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/*
* Copyright (C) 2008-2012, Parallels, Inc. All rights reserved.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#include <stdio.h>
#include <time.h>
#include <sys/time.h>
#include "ploop.h"
static int _s_log_enable = 1;
static int _s_log_level = 3;
static int _s_log_verbose_level = PLOOP_LOG_NOCONSOLE; // disable stdout/stderr
static FILE *_s_log_file = NULL;
static struct timeval start = { };
/* Thread Local Storage */
static __thread char _g_log_buf[LOG_BUF_SIZE];
static char *get_buffer(void)
{
return _g_log_buf;
}
#ifdef PLOOP_LOG_FILE
static FILE *_s_ploop_log_file = NULL;
__attribute__((constructor)) void __ploop_init (void)
{
_s_ploop_log_file = fopen(PLOOP_LOG_FILE, "a");
}
__attribute__((destructor)) void __ploop_deinit (void)
{
if (_s_ploop_log_file)
fclose(_s_ploop_log_file);
}
#endif
static inline void get_date(char *buf, int len)
{
struct tm *p_tm_time;
time_t ptime;
ptime = time(NULL);
p_tm_time = localtime(&ptime);
strftime(buf, len, "%Y-%m-%dT%T%z", p_tm_time);
}
static void timediff(struct timeval *from, struct timeval *to)
{
to->tv_sec -= from->tv_sec;
if (to->tv_usec >= from->tv_usec)
to->tv_usec -= from->tv_usec;
else {
to->tv_sec--;
to->tv_usec += 1000000 - from->tv_usec;
}
}
const static char* get_ts(void)
{
static char buf[16];
const static char empty[] = "";
struct timeval t;
if (_s_log_verbose_level < PLOOP_LOG_TIMESTAMPS)
return empty;
gettimeofday(&t, NULL);
timediff(&start, &t);
snprintf(buf, sizeof(buf), "[%2u.%06u] ",
(unsigned)t.tv_sec, (unsigned)t.tv_usec);
return buf;
}
static void logger_ap(int level, int err_no, const char *format, va_list ap)
{
char buf[LOG_BUF_SIZE];
char date[64];
char *err_buf;
int r;
int errno_tmp = errno;
FILE *std = (level < 0 ? stderr : stdout);
r = vsnprintf(buf, sizeof(buf), format, ap);
if ((r < sizeof(buf) - 1) && err_no) {
snprintf(buf + r, sizeof(buf) - r, ": %s",
strerror(err_no));
}
#ifdef PLOOP_LOG_FILE
if (_s_ploop_log_file && _s_log_level >= level) {
get_date(date, sizeof(date));
fprintf(_s_ploop_log_file, "%s pid=%d: %s\n", date, getpid(), buf);
fflush(_s_ploop_log_file);
}
#endif
if (_s_log_enable) {
if (_s_log_verbose_level != PLOOP_LOG_NOCONSOLE &&
_s_log_verbose_level >= level) {
fprintf(std, "%s%s\n", get_ts(), buf);
fflush(std);
}
if (_s_log_level >= level && _s_log_file != NULL) {
get_date(date, sizeof(date));
fprintf(_s_log_file, "%s : %s\n", date, buf);
fflush(_s_log_file);
}
}
if (level < 0 && (err_buf = get_buffer()) != NULL)
strcpy(err_buf, buf); /* Preserve error */
errno = errno_tmp;
}
void ploop_log(int level, const char *format, ...)
{
va_list ap;
va_start(ap, format);
logger_ap(level, 0, format, ap);
va_end(ap);
}
void __ploop_err(int err_no, const char *format, ...)
{
va_list ap;
int err = errno;
va_start(ap, format);
logger_ap(-1, err_no, format, ap);
va_end(ap);
errno = err;
}
const char *ploop_get_last_error(void)
{
return get_buffer();
}
void time_init(void) {
if (start.tv_sec == 0 && start.tv_usec == 0)
gettimeofday(&start, NULL);
}
void ploop_set_log_level(int level)
{
time_init();
_s_log_level = level;
}
int ploop_get_log_level(void)
{
return _s_log_level;
}
void ploop_set_verbose_level(int level)
{
time_init();
_s_log_verbose_level = level;
}
int ploop_set_log_file(const char *fname)
{
FILE *fp = NULL;
time_init();
if (fname != NULL) {
fp = fopen(fname, "a");
if (fp == NULL) {
__ploop_err(errno, "Can't open %s", fname);
return -1;
}
}
if (_s_log_file != NULL)
fclose(_s_log_file);
_s_log_file = fp;
return 0;
}
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