1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)err.c 8.1 (Berkeley) 6/4/93 30 * $FreeBSD: src/lib/libc/gen/err.c,v 1.15 2008/04/03 20:36:44 imp Exp $ 31 * $DragonFly: src/lib/libc/gen/err.c,v 1.5 2006/02/12 21:14:11 dillon Exp $ 32 */ 33 34 #include "namespace.h" 35 #include <err.h> 36 #include <errno.h> 37 #include <stdarg.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include "un-namespace.h" 42 43 #include "libc_private.h" 44 45 static FILE *err_file; /* file to use for error output */ 46 static void (*err_exit)(int); 47 48 /* 49 * This is declared to take a `void *' so that the caller is not required 50 * to include <stdio.h> first. However, it is really a `FILE *', and the 51 * manual page documents it as such. 52 */ 53 void 54 err_set_file(void *fp) 55 { 56 if (fp) 57 err_file = fp; 58 else 59 err_file = stderr; 60 } 61 62 void 63 err_set_exit(void (*ef)(int)) 64 { 65 err_exit = ef; 66 } 67 68 __weak_reference(_err, err); 69 70 void _err(int, const char *, ...) __printflike(2, 3); 71 72 void 73 _err(int eval, const char *fmt, ...) 74 { 75 va_list ap; 76 va_start(ap, fmt); 77 verrc(eval, errno, fmt, ap); 78 va_end(ap); 79 } 80 81 void 82 verr(int eval, const char *fmt, va_list ap) 83 { 84 verrc(eval, errno, fmt, ap); 85 } 86 87 void 88 errc(int eval, int code, const char *fmt, ...) 89 { 90 va_list ap; 91 va_start(ap, fmt); 92 verrc(eval, code, fmt, ap); 93 va_end(ap); 94 } 95 96 void 97 verrc(int eval, int code, const char *fmt, va_list ap) 98 { 99 if (err_file == 0) 100 err_set_file(NULL); 101 fprintf(err_file, "%s: ", _getprogname()); 102 if (fmt != NULL) { 103 vfprintf(err_file, fmt, ap); 104 fprintf(err_file, ": "); 105 } 106 fprintf(err_file, "%s\n", strerror(code)); 107 if (err_exit) 108 err_exit(eval); 109 exit(eval); 110 } 111 112 void 113 errx(int eval, const char *fmt, ...) 114 { 115 va_list ap; 116 va_start(ap, fmt); 117 verrx(eval, fmt, ap); 118 va_end(ap); 119 } 120 121 void 122 verrx(int eval, const char *fmt, va_list ap) 123 { 124 if (err_file == 0) 125 err_set_file(NULL); 126 fprintf(err_file, "%s: ", _getprogname()); 127 if (fmt != NULL) 128 vfprintf(err_file, fmt, ap); 129 fprintf(err_file, "\n"); 130 if (err_exit) 131 err_exit(eval); 132 exit(eval); 133 } 134 135 __weak_reference(_warn, warn); 136 137 void _warn(const char *, ...) __printflike(1, 2); 138 139 void 140 _warn(const char *fmt, ...) 141 { 142 va_list ap; 143 va_start(ap, fmt); 144 vwarnc(errno, fmt, ap); 145 va_end(ap); 146 } 147 148 void 149 vwarn(const char *fmt, va_list ap) 150 { 151 vwarnc(errno, fmt, ap); 152 } 153 154 void 155 warnc(int code, const char *fmt, ...) 156 { 157 va_list ap; 158 va_start(ap, fmt); 159 vwarnc(code, fmt, ap); 160 va_end(ap); 161 } 162 163 void 164 vwarnc(int code, const char *fmt, va_list ap) 165 { 166 if (err_file == 0) 167 err_set_file(NULL); 168 fprintf(err_file, "%s: ", _getprogname()); 169 if (fmt != NULL) { 170 vfprintf(err_file, fmt, ap); 171 fprintf(err_file, ": "); 172 } 173 fprintf(err_file, "%s\n", strerror(code)); 174 } 175 176 void 177 warnx(const char *fmt, ...) 178 { 179 va_list ap; 180 va_start(ap, fmt); 181 vwarnx(fmt, ap); 182 va_end(ap); 183 } 184 185 void 186 vwarnx(const char *fmt, va_list ap) 187 { 188 if (err_file == 0) 189 err_set_file(NULL); 190 fprintf(err_file, "%s: ", _getprogname()); 191 if (fmt != NULL) 192 vfprintf(err_file, fmt, ap); 193 fprintf(err_file, "\n"); 194 } 195