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/*
* kmod - log infrastructure
*
* Copyright (C) 2012-2013 ProFUSION embedded systems
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <libkmod.h>
#include "kmod.h"
static bool log_use_syslog;
static int log_priority = LOG_ERR;
static _always_inline_ const char *prio_to_str(int prio)
{
const char *prioname;
char buf[32];
switch (prio) {
case LOG_CRIT:
prioname = "FATAL";
break;
case LOG_ERR:
prioname = "ERROR";
break;
case LOG_WARNING:
prioname = "WARNING";
break;
case LOG_NOTICE:
prioname = "NOTICE";
break;
case LOG_INFO:
prioname = "INFO";
break;
case LOG_DEBUG:
prioname = "DEBUG";
break;
default:
snprintf(buf, sizeof(buf), "LOG-%03d", prio);
prioname = buf;
}
return prioname;
}
_printf_format_(6, 0)
static void log_kmod(void *data, int priority, const char *file, int line,
const char *fn, const char *format, va_list args)
{
const char *prioname = prio_to_str(priority);
char *str;
if (vasprintf(&str, format, args) < 0)
return;
if (log_use_syslog) {
#ifdef ENABLE_DEBUG
syslog(priority, "%s: %s:%d %s() %s", prioname, file, line,
fn, str);
#else
syslog(priority, "%s: %s", prioname, str);
#endif
} else {
#ifdef ENABLE_DEBUG
fprintf(stderr, "%s: %s: %s:%d %s() %s",
program_invocation_short_name, prioname, file, line,
fn, str);
#else
fprintf(stderr, "%s: %s: %s", program_invocation_short_name,
prioname, str);
#endif
}
free(str);
(void)data;
}
void log_open(bool use_syslog)
{
log_use_syslog = use_syslog;
if (log_use_syslog)
openlog(program_invocation_short_name, LOG_CONS, LOG_DAEMON);
}
void log_close(void)
{
if (log_use_syslog)
closelog();
}
void log_printf(int prio, const char *fmt, ...)
{
const char *prioname;
char *msg;
va_list args;
if (prio > log_priority)
return;
va_start(args, fmt);
if (vasprintf(&msg, fmt, args) < 0)
msg = NULL;
va_end(args);
if (msg == NULL)
return;
prioname = prio_to_str(prio);
if (log_use_syslog)
syslog(prio, "%s: %s", prioname, msg);
else
fprintf(stderr, "%s: %s: %s", program_invocation_short_name,
prioname, msg);
free(msg);
if (prio <= LOG_CRIT)
exit(EXIT_FAILURE);
}
void log_setup_kmod_log(struct kmod_ctx *ctx, int priority)
{
log_priority = priority;
kmod_set_log_priority(ctx, log_priority);
kmod_set_log_fn(ctx, log_kmod, NULL);
}
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