ZIP(1L)                                                                ZIP(1L)

NAME
       zip, zipcloak, zipnote, zipsplit - package and compress (archive) files

SYNOPSIS
       zip   [-aABcdDeEfFghjklLmoqrRSTuvVwXyz!@$]   [-b path]    [-n suffixes]
       [-t mmddyyyy] [-tt mmddyyyy] [ zipfile [ file1 file2 ...]] [-xi list]

       zipcloak [-dhL] [-b path] zipfile

       zipnote [-hwL] [-b path] zipfile

       zipsplit [-hiLpst] [-n size] [-b path] zipfile

DESCRIPTION
       zip  is  a compression and file packaging utility for Unix, VMS, MSDOS,
       OS/2, Windows NT, Minix, Atari and Macintosh, Amiga and Acorn RISC  OS.

       It  is  analogous to a combination of the UNIX commands tar(1) and com-
       press(1) and is compatible with PKZIP (Phil Katz's ZIP for  MSDOS  sys-
       tems).

       A  companion  program  (unzip(1L)),  unpacks zip archives.  The zip and
       unzip(1L) programs can work with archives produced by PKZIP, and  PKZIP
       and  PKUNZIP  can work with archives produced by zip.  zip version 2.32
       is compatible with PKZIP 2.04.  Note that PKUNZIP 1.10  cannot  extract
       files produced by PKZIP 2.04 or zip 2.32. You must use PKUNZIP 2.04g or
       unzip 5.0p1 (or later versions) to extract them.

       For a brief help on zip and unzip,  run  each  without  specifying  any
       parameters on the command line.

       The  program  is  useful for packaging a set of files for distribution;
       for archiving files; and for saving disk space by temporarily compress-
       ing unused files or directories.

       The  zip  program  puts  one or more compressed files into a single zip
       archive, along with information about the files (name, path, date, time
       of  last modification, protection, and check information to verify file
       integrity).  An entire directory structure can be  packed  into  a  zip
       archive  with  a  single command.  Compression ratios of 2:1 to 3:1 are
       common for text files.  zip has one compression method (deflation)  and
       can  also  store  files without compression.  zip automatically chooses
       the better of the two for each file to be compressed.

       The basic command format is

              zip options archive inpattern inpattern ...

       where archive is a new or existing  zip  archive  and  inpattern  is  a
       directory  or file path optionally including wildcards.  When given the
       name of an existing zip archive, zip  will  replace  identically  named
       entries  in the zip archive or add entries for new names.  For example,
       if foo.zip exists and contains foo/file1 and foo/file2, and the  direc-
       tory foo contains the files foo/file1 and foo/file3, then:

              zip -r foo.zip foo

       or more concisely

              zip -r foo foo

       will  replace foo/file1 in foo.zip and add foo/file3 to foo.zip.  After
       this,  foo.zip  contains  foo/file1,  foo/file2,  and  foo/file3,  with
       foo/file2 unchanged from before.

       If  the file list is specified as -@, [Not on MacOS] zip takes the list
       of input files from standard input.  Under UNIX,  this  option  can  be
       used  to  powerful effect in conjunction with the find(1) command.  For
       example, to archive all the C source files in the current directory and
       its subdirectories:

              find . -name "*.[ch]" -print | zip source -@

       (note  that  the pattern "*.[ch]" must be quoted to keep the shell from
       expanding it).  zip will also accept a single dash  ("-")  as  the  zip
       file name, in which case it will write the zip file to standard output,
       allowing the output to be piped to another program. For example:

              zip -r - . | dd of=/dev/nrst0 obs=16k

       would write the zip output directly to a tape with the specified  block
       size for the purpose of backing up the current directory.

       zip  also  accepts a single dash ("-") as the name of a file to be com-
       pressed, in which case it will  read  the  file  from  standard  input,
       allowing zip to take input from another program. For example:

              tar cf - . | zip backup -

       would compress the output of the tar command for the purpose of backing
       up the current directory. This generally  produces  better  compression
       than  the  previous  example  using the -r option, because zip can take
       advantage of redundancy between files. The backup can be restored using
       the command

              unzip -p backup | tar xf -

       When  no  zip file name is given and stdout is not a terminal, zip acts
       as a filter, compressing standard input to standard output.  For  exam-
       ple,

              tar cf - . | zip | dd of=/dev/nrst0 obs=16k

       is equivalent to

              tar cf - . | zip - - | dd of=/dev/nrst0 obs=16k

       zip  archives  created in this manner can be extracted with the program
       funzip which is provided in the unzip package, or by  gunzip  which  is
       provided in the gzip package. For example:

              dd if=/dev/nrst0  ibs=16k | funzip | tar xvf -

       When  changing an existing zip archive, zip will write a temporary file
       with the new contents, and only replace the old one when the process of
       creating the new version has been completed without error.

       If  the  name  of  the  zip  archive does not contain an extension, the
       extension .zip is added. If the  name  already  contains  an  extension
       other than .zip the existing extension is kept unchanged.

OPTIONS
       -a     [Systems using EBCDIC] Translate file to ASCII format.

       -A     Adjust  self-extracting  executable  archive.  A self-extracting
              executable archive is created by prepending the SFX stub  to  an
              existing  archive.  The  -A option tells zip to adjust the entry
              offsets  stored  in  the  archive  to  take  into  account  this
              "preamble" data.

       Note:  self-extracting  archives  for the Amiga are a special case.  At
       present, only the Amiga port of zip is capable of adjusting or updating
       these  without  corrupting them.  -J can be used to remove the SFX stub
       if other updates need to be made.

       -B     [VM/CMS and MVS] force file to be read binary (default is text).

       -Bn    [TANDEM] set Edit/Enscribe formatting options with n defined as
              bit  0: Don't add delimiter (Edit/Enscribe)
              bit 1: Use LF rather than CR/LF as delimiter (Edit/Enscribe)
              bit  2: Space fill record to maximum record length (Enscribe)
              bit  3: Trim trailing space (Enscribe)
              bit 8: Force 30K (Expand) large read for unstructured files

       -b path
              Use  the specified path for the temporary zip archive. For exam-
              ple:

                     zip -b /tmp stuff *

              will put the temporary zip archive in the directory /tmp,  copy-
              ing  over  stuff.zip  to  the  current directory when done. This
              option is only useful when updating an existing archive, and the
              file  system  containing  this  old archive does not have enough
              space to hold both old and new archives at the same time.

       -c     Add one-line comments for each file.  File  operations  (adding,
              updating)  are  done  first, and the user is then prompted for a
              one-line comment for each file.  Enter the comment  followed  by
              return, or just return for no comment.

       -d     Remove (delete) entries from a zip archive.  For example:

                     zip -d foo foo/tom/junk foo/harry/\* \*.o

              will  remove the entry foo/tom/junk, all of the files that start
              with foo/harry/, and all of the files that end with .o  (in  any
              path).   Note  that  shell pathname expansion has been inhibited
              with backslashes, so that zip can see  the  asterisks,  enabling
              zip  to  match on the contents of the zip archive instead of the
              contents of the current directory.  You can also use  quotes  to
              escape wildcards, as in

                     zip -d foo foo/tom/junk "foo/harry/*" "*.o"

              Under systems where the shell does not expand wildcards, such as
              MSDOS, the backslashes are not needed.  The above would then be

                     zip -d foo foo/tom/junk foo/harry/* *.o

              Under MSDOS, -d is case sensitive when it matches names  in  the
              zip  archive.  This requires that file names be entered in upper
              case if they were zipped by PKZIP on an MSDOS system.

       -df    [MacOS] Include only data-fork of files zipped into the archive.
              Good   for   exporting   files   to  foreign  operating-systems.
              Resource-forks will be ignored at all.

       -D     Do not create  entries  in  the  zip  archive  for  directories.
              Directory   entries   are  created  by  default  so  that  their
              attributes can be saved in the  zip  archive.   The  environment
              variable  ZIPOPT  can be used to change the default options. For
              example under Unix with sh:

                     ZIPOPT="-D"; export ZIPOPT

              (The variable ZIPOPT can be used for any option except -i and -x
              and  can  include several options.) The option -D is a shorthand
              for -x "*/" but the latter cannot  be  set  as  default  in  the
              ZIPOPT environment variable.

       -e     Encrypt  the  contents of the zip archive using a password which
              is entered on the terminal in response to a  prompt  (this  will
              not  be  echoed;  if  standard error is not a tty, zip will exit
              with an error).  The password prompt is  repeated  to  save  the
              user  from typing errors.  Note that this encrypts with standard
              pkzip encryption which is considered weak.

       -E     [OS/2] Use the .LONGNAME Extended Attribute (if found) as  file-
              name.

       -f     Replace  (freshen)  an existing entry in the zip archive only if
              it has been modified more recently than the version  already  in
              the  archive;  unlike  the  update option (-u) this will not add
              files that are not already in the zip archive.  For example:

                     zip -f foo

              This command should be run from the same  directory  from  which
              the  original  zip  command  was  run, since paths stored in zip
              archives are always relative.

              Note that the timezone environment variable  TZ  should  be  set
              according  to the local timezone in order for the -f , -u and -o
              options to work correctly.  The reasons behind this are somewhat
              subtle but have to do with the differences between the Unix-for-
              mat file times (always in GMT) and most of the  other  operating
              systems  (always  local  time)  and the necessity to compare the
              two.  A typical TZ value is ``MET-1MEST'' (Middle European  time
              with automatic adjustment for ``summertime'' or Daylight Savings
              Time).

       -F     Fix the zip archive. This option can be used if some portions of
              the  archive  are  missing. It is not guaranteed to work, so you
              MUST make a backup of the original archive first.

              When doubled as in -FF the compressed  sizes  given  inside  the
              damaged archive are not trusted and zip scans for special signa-
              tures to identify the limits between the  archive  members.  The
              single  -F  is more reliable if the archive is not too much dam-
              aged, for example if it has only been  truncated,  so  try  this
              option first.

              Neither  option will recover archives that have been incorrectly
              transferred in ascii mode instead of binary. After  the  repair,
              the  -t option of unzip may show that some files have a bad CRC.
              Such files cannot be recovered; you can  remove  them  from  the
              archive using the -d option of zip.

       -g     Grow  (append to) the specified zip archive, instead of creating
              a new one. If this operation fails, zip attempts to restore  the
              archive  to  its  original  state. If the restoration fails, the
              archive might become corrupted.  This  option  is  ignored  when
              there's  no existing archive or when at least one archive member
              must be updated or deleted.

       -h     Display the zip help information (this also appears  if  zip  is
              run with no arguments).

       -i files
              Include only the specified files, as in:

                     zip -r foo . -i \*.c

              which  will include only the files that end in .c in the current
              directory and its subdirectories. (Note  for  PKZIP  users:  the
              equivalent command is

                     pkzip -rP foo *.c

              PKZIP  does  not  allow  recursion in directories other than the
              current one.)  The backslash avoids the shell filename substitu-
              tion,  so  that  the  name  matching  is performed by zip at all
              directory levels.  Not escaping  wildcards  on  shells  that  do
              wildcard  substitution before zip gets the command line may seem
              to work but files in subdirectories matching  the  pattern  will
              never  be checked and so not matched.  For shells, such as Win32
              command prompts, that do not replace  file  patterns  containing
              wildcards with the respective file names, zip will do the recur-
              sion and escaping the wildcards is not needed.

              Also possible:

                     zip -r foo  . -i@include.lst

              which will only include the files in the current  directory  and
              its   subdirectories   that  match  the  patterns  in  the  file
              include.lst, one file pattern per line.

       -I     [Acorn RISC OS] Don't scan through Image files.  When used,  zip
              will  not  consider  Image  files  (eg.  DOS partitions or Spark
              archives when SparkFS is loaded) as directories but  will  store
              them as single files.

              For example, if you have SparkFS loaded, zipping a Spark archive
              will result in a zipfile containing a directory  (and  its  con-
              tent)  while  using the 'I' option will result in a zipfile con-
              taining a Spark archive. Obviously this second case will also be
              obtained (without the 'I' option) if SparkFS isn't loaded.

       -j     Store  just the name of a saved file (junk the path), and do not
              store directory names. By default, zip will store the full  path
              (relative to the current path).

       -jj    [MacOS] record Fullpath (+ Volname). The complete path including
              volume will be stored. By default  the  relative  path  will  be
              stored.

       -J     Strip any prepended data (e.g. a SFX stub) from the archive.

       -k     Attempt  to  convert  the  names  and paths to conform to MSDOS,
              store only the MSDOS attribute (just the  user  write  attribute
              from  UNIX), and mark the entry as made under MSDOS (even though
              it was not); for compatibility with PKUNZIP  under  MSDOS  which
              cannot handle certain names such as those with two dots.

       -l     Translate  the Unix end-of-line character LF into the MSDOS con-
              vention CR LF. This option should not be used on  binary  files.
              This  option can be used on Unix if the zip file is intended for
              PKUNZIP under MSDOS. If the input files already contain  CR  LF,
              this option adds an extra CR. This ensures that unzip -a on Unix
              will get back an exact copy of the original file,  to  undo  the
              effect  of  zip  -l.   See  the note on binary detection for -ll
              below.

       -ll    Translate the MSDOS end-of-line CR LF into Unix LF.  This option
              should  not be used on binary files and a warning will be issued
              when a file is converted that later is detected  to  be  binary.
              This option can be used on MSDOS if the zip file is intended for
              unzip under Unix.

              In Zip 2.31 and later, binary detection has been changed from  a
              simple  percentage  of binary characters being considered binary
              to a more selective method that should consider  files  in  many
              character  sets, including UTF-8, that only include text charac-
              ters in that character set to be text.  This allows unzip -a  to
              convert these files.

       -L     Display the zip license.

       -m     Move  the  specified  files into the zip archive; actually, this
              deletes the target directories/files after making the  specified
              zip  archive.  If a directory becomes empty after removal of the
              files, the directory is also  removed.  No  deletions  are  done
              until zip has created the archive without error.  This is useful
              for conserving disk space, but is potentially dangerous so it is
              recommended to use it in combination with -T to test the archive
              before removing all input files.

       -MM    All input patterns must match at least one file  and  all  input
              files  found  must  be readable.  Normally when an input pattern
              does not match a file the "name not matched" warning  is  issued
              and  when  an  input file has been found but later is missing or
              not readable a missing or not readable warning  is  issued.   In
              either  case zip continues creating the archive, with missing or
              unreadable new files being skipped  and  files  already  in  the
              archive  remaining  unchanged.  After the archive is created, if
              any files were not readable zip returns the OPEN error code  (18
              on most systems) instead of the normal success return (0 on most
              systems).  With -MM set, zip exits as soon as an  input  pattern
              is not matched (whenever the "name not matched" warning would be
              issued) or when an input file is not readable.  In  either  case
              zip exits with an OPEN error and no archive is created.

              This option is useful when a known list of files is to be zipped
              so any missing or unreadable files will result in an error.   It
              is less useful when used with wildcards, but zip will still exit
              with an error if any input pattern doesn't match  at  least  one
              file  and  if  any matched files are unreadable.  If you want to
              create the archive anyway and only need to know  if  files  were
              skipped, don't use -MM and just check the return code.

       -n suffixes
              Do  not attempt to compress files named with the given suffixes.
              Such files are simply stored (0% compression) in the output  zip
              file,  so  that  zip  doesn't  waste its time trying to compress
              them.  The suffixes are separated  by  either  colons  or  semi-
              colons.  For example:

                     zip -rn .Z:.zip:.tiff:.gif:.snd  foo foo

              will  copy  everything from foo into foo.zip, but will store any
              files that end in .Z, .zip, .tiff, .gif, or .snd without  trying
              to  compress  them  (image  and sound files often have their own
              specialized compression methods).  By default, zip does not com-
              press      files     with     extensions     in     the     list
              .Z:.zip:.zoo:.arc:.lzh:.arj.  Such files are stored directly  in
              the output archive.  The environment variable ZIPOPT can be used
              to change the default options. For example under Unix with csh:

                     setenv ZIPOPT "-n .gif:.zip"

              To attempt compression on all files, use:

                     zip -n : foo

              The maximum compression option -9 also attempts  compression  on
              all files regardless of extension.

              On  Acorn RISC OS systems the suffixes are actually filetypes (3
              hex digit format). By default, zip does not compress files  with
              filetypes  in the list DDC:D96:68E (i.e. Archives, CFS files and
              PackDir files).

       -N     [Amiga, MacOS] Save Amiga or MacOS  filenotes  as  zipfile  com-
              ments.  They can be restored by using the -N option of unzip. If
              -c is used also, you are prompted for comments  only  for  those
              files that do not have filenotes.

       -o     Set  the  "last  modified" time of the zip archive to the latest
              (oldest) "last modified" time found among the entries in the zip
              archive.   This  can  be  used  without any other operations, if
              desired.  For example:

                     zip -o foo

              will change the last modified time of foo.zip to the latest time
              of the entries in foo.zip.

       -P password
              use password to encrypt zipfile entries (if any).  THIS IS INSE-
              CURE!  Many multi-user operating 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 pass-
              words.  (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     Quiet  mode;  eliminate  informational  messages   and   comment
              prompts.   (Useful, for example, in shell scripts and background
              tasks).

       -Qn    [QDOS] store information about the file in the file header  with
              n defined as
              bit  0: Don't add headers for any file
              bit  1: Add headers for all files
              bit  2: Don't wait for interactive key press on exit

       -r     Travel the directory structure recursively; for example:

                     zip -r foo.zip foo

              or a bit more concisely

                     zip -r foo foo

              In  this case, all the files and directories in foo are saved in
              a zip archive named foo.zip, including files with names starting
              with ".", since the recursion does not use the shell's file-name
              substitution mechanism.  If you wish to include only a  specific
              subset of the files in directory foo and its subdirectories, use
              the -i option to specify the pattern of files  to  be  included.
              You  should  not  use  -r with the name ".*", since that matches
              ".."  which will attempt to zip up the parent directory  (proba-
              bly not what was intended).

       -R     Travel  the directory structure recursively starting at the cur-
              rent directory; for example:

                     zip -R foo '*.c'

              In this case, all the files matching *.c in the tree starting at
              the  current  directory  are  stored  into  a  zip archive named
              foo.zip.  Note for PKZIP users: the equivalent command is

                     pkzip -rP foo *.c

       -S     [MSDOS, OS/2, WIN32 and ATARI] Include system and hidden  files.
              [MacOS]  Includes finder invisible files, which are ignored oth-
              erwise.

       -t mmddyyyy
              Do not operate on files modified prior to  the  specified  date,
              where mm is the month (0-12), dd is the day of the month (1-31),
              and yyyy is the year.  The ISO 8601 date  format  yyyy-mm-dd  is
              also accepted.  For example:

                     zip -rt 12071991 infamy foo

                     zip -rt 1991-12-07 infamy foo

              will  add  all the files in foo and its subdirectories that were
              last modified on or after 7 December 1991, to  the  zip  archive
              infamy.zip.

       -tt mmddyyyy
              Do not operate on files modified after or at the specified date,
              where mm is the month (0-12), dd is the day of the month (1-31),
              and  yyyy  is  the year.  The ISO 8601 date format yyyy-mm-dd is
              also accepted.  For example:

                     zip -rtt 11301995 infamy foo

                     zip -rtt 1995-11-30 infamy foo

              will add all the files in foo and its subdirectories  that  were
              last  modified  before  30  November  1995,  to  the zip archive
              infamy.zip.

       -T     Test the integrity of the new zip file. If the check fails,  the
              old  zip  file  is  unchanged  and (with the -m option) no input
              files are removed.

       -u     Replace (update) an existing entry in the zip archive only if it
              has  been modified more recently than the version already in the
              zip archive.  For example:

                     zip -u stuff *

              will add any new files in the current directory, and update  any
              files  which  have been modified since the zip archive stuff.zip
              was last created/modified (note that zip will not  try  to  pack
              stuff.zip into itself when you do this).

              Note  that  the  -u  option  with  no arguments acts like the -f
              (freshen) option.

       -v     Verbose mode or print diagnostic version info.

              Normally, when applied to real operations, this  option  enables
              the  display  of  a  progress  indicator  during compression and
              requests verbose diagnostic info about zipfile  structure  oddi-
              ties.

              When  -v  is the only command line argument, and either stdin or
              stdout is not redirected to  a  file,  a  diagnostic  screen  is
              printed.  In  addition  to  the  help screen header with program
              name, version, and release date, some pointers to  the  Info-ZIP
              home  and  distribution sites are given. Then, it shows informa-
              tion about the target environment (compiler type and version, OS
              version, compilation date and the enabled optional features used
              to create the zip executable.

       -V     [VMS] Save VMS file  attributes  and  use  portable  form.   zip
              archives created with this option are truncated at EOF but still
              may not be usable on other systems depending on the  file  types
              being zipped.

       -VV    [VMS]  Save VMS file attributes.  zip archives created with this
              option include the entire file and should be  able  to  recreate
              most  VMS files on VMS systems but these archives will generally
              not be usable on other systems.

       -w     [VMS] Append the version  number  of  the  files  to  the  name,
              including  multiple  versions  of files.  (default: use only the
              most recent version of a specified file).

       -x files
              Explicitly exclude the specified files, as in:

                     zip -r foo foo -x \*.o

              which will include the contents of foo in foo.zip while  exclud-
              ing  all  the  files  that  end in .o.  The backslash avoids the
              shell filename substitution, so that the name matching  is  per-
              formed  by  zip  at  all directory levels.  If you do not escape
              wildcards in patterns it may seem to work but files in subdirec-
              tories will not be checked for matches.

              Also possible:

                     zip -r foo foo -x@exclude.lst

              which  will include the contents of foo in foo.zip while exclud-
              ing  all  the  files  that  match  the  patterns  in  the   file
              exclude.lst (each file pattern on a separate line).

       -X     Do  not save extra file attributes (Extended Attributes on OS/2,
              uid/gid and file times on Unix).

       -y     Store symbolic links as such in the zip archive, instead of com-
              pressing  and  storing  the  file  referred to by the link (UNIX
              only).

       -z     Prompt for a multi-line comment for the entire zip archive.  The
              comment  is  ended by a line containing just a period, or an end
              of file condition (^D on UNIX, ^Z on MSDOS, OS/2, and VMS).  The
              comment can be taken from a file:

                     zip -z foo < foowhat

       -#     Regulate  the  speed of compression using the specified digit #,
              where -0 indicates no compression (store all  files),  -1  indi-
              cates  the  fastest compression method (less compression) and -9
              indicates the slowest compression method  (optimal  compression,
              ignores the suffix list). The default compression level is -6.

       -!     [WIN32]  Use  priviliges  (if  granted) to obtain all aspects of
              WinNT security.

       -@     Take the list of input files from standard input. Only one file-
              name per line.

       -$     [MSDOS,  OS/2,  WIN32]  Include  the  volume label for the drive
              holding the first file to be compressed.  If you want to include
              only  the  volume  label  or  to force a specific drive, use the
              drive name as first file name, as in:

                     zip -$ foo a: c:bar

EXAMPLES
       The simplest example:

              zip stuff *

       creates the archive stuff.zip (assuming it does not exist) and puts all
       the  files in the current directory in it, in compressed form (the .zip
       suffix is added automatically, unless that archive name given  contains
       a  dot  already;  this  allows the explicit specification of other suf-
       fixes).

       Because of the way the shell does filename substitution, files starting
       with "." are not included; to include these as well:

              zip stuff .* *

       Even  this  will not include any subdirectories from the current direc-
       tory.

       To zip up an entire directory, the command:

              zip -r foo foo

       creates the archive foo.zip, containing all the files  and  directories
       in the directory foo that is contained within the current directory.

       You  may  want  to  make  a zip archive that contains the files in foo,
       without recording the directory name, foo.  You can use the  -j  option
       to leave off the paths, as in:

              zip -j foo foo/*

       If  you are short on disk space, you might not have enough room to hold
       both the  original  directory  and  the  corresponding  compressed  zip
       archive.   In  this case, you can create the archive in steps using the
       -m option.  If foo contains the subdirectories tom,  dick,  and  harry,
       you can:

              zip -rm foo foo/tom
              zip -rm foo foo/dick
              zip -rm foo foo/harry

       where  the  first  command creates foo.zip, and the next two add to it.
       At the completion of each zip command,  the  last  created  archive  is
       deleted, making room for the next zip command to function.

PATTERN MATCHING
       This  section  applies  only  to  UNIX, though the ?, *, and [] special
       characters are implemented on other systems including MSDOS and  Win32.
       Watch this space for details on MSDOS and VMS operation.

       The  UNIX shells (sh(1) and csh(1)) do filename substitution on command
       arguments.  The special characters are:

       ?      match any single character

       *      match any number of characters (including none)

       []     match any character in the range indicated within  the  brackets
              (example: [a-f], [0-9]).

       When  these  characters  are  encountered (without being escaped with a
       backslash or quotes), the shell will look for  files  relative  to  the
       current  path  that  match the pattern, and replace the argument with a
       list of the names that matched.

       The zip program can do the same matching on names that are in  the  zip
       archive  being  modified  or,  in  the  case  of the -x (exclude) or -i
       (include) options, on the list of files to be  operated  on,  by  using
       backslashes  or  quotes to tell the shell not to do the name expansion.
       In general, when zip encounters a name in the list of files to  do,  it
       first  looks  for the name in the file system.  If it finds it, it then
       adds it to the list of files to do.  If it does not find it,  it  looks
       for  the  name  in the zip archive being modified (if it exists), using
       the pattern matching characters described above, if present.  For  each
       match,  it  will  add  that  name to the list of files to be processed,
       unless this name matches one given with the  -x  option,  or  does  not
       match any name given with the -i option.

       The pattern matching includes the path, and so patterns like \*.o match
       names that end in ".o", no matter what the path prefix is.   Note  that
       the  backslash must precede every special character (i.e. ?*[]), or the
       entire argument must be enclosed in double quotes ("").

       In general, use backslash to make zip do the pattern matching with  the
       -f  (freshen)  and  -d  (delete)  options,  and  sometimes after the -x
       (exclude) option when used with an appropriate operation (add, -u,  -f,
       or -d).

ENVIRONMENT
       ZIPOPT contains default options that will be used when running zip

       ZIP    [Not on RISC OS and VMS] see ZIPOPT

       Zip$Options
              [RISC OS] see ZIPOPT

       Zip$Exts
              [RISC  OS]  contains extensions separated by a : that will cause
              native filenames with one of  the  specified  extensions  to  be
              added to the zip file with basename and extension swapped.  zip

       ZIP_OPTS
              [VMS] see ZIPOPT

SEE ALSO
       compress(1), shar(1L), tar(1), unzip(1L), gzip(1L)

DIAGNOSTICS
       The exit status (or error level) approximates the exit codes defined by
       PKWARE and takes on the following values, except under VMS:

              0      normal; no errors or warnings detected.

              2      unexpected end of zip file.

              3      a generic error in the zipfile format was detected.  Pro-
                     cessing may have completed successfully anyway; some bro-
                     ken zipfiles created by other archivers have simple work-
                     arounds.

              4      zip was unable to allocate memory for one or more buffers
                     during program initialization.

              5      a severe error in the zipfile format was detected.   Pro-
                     cessing probably failed immediately.

              6      entry too large to split (with zipsplit), read, or write

              7      invalid comment format

              8      zip -T failed or out of memory

              9      the user aborted zip prematurely with control-C (or simi-
                     lar)

              10     zip encountered an error while using a temp file

              11     read or seek error

              12     zip has nothing to do

              13     missing or empty zip file

              14     error writing to a file

              15     zip was unable to create a file to write to

              16     bad command line parameters

              18     zip could not open a specified file to read

       VMS interprets standard Unix (or PC) return values as  other,  scarier-
       looking  things,  so zip instead maps them into VMS-style status codes.
       The current mapping is as follows:   1 (success) for normal exit,
        and (0x7fff000? + 16*normal_zip_exit_status) for all errors, where the
       `?' is 0 (warning) for zip value 12, 2 (error) for the zip values 3, 6,
       7, 9, 13, 16, 18, and 4 (fatal error) for the remaining ones.

BUGS
       zip 2.32 is not compatible with PKUNZIP 1.10. Use zip  1.1  to  produce
       zip files which can be extracted by PKUNZIP 1.10.

       zip  files produced by zip 2.32 must not be updated by zip 1.1 or PKZIP
       1.10, if they contain encrypted members or if they have  been  produced
       in a pipe or on a non-seekable device. The old versions of zip or PKZIP
       would create an archive with an incorrect format.  The old versions can
       list the contents of the zip file but cannot extract it anyway (because
       of the new compression algorithm).  If you do not  use  encryption  and
       use regular disk files, you do not have to care about this problem.

       Under  VMS, not all of the odd file formats are treated properly.  Only
       stream-LF format zip files are expected to work with zip.   Others  can
       be  converted  using  Rahul  Dhesi's BILF program.  This version of zip
       handles some of the conversion internally.  When using Kermit to trans-
       fer zip files from Vax to MSDOS, type "set file type block" on the Vax.
       When transferring from MSDOS to Vax, type "set file type fixed" on  the
       Vax.  In both cases, type "set file type binary" on MSDOS.

       Under  VMS,  zip  hangs  for file specification that uses DECnet syntax
       foo::*.*.

       On OS/2, zip cannot match some names, such as those including an excla-
       mation  mark  or a hash sign.  This is a bug in OS/2 itself: the 32-bit
       DosFindFirst/Next don't find such names.  Other programs  such  as  GNU
       tar are also affected by this bug.

       Under  OS/2, the amount of Extended Attributes displayed by DIR is (for
       compatibility) the amount returned by the 16-bit version  of  DosQuery-
       PathInfo().  Otherwise OS/2 1.3 and 2.0 would report different EA sizes
       when DIRing a file.  However, the  structure  layout  returned  by  the
       32-bit  DosQueryPathInfo()  is  a  bit different, it uses extra padding
       bytes and link pointers (it's a linked list)  to  have  all  fields  on
       4-byte  boundaries for portability to future RISC OS/2 versions. There-
       fore the value reported by zip (which uses this 32-bit-mode size)  dif-
       fers  from  that  reported  by  DIR.   zip stores the 32-bit format for
       portability, even the 16-bit MS-C-compiled version running on OS/2 1.3,
       so even this one shows the 32-bit-mode size.

       Development  of  zip 3.0  and unzip 6.0 are underway.  See those source
       distributions for many new features and the latest bug fixes.

AUTHORS
       Copyright (C) 1997-2006 Info-ZIP.

       Copyright (C) 1990-1997 Mark Adler, Richard B. Wales, Jean-loup Gailly,
       Onno  van  der Linden, Kai Uwe Rommel, Igor Mandrichenko, John Bush and
       Paul Kienitz.  Permission is granted to any individual  or  institution
       to use, copy, or redistribute this software so long as all of the orig-
       inal files are included, that it is not sold for profit, and that  this
       copyright notice is retained.

       LIKE  ANYTHING  ELSE  THAT'S FREE, ZIP AND ITS ASSOCIATED UTILITIES ARE
       PROVIDED AS IS AND COME WITH NO WARRANTY OF ANY KIND, EITHER  EXPRESSED
       OR  IMPLIED.  IN  NO EVENT WILL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
       DAMAGES RESULTING FROM THE USE OF THIS SOFTWARE.

       Please send bug reports and comments to: zip-bugs at  www.info-zip.org.
       For  bug  reports,  please include the version of zip (see zip -h), the
       make options used to compile it (see zip -v), the machine and operating
       system in use, and as much additional information as possible.

ACKNOWLEDGEMENTS
       Thanks  to  R. P. Byrne for his Shrink.Pas program, which inspired this
       project, and from which the shrink algorithm was stolen; to  Phil  Katz
       for  placing in the public domain the zip file format, compression for-
       mat, and .ZIP filename extension, and for accepting  minor  changes  to
       the  file  format; to Steve Burg for clarifications on the deflate for-
       mat; to Haruhiko Okumura and Leonid Broukhis for providing some  useful
       ideas  for  the  compression  algorithm; to Keith Petersen, Rich Wales,
       Hunter Goatley and Mark Adler for providing a mailing list and ftp site
       for  the  Info-ZIP  group to use; and most importantly, to the Info-ZIP
       group itself (listed in the file infozip.who)  without  whose  tireless
       testing  and bug-fixing efforts a portable zip would not have been pos-
       sible.  Finally we should thank (blame) the first  Info-ZIP  moderator,
       David  Kirschbaum,  for  getting  us into this mess in the first place.
       The manual page was rewritten for UNIX by R. P. C. Rodgers.

Info-ZIP                     19 June 2006 (v2.32)                      ZIP(1L)