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ZIPINFO(1)                           General Commands Manual                           ZIPINFO(1)

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 specification 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 exclama‐
                     tion 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 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  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 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 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 headers (-h), trailers (-t) and zip‐
              file 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 com‐
              pressed 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  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 likeli‐
              hood 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 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 decimal format  (yymmdd.hhmmss).   The
              default  date  format  is  a more standard, human-readable version with abbreviated
              month names (see examples below).

       -U     [UNICODE_SUPPORT only] modify or disable UTF-8 handling.  When  UNICODE_SUPPORT  is
              available, the option -U forces unzip to escape all non-ASCII characters from UTF-8
              coded filenames as ``#Uxxxx''.  This option is mainly provided for  debugging  pur‐
              pose  when  the  fairly new UTF-8 support is suspected to mangle up extracted file‐
              names.

              The option -UU allows to entirely disable the recognition of  UTF-8  encoded  file‐
              names.   The  handling of filename codings within unzip falls back to the behaviour
              of previous versions.

       -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 capi‐
       talized.  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 character (`T' or `B').  The second character may also take on four val‐
       ues, 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  informa‐
       tion  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 exam‐
       ple 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) includ‐
       ing 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.  Interpretation of Macintosh file attributes is  unreli‐
       able 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,  shrinking,
       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  dictio‐
       nary,  and 2 or 3 Shannon-Fano trees); and four levels of deflating (superfast, fast, nor‐
       mal, maximum compression).  zipinfo represents these methods and their sub-methods as fol‐
       lows:   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  com‐
       pressed  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

       Note that because of limitations in the MS-DOS format used to store file times,  the  sec‐
       onds  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 zipfile 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 explicitly.  In such a case the listing format must also  be  speci‐
       fied  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 zip‐
       file comment, if any, and the type and number of bytes in any stored extra  fields.   Cur‐
       rently  known  types  of  extra fields include PKWARE's authentication (``AV'') info; OS/2
       extended attributes; VMS filesystem info, both PKWARE  and  Info-ZIP  versions;  Macintosh
       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 aver‐
       age compression ratio shown in the summary bottom line are calculated 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 under‐
       lying  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" com‐
       mand (except when individual 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 accomplished
       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  reason‐
       ably 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 environ‐
       ment variable), and ZIPINFO for all  other  operating  systems.   For  compatibility  with
       zip(1),  ZIPINFOOPT  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  contents  of  a  ZIP  archive  stor‐
       age.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  `*'  wild‐
       card,  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 environ‐
       ment 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  environment  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  specifica‐
       tion; the contents of all zipfiles 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 explicitly:

       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 con‐
       junction  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 tradi‐
       tional + 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 similarity 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.  zip‐
       info 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), zipcloak(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.

Info-ZIP                               20 April 2009 (v3.0)                            ZIPINFO(1)

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