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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* 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 Hyra 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.
*/
#include <sys/syslog.h>
#include <sys/spinlock.h>
#include <dev/cons/cons.h>
#include <dev/timer.h>
#include <stdarg.h>
#include <string.h>
#if defined(__SERIAL_DEBUG)
#define SERIAL_DEBUG __SERIAL_DEBUG
#else
#define SERIAL_DEBUG 0
#endif
#if defined(__USER_KMSG)
#define USER_KMSG __USER_KMSG
#else
#define USER_KMSG 0
#endif
/* Global logger lock */
static struct spinlock lock = {0};
static bool no_cons_log = false;
static void
syslog_write(const char *s, size_t len)
{
const char *p;
size_t l;
if (SERIAL_DEBUG) {
p = s;
l = len;
while (l--) {
serial_putc(*p);
++p;
}
}
/*
* If the USER_KMSG option is disabled in kconf,
* do not log to the console if everything else
* has already started.
*/
if (!USER_KMSG && no_cons_log) {
return;
}
cons_putstr(&g_root_scr, s, len);
}
/*
* XXX: Not serialized
*/
void
vkprintf(const char *fmt, va_list *ap)
{
char buffer[1024] = {0};
vsnprintf(buffer, sizeof(buffer), fmt, *ap);
syslog_write(buffer, strlen(buffer));
}
void
kprintf(const char *fmt, ...)
{
va_list ap;
char timestamp[64] = "[ 0.000000] ";
const char *fmt_p = fmt;
bool use_timestamp = true;
bool has_counter = true;
struct timer tmr;
/*
* If the first char is OMIT_TIMESTAMP, then we won't
* print out the timestamp.
*/
if (*fmt == OMIT_TIMESTAMP[0]) {
++fmt_p;
use_timestamp = false;
}
/* See if we have a timer */
if (req_timer(TIMER_GP, &tmr) != TMRR_SUCCESS) {
has_counter = false;
}
/* If we can use the counter, format the timestamp */
if (has_counter) {
if (tmr.get_time_sec != NULL && tmr.get_time_usec != NULL) {
snprintf(timestamp, sizeof(timestamp), "[ %d.%06d] ",
tmr.get_time_sec(), tmr.get_time_usec());
}
}
spinlock_acquire(&lock);
if (use_timestamp) {
syslog_write(timestamp, strlen(timestamp));
}
va_start(ap, fmt);
vkprintf(fmt_p, &ap);
va_end(ap);
spinlock_release(&lock);
}
/*
* Silence kernel messages in if the system
* is already operating in a user context.
*
* XXX: This is ignored if the kconf USER_KMSG
* option is set to "no"
*/
void
syslog_silence(bool option)
{
no_cons_log = option;
}
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