NAME
	  sdiff	- Compares two files and displays the differences in a
	  side-by-side format

     SYNOPSIS
	  sdiff	[-l | -s] [-w number] [-o output_file] file1 file2


	  The sdiff command reads file1	and file2, uses	diff to	com-
	  pare them, and writes	the results to standard	output in a
	  side-by-side format.

     FLAGS
	  -l  Displays only the	left side when lines are identical.

	  -o  output_file
	      Creates a	third file, output_file, by a controlled
	      interactive line-by-line merging of file1	and file2.
	      The following subcommands	govern the creation of this
	      file:


	      l	  Adds the left	side to	output_file.

	      r	  Adds the right side to output_file.

	      s	  Stops	displaying identical lines.

	      v	  Begins displaying identical lines.

	      e	l or e <

	      e	r or e >

	      e	b or e |

	      e	  Enters ed with the left side,	the right side,	both
		  sides, or an empty file, respectively.

		  Each time you	exit from ed, sdiff writes the result-
		  ing edited file to the end of	output_file.  If you
		  fail to save the changes before exiting, sdiff
		  writes the initial input to output_file.

	      q	  Exits	the interactive	session.


	  -s  Supresses	display	of identical lines.

	  -w number
	      Sets the width of	the output line	to number (130 charac-
	      ters by default).

     DESCRIPTION
	  The sdiff command displays each line of the two files	with a
	  series of spaces between them	if the lines are identical, a
	  < (left angle	bracket) in the	field of spaces	if the line
	  only exists in file1,	a > (right angle bracket) if the line
	  only exists in file2,	and a |	(vertical bar) for lines that
	  are different.

	  When you specify the -o flag,	sdiff produces a third file by
	  merging file1	and file2 according to your instructions.

	  Note that the	sdiff command invokes the diff -b command to
	  compare two input files.  The	-b flag	causes the diff	com-
	  mand to ignore trailing spaces, tab characters, and consider
	  other	strings	of spaces as equal.

     EXAMPLES
	   1.  To print	a comparison of	two files, enter:

	       sdiff  chap1.bak	 chap1



	       This displays a side-by-side listing that compares each
	       line of chap1.bak and chap1.

	   2.  To display only the lines that differ, enter:

	       sdiff  -s  -w 80	 chap1.bak  chap1



	       This displays the differences at	the tty.  The -w 80
	       sets page width to 80 columns.  The -s flag tells sdiff
	       not to display lines that are identical in both files.

	   3.  To selectively combine parts of two files, enter:

	       sdiff -s	 -w 80	-o chap1.combo	chap1.bak  chap1



	       This combines chap1.bak and chap1 into a	new file
	       called chap1.combo.  For	each group of differing	lines,
	       sdiff asks you which group to keep or whether you want
	       to edit them using ed.


     RELATED INFORMATION
	  Commands:  diff(1), ed(1)/red(1).