177 lines
5.2 KiB
Groff
177 lines
5.2 KiB
Groff
.\"-
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.\" Copyright (c) 2007-2008 Dag-Erling Coïdan Smørgrav
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd February 16, 2010
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.Dt UNZIP 1
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.Os
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.Sh NAME
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.Nm unzip
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.Nd extract files from a ZIP archive
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.Sh SYNOPSIS
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.Nm
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.Op Fl aCcfjLlnopqtuv
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.Op Fl d Ar dir
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.Ar zipfile
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.Sh DESCRIPTION
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.\" ...
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.Pp
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The following options are available:
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.Bl -tag -width Fl
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.It Fl a
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When extracting a text file, convert DOS-style line endings to
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Unix-style line endings.
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.It Fl C
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Match file names case-insensitively.
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.It Fl c
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Extract to stdout/screen.
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When extracting files from the zipfile, they are written to stdout.
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This is similar to
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.Fl p ,
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but doesn't suppress normal output.
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.It Fl d Ar dir
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Extract files into the specified directory rather than the current
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directory.
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.It Fl f
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Update existing.
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Extract only files from the zipfile if a file with the same name
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already exists on disk and is older than the former.
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Otherwise, the file is silently skipped.
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.It Fl j
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Ignore directories stored in the zipfile; instead, extract all files
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directly into the extraction directory.
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.It Fl L
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Convert the names of the extracted files and directories to lowercase.
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.It Fl l
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List, rather than extract, the contents of the zipfile.
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.It Fl n
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No overwrite.
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When extracting a file from the zipfile, if a file with the same name
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already exists on disk, the file is silently skipped.
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.It Fl o
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Overwrite.
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When extracting a file from the zipfile, if a file with the same name
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already exists on disk, the existing file is replaced with the file
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from the zipfile.
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.It Fl p
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Extract to stdout.
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When extracting files from the zipfile, they are written to stdout.
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The normal output is suppressed as if
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.Fl q
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was specified.
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.It Fl q
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Quiet: print less information while extracting.
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.It Fl t
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Test: do not extract anything, but verify the checksum of every file
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in the archive.
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.It Fl u
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Update.
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When extracting a file from the zipfile, if a file with the same name
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already exists on disk, the existing file is replaced with the file
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from the zipfile if and only if the latter is newer than the former.
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Otherwise, the file is silently skipped.
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.It Fl v
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List verbosely, rather than extract, the contents of the zipfile.
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This differs from
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.Fl l
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by using the long listing.
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Note that most of the data is currently fake and does not reflect the
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content of the archive.
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.It Fl x Ar pattern
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Exclude files matching the pattern
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.Ar pattern .
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.El
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.Pp
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Note that only one of
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.Fl n ,
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.Fl o ,
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and
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.Fl u
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may be specified.
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.Sh ENVIRONMENT
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If the
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.Ev UNZIP_DEBUG
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environment variable is defined, the
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.Fl q
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command-line option has no effect, and additional debugging
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information will be printed to
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.Va stderr .
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.Sh COMPATIBILITY
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The
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.Nm
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utility aims to be sufficiently compatible with other implementations
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to serve as a drop-in replacement in the context of the
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.Xr ports 7
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system.
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No attempt has been made to replicate functionality which is not
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required for that purpose.
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.Pp
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For compatibility reasons, command-line options will be recognized if
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they are listed not only before but also after the name of the
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zipfile.
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.Pp
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Normally, the
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.Fl a
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option should only affect files which are marked as text files in the
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zipfile's central directory.
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Since the
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.Xr archive 3
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library reads zipfiles sequentially, and does not use the central
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directory, that information is not available to the
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.Nm
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utility.
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Instead, the
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.Nm
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utility will assume that a file is a text file if no non-ASCII
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characters are present within the first block of data decompressed for
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that file.
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If non-ASCII characters appear in subsequent blocks of data, a warning
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will be issued.
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.Pp
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The
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.Nm
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utility is only able to process ZIP archives handled by
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.Xr libarchive 3 .
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Depending on the installed version of
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.Xr libarchive ,
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this may or may not include self-extracting archives.
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.Sh SEE ALSO
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.Xr libarchive 3
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.Sh HISTORY
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The
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.Nm
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utility appeared in
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.Fx 8.0 .
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.Sh AUTHORS
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The
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.Nm
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utility and this manual page were written by
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.An Dag-Erling Sm\(/orgrav Aq des@FreeBSD.org .
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It uses the
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.Xr archive 3
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library developed by
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.An Tim Kientzle Aq kientzle@FreeBSD.org .
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