User Commands                                            bdiff(1)


     bdiff - big diff


     bdiff filename1 filename2 [n] [-s]


     bdiff is used in a manner analogous to diff  to  find  which
     lines  in  filename1  and filename2 must be changed to bring
     the files into agreement.  Its purpose is to allow  process-
     ing  of  files too large for diff.  If filename1 (filename2)
     is -, the standard input is read.

     bdiff ignores lines common to the beginning of  both  files,
     splits  the remainder of each file into n-line segments, and
     invokes diff on corresponding segments.   If  both  optional
     arguments are specified, they must appear in the order indi-
     cated above.

     The output of bdiff is  exactly  that  of  diff,  with  line
     numbers  adjusted to account for the segmenting of the files
     (that is, to make it look as if the files had been processed
     whole). Note:  Because of the segmenting of the files, bdiff
     does not necessarily find a smallest sufficient set of  file


     n    The number of line segments. The value of n is 3500  by
          default.   If  the optional third argument is given and
          it is numeric, it is used as the value for n.  This  is
          useful  in  those cases in which 3500-line segments are
          too large for diff, causing it to fail.

     -s   Specifies that no diagnostics  are  to  be  printed  by
          bdiff  (silent  option).  Note:  However, this does not
          suppress possible diagnostic messages from diff,  which
          bdiff calls.


     See largefile(5) for the  description  of  the  behavior  of
     bdiff  when  encountering  files  greater than or equal to 2
     Gbyte (2^31 bytes).

SunOS 5.11           Last change: 2016/11/27                    1

User Commands                                            bdiff(1)




     See attributes(5) for descriptions of the  following  attri-

    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    | Availability                | SUNWesu                     |
    | CSI                         | enabled                     |


     diff(1), attributes(5), largefile(5)


     Use help for explanations.


     This version of bdiff(1) supports lines of arbitrary  length
     and  is able to deal with binary content (null bytes) in the
     files. It thus calls diff(1) with the -a option.   The  well
     known  main  caller  of  bdiff(1),  which  is sccs-delta(1),
     checks for binary content before calling bdiff(1).  Previous
     versions  of  bdiff(1)  did not check for binary content and
     silently discarded null bytes.


     The bdiff(1) program was initially written at Bell  Labs  in
     the  1970s as part of SCCS.  The SVr4 release was written by
     various authors at AT&T in 1989.  The bdiff(1) programm  was
     later maintained by various people at AT&T and Sun Microsys-
     tems.  Since 2006, it is maintained by Joerg Schilling.

SunOS 5.11           Last change: 2016/11/27                    2

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