xref: /titanic_50/usr/src/cmd/mail/getarg.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
24*7c478bd9Sstevel@tonic-gate 
25*7c478bd9Sstevel@tonic-gate 
26*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI" 	/* SVr4.0 2.	*/
27*7c478bd9Sstevel@tonic-gate #include "mail.h"
28*7c478bd9Sstevel@tonic-gate /*
29*7c478bd9Sstevel@tonic-gate 	get next token
30*7c478bd9Sstevel@tonic-gate 		p	-> string to be searched
31*7c478bd9Sstevel@tonic-gate 		s	-> area to return token
32*7c478bd9Sstevel@tonic-gate 	returns:
33*7c478bd9Sstevel@tonic-gate 		p	-> updated string pointer
34*7c478bd9Sstevel@tonic-gate 		s	-> token
35*7c478bd9Sstevel@tonic-gate 		NULL	-> no token
36*7c478bd9Sstevel@tonic-gate */
37*7c478bd9Sstevel@tonic-gate char *
getarg(s,p)38*7c478bd9Sstevel@tonic-gate getarg(s, p)
39*7c478bd9Sstevel@tonic-gate register char *s, *p;
40*7c478bd9Sstevel@tonic-gate {
41*7c478bd9Sstevel@tonic-gate 	while (*p == ' ' || *p == '\t') p++;
42*7c478bd9Sstevel@tonic-gate 	if (*p == '\n' || *p == '\0') return(NULL);
43*7c478bd9Sstevel@tonic-gate 	while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') *s++ = *p++;
44*7c478bd9Sstevel@tonic-gate 	*s = '\0';
45*7c478bd9Sstevel@tonic-gate 	return(p);
46*7c478bd9Sstevel@tonic-gate }
47