unzip.doc

另一个解zip文件的程序

     -V   retain (VMS) file version numbers.  VMS  files  can  be
          stored   with   a   version   number,   in  the  format
          file.ext;##.  By default the  ``;##''  version  numbers
          are  stripped,  but  this  option  allows  them  to  be
          retained.  (On filesystems  which  limit  filenames  to
          particularly  short lengths, the version numbers may be
          truncated or stripped regardless of this option.)

     -X   [VMS] restore owner/protection info (may require system
          privileges).    Ordinary  file  attributes  are  always
          restored, but this option allows UICs to be restored as
          well.   [The  next  version  of unzip will support Unix
          UID/GID info as well, and possibly NT permissions.]

     -$   [MS-DOS, OS/2, NT, Amiga] restore the volume  label  if
          the  extraction medium is removable (e.g., a diskette).
          Doubling the option  (-$$)  allows  fixed  media  (hard
          disks)  to  be  labelled  as  well.  By default, volume
          labels are ignored.

ENVIRONMENT OPTIONS
     unzip's default behavior may be modified via options  placed
     in  an  environment  variable.   This  can  be done with any
     option, but it is probably most useful with the -q, -a,  -o,
     or  -n  modifiers:   make  unzip quieter by default, make it
     auto-convert text files, or  make  it  always  overwrite  or
     never  overwrite files as it extracts them.  For example, to
     make unzip  act  as  quietly  as  possible,  only  reporting
     errors, one would use one of the following commands:

        UNZIP=-qq; export UNZIP   Unix Bourne shell
        setenv UNZIP -qq          Unix C shell
        set UNZIP=-qq             OS/2 or MS-DOS
        define UNZIP_OPTS "-qq"   VMS (quotes for lowercase)

     Environment options are, in effect, considered  to  be  just
     like  any  other  command-line options, except that they are
     effectively the first options on the command line.  To over-
     ride  an  environment option, one may use the ``minus opera-
     tor'' to remove it.  For instance, to override  one  of  the
     quiet-flags in the example above, use the command

        unzip --q[other options] zipfile

     The first hyphen is the normal  switch  character,  and  the
     second  is  a  minus sign, acting on the q option.  Thus the
     effect here is to cancel one quantum of quietness.  To  can-
     cel both quiet flags, two (or more) minuses may be used:

        unzip -t--q zipfile
        unzip ---qt zipfile

     (the two are equivalent).  This may seem awkward or  confus-
     ing,  but it is reasonably intuitive:  just ignore the first
     hyphen and go from there.  It is also  consistent  with  the
     behavior of Unix nice(1).

EXAMPLES
     To  use  unzip  to  extract  all  members  of  the   archive
     letters.zip  into  the  current directory and subdirectories
     below it, creating any subdirectories as necessary:

        unzip letters

     To extract all  members  of  letters.zip  into  the  current
     directory only:

        unzip -j letters

     To test letters.zip, printing only a summary  message  indi-
     cating whether the archive is OK or not:

        unzip -tq letters

     To extract to standard output  all  members  of  letters.zip
     whose  names  end in .tex, auto-converting to the local end-
     of-line convention and piping the output into more(1):

        unzip -ca letters \*.tex | more

     (The backslash before the asterisk is only required  if  the
     shell  expands  wildcards,  as  in Unix; double quotes could
     have been used instead, as in the source example below.)  To
     extract  the  binary  file paper1.dvi to standard output and
     pipe it to a printing program:

        unzip -p articles paper1.dvi | dvips

     To extract all FORTRAN and C source  files--*.f,  *.c,  *.h,
     and Makefile--into the /tmp directory:

        unzip source.zip "*.[fch]" Makefile -d /tmp

     (the double quotes are necessary only in Unix  and  only  if
     globbing  is  turned on).  To extract only newer versions of
     the files already in the current directory, without querying
     (NOTE:   be  careful  of unzipping in one timezone a zipfile
     created in another--ZIP archives to date contain no timezone
     information,  and  a ``newer'' file from an eastern timezone
     may, in fact, be older):

        unzip -fo sources

     To extract newer  versions  of  the  files  already  in  the
     current  directory and to create any files not already there
     (same caveat as previous example):

        unzip -uo sources

     In the last five examples, assume that UNZIP  or  UNZIP_OPTS
     is set to -q.  To do a singly quiet listing:

        unzip -l file

     To do a doubly quiet listing:

        unzip -ql file

     To do a standard listing:

        unzip --ql file
     or
        unzip -l-q file
     or
        unzip -l--q file          (extra minuses 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 sim-
     ply  type ``tt zipfile'' to test an archive, something which
     is worth making a habit of  doing.   With  luck  unzip  will
     report  ``No  errors  detected in zipfile.zip,'' after which
     one may breathe a sigh of relief.

BUGS
     [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, unzip may
     hang   the  system,  requiring  a  reboot.   Instead,  press
     control-C (or control-Break) to terminate unzip.

     Under DEC Ultrix, unzip will sometimes fail on long zipfiles
     (bad  CRC, not always reproducible).  This is apparently due
     either to a hardware bug (cache memory) or an operating sys-
     tem bug (improper handling of page faults?).

     Dates and times of stored directories are not restored.

     [OS/2] Extended  attributes  for  existing  directories  are
     never  updated.   This is a limitation of the operating sys-
     tem; unzip has no way to determine whether the stored attri-
     butes are newer or older than the existing ones.

     [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 renaming; 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), zipinfo(1L),
     zipnote(1L), zipsplit(1L)

AUTHORS
     The primary Info-ZIP authors  (current  zip-bugs  workgroup)
     are:   Jean-loup Gailly (Zip), Greg R. Roelofs (UnZip), Mark
     Adler (decompression, fUnZip), Kai Uwe Rommel  (OS/2),  Igor
     Mandrichenko  (VMS),  John  Bush  and  Paul Kienitz (Amiga),
     Antoine Verheijen (Macintosh), Chris Herborth (Atari), Henry
     Gessau  (NT), and Robert Heath (Windows).  The author of the
     original unzip code  upon  which  Info-ZIP's  is  based  was
     Samuel  H.  Smith; Carl Mascott did the first Unix port; and
     David P. Kirschbaum organized and led Info-ZIP in its  early
     days.   The  full  list  of  contributors to UnZip has grown
     quite large; please refer to the CONTRIBS file in the  UnZip
     source distribution for a more complete list.

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, maint.)
     v5.0  21 Aug 92  Info-ZIP (zip-bugs subgroup; GRR, maint.)
     v5.1   7 Feb 94  Info-ZIP (zip-bugs subgroup; GRR, maint.)

Info-ZIP             Last change:  7 Feb 94                  v5.1