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1996-04-29
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ZIPINFO(1L) MISC. REFERENCE MANUAL PAGES ZIPINFO(1L)
NAME
zipinfo - list detailed information about a ZIP archive
SYNOPSIS
zipinfo [-12smlvhMtTz] file[.zip] [file(s) ...]
[-x xfile(s) ...]
unzip -Z [-12smlvhMtTz] 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, however, zipinfo support may have been omitted
when unzip was compiled.
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 that might otherwise be
interpreted or modified by the operating system, par-
ticularly under Unix and VMS.) If no matches are
found, the specification is assumed to be a literal
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ZIPINFO(1L) MISC. REFERENCE MANUAL PAGES ZIPINFO(1L)
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.
-M pipe all output through an internal pager similar to
the Unixmore(1) command. At the end of a screenful of
output, zipinfo pauses with a ``--More--'' prompt; the
next screenful may be viewed by pressing the Enter
(Return) key or the space bar. zipinfo can be ter-
minated by pressing the ``q'' key and, on some systems,
the Enter/Return key. Unlike Unix more(1), there is no
forward-searching or editing capability. Also, zipinfo
doesn't notice if long lines wrap at the edge of the
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ZIPINFO(1L) MISC. REFERENCE MANUAL PAGES ZIPINFO(1L)
screen, effectively resulting in the printing of two or
more lines and the likelihood that some text will
scroll off the top of the screen before being viewed.
On some systems the number of available lines on the
screen is not detected, in which case zipinfo assumes
the height is 24 lines.
-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.
-T print the file dates and times in a sortable decimal
format (yymmdd.hhmmss). The default date format is a
more standard, human-readable version with abbreviated
month names (see examples below).
-z include the archive comment (if any) in the listing.
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 that 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
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ZIPINFO(1L) MISC. REFERENCE MANUAL PAGES ZIPINFO(1L)
(fully explained in PKWare's APPNOTE.TXT, but basically
analogous to pragmas in ANSI C--i.e., they provide a stan-
dard way to include non-standard information in the