Copyright (c) 1990-2001 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2000-Apr-09 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()
find_ecrec()
uz_end_central()
process_cdir_file_hdr()
get_cdir_ent()
process_local_file_hdr()
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
static int do_seekable OF((__GPRO__ int lastchance));
static int find_ecrec OF((__GPRO__ long searchlen));
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
# 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
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";
# 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 %s, %s.zip or %s.\n";
# else
# ifndef AMIGA
static ZCONST char Far CannotFindWildcardMatch[] =
"%s: cannot find any matches for wildcard specification \"%s\".\n";
# endif
static ZCONST char Far CannotFindZipfileDirMsg[] =
"%s: cannot find zipfile directory in %s,\n\
%sand cannot find %s, period.\n";
static ZCONST char Far CannotFindEitherZipfile[] =
"%s: cannot find either %s or %s.\n";
# endif
extern ZCONST char Far Zipnfo[];
#ifndef WINDLL
static ZCONST char Far Unzip[] = "unzip";
#else
static ZCONST char Far Unzip[] = "UnZip DLL";
#endif
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 %u of a multi-disk archive, and this is not the disk on\n\
which the central zipfile directory begins (disk %u).\n";
static ZCONST char Far EndCentDirBogus[] =
"\nwarning [%s]: end-of-central-directory record claims this\n\
is disk %u but that the central directory starts on disk %u; 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]: %ld extra byte%s at beginning or within zipfile\n\
(attempting to process anyway)\n";
#endif
static ZCONST char Far MissingBytes[] =
"error [%s]: missing %ld 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";
#ifndef SFX
static ZCONST char Far CentDirTooLong[] =
"error [%s]: reported length of central directory is\n\
%ld 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
static ZCONST char Far CentDirEndSigNotFound[] =
" End-of-central-directory signature not found.\n";
#endif
static ZCONST char Far ZipfileCommTrunc1[] =
"\ncaution: zipfile comment truncated\n";
int process_zipfiles(__G)
__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);
G.outbuf = (uch *)malloc(OUTBUFSIZ + 1);
if ((G.inbuf == (uch *)NULL) || (G.outbuf == (uch *)NULL)) {
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotAllocateBuffers)));
return(PK_MEM);
}
G.hold = G.inbuf + INBUFSIZ;
#ifndef VMS
#ifdef SMALL_MEM
G.outbuf2 = G.outbuf+RAWBUFSIZ;
#endif
#endif
#if 0
CRC_32_TAB = NULL;
#endif
local_hdr_sig[0] =
central_hdr_sig[0] = end_central_sig[0] = 0x50;
local_hdr_sig[1] =
central_hdr_sig[1] = end_central_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 were
initially copied from dos_to_unix_time() in fileio.c. probably, they are
still 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))
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
}
#endif
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 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);
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;
}
#endif
#ifdef WIN32
G.zipfn = G.argv0;
#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) {
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
#else
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;
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)
++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
}
if ((NumWinFiles + NumWarnFiles + NumLoseFiles) == 0 &&
(NumMissDirs + NumMissFiles) == 1 && lastzipfn != (char *)NULL)
{
NumMissDirs = NumMissFiles = 0;
if (error_in_archive == PK_NOZIP)
error_in_archive = PK_COOL;
#if (!defined(UNIX) && !defined(AMIGA))
if (iswild(G.wildzipfn))
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindWildcardMatch), uO.zipinfo_mode?
LoadFarStringSmall(Zipnfo) : LoadFarStringSmall(Unzip),
G.wildzipfn));
else
#endif
{
char *p = lastzipfn + strlen(lastzipfn);
G.zipfn = lastzipfn;
strcpy(p, ZSUFX);
#if defined(UNIX) || defined(QDOS)
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:
"1 file had no zipfile directory." */
;
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
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.qflag && !uO.zipinfo_mode)
#endif
)
{
if ((NumMissFiles + NumLoseFiles + NumWarnFiles > 0 || NumWinFiles != 1)
#ifdef TIMESTAMP
&& !(uO.T_flag && !uO.zipinfo_mode)
#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
free_G_buffers(__G);
return error_in_archive;
}
void free_G_buffers(__G)
__GDEF
{
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))
if (G.outbuf2) {
free(G.outbuf2);
G.outbuf2 = (uch *)NULL;
}
#endif
if (G.outbuf)
free(G.outbuf);
if (G.inbuf)
free(G.inbuf);
G.inbuf = G.outbuf = (uch *)NULL;
#ifdef MALLOC_WORK
if (G.area.Slide) {
free(G.area.Slide);
G.area.Slide = (uch *)NULL;
}
#endif
}
static int do_seekable(__G__ lastchance)
__GDEF
int lastchance;
{
#ifndef SFX
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), uO.zipinfo_mode?
LoadFarStringSmall(Zipnfo) : LoadFarStringSmall(Unzip),
G.wildzipfn, uO.zipinfo_mode? " " : "", G.wildzipfn,
G.zipfn));
else
Info(slide, 1, ((char *)slide,
LoadFarString(CannotFindEitherZipfile), uO.zipinfo_mode?
LoadFarStringSmall(Zipnfo) : LoadFarStringSmall(Unzip),
G.wildzipfn, G.wildzipfn, G.zipfn));
#else
if (G.no_ecrec)
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindZipfileDirMsg), uO.zipinfo_mode?
LoadFarStringSmall(Zipnfo) : LoadFarStringSmall(Unzip),
G.wildzipfn, uO.zipinfo_mode? " " : "", G.zipfn));
else
Info(slide, 0x401, ((char *)slide,
LoadFarString(CannotFindEitherZipfile), uO.zipinfo_mode?
LoadFarStringSmall(Zipnfo) : LoadFarStringSmall(Unzip),
G.wildzipfn, G.zipfn));
#endif
}
#endif
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)
maybe_exe = TRUE;
#endif
#endif
#ifdef VMS
if (check_format(__G))
return PK_ERR;
#endif
if (open_input_file(__G))
return PK_NOZIP;
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.
---------------------------------------------------------------------------*/
if (CRC_32_TAB == NULL) {
if ((CRC_32_TAB = get_crc_table()) == NULL) {
CLOSE_INFILE();
return PK_MEM;
}
}
#if (!defined(SFX) || defined(SFX_EXDIR))
if (uO.exdir != (char *)NULL && G.extract_flag) {
G.create_dirs = !uO.fflag;
if ((error = checkdir(__G__ uO.exdir, ROOT)) > MPN_INF_SKIP) {
CLOSE_INFILE();
return (error == MPN_NOMEM ? PK_MEM : PK_ERR);
}
}
#endif
G.cur_zipfile_bufstart = 0;
G.inptr = G.inbuf;
#if (!defined(WINDLL) && !defined(SFX))
#ifdef TIMESTAMP
if (!uO.zipinfo_mode && !uO.qflag && !uO.T_flag)
#else
if (!uO.zipinfo_mode && !uO.qflag)
#endif
#ifdef WIN32
Info(slide, 0, ((char *)slide, "Archive: %s\n", FnFilter1(G.zipfn)));
#else
Info(slide, 0, ((char *)slide, "Archive: %s\n", G.zipfn));
#endif
#endif
if ((
#ifndef NO_ZIPINFO
uO.zipinfo_mode &&
((error_in_archive = find_ecrec(__G__ G.ziplen)) != 0 ||
(error_in_archive = zi_end_central(__G)) > PK_WARN))
|| (!uO.zipinfo_mode &&
#endif
((error_in_archive = find_ecrec(__G__ MIN(G.ziplen,66000L))) != 0 ||
(error_in_archive = uz_end_central(__G)) > PK_WARN)))
{
CLOSE_INFILE();
#ifdef SFX
++lastchance;
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;
return PK_NOZIP;
}
#endif
}
if ((uO.zflag > 0) && !uO.zipinfo_mode) {
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,
G.ecrec.number_this_disk, 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,
G.ecrec.number_this_disk, G.ecrec.num_disk_start_cdir));
error_in_archive = PK_WARN;
}
#ifdef NO_MULTIPART
} 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) {
if (error) {
Info(slide, 0x401, ((char *)slide, LoadFarString(MaybePakBug),
G.zipfn));
error_in_archive = PK_WARN;
}
#endif
if ((G.extra_bytes = G.real_ecrec_offset-G.expect_ecrec_offset) <
(LONGINT)0)
{
Info(slide, 0x401, ((char *)slide, LoadFarString(MissingBytes),
G.zipfn, (long)(-G.extra_bytes)));
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))
{
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,
(long)G.extra_bytes, (G.extra_bytes == 1)? "":"s"));
error_in_archive = PK_WARN;
}
#endif
}
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;
}
if (strncmp(G.sig, central_hdr_sig, 4))
#else
if ((error != PK_OK) || (readbuf(__G__ G.sig, 4) == 0) ||
strncmp(G.sig, central_hdr_sig, 4))
#endif
{
#ifndef SFX
long 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) ||
strncmp(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, -tmp));
#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
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);
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);
else
#endif
error = extract_or_test_files(__G);
Trace((stderr, "done with extract/list files (error = %d)\n",
error));
}
if (error > error_in_archive)
error_in_archive = error;
#ifndef SFX
}
#endif
CLOSE_INFILE();
#ifdef TIMESTAMP
if (uO.T_flag && !uO.zipinfo_mode && (nmember > 0L)) {
# ifdef WIN32
if (stamp_file(__G__ G.zipfn, uxstamp)) {
# else
if (stamp_file(G.zipfn, uxstamp)) { /* TIME-STAMP 'EM */
# endif
if (uO.qflag < 3)
Info(slide, 0x201, ((char *)slide,
"warning: cannot set time for %s\n", G.zipfn));
if (error_in_archive < PK_WARN)
error_in_archive = PK_WARN;
}
}
#endif
return error_in_archive;
}
static int find_ecrec(__G__ searchlen)
__GDEF
long searchlen;
{
int i, numblks, found=FALSE;
LONGINT tail_len;
ec_byte_rec byterec;
Treat case of short zipfile separately.
---------------------------------------------------------------------------*/
if (G.ziplen <= INBUFSIZ) {
lseek(G.zipfd, 0L, SEEK_SET);
if ((G.incnt = read(G.zipfd,(char *)G.inbuf,(unsigned int)G.ziplen))
== (int)G.ziplen)
for (G.inptr = G.inbuf+(int)G.ziplen-(ECREC_SIZE+4);
G.inptr >= G.inbuf;
--G.inptr) {
if ( (*G.inptr == (uch)0x50) &&
!strncmp((char *)G.inptr, end_central_sig, 4)) {
G.incnt -= (int)(G.inptr - G.inbuf);
found = TRUE;
break;
}
}
Zipfile is longer than INBUFSIZ: may need to loop. Start with short
block at end of zipfile (if not TOO short).
---------------------------------------------------------------------------*/
} else {
if ((tail_len = G.ziplen % INBUFSIZ) > ECREC_SIZE) {
#ifdef USE_STRM_INPUT
fseek((FILE *)G.zipfd, G.ziplen-tail_len, SEEK_SET);
G.cur_zipfile_bufstart = ftell((FILE *)G.zipfd);
#else
G.cur_zipfile_bufstart = lseek(G.zipfd, G.ziplen-tail_len,
SEEK_SET);
#endif
if ((G.incnt = read(G.zipfd, (char *)G.inbuf,
(unsigned int)tail_len)) != (int)tail_len)
goto fail;
for (G.inptr = G.inbuf+(int)tail_len-(ECREC_SIZE+4);
G.inptr >= G.inbuf;
--G.inptr) {
if ( (*G.inptr == (uch)0x50) &&
!strncmp((char *)G.inptr, end_central_sig, 4)) {
G.incnt -= (int)(G.inptr - G.inbuf);
found = TRUE;
break;
}
}
memcpy((char *)G.hold, (char *)G.inbuf, 3);
} else
G.cur_zipfile_bufstart = G.ziplen - tail_len;
Loop through blocks of zipfile data, starting at the end and going
toward the beginning. In general, need not check whole zipfile for
signature, but may want to do so if testing.
-----------------------------------------------------------------------*/
numblks = (int)((searchlen - tail_len + (INBUFSIZ-1)) / INBUFSIZ);
for (i = 1; !found && (i <= numblks); ++i) {
G.cur_zipfile_bufstart -= INBUFSIZ;
lseek(G.zipfd, G.cur_zipfile_bufstart, SEEK_SET);
if ((G.incnt = read(G.zipfd,(char *)G.inbuf,INBUFSIZ))
!= INBUFSIZ)
break;
for (G.inptr = G.inbuf+INBUFSIZ-1; G.inptr >= G.inbuf;
--G.inptr)
if ((native(*G.inptr) == 'P') &&
!strncmp((char *)G.inptr, end_central_sig, 4)) {
G.incnt -= (int)(G.inptr - G.inbuf);
found = TRUE;
break;
}
memcpy((char *)G.hold, (char *)G.inbuf, 3);
}
}
Searched through whole region where signature should be without finding
it. Print informational message and die a horrible death.
---------------------------------------------------------------------------*/
fail:
if (!found) {
if (uO.qflag || uO.zipinfo_mode)
Info(slide, 0x401, ((char *)slide, "[%s]\n", G.zipfn));
Info(slide, 0x401, ((char *)slide,
LoadFarString(CentDirEndSigNotFound)));
return PK_ERR;
}
Found the signature, so get the end-central data before returning. Do
any necessary machine-type conversions (byte ordering, structure padding
compensation) by reading data into character array and copying to struct.
---------------------------------------------------------------------------*/
G.real_ecrec_offset = G.cur_zipfile_bufstart + (G.inptr-G.inbuf);
#ifdef TEST
printf("\n found end-of-central-dir signature at offset %ld (%.8lXh)\n",
G.real_ecrec_offset, G.real_ecrec_offset);
printf(" from beginning of file; offset %d (%.4Xh) within block\n",
G.inptr-G.inbuf, G.inptr-G.inbuf);
#endif
if (readbuf(__G__ (char *)byterec, ECREC_SIZE+4) == 0)
return PK_EOF;
G.ecrec.number_this_disk =
makeword(&byterec[NUMBER_THIS_DISK]);
G.ecrec.num_disk_start_cdir =
makeword(&byterec[NUM_DISK_WITH_START_CENTRAL_DIR]);
G.ecrec.num_entries_centrl_dir_ths_disk =
makeword(&byterec[NUM_ENTRIES_CENTRL_DIR_THS_DISK]);
G.ecrec.total_entries_central_dir =
makeword(&byterec[TOTAL_ENTRIES_CENTRAL_DIR]);
G.ecrec.size_central_directory =
makelong(&byterec[SIZE_CENTRAL_DIRECTORY]);
G.ecrec.offset_start_central_directory =
makelong(&byterec[OFFSET_START_CENTRAL_DIRECTORY]);
G.ecrec.zipfile_comment_length =
makeword(&byterec[ZIPFILE_COMMENT_LENGTH]);
G.expect_ecrec_offset = G.ecrec.offset_start_central_directory +
G.ecrec.size_central_directory;
return PK_COOL;
}
int uz_end_central(__G)
__GDEF
{
int error = PK_COOL;
Get the zipfile comment (up to 64KB long), if any, and print it out.
Then position the file pointer to the beginning of the central directory
and fill buffer.
---------------------------------------------------------------------------*/
#ifdef WINDLL
if ((!G.fValidate) && (G.lpUserFunctions != NULL))
G.lpUserFunctions->cchComment = G.ecrec.zipfile_comment_length;
if (G.ecrec.zipfile_comment_length && (uO.zflag > 0))
#else
if (G.ecrec.zipfile_comment_length && (uO.zflag > 0 ||
(uO.zflag == 0 &&
#ifdef TIMESTAMP
!uO.T_flag &&
#endif
!uO.qflag)))
#endif
{
#if (defined(SFX) && defined(CHEAP_SFX_AUTORUN))
if (do_string(__G__ G.ecrec.zipfile_comment_length, CHECK_AUTORUN)) {
#else
if (do_string(__G__ G.ecrec.zipfile_comment_length, DISPLAY)) {
#endif
Info(slide, 0x401, ((char *)slide,
LoadFarString(ZipfileCommTrunc1)));
error = PK_WARN;
}
}
#if (defined(SFX) && defined(CHEAP_SFX_AUTORUN))
else if (G.ecrec.zipfile_comment_length) {
if (do_string(__G__ G.ecrec.zipfile_comment_length, CHECK_AUTORUN_Q)) {
Info(slide, 0x401, ((char *)slide,
LoadFarString(ZipfileCommTrunc1)));
error = PK_WARN;
}
}
#endif
return error;
}
int process_cdir_file_hdr(__G)
__GDEF
{
int error;
Get central directory info, save host and method numbers, and set flag
for lowercase conversion of filename, depending on the OS from which the
file is coming.
---------------------------------------------------------------------------*/
if ((error = get_cdir_ent(__G)) != 0)
return error;
G.pInfo->hostver = G.crec.version_made_by[0];
G.pInfo->hostnum = MIN(G.crec.version_made_by[1], NUM_HOSTS);
G.pInfo->lcflag = 0;
if (uO.L_flag == 1)
switch (G.pInfo->hostnum) {
case FS_FAT_:
case CPM_:
case VM_CMS_:
case MVS_:
case TANDEM_:
case TOPS20_:
case VMS_:
G.pInfo->lcflag = 1;
break;
default:
break;
}
else if (uO.L_flag > 1)
G.pInfo->lcflag = 1;
if (IS_VOLID(G.crec.external_file_attributes) &&
(G.pInfo->hostnum == FS_FAT_ || G.pInfo->hostnum == FS_HPFS_ ||
G.pInfo->hostnum == FS_NTFS_ || G.pInfo->hostnum == ATARI_))
{
G.pInfo->vollabel = TRUE;
G.pInfo->lcflag = 0;
} else
G.pInfo->vollabel = FALSE;
deciding which kind of codepage conversion has to be applied to
strings (see do_string() function in fileio.c) */
G.pInfo->HasUxAtt = (G.crec.external_file_attributes & 0xffff0000L) != 0L;
return PK_COOL;
}
int get_cdir_ent(__G)
__GDEF
{
cdir_byte_hdr byterec;
Read the next central directory entry and do any necessary machine-type
conversions (byte ordering, structure padding compensation--do so by
copying the data from the array into which it was read (byterec) to the
usable struct (crec)).
---------------------------------------------------------------------------*/
if (readbuf(__G__ (char *)byterec, CREC_SIZE) == 0)
return PK_EOF;
G.crec.version_made_by[0] = byterec[C_VERSION_MADE_BY_0];
G.crec.version_made_by[1] = byterec[C_VERSION_MADE_BY_1];
G.crec.version_needed_to_extract[0] =
byterec[C_VERSION_NEEDED_TO_EXTRACT_0];
G.crec.version_needed_to_extract[1] =
byterec[C_VERSION_NEEDED_TO_EXTRACT_1];
G.crec.general_purpose_bit_flag =
makeword(&byterec[C_GENERAL_PURPOSE_BIT_FLAG]);
G.crec.compression_method =
makeword(&byterec[C_COMPRESSION_METHOD]);
G.crec.last_mod_dos_datetime =
makelong(&byterec[C_LAST_MOD_DOS_DATETIME]);
G.crec.crc32 =
makelong(&byterec[C_CRC32]);
G.crec.csize =
makelong(&byterec[C_COMPRESSED_SIZE]);
G.crec.ucsize =
makelong(&byterec[C_UNCOMPRESSED_SIZE]);
G.crec.filename_length =
makeword(&byterec[C_FILENAME_LENGTH]);
G.crec.extra_field_length =
makeword(&byterec[C_EXTRA_FIELD_LENGTH]);
G.crec.file_comment_length =
makeword(&byterec[C_FILE_COMMENT_LENGTH]);
G.crec.disk_number_start =
makeword(&byterec[C_DISK_NUMBER_START]);
G.crec.internal_file_attributes =
makeword(&byterec[C_INTERNAL_FILE_ATTRIBUTES]);
G.crec.external_file_attributes =
makelong(&byterec[C_EXTERNAL_FILE_ATTRIBUTES]);
G.crec.relative_offset_local_header =
makelong(&byterec[C_RELATIVE_OFFSET_LOCAL_HEADER]);
return PK_COOL;
}
int process_local_file_hdr(__G)
__GDEF
{
local_byte_hdr byterec;
Read the next local file header and do any necessary machine-type con-
versions (byte ordering, structure padding compensation--do so by copy-
ing the data from the array into which it was read (byterec) to the
usable struct (lrec)).
---------------------------------------------------------------------------*/
if (readbuf(__G__ (char *)byterec, LREC_SIZE) == 0)
return PK_EOF;
G.lrec.version_needed_to_extract[0] =
byterec[L_VERSION_NEEDED_TO_EXTRACT_0];
G.lrec.version_needed_to_extract[1] =
byterec[L_VERSION_NEEDED_TO_EXTRACT_1];
G.lrec.general_purpose_bit_flag =
makeword(&byterec[L_GENERAL_PURPOSE_BIT_FLAG]);
G.lrec.compression_method = makeword(&byterec[L_COMPRESSION_METHOD]);
G.lrec.last_mod_dos_datetime = makelong(&byterec[L_LAST_MOD_DOS_DATETIME]);
G.lrec.crc32 = makelong(&byterec[L_CRC32]);
G.lrec.csize = makelong(&byterec[L_COMPRESSED_SIZE]);
G.lrec.ucsize = makelong(&byterec[L_UNCOMPRESSED_SIZE]);
G.lrec.filename_length = makeword(&byterec[L_FILENAME_LENGTH]);
G.lrec.extra_field_length = makeword(&byterec[L_EXTRA_FIELD_LENGTH]);
if ((G.lrec.general_purpose_bit_flag & 8) != 0) {
G.lrec.crc32 = G.pInfo->crc;
G.lrec.csize = G.pInfo->compr_size;
G.lrec.ucsize = G.pInfo->uncompr_size;
}
G.csize = (long)G.lrec.csize;
return PK_COOL;
}
#ifdef USE_EF_UT_TIME
unsigned ef_scan_for_izux(ef_buf, ef_len, ef_is_c, dos_mdatetime,
z_utim, z_uidgid)
ZCONST uch *ef_buf;
unsigned ef_len;
int ef_is_c;
ulg dos_mdatetime;
iztimes *z_utim;
ush *z_uidgid;
{
unsigned flags = 0;
unsigned eb_id;
unsigned eb_len;
int have_new_type_eb = FALSE;
long i_time;
#ifdef TIME_T_TYPE_DOUBLE
int ut_in_archive_sgn = 0;
#else
int ut_zip_unzip_compatible = FALSE;
#endif
This function scans the extra field for EF_TIME, EF_IZUNIX2, EF_IZUNIX, or
EF_PKUNIX blocks containing Unix-style time_t (GMT) values for the entry's
access, creation, and modification time.
If a valid block is found, the time stamps are copied to the iztimes
structure (provided the z_utim pointer is not NULL).
If a IZUNIX2 block is found or the IZUNIX block contains UID/GID fields,
and the z_uidgid array pointer is valid (!= NULL), the owner info is
transfered as well.
The presence of an EF_TIME or EF_IZUNIX2 block results in ignoring all
data from probably present obsolete EF_IZUNIX blocks.
If multiple blocks of the same type are found, only the information from
the last block is used.
The return value is a combination of the EF_TIME Flags field with an
additional flag bit indicating the presence of valid UID/GID info,
or 0 in case of failure.
---------------------------------------------------------------------------*/
if (ef_len == 0 || ef_buf == NULL || (z_utim == 0 && z_uidgid == NULL))
return 0;
TTrace((stderr,"\nef_scan_for_izux: scanning extra field of length %u\n",
ef_len));
while (ef_len >= EB_HEADSIZE) {
eb_id = makeword(EB_ID + ef_buf);
eb_len = makeword(EB_LEN + ef_buf);
if (eb_len > (ef_len - EB_HEADSIZE)) {
TTrace((stderr,
"ef_scan_for_izux: block length %u > rest ef_size %u\n", eb_len,
ef_len - EB_HEADSIZE));
break;
}
switch (eb_id) {
case EF_TIME:
flags &= ~0x0ff;
have_new_type_eb = TRUE;
if ( eb_len >= EB_UT_MINLEN && z_utim != NULL) {
unsigned eb_idx = EB_UT_TIME1;
TTrace((stderr,"ef_scan_for_izux: found TIME extra field\n"));
flags |= (ef_buf[EB_HEADSIZE+EB_UT_FLAGS] & 0x0ff);
if ((flags & EB_UT_FL_MTIME)) {
if ((eb_idx+4) <= eb_len) {
i_time = (long)makelong((EB_HEADSIZE+eb_idx) + ef_buf);
eb_idx += 4;
TTrace((stderr," UT e.f. modification time = %ld\n",
i_time));
#ifdef TIME_T_TYPE_DOUBLE
if ((ulg)(i_time) & (ulg)(0x80000000L)) {
if (dos_mdatetime == DOSTIME_MINIMUM) {
ut_in_archive_sgn = -1;
z_utim->mtime =
(time_t)((long)i_time | (~(long)0x7fffffffL));
} else if (dos_mdatetime >= DOSTIME_2038_01_18) {
ut_in_archive_sgn = 1;
z_utim->mtime =
(time_t)((ulg)i_time & (ulg)0xffffffffL);
} else {
ut_in_archive_sgn = 0;
without modtime: ignore complete UT field */
flags &= ~0x0ff;
TTrace((stderr,
" UT modtime range error; ignore e.f.!\n"));
break;
}
} else {
ut_in_archive_sgn = 0;
z_utim->mtime = (time_t)i_time;
}
#else
if ((ulg)(i_time) & (ulg)(0x80000000L)) {
ut_zip_unzip_compatible =
((time_t)0x80000000L < (time_t)0L)
? (dos_mdatetime == DOSTIME_MINIMUM)
: (dos_mdatetime >= DOSTIME_2038_01_18);
if (!ut_zip_unzip_compatible) {
without modtime: ignore complete UT field */
flags &= ~0x0ff;
TTrace((stderr,
" UT modtime range error; ignore e.f.!\n"));
break;
}
} else {
ut_zip_unzip_compatible = FALSE;
}
z_utim->mtime = (time_t)i_time;
#endif
} else {
flags &= ~EB_UT_FL_MTIME;
TTrace((stderr," UT e.f. truncated; no modtime\n"));
}
}
if (ef_is_c) {
break;
}
if (flags & EB_UT_FL_ATIME) {
if ((eb_idx+4) <= eb_len) {
i_time = (long)makelong((EB_HEADSIZE+eb_idx) + ef_buf);
eb_idx += 4;
TTrace((stderr," UT e.f. access time = %ld\n",
i_time));
#ifdef TIME_T_TYPE_DOUBLE
if ((ulg)(i_time) & (ulg)(0x80000000L)) {
if (ut_in_archive_sgn == -1)
z_utim->atime =
(time_t)((long)i_time | (~(long)0x7fffffffL));
} else if (ut_in_archive_sgn == 1) {
z_utim->atime =
(time_t)((ulg)i_time & (ulg)0xffffffffL);
} else {
flags &= ~EB_UT_FL_ATIME;
TTrace((stderr,
" UT access time range error: skip time!\n"));
}
} else {
z_utim->atime = (time_t)i_time;
}
#else
if (((ulg)(i_time) & (ulg)(0x80000000L)) &&
!ut_zip_unzip_compatible) {
flags &= ~EB_UT_FL_ATIME;
TTrace((stderr,
" UT access time range error: skip time!\n"));
} else {
z_utim->atime = (time_t)i_time;
}
#endif
} else {
flags &= ~EB_UT_FL_ATIME;
}
}
if (flags & EB_UT_FL_CTIME) {
if ((eb_idx+4) <= eb_len) {
i_time = (long)makelong((EB_HEADSIZE+eb_idx) + ef_buf);
TTrace((stderr," UT e.f. creation time = %ld\n",
i_time));
#ifdef TIME_T_TYPE_DOUBLE
if ((ulg)(i_time) & (ulg)(0x80000000L)) {
if (ut_in_archive_sgn == -1)
z_utim->ctime =
(time_t)((long)i_time | (~(long)0x7fffffffL));
} else if (ut_in_archive_sgn == 1) {
z_utim->ctime =
(time_t)((ulg)i_time & (ulg)0xffffffffL);
} else {
flags &= ~EB_UT_FL_CTIME;
TTrace((stderr,
" UT creation time range error: skip time!\n"));
}
} else {
z_utim->ctime = (time_t)i_time;
}
#else
if (((ulg)(i_time) & (ulg)(0x80000000L)) &&
!ut_zip_unzip_compatible) {
flags &= ~EB_UT_FL_CTIME;
TTrace((stderr,
" UT creation time range error: skip time!\n"));
} else {
z_utim->ctime = (time_t)i_time;
}
#endif
} else {
flags &= ~EB_UT_FL_CTIME;
}
}
}
break;
case EF_IZUNIX2:
if (!have_new_type_eb) {
flags &= ~0x0ff;
have_new_type_eb = TRUE;
}
if (eb_len >= EB_UX2_MINLEN && z_uidgid != NULL) {
z_uidgid[0] = makeword((EB_HEADSIZE+EB_UX2_UID) + ef_buf);
z_uidgid[1] = makeword((EB_HEADSIZE+EB_UX2_GID) + ef_buf);
flags |= EB_UX2_VALID;
}
break;
case EF_IZUNIX:
case EF_PKUNIX:
if (eb_len >= EB_UX_MINLEN) {
TTrace((stderr,"ef_scan_for_izux: found %s extra field\n",
(eb_id == EF_IZUNIX ? "IZUNIX" : "PKUNIX")));
if (have_new_type_eb) {
break;
}
if (z_utim != NULL) {
flags |= (EB_UT_FL_MTIME | EB_UT_FL_ATIME);
i_time = (long)makelong((EB_HEADSIZE+EB_UX_MTIME)+ef_buf);
TTrace((stderr," Unix EF modtime = %ld\n", i_time));
#ifdef TIME_T_TYPE_DOUBLE
if ((ulg)(i_time) & (ulg)(0x80000000L)) {
if (dos_mdatetime == DOSTIME_MINIMUM) {
ut_in_archive_sgn = -1;
z_utim->mtime =
(time_t)((long)i_time | (~(long)0x7fffffffL));
} else if (dos_mdatetime >= DOSTIME_2038_01_18) {
ut_in_archive_sgn = 1;
z_utim->mtime =
(time_t)((ulg)i_time & (ulg)0xffffffffL);
} else {
ut_in_archive_sgn = 0;
without modtime: ignore complete UT field */
flags &= ~0x0ff;
TTrace((stderr,
" UX modtime range error: ignore e.f.!\n"));
}
} else {
ut_in_archive_sgn = 0;
z_utim->mtime = (time_t)i_time;
}
#else
if ((ulg)(i_time) & (ulg)(0x80000000L)) {
ut_zip_unzip_compatible =
((time_t)0x80000000L < (time_t)0L)
? (dos_mdatetime == DOSTIME_MINIMUM)
: (dos_mdatetime >= DOSTIME_2038_01_18);
if (!ut_zip_unzip_compatible) {
without modtime: ignore complete UT field */
flags &= ~0x0ff;
TTrace((stderr,
" UX modtime range error: ignore e.f.!\n"));
}
} else {
ut_zip_unzip_compatible = FALSE;
}
z_utim->mtime = (time_t)i_time;
#endif
i_time = (long)makelong((EB_HEADSIZE+EB_UX_ATIME)+ef_buf);
TTrace((stderr," Unix EF actime = %ld\n", i_time));
#ifdef TIME_T_TYPE_DOUBLE
if ((ulg)(i_time) & (ulg)(0x80000000L)) {
if (ut_in_archive_sgn == -1)
z_utim->atime =
(time_t)((long)i_time | (~(long)0x7fffffffL));
} else if (ut_in_archive_sgn == 1) {
z_utim->atime =
(time_t)((ulg)i_time & (ulg)0xffffffffL);
} else if (flags & 0x0ff) {
flags &= ~EB_UT_FL_ATIME;
TTrace((stderr,
" UX access time range error: skip time!\n"));
}
} else {
z_utim->atime = (time_t)i_time;
}
#else
if (((ulg)(i_time) & (ulg)(0x80000000L)) &&
!ut_zip_unzip_compatible && (flags & 0x0ff)) {
flags &= ~EB_UT_FL_ATIME;
TTrace((stderr,
" UX access time range error: skip time!\n"));
} else {
z_utim->atime = (time_t)i_time;
}
#endif
}
if (eb_len >= EB_UX_FULLSIZE && z_uidgid != NULL) {
z_uidgid[0] = makeword((EB_HEADSIZE+EB_UX_UID) + ef_buf);
z_uidgid[1] = makeword((EB_HEADSIZE+EB_UX_GID) + ef_buf);
flags |= EB_UX2_VALID;
}
}
break;
default:
break;
}
ef_buf += (eb_len + EB_HEADSIZE);
ef_len -= (eb_len + EB_HEADSIZE);
}
return flags;
}
#endif
#if (defined(RISCOS) || defined(ACORN_FTYPE_NFS))
#define SPARKID_2 0x30435241 /* = "ARC0" */
zvoid *getRISCOSexfield(ef_buf, ef_len)
ZCONST uch *ef_buf;
unsigned ef_len;
{
unsigned eb_id;
unsigned eb_len;
This function scans the extra field for a Acorn SPARK filetype ef-block.
If a valid block is found, the function returns a pointer to the start
of the SPARK_EF block in the extra field buffer. Otherwise, a NULL
pointer is returned.
---------------------------------------------------------------------------*/
if (ef_len == 0 || ef_buf == NULL)
return NULL;
TTrace((stderr,"\ngetRISCOSexfield: scanning extra field of length %u\n",
ef_len));
while (ef_len >= EB_HEADSIZE) {
eb_id = makeword(EB_ID + ef_buf);
eb_len = makeword(EB_LEN + ef_buf);
if (eb_len > (ef_len - EB_HEADSIZE)) {
TTrace((stderr,
"getRISCOSexfield: block length %u > rest ef_size %u\n", eb_len,
ef_len - EB_HEADSIZE));
break;
}
if (eb_id == EF_SPARK && (eb_len == 24 || eb_len == 20)) {
if (makelong(EB_HEADSIZE + ef_buf) == SPARKID_2) {
return (zvoid *)ef_buf;
}
}
ef_buf += (eb_len + EB_HEADSIZE);
ef_len -= (eb_len + EB_HEADSIZE);
}
return NULL;
}
#endif
