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Annotation of coherent/a/usr/man/COHERENT/dd, revision 1.1.1.1

1.1       root        1: 
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                      3: dd                           Command                           dd
                      4: 
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                      7: 
                      8: File conversion
                      9: 
                     10: dddd [_o_p_t_i_o_n=_v_a_l_u_e] ...
                     11: 
                     12: dd copies  an input file to an output  file, while performing re-
                     13: quested conversions.  Options include case and character set con-
                     14: versions, byte  swapping conversion for other  machines, and dif-
                     15: ferent input  and output buffer  sizes.  dd can be  used with raw
                     16: disk files  or raw tape  files to do efficient  copies with large
                     17: block  (record) sizes.   Read and write  requests can  be changed
                     18: with the bs option described below.
                     19: 
                     20: The  following list  gives  each available  option.  Any  numbers
                     21: which specify  block sizes  or seek  positions may be  written in
                     22: several ways.  A  number followed by w, b, or  k is multiplied by
                     23: two  (for words),  512 (for  blocks),  or 1,024  (for kilobytes),
                     24: respectively, to  obtain the size in bytes.  A  pair of such num-
                     25: bers separated  by x is multiplied together  to produce the size.
                     26: All buffer sizes default to 512 bytes if not specified.
                     27: 
                     28: bbss=_n    Set the size of the buffer for both input and output to n
                     29:         bytes.
                     30: 
                     31: ccbbss=_n   Set the conversion buffer size to n bytes (used only with
                     32:         character set conversions between ASCII and EBCDIC).
                     33: 
                     34: ccoonnvv=_l_i_s_t
                     35:         Perform  conversions  specified  by  the  comma-separated
                     36:         list, which may include the following:
                     37: 
                     38:         aasscciiii          Convert EBCDIC to ASCII.
                     39:         eebbccddiicc         Convert ASCII to EBCDIC.
                     40:         iibbmm            Convert ASCII to EBCDIC, IBM flavor.
                     41:         llccaassee          Convert upper case to lower.
                     42:         nnooeerrrroorr        Continue processing on I/O errors.
                     43:         sswwaabb           Swap every pair of bytes before output.
                     44:         ssyynncc           Pad input buffers with 0 bytes to size of iibbss.
                     45:         uuccaassee          Convert lower case to upper.
                     46: 
                     47: 
                     48: ccoouunntt=_n
                     49:         Copy a maximum of n input records.
                     50: 
                     51: ffiilleess=_n
                     52:         Copy a  maximum of  n input  files (useful  for multifile
                     53:         tapes).
                     54: 
                     55: iibbss=_n   Set the  input buffer size  to n (normally  used if input
                     56:         and output blocking sizes are to be different).
                     57: 
                     58: iiff=_f_i_l_e
                     59:         Open file for input;  the standard input is  used when no
                     60:         if= option is given.
                     61: 
                     62: 
                     63: 
                     64: COHERENT Lexicon                                           Page 1
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                     68: 
                     69: dd                           Command                           dd
                     70: 
                     71: 
                     72: 
                     73: oobbss=_n   Set the output buffer size to n.
                     74: 
                     75: ooff=_f_i_l_e
                     76:         Open file for output; the standard output is used when no
                     77:         of= option is given.
                     78: 
                     79: sseeeekk=_n  Seek to position  n bytes into the  output before copying
                     80:         (does  not  work  on stream  data  such  as  tapes,  com-
                     81:         munications devices, and pipes).
                     82: 
                     83: sskkiipp=_n  Read and discard the first n input records.
                     84: 
                     85: ***** See Also *****
                     86: 
                     87: ASCII, commands, conv, cp, tape, tr
                     88: 
                     89: ***** Diagnostics *****
                     90: 
                     91: The command  reports the number of full  and partial buffers read
                     92: and written upon completion.
                     93: 
                     94: ***** Notes *****
                     95: 
                     96: Because  of differing interpretations  of EBCDIC,  especially for
                     97: certain more  exotic graphic characters such  as braces and back-
                     98: slash,  no one  conversion  table will  be adequate  for all  ap-
                     99: plications.   The ebcdic  table is the  American Standard  of the
                    100: Business  Equipment  Manufacturers  Association.  The  ibm  table
                    101: seems to be more practical for line printer codes at many IBM in-
                    102: stallations.
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                    130: COHERENT Lexicon                                           Page 2
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