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/*
* Copyright (c) 2011 Collabora Ltd
* Copyright (c) 2012 Stef Walter
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * 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.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
*
* CONTRIBUTORS
* Stef Walter <stef@thewalter.net>
*/
#include "config.h"
/*
* Oh god. glibc is nasty. Changes behavior and definitions of POSIX
* functions to completely different signatures depending on defines
*/
#define _POSIX_C_SOURCE 200112L
#include "compat.h"
#define P11_DEBUG_FLAG P11_DEBUG_LIB
#include "debug.h"
#include "message.h"
#include <assert.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
static bool print_messages = true;
static char *
default_message_storage (void)
{
static char message[P11_MESSAGE_MAX] = { 0, };
return message;
}
/* Function pointer declared in message.h as extern */
char * (* p11_message_storage) (void) = default_message_storage;
void
p11_message_store (const char* msg,
size_t length)
{
char *buffer;
/*
* p11_message_storage() is called to get a storage location for
* the last message. It defaults to a globally allocated buffer
* but is overridden in library.c with a function that returns
* per thread buffers.
*
* The returned value is P11_MESSAGE_MAX bytes long
*/
buffer = p11_message_storage ();
if (length > P11_MESSAGE_MAX - 1)
length = P11_MESSAGE_MAX - 1;
if (buffer != NULL) {
memcpy (buffer, msg, length);
buffer[length] = 0;
}
}
void
p11_message_err (int errnum,
const char* msg,
...)
{
char buffer[P11_MESSAGE_MAX];
char strerr[P11_MESSAGE_MAX];
va_list va;
size_t length;
va_start (va, msg);
length = vsnprintf (buffer, P11_MESSAGE_MAX - 1, msg, va);
va_end (va);
/* Was it truncated? */
if (length > P11_MESSAGE_MAX - 1)
length = P11_MESSAGE_MAX - 1;
buffer[length] = 0;
strncpy (strerr, "Unknown error", sizeof (strerr));
strerror_r (errnum, strerr, sizeof (strerr));
strerr[P11_MESSAGE_MAX - 1] = 0;
p11_message ("%s: %s", buffer, strerr);
}
void
p11_message (const char* msg,
...)
{
char buffer[P11_MESSAGE_MAX];
va_list va;
size_t length;
va_start (va, msg);
length = vsnprintf (buffer, P11_MESSAGE_MAX - 1, msg, va);
va_end (va);
/* Was it truncated? */
if (length > P11_MESSAGE_MAX - 1)
length = P11_MESSAGE_MAX - 1;
buffer[length] = 0;
/* If printing is not disabled, just print out */
if (print_messages)
fprintf (stderr, "p11-kit: %s\n", buffer);
else
p11_debug_message (P11_DEBUG_LIB, "message: %s", buffer);
p11_message_store (buffer, length);
}
void
p11_message_quiet (void)
{
print_messages = false;
}
void
p11_message_loud (void)
{
print_messages = true;
}
const char *
p11_message_last (void)
{
char *buffer;
buffer = p11_message_storage ();
return buffer && buffer[0] ? buffer : NULL;
}
void
p11_message_clear (void)
{
char *buffer;
buffer = p11_message_storage ();
if (buffer != NULL)
buffer[0] = 0;
}
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