unzip_def.rnh
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- .!
- .! File: UNZIP_DEF.RNH
- .!
- .! Author: Hunter Goatley
- .!
- .! Date: October 23, 1991
- .!
- .! Description:
- .!
- .! RUNOFF source file for VMS on-line help for portable UnZip.
- .! Adapted from UNZIP.MAN (now UNZIP.DOC).
- .!
- .! To build: $ REN UNZIP_DEF.RNH UNZIP.RNH
- .! $ RUNOFF UNZIP.RNH
- .! $ LIBR/HELP/INSERT libr UNZIP
- .!
- .! Modification history:
- .!
- .! 01-001 Hunter Goatley 23-OCT-1991 09:21
- .! Genesis.
- .! 01-002 Cave Newt 16-MAR-1992 22:37
- .! Updated for UnZip 4.2.
- .! 01-003 Igor Mandrichenko 23-MAY-1992 22:14
- .! Added -X option to command syntax.
- .! 01-004 Cave Newt 24-MAY-1992 13:30
- .! Added UNZIP_OPTS environment variable help.
- .! 01-005 Igor Mandrichenko 14-DEC-1993 18:55
- .! Modified for UnZip V5.1
- .! 01-006 Cave Newt 21-DEC-1993 12:38
- .! Added -x option and cleaned up.
- .! 01-007 Cave Newt 14-JUL-1994 09:45
- .! Added -Z, -C and -L options, removed -U, minor clean-up.
- .! 01-008 Cave Newt 28-JUL-1994 08:57
- .! Removed semi-colons from comments.
- .! 02-001 Christian Spieler 09-DEC-1995 02:25
- .! Modified for UnZip 5.2.
- .! 02-002 Christian Spieler 06-FEB-1996 02:25
- .! Added -h "help" option.
- .! 02-003 Christian Spieler 04-MAR-1997 20:25
- .! Added -P "command line password" option.
- .! 02-004 Christian Spieler 26-JUL-1997 00:05
- .! Added Exit_Codes subtopic, explaining UnZip's VMS return codes.
- .!
- .noflags
- .lm4 .rm72
- .indent -4
- 1 UNZIP
- .br
- UnZip is used to extract files compressed and packaged by Zip (see HELP ZIP
- for information on ZIP).
- .sk
- For a brief help on Zip and Unzip, run each without specifying any
- parameters on the command line, or specify the -h flag (but not in UnZip's
- Zipinfo mode).
- .sk
- 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.
- .sk
- 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:
- .sk;.lm+1;.literal
- UNZIP [-cfhlptuvxz[ajnoqCLMVX]] file[.zip] [list] [-x xlist] [-d out_dir]
- .end literal;.lm-1
- .!------------------------------------------------------------------------------
- .indent -4
- 2 Parameters
- .sk;.indent -4
- file[.zip]
- .sk
- File specification for the ZIP archive(s) with optional wildcards. UnZip will
- perform actions specified for every zipfile matching the specification.
- Default file specification is SYS$DISK:[].ZIP.
- Note that self-extracting ZIP files are supported; just specify the .EXE
- suffix yourself.
- .sk;.indent -4
- [list]
- .sk
- An optional list of archive members to be processed; if no list is given, all
- archive members are processed. Expressions may be
- used to match multiple members. Expressions should be enclosed in double-quotes
- to prevent interpretation by DCL. Multiple filenames should be separated by
- blanks. Each file specification is similar to a Unix egrep expression and may
- contain:
- .sk
- .literal
- * matches a sequence of 0 or more characters
- ? matches exactly 1 character
- [...] matches any single character found inside the brackets;
- ranges are specified by a beginning character,
- a hyphen, and an ending character. If a '!' or '^'
- immediately follows the left bracket, then any character
- not in the given range is matched.
- .end literal
- .sk
- .sk;.indent -4
- [-x xlist]
- .sk
- An optional list of archive members to be excluded from processing. The xlist
- overrides any files included in the normal list.
- .sk;.indent -4
- [-d out_dir]
- .sk
- Optional directory specification to be used as target root directory
- for files to be extracted. Directory should be specified in "[.foo]"
- format rather than "foo.dir" or "foo/" format.
- .!------------------------------------------------------------------------------
- .indent -4
- 2 Options
- .br
- The default action of UnZip is to extract all zipfile entries. The following
- options and modifiers can be provided:
- .sk;.literal
- -Z ZipInfo mode
- -c extract files to SYS$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
- -u update existing files; create new ones if needed
- -v list archive files (verbose format)
- -z display only the archive comment
- .end literal;.sk;.literal
- MODIFIERS
- -a extract text files in standard VMS text file format
- -aa extract all files as text
- -b auto-extract only binary files in VMS fixed 512-byte record format
- -bb extract all files as binary in VMS fixed 512-byte record format
- -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 DOS, VMS, etc.
- -M feed screen output through built-in "more" pager
- -P<password> supply decryption password on the command line (insecure!)
- -V retain (VMS) file version numbers
- -X restore owner/protection info (may require privileges)
- .end literal;.sk
- Note that uppercase options (-C, -L, -M, -P, -V and -X) must be specified
- in quotes. For example:
- .sk;.literal
- unzip "-VX" -a zipfile
- .end literal;.sk
- The output conversion options -b and -a may be combined to perform
- binary conversions on binary files and text conversion on text files.
- But note: For compatibility with implementation on other systems, -b cancels
- any -a option; to get the intended result, -a must be specified AFTER -b.
- And, in combination, "text" recognition takes precedence; this means
- that -bb has the same effect as -b, and -aa overrides binary conversion
- for ALL files.
- .sk
- Please note that using the "-P<password>" option is higly insecure, the
- plaintext password may be seen by others. For this reason (and because of
- lack of space), the "-P<password>" option is not advertised on UnZip's
- online help screen.
- .!------------------------------------------------------------------------------
- .indent -4
- 2 Exit_Codes
- .br
- On VMS, UnZip's UNIX style exit values are mapped into proper
- VMS status codes:
- .sk;.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
- .end literal;.sk
- The UnZip error level (or exit code) approximates the exit
- codes defined by PKWARE and takes on the following values:
- .sk;.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.)
- .end literal;.sk
- 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.
- .!------------------------------------------------------------------------------
- .indent -4
- 2 Logical_Names
- .br
- UnZip allows to modify its default behaviour by specifying option defaults
- via the UNZIP_OPTS logical name.
- For example, the following will cause UnZip to restore owner/protection
- information and perform all operations at quiet-level 1 by default:
- .sk;.literal
- define UNZIP_OPTS "-qX"
- .end literal;.sk
- 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
- `-':
- .sk;.literal
- unzip --ql zipfile
- .end literal
- or
- .literal
- unzip -l-q zipfile
- .end literal;.sk
- At present it is not possible to decrement an option below zero--that is,
- more than a few minuses have no effect.
- .sk
- UNZIP_OPTS may be defined as a symbol rather than a logical name, but if
- both are defined, the logical name takes precedence.
- .!-----------------------------------------------------------------------------
- .indent -4
- 2 Authors
- .br
- Info-ZIP; currently maintained by Greg Roelofs. VMS support maintained
- by Christian Spieler and Hunter Goatley. Originally based on a program
- by Samuel H. Smith.
- .sk
- VMS on-line help ported from UNZIP.DOC by Hunter Goatley.