1 /* $NetBSD: com_err.c,v 1.3 2019/12/15 22:50:47 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36
37 #include <config.h>
38
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <krb5/roken.h>
43 #include <krb5/com_err.h>
44
45 struct et_list *_et_list = NULL;
46
47
48 KRB5_LIB_FUNCTION const char * KRB5_LIB_CALL
error_message(long code)49 error_message (long code)
50 {
51 static char msg[128];
52 const char *p = com_right(_et_list, code);
53 if (p == NULL) {
54 if (code < 0)
55 snprintf(msg, sizeof(msg), "Unknown error %ld", code);
56 else
57 p = strerror(code);
58 }
59 if (p != NULL && *p != '\0') {
60 strlcpy(msg, p, sizeof(msg));
61 } else
62 snprintf(msg, sizeof(msg), "Unknown error %ld", code);
63 return msg;
64 }
65
66 KRB5_LIB_FUNCTION int KRB5_LIB_CALL
init_error_table(const char ** msgs,long base,int count)67 init_error_table(const char **msgs, long base, int count)
68 {
69 initialize_error_table_r(&_et_list, msgs, count, base);
70 return 0;
71 }
72
73 static void KRB5_CALLCONV
74 default_proc (const char *whoami, long code, const char *fmt, va_list args)
75 __attribute__ ((__format__ (__printf__, 3, 0)));
76
77 static void KRB5_CALLCONV
default_proc(const char * whoami,long code,const char * fmt,va_list args)78 default_proc (const char *whoami, long code, const char *fmt, va_list args)
79 {
80 if (whoami)
81 fprintf(stderr, "%s: ", whoami);
82 if (code)
83 fprintf(stderr, "%s ", error_message(code));
84 if (fmt)
85 vfprintf(stderr, fmt, args);
86 fprintf(stderr, "\r\n"); /* ??? */
87 }
88
89 static errf com_err_hook = default_proc;
90
91 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
com_err_va(const char * whoami,long code,const char * fmt,va_list args)92 com_err_va (const char *whoami,
93 long code,
94 const char *fmt,
95 va_list args)
96 {
97 (*com_err_hook) (whoami, code, fmt, args);
98 }
99
100 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
com_err(const char * whoami,long code,const char * fmt,...)101 com_err (const char *whoami,
102 long code,
103 const char *fmt,
104 ...)
105 {
106 va_list ap;
107 va_start(ap, fmt);
108 com_err_va (whoami, code, fmt, ap);
109 va_end(ap);
110 }
111
112 KRB5_LIB_FUNCTION errf KRB5_LIB_CALL
set_com_err_hook(errf new)113 set_com_err_hook (errf new)
114 {
115 errf old = com_err_hook;
116
117 if (new)
118 com_err_hook = new;
119 else
120 com_err_hook = default_proc;
121
122 return old;
123 }
124
125 KRB5_LIB_FUNCTION errf KRB5_LIB_CALL
reset_com_err_hook(void)126 reset_com_err_hook (void)
127 {
128 return set_com_err_hook(NULL);
129 }
130
131 #define ERRCODE_RANGE 8 /* # of bits to shift table number */
132 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */
133
134 static const char char_set[] =
135 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
136
137 static char buf[6];
138
139 KRB5_LIB_FUNCTION const char * KRB5_LIB_CALL
error_table_name(int num)140 error_table_name(int num)
141 {
142 int ch;
143 int i;
144 char *p;
145
146 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
147 p = buf;
148 num >>= ERRCODE_RANGE;
149 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
150 num &= 077777777;
151 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
152 for (i = 4; i >= 0; i--) {
153 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
154 if (ch != 0)
155 *p++ = char_set[ch-1];
156 }
157 *p = '\0';
158 return(buf);
159 }
160
161 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
add_to_error_table(struct et_list * new_table)162 add_to_error_table(struct et_list *new_table)
163 {
164 struct et_list *et;
165
166 for (et = _et_list; et; et = et->next) {
167 if (et->table->base == new_table->table->base)
168 return;
169 }
170
171 new_table->next = _et_list;
172 _et_list = new_table;
173 }
174