external/cddl/osnet/dist/cmd/zpool/zpool_util.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  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <errno.h>
  29 #include <libgen.h>
  30 #include <libintl.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <strings.h>
  34
  35 #include "zpool_util.h"
  36
  37 /*
  38  * Utility function to guarantee malloc() success.
  39  */
  40 void *
  41 safe_malloc(size_t size)
  42 {
  43         void *data;
  44
  45         if ((data = calloc(1, size)) == NULL) {
  46                 (void) fprintf(stderr, "internal error: out of memory\n");
  47                 exit(1);
  48         }
  49
  50         return (data);
  51 }
  52
  53 /*
  54  * Same as above, but for strdup()
  55  */
  56 char *
  57 safe_strdup(const char *str)
  58 {
  59         char *ret;
  60
  61         if ((ret = strdup(str)) == NULL) {
  62                 (void) fprintf(stderr, "internal error: out of memory\n");
  63                 exit(1);
  64         }
  65
  66         return (ret);
  67 }
  68
  69 /*
  70  * Display an out of memory error message and abort the current program.
  71  */
  72 void
  73 zpool_no_memory(void)
  74 {
  75         assert(errno == ENOMEM);
  76         (void) fprintf(stderr,
  77             gettext("internal error: out of memory\n"));
  78         exit(1);
  79 }
  80
  81 /*
  82  * Return the number of logs in supplied nvlist
  83  */
  84 uint_t
  85 num_logs(nvlist_t *nv)
  86 {
  87         uint_t nlogs = 0;
  88         uint_t c, children;
  89         nvlist_t **child;
  90
  91         if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
  92             &child, &children) != 0)
  93                 return (0);
  94
  95         for (c = 0; c < children; c++) {
  96                 uint64_t is_log = B_FALSE;
  97
  98                 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
  99                     &is_log);
 100                 if (is_log)
 101                         nlogs++;
 102         }
 103         return (nlogs);
 104 }