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1985-11-20
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This is my plea for contributions to compensate for the time
and effort to continue development of ST_UNZIP. I have a
wife, three children, pay child support for children from
a previous marriage, and hold a regular job.
Right now this program is mainly used by users of
PC-DITTO to extract files faster than PKUNZIP can while
running under PC-DITTO.
I would like to integrate ST_UNZIP into an integrated
program that will ZIP and UNZIP files on the Atari ST.
Registered users will automatically receive news of
version changes. If they then send a blank disk or
the equivalent of $3.00 US dollars, I will send the
latest version and documentation.
The sugested contribution is the equivalent of $10.00
(US dollars). Deutsch marks, francs, roubles, or
other monetary units are welcome.
Send to:
Arthur Cravener
1256 Church Street
Reading, PA 19601
U.S.A.
Thank-you and I hope you find this program useful.
=====================================================
ST_UNZIP...a ZIP file extraction utility for the Atari ST.
version 2.70
11/24/89
EXTRACTING A ZIP FILE
This section will describe some simple examples, illustrating
the command format for extracting files from a ZIP file.
||============================================================||
|| ||
|| ||
|| How to Extract a ZIP file ||
|| ||
|| A ZIP file is one which holds much information in a ||
|| greatly reduced space. Use the ST_UNZIP program to ||
|| extract compressed files from a ZIP file. An entire ZIP ||
|| file can be extracted, or a specific file can be ||
|| delegated to be extracted. ||
|| ||
|| There are four main parameters on the ST_UNZIP command: ||
|| ||
|| 1. The command options | letter commands ||
|| | example: -v=view files ||
|| ||
|| 2. The ZIP file name | zipfile.zip ||
|| ||
|| 3. Selected file to be extracted | foo.txt ||
|| ||
|| 4. The destination where you want| Default = directory ||
|| the extracted information to | where program is started||
|| be located (optional) | ||
|| ||
|| Examples: ||
|| ||
|| x zipfile.zip A:\ ||
|| ||
|| This command will extract all the files in the ZIP file ||
|| zipfile.zip. It will locate extracted files to the A ||
|| drive. ||
|| ||
|| ||
|| i A:\zipfile.zip foo.c ||
|| ||
|| In this example the ZIP file located in the A drive will ||
|| be extracted to the drive and/or folder ST_UNZIP is run ||
|| from, this is the default. Only the foo.c file will be ||
|| extracted. ||
|| ||
|| xo \collect\zipfile.zip A:\ ||
|| ||
|| In this example, the path location of the ZIP file is ||
|| specified. The files will be extracted to the A drive. ||
|| With the 'xo' option, any file on the A drive with the same||
|| name will be overwritten _without_ asking for user ||
|| confirmation. ||
||============================================================||
ST_UNZIP GUIDE
The following table will provide a quick guide to all of
the options of ST_UNZIP. The command syntax is also shown
below.
||==============================================================||
|| ||
|| ST_UNZIP ||
|| ||
|| ST_UNZIP [options] zipfile [d:path\] [file...] ||
|| ||
|| zipfile = ZIP file name. Default extension is .zip ||
|| file = Names of files to compress. Wildcards *, ? are ok.||
|| Default is ALL files. ||
|| list = An optional list file name. ||
|| ||
|| ||
|| Options are: ||
|| c[m]= extract a file to screen ||
|| m = extracts a screen-full at a time ||
|| and more ||
|| i[o]= extract individual file to disk ||
|| p = extract a text file to printer ||
|| v = verbose list to screen ||
|| o = overwrite existing files: ||
|| x[o]= extract all files from zipfile ||
|| t = test zipfile crc integrity ||
||==============================================================||
DESCRIPTION OF COMMAND OPTIONS
The command options used in extracting a ZIP file will be
explained in detail in this section.
- The command options must be the first parameter on the
command line.
- The first filename listed on the command line will be
interpreted as the ZIP file to be extracted. When using
the 'i' option, the next filename will be interpreted as
the specific file to be extracted from the zipfile.
- The command can be typed using either upper case, lower
case, or any combination.
- All command options can be preceded by a '-' character
(i.e. -v). At present there is no need to use this
character. This flag will be used in future versions
of ST_UNZIP.
- Unrelated options of ST_UNZIP cannot be combined.
- The default values for the command line are as follows:
1. If no extension is specified for the ZIP file the .zip
extension is assumed.
2. If no destination is specified for the extracted files, they
will be located in directory that the program is being run
from.
3. If no file specs (filenames without wildcards) are
listed, the default is all(*.*).
The following table lists all the options valid with the
PKZIP command. A brief summary is also given in the table. The
options are explained in detail, along with programming examples,
following the table.
Table 1 ST_UNZIP Command Options
==============================================================
OPTION SUMMARY
-c[m] Extracts a particular file to the console or
with 'm' option extracts to console a screen
full at a time, and more.
-i[o] Extract a particular file to disk.
-p Extracts a particular text file to a printer.
-v Verbose/views technical information about
files in the ZIP.
-x[o] Extracts files from the ZIP file.
o Overwrite existing files:
Used along with either 'x' or 'i' option.
-t reads each file in zipfile then calculates
the CRC value. displays (OK!) if crc good,
and displays actual and "should be" values.
Notes: Parameters listed in [ ] are optional.
o Overwrites existing files without asking for
user confirmation.
================================================================
This section will give a detailed explanation of the command
options used in the ST_UNZIP command.
The command options are explained in groups determined by
function. The options pertaining to extracting ZIP files are
explained first, followed by the view options, print options, and
miscellaneous options.
-x Extract files from a ZIP file
This command will extract all files from a ZIP file.
The extracted files will be located in the current
directory unless you specify a destination. The -x option
is the default option for the ST_UNZIP command. If no
option is listed on the command -x will be assumed.
If a file being extracted already exists at the same
destination where the extracted files are being located, the
program will prompt you for confirmation before it overwrites the
existing file.
Example: C:\DB\ST_UNZIP -x A:lists.zip
In the above example, all of the files will be extracted
from the ZIP file called 'lists'. The ZIP file is located on
the A drive, they will be extracted to the C:\DB\ directory.
If files in 'lists.zip' already exists at 'C:\DB\', the
program will prompt you for confirmation before it overwrites
the existing file.
============================================================
-xo Extracts files from ZIP file and overwrite existing files
on disk.
This command will extract files from a ZIP file and
automatically overwrite any same-named files found at the
destination where the extracted files are being located. The
program will NOT prompt you for confirmation before overwriting
these files.
The extracted files will be located in the current directory
unless you specify a destination.
Example: C:ST_UNZIP -xo zipfile
In the above example, all files will be extracted
from the ZIP file called 'zipfile' (the .zip extension is
assumed). As the files are being extracted any file with
the same name in the current directory (C:) will be
overwritten.
============================================================
-i Extract an individual file from a ZIP file
This command will extract an individual file from a ZIP
file. The extracted file will be located in the current
directory unless you specify a destination.
If a file being extracted already exists at the same
destination where the extracted files are being located, the
program will prompt you for confirmation before it overwrites
the existing file.
Example: C:ST_UNZIP -i zipfile stuff.exe E:\foo\
In the above example, the 'stuff.exe' file will be extracted
from the ZIP file called 'zipfile' (the .zip extension is
assumed). The file will be extracted to the 'E:\foo\' directory.
If 'stuff.exe' already exists at 'E:\foo\', the program will
prompt you for confirmation before it overwrites the existing file.
============================================================
-io Extract an individual file from ZIP file and overwrite
any existing file with same name.
This command will extract an individual file from a ZIP
file and automatically overwrite any same-named file found. The
program will NOT prompt you for confirmation before overwriting
this file.
The extracted file will be located in the current directory
unless you specify a destination.
Example: C:ST_UNZIP -xo zipfile stuff.exe
In the above example, the 'stuff.exe' file will be extracted
from the ZIP file called 'zipfile' (the .zip extension is
assumed). As the file is being extracted any file with
the same name in the current directory (C:)will be
overwritten.
============================================================
-c Extract files from a ZIP file and display them on the
screen
This command will extract files from a ZIP file and display
them on the monitor. The extracted files will scroll
continuously on the screen.
Example: A:ST_UNZIP -c d:\schedule\zipfile dates.doc
In this example, the file 'dates.doc' will be extracted from
the 'zipfile' file in directory 'd:\schedule\' and displayed on
the screen and scroll continuously.
-cm Lists all files in ZIP file and steps through them one at
a time prompting for action
This commmand will list all files, step through them, and
prompt for (N)ext (V)iew (R)elist/(O)ne (Q)uit.
Example: C:ST_UNZIP -cm e:\temp\zipfile
The above example will list the contents of 'zipfile'.
After the listing each file will be stepped to and a
menu of commands will be provided. If you select (N)ext,
the next file in the 'zipfile' will be the choice for action.
If you choose to (V)iew a file, the first display will be a
screen-full of the selected file. You will then be prompted
for "More: (Y)es, (N)o, (C)ontinuous?". Selecting
(Y)es will display another screen full of text. Selecting
(N)o will abort the (V)iew action on the present file and
skip to the next file in the "zipfile".
If the selection is (C)ontinuous, the file selected will
scroll continuously. You can pause the display by using
[Control-s]:(hold the 'Control' key down and press 's'),
to resume the display hit [Control-q].
After the initial detailed verbose listing, the display
defaults to an alphabetical list of filenames only. You can
use the (R)elist command to redisplay the detailed verbose
listing. You can also call up an individual file and view
its detailed verbose information by using the (O)ne command
selection. Selecting (O)ne will display: (N)ext (V)iew
(M)ain menu. The (N)ext command will allow you to skip
to the particular file you wish detailed verbose information
on. When you get to the file name you wish to examine,
selecting (V)iew will display detailed verbose information
about that file only. Selecting (M)ain menu returns you to
the command line prompt: (N)ext (V)iew (R)elist/(O)ne (Q)uit.
Non-text files will not be displayed.
============================================================
-v Verbose\view technical information
This option will display technical information concerning the
files contained within a ZIP file.
The following information about each file in the ZIP file
will be displayed (scrolled) on the screen.
Name Name of the file
Length Original length of the file
Stowage Type of file compression used, Implode or
Shrink, (or Reduce if an older version of
PKZIP was used)
SF Percent reduction in file size
Size Size of the compressed file
Date Actual date of the file
Time Actual time of the file
CRC-32 The CRC-32 value of the file
============================================================
-p Extract a particular text file to a printer
This option is used to extract files from a ZIP file and send
the output to a printer.
Example: C:ST_UNZIP -p zipfile.zip stuff.doc
In the above example, the 'stuff.doc' file will be extracted
from 'zipfile.zip' to the printer.
============================================================
-t Tests the CRC integrity of all files in a zipfile
This options reads the zipfile registered CRC value then
calculates the files actual CRC value. If the two values match,
an "OK!" is displayed, if they do not match, a bell is sounded
and an error message is displayed for the particular file with
the error.
============================================================================
The End
