1 /* $NetBSD: warn.c,v 1.3 2019/12/15 22:50:50 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2001 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 #include "krb5_locl.h"
37 #include <err.h>
38
39 static 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
43 static krb5_error_code
_warnerr(krb5_context context,int do_errtext,krb5_error_code code,int level,const char * fmt,va_list ap)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
112 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_vwarn(krb5_context context,krb5_error_code code,const char * fmt,va_list ap)113 krb5_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
131 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_warn(krb5_context context,krb5_error_code code,const char * fmt,...)132 krb5_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
149 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_vwarnx(krb5_context context,const char * fmt,va_list ap)150 krb5_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
165 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_warnx(krb5_context context,const char * fmt,...)166 krb5_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
186 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_verr(krb5_context context,int eval,krb5_error_code code,const char * fmt,va_list ap)187 krb5_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
208 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_err(krb5_context context,int eval,krb5_error_code code,const char * fmt,...)209 krb5_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
229 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_verrx(krb5_context context,int eval,const char * fmt,va_list ap)230 krb5_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
248 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_errx(krb5_context context,int eval,const char * fmt,...)249 krb5_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
269 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_vabort(krb5_context context,krb5_error_code code,const char * fmt,va_list ap)270 krb5_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
291 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_abort(krb5_context context,krb5_error_code code,const char * fmt,...)292 krb5_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
300 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_vabortx(krb5_context context,const char * fmt,va_list ap)301 krb5_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
319 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_abortx(krb5_context context,const char * fmt,...)320 krb5_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
337 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_warn_dest(krb5_context context,krb5_log_facility * fac)338 krb5_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
352 KRB5_LIB_FUNCTION krb5_log_facility * KRB5_LIB_CALL
krb5_get_warn_dest(krb5_context context)353 krb5_get_warn_dest(krb5_context context)
354 {
355 return context->warn_dest;
356 }
357