/*
  Copyright (c) 1990-2002 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
*/
/*---------------------------------------------------------------------------

  unzip.c

  UnZip - a zipfile extraction utility.  See below for make instructions, or
  read the comments in Makefile and the various Contents files for more de-
  tailed explanations.  To report a bug, send a *complete* description to
  Zip-Bugs@lists.wku.edu; include machine type, operating system and ver-
  sion, compiler and version, and reasonably detailed error messages or prob-
  lem report.  To join Info-ZIP, see the instructions in README.

  UnZip 5.x is a greatly expanded and partially rewritten successor to 4.x,
  which in turn was almost a complete rewrite of version 3.x.  For a detailed
  revision history, see UnzpHist.zip at quest.jpl.nasa.gov.  For a list of
  the many (near infinite) contributors, see "CONTRIBS" in the UnZip source
  distribution.

  ---------------------------------------------------------------------------

  [from original zipinfo.c]

  This program reads great gobs of totally nifty information, including the
  central directory stuff, from ZIP archives ("zipfiles" for short).  It
  started as just a testbed for fooling with zipfiles, but at this point it
  is actually a useful utility.  It also became the basis for the rewrite of
  UnZip (3.16 -> 4.0), using the central directory for processing rather than
  the individual (local) file headers.

  As of ZipInfo v2.0 and UnZip v5.1, the two programs are combined into one.
  If the executable is named "unzip" (or "unzip.exe", depending), it behaves
  like UnZip by default; if it is named "zipinfo" or "ii", it behaves like
  ZipInfo.  The ZipInfo behavior may also be triggered by use of unzip's -Z
  option; for example, "unzip -Z [zipinfo_options] archive.zip".

  Another dandy product from your buddies at Newtware!

  Author:  Greg Roelofs, newt@pobox.com, http://pobox.com/~newt/
           23 August 1990 -> April 1997

  ---------------------------------------------------------------------------

  Version:  unzip5??.{tar.Z | tar.gz | zip} for Unix, VMS, OS/2, MS-DOS, Amiga,
              Atari, Windows 3.x/95/NT/CE, Macintosh, Human68K, Acorn RISC OS,
              BeOS, SMS/QDOS, VM/CMS, MVS, AOS/VS, Tandem NSK, Theos and
              TOPS-20.

  Copyrights:  see accompanying file "LICENSE" in UnZip source distribution.
               (This software is free but NOT IN THE PUBLIC DOMAIN.)

  ---------------------------------------------------------------------------*/



#define __UNZIP_C       /* identifies this source module */
#define UNZIP_INTERNAL
#include "unzip.h"      /* includes, typedefs, macros, prototypes, etc. */
#include "crypt.h"
#include "unzvers.h"

#ifndef WINDLL          /* The WINDLL port uses windll/windll.c instead... */

/***************************/
/* Local type declarations */
/***************************/

#ifdef REENTRANT
typedef struct _sign_info
    {
        struct _sign_info *previous;
        void (*sighandler)(int);
        int sigtype;
    } savsigs_info;
#endif

/*******************/
/* Local Functions */
/*******************/

#ifdef REENTRANT
static int setsignalhandler OF((__GPRO__ savsigs_info **p_savedhandler_chain,
                                int signal_type, void (*newhandler)(int)));
#endif
#ifndef SFX
static void  show_version_info  OF((__GPRO));
#endif


/*************/
/* Constants */
/*************/

#include "consts.h"  /* all constant global variables are in here */
                     /* (non-constant globals were moved to globals.c) */

/* constant local variables: */

#ifndef SFX
   static ZCONST char Far EnvUnZip[] = ENV_UNZIP;
   static ZCONST char Far EnvUnZip2[] = ENV_UNZIP2;
   static ZCONST char Far EnvZipInfo[] = ENV_ZIPINFO;
   static ZCONST char Far EnvZipInfo2[] = ENV_ZIPINFO2;
#ifdef RISCOS
   static ZCONST char Far EnvUnZipExts[] = ENV_UNZIPEXTS;
#endif /* RISCOS */
  static ZCONST char Far NoMemArguments[] =
    "envargs:  cannot get memory for arguments";
#endif

#ifdef REENTRANT
  static ZCONST char Far CantSaveSigHandler[] =
    "error:  cannot save signal handler settings\n";
#endif

#if (!defined(SFX) || defined(SFX_EXDIR))
   static ZCONST char Far NotExtracting[] =
     "caution:  not extracting; -d ignored\n";
   static ZCONST char Far MustGiveExdir[] =
     "error:  must specify directory to which to extract with -d option\n";
   static ZCONST char Far OnlyOneExdir[] =
     "error:  -d option used more than once (only one exdir allowed)\n";
#endif

#if CRYPT
   static ZCONST char Far MustGivePasswd[] =
     "error:  must give decryption password with -P option\n";
#endif

#ifndef SFX
   static ZCONST char Far Zfirst[] =
   "error:  -Z must be first option for ZipInfo mode (check UNZIP variable?)\n";
#endif
static ZCONST char Far InvalidOptionsMsg[] = "error:\
  -fn or any combination of -c, -l, -p, -t, -u and -v options invalid\n";
static ZCONST char Far IgnoreOOptionMsg[] =
  "caution:  both -n and -o specified; ignoring -o\n";

/* usage() strings */
#ifndef SFX
#ifdef VMS
   static ZCONST char Far Example3[] = "vms.c";
   static ZCONST char Far Example2[] = "  unzip\
 \"-V\" foo \"Bar\" => must quote uppercase options and filenames in VMS\n";
#else /* !VMS */
   static ZCONST char Far Example3[] = "ReadMe";
#ifdef RISCOS
   static ZCONST char Far Example2[] =
"  unzip foo -d RAM:$   => extract all files from foo into RAMDisc\n";
#else /* !RISCOS */
#if (defined(OS2) || (defined(DOS_FLX_OS2_W32) && defined(MORE)))
   static ZCONST char Far Example2[] =
     "";                /* no room:  too many local3[] items */
#else /* !OS2 */
#ifdef MACOS
   static ZCONST char Far Example2[] = ""; /* not needed */
#else /* !MACOS */
   static ZCONST char Far Example2[] = " \
 unzip -p foo | more  => send contents of foo.zip via pipe into program more\n";
#endif /* ?MACOS */
#endif /* ?OS2 */
#endif /* ?RISCOS */
#endif /* ?VMS */

/* local1[]:  command options */
#if (defined(DLL) && defined(API_DOC))
   static ZCONST char Far local1[] =
     "  -A  print extended help for API functions";
#else /* !(DLL && API_DOC) */
   static ZCONST char Far local1[] = "";
#endif /* ?(DLL && API_DOC) */

/* local2[] and local3[]:  modifier options */
#ifdef DOS_FLX_H68_OS2_W32
#ifdef FLEXOS
   static ZCONST char Far local2[] = "";
#else
   static ZCONST char Far local2[] =
     " -$  label removables (-$$ => fixed disks)";
#endif
#ifdef OS2
#ifdef MORE
   static ZCONST char Far local3[] = "\
  -X  restore ACLs if supported              -s  spaces in filenames => '_'\n\
                                             -M  pipe through \"more\" pager\n";
#else
   static ZCONST char Far local3[] = " \
 -X  restore ACLs if supported              -s  spaces in filenames => '_'\n\n";
#endif /* ?MORE */
#else /* !OS2 */
#ifdef WIN32
#ifdef NTSD_EAS
#ifdef MORE
   static ZCONST char Far local3[] = "\
  -X  restore ACLs (-XX => use privileges)   -s  spaces in filenames => '_'\n\
                                             -M  pipe through \"more\" pager\n";
#else
   static ZCONST char Far local3[] = " \
 -X  restore ACLs (-XX => use privileges)   -s  spaces in filenames => '_'\n\n";
#endif /* ?MORE */
#else /* !NTSD_EAS */
#ifdef MORE
   static ZCONST char Far local3[] = "\
  -M  pipe through \"more\" pager            \
  -s  spaces in filenames => '_'\n\n";
#else
   static ZCONST char Far local3[] = " \
                                            -s  spaces in filenames => '_'\n\n";
#endif /* ?MORE */
#endif /* ?NTSD_EAS */
#else /* !WIN32 */
#ifdef MORE
   static ZCONST char Far local3[] = "  -\
M  pipe through \"more\" pager              -s  spaces in filenames => '_'\n\n";
#else
   static ZCONST char Far local3[] = "\
                                             -s  spaces in filenames => '_'\n";
#endif
#endif /* ?WIN32 */
#endif /* ?OS2 || ?WIN32 */
#else /* !DOS_FLX_OS2_W32 */
#ifdef VMS
   static ZCONST char Far local2[] = "\"-X\" restore owner/protection info";
#ifdef MORE
   static ZCONST char Far local3[] = "  \
                                          \"-M\" pipe through \"more\" pager\n";
#else
   static ZCONST char Far local3[] = "\n";
#endif
#else /* !VMS */
#ifdef BEO_UNX
   static ZCONST char Far local2[] = " -X  restore UID/GID info";
#ifdef MORE
   static ZCONST char Far local3[] = "\
                                             -M  pipe through \"more\" pager\n";
#else
   static ZCONST char Far local3[] = "\n";
#endif
#else /* !BEO_UNX */
#ifdef TANDEM
   static ZCONST char Far local2[] = " -X  restore Tandem User ID";
#ifdef MORE
   static ZCONST char Far local3[] = "\
  -b  create 'C' (180) text files            -M  pipe through \"more\" pager\n";
#else
   static ZCONST char Far local3[] = " -b  create 'C' (180) text files\n";
#endif
#else /* !TANDEM */
#ifdef AMIGA
   static ZCONST char Far local2[] = " -N  restore comments as filenotes";
#ifdef MORE
   static ZCONST char Far local3[] = " \
                                            -M  pipe through \"more\" pager\n";
#else
   static ZCONST char Far local3[] = "\n";
#endif
#else /* !AMIGA */
#ifdef MACOS
   static ZCONST char Far local2[] = " -E  show Mac info during extraction";
   static ZCONST char Far local3[] = " \
 -i  ignore filenames in mac extra info     -J  junk (ignore) Mac extra info\n\
\n";
#else /* !MACOS */
#ifdef MORE
   static ZCONST char Far local2[] = " -M  pipe through \"more\" pager";
   static ZCONST char Far local3[] = "\n";
#else
   static ZCONST char Far local2[] = "";   /* Atari, Mac, CMS/MVS etc. */
   static ZCONST char Far local3[] = "";
#endif
#endif /* ?MACOS */
#endif /* ?AMIGA */
#endif /* ?TANDEM */
#endif /* ?BEO_UNX */
#endif /* ?VMS */
#endif /* ?DOS_FLX_OS2_W32 */
#endif /* !SFX */

#ifndef NO_ZIPINFO
#ifdef VMS
   static ZCONST char Far ZipInfoExample[] = "* or % (e.g., \"*font-%.zip\")";
#else
   static ZCONST char Far ZipInfoExample[] = "*, ?, [] (e.g., \"[a-j]*.zip\")";
#endif

static ZCONST char Far ZipInfoUsageLine1[] = "\
ZipInfo %d.%d%d%s of %s, by Greg Roelofs and the Info-ZIP group.\n\
\n\
List name, date/time, attribute, size, compression method, etc., about files\n\
in list (excluding those in xlist) contained in the specified .zip archive(s).\
\n\"file[.zip]\" may be a wildcard name containing %s.\n\n\
   usage:  zipinfo [-12smlvChMtTz] file[.zip] [list...] [-x xlist...]\n\
      or:  unzip %s-Z%s [-12smlvChMtTz] file[.zip] [list...] [-x xlist...]\n";

static ZCONST char Far ZipInfoUsageLine2[] = "\nmain\
 listing-format options:             -s  short Unix \"ls -l\" format (def.)\n\
  -1  filenames ONLY, one per line       -m  medium Unix \"ls -l\" format\n\
  -2  just filenames but allow -h/-t/-z  -l  long Unix \"ls -l\" format\n\
                                         -v  verbose, multi-page format\n";

static ZCONST char Far ZipInfoUsageLine3[] = "miscellaneous options:\n\
  -h  print header line       -t  print totals for listed files or for all\n\
  -z  print zipfile comment  %c-T%c print file times in sortable decimal format\
\n %c-C%c be case-insensitive   %s\
  -x  exclude filenames that follow from listing\n";
#ifdef MORE
#ifdef VMS
   static ZCONST char Far ZipInfoUsageLine4[] =
     " \"-M\" page output through built-in \"more\"\n";
#else
   static ZCONST char Far ZipInfoUsageLine4[] =
     "  -M  page output through built-in \"more\"\n";
#endif
#else /* !MORE */
   static ZCONST char Far ZipInfoUsageLine4[] = "";
#endif /* ?MORE */
#endif /* !NO_ZIPINFO */

#ifdef BETA
#  ifdef VMSCLI
   /* BetaVersion[] is also used in vms/cmdline.c:  do not make it static */
     ZCONST char Far BetaVersion[] = "%s\
        THIS IS STILL A BETA VERSION OF UNZIP%s -- DO NOT DISTRIBUTE.\n\n";
#  else
     static ZCONST char Far BetaVersion[] = "%s\
        THIS IS STILL A BETA VERSION OF UNZIP%s -- DO NOT DISTRIBUTE.\n\n";
#  endif
#endif

#ifdef SFX
#  ifdef VMSCLI
   /* UnzipSFXBanner[] is also used in vms/cmdline.c:  do not make it static */
     ZCONST char Far UnzipSFXBanner[] =
#  else
     static ZCONST char Far UnzipSFXBanner[] =
#  endif
     "UnZipSFX %d.%d%d%s of %s, by Info-ZIP (Zip-Bugs@lists.wku.edu).\n";
#  ifdef SFX_EXDIR
     static ZCONST char Far UnzipSFXOpts[] =
    "Valid options are -tfupcz and -d <exdir>; modifiers are -abjnoqCL%sV%s.\n";
#  else
     static ZCONST char Far UnzipSFXOpts[] =
       "Valid options are -tfupcz; modifiers are -abjnoqCL%sV%s.\n";
#  endif
#else /* !SFX */
   static ZCONST char Far CompileOptions[] =
     "UnZip special compilation options:\n";
   static ZCONST char Far CompileOptFormat[] = "\t%s\n";
   static ZCONST char Far EnvOptions[] =
     "\nUnZip and ZipInfo environment options:\n";
   static ZCONST char Far EnvOptFormat[] = "%16s:  %s\n";
   static ZCONST char Far None[] = "[none]";
#  ifdef ACORN_FTYPE_NFS
     static ZCONST char Far AcornFtypeNFS[] = "ACORN_FTYPE_NFS";
#  endif
#  ifdef ASM_CRC
     static ZCONST char Far AsmCRC[] = "ASM_CRC";
#  endif
#  ifdef ASM_INFLATECODES
     static ZCONST char Far AsmInflateCodes[] = "ASM_INFLATECODES";
#  endif
#  ifdef CHECK_VERSIONS
     static ZCONST char Far Check_Versions[] = "CHECK_VERSIONS";
#  endif
#  ifdef COPYRIGHT_CLEAN
     static ZCONST char Far Copyright_Clean[] =
     "COPYRIGHT_CLEAN (PKZIP 0.9x unreducing method not supported)";
#  endif
#  ifdef DEBUG
     static ZCONST char Far UDebug[] = "DEBUG";
#  endif
#  ifdef DEBUG_TIME
     static ZCONST char Far DebugTime[] = "DEBUG_TIME";
#  endif
#  ifdef DLL
     static ZCONST char Far Dll[] = "DLL";
#  endif
#  ifdef DOSWILD
     static ZCONST char Far DosWild[] = "DOSWILD";
#  endif
#  ifdef LZW_CLEAN
     static ZCONST char Far LZW_Clean[] =
     "LZW_CLEAN (PKZIP/Zip 1.x unshrinking method not supported)";
#  endif
#  ifndef MORE
     static ZCONST char Far No_More[] = "NO_MORE";
#  endif
#  ifdef NO_ZIPINFO
     static ZCONST char Far No_ZipInfo[] = "NO_ZIPINFO";
#  endif
#  ifdef NTSD_EAS
     static ZCONST char Far NTSDExtAttrib[] = "NTSD_EAS";
#  endif
#  ifdef OLD_THEOS_EXTRA
     static ZCONST char Far OldTheosExtra[] =
     "OLD_THEOS_EXTRA (handle also old Theos port extra field)";
#  endif
#  ifdef OS2_EAS
     static ZCONST char Far OS2ExtAttrib[] = "OS2_EAS";
#  endif
#  ifdef QLZIP
     static ZCONST char Far SMSExFldOnUnix[] = "QLZIP";
#  endif
#  ifdef REENTRANT
     static ZCONST char Far Reentrant[] = "REENTRANT";
#  endif
#  ifdef REGARGS
     static ZCONST char Far RegArgs[] = "REGARGS";
#  endif
#  ifdef RETURN_CODES
     static ZCONST char Far Return_Codes[] = "RETURN_CODES";
#  endif
#  ifdef SET_DIR_ATTRIB
     static ZCONST char Far SetDirAttrib[] = "SET_DIR_ATTRIB";
#  endif
#  ifdef TIMESTAMP
     static ZCONST char Far TimeStamp[] = "TIMESTAMP";
#  endif
#  ifdef UNIXBACKUP
     static ZCONST char Far UnixBackup[] = "UNIXBACKUP";
#  endif
#  ifdef USE_EF_UT_TIME
     static ZCONST char Far Use_EF_UT_time[] = "USE_EF_UT_TIME";
#  endif
#  ifndef LZW_CLEAN
     static ZCONST char Far Use_Unshrink[] =
     "USE_UNSHRINK (PKZIP/Zip 1.x unshrinking method supported)";
#  endif
#  ifndef COPYRIGHT_CLEAN
     static ZCONST char Far Use_Smith_Code[] =
     "USE_SMITH_CODE (PKZIP 0.9x unreducing method supported)";
#  endif
#  ifdef USE_DEFLATE64
     static ZCONST char Far Use_Deflate64[] =
     "USE_DEFLATE64 (PKZIP 4.x Deflate64(tm) supported)";
#  endif
#  ifdef MULT_VOLUME
     static ZCONST char Far Use_MultiVol[] =
     "MULT_VOLUME (multi-volume archives supported)";
#  endif
#  if (defined(__DJGPP__) && (__DJGPP__ >= 2))
#    ifdef USE_DJGPP_ENV
       static ZCONST char Far Use_DJGPP_Env[] = "USE_DJGPP_ENV";
#    endif
#    ifdef USE_DJGPP_GLOB
       static ZCONST char Far Use_DJGPP_Glob[] = "USE_DJGPP_GLOB";
#    endif
#  endif /* __DJGPP__ && (__DJGPP__ >= 2) */
#  ifdef USE_VFAT
     static ZCONST char Far Use_VFAT_support[] = "USE_VFAT";
#  endif
#  ifdef USE_ZLIB
     static ZCONST char Far UseZlib[] =
     "USE_ZLIB (compiled with version %s; using version %s)";
#  endif
#  ifdef VMS_TEXT_CONV
     static ZCONST char Far VmsTextConv[] = "VMS_TEXT_CONV";
#  endif
#  ifdef VMSCLI
     static ZCONST char Far VmsCLI[] = "VMSCLI";
#  endif
#  ifdef VMSWILD
     static ZCONST char Far VmsWild[] = "VMSWILD";
#  endif
#  ifdef WILD_STOP_AT_DIR
     static ZCONST char Far WildStopAtDir[] = "WILD_STOP_AT_DIR";
#  endif
#  if CRYPT
#    ifdef PASSWD_FROM_STDIN
       static ZCONST char Far PasswdStdin[] = "PASSWD_FROM_STDIN";
#    endif
     static ZCONST char Far Decryption[] =
       "\t[decryption, version %d.%d%s of %s]\n";
     static ZCONST char Far CryptDate[] = CR_VERSION_DATE;
#  endif
#  ifndef __RSXNT__
#    ifdef __EMX__
       static ZCONST char Far EnvEMX[] = "EMX";
       static ZCONST char Far EnvEMXOPT[] = "EMXOPT";
#    endif
#    if (defined(__GO32__) && (!defined(__DJGPP__) || (__DJGPP__ < 2)))
       static ZCONST char Far EnvGO32[] = "GO32";
       static ZCONST char Far EnvGO32TMP[] = "GO32TMP";
#    endif
#  endif /* !__RSXNT__ */

#ifdef VMS
/* UnzipUsageLine1[] is also used in vms/cmdline.c:  do not make it static */
   ZCONST char Far UnzipUsageLine1[] = "\
UnZip %d.%d%d%s of %s, by Info-ZIP.  For more details see: unzip -v.\n\n";
#ifdef COPYRIGHT_CLEAN
   static ZCONST char Far UnzipUsageLine1v[] = "\
UnZip %d.%d%d%s of %s, by Info-ZIP.  Maintained by C. Spieler.  Send\n\
bug reports to the authors at Zip-Bugs@lists.wku.edu; see README for details.\
\n\n";
#else
   static ZCONST char Far UnzipUsageLine1v[] = "\
UnZip %d.%d%d%s of %s, by Info-ZIP.  UnReduce (c) 1989 by S. H. Smith.\n\
Send bug reports to authors at Zip-Bugs@lists.wku.edu; see README for details.\
\n\n";
#endif /* ?COPYRIGHT_CLEAN */
#else /* !VMS */
#ifdef COPYRIGHT_CLEAN
   static ZCONST char Far UnzipUsageLine1[] = "\
UnZip %d.%d%d%s of %s, by Info-ZIP.  Maintained by C. Spieler.  Send\n\
bug reports to the authors at Zip-Bugs@lists.wku.edu; see README for details.\
\n\n";
#else
   static ZCONST char Far UnzipUsageLine1[] = "\
UnZip %d.%d%d%s of %s, by Info-ZIP.  UnReduce (c) 1989 by S. H. Smith.\n\
Send bug reports to authors at Zip-Bugs@lists.wku.edu; see README for details.\
\n\n";
#endif /* ?COPYRIGHT_CLEAN */
#define UnzipUsageLine1v        UnzipUsageLine1
#endif /* ?VMS */

static ZCONST char Far UnzipUsageLine2v[] = "\
Latest sources and executables are at ftp://ftp.info-zip.org/pub/infozip/ ;\
\nsee ftp://ftp.info-zip.org/pub/infozip/UnZip.html for other sites.\
\n\n";

#ifdef MACOS
static ZCONST char Far UnzipUsageLine2[] = "\
Usage: unzip %s[-opts[modifiers]] file[.zip] [list] [-d exdir]\n \
 Default action is to extract files in list, to exdir;\n\
  file[.zip] may be a wildcard.  %s\n";
#else /* !MACOS */
#ifdef VM_CMS
static ZCONST char Far UnzipUsageLine2[] = "\
Usage: unzip %s[-opts[modifiers]] file[.zip] [list] [-x xlist] [-d fm]\n \
 Default action is to extract files in list, except those in xlist, to disk fm;\
\n  file[.zip] may be a wildcard.  %s\n";
#else /* !VM_CMS */
static ZCONST char Far UnzipUsageLine2[] = "\
Usage: unzip %s[-opts[modifiers]] file[.zip] [list] [-x xlist] [-d exdir]\n \
 Default action is to extract files in list, except those in xlist, to exdir;\n\
  file[.zip] may be a wildcard.  %s\n";
#endif /* ?VM_CMS */
#endif /* ?MACOS */

#ifdef NO_ZIPINFO
#  define ZIPINFO_MODE_OPTION  ""
   static ZCONST char Far ZipInfoMode[] =
     "(ZipInfo mode is disabled in this version.)";
#else
#  define ZIPINFO_MODE_OPTION  "[-Z] "
#  ifdef VMS
     static ZCONST char Far ZipInfoMode[] =
       "\"-Z\" => ZipInfo mode (`unzip \"-Z\"' for usage).";
#  else
     static ZCONST char Far ZipInfoMode[] =
       "-Z => ZipInfo mode (\"unzip -Z\" for usage).";
#  endif
#endif /* ?NO_ZIPINFO */

#ifdef VMS
   static ZCONST char Far VMSusageLine2b[] = "\
=> define foreign command symbol in LOGIN.COM:  $ unzip :== $dev:[dir]unzip.exe\
\n";
#endif

#ifdef MACOS
static ZCONST char Far UnzipUsageLine3[] = "\n\
  -d  extract files into exdir               -l  list files (short format)\n\
  -f  freshen existing files, create none    -t  test compressed archive data\n\
  -u  update files, create if necessary      -z  display archive comment\n\
%s\n";
#else /* !MACOS */
#ifdef VM_CMS
static ZCONST char Far UnzipUsageLine3[] = "\n\
  -p  extract files to pipe, no messages     -l  list files (short format)\n\
  -f  freshen existing files, create none    -t  test compressed archive data\n\
  -u  update files, create if necessary      -z  display archive comment\n\
  -x  exclude files that follow (in xlist)   -d  extract files onto disk fm\n\
%s\n";
#else /* !VM_CMS */
static ZCONST char Far UnzipUsageLine3[] = "\n\
  -p  extract files to pipe, no messages     -l  list files (short format)\n\
  -f  freshen existing files, create none    -t  test compressed archive data\n\
  -u  update files, create if necessary      -z  display archive comment\n\
  -x  exclude files that follow (in xlist)   -d  extract files into exdir\n\
%s\n";
#endif /* ?VM_CMS */
#endif /* ?MACOS */

static ZCONST char Far UnzipUsageLine4[] = "\
modifiers:                                   -q  quiet mode (-qq => quieter)\n\
  -n  never overwrite existing files         -a  auto-convert any text files\n\
  -o  overwrite files WITHOUT prompting      -aa treat ALL files as text\n \
 -j  junk paths (do not make directories)   -v  be verbose/print version info\n\
 %c-C%c match filenames case-insensitively    %c-L%c make (some) names \
lowercase\n %-42s %c-V%c retain VMS version numbers\n%s";

static ZCONST char Far UnzipUsageLine5[] = "\
Examples (see unzip.txt for more info):\n\
  unzip data1 -x joe   => extract all files except joe from zipfile data1.zip\n\
%s\
  unzip -fo foo %-6s => quietly replace existing %s if archive file newer\n";
#endif /* ?SFX */





/*****************************/
/*  main() / UzpMain() stub  */
/*****************************/

int MAIN(argc, argv)   /* return PK-type error code (except under VMS) */
    int argc;
    char *argv[];
{
    int r;

    CONSTRUCTGLOBALS();
    r = unzip(__G__ argc, argv);
    DESTROYGLOBALS();
    RETURN(r);
}




/*******************************/
/*  Primary UnZip entry point  */
/*******************************/

int unzip(__G__ argc, argv)
    __GDEF
    int argc;
    char *argv[];
{
#ifndef NO_ZIPINFO
    char *p;
#endif
#ifdef DOS_FLX_H68_NLM_OS2_W32
    int i;
#endif
    int retcode, error=FALSE;
#ifdef REENTRANT
    savsigs_info *oldsighandlers = NULL;
#   define SET_SIGHANDLER(sigtype, newsighandler) \
      if ((retcode = setsignalhandler(__G__ &oldsighandlers, (sigtype), \
                                      (newsighandler))) > PK_WARN) \
          goto cleanup_and_exit
#else
#   define SET_SIGHANDLER(sigtype, newsighandler) \
      signal((sigtype), (newsighandler))
#endif

    SETLOCALE(LC_CTYPE,"");

#if (defined(__IBMC__) && defined(__DEBUG_ALLOC__))
    extern void DebugMalloc(void);

    atexit(DebugMalloc);
#endif

#ifdef MALLOC_WORK
    /* The following (rather complex) expression determines the allocation
       size of the decompression work area.  It simulates what the
       combined "union" and "struct" declaration of the "static" work
       area reservation achieves automatically at compile time.
       Any decent compiler should evaluate this expression completely at
       compile time and provide constants to the zcalloc() call.
       (For better readability, some subexpressions are encapsulated
       in temporarly defined macros.)
     */
#   define UZ_SLIDE_CHUNK (sizeof(shrint)+sizeof(uch)+sizeof(uch))
#   define UZ_NUMOF_CHUNKS \
      (unsigned)(((WSIZE+UZ_SLIDE_CHUNK-1)/UZ_SLIDE_CHUNK > HSIZE) ? \
                 (WSIZE+UZ_SLIDE_CHUNK-1)/UZ_SLIDE_CHUNK : HSIZE)
    G.area.Slide = (uch *)zcalloc(UZ_NUMOF_CHUNKS, UZ_SLIDE_CHUNK);
#   undef UZ_SLIDE_CHUNK
#   undef UZ_NUMOF_CHUNKS
    G.area.shrink.Parent = (shrint *)G.area.Slide;
    G.area.shrink.value = G.area.Slide + (sizeof(shrint)*(HSIZE));
    G.area.shrink.Stack = G.area.Slide +
                           (sizeof(shrint) + sizeof(uch))*(HSIZE);
#endif

/*---------------------------------------------------------------------------
    Set signal handler for restoring echo, warn of zipfile corruption, etc.
  ---------------------------------------------------------------------------*/

#ifdef SIGINT
    SET_SIGHANDLER(SIGINT, handler);
#endif
#ifdef SIGTERM                 /* some systems really have no SIGTERM */
    SET_SIGHANDLER(SIGTERM, handler);
#endif
#ifdef SIGBUS
    SET_SIGHANDLER(SIGBUS, handler);
#endif
#ifdef SIGSEGV
    SET_SIGHANDLER(SIGSEGV, handler);
#endif

#if (defined(WIN32) && defined(__RSXNT__))
    for (i = 0 ; i < argc; i++) {
       _ISO_INTERN(argv[i]);
    }
#endif

/*---------------------------------------------------------------------------
    Macintosh initialization code.
  ---------------------------------------------------------------------------*/

#ifdef MACOS
    {
        int a;

        for (a = 0;  a < 4;  ++a)
            G.rghCursor[a] = GetCursor(a+128);
        G.giCursor = 0;
    }
#endif

/*---------------------------------------------------------------------------
    NetWare initialization code.
  ---------------------------------------------------------------------------*/

#ifdef NLM
    InitUnZipConsole();
#endif

/*---------------------------------------------------------------------------
    Acorn RISC OS initialization code.
  ---------------------------------------------------------------------------*/

#ifdef RISCOS
    set_prefix();
#endif

/*---------------------------------------------------------------------------
    Theos initialization code.
  ---------------------------------------------------------------------------*/

#ifdef THEOS
    /* The easiest way found to force creation of libraries when selected
     * members are to be unzipped. Explicitely add libraries names to the
     * arguments list before the first member of the library.
     */
    if (! _setargv(&argc, &argv)) {
        Info(slide, 0x401, ((char *)slide, "cannot process argv\n"));
        retcode = PK_MEM;
        goto cleanup_and_exit;
    }
#endif

/*---------------------------------------------------------------------------
    First figure out if we're running in UnZip mode or ZipInfo mode, and put
    the appropriate environment-variable options into the queue.  Then rip
    through any command-line options lurking about...
  ---------------------------------------------------------------------------*/

#ifdef SFX
    G.argv0 = argv[0];
#if (defined(OS2) || defined(WIN32))
    G.zipfn = GetLoadPath(__G);/* non-MSC NT puts path into G.filename[] */
#else
    G.zipfn = G.argv0;
#endif

#ifdef VMSCLI
    {
        ulg status = vms_unzip_cmdline(&argc, &argv);
        if (!(status & 1)) {
            retcode = (int)status;
            goto cleanup_and_exit;
        }
    }
#endif /* VMSCLI */

    uO.zipinfo_mode = FALSE;
    error = uz_opts(__G__ &argc, &argv);   /* UnZipSFX call only */

#else /* !SFX */

#ifdef RISCOS
    /* get the extensions to swap from environment */
    getRISCOSexts(ENV_UNZIPEXTS);
#endif

#ifdef MSDOS
    /* extract MKS extended argument list from environment (before envargs!) */
    mksargs(&argc, &argv);
#endif

#ifdef VMSCLI
    {
        ulg status = vms_unzip_cmdline(&argc, &argv);
        if (!(status & 1)) {
            retcode = (int)status;
            goto cleanup_and_exit;
        }
    }
#endif /* VMSCLI */

    G.noargs = (argc == 1);   /* no options, no zipfile, no anything */

#ifndef NO_ZIPINFO
    for (p = argv[0] + strlen(argv[0]); p >= argv[0]; --p) {
        if (*p == DIR_END
#ifdef DIR_END2
            || *p == DIR_END2
#endif
           )
            break;
    }
    ++p;

#ifdef THEOS
    if (strncmp(p, "ZIPINFO.",8) == 0 || strstr(p, ".ZIPINFO:") != NULL ||
        strncmp(p, "II.",3) == 0 || strstr(p, ".II:") != NULL ||
#else
    if (STRNICMP(p, LoadFarStringSmall(Zipnfo), 7) == 0 ||
        STRNICMP(p, "ii", 2) == 0 ||
#endif
        (argc > 1 && strncmp(argv[1], "-Z", 2) == 0))
    {
        uO.zipinfo_mode = TRUE;
        if ((error = envargs(&argc, &argv, LoadFarStringSmall(EnvZipInfo),
                             LoadFarStringSmall2(EnvZipInfo2))) != PK_OK)
            perror(LoadFarString(NoMemArguments));
        else
            error = zi_opts(__G__ &argc, &argv);
    } else
#endif /* NO_ZIPINFO */
    {
        uO.zipinfo_mode = FALSE;
        if ((error = envargs(&argc, &argv, LoadFarStringSmall(EnvUnZip),
                             LoadFarStringSmall2(EnvUnZip2))) != PK_OK)
            perror(LoadFarString(NoMemArguments));
        else
            error = uz_opts(__G__ &argc, &argv);
    }

#endif /* ?SFX */

    if ((argc < 0) || error) {
        retcode = error;
        goto cleanup_and_exit;
    }

/*---------------------------------------------------------------------------
    Now get the zipfile name from the command line and then process any re-
    maining options and file specifications.
  ---------------------------------------------------------------------------*/

#ifdef DOS_FLX_H68_NLM_OS2_W32
    /* convert MSDOS-style 'backward slash' directory separators to Unix-style
     * 'forward slashes' for user's convenience (include zipfile name itself)
     */
#ifdef SFX
    for (G.pfnames = argv, i = argc;  i > 0;  --i) {
#else
    /* argc does not include the zipfile specification */
    for (G.pfnames = argv, i = argc+1;  i > 0;  --i) {
#endif
#ifdef __human68k__
        extern char *_toslash(char *);
        _toslash(*G.pfnames);
#else /* !__human68k__ */
        char *q;

        for (q = *G.pfnames;  *q;  ++q)
            if (*q == '\\')
                *q = '/';
        ++G.pfnames;
#endif /* ?__human68k__ */
    }
#endif /* DOS_FLX_H68_NLM_OS2_W32 */

#ifndef SFX
    G.wildzipfn = *argv++;
#endif

#if (defined(SFX) && !defined(SFX_EXDIR)) /* only check for -x */

    G.filespecs = argc;
    G.xfilespecs = 0;

    if (argc > 0) {
        char **pp = argv-1;

        G.pfnames = argv;
        while (*++pp)
            if (strcmp(*pp, "-x") == 0) {
                if (pp > argv) {
                    *pp = 0;              /* terminate G.pfnames */
                    G.filespecs = pp - G.pfnames;
                } else {
                    G.pfnames = (char **)fnames;  /* defaults */
                    G.filespecs = 0;
                }
                G.pxnames = pp + 1;      /* excluded-names ptr: _after_ -x */
                G.xfilespecs = argc - G.filespecs - 1;
                break;                    /* skip rest of args */
            }
        G.process_all_files = FALSE;
    } else
        G.process_all_files = TRUE;      /* for speed */

#else /* !SFX || SFX_EXDIR */             /* check for -x or -d */

    G.filespecs = argc;
    G.xfilespecs = 0;

    if (argc > 0) {
        int in_files=FALSE, in_xfiles=FALSE;
        char **pp = argv-1;

        G.process_all_files = FALSE;
        G.pfnames = argv;
        while (*++pp) {
            Trace((stderr, "pp - argv = %d\n", pp-argv));
#ifdef CMS_MVS
            if (!uO.exdir && STRNICMP(*pp, "-d", 2) == 0) {
#else
            if (!uO.exdir && strncmp(*pp, "-d", 2) == 0) {
#endif
                int firstarg = (pp == argv);

                uO.exdir = (*pp) + 2;
                if (in_files) {      /* ... zipfile ... -d exdir ... */
                    *pp = (char *)NULL;         /* terminate G.pfnames */
                    G.filespecs = pp - G.pfnames;
                    in_files = FALSE;
                } else if (in_xfiles) {
                    *pp = (char *)NULL;         /* terminate G.pxnames */
                    G.xfilespecs = pp - G.pxnames;
                    /* "... -x xlist -d exdir":  nothing left */
                }
                /* first check for "-dexdir", then for "-d exdir" */
                if (*uO.exdir == '\0') {
                    if (*++pp)
                        uO.exdir = *pp;
                    else {
                        Info(slide, 0x401, ((char *)slide,
                          LoadFarString(MustGiveExdir)));
                        /* don't extract here by accident */
                        retcode = PK_PARAM;
                        goto cleanup_and_exit;
                    }
                }
                if (firstarg) { /* ... zipfile -d exdir ... */
                    if (pp[1]) {
                        G.pfnames = pp + 1;  /* argv+2 */
                        G.filespecs = argc - (G.pfnames-argv);  /* for now... */
                    } else {
                        G.process_all_files = TRUE;
                        G.pfnames = (char **)fnames;  /* GRR: necessary? */
                        G.filespecs = 0;     /* GRR: necessary? */
                        break;
                    }
                }
            } else if (!in_xfiles) {
                if (strcmp(*pp, "-x") == 0) {
                    in_xfiles = TRUE;
                    if (pp == G.pfnames) {
                        G.pfnames = (char **)fnames;  /* defaults */
                        G.filespecs = 0;
                    } else if (in_files) {
                        *pp = 0;                   /* terminate G.pfnames */
                        G.filespecs = pp - G.pfnames;  /* adjust count */
                        in_files = FALSE;
                    }
                    G.pxnames = pp + 1; /* excluded-names ptr starts after -x */
                    G.xfilespecs = argc - (G.pxnames-argv);  /* anything left */
                } else
                    in_files = TRUE;
            }
        }
    } else
        G.process_all_files = TRUE;      /* for speed */

    if (uO.exdir != (char *)NULL && !G.extract_flag)    /* -d ignored */
        Info(slide, 0x401, ((char *)slide, LoadFarString(NotExtracting)));
#endif /* ?(SFX && !SFX_EXDIR) */

/*---------------------------------------------------------------------------
    Okey dokey, we have everything we need to get started.  Let's roll.
  ---------------------------------------------------------------------------*/

    retcode = process_zipfiles(__G);

cleanup_and_exit:
#ifdef REENTRANT
    /* restore all signal handlers back to their state at function entry */
    while (oldsighandlers != NULL) {
        savsigs_info *thissigsav = oldsighandlers;

        signal(thissigsav->sigtype, thissigsav->sighandler);
        oldsighandlers = thissigsav->previous;
        free(thissigsav);
    }
#endif
#if (defined(MALLOC_WORK) && !defined(REENTRANT))
    if (G.area.Slide != (uch *)NULL) {
        free(G.area.Slide);
        G.area.Slide = (uch *)NULL;
    }
#endif
    return(retcode);

} /* end main()/unzip() */





#ifdef REENTRANT
/*******************************/
/* Function setsignalhandler() */
/*******************************/

static int setsignalhandler(__G__ p_savedhandler_chain, signal_type,
                            newhandler)
    __GDEF
    savsigs_info **p_savedhandler_chain;
    int signal_type;
    void (*newhandler)(int);
{
    savsigs_info *savsig;

    savsig = malloc(sizeof(savsigs_info));
    if (savsig == NULL) {
        /* error message and break */
        Info(slide, 0x401, ((char *)slide, LoadFarString(CantSaveSigHandler)));
        return PK_MEM;
    }
    savsig->sigtype = signal_type;
    savsig->sighandler = signal(SIGINT, newhandler);
    if (savsig->sighandler == SIG_ERR) {
        free(savsig);
    } else {
        savsig->previous = *p_savedhandler_chain;
        *p_savedhandler_chain = savsig;
    }
    return PK_OK;

} /* end function setsignalhandler() */

#endif /* REENTRANT */





/**********************/
/* Function uz_opts() */
/**********************/

int uz_opts(__G__ pargc, pargv)
    __GDEF
    int *pargc;
    char ***pargv;
{
    char **argv, *s;
    int argc, c, error=FALSE, negative=0;


    argc = *pargc;
    argv = *pargv;

    while (++argv, (--argc > 0 && *argv != NULL && **argv == '-')) {
        s = *argv + 1;
        while ((c = *s++) != 0) {    /* "!= 0":  prevent Turbo C warning */
#ifdef CMS_MVS
            switch (tolower(c))
#else
            switch (c)
#endif
            {
                case ('-'):
                    ++negative;
                    break;
#ifdef RISCOS
                case ('/'):
                    if (negative) {   /* negative not allowed with -/ swap */
                        Info(slide, 0x401, ((char *)slide,
                          "error:  must give extensions list"));
                        return(PK_PARAM);  /* don't extract here by accident */
                    }
                    exts2swap = s; /* override Unzip$Exts */
                    s += strlen(s);
                    break;
#endif
                case ('a'):
                    if (negative) {
                        uO.aflag = MAX(uO.aflag-negative,0);
                        negative = 0;
                    } else
                        ++uO.aflag;
                    break;
#if (defined(DLL) && defined(API_DOC))
                case ('A'):    /* extended help for API */
                    APIhelp(__G__ argc, argv);
                    *pargc = -1;  /* signal to exit successfully */
                    return 0;
#endif
                case ('b'):
                    if (negative) {
#if (defined(TANDEM) || defined(VMS))
                        uO.bflag = MAX(uO.bflag-negative,0);
#endif
                        negative = 0;   /* do nothing:  "-b" is default */
                    } else {
#ifdef VMS
                        if (uO.aflag == 0)
                           ++uO.bflag;
#endif
#ifdef TANDEM
                        ++uO.bflag;
#endif
                        uO.aflag = 0;
                    }
                    break;
#ifdef UNIXBACKUP
                case ('B'): /* -B: back up existing files */
                    if (negative)
                        uO.B_flag = FALSE, negative = 0;
                    else
                        uO.B_flag = TRUE;
                    break;
#endif
                case ('c'):
                    if (negative) {
                        uO.cflag = FALSE, negative = 0;
#ifdef NATIVE
                        uO.aflag = 0;
#endif
                    } else {
                        uO.cflag = TRUE;
#ifdef NATIVE
                        uO.aflag = 2;   /* so you can read it on the screen */
#endif
#ifdef DLL
                        if (G.redirect_text)
                            G.redirect_data = 2;
#endif
                    }
                    break;
#ifndef CMS_MVS
                case ('C'):    /* -C:  match filenames case-insensitively */
                    if (negative)
                        uO.C_flag = FALSE, negative = 0;
                    else
                        uO.C_flag = TRUE;
                    break;
#endif /* !CMS_MVS */
#if (!defined(SFX) || defined(SFX_EXDIR))
                case ('d'):
                    if (negative) {   /* negative not allowed with -d exdir */
                        Info(slide, 0x401, ((char *)slide,
                          LoadFarString(MustGiveExdir)));
                        return(PK_PARAM);  /* don't extract here by accident */
                    }
                    if (uO.exdir != (char *)NULL) {
                        Info(slide, 0x401, ((char *)slide,
                          LoadFarString(OnlyOneExdir)));
                        return(PK_PARAM);    /* GRR:  stupid restriction? */
                    } else {
                        /* first check for "-dexdir", then for "-d exdir" */
                        uO.exdir = s;
                        if (*uO.exdir == '\0') {
                            if (argc > 1) {
                                --argc;
                                uO.exdir = *++argv;
                                if (*uO.exdir == '-') {
                                    Info(slide, 0x401, ((char *)slide,
                                      LoadFarString(MustGiveExdir)));
                                    return(PK_PARAM);
                                }
                                /* else uO.exdir points at extraction dir */
                            } else {
                                Info(slide, 0x401, ((char *)slide,
                                  LoadFarString(MustGiveExdir)));
                                return(PK_PARAM);
                            }
                        }
                        /* uO.exdir now points at extraction dir (-dexdir or
                         *  -d exdir); point s at end of exdir to avoid mis-
                         *  interpretation of exdir characters as more options
                         */
                        if (*s != 0)
                            while (*++s != 0)
                                ;
                    }
                    break;
#endif /* !SFX || SFX_EXDIR */
                case ('e'):    /* just ignore -e, -x options (extract) */
                    break;
#ifdef MACOS
                case ('E'): /* -E [MacOS] display Mac e.f. when restoring */
                    if( negative ) {
                        uO.E_flag = FALSE, negative = 0;
                    } else {
                        uO.E_flag = TRUE;
                    }
                    break;
#endif /* MACOS */
                case ('f'):    /* "freshen" (extract only newer files) */
                    if (negative)
                        uO.fflag = uO.uflag = FALSE, negative = 0;
                    else
                        uO.fflag = uO.uflag = TRUE;
                    break;
#if (defined(RISCOS) || defined(ACORN_FTYPE_NFS))
                case ('F'):    /* Acorn filetype & NFS extension handling */
                    if (negative)
                        uO.acorn_nfs_ext = FALSE, negative = 0;
                    else
                        uO.acorn_nfs_ext = TRUE;
                    break;
#endif /* RISCOS || ACORN_FTYPE_NFS */
                case ('h'):    /* just print help message and quit */
                    *pargc = -1;
                    return USAGE(PK_OK);
#ifdef MACOS
                case ('i'): /* -i [MacOS] ignore filenames stored in Mac ef */
                    if( negative ) {
                        uO.i_flag = FALSE, negative = 0;
                    } else {
                        uO.i_flag = TRUE;
                    }
                    break;
#endif  /* MACOS */
                case ('j'):    /* junk pathnames/directory structure */
                    if (negative)
                        uO.jflag = FALSE, negative = 0;
                    else
                        uO.jflag = TRUE;
                    break;
#if ((defined(__BEOS__) || defined(__HAIKU__)) || defined(MACOS) || defined(HAS_JUNK_EXTRA_FIELD_OPTION))
                case ('J'):    /* Junk BeOS or MacOS file attributes */
                    if( negative ) {
                        uO.J_flag = FALSE, negative = 0;
                    } else {
                        uO.J_flag = TRUE;
                    }
                    break;
#endif /* __BEOS__ || MACOS */
#ifndef SFX
                case ('l'):
                    if (negative) {
                        uO.vflag = MAX(uO.vflag-negative,0);
                        negative = 0;
                    } else
                        ++uO.vflag;
                    break;
#endif /* !SFX */
#ifndef CMS_MVS
                case ('L'):    /* convert (some) filenames to lowercase */
                    if (negative) {
                        uO.L_flag = MAX(uO.L_flag-negative,0);
                        negative = 0;
                    } else
                        ++uO.L_flag;
                    break;
#endif /* !CMS_MVS */
#ifdef MORE
#ifdef CMS_MVS
                case ('m'):
#endif
                case ('M'):    /* send all screen output through "more" fn. */
/* GRR:  eventually check for numerical argument => height */
                    if (negative)
                        G.M_flag = FALSE, negative = 0;
                    else
                        G.M_flag = TRUE;
                    break;
#endif /* MORE */
                case ('n'):    /* don't overwrite any files */
                    if (negative)
                        uO.overwrite_none = FALSE, negative = 0;
                    else
                        uO.overwrite_none = TRUE;
                    break;
#ifdef AMIGA
                case ('N'):    /* restore comments as filenotes */
                    if (negative)
                        uO.N_flag = FALSE, negative = 0;
                    else
                        uO.N_flag = TRUE;
                    break;
#endif /* AMIGA */
                case ('o'):    /* OK to overwrite files without prompting */
                    if (negative) {
                        uO.overwrite_all = MAX(uO.overwrite_all-negative,0);
                        negative = 0;
                    } else
                        ++uO.overwrite_all;
                    break;
                case ('p'):    /* pipes:  extract to stdout, no messages */
                    if (negative) {
                        uO.cflag = FALSE;
                        uO.qflag = MAX(uO.qflag-999,0);
                        negative = 0;
                    } else {
                        uO.cflag = TRUE;
                        uO.qflag += 999;
                    }
                    break;
#if CRYPT
                /* GRR:  yes, this is highly insecure, but dozens of people
                 * have pestered us for this, so here we go... */
                case ('P'):
                    if (negative) {   /* negative not allowed with -P passwd */
                        Info(slide, 0x401, ((char *)slide,
                          LoadFarString(MustGivePasswd)));
                        return(PK_PARAM);  /* don't extract here by accident */
                    }
                    if (uO.pwdarg != (char *)NULL) {
/*
                        GRR:  eventually support multiple passwords?
                        Info(slide, 0x401, ((char *)slide,
                          LoadFarString(OnlyOnePasswd)));
                        return(PK_PARAM);
 */
                    } else {
                        /* first check for "-Ppasswd", then for "-P passwd" */
                        uO.pwdarg = s;
                        if (*uO.pwdarg == '\0') {
                            if (argc > 1) {
                                --argc;
                                uO.pwdarg = *++argv;
                                if (*uO.pwdarg == '-') {
                                    Info(slide, 0x401, ((char *)slide,
                                      LoadFarString(MustGivePasswd)));
                                    return(PK_PARAM);
                                }
                                /* else pwdarg points at decryption password */
                            } else {
                                Info(slide, 0x401, ((char *)slide,
                                  LoadFarString(MustGivePasswd)));
                                return(PK_PARAM);
                            }
                        }
                        /* pwdarg now points at decryption password (-Ppasswd or
                         *  -P passwd); point s at end of passwd to avoid mis-
                         *  interpretation of passwd characters as more options
                         */
                        if (*s != 0)
                            while (*++s != 0)
                                ;
                    }
                    break;
#endif /* CRYPT */
                case ('q'):    /* quiet:  fewer comments/messages */
                    if (negative) {
                        uO.qflag = MAX(uO.qflag-negative,0);
                        negative = 0;
                    } else
                        ++uO.qflag;
                    break;
#ifdef QDOS
                case ('Q'):   /* QDOS flags */
                    qlflag ^= strtol(s, &s, 10);
                    break;    /* we XOR this as we can config qlflags */
#endif
#ifdef DOS_FLX_NLM_OS2_W32
                case ('s'):    /* spaces in filenames:  allow by default */
                    if (negative)
                        uO.sflag = FALSE, negative = 0;
                    else
                        uO.sflag = TRUE;
                    break;
#endif /* DOS_FLX_NLM_OS2_W32 */
                case ('t'):
                    if (negative)
                        uO.tflag = FALSE, negative = 0;
                    else
                        uO.tflag = TRUE;
                    break;
#ifdef TIMESTAMP
                case ('T'):
                    if (negative)
                        uO.T_flag = FALSE, negative = 0;
                    else
                        uO.T_flag = TRUE;
                    break;
#endif
                case ('u'):    /* update (extract only new and newer files) */
                    if (negative)
                        uO.uflag = FALSE, negative = 0;
                    else
                        uO.uflag = TRUE;
                    break;
#ifndef CMS_MVS
                case ('U'):    /* obsolete; to be removed in version 6.0 */
                    if (negative)
                        uO.L_flag = TRUE, negative = 0;
                    else
                        uO.L_flag = FALSE;
                    break;
#endif /* !CMS_MVS */
#ifndef SFX
                case ('v'):    /* verbose */
                    if (negative) {
                        uO.vflag = MAX(uO.vflag-negative,0);
                        negative = 0;
                    } else if (uO.vflag)
                        ++uO.vflag;
                    else
                        uO.vflag = 2;
                    break;
#endif /* !SFX */
#ifndef CMS_MVS
                case ('V'):    /* Version (retain VMS/DEC-20 file versions) */
                    if (negative)
                        uO.V_flag = FALSE, negative = 0;
                    else
                        uO.V_flag = TRUE;
                    break;
#endif /* !CMS_MVS */
                case ('x'):    /* extract:  default */
#ifdef SFX
                    /* when 'x' is the only option in this argument, and the
                     * next arg is not an option, assume this initiates an
                     * exclusion list (-x xlist):  terminate option-scanning
                     * and leave uz_opts with argv still pointing to "-x";
                     * the xlist is processed later
                     */
                    if (s - argv[0] == 2 && *s == '\0' &&
                        argc > 1 && argv[1][0] != '-') {
                        /* break out of nested loops without "++argv;--argc" */
                        goto opts_done;
                    }
#endif /* SFX */
                    break;
#if (defined(RESTORE_UIDGID) || defined(RESTORE_ACL))
                case ('X'):   /* restore owner/protection info (need privs?) */
                    if (negative) {
                        uO.X_flag = MAX(uO.X_flag-negative,0);
                        negative = 0;
                    } else
                        ++uO.X_flag;
                    break;
#endif /* RESTORE_UIDGID || RESTORE_ACL */
                case ('z'):    /* display only the archive comment */
                    if (negative) {
                        uO.zflag = MAX(uO.zflag-negative,0);
                        negative = 0;
                    } else
                        ++uO.zflag;
                    break;
#ifndef SFX
                case ('Z'):    /* should have been first option (ZipInfo) */
                    Info(slide, 0x401, ((char *)slide, LoadFarString(Zfirst)));
                    error = TRUE;
                    break;
#endif /* !SFX */
#ifdef DOS_H68_OS2_W32
                case ('$'):
                    if (negative) {
                        uO.volflag = MAX(uO.volflag-negative,0);
                        negative = 0;
                    } else
                        ++uO.volflag;
                    break;
#endif /* DOS_H68_OS2_W32 */
#if (!defined(RISCOS) && !defined(CMS_MVS) && !defined(TANDEM))
                case (':'):
                    if (negative) {
                        uO.ddotflag = MAX(uO.ddotflag-negative,0);
                        negative = 0;
                    } else
                        ++uO.ddotflag;
                    break;
#endif /* !RISCOS && !CMS_MVS && !TANDEM */
                default:
                    error = TRUE;
                    break;

            } /* end switch */
        } /* end while (not end of argument string) */
    } /* end while (not done with switches) */

/*---------------------------------------------------------------------------
    Check for nonsensical combinations of options.
  ---------------------------------------------------------------------------*/

#ifdef SFX
opts_done:  /* yes, very ugly...but only used by UnZipSFX with -x xlist */
#endif

    if ((uO.cflag && uO.tflag) || (uO.cflag && uO.uflag) ||
        (uO.tflag && uO.uflag) || (uO.fflag && uO.overwrite_none))
    {
        Info(slide, 0x401, ((char *)slide, LoadFarString(InvalidOptionsMsg)));
        error = TRUE;
    }
    if (uO.aflag > 2)
        uO.aflag = 2;
#ifdef VMS
    if (uO.bflag > 2)
        uO.bflag = 2;
#endif
    if (uO.overwrite_all && uO.overwrite_none) {
        Info(slide, 0x401, ((char *)slide, LoadFarString(IgnoreOOptionMsg)));
        uO.overwrite_all = FALSE;
    }
#ifdef MORE
    if (G.M_flag && !isatty(1))  /* stdout redirected: "more" func. useless */
        G.M_flag = 0;
#endif

#ifdef SFX
    if (error)
#else
    if ((argc-- == 0) || error)
#endif
    {
        *pargc = argc;
        *pargv = argv;
#ifndef SFX
        if (uO.vflag >= 2 && argc == -1) {              /* "unzip -v" */
            show_version_info(__G);
            return PK_OK;
        }
        if (!G.noargs && !error)
            error = PK_PARAM;   /* had options (not -h or -v) but no zipfile */
#endif /* !SFX */
        return USAGE(error);
    }

#ifdef SFX
    /* print our banner unless we're being fairly quiet */
    if (uO.qflag < 2)
        Info(slide, error? 1 : 0, ((char *)slide, LoadFarString(UnzipSFXBanner),
          UZ_MAJORVER, UZ_MINORVER, UZ_PATCHLEVEL, UZ_BETALEVEL,
          LoadFarStringSmall(VersionDate)));
#ifdef BETA
    /* always print the beta warning:  no unauthorized distribution!! */
    Info(slide, error? 1 : 0, ((char *)slide, LoadFarString(BetaVersion), "\n",
      "SFX"));
#endif
#endif /* SFX */

    if (uO.cflag || uO.tflag || uO.vflag || uO.zflag
#ifdef TIMESTAMP
                                                     || uO.T_flag
#endif
                                                                 )
        G.extract_flag = FALSE;
    else
        G.extract_flag = TRUE;

    *pargc = argc;
    *pargv = argv;
    return PK_OK;

} /* end function uz_opts() */




/********************/
/* Function usage() */
/********************/

#ifdef SFX
#  ifdef VMS
#    define LOCAL "X.  Quote uppercase options"
#  endif
#  ifdef UNIX
#    define LOCAL "X"
#  endif
#  ifdef DOS_OS2_W32
#    define LOCAL "s$"
#  endif
#  if (defined(FLEXOS) || defined(NLM))
#    define LOCAL "s"
#  endif
#  ifdef AMIGA
#    define LOCAL "N"
#  endif
   /* Default for all other systems: */
#  ifndef LOCAL
#    define LOCAL ""
#  endif

#  ifdef MORE
#    define SFXOPT1 "M"
#  else
#    define SFXOPT1 ""
#  endif

int usage(__G__ error)   /* return PK-type error code */
    __GDEF
    int error;
{
    Info(slide, error? 1 : 0, ((char *)slide, LoadFarString(UnzipSFXBanner),
      UZ_MAJORVER, UZ_MINORVER, UZ_PATCHLEVEL, UZ_BETALEVEL,
      LoadFarStringSmall(VersionDate)));
    Info(slide, error? 1 : 0, ((char *)slide, LoadFarString(UnzipSFXOpts),
      SFXOPT1, LOCAL));
#ifdef BETA
    Info(slide, error? 1 : 0, ((char *)slide, LoadFarString(BetaVersion), "\n",
      "SFX"));
#endif

    if (error)
        return PK_PARAM;
    else
        return PK_COOL;     /* just wanted usage screen: no error */

} /* end function usage() */





#else /* !SFX */
#  ifdef VMS
#    define QUOT '\"'
#    define QUOTS "\""
#  else
#    define QUOT ' '
#    define QUOTS ""
#  endif

int usage(__G__ error)   /* return PK-type error code */
    __GDEF
    int error;
{
    int flag = (error? 1 : 0);


/*---------------------------------------------------------------------------
    Print either ZipInfo usage or UnZip usage, depending on incantation.
    (Strings must be no longer than 512 bytes for Turbo C, apparently.)
  ---------------------------------------------------------------------------*/

    if (uO.zipinfo_mode) {

#ifndef NO_ZIPINFO

        Info(slide, flag, ((char *)slide, LoadFarString(ZipInfoUsageLine1),
          ZI_MAJORVER, ZI_MINORVER, UZ_PATCHLEVEL, UZ_BETALEVEL,
          LoadFarStringSmall(VersionDate),
          LoadFarStringSmall2(ZipInfoExample), QUOTS,QUOTS));
        Info(slide, flag, ((char *)slide, LoadFarString(ZipInfoUsageLine2)));
        Info(slide, flag, ((char *)slide, LoadFarString(ZipInfoUsageLine3),
          QUOT,QUOT, QUOT,QUOT, LoadFarStringSmall(ZipInfoUsageLine4)));
#ifdef VMS
        Info(slide, flag, ((char *)slide, "\nRemember that non-lowercase\
 filespecs must be quoted in VMS (e.g., \"Makefile\").\n"));
#endif

#endif /* !NO_ZIPINFO */

    } else {   /* UnZip mode */

        Info(slide, flag, ((char *)slide, LoadFarString(UnzipUsageLine1),
          UZ_MAJORVER, UZ_MINORVER, UZ_PATCHLEVEL, UZ_BETALEVEL,
          LoadFarStringSmall(VersionDate)));
#ifdef BETA
        Info(slide, flag, ((char *)slide, LoadFarString(BetaVersion), "", ""));
#endif

        Info(slide, flag, ((char *)slide, LoadFarString(UnzipUsageLine2),
          ZIPINFO_MODE_OPTION, LoadFarStringSmall(ZipInfoMode)));
#ifdef VMS
        if (!error)  /* maybe no command-line tail found; show extra help */
            Info(slide, flag, ((char *)slide, LoadFarString(VMSusageLine2b)));
#endif

        Info(slide, flag, ((char *)slide, LoadFarString(UnzipUsageLine3),
          LoadFarStringSmall(local1)));

        Info(slide, flag, ((char *)slide, LoadFarString(UnzipUsageLine4),
          QUOT,QUOT, QUOT,QUOT, LoadFarStringSmall(local2), QUOT,QUOT,
          LoadFarStringSmall2(local3)));

        /* This is extra work for SMALL_MEM, but it will work since
         * LoadFarStringSmall2 uses the same buffer.  Remember, this
         * is a hack. */
        Info(slide, flag, ((char *)slide, LoadFarString(UnzipUsageLine5),
          LoadFarStringSmall(Example2), LoadFarStringSmall2(Example3),
          LoadFarStringSmall2(Example3)));

    } /* end if (uO.zipinfo_mode) */

    if (error)
        return PK_PARAM;
    else
        return PK_COOL;     /* just wanted usage screen: no error */

} /* end function usage() */

#endif /* ?SFX */




#ifndef SFX

/********************************/
/* Function show_version_info() */
/********************************/

static void show_version_info(__G)
    __GDEF
{
    if (uO.qflag > 3)                           /* "unzip -vqqqq" */
        Info(slide, 0, ((char *)slide, "%d\n",
          (UZ_MAJORVER*100 + UZ_MINORVER*10 + UZ_PATCHLEVEL)));
    else {
        char *envptr, *getenv();
        int numopts = 0;

        Info(slide, 0, ((char *)slide, LoadFarString(UnzipUsageLine1v),
          UZ_MAJORVER, UZ_MINORVER, UZ_PATCHLEVEL, UZ_BETALEVEL,
          LoadFarStringSmall(VersionDate)));
        Info(slide, 0, ((char *)slide,
          LoadFarString(UnzipUsageLine2v)));
        version(__G);
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptions)));
#ifdef ACORN_FTYPE_NFS
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(AcornFtypeNFS)));
        ++numopts;
#endif
#ifdef ASM_CRC
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(AsmCRC)));
        ++numopts;
#endif
#ifdef ASM_INFLATECODES
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(AsmInflateCodes)));
        ++numopts;
#endif
#ifdef CHECK_VERSIONS
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Check_Versions)));
        ++numopts;
#endif
#ifdef COPYRIGHT_CLEAN
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Copyright_Clean)));
        ++numopts;
#endif
#ifdef DEBUG
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(UDebug)));
        ++numopts;
#endif
#ifdef DEBUG_TIME
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(DebugTime)));
        ++numopts;
#endif
#ifdef DLL
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Dll)));
        ++numopts;
#endif
#ifdef DOSWILD
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(DosWild)));
        ++numopts;
#endif
#ifdef LZW_CLEAN
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(LZW_Clean)));
        ++numopts;
#endif
#ifndef MORE
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(No_More)));
        ++numopts;
#endif
#ifdef NO_ZIPINFO
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(No_ZipInfo)));
        ++numopts;
#endif
#ifdef NTSD_EAS
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(NTSDExtAttrib)));
        ++numopts;
#endif
#ifdef OLD_THEOS_EXTRA
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(OldTheosExtra)));
        ++numopts;
#endif
#ifdef OS2_EAS
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(OS2ExtAttrib)));
        ++numopts;
#endif
#ifdef QLZIP
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(SMSExFldOnUnix)));
        ++numopts;
#endif
#ifdef REENTRANT
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Reentrant)));
        ++numopts;
#endif
#ifdef REGARGS
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(RegArgs)));
        ++numopts;
#endif
#ifdef RETURN_CODES
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Return_Codes)));
        ++numopts;
#endif
#ifdef SET_DIR_ATTRIB
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(SetDirAttrib)));
        ++numopts;
#endif
#ifdef TIMESTAMP
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(TimeStamp)));
        ++numopts;
#endif
#ifdef UNIXBACKUP
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(UnixBackup)));
        ++numopts;
#endif
#ifdef USE_EF_UT_TIME
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_EF_UT_time)));
        ++numopts;
#endif
#ifndef COPYRIGHT_CLEAN
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_Smith_Code)));
        ++numopts;
#endif
#ifndef LZW_CLEAN
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_Unshrink)));
        ++numopts;
#endif
#ifdef USE_DEFLATE64
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_Deflate64)));
        ++numopts;
#endif
#ifdef MULT_VOLUME
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_MultiVol)));
        ++numopts;
#endif
#  if (defined(__DJGPP__) && (__DJGPP__ >= 2))
#    ifdef USE_DJGPP_ENV
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_DJGPP_Env)));
        ++numopts;
#    endif
#    ifdef USE_DJGPP_GLOB
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_DJGPP_Glob)));
        ++numopts;
#    endif
#  endif /* __DJGPP__ && (__DJGPP__ >= 2) */
#ifdef USE_VFAT
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(Use_VFAT_support)));
        ++numopts;
#endif
#ifdef USE_ZLIB
        sprintf((char *)(slide+256), LoadFarStringSmall(UseZlib),
          ZLIB_VERSION, zlib_version);
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          (char *)(slide+256)));
        ++numopts;
#endif
#ifdef VMS_TEXT_CONV
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(VmsTextConv)));
        ++numopts;
#endif
#ifdef VMSCLI
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(VmsCLI)));
        ++numopts;
#endif
#ifdef VMSWILD
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(VmsWild)));
        ++numopts;
#endif
#ifdef WILD_STOP_AT_DIR
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(WildStopAtDir)));
        ++numopts;
#endif
#if CRYPT
# ifdef PASSWD_FROM_STDIN
        Info(slide, 0, ((char *)slide, LoadFarString(CompileOptFormat),
          LoadFarStringSmall(PasswdStdin)));
# endif
        Info(slide, 0, ((char *)slide, LoadFarString(Decryption),
          CR_MAJORVER, CR_MINORVER, CR_BETA_VER,
          LoadFarStringSmall(CryptDate)));
        ++numopts;
#endif /* CRYPT */
        if (numopts == 0)
            Info(slide, 0, ((char *)slide,
              LoadFarString(CompileOptFormat),
              LoadFarStringSmall(None)));

        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptions)));
        envptr = getenv(LoadFarStringSmall(EnvUnZip));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvUnZip),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
        envptr = getenv(LoadFarStringSmall(EnvUnZip2));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvUnZip2),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
        envptr = getenv(LoadFarStringSmall(EnvZipInfo));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvZipInfo),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
        envptr = getenv(LoadFarStringSmall(EnvZipInfo2));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvZipInfo2),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
#ifndef __RSXNT__
#ifdef __EMX__
        envptr = getenv(LoadFarStringSmall(EnvEMX));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvEMX),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
        envptr = getenv(LoadFarStringSmall(EnvEMXOPT));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvEMXOPT),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
#endif /* __EMX__ */
#if (defined(__GO32__) && (!defined(__DJGPP__) || (__DJGPP__ < 2)))
        envptr = getenv(LoadFarStringSmall(EnvGO32));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvGO32),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
        envptr = getenv(LoadFarStringSmall(EnvGO32TMP));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvGO32TMP),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
#endif /* __GO32__ && !(__DJGPP__ >= 2) */
#endif /* !__RSXNT__ */
#ifdef RISCOS
        envptr = getenv(LoadFarStringSmall(EnvUnZipExts));
        Info(slide, 0, ((char *)slide, LoadFarString(EnvOptFormat),
          LoadFarStringSmall(EnvUnZipExts),
          (envptr == (char *)NULL || *envptr == 0)?
          LoadFarStringSmall2(None) : envptr));
#endif /* RISCOS */
    }
} /* end function show_version() */

#endif /* !SFX */
#endif /* !WINDLL */