.!
.! 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.TXT).
.!
.! To build:
.! $ EDIT /TPU/NOSECTION/NODISPLAY/COMMAND=CVTHELP.TPU UNZIP_CLI.HELP
.! $ RUNOFF /OUT=UNZIP.HLP UNZIP_CLI.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.
.! 02-004 Christian Spieler 06-OCT-1995 02:02
.! Changed to conform to revised .CLD definition.
.! 02-005 Christian Spieler 06-FEB-1996 02:20
.! Added description of /HELP qualifier.
.! 02-006 Christian Spieler 12-MAY-1996 00:50
.! Some clarifications/cleanups.
.! 02-007 Christian Spieler 04-MAR-1997 22:25
.! Added /[NO]CASE_INSENSITIVE to ZipInfo mode;
.! documented the new /PASSWORD="decryption_key" option.
.! 02-007 Christian Spieler 22-JUL-1997 22:37
.! Formatting changes (prevent line wraps); added "Exit_Codes"
.! subtopic (no version number change).
.! 02-007 Christian Spieler 28-APR-2000 03:22
.! Changed references to plaintext UnZip documentation file
.! into UNZIP.TXT (no version number change).
.! 02-007 Hunter Goatley 07-Feb-2001 15:43
.! Reformatted qualifier item headers to show negated form of
.! option qualifier on separate line (no version number change).
.! 02-008 Christian Spieler 18-Apr-2001 22:29
.! Added description for extended functionality of -b option.
.! 02-009 Christian Spieler 10-Dec-2001 13:37
.! Added description for new /TRAVERSE_DIRS option.
.! 02-010 Steven Schweda 28-Jan-2005 16:16:36
.! Added /TIMESTAMP (-T) qualifier.
.! 02-010 Christian Spieler 29-Jan-2005 01:50
.! Completed description of -T qualifier (also for UNIX style).
.!
<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 (or apply the /HELP qualifier).
To get a brief help sceen about the alternate UNIX style command interface,
run each with the -h option applied.
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 /SCREEN (-c),
/PIPE (-p), /TEST (-t), /TIMESTAMP (-T), /LIST (-l, -v) or /COMMENT (-z)
qualifiers (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$DISK:[].ZIP.
Note that self-extracting ZIP files are supported; just specify the .EXE
suffix yourself.
<TXETP>
<PARAMETER>
file
<PTEXT>
An optional comma-separated list of archive members to be processed;
if no list is given, all archive members are processed. Expressions
may be used to match multiple members. Expressions should be enclosed
in double-quotes to prevent interpretation by DCL. Multiple filenames
should be separated by blanks. Each file specification is similar to
a Unix egrep expression and may contain:
<LITERAL>
|* matches a sequence of 0 or more characters
|? matches exactly 1 character
|[...] matches any single character found inside the brackets;
| ranges are specified by a beginning character, a hyphen,
| and an ending character. If a '!' or '^' immediately
| follows the left bracket, then any character not in the
| given range is matched.
| Hint: To specify a verbatim left bracket '[', the
| three-character sequence "[[]" has to be used.
<LARETIL>
<TXETP>
<QUALIFIERS>
<QUALIFIER>
/ZIPINFO
/ZIPINFO
Displays information about the Zip archive and the files contained therein.
This function used to be provided by a separate ZipInfo program.
The following qualifiers may be specified with /ZIPINFO:
<LITERAL>
| /SHORT Short UNIX "ls -l" format (default)
| /MEDIUM Medium UNIX "ls -l" format
| /LONG Long UNIX "ls -l" format
| /VERBOSE Verbose, multi-page format
| /ONE_LINE Filenames only, one per line
| /HEADER Print header lines
| /TOTALS Print totals for files
| /TIMES Print file times in sortable decimal format
| /[NO]CASE_INSENSITIVE Match filenames case-insensitively
| /[NO]PAGE Page screen output through built-in "more"
<LARETIL>
<QUALIFIER>
/BINARY
/BINARY[=KEYWORD]
<NEXT>
/NOBINARY (default)
Selects conversion to VMS "standard" binary file format for
extracted files, which is "fixed length 512 byte records,
no record attributes". When extracting to SYS$OUTPUT (/SCREEN
or /PIPE qualifier), this qualifier deactivates the default
"text data" conversion, instead.
The optional keywords recognized are:
<LITERAL>
| AUTO Automatically extracts files marked as "binary" (rather
| than "text") in standard VMS binary file format. (default)
| ALL Extracts all files in standard VMS binary file format.
| NONE Same as /NOBINARY.
<LARETIL>
Note that a combination of /BINARY[=AUTO] and /TEXT[=AUTO] is allowed.
(see /TEXT qualifier)
<QUALIFIER>
/BRIEF
/BRIEF (default)
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
<NEXT>
/NOCASE_INSENSITIVE (default)
Match filenames case-insensitively. (Good default option under VMS.)
<QUALIFIER>
/COMMENT
/COMMENT
<NEXT>
/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
<NEXT>
/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>
/HELP
/HELP
Displays a one-page brief help screen and exits quietly.
<QUALIFIER>
/JUNK
/JUNK
<NEXT>
/NOJUNK (default)
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
<NEXT>
/NOLOWERCASE (default)
Convert filenames from all-uppercase operating systems to lowercase. This
option has no effect under VMS.
<QUALIFIER>
/OVERWRITE
/OVERWRITE
<NEXT>
/NOOVERWRITE
The qualifier /OVERWRITE forces overwriting of existing files when extracting.
The negation /NOOVERWRITE results in never overwriting an existing file.
The default action is to prompt for desired action when about to
overwrite an existing file.
For VMS, "overwriting" results in the creation of a new version of the file,
unless version numbers are stored in the archive and /VERSION is specified.
<QUALIFIER>
/PAGE
/PAGE
<NEXT>
/NOPAGE
Feed all screen output through the built-in "more" pager.
<QUALIFIER>
/PASSWORD
/PASSWORD=decryption-password
Specifies a decryption password and prevents UnZip from prompting for
a password in case the specified decryption key was wrong. The supplied
string must be enclosed in double-quotes whenever it contains lowercase
or special characters.
<QUALIFIER>
/PIPE
/PIPE
Extract files to SYS$OUTPUT with no informational messages.
<QUALIFIER>
/QUIET
/QUIET[=SUPER]
Perform operations quietly. The keyword SUPER can be specified to make
operations even more quiet.
<QUALIFIER>
/RESTORE
/RESTORE
<NEXT>
/NORESTORE
Restore file owner and protection settings.
<QUALIFIER>
/SCREEN
/SCREEN
<NEXT>
/NOSCREEN
Extracts matching files to SYS$OUTPUT (the terminal).
<QUALIFIER>
/TEST
/TEST
<NEXT>
/NOTEST
Test archive files.
<QUALIFIER>
/TEXT
/TEXT[=KEYWORD]
<NEXT>
/NOTEXT (default)
Selects conversion to VMS standard text file format.
The optional keywords recognized are:
<LITERAL>
| AUTO Automatically extracts files marked as "text" (rather
| than "binary") in standard VMS text file format. (default)
| ALL Extracts all files in standard VMS text file format.
| NONE Same as /NOTEXT.
<LARETIL>
A similar functionality is available for binary files, see qualifier /BINARY.
<QUALIFIER>
/TIMESTAMP
/TIMESTAMP
Sets the timestamp of an archive to that of its newest file. This qualifier
corresponds to zip's /APPEND/LATEST (-go) option, but can be applied to
wildcard zipfile specifications (e.g. "*.zip") and is much faster.
<QUALIFIER>
/TRAVERSE_DIRS
/TRAVERSE_DIRS
<NEXT>
/NOTRAVERSE_DIRS (default)
Allows to extract archive members into locations outside of the currently
active "extraction root dir". For security reasons, UnZip normally
removes "parent dir" path components ("../") from the names of extracted
files. This feature (new for UnZip 5.50) prevents UnZip from accidentally
writing files to "sensitive" areas outside the directory tree below the
specified "extraction root". By specifying the /TRAVERSE_DIRS option,
this security feature can be switched off. This allows users to extract
(older) archives that made use of "../" to create multiple directory
trees at the level of the current extraction folder.
<QUALIFIER>
/UPDATE
/UPDATE
<NEXT>
/NOUPDATE
Update existing files; create new ones if needed.
<QUALIFIER>
/VERSION
/VERSION
<NEXT>
/NOVERSION (default)
Retain VMS file version numbers.
<TOPIC>
Authors
Info-ZIP; currently maintained by Christian Spieler. VMS support maintained
by Igor Mandrichenko, Steven M. Schweda, Christian Spieler and Hunter Goatley.
Originally based on a program by Samuel H. Smith.
VMS on-line help ported from UNZIP.TXT by Hunter Goatley.
<TOPIC>
Exit_Codes
On VMS, UnZip's UNIX style exit values are mapped into proper
VMS status codes:
<LITERAL>
| 1 (success) normal exit,
| (0x7fff0000 + 16*UnZip_errnum) -W- warnings
| (0x7fff0002 + 16*UnZip_errnum) -E- normal errors
| (0x7fff0004 + 16*UnZip_errnum) -F- fatal errors
<LARETIL>
The UnZip error level (or exit code) approximates the exit
codes defined by PKWARE and takes on the following values:
<LITERAL>
| VMS UnZip Type of error
| severity errcode
| - 0 normal; no errors or warnings detected.
|
| W 1 one or more warning errors were encountered,
| but processing completed successfully any-
| way. This includes zipfiles where one or
| more files was skipped due to unsupported
| compression method or encryption with an
| unknown password.
|
| E 2 a generic error in the zipfile format was
| detected. Processing may have completed
| successfully anyway; some broken zipfiles
| created by other archivers have simple work-
| arounds.
|
| F 3 a severe error in the zipfile format was
| detected. Processing probably failed imme-
| diately.
|
| F 4 unzip was unable to allocate memory for one
| or more buffers during program initializa-
| tion.
|
| F 5 unzip was unable to allocate memory or
| unable to obtain a tty to read the decryp-
| tion password(s).
|
| F 6 unzip was unable to allocate memory during
| decompression to disk.
|
| F 7 unzip was unable to allocate memory during
| in-memory decompression.
|
| F 8 [currently not used]
|
| E 9 the specified zipfiles were not found.
|
| E 10 invalid options were specified on the com-
| mand line.
|
| E 11 no matching files were found.
|
| F 50 the disk is (or was) full during extraction.
|
| F 51 the end of the ZIP archive was encountered
| prematurely.
|
| E 80 the user aborted unzip prematurely with con-
| trol-C (or similar)
|
| E 81 no files were found due to unsupported com-
| pression methods or unsupported decryption.
| (If even one additional file is successfully
| processed, however, the exit status is 1.)
|
| E 82 no files were found due to bad decryption
| password(s). This is also the exit status
| if no files were found due to a combination
| of unsupported compression and bad pass-
| words. As in the previous case, however, a
| single successful file will result in an
| exit status of 1 instead.)
<LARETIL>
In addition, there is a compilation option to expand upon this behavior:
An executable compiled with the option RETURN_CODES defined displays
a human-readable explanation of what the error status means.
<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$OUTPUT (terminal)
| -f freshen existing files (replace if newer); create none
| -h show brief help screen and exit quietly
| -l list archive files (short format)
| -p extract files to SYS$OUTPUT; no informational messages
| -t test archive files
| -T set zipfile timestamps to that of each archive's newest entry
| -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
| -b auto-extract only binary files in VMS fixed 512 bytes records
| -bb extract all files as binary VMS fixed 512 byte record files
| -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 on MSDOS, VMS, etc.
| -P<pwd> supply decryption password on the command line (insecure!)
| -M page output through built-in "more" function
| -V retain (VMS) file version numbers
| -X restore owner/protection info (may require privileges)
| -: allow "../" path components that traverse across extract dir root
<LARETIL>
Note that uppercase options such as -C, -L, -M, -P, -T, -V, -X and -Z
must be specified in quotes. For example:
<LITERAL>
| $ unzip "-VX" -a zipfile
<LARETIL>
<TOPIC>
UNZIP_OPTS_Default
UnZip allows to modify its default behaviour by specifying (UNIX style)
option defaults via the UNZIP_OPTS logical name.
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.