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 #include <sys/cdefs.h> 33 __SCCSID("@(#)err.c 8.1 (Berkeley) 6/4/93"); 34 __FBSDID("$FreeBSD$"); 35 36 #include "namespace.h" 37 #include <err.h> 38 #include <errno.h> 39 #include <stdarg.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include "un-namespace.h" 44 45 #include "libc_private.h" 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 __weak_reference(_err, err); 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 == NULL) 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 == NULL) 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 138 _warn(const char *fmt, ...) 139 { 140 va_list ap; 141 va_start(ap, fmt); 142 vwarnc(errno, fmt, ap); 143 va_end(ap); 144 } 145 146 void 147 vwarn(const char *fmt, va_list ap) 148 { 149 vwarnc(errno, fmt, ap); 150 } 151 152 void 153 warnc(int code, const char *fmt, ...) 154 { 155 va_list ap; 156 va_start(ap, fmt); 157 vwarnc(code, fmt, ap); 158 va_end(ap); 159 } 160 161 void 162 vwarnc(int code, const char *fmt, va_list ap) 163 { 164 int saved_errno; 165 166 saved_errno = errno; 167 if (err_file == NULL) 168 err_set_file(NULL); 169 fprintf(err_file, "%s: ", _getprogname()); 170 if (fmt != NULL) { 171 vfprintf(err_file, fmt, ap); 172 fprintf(err_file, ": "); 173 } 174 fprintf(err_file, "%s\n", strerror(code)); 175 errno = saved_errno; 176 } 177 178 void 179 warnx(const char *fmt, ...) 180 { 181 va_list ap; 182 va_start(ap, fmt); 183 vwarnx(fmt, ap); 184 va_end(ap); 185 } 186 187 void 188 vwarnx(const char *fmt, va_list ap) 189 { 190 int saved_errno; 191 192 saved_errno = errno; 193 if (err_file == NULL) 194 err_set_file(NULL); 195 fprintf(err_file, "%s: ", _getprogname()); 196 if (fmt != NULL) 197 vfprintf(err_file, fmt, ap); 198 fprintf(err_file, "\n"); 199 errno = saved_errno; 200 } 201