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 <err.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 #ifndef __minix 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 #endif 105 106 void * 107 emalloc(size_t n) 108 { 109 void *p = malloc(n); 110 if (p == NULL) 111 (*efunc)(1, "Cannot allocate %zu bytes", n); 112 return p; 113 } 114 115 void * 116 ecalloc(size_t n, size_t s) 117 { 118 void *p = calloc(n, s); 119 if (p == NULL) 120 (*efunc)(1, "Cannot allocate %zu bytes", n); 121 return p; 122 } 123 124 void * 125 erealloc(void *p, size_t n) 126 { 127 void *q = realloc(p, n); 128 if (q == NULL) 129 (*efunc)(1, "Cannot re-allocate %zu bytes", n); 130 return q; 131 } 132 133 FILE * 134 efopen(const char *p, const char *m) 135 { 136 FILE *fp = fopen(p, m); 137 if (fp == NULL) 138 (*efunc)(1, "Cannot open `%s'", p); 139 return fp; 140 } 141 142 #ifndef _MINIX 143 int 144 easprintf(char ** __restrict ret, const char * __restrict format, ...) 145 { 146 int rv; 147 va_list ap; 148 va_start(ap, format); 149 if ((rv = vasprintf(ret, format, ap)) == -1) 150 (*efunc)(1, "Cannot format string"); 151 va_end(ap); 152 return rv; 153 } 154 155 int 156 evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap) 157 { 158 int rv; 159 if ((rv = vasprintf(ret, format, ap)) == -1) 160 (*efunc)(1, "Cannot format string"); 161 return rv; 162 } 163 #endif 164