297 lines
13 KiB
Plaintext
297 lines
13 KiB
Plaintext
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.!
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.! File: UNZIP_DEF.RNH
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.!
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.! Author: Hunter Goatley
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.!
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.! Date: October 23, 1991
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.!
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.! Description:
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.!
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.! RUNOFF source file for VMS on-line help for portable UnZip.
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.! Adapted from UNZIP.MAN (now UNZIP.TXT).
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.!
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.! To build: $ REN UNZIP_DEF.RNH UNZIP.RNH
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.! $ RUNOFF UNZIP.RNH
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.! $ LIBR/HELP/INSERT libr UNZIP
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.!
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.! Modification history:
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.!
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.! 01-001 Hunter Goatley 23-OCT-1991 09:21
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.! Genesis.
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.! 01-002 Cave Newt 16-MAR-1992 22:37
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.! Updated for UnZip 4.2.
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.! 01-003 Igor Mandrichenko 23-MAY-1992 22:14
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.! Added -X option to command syntax.
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.! 01-004 Cave Newt 24-MAY-1992 13:30
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.! Added UNZIP_OPTS environment variable help.
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.! 01-005 Igor Mandrichenko 14-DEC-1993 18:55
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.! Modified for UnZip V5.1
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.! 01-006 Cave Newt 21-DEC-1993 12:38
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.! Added -x option and cleaned up.
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.! 01-007 Cave Newt 14-JUL-1994 09:45
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.! Added -Z, -C and -L options, removed -U, minor clean-up.
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.! 01-008 Cave Newt 28-JUL-1994 08:57
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.! Removed semi-colons from comments.
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.! 02-001 Christian Spieler 09-DEC-1995 02:25
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.! Modified for UnZip 5.2.
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.! 02-002 Christian Spieler 06-FEB-1996 02:25
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.! Added -h "help" option.
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.! 02-003 Christian Spieler 04-MAR-1997 20:25
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.! Added -P "command line password" option.
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.! 02-004 Christian Spieler 26-JUL-1997 00:05
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.! Added Exit_Codes subtopic, explaining UnZip's VMS return codes.
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.! 02-005 Christian Spieler 28-APR-2000 03:22
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.! Changed references to plaintext UnZip documentation file
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.! into "UNZIP.TXT".
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.! 02-006 Christian Spieler 15-APR-2001 22:29
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.! Added description for extended functionality of -b option.
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.! 02-007 Christian Spieler 10-DEC-2001 13:58
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.! Added description for new -: traverse dirs option.
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.! 02-008 Christian Spieler 29-JAN-2005 01:50
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.! Added description for the -T "set archive timestamp" option.
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.! 02-009 Christian Spieler 04-MAR-2007 14:37
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.! Added description for the -S "Stream-LF text files" option;
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.! updated the documentation of the VMS exit codes.
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.! 02-010 S. Schweda, C. Spieler 28-Dec-2007 21:28
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.! Added description for the -D "timestamp restoration" option.
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.!
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.noflags
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.lm4 .rm72
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.indent -4
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1 UNZIP
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.br
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UnZip is used to extract files compressed and packaged by Zip (see HELP ZIP
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for information on ZIP).
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.sk
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For a brief help on Zip and Unzip, run each without specifying any
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parameters on the command line, or specify the -h flag (but not in UnZip's
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Zipinfo mode).
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.sk
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UNZIP will list, test, or extract from a ZIP archive. ZIP archives are commonly
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found on MS-DOS systems; a VMS version of ZIP can also be found here.
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.sk
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Archive member extraction is implied by the absence of the -c, -p, -t, -l, -v or
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-z options. All archive members are processed unless a filespec is provided to
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specify a subset of the archive members.
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Format:
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.sk;.lm+1;.literal
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UNZIP [-cfhlptTuvxz[ajnoqCDLMSVXY:2]] file[.zip] [list] [-x xlist] [-d out_dir]
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.end literal;.lm-1
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.!------------------------------------------------------------------------------
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.indent -4
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2 Parameters
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.sk;.indent -4
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file[.zip]
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.sk
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File specification for the ZIP archive(s) with optional wildcards. UnZip will
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perform actions specified for every zipfile matching the specification.
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Default file specification is SYS$DISK:[].ZIP.
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Note that self-extracting ZIP files are supported; just specify the .EXE
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suffix yourself.
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.sk;.indent -4
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[list]
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.sk
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An optional list of archive members to be processed; if no list is given, all
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archive members are processed. Expressions may be
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used to match multiple members. Expressions should be enclosed in double-quotes
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to prevent interpretation by DCL. Multiple filenames should be separated by
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blanks. Each file specification is similar to a Unix egrep expression and may
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contain:
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.sk
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.literal
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* matches a sequence of 0 or more characters
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? matches exactly 1 character
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[...] matches any single character found inside the brackets;
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ranges are specified by a beginning character, a hyphen,
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and an ending character. If a '!' or '^' immediately
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follows the left bracket, then any character not in the
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given range is matched.
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Hint: To specify a verbatim left bracket '[', the
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three-character sequence "[[]" has to be used.
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.end literal
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.sk
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.sk;.indent -4
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[-x xlist]
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.sk
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An optional list of archive members to be excluded from processing. The xlist
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overrides any files included in the normal list.
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.sk;.indent -4
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[-d out_dir]
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.sk
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Optional directory specification to be used as target root directory
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for files to be extracted. Directory should be specified in "[.foo]"
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format rather than "foo.dir" or "foo/" format.
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.!------------------------------------------------------------------------------
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.indent -4
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2 Options
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.br
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The default action of UnZip is to extract all zipfile entries. The following
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options and modifiers can be provided:
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.sk;.literal
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-Z ZipInfo mode
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-c extract files to SYS$OUTPUT (terminal)
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-f freshen existing files (replace if newer); create none
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-h show brief help screen and exit quietly
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-l list archive files (short format)
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-p extract files to SYS$OUTPUT; no informational messages
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-t test archive files
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-T set zipfile timestamps to that of each archive's newest entry
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-u update existing files; create new ones if needed
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-v list archive files (verbose format)
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-z display only the archive comment
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.end literal;.sk;.literal
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MODIFIERS
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-a extract text files in standard VMS text file format
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-aa extract all files as text
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-b auto-extract only binary files in fixed 512-byte record format
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-bb extract all files as binary in fixed 512-byte record format
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-j junk paths (don't recreate archive's directory structure)
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-n never overwrite or make a new version of an existing file
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-o always make a new version (-oo: overwrite orig) existing file
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-q perform operations quietly (-qq => even quieter)
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-C match filenames case-insensitively
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-D do not restore any timestamps (--D restore them even for dirs)
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-L convert filenames to lowercase if created under DOS, VMS, etc.
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-M feed screen output through built-in "more" pager
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-P<password> supply decryption password on the cmd line (insecure!)
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-S use Stream_LF record format to extract text files (with -a[a])
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-V retain (VMS) file version numbers
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-X restore owner/ACL protection info (may require privileges)
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-Y treat ".nnn" suffix as version number ("a.b.3" -> "a.b;3")
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-: allow "../" path components to traverse across top extract dir
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-2 force creation of ODS2-compatible file names
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.end literal;.sk
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Note that uppercase options (-C, -D, -L, -M, -P, -S, -T, -V, -X, -Y, and
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-Z) must be specified in quotes (unless SET PROC/PARSE=EXTEND is set).
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For example:
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.sk;.literal
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unzip "-VX" -a zipfile
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.end literal;.sk
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When extracting to SYS$OUTPUT (-c or -p options) redirected to a file,
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you may want to override the default text file conversion by specifying
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the -b option. A single "-b" option switches to "binary piping" mode
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for Zip entries marked as non-text, only. To force "binary piping" mode
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even for Zip file entries marked as text, the "-bb" option should be used.
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(Please note that a later "-a" cancels any -b option, see below.)
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.sk
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The output conversion options -b and -a may be combined to perform
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binary conversions on binary files and text conversion on text files.
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But note: For compatibility with implementation on other systems, -b cancels
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any -a option; to get the intended result, -a must be specified AFTER -b.
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And, in combination, "text" recognition takes precedence; this means
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that -bba (-bb -a) has the same effect as -ba (-b -a), and -aa overrides
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binary conversion for ALL files.
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.sk
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The conversion option -S is only effective when used together with
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-a or -aa. When specified, "text" files are written in Stream-LF record
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format instead of the VMS default of Variable-Length record format.
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(When no conversion options are specified, all non-VMS entries are always
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written as Stream-LF files.)
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.sk
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Please note that using the "-P<password>" option is higly insecure, the
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plaintext password may be seen by others. For this reason (and because of
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lack of space), the "-P<password>" option is not advertised on UnZip's
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online help screen.
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.!------------------------------------------------------------------------------
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.indent -4
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2 Exit_Status
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.br
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On VMS, UnZip's UNIX-style exit values are mapped into VMS-style status
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codes with facility code 1954 = %x7A2, and with the inhibit-message
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(%x10000000) and facility-specific (%x00008000) bits set:
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.sk
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.literal
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%x17A28001 normal exit
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%x17A28000 + 16*UnZip_error_code warnings
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%x17A28002 + 16*UnZip_error_code normal errors
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%x17A28004 + 16*UnZip_error_code fatal errors
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.end literal
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.sk
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Note that multiplying the UNIX-style UnZip error code by 16 places it
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conveniently in the hexadecimal representation of the VMS exit code,
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"__" in %x17A28__s, where "s" is the severity code. For example, a
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missing archive might cause UnZip error code 9, which would be
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transformed into the VMS exit status %X17A28092.
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.sk
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The UnZip VMS exit codes include severity values which approximate those
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defined by PKWARE, as shown in the following table:
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.literal
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VMS UnZip err
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severity code Error description
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----------+---------+----------------------------------------------
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Success 0 Normal. No errors or warnings detected.
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Warning 1 One or more warnings were encountered, but
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processing completed successfully anyway.
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This includes archives where one or more
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(but not all) files were skipped because of
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unsupported compress or encrypt methods, or
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bad passwords.
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Error 2 Error in the archive format. Processing may
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have completed successfully anyway. Some
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defects in archives (made by other programs)
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can be repaired transparently.
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Fatal 3 Severe error in the archive format. Process-
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ing probably failed immediately.
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Fatal 4 Memory allocation failed in program initial-
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ization.
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Fatal 5 Memory allocation failed in password pro-
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cessing.
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Fatal 6 Memory allocation failed while decompressing
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to disk.
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Fatal 7 Memory allocation failed while decompressing
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in memory.
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Fatal 8 Memory allocation failed (reserved for
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future use).
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Error 9 Specified archive files were not found.
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Error 10 Invalid command-line options or parameters.
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Error 11 No files matched selection criteria.
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Fatal 50 Disk full.
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Fatal 51 Unexpected end-of-file while reading the
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archive.
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Error 80 User interrupt (Ctrl/C).
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Error 81 No files were processed, because of unsup-
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ported compress or encrypt methods.
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Error 82 No files were processed, because of bad
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password(s).
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Fatal 83 Large-file archive could not be processed by
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this small-file program.
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.end literal
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.!------------------------------------------------------------------------------
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.indent -4
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2 Logical_Names
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.br
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UnZip allows to modify its default behaviour by specifying option defaults
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via the UNZIP_OPTS logical name.
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For example, the following will cause UnZip to restore owner/protection
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information and perform all operations at quiet-level 1 by default:
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.sk;.literal
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define UNZIP_OPTS "-qX"
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.end literal;.sk
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Note that the quotation marks here are required to preserve lowercase options
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(opposite of the command-line behavior).
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To negate a default option on the command line, add one or more minus
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signs before the option letter, in addition to the leading switch character
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`-':
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.sk;.literal
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unzip --ql zipfile
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.end literal
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or
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.literal
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unzip -l-q zipfile
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.end literal;.sk
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At present it is not possible to decrement an option below zero--that is,
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more than a few minuses have no effect.
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.sk
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UNZIP_OPTS may be defined as a symbol rather than a logical name, but if
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both are defined, the logical name takes precedence.
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.!-----------------------------------------------------------------------------
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.indent -4
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2 Authors
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.br
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Info-ZIP; currently maintained by Christian Spieler. VMS support maintained
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by Christian Spieler and Hunter Goatley. Originally based on a program
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by Samuel H. Smith.
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.sk
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VMS on-line help ported from UNZIP.TXT by Hunter Goatley.
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