1 /* 2 * Copyright (c) 1997 - 2002 Kungliga Tekniska H�gskolan 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 #ifdef HAVE_CONFIG_H 35 #include <config.h> 36 RCSID("$Id: com_err.c 14930 2005-04-24 19:43:06Z lha $"); 37 #endif 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <roken.h> 42 #include "com_err.h" 43 44 struct et_list *_et_list = NULL; 45 46 47 const char * 48 error_message (long code) 49 { 50 static char msg[128]; 51 const char *p = com_right(_et_list, code); 52 if (p == NULL) { 53 if (code < 0) 54 snprintf(msg, sizeof(msg), "Unknown error %ld", code); 55 else 56 p = strerror(code); 57 } 58 if (p != NULL && *p != '\0') { 59 strlcpy(msg, p, sizeof(msg)); 60 } else 61 snprintf(msg, sizeof(msg), "Unknown error %ld", code); 62 return msg; 63 } 64 65 int 66 init_error_table(const char **msgs, long base, int count) 67 { 68 initialize_error_table_r(&_et_list, msgs, count, base); 69 return 0; 70 } 71 72 static void 73 default_proc (const char *whoami, long code, const char *fmt, va_list args) 74 __attribute__((__format__(__printf__, 3, 0))); 75 76 static void 77 default_proc (const char *whoami, long code, const char *fmt, va_list args) 78 { 79 if (whoami) 80 fprintf(stderr, "%s: ", whoami); 81 if (code) 82 fprintf(stderr, "%s ", error_message(code)); 83 if (fmt) 84 vfprintf(stderr, fmt, args); 85 fprintf(stderr, "\r\n"); /* ??? */ 86 } 87 88 static errf com_err_hook = default_proc; 89 90 void 91 com_err_va (const char *whoami, 92 long code, 93 const char *fmt, 94 va_list args) 95 { 96 (*com_err_hook) (whoami, code, fmt, args); 97 } 98 99 void 100 com_err (const char *whoami, 101 long code, 102 const char *fmt, 103 ...) 104 { 105 va_list ap; 106 va_start(ap, fmt); 107 com_err_va (whoami, code, fmt, ap); 108 va_end(ap); 109 } 110 111 errf 112 set_com_err_hook (errf new) 113 { 114 errf old = com_err_hook; 115 116 if (new) 117 com_err_hook = new; 118 else 119 com_err_hook = default_proc; 120 121 return old; 122 } 123 124 errf 125 reset_com_err_hook (void) 126 { 127 return set_com_err_hook(NULL); 128 } 129 130 #define ERRCODE_RANGE 8 /* # of bits to shift table number */ 131 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */ 132 133 static const char char_set[] = 134 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; 135 136 static char buf[6]; 137 138 const char * 139 error_table_name(int num) 140 { 141 int ch; 142 int i; 143 char *p; 144 145 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */ 146 p = buf; 147 num >>= ERRCODE_RANGE; 148 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */ 149 num &= 077777777; 150 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */ 151 for (i = 4; i >= 0; i--) { 152 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1); 153 if (ch != 0) 154 *p++ = char_set[ch-1]; 155 } 156 *p = '\0'; 157 return(buf); 158 } 159 160 void 161 add_to_error_table(struct et_list *new_table) 162 { 163 struct et_list *et; 164 165 for (et = _et_list; et; et = et->next) { 166 if (et->table->base == new_table->table->base) 167 return; 168 } 169 170 new_table->next = _et_list; 171 _et_list = new_table; 172 } 173