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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, Version 1.0 only | |
6 | * (the "License"). You may not use this file except in compliance | |
7 | * with the License. | |
8 | * | |
9 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
10 | * or http://www.opensolaris.org/os/licensing. | |
11 | * See the License for the specific language governing permissions | |
12 | * and limitations under the License. | |
13 | * | |
14 | * When distributing Covered Code, include this CDDL HEADER in each | |
15 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
16 | * If applicable, add the following below this CDDL HEADER, with the | |
17 | * fields enclosed by brackets "[]" replaced with your own identifying | |
18 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
19 | * | |
20 | * CDDL HEADER END | |
21 | */ | |
22 | /* | |
23 | * Copyright 2004 Sun Microsystems, Inc. All rights reserved. | |
24 | * Use is subject to license terms. | |
25 | */ | |
26 | ||
27 | ||
28 | ||
29 | #include "libuutil_common.h" | |
30 | ||
31 | #include <stdarg.h> | |
32 | #include <stdio.h> | |
33 | #include <stdlib.h> | |
34 | #include <string.h> | |
35 | ||
36 | void * | |
37 | uu_zalloc(size_t n) | |
38 | { | |
39 | void *p = malloc(n); | |
40 | ||
41 | if (p == NULL) { | |
42 | uu_set_error(UU_ERROR_SYSTEM); | |
43 | return (NULL); | |
44 | } | |
45 | ||
46 | (void) memset(p, 0, n); | |
47 | ||
48 | return (p); | |
49 | } | |
50 | ||
51 | void | |
52 | uu_free(void *p) | |
53 | { | |
54 | free(p); | |
55 | } | |
56 | ||
57 | char * | |
58 | uu_msprintf(const char *format, ...) | |
59 | { | |
60 | va_list args; | |
61 | char attic[1]; | |
62 | uint_t M, m; | |
63 | char *b; | |
64 | ||
65 | va_start(args, format); | |
66 | M = vsnprintf(attic, 1, format, args); | |
67 | va_end(args); | |
68 | ||
69 | for (;;) { | |
70 | m = M; | |
71 | if ((b = uu_zalloc(m + 1)) == NULL) | |
72 | return (NULL); | |
73 | ||
74 | va_start(args, format); | |
75 | M = vsnprintf(b, m + 1, format, args); | |
76 | va_end(args); | |
77 | ||
78 | if (M == m) | |
79 | break; /* sizes match */ | |
80 | ||
81 | uu_free(b); | |
82 | } | |
83 | ||
84 | return (b); | |
85 | } |