DIFF(1)			 HP-UX 5.0		       DIFF(1)

     NAME
	  diff, diffh - differential file comparator

     SYNOPSIS
	  diff [ -efbh ] file1 file2

	  /usr/lib/diffh file1 file2

     HP-UX COMPATIBILITY
	  Level:    HP-UX/STANDARD

	  Origin:   System V

	  Native Language Support:
		    8-bit data, customs, messages.

     DESCRIPTION
	  Diff tells what lines must be changed in two files to	 bring
	  them	into  agreement.   If file1 (file2) is -, the standard
	  input is used.  If file1 (file2) is a directory, then a file
	  in  that directory with the name file2 (file1) is used.  The
	  normal output contains lines of these forms:

	       n1 a n3,n4
	       n1,n2 d n3
	       n1,n2 c n3,n4

	  These lines resemble	ed  commands  to  convert  file1  into
	  file2.   The numbers after the letters pertain to file2.  In
	  fact, by exchanging a for d and  reading  backward  one  may
	  ascertain  equally  how  to convert file2 into file1.	 As in
	  ed, identical	 pairs,	 where	n1  =  n2  or  n3  =  n4,  are
	  abbreviated as a single number.

	  Following each of these lines come all the  lines  that  are
	  affected  in the first file flagged by <, then all the lines
	  that are affected in the second file flagged by >.

	  The options are:

	       -b   causes trailing blanks (spaces  and	 tabs)	to  be
		    ignored  and  other	 strings  of blanks to compare
		    equal.

	       -e   produces a script of a, c and d commands  for  the
		    editor ed, which will recreate file2 from file1.

	       -f   produces a script similar to that of -e,  only  it
		    is	not  useful with ed, and it is in the opposite
		    order.

	       -h   does a fast, half-hearted job.  It works only when
		    changed  stretches	of  text  are  short and well-
		    separated, but does work  on  files	 of  unlimited
		    length.   Options  -e  and -f are unavailable with
		    -h.

		    Diffh is  equivalent  to  diff  -h.	  It  must  be
		    invoked as shown above in the synopsis, unless the
		    PATH variable in  your  environment	 includes  the
		    directory /usr/lib.

	  In connection with -e, the following shell program may  help
	  maintain  multiple  versions	of  a file.  Only an ancestral
	  file ($1) and	 a  chain  of  version-to-version  ed  scripts
	  ($2,$3,...)  made  by	 diff  need  be	 on  hand.  A ``latest
	  version'' appears on the standard output.

	       (shift; cat $*; echo '1,$p') | ed - $1

	  Except  in  rare  circumstances,  diff  finds	  a   smallest
	  sufficient set of file differences.

     FILES
	  /tmp/d?????
	  /usr/lib/diffh for -h

     SEE ALSO
	  cmp(1),  comm(1),  diff3(1),	diffmk(1),  dircmp(1),	ed(1),
	  sccsdiff(1), sdiff(1).

     DIAGNOSTICS
	  Exit status is 0 for no differences, 1 for some differences,
	  2 for trouble.

     BUGS
	  Editing scripts produced under the -e or -f option are naive
	  about creating lines consisting of a single period (.).

     WARNINGS
	  Missing newline at end of file X
	       indicates that the last line of file X did not  have  a
	       new-line.   If  the  lines  are different, they will be
	       flagged and output; although the output	will  seem  to
	       indicate they are the same.