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FUNZIP(1L)                                                                                        FUNZIP(1L)



NAME
       funzip - filter for extracting from a ZIP archive in a pipe

SYNOPSIS
       funzip [-password] [input[.zip|.gz]]

ARGUMENTS
       [-password]
              Optional  password to be used if ZIP archive is encrypted.  Decryption may not be supported at
              some sites.  See DESCRIPTION for more details.

       [input[.zip|.gz]]
              Optional input archive file specification. See DESCRIPTION for details.

DESCRIPTION
       funzip without a file argument acts as a filter; that is,  it  assumes  that  a  ZIP  archive  (or  a
       gzip'd(1) file) is being piped into standard input, and it extracts the first member from the archive
       to stdout.  When stdin comes from a tty device, funzip assumes  that  this  cannot  be  a  stream  of
       (binary)  compressed  data  and  shows a short help text, instead.  If there is a file argument, then
       input is read from the specified file instead of from stdin.

       A password for encrypted zip files can be specified on the command line (preceding the file name,  if
       any)  by prefixing the password with a dash.  Note that this constitutes a security risk on many sys-tems; systems;
       tems; currently running processes are often visible via simple commands (e.g., ps(1) under Unix), and
       command-line  histories can be read.  If the first entry of the zip file is encrypted and no password
       is specified on the command line, then the user is prompted for a password and the  password  is  not
       echoed on the console.

       Given  the  limitation  on single-member extraction, funzip is most useful in conjunction with a sec-ondary secondary
       ondary archiver program such as tar(1).  The following section includes an example illustrating  this
       usage in the case of disk backups to tape.

EXAMPLES
       To use funzip to extract the first member file of the archive test.zip and to pipe it into more(1):

           funzip test.zip | more

       To  use  funzip  to  test  the first member file of test.zip (any errors will be reported on standard
       error):

           funzip test.zip > /dev/null

       To use zip and funzip in place of compress(1) and zcat(1) (or gzip(1L) and gzcat(1L)) for tape  back-ups: backups:
       ups:

           tar cf - . | zip -7 | dd of=/dev/nrst0 obs=8k
           dd if=/dev/nrst0 ibs=8k | funzip | tar xf -(where, xf(where,

       (where, for example, nrst0 is a SCSI tape drive).

BUGS
       When  piping an encrypted file into more and allowing funzip to prompt for password, the terminal may
       sometimes be reset to a non-echo mode.  This is apparently due to a race condition  between  the  two
       programs;  funzip  changes  the  terminal mode to non-echo before more reads its state, and more then
       ``restores'' the terminal to this mode before exiting.  To recover, run funzip on the same  file  but
       redirect  to  /dev/null  rather than piping into more; after prompting again for the password, funzip
       will reset the terminal properly.

       There is presently no way to extract any member but the first from a ZIP archive.  This would be use-ful useful
       ful  in the case where a ZIP archive is included within another archive.  In the case where the first
       member is a directory, funzip simply creates the directory and exits.

       The functionality of funzip should be incorporated into unzip itself (future release).

SEE ALSO
       gzip(1L), unzip(1L), unzipsfx(1L), zip(1L), zipcloak(1L), zipinfo(1L), zipnote(1L), zipsplit(1L)

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
       Mark Adler (Info-ZIP)



Info-ZIP                                  28 February 2005 (v3.94)                                FUNZIP(1L)

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