1 /* $NetBSD: efun.c,v 1.6 2008/04/28 20:23:02 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #ifdef __RCSID 38 __RCSID("$NetBSD: efun.c,v 1.6 2008/04/28 20:23:02 martin Exp $"); 39 #endif 40 41 #include <err.h> 42 #include <errno.h> 43 #include <string.h> 44 #include <stdlib.h> 45 #include <stdio.h> 46 #include <stdarg.h> 47 #include <util.h> 48 49 static void (*efunc)(int, const char *, ...) = err; 50 51 void (* 52 esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...) 53 { 54 void (*of)(int, const char *, ...) = efunc; 55 efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef; 56 return of; 57 } 58 59 size_t 60 estrlcpy(char *dst, const char *src, size_t len) 61 { 62 size_t rv; 63 if ((rv = strlcpy(dst, src, len)) >= len) { 64 errno = ENAMETOOLONG; 65 (*efunc)(1, 66 "Cannot copy string; %zu chars needed %zu provided", 67 rv, len); 68 } 69 return rv; 70 } 71 72 size_t 73 estrlcat(char *dst, const char *src, size_t len) 74 { 75 size_t rv; 76 if ((rv = strlcat(dst, src, len)) >= len) { 77 errno = ENAMETOOLONG; 78 (*efunc)(1, 79 "Cannot append to string; %zu chars needed %zu provided", 80 rv, len); 81 } 82 return rv; 83 } 84 85 char * 86 estrdup(const char *s) 87 { 88 char *d = strdup(s); 89 if (d == NULL) 90 (*efunc)(1, "Cannot copy string"); 91 return d; 92 } 93 94 char * 95 estrndup(const char *s, size_t len) 96 { 97 char *d = strndup(s, len); 98 if (d == NULL) 99 (*efunc)(1, "Cannot copy string"); 100 return d; 101 } 102 103 void * 104 emalloc(size_t n) 105 { 106 void *p = malloc(n); 107 if (p == NULL) 108 (*efunc)(1, "Cannot allocate %zu bytes", n); 109 return p; 110 } 111 112 void * 113 ecalloc(size_t n, size_t s) 114 { 115 void *p = calloc(n, s); 116 if (p == NULL) 117 (*efunc)(1, "Cannot allocate %zu bytes", n); 118 return p; 119 } 120 121 void * 122 erealloc(void *p, size_t n) 123 { 124 void *q = realloc(p, n); 125 if (q == NULL) 126 (*efunc)(1, "Cannot re-allocate %zu bytes", n); 127 return q; 128 } 129 130 FILE * 131 efopen(const char *p, const char *m) 132 { 133 FILE *fp = fopen(p, m); 134 if (fp == NULL) 135 (*efunc)(1, "Cannot open `%s'", p); 136 return fp; 137 } 138 139 int 140 easprintf(char ** __restrict ret, const char * __restrict format, ...) 141 { 142 int rv; 143 va_list ap; 144 va_start(ap, format); 145 if ((rv = vasprintf(ret, format, ap)) == -1) 146 (*efunc)(1, "Cannot format string"); 147 va_end(ap); 148 return rv; 149 } 150 151 int 152 evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap) 153 { 154 int rv; 155 if ((rv = vasprintf(ret, format, ap)) == -1) 156 (*efunc)(1, "Cannot format string"); 157 return rv; 158 } 159