Shareware Game Pak for Windows

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PKZIP, PKUNZIP and PKSFX Version 1.1 includes several new features. They are described in this addendum to the PKZIP, PKUNZIP and PKSFX Version 1.0 manual. PKZIP The following new features have been incorporated into the PKZIP Version 1.1 software release. -3 Disable 80386 instruction usage ----------------------------------- This option is available for users with 80386 type computers. It is used to turn OFF the added 80386 instructions or registers. When these instructions are available, PKZIP will utilize them to allow the program to function even faster. However, if you are running a different program that may conflict with use of the 80386 instructions, you can disable them by using this command. The 80386 instructions will be disabled only for the current PKZIP operation. They will then be enabled immediately after the command operation is completed. C:\PKWARE> PKZIP FILES.ZIP -3 -a *.DOC In the above example, all of the *.DOC files in the current directory will be added to the ZIP file, FILES.ZIP. The 80386 instructions will be disabled while the command is being executed. You can also disable the 80386 instructions when you start PKZIP by using the PKNO386 environment variable. To set the environment variable, type PKNO386=xxxx, where "xxxx" is any string you choose. If the string PKNO386 is present in the environment, then PKZIP (and PKUNZIP) will not use the 80386 instructions or registers. To enable the 80386 instructions after they have been disabled, type SET PKNO386=<Enter>, where <Enter> refers to the Enter key. NOTE: Disabling the 80386 usage will make PKZIP run up to twenty percent slower than if the 80386 instructions are used. PKWARE Version 1.1 Addendum 1 -^ Echo the command line ------------------------- This command is used to display the PKZIP command that you entered on the console. It is useful for example, when you are using the View file option; the file specifications that you entered will be echoed on the console along with the command output. E:\> PKZIP docs.zip -vd -^ *.doc In this example, technical information about all of the *.doc files included in the DOCS.ZIP ZIP file will be displayed. The information will be sorted by date, and the command line will be redisplayed on the screen above the output. -x@file Exclude list file -------------------------- This option is used to exclude a List File from the current operation. Recall that a List File is a file containing a list of files that are grouped together. List Files can be used with all the PKZIP and PKUNZIP command options. They are always preceded by the @ symbol on the command line. This command can be useful when you want to exclude a few files from an operation and the DOS wild cards cannot be used effectively. C:\ACTNG> PKZIP STORE *.* -x@ACCOUNTS.LIS In the above example, all of the files in the current directory, except for the List File, ACCOUNTS.LIS, will be compressed into the ZIP file STORE.ZIP. -$[d] Save volume label ------------------------- This command is used to save the volume label of a specific drive along with the ZIP file. The default drive is the current drive, unless another is specified. The drive letter is not saved in the ZIP file, only the volume label. C:\ACCTNG> PKZIP FILES.TAX -a -$ *.* In the above example, all of the files in the current directory will be compressed into the ZIP file, FILES.TAX. They will be stored along with the volume label for the C: drive. PKWARE Version 1.1 Addendum 2 -t ZIP only files with a date equal to or later than specified --------------------------------------------------------------- With this option, you can specify a date so that only files with a date that is equal to or more recent than the date specified will be included in the PKZIP operation. If no date is specified, today's date will be used by default. When specifying a date, use six digits in the following format: mmddyy. For example, February 14, l990 will be listed: -t021490. This is true for all computers setup as American. If your computer is setup as European, use the following format: ddmmyy. If your computer is setup as Japanese, use the following format: yymmdd. If you are not sure how your computer is setup, consult your user's manual. C:\BACKUP> PKZIP BAKS.ZIP -t010190 In this example, all files in the current directory with a date later than or equal to January 1, l990 will be compressed into the ZIP file, BAKS.ZIP. -ei Implode files only ------------------------ This option is used along with the mini-PKSFX program, PKSFXjr. Only files that have been imploded can be extracted with PKSFXjr. Shrunk files cannot be extracted. In order to create a PKSFXjr.EXE file, this option must be used. E:\BATS> PKZIP EXT.ZIP -ei In this example, all of the files in the current directory will be compressed into the ZIP file, EXT.ZIP. All of the files will be imploded. PKZIP Configuration File ------------------------ The PKZIP Configuration file can be used to set parameters to values other than the normal default values. There are three additional Configuration file options available. They are explained on the following page. PKWARE Version 1.1 Addendum 3 SHRINK > nnnnn Where nnnn is some number specifying that files that are greater than this number are to be Shrunk. This option is used to save time when you are compressing large files. Typically, large files take longer to compress when the imploding method is used. LISTCHAR= This option is used to designate a special character to be used to indicate a List file. By default the @ character is used, as in @FILE. If you want to use @ as the first character in a file name, you can designate an alternate character to be used to indicate List files. For example, you could use the # or the % characters. OPTIONCHAR= This option is used to designate a special character to be used to indicate a command on the command line. By default, the minus sign - is used. If you want to use the minus sign as the first character in a file name, you can designate an alternate character to be used to indicate a command. For example, you could use the / character. Also, PKZIP 1.1 will now search for the Configuration file in the following order: 1. In the current directory. 2. In the path specified by the PKZIP.CFG= environment variable. 3. In the path where PKZIP was started from, if DOS version greater than or equal to 3.x is being used. Additional Error Code --------------------- There is an additional error code available with PKZIP version 1.1. PKZIP will exit with an errorlevel of 18 when it is unable to open one or more specified files. It should be noted that this is a "warning" condition only, and otherwise PKZIP was able to construct the ZIP file without any errors. NOTE: There is no longer a 3900 file limit with PKZIP. The total number of files that can be processed is limited only by the memory available in the system you are using. Approximately 8000 files can be compressed in a ZIP file with 500K+ of memory free. PKWARE Version 1.1 Addendum 4 Authenticity Verification ------------------------- -! Encrypt authenticity verifiable data into the .ZIP file. This feature allows you to create ZIP files that PKUNZIP or PKSFX can test for authenticity while extracting, providing for detection of tampered, hacked, or virus infected files. To use this feature, you need to be a registered user of the software, and mail the form AUTHVERI.FRM to PKWARE. PKWARE will then send you a postcard listing your name or the name of your company, and a unique serial number. You must then use the PUTAV.EXE program included with the PKWARE program files to install this information. To do this, use the following steps. Step 1. Type PUTAV. Make sure that PKZIP.EXE is also in the current directory when you do this. The program will then prompt you to enter your company name. Step 2. Enter your name or the name of the company the software is registered to. Enter it the same as it appears on the postcard that PKWARE sent. Press the Enter key when you are done. Step 3. Enter the serial number at the prompt. Then press the Enter key. After successfully completing the above steps, "Serial number installation complete" will appear on the screen. Your name and unique serial number will then be encrypted in the program. To use this option, include -! on the PKZIP command line. When you then extract or test a file using PKUNZIP, it will automatically be verified for authenticity. An example is shown below. D:\> PKZIP -! ALL.ZIP *.* In this example, all of the files in the current directory will be ZIPPED into a file called ALL.ZIP, and they will include the Verify Authenticity option. When this file is UNZIPPED using PKUNZIP, a message will appear stating the authenticity has been checked. NOTE: The authenticity verification feature is available in the U.S.A. and Canada only. File encryption and authenticity verification is not available in export versions of the software. PKWARE Version 1.1 Addendum 5 PKUNZIP The following new features have been incorporated into the PKUNZIP Version 1.1 software release. -3 Disable 80386 instruction usage ----------------------------------- This option is available for users with 80386 type computers. It is used to turn OFF the added 80386 instructions or registers. When these instructions are available, PKUNZIP will utilize them to allow the program to function even faster. However, if you are running a different program that may conflict with the use of the 80386 instructions, you can disable them by using this command. The 80386 instructions will be disabled only for the current PKUNZIP operation. They will be enabled immediately after the command operation is completed. C:\PKWARE> PKUNZIP -3 COMP.ZIP DAT*.* In the above example, all of the DAT*.* files in the ZIP file COMP.ZIP will be extracted. The 80386 instructions will be disabled while the command is being executed. You can also disable the 80386 instructions when you start PKUNZIP by using the PKNO386 environment variable. To set the environment variable, type PKNO386=xxxx, where "xxxx" is any string you choose. If the string PKNO386 is present in the environment, then PKUNZIP will not use the 80386 instructions or registers. To enable the 80386 instructions after they have been disabled, type SET PKNO386=<Enter>, where <Enter> refers to the Enter key. NOTE: Disabling the 80386 usage will make PKUNZIP run up to forty percent slower than if the 80386 instructions are used. PKWARE Version 1.1 Addendum 6 -^ Echo the command line ------------------------- This command is used to display the PKUNZIP command that you entered on the console. It is useful for example, when you are using the View file option. It allows the file specifications that you entered to be echoed on the screen along with the command output. E:\> PKUNZIP -^ -vn MAY.ZIP In this example, technical information about all of the files included in the MAY.ZIP ZIP file will be displayed. The information will be sorted by name in ascending order, and the command line will be redisplayed on the screen above the output. -$ Restore volume label ------------------------- This command is used to restore any volume label that has been stored in the ZIP file. It is important to remember that the PKZIP command used to save a volume label does not store a drive letter along with the label. Upon extraction, the volume label will be assigned to the extract drive. C:\> PKUNZIP stuff -$ d:\misc In the above example, all of the files STUFF.ZIP will be extracted to the D:\MISC\ directory, and the volume label for drive D: will be reset to the one contained in STUFf.ZIP. -f Freshen files in extract directory --------------------------------------- This function is the inverse of the Freshen option in PKZIP. When this option is used, files will be extracted from the ZIP file if and only if: a) the files already exist in the target extract directory, AND b) the files in the ZIP file are newer then the files in the extract directory. D:\MISC> PKUNZIP -f files.zip a: In this example, only those files that meet both of the above criteria will be extracted to the A: drive. PKWARE Version 1.1 Addendum 7 -x or -e[c,d,e,n,p,s] Extract files in designated order -------------------------------------------------------- The above option is used to specify a particular order in which to extract files from a ZIP file. These options are used along with -x or -e, the default PKUNZIP extract option. All of the options are defined below. -xc or -ec Extract files in order of CRC value -xd or -ed Extract files in order of date -xe or -ee Extract files in alphabetical order by extension -xn or -en Extract files in alphabetical order by file name -xp or -ep Extract files in order of percentage (ratio) of compression -xs or -es Extract files in order by size NOTE: Future versions of PKUNZIP will only support the -e option and support of the -x option will be discontinued in future versions of PKUNZIP. C:\ZIPS> PKUNZIP -en -cm keep.zip In this example, all of the files in KEEP.ZIP will be extracted to the monitor in alphabetical order. ZIP2EXE ZIP2EXE no longer requires external PKSFX.PRG files. There are new command line features available with version 1.1 of the ZIP2EXE program. The features available depend on whether you are using the MS-DOS or OS/2 versions of the sofware. ZIP2EXE MS-DOS version -j Use PKFSXjr program ZIP2EXE OS/2 version -f Use PKSFX family mode program ZIP2EXE -j Use the PKSFXjr program This option is available only if you have the MS-DOS software version. If the -j option is specified, the mini version, PKSFXjr, will be used. For details on this option, see the section on PKSFXjr on page 10. If this option is not specified, the ZIP2EXE program will utilize the standard PKSFX program. PKWARE Version 1.1 Addendum 8 ZIP2EXE -f Create family mode self-extracting file This option is used when you are using the OS/2 software version. It specifies that an OS/2 family mode .EXE file is to be created, which will run under OS/2 and MS-DOS. If this option is not included on the command line, the software will create an OS/2 protected mode .EXE file. PKSFX -s<password> Support password decryption ------------------------------------------------- PKSFX now supports the -s<password> decryption option. This option functions the same as with the PKUNZIP option. When unzipping a ZIP file, including a self-extracting ZIP file, that has been encrypted, the files cannot be extracted unless the correct password is specified on the command line. When specifying the password, there is no space between the s and the password. Also, the password is case sensitive. Recall, it is important that you remember or somehow record the passwords that you use, because PKWARE does not retain a record of these passwords anywhere. D:\> a:files -sCode b: In the above example, the self-extracting ZIP file, FILES.EXE, will be extracted to the B: drive if the correct password for the file is Code. PKSFX Confirm before extracting files --------------------------------------- If the ZIP comment for a file contains a Ctrl-S (0x13), PKSFX will display the ZIP comment followed by this statement: "Do you want to extract these files now (y/n)?" After viewing the ZIP comment, you can decide if you actually want to extract these particular files. Press Y to extract the files. Press N to abort the PKSFX process. If the process is aborted, PKSFX will exit with with an ErrorLevel of 12. The Ctrl-S character string will not be displayed in the ZIP comment. PKWARE Version 1.1 Addendum 9 PKSFXjr ------- This is a mini-PKSFX program. You can create a self- extracting ZIP file with it by using the -j option on the command line when running the ZIP2EXE version 1.1 program. An example is shown below. C:\MISC> ZIP2EXE -j miscfile.zip PKSFXjr includes the following features. - PKSFXjr is only 2936 bytes in size. - PKSFXjr also supports the comment pausing feature added to the standard PKSFX program. For details on this feature, see the explanation above. - PKSFXjr will extract all of the files in the self-extracting ZIP file. Individual file names cannot be specified. - The only PKUNZIP command line option supported by PKSFXjr is the -o Overwrite option. - A maximum of approximately 500 files can be contained within a PKSFXjr.EXE file. However, there is no limit on the overall size of the .EXE file that can be created with PKSFXjr. - PKSFXjr only supports the Exploding of files. Files that have been compressed using the Shrinking method will not be extracted. In order to create a PKSFXjr.EXE file, the -ei Implode only option of PKZIP must be used. - PKSFXjr requires only about 32K of memory to run. - PKSFXjr has the following ErrorLevel exit codes: 1. Warning error (failed CRC etc.) 2. Can't find .EXE file 3. Error in .EXE file 4. File has a bad table 5. Can't create file 6. Disk full 7. Too many files 8. User aborted at comment pausing PKWARE Version 1.1 Addendum 10