1 /* $NetBSD: efun.c,v 1.10 2015/07/26 02:20:30 kamil 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 1.10 2015/07/26 02:20:30 kamil Exp $"); 39 #endif 40 41 #include <err.h> 42 #include <errno.h> 43 #include <inttypes.h> 44 #include <string.h> 45 #include <stdlib.h> 46 #include <stdio.h> 47 #include <stdarg.h> 48 #include <util.h> 49 50 static void (*efunc)(int, const char *, ...) = err; 51 52 void (* 53 esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...) 54 { 55 void (*of)(int, const char *, ...) = efunc; 56 efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef; 57 return of; 58 } 59 60 size_t 61 estrlcpy(char *dst, const char *src, size_t len) 62 { 63 size_t rv; 64 if ((rv = strlcpy(dst, src, len)) >= len) { 65 errno = ENAMETOOLONG; 66 (*efunc)(1, 67 "Cannot copy string; %zu chars needed %zu provided", 68 rv, len); 69 } 70 return rv; 71 } 72 73 size_t 74 estrlcat(char *dst, const char *src, size_t len) 75 { 76 size_t rv; 77 if ((rv = strlcat(dst, src, len)) >= len) { 78 errno = ENAMETOOLONG; 79 (*efunc)(1, 80 "Cannot append to string; %zu chars needed %zu provided", 81 rv, len); 82 } 83 return rv; 84 } 85 86 char * 87 estrdup(const char *s) 88 { 89 char *d = strdup(s); 90 if (d == NULL) 91 (*efunc)(1, "Cannot copy string"); 92 return d; 93 } 94 95 char * 96 estrndup(const char *s, size_t len) 97 { 98 char *d = strndup(s, len); 99 if (d == NULL) 100 (*efunc)(1, "Cannot copy string"); 101 return d; 102 } 103 104 void * 105 emalloc(size_t n) 106 { 107 void *p = malloc(n); 108 if (p == NULL && n != 0) 109 (*efunc)(1, "Cannot allocate %zu bytes", n); 110 return p; 111 } 112 113 void * 114 ecalloc(size_t n, size_t s) 115 { 116 void *p = calloc(n, s); 117 if (p == NULL && n != 0 && s != 0) 118 (*efunc)(1, "Cannot allocate %zu blocks of size %zu", n, s); 119 return p; 120 } 121 122 void * 123 erealloc(void *p, size_t n) 124 { 125 void *q = realloc(p, n); 126 if (q == NULL && n != 0) 127 (*efunc)(1, "Cannot re-allocate %zu bytes", n); 128 return q; 129 } 130 131 FILE * 132 efopen(const char *p, const char *m) 133 { 134 FILE *fp = fopen(p, m); 135 if (fp == NULL) 136 (*efunc)(1, "Cannot open `%s'", p); 137 return fp; 138 } 139 140 int 141 easprintf(char ** __restrict ret, const char * __restrict format, ...) 142 { 143 int rv; 144 va_list ap; 145 va_start(ap, format); 146 if ((rv = vasprintf(ret, format, ap)) == -1) 147 (*efunc)(1, "Cannot format string"); 148 va_end(ap); 149 return rv; 150 } 151 152 int 153 evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap) 154 { 155 int rv; 156 if ((rv = vasprintf(ret, format, ap)) == -1) 157 (*efunc)(1, "Cannot format string"); 158 return rv; 159 } 160