Index: cmp.c
===================================================================
--- cmp.c	(revision 232145)
+++ cmp.c	(working copy)
@@ -138,8 +138,8 @@
 char	c1, c2;				/* character from each file				*/
 int		differ;				/* set if files differ and -l option	*/
 int		fd1, fd2;
-int		fd1_nread;
-int		fd2_nread;
+int		fd1_nread,prev_fd1_nread;
+int		fd2_nread,prev_fd2_nread;
 char 	file1buf[STATIC_BUFSIZE];
 char	file2buf[STATIC_BUFSIZE];
 /*----------------------------------------------------------- main ---------
@@ -229,6 +229,11 @@
 					fprintf( stderr, S_EOF_FORMAT, fd1_nread==0 ? file1 : file2 );
 				exit( differ ? IO_ERROR_RC : FILES_DIFFER_RC );
 			}	/* if */
+			if(prev_fd1_nread != prev_fd2_nread ) {
+				if ( silent == FALSE )
+					fprintf( stderr, S_EOF_FORMAT, prev_fd1_nread < prev_fd2_nread ? file1 : file2 );
+				exit( differ ? IO_ERROR_RC : FILES_DIFFER_RC );
+			}
 		}
 
 		if(memcmp(file1buf,file2buf,min(fd1_nread,fd2_nread))) {
@@ -257,6 +262,8 @@
 			if((file1buf[i] == '\n') || (file2buf[i] == '\n'))
 				line_count++;
 		}
+		prev_fd1_nread = fd1_nread;
+		prev_fd2_nread = fd2_nread;
 	} /* for */
 		
 	return ( differ ? FILES_DIFFER_RC : FILES_ARE_IDENTICAL_RC );