xref: /illumos-gate/usr/src/lib/libadm/common/puthelp.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
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 
23 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
24 /*	  All Rights Reserved  	*/
25 
26 
27 /*
28  * Copyright (c) 1997, by Sun Microsystems, Inc.
29  * All rights reserved.
30  */
31 
32 /*LINTLIBRARY*/
33 
34 #include <stdio.h>
35 #include <string.h>
36 #include <stdlib.h>
37 #include <sys/types.h>
38 #include "libadm.h"
39 
40 void
41 puthelp(FILE *fp, char *defmesg, char *help)
42 {
43 	char	*tmp;
44 	size_t	n;
45 
46 	tmp = NULL;
47 	if (help == NULL) {
48 		/* use default message since no help was provided */
49 		help = defmesg ? defmesg : "No help available.";
50 	} else if (defmesg != NULL) {
51 		n = strlen(help);
52 		if (help[0] == '~') {
53 			/* prepend default message */
54 			tmp = calloc(n+strlen(defmesg)+1, sizeof (char));
55 			(void) strcpy(tmp, defmesg);
56 			(void) strcat(tmp, "\n");
57 			++help;
58 			(void) strcat(tmp, help);
59 			help = tmp;
60 		} else if (n && (help[n-1] == '~')) {
61 			/* append default message */
62 			tmp = calloc(n+strlen(defmesg)+2, sizeof (char));
63 			(void) strcpy(tmp, help);
64 			tmp[n-1] = '\0';
65 			(void) strcat(tmp, "\n");
66 			(void) strcat(tmp, defmesg);
67 			help = tmp;
68 		}
69 	}
70 	(void) puttext(fp, help, ckindent, ckwidth);
71 	(void) fputc('\n', fp);
72 	if (tmp)
73 		free(tmp);
74 }
75