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 #include <sys/cdefs.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <string.h> 36 #include <stdlib.h> 37 #include <stdio.h> 38 #include <stdarg.h> 39 #include <libutil.h> 40 41 static void (*efunc)(int, const char *, ...) = err; 42 43 void (* 44 esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...) 45 { 46 void (*of)(int, const char *, ...) = efunc; 47 efunc = ef == NULL ? (void (*)(int, const char *, ...))exit : ef; 48 return of; 49 } 50 51 size_t 52 estrlcpy(char *dst, const char *src, size_t len) 53 { 54 size_t rv; 55 if ((rv = strlcpy(dst, src, len)) >= len) { 56 errno = ENAMETOOLONG; 57 (*efunc)(1, 58 "Cannot copy string; %zu chars needed %zu provided", 59 rv, len); 60 } 61 return rv; 62 } 63 64 size_t 65 estrlcat(char *dst, const char *src, size_t len) 66 { 67 size_t rv; 68 if ((rv = strlcat(dst, src, len)) >= len) { 69 errno = ENAMETOOLONG; 70 (*efunc)(1, 71 "Cannot append to string; %zu chars needed %zu provided", 72 rv, len); 73 } 74 return rv; 75 } 76 77 char * 78 estrdup(const char *s) 79 { 80 char *d = strdup(s); 81 if (d == NULL) 82 (*efunc)(1, "Cannot copy string"); 83 return d; 84 } 85 86 char * 87 estrndup(const char *s, size_t len) 88 { 89 char *d = strndup(s, len); 90 if (d == NULL) 91 (*efunc)(1, "Cannot copy string"); 92 return d; 93 } 94 95 void * 96 emalloc(size_t n) 97 { 98 void *p = malloc(n); 99 if (p == NULL) 100 (*efunc)(1, "Cannot allocate %zu bytes", n); 101 return p; 102 } 103 104 void * 105 ecalloc(size_t n, size_t s) 106 { 107 void *p = calloc(n, s); 108 if (p == NULL) 109 (*efunc)(1, "Cannot allocate %zu bytes", n); 110 return p; 111 } 112 113 void * 114 erealloc(void *p, size_t n) 115 { 116 void *q = realloc(p, n); 117 if (q == NULL) 118 (*efunc)(1, "Cannot re-allocate %zu bytes", n); 119 return q; 120 } 121 122 int 123 easprintf(char ** __restrict ret, const char * __restrict format, ...) 124 { 125 int rv; 126 va_list ap; 127 va_start(ap, format); 128 if ((rv = vasprintf(ret, format, ap)) == -1) 129 (*efunc)(1, "Cannot format string"); 130 va_end(ap); 131 return rv; 132 } 133 134