1/*	$NetBSD: warn.c,v 1.3 2019/12/15 22:50:50 christos Exp $	*/
2
3/*
4 * Copyright (c) 1997 - 2001 Kungliga Tekniska H��gskolan
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#include "krb5_locl.h"
37#include <err.h>
38
39static krb5_error_code _warnerr(krb5_context context, int do_errtext,
40	 krb5_error_code code, int level, const char *fmt, va_list ap)
41	__attribute__ ((__format__ (__printf__, 5, 0)));
42
43static krb5_error_code
44_warnerr(krb5_context context, int do_errtext,
45	 krb5_error_code code, int level, const char *fmt, va_list ap)
46{
47    char xfmt[7] = "";
48    const char *args[2], **arg;
49    char *msg = NULL;
50    const char *err_str = NULL;
51    krb5_error_code ret;
52
53    args[0] = args[1] = NULL;
54    arg = args;
55    if(fmt){
56	strlcat(xfmt, "%s", sizeof(xfmt));
57	if(do_errtext)
58	    strlcat(xfmt, ": ", sizeof(xfmt));
59	ret = vasprintf(&msg, fmt, ap);
60	if(ret < 0 || msg == NULL)
61	    return ENOMEM;
62	*arg++ = msg;
63    }
64    if(context && do_errtext){
65	strlcat(xfmt, "%s", sizeof(xfmt));
66
67	err_str = krb5_get_error_message(context, code);
68	if (err_str != NULL) {
69	    *arg = err_str;
70	} else {
71	    *arg= "<unknown error>";
72	}
73    }
74
75    if(context && context->warn_dest)
76	krb5_log(context, context->warn_dest, level, xfmt, args[0], args[1]);
77    else
78	warnx(xfmt, args[0], args[1]);
79    free(msg);
80    krb5_free_error_message(context, err_str);
81    return 0;
82}
83
84#define FUNC(ETEXT, CODE, LEVEL)					\
85    krb5_error_code ret;						\
86    va_list ap;								\
87    va_start(ap, fmt);							\
88    ret = _warnerr(context, ETEXT, CODE, LEVEL, fmt, ap); 		\
89    va_end(ap);
90
91#define FUNC_NORET(ETEXT, CODE, LEVEL)					\
92    va_list ap;								\
93    va_start(ap, fmt);							\
94    (void) _warnerr(context, ETEXT, CODE, LEVEL, fmt, ap); 		\
95    va_end(ap);
96
97#undef __attribute__
98#define __attribute__(X)
99
100/**
101 * Log a warning to the log, default stderr, include the error from
102 * the last failure.
103 *
104 * @param context A Kerberos 5 context.
105 * @param code error code of the last error
106 * @param fmt message to print
107 * @param ap arguments
108 *
109 * @ingroup krb5_error
110 */
111
112KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
113krb5_vwarn(krb5_context context, krb5_error_code code,
114	   const char *fmt, va_list ap)
115     __attribute__ ((__format__ (__printf__, 3, 0)))
116{
117    return _warnerr(context, 1, code, 1, fmt, ap);
118}
119
120/**
121 * Log a warning to the log, default stderr, include the error from
122 * the last failure.
123 *
124 * @param context A Kerberos 5 context.
125 * @param code error code of the last error
126 * @param fmt message to print
127 *
128 * @ingroup krb5_error
129 */
130
131KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
132krb5_warn(krb5_context context, krb5_error_code code, const char *fmt, ...)
133     __attribute__ ((__format__ (__printf__, 3, 4)))
134{
135    FUNC(1, code, 1);
136    return ret;
137}
138
139/**
140 * Log a warning to the log, default stderr.
141 *
142 * @param context A Kerberos 5 context.
143 * @param fmt message to print
144 * @param ap arguments
145 *
146 * @ingroup krb5_error
147 */
148
149KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
150krb5_vwarnx(krb5_context context, const char *fmt, va_list ap)
151     __attribute__ ((__format__ (__printf__, 2, 0)))
152{
153    return _warnerr(context, 0, 0, 1, fmt, ap);
154}
155
156/**
157 * Log a warning to the log, default stderr.
158 *
159 * @param context A Kerberos 5 context.
160 * @param fmt message to print
161 *
162 * @ingroup krb5_error
163 */
164
165KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
166krb5_warnx(krb5_context context, const char *fmt, ...)
167     __attribute__ ((__format__ (__printf__, 2, 3)))
168{
169    FUNC(0, 0, 1);
170    return ret;
171}
172
173/**
174 * Log a warning to the log, default stderr, include bthe error from
175 * the last failure and then exit.
176 *
177 * @param context A Kerberos 5 context
178 * @param eval the exit code to exit with
179 * @param code error code of the last error
180 * @param fmt message to print
181 * @param ap arguments
182 *
183 * @ingroup krb5_error
184 */
185
186KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
187krb5_verr(krb5_context context, int eval, krb5_error_code code,
188	  const char *fmt, va_list ap)
189     __attribute__ ((__noreturn__, __format__ (__printf__, 4, 0)))
190{
191    _warnerr(context, 1, code, 0, fmt, ap);
192    exit(eval);
193    UNREACHABLE(return 0);
194}
195
196/**
197 * Log a warning to the log, default stderr, include bthe error from
198 * the last failure and then exit.
199 *
200 * @param context A Kerberos 5 context
201 * @param eval the exit code to exit with
202 * @param code error code of the last error
203 * @param fmt message to print
204 *
205 * @ingroup krb5_error
206 */
207
208KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
209krb5_err(krb5_context context, int eval, krb5_error_code code,
210	 const char *fmt, ...)
211     __attribute__ ((__noreturn__, __format__ (__printf__, 4, 5)))
212{
213    FUNC_NORET(1, code, 0);
214    exit(eval);
215    UNREACHABLE(return 0);
216}
217
218/**
219 * Log a warning to the log, default stderr, and then exit.
220 *
221 * @param context A Kerberos 5 context
222 * @param eval the exit code to exit with
223 * @param fmt message to print
224 * @param ap arguments
225 *
226 * @ingroup krb5_error
227 */
228
229KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
230krb5_verrx(krb5_context context, int eval, const char *fmt, va_list ap)
231     __attribute__ ((__noreturn__, __format__ (__printf__, 3, 0)))
232{
233    _warnerr(context, 0, 0, 0, fmt, ap);
234    exit(eval);
235    UNREACHABLE(return 0);
236}
237
238/**
239 * Log a warning to the log, default stderr, and then exit.
240 *
241 * @param context A Kerberos 5 context
242 * @param eval the exit code to exit with
243 * @param fmt message to print
244 *
245 * @ingroup krb5_error
246 */
247
248KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
249krb5_errx(krb5_context context, int eval, const char *fmt, ...)
250     __attribute__ ((__noreturn__, __format__ (__printf__, 3, 4)))
251{
252    FUNC_NORET(0, 0, 0);
253    exit(eval);
254    UNREACHABLE(return 0);
255}
256
257/**
258 * Log a warning to the log, default stderr, include bthe error from
259 * the last failure and then abort.
260 *
261 * @param context A Kerberos 5 context
262 * @param code error code of the last error
263 * @param fmt message to print
264 * @param ap arguments
265 *
266 * @ingroup krb5_error
267 */
268
269KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
270krb5_vabort(krb5_context context, krb5_error_code code,
271	    const char *fmt, va_list ap)
272     __attribute__ ((__noreturn__, __format__ (__printf__, 3, 0)))
273{
274    _warnerr(context, 1, code, 0, fmt, ap);
275    abort();
276    UNREACHABLE(return 0);
277}
278
279/**
280 * Log a warning to the log, default stderr, include the error from
281 * the last failure and then abort.
282 *
283 * @param context A Kerberos 5 context
284 * @param code error code of the last error
285 * @param fmt message to print
286 * @param ... arguments for format string
287 *
288 * @ingroup krb5_error
289 */
290
291KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
292krb5_abort(krb5_context context, krb5_error_code code, const char *fmt, ...)
293     __attribute__ ((__noreturn__, __format__ (__printf__, 3, 4)))
294{
295    FUNC_NORET(1, code, 0);
296    abort();
297    UNREACHABLE(return 0);
298}
299
300KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
301krb5_vabortx(krb5_context context, const char *fmt, va_list ap)
302     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 0)))
303{
304    _warnerr(context, 0, 0, 0, fmt, ap);
305    abort();
306    UNREACHABLE(return 0);
307}
308
309/**
310 * Log a warning to the log, default stderr, and then abort.
311 *
312 * @param context A Kerberos 5 context
313 * @param fmt printf format string of message to print
314 * @param ... arguments for format string
315 *
316 * @ingroup krb5_error
317 */
318
319KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
320krb5_abortx(krb5_context context, const char *fmt, ...)
321     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 3)))
322{
323    FUNC_NORET(0, 0, 0);
324    abort();
325    UNREACHABLE(return 0);
326}
327
328/**
329 * Set the default logging facility.
330 *
331 * @param context A Kerberos 5 context
332 * @param fac Facility to use for logging.
333 *
334 * @ingroup krb5_error
335 */
336
337KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
338krb5_set_warn_dest(krb5_context context, krb5_log_facility *fac)
339{
340    context->warn_dest = fac;
341    return 0;
342}
343
344/**
345 * Get the default logging facility.
346 *
347 * @param context A Kerberos 5 context
348 *
349 * @ingroup krb5_error
350 */
351
352KRB5_LIB_FUNCTION krb5_log_facility * KRB5_LIB_CALL
353krb5_get_warn_dest(krb5_context context)
354{
355    return context->warn_dest;
356}
357