- NetBSD Manual Pages
UNZIP(1) NetBSD General Commands Manual UNZIP(1)
Powered by man-cgi (2021-03-02).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
unzip -- extract files from a ZIP archive
unzip [-aCcfjLlnopqtuvy] [-d dir] [-x pattern] zipfile
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
-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
-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
-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 archive.
-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
-v List verbosely, rather than extract, the contents of the zip-
file. 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.
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.
The unzip utility aims to be sufficiently compatible with other implemen-
tations 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 zipfile's central directory. Since the archive(3) library
does not provide access to that information, it 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 characters 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 archives.
The unzip utility appeared in NetBSD 6.0.
The unzip utility and this manual page were written by Dag-Erling
Smørgrav <des@FreeBSD.org>. It uses the archive(3) library developed by
Tim Kientzle <kientzle@FreeBSD.org>.
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 nei-
ther the -n nor the -o command line option was specified.
NetBSD 9.1 December 21, 2015 NetBSD 9.1