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 static void __dead2 44 efun_exit(int status, const char *a __unused, ...) 45 { 46 exit(status); 47 } 48 49 void (* 50 esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...) 51 { 52 void (*of)(int, const char *, ...) = efunc; 53 efunc = (ef == NULL) ? efun_exit : ef; 54 return of; 55 } 56 57 size_t 58 estrlcpy(char *dst, const char *src, size_t len) 59 { 60 size_t rv; 61 if ((rv = strlcpy(dst, src, len)) >= len) { 62 errno = ENAMETOOLONG; 63 (*efunc)(1, 64 "Cannot copy string; %zu chars needed %zu provided", 65 rv, len); 66 } 67 return rv; 68 } 69 70 size_t 71 estrlcat(char *dst, const char *src, size_t len) 72 { 73 size_t rv; 74 if ((rv = strlcat(dst, src, len)) >= len) { 75 errno = ENAMETOOLONG; 76 (*efunc)(1, 77 "Cannot append to string; %zu chars needed %zu provided", 78 rv, len); 79 } 80 return rv; 81 } 82 83 char * 84 estrdup(const char *s) 85 { 86 char *d = strdup(s); 87 if (d == NULL) 88 (*efunc)(1, "Cannot copy string"); 89 return d; 90 } 91 92 char * 93 estrndup(const char *s, size_t len) 94 { 95 char *d = strndup(s, len); 96 if (d == NULL) 97 (*efunc)(1, "Cannot copy string"); 98 return d; 99 } 100 101 void * 102 emalloc(size_t n) 103 { 104 void *p = malloc(n); 105 if (p == NULL) 106 (*efunc)(1, "Cannot allocate %zu bytes", n); 107 return p; 108 } 109 110 void * 111 ecalloc(size_t n, size_t s) 112 { 113 void *p = calloc(n, s); 114 if (p == NULL) 115 (*efunc)(1, "Cannot allocate %zu bytes", n); 116 return p; 117 } 118 119 void * 120 erealloc(void *p, size_t n) 121 { 122 void *q = realloc(p, n); 123 if (q == NULL) 124 (*efunc)(1, "Cannot re-allocate %zu bytes", n); 125 return q; 126 } 127 128 int 129 easprintf(char ** __restrict ret, const char * __restrict format, ...) 130 { 131 int rv; 132 va_list ap; 133 va_start(ap, format); 134 if ((rv = vasprintf(ret, format, ap)) == -1) 135 (*efunc)(1, "Cannot format string"); 136 va_end(ap); 137 return rv; 138 } 139 140