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echo: arj
to: MAREK ISALSKI
from: CAREY BLOODWORTH
date: 1997-05-15 21:05:00
subject: Lost password 2/2

(Continued from previous message)
       ?   filename of archive when created (null-terminated string)
       ?   archive comment  (null-terminated string)
       4   basic header CRC
       2   1st extended header size (0 if none)
       ?   1st extended header (currently not used)
       4   1st extended header's CRC (not present when 0 extended header 
e)
     Structure of local file header (low order byte first):
     Bytes Description
     ----- 
------------------------------------------------------------------
       2   header id (main and local file) = 0xEA60 or 60000U
       2   basic header size (from 'first_hdr_size' thru 'comment' below)
                 = first_hdr_size + strlen(filename) + 1 + strlen(comment) + 

                 = 0 if end of archive
       1   first_hdr_size (size up to and including 'extra data')
       1   archiver version number
       1   minimum archiver version to extract
       1   host OS   (0 = MSDOS, 1 = PRIMOS, 2 = UNIX, 3 = AMIGA, 4 = MAC-OS)
                     (5 = OS/2, 6 = APPLE GS, 7 = ATARI ST, 8 = NEXT)
                     (9 = VAX VMS)
       1   arj flags (0x01 = GARBLED_FLAG) indicates passworded file
                     (0x02 = RESERVED)
                     (0x04 = VOLUME_FLAG)  indicates continued file to next
                                           volume (file is split)
                     (0x08 = EXTFILE_FLAG) indicates file starting position
                                           field (for split files)
                     (0x10 = PATHSYM_FLAG) indicates filename translated
                                           ("\" changed to "/")
                     (0x20 = BACKUP_FLAG)  indicates file marked as backup
       1   method    (0 = stored, 1 = compressed most ... 4 compressed 
fastest)
       1   file type (0 = binary, 1 = 7-bit text)
                     (3 = directory, 4 = volume label)
       1   value used to xor against password
       4   date time modified
       4   compressed size
       4   original size (this will be different for text mode compression)
       4   original file's CRC
       2   filespec position in filename
       2   file access mode
       2   host data (currently not used)
       ?   extra data
           4 bytes for extended file starting position when used
           (this is present when EXTFILE_FLAG is set)
       ?   filename (null-terminated string)
       ?   comment  (null-terminated string)
       4   basic header CRC
       2   1st extended header size (0 if none)
       ?   1st extended header (currently not used)
       4   1st extended header's CRC (not present when 0 extended header 
ze)
       ...
       ?   compressed file
     Time stamp format:
        31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
       ||||
        15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
       ||||
     Compression methods:
     ARJ methods 1 to 3 use Lempel-Ziv 77 sliding window with static Huffman
     encoding.
     ARJ method 4 uses Lempel-Ziv 77 sliding window with pointer/length
     unary encoding.
     There is one decoder for methods 1 to 3 and one decoder for method 4.
     Encryption technology:
     ARJ does NOT use DES encryption algorithms.  It uses a combination of
     simple exclusive-or operations.
     Text mode processing:
     As of ARJ 2.30 and UNARJ 2.30, files archived with the -t1 option
     will not have the 8th bit stripped unless the file is extracted to
     a different platform than the original one.  Therefore, it is now
     possible to use ARJ to compress 8-bit text files in text mode and
     extract them back in 8-bit mode.
     end of document
--- QScan/PCB v1.19b / 01-0162
---------------
* Origin: Jackalope Junction 501-785-5381 Ft Smith AR (1:3822/1)

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