518 lines
23 KiB
Groff
518 lines
23 KiB
Groff
.\" Copyright (c) 1990-2009 Info-ZIP. All rights reserved.
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.\"
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.\" See the accompanying file LICENSE, version 2009-Jan-02 or later
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.\" (the contents of which are also included in unzip.h) for terms of use.
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.\" If, for some reason, all these files are missing, the Info-ZIP license
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.\" also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
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.\"
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.\" zipinfo.1 by Greg Roelofs and others.
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.\"
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.\" =========================================================================
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.\" define .X macro (for long-line ZipInfo output examples; small Courier):
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.de X
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.nf
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.ft CW
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.ie n .ti -5
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.el \{ .ti +2m
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.ps -1 \}
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\&\\$1
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.ie n .ti +5
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.el \{ .ti -2m
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.ps +1 \}
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.ft
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.fi
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..
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.\" define .EX/.EE (for multiline user-command examples; normal Courier font)
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.de EX
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.in +4n
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.nf
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.ft CW
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..
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.de EE
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.ft
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.fi
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.in -4n
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..
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.\" =========================================================================
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.TH ZIPINFO 1L "20 April 2009 (v3.0)" "Info-ZIP"
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.SH NAME
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zipinfo \- list detailed information about a ZIP archive
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.PD
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.SH SYNOPSIS
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\fBzipinfo\fP [\fB\-12smlvhMtTz\fP] \fIfile\fP[\fI.zip\fP]
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[\fIfile(s)\fP\ .\|.\|.] [\fB\-x\fP\ \fIxfile(s)\fP\ .\|.\|.]
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.PP
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\fBunzip\fP \fB\-Z\fP [\fB\-12smlvhMtTz\fP] \fIfile\fP[\fI.zip\fP]
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[\fIfile(s)\fP\ .\|.\|.] [\fB\-x\fP\ \fIxfile(s)\fP\ .\|.\|.]
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.PD
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.\" =========================================================================
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.SH DESCRIPTION
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\fIzipinfo\fP lists technical information about files in a ZIP archive, most
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commonly found on MS-DOS systems. Such information includes file access
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permissions, encryption status, type of compression, version and operating
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system or file system of compressing program, and the like. The default
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behavior (with no options) is
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to list single-line entries for each file in the archive, with header and
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trailer lines providing summary information for the entire archive. The
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format is a cross between Unix ``\fCls \-l\fR'' and ``\fCunzip \-v\fR''
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output. See
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.B "DETAILED DESCRIPTION"
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below. Note that \fIzipinfo\fP is the same program as \fIunzip\fP (under
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Unix, a link to it); on some systems, however, \fIzipinfo\fP support may
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have been omitted when \fIunzip\fP was compiled.
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.PD
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.\" =========================================================================
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.SH ARGUMENTS
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.TP
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.IR file [ .zip ]
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Path of the ZIP archive(s). If the file specification is a wildcard,
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each matching file is processed in an order determined by the operating
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system (or file system). Only the filename can be a wildcard; the path
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itself cannot. Wildcard expressions are similar to Unix \fIegrep\fP(1)
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(regular) expressions and may contain:
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.RS
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.IP *
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matches a sequence of 0 or more characters
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.IP ?
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matches exactly 1 character
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.IP [.\|.\|.]
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matches any single character found inside the brackets; ranges are specified
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by a beginning character, a hyphen, and an ending character. If an exclamation
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point or a caret (`!' or `^') follows the left bracket, then the range of
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characters within the brackets is complemented (that is, anything \fIexcept\fP
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the characters inside the brackets is considered a match). To specify a
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verbatim left bracket, the three-character sequence ``[[]'' has to be used.
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.RE
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.IP
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(Be sure to quote any character that might otherwise be interpreted or
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modified by the operating system, particularly under Unix and VMS.) If no
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matches are found, the specification is assumed to be a literal filename;
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and if that also fails, the suffix \fC.zip\fR is appended. Note that
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self-extracting ZIP files are supported, as with any other ZIP archive;
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just specify the \fC.exe\fR suffix (if any) explicitly.
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.IP [\fIfile(s)\fP]
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An optional list of archive members to be processed, separated by spaces.
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(VMS versions compiled with VMSCLI defined must delimit files with commas
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instead.)
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Regular expressions (wildcards) may be used to match multiple members; see
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above. Again, be sure to quote expressions that would otherwise be expanded
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or modified by the operating system.
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.IP [\fB\-x\fP\ \fIxfile(s)\fP]
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An optional list of archive members to be excluded from processing.
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.\" =========================================================================
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.SH OPTIONS
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.TP
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.B \-1
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list filenames only, one per line. This option excludes all others; headers,
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trailers and zipfile comments are never printed. It is intended for use in
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Unix shell scripts.
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.TP
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.B \-2
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list filenames only, one per line, but allow headers (\fB\-h\fP), trailers
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(\fB\-t\fP) and zipfile comments (\fB\-z\fP), as well. This option may be
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useful in cases where the stored filenames are particularly long.
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.TP
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.B \-s
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list zipfile info in short Unix ``\fCls \-l\fR'' format. This is the default
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behavior; see below.
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.TP
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.B \-m
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list zipfile info in medium Unix ``\fCls \-l\fR'' format. Identical to the
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\fB\-s\fP output, except that the compression factor, expressed as a
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percentage, is also listed.
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.TP
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.B \-l
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list zipfile info in long Unix ``\fCls \-l\fR'' format. As with \fB\-m\fP
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except that the compressed size (in bytes) is printed instead of the
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compression ratio.
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.TP
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.B \-v
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list zipfile information in verbose, multi-page format.
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.TP
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.B \-h
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list header line. The archive name, actual size (in bytes) and total number
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of files is printed.
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.TP
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.B \-M
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pipe all output through an internal pager similar to the Unix \fImore\fP(1)
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command. At the end of a screenful of output, \fIzipinfo\fP pauses with a
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``\-\-More\-\-'' prompt; the next screenful may be viewed by pressing the
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Enter (Return) key or the space bar. \fIzipinfo\fP can be terminated by
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pressing the ``q'' key and, on some systems, the Enter/Return key. Unlike
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Unix \fImore\fP(1), there is no forward-searching or editing capability.
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Also, \fIzipinfo\fP doesn't notice if long lines wrap at the edge of the
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screen, effectively resulting in the printing of two or more lines and the
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likelihood that some text will scroll off the top of the screen before being
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viewed. On some systems the number of available lines on the screen is not
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detected, in which case \fIzipinfo\fP assumes the height is 24 lines.
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.TP
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.B \-t
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list totals for files listed or for all files. The number of files listed,
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their uncompressed and compressed total sizes , and their overall compression
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factor is printed; or, if only the totals line is being printed, the values
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for the entire archive are given. The compressed total size does not include
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the 12 additional header bytes of each encrypted entry. Note that the total
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compressed (data) size will never match the actual zipfile size, since the
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latter includes all of the internal zipfile headers in addition to the
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compressed data.
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.TP
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.B \-T
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print the file dates and times in a sortable decimal format (yymmdd.hhmmss).
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The default date format is a more standard, human-readable version with
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abbreviated month names (see examples below).
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.TP
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.B \-U
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[UNICODE_SUPPORT only] modify or disable UTF-8 handling.
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When UNICODE_SUPPORT is available, the option \fB\-U\fP forces \fIunzip\fP
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to escape all non-ASCII characters from UTF-8 coded filenames as ``#Uxxxx''.
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This option is mainly provided for debugging purpose when the fairly new
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UTF-8 support is suspected to mangle up extracted filenames.
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.IP
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The option \fB\-UU\fP allows to entirely disable the recognition of UTF-8
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encoded filenames. The handling of filename codings within \fIunzip\fP falls
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back to the behaviour of previous versions.
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.TP
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.B \-z
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include the archive comment (if any) in the listing.
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.PD
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.\" =========================================================================
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.SH "DETAILED DESCRIPTION"
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.I zipinfo
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has a number of modes, and its behavior can be rather difficult to fathom
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if one isn't familiar with Unix \fIls\fP(1) (or even if one is). The default
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behavior is to list files in the following format:
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.PP
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.X "-rw-rws--- 1.9 unx 2802 t- defX 11-Aug-91 13:48 perms.2660"
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.PP
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The last three fields are the modification date and time of
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the file, and its name. The case of the filename is respected; thus
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files that come from MS-DOS PKZIP are always capitalized. If the file
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was zipped with a stored directory name, that is also displayed as part
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of the filename.
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.PP
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The second and third fields indicate that the file was zipped under
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Unix with version 1.9 of \fIzip\fP. Since it comes from Unix, the file
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permissions at the beginning of the line are printed in Unix format.
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The uncompressed file-size (2802 in this example) is the fourth field.
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.PP
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The fifth field consists of two characters, either of which may take
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on several values. The first character may be either `t' or `b', indicating
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that \fIzip\fP believes the file to be text or binary, respectively;
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but if the file is encrypted, \fIzipinfo\fP
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notes this fact by capitalizing the character (`T' or `B'). The second
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character may also take on four values, depending on whether there is
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an extended local header and/or an ``extra field'' associated with the
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file (fully explained in PKWare's APPNOTE.TXT, but basically analogous to
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pragmas in ANSI C--i.e., they provide a standard way to include non-standard
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information in the archive). If neither exists, the character
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will be a hyphen (`\-'); if there is an extended local header but no extra
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field, `l'; if the reverse, `x'; and if both exist, `X'. Thus the
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file in this example is (probably) a text file, is not encrypted, and
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has neither an extra field nor an extended local header associated with it.
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The example below, on the other hand, is an encrypted binary file with an
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extra field:
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.PP
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.X "RWD,R,R 0.9 vms 168 Bx shrk 9-Aug-91 19:15 perms.0644"
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.PP
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Extra fields are used for various purposes (see discussion of the \fB\-v\fP
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option below) including the storage of VMS file attributes, which is
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presumably the case here. Note that the file attributes are listed in
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VMS format. Some other possibilities for the host operating system (which
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is actually a misnomer--host file system is more correct) include
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OS/2 or NT with High Performance File System (HPFS), MS-DOS, OS/2 or NT
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with File Allocation Table (FAT) file system, and Macintosh. These are
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denoted as follows:
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.PP
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.X "-rw-a-- 1.0 hpf 5358 Tl i4:3 4-Dec-91 11:33 longfilename.hpfs"
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.X "-r--ahs 1.1 fat 4096 b- i4:2 14-Jul-91 12:58 EA DATA. SF"
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.X "--w------- 1.0 mac 17357 bx i8:2 4-May-92 04:02 unzip.macr"
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.PP
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File attributes in the first two cases are indicated in a Unix-like format,
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where the seven subfields indicate whether the file: (1) is a directory,
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(2) is readable (always true), (3) is writable, (4) is executable (guessed
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on the basis of the extension--\fI.exe\fP, \fI.com\fP, \fI.bat\fP, \fI.cmd\fP
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and \fI.btm\fP files are assumed to be so), (5) has its archive bit set,
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(6) is hidden, and (7) is a system file. Interpretation of Macintosh file
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attributes is unreliable because some Macintosh archivers don't store any
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attributes in the archive.
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.PP
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Finally, the sixth field indicates
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the compression method and possible sub-method used. There are six methods
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known at present: storing (no compression), reducing, shrinking, imploding,
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tokenizing (never publicly released), and deflating. In addition, there are
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four levels of reducing (1 through 4); four types of imploding (4K or 8K
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sliding dictionary, and 2 or 3 Shannon-Fano trees); and four levels of
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deflating (superfast, fast, normal, maximum compression). \fIzipinfo\fP
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represents these methods and their sub-methods as follows: \fIstor\fP;
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\fIre:1\fP, \fIre:2\fP, etc.; \fIshrk\fP; \fIi4:2\fP, \fIi8:3\fP, etc.;
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\fItokn\fP; and \fIdefS\fP, \fIdefF\fP, \fIdefN\fP, and \fIdefX\fP.
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.PP
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The medium and long listings are almost identical to the short format except
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that they add information on the file's compression. The medium format lists
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the file's compression factor as a percentage indicating the amount of space
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that has been ``removed'':
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.PP
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.X "-rw-rws--- 1.5 unx 2802 t- 81% defX 11-Aug-91 13:48 perms.2660"
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.PP
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In this example, the file has been compressed by more than a factor of
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five; the compressed data are only 19% of the original size. The long
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format gives the compressed file's size in bytes, instead:
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.PP
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.X "-rw-rws--- 1.5 unx 2802 t- 538 defX 11-Aug-91 13:48 perms.2660"
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.PP
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In contrast to the \fIunzip\fP listings, the compressed size figures in
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this listing format denote the complete size of compressed data, including
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the 12 extra header bytes in case of encrypted entries.
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.PP
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Adding the \fB\-T\fP option changes the file date and time to decimal
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format:
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.PP
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.X "-rw-rws--- 1.5 unx 2802 t- 538 defX 910811.134804 perms.2660"
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.PP
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Note that because of limitations in the MS-DOS format used to store file
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times, the seconds field is always rounded to the nearest even second.
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For Unix files this is expected to change in the next major releases of
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\fIzip\fP(1L) and \fIunzip\fP.
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.PP
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In addition to individual file information, a default zipfile listing
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also includes header and trailer lines:
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.PP
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.X "Archive: OS2.zip 5453 bytes 5 files"
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.X ",,rw, 1.0 hpf 730 b- i4:3 26-Jun-92 23:40 Contents"
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.X ",,rw, 1.0 hpf 3710 b- i4:3 26-Jun-92 23:33 makefile.os2"
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.X ",,rw, 1.0 hpf 8753 b- i8:3 26-Jun-92 15:29 os2unzip.c"
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.X ",,rw, 1.0 hpf 98 b- stor 21-Aug-91 15:34 unzip.def"
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.X ",,rw, 1.0 hpf 95 b- stor 21-Aug-91 17:51 zipinfo.def"
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.X "5 files, 13386 bytes uncompressed, 4951 bytes compressed: 63.0%"
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.PP
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The header line gives the name of the archive, its total size, and the
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total number of files; the trailer gives the number of files listed,
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their total uncompressed size, and their total compressed size (not
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including any of \fIzip\fP's internal overhead). If, however, one or
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more \fIfile(s)\fP are provided, the header and trailer lines are
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not listed. This behavior is also similar to that of Unix's ``\fCls \-l\fR'';
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it may be overridden by specifying the \fB\-h\fP and \fB\-t\fP options
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explicitly.
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In such a case the listing format must also be specified explicitly,
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since \fB\-h\fP or \fB\-t\fP (or both) in the absence of other options implies
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that ONLY the header or trailer line (or both) is listed. See the
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\fBEXAMPLES\fP section below for a semi-intelligible translation of this
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nonsense.
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.PP
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The verbose listing is mostly self-explanatory. It also lists file
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comments and the zipfile comment, if any, and the type and number of bytes
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in any stored extra fields. Currently known types of extra fields include
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PKWARE's authentication (``AV'') info; OS/2 extended attributes; VMS
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filesystem info, both PKWARE and Info-ZIP versions; Macintosh resource
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forks; Acorn/Archimedes SparkFS info; and so on. (Note
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that in the case of OS/2 extended attributes--perhaps the most common
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use of zipfile extra fields--the size of the stored EAs as reported by
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\fIzipinfo\fP may not match the number given by OS/2's \fIdir\fP command:
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OS/2 always reports the number of bytes required in 16-bit format, whereas
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\fIzipinfo\fP always reports the 32-bit storage.)
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.PP
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Again, the compressed size figures of the individual entries include the
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12 extra header bytes for encrypted entries. In contrast, the archive total
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compressed size and the average compression ratio shown in the summary
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bottom line are calculated \fBwithout\fP the extra 12 header bytes of
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encrypted entries.
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.PD
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.\" =========================================================================
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.SH "ENVIRONMENT OPTIONS"
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Modifying \fIzipinfo\fP's default behavior via options placed in
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an environment variable can be a bit complicated to explain, due to
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\fIzipinfo\fP's attempts to handle various defaults in an intuitive,
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yet Unix-like, manner. (Try not to laugh.) Nevertheless, there is some
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underlying logic. In brief,
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there are three ``priority levels'' of options: the default options;
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environment options, which can override or add to the defaults; and
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explicit options given by the user, which can override or add to
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either of the above.
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.PP
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The default listing format, as noted above, corresponds roughly
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to the "\fCzipinfo \-hst\fR" command (except when individual zipfile members
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are specified).
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A user who prefers the long-listing format (\fB\-l\fP) can make use of the
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\fIzipinfo\fP's environment variable to change this default:
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.TP
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Unix Bourne shell:
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\f(CW\&ZIPINFO=\-l; export ZIPINFO\fP
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.TP
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Unix C shell:
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\f(CW\&setenv ZIPINFO \-l\fP
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.TP
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OS/2 or MS-DOS:
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\f(CW\&set ZIPINFO=\-l\fP
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.TP
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VMS (quotes for \fIlowercase\fP):
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\f(CW\&define ZIPINFO_OPTS "\-l"\fP
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.EE
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.PP
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If, in addition, the user dislikes the trailer line, \fIzipinfo\fP's
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concept of ``negative options'' may be used to override the default
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inclusion of the line. This is accomplished by preceding the undesired
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option with one or more minuses: e.g., ``\fC\-l\-t\fR'' or ``\fC\-\-tl\fR'',
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in this example. The first hyphen is the regular switch character, but the
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one before the `t' is a minus sign. The dual use of hyphens may seem a
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little awkward, but it's reasonably intuitive nonetheless: simply ignore
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the first hyphen and go from there. It is also consistent with the behavior
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of the Unix command \fInice\fP(1).
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.PP
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As suggested above, the default variable names are ZIPINFO_OPTS for VMS
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(where the symbol used to install \fIzipinfo\fP as a foreign command
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would otherwise be confused with the environment variable), and ZIPINFO
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for all other operating systems. For compatibility with \fIzip\fP(1L),
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ZIPINFOOPT is also accepted (don't ask). If both ZIPINFO and ZIPINFOOPT
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are defined, however, ZIPINFO takes precedence. \fIunzip\fP's diagnostic
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option (\fB\-v\fP with no zipfile name) can be used to check the values
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of all four possible \fIunzip\fP and \fIzipinfo\fP environment variables.
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.PD
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.\" =========================================================================
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.SH EXAMPLES
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To get a basic, short-format listing of the complete contents of a ZIP
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archive \fIstorage.zip\fP, with both header and totals lines, use only
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the archive name as an argument to zipinfo:
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.PP
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.EX
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zipinfo storage
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.EE
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.PP
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To produce a basic, long-format listing (not verbose), including header and
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totals lines, use \fB\-l\fP:
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.PP
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.EX
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zipinfo \-l storage
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.EE
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.PP
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To list the complete contents of the archive without header and totals
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lines, either negate the \fB\-h\fP and \fB\-t\fP options or else specify the
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contents explicitly:
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.PP
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.EX
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zipinfo \-\-h\-t storage
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zipinfo storage \e*
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.EE
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.PP
|
|
(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):
|
|
.PP
|
|
.EX
|
|
setenv ZIPINFO \-\-t
|
|
zipinfo storage
|
|
.EE
|
|
.PP
|
|
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 \fB\-s\fP option explicitly, since the \fB\-t\fP
|
|
option by itself implies that ONLY the footer line is to be printed:
|
|
.PP
|
|
.EX
|
|
setenv ZIPINFO \-\-t
|
|
zipinfo \-t storage \fR[only totals line]\fP
|
|
zipinfo \-st storage \fR[full listing]\fP
|
|
.EE
|
|
.PP
|
|
The \fB\-s\fP option, like \fB\-m\fP and \fB\-l\fP, includes headers and
|
|
footers by default, unless otherwise specified. Since the environment
|
|
variable specified no footers and that has a higher precedence than the
|
|
default behavior of \fB\-s\fP, an explicit \fB\-t\fP option was necessary
|
|
to produce the full listing. Nothing was indicated about the header,
|
|
however, so the \fB\-s\fP option was sufficient. Note that both the
|
|
\fB\-h\fP and \fB\-t\fP 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 \fIzipinfo\fP is
|
|
used with a wildcard zipfile specification; the contents of all zipfiles
|
|
are then summarized with a single command.
|
|
.PP
|
|
To list information on a single file within the archive, in medium format,
|
|
specify the filename explicitly:
|
|
.PP
|
|
.EX
|
|
zipinfo \-m storage unshrink.c
|
|
.EE
|
|
.PP
|
|
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 \fB\-t\fP may be specified explicitly:
|
|
.PP
|
|
.EX
|
|
zipinfo \-mt storage "*.[ch]" Mak\e*
|
|
.EE
|
|
.PP
|
|
To get maximal information about the ZIP archive, use the verbose
|
|
option. It is usually wise to pipe the output into a filter such as
|
|
Unix \fImore\fP(1) if the operating system allows it:
|
|
.PP
|
|
.EX
|
|
zipinfo \-v storage | more
|
|
.EE
|
|
.PP
|
|
Finally, to see the most recently modified files in the archive, use
|
|
the \fB\-T\fP option in conjunction with an external sorting utility
|
|
such as Unix \fIsort\fP(1) (and \fIsed\fP(1) as well, in this example):
|
|
.PP
|
|
.EX
|
|
zipinfo \-T storage | sort -nr -k 7 | sed 15q
|
|
.EE
|
|
.PP
|
|
The \fB\-nr\fP option to \fIsort\fP(1) tells it to sort numerically
|
|
in reverse order rather than in textual order, and the \fB\-k\ 7\fP option
|
|
tells it to sort on the seventh field. This
|
|
assumes the default short-listing format; if \fB\-m\fP or \fB\-l\fP is
|
|
used, the proper \fIsort\fP(1) option would be \fB\-k\ 8\fP.
|
|
Older versions of \fIsort\fP(1) do not support the \fB\-k\fP option,
|
|
but you can use the traditional \fB\+\fP option instead, e.g.,
|
|
\fB\+6\fP instead of \fB\-k\ 7\fP. The \fIsed\fP(1)
|
|
command filters out all but the first 15 lines of the listing. Future
|
|
releases of \fIzipinfo\fP may incorporate date/time and filename sorting
|
|
as built-in options.
|
|
.PD
|
|
.\" =========================================================================
|
|
.SH TIPS
|
|
The author finds it convenient to define an alias \fIii\fP for \fIzipinfo\fP
|
|
on systems that allow aliases (or, on other systems, copy/rename the
|
|
executable, create a link or create a command file with the name \fIii\fP).
|
|
The \fIii\fP usage parallels the common \fIll\fP alias for long listings in
|
|
Unix, and the similarity between the outputs of the two commands was
|
|
intentional.
|
|
.PD
|
|
.\" =========================================================================
|
|
.SH BUGS
|
|
As with \fIunzip\fP, \fIzipinfo\fP's \fB\-M\fP (``more'') option is overly
|
|
simplistic in its handling of screen output; as noted above, it fails to detect
|
|
the wrapping of long lines and may thereby cause lines at the top of the screen
|
|
to be scrolled off before being read. \fIzipinfo\fP should detect and treat
|
|
each occurrence of line-wrap as one additional line printed. This requires
|
|
knowledge of the screen's width as well as its height. In addition,
|
|
\fIzipinfo\fP should detect the true screen geometry on all systems.
|
|
.PP
|
|
\fIzipinfo\fP's listing-format behavior is unnecessarily complex and should
|
|
be simplified. (This is not to say that it will be.)
|
|
.PP
|
|
.\" =========================================================================
|
|
.SH "SEE ALSO"
|
|
\fIls\fP(1), \fIfunzip\fP(1L), \fIunzip\fP(1L), \fIunzipsfx\fP(1L),
|
|
\fIzip\fP(1L), \fIzipcloak\fP(1L), \fIzipnote\fP(1L), \fIzipsplit\fP(1L)
|
|
.PD
|
|
.\" =========================================================================
|
|
.SH URL
|
|
The Info-ZIP home page is currently at
|
|
.EX
|
|
\fChttp://www.info-zip.org/pub/infozip/\fR
|
|
.EE
|
|
or
|
|
.EX
|
|
\fCftp://ftp.info-zip.org/pub/infozip/\fR .
|
|
.EE
|
|
.PD
|
|
.\" =========================================================================
|
|
.SH AUTHOR
|
|
Greg ``Cave Newt'' Roelofs. ZipInfo contains pattern-matching code
|
|
by Mark Adler and fixes/improvements by many others. Please refer to the
|
|
CONTRIBS file in the UnZip source distribution for a more complete list.
|