Custom initrd & linuxrc console issue

[Stealth1971]

Its nice to see a linux community thats not a list server

OK - about 40 hours later - I cannot fix this last piece of my custom linuxrc for my custom initrd. BTW - this for an embedded x86 project thats going to boot from a flash drive but during the prototyping I am want to gen a boot CD. So the the current target is bootable LiveCD.

My custom kernel executes, my initrd mounts, my squashfs mounts, and my linuxrc script executes - until I get to the very end...

Here is the script:

# mount proc to be able to use /proc/filesystems
 
mount /proc 

# Stage 1 filesystem 
# ==================
#
# Minimal initrd filesystem with /dev initialized for std , console and hd{a-d}
# Mount -t devfs devfs /dev shows the cdroms in /dev/cdroms
echo "**** remounting root"
mount -o remount,rw /
 
 
# Stage 2 filesystem
# ==================
#
# A new ramdisk with some stuff copied in, other stuff symlinked from a 
# loop mounted image on the cdrom.
 
echo "**** creating stage2"
mkdir -p /mnt/stage2
mount -t tmpfs tmpfs /mnt/stage2
 
mkdir /mnt/stage2/dev \
      /mnt/stage2/mnt \
      /mnt/stage2/mnt/cdrom \
      /mnt/stage2/mnt/livecd \
      /mnt/stage2/tmp \
      /mnt/stage2/tmp/.initrd \
      /mnt/stage2/proc \
      /mnt/stage2/sys
 
 
# mount the cdrom inside stage2

echo "**** copying initrd devices"
cp -Rap /dev/* /mnt/stage2/dev
 
echo "**** mounting cd"
cp -Rap /dev/hdc /mnt/stage2/dev
mount -t iso9660 -o ro /mnt/stage2/dev/hdc /mnt/stage2/mnt/cdrom
 
# mount the image on the cdrom - TODO: use stage2 /dev

echo "**** mounting /dev" 
mount -o bind /mnt/stage2/dev /dev
echo "**** mounting squashfs" 
mount -t squashfs -o loop,ro /mnt/stage2/mnt/cdrom/livecd.squashfs /mnt/stage2/mnt/livecd
umount /dev
 
# fill stage2 with symlinks to the loop mounted image
 
cd /mnt/stage2

echo "**** mounting creating links" 
 
for x in ${ROOT_LINKS}
do
    ln -s "mnt/livecd/${x}" "${x}"
done
 
# fill stage2 with data copied from the loop mounted image

echo "**** mounting creating links" 
 
cd /mnt/stage2/mnt/livecd
cp -a ${ROOT_TREES} /mnt/stage2
 
mkdir -p /mnt/stage2/home
 
# make sure permissions are ok

echo "**** chmod-ing /tmp" 

cd /mnt/stage2
chmod 1777 tmp
 
echo "**** unmounting /proc" 
umount /proc 2>/dev/null
 
# switch / from stage1 to stage2
 
echo "**** pivot_root" 
pivot_root . tmp/.initrd

mount -t sysfs /sys /sys

echo "**** console redirect" 
exec dev/console 2>&1
exec chroot . /bin/ash <<- EOF
    exec /sbin/init
EOF
 
echo "**** exec /bin/ash" 
exec /bin/ash

The error I get is

/linuxrc: dev/console: Permission denied
kernel panic - not syncing:Attempted to kill init!

This is the line its yacking on:
exec dev/console 2>&1


Thanks in advance for any help...

[Stealth1971]

Well after reading the pivot_root man page closer, I came across:

Note that exec chroot changes the running executable, which is necessary if the old root directory should be unmounted afterwards. Also note that standard input, output, and error may still point to a device on the old root file system, keeping it busy. They can easily be changed when invoking chroot (see below; note the absence of leading slashes to make it work whether pivot_root has changed the shell's root or not).

This lead me to think that the /dev/console might be locked with the current shell?

So I a changed

exec dev/console 2>&1 
exec chroot . /bin/ash <<- EOF 
    exec /sbin/init 
EOF

to

exec chroot . sh <<- EOF 
   <dev/console >dev/console 2>&1 
   exec /sbin/init 
EOF

This changes the the stdin, stdout & stderr during the exec of chroot instead of before hand...

I hope this helps anyone with similar issues - or my assumptions here are wrong please let me know!