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event-log.c
278 lines (240 loc) · 7.06 KB
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event-log.c
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/* Copyright (c) 2017-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "str.h"
#include "event-filter.h"
#include "lib-event-private.h"
static struct event_filter *global_debug_log_filter = NULL;
static struct event_filter *global_debug_send_filter = NULL;
static struct event_filter *global_core_log_filter = NULL;
#undef e_error
void e_error(struct event *event,
const char *source_filename, unsigned int source_linenum,
const char *fmt, ...)
{
struct event_log_params params = {
.log_type = LOG_TYPE_ERROR,
.source_filename = source_filename,
.source_linenum = source_linenum,
};
va_list args;
va_start(args, fmt);
event_logv(event, ¶ms, fmt, args);
va_end(args);
}
#undef e_warning
void e_warning(struct event *event,
const char *source_filename, unsigned int source_linenum,
const char *fmt, ...)
{
struct event_log_params params = {
.log_type = LOG_TYPE_WARNING,
.source_filename = source_filename,
.source_linenum = source_linenum,
};
va_list args;
va_start(args, fmt);
event_logv(event, ¶ms, fmt, args);
va_end(args);
}
#undef e_info
void e_info(struct event *event,
const char *source_filename, unsigned int source_linenum,
const char *fmt, ...)
{
struct event_log_params params = {
.log_type = LOG_TYPE_INFO,
.source_filename = source_filename,
.source_linenum = source_linenum,
};
va_list args;
va_start(args, fmt);
event_logv(event, ¶ms, fmt, args);
va_end(args);
}
#undef e_debug
void e_debug(struct event *event,
const char *source_filename, unsigned int source_linenum,
const char *fmt, ...)
{
struct event_log_params params = {
.log_type = LOG_TYPE_DEBUG,
.source_filename = source_filename,
.source_linenum = source_linenum,
};
va_list args;
va_start(args, fmt);
event_logv(event, ¶ms, fmt, args);
va_end(args);
}
static bool event_get_log_prefix(struct event *event, string_t *log_prefix,
bool *replace_prefix, unsigned int *type_pos)
{
bool ret = FALSE;
if (event->log_prefix_replace) {
/* this event replaces all parent log prefixes */
*replace_prefix = TRUE;
*type_pos = event->log_prefix == NULL ? 0 :
strlen(event->log_prefix);
} else if (event->parent == NULL) {
/* append to default log prefix, don't replace it */
} else {
if (event_get_log_prefix(event->parent, log_prefix,
replace_prefix, type_pos))
ret = TRUE;
}
if (event->log_prefix != NULL) {
str_append(log_prefix, event->log_prefix);
ret = TRUE;
}
return ret;
}
void event_log(struct event *event, const struct event_log_params *params,
const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
event_logv(event, params, fmt, args);
va_end(args);
}
#undef event_want_debug_log
bool event_want_debug_log(struct event *event, const char *source_filename,
unsigned int source_linenum)
{
struct failure_context ctx = { .type = LOG_TYPE_DEBUG };
if (event->forced_debug)
event->sending_debug_log = TRUE;
else if (global_debug_log_filter != NULL &&
event_filter_match_source(global_debug_log_filter, event,
source_filename, source_linenum, &ctx))
event->sending_debug_log = TRUE;
else if (global_core_log_filter != NULL &&
event_filter_match_source(global_core_log_filter, event,
source_filename, source_linenum, &ctx))
event->sending_debug_log = TRUE;
else
event->sending_debug_log = FALSE;
return event->sending_debug_log;
}
#undef event_want_debug
bool event_want_debug(struct event *event, const char *source_filename,
unsigned int source_linenum)
{
(void)event_want_debug_log(event, source_filename, source_linenum);
if (event->sending_debug_log)
return TRUE;
/* see if debug send filtering matches */
if (global_debug_send_filter != NULL) {
struct failure_context ctx = { .type = LOG_TYPE_DEBUG };
if (event_filter_match_source(global_debug_send_filter, event,
source_filename, source_linenum,
&ctx))
return TRUE;
}
return FALSE;
}
static void ATTR_FORMAT(3, 0)
event_logv_type(struct event *event, enum log_type log_type,
const char *fmt, va_list args)
{
string_t *log_prefix_str = t_str_new(64);
bool replace_prefix = FALSE;
unsigned int type_pos = 0;
struct failure_context ctx = {
.type = log_type,
};
bool abort_after_event = FALSE;
int old_errno = errno;
if (global_core_log_filter != NULL &&
event_filter_match_source(global_core_log_filter, event,
event->source_filename,
event->source_linenum, &ctx))
abort_after_event = TRUE;
if (!event_get_log_prefix(event, log_prefix_str,
&replace_prefix, &type_pos)) {
/* keep log prefix as it is */
event_vsend(event, &ctx, fmt, args);
} else if (replace_prefix) {
/* event overrides the log prefix (even if it's "") */
ctx.log_prefix = str_c(log_prefix_str);
ctx.log_prefix_type_pos = type_pos;
event_vsend(event, &ctx, fmt, args);
} else {
/* append to log prefix, but don't fully replace it */
str_vprintfa(log_prefix_str, fmt, args);
event_send(event, &ctx, "%s", str_c(log_prefix_str));
}
if (abort_after_event)
abort();
errno = old_errno;
}
void event_logv(struct event *event, const struct event_log_params *params,
const char *fmt, va_list args)
{
const char *orig_source_filename = event->source_filename;
unsigned int orig_source_linenum = event->source_linenum;
if (params->source_filename != NULL) {
event_set_source(event, params->source_filename,
params->source_linenum, TRUE);
}
event_ref(event);
event_logv_type(event, params->log_type, fmt, args);
event_set_source(event, orig_source_filename,
orig_source_linenum, TRUE);
event_unref(&event);
}
struct event *event_set_forced_debug(struct event *event, bool force)
{
if (force)
event->forced_debug = TRUE;
return event;
}
struct event *event_unset_forced_debug(struct event *event)
{
event->forced_debug = FALSE;
return event;
}
void event_set_global_debug_log_filter(struct event_filter *filter)
{
event_unset_global_debug_log_filter();
global_debug_log_filter = filter;
event_filter_ref(global_debug_log_filter);
}
struct event_filter *event_get_global_debug_log_filter(void)
{
return global_debug_log_filter;
}
void event_unset_global_debug_log_filter(void)
{
if (global_debug_log_filter != NULL)
event_filter_unref(&global_debug_log_filter);
}
void event_set_global_debug_send_filter(struct event_filter *filter)
{
event_unset_global_debug_send_filter();
global_debug_send_filter = filter;
event_filter_ref(global_debug_send_filter);
}
struct event_filter *event_get_global_debug_send_filter(void)
{
return global_debug_send_filter;
}
void event_unset_global_debug_send_filter(void)
{
if (global_debug_send_filter != NULL)
event_filter_unref(&global_debug_send_filter);
}
void event_set_global_core_log_filter(struct event_filter *filter)
{
event_unset_global_core_log_filter();
global_core_log_filter = filter;
event_filter_ref(global_core_log_filter);
}
struct event_filter *event_get_global_core_log_filter(void)
{
return global_core_log_filter;
}
void event_unset_global_core_log_filter(void)
{
if (global_core_log_filter != NULL)
event_filter_unref(&global_core_log_filter);
}