merge r3473, r3474, r3385, r3386, r3537:

signal processing stability:

*) use sys_errlist[] in signal handler instead
   of non Async-Signal-Safe strerror_r()
*) do not update time in the timer signal handler,
   since localtime_r() is not Async-Signal-Safe function
*) use previously cached GMT offset value to update time from a signal handler
*) change ngx_time_update() interface since there are no notification methods
   those return time
*) introduce ngx_time_sigsafe_update() to update the error log time only
*) change ngx_time_update() interface

1 files changed, 3 insertions, 3 deletions

diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
index e3b054834..812b36fc4 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -168,7 +168,7 @@ ngx_master_process_cycle(ngx_cycle_t *cycle)
 
         sigsuspend(&set);
 
-        ngx_time_update(0, 0);
+        ngx_time_update();
 
         ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
                        "wake up, sigio %i", sigio);
@@ -1337,7 +1337,7 @@ ngx_cache_manager_process_handler(ngx_event_t *ev)
 
             next = (n <= next) ? n : next;
 
-            ngx_time_update(0, 0);
+            ngx_time_update();
         }
     }
 
@@ -1367,7 +1367,7 @@ ngx_cache_loader_process_handler(ngx_event_t *ev)
 
         if (path[i]->loader) {
             path[i]->loader(path[i]->data);
-            ngx_time_update(0, 0);
+            ngx_time_update();
         }
     }