BDIFF(1SCCS)            COMMAND REFERENCE            BDIFF(1SCCS)



NAME
     bdiff - big diff

SYNOPSIS
     bdiff filename1 filename2 [n] [-s]

DESCRIPTION
     Bdiff is used in a manner analogous to diff (1) to find
     which lines must be changed in two files to bring them into
     agreement.  Its purpose is to allow processing of files
     which are too large for diff.  Bdiff ignores lines common to
     the beginning of both files, splits the remainder of each
     file into n-line segments, and invokes diff upon
     corresponding 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 causing
     it to fail.  If filename1 (filename2) is a dash (-), the
     standard input is read.  The optional -s (silent) argument
     specifies that no diagnostics are to be printed by bdiff
     (note, however, that this does not suppress possible
     exclamations by diff).  If both optional arguments are
     specified, they must appear in the order indicated 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 that because of the segmenting of the files,
     bdiff does not necessarily find a smallest sufficient set of
     file differences.

OPTIONS
     -s  Specifies that no diagnostics are to be printed by
         bdiff.

FILES
     /tmp/bd?????             Temporary file for performing the
                              diff command.

DIAGNOSTICS
     Use sccshelp (1sccs) for explanations.

SEE ALSO
     diff(1).











Printed 10/17/86                                                1

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