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      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 2009 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #include <errno.h>
     27 #include <libgen.h>
     28 #include <libintl.h>
     29 #include <stdio.h>
     30 #include <stdlib.h>
     31 #include <strings.h>
     32 
     33 #include "zpool_util.h"
     34 
     35 /*
     36  * Utility function to guarantee malloc() success.
     37  */
     38 void *
     39 safe_malloc(size_t size)
     40 {
     41 	void *data;
     42 
     43 	if ((data = calloc(1, size)) == NULL) {
     44 		(void) fprintf(stderr, "internal error: out of memory\n");
     45 		exit(1);
     46 	}
     47 
     48 	return (data);
     49 }
     50 
     51 /*
     52  * Display an out of memory error message and abort the current program.
     53  */
     54 void
     55 zpool_no_memory(void)
     56 {
     57 	assert(errno == ENOMEM);
     58 	(void) fprintf(stderr,
     59 	    gettext("internal error: out of memory\n"));
     60 	exit(1);
     61 }
     62 
     63 /*
     64  * Return the number of logs in supplied nvlist
     65  */
     66 uint_t
     67 num_logs(nvlist_t *nv)
     68 {
     69 	uint_t nlogs = 0;
     70 	uint_t c, children;
     71 	nvlist_t **child;
     72 
     73 	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
     74 	    &child, &children) != 0)
     75 		return (0);
     76 
     77 	for (c = 0; c < children; c++) {
     78 		uint64_t is_log = B_FALSE;
     79 
     80 		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
     81 		    &is_log);
     82 		if (is_log)
     83 			nlogs++;
     84 	}
     85 	return (nlogs);
     86 }
     87