1 /* 2 * Copyright (c) 1997 - 2000 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,v 1.15 2000/04/04 22:04:55 assar Exp $"); 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 p = strerror(code); 54 if (p != NULL && *p != '\0') { 55 strncpy(msg, p, sizeof(msg) - 1); 56 msg[sizeof(msg) - 1] = 0; 57 } else 58 sprintf(msg, "Unknown error %ld", code); 59 return msg; 60 } 61 62 int 63 init_error_table(const char **msgs, long base, int count) 64 { 65 initialize_error_table_r(&_et_list, msgs, count, base); 66 return 0; 67 } 68 69 static void 70 default_proc (const char *whoami, long code, const char *fmt, va_list args) 71 { 72 if (whoami) 73 fprintf(stderr, "%s: ", whoami); 74 if (code) 75 fprintf(stderr, "%s ", error_message(code)); 76 if (fmt) 77 vfprintf(stderr, fmt, args); 78 fprintf(stderr, "\r\n"); /* ??? */ 79 } 80 81 static errf com_err_hook = default_proc; 82 83 void 84 com_err_va (const char *whoami, 85 long code, 86 const char *fmt, 87 va_list args) 88 { 89 (*com_err_hook) (whoami, code, fmt, args); 90 } 91 92 void 93 com_err (const char *whoami, 94 long code, 95 const char *fmt, 96 ...) 97 { 98 va_list ap; 99 va_start(ap, fmt); 100 com_err_va (whoami, code, fmt, ap); 101 va_end(ap); 102 } 103 104 errf 105 set_com_err_hook (errf new) 106 { 107 errf old = com_err_hook; 108 109 if (new) 110 com_err_hook = new; 111 else 112 com_err_hook = default_proc; 113 114 return old; 115 } 116 117 errf 118 reset_com_err_hook (void) 119 { 120 return set_com_err_hook(NULL); 121 } 122 123 #define ERRCODE_RANGE 8 /* # of bits to shift table number */ 124 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */ 125 126 static const char char_set[] = 127 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; 128 129 static char buf[6]; 130 131 const char * 132 error_table_name(int num) 133 { 134 int ch; 135 int i; 136 char *p; 137 138 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */ 139 p = buf; 140 num >>= ERRCODE_RANGE; 141 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */ 142 num &= 077777777; 143 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */ 144 for (i = 4; i >= 0; i--) { 145 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1); 146 if (ch != 0) 147 *p++ = char_set[ch-1]; 148 } 149 *p = '\0'; 150 return(buf); 151 } 152