zipinfo.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.

ZIPINFO(1L)                                           ZIPINFO(1L)

NAME
       zipinfo - list detailed information about a ZIP archive

SYNOPSIS
       zipinfo     [-12smlvhMtTz]     file[.zip]    [file(s) ...]
       [-x xfile(s) ...]

       unzip   -Z   [-12smlvhMtTz]    file[.zip]    [file(s) ...]
       [-x xfile(s) ...]

DESCRIPTION
       zipinfo  lists  technical information about files in a ZIP
       archive, most commonly  found  on  MS-DOS  systems.   Such
       information  includes  file access permissions, encryption
       status, type of compression, version and operating  system
       or  file system of compressing program, and the like.  The
       default behavior (with no options) is to list  single-line
       entries  for  each  file  in  the archive, with header and
       trailer lines providing summary information for the entire
       archive.  The format is a cross between Unix ``ls -l'' and
       ``unzip -v''  output.   See  DETAILED  DESCRIPTION  below.
       Note  that  zipinfo  is  the  same program as unzip (under
       Unix, a link to it); on  some  systems,  however,  zipinfo
       support may have been omitted when unzip was compiled.

ARGUMENTS
       file[.zip]
              Path of the ZIP archive(s).  If the file specifica-
              tion is a wildcard, each matching file is processed
              in  an order determined by the operating system (or
              file system).  Only the filename can be a wildcard;
              the  path  itself cannot.  Wildcard expressions are
              similar to Unix egrep(1) (regular) expressions  and
              may contain:

              *      matches a sequence of 0 or more characters

              ?      matches exactly 1 character

              [...]  matches  any  single  character found inside
                     the brackets;  ranges  are  specified  by  a
                     beginning character, a hyphen, and an ending
                     character.  If an  exclamation  point  or  a
                     caret (`!' or `^') follows the left bracket,
                     then the  range  of  characters  within  the
                     brackets  is complemented (that is, anything
                     except the characters inside the brackets is
                     considered  a match).  To specify a verbatim
                     left bracket, the  three-character  sequence
                     ``[[]'' has to be used.

              (Be  sure  to quote any character that might other-
              wise be interpreted or modified  by  the  operating
              system,  particularly  under  Unix and VMS.)  If no

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ZIPINFO(1L)                                           ZIPINFO(1L)

              matches are found, the specification is assumed  to
              be  a literal filename; and if that also fails, the
              suffix .zip is appended.  Note that self-extracting
              ZIP  files  are  supported,  as  with any other ZIP
              archive; just specify  the  .exe  suffix  (if  any)
              explicitly.

       [file(s)]
              An  optional  list  of  archive  members to be pro-
              cessed, separated by spaces.   (VMS  versions  com-
              piled  with  VMSCLI defined must delimit files with
              commas instead.)  Regular  expressions  (wildcards)
              may  be  used to match multiple members; see above.
              Again, be sure to quote expressions that would oth-
              erwise  be  expanded  or  modified by the operating
              system.

       [-x xfile(s)]
              An optional list of archive members to be  excluded
              from processing.

OPTIONS
       -1     list  filenames  only,  one  per line.  This option
              excludes all others; headers, trailers and  zipfile
              comments are never printed.  It is intended for use
              in Unix shell scripts.

       -2     list filenames only, one per line, but allow  head-
              ers  (-h), trailers (-t) and zipfile comments (-z),
              as well.  This option may be useful in cases  where
              the stored filenames are particularly long.

       -s     list  zipfile  info in short Unix ``ls -l'' format.
              This is the default behavior; see below.

       -m     list zipfile info in medium Unix ``ls -l''  format.
              Identical  to  the  -s output, except that the com-
              pression factor, expressed as a percentage, is also
              listed.

       -l     list  zipfile  info  in long Unix ``ls -l'' format.
              As with -m except  that  the  compressed  size  (in
              bytes) is printed instead of the compression ratio.

       -v     list zipfile  information  in  verbose,  multi-page
              format.

       -h     list  header  line.   The archive name, actual size
              (in bytes) and total number of files is printed.

       -M     pipe all output through an internal  pager  similar
              to  the  Unix  more(1)  command.   At  the end of a
              screenful  of  output,  zipinfo   pauses   with   a
              ``--More--''  prompt;  the  next  screenful  may be

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ZIPINFO(1L)                                           ZIPINFO(1L)

              viewed by pressing the Enter (Return)  key  or  the
              space  bar.   zipinfo 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,
              zipinfo  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 available lines  on  the  screen  is  not
              detected,  in which case zipinfo assumes the height
              is 24 lines.

       -t     list totals for files listed or for all files.  The
              number of files listed, their uncompressed and com-
              pressed total sizes , and their overall compression
              factor  is  printed; or, if only the totals line is
              being printed, the values for  the  entire  archive
              are  given.   The  compressed  total  size does not
              include the 12  additional  header  bytes  of  each
              encrypted  entry.  Note  that  the total compressed
              (data) size will never  match  the  actual  zipfile
              size, since the latter includes all of the internal
              zipfile headers in addition to the compressed data.

       -T     print  the file dates and times in a sortable deci-
              mal format (yymmdd.hhmmss).  The default date  for-
              mat is a more standard, human-readable version with
              abbreviated month names (see examples below).

       -z     include the archive comment (if any) in  the  list-
              ing.

DETAILED DESCRIPTION
       zipinfo  has  a  number  of modes, and its behavior can be
       rather difficult to fathom if one isn't familiar with Unix
       ls(1)  (or  even  if  one is).  The default behavior is to
       list files in the following format:

  -rw-rws---  1.9 unx    2802 t- defX 11-Aug-91 13:48 perms.2660

       The last three fields are the modification date  and  time
       of  the  file,  and its name.  The case of the filename is
       respected; thus files that  come  from  MS-DOS  PKZIP  are
       always  capitalized.  If the file was zipped with a stored
       directory name, that is also  displayed  as  part  of  the
       filename.

       The  second  and  third  fields indicate that the file was
       zipped under Unix with version 1.9 of zip.  Since it comes
       from  Unix,  the  file permissions at the beginning of the
       line are printed in Unix format.  The  uncompressed  file-
       size (2802 in this example) is the fourth field.

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ZIPINFO(1L)                                           ZIPINFO(1L)

       The  fifth  field  consists  of  two characters, either of
       which may take on several values.  The first character may
       be  either  `t'  or  `b', indicating that zip believes the
       file to be text or binary, respectively; but if  the  file
       is  encrypted, zipinfo notes this fact by capitalizing the
       character (`T' or `B').  The  second  character  may  also
       take  on  four  values,  depending  on whether there is an
       extended local header and/or an ``extra field'' associated
       with  the  file  (fully explained in PKWare's APPNOTE.TXT,
       but basically analogous to pragmas in ANSI  C--i.e.,  they
       provide a standard way to include non-standard information
       in the archive).  If neither exists, the character will be
       a  hyphen  (`-'); if there is an extended local header but
       no extra field, `l'; if the  reverse,  `x';  and  if  both
       exist, `X'.  Thus the file in this example is (probably) a
       text file, is not encrypted,  and  has  neither  an  extra
       field  nor  an  extended  local header associated with it.
       The example below, on the  other  hand,  is  an  encrypted
       binary file with an extra field:

  RWD,R,R     0.9 vms     168 Bx shrk  9-Aug-91 19:15 perms.0644

       Extra fields are used for various purposes (see discussion
       of the -v option below) including the storage of VMS  file
       attributes,  which is presumably the case here.  Note that
       the file attributes are listed in VMS format.  Some  other
       possibilities  for  the  host  operating  system (which is
       actually a misnomer--host file  system  is  more  correct)
       include  OS/2  or  NT  with  High  Performance File System
       (HPFS), MS-DOS, OS/2 or  NT  with  File  Allocation  Table
       (FAT)  file  system,  and Macintosh.  These are denoted as
       follows:

  -rw-a--     1.0 hpf    5358 Tl i4:3  4-Dec-91 11:33 longfilename.hpfs
  -r--ahs     1.1 fat    4096 b- i4:2 14-Jul-91 12:58 EA DATA. SF
  --w-------  1.0 mac   17357 bx i8:2  4-May-92 04:02 unzip.macr

       File attributes in the first two cases are indicated in  a
       Unix-like  format,  where  the  seven  subfields  indicate
       whether the file:  (1) is a  directory,  (2)  is  readable
       (always true), (3) is writable, (4) is executable (guessed
       on the basis of the extension--.exe, .com, .bat, .cmd  and
       .btm  files are assumed to be so), (5) has its archive bit
       set, (6) is hidden, and (7) is a system file.  Interpreta-
       tion  of  Macintosh  file attributes is unreliable because
       some Macintosh archivers don't store any attributes in the
       archive.

       Finally,  the sixth field indicates the compression method
       and possible sub-method used.  There are six methods known
       at  present:   storing (no compression), reducing, shrink-
       ing, imploding, tokenizing (never publicly released),  and
       deflating.  In addition, there are four levels of reducing
       (1 through 4); four types of imploding (4K or  8K  sliding

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ZIPINFO(1L)                                           ZIPINFO(1L)

       dictionary,  and 2 or 3 Shannon-Fano trees); and four lev-
       els of deflating (superfast, fast,  normal,  maximum  com-
       pression).   zipinfo  represents  these  methods and their
       sub-methods as follows:  stor;  re:1,  re:2,  etc.;  shrk;
       i4:2, i8:3, etc.; tokn; and defS, defF, defN, and defX.

       The  medium  and long listings are almost identical to the
       short format except  that  they  add  information  on  the
       file's  compression.   The  medium format lists the file's
       compression factor as a percentage indicating  the  amount
       of space that has been ``removed'':

  -rw-rws---  1.5 unx    2802 t- 81% defX 11-Aug-91 13:48 perms.2660

       In this example, the file has been compressed by more than
       a factor of five; the compressed data are only 19% of  the
       original  size.   The  long  format  gives  the compressed
       file's size in bytes, instead:

  -rw-rws---  1.5 unx    2802 t-     538 defX 11-Aug-91 13:48 perms.2660

       In contrast to the unzip  listings,  the  compressed  size
       figures in this listing format denote the complete size of
       compressed data, including the 12 extra  header  bytes  in
       case of encrypted entries.

       Adding  the  -T  option  changes the file date and time to
       decimal format:

  -rw-rws---  1.5 unx    2802 t-     538 defX 910811.134804 perms.2660