funzip - filter for extracting from a ZIP archive in a pipe
funzip [-password] [archive[.zip|.gz]]
FUNZIP(1) General Commands Manual FUNZIP(1) NAME funzip - filter for extracting from a ZIP archive in a pipe SYNOPSIS funzip [-password] [archive[.zip|.gz]] ARGUMENTS [-password] Optional password to be used if ZIP archive is encrypted. Encryption support can be disabled at build time. See DESCRIP- TION for more details. [archive[.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 (non-directory) member from the ar- chive to standard output (stdout). When standard input (stdin) is a terminal (tty) device, fUnZip assumes that this cannot be a stream of (binary) compressed data and shows a short usage guide, 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 hyphen. Note that this constitutes a security risk on many systems; 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 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 Use fUnZip to extract the first (non-directory) member of the archive "test.zip", and to pipe it into more(1): funzip test.zip | more Use fUnZip to test the first (non-directory) member of "test.zip" (with any error messages sent to standard error (stderr)): funzip test.zip > /dev/null 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 exit- ing. 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 should reset the terminal properly. There is no way to extract any member except the first (non-directory) from a ZIP archive, but fUnZip will skip archive members which are directories, and extract the first member which is not a directory. Only Deflate compression and Traditional ZIP encryption are supported. The functionality of fUnZip should be incorporated into UnZip itself (in some future release). ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+------------------+ |Availability | compress/unzip | +---------------+------------------+ |Stability | Volatile | +---------------+------------------+ SEE ALSO gzip(1L), unzip(1L), unzipsfx(1L), zip(1L), zipcloak(1L), zipinfo(1L), zipnote(1L), zipsplit(1L) URL The Info-ZIP main Web page is: http://www.info-zip.org/ FTP access is available, too: ftp://ftp.info-zip.org/pub/infozip/ AUTHOR Mark Adler (Info-ZIP) NOTES This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from http://antinode.info/ftp/info- zip/unzip610c23.zip Further information about this software can be found on the open source community website at http://www.info-zip.org/UnZip.html. Info-ZIP 06 Nov 2013 (v4.10) FUNZIP(1)