1 /* $NetBSD: com_err.c,v 1.3 2019/12/15 22:50:47 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 37 #include <config.h> 38 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <krb5/roken.h> 43 #include <krb5/com_err.h> 44 45 struct et_list *_et_list = NULL; 46 47 48 KRB5_LIB_FUNCTION const char * KRB5_LIB_CALL 49 error_message (long code) 50 { 51 static char msg[128]; 52 const char *p = com_right(_et_list, code); 53 if (p == NULL) { 54 if (code < 0) 55 snprintf(msg, sizeof(msg), "Unknown error %ld", code); 56 else 57 p = strerror(code); 58 } 59 if (p != NULL && *p != '\0') { 60 strlcpy(msg, p, sizeof(msg)); 61 } else 62 snprintf(msg, sizeof(msg), "Unknown error %ld", code); 63 return msg; 64 } 65 66 KRB5_LIB_FUNCTION int KRB5_LIB_CALL 67 init_error_table(const char **msgs, long base, int count) 68 { 69 initialize_error_table_r(&_et_list, msgs, count, base); 70 return 0; 71 } 72 73 static void KRB5_CALLCONV 74 default_proc (const char *whoami, long code, const char *fmt, va_list args) 75 __attribute__ ((__format__ (__printf__, 3, 0))); 76 77 static void KRB5_CALLCONV 78 default_proc (const char *whoami, long code, const char *fmt, va_list args) 79 { 80 if (whoami) 81 fprintf(stderr, "%s: ", whoami); 82 if (code) 83 fprintf(stderr, "%s ", error_message(code)); 84 if (fmt) 85 vfprintf(stderr, fmt, args); 86 fprintf(stderr, "\r\n"); /* ??? */ 87 } 88 89 static errf com_err_hook = default_proc; 90 91 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 92 com_err_va (const char *whoami, 93 long code, 94 const char *fmt, 95 va_list args) 96 { 97 (*com_err_hook) (whoami, code, fmt, args); 98 } 99 100 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 101 com_err (const char *whoami, 102 long code, 103 const char *fmt, 104 ...) 105 { 106 va_list ap; 107 va_start(ap, fmt); 108 com_err_va (whoami, code, fmt, ap); 109 va_end(ap); 110 } 111 112 KRB5_LIB_FUNCTION errf KRB5_LIB_CALL 113 set_com_err_hook (errf new) 114 { 115 errf old = com_err_hook; 116 117 if (new) 118 com_err_hook = new; 119 else 120 com_err_hook = default_proc; 121 122 return old; 123 } 124 125 KRB5_LIB_FUNCTION errf KRB5_LIB_CALL 126 reset_com_err_hook (void) 127 { 128 return set_com_err_hook(NULL); 129 } 130 131 #define ERRCODE_RANGE 8 /* # of bits to shift table number */ 132 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */ 133 134 static const char char_set[] = 135 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; 136 137 static char buf[6]; 138 139 KRB5_LIB_FUNCTION const char * KRB5_LIB_CALL 140 error_table_name(int num) 141 { 142 int ch; 143 int i; 144 char *p; 145 146 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */ 147 p = buf; 148 num >>= ERRCODE_RANGE; 149 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */ 150 num &= 077777777; 151 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */ 152 for (i = 4; i >= 0; i--) { 153 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1); 154 if (ch != 0) 155 *p++ = char_set[ch-1]; 156 } 157 *p = '\0'; 158 return(buf); 159 } 160 161 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 162 add_to_error_table(struct et_list *new_table) 163 { 164 struct et_list *et; 165 166 for (et = _et_list; et; et = et->next) { 167 if (et->table->base == new_table->table->base) 168 return; 169 } 170 171 new_table->next = _et_list; 172 _et_list = new_table; 173 } 174