lib/base/warn.c

   1 /*
   2  * Copyright (c) 1997 - 2020 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 #if defined(_MSC_VER)
  35 # pragma warning(disable: 4646)
  36 # pragma warning(disable: 4716)
  37 #endif
  38
  39 #include "baselocl.h"
  40 #include <err.h>
  41
  42 static heim_error_code _warnerr(heim_context context, int do_errtext,
  43          heim_error_code code, int level, const char *fmt, va_list ap)
  44         __attribute__ ((__format__ (__printf__, 5, 0)));
  45
  46 static heim_error_code
  47 _warnerr(heim_context context, int do_errtext,
  48          heim_error_code code, int level, const char *fmt, va_list ap)
  49 {
  50     char xfmt[7] = "";
  51     const char *args[2], **arg;
  52     char *msg = NULL;
  53     const char *err_str = NULL;
  54     heim_error_code ret;
  55
  56     args[0] = args[1] = NULL;
  57     arg = args;
  58     if(fmt){
  59         strlcat(xfmt, "%s", sizeof(xfmt));
  60         if(do_errtext)
  61             strlcat(xfmt, ": ", sizeof(xfmt));
  62         ret = vasprintf(&msg, fmt, ap);
  63         if(ret < 0 || msg == NULL)
  64             return ENOMEM;
  65         *arg++ = msg;
  66     }
  67     if (context && do_errtext) {
  68         strlcat(xfmt, "%s", sizeof(xfmt));
  69
  70         err_str = heim_get_error_message(context, code);
  71         if (err_str != NULL) {
  72             *arg = err_str;
  73         } else {
  74             *arg= "<unknown error>";
  75         }
  76     }
  77
  78     if (context && heim_get_warn_dest(context))
  79         heim_log(context, heim_get_warn_dest(context), level, xfmt, args[0],
  80                  args[1]);
  81     else
  82         warnx(xfmt, args[0], args[1]);
  83     free(msg);
  84     heim_free_error_message(context, err_str);
  85     return 0;
  86 }
  87
  88 #define FUNC(ETEXT, CODE, LEVEL)                                        \
  89     heim_error_code ret;                                                \
  90     va_list ap;                                                         \
  91     va_start(ap, fmt);                                                  \
  92     ret = _warnerr(context, ETEXT, CODE, LEVEL, fmt, ap);               \
  93     va_end(ap);
  94
  95 #undef __attribute__
  96 #define __attribute__(X)
  97
  98 /**
  99  * Log a warning to the log, default stderr, include the error from
 100  * the last failure.
 101  *
 102  * @param context A Kerberos 5 context.
 103  * @param code error code of the last error
 104  * @param fmt message to print
 105  * @param ap arguments
 106  *
 107  * @ingroup heim_error
 108  */
 109
 110 heim_error_code
 111 heim_vwarn(heim_context context, heim_error_code code,
 112            const char *fmt, va_list ap)
 113      __attribute__ ((__format__ (__printf__, 3, 0)))
 114 {
 115     return _warnerr(context, 1, code, 1, fmt, ap);
 116 }
 117
 118 /**
 119  * Log a warning to the log, default stderr, include the error from
 120  * the last failure.
 121  *
 122  * @param context A Kerberos 5 context.
 123  * @param code error code of the last error
 124  * @param fmt message to print
 125  *
 126  * @ingroup heim_error
 127  */
 128
 129 heim_error_code
 130 heim_warn(heim_context context, heim_error_code code, const char *fmt, ...)
 131      __attribute__ ((__format__ (__printf__, 3, 4)))
 132 {
 133     FUNC(1, code, 1);
 134     return ret;
 135 }
 136
 137 /**
 138  * Log a warning to the log, default stderr.
 139  *
 140  * @param context A Kerberos 5 context.
 141  * @param fmt message to print
 142  * @param ap arguments
 143  *
 144  * @ingroup heim_error
 145  */
 146
 147 heim_error_code
 148 heim_vwarnx(heim_context context, const char *fmt, va_list ap)
 149      __attribute__ ((__format__ (__printf__, 2, 0)))
 150 {
 151     return _warnerr(context, 0, 0, 1, fmt, ap);
 152 }
 153
 154 /**
 155  * Log a warning to the log, default stderr.
 156  *
 157  * @param context A Kerberos 5 context.
 158  * @param fmt message to print
 159  *
 160  * @ingroup heim_error
 161  */
 162
 163 heim_error_code
 164 heim_warnx(heim_context context, const char *fmt, ...)
 165      __attribute__ ((__format__ (__printf__, 2, 3)))
 166 {
 167     FUNC(0, 0, 1);
 168     return ret;
 169 }