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 #pragma ident "%Z%%M% %I% %E% SMI" 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 } 86