README
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- VMS README for UnZip 5.3 and later, 25 February 1997
- ----------------------------------------------------
- Notes about using UnZip and zipfiles under VMS (see INSTALL for instructions
- on compiling):
- - Install UnZip as foreign symbol by adding this to login.com:
- $ unzip == "$disk:[dir]unzip.exe"
- $ zipinfo == "$disk:[dir]unzip.exe ""-Z"""
- where "disk" and "dir" are location of UnZip executable; the "$" before
- the disk name is important. Some people, including the author, prefer
- a short alias such as "ii" instead of "zipinfo"; edit to taste. (All of
- the quotes around the -Z are necessary, but don't ask us to explain it...)
- - Optionally install UnZipSFX for use with the MAKESFX.COM command file:
- $ unzipsfx :== disk:[dir]unzipsfx.exe
- Thereafter an archive "foo.zip" may be converted to "foo.exe" simply by
- typing "@makesfx foo" (assuming MAKESFX.COM is in the current directory).
- Note that there is *no* leading "$" in this case.
- - After proper installation, the default version of UnZip is invoked just
- as in Unix or MS-DOS: "unzip -opts archive files". The hyphen ('-') is
- the switch character, not the slash ('/') as in native VMS commands. An
- alternative is available if VMSCLI is defined during compilation; this
- version does provide a native VMS-style command interface (e.g., /ZIPINFO
- instead of -Z). Both versions accept the command "unzip -v", which can
- be used to check whether VMSCLI was defined or not; but an even simpler
- method is to type "unzip" and look at the help screen. Note that options
- placed in an environment variable (UNZIP_OPTS) must be of the short, hy-
- phenated form regardless of how UnZip was compiled.
- - The VMS C runtime library translates all command-line text to lowercase
- unless it is quoted, making some options and/or filenames not work as
- intended. For example:
- unzip -V zipfile vms/README;*
- is translated to
- unzip -v zipfile vms/readme;*
- which may not match the contents of the zipfile and definitely won't
- extract the file with its version number as intended. This can be
- avoided by use of the -C option (/CASE_INSENSITIVE) or by enclosing
- the uppercase stuff in quotes:
- unzip "-V" zipfile "vms/README;*"
- Note that quoting the whole line probably won't work, since it would
- be interpreted as a single argument by the C library.
- - Wildcards that refer to files internal to the archive behave like Unix
- wildcards, not VMS ones (assuming UnZip was not compiled with VMSWILD
- defined). This is both a matter of consistency (see above) and power--
- full Unix regular expressions are supported, so that one can specify
- "all .c and .h files that start with a, b, c or d and do not have a 2
- before the dot" as "[a-d]*[^2].[ch]". Of course, "*.[ch]" is a much more
- common wildcard specification, but the power is there if you need it.
- Note that "*" matches zipfile directory separators ('/'), too. If UnZip
- *was* compiled with VMSWILD defined (do "unzip -v" to check), the single-
- character wildcard is "%" rather than "?", and character sets (ranges)
- are delimited with () instead of [] (for example, "*.(ch)").
- - Wildcards that refer to zipfiles (i.e., external VMS files) behave like
- normal VMS wildcards regardless of whether VMSWILD was defined or not.
- Ranges are not supported. Thus "unzip *font-%.zip" is about as much as
- one can do for specifying wildcard zipfiles.
- - Created files get whatever permissions were stored in the archive (mapped
- to VMS and/or masked with your default permissions, depending on the
- originating operating system), but created directories additionally in-
- herit the (possibly more restrictive) permissions of the parent directory.
- And obviously things won't work if you don't have permission to write to
- the extraction directory.
- - When transferring files, particularly via Kermit, pay attention to the
- settings! In particular, zipfiles must be transferred in some binary
- mode, which is NOT Kermit's default mode, and this mode must usually be
- set on BOTH sides of the transfer (e.g., both VAX and PC). See the notes
- below for details.
- From Info-ZIP Digest (Wed, 6 Nov 1991), Volume 91, Issue 290:
- Date: Tue, 5 Nov 91 15:31 CDT
- From: Hugh Schmidt <HUGH@macc.wisc.edu>
- ****************************************************
- *** VMS ZIP and PKZIP compatibility using KERMIT ***
- ****************************************************
- Many use Procomm's kermit to transfer zipped files between PC and VMS
- VAX. The following VMS kermit settings make VMS Zip/UnZip compatible
- with PC Zip/UnZip or PKZIP/PKUNZIP:
- VMS kermit Procomm kermit
- ------------------- --------------------
- Uploading PC zipfile to VMS: set file type fixed set file type binary
- Downloading VMS zipfile to PC: set file type block set file type binary
- "Block I/O lets you bypass the VMS RMS record-processing capabilities
- entirely", (Guide to VMS file applications, Section 8.5). The kermit
- guys must have known this!