1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if defined(LIBC_SCCS) && !defined(lint) 33 static char sccsid[] = "@(#)err.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include "namespace.h" 39 #include <err.h> 40 #include <errno.h> 41 #include <stdarg.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include "un-namespace.h" 46 47 #include "libc_private.h" 48 49 static FILE *err_file; /* file to use for error output */ 50 static void (*err_exit)(int); 51 52 /* 53 * This is declared to take a `void *' so that the caller is not required 54 * to include <stdio.h> first. However, it is really a `FILE *', and the 55 * manual page documents it as such. 56 */ 57 void 58 err_set_file(void *fp) 59 { 60 if (fp) 61 err_file = fp; 62 else 63 err_file = stderr; 64 } 65 66 void 67 err_set_exit(void (*ef)(int)) 68 { 69 err_exit = ef; 70 } 71 72 __weak_reference(_err, err); 73 74 void 75 _err(int eval, const char *fmt, ...) 76 { 77 va_list ap; 78 va_start(ap, fmt); 79 verrc(eval, errno, fmt, ap); 80 va_end(ap); 81 } 82 83 void 84 verr(int eval, const char *fmt, va_list ap) 85 { 86 verrc(eval, errno, fmt, ap); 87 } 88 89 void 90 errc(int eval, int code, const char *fmt, ...) 91 { 92 va_list ap; 93 va_start(ap, fmt); 94 verrc(eval, code, fmt, ap); 95 va_end(ap); 96 } 97 98 void 99 verrc(int eval, int code, const char *fmt, va_list ap) 100 { 101 if (err_file == NULL) 102 err_set_file(NULL); 103 fprintf(err_file, "%s: ", _getprogname()); 104 if (fmt != NULL) { 105 vfprintf(err_file, fmt, ap); 106 fprintf(err_file, ": "); 107 } 108 fprintf(err_file, "%s\n", strerror(code)); 109 if (err_exit) 110 err_exit(eval); 111 exit(eval); 112 } 113 114 void 115 errx(int eval, const char *fmt, ...) 116 { 117 va_list ap; 118 va_start(ap, fmt); 119 verrx(eval, fmt, ap); 120 va_end(ap); 121 } 122 123 void 124 verrx(int eval, const char *fmt, va_list ap) 125 { 126 if (err_file == NULL) 127 err_set_file(NULL); 128 fprintf(err_file, "%s: ", _getprogname()); 129 if (fmt != NULL) 130 vfprintf(err_file, fmt, ap); 131 fprintf(err_file, "\n"); 132 if (err_exit) 133 err_exit(eval); 134 exit(eval); 135 } 136 137 __weak_reference(_warn, warn); 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 == NULL) 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 == NULL) 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