vms_zip.rnh

汇编大全 中国矿业大学计算机学院 汇编实验5

zip file.  The same is true of -u, and hence "zip -u foo" and "zip -f foo"
both do the same thing.
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This command should be run from the same directory from which the original
zip command was run, since paths stored in zip files are always relative.
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Another restriction that can be used with adding, updating, or freshening
is -t (time), which will not operate on files modified earlier than the
specified date.  For example:
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$ zip -rt 120791 infamy [.FOO]*.*
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will add all the files in [.FOO] and its subdirectories that were last
modified on December 7, 1991, or later to the zip file INFAMY.ZIP.
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Also, files can be explicitly excluded using the -x option:
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$ zip -r foo [.FOO] -x *.obj
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which will zip up the contents of [.FOO] into FOO.ZIP but exclude all the
files that end in ".OBJ".
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The last operation is -d (delete) which will remove entries from a zip
file.  An example might be:
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$ zip -d foo foo/harry/*.* *.obj
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which will remove all of the files that start with "foo/harry/" and all of
the files that end with ".OBJ" (in any path).
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Under MSDOS, -d is case sensitive when it matches names in the zip file.
This allows deleting names that were zipped on other systems, but requires
that the names be entered in upper case if they were zipped on an MSDOS
system, so that the names can be found in the zip file and deleted.
.!------------------------------------------------------------------------------
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2 More_Options
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As mentioned before, Zip will use the best of two methods: deflate or store.
The option -0 will force Zip to use store on all files. For example:
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zip -r0 foo foo
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will zip up the directory foo into foo.zip using only store.
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The speed of deflation can also be controlled with options -1 (fastest
method but less compression) to -9 (best compression but slower). The
default value is -5. For example:
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zip -r8 foo foo
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In nearly all cases, a file that is already compressed cannot be compressed
further by Zip, or if it can, the effect is minimal.  The -n option
prevents Zip from trying to compress files that have the
given suffixes.  Such files are simply stored (0%
compression) in the
output zip file, so that Zip doesn't waste its time trying to compress
them. The suffixes are separated by
either colons or semicolons.  For example, in DCL:
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.indent 10;$ zip -rn ".Z:.zip:.tiff:.gif:.snd" foo [.FOO]*.*
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will put everything in [.FOO] into FOO.ZIP, but will store any files that end
in .Z, .ZIP, .TIFF, .GIF, or .SND without trying to compress them.  (Image and
sound files often have their own specialized compression methods.)
The default suffix list is ".Z:.zip;.zoo:.arc:.lzh:.arj".
The environment variable ZIPOPT can be used to change this default. For
example:
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.indent 10;$ ZIPOPT == "-n .Z:.zip:.tiff:.gif:.snd"
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The variable ZIPOPT can be used for any option and can include several
options.
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Under Unix and under OS/2 (if files from a HPFS are stored), Zip will store
the full path (relative to the current path) and name of the file (or just
the name if -j is specified) in the zip file along with the Unix
attributes, and it will mark the entry as made under Unix.  If the zip file
is intended for PKUNZIP under MSDOS, then the -k (Katz) option should be
used to attempt to convert the names and paths to conform to MSDOS, store
only the MSDOS attribute (just the user write attribute from Unix), and
mark the entry as made under MSDOS (even though it wasn't).
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The -o (older) option will set the "last modified" time of the zip file to
the latest "last modified" time of the entries in the zip file.  This can
be used without any other operations, if desired.  For example:
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$ zip -o foo
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will change the last modified time of FOO.ZIP to the latest time of the
entries in FOO.ZIP.
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The -e and -c options operate on all files updated or added to the zip
file.  Encryption (-e) will prompt for a password on the terminal and will
not echo the password as it is typed (if stderr is not a TTY, Zip will exit
with an error). New zip entries will be encrypted using that password.  For
added peace of mind, you can use -ee, which will prompt for the password
twice, checking that the two are the same before using it.
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One-line comments can be added for each file with the -c option.  The zip
file operations (adding or updating) will be done first, and you will then
be prompted for a one-line comment for each file.  You can then enter the
comment followed by return, or just return for no comment.
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The -z option will prompt you for a multi-line comment for the entire zip
file.  This option can be used by itself, or in combination with other
options.  The comment is ended by a line containing just a period, or an
end of file condition (^D on Unix, ^Z on MSDOS, OS/2, and VAX/VMS).
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The -q (quiet) option eliminates the informational messages and comment
prompts while Zip is operating.  This might be used in shell scripts, for
example, or if the zip operation is being performed as a background task
("$ spawn/nowait zip -q foo *.c").
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Zip can take a list of file names to operate on from SYS$INPUT using the
"-@"
option.
.!  In Unix, this option can be used with the find command to extend
.!greatly the functionality of Zip. For example, to zip up all the C source
.!files in the current directory and its subdirectories, you can:
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.!find . -type f -name "*.[ch]" -print | zip source -@
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.!Note that the pattern must be quoted to keep the shell from expanding it.
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Under VMS only, the -w option will append the version number of the files
to the name and zip up multiple versions of files.  Without -w, Zip will
only use the most recent version of the specified file(s).
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One more option that valid only under VMS is -V option. This option saves
all (hopefully) file attributes needed to make EXACT copy of the
file after extraction from archive. To extract a file with saved attributes
use UnZip version 4.2 or later. Note that to specify this option you should
quote it ("-V"). Be carefull: it's rather hard (if possible at all) to extract
a file archived on VMS with this option specified on other systems. See 
documentation on UnZip for further information.
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The -l option translates the Unix end-of-line character LF into the
MSDOS convention CR LF. This option should not be used on binary files.
This option can be used on Unix if the zip file is intended for PKUNZIP
under MSDOS.
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If Zip is run with the -h option, or with no arguments and standard output is
a terminal, the license and the command-argument and option help is shown.
The -L option just shows the license.
.!------------------------------------------------------------------------------
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2 Copyright
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     Copyright (C) 1990,1991 Mark Adler, Richard B. Wales, Jean-loup Gailly,
     Igor Mandrichenko and Kai Uwe Rommel. Permission is granted to any
     individual or institution to use, copy, or redistribute this software
     so long as all of the original files are included, that it is not sold
     for profit, and that this copyright notice is retained.
.!------------------------------------------------------------------------------
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2 Acknowledgements
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     Thanks to R. P. Byrne  for  his  Shrink.Pas  program,  which
     inspired  this  project, and from which the shrink algorithm
     was stolen; to Phil Katz for placing in  the  public  domain
     the  zip  file format, compression format, and .ZIP filename
     extension, and for accepting minor changes to the file  for-
     mat; to Steve Burg for clarifications on the deflate format;
     to Keith Petersen, Rich Wales, Hunter Goatley and Mark Adler
     for  providing  a mailing list and ftp site for the INFO-ZIP
     group to use; and most importantly, to  the  INFO-ZIP  group
     itself  (listed in the file infozip.who) without whose tire-
     less testing and bug-fixing efforts a portable zip would not
     have  been  possible.   Finally  we should thank (blame) the
     first INFO-ZIP moderator, David Kirschbaum, for  getting  us
     into  this  mess  in  the  first place.
.!------------------------------------------------------------------------------
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2 Bugs
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     WARNING: zip files produced by this version of zip must not be
     *updated* by zip 1.0 or pkzip 1.10 or pkzip 1.93a, if they contain
     encrypted members, or if they have been produced in a pipe or on a non
     seekable device. The old versions of zip or pkzip would destroy the
     zip structure. The old versions can list the contents of the zip file
     but cannot extract it anyway (because of the new compression algorithm).
     If you do not use encryption and use regular disk files, you do
     not have to care about this problem.
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     Under VMS, not all of the odd file formats are treated properly.  Only
     zip files of format stream-LF and fixed length 512 are expected to work
     with Zip.  Others can be converted using Rahul Dhesi's BILF
     program.  This version of Zip does handle some of the
     conversion internally.
     When using Kermit to transfer zip files from Vax to MSDOS, type "set
     file type block" on the Vax.  When transfering from MSDOS to Vax, type
     "set file type fixed" on the Vax.  In both cases, type "set file type
     binary" on MSDOS.
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     Under VMS, zip hangs for file specification that uses DECnet
     syntax (foo::*.*).
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     LIKE ANYTHING ELSE THAT'S FREE, ZIP AND ITS ASSOCIATED UTILITIES
     ARE PROVIDED AS IS AND COME WITH NO WARRANTY OF ANY
     KIND, EITHER EXPRESSED OR IMPLIED. IN NO EVENT WILL THE
     COPYRIGHT HOLDERS BE LIABLE FOR ANY DAMAGES RESULTING FROM
     THE USE OF THIS SOFTWARE.
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     That having been said, please send any problems or comments
     via email to the Internet address [e-mail].  For
     bug reports, please include the version of Zip, the make
     options you used to compile it, the machine and operating
     system you are using, and as much additional information as
     possible.  Thank you for your support.
.!------------------------------------------------------------------------------