diff -ru busybox-1.4.1.orig/init/Config.in busybox-1.4.1/init/Config.in
--- busybox-1.4.1.orig/init/Config.in 2007-01-24 21:34:50.000000000 +0000
+++ busybox-1.4.1/init/Config.in 2007-02-28 11:35:17.000000000 +0000
@@ -68,6 +68,17 @@
This does not apply to initramfs, which runs /init as PID 1 and
requires no special support.
+config FEATURE_INIT_UDEV
+ bool "Support creating a tmpfs file system on /dev and creating basic device nodes /dev/console and /dev/null"
+ default n
+ depends on INIT
+ help
+ If this option is enabled and the file /dev/console does not exist then
+ init will mount a tmpfs file system on /dev and create the basic device nodes
+ /dev/console and /dev/null. This allows a system to boot and run without any
+ device nodes in the root file system. The system startup scripts can create additional
+ device nodes as needed or a full udev implementation can take over.
+
config HALT
bool "poweroff, halt, and reboot"
default y
diff -ru busybox-1.4.1.orig/init/init.c busybox-1.4.1/init/init.c
--- busybox-1.4.1.orig/init/init.c 2007-01-24 21:34:50.000000000 +0000
+++ busybox-1.4.1/init/init.c 2007-02-28 11:52:32.000000000 +0000
@@ -969,6 +969,29 @@
}
#endif /* FEATURE_USE_INITTAB */
+#if ENABLE_FEATURE_INIT_UDEV
+int udev_create(void){
+ int e;
+
+ if((e = mount("/tmpfs", "/dev", "tmpfs", 0, 0)))
+ return e;
+
+ if((e = mknod("/dev/console", S_IFCHR | 0600, makedev(5, 1)))){
+ umount("/dev");
+ return e;
+ }
+
+ if((e = mknod("/dev/null", S_IFCHR | 0666, makedev(1, 3)))){
+ umount("/dev");
+ return e;
+ }
+ chmod("/dev", 0755);
+ chmod("/dev/null", 0666);
+
+ return 0;
+}
+#endif
+
int init_main(int argc, char **argv)
{
struct init_action *a;
@@ -1003,6 +1026,11 @@
init_reboot(RB_DISABLE_CAD);
#endif
+#if ENABLE_FEATURE_INIT_UDEV
+ if(access("/dev/console", R_OK | W_OK))
+ udev_create();
+#endif
+
/* Figure out where the default console should be */
console_init();
