1 /* $NetBSD: efun.c,v 1.10 2015/07/26 02:20:30 kamil Exp $ */ 2 /* $FreeBSD$ */ 3 4 /*- 5 * Copyright (c) 2006 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Christos Zoulas. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #if HAVE_NBTOOL_CONFIG_H 34 #include "nbtool_config.h" 35 #endif 36 37 #include <sys/cdefs.h> 38 #ifdef __RCSID 39 __RCSID("$NetBSD: efun.c,v 1.10 2015/07/26 02:20:30 kamil Exp $"); 40 #endif 41 42 #include <err.h> 43 #include <errno.h> 44 #include <inttypes.h> 45 #include <string.h> 46 #include <stdlib.h> 47 #include <stdio.h> 48 #include <stdarg.h> 49 #include <util.h> 50 51 static void (*efunc)(int, const char *, ...) = err; 52 53 void (* 54 esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...) 55 { 56 void (*of)(int, const char *, ...) = efunc; 57 efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef; 58 return of; 59 } 60 61 size_t 62 estrlcpy(char *dst, const char *src, size_t len) 63 { 64 size_t rv; 65 if ((rv = strlcpy(dst, src, len)) >= len) { 66 errno = ENAMETOOLONG; 67 (*efunc)(1, 68 "Cannot copy string; %zu chars needed %zu provided", 69 rv, len); 70 } 71 return rv; 72 } 73 74 size_t 75 estrlcat(char *dst, const char *src, size_t len) 76 { 77 size_t rv; 78 if ((rv = strlcat(dst, src, len)) >= len) { 79 errno = ENAMETOOLONG; 80 (*efunc)(1, 81 "Cannot append to string; %zu chars needed %zu provided", 82 rv, len); 83 } 84 return rv; 85 } 86 87 char * 88 estrdup(const char *s) 89 { 90 char *d = strdup(s); 91 if (d == NULL) 92 (*efunc)(1, "Cannot copy string"); 93 return d; 94 } 95 96 char * 97 estrndup(const char *s, size_t len) 98 { 99 char *d = strndup(s, len); 100 if (d == NULL) 101 (*efunc)(1, "Cannot copy string"); 102 return d; 103 } 104 105 void * 106 emalloc(size_t n) 107 { 108 void *p = malloc(n); 109 if (p == NULL && n != 0) 110 (*efunc)(1, "Cannot allocate %zu bytes", n); 111 return p; 112 } 113 114 void * 115 ecalloc(size_t n, size_t s) 116 { 117 void *p = calloc(n, s); 118 if (p == NULL && n != 0 && s != 0) 119 (*efunc)(1, "Cannot allocate %zu blocks of size %zu", n, s); 120 return p; 121 } 122 123 void * 124 erealloc(void *p, size_t n) 125 { 126 void *q = realloc(p, n); 127 if (q == NULL && n != 0) 128 (*efunc)(1, "Cannot re-allocate %zu bytes", n); 129 return q; 130 } 131 132 FILE * 133 efopen(const char *p, const char *m) 134 { 135 FILE *fp = fopen(p, m); 136 if (fp == NULL) 137 (*efunc)(1, "Cannot open `%s'", p); 138 return fp; 139 } 140 141 int 142 easprintf(char ** __restrict ret, const char * __restrict format, ...) 143 { 144 int rv; 145 va_list ap; 146 va_start(ap, format); 147 if ((rv = vasprintf(ret, format, ap)) == -1) 148 (*efunc)(1, "Cannot format string"); 149 va_end(ap); 150 return rv; 151 } 152 153 int 154 evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap) 155 { 156 int rv; 157 if ((rv = vasprintf(ret, format, ap)) == -1) 158 (*efunc)(1, "Cannot format string"); 159 return rv; 160 } 161