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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "triton.h"
#include "spinlock.h"
#include "log.h"
#include "list.h"
#include "events.h"
#include "ppp.h"
#include "memdebug.h"
static int conf_queue_max = 1000;
static void syslog_close(struct triton_context_t *ctx);
static struct triton_context_t syslog_ctx = {
.close = syslog_close,
.before_switch = log_switch,
};
static LIST_HEAD(msg_queue);
static int queue_size;
static int sleeping = 1;
static spinlock_t queue_lock = SPINLOCK_INITIALIZER;
static char *log_buf;
static int need_close;
static char *ident;
static int prio_map[] = {LOG_INFO, LOG_ERR, LOG_WARNING, LOG_INFO, LOG_INFO, LOG_DEBUG};
static void unpack_msg(struct log_msg_t *msg)
{
struct log_chunk_t *chunk;
int pos;
strcpy(log_buf, msg->hdr->msg);
pos = strlen(log_buf);
list_for_each_entry(chunk, msg->chunks, entry) {
memcpy(log_buf + pos, chunk->msg, chunk->len);
pos += chunk->len;
}
if (pos > 1)
log_buf[pos - 1] = 0;
else
log_buf[0] = 0;
}
static void set_hdr(struct log_msg_t *msg, struct ppp_t *ppp)
{
if (ppp) {
if (snprintf(msg->hdr->msg, LOG_CHUNK_SIZE, "%s:%s: ", ppp->ifname, ppp->username ? ppp->username : ""))
strcpy(msg->hdr->msg + LOG_CHUNK_SIZE - 3, ": ");
} else
msg->hdr->msg[0] = 0;
}
static void do_syslog(void)
{
struct log_msg_t *msg;
while (1) {
spin_lock(&queue_lock);
if (list_empty(&msg_queue)) {
sleeping = 1;
spin_unlock(&queue_lock);
if (need_close)
triton_context_unregister(&syslog_ctx);
return;
}
msg = list_entry(msg_queue.next, typeof(*msg), entry);
list_del(&msg->entry);
--queue_size;
spin_unlock(&queue_lock);
unpack_msg(msg);
syslog(prio_map[msg->level], "%s", log_buf);
log_free_msg(msg);
}
}
static void queue_log(struct log_msg_t *msg)
{
int r = 0, f = 0;
spin_lock(&queue_lock);
if (queue_size < conf_queue_max) {
list_add_tail(&msg->entry, &msg_queue);
++queue_size;
r = sleeping;
sleeping = 0;
} else
f = 1;
spin_unlock(&queue_lock);
if (r)
triton_context_call(&syslog_ctx, (void (*)(void*))do_syslog, NULL);
else if (f)
log_free_msg(msg);
}
static void general_log(struct log_target_t *t, struct log_msg_t *msg, struct ppp_t *ppp)
{
set_hdr(msg, ppp);
if (syslog_ctx.tpd)
queue_log(msg);
else {
unpack_msg(msg);
syslog(prio_map[msg->level], "%s", log_buf);
log_free_msg(msg);
}
}
static void syslog_close(struct triton_context_t *ctx)
{
spin_lock(&queue_lock);
if (sleeping) {
triton_context_unregister(&syslog_ctx);
} else
need_close = 1;
spin_unlock(&queue_lock);
}
static struct log_target_t target = {
.log = general_log,
};
static void parse_opt(const char *opt, char **ident, int *facility)
{
char *str = _strdup(opt);
char *ptr, *endptr;
int n;
const char *facility_name[] = {"daemon", "local0", "local1", "local2", "local3", "local4", "local5", "local6", "local7"};
const int facility_num[] = {LOG_DAEMON, LOG_LOCAL0, LOG_LOCAL1, LOG_LOCAL2, LOG_LOCAL3, LOG_LOCAL4, LOG_LOCAL5, LOG_LOCAL6, LOG_LOCAL7};
ptr = strchr(str, ',');
if (ptr) {
*ptr = 0;
n = strtol(ptr + 1, &endptr, 10);
if (*endptr) {
for (n = 0; n < sizeof(facility_name); n++) {
if (!strcasecmp(ptr + 1, facility_name[n]))
break;
}
if (n == sizeof(facility_name))
log_emerg("log_syslog: unknown facility name '%s'\n", ptr + 1);
else
*facility = facility_num[n];
} else
*facility = n;
}
*ident = str;
}
static void load_config()
{
const char *opt;
int facility = LOG_DAEMON;
if (ident) {
closelog();
_free(ident);
}
opt = conf_get_opt("log", "syslog");
if (opt)
parse_opt(opt, &ident, &facility);
else
ident = _strdup("accel-pppd");
openlog(ident, 0, facility);
}
static void init(void)
{
log_buf = malloc(LOG_MAX_SIZE + 1);
load_config();
triton_context_register(&syslog_ctx, NULL);
triton_context_wakeup(&syslog_ctx);
log_register_target(&target);
triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
}
DEFINE_INIT(1, init);
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