unzip.txt

zip压缩

       -b     [Tandem]  force  the  creation  files with filecode
              type 180 ('C') when extracting Zip  entries  marked
              as  "text".  (On  Tandem, -a is enabled by default,
              see above).

       -b     [VMS] auto-convert binary files (see -a  above)  to
              fixed-length, 512-byte record format.  Doubling the
              option (-bb) forces all files to  be  extracted  in
              this format. When extracting to standard output (-c
              or -p option in effect), the default conversion  of
              text  record delimiters is disabled for binary (-b)
              resp. all (-bb) files.

       -B     [Unix only, and only if  compiled  with  UNIXBACKUP
              defined]  save  a  backup  copy of each overwritten
              file with a tilde appended (e.g., the old  copy  of
              ``foo''  is  renamed to ``foo~'').  This is similar
              to the default behavior of emacs(1) in  many  loca-
              tions.

       -C     match  filenames  case-insensitively.  unzip's phi-
              losophy is ``you get what you ask  for''  (this  is
              also responsible for the -L/-U change; see the rel-
              evant options below).  Because  some  file  systems
              are  fully  case-sensitive (notably those under the
              Unix  operating  system)  and  because   both   ZIP
              archives and unzip itself are portable across plat-
              forms, unzip's default behavior is  to  match  both
              wildcard  and  literal  filenames case-sensitively.
              That is, specifying  ``makefile''  on  the  command
              line  will  only match ``makefile'' in the archive,
              not ``Makefile'' or ``MAKEFILE'' (and similarly for
              wildcard specifications).  Since this does not cor-
              respond to  the  behavior  of  many  other  operat-
              ing/file  systems  (for  example,  OS/2 HPFS, which
              preserves mixed case but is not sensitive  to  it),
              the  -C  option  may  be used to force all filename
              matches to be  case-insensitive.   In  the  example
              above,  all  three  files  would then match ``make-
              file'' (or ``make*'', or similar).  The  -C  option
              affects  files in both the normal file list and the
              excluded-file list (xlist).

       -E     [MacOS only] display contents of MacOS extra  field

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              during restore operation.

       -F     [Acorn  only]  suppress  removal  of  NFS  filetype
              extension from stored filenames.

       -F     [non-Acorn systems supporting long  filenames  with
              embedded   commas,   and   only  if  compiled  with
              ACORN_FTYPE_NFS defined] translate filetype  infor-
              mation from ACORN RISC OS extra field blocks into a
              NFS filetype extension and append it to  the  names
              of  the extracted files.  (When the stored filename
              appears to already have an  appended  NFS  filetype
              extension,  it  is  replaced  by  the info from the
              extra field.)

       -i     [MacOS only] ignore filenames stored in MacOS extra
              fields.   Instead,  the  most  compatible  filename
              stored in the generic part of the entry's header is
              used.

       -j     junk  paths.   The archive's directory structure is
              not recreated;  all  files  are  deposited  in  the
              extraction directory (by default, the current one).

       -J     [BeOS only] junk file attributes.  The file's  BeOS
              file  attributes  are not restored, just the file's
              data.

       -J     [MacOS only] ignore MacOS extra fields.  All Macin-
              tosh   specific  info  is  skipped.  Data-fork  and
              resource-fork are restored as separate files.

       -L     convert to lowercase any filename originating on an
              uppercase-only  operating  system  or  file system.
              (This was  unzip's  default  behavior  in  releases
              prior  to 5.11; the new default behavior is identi-
              cal to the old behavior with the -U  option,  which
              is  now  obsolete  and  will be removed in a future
              release.)   Depending  on   the   archiver,   files
              archived  under  single-case file systems (VMS, old
              MS-DOS FAT, etc.) may be  stored  as  all-uppercase
              names;  this  can  be  ugly  or  inconvenient  when
              extracting to a case-preserving file system such as
              OS/2  HPFS  or  a  case-sensitive one such as under
              Unix.  By default unzip  lists  and  extracts  such
              filenames  exactly  as  they're  stored  (excepting
              truncation, conversion of  unsupported  characters,
              etc.);  this  option  causes the names of all files
              from certain systems to be converted to  lowercase.
              The  -LL option forces conversion of every filename
              to lowercase, regardless of  the  originating  file
              system.

       -M     pipe  all  output through an internal pager similar

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              to the Unix more(1)  command.   At  the  end  of  a
              screenful   of   output,   unzip   pauses   with  a
              ``--More--'' prompt;  the  next  screenful  may  be
              viewed  by  pressing  the Enter (Return) key or the
              space bar.  unzip can be terminated by pressing the
              ``q''  key  and,  on some systems, the Enter/Return
              key.  Unlike Unix more(1),  there  is  no  forward-
              searching   or  editing  capability.   Also,  unzip
              doesn't notice if long lines wrap at  the  edge  of
              the  screen,  effectively resulting in the printing
              of two or more lines and the likelihood  that  some
              text  will  scroll off the top of the screen before
              being viewed.  On some systems the number of avail-
              able  lines on the screen is not detected, in which
              case unzip assumes the height is 24 lines.

       -n     never overwrite existing files.  If a file  already
              exists,  skip  the  extraction of that file without
              prompting.   By  default   unzip   queries   before
              extracting  any  file that already exists; the user
              may choose to  overwrite  only  the  current  file,
              overwrite all files, skip extraction of the current
              file, skip extraction of  all  existing  files,  or
              rename the current file.

       -N     [Amiga]  extract  file comments as Amiga filenotes.
              File comments are created with  the  -c  option  of
              zip(1L), or with the -N option of the Amiga port of
              zip(1L), which stores filenotes as comments.

       -o     overwrite existing files without  prompting.   This
              is a dangerous option, so use it with care.  (It is
              often used with -f, however, and is the only way to
              overwrite directory EAs under OS/2.)

       -P password
              use  password  to decrypt encrypted zipfile entries
              (if any).  THIS IS INSECURE!  Many multi-user oper-
              ating  systems provide ways for any user to see the
              current command line of any  other  user;  even  on
              stand-alone  systems  there is always the threat of
              over-the-shoulder peeking.  Storing  the  plaintext
              password  as part of a command line in an automated
              script is even worse.  Whenever possible,  use  the
              non-echoing, interactive prompt to enter passwords.
              (And where security is truly important, use  strong
              encryption  such  as Pretty Good Privacy instead of
              the relatively weak encryption provided by standard
              zipfile utilities.)

       -q     perform  operations  quietly  (-qq = even quieter).
              Ordinarily unzip prints the names of the files it's
              extracting  or testing, the extraction methods, any
              file or zipfile comments that may be stored in  the

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              archive,  and possibly a summary when finished with
              each  archive.   The  -q[q]  options  suppress  the
              printing of some or all of these messages.

       -s     [OS/2,  NT,  MS-DOS] convert spaces in filenames to
              underscores.  Since all PC operating systems  allow
              spaces  in  filenames,  unzip  by  default extracts
              filenames     with     spaces     intact     (e.g.,
              ``EA DATA. SF'').   This  can  be awkward, however,
              since MS-DOS in particular does not gracefully sup-
              port  spaces in filenames.  Conversion of spaces to
              underscores can eliminate the awkwardness  in  some
              cases.

       -U     (obsolete; to be removed in a future release) leave
              filenames uppercase if created under  MS-DOS,  VMS,
              etc.  See -L above.

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

       -X     [VMS, Unix, OS/2, NT] restore owner/protection info
              (UICs)  under VMS, or user and group info (UID/GID)
              under Unix, or access control  lists  (ACLs)  under
              certain  network-enabled  versions  of  OS/2  (Warp
              Server with IBM LAN Server/Requester  3.0  to  5.0;
              Warp  Connect  with IBM Peer 1.0), or security ACLs
              under Windows NT.  In most cases this will  require
              special  system privileges, and doubling the option
              (-XX) under NT instructs unzip  to  use  privileges
              for extraction; but under Unix, for example, a user
              who belongs to several  groups  can  restore  files
              owned  by  any of those groups, as long as the user
              IDs match his or her own.  Note that ordinary  file
              attributes are always restored--this option applies
              only to optional, extra ownership info available on
              some operating systems.  [NT's access control lists
              do not appear  to  be  especially  compatible  with
              OS/2's,  so  no  attempt  is made at cross-platform
              portability of access privileges.  It is not  clear
              under  what  conditions  this  would ever be useful
              anyway.]

       -$     [MS-DOS, OS/2, NT] 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.

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       -/ extensions
              [Acorn only] overrides the extension list  supplied
              by  Unzip$Ext  environment variable. During extrac-
              tion, filename extensions that  match  one  of  the
              items  in  this extension list are swapped in front
              of the base name of the extracted file.

       -:     [all but Acorn,  VM/CMS,  MVS,  Tandem]  allows  to
              extract  archive  members into locations outside of
              the current `` extraction root folder''. For  secu-
              rity reasons, unzip normally removes ``parent dir''
              path  components  (``../'')  from  the   names   of
              extracted  file.  This safety feature (new for ver-
              sion 5.50) prevents unzip from accidentally writing
              files  to  ``sensitive''  areas  outside the active
              extraction folder tree head.  The  -:  option  lets
              unzip  switch  back  to  its previous, more liberal
              behaviour, to allow  exact  extraction  of  (older)
              archives  that  used  ``../''  components to create
              multiple directory trees at the level of  the  cur-
              rent extraction folder.