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 71 _err(int eval, const char *fmt, ...) 72 { 73 va_list ap; 74 va_start(ap, fmt); 75 verrc(eval, errno, fmt, ap); 76 va_end(ap); 77 } 78 79 void 80 verr(int eval, const char *fmt, va_list ap) 81 { 82 verrc(eval, errno, fmt, ap); 83 } 84 85 void 86 errc(int eval, int code, const char *fmt, ...) 87 { 88 va_list ap; 89 va_start(ap, fmt); 90 verrc(eval, code, fmt, ap); 91 va_end(ap); 92 } 93 94 void 95 verrc(int eval, int code, const char *fmt, va_list ap) 96 { 97 if (err_file == 0) 98 err_set_file(NULL); 99 fprintf(err_file, "%s: ", _getprogname()); 100 if (fmt != NULL) { 101 vfprintf(err_file, fmt, ap); 102 fprintf(err_file, ": "); 103 } 104 fprintf(err_file, "%s\n", strerror(code)); 105 if (err_exit) 106 err_exit(eval); 107 exit(eval); 108 } 109 110 void 111 errx(int eval, const char *fmt, ...) 112 { 113 va_list ap; 114 va_start(ap, fmt); 115 verrx(eval, fmt, ap); 116 va_end(ap); 117 } 118 119 void 120 verrx(int eval, const char *fmt, va_list ap) 121 { 122 if (err_file == 0) 123 err_set_file(NULL); 124 fprintf(err_file, "%s: ", _getprogname()); 125 if (fmt != NULL) 126 vfprintf(err_file, fmt, ap); 127 fprintf(err_file, "\n"); 128 if (err_exit) 129 err_exit(eval); 130 exit(eval); 131 } 132 133 __weak_reference(_warn, warn); 134 135 void 136 _warn(const char *fmt, ...) 137 { 138 va_list ap; 139 va_start(ap, fmt); 140 vwarnc(errno, fmt, ap); 141 va_end(ap); 142 } 143 144 void 145 vwarn(const char *fmt, va_list ap) 146 { 147 vwarnc(errno, fmt, ap); 148 } 149 150 void 151 warnc(int code, const char *fmt, ...) 152 { 153 va_list ap; 154 va_start(ap, fmt); 155 vwarnc(code, fmt, ap); 156 va_end(ap); 157 } 158 159 void 160 vwarnc(int code, const char *fmt, va_list ap) 161 { 162 if (err_file == 0) 163 err_set_file(NULL); 164 fprintf(err_file, "%s: ", _getprogname()); 165 if (fmt != NULL) { 166 vfprintf(err_file, fmt, ap); 167 fprintf(err_file, ": "); 168 } 169 fprintf(err_file, "%s\n", strerror(code)); 170 } 171 172 void 173 warnx(const char *fmt, ...) 174 { 175 va_list ap; 176 va_start(ap, fmt); 177 vwarnx(fmt, ap); 178 va_end(ap); 179 } 180 181 void 182 vwarnx(const char *fmt, va_list ap) 183 { 184 if (err_file == 0) 185 err_set_file(NULL); 186 fprintf(err_file, "%s: ", _getprogname()); 187 if (fmt != NULL) 188 vfprintf(err_file, fmt, ap); 189 fprintf(err_file, "\n"); 190 } 191