UNZIP
__________________________________________________________________________
This is the Info-ZIP file ``Where,'' last updated on 6 February 1994.
__________________________________________________________________________
Note that some ftp sites may not yet have the latest versions of
Zip and UnZip when you read this. The latest versions, including
the crypt sources, are always in ftp.uu.net:/pub/archiving/zip/...
SITE OWNERS: If you're listed in here but the information is not
correct (or if you're a big or overseas site but aren't listed at
all), please let us know! E-mail to zip-bugs at the address given
in README and we'll update this file.
__________________________________________________________________________
Basic source-archive names for Info-ZIP's portable Zip, UnZip, and related
utilities (on some ftp sites, the .zip files may have a .zoo equivalent
in Zoo 2.10 format):
zip201.zip Zip 2.0.1 (deflation; includes zipnote, zipsplit)
zip201.tar.Z ditto, compress'd tar format
zip11.zip Zip 1.1 (shrinking, implosion; compatible with PKUNZIP 1.1)
zip11.tar.Z ditto, compress'd tar format
unzip51.zip UnZip 5.1 (all methods supported; includes zipinfo, funzip)
unzip51.tar.Z ditto, compress'd tar format
wunz20sr.zip WizUnZip 2.0 sources for Windows 3.x; based on UnZip 5.0p1
zcrypt21.zip encryption/decryption support (includes zipcloak)
Related archives and files:
UnzpHist.zip complete changes history of UnZip and precursors
zip201x.zip MSDOS executables and docs for zip, zipnote, zipsplit
zcryp20x.zip MSDOS encryption executables and docs for zip, zipcloak
unzip51.exe MSDOS self-extracting executable (contains unzip, docs)
zip201x1.zip OS/2 1.x 16-bit executables and docs
zip201x2.zip OS/2 2.x 32-bit executables and docs
unz51x1.exe OS/2 1.x 16-bit executables and docs
unz51x2.exe OS/2 2.x 32-bit executables and docs
zip201vms.zip VMS executables and docs for zip, zipnote, zipsplit
unz51vms.exe VMS executable for unzip
unz51vms.zip VMS executable for funzip; documentation
mac-unzip-51.hqx Macintosh executable (unzip only, zip not done yet).
wunz20x.zip WizUnZip 2.0 executable/docs for Windows & NT 3.1, OS/2 2.1
wunl20x.zip same as wunz20x.zip, plus two DLLs for Win 3.0 and OS/2 2.0
pkz204g.exe MS-DOS PKZIP/PKUNZIP 2.04g (self-extracting archive)
pkz110eu.exe MS-DOS PKZIP/PKUNZIP 1.1 (self-extracting)
pkz102-2.exe OS/2 PKZIP/PKUNZIP 1.02 (self-extracting)
ftp sites for the US-exportable sources and executables:
NOTE: Look for the file names given above in the following
directories. Some sites like to use slightly different names,
such as zip-2.0.1.tar-z instead of zip201.tar.Z, or MacUnZip-5.1.hqx
instead of mac-unzip-51.hqx. In the case of some comp.sources.misc
archive sites, directories may be used (zip201/part01.Z ... part11.Z,
zip201/patch01.Z, etc.).
ftp.uu.net:/pub/archiving/zip/... [THIS MIRRORS THE INFO-ZIP HOME SITE]
oak.oakland.edu:/pub/misc/unix/...
oak.oakland.edu:/pub/misc/vaxvms/...
oak.oakland.edu:/pub/msdos/zip/...
oak.oakland.edu:/pub/msdos/windows3/...
wuarchive.wustl.edu:/mirrors/misc/unix/...
wuarchive.wustl.edu:/mirrors/misc/vaxvms/...
wuarchive.wustl.edu:/mirrors/msdos/zip/...
wuarchive.wustl.edu:/mirrors/msdos/windows3/...
wuarchive.wustl.edu:/packages/compression/...
ftp-os2.cdrom.com:/pub/os2/{2_x,all}/archiver/...
ftp-os2.nmsu.edu:/os2/{2_x,all}/archiver/...
ftp.informatik.tu-muenchen.de:/pub/comp/os/os2/archiver/...
wuarchive.wustl.edu:/mirrors/msdos/zip/pkz204g.exe
sumex-aim.stanford.edu:/info-mac/util/mac-unzip-51.hqx
ftp sites for the encryption and decryption sources and/or executables:
NOTE 1: Non-US users, please do NOT ftp from the US sites (US
regulations and all that). Likewise, US users, please do not
ftp from the European sites (it's not illegal, but it sure is
a waste of expensive bandwidth).
NOTE 2: Some sites may carry both encryption and non-encryption
executables with slightly different names; for example, zip201c2.zip
instead of zip201x2.zip ("c" == crypt version). Other sites may
include *only* the encryption-related executables (zip and zipcloak)
in a second archive (e.g., zcryp20x.zip).
From the US:
wuarchive.wustl.edu:/mirrors/garbo.uwasa.fi/arcutil/zcrypt21.zip
ftp.uu.net:/pub/archiving/zip/zcrypt21.zip
Outside the US:
garbo.uwasa.fi:/pc/arcutil/zcrypt21.zip
ftp.inria.fr:/system/arch-compr/zcrypt21.zip
ftp.informatik.tu-muenchen.de:/pub/comp/os/os2/archiver/zcrypt21.zip
(mail server at ftp-mailer@informatik.tu-muenchen.de)
ftp.win.tue.nl:/pub/compression/zip/...
ftp.uni-erlangen.de:/pub/pc/msdos/utilities/zip/...
ftp sites for VMS-format Zip/UnZip package (sources and executables, no
encryption/decryption--see also "Mail servers" section below):
ftp.uu.net:/pub/archiving/zip/VMS/*
The ZIP-UNZIP package for VMS is available via anonymous ftp from
ftp.spc.edu [192.107.46.27]; the following files are needed:
[.MACRO32]AAAREADME.TXT
[.MACRO32]LZDCMP.EXE
[.MACRO32.SAVESETS]ZIP-UNZIP.BCK_Z
VMS sources and object files are also available from vmsnet.sources
archives (e.g., black.cerritos.edu:[.mailserv.zip_unzip]*.*).
To find other ftp sites:
The "archie" ftp database utility can be used to find an ftp site
near you. If you don't know how to use it, DON'T ASK US--check the
Usenet groups news.newusers.questions or news.answers or some such,
or ask your system administrator (or just RTFM :-) ).
UUCP sites:
uunet!~/pub/archiving/zip/ ...
Bulletin boards (commercial and otherwise):
Sources, MS-DOS executables:
CompuServe IBMPRO forum, Library 10, Data Compression (unz51.zip,
sources; unz51.exe, self-extracting executables and docs)
CompuServe (ZiffNet) PBSUTIL forum and Public Brand Software BBS
[US, membership required; V.32 line, (317) 856-1490]
(unz51.zip, sources; unz51.exe, self-extracting exes and docs)
Drealm Conference System [London, UK; V.22bis, subscriber lines
to V.32bis, etc.; (+44) 81 568 2204]
Compulink Information eXchange (CIX) [UK ... details?]
Windows sources and executables:
CompuServe ZENITH forum (wunzip.zip, WizUnZip exe + libs for
Win 3.x, NT, OS/2 2.x)
CompuServe CRAFTS forum (wunz20.exe, WizUnZip bare executable
for Win 3.1, NT, OS/2 2.1)
OS/2 executables:
CompuServe OS2USER forum (zip201.zip and unz51.exe, OS/2 16-
and 32-bit exes and docs)
Amiga executables:
BIX in AMIGA files section (perform keyword search on "info-zip")
[requires account; telnet bix.com, or "C BIX" via local Sprint
X.25 PAD, or dial direct in US at (617) 491-5410]
Atari executables:
Gilligan's Island [V.32, 24 hours/day, etc.; (519) 895-1294]
GEnie in Atari ST RoundTable
Mail servers:
If you don't have anonymous FTP capability, you can mail one
of the following commands (in the body of an e-mail message) to
listserv@vm.ecs.rpi.edu or listserv@vm1.nodak.edu in order to
get a copy via e-mail:
/pdget mail /pub/misc/unix/unzip51.tar.Z uuencode
/pdget mail /pub/misc/unix/zip201.zip uuencode
The older, pseudo-TOPS-20 style also works:
/pdget mail pd:<misc.unix>unzip51.tar.Z uuencode
/pdget mail pd:<misc.unix>zip201.zip uuencode
[NOTE: As of 28 Jan 94, the NoDak server still had a minor bug in
its code which prevented it from finding files with more than one
dot in their names. The RPI server had just fixed this bug, and in
all likelihood the NoDak server will be fixed before you read this.]
To get the encryption source by e-mail, send the following commands
to ftp-mailer@informatik.tu-muenchen.de:
get /pub/utils/archiver/zcrypt21.zip
quit
To get the VMS Zip/UnZip package by e-mail, send the following
commands in the body of a mail message to mxserver@wkuvx1.wku.edu
(the "HELP" command is also accepted):
SEND ZIP-UNZIP
SEND FILESERV_TOOLS
__________________________________________________________________________
ZIPINFO(1L) LOCAL USER COMMANDS ZIPINFO(1L)
NAME
zipinfo - list detailed information about a ZIP archive
SYNOPSIS
zipinfo [-12smlvhtz] file[.zip] [file(s) ...]
[-x xfile(s) ...]
unzip -Z [-12smlvhtz] file[.zip] [file(s) ...]
[-x xfile(s) ...]
DESCRIPTION
zipinfo lists technical information about files in a ZIP
archive, most commonly found on MS-DOS systems. Such infor-
mation includes file access permissions, encryption status,
type of compression, version and operating system or file
system of compressing program, and the like. The default
behavior (with no options) is to list single-line entries
for each file in the archive, with header and trailer lines
providing summary information for the entire archive. The
format is a cross between Unix ``ls -l'' and ``unzip -v''
output. See DETAILED DESCRIPTION below. Note that zipinfo
is the same program as unzip (under Unix, a link to it); on
some systems, zipinfo support may not have been compiled in.
ARGUMENTS
file[.zip]
Path of the ZIP archive(s). If the file specification
is a wildcard, each matching file is processed in an
order determined by the operating system (or file sys-
tem). Only the filename can be a wildcard; the path
itself cannot. Wildcard expressions are similar to
Unix egrep(1) (regular) expressions and may contain:
* matches a sequence of 0 or more characters
? matches exactly 1 character
[...]
matches any single character found inside the
brackets; ranges are specified by a beginning
character, a hyphen, and an ending character. If
an exclamation point or a caret (`!' or `^') fol-
lows the left bracket, then the range of charac-
ters within the brackets is complemented (that is,
anything except the characters inside the brackets
is considered a match).
(Be sure to quote any character which might otherwise
be interpreted or modified by the operating system,
particularly under Unix and VMS.) If no matches are
found, the specification is assumed to be a literal
filename; and if that also fails, the suffix .zip is
appended. Note that self-extracting ZIP files are sup-
ported; just specify the .exe suffix (if any) expli-
citly.
[file(s)]
An optional list of archive members to be processed.
Regular expressions (wildcards) may be used to match
multiple members; see above. Again, be sure to quote
expressions that would otherwise be expanded or modi-
fied by the operating system.
[-x xfile(s)]
An optional list of archive members to be excluded from
processing.
OPTIONS
-1 list filenames only, one per line. This option
excludes all others; headers, trailers and zipfile com-
ments are never printed. It is intended for use in
Unix shell scripts.
-2 list filenames only, one per line, but allow headers
(-h), trailers (-t) and zipfile comments (-z), as well.
This option may be useful in cases where the stored
filenames are particularly long.
-s list zipfile info in short Unix ``ls -l'' format. This
is the default behavior; see below.
-m list zipfile info in medium Unix ``ls -l'' format.
Identical to the -s output, except that the compression
factor, expressed as a percentage, is also listed.
-l list zipfile info in long Unix ``ls -l'' format. As
with -m except that the compressed size (in bytes) is
printed instead of the compression ratio.
-v list zipfile information in verbose, multi-page format.
-h list header line. The archive name, actual size (in
bytes) and total number of files is printed.
-t list totals for files listed or for all files. The
number of files listed, their uncompressed and
compressed total sizes, and their overall compression
factor is printed; or, if only the totals line is being
printed, the values for the entire archive are given.
Note that the total compressed (data) size will never
match the actual zipfile size, since the latter
includes all of the internal zipfile headers in addi-
tion to the compressed data.
DETAILED DESCRIPTION
zipinfo has a number of modes, and its behavior can be
rather difficult to fathom if one isn't familiar with Unix
ls(1) (or even if one is). The default behavior is to list
files in the following format:
-rw-rws--- 1.9 unx 2802 t- defX 11-Aug-91 13:48 perms.2660
The last three fields are the modification date and time of
the file, and its name. The case of the filename is
respected; thus files which come from MS-DOS PKZIP are
always capitalized. If the file was zipped with a stored
directory name, that is also displayed as part of the
filename.
The second and third fields indicate that the file was
zipped under Unix with version 1.9 of zip. Since it comes
from Unix, the file permissions at the beginning of the line
are printed in Unix format. The uncompressed file-size
(2802 in this example) is the fourth field.
The fifth field consists of two characters, either of which
may take on several values. The first character may be
either `t' or `b', indicating that zip believes the file to
be text or binary, respectively; but if the file is
encrypted, zipinfo notes this fact by capitalizing the char-
acter (`T' or `B'). The second character may also take on
four values, depending on whether there is an extended local
header and/or an ``extra field'' associated with the file
(explained in PKWare's APPNOTE.TXT). If neither exists, the
character will be a hyphen (`-'); if there is an extended
local header but no extra field, `l'; if the reverse, `x';
and if both exist, `X'. Thus the file in this example is
(probably) a text file, is not encrypted, and has neither an
extra field nor an extended local header associated with it.
The example below, on the other hand, is an encrypted binary
file with an extra field:
RWD,R,R 0.9 vms 168 Bx shrk 9-Aug-91 19:15 perms.0644
Extra fields are used by PKWARE for authenticity verifica-
tion and possibly other purposes, and by Info-ZIP's zip 1.6
and later to store OS/2, Macintosh and VMS file attributes.
This example presumably falls into the latter class, then.
Note that the file attributes are listed in VMS format.
Some other possibilities for the host operating system
(which is actually a misnomer; host file system is more
correct) include OS/2 or NT with High Performance File Sys-
tem (HPFS), MS-DOS, OS/2 or NT with File Allocation Table
(FAT) file system, and Macintosh. These are denoted as fol-
lows:
-rw-a-- 1.0 hpf 5358 Tl i4:3 4-Dec-91 11:33 longfilename.hpfs
-r--ahs 1.1 fat 4096 b- i4:2 14-Jul-91 12:58 EA DATA. SF
--w------- 1.0 mac 17357 bx i8:2 4-May-92 04:02 unzip.macr
File attributes in the first two cases are indicated in a
Unix-like format, where the seven subfields indicate whether
the file: (1) is a directory, (2) is readable (always
true), (3) is writable, (4) is executable (guessed on the
basis of the extension--.exe, .com, .bat, .cmd and .btm
files are assumed to be so), (5) has its archive bit set,
(6) is hidden, and (7) is a system file. Interpretation of
Macintosh file attributes is unreliable because some Macin-
tosh archivers don't store any attributes in the archive.
Finally, the sixth field indicates the compression method
and possible sub-method used. There are six methods known
at present: storing (no compression), reducing, shrinking,
imploding, tokenizing (never publicly released), and deflat-
ing. In addition, there are four levels of reducing (1
through 4); four types of imploding (4K or 8K sliding dic-
tionary, and 2 or 3 Shannon-Fano trees); and four levels of
deflating (superfast, fast, normal, maximum compression).
zipinfo represents these methods and their sub-methods as
follows: stor; re:1, re:2, etc.; shrk; i4:2, i8:3, etc.;
tokn; and defS, defF, defN, and defX.
The medium and long listings are almost identical to the
short format except that they add information on the file's
compression. The medium format lists the file's compression
factor as a percentage indicating the amount of space which
has been ``removed'':
-rw-rws--- 1.5 unx 2802 t- 81% defX 11-Aug-91 13:48 perms.2660
In this example, the file has been compressed by more than a
factor of five; the compressed data are only 19% of the ori-
ginal size. The long format gives the compressed file's
size in bytes, instead:
-rw-rws--- 1.5 unx 2802 t- 538 defX 11-Aug-91 13:48 perms.2660
In addition to individual file information, a default zip-
file listing also includes header and trailer lines:
Archive: OS2.zip 5453 bytes 5 files
,,rw, 1.0 hpf 730 b- i4:3 26-Jun-92 23:40 Contents
,,rw, 1.0 hpf 3710 b- i4:3 26-Jun-92 23:33 makefile.os2
,,rw, 1.0 hpf 8753 b- i8:3 26-Jun-92 15:29 os2unzip.c
,,rw, 1.0 hpf 98 b- stor 21-Aug-91 15:34 unzip.def
,,rw, 1.0 hpf 95 b- stor 21-Aug-91 17:51 zipinfo.def
5 files, 13386 bytes uncompressed, 4951 bytes compressed: 63.0%
The header line gives the name of the archive, its total
size, and the total number of files; the trailer gives the
number of files listed, their total uncompressed size, and
their total compressed size (not including any of zip's
internal overhead). If, however, one or more file(s) are
provided, the header and trailer lines are not listed. This
behavior is also similar to that of Unix's ``ls -l''; it may
be overridden by specifying the -h and -t options expli-
citly. In such a case the listing format must also be
specified explicitly, since -h or -t (or both) in the
absence of other options implies that ONLY the header or
trailer line (or both) is listed. See the EXAMPLES section
below for a semi-intelligible translation of this nonsense.
The verbose listing is self-explanatory. It also lists file
comments and the zipfile comment, if any, and the number of
bytes of OS/2 extended attributes stored. Note that the
latter number will in general NOT match the number given by
OS/2's ``dir'' command; OS/2 always reports the number of
bytes required in 16-bit format, whereas zipinfo always
reports the 32-bit storage.
ENVIRONMENT OPTIONS
Modifying zipinfo's default behavior via options placed in
an environment variable can be a bit complicated to explain,
due to zipinfo's attempts to handle various defaults in an
intuitive, yet Unix-like, manner. (Try not to laugh.)
Nevertheless, there is some underlying logic. In brief,
there are three ``priority levels'' of options: the default
options; environment options, which can override or add to
the defaults; and explicit options given by the user, which
can override or add to either of the above.
The default listing format, as noted above, corresponds
roughly to the "zipinfo -hst" command (except when indivi-
dual zipfile members are specified). A user who prefers the
long-listing format (-l) can make use of the zipinfo's
environment variable to change this default:
ZIPINFO=-l; export ZIPINFO Unix Bourne shell
setenv ZIPINFO -l Unix C shell
set ZIPINFO=-l OS/2 or MS-DOS
define ZIPINFO_OPTS "-l" VMS (quotes for lowercase)
If, in addition, the user dislikes the trailer line,
zipinfo's concept of ``negative options'' may be used to
override the default inclusion of the line. This is accom-
plished by preceding the undesired option with one or more
minuses: e.g., ``-l-t'' or ``--tl'', in this example. The
first hyphen is the regular switch character, but the one
before the `t' is a minus sign. The dual use of hyphens may
seem a little awkward, but it's reasonably intuitive
nonetheless: simply ignore the first hyphen and go from
there. It is also consistent with the behavior of the Unix
command nice(1).
EXAMPLES
To get a basic, short-format listing of the complete con-
tents of a ZIP archive storage.zip, with both header and
totals lines, use only the archive name as an argument to
zipinfo:
zipinfo storage
To produce a basic, long-format listing (not verbose),
including header and totals lines, use -l:
zipinfo -l storage
To list the complete contents of the archive without header
and totals lines, either negate the -h and -t options or
else specify the contents explicitly:
zipinfo --h-t storage
zipinfo storage \*
(where the backslash is required only if the shell would
otherwise expand the `*' wildcard, as in Unix when globbing
is turned on--double quotes around the asterisk would have
worked as well). To turn off the totals line by default,
use the environment variable (C shell is assumed here):
setenv ZIPINFO --t
zipinfo storage
To get the full, short-format listing of the first example
again, given that the environment variable is set as in the
previous example, it is necessary to specify the -s option
explicitly, since the -t option by itself implies that ONLY
the footer line is to be printed:
setenv ZIPINFO --t
zipinfo -t storage [only totals line]
zipinfo -st storage [full listing]
The -s option, like -m and -l, includes headers and footers
by default, unless otherwise specified. Since the environ-
ment variable specified no footers and that has a higher
precedence than the default behavior of -s, an explicit -t
option was necessary to produce the full listing. Nothing
was indicated about the header, however, so the -s option
was sufficient. Note that both the -h and -t options, when
used by themselves or with each other, override any default
listing of member files; only the header and/or footer are
printed. This behavior is useful when zipinfo is used with
a wildcard zipfile specification; the contents of all zip-
files are then summarized with a single command.
To list information on a single file within the archive, in
medium format, specify the filename explicitly:
zipinfo -m storage unshrink.c
The specification of any member file, as in this example,
will override the default header and totals lines; only the
single line of information about the requested file will be
printed. This is intuitively what one would expect when
requesting information about a single file. For multiple
files, it is often useful to know the total compressed and
uncompressed size; in such cases -t may be specified expli-
citly:
zipinfo -mt storage "*.[ch]" Mak\*
Finally, to get maximal information about the ZIP archive,
use the verbose option. It is usually wise to pipe the out-
put into a filter such as more(1):
zipinfo -v storage | more
TIPS
The author finds it convenient to define an alias ii for
zipinfo on systems which allow aliases (or, on other sys-
tems, copy/rename the executable, create a link or create a
command file with the name ii). The ii usage parallels the
common ll alias for long listings in Unix, and the similar-
ity between the outputs of the two commands was intentional.
BUGS
None known at this time, but we're always delighted to find
a good one.
SEE ALSO
ls(1), funzip(1), unzip(1), zip(1), zipcloak(1), zipnote(1),
zipsplit(1)
AUTHOR
Greg Roelofs (a.k.a. Cave Newt). ZipInfo contains pattern-
matching code by Mark Adler, and the OS/2 extra-field code
is by Kai Uwe Rommel; many other have contributed fixes and
improvements. Please refer to the CONTRIBS file in the
UnZip source distribution for a more complete list.
Info-ZIP Last change: 7 Feb 94 v2.0
__________________________________________________________________________
UNZIP(1L) LOCAL USER COMMANDS UNZIP(1L)
NAME
unzip - list, test and extract compressed files in a ZIP
archive
SYNOPSIS
unzip [-Z] [-cflptuvz[ajnoqsUV$]] file[.zip] [file(s) ...]
[-x xfile(s) ...] [-d exdir]
DESCRIPTION
unzip will list, test, or extract files from a ZIP archive,
commonly found on MS-DOS systems. The default behavior
(with no options) is to extract into the current directory
(and subdirectories below it) all files from the specified
ZIP archive. A companion program, zip(1L), creates ZIP
archives; both programs are compatible with PKWARE's PKZIP
and PKUNZIP for MS-DOS.
ARGUMENTS
file[.zip]
Path of the ZIP archive(s). If the file specification
is a wildcard, each matching file is processed in an
order determined by the operating system (or file sys-
tem). Only the filename can be a wildcard; the path
itself cannot. Wildcard expressions are similar to
Unix egrep(1) (regular) expressions and may contain:
* matches a sequence of 0 or more characters
? matches exactly 1 character
[...]
matches any single character found inside the
brackets; ranges are specified by a beginning
character, a hyphen, and an ending character. If
an exclamation point or a caret (`!' or `^') fol-
lows the left bracket, then the range of charac-
ters within the brackets is complemented (that is,
anything except the characters inside the brackets
is considered a match).
(Be sure to quote any character which might otherwise
be interpreted or modified by the operating system,
particularly under Unix and VMS.) If no matches are
found, the specification is assumed to be a literal
filename; and if that also fails, the suffix .zip is
appended. Note that self-extracting ZIP files are sup-
ported; just specify the .exe suffix (if any) expli-
citly.
[file(s)]
An optional list of archive members to be processed.
Regular expressions (wildcards) may be used to match
multiple members; see above. Again, be sure to quote
expressions that would otherwise be expanded or modi-
fied by the operating system.
[-x xfile(s)]
An optional list of archive members to be excluded from
processing. Since wildcard characters match directory
separators (`/'), this option may be used to exclude
any files which are in subdirectories. For example,
``unzip foo *.[ch] -x */*'' would extract all C source
files in the main directory, but none in any subdirec-
tories. Without the -x option, all C source files in
all directories within the zipfile would be extracted.
[-d exdir]
An optional directory to which to extract files. By
default, all files and subdirectories are recreated in
the current directory; the -d option allows extraction
in an arbitrary directory (always assuming one has per-
mission to write to the directory). This option need
not appear at the end of the command line; it is also
accepted immediately after the zipfile specification,
or between the file(s) and the -x option.
OPTIONS
-Z zipinfo(1) mode. If the first option on the command
line is -Z, the remaining options are taken to be
zipinfo(1) options. See the appropriate manual page
for a description of these options.
-c extract files to stdout/screen (``CRT''). This option
is similar to the -p option except that the name of
each file is printed as it is extracted, the -a option
is allowed, and ASCII-EBCDIC conversion is automati-
cally performed if appropriate.
-f freshen existing files, i.e., extract only those files
which already exist on disk and which are newer than
the disk copies. By default unzip queries before
overwriting, but the -o option may be used to suppress
the queries.
-l list archive files (short format). The name,
uncompressed file size and modification date and time
of each specified file is printed, along with totals
for all files specified. If a file was archived from a
single-case file system (for example, the MS-DOS FAT
file system) and the -U option was not given, the
filename is converted to lowercase and is prefixed with
a caret (^). In addition, the archive comment and
individual file comments (if any) are displayed.
-p extract files to pipe (stdout). Nothing but the file
data is sent to stdout, and the files are always
extracted in binary format, just as they are stored (no
conversions).
-t test archive files. This option extracts each speci-
fied file in memory and compares the CRC (cyclic redun-
dancy check, an enhanced checksum) of the expanded file
with the original file's stored CRC value.
-u update existing files and create new ones if needed.
This option performs the same function as the -f
option, extracting (with query) files which are newer
than those with the same name on disk, and in addition
it extracts those files which do not already exist on
disk.
-v list archive files (verbose format). In addition to
the information given by the -l option, the compression
method, compressed size, compression ratio and 32-bit
CRC is listed.
-z display only the archive comment.
MODIFIERS
-a convert text files. Ordinarily all files are extracted
exactly as they are stored (as ``binary'' files). The
-a option causes files identified by zip as text files
(those with the `t' label in zipinfo listings, rather
than `b') to be automatically extracted as such, con-
verting line endings, end-of-file characters and the
character set itself as necessary. (For example, Unix
files use line feeds (LFs) for end-of-line (EOL) and
have no end-of-file (EOF) marker; Macintoshes use car-
riage returns (CRs) for EOLs; and most PC operating
systems use CR+LF for EOLs and control-Z for EOF. In
addition, IBM mainframes and the Michigan Terminal Sys-
tem use EBCDIC rather than the more common ASCII char-
acter set, and NT supports Unicode.) Note that zip's
identification of text files is by no means perfect;
some ``text'' files may actually be binary and vice
versa. unzip therefore prints ``[text]'' or
``[binary]'' as a visual check for each file it
extracts when using the -a option. The -aa option
forces all files to be extracted as text, regardless of
the supposed file type.
-j junk paths. The archive's directory structure is not
recreated; all files are deposited in the extraction
directory (by default, the current one).
-n never overwrite existing files. If a file already
exists, skip the extraction of that file without
prompting. By default unzip queries before extracting
any file which already exists; the user may choose to
overwrite only the current file, overwrite all files,
skip extraction of the current file, skip extraction of
all existing files, or rename the current file.
-o overwrite existing files without prompting. This is a
dangerous option, so use it with care. (It is often
used with -f, however.)
-q perform operations quietly (-qq = even quieter). Ordi-
narily unzip prints the names of the files it's
extracting or testing, the extraction methods, any file
or zipfile comments which may be stored in the archive,
and possibly a summary when finished with each archive.
The -q[q] options suppress the printing of some or all
of these messages.
-s [OS/2, NT, MS-DOS] convert spaces in filenames to
underscores. Since all PC operating systems allow
spaces in filenames, unzip by default extracts
filenames with spaces intact (e.g., ``EA DATA. SF'').
This can be awkward, however, since MS-DOS in particu-
lar does not gracefully support spaces in filenames.
Conversion of spaces to underscores can eliminate the
awkwardness in some cases.
-U leave filenames uppercase if created under MS-DOS, VMS,
etc. Depending on the archiver, files archived under
single-case filesystems may be stored as all-uppercase
names; this can be awkward when extracting to a case-
preserving filesystem such as OS/2 HPFS or a case-
sensitive one such as under Unix. By default unzip
converts such filenames to lowercase; this option
causes all filenames to be extracted exactly as they're
stored (excepting truncation, conversion of unsupported
characters, etc.).
-V retain (VMS) file version numbers. VMS files can be
stored with a version number, in the format
file.ext;##. By default the ``;##'' version numbers
are stripped, but this option allows them to be
retained. (On filesystems which limit filenames to
particularly short lengths, the version numbers may be
truncated or stripped regardless of this option.)
-X [VMS] restore owner/protection info (may require system
privileges). Ordinary file attributes are always
restored, but this option allows UICs to be restored as
well. [The next version of unzip will support Unix
UID/GID info as well, and possibly NT permissions.]
-$ [MS-DOS, OS/2, NT, Amiga] restore the volume label if
the extraction medium is removable (e.g., a diskette).
Doubling the option (-$$) allows fixed media (hard
disks) to be labelled as well. By default, volume
labels are ignored.
ENVIRONMENT OPTIONS
unzip's default behavior may be modified via options placed
in an environment variable. This can be done with any
option, but it is probably most useful with the -q, -a, -o,
or -n modifiers: make unzip quieter by default, make it
auto-convert text files, or make it always overwrite or
never overwrite files as it extracts them. For example, to
make unzip act as quietly as possible, only reporting
errors, one would use one of the following commands:
UNZIP=-qq; export UNZIP Unix Bourne shell
setenv UNZIP -qq Unix C shell
set UNZIP=-qq OS/2 or MS-DOS
define UNZIP_OPTS "-qq" VMS (quotes for lowercase)
Environment options are, in effect, considered to be just
like any other command-line options, except that they are
effectively the first options on the command line. To over-
ride an environment option, one may use the ``minus opera-
tor'' to remove it. For instance, to override one of the
quiet-flags in the example above, use the command
unzip --q[other options] zipfile
The first hyphen is the normal switch character, and the
second is a minus sign, acting on the q option. Thus the
effect here is to cancel one quantum of quietness. To can-
cel both quiet flags, two (or more) minuses may be used:
unzip -t--q zipfile
unzip ---qt zipfile
(the two are equivalent). This may seem awkward or confus-
ing, but it is reasonably intuitive: just ignore the first
hyphen and go from there. It is also consistent with the
behavior of Unix nice(1).
EXAMPLES
To use unzip to extract all members of the archive
letters.zip into the current directory and subdirectories
below it, creating any subdirectories as necessary:
unzip letters
To extract all members of letters.zip into the current
directory only:
unzip -j letters
To test letters.zip, printing only a summary message indi-
cating whether the archive is OK or not:
unzip -tq letters
To extract to standard output all members of letters.zip
whose names end in .tex, auto-converting to the local end-
of-line convention and piping the output into more(1):
unzip -ca letters \*.tex | more
(The backslash before the asterisk is only required if the
shell expands wildcards, as in Unix; double quotes could
have been used instead, as in the source example below.) To
extract the binary file paper1.dvi to standard output and
pipe it to a printing program:
unzip -p articles paper1.dvi | dvips
To extract all FORTRAN and C source files--*.f, *.c, *.h,
and Makefile--into the /tmp directory:
unzip source.zip "*.[fch]" Makefile -d /tmp
(the double quotes are necessary only in Unix and only if
globbing is turned on). To extract only newer versions of
the files already in the current directory, without querying
(NOTE: be careful of unzipping in one timezone a zipfile
created in another--ZIP archives to date contain no timezone
information, and a ``newer'' file from an eastern timezone
may, in fact, be older):
unzip -fo sources
To extract newer versions of the files already in the
current directory and to create any files not already there
(same caveat as previous example):
unzip -uo sources
In the last five examples, assume that UNZIP or UNZIP_OPTS
is set to -q. To do a singly quiet listing:
unzip -l file
To do a doubly quiet listing:
unzip -ql file
To do a standard listing:
unzip --ql file
or
unzip -l-q file
or
unzip -l--q file (extra minuses don't hurt)
TIPS
The current maintainer, being a lazy sort, finds it very
useful to define a pair of aliases: tt for ``unzip -tq''
and ii for ``unzip -Z'' (or ``zipinfo''). One may then sim-
ply type ``tt zipfile'' to test an archive, something which
is worth making a habit of doing. With luck unzip will
report ``No errors detected in zipfile.zip,'' after which
one may breathe a sigh of relief.
BUGS
[MS-DOS] When extracting or testing files from an archive on
a defective floppy diskette, if the ``Fail'' option is
chosen from DOS's ``Abort, Retry, Fail?'' message, unzip may
hang the system, requiring a reboot. Instead, press
control-C (or control-Break) to terminate unzip.
Under DEC Ultrix, unzip will sometimes fail on long zipfiles
(bad CRC, not always reproducible). This is apparently due
either to a hardware bug (cache memory) or an operating sys-
tem bug (improper handling of page faults?).
Dates and times of stored directories are not restored.
[OS/2] Extended attributes for existing directories are
never updated. This is a limitation of the operating sys-
tem; unzip has no way to determine whether the stored attri-
butes are newer or older than the existing ones.
[VMS] When extracting to another directory, only the [.foo]
syntax is accepted for the -d option; the simple Unix foo
syntax is silently ignored (as is the less common VMS
foo.dir syntax).
[VMS] When the file being extracted already exists, unzip's
query only allows skipping, overwriting or renaming; there
should additionally be a choice for creating a new version
of the file. In fact, the ``overwrite'' choice does create
a new version; the old version is not overwritten or
deleted.
SEE ALSO
funzip(1L), zip(1L), zipcloak(1L), zipgrep(1L), zipinfo(1L),
zipnote(1L), zipsplit(1L)
AUTHORS
The primary Info-ZIP authors (current zip-bugs workgroup)
are: Jean-loup Gailly (Zip), Greg R. Roelofs (UnZip), Mark
Adler (decompression, fUnZip), Kai Uwe Rommel (OS/2), Igor
Mandrichenko (VMS), John Bush and Paul Kienitz (Amiga),
Antoine Verheijen (Macintosh), Chris Herborth (Atari), Henry
Gessau (NT), and Robert Heath (Windows). The author of the
original unzip code upon which Info-ZIP's is based was
Samuel H. Smith; Carl Mascott did the first Unix port; and
David P. Kirschbaum organized and led Info-ZIP in its early
days. The full list of contributors to UnZip has grown
quite large; please refer to the CONTRIBS file in the UnZip
source distribution for a more complete list.
VERSIONS
v1.2 15 Mar 89 Samuel H. Smith
v2.0 9 Sep 89 Samuel H. Smith
v2.x fall 1989 many Usenet contributors
v3.0 1 May 90 Info-ZIP (DPK, consolidator)
v3.1 15 Aug 90 Info-ZIP (DPK, consolidator)
v4.0 1 Dec 90 Info-ZIP (GRR, maintainer)
v4.1 12 May 91 Info-ZIP
v4.2 20 Mar 92 Info-ZIP (zip-bugs subgroup; GRR, maint.)
v5.0 21 Aug 92 Info-ZIP (zip-bugs subgroup; GRR, maint.)
v5.1 7 Feb 94 Info-ZIP (zip-bugs subgroup; GRR, maint.)
Info-ZIP Last change: 7 Feb 94 v5.1
__________________________________________________________________________
FUNZIP(1) USER COMMANDS FUNZIP(1)
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).
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 condi-
tion 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 exiting. 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 will reset the terminal prop-
erly.
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 sim-
ply creates the directory and exits.
The functionality of funzip should be incorporated into
unzip itself (future release).
SEE ALSO
unzip(1), zip(1), zipcloak(1), zipinfo(1), zipnote(1),
zipsplit(1)
AUTHOR
Mark Adler (Info-ZIP)
Info-ZIP Last change: 7 Feb 94 v3.8
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