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#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <aio.h>
#include <signal.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/uio.h>
#include "init.h"
#include "common.h"
#include "conf_file.h"
#include "log.h"
//static const char* level_name[]={" msg", "error", " warn", " info", " info", "debug"};
static int log_fd = -1;
static int conf_buf_size;
#define THREADED_LOG_FILE
#ifdef THREADED_LOG_FILE
static LIST_HEAD(log_queue);
static LIST_HEAD(log_buf);
static int buf_size;
static int buf_cnt;
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t cond;
static pthread_t thr;
static int need_reopen;
#endif
static void make_hdr(struct log_msg *msg)
{
struct tm tm;
tm = *localtime(&msg->timestamp.tv_sec);
msg->hdr->len = sprintf(msg->hdr->msg, "[%i-%02i-%02i %02i:%02i:%02i]: ", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec/*, (int)msg->timestamp.tv_usec/100000*/);
}
/*static void __log(struct log_msg *msg)
{
struct log_chunk *chunk;
struct iovec iov[IOV_MAX];
int iov_cnt;
struct list_head *pos = msg->chunks->next;
make_hdr(msg);
iov[0].iov_base = msg->hdr->msg;
iov[0].iov_len = msg->hdr->len;
iov_cnt = 1;
while (pos != msg->chunks) {
chunk = list_entry(pos, typeof(*chunk), entry);
iov[iov_cnt].iov_base = chunk->msg;
iov[iov_cnt].iov_len = chunk->len;
iov_cnt++;
pos = pos->next;
if (iov_cnt == IOV_MAX || pos == msg->chunks) {
writev(log_fd, iov, iov_cnt);
iov_cnt = 0;
}
}
log_free_msg(msg);
}*/
static void write_buf()
{
struct log_msg *msg;
struct log_chunk *chunk;
struct iovec iov[IOV_MAX];
int n = 0;
list_for_each_entry(msg, &log_buf, entry) {
iov[n].iov_base = msg->hdr->msg;
iov[n].iov_len = msg->hdr->len;
n++;
list_for_each_entry(chunk, msg->chunks, entry) {
iov[n].iov_base = chunk->msg;
iov[n].iov_len = chunk->len;
n++;
if (n >= IOV_MAX - 2) {
writev(log_fd, iov, n);
n = 0;
}
}
}
if (n)
writev(log_fd, iov, n);
while (!list_empty(&log_buf)) {
msg = list_entry(log_buf.next, typeof(*msg), entry);
list_del(&msg->entry);
log_free_msg(msg);
}
buf_size = 0;
buf_cnt = 0;
}
static void do_log(struct log_msg *msg)
{
#ifndef THREADED_LOG_FILE
struct log_chunk *chunk;
#endif
if (log_fd < 0 || msg->level == 5) {
log_free_msg(msg);
return;
}
make_hdr(msg);
#ifdef THREADED_LOG_FILE
pthread_mutex_lock(&lock);
list_add_tail(&msg->entry, &log_queue);
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
#else
buf_cnt++;
buf_size += msg->hdr->len;
list_for_each_entry(chunk, msg->chunks, entry) {
buf_size += chunk->len;
buf_cnt++;
}
if (buf_cnt > IOV_MAX - 16 || buf_size >= conf_buf_size)
write_buf();
#endif
}
static void __reopen(void)
{
const char *fname = conf_get_opt("log", "log-file");
if (log_fd >= 0) {
close(log_fd);
log_fd = -1;
}
if (!fname)
return;
log_fd = open(fname, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR);
if (log_fd < 0) {
log_emerg("log_file: open '%s': %s\n", fname, strerror(errno));
return;
}
fcntl(log_fd, F_SETFD, FD_CLOEXEC);
}
static void reopen(void)
{
#ifdef THREADED_LOG_FILE
pthread_mutex_lock(&lock);
need_reopen = 1;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
#else
__reopen();
#endif
}
#ifdef THREADED_LOG_FILE
static void *log_thread(void *ignored)
{
struct log_msg *msg;
struct log_chunk *chunk;
pthread_mutex_lock(&lock);
while (1) {
if (need_reopen) {
need_reopen = 0;
__reopen();
}
while (!list_empty(&log_queue)) {
msg = list_entry(log_queue.next, typeof(*msg), entry);
list_move_tail(&msg->entry, &log_buf);
buf_cnt++;
buf_size += msg->hdr->len;
list_for_each_entry(chunk, msg->chunks, entry) {
buf_size += chunk->len;
buf_cnt++;
}
if (buf_cnt > IOV_MAX - 16 || buf_size >= conf_buf_size) {
pthread_mutex_unlock(&lock);
write_buf();
pthread_mutex_lock(&lock);
}
}
pthread_cond_wait(&cond, &lock);
}
pthread_mutex_unlock(&lock);
return NULL;
}
#endif
static struct log_target target = {
.log = do_log,
.reopen = reopen,
};
static void load_config()
{
const char *opt = conf_get_opt("log", "buffer");
if (opt)
conf_buf_size = atoi(opt);
else
conf_buf_size = 0;
}
static void init(void)
{
if (!conf_get_opt("log", "log-file"))
return;
load_config();
log_register_target(&target);
reopen();
#ifdef THREADED_LOG_FILE
pthread_cond_init(&cond, NULL);
pthread_create(&thr, NULL, log_thread, NULL);
#endif
}
DEFINE_INIT(2, init);
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