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/*
* Copyright (c) 2001, 2003, 2005 - 2006 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5_locl.h"
RCSID("$Id: error_string.c 22142 2007-12-04 16:56:02Z lha $");
#undef __attribute__
#define __attribute__(X)
void KRB5_LIB_FUNCTION
krb5_free_error_string(krb5_context context, char *str)
{
HEIMDAL_MUTEX_lock(context->mutex);
if (str != context->error_buf)
free(str);
HEIMDAL_MUTEX_unlock(context->mutex);
}
void KRB5_LIB_FUNCTION
krb5_clear_error_string(krb5_context context)
{
HEIMDAL_MUTEX_lock(context->mutex);
if (context->error_string != NULL
&& context->error_string != context->error_buf)
free(context->error_string);
context->error_string = NULL;
HEIMDAL_MUTEX_unlock(context->mutex);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_set_error_string(krb5_context context, const char *fmt, ...)
__attribute__((format (printf, 2, 3)))
{
krb5_error_code ret;
va_list ap;
va_start(ap, fmt);
ret = krb5_vset_error_string (context, fmt, ap);
va_end(ap);
return ret;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_vset_error_string(krb5_context context, const char *fmt, va_list args)
__attribute__ ((format (printf, 2, 0)))
{
krb5_clear_error_string(context);
HEIMDAL_MUTEX_lock(context->mutex);
vasprintf(&context->error_string, fmt, args);
if(context->error_string == NULL) {
vsnprintf (context->error_buf, sizeof(context->error_buf), fmt, args);
context->error_string = context->error_buf;
}
HEIMDAL_MUTEX_unlock(context->mutex);
return 0;
}
/**
* Return the error message in context. On error or no error string,
* the function returns NULL.
*
* @param context Kerberos 5 context
*
* @return an error string, needs to be freed with
* krb5_free_error_string(). The functions return NULL on error.
*
* @ingroup krb5_error
*/
char * KRB5_LIB_FUNCTION
krb5_get_error_string(krb5_context context)
{
char *ret = NULL;
HEIMDAL_MUTEX_lock(context->mutex);
if (context->error_string)
ret = strdup(context->error_string);
HEIMDAL_MUTEX_unlock(context->mutex);
return ret;
}
krb5_boolean KRB5_LIB_FUNCTION
krb5_have_error_string(krb5_context context)
{
char *str;
HEIMDAL_MUTEX_lock(context->mutex);
str = context->error_string;
HEIMDAL_MUTEX_unlock(context->mutex);
return str != NULL;
}
/**
* Return the error message for `code' in context. On error the
* function returns NULL.
*
* @param context Kerberos 5 context
* @param code Error code related to the error
*
* @return an error string, needs to be freed with
* krb5_free_error_string(). The functions return NULL on error.
*
* @ingroup krb5_error
*/
char * KRB5_LIB_FUNCTION
krb5_get_error_message(krb5_context context, krb5_error_code code)
{
const char *cstr;
char *str;
str = krb5_get_error_string(context);
if (str)
return str;
cstr = krb5_get_err_text(context, code);
if (cstr)
return strdup(cstr);
if (asprintf(&str, "<unknown error: %d>", code) == -1)
return NULL;
return str;
}
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