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 <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include "com_err.h" 39 40 struct et_list *_et_list = NULL; 41 42 43 KRB5_LIB_FUNCTION const char * KRB5_LIB_CALL 44 error_message (long code) 45 { 46 static char msg[128]; 47 const char *p = com_right(_et_list, code); 48 if (p == NULL) { 49 if (code < 0) 50 snprintf(msg, sizeof(msg), "Unknown error %ld", code); 51 else 52 p = strerror(code); 53 } 54 if (p != NULL && *p != '\0') { 55 strlcpy(msg, p, sizeof(msg)); 56 } else 57 snprintf(msg, sizeof(msg), "Unknown error %ld", code); 58 return msg; 59 } 60 61 KRB5_LIB_FUNCTION int KRB5_LIB_CALL 62 init_error_table(const char **msgs, long base, int count) 63 { 64 initialize_error_table_r(&_et_list, msgs, count, base); 65 return 0; 66 } 67 68 static void KRB5_CALLCONV 69 default_proc (const char *whoami, long code, const char *fmt, va_list args) 70 __attribute__((__format__(__printf__, 3, 0))); 71 72 static void KRB5_CALLCONV 73 default_proc (const char *whoami, long code, const char *fmt, va_list args) 74 { 75 if (whoami) 76 fprintf(stderr, "%s: ", whoami); 77 if (code) 78 fprintf(stderr, "%s ", error_message(code)); 79 if (fmt) 80 vfprintf(stderr, fmt, args); 81 fprintf(stderr, "\r\n"); /* ??? */ 82 } 83 84 static errf com_err_hook = default_proc; 85 86 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 87 com_err_va (const char *whoami, 88 long code, 89 const char *fmt, 90 va_list args) 91 { 92 (*com_err_hook) (whoami, code, fmt, args); 93 } 94 95 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 96 com_err (const char *whoami, 97 long code, 98 const char *fmt, 99 ...) 100 { 101 va_list ap; 102 va_start(ap, fmt); 103 com_err_va (whoami, code, fmt, ap); 104 va_end(ap); 105 } 106 107 KRB5_LIB_FUNCTION errf KRB5_LIB_CALL 108 set_com_err_hook (errf new) 109 { 110 errf old = com_err_hook; 111 112 if (new) 113 com_err_hook = new; 114 else 115 com_err_hook = default_proc; 116 117 return old; 118 } 119 120 KRB5_LIB_FUNCTION errf KRB5_LIB_CALL 121 reset_com_err_hook (void) 122 { 123 return set_com_err_hook(NULL); 124 } 125 126 #define ERRCODE_RANGE 8 /* # of bits to shift table number */ 127 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */ 128 129 static const char char_set[] = 130 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; 131 132 static char buf[6]; 133 134 KRB5_LIB_FUNCTION const char * KRB5_LIB_CALL 135 error_table_name(int num) 136 { 137 int ch; 138 int i; 139 char *p; 140 141 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */ 142 p = buf; 143 num >>= ERRCODE_RANGE; 144 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */ 145 num &= 077777777; 146 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */ 147 for (i = 4; i >= 0; i--) { 148 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1); 149 if (ch != 0) 150 *p++ = char_set[ch-1]; 151 } 152 *p = '\0'; 153 return(buf); 154 } 155 156 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 157 add_to_error_table(struct et_list *new_table) 158 { 159 struct et_list *et; 160 161 for (et = _et_list; et; et = et->next) { 162 if (et->table->base == new_table->table->base) 163 return; 164 } 165 166 new_table->next = _et_list; 167 _et_list = new_table; 168 } 169