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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 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 }
    105