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 RCSID("$Id$");
  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
  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     char *err_str = NULL;
  51
  52     args[0] = args[1] = NULL;
  53     arg = args;
  54     if(fmt){
  55         strlcat(xfmt, "%s", sizeof(xfmt));
  56         if(do_errtext)
  57             strlcat(xfmt, ": ", sizeof(xfmt));
  58         vasprintf(&msg, fmt, ap);
  59         if(msg == NULL)
  60             return ENOMEM;
  61         *arg++ = msg;
  62     }
  63     if(context && do_errtext){
  64         const char *err_msg;
  65
  66         strlcat(xfmt, "%s", sizeof(xfmt));
  67
  68         err_str = krb5_get_error_string(context);
  69         if (err_str != NULL) {
  70             *arg++ = err_str;
  71         } else {
  72             err_msg = krb5_get_err_text(context, code);
  73             if (err_msg)
  74                 *arg++ = err_msg;
  75             else
  76                 *arg++ = "<unknown error>";
  77         }
  78     }
  79
  80     if(context && context->warn_dest)
  81         krb5_log(context, context->warn_dest, level, xfmt, args[0], args[1]);
  82     else
  83         warnx(xfmt, args[0], args[1]);
  84     free(msg);
  85     free(err_str);
  86     return 0;
  87 }
  88
  89 #define FUNC(ETEXT, CODE, LEVEL)                                        \
  90     krb5_error_code ret;                                                \
  91     va_list ap;                                                         \
  92     va_start(ap, fmt);                                                  \
  93     ret = _warnerr(context, ETEXT, CODE, LEVEL, fmt, ap);               \
  94     va_end(ap);
  95
  96 #undef __attribute__
  97 #define __attribute__(X)
  98
  99 krb5_error_code KRB5_LIB_FUNCTION
 100 krb5_vwarn(krb5_context context, krb5_error_code code,
 101            const char *fmt, va_list ap)
 102      __attribute__ ((format (printf, 3, 0)))
 103 {
 104     return _warnerr(context, 1, code, 1, fmt, ap);
 105 }
 106
 107
 108 krb5_error_code KRB5_LIB_FUNCTION
 109 krb5_warn(krb5_context context, krb5_error_code code, const char *fmt, ...)
 110      __attribute__ ((format (printf, 3, 4)))
 111 {
 112     FUNC(1, code, 1);
 113     return ret;
 114 }
 115
 116 krb5_error_code KRB5_LIB_FUNCTION
 117 krb5_vwarnx(krb5_context context, const char *fmt, va_list ap)
 118      __attribute__ ((format (printf, 2, 0)))
 119 {
 120     return _warnerr(context, 0, 0, 1, fmt, ap);
 121 }
 122
 123 krb5_error_code KRB5_LIB_FUNCTION
 124 krb5_warnx(krb5_context context, const char *fmt, ...)
 125      __attribute__ ((format (printf, 2, 3)))
 126 {
 127     FUNC(0, 0, 1);
 128     return ret;
 129 }
 130
 131 krb5_error_code KRB5_LIB_FUNCTION
 132 krb5_verr(krb5_context context, int eval, krb5_error_code code,
 133           const char *fmt, va_list ap)
 134      __attribute__ ((noreturn, format (printf, 4, 0)))
 135 {
 136     _warnerr(context, 1, code, 0, fmt, ap);
 137     exit(eval);
 138 }
 139
 140
 141 krb5_error_code KRB5_LIB_FUNCTION
 142 krb5_err(krb5_context context, int eval, krb5_error_code code,
 143          const char *fmt, ...)
 144      __attribute__ ((noreturn, format (printf, 4, 5)))
 145 {
 146     FUNC(1, code, 0);
 147     exit(eval);
 148 }
 149
 150 krb5_error_code KRB5_LIB_FUNCTION
 151 krb5_verrx(krb5_context context, int eval, const char *fmt, va_list ap)
 152      __attribute__ ((noreturn, format (printf, 3, 0)))
 153 {
 154     _warnerr(context, 0, 0, 0, fmt, ap);
 155     exit(eval);
 156 }
 157
 158 krb5_error_code KRB5_LIB_FUNCTION
 159 krb5_errx(krb5_context context, int eval, const char *fmt, ...)
 160      __attribute__ ((noreturn, format (printf, 3, 4)))
 161 {
 162     FUNC(0, 0, 0);
 163     exit(eval);
 164 }
 165
 166 krb5_error_code KRB5_LIB_FUNCTION
 167 krb5_vabort(krb5_context context, krb5_error_code code,
 168             const char *fmt, va_list ap)
 169      __attribute__ ((noreturn, format (printf, 3, 0)))
 170 {
 171     _warnerr(context, 1, code, 0, fmt, ap);
 172     abort();
 173 }
 174
 175
 176 krb5_error_code KRB5_LIB_FUNCTION
 177 krb5_abort(krb5_context context, krb5_error_code code, const char *fmt, ...)
 178      __attribute__ ((noreturn, format (printf, 3, 4)))
 179 {
 180     FUNC(1, code, 0);
 181     abort();
 182 }
 183
 184 krb5_error_code KRB5_LIB_FUNCTION
 185 krb5_vabortx(krb5_context context, const char *fmt, va_list ap)
 186      __attribute__ ((noreturn, format (printf, 2, 0)))
 187 {
 188     _warnerr(context, 0, 0, 0, fmt, ap);
 189     abort();
 190 }
 191
 192 krb5_error_code KRB5_LIB_FUNCTION
 193 krb5_abortx(krb5_context context, const char *fmt, ...)
 194      __attribute__ ((noreturn, format (printf, 2, 3)))
 195 {
 196     FUNC(0, 0, 0);
 197     abort();
 198 }
 199
 200 krb5_error_code KRB5_LIB_FUNCTION
 201 krb5_set_warn_dest(krb5_context context, krb5_log_facility *fac)
 202 {
 203     context->warn_dest = fac;
 204     return 0;
 205 }
 206
 207 krb5_log_facility * KRB5_LIB_FUNCTION
 208 krb5_get_warn_dest(krb5_context context)
 209 {
 210     return context->warn_dest;
 211 }