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zipinfo


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 infor-
     mation 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  specification
          is  a  wildcard,  each matching file is processed in an
          order determined by the operating system (or file  sys-
          tem).   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 `^') fol-
               lows the left bracket, then the range  of  charac-
               ters 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 otherwise be
          interpreted   or  modified  by  the  operating  system,
          particularly under Unix and VMS.)  If  no  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 sup-
          ported, as with any other ZIP archive; just specify the
          .exe suffix (if any) explicitly.

     [file(s)]
          An optional list of archive members  to  be  processed,
          separated  by  spaces.   (VMS  versions  compiled  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 otherwise be expanded or modi-
          fied 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 com-
          ments are never printed.  It is  intended  for  use  in
          Unix shell scripts.

     -2   list filenames only, one per line,  but  allow  headers
          (-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 compression
          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  viewed  by pressing the Enter
          (Return)  key  or  the  space  bar.   zipinfo  can   be
          terminated  by pressing the ``q'' key and, on some sys-
          tems, 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
          compressed 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 addi-
          tional 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  decimal
          format  (yymmdd.hhmmss).   The default date format is a
          more standard, human-readable version with  abbreviated
          month names (see examples below).

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

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.

     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 char-
     acter  (`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 stan-
     dard  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  actu-
     ally  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.  Interpretation  of
     Macintosh  file attributes is unreliable because some Macin-
     tosh 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,  shrinking,
     imploding, tokenizing (never publicly released), and deflat-
     ing.  In addition, there are  four  levels  of  reducing  (1
     through  4);  four types of imploding (4K or 8K sliding dic-
     tionary, and 2 or 3 Shannon-Fano trees); and four levels  of
     deflating  (superfast,  fast,  normal, maximum compression).
     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 ori-
     ginal 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  fig-
     ures  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

     Note that because of limitations in the MS-DOS  format  used
     to  store file times, the seconds field is always rounded to
     the nearest even second.  For Unix files this is expected to
     change in the next major releases of zip(1) and unzip.

     In addition to individual file information, a  default  zip-
     file listing also includes header and trailer lines:

Archive:  OS2.zip   5453 bytes   5 files
,,rw,       1.0 hpf     730 b- i4:3 26-Jun-92 23:40 Contents
,,rw,       1.0 hpf    3710 b- i4:3 26-Jun-92 23:33 makefile.os2
,,rw,       1.0 hpf    8753 b- i8:3 26-Jun-92 15:29 os2unzip.c
,,rw,       1.0 hpf      98 b- stor 21-Aug-91 15:34 unzip.def
,,rw,       1.0 hpf      95 b- stor 21-Aug-91 17:51 zipinfo.def
5 files, 13386 bytes uncompressed, 4951 bytes compressed:  63.0%

     The header line gives the name of  the  archive,  its  total
     size,  and  the total number of files; the trailer gives the
     number of files listed, their total uncompressed  size,  and
     their  total  compressed  size  (not  including any of zip's
     internal overhead).  If, however, one or  more  file(s)  are
     provided, the header and trailer lines are not listed.  This
     behavior is also similar to that of Unix's ``ls -l''; it may
     be  overridden  by  specifying  the -h and -t options expli-
     citly.  In such a case  the  listing  format  must  also  be
     specified  explicitly,  since  -h  or  -t  (or  both) in the
     absence of other options implies that  ONLY  the  header  or
     trailer  line (or both) is listed.  See the EXAMPLES section
     below for a semi-intelligible translation of this nonsense.

     The verbose listing is  mostly  self-explanatory.   It  also
     lists file comments and the zipfile comment, if any, and the
     type and  number  of  bytes  in  any  stored  extra  fields.
     Currently  known  types  of  extra  fields  include PKWARE's
     authentication (``AV'') info; OS/2 extended attributes;  VMS
     filesystem  info,  both PKWARE and Info-ZIP versions; Macin-
     tosh resource forks; Acorn/Archimedes SparkFS info;  and  so
     on.   (Note  that  in the case of OS/2 extended attributes--
     perhaps the most common use  of  zipfile  extra  fields--the
     size  of the stored EAs as reported by zipinfo may not match
     the number given by OS/2's dir command:  OS/2 always reports
     the  number  of  bytes  required  in  16-bit format, whereas
     zipinfo always reports the 32-bit storage.)

     Again, the compressed size figures of the individual entries
     include the 12 extra header bytes for encrypted entries.  In
     contrast, the archive total compressed size and the  average
     compression  ratio shown in the summary bottom line are cal-
     culated without the  extra  12  header  bytes  of  encrypted
     entries.

ENVIRONMENT OPTIONS
     Modifying zipinfo's default behavior via options  placed  in
     an environment variable can be a bit complicated to explain,
     due to zipinfo's attempts to handle various defaults  in  an
     intuitive,  yet  Unix-like,  manner.   (Try  not  to laugh.)
     Nevertheless, there is some  underlying  logic.   In  brief,
     there are three ``priority levels'' of options:  the default
     options; environment options, which can override or  add  to
     the  defaults; and explicit options given by the user, which
     can override or add to either of the above.

     The default listing  format,  as  noted  above,  corresponds
     roughly  to  the "zipinfo -hst" command (except when indivi-
     dual zipfile members are specified).  A user who prefers the
     long-listing  format  (-l)  can  make  use  of the zipinfo's
     environment variable to change this default:

     Unix Bourne shell:
          ZIPINFO=-l; export ZIPINFO

     Unix C shell:
          setenv ZIPINFO -l

     OS/2 or MS-DOS:
          set ZIPINFO=-l

     VMS (quotes for lowercase):
          define ZIPINFO_OPTS "-l"

     If,  in  addition,  the  user  dislikes  the  trailer  line,
     zipinfo's  concept  of  ``negative  options'' may be used to
     override the default inclusion of the line.  This is  accom-
     plished  by  preceding the undesired option with one or more
     minuses:  e.g., ``-l-t'' or ``--tl'', in this example.   The
     first  hyphen  is  the regular switch character, but the one
     before the `t' is a minus sign.  The dual use of hyphens may
     seem   a  little  awkward,  but  it's  reasonably  intuitive
     nonetheless:  simply ignore the first  hyphen  and  go  from
     there.   It is also consistent with the behavior of the Unix
     command nice(1).

     As  suggested  above,  the  default   variable   names   are
     ZIPINFO_OPTS  for  VMS  (where  the  symbol  used to install
     zipinfo as a foreign command  would  otherwise  be  confused
     with  the  environment  variable), and ZIPINFO for all other
     operating systems.  For compatibility  with  zip(1),  ZIPIN-
     FOOPT  is  also  accepted  (don't ask).  If both ZIPINFO and
     ZIPINFOOPT are defined, however, ZIPINFO  takes  precedence.
     unzip's  diagnostic  option (-v with no zipfile name) can be
     used to check the values of  all  four  possible  unzip  and
     zipinfo environment variables.

EXAMPLES
     To get a basic, short-format listing of  the  complete  con-
     tents  of  a  ZIP  archive storage.zip, with both header and
     totals lines, use only the archive name as  an  argument  to
     zipinfo:

         zipinfo storage

     To produce  a  basic,  long-format  listing  (not  verbose),
     including header and totals lines, use -l:

         zipinfo -l storage

     To list the complete contents of the archive without  header
     and  totals  lines,  either  negate the -h and -t options or
     else specify the contents explicitly:

         zipinfo --h-t storage
         zipinfo storage \*

     (where the backslash is required only  if  the  shell  would
     otherwise  expand the `*' wildcard, as in Unix when globbing
     is turned on--double quotes around the asterisk  would  have
     worked  as  well).   To turn off the totals line by default,
     use the environment variable (C shell is assumed here):

         setenv ZIPINFO --t
         zipinfo storage

     To get the full, short-format listing of the  first  example
     again,  given that the environment variable is set as in the
     previous example, it is necessary to specify the  -s  option
     explicitly,  since the -t option by itself implies that ONLY
     the footer line is to be printed:

         setenv ZIPINFO --t
         zipinfo -t storage            [only totals line]
         zipinfo -st storage           [full listing]

     The -s option, like -m and -l, includes headers and  footers
     by  default, unless otherwise specified.  Since the environ-
     ment variable specified no footers and  that  has  a  higher
     precedence  than  the default behavior of -s, an explicit -t
     option was necessary to produce the full  listing.   Nothing
     was  indicated  about  the header, however, so the -s option
     was sufficient.  Note that both the -h and -t options,  when
     used  by themselves or with each other, override any default
     listing of member files; only the header and/or  footer  are
     printed.   This behavior is useful when zipinfo is used with
     a wildcard zipfile specification; the contents of  all  zip-
     files are then summarized with a single command.

     To list information on a single file within the archive,  in
     medium format, specify the filename explicitly:

         zipinfo -m storage unshrink.c

     The specification of any member file, as  in  this  example,
     will  override the default header and totals lines; only the
     single line of information about the requested file will  be
     printed.   This  is  intuitively  what one would expect when
     requesting information about a single  file.   For  multiple
     files,  it  is often useful to know the total compressed and
     uncompressed size; in such cases -t may be specified  expli-
     citly:

         zipinfo -mt storage "*.[ch]" Mak\*

     To get maximal information about the ZIP  archive,  use  the
     verbose  option.  It is usually wise to pipe the output into
     a filter such as Unix more(1) if the operating system allows
     it:

         zipinfo -v storage | more


     Finally, to see the most  recently  modified  files  in  the
     archive,  use  the -T option in conjunction with an external
     sorting utility such as Unix sort(1) (and sed(1) as well, in
     this example):

         zipinfo -T storage | sort -nr -k 7 | sed 15q

     The -nr option to sort(1) tells it to  sort  numerically  in
     reverse  order  rather  than  in textual order, and the -k 7
     option tells it to sort on the seventh field.  This  assumes
     the  default  short-listing format; if -m or -l is used, the
     proper sort(1) option would  be  -k 8.   Older  versions  of
     sort(1)  do  not  support the -k option, but you can use the
     traditional + option instead, e.g., +6 instead of -k 7.  The
     sed(1) command filters out all but the first 15 lines of the
     listing.   Future  releases  of  zipinfo   may   incorporate
     date/time and filename sorting as built-in options.

TIPS
     The author finds it convenient to define  an  alias  ii  for
     zipinfo on systems that allow aliases (or, on other systems,
     copy/rename the executable, create a link or create  a  com-
     mand  file  with  the  name ii).  The ii usage parallels the
     common ll alias for long listings in Unix, and the  similar-
     ity between the outputs of the two commands was intentional.

BUGS
     As with unzip, zipinfo's  -M  (``more'')  option  is  overly
     simplistic in its handling of screen output; as noted above,
     it fails to detect  the  wrapping  of  long  lines  and  may
     thereby  cause lines at the top of the screen to be scrolled
     off before being read.  zipinfo should detect and treat each
     occurrence  of  line-wrap  as  one  additional line printed.
     This requires knowledge of the screen's width as well as its
     height.   In addition, zipinfo should detect the true screen
     geometry on all systems.

     zipinfo's listing-format behavior is  unnecessarily  complex
     and  should be simplified.  (This is not to say that it will
     be.)

SEE ALSO
     ls(1),  funzip(1),  unzip(1),  unzipsfx(1),   zip(1),   zip-
     cloak(1), zipnote(1), zipsplit(1)

URL
     The Info-ZIP home page is currently at
         http://www.info-zip.org/pub/infozip/
     or
         ftp://ftp.info-zip.org/pub/infozip/ .


AUTHOR
     Greg  ``Cave  Newt''  Roelofs.   ZipInfo  contains  pattern-
     matching  code  by Mark Adler and fixes/improvements by many
     others.  Please refer to the  CONTRIBS  file  in  the  UnZip
     source distribution for a more complete list.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

     _______________________________________
    |   ATTRIBUTE TYPE   |  ATTRIBUTE VALUE|
    |____________________|__________________|_
    | Availability       |  SUNWswmt       |
    |____________________|__________________|_
    | Interface Stability|  External       |
    |____________________|_________________|

NOTES
     Source code of unzip is available on the Info-ZIP  project's
     page http://www.info-zip.org and is used without any modifi-
     cations.










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