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/*
* BSD LICENSE
*
* Copyright(c) 2014-2023 Intel Corporation. All rights reserved.
*
* 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.
* * Neither the name of Intel Corporation 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 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.O
*
*/
/**
* @brief Library operations logger for info, warnings and errors.
*/
#include "log.h"
#include "types.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/**
* ---------------------------------------
* Local data types
* ---------------------------------------
*/
#define AP_BUFFER_SIZE 320
/**
* ---------------------------------------
* Local data structures
* ---------------------------------------
*/
static int m_opt = 0; /**< log options */
static int m_fd = -1; /**< log file descriptor */
static void *m_context_log = NULL; /**< log callback context */
/**
* log callback
*/
static void (*m_callback_log)(void *, const size_t, const char *);
static int log_init_successful = 0; /**< log init gatekeeper */
/**
* ---------------------------------------
* Local functions
* ---------------------------------------
*/
/**
* =======================================
* initialize and shutdown
* =======================================
*/
int
log_init(int fd_log,
void (*callback_log)(void *, const size_t, const char *),
void *context_log,
int verbosity)
{
/**
* Set log message verbosity
*/
switch (verbosity) {
case LOG_VER_SILENT:
m_opt = LOG_OPT_SILENT;
log_init_successful = 1;
return LOG_RETVAL_OK;
case LOG_VER_DEFAULT:
m_opt = LOG_OPT_DEFAULT;
break;
case LOG_VER_VERBOSE:
m_opt = LOG_OPT_VERBOSE;
break;
case LOG_VER_SUPER_VERBOSE:
m_opt = LOG_OPT_SUPER_VERBOSE;
break;
default:
m_opt = LOG_OPT_SUPER_VERBOSE;
break;
}
if (fd_log < 0 && callback_log == NULL) {
fprintf(stderr, "%s: no LOG destination selected\n", __func__);
return LOG_RETVAL_ERROR;
}
m_fd = fd_log;
m_callback_log = callback_log;
m_context_log = context_log;
log_init_successful = 1;
return LOG_RETVAL_OK;
}
int
log_fini(void)
{
if (m_opt == LOG_OPT_SILENT) {
log_init_successful = 0;
return LOG_RETVAL_OK;
}
m_opt = 0;
m_fd = -1;
m_callback_log = NULL;
m_context_log = NULL;
log_init_successful = 0;
return LOG_RETVAL_OK;
}
void
log_printf(int type, const char *str, ...)
{
va_list ap;
char ap_buffer[AP_BUFFER_SIZE];
int size;
/* If log_init has not been successful then
* log_printf should not work. */
ASSERT(log_init_successful == 1);
if (log_init_successful == 0)
return;
if (m_opt == LOG_OPT_SILENT)
return;
if ((m_opt & type) == 0)
return;
ASSERT(str != NULL);
if (str == NULL)
return;
va_start(ap, str);
ap_buffer[AP_BUFFER_SIZE - 1] = '\0';
size = vsnprintf(ap_buffer, AP_BUFFER_SIZE - 1, str, ap);
va_end(ap);
ASSERT(size >= 0);
if (size < 0)
return;
if (m_callback_log != NULL)
m_callback_log(m_context_log, size, ap_buffer);
if (m_fd >= 0) {
if (write(m_fd, ap_buffer, size) < 0)
fprintf(stderr, "%s: printing to file failed\n",
__func__);
}
}
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