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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)err.c 8.1 (Berkeley) 6/4/93"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 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(eval, fmt, ap) 83 int eval; 84 const char *fmt; 85 va_list ap; 86 { 87 verrc(eval, errno, fmt, ap); 88 } 89 90 void 91 errc(int eval, int code, const char *fmt, ...) 92 { 93 va_list ap; 94 va_start(ap, fmt); 95 verrc(eval, code, fmt, ap); 96 va_end(ap); 97 } 98 99 void 100 verrc(int eval, int code, const char *fmt, va_list ap) 101 { 102 if (err_file == 0) 103 err_set_file((FILE *)0); 104 fprintf(err_file, "%s: ", _getprogname()); 105 if (fmt != NULL) { 106 vfprintf(err_file, fmt, ap); 107 fprintf(err_file, ": "); 108 } 109 fprintf(err_file, "%s\n", strerror(code)); 110 if (err_exit) 111 err_exit(eval); 112 exit(eval); 113 } 114 115 void 116 errx(int eval, const char *fmt, ...) 117 { 118 va_list ap; 119 va_start(ap, fmt); 120 verrx(eval, fmt, ap); 121 va_end(ap); 122 } 123 124 void 125 verrx(int eval, const char *fmt, va_list ap) 126 { 127 if (err_file == 0) 128 err_set_file((FILE *)0); 129 fprintf(err_file, "%s: ", _getprogname()); 130 if (fmt != NULL) 131 vfprintf(err_file, fmt, ap); 132 fprintf(err_file, "\n"); 133 if (err_exit) 134 err_exit(eval); 135 exit(eval); 136 } 137 138 __weak_reference(_warn, warn); 139 140 void 141 _warn(const char *fmt, ...) 142 { 143 va_list ap; 144 va_start(ap, fmt); 145 vwarnc(errno, fmt, ap); 146 va_end(ap); 147 } 148 149 void 150 vwarn(const char *fmt, va_list ap) 151 { 152 vwarnc(errno, fmt, ap); 153 } 154 155 void 156 warnc(int code, const char *fmt, ...) 157 { 158 va_list ap; 159 va_start(ap, fmt); 160 vwarnc(code, fmt, ap); 161 va_end(ap); 162 } 163 164 void 165 vwarnc(int code, const char *fmt, va_list ap) 166 { 167 if (err_file == 0) 168 err_set_file((FILE *)0); 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 } 176 177 void 178 warnx(const char *fmt, ...) 179 { 180 va_list ap; 181 va_start(ap, fmt); 182 vwarnx(fmt, ap); 183 va_end(ap); 184 } 185 186 void 187 vwarnx(const char *fmt, va_list ap) 188 { 189 if (err_file == 0) 190 err_set_file((FILE *)0); 191 fprintf(err_file, "%s: ", _getprogname()); 192 if (fmt != NULL) 193 vfprintf(err_file, fmt, ap); 194 fprintf(err_file, "\n"); 195 } 196