lib/krb5/warn.c

   1 /*
   2  * Copyright (c) 1997 - 2001 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 #include "krb5_locl.h"
  35 #include <err.h>
  36
  37 static krb5_error_code _warnerr(krb5_context context, int do_errtext,
  38          krb5_error_code code, int level, const char *fmt, va_list ap)
  39         __attribute__((__format__(__printf__, 5, 0)));
  40
  41 static krb5_error_code
  42 _warnerr(krb5_context context, int do_errtext,
  43          krb5_error_code code, int level, const char *fmt, va_list ap)
  44 {
  45     char xfmt[7] = "";
  46     const char *args[2], **arg;
  47     char *msg = NULL;
  48     const char *err_str = NULL;
  49
  50     args[0] = args[1] = NULL;
  51     arg = args;
  52     if(fmt){
  53         strlcat(xfmt, "%s", sizeof(xfmt));
  54         if(do_errtext)
  55             strlcat(xfmt, ": ", sizeof(xfmt));
  56         vasprintf(&msg, fmt, ap);
  57         if(msg == NULL)
  58             return ENOMEM;
  59         *arg++ = msg;
  60     }
  61     if(context && do_errtext){
  62         const char *err_msg;
  63
  64         strlcat(xfmt, "%s", sizeof(xfmt));
  65
  66         err_str = krb5_get_error_message(context, code);
  67         if (err_str != NULL) {
  68             *arg = err_str;
  69         } else {
  70             err_msg = krb5_get_err_text(context, code);
  71             if (err_msg)
  72                 *arg = err_msg;
  73             else
  74                 *arg= "<unknown error>";
  75         }
  76     }
  77
  78     if(context && context->warn_dest)
  79         krb5_log(context, context->warn_dest, level, xfmt, args[0], args[1]);
  80     else
  81         warnx(xfmt, args[0], args[1]);
  82     free(msg);
  83     krb5_free_error_message(context, err_str);
  84     return 0;
  85 }
  86
  87 #define FUNC(ETEXT, CODE, LEVEL)                                        \
  88     krb5_error_code ret;                                                \
  89     va_list ap;                                                         \
  90     va_start(ap, fmt);                                                  \
  91     ret = _warnerr(context, ETEXT, CODE, LEVEL, fmt, ap);               \
  92     va_end(ap);
  93
  94 #undef __attribute__
  95 #define __attribute__(X)
  96
  97 /**
  98  * Log a warning to the log, default stderr, include the error from
  99  * the last failure.
 100  *
 101  * @param context A Kerberos 5 context.
 102  * @param code error code of the last error
 103  * @param fmt message to print
 104  * @param ap arguments
 105  *
 106  * @ingroup krb5_error
 107  */
 108
 109 krb5_error_code KRB5_LIB_FUNCTION
 110 krb5_vwarn(krb5_context context, krb5_error_code code,
 111            const char *fmt, va_list ap)
 112      __attribute__ ((format (printf, 3, 0)))
 113 {
 114     return _warnerr(context, 1, code, 1, fmt, ap);
 115 }
 116
 117 /**
 118  * Log a warning to the log, default stderr, include the error from
 119  * the last failure.
 120  *
 121  * @param context A Kerberos 5 context.
 122  * @param code error code of the last error
 123  * @param fmt message to print
 124  *
 125  * @ingroup krb5_error
 126  */
 127
 128 krb5_error_code KRB5_LIB_FUNCTION
 129 krb5_warn(krb5_context context, krb5_error_code code, const char *fmt, ...)
 130      __attribute__ ((format (printf, 3, 4)))
 131 {
 132     FUNC(1, code, 1);
 133     return ret;
 134 }
 135
 136 /**
 137  * Log a warning to the log, default stderr.
 138  *
 139  * @param context A Kerberos 5 context.
 140  * @param fmt message to print
 141  * @param ap arguments
 142  *
 143  * @ingroup krb5_error
 144  */
 145
 146 krb5_error_code KRB5_LIB_FUNCTION
 147 krb5_vwarnx(krb5_context context, const char *fmt, va_list ap)
 148      __attribute__ ((format (printf, 2, 0)))
 149 {
 150     return _warnerr(context, 0, 0, 1, fmt, ap);
 151 }
 152
 153 /**
 154  * Log a warning to the log, default stderr.
 155  *
 156  * @param context A Kerberos 5 context.
 157  * @param fmt message to print
 158  *
 159  * @ingroup krb5_error
 160  */
 161
 162 krb5_error_code KRB5_LIB_FUNCTION
 163 krb5_warnx(krb5_context context, const char *fmt, ...)
 164      __attribute__ ((format (printf, 2, 3)))
 165 {
 166     FUNC(0, 0, 1);
 167     return ret;
 168 }
 169
 170 /**
 171  * Log a warning to the log, default stderr, include bthe error from
 172  * the last failure and then exit.
 173  *
 174  * @param context A Kerberos 5 context
 175  * @param eval the exit code to exit with
 176  * @param code error code of the last error
 177  * @param fmt message to print
 178  * @param ap arguments
 179  *
 180  * @ingroup krb5_error
 181  */
 182
 183 krb5_error_code KRB5_LIB_FUNCTION
 184 krb5_verr(krb5_context context, int eval, krb5_error_code code,
 185           const char *fmt, va_list ap)
 186      __attribute__ ((noreturn, format (printf, 4, 0)))
 187 {
 188     _warnerr(context, 1, code, 0, fmt, ap);
 189     exit(eval);
 190 }
 191
 192 /**
 193  * Log a warning to the log, default stderr, include bthe error from
 194  * the last failure and then exit.
 195  *
 196  * @param context A Kerberos 5 context
 197  * @param eval the exit code to exit with
 198  * @param code error code of the last error
 199  * @param fmt message to print
 200  *
 201  * @ingroup krb5_error
 202  */
 203
 204 krb5_error_code KRB5_LIB_FUNCTION
 205 krb5_err(krb5_context context, int eval, krb5_error_code code,
 206          const char *fmt, ...)
 207      __attribute__ ((noreturn, format (printf, 4, 5)))
 208 {
 209     FUNC(1, code, 0);
 210     exit(eval);
 211 }
 212
 213 /**
 214  * Log a warning to the log, default stderr, and then exit.
 215  *
 216  * @param context A Kerberos 5 context
 217  * @param eval the exit code to exit with
 218  * @param fmt message to print
 219  * @param ap arguments
 220  *
 221  * @ingroup krb5_error
 222  */
 223
 224 krb5_error_code KRB5_LIB_FUNCTION
 225 krb5_verrx(krb5_context context, int eval, const char *fmt, va_list ap)
 226      __attribute__ ((noreturn, format (printf, 3, 0)))
 227 {
 228     _warnerr(context, 0, 0, 0, fmt, ap);
 229     exit(eval);
 230 }
 231
 232 /**
 233  * Log a warning to the log, default stderr, and then exit.
 234  *
 235  * @param context A Kerberos 5 context
 236  * @param eval the exit code to exit with
 237  * @param fmt message to print
 238  *
 239  * @ingroup krb5_error
 240  */
 241
 242 krb5_error_code KRB5_LIB_FUNCTION
 243 krb5_errx(krb5_context context, int eval, const char *fmt, ...)
 244      __attribute__ ((noreturn, format (printf, 3, 4)))
 245 {
 246     FUNC(0, 0, 0);
 247     exit(eval);
 248 }
 249
 250 /**
 251  * Log a warning to the log, default stderr, include bthe error from
 252  * the last failure and then abort.
 253  *
 254  * @param context A Kerberos 5 context
 255  * @param code error code of the last error
 256  * @param fmt message to print
 257  * @param ap arguments
 258  *
 259  * @ingroup krb5_error
 260  */
 261
 262 krb5_error_code KRB5_LIB_FUNCTION
 263 krb5_vabort(krb5_context context, krb5_error_code code,
 264             const char *fmt, va_list ap)
 265      __attribute__ ((noreturn, format (printf, 3, 0)))
 266 {
 267     _warnerr(context, 1, code, 0, fmt, ap);
 268     abort();
 269 }
 270
 271 /**
 272  * Log a warning to the log, default stderr, include bthe error from
 273  * the last failure and then abort.
 274  *
 275  * @param context A Kerberos 5 context
 276  * @param code error code of the last error
 277  * @param fmt message to print
 278  *
 279  * @ingroup krb5_error
 280  */
 281
 282 krb5_error_code KRB5_LIB_FUNCTION
 283 krb5_abort(krb5_context context, krb5_error_code code, const char *fmt, ...)
 284      __attribute__ ((noreturn, format (printf, 3, 4)))
 285 {
 286     FUNC(1, code, 0);
 287     abort();
 288 }
 289
 290 krb5_error_code KRB5_LIB_FUNCTION
 291 krb5_vabortx(krb5_context context, const char *fmt, va_list ap)
 292      __attribute__ ((noreturn, format (printf, 2, 0)))
 293 {
 294     _warnerr(context, 0, 0, 0, fmt, ap);
 295     abort();
 296 }
 297
 298 /**
 299  * Log a warning to the log, default stderr, and then abort.
 300  *
 301  * @param context A Kerberos 5 context
 302  * @param code error code of the last error
 303  * @param fmt message to print
 304  *
 305  * @ingroup krb5_error
 306  */
 307
 308 krb5_error_code KRB5_LIB_FUNCTION
 309 krb5_abortx(krb5_context context, const char *fmt, ...)
 310      __attribute__ ((noreturn, format (printf, 2, 3)))
 311 {
 312     FUNC(0, 0, 0);
 313     abort();
 314 }
 315
 316 /**
 317  * Set the default logging facility.
 318  *
 319  * @param context A Kerberos 5 context
 320  * @param fac Facility to use for logging.
 321  *
 322  * @ingroup krb5_error
 323  */
 324
 325 krb5_error_code KRB5_LIB_FUNCTION
 326 krb5_set_warn_dest(krb5_context context, krb5_log_facility *fac)
 327 {
 328     context->warn_dest = fac;
 329     return 0;
 330 }
 331
 332 /**
 333  * Get the default logging facility.
 334  *
 335  * @param context A Kerberos 5 context
 336  *
 337  * @ingroup krb5_error
 338  */
 339
 340 krb5_log_facility * KRB5_LIB_FUNCTION
 341 krb5_get_warn_dest(krb5_context context)
 342 {
 343     return context->warn_dest;
 344 }