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 1.4 2005/11/13 00:07:42 swildner Exp $ 36 */ 37 38 #include <err.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #include <stdarg.h> 45 46 47 static FILE *err_file; /* file to use for error output */ 48 static void (*err_exit)(int); 49 50 /* 51 * This is declared to take a `void *' so that the caller is not required 52 * to include <stdio.h> first. However, it is really a `FILE *', and the 53 * manual page documents it as such. 54 */ 55 void 56 err_set_file(void *fp) 57 { 58 if (fp) 59 err_file = fp; 60 else 61 err_file = stderr; 62 } 63 64 void 65 err_set_exit(void (*ef)(int)) 66 { 67 err_exit = ef; 68 } 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((FILE *)0); 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((FILE *)0); 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 void 134 warn(const char *fmt, ...) 135 { 136 va_list ap; 137 va_start(ap, fmt); 138 vwarnc(errno, fmt, ap); 139 va_end(ap); 140 } 141 142 void 143 vwarn(const char *fmt, va_list ap) 144 { 145 vwarnc(errno, fmt, ap); 146 } 147 148 void 149 warnc(int code, const char *fmt, ...) 150 { 151 va_list ap; 152 va_start(ap, fmt); 153 vwarnc(code, fmt, ap); 154 va_end(ap); 155 } 156 157 void 158 vwarnc(int code, const char *fmt, va_list ap) 159 { 160 if (err_file == 0) 161 err_set_file((FILE *)0); 162 fprintf(err_file, "%s: ", getprogname()); 163 if (fmt != NULL) { 164 vfprintf(err_file, fmt, ap); 165 fprintf(err_file, ": "); 166 } 167 fprintf(err_file, "%s\n", strerror(code)); 168 } 169 170 void 171 warnx(const char *fmt, ...) 172 { 173 va_list ap; 174 va_start(ap, fmt); 175 vwarnx(fmt, ap); 176 va_end(ap); 177 } 178 179 void 180 vwarnx(const char *fmt, va_list ap) 181 { 182 if (err_file == 0) 183 err_set_file((FILE *)0); 184 fprintf(err_file, "%s: ", getprogname()); 185 if (fmt != NULL) 186 vfprintf(err_file, fmt, ap); 187 fprintf(err_file, "\n"); 188 } 189