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 #include <ctype.h>
33 #include <sys/sysmacros.h>
34
35 #include "zpool_util.h"
36
37 /*
38 * Utility function to guarantee malloc() success.
39 */
40 void *
safe_malloc(size_t size)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 * Display an out of memory error message and abort the current program.
55 */
56 void
zpool_no_memory(void)57 zpool_no_memory(void)
58 {
59 assert(errno == ENOMEM);
60 (void) fprintf(stderr,
61 gettext("internal error: out of memory\n"));
62 exit(1);
63 }
64
65 /*
66 * Return the number of logs in supplied nvlist
67 */
68 uint_t
num_logs(nvlist_t * nv)69 num_logs(nvlist_t *nv)
70 {
71 uint_t nlogs = 0;
72 uint_t c, children;
73 nvlist_t **child;
74
75 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
76 &child, &children) != 0)
77 return (0);
78
79 for (c = 0; c < children; c++) {
80 uint64_t is_log = B_FALSE;
81
82 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
83 &is_log);
84 if (is_log)
85 nlogs++;
86 }
87 return (nlogs);
88 }
89
90 /* Find the max element in an array of uint64_t values */
91 uint64_t
array64_max(uint64_t array[],unsigned int len)92 array64_max(uint64_t array[], unsigned int len)
93 {
94 uint64_t max = 0;
95 int i;
96 for (i = 0; i < len; i++)
97 max = MAX(max, array[i]);
98
99 return (max);
100 }
101
102 /*
103 * Return 1 if "str" is a number string, 0 otherwise. Works for integer and
104 * floating point numbers.
105 */
106 int
isnumber(char * str)107 isnumber(char *str)
108 {
109 for (; *str; str++)
110 if (!(isdigit(*str) || (*str == '.')))
111 return (0);
112
113 return (1);
114 }
115