.\" Copyright (c) 1986 The Regents of the University of California. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms are permitted provided .\" that: (1) source distributions retain this entire copyright notice and .\" comment, and (2) distributions including binaries display the following .\" acknowledgement: ``This product includes software developed by the .\" University of California, Berkeley and its contributors'' in the .\" documentation or other materials provided with the distribution and in .\" all advertising materials mentioning features or use of this software. .\" Neither the name of the University nor the names of its contributors may .\" be used to endorse or promote products derived from this software without .\" specific prior written permission. .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" .\" @(#)Title 6.2 (Berkeley) 6/7/90 .\" .ps 18 .vs 22 .sp 2.75i .ft B .ce 3 UNIX Programmer's Supplementary Documents Volume 1 (PS1) .ps 14 .vs 16 .sp |4i .ce 2 4.3 Berkeley Software Distribution Virtual VAX\-11 Version .sp |5.75i .ft R .pt 12 .vs 16 .ce April, 1986 .sp |8.2i .ce 5 Computer Systems Research Group Computer Science Division Department of Electrical Engineering and Computer Science University of California Berkeley, California 94720 .bp .ll 5.3i .in 1.25i .hy 0 .ps 10 .vs 12p .sp |2.5i Copyright 1979, 1980, 1983, 1986 Regents of the University of California. Permission to copy these documents or any portion thereof as necessary for licensed use of the software is granted to licensees of this software, provided this copyright notice and statement of permission are included. .sp 2 Documents PS1:1, 9, 10, 12, 15, 16, and 17 are copyright 1979, AT&T Bell Laboratories, Incorporated. Documents PS1:2, and 5 are modifications of earlier documents that are copyrighted 1979 by AT&T Bell Laboratories, Incorporated. Holders of \x'-1p'UNIX\v'-4p'\s-3TM\s0\v'4p'/32V, System III, or System V software licenses are permitted to copy these documents, or any portion of them, as necessary for licensed use of the software, provided this copyright notice and statement of permission are included. .sp 2 Document PS1:13 is part of the user contributed software and is copyright 1983 by Walter F. Tichy. Permission to copy the RCS documentation or any portion thereof as necessary for licensed use of the software is granted to licensees of this software, provided this copyright notice is included. .sp 2 This manual reflects system enhancements made at Berkeley and sponsored in part by the Defense Advanced Research Projects Agency (DoD), Arpa Order No. 4871 monitored by the Naval Electronics Systems Command under contract No. N00039-84-C-0089. The views and conclusions contained in these documents are those of the authors and should not be interpreted as representing official policies, either expressed or implied, of the Defense Research Projects Agency or of the US Government.