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