crypto/dist/heimdal/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("$Heimdal: warn.c 19086 2006-11-21 08:06:40Z lha $"
  38         "$NetBSD$");
  39
  40 static krb5_error_code _warnerr(krb5_context context, int do_errtext,
  41          krb5_error_code code, int level, const char *fmt, va_list ap)
  42         __attribute__((__format__(__printf__, 5, 0)));
  43
  44 static krb5_error_code
  45 _warnerr(krb5_context context, int do_errtext,
  46          krb5_error_code code, int level, const char *fmt, va_list ap)
  47 {
  48     char xfmt[7] = "";
  49     const char *args[2], **arg;
  50     char *msg = NULL;
  51     char *err_str = NULL;
  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         vasprintf(&msg, fmt, ap);
  60         if(msg == NULL)
  61             return ENOMEM;
  62         *arg++ = msg;
  63     }
  64     if(context && do_errtext){
  65         const char *err_msg;
  66
  67         strlcat(xfmt, "%s", sizeof(xfmt));
  68
  69         err_str = krb5_get_error_string(context);
  70         if (err_str != NULL) {
  71             *arg++ = err_str;
  72         } else {
  73             err_msg = krb5_get_err_text(context, code);
  74             if (err_msg)
  75                 *arg++ = err_msg;
  76             else
  77                 *arg++ = "<unknown error>";
  78         }
  79     }
  80
  81     if(context && context->warn_dest)
  82         krb5_log(context, context->warn_dest, level, xfmt, args[0], args[1]);
  83     else
  84         warnx(xfmt, args[0], args[1]);
  85     free(msg);
  86     free(err_str);
  87     return 0;
  88 }
  89
  90 #define FUNC(ETEXT, CODE, LEVEL)                                        \
  91     krb5_error_code ret;                                                \
  92     va_list ap;                                                         \
  93     va_start(ap, fmt);                                                  \
  94     ret = _warnerr(context, ETEXT, CODE, LEVEL, fmt, ap);               \
  95     va_end(ap);
  96
  97 #undef __attribute__
  98 #define __attribute__(X)
  99
 100 krb5_error_code KRB5_LIB_FUNCTION
 101 krb5_vwarn(krb5_context context, krb5_error_code code,
 102            const char *fmt, va_list ap)
 103      __attribute__ ((format (printf, 3, 0)))
 104 {
 105     return _warnerr(context, 1, code, 1, fmt, ap);
 106 }
 107
 108
 109 krb5_error_code KRB5_LIB_FUNCTION
 110 krb5_warn(krb5_context context, krb5_error_code code, const char *fmt, ...)
 111      __attribute__ ((format (printf, 3, 4)))
 112 {
 113     FUNC(1, code, 1);
 114     return ret;
 115 }
 116
 117 krb5_error_code KRB5_LIB_FUNCTION
 118 krb5_vwarnx(krb5_context context, const char *fmt, va_list ap)
 119      __attribute__ ((format (printf, 2, 0)))
 120 {
 121     return _warnerr(context, 0, 0, 1, fmt, ap);
 122 }
 123
 124 krb5_error_code KRB5_LIB_FUNCTION
 125 krb5_warnx(krb5_context context, const char *fmt, ...)
 126      __attribute__ ((format (printf, 2, 3)))
 127 {
 128     FUNC(0, 0, 1);
 129     return ret;
 130 }
 131
 132 krb5_error_code KRB5_LIB_FUNCTION
 133 krb5_verr(krb5_context context, int eval, krb5_error_code code,
 134           const char *fmt, va_list ap)
 135      __attribute__ ((noreturn, format (printf, 4, 0)))
 136 {
 137     _warnerr(context, 1, code, 0, fmt, ap);
 138     exit(eval);
 139 }
 140
 141
 142 krb5_error_code KRB5_LIB_FUNCTION
 143 krb5_err(krb5_context context, int eval, krb5_error_code code,
 144          const char *fmt, ...)
 145      __attribute__ ((noreturn, format (printf, 4, 5)))
 146 {
 147     FUNC(1, code, 0);
 148     exit(eval);
 149 }
 150
 151 krb5_error_code KRB5_LIB_FUNCTION
 152 krb5_verrx(krb5_context context, int eval, const char *fmt, va_list ap)
 153      __attribute__ ((noreturn, format (printf, 3, 0)))
 154 {
 155     _warnerr(context, 0, 0, 0, fmt, ap);
 156     exit(eval);
 157 }
 158
 159 krb5_error_code KRB5_LIB_FUNCTION
 160 krb5_errx(krb5_context context, int eval, const char *fmt, ...)
 161      __attribute__ ((noreturn, format (printf, 3, 4)))
 162 {
 163     FUNC(0, 0, 0);
 164     exit(eval);
 165 }
 166
 167 krb5_error_code KRB5_LIB_FUNCTION
 168 krb5_vabort(krb5_context context, krb5_error_code code,
 169             const char *fmt, va_list ap)
 170      __attribute__ ((noreturn, format (printf, 3, 0)))
 171 {
 172     _warnerr(context, 1, code, 0, fmt, ap);
 173     abort();
 174 }
 175
 176
 177 krb5_error_code KRB5_LIB_FUNCTION
 178 krb5_abort(krb5_context context, krb5_error_code code, const char *fmt, ...)
 179      __attribute__ ((noreturn, format (printf, 3, 4)))
 180 {
 181     FUNC(1, code, 0);
 182     abort();
 183 }
 184
 185 krb5_error_code KRB5_LIB_FUNCTION
 186 krb5_vabortx(krb5_context context, const char *fmt, va_list ap)
 187      __attribute__ ((noreturn, format (printf, 2, 0)))
 188 {
 189     _warnerr(context, 0, 0, 0, fmt, ap);
 190     abort();
 191 }
 192
 193 krb5_error_code KRB5_LIB_FUNCTION
 194 krb5_abortx(krb5_context context, const char *fmt, ...)
 195      __attribute__ ((noreturn, format (printf, 2, 3)))
 196 {
 197     FUNC(0, 0, 0);
 198     abort();
 199 }
 200
 201 krb5_error_code KRB5_LIB_FUNCTION
 202 krb5_set_warn_dest(krb5_context context, krb5_log_facility *fac)
 203 {
 204     context->warn_dest = fac;
 205     return 0;
 206 }
 207
 208 krb5_log_facility * KRB5_LIB_FUNCTION
 209 krb5_get_warn_dest(krb5_context context)
 210 {
 211     return context->warn_dest;
 212 }