8
zip, zipcloak, zipnote, zipsplit - package and compress
12
zip [-aABcdDeEfFghjklLmoqrRSTuvVwXyz!@$] [-b path]
13
[-n suffixes] [-t mmddyyyy] [-tt mmddyyyy] [ zipfile [
14
file1 file2 ...]] [-xi list]
16
zipcloak [-dhL] [-b path] zipfile
18
zipnote [-hwL] [-b path] zipfile
20
zipsplit [-hiLpst] [-n size] [-b path] zipfile
23
zip is a compression and file packaging utility for Unix,
24
VMS, MSDOS, OS/2, Windows NT, Minix, Atari and Macintosh,
25
Amiga and Acorn RISC OS.
27
It is analogous to a combination of the UNIX commands
28
tar(1) and compress(1) and is compatible with PKZIP (Phil
29
Katz's ZIP for MSDOS systems).
31
A companion program (unzip(1L)), unpacks zip archives.
32
The zip and unzip(1L) programs can work with archives pro-
33
duced by PKZIP, and PKZIP and PKUNZIP can work with
34
archives produced by zip. zip version 2.3 is compatible
35
with PKZIP 2.04. Note that PKUNZIP 1.10 cannot extract
36
files produced by PKZIP 2.04 or zip 2.3. You must use
37
PKUNZIP 2.04g or unzip 5.0p1 (or later versions) to
40
For a brief help on zip and unzip, run each without speci-
41
fying any parameters on the command line.
43
The program is useful for packaging a set of files for
44
distribution; for archiving files; and for saving disk
45
space by temporarily compressing unused files or directo-
48
The zip program puts one or more compressed files into a
49
single zip archive, along with information about the files
50
(name, path, date, time of last modification, protection,
51
and check information to verify file integrity). An
52
entire directory structure can be packed into a zip
53
archive with a single command. Compression ratios of 2:1
54
to 3:1 are common for text files. zip has one compression
55
method (deflation) and can also store files without com-
56
pression. zip automatically chooses the better of the two
57
for each file to be compressed.
59
When given the name of an existing zip archive, zip will
60
replace identically named entries in the zip archive or
64
Info-ZIP 14 August 1999 (v2.3) 1
73
add entries for new names. For example, if foo.zip exists
74
and contains foo/file1 and foo/file2, and the directory
75
foo contains the files foo/file1 and foo/file3, then:
79
will replace foo/file1 in foo.zip and add foo/file3 to
80
foo.zip. After this, foo.zip contains foo/file1,
81
foo/file2, and foo/file3, with foo/file2 unchanged from
84
If the file list is specified as -@, [Not on MacOS] zip
85
takes the list of input files from standard input. Under
86
UNIX, this option can be used to powerful effect in con-
87
junction with the find(1) command. For example, to
88
archive all the C source files in the current directory
89
and its subdirectories:
91
find . -name "*.[ch]" -print | zip source -@
93
(note that the pattern must be quoted to keep the shell
94
from expanding it). zip will also accept a single dash
95
("-") as the zip file name, in which case it will write
96
the zip file to standard output, allowing the output to be
97
piped to another program. For example:
99
zip -r - . | dd of=/dev/nrst0 obs=16k
101
would write the zip output directly to a tape with the
102
specified block size for the purpose of backing up the
105
zip also accepts a single dash ("-") as the name of a file
106
to be compressed, in which case it will read the file from
107
standard input, allowing zip to take input from another
108
program. For example:
110
tar cf - . | zip backup -
112
would compress the output of the tar command for the pur-
113
pose of backing up the current directory. This generally
114
produces better compression than the previous example
115
using the -r option, because zip can take advantage of
116
redundancy between files. The backup can be restored using
119
unzip -p backup | tar xf -
121
When no zip file name is given and stdout is not a termi-
122
nal, zip acts as a filter, compressing standard input to
123
standard output. For example,
125
tar cf - . | zip | dd of=/dev/nrst0 obs=16k
130
Info-ZIP 14 August 1999 (v2.3) 2
141
tar cf - . | zip - - | dd of=/dev/nrst0 obs=16k
143
zip archives created in this manner can be extracted with
144
the program funzip which is provided in the unzip package,
145
or by gunzip which is provided in the gzip package. For
148
dd if=/dev/nrst0 ibs=16k | funzip | tar xvf -
150
When changing an existing zip archive, zip will write a
151
temporary file with the new contents, and only replace the
152
old one when the process of creating the new version has
153
been completed without error.
155
If the name of the zip archive does not contain an exten-
156
sion, the extension .zip is added. If the name already
157
contains an extension other than .zip the existing exten-
158
sion is kept unchanged.
161
-a [Systems using EBCDIC] Translate file to ASCII for-
164
-A Adjust self-extracting executable archive. A self-
165
extracting executable archive is created by
166
prepending the SFX stub to an existing archive. The
167
-A option tells zip to adjust the entry offsets
168
stored in the archive to take into account this
171
Note: self-extracting archives for the Amiga are a special
172
case. At present, only the Amiga port of Zip is capable
173
of adjusting or updating these without corrupting them. -J
174
can be used to remove the SFX stub if other updates need
177
-B [VM/CMS and MVS] force file to be read binary
180
-Bn [TANDEM] set Edit/Enscribe formatting options with
182
bit 0: Don't add delimiter (Edit/Enscribe)
183
bit 1: Use LF rather than CR/LF as delimiter
185
bit 2: Space fill record to maximum record length
187
bit 3: Trim trailing space (Enscribe)
188
bit 8: Force 30K (Expand) large read for unstruc-
192
Use the specified path for the temporary zip
196
Info-ZIP 14 August 1999 (v2.3) 3
205
archive. For example:
209
will put the temporary zip archive in the directory
210
/tmp, copying over stuff.zip to the current direc-
211
tory when done. This option is only useful when
212
updating an existing archive, and the file system
213
containing this old archive does not have enough
214
space to hold both old and new archives at the same
217
-c Add one-line comments for each file. File opera-
218
tions (adding, updating) are done first, and the
219
user is then prompted for a one-line comment for
220
each file. Enter the comment followed by return,
221
or just return for no comment.
223
-d Remove (delete) entries from a zip archive. For
226
zip -d foo foo/tom/junk foo/harry/\* \*.o
228
will remove the entry foo/tom/junk, all of the
229
files that start with foo/harry/, and all of the
230
files that end with .o (in any path). Note that
231
shell pathname expansion has been inhibited with
232
backslashes, so that zip can see the asterisks,
233
enabling zip to match on the contents of the zip
234
archive instead of the contents of the current
237
Under MSDOS, -d is case sensitive when it matches
238
names in the zip archive. This requires that file
239
names be entered in upper case if they were zipped
240
by PKZIP on an MSDOS system.
242
-df [MacOS] Include only data-fork of files zipped into
243
the archive. Good for exporting files to foreign
244
operating-systems. Resource-forks will be ignored
247
-D Do not create entries in the zip archive for direc-
248
tories. Directory entries are created by default
249
so that their attributes can be saved in the zip
250
archive. The environment variable ZIPOPT can be
251
used to change the default options. For example
254
ZIPOPT="-D"; export ZIPOPT
256
(The variable ZIPOPT can be used for any option
257
except -i and -x and can include several options.)
258
The option -D is a shorthand for -x "*/" but the
262
Info-ZIP 14 August 1999 (v2.3) 4
271
latter cannot be set as default in the ZIPOPT envi-
274
-e Encrypt the contents of the zip archive using a
275
password which is entered on the terminal in
276
response to a prompt (this will not be echoed; if
277
standard error is not a tty, zip will exit with an
278
error). The password prompt is repeated to save
279
the user from typing errors.
281
-E [OS/2] Use the .LONGNAME Extended Attribute (if
284
-f Replace (freshen) an existing entry in the zip
285
archive only if it has been modified more recently
286
than the version already in the zip archive; unlike
287
the update option (-u) this will not add files that
288
are not already in the zip archive. For example:
292
This command should be run from the same directory
293
from which the original zip command was run, since
294
paths stored in zip archives are always relative.
296
Note that the timezone environment variable TZ
297
should be set according to the local timezone in
298
order for the -f , -u and -o options to work cor-
301
The reasons behind this are somewhat subtle but
302
have to do with the differences between the Unix-
303
format file times (always in GMT) and most of the
304
other operating systems (always local time) and the
305
necessity to compare the two. A typical TZ value
306
is ``MET-1MEST'' (Middle European time with auto-
307
matic adjustment for ``summertime'' or Daylight
310
-F Fix the zip archive. This option can be used if
311
some portions of the archive are missing. It is not
312
guaranteed to work, so you MUST make a backup of
313
the original archive first.
315
When doubled as in -FF the compressed sizes given
316
inside the damaged archive are not trusted and zip
317
scans for special signatures to identify the limits
318
between the archive members. The single -F is more
319
reliable if the archive is not too much damaged,
320
for example if it has only been truncated, so try
323
Neither option will recover archives that have been
324
incorrectly transferred in ascii mode instead of
328
Info-ZIP 14 August 1999 (v2.3) 5
337
binary. After the repair, the -t option of unzip
338
may show that some files have a bad CRC. Such files
339
cannot be recovered; you can remove them from the
340
archive using the -d option of zip.
342
-g Grow (append to) the specified zip archive, instead
343
of creating a new one. If this operation fails, zip
344
attempts to restore the archive to its original
345
state. If the restoration fails, the archive might
346
become corrupted. This option is ignored when
347
there's no existing archive or when at least one
348
archive member must be updated or deleted.
350
-h Display the zip help information (this also appears
351
if zip is run with no arguments).
354
Include only the specified files, as in:
358
which will include only the files that end in .c in
359
the current directory and its subdirectories. (Note
360
for PKZIP users: the equivalent command is
364
PKZIP does not allow recursion in directories other
365
than the current one.) The backslash avoids the
366
shell filename substitution, so that the name
367
matching is performed by zip at all directory lev-
372
zip -r foo . -i@include.lst
374
which will only include the files in the current
375
directory and its subdirectories that match the
376
patterns in the file include.lst.
378
-I [Acorn RISC OS] Don't scan through Image files.
379
When used, zip will not consider Image files (eg.
380
DOS partitions or Spark archives when SparkFS is
381
loaded) as directories but will store them as sin-
384
For example, if you have SparkFS loaded, zipping a
385
Spark archive will result in a zipfile containing a
386
directory (and its content) while using the 'I'
387
option will result in a zipfile containing a Spark
388
archive. Obviously this second case will also be
389
obtained (without the 'I' option) if SparkFS isn't
394
Info-ZIP 14 August 1999 (v2.3) 6
403
-j Store just the name of a saved file (junk the
404
path), and do not store directory names. By
405
default, zip will store the full path (relative to
408
-jj [MacOS] record Fullpath (+ Volname). The complete
409
path including volume will be stored. By default
410
the relative path will be stored.
412
-J Strip any prepended data (e.g. a SFX stub) from the
415
-k Attempt to convert the names and paths to conform
416
to MSDOS, store only the MSDOS attribute (just the
417
user write attribute from UNIX), and mark the entry
418
as made under MSDOS (even though it was not); for
419
compatibility with PKUNZIP under MSDOS which cannot
420
handle certain names such as those with two dots.
422
-l Translate the Unix end-of-line character LF into
423
the MSDOS convention CR LF. This option should not
424
be used on binary files. This option can be used
425
on Unix if the zip file is intended for PKUNZIP
426
under MSDOS. If the input files already contain CR
427
LF, this option adds an extra CR. This ensure that
428
unzip -a on Unix will get back an exact copy of the
429
original file, to undo the effect of zip -l.
431
-ll Translate the MSDOS end-of-line CR LF into Unix LF.
432
This option should not be used on binary files.
433
This option can be used on MSDOS if the zip file is
434
intended for unzip under Unix.
436
-L Display the zip license.
438
-m Move the specified files into the zip archive;
439
actually, this deletes the target directories/files
440
after making the specified zip archive. If a direc-
441
tory becomes empty after removal of the files, the
442
directory is also removed. No deletions are done
443
until zip has created the archive without error.
444
This is useful for conserving disk space, but is
445
potentially dangerous so it is recommended to use
446
it in combination with -T to test the archive
447
before removing all input files.
450
Do not attempt to compress files named with the
451
given suffixes. Such files are simply stored (0%
452
compression) in the output zip file, so that zip
453
doesn't waste its time trying to compress them.
454
The suffixes are separated by either colons or
455
semicolons. For example:
460
Info-ZIP 14 August 1999 (v2.3) 7
469
zip -rn .Z:.zip:.tiff:.gif:.snd foo foo
471
will copy everything from foo into foo.zip, but
472
will store any files that end in .Z, .zip, .tiff,
473
.gif, or .snd without trying to compress them
474
(image and sound files often have their own spe-
475
cialized compression methods). By default, zip
476
does not compress files with extensions in the list
477
.Z:.zip:.zoo:.arc:.lzh:.arj. Such files are stored
478
directly in the output archive. The environment
479
variable ZIPOPT can be used to change the default
480
options. For example under Unix with csh:
482
setenv ZIPOPT "-n .gif:.zip"
484
To attempt compression on all files, use:
488
The maximum compression option -9 also attempts
489
compression on all files regardless of extension.
491
On Acorn RISC OS systems the suffixes are actually
492
filetypes (3 hex digit format). By default, zip
493
does not compress files with filetypes in the list
494
DDC:D96:68E (i.e. Archives, CFS files and PackDir
497
-N [Amiga, MacOS] Save Amiga or MacOS filenotes as
498
zipfile comments. They can be restored by using the
499
-N option of unzip. If -c is used also, you are
500
prompted for comments only for those files that do
503
-o Set the "last modified" time of the zip archive to
504
the latest (oldest) "last modified" time found
505
among the entries in the zip archive. This can be
506
used without any other operations, if desired. For
511
will change the last modified time of foo.zip to
512
the latest time of the entries in foo.zip.
516
use password to encrypt zipfile entries (if any).
517
THIS IS INSECURE! Many multi-user operating sys-
518
tems provide ways for any user to see the current
519
command line of any other user; even on stand-alone
520
systems there is always the threat of over-the-
521
shoulder peeking. Storing the plaintext password
522
as part of a command line in an automated script is
526
Info-ZIP 14 August 1999 (v2.3) 8
535
even worse. Whenever possible, use the non-echo-
536
ing, interactive prompt to enter passwords. (And
537
where security is truly important, use strong
538
encryption such as Pretty Good Privacy instead of
539
the relatively weak encryption provided by standard
542
-q Quiet mode; eliminate informational messages and
543
comment prompts. (Useful, for example, in shell
544
scripts and background tasks).
546
-Qn [QDOS] store information about the file in the file
547
header with n defined as
548
bit 0: Don't add headers for any file
549
bit 1: Add headers for all files
550
bit 2: Don't wait for interactive key press on
553
-r Travel the directory structure recursively; for
558
In this case, all the files and directories in foo
559
are saved in a zip archive named foo.zip, including
560
files with names starting with ".", since the
561
recursion does not use the shell's file-name sub-
562
stitution mechanism. If you wish to include only a
563
specific subset of the files in directory foo and
564
its subdirectories, use the -i option to specify
565
the pattern of files to be included. You should
566
not use -r with the name ".*", since that matches
567
".." which will attempt to zip up the parent
568
directory (probably not what was intended).
570
-R Travel the directory structure recursively starting
571
at the current directory; for example:
575
In this case, all the files matching *.c in the
576
tree starting at the current directory are stored
577
into a zip archive named foo.zip. Note for PKZIP
578
users: the equivalent command is
582
-S [MSDOS, OS/2, WIN32 and ATARI] Include system and
584
[MacOS] Includes finder invisible files, which are
588
Do not operate on files modified prior to the
592
Info-ZIP 14 August 1999 (v2.3) 9
601
specified date, where mm is the month (0-12), dd is
602
the day of the month (1-31), and yyyy is the year.
603
The ISO 8601 date format yyyy-mm-dd is also
604
accepted. For example:
606
zip -rt 12071991 infamy foo
608
zip -rt 1991-12-07 infamy foo
610
will add all the files in foo and its subdirecto-
611
ries that were last modified on or after 7 December
612
1991, to the zip archive infamy.zip.
615
Do not operate on files modified after or at the
616
specified date, where mm is the month (0-12), dd is
617
the day of the month (1-31), and yyyy is the year.
618
The ISO 8601 date format yyyy-mm-dd is also
619
accepted. For example:
621
zip -rtt 11301995 infamy foo
623
zip -rtt 1995-11-30 infamy foo
625
will add all the files in foo and its subdirecto-
626
ries that were last modified before the 30 November
627
1995, to the zip archive infamy.zip.
629
-T Test the integrity of the new zip file. If the
630
check fails, the old zip file is unchanged and
631
(with the -m option) no input files are removed.
633
-u Replace (update) an existing entry in the zip
634
archive only if it has been modified more recently
635
than the version already in the zip archive. For
640
will add any new files in the current directory,
641
and update any files which have been modified since
642
the zip archive stuff.zip was last created/modified
643
(note that zip will not try to pack stuff.zip into
644
itself when you do this).
646
Note that the -u option with no arguments acts like
647
the -f (freshen) option.
649
-v Verbose mode or print diagnostic version info.
651
Normally, when applied to real operations, this
652
option enables the display of a progress indicator
653
during compression and requests verbose diagnostic
654
info about zipfile structure oddities.
658
Info-ZIP 14 August 1999 (v2.3) 10
667
When -v is the only command line argument, and std-
668
out is not redirected to a file, a diagnostic
669
screen is printed. In addition to the help screen
670
header with program name, version, and release
671
date, some pointers to the Info-ZIP home and dis-
672
tribution sites are given. Then, it shows informa-
673
tion about the target environment (compiler type
674
and version, OS version, compilation date and the
675
enabled optional features used to create the zip
678
-V [VMS] Save VMS file attributes. zip archives cre-
679
ated with this option will generally not be usable
682
-w [VMS] Append the version number of the files to the
683
name, including multiple versions of files.
684
(default: use only the most recent version of a
688
Explicitly exclude the specified files, as in:
690
zip -r foo foo -x \*.o
692
which will include the contents of foo in foo.zip
693
while excluding all the files that end in .o. The
694
backslash avoids the shell filename substitution,
695
so that the name matching is performed by zip at
696
all directory levels.
700
zip -r foo foo -x@exclude.lst
702
which will include the contents of foo in foo.zip
703
while excluding all the files that match the pat-
704
terns in the file exclude.lst.
706
-X Do not save extra file attributes (Extended
707
Attributes on OS/2, uid/gid and file times on
710
-y Store symbolic links as such in the zip archive,
711
instead of compressing and storing the file
712
referred to by the link (UNIX only).
714
-z Prompt for a multi-line comment for the entire zip
715
archive. The comment is ended by a line containing
716
just a period, or an end of file condition (^D on
717
UNIX, ^Z on MSDOS, OS/2, and VAX/VMS). The comment
718
can be taken from a file:
724
Info-ZIP 14 August 1999 (v2.3) 11
733
-# Regulate the speed of compression using the speci-
734
fied digit #, where -0 indicates no compression
735
(store all files), -1 indicates the fastest com-
736
pression method (less compression) and -9 indicates
737
the slowest compression method (optimal compres-
738
sion, ignores the suffix list). The default com-
739
pression level is -6.
741
-! [WIN32] Use priviliges (if granted) to obtain all
742
aspects of WinNT security.
744
-@ Take the list of input files from standard input.
745
Only one filename per line.
747
-$ [MSDOS, OS/2, WIN32] Include the volume label for
748
the the drive holding the first file to be com-
749
pressed. If you want to include only the volume
750
label or to force a specific drive, use the drive
751
name as first file name, as in:
757
The simplest example:
761
creates the archive stuff.zip (assuming it does not exist)
762
and puts all the files in the current directory in it, in
763
compressed form (the .zip suffix is added automatically,
764
unless that archive name given contains a dot already;
765
this allows the explicit specification of other suffixes).
767
Because of the way the shell does filename substitution,
768
files starting with "." are not included; to include these
773
Even this will not include any subdirectories from the
776
To zip up an entire directory, the command:
780
creates the archive foo.zip, containing all the files and
781
directories in the directory foo that is contained within
782
the current directory.
784
You may want to make a zip archive that contains the files
785
in foo, without recording the directory name, foo. You
786
can use the -j option to leave off the paths, as in:
790
Info-ZIP 14 August 1999 (v2.3) 12
801
If you are short on disk space, you might not have enough
802
room to hold both the original directory and the corre-
803
sponding compressed zip archive. In this case, you can
804
create the archive in steps using the -m option. If foo
805
contains the subdirectories tom, dick, and harry, you can:
809
zip -rm foo foo/harry
811
where the first command creates foo.zip, and the next two
812
add to it. At the completion of each zip command, the
813
last created archive is deleted, making room for the next
814
zip command to function.
817
This section applies only to UNIX. Watch this space for
818
details on MSDOS and VMS operation.
820
The UNIX shells (sh(1) and csh(1)) do filename substitu-
821
tion on command arguments. The special characters are:
823
? match any single character
825
* match any number of characters (including none)
827
[] match any character in the range indicated within
828
the brackets (example: [a-f], [0-9]).
830
When these characters are encountered (without being
831
escaped with a backslash or quotes), the shell will look
832
for files relative to the current path that match the pat-
833
tern, and replace the argument with a list of the names
836
The zip program can do the same matching on names that are
837
in the zip archive being modified or, in the case of the
838
-x (exclude) or -i (include) options, on the list of files
839
to be operated on, by using backslashes or quotes to tell
840
the shell not to do the name expansion. In general, when
841
zip encounters a name in the list of files to do, it first
842
looks for the name in the file system. If it finds it, it
843
then adds it to the list of files to do. If it does not
844
find it, it looks for the name in the zip archive being
845
modified (if it exists), using the pattern matching char-
846
acters described above, if present. For each match, it
847
will add that name to the list of files to be processed,
848
unless this name matches one given with the -x option, or
849
does not match any name given with the -i option.
851
The pattern matching includes the path, and so patterns
852
like \*.o match names that end in ".o", no matter what the
856
Info-ZIP 14 August 1999 (v2.3) 13
865
path prefix is. Note that the backslash must precede
866
every special character (i.e. ?*[]), or the entire argu-
867
ment must be enclosed in double quotes ("").
869
In general, use backslash to make zip do the pattern
870
matching with the -f (freshen) and -d (delete) options,
871
and sometimes after the -x (exclude) option when used with
872
an appropriate operation (add, -u, -f, or -d).
875
ZIPOPT contains default options that will be used when
878
ZIP [Not on RISC OS and VMS] see ZIPOPT
884
[RISC OS] contains extensions separated by a : that
885
will cause native filenames with one of the speci-
886
fied extensions to be added to the zip file with
887
basename and extension swapped. zip
893
compress(1), shar(1L), tar(1), unzip(1L), gzip(1L)
896
The exit status (or error level) approximates the exit
897
codes defined by PKWARE and takes on the following values,
900
0 normal; no errors or warnings detected.
902
2 unexpected end of zip file.
904
3 a generic error in the zipfile format was
905
detected. Processing may have completed
906
successfully anyway; some broken zipfiles
907
created by other archivers have simple work-
910
4 zip was unable to allocate memory for one or
911
more buffers during program initialization.
913
5 a severe error in the zipfile format was
914
detected. Processing probably failed imme-
917
6 entry too large to be split with zipsplit
922
Info-ZIP 14 August 1999 (v2.3) 14
931
7 invalid comment format
933
8 zip -T failed or out of memory
935
9 the user aborted zip prematurely with con-
938
10 zip encountered an error while using a temp
941
11 read or seek error
943
12 zip has nothing to do
945
13 missing or empty zip file
947
14 error writing to a file
949
15 zip was unable to create a file to write to
951
16 bad command line parameters
953
18 zip could not open a specified file to read
955
VMS interprets standard Unix (or PC) return values as
956
other, scarier-looking things, so zip instead maps them
957
into VMS-style status codes. The current mapping is as
958
follows: 1 (success) for normal exit,
959
and (0x7fff000? + 16*normal_zip_exit_status) for all
960
errors, where the `?' is 0 (warning) for zip value 12, 2
961
(error) for the zip values 3, 6, 7, 9, 13, 16, 18, and 4
962
(fatal error) for the remaining ones.
965
zip 2.3 is not compatible with PKUNZIP 1.10. Use zip 1.1
966
to produce zip files which can be extracted by PKUNZIP
969
zip files produced by zip 2.3 must not be updated by zip
970
1.1 or PKZIP 1.10, if they contain encrypted members or if
971
they have been produced in a pipe or on a non-seekable
972
device. The old versions of zip or PKZIP would create an
973
archive with an incorrect format. The old versions can
974
list the contents of the zip file but cannot extract it
975
anyway (because of the new compression algorithm). If you
976
do not use encryption and use regular disk files, you do
977
not have to care about this problem.
979
Under VMS, not all of the odd file formats are treated
980
properly. Only stream-LF format zip files are expected to
981
work with zip. Others can be converted using Rahul
982
Dhesi's BILF program. This version of zip handles some of
983
the conversion internally. When using Kermit to transfer
984
zip files from Vax to MSDOS, type "set file type block" on
988
Info-ZIP 14 August 1999 (v2.3) 15
997
the Vax. When transfering from MSDOS to Vax, type "set
998
file type fixed" on the Vax. In both cases, type "set
999
file type binary" on MSDOS.
1001
Under VMS, zip hangs for file specification that uses DEC-
1002
net syntax foo::*.*.
1004
On OS/2, zip cannot match some names, such as those
1005
including an exclamation mark or a hash sign. This is a
1006
bug in OS/2 itself: the 32-bit DosFindFirst/Next don't
1007
find such names. Other programs such as GNU tar are also
1008
affected by this bug.
1010
Under OS/2, the amount of Extended Attributes displayed by
1011
DIR is (for compatibility) the amount returned by the
1012
16-bit version of DosQueryPathInfo(). Otherwise OS/2 1.3
1013
and 2.0 would report different EA sizes when DIRing a
1014
file. However, the structure layout returned by the
1015
32-bit DosQueryPathInfo() is a bit different, it uses
1016
extra padding bytes and link pointers (it's a linked list)
1017
to have all fields on 4-byte boundaries for portability to
1018
future RISC OS/2 versions. Therefore the value reported by
1019
zip (which uses this 32-bit-mode size) differs from that
1020
reported by DIR. zip stores the 32-bit format for porta-
1021
bility, even the 16-bit MS-C-compiled version running on
1022
OS/2 1.3, so even this one shows the 32-bit-mode size.
1025
Copyright (C) 1990-1997 Mark Adler, Richard B. Wales,
1026
Jean-loup Gailly, Onno van der Linden, Kai Uwe Rommel,
1027
Igor Mandrichenko, John Bush and Paul Kienitz. Permission
1028
is granted to any individual or institution to use, copy,
1029
or redistribute this software so long as all of the origi-
1030
nal files are included, that it is not sold for profit,
1031
and that this copyright notice is retained.
1033
LIKE ANYTHING ELSE THAT'S FREE, ZIP AND ITS ASSOCIATED
1034
UTILITIES ARE PROVIDED AS IS AND COME WITH NO WARRANTY OF
1035
ANY KIND, EITHER EXPRESSED OR IMPLIED. IN NO EVENT WILL
1036
THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DAMAGES RESULTING
1037
FROM THE USE OF THIS SOFTWARE.
1039
Please send bug reports and comments by email to:
1040
zip-bugs@lists.wku.edu. For bug reports, please include
1041
the version of zip (see zip-h ), the make options used to
1042
compile it see zip-v ), the machine and operating system
1043
in use, and as much additional information as possible.
1046
Thanks to R. P. Byrne for his Shrink.Pas program, which
1047
inspired this project, and from which the shrink algorithm
1048
was stolen; to Phil Katz for placing in the public domain
1049
the zip file format, compression format, and .ZIP filename
1050
extension, and for accepting minor changes to the file
1054
Info-ZIP 14 August 1999 (v2.3) 16
1063
format; to Steve Burg for clarifications on the deflate
1064
format; to Haruhiko Okumura and Leonid Broukhis for pro-
1065
viding some useful ideas for the compression algorithm; to
1066
Keith Petersen, Rich Wales, Hunter Goatley and Mark Adler
1067
for providing a mailing list and ftp site for the Info-ZIP
1068
group to use; and most importantly, to the Info-ZIP group
1069
itself (listed in the file infozip.who) without whose
1070
tireless testing and bug-fixing efforts a portable zip
1071
would not have been possible. Finally we should thank
1072
(blame) the first Info-ZIP moderator, David Kirschbaum,
1073
for getting us into this mess in the first place. The
1074
manual page was rewritten for UNIX by R. P. C. Rodgers.
1120
Info-ZIP 14 August 1999 (v2.3) 17
added
removed
zip/zip/MANUAL
