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
error_message(long code)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
init_error_table(const char ** msgs,long base,int count)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
default_proc(const char * whoami,long code,const char * fmt,va_list args)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
com_err_va(const char * whoami,long code,const char * fmt,va_list args)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
com_err(const char * whoami,long code,const char * fmt,...)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
set_com_err_hook(errf new)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
reset_com_err_hook(void)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
error_table_name(int num)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
add_to_error_table(struct et_list * new_table)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