diff --git a/vl.c b/vl.c
index a536784..cadd988 100644
--- a/vl.c
+++ b/vl.c
@@ -216,9 +216,6 @@
 int cursor_hide = 1;
 int graphic_rotate = 0;
 uint8_t irq0override = 1;
-#ifndef _WIN32
-int daemonize = 0;
-#endif
 const char *watchdog;
 const char *option_rom[MAX_OPTION_ROMS];
 int nb_option_roms;
@@ -2301,15 +2298,9 @@
     const char *loadvm = NULL;
     QEMUMachine *machine;
     const char *cpu_model;
-#ifndef _WIN32
-    int fds[2];
-#endif
     int tb_size;
     const char *pid_file = NULL;
     const char *incoming = NULL;
-#ifndef _WIN32
-    int fd = 0;
-#endif
     int show_vnc_port = 0;
     int defconfig = 1;
 
@@ -2975,11 +2966,6 @@
                     exit(1);
                 }
                 break;
-#ifndef _WIN32
-	    case QEMU_OPTION_daemonize:
-		daemonize = 1;
-		break;
-#endif
 	    case QEMU_OPTION_option_rom:
 		if (nb_option_roms >= MAX_OPTION_ROMS) {
 		    fprintf(stderr, "Too many option ROMs\n");
@@ -3194,64 +3180,10 @@
     }
 #endif
 
-#ifndef _WIN32
-    if (daemonize) {
-	pid_t pid;
-
-	if (pipe(fds) == -1)
-	    exit(1);
-
-	pid = fork();
-	if (pid > 0) {
-	    uint8_t status;
-	    ssize_t len;
-
-	    close(fds[1]);
-
-	again:
-            len = read(fds[0], &status, 1);
-            if (len == -1 && (errno == EINTR))
-                goto again;
-
-            if (len != 1)
-                exit(1);
-            else if (status == 1) {
-                fprintf(stderr, "Could not acquire pidfile: %s\n", strerror(errno));
-                exit(1);
-            } else
-                exit(0);
-	} else if (pid < 0)
-            exit(1);
-
-	close(fds[0]);
-	qemu_set_cloexec(fds[1]);
-
-	setsid();
-
-	pid = fork();
-	if (pid > 0)
-	    exit(0);
-	else if (pid < 0)
-	    exit(1);
-
-	umask(027);
-
-        signal(SIGTSTP, SIG_IGN);
-        signal(SIGTTOU, SIG_IGN);
-        signal(SIGTTIN, SIG_IGN);
-    }
-#endif
+    os_daemonize();
 
     if (pid_file && qemu_create_pidfile(pid_file) != 0) {
-#ifndef _WIN32
-        if (daemonize) {
-            uint8_t status = 1;
-            if (write(fds[1], &status, 1) != 1) {
-                perror("daemonize. Writing to pipe\n");
-            }
-        } else
-#endif
-            fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
+        os_pidfile_error();
         exit(1);
     }
 
@@ -3520,39 +3452,7 @@
         vm_start();
     }
 
-#ifndef _WIN32
-    if (daemonize) {
-	uint8_t status = 0;
-	ssize_t len;
-
-    again1:
-	len = write(fds[1], &status, 1);
-	if (len == -1 && (errno == EINTR))
-	    goto again1;
-
-	if (len != 1)
-	    exit(1);
-
-        if (chdir("/")) {
-            perror("not able to chdir to /");
-            exit(1);
-        }
-	TFR(fd = qemu_open("/dev/null", O_RDWR));
-	if (fd == -1)
-	    exit(1);
-    }
-
-    os_change_root();
-    os_change_process_uid();
-
-    if (daemonize) {
-        dup2(fd, 0);
-        dup2(fd, 1);
-        dup2(fd, 2);
-
-        close(fd);
-    }
-#endif
+    os_setup_post();
 
     main_loop();
     quit_timers();