {
- if (!qflag) {
- FPRINTF(stdout, LoadFarString(ExtractMsg), "test", filename, "", "");
- fflush(stdout);
- }
- } else {
- if (cflag) {
- outfile = stdout;
- #ifdef DOS_NT_OS2
- setmode(fileno(outfile), O_BINARY);
- # define NEWLINE "\r\n"
- #else
- # define NEWLINE "\n"
- #endif
- #ifdef VMS
- if (open_outfile()) /* VMS: required even for stdout! */
- return PK_DISK;
- #endif
- } else if (open_outfile())
- return PK_DISK;
- }
-
- /*---------------------------------------------------------------------------
- Unpack the file.
- ---------------------------------------------------------------------------*/
-
- switch (lrec.compression_method) {
- case STORED:
- if (!tflag && QCOND2) {
- #ifdef SYMLINKS
- if (symlnk) /* can also be deflated, but rarer... */
- FPRINTF(stdout, LoadFarString(ExtractMsg), "link", filename,
- "", "");
- else
- #endif /* SYMLINKS */
- FPRINTF(stdout, LoadFarString(ExtractMsg), "extract", filename,
- (aflag != 1 /* && pInfo->textfile == pInfo->textmode */ )? ""
- : (lrec.ucsize == 0L? nul : (pInfo->textfile? txt : bin)),
- cflag? NEWLINE : "");
- fflush(stdout);
- }
- outptr = slide;
- outcnt = 0L;
- while ((b = NEXTBYTE) != EOF && !disk_full) {
- *outptr++ = (uch)b;
- if (++outcnt == WSIZE) {
- flush(slide, outcnt, 0);
- outptr = slide;
- outcnt = 0L;
- }
- }
- if (outcnt) /* flush final (partial) buffer */
- flush(slide, outcnt, 0);
- break;
-
- #ifndef SFX
- case SHRUNK:
- if (!tflag && QCOND2) {
- FPRINTF(stdout, LoadFarString(ExtractMsg),
- LoadFarStringSmall(Unshrink), filename,
- (aflag != 1 /* && pInfo->textfile == pInfo->textmode */ )? ""
- : (pInfo->textfile? txt : bin), cflag? NEWLINE : "");
- fflush(stdout);
- }
- if ((r = unshrink()) != PK_COOL) {
- if ((tflag && qflag) || (!tflag && !QCOND2))
- FPRINTF(stderr, LoadFarStringSmall(ErrUnzipFile),
- LoadFarString(NotEnoughMem),
- LoadFarStringSmall2(Unshrink),
- filename);
- else
- FPRINTF(stderr, LoadFarStringSmall(ErrUnzipNoFile),
- LoadFarString(NotEnoughMem),
- LoadFarStringSmall2(Unshrink));
- error = r;
- }
- break;
-
- case REDUCED1:
- case REDUCED2:
- case REDUCED3:
- case REDUCED4:
- if (!tflag && QCOND2) {
- FPRINTF(stdout, LoadFarString(ExtractMsg), "unreduc", filename,
- (aflag != 1 /* && pInfo->textfile == pInfo->textmode */ )? ""
- : (pInfo->textfile? txt : bin), cflag? NEWLINE : "");
- fflush(stdout);
- }
- unreduce();
- break;
-
- case IMPLODED:
- if (!tflag && QCOND2) {
- FPRINTF(stdout, LoadFarString(ExtractMsg), "explod", filename,
- (aflag != 1 /* && pInfo->textfile == pInfo->textmode */ )? ""
- : (pInfo->textfile? txt : bin), cflag? NEWLINE : "");
- fflush(stdout);
- }
- if (((r = explode()) != 0) && (r != 5)) { /* treat 5 specially */
- if ((tflag && qflag) || (!tflag && !QCOND2))
- FPRINTF(stderr, LoadFarStringSmall(ErrUnzipFile), r == 3?
- LoadFarString(NotEnoughMem) :
- LoadFarString(InvalidComprData),
- LoadFarStringSmall2(Explode), filename);
- else
- FPRINTF(stderr, LoadFarStringSmall(ErrUnzipNoFile), r == 3?
- LoadFarString(NotEnoughMem) :
- LoadFarString(InvalidComprData),
- LoadFarStringSmall2(Explode));
- error = (r == 3)? PK_MEM3 : PK_ERR;
- }
- if (r == 5) {
- int warning = ((ulg)used_csize <= lrec.csize);
-
- if ((tflag && qflag) || (!tflag && !QCOND2))
- FPRINTF(stderr, LoadFarString(LengthMsg), "", warning?
- "warning":"error", used_csize, lrec.ucsize, warning?
- " ":"", lrec.csize, " [", filename, "]");
- else
- FPRINTF(stderr, LoadFarString(LengthMsg), "\n", warning?
- "warning":"error", used_csize, lrec.ucsize, warning?
- " ":"", lrec.csize, "", "", ".");
- error = warning? PK_WARN : PK_ERR;
- }
- break;
- #endif /* !SFX */
-
- case DEFLATED:
- if (!tflag && QCOND2) {
- FPRINTF(stdout, LoadFarString(ExtractMsg), "inflat", filename,
- (aflag != 1 /* && pInfo->textfile == pInfo->textmode */ )? ""
- : (pInfo->textfile? txt : bin), cflag? NEWLINE : "");
- fflush(stdout);
- }
- if ((r = inflate()) != 0) {
- if ((tflag && qflag) || (!tflag && !QCOND2))
- FPRINTF(stderr, LoadFarStringSmall(ErrUnzipFile), r == 3?
- LoadFarString(NotEnoughMem) :
- LoadFarString(InvalidComprData),
- LoadFarStringSmall2(Inflate), filename);
- else
- FPRINTF(stderr, LoadFarStringSmall(ErrUnzipNoFile), r == 3?
- LoadFarString(NotEnoughMem) :
- LoadFarString(InvalidComprData),
- LoadFarStringSmall2(Inflate));
- error = (r == 3)? PK_MEM3 : PK_ERR;
- }
- break;
-
- default: /* should never get to this point */
- FPRINTF(stderr, LoadFarString(FileUnknownCompMethod), filename);
- /* close and delete file before return? */
- return PK_WARN;
-
- } /* end switch (compression method) */
-
- if (disk_full) { /* set by flush() */
- if (disk_full > 1)
- return PK_DISK;
- error = PK_WARN;
- }
-
- /*---------------------------------------------------------------------------
- Close the file and set its date and time (not necessarily in that order),
- and make sure the CRC checked out OK. Logical-AND the CRC for 64-bit
- machines (redundant on 32-bit machines).
- ---------------------------------------------------------------------------*/
-
- #ifdef VMS /* VMS: required even for stdout! (final flush) */
- if (!tflag) /* don't close NULL file */
- #else
- if (!tflag && !cflag) /* don't close NULL file or stdout */
- #endif
- close_outfile();
-
- if (error > PK_WARN) /* don't print redundant CRC error if error already */
- return error;
-
- if ((crc32val = ((~crc32val) & 0xFFFFFFFFL)) != lrec.crc32) {
- /* if quiet enough, we haven't output the filename yet: do it */
- if ((tflag && qflag) || (!tflag && !QCOND2))
- FPRINTF(stderr, "%-22s ", filename);
- FPRINTF(stderr, LoadFarString(BadCRC), crc32val, lrec.crc32);
- #ifdef CRYPT
- if (pInfo->encrypted)
- FPRINTF(stderr, LoadFarString(MaybeBadPasswd));
- #endif
- FFLUSH(stderr);
- error = PK_ERR;
- } else if (tflag) {
- if (!qflag)
- FPRINTF(stdout, " OK\n");
- } else {
- if (QCOND2 && !error)
- FPRINTF(stdout, "\n"); /* GRR: is stdout reset to text mode yet? */
- }
-
- return error;
-
- } /* end function extract_or_test_member() */
-
-
-
-
-
- /***************************/
- /* Function memextract() */
- /***************************/
-
- int memextract(tgt, tgtsize, src, srcsize) /* extract compressed extra */
- uch *tgt, *src; /* field block; return PK- */
- ulg tgtsize, srcsize; /* type error level */
- {
- uch *old_inptr=inptr;
- int old_incnt=incnt, r, error=PK_OK;
- ush method;
- ulg extra_field_crc;
-
-
- method = makeword(src);
- extra_field_crc = makelong(src+2);
-
- /* compressed extra field exists completely in memory at this location: */
- inptr = src + 2 + 4; /* method and extra_field_crc */
- incnt = (int)(csize = (long)(srcsize - (2 + 4)));
- mem_mode = TRUE;
-
- switch (method) {
- case STORED:
- memcpy((char *)tgt, (char *)inptr, (extent)incnt);
- outcnt = csize; /* for CRC calculation */
- break;
- case DEFLATED:
- if ((r = inflate()) != 0) {
- FPRINTF(stderr, LoadFarStringSmall(ErrUnzipNoFile), r == 3?
- LoadFarString(NotEnoughMem) :
- LoadFarString(InvalidComprData),
- LoadFarStringSmall2(Inflate));
- error = (r == 3)? PK_MEM3 : PK_ERR;
- }
- if (outcnt == 0L) /* inflate's final FLUSH sets outcnt */
- break;
- if (outcnt <= tgtsize)
- memcpy((char *)tgt, (char *)slide, (extent)outcnt);
- else
- error = PK_MEM4; /* GRR: should be passed up via SetEAs() */
- break;
- default:
- FPRINTF(stderr, LoadFarString(UnsupportedExtraField));
- error = PK_WARN; /* GRR: should be passed on up via SetEAs() */
- break;
- }
-
- inptr = old_inptr;
- incnt = old_incnt;
- mem_mode = FALSE;
-
- if (!error) {
- register ulg crcval = 0xFFFFFFFFL;
- register ulg n = outcnt; /* or tgtsize?? */
- register uch *p = tgt;
-
- while (n--)
- crcval = crc_32_tab[((uch)crcval ^ (*p++)) & 0xff] ^ (crcval >> 8);
- crcval = (~crcval) & 0xFFFFFFFFL;
-
- if (crcval != extra_field_crc) {
- FPRINTF(stderr, LoadFarString(BadExtraFieldCRC),
- zipfn, crcval, extra_field_crc);
- error = PK_WARN;
- }
- }
- return error;
-
- } /* end function memextract() */
-