diff --git a/src/os/unix/ngx_linux_config.h b/src/os/unix/ngx_linux_config.h
index 2b6eb9c..8a75e22 100644
--- a/src/os/unix/ngx_linux_config.h
+++ b/src/os/unix/ngx_linux_config.h
@@ -41,11 +41,6 @@
 #include <netinet/tcp.h>        /* TCP_CORK */
 
 
-/* Linux has no <sys/filio.h> so autoconfigure does not find FIONBIO */
-#ifndef HAVE_FIONBIO
-#define HAVE_FIONBIO  1
-#endif
-
 #include <ngx_auto_config.h>
 
 
diff --git a/src/os/unix/ngx_shared.c b/src/os/unix/ngx_shared.c
new file mode 100644
index 0000000..a19ca53
--- /dev/null
+++ b/src/os/unix/ngx_shared.c
@@ -0,0 +1,91 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#if (HAVE_MAP_ANON)
+
+void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
+{
+    void  *p;
+
+    p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);
+
+    if (p == MAP_FAILED) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
+                      "mmap(MAP_ANON|MAP_SHARED, " SIZE_T_FMT ") failed",
+                      size);
+        return NULL;
+    }
+
+    return p;
+}
+
+#elif (HAVE_MAP_DEVZERO)
+
+void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
+{
+    void      *p;
+    ngx_fd_t   fd;
+
+    fd = open("/dev/zero", O_RDWR);
+
+    if (fd == -1) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
+                      "open(/dev/zero) failed");
+        return NULL;
+    }
+
+    p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+
+    if (p == MAP_FAILED) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
+                      "mmap(/dev/zero, MAP_SHARED, " SIZE_T_FMT ") failed",
+                      size);
+        p = NULL;
+    }
+
+    if (close(fd) == -1) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() failed");
+    }
+
+    return p;
+}
+
+#elif (HAVE_SYSVSHM)
+
+#include <sys/ipc.h>
+#include <sys/shm.h>
+
+
+void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
+{
+    int    id;
+    void  *p;
+
+    id = shmget(IPC_PRIVATE, size, (SHM_R|SHM_W|IPC_CREAT));
+
+    if (id == -1) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
+                      "shmget(" SIZE_T_FMT ") failed", size);
+        return NULL;
+    }
+
+    ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "shmget id: %d", id);
+
+    p = shmat(id, NULL, 0);
+
+    if (p == (void *) -1) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmat() failed");
+        p = NULL;
+    }
+
+    if (shmctl(id, IPC_RMID, NULL) == -1) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmctl(IPC_RMID) failed");
+        p = NULL;
+    }
+
+    return p;
+}
+
+#endif
diff --git a/src/os/unix/ngx_shared.h b/src/os/unix/ngx_shared.h
new file mode 100644
index 0000000..ca077df
--- /dev/null
+++ b/src/os/unix/ngx_shared.h
@@ -0,0 +1,12 @@
+#ifndef _NGX_SHARED_H_INCLUDED_
+#define _NGX_SHARED_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+void *ngx_create_shared_memory(size_t size, ngx_log_t *log);
+
+
+#endif /* _NGX_SHARED_H_INCLUDED_ */
diff --git a/src/os/unix/ngx_time.h b/src/os/unix/ngx_time.h
index dbb7a0a..7cf3d01 100644
--- a/src/os/unix/ngx_time.h
+++ b/src/os/unix/ngx_time.h
@@ -9,7 +9,6 @@
 typedef uint64_t       ngx_epoch_msec_t;
 
 typedef ngx_int_t      ngx_msec_t;
-#define NGX_MAX_MSEC   (ngx_msec_t) -1
 
 typedef struct tm      ngx_tm_t;
 
@@ -20,11 +19,7 @@
 #define ngx_tm_mon     tm_mon
 #define ngx_tm_year    tm_year
 #define ngx_tm_wday    tm_wday
-#define ngx_tm_gmtoff  tm_gmtoff
-
-#ifndef SOLARIS
-#define ngx_tm_zone    tm_zone
-#endif
+#define ngx_tm_isdst   tm_isdst
 
 #define ngx_tm_sec_t   int
 #define ngx_tm_min_t   int
@@ -35,16 +30,14 @@
 #define ngx_tm_wday_t  int
 
 
+#if (HAVE_GMTOFF)
+#define ngx_tm_gmtoff  tm_gmtoff
+#define ngx_tm_zone    tm_zone
+#endif
+
+
 #if (SOLARIS)
-#define HAVE_TIMEZONE  1
-
-#define ngx_timezone() (- (daylight ? altzone : timezone) / 60)
-
-#elif defined __linux__
-#define HAVE_TIMEZONE  1
-
-#define ngx_timezone() (- timezone / 60 + daylight * 60)
-
+#define ngx_timezone(isdst) (- (isdst ? altzone : timezone) / 60)
 #endif