/*
 * |-----------------------------------------------------------|
 * | Copyright (c) 1991, 1990 MIPS Computer Systems, Inc.      |
 * | All Rights Reserved                                       |
 * |-----------------------------------------------------------|
 * |          Restricted Rights Legend                         |
 * | Use, duplication, or disclosure by the Government is      |
 * | subject to restrictions as set forth in                   |
 * | subparagraph (c)(1)(ii) of the Rights in Technical        |
 * | Data and Computer Software Clause of DFARS 252.227-7013.  |
 * |         MIPS Computer Systems, Inc.                       |
 * |         950 DeGuigne Avenue                               |
 * |         Sunnyvale, California 94088-3650, USA             |
 * |-----------------------------------------------------------|
 */
#ident	"$Header: dname.c,v 1.8.2.1 92/06/24 13:57:37 marker Exp $"
/*	Copyright (c) 1984 AT&T	*/
/*	Copyright (c) 1988 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

# include	"sys/types.h"
# include	"macros.h"

/*
	Returns directory name containing a file
	(by modifying its argument).
	Returns "." if current
	directory; handles root correctly.
	Returns its argument.
	Bugs: doesn't handle null strings correctly.
*/

char *dname(p)
char *p;
{
	register char *c;
	register int s;
	unsigned	strlen();

	s = size(p);
	for(c = p+s-2; c > p; c--)
		if(*c == '/') {
			*c = '\0';
			return(p);
		}
	if (p[0] != '/')
		p[0] = '.';
	p[1] = 0;
	return(p);
}
