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process.c
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process.c
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/*
Copyright (c) 1990-2009 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2009-Jan-02 or later
(the contents of which are also included in unzip.h) for terms of use.
If, for some reason, all these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
*/
/*---------------------------------------------------------------------------
process.c
This file contains the top-level routines for processing multiple zipfiles.
Contains: process_zipfiles()
free_G_buffers()
do_seekable()
file_size()
rec_find()
find_ecrec64()
find_ecrec()
process_zip_cmmnt()
process_cdir_file_hdr()
get_cdir_ent()
process_local_file_hdr()
getZip64Data()
ef_scan_for_izux()
getRISCOSexfield()
---------------------------------------------------------------------------*/
#define UNZIP_INTERNAL
#include "unzip.h"
#ifdef WINDLL
# ifdef POCKET_UNZIP
# include "wince/intrface.h"
# else
# include "windll/windll.h"
# endif
#endif
#if defined(DYNALLOC_CRCTAB) || defined(UNICODE_SUPPORT)
# include "crc32.h"
#endif
static int do_seekable (Uz_Globs *pG, int lastchance);
#ifdef DO_SAFECHECK_2GB
static zoff_t file_size (FILE *file);
#endif /* DO_SAFECHECK_2GB */
static int rec_find (Uz_Globs *pG, zoff_t, char *, int);
static int find_ecrec64 (Uz_Globs *pG, zoff_t searchlen);
static int find_ecrec (Uz_Globs *pG, zoff_t searchlen);
static int process_zip_cmmnt (Uz_Globs *pG);
static int get_cdir_ent (Uz_Globs *pG);
#ifdef IZ_HAVE_UXUIDGID
static int read_ux3_value OF((const uch *dbuf, unsigned uidgid_sz,
ulg *p_uidgid));
#endif /* IZ_HAVE_UXUIDGID */
static const char CannotAllocateBuffers[] =
"error: cannot allocate unzip buffers\n";
/* process_zipfiles() strings */
# if (defined(IZ_CHECK_TZ) && defined(USE_EF_UT_TIME))
static const char WarnInvalidTZ[] =
"Warning: TZ environment variable not found, cannot use UTC times!!\n";
# endif
# if !(defined(UNIX) || defined(AMIGA))
static const char CannotFindWildcardMatch[] =
"%s: cannot find any matches for wildcard specification \"%s\".\n";
# endif /* !(UNIX || AMIGA) */
static const char FilesProcessOK[] =
"%d archive%s successfully processed.\n";
static const char ArchiveWarning[] =
"%d archive%s had warnings but no fatal errors.\n";
static const char ArchiveFatalError[] =
"%d archive%s had fatal errors.\n";
static const char FileHadNoZipfileDir[] =
"%d file%s had no zipfile directory.\n";
static const char ZipfileWasDir[] = "1 \"zipfile\" was a directory.\n";
static const char ManyZipfilesWereDir[] =
"%d \"zipfiles\" were directories.\n";
static const char NoZipfileFound[] = "No zipfiles found.\n";
/* do_seekable() strings */
# ifdef UNIX
static const char CannotFindZipfileDirMsg[] =
"%s: cannot find zipfile directory in one of %s or\n\
%s%s.zip, and cannot find %s, period.\n";
static const char CannotFindEitherZipfile[] =
"%s: cannot find or open %s, %s.zip or %s.\n";
# else /* !UNIX */
static const char CannotFindZipfileDirMsg[] =
"%s: cannot find zipfile directory in %s,\n\
%sand cannot find %s, period.\n";
static const char CannotFindEitherZipfile[] =
"%s: cannot find either %s or %s.\n";
# endif /* ?UNIX */
extern const char Zipnfo[]; /* in unzip.c */
#ifndef WINDLL
static const char Unzip[] = "unzip";
#else
static const char Unzip[] = "UnZip DLL";
#endif
#ifdef DO_SAFECHECK_2GB
static const char ZipfileTooBig[] =
"Trying to read large file (> 2 GiB) without large file support\n";
#endif /* DO_SAFECHECK_2GB */
static const char MaybeExe[] =
"note: %s may be a plain executable, not an archive\n";
static const char CentDirNotInZipMsg[] = "\n\
[%s]:\n\
Zipfile is disk %lu of a multi-disk archive, and this is not the disk on\n\
which the central zipfile directory begins (disk %lu).\n";
static const char EndCentDirBogus[] =
"\nwarning [%s]: end-of-central-directory record claims this\n\
is disk %lu but that the central directory starts on disk %lu; this is a\n\
contradiction. Attempting to process anyway.\n";
# ifdef NO_MULTIPART
static const char NoMultiDiskArcSupport[] =
"\nerror [%s]: zipfile is part of multi-disk archive\n\
(sorry, not yet supported).\n";
static const char MaybePakBug[] = "warning [%s]:\
zipfile claims to be 2nd disk of a 2-part archive;\n\
attempting to process anyway. If no further errors occur, this archive\n\
was probably created by PAK v2.51 or earlier. This bug was reported to\n\
NoGate in March 1991 and was supposed to have been fixed by mid-1991; as\n\
of mid-1992 it still hadn't been. (If further errors do occur, archive\n\
was probably created by PKZIP 2.04c or later; UnZip does not yet support\n\
multi-part archives.)\n";
# else
static const char MaybePakBug[] = "warning [%s]:\
zipfile claims to be last disk of a multi-part archive;\n\
attempting to process anyway, assuming all parts have been concatenated\n\
together in order. Expect \"errors\" and warnings...true multi-part support\
\n doesn't exist yet (coming soon).\n";
# endif
static const char ExtraBytesAtStart[] =
"warning [%s]: %s extra byte%s at beginning or within zipfile\n\
(attempting to process anyway)\n";
#if ((!defined(WINDLL)) || !defined(NO_ZIPINFO))
static const char LogInitline[] = "Archive: %s\n";
#endif
static const char MissingBytes[] =
"error [%s]: missing %s bytes in zipfile\n\
(attempting to process anyway)\n";
static const char NullCentDirOffset[] =
"error [%s]: NULL central directory offset\n\
(attempting to process anyway)\n";
static const char ZipfileEmpty[] = "warning [%s]: zipfile is empty\n";
static const char CentDirStartNotFound[] =
"error [%s]: start of central directory not found;\n\
zipfile corrupt.\n%s";
static const char Cent64EndSigSearchErr[] =
"fatal error: read failure while seeking for End-of-centdir-64 signature.\n\
This zipfile is corrupt.\n";
static const char Cent64EndSigSearchOff[] =
"error: End-of-centdir-64 signature not where expected (prepended bytes?)\n\
(attempting to process anyway)\n";
static const char CentDirTooLong[] =
"error [%s]: reported length of central directory is\n\
%s bytes too long (Atari STZip zipfile? J.H.Holm ZIPSPLIT 1.1\n\
zipfile?). Compensating...\n";
static const char CentDirEndSigNotFound[] = "\
End-of-central-directory signature not found. Either this file is not\n\
a zipfile, or it constitutes one disk of a multi-part archive. In the\n\
latter case the central directory and zipfile comment will be found on\n\
the last disk(s) of this archive.\n";
#ifdef TIMESTAMP
static const char ZipTimeStampFailed[] =
"warning: cannot set time for %s\n";
static const char ZipTimeStampSuccess[] =
"Updated time stamp for %s.\n";
#endif
static const char ZipfileCommTrunc1[] =
"\ncaution: zipfile comment truncated\n";
#ifndef NO_ZIPINFO
static const char NoZipfileComment[] =
"There is no zipfile comment.\n";
static const char ZipfileCommentDesc[] =
"The zipfile comment is %u bytes long and contains the following text:\n";
static const char ZipfileCommBegin[] =
"======================== zipfile comment begins\
==========================\n";
static const char ZipfileCommEnd[] =
"========================= zipfile comment ends\
===========================\n";
static const char ZipfileCommTrunc2[] =
"\n The zipfile comment is truncated.\n";
#endif /* !NO_ZIPINFO */
#ifdef UNICODE_SUPPORT
static const char UnicodeVersionError[] =
"\nwarning: Unicode Path version > 1\n";
static const char UnicodeMismatchError[] =
"\nwarning: Unicode Path checksum invalid\n";
#endif
/*******************************/
/* Function process_zipfiles() */
/*******************************/
int
process_zipfiles ( /* return PK-type error code */
Uz_Globs *pG
)
{
char *lastzipfn = (char *)NULL;
int NumWinFiles, NumLoseFiles, NumWarnFiles;
int NumMissDirs, NumMissFiles;
int error=0, error_in_archive=0;
/*---------------------------------------------------------------------------
Start by allocating buffers and (re)constructing the various PK signature
strings.
---------------------------------------------------------------------------*/
(*(Uz_Globs *)pG).inbuf = (uch *)malloc(INBUFSIZ + 4); /* 4 extra for hold[] (below) */
(*(Uz_Globs *)pG).outbuf = (uch *)malloc(OUTBUFSIZ + 1); /* 1 extra for string term. */
if (((*(Uz_Globs *)pG).inbuf == (uch *)NULL) || ((*(Uz_Globs *)pG).outbuf == (uch *)NULL)) {
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotAllocateBuffers)));
return(PK_MEM);
}
(*(Uz_Globs *)pG).hold = (*(Uz_Globs *)pG).inbuf + INBUFSIZ; /* to check for boundary-spanning sigs */
#if 0 /* CRC_32_TAB has been NULLified by CONSTRUCTGLOBALS !!!! */
/* allocate the CRC table later when we know we can read zipfile data */
CRC_32_TAB = NULL;
#endif /* 0 */
/* finish up initialization of magic signature strings */
local_hdr_sig[0] /* = extd_local_sig[0] */ = /* ASCII 'P', */
central_hdr_sig[0] = end_central_sig[0] = /* not EBCDIC */
end_centloc64_sig[0] = end_central64_sig[0] = 0x50;
local_hdr_sig[1] /* = extd_local_sig[1] */ = /* ASCII 'K', */
central_hdr_sig[1] = end_central_sig[1] = /* not EBCDIC */
end_centloc64_sig[1] = end_central64_sig[1] = 0x4B;
/*---------------------------------------------------------------------------
Make sure timezone info is set correctly; localtime() returns GMT on some
OSes (e.g., Solaris 2.x) if this isn't done first. The ifdefs around
tzset() were initially copied from dos_to_unix_time() in fileio.c. They
may still be too strict; any listed OS that supplies tzset(), regardless
of whether the function does anything, should be removed from the ifdefs.
---------------------------------------------------------------------------*/
#if (defined(WIN32) && defined(USE_EF_UT_TIME))
/* For the Win32 environment, we may have to "prepare" the environment
prior to the tzset() call, to work around tzset() implementation bugs.
*/
iz_w32_prepareTZenv();
#endif
#if (defined(IZ_CHECK_TZ) && defined(USE_EF_UT_TIME))
# ifndef VALID_TIMEZONE
# define VALID_TIMEZONE(tmp) \
(((tmp = getenv("TZ")) != NULL) && (*tmp != '\0'))
# endif
{
char *p;
(*(Uz_Globs *)pG).tz_is_valid = VALID_TIMEZONE(p);
# ifndef SFX
if (!(*(Uz_Globs *)pG).tz_is_valid) {
Info(slide, 0x401, ((char *)slide, LoadFarString(WarnInvalidTZ)));
error_in_archive = error = PK_WARN;
}
# endif /* !SFX */
}
#endif /* IZ_CHECK_TZ && USE_EF_UT_TIME */
tzset();
/* Initialize UnZip's built-in pseudo hard-coded "ISO <--> OEM" translation,
depending on the detected codepage setup. */
#ifdef NEED_ISO_OEM_INIT
prepare_ISO_OEM_translat(pG);
#endif
/*---------------------------------------------------------------------------
Initialize the internal flag holding the mode of processing "overwrite
existing file" cases. We do not use the calling interface flags directly
because the overwrite mode may be changed by user interaction while
processing archive files. Such a change should not affect the option
settings as passed through the DLL calling interface.
In case of conflicting options, the 'safer' flag uO.overwrite_none takes
precedence.
---------------------------------------------------------------------------*/
(*(Uz_Globs *)pG).overwrite_mode = (uO.overwrite_none ? OVERWRT_NEVER :
(uO.overwrite_all ? OVERWRT_ALWAYS : OVERWRT_QUERY));
/*---------------------------------------------------------------------------
Match (possible) wildcard zipfile specification with existing files and
attempt to process each. If no hits, try again after appending ".zip"
suffix. If still no luck, give up.
---------------------------------------------------------------------------*/
NumWinFiles = NumLoseFiles = NumWarnFiles = 0;
NumMissDirs = NumMissFiles = 0;
while (((*(Uz_Globs *)pG).zipfn = do_wild(pG, (*(Uz_Globs *)pG).wildzipfn)) != (char *)NULL) {
Trace((stderr, "do_wild( %s ) returns %s\n", (*(Uz_Globs *)pG).wildzipfn, (*(Uz_Globs *)pG).zipfn));
lastzipfn = (*(Uz_Globs *)pG).zipfn;
/* print a blank line between the output of different zipfiles */
if (!uO.qflag && error != PK_NOZIP && error != IZ_DIR
#ifdef TIMESTAMP
&& (!uO.T_flag || uO.zipinfo_mode)
#endif
&& (NumWinFiles+NumLoseFiles+NumWarnFiles+NumMissFiles) > 0)
(*(*(Uz_Globs *)pG).message)((void *)&(*(Uz_Globs *)pG), (uch *)"\n", 1L, 0);
if ((error = do_seekable(pG, 0)) == PK_WARN)
++NumWarnFiles;
else if (error == IZ_DIR)
++NumMissDirs;
else if (error == PK_NOZIP)
++NumMissFiles;
else if (error != PK_OK)
++NumLoseFiles;
else
++NumWinFiles;
Trace((stderr, "do_seekable(0) returns %d\n", error));
if (error != IZ_DIR && error > error_in_archive)
error_in_archive = error;
#ifdef WINDLL
if (error == IZ_CTRLC) {
free_G_buffers(pG);
return error;
}
#endif
} /* end while-loop (wildcard zipfiles) */
if ((NumWinFiles + NumWarnFiles + NumLoseFiles) == 0 &&
(NumMissDirs + NumMissFiles) == 1 && lastzipfn != (char *)NULL)
{
#if (!defined(UNIX) && !defined(AMIGA)) /* filenames with wildcard characters */
if (iswild((*(Uz_Globs *)pG).wildzipfn)) {
if (iswild(lastzipfn)) {
NumMissDirs = NumMissFiles = 0;
error_in_archive = PK_COOL;
if (uO.qflag < 3)
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindWildcardMatch),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
(*(Uz_Globs *)pG).wildzipfn));
}
} else
#endif
{
#ifndef VMS
/* 2004-11-24 SMS.
* VMS has already tried a default file type of ".zip" in
* do_wild(), so adding ZSUFX here only causes confusion by
* corrupting some valid (though nonexistent) file names.
* Complaining below about "fred;4.zip" is unlikely to be
* helpful to the victim.
*/
/* 2005-08-14 Chr. Spieler
* Although we already "know" the failure result, we call
* do_seekable() again with the same zipfile name (and the
* lastchance flag set), just to trigger the error report...
*/
#if defined(UNIX) || defined(QDOS)
char *p =
#endif
strcpy(lastzipfn + strlen(lastzipfn), ZSUFX);
#endif /* !VMS */
(*(Uz_Globs *)pG).zipfn = lastzipfn;
NumMissDirs = NumMissFiles = 0;
error_in_archive = PK_COOL;
#if defined(UNIX)
/* only Unix has case-sensitive filesystems */
/* Well FlexOS (sometimes) also has them, but support is per media */
/* and a pig to code for, so treat as case insensitive for now */
/* we do this under QDOS to check for .zip as well as _zip */
if ((error = do_seekable(pG, 0)) == PK_NOZIP || error == IZ_DIR) {
if (error == IZ_DIR)
++NumMissDirs;
strcpy(p, ALT_ZSUFX);
error = do_seekable(pG, 1);
}
#else
error = do_seekable(pG, 1);
#endif
Trace((stderr, "do_seekable(1) returns %d\n", error));
switch (error) {
case PK_WARN:
++NumWarnFiles;
break;
case IZ_DIR:
++NumMissDirs;
error = PK_NOZIP;
break;
case PK_NOZIP:
/* increment again => bug:
"1 file had no zipfile directory." */
/* ++NumMissFiles */ ;
break;
default:
if (error)
++NumLoseFiles;
else
++NumWinFiles;
break;
}
if (error > error_in_archive)
error_in_archive = error;
#ifdef WINDLL
if (error == IZ_CTRLC) {
free_G_buffers(pG);
return error;
}
#endif
}
}
/*---------------------------------------------------------------------------
Print summary of all zipfiles, assuming zipfile spec was a wildcard (no
need for a summary if just one zipfile).
---------------------------------------------------------------------------*/
if (iswild((*(Uz_Globs *)pG).wildzipfn) && uO.qflag < 3
#ifdef TIMESTAMP
&& !(uO.T_flag && !uO.zipinfo_mode && uO.qflag > 1)
#endif
)
{
if ((NumMissFiles + NumLoseFiles + NumWarnFiles > 0 || NumWinFiles != 1)
#ifdef TIMESTAMP
&& !(uO.T_flag && !uO.zipinfo_mode && uO.qflag)
#endif
&& !(uO.tflag && uO.qflag > 1))
(*(*(Uz_Globs *)pG).message)((void *)&(*(Uz_Globs *)pG), (uch *)"\n", 1L, 0x401);
if ((NumWinFiles > 1) ||
(NumWinFiles == 1 &&
NumMissDirs + NumMissFiles + NumLoseFiles + NumWarnFiles > 0))
Info(slide, 0x401, ((char *)slide, LoadFarString(FilesProcessOK),
NumWinFiles, (NumWinFiles == 1)? " was" : "s were"));
if (NumWarnFiles > 0)
Info(slide, 0x401, ((char *)slide, LoadFarString(ArchiveWarning),
NumWarnFiles, (NumWarnFiles == 1)? "" : "s"));
if (NumLoseFiles > 0)
Info(slide, 0x401, ((char *)slide, LoadFarString(ArchiveFatalError),
NumLoseFiles, (NumLoseFiles == 1)? "" : "s"));
if (NumMissFiles > 0)
Info(slide, 0x401, ((char *)slide,
LoadFarString(FileHadNoZipfileDir), NumMissFiles,
(NumMissFiles == 1)? "" : "s"));
if (NumMissDirs == 1)
Info(slide, 0x401, ((char *)slide, LoadFarString(ZipfileWasDir)));
else if (NumMissDirs > 0)
Info(slide, 0x401, ((char *)slide,
LoadFarString(ManyZipfilesWereDir), NumMissDirs));
if (NumWinFiles + NumLoseFiles + NumWarnFiles == 0)
Info(slide, 0x401, ((char *)slide, LoadFarString(NoZipfileFound)));
}
/* free allocated memory */
free_G_buffers(pG);
return error_in_archive;
} /* end function process_zipfiles() */
/*****************************/
/* Function free_G_buffers() */
/*****************************/
void
free_G_buffers ( /* releases all memory allocated in global vars */
Uz_Globs *pG
)
{
unsigned i;
#ifdef SYSTEM_SPECIFIC_DTOR
SYSTEM_SPECIFIC_DTOR(pG);
#endif
inflate_free(pG);
checkdir(pG, (char *)NULL, END);
#ifdef DYNALLOC_CRCTAB
if (CRC_32_TAB) {
free_crc_table();
CRC_32_TAB = NULL;
}
#endif
if ((*(Uz_Globs *)pG).key != (char *)NULL) {
free((*(Uz_Globs *)pG).key);
(*(Uz_Globs *)pG).key = (char *)NULL;
}
if ((*(Uz_Globs *)pG).extra_field != (uch *)NULL) {
free((*(Uz_Globs *)pG).extra_field);
(*(Uz_Globs *)pG).extra_field = (uch *)NULL;
}
#if (!defined(VMS) && !defined(SMALL_MEM))
/* VMS uses its own buffer scheme for textmode flush() */
if ((*(Uz_Globs *)pG).outbuf2) {
free((*(Uz_Globs *)pG).outbuf2); /* malloc'd ONLY if unshrink and -a */
(*(Uz_Globs *)pG).outbuf2 = (uch *)NULL;
}
#endif
if ((*(Uz_Globs *)pG).outbuf)
free((*(Uz_Globs *)pG).outbuf);
if ((*(Uz_Globs *)pG).inbuf)
free((*(Uz_Globs *)pG).inbuf);
(*(Uz_Globs *)pG).inbuf = (*(Uz_Globs *)pG).outbuf = (uch *)NULL;
#ifdef UNICODE_SUPPORT
if ((*(Uz_Globs *)pG).filename_full) {
free((*(Uz_Globs *)pG).filename_full);
(*(Uz_Globs *)pG).filename_full = (char *)NULL;
(*(Uz_Globs *)pG).fnfull_bufsize = 0;
}
#endif /* UNICODE_SUPPORT */
for (i = 0; i < DIR_BLKSIZ; i++) {
if ((*(Uz_Globs *)pG).info[i].cfilname != (char *)NULL) {
free((*(Uz_Globs *)pG).info[i].cfilname);
(*(Uz_Globs *)pG).info[i].cfilname = (char *)NULL;
}
}
#ifdef MALLOC_WORK
if ((*(Uz_Globs *)pG).area.Slide) {
free((*(Uz_Globs *)pG).area.Slide);
(*(Uz_Globs *)pG).area.Slide = (uch *)NULL;
}
#endif
} /* end function free_G_buffers() */
/**************************/
/* Function do_seekable() */
/**************************/
static int
do_seekable ( /* return PK-type error code */
Uz_Globs *pG,
int lastchance
)
{
/* static int no_ecrec = FALSE; SKM: moved to globals.h */
int maybe_exe=FALSE;
int too_weird_to_continue=FALSE;
#ifdef TIMESTAMP
time_t uxstamp;
ulg nmember = 0L;
#endif
int error=0, error_in_archive;
/*---------------------------------------------------------------------------
Open the zipfile for reading in BINARY mode to prevent CR/LF translation,
which would corrupt the bit streams.
---------------------------------------------------------------------------*/
if (SSTAT((*(Uz_Globs *)pG).zipfn, &(*(Uz_Globs *)pG).statbuf) ||
(error = S_ISDIR((*(Uz_Globs *)pG).statbuf.st_mode)) != 0)
{
if (lastchance && (uO.qflag < 3)) {
#if defined(UNIX)
if ((*(Uz_Globs *)pG).no_ecrec)
Info(slide, 1, ((char *)slide,
LoadFarString(CannotFindZipfileDirMsg),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
(*(Uz_Globs *)pG).wildzipfn, uO.zipinfo_mode? " " : "", (*(Uz_Globs *)pG).wildzipfn,
(*(Uz_Globs *)pG).zipfn));
else
Info(slide, 1, ((char *)slide,
LoadFarString(CannotFindEitherZipfile),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
(*(Uz_Globs *)pG).wildzipfn, (*(Uz_Globs *)pG).wildzipfn, (*(Uz_Globs *)pG).zipfn));
#else /* !(UNIX || QDOS) */
if ((*(Uz_Globs *)pG).no_ecrec)
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindZipfileDirMsg),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
(*(Uz_Globs *)pG).wildzipfn, uO.zipinfo_mode? " " : "", (*(Uz_Globs *)pG).zipfn));
else
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindEitherZipfile),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
(*(Uz_Globs *)pG).wildzipfn, (*(Uz_Globs *)pG).zipfn));
#endif /* ?(UNIX ) */
}
return error? IZ_DIR : PK_NOZIP;
}
(*(Uz_Globs *)pG).ziplen = (*(Uz_Globs *)pG).statbuf.st_size;
#if defined(UNIX) || defined(DOS_OS2_W32) || defined(THEOS)
if ((*(Uz_Globs *)pG).statbuf.st_mode & S_IEXEC) /* no extension on Unix exes: might */
maybe_exe = TRUE; /* find unzip, not unzip.zip; etc. */
#endif
if (open_input_file(pG)) /* this should never happen, given */
return PK_NOZIP; /* the stat() test above, but... */
#ifdef DO_SAFECHECK_2GB
/* Need more care: Do not trust the size returned by stat() but
determine it by reading beyond the end of the file. */
(*(Uz_Globs *)pG).ziplen = file_size((*(Uz_Globs *)pG).zipfd);
if ((*(Uz_Globs *)pG).ziplen == EOF) {
Info(slide, 0x401, ((char *)slide, LoadFarString(ZipfileTooBig)));
/*
printf(
" We need a better error message for: 64-bit file, 32-bit program.\n");
*/
CLOSE_INFILE();
return IZ_ERRBF;
}
#endif /* DO_SAFECHECK_2GB */
/*---------------------------------------------------------------------------
Find and process the end-of-central-directory header. UnZip need only
check last 65557 bytes of zipfile: comment may be up to 65535, end-of-
central-directory record is 18 bytes, and signature itself is 4 bytes;
add some to allow for appended garbage. Since ZipInfo is often used as
a debugging tool, search the whole zipfile if zipinfo_mode is true.
---------------------------------------------------------------------------*/
(*(Uz_Globs *)pG).cur_zipfile_bufstart = 0;
(*(Uz_Globs *)pG).inptr = (*(Uz_Globs *)pG).inbuf;
#if ((!defined(WINDLL) ) || !defined(NO_ZIPINFO))
# if (!defined(WINDLL) )
if ( (!uO.zipinfo_mode && !uO.qflag
# ifdef TIMESTAMP
&& !uO.T_flag
# endif
)
# ifndef NO_ZIPINFO
|| (uO.zipinfo_mode && uO.hflag)
# endif
)
# else /* not (!WINDLL && !SFX) ==> !NO_ZIPINFO !! */
if (uO.zipinfo_mode && uO.hflag)
# endif /* if..else..: (!WINDLL && !SFX) */
# ifdef WIN32 /* Win32 console may require codepage conversion for (*(Uz_Globs *)pG).zipfn */
Info(slide, 0, ((char *)slide, LoadFarString(LogInitline),
FnFilter1((*(Uz_Globs *)pG).zipfn)));
# else
Info(slide, 0, ((char *)slide, LoadFarString(LogInitline), (*(Uz_Globs *)pG).zipfn));
# endif
#endif /* (!WINDLL && !SFX) || !NO_ZIPINFO */
if ( (error_in_archive = find_ecrec(pG,
#ifndef NO_ZIPINFO
uO.zipinfo_mode ? (*(Uz_Globs *)pG).ziplen :
#endif
MIN((*(Uz_Globs *)pG).ziplen, 66000L)))
> PK_WARN )
{
CLOSE_INFILE();
if (maybe_exe)
Info(slide, 0x401, ((char *)slide, LoadFarString(MaybeExe),
(*(Uz_Globs *)pG).zipfn));
if (lastchance)
return error_in_archive;
else {
(*(Uz_Globs *)pG).no_ecrec = TRUE; /* assume we found wrong file: e.g., */
return PK_NOZIP; /* unzip instead of unzip.zip */
}
}
if ((uO.zflag > 0) && !uO.zipinfo_mode) { /* unzip: zflag = comment ONLY */
CLOSE_INFILE();
return error_in_archive;
}
/*---------------------------------------------------------------------------
Test the end-of-central-directory info for incompatibilities (multi-disk
archives) or inconsistencies (missing or extra bytes in zipfile).
---------------------------------------------------------------------------*/
#ifdef NO_MULTIPART
error = !uO.zipinfo_mode && ((*(Uz_Globs *)pG).ecrec.number_this_disk == 1) &&
((*(Uz_Globs *)pG).ecrec.num_disk_start_cdir == 1);
#else
error = !uO.zipinfo_mode && ((*(Uz_Globs *)pG).ecrec.number_this_disk != 0);
#endif
if (uO.zipinfo_mode &&
(*(Uz_Globs *)pG).ecrec.number_this_disk != (*(Uz_Globs *)pG).ecrec.num_disk_start_cdir)
{
if ((*(Uz_Globs *)pG).ecrec.number_this_disk > (*(Uz_Globs *)pG).ecrec.num_disk_start_cdir) {
Info(slide, 0x401, ((char *)slide,
LoadFarString(CentDirNotInZipMsg), (*(Uz_Globs *)pG).zipfn,
(ulg)(*(Uz_Globs *)pG).ecrec.number_this_disk,
(ulg)(*(Uz_Globs *)pG).ecrec.num_disk_start_cdir));
error_in_archive = PK_FIND;
too_weird_to_continue = TRUE;
} else {
Info(slide, 0x401, ((char *)slide,
LoadFarString(EndCentDirBogus), (*(Uz_Globs *)pG).zipfn,
(ulg)(*(Uz_Globs *)pG).ecrec.number_this_disk,
(ulg)(*(Uz_Globs *)pG).ecrec.num_disk_start_cdir));
error_in_archive = PK_WARN;
}
#ifdef NO_MULTIPART /* concatenation of multiple parts works in some cases */
} else if (!uO.zipinfo_mode && !error && (*(Uz_Globs *)pG).ecrec.number_this_disk != 0) {
Info(slide, 0x401, ((char *)slide, LoadFarString(NoMultiDiskArcSupport),
(*(Uz_Globs *)pG).zipfn));
error_in_archive = PK_FIND;
too_weird_to_continue = TRUE;
#endif
}
if (!too_weird_to_continue) { /* (relatively) normal zipfile: go for it */
if (error) {
Info(slide, 0x401, ((char *)slide, LoadFarString(MaybePakBug),
(*(Uz_Globs *)pG).zipfn));
error_in_archive = PK_WARN;
}
if (((*(Uz_Globs *)pG).extra_bytes = (*(Uz_Globs *)pG).real_ecrec_offset-(*(Uz_Globs *)pG).expect_ecrec_offset) <
(zoff_t)0)
{
Info(slide, 0x401, ((char *)slide, LoadFarString(MissingBytes),
(*(Uz_Globs *)pG).zipfn, FmZofft((-(*(Uz_Globs *)pG).extra_bytes), NULL, NULL)));
error_in_archive = PK_ERR;
} else if ((*(Uz_Globs *)pG).extra_bytes > 0) {
if (((*(Uz_Globs *)pG).ecrec.offset_start_central_directory == 0) &&
((*(Uz_Globs *)pG).ecrec.size_central_directory != 0)) /* zip 1.5 -go bug */
{
Info(slide, 0x401, ((char *)slide,
LoadFarString(NullCentDirOffset), (*(Uz_Globs *)pG).zipfn));
(*(Uz_Globs *)pG).ecrec.offset_start_central_directory = (*(Uz_Globs *)pG).extra_bytes;
(*(Uz_Globs *)pG).extra_bytes = 0;
error_in_archive = PK_ERR;
}
else {
Info(slide, 0x401, ((char *)slide,
LoadFarString(ExtraBytesAtStart), (*(Uz_Globs *)pG).zipfn,
FmZofft((*(Uz_Globs *)pG).extra_bytes, NULL, NULL),
((*(Uz_Globs *)pG).extra_bytes == 1)? "":"s"));
error_in_archive = PK_WARN;
}
}
/*-----------------------------------------------------------------------
Check for empty zipfile and exit now if so.
-----------------------------------------------------------------------*/
if ((*(Uz_Globs *)pG).expect_ecrec_offset==0L && (*(Uz_Globs *)pG).ecrec.size_central_directory==0) {
if (uO.zipinfo_mode)
Info(slide, 0, ((char *)slide, "%sEmpty zipfile.\n",
uO.lflag>9? "\n " : ""));
else
Info(slide, 0x401, ((char *)slide, LoadFarString(ZipfileEmpty),
(*(Uz_Globs *)pG).zipfn));
CLOSE_INFILE();
return (error_in_archive > PK_WARN)? error_in_archive : PK_WARN;
}
/*-----------------------------------------------------------------------
Compensate for missing or extra bytes, and seek to where the start
of central directory should be. If header not found, uncompensate
and try again (necessary for at least some Atari archives created
with STZip, as well as archives created by J.H. Holm's ZIPSPLIT 1.1).
-----------------------------------------------------------------------*/
error = seek_zipf(pG, (*(Uz_Globs *)pG).ecrec.offset_start_central_directory);
if (error == PK_BADERR) {
CLOSE_INFILE();
return PK_BADERR;
}
#ifdef OLD_SEEK_TEST
if (error != PK_OK || readbuf(pG, (*(Uz_Globs *)pG).sig, 4) == 0) {
CLOSE_INFILE();
return PK_ERR; /* file may be locked, or possibly disk error(?) */
}
if (memcmp((*(Uz_Globs *)pG).sig, central_hdr_sig, 4))
#else
if ((error != PK_OK) || (readbuf(pG, (*(Uz_Globs *)pG).sig, 4) == 0) ||
memcmp((*(Uz_Globs *)pG).sig, central_hdr_sig, 4))
#endif
{
zoff_t tmp = (*(Uz_Globs *)pG).extra_bytes;
(*(Uz_Globs *)pG).extra_bytes = 0;
error = seek_zipf(pG, (*(Uz_Globs *)pG).ecrec.offset_start_central_directory);
if ((error != PK_OK) || (readbuf(pG, (*(Uz_Globs *)pG).sig, 4) == 0) ||
memcmp((*(Uz_Globs *)pG).sig, central_hdr_sig, 4))
{
if (error != PK_BADERR)
Info(slide, 0x401, ((char *)slide,
LoadFarString(CentDirStartNotFound), (*(Uz_Globs *)pG).zipfn,
LoadFarStringSmall(ReportMsg)));
CLOSE_INFILE();
return (error != PK_OK ? error : PK_BADERR);
}
Info(slide, 0x401, ((char *)slide, LoadFarString(CentDirTooLong),
(*(Uz_Globs *)pG).zipfn, FmZofft((-tmp), NULL, NULL)));
error_in_archive = PK_ERR;
}
/*-----------------------------------------------------------------------
Seek to the start of the central directory one last time, since we
have just read the first entry's signature bytes; then list, extract
or test member files as instructed, and close the zipfile.
-----------------------------------------------------------------------*/
error = seek_zipf(pG, (*(Uz_Globs *)pG).ecrec.offset_start_central_directory);
if (error != PK_OK) {
CLOSE_INFILE();
return error;
}
Trace((stderr, "about to extract/list files (error = %d)\n",
error_in_archive));
#ifdef DLL
/* (*(Uz_Globs *)pG).fValidate is used only to look at an archive to see if
it appears to be a valid archive. There is no interest
in what the archive contains, nor in validating that the
entries in the archive are in good condition. This is
currently used only in the Windows DLLs for purposes of
checking archives within an archive to determine whether
or not to display the inner archives.
*/
if (!(*(Uz_Globs *)pG).fValidate)
#endif
{
#ifndef NO_ZIPINFO
if (uO.zipinfo_mode)
error = zipinfo(pG); /* ZIPINFO 'EM */
else
#endif
#ifdef TIMESTAMP
if (uO.T_flag)
error = get_time_stamp(pG, &uxstamp, &nmember);
else
#endif
if (uO.vflag && !uO.tflag && !uO.cflag)
error = list_files(pG); /* LIST 'EM */
else
error = extract_or_test_files(pG); /* EXTRACT OR TEST 'EM */
Trace((stderr, "done with extract/list files (error = %d)\n",
error));
}
if (error > error_in_archive) /* don't overwrite stronger error */
error_in_archive = error; /* with (for example) a warning */
} /* end if (!too_weird_to_continue) */
CLOSE_INFILE();
#ifdef TIMESTAMP
if (uO.T_flag && !uO.zipinfo_mode && (nmember > 0L)) {
# ifdef WIN32
if (stamp_file(pG, (*(Uz_Globs *)pG).zipfn, uxstamp)) { /* TIME-STAMP 'EM */
# else
if (stamp_file((*(Uz_Globs *)pG).zipfn, uxstamp)) { /* TIME-STAMP 'EM */
# endif
if (uO.qflag < 3)
Info(slide, 0x201, ((char *)slide,
LoadFarString(ZipTimeStampFailed), (*(Uz_Globs *)pG).zipfn));
if (error_in_archive < PK_WARN)
error_in_archive = PK_WARN;
} else {
if (!uO.qflag)
Info(slide, 0, ((char *)slide,
LoadFarString(ZipTimeStampSuccess), (*(Uz_Globs *)pG).zipfn));
}
}
#endif
return error_in_archive;
} /* end function do_seekable() */
#ifdef DO_SAFECHECK_2GB
/************************/
/* Function file_size() */
/************************/
/* File size determination which does not mislead for large files in a
small-file program. Probably should be somewhere else.
The file has to be opened previously
*/
static zoff_t file_size(file)
FILE *file;
{
int sts;
size_t siz;
zoff_t ofs;
char waste[4];
/* Seek to actual EOF. */
sts = zfseeko(file, 0, SEEK_END);
if (sts != 0) {
/* fseeko() failed. (Unlikely.) */
ofs = EOF;
} else {
/* Get apparent offset at EOF. */
ofs = zftello(file);
if (ofs < 0) {
/* Offset negative (overflow). File too big. */
ofs = EOF;
} else {
/* Seek to apparent EOF offset.
Won't be at actual EOF if offset was truncated.
*/
sts = zfseeko(file, ofs, SEEK_SET);
if (sts != 0) {
/* fseeko() failed. (Unlikely.) */
ofs = EOF;
} else {
/* Read a byte at apparent EOF. Should set EOF flag. */
siz = fread(waste, 1, 1, file);
if (feof(file) == 0) {
/* Not at EOF, but should be. File too big. */
ofs = EOF;
}
}
}
}
return ofs;
} /* end function file_size() */
#endif /* DO_SAFECHECK_2GB */
/***********************/
/* Function rec_find() */
/***********************/
static int rec_find(pG, searchlen, signature, rec_size)
/* return 0 when rec found, 1 when not found, 2 in case of read error */
Uz_Globs *pG;
zoff_t searchlen;
char* signature;
int rec_size;
{
int i, numblks, found=FALSE;
zoff_t tail_len;
/*---------------------------------------------------------------------------
Zipfile is longer than INBUFSIZ: may need to loop. Start with short
block at end of zipfile (if not TOO short).
---------------------------------------------------------------------------*/
if ((tail_len = (*(Uz_Globs *)pG).ziplen % INBUFSIZ) > rec_size) {
zfseeko((*(Uz_Globs *)pG).zipfd, (*(Uz_Globs *)pG).ziplen-tail_len, SEEK_SET);
(*(Uz_Globs *)pG).cur_zipfile_bufstart = zftello((*(Uz_Globs *)pG).zipfd);
if (((*(Uz_Globs *)pG).incnt = read((*(Uz_Globs *)pG).zipfd, (char *)(*(Uz_Globs *)pG).inbuf,
(unsigned int)tail_len)) != (int)tail_len)
return 2; /* it's expedient... */
/* 'P' must be at least (rec_size+4) bytes from end of zipfile */
for ((*(Uz_Globs *)pG).inptr = (*(Uz_Globs *)pG).inbuf+(int)tail_len-(rec_size+4);
(*(Uz_Globs *)pG).inptr >= (*(Uz_Globs *)pG).inbuf;
--(*(Uz_Globs *)pG).inptr) {
if ( (*(*(Uz_Globs *)pG).inptr == (uch)0x50) && /* ASCII 'P' */
!memcmp((char *)(*(Uz_Globs *)pG).inptr, signature, 4) ) {
(*(Uz_Globs *)pG).incnt -= (int)((*(Uz_Globs *)pG).inptr - (*(Uz_Globs *)pG).inbuf);
found = TRUE;
break;
}
}
/* sig may span block boundary: */
memcpy((char *)(*(Uz_Globs *)pG).hold, (char *)(*(Uz_Globs *)pG).inbuf, 3);
} else
(*(Uz_Globs *)pG).cur_zipfile_bufstart = (*(Uz_Globs *)pG).ziplen - tail_len;
/*-----------------------------------------------------------------------