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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * From: @(#)err.c 8.1 (Berkeley) 6/4/93 33 * 34 * $FreeBSD: src/lib/libc/gen/err.c,v 1.6 1999/08/27 23:58:33 peter Exp $ 35 * $DragonFly: src/lib/libc/gen/err.c,v 1.5 2006/02/12 21:14:11 dillon Exp $ 36 */ 37 38 #include <sys/cdefs.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include <stdarg.h> 46 47 48 static FILE *err_file; /* file to use for error output */ 49 static void (*err_exit)(int); 50 51 /* 52 * This is declared to take a `void *' so that the caller is not required 53 * to include <stdio.h> first. However, it is really a `FILE *', and the 54 * manual page documents it as such. 55 */ 56 void 57 err_set_file(void *fp) 58 { 59 if (fp) 60 err_file = fp; 61 else 62 err_file = stderr; 63 } 64 65 void 66 err_set_exit(void (*ef)(int)) 67 { 68 err_exit = ef; 69 } 70 71 void 72 err(int eval, const char *fmt, ...) 73 { 74 va_list ap; 75 va_start(ap, fmt); 76 verrc(eval, errno, fmt, ap); 77 va_end(ap); 78 } 79 80 void 81 verr(int eval, const char *fmt, va_list ap) 82 { 83 verrc(eval, errno, fmt, ap); 84 } 85 86 void 87 errc(int eval, int code, const char *fmt, ...) 88 { 89 va_list ap; 90 va_start(ap, fmt); 91 verrc(eval, code, fmt, ap); 92 va_end(ap); 93 } 94 95 void 96 verrc(int eval, int code, const char *fmt, va_list ap) 97 { 98 if (err_file == 0) 99 err_set_file((FILE *)0); 100 fprintf(err_file, "%s: ", getprogname()); 101 if (fmt != NULL) { 102 vfprintf(err_file, fmt, ap); 103 fprintf(err_file, ": "); 104 } 105 fprintf(err_file, "%s\n", strerror(code)); 106 if (err_exit) 107 err_exit(eval); 108 exit(eval); 109 } 110 111 void 112 errx(int eval, const char *fmt, ...) 113 { 114 va_list ap; 115 va_start(ap, fmt); 116 verrx(eval, fmt, ap); 117 va_end(ap); 118 } 119 120 void 121 verrx(int eval, const char *fmt, va_list ap) 122 { 123 if (err_file == 0) 124 err_set_file((FILE *)0); 125 fprintf(err_file, "%s: ", getprogname()); 126 if (fmt != NULL) 127 vfprintf(err_file, fmt, ap); 128 fprintf(err_file, "\n"); 129 if (err_exit) 130 err_exit(eval); 131 exit(eval); 132 } 133 134 void 135 _warn(const char *fmt, ...) 136 { 137 va_list ap; 138 va_start(ap, fmt); 139 vwarnc(errno, fmt, ap); 140 va_end(ap); 141 } 142 __weak_reference(_warn,warn); 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((FILE *)0); 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((FILE *)0); 186 fprintf(err_file, "%s: ", getprogname()); 187 if (fmt != NULL) 188 vfprintf(err_file, fmt, ap); 189 fprintf(err_file, "\n"); 190 } 191