AAARRRCCC(((111LLL)))                LLLooocccaaalll (((111222 JJJuuunnn 111999888888)))                AAARRRCCC(((111LLL)))     NNNAAAMMMEEE          arc - pc archive utility     SSSYYYNNNOOOPPPSSSIIISSS          aaaarrrrcccc a|m|u|f|d|x|e|r|p|l|v|t|c [ biswnoq ] [ g_p_a_s_s_w_o_r_d ]          _a_r_c_h_i_v_e [ _f_i_l_e_n_a_m_e ...]     DDDEEESSSCCCRRRIIIPPPTTTIIIOOONNN          _A_r_c is a general archive and file compression utility, used          to maintain a compressed archive of files.  An _a_r_c_h_i_v_e is a          single file that combines many files, reducing storage space          and allowing multiple files to be handled as one.  _A_r_c uses          one of several compression methods for each file within the          _a_r_c_h_i_v_e, based on whichever method yields the smallest          result.     IIINNNSSSTTTRRRUUUCCCTTTIIIOOONNNSSS          Execute _a_r_c with no arguments for fairly verbose, usable          instructions.     CCCOOOMMMMMMAAANNNDDD SSSWWWIIITTTCCCHHHEEESSS          a  add files to archive.  Copies the indicated files to the             archive.          m  move files to archive.  Same as 'a' switch except that             the files are deleted from the directory as they are             moved to the archive.          u  update files in archive.  This switch will replace             archived files when the named file is newer than the             archived copy.  New files will be added automatically.          f  freshen files in archive.  Same as 'u' except that new             files will not be added.          d  delete files in archive.  The named files are removed             from the archive.          x,e             extract files from archive.  The named files are             extracted from the archive and created in the current             directory in an uncompressed state.          r  run one file with arguments from archive.  Any program             may be executed directly from the archive.  The             parameters given after the program name are passed to the             program without modification.          p  copy files from archive to standard output.  Useful with             I/O redirection. A form-feed is appended after each file,             to ease use with printers.     Page 1                                           (printed 8/1/88)     AAARRRCCC(((111LLL)))                LLLooocccaaalll (((111222 JJJuuunnn 111999888888)))                AAARRRCCC(((111LLL)))          l  list files in archive.  Limited information listing of             files contained in an archive.  Displays the filename,             original length, and date last modified.  If the 'n'             option (see below) is used, only the filename is             displayed.          v  verbose listing of files in archive.  Complete             information listing of files contained in an archive.             Displays the filename, original length, storage method,             storage factor (% savings), compressed size, date, time,             and CRC.          t  test archive integrity.  Computes CRC values for each             member of the archive and compares against the previously             saved value.          c  convert entry to new packing method.  Convert files             stored with older methods to newer methods that are more             efficient. Also useful for files previously archived with             the 's' option.     OOOPPPTTTIIIOOONNNSSS          b  retain backup copy of archive.  Keep the original archive             file and rename to .BAK.  This switch may be used with             the following commands:  a, m, u, f, d, c.          i  suppress image mode.  This switch causes files to be             treated as text files, and will translate their end-of-             line sequence. (Unix's '\n' vs. '\r\n' used on many other             systems.)  The default is to perform no translation when             compressing or extracting files.  This option makes             dealing with text files much nicer, though the 'tr'             command can also be used. ('\r' in makefiles and C source             code is such a nuisance...)          s  suppress compression.  This forces new files to be saved             using Method 2 (no compression).  This switch may be used             with the following commands:  a, m, u, f, c.          w  suppress warning messages.  This switch will keep warning             messages from being displayed which is the default.  Most             warnings concern the deletion or existence of files with             the same name.          n  suppress notes and comments.  This switch will keep             useful notes from being displayed which is the default.             Most notes indicate what stage of compression is being             run (analyze, compaction, storage).          o  overwrite existing files when extracting.  This switch             will make existing files silently get overwritten,             instead of asking for confirmation, which is the default.     Page 2                                           (printed 8/1/88)     AAARRRCCC(((111LLL)))                LLLooocccaaalll (((111222 JJJuuunnn 111999888888)))                AAARRRCCC(((111LLL)))          q  force Squash compression method.  This switch causes the             Squash compression method to be used, instead of Crunch,             which is the default.          g  encrypt/decrypt archive entry.  This is used to encode             files so that others may not read them.  BE CAREFUL!             This must be the last parameter in the switches because             everything following is part of the password.     PPPRRROOOGGGRRRAAAMMMMMMIIINNNGGG NNNOOOTTTEEESSS          _A_r_c Version 2 differs from version 1 in that archive entries          are automatically compressed when they are added to the          archive, making a separate compression step unecessary.  The          nature of the compression is indicated by the header version          number placed in each archive entry, as follows:                   1 = Old style, no compression                   2 = New style, no compression                   3 = Compression of repeated characters only                   4 = Compression of repeated characters plus Huffman SQueezing                   5 = Lempel-Zev packing of repeated strings (old style)                   6 = Lempel-Zev packing of repeated strings (new style)                   7 = Lempel-Zev Williams packing with improved hash function                   8 = Dynamic Lempel-Zev packing with adaptive reset                   9 = Squashing          Type 5, Lempel-Zev packing, was added as of version 4.0          Type 6 is Lempel-Zev packing where runs of repeated          characters have been collapsed, and was added as of version          4.1          Type 7 is a variation of Lempel-Zev using a different hash          function which yields speed improvements of 20-25%, and was          added as of version 4.6          Type 8 is a different implementation of Lempel-Zev, using a          variable code size and an adaptive block reset, and was          added as of version 5.0          Type 9 is another variation of Lempel-Zev, using a larger          hash table. This method was developed by Phil Katz, and is          not supported by the "official" AAAARRRRCCCC programs.          _A_r_c will look for environment variables named _A_R_C_T_E_M_P or          _T_M_P_D_I_R, which, if present, indicates the pathname where          temporary files should be created. This is typically the          location of a RAMdisk on a microcomputer, "/tmp/" or left          unset.          See the included documentation file for more details.     HHHIIISSSTTTOOORRRYYY     PPPaaagggeee 333                                           (((ppprrriiinnnttteeeddd 888///111///888888)))     AAARRRCCC(((111LLL)))                LLLooocccaaalll (((111222 JJJuuunnn 111999888888)))                AAARRRCCC(((111LLL)))          _A_r_c has been in use in the CP/M and MSDOS world for many          years.  Thom Henderson developed the original version, but          it is important to note that _a_r_c is based on the file          compression theories developed by Huffman, Welch, Knott,          Knuth, and many other scientists. This implementation is          based on version 5.21 of the MSDOS program.     BBBUUUGGGSSS          _A_r_c behaves just like the PC version of the program; all          functions of the "usage" display are working.  Full          compatibility with PC ARC files is maintained, the price for          which is that _a_r_c doesn't like long filenames, and can only          archive files with names of up to 12 characters.  It will          *sometimes* do The Right Thing with them, but I suggest you          put long-winded filenames in a "shar" before _a_r_cing them.          There shouldn't be any problems, (hah!) but if you find any,          please send them to me at:               hyc@umix.cc.umich.edu      {rutgers, uunet}!umix!hyc     AAAUUUTTTHHHOOORRRSSS          Original MSDOS program by Thom Henderson          COPYRIGHT(C) 1985-87 by System Enhancement Associates; ALL          RIGHTS RESERVED          Original Lempel-Zev code derived from compress 4.0.          Modified to support Squashing by Dan Lanciani          (ddl@harvard.edu) Ported from MSDOS by Howard Chu          (umix!hyc), with help from John Gilmore (hoptoad!gnu), James          Turner (daisy!turner) and others.     Page 4                                           (printed 8/1/88)