FUNZIP

Section: User Commands (1)
Updated: 10 Sep 92 (v1.6)
Index Return to Main Contents
 

NAME

funzip - extract from a ZIP archive file as a filter  

SYNOPSIS

[...] | funzip [ -password ] | [...]

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

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.
 

DESCRIPTION

FUnZip acts as a filter; that is, it assumes that a ZIP archive is being piped into standard input, and it extracts the first member from the archive to stdout. If there is an argument, then the input comes 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. 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) 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).  

LIMITATIONS

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 directory, FUnZip simply creates the directory and exits.

FUnZip would be useful under OS/2, too.

The functionality of FUnZip should be included in UnZip directly (future release).  

SEE ALSO

unzip(1), zip(1), zipcloak(1), zipinfo(1), zipnote(1), zipsplit(1)  

AUTHOR

Mark Adler (Info-ZIP)


 

Index

NAME
SYNOPSIS
ARGUMENTS
DESCRIPTION
EXAMPLES
LIMITATIONS
SEE ALSO
AUTHOR

This document was created by man2html, using the manual pages.
Time: 10:12:55 GMT, January 08, 2023