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NetBSD 6.1.5 - man page for unzip (netbsd section 1)

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UNZIP(1)			   BSD General Commands Manual				 UNZIP(1)

NAME
     unzip -- extract files from a ZIP archive

SYNOPSIS
     unzip [-aCcfjLlnopqtuvy] [-d dir] [-x pattern] zipfile

DESCRIPTION
     The following options are available:

     -a 	 When extracting a text file, convert DOS-style line endings to Unix-style line
		 endings.

     -C 	 Match file names case-insensitively.

     -c 	 Extract to stdout/screen.  When extracting files from the zipfile, they are
		 written to stdout.  This is similar to -p, but doesn't suppress normal output.

     -d dir	 Extract files into the specified directory rather than the current directory.

     -f 	 Update existing.  Extract only files from the zipfile if a file with the same
		 name already exists on disk and is older than the former.  Otherwise, the file
		 is silently skipped.

     -j 	 Ignore directories stored in the zipfile; instead, extract all files directly
		 into the extraction directory.

     -L 	 Convert the names of the extracted files and directories to lowercase.

     -l 	 List, rather than extract, the contents of the zipfile.

     -n 	 No overwrite.	When extracting a file from the zipfile, if a file with the same
		 name already exists on disk, the file is silently skipped.

     -o 	 Overwrite.  When extracting a file from the zipfile, if a file with the same
		 name already exists on disk, the existing file is replaced with the file from
		 the zipfile.

     -p 	 Extract to stdout.  When extracting files from the zipfile, they are written to
		 stdout.  The normal output is suppressed as if -q was specified.

     -q 	 Quiet: print less information while extracting.

     -t 	 Test: do not extract anything, but verify the checksum of every file in the ar-
		 chive.

     -u 	 Update.  When extracting a file from the zipfile, if a file with the same name
		 already exists on disk, the existing file is replaced with the file from the
		 zipfile if and only if the latter is newer than the former.  Otherwise, the file
		 is silently skipped.

     -v 	 List verbosely, rather than extract, the contents of the zipfile.  This differs
		 from -l by using the long listing.  Note that most of the data is currently fake
		 and does not reflect the content of the archive.

     -x pattern  Exclude files matching the pattern pattern.

     -y 	 Print four digit years in listings instead of two.

     Note that only one of -n, -o, and -u may be specified.

ENVIRONMENT
     If the UNZIP_DEBUG environment variable is defined, the -q command-line option has no
     effect, and additional debugging information will be printed to stderr.

COMPATIBILITY
     The unzip utility aims to be sufficiently compatible with other implementations to serve as
     a drop-in replacement in the context of the pkgsrc(7) system.  No attempt has been made to
     replicate functionality which is not required for that purpose.

     For compatibility reasons, command-line options will be recognized if they are listed not
     only before but also after the name of the zipfile.

     Normally, the -a option should only affect files which are marked as text files in the zip-
     file's central directory.	Since the archive(3) library reads zipfiles sequentially, and
     does not use the central directory, that information is not available to the unzip utility.
     Instead, the unzip utility will assume that a file is a text file if no non-ASCII characters
     are present within the first block of data decompressed for that file.  If non-ASCII charac-
     ters appear in subsequent blocks of data, a warning will be issued.

     The unzip utility is only able to process ZIP archives handled by libarchive(3).  Depending
     on the installed version of libarchive(3), this may or may not include self-extracting ar-
     chives.

SEE ALSO
     libarchive(3)

HISTORY
     The unzip utility appeared in NetBSD 6.0.

AUTHORS
     The unzip utility and this manual page were written by Dag-Erling Smorgrav
     <des@FreeBSD.org>.  It uses the archive(3) library developed by
     Tim Kientzle <kientzle@FreeBSD.org>.

BUGS
     The unzip utility currently does not support asking the user whether to overwrite or skip a
     file that already exists on disk.	To be on the safe side, it will fail if it encounters a
     file that already exists and neither the -n nor the -o command line option was specified.

BSD					 August 18, 2011				      BSD
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