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