usr/src/cmd/dfs.cmds/sharemgr/shareutil.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/types.h>
  30 #include "sharemgr.h"
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34
  35 /*
  36  * Utility functions shared by sharemgr and sharectl.
  37  */
  38
  39 /*
  40  * add_opt(optlist, optarg, security?)
  41  *      Add a new parsed option to the option list provided.
  42  *      If the option is a security option, only add if we are
  43  *      processing security options.
  44  */
  45 int
  46 add_opt(struct options **optlistp, char *optarg, int unset)
  47 {
  48         struct options *newopt, *tmp, *optlist;
  49         char *optname;
  50         char *optvalue;
  51
  52         optlist = *optlistp;
  53         newopt = (struct options *)malloc(sizeof (struct options));
  54         if (newopt == NULL)
  55                 return (OPT_ADD_MEMORY);
  56
  57         /* extract property/value pair */
  58         optname = optarg;
  59         if (!unset) {
  60                 optvalue = strchr(optname, '=');
  61                 if (optvalue == NULL) {
  62                         free(newopt);
  63                         return (OPT_ADD_SYNTAX);
  64                 }
  65                 *optvalue++ = '\0'; /* separate the halves */
  66         } else {
  67                 optvalue = NULL;
  68         }
  69
  70         newopt->optname = optname;
  71         newopt->optvalue = optvalue;
  72         newopt->next = NULL;
  73         if (optlist == NULL) {
  74                 optlist = newopt;
  75         } else {
  76                 for (tmp = optlist; tmp->next != NULL;
  77                     tmp = tmp->next) {
  78                         /*
  79                          * Check to see if this is a duplicate
  80                          * value. We want to replace the first
  81                          * instance with the second.
  82                          */
  83                         if (strcmp(tmp->optname, optname) == 0) {
  84                                 tmp->optvalue = optvalue;
  85                                 free(newopt);
  86                                 goto done;
  87                         }
  88                 }
  89                 tmp->next = newopt;
  90         }
  91 done:
  92         *optlistp = optlist;
  93         return (OPT_ADD_OK);
  94 }