Man Pages

funzip(1) - phpMan funzip(1) - phpMan

Command: man perldoc info search(apropos)  


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 systems; currently run-
       ning 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  secondary
       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 backups:

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

       (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 useful in  the
       case  where  a  ZIP archive is included within another archive.  In the case where the first member is a direc-
       tory, 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                     20 April 2009 (v3.95)                  FUNZIP(1L)