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 "namespace.h" 33 #include <err.h> 34 #include <errno.h> 35 #include <stdarg.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include "un-namespace.h" 40 41 #include "libc_private.h" 42 43 static FILE *err_file; /* file to use for error output */ 44 static void (*err_exit)(int); 45 46 /* 47 * This is declared to take a `void *' so that the caller is not required 48 * to include <stdio.h> first. However, it is really a `FILE *', and the 49 * manual page documents it as such. 50 */ 51 void 52 err_set_file(void *fp) 53 { 54 if (fp) 55 err_file = fp; 56 else 57 err_file = stderr; 58 } 59 60 void 61 err_set_exit(void (*ef)(int)) 62 { 63 err_exit = ef; 64 } 65 66 __weak_reference(_err, err); 67 68 void 69 _err(int eval, const char *fmt, ...) 70 { 71 va_list ap; 72 va_start(ap, fmt); 73 verrc(eval, errno, fmt, ap); 74 va_end(ap); 75 } 76 77 void 78 verr(int eval, const char *fmt, va_list ap) 79 { 80 verrc(eval, errno, fmt, ap); 81 } 82 83 void 84 errc(int eval, int code, const char *fmt, ...) 85 { 86 va_list ap; 87 va_start(ap, fmt); 88 verrc(eval, code, fmt, ap); 89 va_end(ap); 90 } 91 92 void 93 verrc(int eval, int code, const char *fmt, va_list ap) 94 { 95 if (err_file == NULL) 96 err_set_file(NULL); 97 fprintf(err_file, "%s: ", _getprogname()); 98 if (fmt != NULL) { 99 vfprintf(err_file, fmt, ap); 100 fprintf(err_file, ": "); 101 } 102 fprintf(err_file, "%s\n", strerror(code)); 103 if (err_exit) 104 err_exit(eval); 105 exit(eval); 106 } 107 108 void 109 errx(int eval, const char *fmt, ...) 110 { 111 va_list ap; 112 va_start(ap, fmt); 113 verrx(eval, fmt, ap); 114 va_end(ap); 115 } 116 117 void 118 verrx(int eval, const char *fmt, va_list ap) 119 { 120 if (err_file == NULL) 121 err_set_file(NULL); 122 fprintf(err_file, "%s: ", _getprogname()); 123 if (fmt != NULL) 124 vfprintf(err_file, fmt, ap); 125 fprintf(err_file, "\n"); 126 if (err_exit) 127 err_exit(eval); 128 exit(eval); 129 } 130 131 __weak_reference(_warn, warn); 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 int saved_errno; 161 162 saved_errno = errno; 163 if (err_file == NULL) 164 err_set_file(NULL); 165 fprintf(err_file, "%s: ", _getprogname()); 166 if (fmt != NULL) { 167 vfprintf(err_file, fmt, ap); 168 fprintf(err_file, ": "); 169 } 170 fprintf(err_file, "%s\n", strerror(code)); 171 errno = saved_errno; 172 } 173 174 void 175 warnx(const char *fmt, ...) 176 { 177 va_list ap; 178 va_start(ap, fmt); 179 vwarnx(fmt, ap); 180 va_end(ap); 181 } 182 183 void 184 vwarnx(const char *fmt, va_list ap) 185 { 186 int saved_errno; 187 188 saved_errno = errno; 189 if (err_file == NULL) 190 err_set_file(NULL); 191 fprintf(err_file, "%s: ", _getprogname()); 192 if (fmt != NULL) 193 vfprintf(err_file, fmt, ap); 194 fprintf(err_file, "\n"); 195 errno = saved_errno; 196 } 197