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/*
* Copyright (c) 2006 - 2007 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 "hx_locl.h"
RCSID("$Id: error.c 22332 2007-12-17 01:03:22Z lha $");
/**
* @page page_error Hx509 error reporting functions
*
* See the library functions here: @ref hx509_error
*/
struct hx509_error_data {
hx509_error next;
int code;
char *msg;
};
static void
free_error_string(hx509_error msg)
{
while(msg) {
hx509_error m2 = msg->next;
free(msg->msg);
free(msg);
msg = m2;
}
}
/**
* Resets the error strings the hx509 context.
*
* @param context A hx509 context.
*
* @ingroup hx509_error
*/
void
hx509_clear_error_string(hx509_context context)
{
free_error_string(context->error);
context->error = NULL;
}
/**
* Add an error message to the hx509 context.
*
* @param context A hx509 context.
* @param flags
* - HX509_ERROR_APPEND appends the error string to the old messages
(code is updated).
* @param code error code related to error message
* @param fmt error message format
* @param ap arguments to error message format
*
* @ingroup hx509_error
*/
void
hx509_set_error_stringv(hx509_context context, int flags, int code,
const char *fmt, va_list ap)
{
hx509_error msg;
msg = calloc(1, sizeof(*msg));
if (msg == NULL) {
hx509_clear_error_string(context);
return;
}
if (vasprintf(&msg->msg, fmt, ap) == -1) {
hx509_clear_error_string(context);
free(msg);
return;
}
msg->code = code;
if (flags & HX509_ERROR_APPEND) {
msg->next = context->error;
context->error = msg;
} else {
free_error_string(context->error);
context->error = msg;
}
}
/**
* See hx509_set_error_stringv().
*
* @param context A hx509 context.
* @param flags
* - HX509_ERROR_APPEND appends the error string to the old messages
(code is updated).
* @param code error code related to error message
* @param fmt error message format
* @param ... arguments to error message format
*
* @ingroup hx509_error
*/
void
hx509_set_error_string(hx509_context context, int flags, int code,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
hx509_set_error_stringv(context, flags, code, fmt, ap);
va_end(ap);
}
/**
* Get an error string from context associated with error_code.
*
* @param context A hx509 context.
* @param error_code Get error message for this error code.
*
* @return error string, free with hx509_free_error_string().
*
* @ingroup hx509_error
*/
char *
hx509_get_error_string(hx509_context context, int error_code)
{
struct rk_strpool *p = NULL;
hx509_error msg = context->error;
if (msg == NULL || msg->code != error_code) {
const char *cstr;
char *str;
cstr = com_right(context->et_list, error_code);
if (cstr)
return strdup(cstr);
cstr = strerror(error_code);
if (cstr)
return strdup(cstr);
if (asprintf(&str, "<unknown error: %d>", error_code) == -1)
return NULL;
return str;
}
for (msg = context->error; msg; msg = msg->next)
p = rk_strpoolprintf(p, "%s%s", msg->msg,
msg->next != NULL ? "; " : "");
return rk_strpoolcollect(p);
}
/**
* Free error string returned by hx509_get_error_string().
*
* @param str error string to free.
*
* @ingroup hx509_error
*/
void
hx509_free_error_string(char *str)
{
free(str);
}
/**
* Print error message and fatally exit from error code
*
* @param context A hx509 context.
* @param exit_code exit() code from process.
* @param error_code Error code for the reason to exit.
* @param fmt format string with the exit message.
* @param ... argument to format string.
*
* @ingroup hx509_error
*/
void
hx509_err(hx509_context context, int exit_code,
int error_code, const char *fmt, ...)
{
va_list ap;
const char *msg;
char *str;
va_start(ap, fmt);
vasprintf(&str, fmt, ap);
va_end(ap);
msg = hx509_get_error_string(context, error_code);
if (msg == NULL)
msg = "no error";
errx(exit_code, "%s: %s", str, msg);
}
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