unzip.txt

压缩解压,是unzip540的升级,这个外国网站摘来的源码,是evb编写.

           unzip --ql file.zip
       or
           unzip -l-q file.zip
       or
           unzip -l--q file.zip
       (Extra minuses in options don't hurt.)

TIPS
       The current maintainer, being a lazy sort, finds  it  very
       useful  to define a pair of aliases:  tt for ``unzip -tq''
       and ii for ``unzip -Z'' (or ``zipinfo'').   One  may  then
       simply  type  ``tt zipfile'' to test an archive, something
       that is worth making a habit of doing.   With  luck  unzip
       will  report  ``No  errors  detected in compressed data of
       zipfile.zip,'' after which  one  may  breathe  a  sigh  of

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UNZIP(1L)                                               UNZIP(1L)

       relief.

       The maintainer also finds it useful to set the UNZIP envi-
       ronment variable to ``-aL'' and is tempted to  add  ``-C''
       as well.  His ZIPINFO variable is set to ``-z''.

DIAGNOSTICS
       The  exit  status  (or  error level) approximates the exit
       codes defined by PKWARE and takes on the following values,
       except under VMS:

              0      normal; no errors or warnings detected.

              1      one or more warning errors were encountered,
                     but processing completed  successfully  any-
                     way.   This  includes  zipfiles where one or
                     more files was skipped  due  to  unsupported
                     compression  method  or  encryption  with an
                     unknown password.

              2      a generic error in the  zipfile  format  was
                     detected.   Processing  may  have  completed
                     successfully anyway;  some  broken  zipfiles
                     created by other archivers have simple work-
                     arounds.

              3      a severe error in  the  zipfile  format  was
                     detected.   Processing probably failed imme-
                     diately.

              4      unzip was unable to allocate memory for  one
                     or  more  buffers during program initializa-
                     tion.

              5      unzip  was  unable  to  allocate  memory  or
                     unable  to  obtain a tty to read the decryp-
                     tion password(s).

              6      unzip was unable to allocate  memory  during
                     decompression to disk.

              7      unzip  was  unable to allocate memory during
                     in-memory decompression.

              8      [currently not used]

              9      the specified zipfiles were not found.

              10     invalid options were specified on  the  com-
                     mand line.

              11     no matching files were found.

              50     the disk is (or was) full during extraction.

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UNZIP(1L)                                               UNZIP(1L)

              51     the end of the ZIP archive  was  encountered
                     prematurely.

              80     the user aborted unzip prematurely with con-
                     trol-C (or similar)

              81     testing or extraction of one or  more  files
                     failed  due to unsupported compression meth-
                     ods or unsupported decryption.

              82     no files were found due  to  bad  decryption
                     password(s).   (If even one file is success-
                     fully processed, however, the exit status is
                     1.)

       VMS  interprets  standard  Unix  (or  PC) return values as
       other, scarier-looking things, so unzip instead maps  them
       into  VMS-style  status  codes.  The current mapping is as
       follows:   1 (success) for  normal  exit,  0x7fff0001  for
       warning     errors,     and    (0x7fff000?    +    16*nor-
       mal_unzip_exit_status) for all other errors, where the `?'
       is  2  (error)  for  unzip values 2, 9-11 and 80-82, and 4
       (fatal error) for the remaining ones (3-8,  50,  51).   In
       addition,  there  is  a  compilation option to expand upon
       this behavior:  defining RETURN_CODES results in a  human-
       readable explanation of what the error status means.

BUGS
       Multi-part  archives are not yet supported, except in con-
       junction  with  zip.   (All  parts  must  be  concatenated
       together  in  order, and then ``zip -F'' must be performed
       on the concatenated archive in order to ``fix'' it.)  This
       will definitely be corrected in the next major release.

       Archives  read  from standard input are not yet supported,
       except with funzip (and then only the first member of  the
       archive can be extracted).

       Archives  encrypted  with 8-bit passwords (e.g., passwords
       with accented European characters)  may  not  be  portable
       across systems and/or other archivers.  See the discussion
       in DECRYPTION above.

       unzip's -M (``more'') option tries to  take  into  account
       automatic  wrapping  of  long lines. However, the code may
       fail to detect the correct wrapping locations. First,  TAB
       characters  (and  similar control sequences) are not taken
       into account, they are handled as ordinary printable char-
       acters.  Second, depending on the actual system / OS port,
       unzip may not detect the true screen geometry  but  rather
       rely  on  "commonly used" default dimensions.  The correct
       handling of tabs would require  the  implementation  of  a
       query  for  the  actual tabulator setup on the output con-
       sole.

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UNZIP(1L)                                               UNZIP(1L)

       Dates, times and permissions of stored directories are not
       restored except under Unix. (On Windows NT and successors,
       timestamps are now restored.)

       [MS-DOS] When extracting or testing files from an  archive
       on  a defective floppy diskette, if the ``Fail'' option is
       chosen from DOS's ``Abort, Retry, Fail?''  message,  older
       versions of unzip may hang the system, requiring a reboot.
       This problem appears to be fixed, but control-C  (or  con-
       trol-Break) can still be used to terminate unzip.

       Under  DEC Ultrix, unzip would sometimes fail on long zip-
       files (bad CRC, not always reproducible).  This was appar-
       ently  due  either  to a hardware bug (cache memory) or an
       operating system bug (improper handling of page  faults?).
       Since  Ultrix  has been abandoned in favor of Digital Unix
       (OSF/1), this may not be an issue anymore.

       [Unix] Unix special files  such  as  FIFO  buffers  (named
       pipes),  block  devices  and  character  devices  are  not
       restored even if they are somehow represented in the  zip-
       file,  nor  are hard-linked files relinked.  Basically the
       only file types  restored  by  unzip  are  regular  files,
       directories and symbolic (soft) links.

       [OS/2]  Extended  attributes  for existing directories are
       only updated if  the  -o  (``overwrite  all'')  option  is
       given.   This  is  a  limitation  of the operating system;
       because directories only have a creation  time  associated
       with  them,  unzip  has  no  way  to determine whether the
       stored attributes are newer or older than those  on  disk.
       In practice this may mean a two-pass approach is required:
       first unpack the archive normally (with or without  fresh-
       ening/updating  existing  files),  then overwrite just the
       directory entries (e.g., ``unzip -o foo */'').

       [VMS] When  extracting  to  another  directory,  only  the
       [.foo]  syntax  is  accepted for the -d option; the simple
       Unix foo syntax is silently ignored (as is the less common
       VMS foo.dir syntax).

       [VMS]  When  the  file  being  extracted  already  exists,
       unzip's query only allows skipping, overwriting or  renam-
       ing;  there should additionally be a choice for creating a
       new version of  the  file.   In  fact,  the  ``overwrite''
       choice  does  create a new version; the old version is not
       overwritten or deleted.

SEE ALSO
       funzip(1L),  zip(1L),  zipcloak(1L),   zipgrep(1L),   zip-
       info(1L), zipnote(1L), zipsplit(1L)

URL
       The Info-ZIP home page is currently at

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UNZIP(1L)                                               UNZIP(1L)

           http://www.info-zip.org/pub/infozip/
       or
           ftp://ftp.info-zip.org/pub/infozip/ .

AUTHORS
       The  primary Info-ZIP authors (current semi-active members
       of the Zip-Bugs workgroup) are:  Ed Gordon  (Zip,  general
       maintenance,  shared  code, Zip64, Win32, Unix); Christian
       Spieler  (UnZip  maintenance  coordination,  VMS,  MS-DOS,
       Win32,  shared code, general Zip and UnZip integration and
       optimization); Onno  van  der  Linden  (Zip);  Mike  White
       (Win32,  Windows GUI, Windows DLLs); Kai Uwe Rommel (OS/2,
       Win32); Steven M. Schweda (VMS, support of new  features);
       Paul  Kienitz  (Amiga,  Win32); Chris Herborth (BeOS, QNX,
       Atari); Jonathan Hudson (SMS/QDOS); Sergio  Monesi  (Acorn
       RISC  OS); Harald Denker (Atari, MVS); John Bush (Solaris,
       Amiga); Hunter Goatley (VMS, Info-ZIP  Site  maintenance);
       Steve  Salisbury  (Win32);  Steve Miller (Windows CE GUI),
       Johnny Lee (MS-DOS, Win32, Zip64); and Dave Smith  (Tandem
       NSK).

       The  following  people were former members of the Info-ZIP
       development group and provided major contributions to  key
       parts  of  the  current  code:  Greg ``Cave Newt'' Roelofs
       (UnZip, unshrink decompression); Jean-loup Gailly (deflate
       compression);  Mark Adler (inflate decompression, fUnZip).

       The author of the original unzip  code  upon  which  Info-
       ZIP's  was  based is Samuel H. Smith; Carl Mascott did the
       first Unix port; and David P.   Kirschbaum  organized  and
       led Info-ZIP in its early days with Keith Petersen hosting
       the original mailing list at WSMR-SimTel20.  The full list
       of  contributors  to  UnZip  has grown quite large; please
       refer to the CONTRIBS file in the UnZip  source  distribu-
       tion for a relatively complete version.

VERSIONS
       v1.2   15 Mar 89   Samuel H. Smith
       v2.0    9 Sep 89   Samuel H. Smith
       v2.x   fall 1989   many Usenet contributors
       v3.0    1 May 90   Info-ZIP (DPK, consolidator)
       v3.1   15 Aug 90   Info-ZIP (DPK, consolidator)
       v4.0    1 Dec 90   Info-ZIP (GRR, maintainer)
       v4.1   12 May 91   Info-ZIP
       v4.2   20 Mar 92   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.0   21 Aug 92   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.01  15 Jan 93   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.1    7 Feb 94   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.11   2 Aug 94   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.12  28 Aug 94   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.2   30 Apr 96   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.3   22 Apr 97   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.31  31 May 97   Info-ZIP (Zip-Bugs subgroup, GRR)
       v5.32   3 Nov 97   Info-ZIP (Zip-Bugs subgroup, GRR)

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UNZIP(1L)                                               UNZIP(1L)

       v5.4   28 Nov 98   Info-ZIP (Zip-Bugs subgroup, SPC)
       v5.41  16 Apr 00   Info-ZIP (Zip-Bugs subgroup, SPC)
       v5.42  14 Jan 01   Info-ZIP (Zip-Bugs subgroup, SPC)
       v5.5   17 Feb 02   Info-ZIP (Zip-Bugs subgroup, SPC)
       v5.51  22 May 04   Info-ZIP (Zip-Bugs subgroup, SPC)
       v5.52  28 Feb 05   Info-ZIP (Zip-Bugs subgroup, SPC)

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