OpenSolaris_b135/cmd/mail/getarg.c

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/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/


#pragma ident	"%Z%%M%	%I%	%E% SMI" 	/* SVr4.0 2.	*/
#include "mail.h"
/*
	get next token
		p	-> string to be searched
		s	-> area to return token
	returns:
		p	-> updated string pointer
		s	-> token
		NULL	-> no token
*/
char *
getarg(s, p)	
register char *s, *p;
{
	while (*p == ' ' || *p == '\t') p++;
	if (*p == '\n' || *p == '\0') return(NULL);
	while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') *s++ = *p++;
	*s = '\0';
	return(p);
}