unified preinit environment

[openwrt.git] / package / base-files / files / sbin / mount_root

diff --git a/package/base-files/files/sbin/mount_root b/package/base-files/files/sbin/mount_root
index 607877c..a783f3d 100755 (executable)
--- a/package/base-files/files/sbin/mount_root
+++ b/package/base-files/files/sbin/mount_root
@@ -3,19 +3,52 @@
 . /etc/functions.sh
 
 mount none /proc -t proc
-size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
+
+size=$(awk '/MemTotal:/ {l=5242880;mt=($2*1024);print((s=mt/2)<l)?mt-l:s}' /proc/meminfo)
 mount none /tmp -t tmpfs -o size=$size,nosuid,nodev,mode=1777
 
-grep rootfs /proc/mtd >/dev/null 2>/dev/null && {
-       mtd unlock rootfs
-       grep rootfs_data /proc/mtd >/dev/null 2>/dev/null && {
-               . /bin/firstboot
-               echo "switching to jffs2"
-               mount "$(find_mtd_part rootfs_data)" /jffs -t jffs2
-               fopivot /jffs /rom
-       }
-} || mount -o remount,rw /dev/root /
+if grep devfs /proc/filesystems >/dev/null; then
+       mount none /dev -t devfs
+else
+       mount -t tmpfs tmpfs /dev -o size=512K
+       mknod /dev/console c 5 1
+       exec >/dev/console </dev/console 2>&1
+fi
+
+mkdir /dev/shm
+
+if grep sysfs /proc/filesystems >/dev/null; then
+       mount -t sysfs none /sys
+       HOTPLUG=""
+       # use a minimal ruleset only for creating device nodes
+       /sbin/hotplug2 --no-persistent --coldplug --set-rules-file /etc/hotplug2-init.rules
+else
+       HOTPLUG="/sbin/hotplug2-dnode"
+fi
+echo "$HOTPLUG" > /proc/sys/kernel/hotplug
 
 mkdir -p /dev/pts
 mount none /dev/pts -t devpts
-grep sysfs /proc/filesystems >/dev/null && mount -t sysfs none /sys 2>&-
+
+jffs2_ready () {
+       mtdpart="$(find_mtd_part rootfs_data)"
+       magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"')
+       [ "$magic" != "deadc0de" ]
+}
+
+[ failsafe != "$1" ] && {
+       grep rootfs /proc/mtd >/dev/null 2>/dev/null && {
+               mtd unlock rootfs
+               grep rootfs_data /proc/mtd >/dev/null 2>/dev/null && {
+                       . /bin/firstboot
+                       jffs2_ready && {
+                               echo "switching to jffs2"
+                               mount "$(find_mtd_part rootfs_data)" /jffs -t jffs2
+                               fopivot /jffs /rom
+                       } || {
+                               echo "jffs2 not ready yet; using ramdisk"
+                               ramoverlay
+                       }
+               }
+       } || mount -o remount,rw /dev/root /
+}