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process.c
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process.c
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/*
Copyright (c) 1990-2014 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 OF((__GPRO__ int lastchance));
#ifdef DO_SAFECHECK_2GB
# ifdef USE_STRM_INPUT
static zoff_t file_size OF((FILE *file));
# else
static zoff_t file_size OF((int fh));
# endif
#endif /* DO_SAFECHECK_2GB */
static int rec_find OF((__GPRO__ zoff_t, char *, int));
static int find_ecrec64 OF((__GPRO__ zoff_t searchlen));
static int find_ecrec OF((__GPRO__ zoff_t searchlen));
static int process_zip_cmmnt OF((__GPRO));
static int get_cdir_ent OF((__GPRO));
#ifdef IZ_HAVE_UXUIDGID
static int read_ux3_value OF((ZCONST uch *dbuf, unsigned uidgid_sz,
ulg *p_uidgid));
#endif /* IZ_HAVE_UXUIDGID */
static ZCONST char Far CannotAllocateBuffers[] =
"error: cannot allocate unzip buffers\n";
#ifdef SFX
static ZCONST char Far CannotFindMyself[] =
"unzipsfx: cannot find myself! [%s]\n";
# ifdef CHEAP_SFX_AUTORUN
static ZCONST char Far AutorunPrompt[] =
"\nAuto-run command: %s\nExecute this command? [y/n] ";
static ZCONST char Far NotAutoRunning[] =
"Not executing auto-run command.";
# endif
#else /* !SFX */
/* process_zipfiles() strings */
# if (defined(IZ_CHECK_TZ) && defined(USE_EF_UT_TIME))
static ZCONST char Far WarnInvalidTZ[] =
"Warning: TZ environment variable not found, cannot use UTC times!!\n";
# endif
# if !(defined(UNIX) || defined(AMIGA))
static ZCONST char Far CannotFindWildcardMatch[] =
"%s: cannot find any matches for wildcard specification \"%s\".\n";
# endif /* !(UNIX || AMIGA) */
static ZCONST char Far FilesProcessOK[] =
"%d archive%s successfully processed.\n";
static ZCONST char Far ArchiveWarning[] =
"%d archive%s had warnings but no fatal errors.\n";
static ZCONST char Far ArchiveFatalError[] =
"%d archive%s had fatal errors.\n";
static ZCONST char Far FileHadNoZipfileDir[] =
"%d file%s had no zipfile directory.\n";
static ZCONST char Far ZipfileWasDir[] = "1 \"zipfile\" was a directory.\n";
static ZCONST char Far ManyZipfilesWereDir[] =
"%d \"zipfiles\" were directories.\n";
static ZCONST char Far NoZipfileFound[] = "No zipfiles found.\n";
/* do_seekable() strings */
# ifdef UNIX
static ZCONST char Far CannotFindZipfileDirMsg[] =
"%s: cannot find zipfile directory in one of %s or\n\
%s%s.zip, and cannot find %s, period.\n";
static ZCONST char Far CannotFindEitherZipfile[] =
"%s: cannot find or open %s, %s.zip or %s.\n";
# else /* !UNIX */
static ZCONST char Far CannotFindZipfileDirMsg[] =
"%s: cannot find zipfile directory in %s,\n\
%sand cannot find %s, period.\n";
# ifdef VMS
static ZCONST char Far CannotFindEitherZipfile[] =
"%s: cannot find %s (%s).\n";
# else /* !VMS */
static ZCONST char Far CannotFindEitherZipfile[] =
"%s: cannot find either %s or %s.\n";
# endif /* ?VMS */
# endif /* ?UNIX */
extern ZCONST char Far Zipnfo[]; /* in unzip.c */
#ifndef WINDLL
static ZCONST char Far Unzip[] = "unzip";
#else
static ZCONST char Far Unzip[] = "UnZip DLL";
#endif
#ifdef DO_SAFECHECK_2GB
static ZCONST char Far ZipfileTooBig[] =
"Trying to read large file (> 2 GiB) without large file support\n";
#endif /* DO_SAFECHECK_2GB */
static ZCONST char Far MaybeExe[] =
"note: %s may be a plain executable, not an archive\n";
static ZCONST char Far 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 ZCONST char Far 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 ZCONST char Far NoMultiDiskArcSupport[] =
"\nerror [%s]: zipfile is part of multi-disk archive\n\
(sorry, not yet supported).\n";
static ZCONST char Far 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 ZCONST char Far 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 ZCONST char Far ExtraBytesAtStart[] =
"warning [%s]: %s extra byte%s at beginning or within zipfile\n\
(attempting to process anyway)\n";
#endif /* ?SFX */
#if ((!defined(WINDLL) && !defined(SFX)) || !defined(NO_ZIPINFO))
static ZCONST char Far LogInitline[] = "Archive: %s\n";
#endif
static ZCONST char Far MissingBytes[] =
"error [%s]: missing %s bytes in zipfile\n\
(attempting to process anyway)\n";
static ZCONST char Far NullCentDirOffset[] =
"error [%s]: NULL central directory offset\n\
(attempting to process anyway)\n";
static ZCONST char Far ZipfileEmpty[] = "warning [%s]: zipfile is empty\n";
static ZCONST char Far CentDirStartNotFound[] =
"error [%s]: start of central directory not found;\n\
zipfile corrupt.\n%s";
static ZCONST char Far Cent64EndSigSearchErr[] =
"fatal error: read failure while seeking for End-of-centdir-64 signature.\n\
This zipfile is corrupt.\n";
static ZCONST char Far Cent64EndSigSearchOff[] =
"error: End-of-centdir-64 signature not where expected (prepended bytes?)\n\
(attempting to process anyway)\n";
#ifndef SFX
static ZCONST char Far 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 ZCONST char Far 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";
#else /* SFX */
static ZCONST char Far CentDirEndSigNotFound[] =
" End-of-central-directory signature not found.\n";
#endif /* ?SFX */
#ifdef TIMESTAMP
static ZCONST char Far ZipTimeStampFailed[] =
"warning: cannot set time for %s\n";
static ZCONST char Far ZipTimeStampSuccess[] =
"Updated time stamp for %s.\n";
#endif
static ZCONST char Far ZipfileCommTrunc1[] =
"\ncaution: zipfile comment truncated\n";
#ifndef NO_ZIPINFO
static ZCONST char Far NoZipfileComment[] =
"There is no zipfile comment.\n";
static ZCONST char Far ZipfileCommentDesc[] =
"The zipfile comment is %u bytes long and contains the following text:\n";
static ZCONST char Far ZipfileCommBegin[] =
"======================== zipfile comment begins\
==========================\n";
static ZCONST char Far ZipfileCommEnd[] =
"========================= zipfile comment ends\
===========================\n";
static ZCONST char Far ZipfileCommTrunc2[] =
"\n The zipfile comment is truncated.\n";
#endif /* !NO_ZIPINFO */
#ifdef UNICODE_SUPPORT
static ZCONST char Far UnicodeVersionError[] =
"\nwarning: Unicode Path version > 1\n";
static ZCONST char Far UnicodeMismatchError[] =
"\nwarning: Unicode Path checksum invalid\n";
#endif
/*******************************/
/* Function process_zipfiles() */
/*******************************/
int process_zipfiles(__G) /* return PK-type error code */
__GDEF
{
#ifndef SFX
char *lastzipfn = (char *)NULL;
int NumWinFiles, NumLoseFiles, NumWarnFiles;
int NumMissDirs, NumMissFiles;
#endif
int error=0, error_in_archive=0;
/*---------------------------------------------------------------------------
Start by allocating buffers and (re)constructing the various PK signature
strings.
---------------------------------------------------------------------------*/
G.inbuf = (uch *)malloc(INBUFSIZ + 4); /* 4 extra for hold[] (below) */
G.outbuf = (uch *)malloc(OUTBUFSIZ + 1); /* 1 extra for string term. */
if ((G.inbuf == (uch *)NULL) || (G.outbuf == (uch *)NULL)) {
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotAllocateBuffers)));
return(PK_MEM);
}
G.hold = G.inbuf + INBUFSIZ; /* to check for boundary-spanning sigs */
#ifndef VMS /* VMS uses its own buffer scheme for textmode flush(). */
#ifdef SMALL_MEM
G.outbuf2 = G.outbuf+RAWBUFSIZ; /* never changes */
#endif
#endif /* !VMS */
#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;
G.tz_is_valid = VALID_TIMEZONE(p);
# ifndef SFX
if (!G.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 */
/* For systems that do not have tzset() but supply this function using another
name (_tzset() or something similar), an appropiate "#define tzset ..."
should be added to the system specifc configuration section. */
#if (!defined(T20_VMS) && !defined(MACOS) && !defined(RISCOS) && !defined(QDOS))
#if (!defined(BSD) && !defined(MTS) && !defined(CMS_MVS) && !defined(TANDEM))
tzset();
#endif
#endif
/* 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(__G);
#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.
---------------------------------------------------------------------------*/
G.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.
---------------------------------------------------------------------------*/
#ifdef SFX
if ((error = do_seekable(__G__ 0)) == PK_NOZIP) {
#ifdef EXE_EXTENSION
int len=strlen(G.argv0);
/* append .exe if appropriate; also .sfx? */
if ( (G.zipfn = (char *)malloc(len+sizeof(EXE_EXTENSION))) !=
(char *)NULL ) {
strcpy(G.zipfn, G.argv0);
strcpy(G.zipfn+len, EXE_EXTENSION);
error = do_seekable(__G__ 0);
free(G.zipfn);
G.zipfn = G.argv0; /* for "cannot find myself" message only */
}
#endif /* EXE_EXTENSION */
#ifdef WIN32
G.zipfn = G.argv0; /* for "cannot find myself" message only */
#endif
}
if (error) {
if (error == IZ_DIR)
error_in_archive = PK_NOZIP;
else
error_in_archive = error;
if (error == PK_NOZIP)
Info(slide, 1, ((char *)slide, LoadFarString(CannotFindMyself),
G.zipfn));
}
#ifdef CHEAP_SFX_AUTORUN
if (G.autorun_command[0] && !uO.qflag) { /* NO autorun without prompt! */
Info(slide, 0x81, ((char *)slide, LoadFarString(AutorunPrompt),
FnFilter1(G.autorun_command)));
if (fgets(G.answerbuf, 9, stdin) != (char *)NULL
&& toupper(*G.answerbuf) == 'Y')
system(G.autorun_command);
else
Info(slide, 1, ((char *)slide, LoadFarString(NotAutoRunning)));
}
#endif /* CHEAP_SFX_AUTORUN */
#else /* !SFX */
NumWinFiles = NumLoseFiles = NumWarnFiles = 0;
NumMissDirs = NumMissFiles = 0;
while ((G.zipfn = do_wild(__G__ G.wildzipfn)) != (char *)NULL) {
Trace((stderr, "do_wild( %s ) returns %s\n", G.wildzipfn, G.zipfn));
lastzipfn = G.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)
(*G.message)((zvoid *)&G, (uch *)"\n", 1L, 0);
if ((error = do_seekable(__G__ 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(__G);
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(G.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)),
G.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 */
G.zipfn = lastzipfn;
NumMissDirs = NumMissFiles = 0;
error_in_archive = PK_COOL;
#if defined(UNIX) || defined(QDOS)
/* 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(__G__ 0)) == PK_NOZIP || error == IZ_DIR) {
if (error == IZ_DIR)
++NumMissDirs;
strcpy(p, ALT_ZSUFX);
error = do_seekable(__G__ 1);
}
#else
error = do_seekable(__G__ 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(__G);
return error;
}
#endif
}
}
#endif /* ?SFX */
/*---------------------------------------------------------------------------
Print summary of all zipfiles, assuming zipfile spec was a wildcard (no
need for a summary if just one zipfile).
---------------------------------------------------------------------------*/
#ifndef SFX
if (iswild(G.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))
(*G.message)((zvoid *)&G, (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)));
}
#endif /* !SFX */
/* free allocated memory */
free_G_buffers(__G);
return error_in_archive;
} /* end function process_zipfiles() */
/*****************************/
/* Function free_G_buffers() */
/*****************************/
void free_G_buffers(__G) /* releases all memory allocated in global vars */
__GDEF
{
#ifndef SFX
unsigned i;
#endif
#ifdef SYSTEM_SPECIFIC_DTOR
SYSTEM_SPECIFIC_DTOR(__G);
#endif
inflate_free(__G);
checkdir(__G__ (char *)NULL, END);
#ifdef DYNALLOC_CRCTAB
if (CRC_32_TAB) {
free_crc_table();
CRC_32_TAB = NULL;
}
#endif
if (G.key != (char *)NULL) {
free(G.key);
G.key = (char *)NULL;
}
if (G.extra_field != (uch *)NULL) {
free(G.extra_field);
G.extra_field = (uch *)NULL;
}
#if (!defined(VMS) && !defined(SMALL_MEM))
/* VMS uses its own buffer scheme for textmode flush() */
if (G.outbuf2) {
free(G.outbuf2); /* malloc'd ONLY if unshrink and -a */
G.outbuf2 = (uch *)NULL;
}
#endif
if (G.outbuf)
free(G.outbuf);
if (G.inbuf)
free(G.inbuf);
G.inbuf = G.outbuf = (uch *)NULL;
#ifdef UNICODE_SUPPORT
if (G.filename_full) {
free(G.filename_full);
G.filename_full = (char *)NULL;
G.fnfull_bufsize = 0;
}
#endif /* UNICODE_SUPPORT */
#ifndef SFX
for (i = 0; i < DIR_BLKSIZ; i++) {
if (G.info[i].cfilname != (char Far *)NULL) {
zffree(G.info[i].cfilname);
G.info[i].cfilname = (char Far *)NULL;
}
}
#endif
#ifdef MALLOC_WORK
if (G.area.Slide) {
free(G.area.Slide);
G.area.Slide = (uch *)NULL;
}
#endif
} /* end function free_G_buffers() */
/**************************/
/* Function do_seekable() */
/**************************/
static int do_seekable(__G__ lastchance) /* return PK-type error code */
__GDEF
int lastchance;
{
#ifndef SFX
/* 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
#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(G.zipfn, &G.statbuf) ||
#ifdef THEOS
(error = S_ISLIB(G.statbuf.st_mode)) != 0 ||
#endif
(error = S_ISDIR(G.statbuf.st_mode)) != 0)
{
#ifndef SFX
if (lastchance && (uO.qflag < 3)) {
#if defined(UNIX) || defined(QDOS)
if (G.no_ecrec)
Info(slide, 1, ((char *)slide,
LoadFarString(CannotFindZipfileDirMsg),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
G.wildzipfn, uO.zipinfo_mode? " " : "", G.wildzipfn,
G.zipfn));
else
Info(slide, 1, ((char *)slide,
LoadFarString(CannotFindEitherZipfile),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
G.wildzipfn, G.wildzipfn, G.zipfn));
#else /* !(UNIX || QDOS) */
if (G.no_ecrec)
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindZipfileDirMsg),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
G.wildzipfn, uO.zipinfo_mode? " " : "", G.zipfn));
else
#ifdef VMS
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindEitherZipfile),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
G.wildzipfn,
(*G.zipfn ? G.zipfn : vms_msg_text())));
#else /* !VMS */
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindEitherZipfile),
LoadFarStringSmall((uO.zipinfo_mode ? Zipnfo : Unzip)),
G.wildzipfn, G.zipfn));
#endif /* ?VMS */
#endif /* ?(UNIX || QDOS) */
}
#endif /* !SFX */
return error? IZ_DIR : PK_NOZIP;
}
G.ziplen = G.statbuf.st_size;
#ifndef SFX
#if defined(UNIX) || defined(DOS_OS2_W32) || defined(THEOS)
if (G.statbuf.st_mode & S_IEXEC) /* no extension on Unix exes: might */
maybe_exe = TRUE; /* find unzip, not unzip.zip; etc. */
#endif
#endif /* !SFX */
#ifdef VMS
if (check_format(__G)) /* check for variable-length format */
return PK_ERR;
#endif
if (open_input_file(__G)) /* 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. */
G.ziplen = file_size(G.zipfd);
if (G.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.
---------------------------------------------------------------------------*/
G.cur_zipfile_bufstart = 0;
G.inptr = G.inbuf;
#if ((!defined(WINDLL) && !defined(SFX)) || !defined(NO_ZIPINFO))
# if (!defined(WINDLL) && !defined(SFX))
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 G.zipfn */
Info(slide, 0, ((char *)slide, LoadFarString(LogInitline),
FnFilter1(G.zipfn)));
# else
Info(slide, 0, ((char *)slide, LoadFarString(LogInitline), G.zipfn));
# endif
#endif /* (!WINDLL && !SFX) || !NO_ZIPINFO */
if ( (error_in_archive = find_ecrec(__G__
#ifndef NO_ZIPINFO
uO.zipinfo_mode ? G.ziplen :
#endif
MIN(G.ziplen, 66000L)))
> PK_WARN )
{
CLOSE_INFILE();
#ifdef SFX
++lastchance; /* avoid picky compiler warnings */
return error_in_archive;
#else
if (maybe_exe)
Info(slide, 0x401, ((char *)slide, LoadFarString(MaybeExe),
G.zipfn));
if (lastchance)
return error_in_archive;
else {
G.no_ecrec = TRUE; /* assume we found wrong file: e.g., */
return PK_NOZIP; /* unzip instead of unzip.zip */
}
#endif /* ?SFX */
}
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 && (G.ecrec.number_this_disk == 1) &&
(G.ecrec.num_disk_start_cdir == 1);
#else
error = !uO.zipinfo_mode && (G.ecrec.number_this_disk != 0);
#endif
#ifndef SFX
if (uO.zipinfo_mode &&
G.ecrec.number_this_disk != G.ecrec.num_disk_start_cdir)
{
if (G.ecrec.number_this_disk > G.ecrec.num_disk_start_cdir) {
Info(slide, 0x401, ((char *)slide,
LoadFarString(CentDirNotInZipMsg), G.zipfn,
(ulg)G.ecrec.number_this_disk,
(ulg)G.ecrec.num_disk_start_cdir));
error_in_archive = PK_FIND;
too_weird_to_continue = TRUE;
} else {
Info(slide, 0x401, ((char *)slide,
LoadFarString(EndCentDirBogus), G.zipfn,
(ulg)G.ecrec.number_this_disk,
(ulg)G.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 && G.ecrec.number_this_disk != 0) {
Info(slide, 0x401, ((char *)slide, LoadFarString(NoMultiDiskArcSupport),
G.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),
G.zipfn));
error_in_archive = PK_WARN;
}
#endif /* !SFX */
if ((G.extra_bytes = G.real_ecrec_offset-G.expect_ecrec_offset) <
(zoff_t)0)
{
Info(slide, 0x401, ((char *)slide, LoadFarString(MissingBytes),
G.zipfn, FmZofft((-G.extra_bytes), NULL, NULL)));
error_in_archive = PK_ERR;
} else if (G.extra_bytes > 0) {
if ((G.ecrec.offset_start_central_directory == 0) &&
(G.ecrec.size_central_directory != 0)) /* zip 1.5 -go bug */
{
Info(slide, 0x401, ((char *)slide,
LoadFarString(NullCentDirOffset), G.zipfn));
G.ecrec.offset_start_central_directory = G.extra_bytes;
G.extra_bytes = 0;
error_in_archive = PK_ERR;
}
#ifndef SFX
else {
Info(slide, 0x401, ((char *)slide,
LoadFarString(ExtraBytesAtStart), G.zipfn,
FmZofft(G.extra_bytes, NULL, NULL),
(G.extra_bytes == 1)? "":"s"));
error_in_archive = PK_WARN;
}
#endif /* !SFX */
}
/*-----------------------------------------------------------------------
Check for empty zipfile and exit now if so.
-----------------------------------------------------------------------*/
if (G.expect_ecrec_offset==0L && G.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),
G.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(__G__ G.ecrec.offset_start_central_directory);
if (error == PK_BADERR) {
CLOSE_INFILE();
return PK_BADERR;
}
#ifdef OLD_SEEK_TEST
if (error != PK_OK || readbuf(__G__ G.sig, 4) == 0) {
CLOSE_INFILE();
return PK_ERR; /* file may be locked, or possibly disk error(?) */
}
if (memcmp(G.sig, central_hdr_sig, 4))
#else
if ((error != PK_OK) || (readbuf(__G__ G.sig, 4) == 0) ||
memcmp(G.sig, central_hdr_sig, 4))
#endif
{
#ifndef SFX
zoff_t tmp = G.extra_bytes;
#endif
G.extra_bytes = 0;
error = seek_zipf(__G__ G.ecrec.offset_start_central_directory);
if ((error != PK_OK) || (readbuf(__G__ G.sig, 4) == 0) ||
memcmp(G.sig, central_hdr_sig, 4))
{
if (error != PK_BADERR)
Info(slide, 0x401, ((char *)slide,
LoadFarString(CentDirStartNotFound), G.zipfn,
LoadFarStringSmall(ReportMsg)));
CLOSE_INFILE();
return (error != PK_OK ? error : PK_BADERR);
}
#ifndef SFX
Info(slide, 0x401, ((char *)slide, LoadFarString(CentDirTooLong),
G.zipfn, FmZofft((-tmp), NULL, NULL)));
#endif
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(__G__ G.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
/* G.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 (!G.fValidate)
#endif
{
#ifndef NO_ZIPINFO
if (uO.zipinfo_mode)
error = zipinfo(__G); /* ZIPINFO 'EM */
else
#endif
#ifndef SFX
#ifdef TIMESTAMP
if (uO.T_flag)
error = get_time_stamp(__G__ &uxstamp, &nmember);
else
#endif
if (uO.vflag && !uO.tflag && !uO.cflag)
error = list_files(__G); /* LIST 'EM */
else
#endif /* !SFX */
error = extract_or_test_files(__G); /* 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 */
#ifndef SFX
} /* end if (!too_weird_to_continue) */
#endif
CLOSE_INFILE();