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