usr/src/lib/libadm/common/puthelp.c

   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         free(tmp);
  73 }