48  *	and then executes diff upon the pieces. The output of
49  *	'diff' is then processed to make it look as if 'diff' had
51  *	is a reasonable upper limit on the size of files that diff can
57  *	the files whole, assuming 'diff' could handle such large files.
59  *	'diff' is executed by a child process, generated by forking,
67 static char diff[]  =  "/usr/bin/diff";  variable
160 	 * sent to 'diff'. Since the running time of 'diff' is  in main()
165 	 * program will generate the appropriate 'diff' output  in main()
167 	 * avoid executing 'diff' completely.  in main()
180 			 * 'diff'-like output, which is of the form:  in main()
191 			 * 'diff'-like output, which is of the form:  in main()
207 	 * seglim segments, forks and executes 'diff' on the  in main()
209 	 * 'diff', which is read from a pipe.  in main()
219 			 * output without executing 'diff'.  in main()
227 			 * output without executing 'diff'.  in main()
279 			/* Execute 'diff' on the segment files. */  in main()
280 			(void) execlp(diff, diff, otmp, ntmp, 0);  in main()
285 			 * as non-error because the child process "diff" exits  in main()
292 			    "Can not execute '%s'", diff);  in main()
299 			/* Process 'diff' output. */  in main()
313 				    "'%s' failed", diff);  in main()
403 	/* Output saved lines, as 'diff' would. */  in addgen()
425 	/* Output saved lines, as 'diff' would.  */  in delgen()