unzip_cli.help

压缩算法的源代码

.!
.!  File:	UNZIP_CLI.HELP
.!
.!  Author:	Hunter Goatley
.!
.!  Date:	12 Jul 94 (orig. UNZIP.RNH, 23 Oct 91)
.!
.!  Description:
.!
.!	TPU-processable source file to produce VMS on-line help for
.!	portable UnZip.  Adapted from UNZIP.RNH, originally based on
.!	UNZIP.MAN (now UNZIP.DOC).
.!
.!	To build:
.!	    $ EDIT /TPU/NOSECTION/NODISPLAY/COMMAND=CVTHELP.TPU UNZIP_CLI.HELP
.!	    $ REN UNZIP_CLI.RNH UNZIP.RNH
.!	    $ RUNOFF UNZIP.RNH
.!	    $ LIBR /HELP/INSERT libr UNZIP
.!
.!  Modification history:
.!
.!	02-001		Hunter Goatley		12-JUL-1994 16:59
.!		Genesis.
.!	02-002		Cave Newt		14-JUL-1994 11:36
.!		Fixed /*TEXT options and added/removed various options.
.!	02-003		Cave Newt		28-JUL-1994 08:54
.!		Removed semicolons from comments and moved /ZIPINFO.
.!
<INIT>
<MAIN>
UNZIP

UnZip is used to extract files compressed and packaged by Zip (see HELP ZIP
for information on ZIP).

For a brief help on Zip and Unzip, run each without specifying any
parameters on the command line.

UNZIP will list, test, or extract from a ZIP archive.  ZIP archives are commonly
found on MS-DOS systems; a VMS version of ZIP can also be found here.

Archive member extraction is implied by the absence of the -c, -p, -t, -l, -v or
-z options.  All archive members are processed unless a filespec is provided to
specify a subset of the archive members.
<FORMAT>
UNZIP zipfile [file[,...]] [/qualifiers]

.!
<TOPIC>
Parameters

<PARAMETER>
zipfile

<PTEXT>
File specification for the ZIP archive(s) with optional wildcards. UnZip will
perform actions specified for every zipfile matching the specification.
The default file specification is SYS$DISK:[].ZIP.

Note that self-extracting ZIP files are supported; just specify the .EXE
suffix yourself.
<TXETP>

<PARAMETER>
file

<PTEXT>
An optional comma-separated list of archive members to be processed;
if no list is given, all archive members are processed.  Expressions
may be used to match multiple members.  Expressions should be enclosed
in double-quotes to prevent interpretation by DCL.  Multiple filenames
should be separated by blanks.  Each file specification is similar to
a Unix egrep expression and may contain:

<LITERAL>
|*       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 a '!' or '^'
|        immediately follows the left bracket, then any character
|        not in the given range is matched.
<LARETIL>
<TXETP>

<QUALIFIERS>
<QUALIFIER>
/ZIPINFO

/ZIPINFO

Displays information about the Zip archive and the files contained therein.
This function used to be provided by a separate ZipInfo program.

The following qualifiers may be specified with /ZIPINFO:

<LITERAL>
|  /SHORT     Short UNIX "ls -l" format (default)
|  /MEDIUM    Medium UNIX "ls -l" format
|  /LONG      Long UNIX "ls -l" format
|  /ONE_LINE  Filenames only, one per line
|  /VERBOSE   Verbose, multi-page format
|  /HEADER    Print header lines
|  /TOTALS    Print totals for files
|  /TIMES     Print file times in sortable decimal format
<LARETIL>
<QUALIFIER>
/AUTOTEXT

/AUTOTEXT
/NOAUTOTEXT

Automatically extracts files marked as "text" (rather than "binary") in
in standard VMS text file format.
<QUALIFIER>
/BRIEF

/BRIEF

When used with /LIST, specifies that a brief listing of the archive's
contents is to be displayed.  A brief listing shows the length, date,
time, and file name for the files in the archive.
<QUALIFIER>
/CASE_INSENSITIVE

/CASE_INSENSITIVE
/NOCASE_INSENSITIVE

Match filenames case-insensitively.  (Good default option under VMS.)
<QUALIFIER>
/COMMENT

/COMMENT
/NOCOMMENT

Display the archive comment.
<QUALIFIER>
/DIRECTORY

/DIRECTORY=directory-spec

Specifies the output directory where all the extracted files are to be
placed.
<QUALIFIER>
/EXCLUDE

/EXCLUDE=file

A comma-separated list of files to exclude when extracting files.
If multiple files are specified, the list should be included in
parentheses.

<QUALIFIER>
/FRESHEN

/FRESHEN
/NOFRESHEN

Freshen existing files; replace if newer.  Does not cause any new files to
be created.
<QUALIFIER>
/FULL

/FULL

When used with /LIST, specifies that a full listing of the archive's
contents is to be displayed.  A full listing shows the length,
compression method, compressed size, compression ratio, date,
time, CRC value, and file name for the files in the archive.
<QUALIFIER>
/JUNK

/JUNK
/NOJUNK

Junk the stored paths (don't recreated the archive's directory
structure.
<QUALIFIER>
/LIST

/LIST

List the contents of the archive.  /BRIEF and /FULL can be used to
specify the amount of information displayed.  The default is /BRIEF.
<QUALIFIER>
/LOWERCASE

/LOWERCASE
/NOLOWERCASE

Convert filenames from all-uppercase operating systems to lowercase.  This 
option has no effect under VMS.
<QUALIFIER>
/OVERWRITE

/OVERWRITE
/NOOVERWRITE

Overwrite existing files when extracting.
<QUALIFIER>
/PIPE

/PIPE

Extract files to SYS$OUTPUT with no informational messages.
<QUALIFIER>
/QUIET

/QUIET

Perform operations quietly.  /SUPER_QUIET can be specified to make it
even quiet.
<QUALIFIER>
/RESTORE

/RESTORE
/NORESTORE

Restore file owner and protection settings.
<QUALIFIER>
/SCREEN

/SCREEN
/NOSCREEN

Extracts matching files to SYS$OUTPUT (the terminal).
<QUALIFIER>
/SUPER_QUIET

/SUPER_QUIET

Perform operations super-quietly.
<QUALIFIER>
/TEST

/TEST
/NOTEST

Test archive files.
<QUALIFIER>
/TEXT

/TEXT
/NOTEXT

Extracts all files in standard VMS text file format.
<QUALIFIER>
/UPDATE

/UPDATE
/NOUPDATE

Update existing files; create new ones if needed.
<QUALIFIER>
/VERSION

/VERSION
/NOVERSION

Retain VMS file version numbers.

<TOPIC>
Authors

Info-ZIP; currently maintained by Greg Roelofs.  VMS support maintained
by Igor Mandrichenko and Hunter Goatley.  Originally based on a program
by Samuel H. Smith.

VMS on-line help ported from UNZIP.DOC by Hunter Goatley.

<TOPIC>
UNIX_Options

The default action of UnZip is to extract all zipfile entries.  The following
options and modifiers can be provided:

<LITERAL>
|   -Z   ZipInfo mode
|   -c   extract files to SYS$OUTPUT (terminal)
|   -f   freshen existing files (replace if newer); create none
|   -l   list archive files (short format)
|   -p   extract files to SYS$OUTPUT; no informational messages
|   -t   test archive files
|   -u   update existing files; create new ones if needed
|   -v   list archive files (verbose format)
|   -z   display only the archive comment
|
| MODIFIERS
|   -a   auto-extract only text files in standard VMS text file format
|   -aa  extract all files as text
|   -j   junk paths (don't recreate archive's directory structure)
|   -n   never overwrite existing files; don't prompt
|   -o   OK to overwrite files without prompting
|   -q   perform operations quietly (-qq => even quieter)
|   -C   match filenames case-insensitively
|   -L   convert filenames to lowercase if created under MS-DOS, VMS, etc.
|   -V   retain (VMS) file version numbers
|   -X   restore owner/protection info (may require privileges)
<LARETIL>

Note that uppercase options such as -C, -L, -V, -X and -Z must be specified 
in quotes.  For example:

<LITERAL>
|  $ unzip "-VX" -a zipfile
<LARETIL>

.![this should probably be a separate section]:
In addition, default options may be specified via the UNZIP_OPTS logical.
For example, the following will cause UnZip to match filenames without regard
to case, restore owner/protection information and perform all operations at 
quiet-level 1 by default:

<LITERAL>
|  $ define UNZIP_OPTS "-qCX"
<LARETIL>

Note that the quotation marks here are required to preserve lowercase options
(opposite of the command-line behavior). To negate a default option on the
command line, add one or more minus  signs before the option letter, in
addition to the leading switch character `-':

<LITERAL>
|  $ unzip --ql zipfile
<LARETIL>

or

<LITERAL>
|  $ unzip -l-q zipfile
<LARETIL>

At present it is not possible to decrement an option below zero--that is,
more than a few minuses have no effect.

UNZIP_OPTS may be defined as a symbol rather than a logical, but if both
are defined, the logical is used.