diff options
Diffstat (limited to 'src/backend/utils/error/elog.c')
| -rw-r--r-- | src/backend/utils/error/elog.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/backend/utils/error/elog.c b/src/backend/utils/error/elog.c index 470081a1800..239ac19882d 100644 --- a/src/backend/utils/error/elog.c +++ b/src/backend/utils/error/elog.c @@ -95,6 +95,15 @@ sigjmp_buf *PG_exception_stack = NULL; extern bool redirection_done; +/* + * Hook for intercepting messages before they are sent to the server log. + * Note that the hook will not get called for messages that are suppressed + * by log_min_messages. Also note that logging hooks implemented in preload + * libraries will miss any log messages that are generated before the + * library is loaded. + */ +emit_log_hook_type emit_log_hook = NULL; + /* GUC parameters */ int Log_error_verbosity = PGERROR_VERBOSE; char *Log_line_prefix = NULL; /* format for extra log line info */ @@ -1276,6 +1285,23 @@ EmitErrorReport(void) CHECK_STACK_DEPTH(); oldcontext = MemoryContextSwitchTo(ErrorContext); + /* + * Call hook before sending message to log. The hook function is allowed + * to turn off edata->output_to_server, so we must recheck that afterward. + * Making any other change in the content of edata is not considered + * supported. + * + * Note: the reason why the hook can only turn off output_to_server, and + * not turn it on, is that it'd be unreliable: we will never get here at + * all if errstart() deems the message uninteresting. A hook that could + * make decisions in that direction would have to hook into errstart(), + * where it would have much less information available. emit_log_hook is + * intended for custom log filtering and custom log message transmission + * mechanisms. + */ + if (edata->output_to_server && emit_log_hook) + (*emit_log_hook) (edata); + /* Send to server log, if enabled */ if (edata->output_to_server) send_message_to_server_log(edata); |