--- a/src/os/unix/ngx_posix_init.c
+++ b/src/os/unix/ngx_posix_init.c
@@ -6,6 +6,7 @@
 
 #include <ngx_config.h>
 #include <ngx_core.h>
+#include <nginx.h>
 
 
 ngx_int_t   ngx_ncpu;
@@ -17,8 +18,6 @@ ngx_uint_t  ngx_tcp_nodelay_and_tcp_nopu
 struct rlimit  rlmt;
 
 
-#if (NGX_POSIX_IO)
-
 ngx_os_io_t ngx_os_io = {
     ngx_unix_recv,
     ngx_readv_chain,
@@ -28,74 +27,16 @@ ngx_os_io_t ngx_os_io = {
 };
 
 
-ngx_int_t ngx_os_init(ngx_log_t *log)
-{
-    return ngx_posix_init(log);
-}
-
-
-void ngx_os_status(ngx_log_t *log)
+ngx_int_t
+ngx_os_init(ngx_log_t *log)
 {
-    ngx_posix_status(log);
-}
-
-
-#endif
-
-
-void ngx_signal_handler(int signo);
-
-
-typedef struct {
-     int     signo;
-     char   *signame;
-     void  (*handler)(int signo);
-} ngx_signal_t;
-
-
-ngx_signal_t  signals[] = {
-    { ngx_signal_value(NGX_RECONFIGURE_SIGNAL),
-      "SIG" ngx_value(NGX_RECONFIGURE_SIGNAL),
-      ngx_signal_handler },
-
-    { ngx_signal_value(NGX_REOPEN_SIGNAL),
-      "SIG" ngx_value(NGX_REOPEN_SIGNAL),
-      ngx_signal_handler },
+    ngx_log_error(NGX_LOG_NOTICE, log, 0, NGINX_VER);
 
-    { ngx_signal_value(NGX_NOACCEPT_SIGNAL),
-      "SIG" ngx_value(NGX_NOACCEPT_SIGNAL),
-      ngx_signal_handler },
-
-    { ngx_signal_value(NGX_TERMINATE_SIGNAL),
-      "SIG" ngx_value(NGX_TERMINATE_SIGNAL),
-      ngx_signal_handler },
-
-    { ngx_signal_value(NGX_SHUTDOWN_SIGNAL),
-      "SIG" ngx_value(NGX_SHUTDOWN_SIGNAL),
-      ngx_signal_handler },
-
-    { ngx_signal_value(NGX_CHANGEBIN_SIGNAL),
-      "SIG" ngx_value(NGX_CHANGEBIN_SIGNAL),
-      ngx_signal_handler },
-
-    { SIGALRM, "SIGALRM", ngx_signal_handler },
-
-    { SIGINT, "SIGINT", ngx_signal_handler },
-
-    { SIGIO, "SIGIO", ngx_signal_handler },
-
-    { SIGCHLD, "SIGCHLD", ngx_signal_handler },
-
-    { SIGPIPE, "SIGPIPE, SIG_IGN", SIG_IGN },
-
-    { 0, NULL, NULL }
-};
-
-
-ngx_int_t ngx_posix_init(ngx_log_t *log)
-{
-    ngx_signal_t      *sig;
-    struct sigaction   sa;
+#if (NGX_HAVE_OS_SPECIFIC_INIT)
+    if (ngx_os_specific_init(log) != NGX_OK) {
+        return NGX_ERROR;
+    }
+#endif
 
     ngx_init_setproctitle(log);
 
@@ -105,23 +46,12 @@ ngx_int_t ngx_posix_init(ngx_log_t *log)
         ngx_ncpu = 1;
     }
 
-    for (sig = signals; sig->signo != 0; sig++) {
-        ngx_memzero(&sa, sizeof(struct sigaction));
-        sa.sa_handler = sig->handler;
-        sigemptyset(&sa.sa_mask);
-        if (sigaction(sig->signo, &sa, NULL) == -1) {
-            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
-                          "sigaction(%s) failed", sig->signame);
-            return NGX_ERROR;
-        }
-    }
-
     if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
         ngx_log_error(NGX_LOG_ALERT, log, errno,
                       "getrlimit(RLIMIT_NOFILE) failed)");
         return NGX_ERROR;
     }
-
+    
     ngx_max_sockets = rlmt.rlim_cur;
 
 #if (NGX_HAVE_INHERITED_NONBLOCK)
@@ -134,157 +64,21 @@ ngx_int_t ngx_posix_init(ngx_log_t *log)
 }
 
 
-void ngx_posix_status(ngx_log_t *log)
+void
+ngx_os_status(ngx_log_t *log)
 {
+#if (NGX_HAVE_OS_SPECIFIC_INIT)
+    ngx_os_specific_status(log);
+#endif
+
     ngx_log_error(NGX_LOG_NOTICE, log, 0,
                   "getrlimit(RLIMIT_NOFILE): %r:%r",
                   rlmt.rlim_cur, rlmt.rlim_max);
 }
 
 
-void ngx_signal_handler(int signo)
-{
-    char            *action;
-    struct timeval   tv;
-    ngx_int_t        ignore;
-    ngx_err_t        err;
-    ngx_signal_t    *sig;
-
-    ignore = 0;
-
-    err = ngx_errno;
-
-    for (sig = signals; sig->signo != 0; sig++) {
-        if (sig->signo == signo) {
-            break;
-        }
-    }
-
-    ngx_gettimeofday(&tv);
-    ngx_time_update(tv.tv_sec);
-
-    action = "";
-
-    switch (ngx_process) {
-
-    case NGX_PROCESS_MASTER:
-    case NGX_PROCESS_SINGLE:
-        switch (signo) {
-
-        case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
-            ngx_quit = 1;
-            action = ", shutting down";
-            break;
-
-        case ngx_signal_value(NGX_TERMINATE_SIGNAL):
-        case SIGINT:
-            ngx_terminate = 1;
-            action = ", exiting";
-            break;
-
-        case ngx_signal_value(NGX_NOACCEPT_SIGNAL):
-            ngx_noaccept = 1;
-            action = ", stop accepting connections";
-            break;
-
-        case ngx_signal_value(NGX_RECONFIGURE_SIGNAL):
-            ngx_reconfigure = 1;
-            action = ", reconfiguring";
-            break;
-
-        case ngx_signal_value(NGX_REOPEN_SIGNAL):
-            ngx_reopen = 1;
-            action = ", reopening logs";
-            break;
-
-        case ngx_signal_value(NGX_CHANGEBIN_SIGNAL):
-            if (getppid() > 1 || ngx_new_binary > 0) {
-
-                /*
-                 * Ignore the signal in the new binary if its parent is
-                 * not the init process, i.e. the old binary's process
-                 * is still running.  Or ingore the signal in the old binary's
-                 * process if the new binary's process is already running.
-                 */
-
-                action = ", ignoring";
-                ignore = 1;
-                break;
-            }
-
-            ngx_change_binary = 1;
-            action = ", changing binary";
-            break;
-
-        case SIGALRM:
-            if (!ngx_terminate) {
-                ngx_timer = 1;
-                action = ", shutting down old worker processes";
-            }
-
-            break;
-
-        case SIGIO:
-            ngx_sigio = 1;
-            break;
-
-        case SIGCHLD:
-            ngx_reap = 1;
-            break;
-        }
-
-        break;
-
-    case NGX_PROCESS_WORKER:
-        switch (signo) {
-
-        case ngx_signal_value(NGX_NOACCEPT_SIGNAL):
-            ngx_debug_quit = 1;
-        case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
-            ngx_quit = 1;
-            action = ", shutting down";
-            break;
-
-        case ngx_signal_value(NGX_TERMINATE_SIGNAL):
-        case SIGINT:
-            ngx_terminate = 1;
-            action = ", exiting";
-            break;
-
-        case ngx_signal_value(NGX_REOPEN_SIGNAL):
-            ngx_reopen = 1;
-            action = ", reopening logs";
-            break;
-
-        case ngx_signal_value(NGX_RECONFIGURE_SIGNAL):
-        case ngx_signal_value(NGX_CHANGEBIN_SIGNAL):
-        case SIGIO:
-            action = ", ignoring";
-            break;
-        }
-
-        break;
-    }
-
-    ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0,
-                  "signal %d (%s) received%s", signo, sig->signame, action);
-
-    if (ignore) {
-        ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, 0,
-                      "the changing binary signal is ignored: "
-                      "you should shutdown or terminate "
-                      "before either old or new binary's process");
-    }
-
-    if (signo == SIGCHLD) {
-        ngx_process_get_status();
-    }
-
-    ngx_set_errno(err);
-}
-
-
-ngx_int_t ngx_posix_post_conf_init(ngx_log_t *log)
+ngx_int_t
+ngx_posix_post_conf_init(ngx_log_t *log)
 {
     ngx_fd_t  pp[2];